JPS6124161B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an assembly type cutter unit that can continuously cut a material to be cut in any direction.

Traditionally, band saws, scroll saws, hacksaws, circular saws, etc. are known, but all of these saws have the disadvantage that they cannot cut in any direction and continuously change direction. Ta. For example, even a scroll saw, which has a relatively large degree of freedom in cutting continuously in any direction, is constrained by its width and can change direction from the previous cutting direction to a direction perpendicular to it to continue cutting. I couldn't move forward. band saw,
Hacksaws, circular saws, etc. had even less freedom to change direction, and had almost no freedom other than cutting in a straight line.

The present invention overcomes the above-mentioned drawbacks and provides a unit for constructing a prefabricated cutter that can continuously change direction and cut in almost all directions on a plane.

That is, the prefabricated cutter unit of the present invention has a body part 1 having a blade 2 on the peripheral edge of one end, and an engaging hand 3 on either the top or bottom of this body part for connecting to another unit. It has a locking part 4 on the other side for receiving the detachable connection of another unit, and a drive that enables the ring-shaped connecting body of the unit to be used as a rotating cutter via an external driving force. The unit has a force receiving part, and the tip of the blade forms the maximum diameter part of the unit, and the units can be connected to each other using only the unit. The connecting portion has a degree of freedom in bending so that the connecting body in which the engaging hands are successively connected can move along the outer periphery of the rotating disk.

Next, the present invention will be explained based on the drawings.

The unit in the embodiment shown in FIG. 1 includes a cylindrical body 1 having a shoulder 5 as a driving force receiving part, a triangular wave-shaped blade 2 cut on the lower peripheral edge of the body, and a blade 2 on the upper surface of the body. It consists of a hook 3 fixed to the center and a ring body 4 fixed to the center of the bottom of the trunk. The total length of this unit is approximately 8 mm, and the diameter of the body is 3 mm.

In this embodiment, the units are connected by locking the hooks of other units into the holes in the ring body. In the locked state, the connecting portions of each unit have flexibility in bending, as shown in FIG. 2, so that they can move along the outer periphery of the rotating disk 11. In this way, in the unit of the present invention, each connecting part has a degree of freedom in bending in the connected state, so the units can be connected one after another to form a ring-shaped connected body, and the driving force receiving part of the unit can be connected. By providing a driving force for rotating the linkage through the holder, the linkage can also be used as a rotary cutter for strips in a contour machine. The rotation of the ring-shaped connecting body of the unit in the above embodiment is achieved by, for example, using a rotary plate 12 as shown in FIG. It can be done by Further, in the unit of the present invention, since the tip of the blade forms the maximum diameter part of the unit as in the above embodiment, other parts of the unit do not get stuck in the material to be cut and interfere with the cutting process. In addition, since the blade in the unit of the embodiment has an uneven shape, chips during cutting are dissipated from the concave portion, and has the advantage that chips are less likely to accumulate on the inside of the blade.

FIG. 3 shows another embodiment. This unit is
A truncated conical body 1, a sinusoidal blade 2 provided on the periphery of the maximum diameter part of the bottom, a disc-shaped shoulder 5 as a driving force receiving part provided on the upper side of the body, and a shoulder. It consists of an engaging hand 3 fixed to the center of the upper surface of the body, and a locking part 4 drilled in the bottom of the body. Engagement hand 3
has a hemispherical head 6 curved toward the body at its upper end.
As shown in FIG. 4, this head part has a joint part 7 which is a spherical part with a larger semi-radius of curvature. This joint is for preventing the unit from freely rotating freely around the longitudinal direction when connected to another unit, and for restricting the rotation within a predetermined range. On the other hand, the locking portion of this unit consists of a hole. The hole is
Guide part 8 from the outer periphery to the center of the body
and a holding portion 9 (FIG. 5) at the center. This holding part locks the head of the engaging hand in another unit to connect the units, and the part of the holding part that corresponds to the head of the engaging hand corresponds to The hole is deeper than the main part, creating a pit hole condition, and although the connection of the unit via the engaging hand 3 and the locking part 4 is removable, the connection state cannot be easily unraveled. It's summery. Further, in order to provide flexibility in bending in the connected state, the space of the holding portion is slightly larger than the head to be locked. Further, the portion 10 of the holding portion corresponding to the head joint is provided at a predetermined angle (approximately 10 degrees) shifted from the head joint 7 of the same unit, so that the corresponding blade between the upper and lower units is can be connected with each other shifted by a predetermined angle. This prevents the upper and lower blades of the connecting body from hitting the material to be cut in the same state, and there is no difference in which direction is easier to cut and which is harder to cut.
The cutting speed in all directions can be made uniform, making it possible to cut smoothly and making the width of the cutting line uniform. The unit in this example has an overall length of 9 mm and a diameter of 4 mm at the tip of the blade, which is the maximum diameter. Also, this unit
Since the blade is flared at the end, it has the advantage that chips are less likely to accumulate at the bottom. Incidentally, the rotational transfer of the ring-shaped connecting body of this unit can be carried out using, for example, a rotary plate 12 having a claw portion 13 as shown in FIG.
This can be done by using, for example.

