JP4574305B2 - Circular saw with dust container - Google Patents

Description

  The present invention has a saw blade cover that covers the saw blade, and a dust collection container that is connected to the saw blade cover by piping, and chips are blown up toward the dust collection container by the rotation of the disk-shaped saw blade. The present invention relates to a circular saw with a dust collecting container that is collected in a dust collecting container.

Conventionally, various circular saws are known. For example, the circular saw described in Patent Document 1 is known.
The circular saw according to Patent Document 1 is a tabletop circular saw, a saw blade cover that covers the saw blade, a guide tube that is piped to the saw blade cover, and a cloth dust collection bag that is attached to the tip of the guide tube And have. A fan was installed in the guide tube.
Therefore, the chips generated on the saw blade side are sent to the dust collection bag by the fan force and the blowing force by the rotation of the saw blade. The chips and air sent into the dust bag are separated when the chips get caught in the dust bag cloth and the air passes through the cloth, and the chips are collected in the dust bag. It was.
JP-A-10-180713

However, in the case where the dust and the air are separated by the dust collection bag, there is a problem that the dust collection efficiency is gradually lowered due to the clogging of the dust in the cloth of the dust collection bag. In order to reduce the dust collection capability, it is necessary to provide a fan or the like for assisting the blowing force by the rotation of the saw blade.
SUMMARY OF THE INVENTION It is an object of the present invention to provide a circular saw with a dust collecting container that can efficiently collect chips generated by a saw blade without reducing the flow of air blown up by the rotation of the saw blade. To do.

In order to solve the above-mentioned problems, the present invention is a circular saw with a dust collecting container having a configuration as described in each claim.
According to the first aspect of the present invention, the dust collecting container has a first dust collecting chamber, a cyclone unit, and a second dust collecting chamber in order to separate the blown-up air from the chips. ing. The first dust collecting chamber is configured to drop the chips blown up from the saw blade side together with air by gravity and store the dropped chips. The cyclone unit consists of a cyclone body that rotates and drops along the wall surface the chips that have been sent along with the air from the first dust chamber without falling in the first dust chamber, and the lower part of the cyclone body And a chip discharge port for discharging chips toward the second dust collection chamber, and an exhaust port for exhausting air above the cyclone body. The chips and air are separated by the first dust collecting chamber and the cyclone unit, and the dust collecting container is not provided with a cloth filter for separating the chips and air.

  Therefore, the chips generated on the saw blade side are blown up with the air by the rotation of the saw blade and sent to the first dust collecting chamber. In the first dust collection chamber, the chips fall by gravity and are stored in the first dust collection chamber. The chips that have not fallen in the first dust collection chamber are sent to the cyclone unit and separated from the air by using the centrifugal force generated in the cyclone unit. Then, the chips separated by the cyclone unit are discharged to the second dust collecting chamber, and the air is exhausted from the exhaust port of the cyclone unit.

  Thus, large chips are stored in the first dust collecting chamber, and small chips are stored in the second dust collecting chamber. Further, the dust collecting container is not provided with a cloth filter for separating chips and air. Therefore, the flow of air blown up by the rotation of the saw blade is not hindered by the cloth filter. Further, since the cloth filter is not provided, there is no problem that the filter cloth is clogged with chips and the dust collecting ability is gradually lowered. Thus, the chips generated by the saw blade can be efficiently collected in the dust collecting container.

According to the first aspect of the present invention, the angle adjuster for adjusting the relative angle of the dust collecting container with respect to the saw blade cover is provided between the saw blade cover and the dust collecting container.
Therefore, the angle adjuster can adjust the angle of the dust collecting container to a suitable angle. For example, the angle of the dust collecting container can be adjusted to an angle at which the performance of the cyclone unit is suitable.

According to the first aspect of the present invention, the saw blade cover is attached above the base so as to be tiltable in the vertical direction with respect to the base. A configuration in which the relative angle between the saw blade cover and the dust collecting container when the saw blade cover is in the upper position is adjusted to be smaller than the relative angle when the saw blade cover is in the lower position by the angle adjuster. It has become.

