JPH0524492Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a portable dust-collecting circular saw.

[Background of the idea]

Fig. 3 shows an example of a conventional dust collector.
If the thickness of the work material is thin, loosen the adjustment nut 9, move the link 10 fixed to the base 5, set the base 5 to the position shown by the dotted line in the figure, and adjust the protrusion amount of the circular saw blade 6. After reducing the amount, tighten the adjustment nut 9, reduce the depth of cut, and perform the cutting operation. However, if the depth of cut is set small, a gap will be created between the saw cover 4, gear cover 11, and base 5. For this reason, there was a drawback that dust generated during cutting was scattered through this gap, resulting in a decrease in dust collection performance. In the figure, 1 is the handle, 2 is the housing, 3 is the dust collection case,
6 shows the circular saw blade, 7 shows the safety cover, and 8 shows the rotation method of the circular saw blade 6.

[Purpose of invention]

The purpose of the present invention is to eliminate the above-mentioned drawbacks of the prior art and provide a dust-collecting circular saw that has reliable and effective dust-collecting performance.

[Summary of the idea]

In order to prevent the dust generated during cutting from scattering, the present invention is devised so that the spring and cover installed inside the gear cover cover the area around the area where dust is generated, and seal the gap that occurs when adjusting the cutting depth.

[Example of idea]

An embodiment of the invention is shown in FIGS. 1 and 2. Power is transmitted from an electric motor built into the housing 2 to the circular saw blade 6 via a transmission means such as a gear. Dust collection case 3 that accumulates dust generated during cutting
is installed in a space formed by the housing 2, the front side of the circular saw blade 6, and the front upper part of the base 5. The front end of the gear cover 11 is provided with a hole 15 extending in the vertical direction for housing the spring 13 and a groove 16 communicating with the hole 15 and housing the cover 12 having a U-shaped cross section. A spring 13 is inserted, and a cover 12 having a U-shaped cross section is fitted into the groove 16 so as to be vertically movable. The cover 12 is pushed below the spring 13, and its lower end is in contact with the upper surface of the base 5. The cover 1 can be moved to any position by following the cut adjustment by moving the link 10 fixed to the base 5.
2 moves.

With the above configuration, the dust generated when cutting the thin work material 14 is blown out in the rotational direction 8 together with the air flow generated by the rotation of the circular saw blade 6, and the dust is blown out from the base 5, the saw cover 4, and the gear cover 11. Since the gap where dust is generated is sealed with the cover 12, effective dust collection performance can be ensured without scattering from the gap.

[Effect of idea]

As described above, according to the present invention, the cover installed between the base, saw cover, and gear cover allows
The gap near where the cutting dust was generated was sealed.
By adjusting the cutting depth, dust is not scattered from the gap, and effective dust collection performance can be ensured.

[Brief explanation of the drawing]

Fig. 1 is a partially sectional front view showing an embodiment of the dust collecting round of the present invention, Fig. 2 is a sectional view taken along the line A-A in Fig. 1, and Fig. 3 is an example of the conventional dust collecting round. It is a partially sectional front view shown. 1 is a handle, 2 is a housing, 3 is a dust collection case, 4 is a saw cover, 5 is a base, 6 is a circular saw blade, 7 is a safety cover, 11 is a gear cover, 1
2 is a cover, 13 is a spring, 15 is a hole, 16
is a groove.

Claims (1)

[Claims for Utility Model Registration] A handle, a housing containing a driving electric motor, a saw blade attached to the end of the housing and driven by the electric motor, and covering at least the upper half of the saw blade. A portable dust collecting circular saw comprising a gear cover, a saw cover, a base for setting the depth of cut, and a dust collection case for accumulating cutting dust, and the rear end of the base is moved up and down to set the depth of cut. A cover having a U-shaped cross section is attached to the front end of the gear cover so as to be movable up and down, and a spring is provided to push the cover toward the base, so as to close a gap between the base, the gear cover, and the saw cover. A portable dust-collecting circular saw that is characterized by: