JP2020040210A - Portable cutting machine - Google Patents

Abstract

To provide a portable cutting machine which prevents chips from clogging a discharge path and achieves excellent maintainability.SOLUTION: A portable cutting machine includes: a motor; a saw blade 17 which is rotated by the motor to cut a cut material; and a housing 20 which covers the saw blade 17 and the motor. The housing 20 forms a chip discharge path 20a which guides chips occurring when the saw blade 17 cuts the cut material. The portable cutting machine includes an attachment member 35 which may be disposed near a chip discharge port 20b which is an outlet of the chip discharge path 20a, and the attachment member 35 may switch a chip discharge direction.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a portable cutting machine characterized by processing of chips generated during cutting.

  As this kind of portable cutting machine, there are known a normal circular saw for discharging chips generated at the time of cutting backward, and a dust collecting circular saw for collecting chips generated at the time of cutting with a dust box or the like. In a circular saw that discharges cuttings backward, a mainstream that guides and discharges cuttings obliquely rearward so that chips do not accumulate in the direction of an operator or a material to be cut is mainly used. However, in such a configuration, it is necessary to forcibly change the discharge direction of the chips by providing a bent discharge path for the chips, so that the force for discharging the chips decreases, Static electricity is generated due to friction between the discharge path and the discharge path, and there is a problem that chips are clogged in the discharge path.

  Regarding such a problem, Patent Literature 1 discloses a portable circular saw having a chip discharge path changing unit that switches between discharging the chip into the saw cover and discharging to the chip discharge channel. I have. In the invention described in Patent Document 1, the provision of the chip discharge path changing means makes it possible to arbitrarily select a chip discharge path according to the cutting work situation and the like, and the flow of the chip into the chip discharge path. When cutting is suppressed, chips pass through the inside of the saw cover as a discharge flow path and are discharged from the rear in the cutting direction, and chips may be clogged in the chip discharge path in the dust cover depending on the cutting work situation. It is said that the workability can be prevented from being reduced.

Japanese Patent No. 4715640

  However, in the invention described in Patent Document 1 described above, the chip discharge path has a shape that surrounds the top, bottom, left, and right, so that the chip discharge path has a shape that is easily clogged with chips. In addition, there is a problem that the shape is difficult to eliminate the clogging of the chips, and the maintainability is poor. In addition, when chips are guided into the saw cover, the chips may fall near the rotation axis of the saw blade, which may cause poor sliding of the lower guard or the like covering the saw blade.

  Therefore, an object of the present invention is to provide a portable cutting machine which prevents clogging of chips in a discharge path and has excellent maintainability.

  The present invention has been made to solve the above-described problems, and has the following features.

  The invention according to claim 1 includes a motor, a saw blade that is rotated by the motor and cuts a workpiece, and a housing that covers the saw blade and the motor. A chip discharge path for guiding chips generated when the blade cuts the material to be cut is formed, and an attachment member that can be disposed near a chip discharge port that is an outlet of the chip discharge path, The chip discharge direction can be switched by an attachment member.

  According to a second aspect of the present invention, in addition to the features of the first aspect of the present invention, when the attachment member is arranged near the chip discharge port, the cutting part discharged from the chip discharge port is provided. The discharge direction of the powder is formed so as to be changed by the attachment member, and when the attachment member is not disposed near the chip discharge port, the discharge direction of the chip discharged from the chip discharge port is changed to the attachment member. Is formed so as not to change.

  According to a third aspect of the present invention, in addition to the features of the first or second aspect of the present invention, the attachment member includes at least a mounting position near the chip discharge port, and a position of the mounting position. Can be fixed to different accommodation positions.

  According to a fourth aspect of the present invention, in addition to the features of the third aspect of the present invention, the attachment member allows the mounting position and the storage position to be mutually separated without being separated from the portable cutting machine. It is characterized by being movable.

  The invention according to claim 5 includes, in addition to the features of the invention according to any one of claims 1 to 4 described above, a dust box for collecting chips, wherein the dust box is provided in place of the attachment member. It can be mounted near the swarf discharge port.

  The invention according to claim 1 is as described above, and includes an attachment member that can be arranged near a chip discharge port that is an exit of a chip discharge path, and the discharge direction of the chip can be switched by the attachment member. . According to such a configuration, the direction in which chips are discharged can be switched depending on the environment in which the portable cutting machine is used. For example, when a portable cutting machine is used in a direction in which chips are likely to be clogged, clogging of chips can be prevented by changing the direction in which chips are discharged by the attachment member as little as possible. Further, when it is desired to prevent chips from falling on the portable cutting machine or the material to be cut as much as possible, it is possible to prevent chips from falling by changing the direction in which chips are discharged by the attachment member.

  Further, the invention according to claim 2 is as described above, and when the attachment member is arranged near the chip discharge port, the discharge direction of the chip discharged from the chip discharge port is changed by the attachment member. When the attachment member is not arranged near the chip discharge port, the discharge direction of the chip discharged from the chip discharge port is formed so as not to be changed by the attachment member. According to such a configuration, when the attachment member is arranged near the chip discharge port, the discharge direction of the chip can be changed by the attachment member. Therefore, it is possible to guide the chips so that the chips do not accumulate in the direction of the worker and the material to be cut. On the other hand, when the attachment member is not disposed in the vicinity of the chip discharge port, the chip is directly discharged from the chip discharge port, so that the direction in which the chip is discharged is not changed by the attachment member. Therefore, the momentum of the discharge is not reduced by the attachment member, and the accumulation of the chips can be suppressed.

  The invention according to claim 3 is as described above, and the attachment member can be fixed to at least a mounting position near the chip discharge port and a housing position different from the mounting position. According to such a configuration, the attachment member can be arranged at the accommodation position even when the attachment member is not used. Therefore, the attachment member that is not used can be attached to the portable cutting machine, so that the attachment member can be prevented from being lost. In addition, when the attachment member is used, the attachment member at the accommodation position can be moved and used, so that workability is good.

  Further, the invention according to claim 4 is as described above, and the attachment member can move between the mounting position and the accommodation position without being separated from the portable cutting machine. According to such a configuration, the attachment member is not separated from the portable cutting machine when the attachment member is moved, so that the attachment member can be prevented from being dropped or lost.

  The invention according to claim 5 is as described above, and includes a dust box for collecting chips, and the dust box can be mounted near the chip discharge port instead of the attachment member. That is, when used without the dust box attached, it can be used as a normal circular saw without a dust collecting function, and when used with the dust box attached, it can be used as a dust collecting circular saw. According to such a configuration, it is possible to provide a single product with the functions of both a normal circular saw and a dust collecting circular saw, which were conventionally separate products. At this time, since the dust box is arranged near the chip discharge port with the attachment member removed, the position of the chip introduction port connected to the chip discharge port is arranged forward of the cutting direction by the amount of the attachment member. can do. Therefore, the capacity of the dust box can be increased as much as possible while the overall length of the machine is reduced as much as possible.

It is a figure concerning a 1st embodiment, and is an outline view of a portable cutting machine in the state where an attachment member was arranged in a mounting position. It is a figure concerning a 1st embodiment, and is a top view of a portable cutting machine in the state where an attachment member was arranged in a mounting position. It is a figure concerning a 1st embodiment, and is a sectional view of a portable cutting machine in the state where an attachment member was arranged in a mounting position. It is a figure concerning a 1st embodiment, and is an outline view of a portable cutting machine which is moving an attachment member. It is a figure concerning a 1st embodiment, and is an outline view of a portable cutting machine in the state where an attachment member was arranged in an accommodation position. It is a figure concerning a 1st embodiment, and is an external view of a portable cutting machine in the state where a dust box was attached. It is a figure concerning a 1st embodiment, and is a top view of a portable cutting machine in the state where a dust box was attached. It is a figure concerning a 1st embodiment, and is a sectional view of a portable cutting machine in the state where a dust box was attached. It is a figure concerning a 2nd embodiment, and is an outline view of a portable cutting machine in the state where an attachment member was arranged in an accommodation position. It is a figure concerning a 2nd embodiment, and is an external view which looked at a portable cutting machine which is moving an attachment member from the front. It is a figure concerning a 2nd embodiment, and is an appearance view which looked at a portable cutting machine in the state where an attachment member was arranged at an accommodation position from the front. It is a figure concerning 3rd Embodiment, and is an external view of the portable cutting machine in the state where the attachment member was arrange | positioned at the mounting position. It is a figure concerning 3rd Embodiment, and is an external view of the portable cutting machine which is moving the attachment member. It is a figure concerning a 3rd embodiment, and is an outline view of a portable cutting machine in the state where an attachment member was arranged in an accommodation position. It is a figure concerning a 3rd embodiment, and is a sectional view of a portable cutting machine in the state where an attachment member was arranged in an accommodation position.

(First embodiment)
A first embodiment of the present invention will be described with reference to FIGS.

  As shown in FIGS. 1 to 3, the portable cutting machine 10 according to the present embodiment includes a cutting machine main body 15 that rotatably supports a saw blade 17 and a base 11 attached to a lower portion of the cutting machine main body 15. , Is provided.

  The base 11 is a metal plate-shaped member that comes into contact with the material to be cut, and cuts the material to be cut below the base 11 by exposing a part of the saw blade 17 from the opening 11 a formed through. It is formed so that it can be done.

  The cutting machine body 15 is entirely covered by a housing 20. The housing 20 according to the present embodiment is formed by combining a plurality of members, and includes a main cover 21, a motor housing 30, and a saw cover 31.

  The main cover 21 is a cover that incorporates a gear mechanism, a control board, and the like. A motor housing 30 is fixed to the left side of the main cover 21 when viewed in the cutting direction of the saw blade 17, and a saw cover 31 is fixed to the right side. The main cover 21 includes a grip part 22, a gear cover part 23, and a battery mounting part 28.

  The grip portion 22 is provided above the gear cover portion 23 so as to be gripped by an operator, and is formed in a rod shape substantially parallel to the cutting direction of the saw blade 17. A trigger 18 for performing a cutting operation is operably provided inside the grip portion 22. The trigger 18 is arranged at a position where the index finger touches when the operator grips the grip portion 22, and when the operator pulls the trigger 18, a motor (to be described later) rotates and the saw blade 17 is rotated. Is designed to rotate.

  The gear cover portion 23 is a portion for housing a gear operated by a motor, and is provided closer to the saw cover 31 than the grip portion 22 in plan view, as shown in FIG. In the present embodiment, an attachment member 35 described below can be arranged on the upper surface of the gear cover 23. The gear cover portion 23 is provided with a slide groove 23a for guiding the slide of the attachment member 35 and an attachment accommodating portion 24 for accommodating the attachment member 35. The attachment accommodating portion 24 according to the present embodiment is provided between the grip portion 22 and the saw cover 31 in a plan view, and is recessed on the surface of the housing 20.

  The battery mounting section 28 is provided behind the grip section 22. The battery 19 is detachable from the lower surface of the battery mounting section 28. The battery 19 has a built-in secondary battery and is used as a drive source for a motor and a control device.

  The motor housing 30 is a part that houses a motor (not shown). As shown in FIG. 2 and the like, the motor housing 30 is provided so as to protrude to the opposite side of the saw blade 17 with the grip portion 22 interposed therebetween. When the motor built in the motor housing 30 rotates, the rotational force of the motor is transmitted to the rotating shaft 17a of the saw blade 17 via a gear. In this way, the saw blade 17 is rotated by the motor, and the material to be cut can be cut.

  The saw cover 31 covers the upper part of the saw blade 17 together with the main cover 21. In the present embodiment, an attachment member 35 described later can be arranged also on the upper part of the saw cover 31. The saw cover 31 is provided with a slide groove 31 a for guiding the slide of the attachment member 35. The sliding groove 31a is formed so as to be continuous with the sliding groove 23a of the gear cover 23, so that the attachment member 35 can slide on the saw cover 31 and the gear cover 23.

  Note that inside the housing 20, there is formed a chip discharge path 20a for guiding chips generated when the saw blade 17 cuts the workpiece. Specifically, as shown in FIG. 3, a gap is provided between the housing 20 (saw cover 31 and main cover 21) and the saw blade 17 so that chips can pass therethrough. A path 20a is formed. The chip discharge path 20 a is provided on the front side in the cutting direction of the saw blade 17 and is formed along the outer periphery of the saw blade 17. Therefore, when the saw blade 17 rotates and cuts the material to be cut, the generated chips are wound up by the saw blade 17 and are vigorously guided to the chip discharge path 20a. . In addition, this chip discharge path 20a does not have a wall on the side of the saw blade 17 (there is no wall between the outer peripheral wall of the chip discharge path 20a and the saw blade 17). The saw blade 17 side is open. For this reason, the structure is such that chip clogging is unlikely to occur.

