JPH0331561B2 - - Google Patents

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, a single chopstick A having a tapered shaft portion a at its tip gives an extremely high-class feel and is widely used in Japanese restaurants and the like.

The above-mentioned chopsticks A are usually made of a rectangular bar made of cedar, and the material is cut to provide a tapered shaft part a.
Since the cutting was done by hand, it was very time-consuming and had the disadvantage of poor production efficiency.

[Purpose of the invention]

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

[Structure of the invention]

In order to achieve the above object, in the present invention, a guide member having a square insertion hole and a tip of a square rod-shaped material to be inserted into the insertion hole of the guide member are arranged at intervals such that the tip can be inserted. a pair of cutter support plates, a rotary disk that supports the pair of cutter support plates and a motor for driving the cutter support plates, and is driven to rotate in one direction with the rotation center located on the axial extension line of the insertion hole. The cutting edge of the cutter is provided protrudingly on the opposing surface of the cutter support plate, and the inner end located at the center of the cutter support plate is positioned closer to the outer end located at the outer periphery of the cutter support plate. We adopted a configuration that tilts it so that it is positioned forward.

Here, the cutter has a conical surface with a high center on the opposite surface of the cutter support plate that supports the cutter,
The cutting edge of the cutter may be mounted to protrude uniformly over the entire length of the cutting edge from the conical surface, or the opposing surface of the cutting supporting plate may be a flat surface, and the cutting edge of the cutting blade may be inclined with respect to that plane. It may be installed as follows.

[Effect]

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 at a fixed position while pushing the material in the axial direction, the inclined cutting edge of the cutter causes The tip of the material can be cut into a tapered shape at a position facing the tip. In the cutting state, by rotating the rotary disk, the cutting position relative to the material changes in the circumferential direction of the material. Therefore, by rotating the pair of cutter support plates and the rotary disk, 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.

[Examples]

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

As shown in FIGS. 1 to 3, the 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 about the axial extension of the insertion hole 3, and is driven by a drive device (not shown) as shown in FIG. is rotated in the direction of the arrow.
A pair of cutter devices 1 are provided on the front surface of the rotary disk 4.
0 and 10 are provided.

The cutter device 10 has an L-shaped bracket 11 fixed to the front surface of the rotary disk 4.
A bearing 12 and a motor 14 for rotationally driving a rotating shaft 13 supported by the bearing 12 are attached to the bearing 12 .

Although power supply to the motor 14 is omitted in the illustration, a plurality of annular conductors are attached to the back surface of the rotary disk 4, and a power supply is brought into contact with each of the conductors, and the conductors and the motor are connected by a cord.

Further, a circular cutter support plate 15 is attached to the inner end of the rotary shaft 13 located in the center of the rotary disk 4, and a plurality of cutter support pieces 1 are attached to the back of the cutter support plate 15.
6 are provided at equal intervals, and the cutting edge 18 of the cutter 17 screwed to the cutter support piece 16 is inserted into the cutter support plate 15 through the guide hole 19 formed in the cutter support plate 15.
(See Figures 4 to 6). Here, the front surface of the cutter support plate 15 becomes a conical surface 20 that is higher at the center, and the conical surface 20
The cutting edge 18 of the cutter 17 protrudes from the cutter 17, and its protruding length is uniform over the entire length of the cutting edge 18 of the cutter 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 the direction passing through the center of the cutter support plate 15 .

A pair of cutter devices 10, 1 having the above configuration
0 are arranged point-symmetrically around the center of the rotary disk 4 at an interval of 180 degrees, and a pair of cutter support plates 15
A dimensional shift approximately corresponding to the radius of the cutter support plate 15 is provided between the center lines of the cutter support plate 15 . Also,
Mutually opposing conical surfaces 2 of a pair of cutter support plates 15
A space is formed between the holes 0 and 10 into which the tip of the material B can be inserted, and the space gradually becomes smaller in the direction in which the material B is inserted.

Between the pair of cutter support plates 15 mentioned above, the material B
A stopper 21 is arranged to limit the insertion amount, and support pieces 2 connected to both ends of the stopper 21 are arranged.
2 is supported by a rotary disk 4.

Now, while the rotary disk 4 is stopped, insert the rectangular rod-shaped material B into the insertion hole 3 of the guide member 1, and insert the tip of the material B into the pair of cutter support plates 1.
A pair of cutter devices 1
When the cutter support plates 15 of 0 and 10 are rotated in opposite directions by the drive of the motor 14, opposing positions (both side surfaces) at the tip of the material B are cut by the cutter 17. At this time, the cutter support plate 15
The conical surface 20 of is inclined with respect to the side surface of the material B,
The cutting edge 18 of the cutter 17 is placed against the conical surface 20.
is uniformly protruding over the entire length, so material B
Both sides can be cut into a tapered shape.

In the above cutting state, when the rotary disk 4 is rotated, the pair of cutter devices 10 revolve around the material B, so the cutting position of the cutter 17 is
Material B changes in the circumferential direction. Therefore, with the rotary disk 4 and the pair of cutter support plates 15 rotated, the material is inserted into the insertion hole 3 of the guide member 1, and the material B is pushed between the pair of cutter support plates 15. Tapered shaft a at the tip of 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 inclination of the cutting edge 18 of the cutter 17 By appropriately determining the angle, 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. 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 applied to the cutter during cutting.

In addition, although the opposing surfaces of the pair of cutter support plates 15 are made into conical surfaces 20 whose center portions are higher, the opposing surfaces of the cutter support plates 15 are made into mutually parallel planes, and the cutting edge 18 of the cutter 17 is made to protrude from the plane. , the cutting edge 18 may be inclined so that the inner end located at the center of the cutter support plate 15 protrudes from the outer end.

〔effect〕

As described above, according to the present invention, with the pair of cutter support plates rotated in opposite directions and the rotary disk rotated in one direction, the square rod-shaped material is inserted into the square insertion hole of the guide member. , a tapered shaft can be cut into the tip of a rod-shaped material, and the tapered shaft can be formed extremely efficiently.

In addition, the pair of cutter support plates are located at opposite positions of the rod-shaped material, and the resistance when the cutter of one cutter support plate cuts the rod-shaped material can be received by the other cutter support plate, so even thin and soft rod-shaped materials can be cut. , it is possible to reliably cut the rod-shaped material without breaking it.

[Brief explanation of drawings]

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, FIG. 3 is a partially cutaway plan view of the same, and FIG.
The figure is a front view of the same cutter support plate, and Figure 5 is the 4th one.
FIG. 6 is a sectional view taken along line V--V in the figure, FIG. 6 is a sectional view taken along line - in FIG. 4, and FIG. 7 is a perspective view of a single chopstick with a tapered shaft. DESCRIPTION OF SYMBOLS 1...Guide member, 3...Insertion hole, 15...Cut support plate, 17...Cut, 18...Blade tip, 2
0...Conical surface.

Claims (1)

[Scope of Claims] 1. A guide member having a rectangular insertion hole, and a pair of cutter support plates arranged at a distance such that the tip of a rectangular rod-shaped material can be inserted into the insertion hole of the guide member. , a pair of cutter support plates, and a rotary disk that supports a motor for driving the cutter support plates and is rotated in one direction with its rotation center located on the axial extension line of the insertion hole, and the cutter support plate Protrude the cutting edge of the cutter on the opposite side of the board,
A cutting device for tapered shaft machining whose cutting 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. 2. The opposing surface of the cutter support plate is a conical surface with a higher 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 processing according to item 1.