Therefore, when the saw blade cover is set to the upper position, the dust collecting container comes close to the saw blade cover. Therefore, the dust collecting container is less likely to get in the way, and the saw blade cover can be tilted sufficiently upward.
On the other hand, when the saw blade cover is in the lower position, the angle of the dust collecting container with respect to the saw blade cover becomes wide. For this reason, the angle change with respect to the ground of a dust collecting container becomes smaller than the angle change with respect to the ground of a saw blade cover. Therefore, the cyclone unit is prevented from being largely inclined with respect to the ground. As a result, it is possible to prevent a phenomenon in which the cyclone unit is largely inclined and the separation capability of the chips and air by the cyclone unit is lowered.

According to the invention described in claim 2 , the dust collecting container has one lid extending across the first dust collecting chamber and the second dust collecting chamber, and opens the one lid. Thus, the chips in both dust collection chambers can be discarded.
Therefore, by opening one lid, the chips stored in the first dust collection chamber and the second dust collection chamber can be discarded at a time.

(Embodiment 1)
The first embodiment will be described with reference to FIGS.
The circular saw according to Embodiment 1 is a slide circular saw 1 as shown in FIG.
As shown in FIGS. 1 and 2, the slide circular saw 1 includes a base 10 that is placed on the floor, a table 11 that is rotatably attached to the base 10 in the surface direction, and a table 11 that is 2 It has the 1st slide body 12 attached to the left-right direction so that a slide is possible, and the 2nd slide body 13 attached to the first slide body 12 so that a slide to the left-right direction is possible. A circular saw body 2 is attached to the left end portion of the second slide body 13 so as to be tiltable, and a dust collecting container 3 is attached to the circular saw body 2.

  A fence 10a is fixed to the base 10 as shown in FIG. The cutting material W is placed on the upper surface of the table 11 with one side in contact with the fence 10a. Then, it is pressed from above by a pressing portion (not shown) and fixed to the upper surface of the table 11.

As shown in FIG. 2, the first slide body 12 has a slide main body 12a and a swinging portion 12b.
The slide body 12a is supported by the arm 12c so as to be slidable in the left-right direction in FIG. The swinging part 12b is attached to the slide main body part 12a by a shaft member 12d so as to be swingable in the thickness direction of FIG.
An angle fixing device is provided between the slide main body portion 12a and the rocking portion 12b. The angle fixing device positions and fixes the rocking portion 12b with respect to the slide main body portion 12a at a predetermined angle position. It is configured to be operated by.

As shown in FIG. 1, the second slide body 13 has two arms 13a and 13b and two arm holders 13c and 13d. As shown in FIG. 1, the arms 13a and 13b pass through the upper part of the swing part 12b and are supported so as to be slidable in the left-right direction with respect to the swing part 12b.
As shown in FIG. 2, an arm holder 13c is attached between the right ends of the arms 13a and 13b, and an arm holder 13d is attached between the left ends. The circular saw body 2 is attached to the arm holder 13d so as to be tiltable in the vertical direction.

As shown in FIG. 4, the circular saw body 2 includes a motor housing 21, a body housing 24, and a saw blade cover 20.
An electric motor 22 and a cooling fan 23 are housed in the motor housing 21. The motor housing 21 is fixed to the worker's right hand side surface of the main body housing 24.
As shown in FIG. 2, the main body housing 24 has a handle 24a and an auxiliary handle 24b that are gripped during a cutting operation.

As shown in FIG. 4, the saw blade cover 20 is fixed to the left side surface of the operator of the main body housing 24, and the right end of FIG. 4 is attached to the arm holder 13 d by the tilt shaft 26 so as to be tiltable. As a result, the circular saw body 2 tilts in the vertical direction with respect to the second slide body 13 about the tilt shaft 26.
As shown in FIG. 2, the saw blade cover 20 is configured to cover the saw blade 14 and has a hollow portion 20 a that accommodates about half of the upper side of the disk-shaped saw blade 14. The saw blade cover 20 has a discharge port 20b for discharging the chips blown up by the saw blade 14 into the hollow portion 20a.
The discharge port 20b has a through-hole penetrating the hollow portion 20a and the upper rear side portion (upper right side portion in FIG. 2) of the outer peripheral surface of the saw blade cover 20, and the discharge port 20b is blown with chips. It extends in the direction. A dust collection container 3 is connected to the tip of the discharge port 20b by piping.

