JP2000326302A - Portable dust collecting circular saw - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a portable dust collecting circular saw, which has a favorable dust collecting rate and can realize a shift cutting. SOLUTION: In this circular saw, a detachable dust-proof cover 8 is provided at the lower end part of a saw cover 4, or, a dust-proof cover, which moves upwards in interlocking with the pivoting of a base 6, is provided at the lower end part of the saw cover. Since a gap is eliminated between the lower end of the saw cover and the top surface of the base along the dust-proof cover by fitting the dust-proof cover at the lower end part of the saw cover, the lowering of a dust-collecting rate can be suppressed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable dust collecting circular saw capable of cutting a base by inclining a base with respect to a side surface of a saw blade.

[0002]

2. Description of the Related Art In a portable dust collecting circular saw, a saw cover covers almost the entire saw blade above a base in order to prevent chips generated during cutting from scattering.

However, in the portable dust collecting circular saw having such a configuration, the base is inclined with respect to the saw blade because the lower end of the saw cover is in contact with or close to the upper surface of the base. It could not be cut because it could not be cut.

FIG. 12 shows an example of a portable dust collecting circle capable of performing the inclined cutting described above.
FIG. 12 is a cross-sectional side view of a main part showing an example of this conventional portable dust collecting circle, where 1 is a main body incorporating a motor (not shown),
2 is a saw blade, 10 is a gear cover, 4 is a saw cover attached to the gear cover 10, 6 is a base rotatably attached to the main body 1, 18 is the gear cover 10 and the saw cover 4.
Is a chip discharge passage formed by the above, 19 is a rotating shaft of the electric motor in the main body 1, 20 is a fixing member for attaching the saw blade 2 to the rotating shaft 19, and the dashed line is the base 6 when the inclined cutting is set. Is shown.

As shown in the figure, the surface of the saw blade 2 above the base 6 on the main body 1 side is covered by a gear cover 10 and the surface on the opposite side of the main body 1 is almost covered by a saw cover 4. The swarf generated during cutting is prevented from scattering.

[0006]

In the portable dust collecting circular saw as described above, the lower end of the saw cover 4 is separated from the upper surface of the base 6 so that the base 6 can be inclined as shown in the figure. It is configured to be located at For this reason, a gap is formed between the lower end of the saw cover 4 and the upper surface of the base 6 during normal cutting, that is, when the base 6 is not inclined, and chips are scattered from the gap, resulting in a poor dust collection rate. There was a disadvantage.

The portable dust collecting circular saw shown in the figure has a configuration in which the base 6 can be tilted by about 45 ° as shown by a dashed line, but the base 6 can be further tilted. In the case where the configuration is possible, a gap generated between the lower end of the saw cover 4 and the upper surface of the base 6 is increased, and the dust collection rate is further reduced.

An object of the present invention is to solve the above-mentioned drawbacks and to provide a portable dust-collecting saw having a good dust-collecting rate and capable of being cut off.

[0009]

The above object is achieved by providing a dust cover at the lower end of the saw cover which is detachable or moves upward in association with the inclination of the base.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a portable dust collecting circle according to the present invention will be described below with reference to FIGS. FIG. 1 is a front view showing one embodiment of the portable dust collecting circle of the present invention, FIG. 2 is an enlarged sectional view taken along line CC of FIG. 1, FIG. 3 is a sectional side view of a main part of FIG. FIG. 4 is a cross-sectional side view of a main part showing a state where the base 6 is inclined with respect to 1.

Chips generated when the workpiece 3 is cut by a saw blade 2 driven by an electric motor (not shown) incorporated in the main body 1 are blown up in the saw cover 4 in the direction of arrow A together with an air flow. And is discharged from the swarf discharge port 5. A connection hose or a dust bag of a dust collector (not shown) is connected to the chip discharge port 5 for storing chips. Further, a base 6 is provided below the main body 1 so as to be rotatable with respect to the main body 1.

