JPH0333384Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a cutting machine for cutting curved surfaces such as the outer periphery of a pipe.

As shown in Japanese Unexamined Patent Publication No. 53-91484, conventional cutting machines have a flat base, and when cutting pipes or uneven materials, the cutting part has a curved surface, so the base of the cutting machine has a flat plate. In many cases, contact was not made properly, and the cutting was unstable.

For this reason, when cutting a curved surface, the operator must be very careful to avoid injury and to ensure that the cut is straight.

In particular, pipe cutting cannot be done at once unless the effective length of the cutting blade is larger than the diameter of the pipe. Since it does not come into close contact with the circumferential surface of the pipe, it tends to swing left and right in the cutting direction, resulting in problems such as the start and end of the cut not being aligned.

Also, if the cutting machine is fixed and the pipe can be rotated, it can be cut relatively well, but if the pipe is fixed and the worker operates the cutting machine by hand, the cutting will not be successful unless the worker is very skilled. Can not.

Further, even if the operator is actually skilled, there is a limit to how well the operator can cut the blade under such conditions, and there is also the problem that it is dangerous.

In particular, the base is provided so that the entire surface of the base is in close contact with the object to be cut so that it can be safely cut, so if the base does not come into perfect contact with the object, the original performance of the base will be impaired and the base will not work effectively.

Therefore, safe running operation during cutting cannot be relied on the base and is left entirely in the hands of the operator, resulting in an unstable situation, which is a major problem in terms of labor safety.

The present invention has been developed in view of the above circumstances, and an object of the present invention is to provide a cutting machine that can safely and easily cut non-planar parts such as pipes.

Hereinafter, the present invention will be explained based on an embodiment shown in the drawings. FIG. 1 is a side view showing an embodiment of the cutting machine according to the present invention, and FIG.
It is a bottom view of the main part.

In FIG. 1, the cutting machine is provided with a cover 2 to cover a rotary blade 1, and the cover 2 is provided with a handle 3.

An electric motor 15 is integrally provided on the back surface of the cover 2 of the rotary blade 1 and is configured to rotate the rotary blade 1 at high speed.

Further, the rotary blade 1 is configured such that its lower side is exposed from the base 4 to the bottom, and the base 4 is divided into front and rear directions near the axis of the rotary blade 1, and is divided into a front base 4a and a rear base 4b. A motor 15 is connected to the front base 4a through the cover 2.
, cover 2, etc. are integrally constructed to form the main body portion 16.

Further, the base 4 is configured such that the front base 4a and the rear base b are bent into a dogleg shape by the shaft attachment part 5, so that the rear base 4b can swing arbitrarily.

The rear base 4b of the base 4 is configured such that its rear side 6 can be fixed to the main body part 16 in any position using a fixing arm 8 and a butterfly bolt 9, and the cover 2, base 4, and electric motor 15 are In order to integrate the main body part 16, the cover 2 is attached on the front side 7.
and the front base 4a are integrated.

A fixed arm 8 provided on the rear side 6
is curved, allowing the rear base 4b to bend and swing, and is configured so that it can be fixed to an integral part with the cover 2 with butterfly bolts 9 so that any desired posture can be maintained. There is.

Furthermore, rollers 1 are provided at both the front and rear ends of the base 4.
0 and 11 are provided.

Further, 12 is a pipe for cutting material.

FIG. 2 shows the rollers 10, 1 shown from the bottom.
1 is a diagram of main parts showing a state of roller 10,
11 are arranged at both the front and rear ends of the base 4,
It is configured to come into contact with the material to be cut, such as the pipe 12, and roll.

The rollers 10 provided on the front side 7 of the base 4 are inclined inwardly with respect to the line 14 indicating the cutting direction, that is, the toe-in 13 in which the rollers 10 are respectively inclined inwardly toward the front. It is formed.

In such a configuration, the cutting machine cuts the pipe 1
Place the roller 10 of the front part 7 of the base 4 on the part to be cut in 2, and cut the pipe 1 with the rotary blade 1.
Cut 2.

