JP2002046084A - Laser apparatus for marking power tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate the operation of aligning a marking line on a member to be ground with a laser beam in a working environment where illumination is low. SOLUTION: Polarizing devices 26b and 26d for splitting a laser beam from one laser beam source 26a into laser beams L1 and L2 along two axes in approximately the same direction are provided inside a marking laser apparatus 26. For the optical axis of the laser beam on one of the axes, a convex lens 26c is provided to focus this laser beam onto a material 35 to be ground, while the optical axis of the laser beam on the other of the axes is provided to diffuse the laser beam toward the material 35 to be ground.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power tool having a built-in laser device for aligning a tip blade with a black line drawn on a work material.

[0002]

2. Description of the Related Art A power tool having a built-in laser device for aligning a tip blade with a black line drawn on a work material is used in a wood processing machine such as a desktop cutting machine and a band saw machine. . The laser device emits laser light by focusing on a position where a tip blade on a work material to be cut by a power tool hits. This is a very convenient device because an operator can perform accurate cutting by aligning the laser beam with a black line drawn in advance at a position where cutting is desired. The line width of the laser beam for inking is generally directed to a work material at a focus of 1 mm or less. The part irradiated with the laser beam looks good regardless of the illuminance of the room in the working environment, but it is a light source with strong directivity and the irradiation width may be as narrow as 1 mm or less. Or could not illuminate around the line. As described above, when the illuminance of the work environment is reduced, such as at an indoor building site on a cloudy day, the black line drawn on the work material becomes difficult to see. As a result, in a relatively dark working environment, it was difficult to match the black line drawn on the work material with the laser beam. Conventionally, in such a work environment, it was common to install indoor work lights toward electric tools and work materials, but recently, in order to reduce the troublesome work light installation, small work Power tools with built-in lamps are becoming common.

[0003]

The power tool provided with a work light has an advantage that even in a relatively dark work environment as described above, the black line can be easily adjusted without specially preparing a separate work light. However, since both the laser marking device and the working lamp are built in, the power tool itself becomes expensive and the power tool becomes large.

[0004] An object of the present invention is to solve the above-mentioned problems and to facilitate the operation of matching a black line drawn on a work material with a laser beam.

[0005]

SUMMARY OF THE INVENTION The object of the present invention is to provide a polarizing device which divides a laser beam into two axes in substantially the same direction inside a laser device, and focuses on a workpiece only on one laser optical axis. This is achieved by providing a convex lens to be combined and irradiating the laser light of the other axis directly to the work material. Alternatively, this is achieved by providing a cylindrical lens for linearly forming a laser beam on a work material on the one-axis laser optical axis and irradiating the work material with the laser beam of the other axis as it is. . Alternatively, it is achieved by providing a concave lens for diffusing the laser light on the laser optical axis of the other axis. It is further achieved by providing a convex lens on the laser beam axis of the other axis for irradiating the workpiece with defocus.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. 1 to 4, FIG. 9, and FIG. 10 in which a power tool is applied to a desk circular saw. In the figure, a turntable 2 is embedded in the center of a base 1 so as to be rotatable in the horizontal direction, and the upper surface of the turntable 2 is flush with the upper surface of the base 1. A work material 35 such as wood is placed on the upper surfaces of the base 1 and the turntable 2. In the present invention, the base portion is a member on which the work material 35 is placed, and in the present embodiment, the base 1 and the turntable 2 correspond to the base portion. A fence 3 that supports the side surface of the work 35 is fixed to the upper surface of the base 1. Holder shaft 4 at the rear end of the turntable 2
The holder 5 is erected through the shaft, and the axis of the holder shaft 4 is positioned so as to substantially coincide with the upper surface of the turntable 2, so that the holder 5 is supported by the holder shaft 4 and centered on the upper surface of the turntable 2. It is supported to be able to tilt left and right.

