JP4067158B2 - Portable circular saw - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a portable circular saw that improves the visibility of the blade edge of a saw blade.
[0002]
[Prior art]
For this cutting operation of the portable round, a method of cutting with the guide 16 in contact with the side surface of the material to be cut 15 as shown in FIG. 5, or a black line 17 on the material to be cut 15 as shown in FIG. There are methods such as drawing and cutting the black line 17. In the former case, after adjusting the cutting edge 4a of the saw blade 4 to the cutting position of the material 15 to be cut, the guide 16 is adjusted and brought into contact with the side surface of the material 15 for cutting. Cuts while aligning the cutting edge 4 a with the black line 17.
[0003]
As described above, accurate cutting cannot be performed unless the position of the blade edge 4a of the saw blade 4 is always recognized during the cutting operation, and it is important that the blade edge has good visibility. Japanese Utility Model Laid-Open No. 60-98602 describes a circular saw in which a lighting device is provided on a protective cover covering the saw blade to improve the visibility of the blade edge.
[0004]
[Problems to be solved by the invention]
The circular saw described in Japanese Utility Model Laid-Open No. 60-98602 has a configuration in which a lighting device is provided in the vicinity of the edge of the protective cover and a transparent window is provided in the protective cover to illuminate the edge of the saw blade. It is designed to make it easier to check the blade edge even in dark places, but when cutting, the dust scatters inside the protective cover and attaches to the inner wall of the transparent window. There was a drawback that it was difficult to do. In addition, since the protective cover is provided with a lighting device, when the storage battery, which is the drive source of the electric motor, is used as the power source, wiring to the housing in which the storage battery is stored is required, and the assembly is remarkably bad and the cover covers the wiring Etc. are also required, resulting in an expensive structure.
An object of the present invention is to provide a portable circular saw that can eliminate the above-mentioned drawbacks and can improve the visibility and assemblability of the cutting edge.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the present invention controls a housing with a built-in electric motor, a saw blade driven by the motor to cut a material to be cut, a protective cover that covers the saw blade, and on / off of the motor. A portable circular saw that is connected to the housing and has a base that is slidable on the material to be cut, and the lighting device is disposed at a position perpendicular to the side surface of the saw blade. A switch is provided to illuminate the blade edge of the saw blade by irradiating light from a right angle direction on the side surface of the saw blade, and to connect and shut off the lighting device and the power source that is the drive source of the electric motor. It has one feature.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
One embodiment of the portable circle of the present invention will be described with reference to FIGS. FIG. 1 is a perspective view showing an embodiment of the portable circle of the present invention, and FIG. 2 is an enlarged cross-sectional view of the main part of FIG. As is apparent from the figure, the circular saw body has a housing 1 containing a motor, a saw blade 4, and a protective cover that covers the saw blade 4.
The housing 1 is provided with a hinge portion 1 a connected to the base 2 so as to protrude forward from the cutting edge 4 a of the circular saw 4. As shown in the figure, the hinge unit 1a is provided with an illumination device 3, and the illumination device 3 illuminates the cutting edge 4a of the saw blade 4 from the lateral direction. As shown in FIG. 2, the illuminating device 3 includes an electric wire 5, a socket 6 having connection terminals, a light bulb 7, and a transparent cover 8 that covers the light bulb 7. As shown in the figure, the electric wire 5 of the lighting device 3 is located in the housing 1 and is connected to a storage battery that is a drive source of an electric motor (not shown).
[0007]
Since the chips generated at the time of cutting are scattered in the cutting direction of the saw blade 4, the blade edge 4 a is illuminated from the direction perpendicular to the cutting direction of the saw blade 4 as described above. 4a does not become difficult to confirm, and chips do not adhere to the transparent cover 8 of the lighting device 3, so that the visibility of the blade edge 4a can be improved. Further, since the electric wire 5 that connects the lighting device 3 to the storage battery that is the driving source of the portable circle is located in the housing 1, it is not necessary to use an electric wire cover or the like, and it can be constructed at low cost and assembled. Can be improved.