FIG. 6 shows yet another embodiment. This unit consists of a truncated conical body 1, a sinusoidal blade 2 cut at the maximum diameter of the bottom, an engaging hand 3 fixed to the center of the bottom, and a hole drilled at the top of the body. It consists of a locking part 4 provided. The engaging hand 3 has a head 6 at its lower end, and has a disc body 5' serving as a driving force receiving portion above the head. The head has a half-disc shape that curves toward the blade. This unit has a total length of 9 mm and a diameter of 4 mm at the tip of the blade, which is the maximum diameter. Engagement hand 3 and locking part 4 of unit
The degree of freedom of bending of the connecting part of each unit in the connected state, the deviation of the corresponding blades by a predetermined angle between the upper and lower units, and the guide part 8 of the hole forming the locking part. The pitfall condition due to the step difference between the holding part 9 and the holding part 9, the rotational transfer method of the ring-shaped connecting body of the unit, etc. are the same as in the case of the second embodiment described above. Unrestricted free rotation about the longitudinal direction in the connected state of the unit is restricted by the head of the engaging hand and both side surfaces of the half-disc shaped portion of the holding portion of the hole that locks the engaging hand. In this unit, when the disc body 5' is in the connected state, it is located directly above the locking part of the lower unit, making it difficult for chips to enter the locking part. This has the advantage of not creating a notch due to a locking part etc. in the blade part.

In addition, when connecting the units of the present invention, a coil spring with appropriate elasticity is interposed between the engaging hand and the locking part to prevent the connection from coming undone due to the force applied to the connecting part at the time of cutting. You may. Further, the body in the present invention may be a circular body, a polygonal body, or the like. Further, the blade of the body may be uneven as in the embodiment, or may be smooth like a knife blade, but is not limited thereto.

The units of the present invention can be connected in a ring shape and used as a rotating cutter like a belt in a contour machine, or connected in a straight line and held on a suitable support to be used like a bow. You can also do that.

In addition, each unit of the cutter obtained by connecting the pieces as desired has a blade on the periphery of the body, so it can continuously change direction and cut in any direction, allowing for efficient cutting work. enable.

Furthermore, since the units in the cutter are connected in a removable manner through a simple engagement method that does not use pins, screws, etc. between the engaging hand and the locking part of the unit itself, it is easy to replace a malfunctioning unit. Unlike band saws, there is no need to discard the entire cutter due to partial failure, and cutting operations using the pilot hole method can be easily performed.

[Brief explanation of the drawing]

Fig. 1 is a side view showing an embodiment of the present invention, Fig. 2 is a schematic diagram for explaining the degree of freedom of bending of the connecting portion of the unit in the above embodiment, and Fig. 3 is a side view of another embodiment. , FIG. 4 is a plan view of the head of the engaging hand, FIG. 5 is a longitudinal sectional view thereof, and FIG. 6 is a side view of another embodiment. 1: Body, 2: Blade, 3: Engagement hand, 4: Locking part,
5: Shoulder part (driving force receiving part), 5': Disc body (driving force receiving part), 6: Head of engaging hand.

Claims (1)

[Claims] 1 A body 1 having a blade 2 on the peripheral edge of one end, an engaging hand 3 on one of the top or bottom of this body for connecting to another unit, and the other side receiving detachable connection of another unit. and a driving force receiving part to enable the ring-shaped connecting body of the unit to be used as a rotating cutter via an external driving force, and the tip of the blade is connected to the unit. In addition to forming the maximum diameter part, the units can be connected to each other using only the unit, and a connecting body in which the engaging hand is sequentially connected to the locking part of another unit is attached along the outer periphery of the rotating disk. A prefabricated cutter unit characterized in that its connecting portion has a bending degree of freedom that allows the cutter unit to move.