  The chip discharge port 20b, which is the outlet of the chip discharge path 20a, is open above the saw blade 17. In addition, the chip discharge port 20 b is open ahead of the rotation shaft 17 a of the saw blade 17. By opening the chip discharge port 20b as far forward as possible, when a dust box 45 described later is attached, chips can be guided to the dust box 45 by making full use of the discharge force of the chip, thereby improving the dust collection effect. be able to. In addition, since the dust box 45 can be disposed closer to the front, the capacity of the dust box 45 can be increased while reducing the overall length of the machine without projecting the dust box 45 backward.

  In the present embodiment, the attachment member 35 can be arranged on an extension of the chip discharge port 20b. The direction in which the chips are discharged can be switched depending on whether or not the attachment member 35 is arranged on an extension of the chip discharge port 20b.

  In the present embodiment, the attachment member 35 can be disposed on an extension of the chip discharge port 20b. However, the attachment member 35 is disposed at least in the vicinity of the chip discharge port 20b that can change the discharge direction of the chip. If possible. That is, the chip guide portion 36 of the attachment member 35 faces the chip discharge port 20b, and the attachment member 35 is located at a position where the chips discharged from the chip discharge port 20b are continuously guided to the chip guide portion 36. It is only necessary to be able to arrange.

The attachment member 35 is a member movably attached to the surface of the housing 20, and includes a chip guide portion 36 that can be disposed so as to be continuous with the chip discharge port 20b, as shown in FIGS. ing. The chip guide portion 36 includes an upper wall 36a, a lower wall 36b, and an inclined surface 36c, and is surrounded in three directions. In other words, the anti-grip portion 22 side (the right side when the grip portion 22 is gripped) has an open shape, and is formed so as to discharge chips from the open surface to the outside. The inclined surface 36c is provided to be inclined with respect to the cutting direction (front-back direction) of the saw blade 17, and is disposed so as to face obliquely to the chip discharge port 20b. The inclined surface 36c is inclined toward the anti-grip portion 22 side (right side when the grip portion 22 is gripped) toward the rear, so that the chips discharged from the chip discharge port 20b can be inclined on the inclined surface 36c. Along the right rear. Since the chips are guided to the rear right as described above, the structure is such that the chips do not easily fall on the body of the right-handed worker. Note that the tip of the chip guide portion 36 (the tip of the inclined surface 36c) is disposed behind the rotation shaft 17a of the saw blade 17. By arranging the inclined surface 36c as rearward as possible, the chips are guided as rearwardly as possible, and the chips and the workpiece are prevented from falling down.

  The attachment member 35 according to the present embodiment is slidable on the surface of the housing 20, as shown in FIGS. A pair of sliding protrusions 38 protruding in the front-rear direction are formed at a lower portion of the attachment member 35, and the sliding protrusions 38 slide on sliding grooves 23 a of the gear cover 23 and the sliding grooves 31 a of the saw cover 31. By movably engaging, the slide of the attachment member 35 is guided. As shown in FIG. 4, the attachment member 35 is slidable in parallel with the rotation axis 17a of the saw blade 17. When the attachment member 35 is slid in the direction of the grip portion 22 and then moved downward, as shown in FIG. 5, the attachment member 35 is fitted into and fixed to the attachment accommodating portion 24 of the gear cover portion 23. It has become. A knob 37 is formed on the upper surface of the attachment member 35 so as to protrude. The knob 37 is for facilitating the lifting of the attachment member 35 accommodated in the attachment accommodating portion 24, and is formed so that the operator can operate the knob 37 by hand.

  In this manner, the attachment member 35 is fixed to the mounting position on the extension of the chip discharge port 20b as shown in FIG. 1 and the storage position not on the extension of the chip discharge port 20b as shown in FIG. It is possible. Therefore, the attachment member 35 is arranged at the mounting position when in use, and is arranged at the accommodation position when not in use. In addition, since the attachment member 35 is slidably attached, the attachment position and the accommodation position can be mutually moved without being separated from the portable cutting machine 10. With such a configuration, the attachment member 35 is prevented from falling or being lost.

  By the way, the portable cutting machine 10 according to the present embodiment can be used with the dust box 45 attached. That is, in a state where the attachment member 35 is fixed at the accommodation position, as shown in FIGS. 6 to 8, the dust box 45 can be mounted on the extension of the chip discharge port 20 b instead of the attachment member 35. The dust box 45 is a member attached to the outside of the housing 20 for collecting chips. As shown in FIG. 8, the dust box 45 includes a chip introduction port 45a arranged to be continuous with the chip discharge port 20b, a chip storage portion 45b for accommodating chips, and a chip storage section 45b. And a guide plate 45c for guiding chips coming from the powder inlet 45a to the inside of the chip storage portion 45b. When the portable cutting machine 10 is used with the dust box 45 attached, the chips passing through the chip discharge path 20a enter the inside of the dust box 45 from the chip introduction port 45a, and are stored in the chip storage portion 45b. It has become. Note that if the inside of the dust box 45 is sealed, the air pressure in the dust box 45 may increase and a sufficient dust collecting effect may not be obtained. Therefore, an air hole communicating with the outside may be provided in the chip storage portion 45b. The air hole can be provided, for example, on the back side of the guide plate 45c. If an air hole is provided on the back side of the guide plate 45c, air can escape while preventing chips in the chip storage portion 45b from spilling outside.

  The accommodation position of the attachment member 35 is a position that does not hinder the attachment of the dust box 45. That is, since the attachment accommodating portion 24 is provided closer to the grip portion 22 than the chip discharge port 20b, the accommodating position of the attachment member 35 is closer to the grip portion 22 than the dust box 45, and the chip discharge port 20b is provided. The attachment member 35 is formed so as not to interfere with the dust box 45 even when the dust box 45 is attached on an extension of the above.

(Second embodiment)
A second embodiment of the present invention will be described with reference to FIGS. Note that the basic configuration of the present embodiment is not different from that of the first embodiment, and thus only different portions will be described, avoiding redundant description.