In order to separate the air blown up by the saw blade 14 and the chips as shown in FIG. 1, the dust collecting container 3 includes a first dust collecting chamber 3a, a cyclone unit 3c, a second dust collecting chamber 3b, have.
As shown in FIG. 9, the dust collecting container 3 has a first outer wall member 30, an intermediate wall member 31, a second outer wall member 32, and a lid 34.
The first dust collection chamber 3a is formed in a hollow chamber shape between the first outer wall member 30 and the intermediate wall member 31, and the second dust collection chamber 3b is formed of the intermediate wall member 31 and the second outer wall member 32. Are formed in a hollow chamber shape (see FIG. 7).

An intake port member 33 is attached between the first outer wall member 30 and the intermediate wall member 31 as shown in FIG. One end of the intake port member 33 is opened to the first dust collecting chamber 3a, and the other end is connected to a discharge port 20b provided in the saw blade cover 20 by piping (see FIG. 2). Therefore, the first dust collecting chamber 3 a and the saw blade cover 20 are connected by piping through the intake port member 33.
The intermediate wall member 31 has an outlet hole 31c as shown in FIG. One end of the outlet hole 31c opens to the first dust collecting chamber 3a, and the other end is connected to the cyclone unit 3c by piping. Therefore, the first dust collecting chamber 3a and the cyclone unit 3c are connected by piping through the outlet hole 31c. The outlet hole 31 c is formed at a position higher than the intake port member 33.

As shown in FIG. 9, the cyclone unit 3 c is provided between the first dust collection chamber 3 a and the second dust collection chamber 3 b, and includes a cyclone main body 36 and an exhaust port member 37.
The cyclone body 36 integrally has a cylindrical upper cylindrical portion 36a and a cylindrical lower cylindrical portion 36b whose diameter gradually decreases from the upper cylindrical portion 36a downward.

The intake port 36c is formed in the outer peripheral surface of the upper cylinder part 36a, and the intake port 36c and the outlet hole 31c are connected by piping.
The intake port 36c is provided at a position eccentric from the axial center of the upper cylindrical portion 36a, and extends in a substantially horizontal direction and in a direction tangential to the outer peripheral surface of the upper cylindrical portion 36a. Therefore, the air and chips sent from the intake port 36c rotate in the circumferential direction along the wall surface of the upper cylindrical portion 36a (see FIG. 4). Then, the chips gradually fall while rotating, and are discharged toward the second dust collecting chamber 3b from the chip discharge port 36d formed at the lower end of the lower cylindrical portion 36b (see FIG. 9).

As shown in FIG. 9, the exhaust port member 37 includes a donut disk-shaped disk part 37a and a cylindrical exhaust pipe part 37b that passes through the center of the disk part 37a.
As shown in FIG. 5, the disk part 37a is attached so as to cover the upper opening of the upper cylinder part 36a. The exhaust pipe portion 37 b is disposed so as to extend in the axial direction at the axial center of the cyclone main body 36. And the exhaust pipe part 37b has the exhaust port 37b1 in the upper end part, and has the intake port 37b2 in the lower end part. Therefore, the air sent into the cyclone main body 36 passes through the center of the cyclone main body 36 and is exhausted from the exhaust port 37b1 at the top of the cyclone main body 36.
A wire net 37c for preventing mischief is provided near the upper end of the exhaust pipe portion 37b. The metal mesh 37c is a member that prevents foreign matter from being inserted into the exhaust pipe portion 37b, and has a sufficiently large mesh that does not cause resistance to air flow.

The second dust collecting chamber 3b is formed in a hollow shape between the second outer wall member 32 and the intermediate wall member 31, as shown in FIGS.
The second outer wall member 32 has an intake port 32a as shown in FIG. One end of the intake port 32a opens into the second dust collection chamber 3b, and the other end is connected to the chip discharge port 36d of the cyclone main body 36 by piping. Therefore, the chips separated from the air in the cyclone unit 3c are discharged from the intake port 32a into the second dust collecting chamber 3b.
The cyclone unit 3c attached to the intake port 32a is attached in a state inclined about 25 ° (for example, 25 ° ± 10 °) from the vertical line as shown in FIG. Therefore, sufficient space for discharging chips is secured below the intake port 32a.