As shown in FIG. 9, a long hole 5a centering on the holder shaft 4 is formed at the rear of the holder 5, and the clamp lever 6 is inserted through the long hole 5a.
The threaded portion formed at the tip of is screwed into the threaded hole formed on the back of the turntable 2. When the clamp lever 6 is loosened, the holder 5 is
When the clamp lever 6 is tightened by tilting within the range of a, the holder 5 is tightened between the turntable 2 and the clamp lever 6 and fixed at an arbitrary position. In addition, slot 5
“a” is formed within a range in which the holder 5 can be tilted by 45 degrees left and right.

A cutting blade 8 is supported above the holder 5 via a shaft 7 so as to be vertically swingable with respect to the upper surface of the base 1. A spring 9 for urging the cutting blade 8 upward is provided between the holder 5 and the cutting blade 8.

The cutting blade 8 rotates the cutting blade shaft 16, the cutting blade (tip blade) 10, the gear case 12 integrated with the saw cover 11 that covers the upper half of the cutting blade 10, and the cutting blade 10. The motor 13, a motor shaft 14 of the motor 13, a transmission belt 23, a motor housing 15 that covers and supports the motor 13 and the motor shaft 14, a handle 29, and the like.

In FIG. 10, a cutting blade shaft 16 is provided below the gear case 12 in a horizontal direction, and the cutting blade shaft 16 is rotatably supported by bearings 17 and 18. A pulley 20 for fixing the cutting blade 10 and transmitting power to the cutting blade shaft 16 is provided.
A motor housing 15 is provided above the gear case 12, and a motor 13 for rotating and driving the cutting blade 10 is provided therein.
Is provided. At the end of the motor shaft 14 of the motor 13 rotatably supported by the bearing 21, a pulley 22 is provided so as to be located above the pulley 20. A transmission belt 23 is stretched between the pulleys 20 and 22.
The power of the motor 13 is transmitted from the motor shaft 14 to the pulley 22, the transmission belt 23, the pulley 20,
It is transmitted to the cutting blade 10 via the cutting blade shaft 16.

In FIG. 2, a V-shaped protrusion 5b is formed on the front surface of the holder 5, and stopper bolts 24, 25 are provided on the rear surface of the turntable 2 so as to be located on the movement locus of the protrusion 5b. Screwed in right angle direction. When the holder 5 is inclined, the projection 5b engages with the head of the stopper bolt 24 or the stopper bolt 25 at a predetermined inclination angle, and sets the inclination position of the cutting blade 8. Usually, the stopper bolts 24 and 25 are provided so as to engage with the protrusions 5b when the holder 5 is inclined at a position of 45 degrees in the left-right direction.

On the upper surface of the turntable 2, a blade plate (not shown) having a groove at the center into which the cutting blade 10 penetrates is fixed, and when cutting the work material 35, the lower end of the cutting blade 10 is positioned above the turntable 2 upper surface. When it also descends, it penetrates into the groove of the blade plate, and serves to prevent the work material 35 from fuzzing on the finished surface.

Further, a holder 27 of an ink-marking laser device 26 is fixed to the front surface of the holder 5, and the ink-marking laser device 26 is inserted into the holder 27. Although not shown in the blackout laser device 26, the device is provided with a switch for turning on and off the laser beam. When the cutting blade 8 is at the upper limit position, the laser beam L1 emitted from the blackout laser device 26 is set to be focused on the workpiece 35 so as to indicate the cutting position of the cutting blade 10, Irradiated. Similarly, the laser beam L2 is set so as to illuminate the entire upper surface of the work material 35, and is irradiated. When the work of matching the black line 36 drawn on the work material 35 with the laser beam L1 is performed when the cutting blade 8 is at the upper limit position, the laser beams L1 and L2 are transmitted from the cutting edge 10a of the cutting blade 10 at this time. Also passes below, so that the cutting blade 10 is not obstructed by the irradiation of the laser beam. As shown in FIG. 3, a black line 36 indicating the cutting position is written on the upper surface of the work material 35, and the work material 35 is moved right and left (in the direction of arrow B in the figure) so that the black line 36 coincides with the laser beam L1. Thereby, the cutting edge 10a of the cutting blade 10 and the black line 3
6 matches.