  The attachment member 35 according to the present embodiment is formed movably with respect to the housing 20 with a structure different from that of the first embodiment. That is, as shown in FIG. 9, the attachment member 35 according to the present embodiment slides in the direction of the grip portion 22 in parallel with the rotation axis 17 a of the saw blade 17 from the mounting position, and then moves forward in the cutting direction. And slidable. That is, as shown in FIG. 10, the attachment accommodating portion 25 is provided ahead of the attachment member 35 at the mounting position in the cutting direction. The attachment accommodating portion 25 is formed on the surface of the housing 20 so that the attachment member 35 can be locked. As shown in FIG. 11, the attachment member 35 can be brought into the housed state by locking the attachment member 35 to the attachment housing portion 25.

  Although not shown in the drawings, the dust box 45 can be mounted in the second embodiment, similarly to the first embodiment, with the attachment member 35 disposed at the accommodation position.

(Third embodiment)
A third embodiment of the present invention will be described with reference to FIGS. Note that the basic configuration of the present embodiment is not different from that of the first embodiment, and thus only different portions will be described, avoiding redundant description.

  The attachment member 35 according to the present embodiment is formed movably with respect to the housing 20 with a structure different from that of the first embodiment. That is, the attachment member 35 according to the present embodiment can be moved relative to the mounting position and the accommodation position by rotating with respect to the housing 20.

  In the present embodiment, as shown in FIG. 15, the attachment member 35 is provided with a rotating shaft 39 that projects in the front-rear direction. In the vicinity of the attachment accommodating portion 26 of the gear cover portion 23, a shaft supporting portion 26a that rotatably supports the rotating shaft 39 is provided.

  The attachment member 35 rotates about the rotation shaft 39 as shown in FIG. 13 from the mounting position as shown in FIG. The rotated attachment member 35 is accommodated in the attachment accommodating portion 26 to be in the accommodating position, as shown in FIG.

  Although not shown in the drawings, also in the third embodiment, the dust box 45 can be mounted in a state where the attachment member 35 is disposed at the accommodation position, as in the first embodiment.

(Summary)
As described above, in the present embodiment, the direction in which the chips are discharged can be switched depending on whether or not the attachment member 35 is arranged on the extension of the chip discharge port 20b which is the exit of the chip discharge path 20a. That is, when the attachment member 35 is not arranged on an extension of the chip discharge port 20b, the chip is directly discharged from the chip discharge port 20b, and thus the direction in which the chip is discharged is not changed by the attachment member 35. . Therefore, the momentum of the discharge is not reduced by the attachment member 35, and the accumulation of the chips is hardly generated. On the other hand, when the attachment member 35 is disposed on an extension of the chip discharge port 20b, the direction of chip discharge can be changed by the attachment member 35. Therefore, it is possible to guide the chips so that the chips do not accumulate in the direction of the worker and the material to be cut. According to such a configuration, the direction in which the chips are discharged can be switched depending on the environment in which the portable cutting machine 10 is used. For example, when the portable cutting machine 10 is used in a direction in which chips are easily clogged, chip clogging is prevented by not disposing the attachment member 35 on an extension of the chip discharge port 20b. be able to. Further, when it is desired to prevent chips from falling on the portable cutting machine 10 or the material to be cut as much as possible, the attachment member 35 is arranged on an extension of the chip discharge port 20b to prevent chips from falling. be able to.

  Further, the attachment member 35 can be fixed to at least a mounting position on the extension of the chip discharge port 20b and a storage position not on the extension of the chip discharge port 20b. According to such a configuration, even when the attachment member 35 is not used, the attachment member 35 can be arranged at the accommodation position. Therefore, the attachment member 35 that is not used can be attached to the portable cutting machine 10, so that the attachment member 35 can be prevented from being lost. In addition, when the attachment member 35 is used, the attachment member 35 at the accommodation position can be moved and used, so that workability is good.

  In addition, the attachment member 35 can move between the mounting position and the accommodation position without being separated from the portable cutting machine 10. According to such a configuration, since the attachment member 35 is not separated from the portable cutting machine 10 when the attachment member 35 is moved, the attachment member 35 can be prevented from dropping or losing.

  Further, a dust box 45 for collecting chips is provided, and the dust box 45 can be mounted on an extension of the chip discharge port 20b instead of the attachment member 35. That is, when used without the dust box 45 attached, it can be used as a normal circular saw without a dust collecting function, and when used with the dust box 45 attached, it can be used as a dust collecting circular saw. According to such a configuration, it is possible to provide a single product with the functions of both a normal circular saw and a dust collecting circular saw, which were conventionally separate products. At this time, since the dust box 45 is arranged on an extension of the chip discharge port 20b with the attachment member 35 removed, the position of the chip introduction port 45a connected to the chip discharge port 20b is changed to the position of the attachment member 35. It can be arranged in the cutting direction forward by a distance. Therefore, the capacity of the dust box 45 can be increased as much as possible while the overall length of the machine is reduced as much as possible.

  In the above-described embodiment, the attachment member 35 can move between the mounting position and the accommodation position without being separated from the portable cutting machine 10. However, the present invention is not limited to this. You may make it detachable from the cutting machine 10. Further, the detached attachment member 35 may be attached to the accommodation position.

  Note that the attachment member 35 is configured to be rotatable in a state where the attachment member 35 is disposed near the chip discharge port 20b, and the direction in which the chip is discharged is set to the extending direction of the chip discharge port 20b or the chip discharge port. The mechanism may be switchable in a direction different from the extension direction of the 20b.

DESCRIPTION OF SYMBOLS 10 Portable cutting machine 11 Base 11a Opening 15 Cutting machine main body 17 Saw blade 17a Rotating shaft 18 Trigger 19 Battery 20 Housing 20a Chip discharge path 20b Chip discharge port 21 Main cover 22 Grip part 23 Gear cover part 23a Slide groove 24 Attachment accommodation section (first embodiment)
25 Attachment accommodation section (Second embodiment)
26 Attachment accommodation part (third embodiment)
26a Shaft support part 28 Battery mounting part 30 Motor housing 31 Saw cover 31a Sliding groove 35 Attachment member 36 Chip guide part 36a Upper wall 36b Lower wall 36c Inclined surface 37 Knob 38 Slide protrusion 39 Rotating shaft 45 Dust box 45a Chip introduction Mouth 45b Chip storage unit 45c Guide plate

  The present invention relates to a portable cutting machine characterized by processing of chips generated during cutting.

