JPH08118302A - Base for portable circular saw - Google Patents

Abstract

PURPOSE: To enable the position of a blade tip to be grasped exactly by providing a graduation part which indicates the position of a blade tip on the lateral part of the base of a circular saw. CONSTITUTION: A graduation part 5 which indicates the position of a blade tip of a circular saw blade 2 against a cut depth is provided on the lateral side of a base 1. The blade tip position of the circular saw blade 2 shows the same value as the protrusion amount of the saw blade 2 protruding from the bottom surface of the base 1, so that a length upto an inked line 4 is cut accurately by cutting it in such a manner that the graduation position coincides with the inked line 4. Thus even if the cut depth is changed, it is possible to determine the blade tip position of the circular saw blade 2, and cut upto the inked line 4 easily even in an operation to punch out a window.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable round base provided with a graduation portion for indicating the position of the cutting edge of a rotary blade.

[0002]

2. Description of the Related Art A conventional portable circular base is shown in FIGS. As shown in the figure, this portable round base 1
The black wire guide hole 6 and the black wire guide groove 8 are provided so that the position of the cutting edge at the maximum cutting in the specific tool diameter can be grasped.

To cut the work material 3 with a portable circular saw,
When cutting at the maximum cutting depth as shown by the solid line in FIG. 5, and when loosening the lever 7 for fixing the base 1 and moving the base 1 as shown by the dotted line in FIG. In some cases, the cutting amount is adjusted and the cutting depth is set before cutting.

[0004]

With the black wire guide groove 8 and the black wire guide hole 6 provided in the base 1 as described above, it is possible to grasp only the position of the cutting edge in the state of the maximum cutting depth at the specific blade diameter. Therefore, when the cutting depth is changed as shown by the dotted line in FIG. 5, there is a disadvantage in that the cutting edge position cannot be grasped from the black line guide groove 8 and the black line guide hole 6, and FIG. In the work of stopping the cutting in the middle of the work material 3 such as the window cutting shown, the cutting up to the black line cannot be performed accurately. The object of the present invention is to be able to grasp the cutting edge position of a rotary blade even when the cutting depth is changed, and to cut up to the black line even in the work of stopping cutting in the middle of the work material such as window cutting work etc. To be able to do it accurately.

[0005]

The above object is achieved by providing a scale portion on the side portion of the base, which indicates the cutting edge position of the rotary blade in correspondence with the cutting depth.

[0006]

With the base constructed as described above, the position of the cutting edge of the rotary blade can be grasped even if the cutting depth is changed.

[0007]

EXAMPLE An example of the present invention is shown in FIGS. As shown in the figure, a scale portion 5 is provided on the side portion of the base 1 to indicate the cutting edge position of the rotary blade 2 in correspondence with the cutting depth. The portable circular saw shown in FIG. 2 shows the state at the time of maximum cutting and the cutting depth is not changed, but the protruding amount of the rotary blade 2 protruding from the bottom surface of the base 1 is 30 cm. The blade edge position of the rotary blade 2 is 30 cm on the scale 5, and black line alignment is performed at this position. Although not shown, if the cutting depth is changed and the protruding amount of the rotary blade 2 protruding from the bottom surface of the base 1 is 10 cm, the blade tip position of the rotary blade 2 is 10 cm of the scale portion 5.

In this way, the blade edge position of the rotary blade 2 is the scale position of the scale portion 5 showing the same numerical value as the amount of protrusion of the rotary blade 2 protruding from the bottom surface of the base 1. It is possible to perform accurate cutting up to the black line by cutting until the black line coincides with the scale position having the same numerical value as the protrusion amount and stopping the cutting at the time of coincidence.

[0009]

According to the present invention, it is possible to grasp the position of the cutting edge of a rotary blade even when the cutting depth is changed. Therefore, the work for stopping the cutting in the middle of the work material such as the window cutting work. However, it will be possible to accurately cut up to the black line.

[Brief description of drawings]

FIG. 1 is a front view showing this embodiment of a portable circle of the present invention.

FIG. 2 is a top view of FIG.

FIG. 3 is a top view showing an embodiment of the present invention base.

FIG. 4 is a side view of FIG.

FIG. 5 is a front view showing an example of a conventional portable circle.

FIG. 6 is a top view of FIG.

FIG. 7 is a top view showing an example of a conventional base.

FIG. 8 is a side view of FIG.

[Explanation of symbols]

1 is a base, 2 is a rotary knife, 3 is a work material, 4 is a black line, 5
Is a scale portion, 6 is a black wire guide hole, 7 is a lever, and 8 is a black wire guide groove.

Claims (1)

[Claims] 1. A housing containing an electric motor for driving,
In a portable circular saw equipped with a rotary blade driven by the electric motor and a base that slides on a material to be cut, a scale portion showing a cutting edge position of the rotary blade corresponding to a cutting depth in a side portion of the base. This is a portable circular saw base.