As shown in FIGS. 6 and 12, the dust collecting container 3 has a lid 34 for discarding chips and a latching member 35 for latching the lid 34.
The lid 34 extends across the first dust collection chamber 3a and the second dust collection chamber 3b as shown in FIG. 7, and the first dust collection chamber 3a and the second dust collection chamber 3b. A part of the bottom surface is formed.
As shown in FIG. 9, the lid 34 has a rotation shaft portion 34 a on one end edge side, and the rotation shaft portion 34 a is rotatable with respect to the first outer wall member 30 and the second outer wall member 32. Mounted.

As shown in FIG. 9, the latching member 35 has a pair of rotating shaft portions 35 b on the left and right ends of the intermediate portion. It can be tilted in the front-rear direction.
A claw portion 35a is formed at the lower end portion of the latch member 35, and the claw portion 35a is latched on the lower surface of the lid 34 as shown in FIG. As shown in FIG. 9, an elastic member 38 (for example, a coil spring) that urges the hooking member 35 is provided between the upper end portion of the hooking member 35 and the first outer wall member 30. The claw portion 35a is biased in a direction in which the claw portion 35a is latched with the lid 34.

The dust collecting container 3 is provided with angle adjusters (30b, 33b, etc.) for adjusting the angle of the dust collecting container 3 with respect to the saw blade cover 20 (see FIGS. 10 and 11).
As shown in FIG. 9, the angle adjuster is provided between the intake port member 33 and the first outer wall member 30 and between the intake port member 33 and the intermediate wall member 31. The intake port member 33 is provided with a rotation shaft portion 33a, and the rotation shaft portion 33a is provided with a rotation restricting portion 33b. On the other hand, the first outer wall member 30 and the intermediate wall member 31 are provided with rotation support portions 30a and 31a and force receiving portions 30b and 31b.

The rotation shaft portion 33 a is formed in a substantially cylindrical shape, and is rotated around the axis by the rotation support portion 30 a formed on the first outer wall member 30 and the rotation support portion 31 a formed on the intermediate wall member 31. Is supported rotatably. Therefore, the dust collecting container 3 tilts up and down with respect to the saw blade cover 20 around the rotation shaft portion 33a.
The rotation restricting portion 33b is formed so as to protrude from a part of the outer peripheral surface of the rotation shaft portion 33a, and the force receiving formed on the first outer wall member 30 as the rotation shaft portion 33a rotates. The portion 30b and the force receiving portion 31b formed on the intermediate wall member 31 are brought into contact with and separated from each other.
The force receiving portions 30b and 31b are formed by cutting out the rotation support portions 30a and 31a.

Below, the cutting method of the cutting material W by the slide circular saw 1 is demonstrated.
First, the circular saw body 2 is lifted by about 40 ° as shown in FIG. In this state, the cutting material W is set on the upper surface of the table 11. The dust collecting container 3 is held in a substantially horizontal state because it is in contact with the second slide body 13.
Next, the saw blade 14 is rotated in the arrow R direction by the electric motor 22. Then, the circular saw body 2 is tilted downward by about 15 ° from the state of FIG. 13, and the circular saw body 2 is inclined by about 25 ° from the horizontal line as shown in FIG.
As a result, the intake port member 33 tilts approximately 15 ° counterclockwise from the state shown in FIG. And the rotation control part 33b provided in the intake port member 33 contact | abuts to the force receiving part 30b.

  Next, the circular saw body 2 is tilted by about 25 ° from the state shown in FIG. 14 toward the lower position shown in FIG. 15 to bring the circular saw body 2 into a substantially horizontal state (lower position). As a result, the intake port member 33 is further tilted by about 25 ° in the counterclockwise direction as shown in FIG. Then, the rotation restricting portion 33b of the intake port member 33 pushes the force receiving portion 30b, and the entire dust collecting container 3 tilts 25 ° ± 5 ° in the upward direction together with the intake port member 33. Then, the cyclone unit 3c is in a substantially vertical state (90 ° ± 5 °), and the intake port member 33 is inclined at about 40 ° from the horizontal line.