  As this kind of portable cutting machine, there are known a normal circular saw for discharging chips generated at the time of cutting backward, and a dust collecting circular saw for collecting chips generated at the time of cutting with a dust box or the like. In a circular saw that discharges cuttings backward, a mainstream that guides and discharges cuttings obliquely rearward so that chips do not accumulate in the direction of an operator or a material to be cut is mainly used. However, in such a configuration, it is necessary to forcibly change the discharge direction of the chips by providing a bent discharge path for the chips, so that the force for discharging the chips decreases, Static electricity is generated due to friction between the discharge path and the discharge path, and there is a problem that chips are clogged in the discharge path.

  Regarding such a problem, Patent Literature 1 discloses a portable circular saw having a chip discharge path changing unit that switches between discharging the chip into the saw cover and discharging to the chip discharge channel. I have. In the invention described in Patent Document 1, the provision of the chip discharge path changing means makes it possible to arbitrarily select a chip discharge path according to the cutting work situation and the like, and the flow of the chip into the chip discharge path. When cutting is suppressed, chips pass through the inside of the saw cover as a discharge flow path and are discharged from the rear in the cutting direction, and chips may be clogged in the chip discharge path in the dust cover depending on the cutting work situation. It is said that the workability can be prevented from being reduced.

Japanese Patent No. 4715640

  However, in the invention described in Patent Document 1 described above, the chip discharge path has a shape that surrounds the top, bottom, left, and right, so that the chip discharge path has a shape that is easily clogged with chips. In addition, there is a problem that the shape is difficult to eliminate the clogging of the chips, and the maintainability is poor. In addition, when chips are guided into the saw cover, the chips may fall near the rotation axis of the saw blade, which may cause poor sliding of the lower guard or the like covering the saw blade.

  Therefore, an object of the present invention is to provide a portable cutting machine which prevents clogging of chips in a discharge path and has excellent maintainability.

  The present invention has been made to solve the above-described problems, and has the following features.

The invention according to claim 1 includes a motor, a saw blade that is rotated by the motor and cuts a workpiece, and a housing having a saw cover that covers an upper portion of the saw blade. A chip discharge path for guiding chips generated when the saw blade cuts the material to be cut is formed, and an attachment member that can be arranged near a chip discharge port that is an outlet of the chip discharge path is provided. By mounting the attachment member on the upper surface of the saw cover, the direction in which chips are discharged can be switched.

  According to a second aspect of the present invention, in addition to the features of the first aspect of the present invention, when the attachment member is arranged near the chip discharge port, the cutting part discharged from the chip discharge port is provided. The discharge direction of the powder is formed so as to be changed by the attachment member, and when the attachment member is not disposed near the chip discharge port, the discharge direction of the chip discharged from the chip discharge port is changed to the attachment member. Is formed so as not to change.

Invention according to claim 3, in addition to feature points of the invention described in claim 1 or 2 above, wherein the attachment member includes at least a mounting position in the vicinity of the chip discharge port, and the mounting position It can be fixed to different accommodation positions.

  According to a fourth aspect of the present invention, in addition to the features of the third aspect of the present invention, the attachment member allows the mounting position and the storage position to be mutually separated without being separated from the portable cutting machine. It is characterized by being movable.

  The invention according to claim 5 includes, in addition to the features of the invention according to any one of claims 1 to 4 described above, a dust box for collecting chips, wherein the dust box is provided in place of the attachment member. It can be mounted near the swarf discharge port.

  The invention according to claim 1 is as described above, and includes an attachment member that can be arranged near a chip discharge port that is an exit of a chip discharge path, and the discharge direction of the chip can be switched by the attachment member. . According to such a configuration, the direction in which chips are discharged can be switched depending on the environment in which the portable cutting machine is used. For example, when a portable cutting machine is used in a direction in which chips are likely to be clogged, clogging of chips can be prevented by changing the direction in which chips are discharged by the attachment member as little as possible. Further, when it is desired to prevent chips from falling on the portable cutting machine or the material to be cut as much as possible, it is possible to prevent chips from falling by changing the direction in which chips are discharged by the attachment member.

  Further, the invention according to claim 2 is as described above, and when the attachment member is arranged near the chip discharge port, the discharge direction of the chip discharged from the chip discharge port is changed by the attachment member. When the attachment member is not arranged near the chip discharge port, the discharge direction of the chip discharged from the chip discharge port is formed so as not to be changed by the attachment member. According to such a configuration, when the attachment member is arranged near the chip discharge port, the discharge direction of the chip can be changed by the attachment member. Therefore, it is possible to guide the chips so that the chips do not accumulate in the direction of the worker and the material to be cut. On the other hand, when the attachment member is not disposed in the vicinity of the chip discharge port, the chip is directly discharged from the chip discharge port, so that the direction in which the chip is discharged is not changed by the attachment member. Therefore, the momentum of the discharge is not reduced by the attachment member, and the accumulation of the chips can be suppressed.

  The invention according to claim 3 is as described above, and the attachment member can be fixed to at least a mounting position near the chip discharge port and a housing position different from the mounting position. According to such a configuration, the attachment member can be arranged at the accommodation position even when the attachment member is not used. Therefore, the attachment member that is not used can be attached to the portable cutting machine, so that the attachment member can be prevented from being lost. In addition, when the attachment member is used, the attachment member at the accommodation position can be moved and used, so that workability is good.

  Further, the invention according to claim 4 is as described above, and the attachment member can move between the mounting position and the accommodation position without being separated from the portable cutting machine. According to such a configuration, the attachment member is not separated from the portable cutting machine when the attachment member is moved, so that the attachment member can be prevented from being dropped or lost.

  The invention according to claim 5 is as described above, and includes a dust box for collecting chips, and the dust box can be mounted near the chip discharge port instead of the attachment member. That is, when used without the dust box attached, it can be used as a normal circular saw without a dust collecting function, and when used with the dust box attached, it can be used as a dust collecting circular saw. According to such a configuration, it is possible to provide a single product with the functions of both a normal circular saw and a dust collecting circular saw, which were conventionally separate products. At this time, since the dust box is arranged near the chip discharge port with the attachment member removed, the position of the chip introduction port connected to the chip discharge port is arranged forward of the cutting direction by the amount of the attachment member. can do. Therefore, the capacity of the dust box can be increased as much as possible while the overall length of the machine is reduced as much as possible.

