JP2004345039A - Portable cutting machine - Google Patents

Abstract

An object of the present invention is to irradiate a laser beam for inking on a virtual straight line translated in a horizontal direction from an actual cutting line by a portable cutting machine, thereby reducing the influence of cutting dust generated from a rotary blade. An object of the present invention is to provide a portable cutting machine capable of performing a cutting operation with good operability along a marking line without receiving.
A light irradiation device (7) for irradiating one or more points of a marking laser beam (11) or a straight marking laser beam (11) on a line parallel to a cutting direction extension line (9) of a rotary blade (2).
[Selection diagram] Fig. 1

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a portable cutting machine equipped with a light beam irradiation device capable of irradiating a laser beam for blackout.
[0002]
[Prior art]
The outer peripheral part and the side part of the rotary blade 2 rotated by the motor 1 are used for cutting work in order to prevent an operator from accidentally contacting the rotary blade 2 and to prevent scattering of dust generated during cutting. Except for a necessary exposed portion of the rotary blade 2 and an opening required for replacement of the rotary blade 2, it is covered with a foil guard 3. A base 4 is provided near the exposed portion of the rotary blade 2 required for cutting work at the open portion of the wheel guard 3. The base 4 is locked to the wheel guard 3 with a screw a5 so that the amount of protrusion of the rotary blade 2 from the base 4 can be varied. A cutting operation can be performed while keeping the cutting depth (dimension of arrow C) constant.
[0003]
The operator pushes the rotary blade 2 into the workpiece 6 until the bottom surface of the base 4 abuts against the upper surface of the workpiece 6, and the same direction (arrow F direction) as the rotating direction of the rotary blade 2 (arrow E direction). Press the portable cutting machine toward to perform cutting work. When cutting is performed while pushing in such a direction (the direction of arrow F), the rotary blade 2 easily bites into the material 6 to be cut, and the cutting operation is easy. Actually, when a worker performs a cutting operation using a portable cutting machine, as shown in FIG. 6, a marking line 14 is drawn on the workpiece 6, and the cutting edge of the rotary blade 2 is aligned with the marking line 14. It is common to perform a cutting operation. As shown in FIG. 4, the cutting dust 13 of the workpiece 6 generated when the workpiece 6 is cut by the rotary blade 2 is rotated from a position where the rotary blade 2 is opened from the inside of the workpiece 6 to the space. It scatters in the circumferential tangent direction of the blade 2 by inertia force. Therefore, when the cutting operation is performed while pressing the portable cutting machine in the same direction (the direction of the arrow F) as the rotation direction of the rotary blade 2 (the direction of the arrow E), the cutting dust 13 is drawn on the workpiece 6. It will scatter in the space between the marking line 14 and the eyes 15 of the worker. When the work is performed in such a state, there is a problem that the marking line 14 is difficult to see, and the scattered dust 13 accumulates on the material 6 to be cut, so that the marking line 14 becomes more difficult to see. Some workers do not want to make the marking line 14 difficult to see, and perform cutting work by pulling the portable cutting machine in the direction (arrow G direction) opposite to the rotation direction of the rotary blade 2 (arrow E direction). When cutting is performed while pulling in such a direction (the direction of arrow G), the cutting dust 13 generated from the rotary blade 2 is scattered in a direction opposite to the direction in which the cutting machine is drawn, so that there is an advantage that the crevices line 14 can be seen well. However, if the cutting operation is performed in the direction (arrow G direction) opposite to the rotation direction of the rotary blade 2 (direction of arrow E), the rotary blade 2 is less likely to bite into the material 6 to be cut, and the cutting machine is easily lifted, so that operability is improved. There was a problem of getting worse.
[Patent Document 1]
JP-A-2003-80418
[Problems to be solved by the invention]
In order to perform the cutting work according to the marking line, it is essential that the rotary blade and the marking line are aligned at the time of cutting work. Since it scatters from the position where it is opened to the space by the inertial force in the tangential direction of the circumference of the rotary blade, if the cutting operation is performed in the same direction as the rotation direction of the rotary blade, it will be difficult to see the marking line due to cutting dust. There was a problem. In addition, if the cutting operation is performed in the direction opposite to the rotation direction of the rotary blade, the cutting dust does not scatter on the marking line, so there is an advantage that the marking line can be seen well, but since the rotating blade is advanced in the opposite direction to the rotation direction. In addition, there is a problem that the rotary blade is less likely to bite into the material to be cut and the cutting workability is deteriorated.
[0005]