  When the circular saw body 2 is tilted from the state of FIG. 14 toward the state of FIG. 15, the cutting material W starts to be cut by the saw blade 14. Then, chips are generated by cutting the cutting material W, and the chips are blown up with the air to the upper right in FIG. Then, the chips are sent to the dust collecting container 3 through the hollow portion 20a of the saw blade cover 20 and the discharge port 20b.

The chips and air are sent to the first dust collecting chamber 3a through the intake port member 33 as shown in FIGS. Of the chips, the relatively large-sized chips fall by gravity in the first dust collection chamber 3a and are stored in the first dust collection chamber 3a. On the other hand, small chips that have not fallen due to gravity are sent to the intake 36c of the cyclone body 36 together with air.
A wall portion 31d is provided in the first dust collecting chamber 3a to prevent chips from being sent to the intake port 36c as shown in FIG. The wall portion 31d is formed on the intermediate wall member 31, and projects below the intake port 36c. Therefore, large chips are suppressed from being sent to the intake port 36c by the wall 31d.

As shown in FIG. 4, the chips sent to the intake port 36 c gradually fall while rotating in the direction of arrow T along the wall surface of the cyclone main body 36. Therefore, the small chips that have not dropped in the first dust collection chamber 3a are separated from the air using centrifugal force and sent to the second dust collection chamber 3b. On the other hand, the air is exhausted above the cyclone main body 36 through the exhaust pipe portion 37b.
The cyclone unit 3c is configured to efficiently separate chips and air in a state close to vertical, and is held in a state close to vertical during cutting.

  When the circular saw body 2 is set to the lower position, the dust collecting container 3 is moved upward as shown in FIGS. Therefore, the chips are easily stored on the lower left side of the first dust collecting chamber 3a and on the lower left side of the second dust collecting chamber 3b. Thus, the place where the chips are collected becomes far from the outlet hole 31c or the intake port 32a, and a lot of chips can be stored in the first dust collection chamber 3a and the second dust collection chamber 3b.

As described above, large chips are stored in the first dust collecting chamber 3a, and small chips are stored in the second dust collecting chamber 3b. The second dust collection chamber 3b can also be used as a sub-tank when the first dust collection chamber 3a is full.
When the cutting material W is larger than the saw blade 14 as shown in FIG. 1, the circular saw body 2 is pushed toward the right side of FIG. As a result, the circular saw body 2 is slid to the right in FIG. 1 by the first slide body 12 and the second slide body 13, and the cutting material W can be cut by the saw blade 14.

  After cutting, the circular saw body 2 is lifted (see FIG. 14). As a result, the dust collection container 3 is tilted together with the circular saw body 2, the right side of the circular saw body 2 is gradually lowered, and the dust collection container 3 comes into contact with the second slide body 13. When the circular saw body 2 is further tilted upward in this state (see FIG. 13), the intake port member 33 is rotated as shown in FIG. 11, and the rotation restricting portion 33b is the force receiving portion 30b, Separated from 31b. Then, the intake port member 33 idles with respect to the main body of the dust collecting container 3. For example, it idles 15 ° ± 5 °. Accordingly, the circular saw body 2 can be further tilted upward while maintaining the dust collecting container 3 in a substantially horizontal state, and the circular saw body 2 is tilted upward to an inclination angle of about 40 ° ± 5 ° from the horizontal line. be able to.

  When discarding the chips accumulated in the first dust collection chamber 3a and the second dust collection chamber 3b, first, the dust collection container 3 is removed from the circular saw body 2. Then, as shown in FIGS. 5 and 12, the upper end portion of the latching member 35 is pushed to tilt the latching member 35 against the elastic member 38. Then, the hook 35a is released from the lid 34. Then, the lid 34 is rotated about the rotation shaft portion 34a, the first dust collection chamber 3a and the second dust collection chamber 3b are simultaneously released by the lid 34, and the first dust collection chamber 3a and the second dust collection chamber 3a are released. The chips stored in the dust collection chamber 3b are discarded at once.