It is a figure concerning a 1st embodiment, and is an outline view of a portable cutting machine in the state where an attachment member was arranged in a mounting position. It is a figure concerning a 1st embodiment, and is a top view of a portable cutting machine in the state where an attachment member was arranged in a mounting position. It is a figure concerning a 1st embodiment, and is a sectional view of a portable cutting machine in the state where an attachment member was arranged in a mounting position. It is a figure concerning a 1st embodiment, and is an outline view of a portable cutting machine which is moving an attachment member. It is a figure concerning a 1st embodiment, and is an outline view of a portable cutting machine in the state where an attachment member was arranged in an accommodation position. It is a figure concerning a 1st embodiment, and is an external view of a portable cutting machine in the state where a dust box was attached. It is a figure concerning a 1st embodiment, and is a top view of a portable cutting machine in the state where a dust box was attached. It is a figure concerning a 1st embodiment, and is a sectional view of a portable cutting machine in the state where a dust box was attached. It is a figure concerning a 2nd embodiment, and is an outline view of a portable cutting machine in the state where an attachment member was arranged in an accommodation position. It is a figure concerning a 2nd embodiment, and is an external view which looked at a portable cutting machine which is moving an attachment member from the front. It is a figure concerning a 2nd embodiment, and is an appearance view which looked at a portable cutting machine in the state where an attachment member was arranged at an accommodation position from the front. It is a figure concerning 3rd Embodiment, and is an external view of the portable cutting machine in the state where the attachment member was arrange | positioned at the mounting position. It is a figure concerning 3rd Embodiment, and is an external view of the portable cutting machine which is moving the attachment member. It is a figure concerning a 3rd embodiment, and is an outline view of a portable cutting machine in the state where an attachment member was arranged in an accommodation position. It is a figure concerning a 3rd embodiment, and is a sectional view of a portable cutting machine in the state where an attachment member was arranged in an accommodation position.

(First embodiment)
A first embodiment of the present invention will be described with reference to FIGS.

  As shown in FIGS. 1 to 3, the portable cutting machine 10 according to the present embodiment includes a cutting machine main body 15 that rotatably supports a saw blade 17 and a base 11 attached to a lower portion of the cutting machine main body 15. , Is provided.

  The base 11 is a metal plate-shaped member that comes into contact with the material to be cut, and cuts the material to be cut below the base 11 by exposing a part of the saw blade 17 from the opening 11 a formed through. It is formed so that it can be done.

  The cutting machine body 15 is entirely covered by a housing 20. The housing 20 according to the present embodiment is formed by combining a plurality of members, and includes a main cover 21, a motor housing 30, and a saw cover 31.

  The main cover 21 is a cover that incorporates a gear mechanism, a control board, and the like. A motor housing 30 is fixed to the left side of the main cover 21 when viewed in the cutting direction of the saw blade 17, and a saw cover 31 is fixed to the right side. The main cover 21 includes a grip part 22, a gear cover part 23, and a battery mounting part 28.

  The grip portion 22 is provided above the gear cover portion 23 so as to be gripped by an operator, and is formed in a rod shape substantially parallel to the cutting direction of the saw blade 17. A trigger 18 for performing a cutting operation is operably provided inside the grip portion 22. The trigger 18 is arranged at a position where the index finger touches when the operator grips the grip portion 22, and when the operator pulls the trigger 18, a motor (to be described later) rotates and the saw blade 17 is rotated. Is designed to rotate.

  The gear cover portion 23 is a portion for housing a gear operated by a motor, and is provided closer to the saw cover 31 than the grip portion 22 in plan view, as shown in FIG. In the present embodiment, an attachment member 35 described below can be arranged on the upper surface of the gear cover 23. The gear cover portion 23 is provided with a slide groove 23a for guiding the slide of the attachment member 35 and an attachment accommodating portion 24 for accommodating the attachment member 35. The attachment accommodating portion 24 according to the present embodiment is provided between the grip portion 22 and the saw cover 31 in a plan view, and is recessed on the surface of the housing 20.

  The battery mounting section 28 is provided behind the grip section 22. The battery 19 is detachable from the lower surface of the battery mounting section 28. The battery 19 has a built-in secondary battery and is used as a drive source for a motor and a control device.

  The motor housing 30 is a part that houses a motor (not shown). As shown in FIG. 2 and the like, the motor housing 30 is provided so as to protrude to the opposite side of the saw blade 17 with the grip portion 22 interposed therebetween. When the motor built in the motor housing 30 rotates, the rotational force of the motor is transmitted to the rotating shaft 17a of the saw blade 17 via a gear. In this way, the saw blade 17 is rotated by the motor, and the material to be cut can be cut.

  The saw cover 31 covers the upper part of the saw blade 17 together with the main cover 21. In the present embodiment, an attachment member 35 described later can be arranged also on the upper part of the saw cover 31. The saw cover 31 is provided with a slide groove 31 a for guiding the slide of the attachment member 35. The sliding groove 31a is formed so as to be continuous with the sliding groove 23a of the gear cover 23, so that the attachment member 35 can slide on the saw cover 31 and the gear cover 23.

  Note that inside the housing 20, there is formed a chip discharge path 20a for guiding chips generated when the saw blade 17 cuts the workpiece. Specifically, as shown in FIG. 3, a gap is provided between the housing 20 (saw cover 31 and main cover 21) and the saw blade 17 so that chips can pass therethrough. A path 20a is formed. The chip discharge path 20 a is provided on the front side in the cutting direction of the saw blade 17 and is formed along the outer periphery of the saw blade 17. Therefore, when the saw blade 17 rotates and cuts the material to be cut, the generated chips are wound up by the saw blade 17 and are vigorously guided to the chip discharge path 20a. . In addition, this chip discharge path 20a does not have a wall on the side of the saw blade 17 (there is no wall between the outer peripheral wall of the chip discharge path 20a and the saw blade 17). The saw blade 17 side is open. For this reason, the structure is such that chip clogging is unlikely to occur.

  The chip discharge port 20b, which is the outlet of the chip discharge path 20a, is open above the saw blade 17. In addition, the chip discharge port 20 b is open ahead of the rotation shaft 17 a of the saw blade 17. By opening the chip discharge port 20b as far forward as possible, when a dust box 45 described later is attached, chips can be guided to the dust box 45 by making full use of the discharge force of the chip, thereby improving the dust collection effect. be able to. In addition, since the dust box 45 can be disposed closer to the front, the capacity of the dust box 45 can be increased while reducing the overall length of the machine without projecting the dust box 45 backward.

  In the present embodiment, the attachment member 35 can be arranged on an extension of the chip discharge port 20b. The direction in which the chips are discharged can be switched depending on whether or not the attachment member 35 is arranged on an extension of the chip discharge port 20b.