As shown in the figure, a detachable dust cover 8 is provided at the lower end of the saw cover 4. As shown in FIG. 2, hooks 9 having elasticity are provided at both ends of the dustproof cover 8, and the hooks 9 can be engaged with a fixing portion 11 provided on the gear cover 10.

The dustproof cover 8 is attached to the lower end of the saw cover 4 by engaging the hook 9 with the fixing portion 11 of the saw cover 4, and the hook 9 is urged in the direction B in the drawing to elastically deform so that the dustproof cover 8 is connected to the fixing portion 11. The engagement with the hook 9 is released, and the dust cover 8 can be removed from the lower end of the saw cover 4.

FIGS. 1 and 3 show a state in which a dustproof cover 8 is attached to the lower end of the saw cover 4. As shown in FIG. 1, there is no gap between the lower end of the saw cover 4 and the upper surface of the base 6. It is possible to suppress a decrease in the dust rate.

When the base 6 is inclined with respect to the main body 1, the inclination can be cut by removing the dust cover 8 as shown in FIG.

Another embodiment of the portable dust collecting circle of the present invention is shown in FIGS.

As shown in the figure, a dustproof cover 8 having a long hole 12 is attached to the lower end of the saw cover 4 via a screw 14 so as to be vertically movable. Further, a leaf spring 15 for constantly urging the dustproof cover 8 toward the base 6 is provided above the dustproof cover 8, whereby the lower end of the dustproof cover 8 is always in contact with the upper surface of the base 6.

For this reason, at the time of normal cutting, that is, the base 6
5 and 6, the dust-proof cover 8 is located below as shown in FIGS. 5 and 6, and the gap between the lower end of the saw cover 4 and the upper surface of the base 6 is eliminated to suppress a reduction in the dust collection rate. .

When the base 6 is inclined with respect to the main body 1, the dust cover 8 is pushed up by the upper surface of the base 6 when the base 6 is rotated, and the saw cover 4 is rotated.
In this case, the dustproof cover 8 also eliminates the gap between the lower end of the saw cover 4 and the upper surface of the base 6.

Further, as shown in FIG.
The state shown in FIG.
Is rotated by the urging force of the leaf spring 15, the dustproof cover 8 is lowered in conjunction with the rotation of the base 6, and the dustproof cover 8 is rotated.
Keeps the lower end always in contact with the upper surface of the base 6.

As described above, the dust cover 8 is provided at the lower end of the saw cover 4 at the lower end of the saw cover 4 so as to move up and down with respect to the rotation of the base 6. It is possible to prevent a gap from being generated therebetween, to suppress a reduction in the dust collection rate, and to eliminate troublesome work such as removing the dust-proof cover 8 before the inclined cutting work, thereby improving workability. Can be done.

Further, even in a state other than the state where the base 6 is not inclined with respect to the main body 1 and the state where the base 6 is inclined up to the maximum, that is, the state where the base 6 is slightly inclined, It is possible to prevent a gap from being formed between the upper surface of the base 6 and the lowering of the dust collection rate.

Another embodiment of the portable dust collecting circle of the present invention is shown in FIGS.

In this embodiment, as in the embodiment shown in FIGS. 5 to 7, there is no need to perform an operation such as removing the dustproof cover 8 when performing the inclined cutting. The lower end of a dustproof cover 8 held vertically at the lower end of the saw cover 4 by a screw 14 attached to the saw cover 4 through an elongated hole 12 is rotatably mounted on the upper surface of the base 6.

More specifically, at both ends of the lower end of the dust cover 8, there are provided convex portions 16 projecting outward, and the convex portions 16 are formed in through holes 17 provided near the lower end of the saw cover 4 on the upper surface of the base 6. The dust cover 8 is rotatably engaged, so that the dust cover 8 is rotatable around the convex portion 16 as a fulcrum.

In a normal state, that is, when the base 6 is not inclined with respect to the main body 1, the dustproof cover 8 is located at the lowered position as shown in FIGS. As a result, the projection 16 rotates about the projection 16 as a fulcrum, and FIG.
As shown in FIG.