In FIG. 4, the laser device 26 is provided with a laser light source 26a and a half mirror 26b in front of the laser light source 26a.
Then, the laser beam L2, which refracts the optical axis approximately 90 degrees upward, is branched into two axes. A convex lens 26c is provided in front of the half mirror 26b to focus the laser beam L1 on the workpiece 35. A reflection mirror 26d is provided above the half mirror 26b so that the irradiation position of the laser beam L2 on the workpiece 35 is adjusted to the irradiation position of the laser beam L1. No condensing lens for focusing is provided in front of the reflecting mirror 26d.
Irradiate laser light toward 5. With the above configuration,
The laser device 26 of the present embodiment irradiates the upper surface of the workpiece 35 with two-axis laser light, a laser beam L1 indicating the processing position of the cutting blade 10 and a laser beam L2 illuminating the periphery of the processing position. You.

FIG. 5 shows another embodiment of the present invention, in which a cylindrical lens 26e is provided in front of a half mirror 26b so as to irradiate a linear laser beam L1 to a workpiece 35. It is. FIG. 6 shows the state of irradiation of the work material 35 with the laser beams L1 and L2.

FIG. 7 shows still another embodiment of the present invention.
By providing a concave lens 26f in front of the reflection mirror 26d, the laser light L2 is diffused, and a wider range is illuminated on the work 35.

FIG. 8 illustrates yet another embodiment of the present invention. Instead of the concave lens 26f of FIG.
The projection lens 26g for refracting the laser beam L2 is provided at an irradiation width of, for example, 100 mm.

In the above embodiment, the cutting blade 10
The tabletop circular saw that swings is described as a power tool,
It can be applied to other power tools.

[0019]

According to the present invention, the laser light indicating the processing position by the tip blade and the vicinity of the processing position are illuminated,
Since the laser beam irradiating around the black line drawn on the work material can be realized by one laser device (laser light source),
Since a work light is not required, an inexpensive power tool can be provided. The operator can easily perform the operation of adjusting the black line drawn on the work material to the laser beam even in a place where the working environment is relatively dark.

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment of a desk circle to which a laser device for blackout of the present invention is applied.

FIG. 2 is a right side view of FIG. 1 from which a cutting blade portion is omitted.

FIG. 3 is a perspective view showing a state in which a work material is irradiated with laser light.

FIG. 4 is a schematic diagram showing the optical system of FIG. 3;

FIG. 5 is a schematic view showing another embodiment of the optical system constituting the apparatus of the present invention.

FIG. 6 is a perspective view showing a state in which a workpiece is irradiated with laser light by the optical system of FIG. 5;

FIG. 7 is a schematic view showing another embodiment of the optical system constituting the device of the present invention.

FIG. 8 is a schematic diagram showing still another embodiment of the optical system constituting the apparatus of the present invention.

FIG. 9 is a left side view of FIG. 1 showing the vicinity of the holder unit of FIG. 1;

FIG. 10 is a sectional view taken along line AA of FIG. 1;

[Explanation of symbols]

10 is a cutting blade (tip tool), 26 is a laser device for marking out, 26c is a convex lens, 26e is a cylindrical lens, 26f is a concave lens, 26g is a convex lens, 35 is a work material, and 36 is a work material. Ink lines, L1 and L2 are laser beams.

Claims (4)

[Claims] 1. A power tool having a built-in cutting tool for cutting a work material and a black-out laser device for aligning the cutting tool with a black line drawn on the work material. A polarizing device that splits into two axes in almost the same direction, a convex lens that focuses on the work material only on one axis of the laser optical axis, and a laser beam on the other axis Laser device for marking out power tools characterized by irradiating 2. A marking tool for an electric power tool according to claim 1, wherein a cylindrical lens for linearizing the laser beam with respect to the workpiece is provided on the one axis of the laser beam. Laser equipment 3. The laser device for marking out a power tool according to claim 1, wherein a concave lens for diffusing the laser light is provided on the laser optical axis of the other axis. 4. A power tool according to claim 1, wherein a convex lens for defocusing and irradiating the work material is provided on the laser beam axis of the other axis. Laser device for ink marking