The first embodiment is formed as described above.
That is, the dust collecting container 3 has a first dust collecting chamber 3a, a cyclone unit 3c, and a second dust collecting chamber 3b as shown in FIG. The first dust collecting chamber 3a is configured to drop the chips blown from the saw blade 14 side together with air by gravity and store the dropped chips.
The cyclone unit 3c is a cyclone main body 36 that rotates and drops along the wall surface the chips that are sent together with the air from the first dust collection chamber 3a side without falling in the first dust collection chamber 3a, A chip discharge port 36d for discharging chips toward the second dust collecting chamber 3b below the cyclone main body 36 and an exhaust port 37b1 for discharging air above the cyclone main body 36 are provided. The chips and air are separated by the first dust collecting chamber 3a and the cyclone unit 3c, and the dust collecting container 3 is not provided with a cloth filter for separating the chips and air.

  Therefore, the chips generated on the saw blade 14 side are blown up with the air by the rotation of the saw blade 14 and sent to the first dust collecting chamber 3a. In the first dust collection chamber 3a, the chips fall by gravity and are stored in the first dust collection chamber 3a. The chips that have not fallen in the first dust collection chamber 3a are sent to the cyclone unit 3c and separated from the air by using the centrifugal force generated in the cyclone unit 3c. Then, the chips separated by the cyclone unit 3c are discharged to the second dust collecting chamber 3b, and air is exhausted from the exhaust port 37b1 of the cyclone unit 3c.

  Thus, large chips are stored in the first dust collecting chamber 3a, and small chips are stored in the second dust collecting chamber 3b. The dust collecting container 3 is not provided with a cloth filter for separating chips and air. Therefore, the flow of air blown up by the rotation of the saw blade 14 is not hindered by the cloth filter. Further, since the cloth filter is not provided, there is no problem that the filter cloth is clogged with chips and the dust collecting ability is gradually lowered. Thus, the chips generated by the saw blade 14 can be efficiently collected in the dust collecting container 3.

Between the saw blade cover 20 and the dust collecting container 3, angle adjusters (30b, 33b, etc.) for adjusting the relative angle of the dust collecting container 3 to the saw blade cover 20 are provided as shown in FIGS. ing.
Therefore, the angle of the dust collecting container 3 can be adjusted to a suitable angle by the angle adjuster. For example, the angle of the dust collecting container 3 can be adjusted to an angle at which the efficiency of the cyclone unit 3c is suitable.

  In this embodiment, the relative angle between the saw blade cover 20 and the dust collecting container 3 when the saw blade cover 20 is at the upper position is smaller than the relative angle when the saw blade cover 20 is at the lower position by the angle adjuster. It is adjusted to become. That is, as shown in FIG. 13, when the saw blade cover 20 is set to the upper position, the relative angle between the saw blade cover 20 and the dust collecting container 3 is 140 ° ± 5 °. On the other hand, when the saw blade cover 20 is in the lower position, the angle is 155 ° ± 5 ° as shown in FIG. At this time, the cyclone unit 3c is substantially vertical.

Therefore, when the saw blade cover 20 is set to the upper position, the dust collecting container 3 comes close to the saw blade cover 20. Therefore, the dust collecting container 3 is less likely to get in the way, and the saw blade cover 20 can be tilted sufficiently upward.
On the other hand, when the saw blade cover 20 is set to the lower position, the angle of the dust collecting container 3 with respect to the saw blade cover 20 is widened. For this reason, the change in the angle of the dust container 3 with respect to the ground is smaller than the change in the angle of the saw blade cover 20 with respect to the ground. Specifically, the angle change of the dust collecting container 3 is 25 ° ± 5 ° with respect to the angle change of the saw blade cover 20 being 40 ° ± 5 °. Therefore, the cyclone unit 3c is prevented from being largely inclined with respect to the ground. As a result, it is possible to prevent a phenomenon in which the cyclone unit 3c is greatly inclined and the separation ability of the chips and air by the cyclone unit 3c is reduced.

As shown in FIGS. 9 and 12, the dust collection container 3 has one lid 34 that extends across the first dust collection chamber 3 a and the second dust collection chamber 3 b, and the one lid 34. Is configured such that the chips in both dust collection chambers 3a and 3b can be discarded by opening the.
Therefore, by opening one lid 34, the chips stored in the first dust collection chamber 3a and the second dust collection chamber 3b can be discarded at a time.