  In the present embodiment, the attachment member 35 can be disposed on an extension of the chip discharge port 20b. However, the attachment member 35 is disposed at least in the vicinity of the chip discharge port 20b that can change the discharge direction of the chip. If possible. That is, the chip guide portion 36 of the attachment member 35 faces the chip discharge port 20b, and the attachment member 35 is located at a position where the chips discharged from the chip discharge port 20b are continuously guided to the chip guide portion 36. It is only necessary to be able to arrange.

The attachment member 35 is a member movably attached to the surface of the housing 20, and includes a chip guide portion 36 that can be disposed so as to be continuous with the chip discharge port 20b, as shown in FIGS. ing. The chip guide portion 36 includes an upper wall 36a, a lower wall 36b, and an inclined surface 36c, and is surrounded in three directions. In other words, the anti-grip portion 22 side (the right side when the grip portion 22 is gripped) has an open shape, and is formed so as to discharge chips from the open surface to the outside. The inclined surface 36c is provided to be inclined with respect to the cutting direction (front-back direction) of the saw blade 17, and is disposed so as to face obliquely to the chip discharge port 20b. The inclined surface 36c is inclined toward the anti-grip portion 22 side (right side when the grip portion 22 is gripped) toward the rear, so that the chips discharged from the chip discharge port 20b can be inclined on the inclined surface 36c. Along the right rear. Since the chips are guided to the rear right as described above, the structure is such that the chips do not easily fall on the body of the right-handed worker. Note that the tip of the chip guide portion 36 (the tip of the inclined surface 36c) is disposed behind the rotation shaft 17a of the saw blade 17. By arranging the inclined surface 36c as rearward as possible, the chips are guided as rearwardly as possible, and the chips and the workpiece are prevented from falling down.

  The attachment member 35 according to the present embodiment is slidable on the surface of the housing 20, as shown in FIGS. A pair of sliding protrusions 38 protruding in the front-rear direction are formed at a lower portion of the attachment member 35, and the sliding protrusions 38 slide on sliding grooves 23 a of the gear cover 23 and the sliding grooves 31 a of the saw cover 31. By movably engaging, the slide of the attachment member 35 is guided. As shown in FIG. 4, the attachment member 35 is slidable in parallel with the rotation axis 17a of the saw blade 17. When the attachment member 35 is slid in the direction of the grip portion 22 and then moved downward, as shown in FIG. 5, the attachment member 35 is fitted into and fixed to the attachment accommodating portion 24 of the gear cover portion 23. It has become. A knob 37 is formed on the upper surface of the attachment member 35 so as to protrude. The knob 37 is for facilitating the lifting of the attachment member 35 accommodated in the attachment accommodating portion 24, and is formed so that the operator can operate the knob 37 by hand.

  In this manner, the attachment member 35 is fixed to the mounting position on the extension of the chip discharge port 20b as shown in FIG. 1 and the storage position not on the extension of the chip discharge port 20b as shown in FIG. It is possible. Therefore, the attachment member 35 is arranged at the mounting position when in use, and is arranged at the accommodation position when not in use. In addition, since the attachment member 35 is slidably attached, the attachment position and the accommodation position can be mutually moved without being separated from the portable cutting machine 10. With such a configuration, the attachment member 35 is prevented from falling or being lost.

  By the way, the portable cutting machine 10 according to the present embodiment can be used with the dust box 45 attached. That is, in a state where the attachment member 35 is fixed at the accommodation position, as shown in FIGS. 6 to 8, the dust box 45 can be mounted on the extension of the chip discharge port 20 b instead of the attachment member 35. The dust box 45 is a member attached to the outside of the housing 20 for collecting chips. As shown in FIG. 8, the dust box 45 includes a chip introduction port 45a arranged to be continuous with the chip discharge port 20b, a chip storage portion 45b for accommodating chips, and a chip storage section 45b. And a guide plate 45c for guiding chips coming from the powder inlet 45a to the inside of the chip storage portion 45b. When the portable cutting machine 10 is used with the dust box 45 attached, the chips passing through the chip discharge path 20a enter the inside of the dust box 45 from the chip introduction port 45a, and are stored in the chip storage portion 45b. It has become. Note that if the inside of the dust box 45 is sealed, the air pressure in the dust box 45 may increase and a sufficient dust collecting effect may not be obtained. Therefore, an air hole communicating with the outside may be provided in the chip storage portion 45b. The air hole can be provided, for example, on the back side of the guide plate 45c. If an air hole is provided on the back side of the guide plate 45c, air can escape while preventing chips in the chip storage portion 45b from spilling outside.

  The accommodation position of the attachment member 35 is a position that does not hinder the attachment of the dust box 45. That is, since the attachment accommodating portion 24 is provided closer to the grip portion 22 than the chip discharge port 20b, the accommodating position of the attachment member 35 is closer to the grip portion 22 than the dust box 45, and the chip discharge port 20b is provided. The attachment member 35 is formed so as not to interfere with the dust box 45 even when the dust box 45 is attached on an extension of the above.

(Second embodiment)
A second embodiment of the present invention will be described with reference to FIGS. Note that the basic configuration of the present embodiment is not different from that of the first embodiment, and thus only different portions will be described, avoiding redundant description.

  The attachment member 35 according to the present embodiment is formed movably with respect to the housing 20 with a structure different from that of the first embodiment. That is, as shown in FIG. 9, the attachment member 35 according to the present embodiment slides in the direction of the grip portion 22 in parallel with the rotation axis 17 a of the saw blade 17 from the mounting position, and then moves forward in the cutting direction. And slidable. That is, as shown in FIG. 10, the attachment accommodating portion 25 is provided ahead of the attachment member 35 at the mounting position in the cutting direction. The attachment accommodating portion 25 is formed on the surface of the housing 20 so that the attachment member 35 can be locked. As shown in FIG. 11, the attachment member 35 can be brought into the housed state by locking the attachment member 35 to the attachment housing portion 25.

  Although not shown in the drawings, the dust box 45 can be mounted in the second embodiment, similarly to the first embodiment, with the attachment member 35 disposed at the accommodation position.

(Third embodiment)
A third embodiment of the present invention will be described with reference to FIGS. Note that the basic configuration of the present embodiment is not different from that of the first embodiment, and thus only different portions will be described, avoiding redundant description.

  The attachment member 35 according to the present embodiment is formed movably with respect to the housing 20 with a structure different from that of the first embodiment. That is, the attachment member 35 according to the present embodiment can be moved relative to the mounting position and the accommodation position by rotating with respect to the housing 20.

