JP7423424B2 - portable cutting machine - Google Patents

Description

The present invention relates to a portable cutting machine, for example a portable cutting machine called a rear handle saw.

This type of portable cutting machine includes a flat base whose lower surface is in contact with a material to be cut, and a cutting machine main body supported by the upper surface of the base. The cutting machine body has an electric motor. A cutting tool is attached to the tip of the output shaft of the electric motor with a fixing bolt. When replacing the cutting tool, it is necessary to quickly loosen the fixing bolt from the output shaft, or conversely tighten it with the appropriate torque. The fixing bolt is, for example, a hexagonal bolt or a hexagonal socket bolt. When loosening or tightening a hexagonal bolt, a tool such as a hexagonal wrench is used.

Patent Document 1 discloses a structure for holding a tool for exchanging cutting tools. Patent Document 1 discloses, as a tool, a box wrench that has a flat plate shape and has hexagonal holes on both sides. Patent Document 1 discloses a configuration in which a box wrench is held on a base.

US Patent No. 9333638

However, in the tightening tool holding technique disclosed in Patent Document 1, a special box wrench is used, and general commercially available products cannot be used. Additionally, the wrench protrudes largely from the end of the base to facilitate attachment and detachment. For this reason, for example, when the cutting depth of the cutter is made shallow, the wrench tends to get in the way of the work. Furthermore, when this technology is applied to box wrenches and box wrenches for hexagonal bolts, which are usually larger than hexagonal screw keys, a larger space is required. Therefore, there is a need for a structure that can compactly hold a relatively large hex bolt tightening tool so that it does not get in the way of work. Furthermore, since there is no box wrench available that can be held in the cutting machine body or in the base, there has been a demand for a technique for holding this type of tightening tool.

According to one feature of the present disclosure, a portable cutting machine includes a cutting machine body that includes an electric motor that rotates a disc-shaped cutting tool, and a tightening tool that engages the outer periphery of the hexagonal bolt when tightening the hexagonal bolt. have The cutting machine main body has a tool accommodating portion that removably accommodates the tightening tool and allows a portion of the tightening tool to protrude. The tool accommodating portion has a cylindrical shape extending in the direction in which the tightening tool is removed. The entrance of the tool accommodating portion has a side opening portion cut out so that the tightening tool is exposed in a direction perpendicular to the removal direction. Therefore, the tightening tool is accommodated in the tool accommodating portion formed in the cutting machine body. Therefore, for example, when the cutting machine body is displaced upward in order to reduce the cutting depth of the cutting tool, the tightening tool is displaced together with the cutting machine body. For this reason, the present structure is less likely to interfere with work as would be the case with the conventional structure in which the structure is held so as to protrude laterally from the base. Further, a side opening portion is provided at the entrance of the tool accommodating portion. The side opening part is a part of the entire circumference of the cylindrical entrance, and is a part of the upper, lower, left, and right sides of the tightening tool in the extending direction of the tool storage part (the direction in which the tightening tool enters). It is cut out and installed. Therefore, the entrance of the tool accommodating portion has an uneven shape in the front-rear direction, which is the direction in which the tightening tool enters and takes out. A concave portion around the entrance port that is recessed in the entrance direction corresponds to the side opening portion. The side opening portion exposes the tightening tool to the side, making it easier to touch the tightening tool with your fingertips during removal. This facilitates the removal of the tightening tool.

According to other features of the disclosure, a resilient member is provided in the tool housing. The elastic member elastically presses the tightening tool in a direction perpendicular to the removal direction. Therefore, the elastic member can hold the tightening tool even if the tightening tool has various shapes or sizes. This provides a suitable resistance in the removal direction and ensures that the tightening tool is held in the stored position.

According to other features of the disclosure, the cutting machine includes a handle extending from the cutting machine body. A part of the tightening tool inserted into the tool accommodating part protrudes rearward from the tool accommodating part along the bottom surface of the handle, and the tool accommodating part is inserted into the cutting machine so that the entire tightening tool is stored in front of the rear end of the handle. formed in the main body. Therefore, the protrusion of the accommodated tightening tool is hidden below the handle. Moreover, the protrusion is guarded by the handle. Furthermore, the protruding portion is less likely to get in the way when working on the cutting machine body.

According to another feature of the present disclosure, a portable cutting machine includes a base that contacts a material to be cut, and a cutting machine body that is supported by the base. The cutting machine main body includes an electric motor that rotates a disc-shaped cutting tool. A box wrench for tightening a hexagonal bolt is removably elastically held by an elastic member on a base or a cutting machine body. Therefore, the box wrench, which is relatively large and heavy, is held in the tool housing in a compact configuration.

