JPS623202Y2 - - Google Patents

Description

[Detailed description of the invention] Technical field This invention is composed of a fixed cutter body and a movable cutter body that is movable and adjusted in the axial direction of the fixed cutter body, and the total width of the cutting blades of both cutter bodies can be arbitrarily adjusted. This invention relates to a rotary cutter for woodworking that can be adjusted and set.

Purpose of the invention The purpose of this invention is to be able to extremely easily adjust the movement of the cutting blades of both cutter bodies, and to maintain a constant positional relationship between the fixed and movable cutter bodies in the direction of cutting rotation, thereby achieving good cutting performance. The purpose of the present invention is to provide a rotary cutter for woodworking that can obtain high performance.

Example The first example that embodies this idea will be described below.
To explain based on FIGS. 3 to 3, the fixed cutter body 1 has a cylindrical boss portion 2 at the center, and is fitted into and fixed to a rotational drive shaft (not shown) of an electric motor or the like in the boss portion 2. It's becoming like that. A pair of arm parts 3 are formed protruding from the outer periphery of the boss part 2 at 180 degrees apart, and a cutting blade 4 is provided at the tip of each arm part 3.

A single spiral protruding cam portion 5 is integrally formed on the outer periphery of the boss portion 2 . Further, a regulating pin 6 is implanted and fixed to each of the arm portions 3.

A movable cutter body 7 is fitted into the boss portion 2 so as to be movable in the axial direction thereof. This movable cutter body 7 has a boss portion 8 and a pair of arm portions 1 each having a cutting blade 9, similar to the fixed cutter body 1.
0. The cutting blade 9 is located on the same circumference as the cutting blade 4 of the fixed cutter body 1.

A regulation hole 11 is transparently provided in both arm parts 10, and the regulation pin 6 is inserted into the regulation hole 11, so that the movable cutter body 7 rotates relative to the fixed cutter body 1 in the cutting rotation direction. I've learned not to. Therefore, the restriction pin 6 and the restriction hole 11 constitute a rotation prevention mechanism for preventing relative rotation of the movable cutter body 7. Movable cutter body 7
An annular guide groove 12 is formed on the outer periphery of the boss portion 8 .

By adjusting the movement of the movable cutter body 7 in the axial direction of the boss portion 2, the total width W of the cutting blades 4 and 9 of both cutter bodies 1 and 7 is changed, and a groove of any width can be cut. .

An operating ring 13 is fitted into the boss portion 2 so as to be rotatable and movable in the axial direction, and a spiral grooved cam 14 formed on the inner circumference thereof is fitted into the protruding cam 5. Therefore, by rotating the operating ring 13, the operating ring 13 itself is moved in the axial direction based on the cam action of the protruding cam 5 and the grooved cam 14. A plurality of guide pins 15 are provided on the movable cutter body 7 side of the operation ring 1 and are fitted into the guide grooves 12.
is implanted and fixed, and as the operation ring 13 moves in the axial direction, the movable cutter body 7 is moved in the same direction. Therefore, the guide groove 12 and the guide pin 15 constitute a connection mechanism between the movable cutter body 7 and the operating ring 13. In this embodiment, the operating ring 13 is
Movable cutter body 7 by rotating 360 degrees
so that you can get a full travel stroke of
The degree of inclination of the protruding cam 5 and the grooved cam 14 is set.

As shown in FIG. 3, a scale 16 is attached to the outer periphery of the operating ring 13, and a pointer 17 for indicating the scale 16 is fixed to the boss portion 8 of the movable cutter body 7. The movement position of the movable cutter body 7 based on the dynamic operation, that is, the total width W of both the cutting blades 4 and 9 is displayed to display the width of the groove that can be cut.

As shown in FIG. 1, a split groove 18 is formed in the boss portion 8 of the movable cutter body 7 from the outer circumference to the inner circumference, and a notch 19 is formed in the inner circumferential surface. 2 can be held elastically. A tightening bolt 20 is screwed into the boss portion 8 so as to cross the split groove 18, and by tightening the tightening bolt 20, the boss portion 8 is tightened and fixed to the boss portion 2 of the fixed cutter body 1. I'm starting to be able to do it.
Therefore, the boss portion 8 in which the grooves 18 and notches 19 are formed, and the tightening bolt 20 constitute a fixing mechanism for fixing the movable cutter body 7 to the boss portion 2 of the fixed cutter body 1.

A ring 31 is provided on the outer periphery of the tip of the boss portion 2 of the fixed cutter body 1 to prevent the operation ring 13 from coming out of the boss portion 2.

Now, in order to cut a groove of any width using the woodworking rotary cutter configured as described above, loosen the tightening bolt 20 to release the fastening of the movable cutter body 7 to the fixed cutter body 1, Operation ring 1
3 to adjust the total width W of the cutting blades 4 and 9 of both cutter bodies 1 and 7 to the desired groove width, and then tighten the tightening bolt 20 to fix the movable cutter body 7 at the boss portion of the cutter body 1. It should be fixed at 8.