(Embodiment 2)
A second embodiment will be described with reference to FIGS.
The second embodiment is formed in substantially the same manner as the first embodiment, but has a dust collecting container 4 shown in FIG. 16 instead of the dust collecting container 3 shown in FIG. The dust collection container 4 is formed in substantially the same manner as the dust collection container 3 according to Embodiment 1, but the position of the lid is different. Hereinafter, the dust collecting container 4 according to Embodiment 2 will be described focusing on the different points.

As shown in FIG. 16, the dust collection container 4 has a first dust collection chamber 4a, a cyclone unit 4c, and a second dust collection chamber 4b.
As shown in FIGS. 17 and 20, the first dust collection chamber 4a and the second dust collection chamber 4b are respectively a first cylinder member 40 and a second cylinder formed into a bottomed cylinder by blow molding or the like. The member 42 is formed. And the right side opening part of the 1st cylinder member 40 and the right side opening part of the 2nd cylinder member 42 are covered by the one lid | cover 44 formed in plate shape by injection molding so that opening and closing is possible.

On both sides of the upper end of the lid 44, there are formed rotating arm portions 44b that are rotatably attached to the first cylinder member 40 and the second cylinder member 42 as shown in FIG. At the lower end portion, as shown in FIG. 19, a latching portion 44 c that is latched on the lower surface of the second cylindrical member 42 is formed.
The lid 44 has a mounting opening 44a as shown in FIG. The attachment opening 44a opens to the first dust collection chamber 4a and is connected to the saw blade cover 20 shown in FIG. 4 by piping.

The cyclone unit 4c has a cyclone main body 46 and an exhaust port member 47 as shown in FIG. The cyclone body 46 integrally has a cylindrical upper cylindrical portion 46a and a cylindrical lower cylindrical portion 46b whose diameter gradually decreases from the upper cylindrical portion 46a downward.
Between the upper cylinder part 46a and the 1st cylinder member 40, the piping member 41 which connects these by piping is formed. One end of the piping member 41 is connected to the upper position of the first tubular member 40 by piping.

The other end portion of the piping member 41 is connected to a position eccentric from the axis of the upper cylindrical portion 46a. And the piping member 41 is extended in the substantially horizontal direction and the outer peripheral surface tangent direction of the upper side cylinder part 46a. As shown in FIG. 19, a chip discharge port 46d through which chips are discharged is formed at the lower end of the lower cylindrical portion 46b, and the chip discharge port 46d opens into the second dust collecting chamber 4b. is doing.
Further, the cyclone unit 4c is mounted in an inclined state with respect to the second cylindrical member 42 as shown in FIG. 16, and is substantially vertical (for example, 90 ° ± 5 °) when the saw blade body is in the lower position. (See FIG. 2).

As shown in FIGS. 16 and 19, the exhaust port member 47 has a donut disk-shaped disk part 47a and a cylindrical exhaust pipe part 47b inserted through the disk part 47a.
The disk part 47a is attached so as to cover the upper opening of the upper cylinder part 46a. The exhaust pipe portion 47 b is disposed so as to extend in the axial direction at the axial center of the cyclone main body 46. The upper end portion has an exhaust port 47b1, and the lower end portion has an intake port 47b2.

(Other embodiments)
The present invention is not limited to the first and second embodiments, and may be the following modes.
(1) That is, the circular saw according to the first and second embodiments is a slide circular saw, and the circular saw body is configured to move in the horizontal direction with respect to the base and tilt in the vertical direction. However, the circular saw body does not slide horizontally, but is a tabletop circular saw that tilts vertically with respect to the base, and the dust collecting container according to the first and second embodiments is attached to the circular saw body of the tabletop circular saw. It may be a form. Or it is a portable circular saw which does not have a base and a table, Comprising: The form by which the dust collecting container which concerns on Embodiment 1, 2 may be attached to this circular saw may be sufficient.
(2) The angle adjuster according to the first embodiment has a configuration in which the rotation restricting portion and the force receiving portion are separated from each other when the dust collecting container is in a horizontal state as shown in FIGS. . However, the angle adjuster may be configured to gradually reduce the relative angle between the dust collecting container and the circular saw body when the circular saw body is tilted upward.
(3) The angle adjuster according to the first embodiment is provided in the dust collection container. However, the angle adjuster may be provided on the saw blade cover side or the circular saw body side.