  In the present embodiment, as shown in FIG. 15, the attachment member 35 is provided with a rotating shaft 39 that projects in the front-rear direction. In the vicinity of the attachment accommodating portion 26 of the gear cover portion 23, a shaft supporting portion 26a that rotatably supports the rotating shaft 39 is provided.

  The attachment member 35 rotates about the rotation shaft 39 as shown in FIG. 13 from the mounting position as shown in FIG. The rotated attachment member 35 is accommodated in the attachment accommodating portion 26 to be in the accommodating position, as shown in FIG.

  Although not shown in the drawings, also in the third embodiment, the dust box 45 can be mounted in a state where the attachment member 35 is disposed at the accommodation position, as in the first embodiment.

(Summary)
As described above, in the present embodiment, the direction in which the chips are discharged can be switched depending on whether or not the attachment member 35 is arranged on the extension of the chip discharge port 20b which is the exit of the chip discharge path 20a. That is, when the attachment member 35 is not arranged on an extension of the chip discharge port 20b, the chip is directly discharged from the chip discharge port 20b, and thus the direction in which the chip is discharged is not changed by the attachment member 35. . Therefore, the momentum of the discharge is not reduced by the attachment member 35, and the accumulation of the chips is hardly generated. On the other hand, when the attachment member 35 is disposed on an extension of the chip discharge port 20b, the direction of chip discharge can be changed by the attachment member 35. Therefore, it is possible to guide the chips so that the chips do not accumulate in the direction of the worker and the material to be cut. According to such a configuration, the direction in which the chips are discharged can be switched depending on the environment in which the portable cutting machine 10 is used. For example, when the portable cutting machine 10 is used in a direction in which chips are easily clogged, chip clogging is prevented by not disposing the attachment member 35 on an extension of the chip discharge port 20b. be able to. Further, when it is desired to prevent chips from falling on the portable cutting machine 10 or the material to be cut as much as possible, the attachment member 35 is arranged on an extension of the chip discharge port 20b to prevent chips from falling. be able to.

  Further, the attachment member 35 can be fixed to at least a mounting position on the extension of the chip discharge port 20b and a storage position not on the extension of the chip discharge port 20b. According to such a configuration, even when the attachment member 35 is not used, the attachment member 35 can be arranged at the accommodation position. Therefore, the attachment member 35 that is not used can be attached to the portable cutting machine 10, so that the attachment member 35 can be prevented from being lost. In addition, when the attachment member 35 is used, the attachment member 35 at the accommodation position can be moved and used, so that workability is good.

  In addition, the attachment member 35 can move between the mounting position and the accommodation position without being separated from the portable cutting machine 10. According to such a configuration, since the attachment member 35 is not separated from the portable cutting machine 10 when the attachment member 35 is moved, the attachment member 35 can be prevented from dropping or losing.

  Further, a dust box 45 for collecting chips is provided, and the dust box 45 can be mounted on an extension of the chip discharge port 20b instead of the attachment member 35. That is, when used without the dust box 45 attached, it can be used as a normal circular saw without a dust collecting function, and when used with the dust box 45 attached, it can be used as a dust collecting circular saw. According to such a configuration, it is possible to provide a single product with the functions of both a normal circular saw and a dust collecting circular saw, which were conventionally separate products. At this time, since the dust box 45 is arranged on an extension of the chip discharge port 20b with the attachment member 35 removed, the position of the chip introduction port 45a connected to the chip discharge port 20b is changed to the position of the attachment member 35. It can be arranged in the cutting direction forward by a distance. Therefore, the capacity of the dust box 45 can be increased as much as possible while the overall length of the machine is reduced as much as possible.

  In the above-described embodiment, the attachment member 35 can move between the mounting position and the accommodation position without being separated from the portable cutting machine 10. However, the present invention is not limited to this. You may make it detachable from the cutting machine 10. Further, the detached attachment member 35 may be attached to the accommodation position.

  Note that the attachment member 35 is configured to be rotatable in a state where the attachment member 35 is disposed near the chip discharge port 20b, and the direction in which the chip is discharged is set to the extending direction of the chip discharge port 20b or the chip discharge port. The mechanism may be switchable in a direction different from the extension direction of the 20b.

DESCRIPTION OF SYMBOLS 10 Portable cutting machine 11 Base 11a Opening 15 Cutting machine main body 17 Saw blade 17a Rotating shaft 18 Trigger 19 Battery 20 Housing 20a Chip discharge path 20b Chip discharge port 21 Main cover 22 Grip part 23 Gear cover part 23a Slide groove 24 Attachment accommodation section (first embodiment)
25 Attachment accommodation section (Second embodiment)
26 Attachment accommodation part (third embodiment)
26a Shaft support part 28 Battery mounting part 30 Motor housing 31 Saw cover 31a Sliding groove 35 Attachment member 36 Chip guide part 36a Upper wall 36b Lower wall 36c Inclined surface 37 Knob 38 Slide protrusion 39 Rotating shaft 45 Dust box 45a Chip introduction Mouth 45b Chip storage unit 45c Guide plate

Claims (5)

Motor and
A saw blade that is rotated by the motor to cut the material to be cut,
A housing that covers the saw blade and the motor;
With
The housing forms a chip discharge path that guides chips generated when the saw blade cuts the material to be cut,
A portable cutting machine, comprising: an attachment member that can be disposed in the vicinity of a chip discharge port, which is an outlet of the chip discharge path, wherein the direction of chip discharge can be switched by the attachment member. When the attachment member is disposed in the vicinity of the chip discharge port, the discharge direction of the chip discharged from the chip discharge port is formed so as to be changed by the attachment member,
When the attachment member is not arranged near the chip discharge port, the discharge direction of the chip discharged from the chip discharge port is formed so as not to be changed by the attachment member. Item 6. A portable cutting machine according to Item 1.   The portable device according to claim 1, wherein the attachment member is fixable at least to a mounting position near the chip discharge port and a storage position different from the mounting position. 4. Cutting machine.   The portable cutting machine according to claim 3, wherein the attachment member can move between the mounting position and the accommodation position without being separated from the portable cutting machine.   The dust box for collecting chips is provided, and the dust box can be mounted near the chip discharge port instead of the attachment member, The dust box is provided in any one of Claims 1-4 characterized by the above-mentioned. Portable cutting machine.

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