In this way, the total width W of both cutting blades 4 and 9 can be changed and adjusted very easily to cut a groove of any width. Furthermore, due to the engagement between the regulating pin 6 and the regulating hole 11, the movable cutter body 7 is prevented from being rotationally displaced in the cutting rotation direction relative to the fixed cutter body 1.
Both cutter bodies 1 and 7 are always maintained in a constant positional relationship. Therefore, regardless of changes in the total width W of both cutting blades 4 and 9, cutting can always be performed under constant conditions, and good cutting performance can be obtained.

Note that, if the entire movement stroke of the movable cutter body 7 is obtained by one rotation of the operating ring 13 as in this embodiment, not only will the adjustment of the movement of the movable cutter body 7 become even easier. , the total cutting blade width W can be easily read using the scale 16. In other words, in the case where the moving stroke of the movable cutter body 7 is obtained by multiple rotations of the operating ring 13, the total width of the cutting blade must be read in consideration of the number of rotations of the operating ring and the scale. Alas, it's complicated.

Next, a second embodiment of this invention will be explained based on FIGS. 4 and 5. This second embodiment has a configuration for fixing the movable cutter body 7 to the fixed cutter body 1. In place of the tightening bolts 20 and the like in one embodiment, the following configuration is adopted.

That is, the regulating pin 6 is used to prevent relative rotation of the movable cutter body 7 with respect to the fixed cutter body 1.
It is made into a cylindrical shape, provided with a dividing groove 22 so that a dividing piece 21 is formed, and a female thread 23 is formed on the inner periphery. An inclined surface 24 is formed at the inner circumferential opening end of the regulating pin 6 .

In addition, a fixing screw 25 is attached to the female thread 23 of the regulating pin 6.
is screwed in, and the inclined surface 24 is formed on the outer periphery of its head.
An inclined surface 26 corresponding to this is formed. Therefore, by screwing in the fixing screw 25 by a certain amount or more, the dividing piece 21 is expanded by the action of the both inclined surfaces 24 and 26, and the regulating hole 1 of the movable cutter body 7 is expanded.
The movable cutter body 7 is pressed against the inner circumferential surface of the movable cutter body 1 so that the movable cutter body 7 can be fixed at an arbitrary movement position so as not to move in the axial direction.

Therefore, after setting the total width W of the cutting blades 4 and 9, fixation is performed by press-fitting the regulating pin 6 and the regulating hole 11 by screwing the fixing screw 25.

Other structures and functions are the same as those of the first embodiment.

Next, a third embodiment of this invention will be described based on FIG. 6. In this third embodiment, the operation ring 13 can be rotated and moved in the axial direction around the outer circumference of the boss portion 2 of the fixed cutter body 1. A sleeve 27 having a grooved cam 14 that fits into the protruding cam 5, and a fixed ring 28 that is fitted and fixed to the outer periphery of the sleeve 27.
It is composed of:

A flange portion 29 is integrally formed at the end of the sleeve 27 on the fixed cutter body 1 side so as to sandwich the boss portion 8 of the movable cutter body 7 with the fixed ring 28 . The movable cutter body 7 is connected to the flange portion 2
It is fitted around the outer periphery of the sleeve 27 between the ring 9 and the fixed ring 28 . Further, a hollow set screw 30 is passed through the fixed ring 28 and engages with the boss portion 8 of the movable cutter body 7 to pressly engage the movable cutter body 7 with the flange portion 29.

A threaded portion 32 is formed on the outer periphery of the tip of the boss portion 2 of the fixed cutter body 1, and a double nut 33 is screwed into this portion.
By tightening the end face of the sleeve 27, the sleeve 27 can be fixed to the boss portion 2.

The guide groove 12 in the first and second embodiments,
Guide pin 15 and ring 31 are not provided.

Therefore, when adjusting the total width W of the cutting blades 4 and 9, loosen the hollow set screw 30 away from the boss portion 8 of the movable cutter body 7, and
After loosening the double nut 33 away from the sleeve 27 and rotating the operating ring 13, the hollow set screw 30 and the double nut 33 are tightened to the boss portion 8 and the sleeve 27, respectively, so that the sleeve 27 is attached to the boss of the fixed cutter body 1. 2, and the movable cutter body 7 is fixed to the flange part 29.
The cutting blade is press-fitted and fixed at that position, and the total width W of the cutting blade is adjusted and set.

Other structures and functions are the same as those of the first embodiment.

Effects of the invention As exemplified in the embodiments above, this invention allows the total width of the cutting blades of both cutter bodies to be adjusted by rotating the operating member, and also ensures that the positional relationship between both cutter bodies is always in a constant state. By being configured to be held, the total width of the cutting blades can be changed and adjusted very easily, and excellent cutting performance can always be obtained.

Other Examples Note that this invention is not limited to the first to third embodiments described above, and may be embodied in the following embodiments.

(a) Both cutter bodies should be disk-shaped and cutting edges should be provided around the entire outer periphery.

(b) The entire movement stroke of the movable cutter body should be obtained by two or three rotations of the operating ring.

(c) The cutting blades of both cutter bodies should be arranged on concentric circles with different diameters. By turning it in this way, it is possible to cut a groove with a step-like bottom surface.