An object of the present invention is to solve the above-mentioned problem, and to easily perform a cutting operation in accordance with a cutting mark such as a marking line drawn on a material to be cut, and to perform cutting in a direction in which a rotary blade bites into the material to be cut. The object of the present invention is to provide a tool with good workability.
[0006]
[Means for Solving the Problems]
The above-described object is to irradiate a laser beam for inking which is irradiated from a light beam irradiation device mounted on a portable cutting machine to a position moved in parallel from an actual cutting extension line and drawn in parallel with the actual cutting line. This is achieved by performing cutting in accordance with a cutting mark such as a marking line.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
One embodiment of the present invention will be described with reference to FIGS.
[0008]
An outer peripheral portion and a side surface portion of the rotary blade 2 rotated by the motor 1 are covered with a wheel guard 3 except for an exposed portion of the rotary blade 2 required for cutting work and an opening required for replacement of the rotary blade 2. A base 4 is provided near the exposed portion of the rotary blade 2 required for cutting work at the open portion of the wheel guard 3. The base 4 is locked to the wheel guard 3 with a screw a5 so that the amount of protrusion of the rotary blade 2 from the base 4 (dimension of arrow C) can be changed. The amount of protrusion of the blade 2 can be adjusted, and the amount of protrusion can be fixed by fixing the screw a5. Therefore, a cutting operation can be performed on the workpiece 6 with a constant cutting depth.
[0009]
The base 4 is provided with a base foot 8 for fixing a light beam irradiating device 7. The light beam irradiating device 7 cuts the rotary blade 2 on a plane substantially parallel to the contact surface between the workpiece 6 and the base 4. Arrangement is made such that two or more ink-marking laser beams 11 (or continuous straight lines) are irradiated on a virtual straight line 10 parallel to the direction extension line 9.
[0010]
Further, the beam irradiation device 7 is rotatable with respect to the base foot 8 by the screw b12 so that the distance (D dimension) on the virtual straight line 10 parallel to the cutting direction extension line 9 of the rotary blade 2 can be adjusted. Fixed. The screw b12 is disposed so as to extend substantially parallel to the extension line 9 in the cutting direction of the rotary blade 2, and the light beam irradiation device 7 is rotatable around the screw b12 as a fulcrum.
[0011]
Accordingly, when the marking line 14 is drawn while being shifted in the horizontal direction, or when it is desired to cut the marking line 14 in parallel with a straight line portion such as the end surface of the workpiece 6, the marking-out laser beam 11 Can be cut along the straight line 9 which is originally desired to be cut.
[0012]
【The invention's effect】
According to the present invention, the cutting operation can be performed by adjusting the marking laser beam emitted from the light beam irradiation device to a marking line or the like at a position deviated from the extension of the cutting direction of the rotary blade. The marking line is not made difficult to see due to the scattering of the cutting dust of the cut material generated when cutting the cut material. Therefore, the cutting operation can be performed while pushing the portable cutting machine in the same direction as the rotation direction of the rotary blade, so that a portable electric cutting tool with good workability, in which the rotary blade easily bites into the material to be cut, can be provided. Become like
[Brief description of the drawings]
FIG. 1 is a front view showing an embodiment of a portable cutting machine of the present invention.
FIG. 2 is a right side view of FIG. 1 including a partial cross-sectional view.
FIG. 3 is a top view of FIG. 1 including a partial cross-sectional view.
FIG. 4 is a front view showing an example of a conventional portable cutting machine.
FIG. 5 is a right side view of FIG. 4 including a partial cross-sectional view.
FIG. 6 is a top view of FIG. 1 including a partial cross-sectional view.
[Explanation of symbols]
1 is a motor, 2 is a rotary blade, 3 is a wheel guard, 4 is a base, 6 is a material to be cut, 7 is a light beam irradiation device, and 11 is a laser beam.

Claims (3)

A rotary blade that is rotated by a motor, a foil guard that covers the rotary blade, and a base that guides the rotary blade when cutting the workpiece is movably locked to the wheel guard to cut into the workpiece. In a portable cutting machine having a cutting adjustment mechanism for arbitrarily adjusting the depth, a point substantially on a straight line parallel to an extension line of a cutting direction of a rotary blade with respect to a plane substantially parallel to a contact surface between a workpiece and a base. A portable cutting machine comprising a light beam irradiation device for irradiating two or more laser beams. 2. The portable cutting machine according to claim 1, wherein the light beam irradiation device is rotatable around a rotation axis extending in parallel with an extension of the cutting direction of the rotary blade. 3. The portable cutting machine according to claim 1, wherein the light beam irradiation device is provided on the base.

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