When the base 6 inclined as shown in FIG. 11 is returned to a normal state as shown in FIG.
Rotates around the convex portion 16 and returns to the lowered position with respect to the saw cover 4.

As described above, the dust-proof cover 8 moves up and down with respect to the saw cover 4 in conjunction with the rotation of the base 6, so that a gap is always generated between the lower end of the saw cover 4 and the upper surface of the base 6. In addition to preventing the dust, the dust-proof cover 8 does not need to be removed at the time of inclined cutting, and the workability is good.

In the above embodiment, the base 6 can be tilted by about 45 ° with respect to the main body 1. However, the base 6 can be tilted at an angle larger than 45 °. Can be dealt with by increasing the width of the dust-proof cover 8, and in the case of a configuration in which the dust-proof cover 8 is vertically movably attached to the saw cover 4, it is necessary to set a further larger vertical movement range.

[0030]

According to the present invention, a gap is generated between the lower end of the saw cover and the upper surface of the base by providing the dust cover at the lower end of the saw cover which is detachable or moves upward in conjunction with the inclination of the base. This makes it possible to provide a portable dust collecting circular saw having a good dust collecting rate and capable of being inclined.

[Brief description of the drawings]

FIG. 1 is a front view showing one embodiment of a portable dust collecting circle of the present invention.

FIG. 2 is an enlarged sectional view taken along line CC of FIG. 1;

FIG. 3 is a sectional side view of a main part of FIG. 1;

FIG. 4 is an essential part cross-sectional side view showing a state where the base is inclined.

FIG. 5 is a front view showing another embodiment of the portable dust collecting circle of the present invention.

FIG. 6 is a sectional side view of a main part in FIG. 5;

FIG. 7 is a sectional side view of a main part of FIG. 5, showing a state where the base is inclined.

FIG. 8 is a front view showing another embodiment of the portable dust collecting circle of the present invention.

FIG. 9 is a sectional side view of a main part of FIG. 8;

FIG. 10 is an enlarged view of a main part of FIG. 9;

11 is a cross-sectional side view of a main part of FIG. 9 showing a state where the base is inclined.

FIG. 12 is a cross-sectional side view of a main part showing an example of a conventional portable dust collecting circle.

[Explanation of symbols]

1 is a main body, 2 is a saw blade, 3 is a material to be cut, 4 is a saw cover, 6 is a base, 8 is a dustproof cover, 10 is a gear cover,
14 is a screw, 15 is a spring.

Claims (4)

[Claims] 1. A main body incorporating a motor, a saw blade rotatably mounted on the main body and driven by the motor, and a lower saw blade rotatably mounted below the main body protruding from a lower surface. A portable dust collecting circle having a base, a gear cover provided on the main body and substantially covering the side surface of the saw blade above the base, and a saw cover substantially opposite to the gear cover and substantially covering the opposite side of the main body of the saw blade above the base. A portable dust collecting circular saw, wherein a removable dust cover is provided at a lower end of the saw cover. 2. A main body incorporating a motor, a saw blade rotatably mounted on the main body and driven by the motor, and a lower saw blade rotatably mounted below the main body protruding from the lower surface. A portable dust collecting circle having a base, a gear cover provided on the main body and substantially covering the side of the main body of the saw blade above the base, and a saw cover opposed to the gear cover and substantially covering the opposite side of the main body of the saw blade above the base. A portable dust collecting circular saw, wherein a dust-proof cover is provided at a lower end of the saw cover and moves upward in conjunction with rotation of a base. 3. The portable dust collecting circle according to claim 2, wherein the dust cover is provided at the lower end of the saw cover so as to be vertically movable, and an urging member for constantly urging the dust cover toward the base is provided. Mushroom. 4. The portable dust collecting circle according to claim 2, wherein the dust cover is provided at the lower end of the saw cover so as to be vertically movable and the lower end of the dust cover is rotatably mounted on the upper surface of the base. This.