(d) The configurations of each of the above embodiments and items (a) to (c) above may be combined as appropriate.

(e) As shown by the two-dot chain line in Figures 1 and 2,
As a means for preventing relative rotation between the fixed cutter body 1 and the movable cutter body 7, an engagement structure using a key 34 and a key groove 35 is adopted. In FIGS. 1 and 2, a key 34 is attached to the movable cutter body 7.
Insert the keyway 35 into the boss part 2 of the fixed cutter body 1.
, respectively, and the reverse is also possible. In this way, the regulation pin 6 and the regulation hole 1
1 becomes unnecessary.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway front view showing the rotary cutter of the first embodiment embodying this invention, Fig. 2 is a cross-sectional view, Fig. 3 is a perspective view showing the scale and pointer, and Fig. 4 is a perspective view showing the scale and pointer. FIG. 5 is a partially enlarged sectional view, and FIG. 6 is a sectional view showing a third embodiment of the invention. Fixed cutter body 1, boss part 2, cutting blade 4, protruding cam 5, regulation pin 6, movable cutter body 7, boss part 8, cutting blade 9, regulation hole 11, guide groove 12, operating ring 13, groove cam 14, Guide pin 15, scale 1
6, pointer 17, split groove 18, tightening bolt 20,
Split groove 22, inclined surface 24, fixing screw 25, inclined surface 26, fixed ring 28, sleeve 27, flange portion 2
9. Hollow set screw 30, threaded portion 32, double nut 33, total width W.

Claims (1)

[Claims for Utility Model Registration] 1. A fixed cutter body 1 having a cutting blade 4 on its outer periphery and a cylindrical boss portion 2 at its center, which is attached and fixed to a rotational drive shaft at the boss portion 2; A movable cutter body 7 which is fitted into the boss part 2 so as to be movable along its axial direction and has a cutting blade 9 on its outer periphery is provided, and the total width W of both cutting blades 4 and 9 can be adjusted. In the rotary cutter for use, the rotation prevention mechanism 6, 11 is provided between the fixed cutter body 1 and the movable cutter body 7 and prevents the movable cutter body 7 from rotating relative to the fixed cutter body 1; and the boss portion. an operating member 13 rotatably and axially movably fitted to the boss portion 2; and an operating member 13 provided between the boss portion 2 and the operating member 13;
Cam parts 5 and 14 that move the operating member 13 in the axial direction as the operating member 13 rotates.
a coupling mechanism provided between the operating member 13 and the movable cutter body 7 so that the movable cutter body 7 can move in the same direction following the movement of the operating member 13 in the axial direction; A rotary cutter for woodworking, comprising: a fixing mechanism for fixing the cutter body 7 to the boss portion 2 at an arbitrary moving position. 2. The rotation prevention mechanism is composed of a regulation pin 6 implanted and fixed to the fixed cutter body 1, and a regulation hole 11 transparently provided in the movable cutter body 7 so that the regulation pin 6 is inserted therethrough. A rotary cutter for woodworking according to claim 1 of the utility model registration claim. 3. The operating member has a scale 16 on the outer periphery, and the movable cutter body 7 has a pointer 17 that indicates the scale 16. The scale 16 and the pointer 17 allow the total width W of both cutting blades 4, 9 to be calculated. A rotary cutter for woodworking according to claim 1 of the utility model registration claim, which is capable of displaying information. 4. The rotary cutter for woodworking according to claim 1, wherein the cam portion is configured such that the entire movement stroke of the movable cutter body 7 can be obtained by approximately one rotation of the operating member 13. 5. The coupling mechanism is composed of an annular guide groove 12 formed in the movable cutter body 7 and a guide pin 15 provided on the operating member 13 so as to be fitted into the guide groove 12. A rotary cutter for woodworking according to claim 1 of the patent registration claim. 6. The coupling mechanism is provided on the operating member 13 and is constituted by a flange portion 29 and a ring body 28 located on both sides of the center of the movable cutter body 7. A rotary cutter for woodworking as described in section. 7. A utility model in which the fixing mechanism is composed of a boss portion 8 of the movable cutter body 7 having a split groove 18 and a tightening bolt 20 screwed into the boss portion 8 so as to cross the split groove 18. A rotary cutter for woodworking according to claim 1. 8 The fixing mechanism has a cylindrical shape and has a dividing groove 2.
2, and an inclined surface 2 is provided at the inner peripheral opening end.
4, and a fixing screw 25 that is screwed into the regulating pin 6 and has an inclined surface 26 on its head. Inclined surface 24,2
The regulation pin 6 is expanded by the action of the regulation hole 1.
1. A rotary cutter for woodworking according to claim 2, which is press-fitted to the inner circumferential surface of the woodworking tool. 9 The fixing mechanism is provided on the operating member 13 and is screwed into the flange portion 29 and hollow set screw 30 located on both sides of the center of the movable cutter body 7 and the outer peripheral threaded portion 32 of the boss portion 2 of the fixed cutter body 1, A rotary cutter for woodworking according to claim 1, which is constituted by a double nut 33 for tightening and fixing the operating member 13 to the boss portion 2.