When the rotary blade 1 cuts into the pipe 12, the roller 11 at the rear part 6 of the base 4 comes into contact with the pipe 12, and the front and rear rollers 10, 11 come into contact with the pipe 4.

Therefore, the cutting machine is stably held by the four rollers 10 and 11 along the outer peripheral surface of the pipe 12, and the pipe 12 can be smoothly cut by pushing the handle 3 in the cutting direction. can.

Further, when the cutting progresses along the outer circumference of the pipe 12, the toe-in is formed on the roller 10 of the front part 7, which improves the straightness of the cutting machine, making it possible to easily cut the pipe 12. .

In other words, the toe-in of a roller is similar to the case of the running wheels of a car. When an external force is applied to the left and right rollers, causing a force to move them from side to side, a large force in the opposite direction is applied to the other roller due to the vector difference, causing the roller to move. This has the effect of controlling the flow rate, which is convenient for maintaining straightness.

In addition, the cutting machine has good straightness in the cutting direction, that is, the circumferential direction, and is stable because the base 4 can be bent at the shaft attachment part 5 near the axis and placed along the outer periphery of the pipe 12.

This means that the conventional planar base can be
Compared to contacting the outer peripheral surface of the pipe 12, the effect is extremely large.
The cutting surface tends to swing back and forth and left and right, making it impossible to cut straight and also being dangerous for the operator, but this danger can now be avoided.

Rollers 10 and 1 provided at both front and rear ends of the base 4
1 is not necessarily necessary, and if the sliding resistance of the base 4 can be large, the roller 1
0 and 11 are unnecessary.

Therefore, the rollers 10, 11 are suitable for a relatively large cutting machine, and the rollers 10, 11 are suitable for a small cutting machine.
Cutting work can be done without 11.

Of course, it is not necessary to deny the rollers 10 and 11 to a small-sized cutting machine, and a small, lightweight roller may be provided, and the rollers 10 and 11 may be configured to be detachable.

The bending angle of the base 4 can be arbitrarily adjusted with respect to the diameter of the pipe 12, and thereby the amount of exposure of the rotary blade 1 from the base 4 can also be adjusted.

By using such an adjustment mechanism of the base 4, it is possible to easily cut not only the pipe 12 but also those having curved cutting surfaces.
Moreover, it has the effect of allowing stable work to be carried out, and is therefore of extremely great practical value.

Such a cutting machine can be used with various materials depending on the properties of the rotary blade 1, and can easily cut pipe materials from plastic to concrete, as well as items with uneven or curved surfaces, as well as flat plate-like materials. It allows safe cutting depending on the cutting surface.

As explained above, according to the present invention, it is possible to easily and stably cut materials such as pipes whose cut surfaces are not flat, and even when cutting along the outer circumference of a pipe, it is easy to start and end the cut. This is of great practical value to workers.

[Brief explanation of the drawing]

FIG. 1 is a side view showing an embodiment of a cutting machine according to the present invention, and FIG. 2 is a bottom view of the main parts thereof. 1... Rotating blade, 4... Base, 5... Shaft attachment part, 10,
11...Roller, 12...Pipe, 15...Electric motor,
16...Main body.

Claims (1)

[Claims for Utility Model Registration] (1) A cutting machine having a structure that includes a main body having an electric motor on a base, a rotary blade is connected to the electric motor, and a part of the rotary blade is exposed below the base, The base is divided into a front base and a rear base near the axis of the rotary blade, the front base and the main body are integrated, and the divided front base and rear base are pivoted at the divided part. A cutting machine characterized in that the rear base is bent in a dogleg shape and swings, and the rear base is configured to be fixed to the main body in any position. (2) The cutting machine according to claim 1, characterized in that rollers are provided at both front and rear ends of the base. (3) The cutting machine according to claim 1 or 2, characterized in that two rollers are disposed at the front and rear, and a toe-in is formed on the front roller.