JPH0533220Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an improvement of the dust collection mechanism of a portable dust collection circular saw.

[Conventional technology]

The structure of a conventional portable dust-collecting circular saw, particularly the structure around the slide cover where the dust-collecting function is a problem, will be explained with reference to FIGS. 5 to 7.

Fig. 5 is a side view of a conventional portable dust-collecting circular saw, in which 1 is the main body with a built-in motor and speed reduction mechanism (not shown), 2 is the saw blade driven by the motor, 3, 4 is a cover that covers the front and rear surfaces to prevent the cutting from scattering; 3 is the front cover, 4 is the rear cover,
5 is a safety cover that covers the lower part, 6 is a base rotatably mounted on a fulcrum shaft 6a, and 7 is a base 6.
8 is the adjustment nut, which holds the tip of the link.
Adjustment of the depth of cut of the cutting member is performed by loosening the member, tilting the base 5 downward, and then tightening it again to fix the link 7 and the cover 4 of the saw blade 2. Reference numeral 9 denotes a dust collection case, in which chips generated by the saw blade 2 are guided to a suction passage along covers 3 and 4, and accumulated in the dust collection case 9 through a guide groove (not shown). 10 is a slide cover that is supported by a fulcrum shaft 10a provided close to the bottom of the fulcrum shaft 6a and moves in accordance with the inclination of the base 6; 11 is a spring; the slide cover 10 is made up of two parallel plates; Spring 1 on the bottom
It is pressed against the berth 6 with a pressing force of 1.

6 and 7 are partial views of the area around the slide cover 10. When the depth of cut of the cutting member is large, as shown in FIG. It moves from the bottom to the top, passes between the two parallel plates of the slide cover 10, passes through the suction passage, and reaches the dust collection case 9.

By the way, as the cutting member becomes thinner and the depth of cut becomes smaller, as shown in FIG. 7, the base 6 and the slide cover 10 interlocking therewith tilt downward,
A gap is created between the end 4a of the cover 4 that covers the rear surface of the saw blade 2 and the slide cover 10, and some of the chips leak outside through this gap and become scattered.

However, no measures have been taken to prevent this leakage.

[Problem that the invention attempts to solve]

As described above, according to the prior art, if the depth of cut of the material to be cut is small, the chips leak to the outside through the gap between the end 4a of the cover 4 and the slide cover 10 and scatter, reducing the dust collection efficiency.

In addition, the slide cover 10 uses a transparent resin molded product to make the cutting edge of the saw blade 2 easier to see, but when cutting metal building materials, etc., the inner circumference of the slide cover 10 may wear out due to chips and dust. I had a problem.

The present invention aims to eliminate the drawbacks of the prior art and provide a portable dust-collecting circular saw with good dust-collecting efficiency and durability.

[Means for solving problems]

In the present invention, one end is attached to a slide cover, and the other end is moved toward the outer circumference of the saw blade while being in contact with the inner wall of the end of the cover that covers the rear surface of the saw blade. The present invention is characterized in that an elastic shielding plate is provided to close the gap created between the end of the rear cover and the slide cover.

[Effect]

In the present invention, an elastic shielding plate is provided between the end of the cover that covers the rear surface of the saw blade and the slide cover so as to come into contact with the inner wall of the end of the cover, so that the cutting member is thin and the base is Even when the sliding cover interlocking with the sliding cover is tilted downward, it is possible to prevent chips from leaking outside through the gap formed between the end of the cover and the sliding cover, thereby preventing the dust collection efficiency from decreasing.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

1 to 3 are partial views showing the vicinity of the slide cover of the portable dust-collecting circular saw according to this embodiment, and correspond to the parts shown in conventional FIGS. 6 and 7.

In this embodiment, this part is improved, and the other parts are the same as the conventional one shown in FIG.

FIGS. 1 and 2 are side views of the slide cover and its surroundings, and FIG. 3 is a bottom view of FIG. 1. In FIGS. 1 and 3, reference numeral 12 denotes a shielding wall formed of an iron plate spring, one end of which is attached to the bottom of the slide cover 10, and a wall 12a formed at the other end that covers the rear surface of the saw blade 2. The end portion 4a of the covering cover 4 is in contact with the inner wall.

FIG. 4 is an exploded view showing the structure of the slide cover 10 and the shielding wall 12, and the figure shows a situation where the shielding wall 12 is attached between two parallel plates of the slide cover 10.

By the way, when the cutting depth of the cutting member is adjusted and the base 6 is tilted downward, the slide cover 10 is lowered in conjunction with this, and there is a gap between the end 4a of the cover 4 and the slide cover 10 as shown in FIG. As shown, a gap is created, but the wall 12a moves toward the outer circumference of the saw blade 2 while in contact with the inner wall of the end 4a of the cover 4, closing the gap.

Thus, according to the present invention, by attaching the shielding wall 12 to the bottom of the slide cover 10, it is possible to prevent chips from leaking outside through the gap and scattering, while also preventing dust generated when cutting metal. This can prevent the slide cover 10 from being worn out.

[Effect of idea]

According to the present invention, it is possible to solve the drawbacks of the prior art and to obtain a portable dust collecting circular saw with good dust collecting efficiency and durability.

[Brief explanation of the drawing]

Figures 1 and 2 are side views of the vicinity of the slide cover of a portable dust-collecting circular saw according to an embodiment of the present invention in different usage conditions; Figure 3 is a bottom view of Figure 1;
The figure is an exploded view of the slide cover and shielding wall of the present invention, Figure 5 is a side view of a conventional portable dust collecting circular saw, and Figures 6 and 7 are partial views of Figure 5 in different usage conditions. . 1 is the main body, 2 is the saw blade, 3 is the front cover, 4 is the rear cover, 6 is the base, 7 is the link, 8 is the adjustment nut, 9 is the dust collection case, 10 is the slide cover, 11
is a spring, and 12 is a shielding wall.

Claims (1)

[Scope of utility model registration request] A saw blade driven by a motor, a cover that covers the front and rear surfaces of the saw blade, a dust collection mechanism that collects chips generated by the saw blade, and one end of which is rotatably attached via a fulcrum shaft. The base is pivoted by a link provided at the other end of the base to adjust the depth of cut of the material to be cut, and another fulcrum shaft provided close to the fulcrum shaft of the base. In a portable circular saw having an interlocking slide cover, one end of the saw blade is attached to the slide cover, and the other end is in contact with the inner wall of the end of the rear cover of the saw blade. A portable dust-collecting circular saw machine, characterized in that it is provided with an elastic shielding plate that moves in the outer circumferential direction and closes the gap created between the end of the rear cover of the saw blade and the slide cover.