JPS6362702A - Cutter for machining tapered shaft - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a cutting device that cuts a rectangular rod-shaped material made of wood to form a tapered shaft.

[Conventional technology and its problems]

As shown in FIG. 7, the single piece A with a tapered shaft part a at the tip gives an extremely high-class feel and is widely used in Japanese restaurants and the like.

In the above-mentioned case A, the material is usually a rectangular bar made of cedar, and the material is cut to form the tapered shaft part a. Conventionally, however, the tapered shaft part a is provided by manual cutting. As a result, it is very time-consuming and has the disadvantage of poor production efficiency.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned disadvantages and provide a highly productive cutting device capable of mechanically cutting a tapered shaft.

[Structure of the invention]

In order to achieve the above object, the present invention provides a guide member having a rectangular insertion hole, and a pair of guide members arranged at a distance such that the tip of a rectangular rod-shaped material to be inserted into the insertion hole of the guide member can be inserted. and a cutter support plate, the cutter support plate is provided so as to be able to rotate on its own axis and to revolve around the axial extension line of the insertion hole, and the cutting edge of the canter is provided protrudingly on the opposing surface of each canter support plate, The blade edge is inclined so that the inner end located at the center of the cutter support plate is located forward of the outer end located at the outer periphery of the cutter support plate.

Here, the cutter is mounted so that the facing surface of the cutter support plate that supports the cutter is a conical surface with a high center, and the cutting edge of the cutter protrudes uniformly over the entire length of the cutting edge with respect to the conical surface. Alternatively, the facing surface of the cutter support plate may be a flat surface, and the cutter may be mounted so that the cutting edge of the cutter is inclined with respect to the flat surface.

[Operation] When a rectangular rod-shaped material is inserted into the insertion hole of the guide member and the pair of cutter support plates are rotated in opposite directions in the fixed position while pushing the material in the axial direction, the inclined cutting edge of the cutter is rotated. With this, it is possible to cut the material in a tapered shape at a position facing the tip end thereof. In the cutting state, by revolving the pair of cutter support plates, the cutting position 1 relative to the material changes in the circumferential direction of the material. Therefore, by rotating the pair of cutter support plates and revolving around the material, a tapered shaft can be formed at the tip of the material inserted between the pair of cutter support plates from the insertion hole of the guide member. Can be done.

〔Example〕

Embodiments of the present invention will be described below with reference to the accompanying drawings.

As shown in FIGS. 1 to 3, a guide member 1 is fixed on a support frame 2 of a frame that is appropriately assembled, and a rectangular insertion hole 3 is formed in the guide member 1 to pass through it from front to back. .

A rotary disk 4 is disposed in front of the guide member 1, and the rotary disk 4 is rotatable around the axial extension line of the insertion hole 3, and is driven by the arrow shown in FIG. 2 by a drive device (not shown). rotated in the direction A pair of cutter devices 10.10 are provided on the front surface of this rotary disk 4.

The force lid device 10 has an L-shaped bracket 1) fixed to the front surface of the rotary disk 4, and a bearing 12 on the bracket 1).
A motor 14 for rotationally driving the rotating shaft 13 supported by the bearing 12 is attached.

Although not shown in the drawings, power is supplied to the motor 14 by attaching a plurality of annular conductors to the back of the rotary disk 4, contacting each conductor with a power supply, and connecting the conductors and the motor with a cord.

Further, a circular cutter support plate 15 is attached to the inner end of the rotary shaft 13 located at the center of the rotary disk 4, and a plurality of cutter support pieces 16 are provided at equal intervals on the back surface of the cutter support plate 15 to support the cutter. Blade edge 1 of cutter 17 screwed to piece 16
8 is made to protrude from the front surface of the cutter support plate 15 through a guide hole 19 formed in the cutter support plate 15 (Figs. 4 to 6).
(see figure).

Here, the front surface of the cutter support plate 15 becomes a conical surface 20 with a high central portion, and from the conical surface 20 the cutter 17
The cutting edge 18 of the canter 17 protrudes, and the protruding length thereof is uniform over the entire length of the cutting edge 18 of the canter 17.

Further, the cutting edge 18 of the cutter 17 is long toward the center of the cutter support plate 15 and is inclined with respect to a straight line passing through the center of the cutter support plate 15 .

A pair of cutter devices 10.10 having the above configuration are arranged symmetrically around the center of the rotary disk 4 at an interval of 180'', and a cutter support plate 10.10 is arranged between the center lines of a pair of cutter support plates 15. A dimensional shift is provided that corresponds approximately to the radius of the plate 15. Also, an interval is formed between the mutually opposing conical surfaces 20 of the pair of cutter support plates 15, into which the tip of the material B can be inserted. The distance between them gradually decreases in the direction in which the material B is inserted.

A stopper 21 for limiting the insertion amount of the material B is arranged between the pair of cutter supports +ff15, and support pieces 22 connected to both ends of the stopper 21 are supported by the rotary disk 4.

Now, when the rotary disk 4 is stopped, the guide member 1
Insert a rectangular rod-shaped material B into the insertion hole 3 of the material B, and push the tip of the material B toward the space between the pair of cutter support plates 15. When rotated in opposite directions by the drive of
The opposing position (both sides) at the tip of material B is cutter 1.
Cut by 7. At this time, the conical surface 20 of the cutter support plate 15 is inclined with respect to the side surface of the material B, and the cutting edge 18 of the cutter 17 protrudes uniformly over the entire length with respect to the conical surface 20. Both sides can be cut into a tapered shape.

In the above cutting state, when the rotary disk 4 is rotated, the pair of canter devices 10 revolve around the material B, so the cutting position of the cutter 17 changes in the circumferential direction of the material B. For this reason, the rotary disk 4 and the pair of forces, the Tsuku support disk 1
5 is rotated, the insertion hole 3 of the guide member 1
Insert the material B into a pair of cutter support plates 15.
By pushing the tapered shaft a into the tip of the material B,
is cut to form a single chopstick A shown in FIG.

In the case of the embodiment, the pair of cutter support plates 15 are arranged symmetrically with respect to the axial extension line of the insertion hole 3 of the guide member 1, but the outer diameter of the cutter support plates 15 and the cutting edge 1 of the cutter 17
By appropriately determining the inclination angle of cutter support plate 8, the pair of cutter support plates 15 can be arranged coaxially. At this time, the axis of the cutter support plate 15 may be at a position perpendicular to the extension of the axis of the insertion hole 3, or may be offset from the extension of the axis of the material B. It is preferable that the axial center of the cutter support plate 15 be perpendicular to the axial center extension line of the insertion hole 3 in order to absorb the impact during cutting applied to the cutter support plate 15 .

In addition, although the opposing surfaces of the pair of cutter support plates 15 are made into conical surfaces 20 with a higher central portion, the opposing surfaces of the cutter support plates 150 are made into mutually parallel planes, and the cutting edge 18 of the cutter 17 is made to protrude from the plane. The tip of the blade is supported by a canter of 18! ff1
The inner end located at the center of 5 may be inclined so as to protrude from the outer end.

〔effect〕

As described above, in the present invention, a pair of cutter support plates each having a canter are made to rotate in opposite directions and also revolve around the material inserted between the cutter support plates. A tapered shaft can be cut into the tip of the material by simply inserting the material between the plates, and the tapered shaft can be formed extremely efficiently.

[Brief explanation of the drawing]

FIG. 1 is a front view showing one embodiment of a cutting device according to the present invention, FIG. 2 is a sectional view taken along the line ■-■ in FIG. 1, and FIG.
The figure is a partially cutaway plan view of the same as the above, FIG. 4 is a front view of the cutter support plate of the same as the above, FIG. 5 is a sectional view taken along the v-vl of FIG. Sectional view along the Vl line, No. 7
The figure is a perspective view of a single chopstick with a tapered shaft. 1... Guide member, 3... Insertion hole, 1
5... Canter support plate, 17... Cutter, 18... Cutting edge, 20... Conical surface. Figure 4'6, Figure 5, Figure 7A

Claims (2)

[Claims] (1) Consists of a guide member having a square insertion hole and a pair of cutter support plates arranged at a distance such that the tip of a square rod-shaped material inserted into the insertion hole of the guide member can be inserted; The support plate is provided so as to be able to rotate on its own axis and to revolve around the axial extension line of the insertion hole, and the blade edge of the cutter is provided protrudingly on the opposing surface of each cutter support plate, and the blade edge is attached to the center of the cutter support plate. A cutting device for processing a tapered shaft, which is inclined so that the inner end located at the outer edge of the cutter support plate is located forward of the outer end located at the outer periphery of the cutter support plate. (2) The opposing surface of the cutter support plate is a conical surface with a high central portion, and the cutting edge of the cutter is made to protrude uniformly over the entire length of the cutting edge with respect to the conical surface. A cutting device for tapered shaft machining as described in scope (1).