1 is a perspective view of a slide circular saw according to Embodiment 1. FIG. It is a front view of the slide circular saw which concerns on Embodiment 1 when a circular saw main body and a saw blade cover are made into a down position. It is a front view of the slide circular saw which concerns on Embodiment 1 at the time of setting a circular saw main body and a saw blade cover to an upper position. 3 is a top view of the slide circular saw according to Embodiment 1. FIG. 2 is a perspective view of a dust collection container according to Embodiment 1. FIG. 3 is a front view of the dust collection container according to Embodiment 1. FIG. FIG. 7 is a cross-sectional view taken along line AA in FIG. 6. 3 is an exploded perspective view of the dust collection container according to Embodiment 1. FIG. 3 is a perspective view of a constituent member of the dust collecting container according to Embodiment 1. FIG. It is a front enlarged view of the 1st outer wall member and intake port member of a dust collecting container in the state of FIG. It is a front enlarged view of the 1st outer wall member and intake port member of the dust collecting container in the state of FIG. It is a front view of the dust collecting container concerning Embodiment 1 when a lid is opened. 3 is a schematic diagram of a slide circular saw according to Embodiment 1. FIG. 3 is a schematic diagram of a slide circular saw according to Embodiment 1. FIG. 3 is a schematic diagram of a slide circular saw according to Embodiment 1. FIG. 6 is a perspective view of a dust collection container according to Embodiment 2. FIG. 6 is a top view of a dust collection container according to Embodiment 2. FIG. It is a right view of the dust collecting container from the arrow B direction of FIG. It is the arrow CC sectional view taken on the line of FIG. It is the arrow DD sectional view taken on the line in FIG.

Explanation of symbols

1 ... Slide circular saw (circular saw)
2 ... Circular saw body 3, 4 ... Dust collection containers 3a, 4a ... First dust collection chambers 3b, 4b ... Second dust collection chambers 3c, 4c ... Cyclone unit 10 ... Base 11 ... Table 14 ... Saw blade 20 ... Saw blade cover 30 ... first outer wall members 30b, 31b ... force receiving portion (angle adjuster)
31 ... Intermediate wall member 32 ... Second outer wall member 33 ... Inlet port member 33b ... Rotation restricting portion (angle adjuster)
34, 44 ... lid 35 ... retaining member 36, 46 ... cyclone body 36d, 46d ... chip discharge port 37, 47 ... exhaust port member 37a, 47a ... disc part 37b ... exhaust pipe part 37b1, 47b1 ... exhaust port W ... Cutting material

Claims (2)

A saw blade cover that covers the saw blade, and a dust collecting container that is piped to the saw blade cover, and the chips are blown up toward the dust collecting container by the rotation of the disk-shaped saw blade. A circular saw with a dust collection container collected in a dust collection container,
The dust collecting container has a first dust collecting chamber, a cyclone unit, and a second dust collecting chamber in order to separate the blown-up air from the chips.
The first dust collecting chamber is configured to drop the chips blown up from the saw blade side together with air by gravity and store the dropped chips.
The cyclone unit includes a cyclone main body for rotating and dropping chips that have been sent together with air from the first dust collection chamber side without falling in the first dust collection chamber, and the cyclone thereof. A chip discharge port for discharging the chips toward the second dust collection chamber below the main body, and an exhaust port for exhausting air above the cyclone main body,
Chips and air are separated by the first dust collection chamber and the cyclone unit, and the dust collection container is not provided with a cloth filter for separating chips and air ,
Between the saw blade cover and the dust collecting container, an angle adjuster for adjusting a relative angle of the dust collecting container to the saw blade cover is provided,
The saw blade cover is mounted so as to be tiltable in the vertical direction with respect to the base above the base, and a relative angle between the saw blade cover and the dust collecting container when the saw blade cover is in the upper position. Is configured to be adjusted so as to be smaller than the relative angle when the saw blade cover is moved to the lower position by the angle adjuster . A circular saw with a dust collecting container according to claim 1 ,
The dust collecting container has one lid extending across the first dust collecting chamber and the second dust collecting chamber, and the chips in the two dust collecting chambers are opened by opening the one lid. A circular saw with a dust collection container, characterized in that it can be disposed of.

Images