[0008]
3, FIG. 4 shows an example of this configuration of the portable circular to be compared with the present invention. The portable circular saw shown in the drawing devises the configuration of the lighting device 3, and the configuration other than the lighting device 3 and the hinge portion 1a of the housing 1 is the same as that of the above-described embodiment, so that the description thereof is omitted.
As shown in the figure, a bent tube 9 is provided in the hinge portion 1 a of the housing 1, and an illumination device 3 is attached to an end of the bent tube 9.
In the embodiment shown in FIG. 1, there is a drawback that the hinge portion 1a is separated from the blade edge 4a when the cutting depth is changed. However, as described above, the illumination device 3 is configured to be movable. Ru can be eliminated.
[0009]
In addition, when the switch which connects and interrupts | blocks the illuminating device 3 and the storage battery which is a drive source, ie, the switch which turns on and off the illuminating device 3, is provided in the hinge part 1a, it can be operated from the outside. Further, a safety lever 11 that is an off-lock mechanism of the drive switch 10, that is, a mechanism that locks the drive switch 10 in the off state, is provided in the grip portion of the circular saw body as shown in FIG. (or lock off the drive switch 10, the operation for releasing the lock), connecting the illumination device 3 and the storage battery in accordance with the operation, Ru is considered to provide a switch for interrupting. In this case, since the illumination device 3 is reliably turned on before starting the cutting operation, the operability is improved.
[0010]
Further, when the safety lever 11 is operated , a switch that opens and closes in conjunction with the operation of the safety lever 11 and a switch that can be operated from the outside are provided in the main body 1 can improve operability and when necessary. The lighting device 3 can be turned on only in
It is desirable that the safety lever 11 described above is configured to continue to be turned on without applying a load if the drive switch 10 is turned on, and to be turned off in conjunction with the drive switch 10 being turned off.
[0011]
【The invention's effect】
As described above, according to the present invention, the housing is provided with an illuminating device capable of illuminating the cutting edge of the saw blade from a direction perpendicular to the cutting direction of the saw blade, and the illuminating device and the drive source of the electric motor are connected. By providing a switch for shutting off, the cutting edge generated during cutting does not make it difficult to check the cutting edge, and the electric wire connecting the lighting device and the drive source of the electric motor can be positioned in the housing. Therefore, it is possible to provide a portable circular saw that can improve the visibility and assemblability of the blade edge.
[Brief description of the drawings]
FIG. 1 is a perspective view showing one embodiment of the portable round of the present invention.
FIG. 2 is an enlarged cross-sectional view of a main part of FIG.
FIG. 3 is a perspective view showing an example of this configuration of a portable round compared with the present invention.
4 is an enlarged cross-sectional view of the main part of FIG. 3;
FIG. 5 is a perspective view showing an example of a cutting operation state of a conventional portable round.
FIG. 6 is a perspective view showing an example of a cutting operation state of a conventional portable round.
[Explanation of symbols]
1 is a housing, 1a is a hinge portion, 3 is a lighting device, 4 is a saw blade, 4a is a blade edge portion, 8 is a transparent cover, and 11 is a safety lever.

Claims (2)

A housing with a built-in electric motor, a saw blade driven by the motor to cut the material to be cut, a protective cover that covers the saw blade, a drive switch that controls on / off of the motor, and the housing are connected to be cut. A portable circular saw having a base slidable on the material, wherein the lighting device is arranged at a position perpendicular to the side surface of the saw blade and perpendicular to the side surface of the saw blade. A portable circular saw characterized by irradiating light from the direction to illuminate the blade edge of the saw blade, and providing a switch for connecting and shutting off the illumination device and the power source that is the drive source of the electric motor. A safety lever that is an off-lock mechanism of the drive switch is provided, and a switch that connects and disconnects the lighting device and the power source is opened and closed in conjunction with the operation of the safety lever. The portable circular saw according to 1.

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