According to another feature of the present disclosure, an elastic member is provided on the base to hold the box wrench on the top surface of the base. Therefore, the box wrench is compactly housed on the upper surface of the base and is less likely to get in the way.

According to another feature of the present disclosure, the box wrench includes a holder portion in which an engagement hole for engaging a hexagonal bolt is formed, and a handle portion extending laterally from the holder portion. The holder portion is held by an elastic member, and the box wrench is housed in the tool housing portion. Therefore, the box wrench is held in the vicinity of the center of gravity by the elastic members, so that the box wrench is stably accommodated in the tool accommodating portion.

According to another feature of the present disclosure, the box wrench includes a holder portion in which an engagement hole for engaging a hexagonal bolt is formed, and a handle portion extending laterally from the holder portion. A housing portion is formed in the base to accommodate the handle portion when the holder portion is moved along the base. Therefore, the ease of attaching and detaching the box wrench to and from the elastic member is improved, and the box wrench is housed on the base in a stable horizontal position along the base.

According to another feature of the present disclosure, a tool accommodating portion for accommodating a box wrench is formed in the cutting machine body. Therefore, for example, when the cutting machine main body is displaced upward in order to reduce the cutting depth of the cutting tool, the box wrench is displaced together with the cutting machine main body. As a result, with this structure, the tool is less likely to get in the way of work, unlike in the case of the conventional structure in which the tool is held so as to protrude laterally from the base.

According to another feature of the present disclosure, the box wrench includes a holder portion in which an engagement hole for engaging a hexagonal bolt is formed, and a handle portion extending laterally from the holder portion. The tool housing part stores a part of the holder part and holds the box wrench without housing the handle part. Therefore, the handle portion becomes easier to grip, and the box wrench can be easily attached to and removed from the tool storage portion.

According to another feature of the present disclosure, the cutting machine body is provided with an elastic member that removably clamps the base of the handle portion of the box wrench. Therefore, the tip of the handle portion can be easily grasped, and the box wrench can be easily removed from the cutting machine main body. Moreover, the box wrench is compactly accommodated in the cutting machine main body.

According to other features of the disclosure, a handle is provided extending from the cutting machine body. A tool housing is disposed within the cutting machine body between the electric motor and the handle. Therefore, by effectively utilizing the dead space of the cutting machine main body, the box wrench can be housed compactly in the cutting machine main body so as not to get in the way.

According to another feature of the present disclosure, the portable cutting machine has a handle that is disposed from the cutting machine body behind the rear end of the base. Therefore, the box wrench and box wrench can be stored compactly so that they do not get in the way of the rear handle saw. This facilitates the cutting tool replacement work.

FIG. 1 is an overall perspective view of a portable cutting machine according to a first embodiment. FIG. 2 is a right side view of the portable cutting machine seen from the direction of arrow II in FIG. 1; FIG. 3 is a side view showing a portion of the portable cutting machine shown in FIG. 2 in cross section. FIG. 2 is a left side view of the portable cutting machine viewed from the direction of arrow IV in FIG. 1; 3 is a top view of the portable cutting machine seen from the direction of arrow V in FIG. 2. FIG. 3 is a front view of the portable cutting machine seen from the direction of arrow VI in FIG. 2. FIG. FIG. 3 is a rear view of the portable cutting machine seen from the direction of arrow VII in FIG. 2; FIG. 3 is a bottom view of the portable cutting machine viewed from the direction of arrow VIII in FIG. 2; FIG. 3 is an enlarged vertical cross-sectional view of the tool accommodating portion according to the first embodiment. It is a bottom view of the tool accommodating part concerning a 1st embodiment. FIG. 3 is a right side view of the hook in a stored state. FIG. 3 is a perspective view of the hook in a stored state. This figure shows the state seen from the left side. FIG. 3 is a left side view of the hook in a stored state. FIG. 14 is a front view of the hook in a stored state when viewed from the direction of arrow XIV in FIG. 13; FIG. 14 is a rear view of the hook in a stored state when viewed from the direction of arrow XV in FIG. 13; 14 is a cross-sectional view of the hook taken along the line XVI-XVI in FIG. 13; FIG. FIG. 3 is a left side view of the front part of the base of the portable cutting machine according to the first embodiment. In this figure, the angular plate and the fixed lever are shown in a longitudinal section (cross-sectional view taken along the line XVII-XVII in FIG. 6). It is a perspective view of the cap for dust collection ducts. It is a side view of the cap for dust collection ducts. 20 is a bottom view of the dust collection duct cap viewed from the arrow XX direction in FIG. 19. FIG. FIG. 2 is an overall perspective view of the lever type wrench. It is a perspective view of the tool storage part concerning a 2nd embodiment. It is a longitudinal cross-sectional view of the tool accommodating part concerning a 2nd embodiment. FIG. 24 is a cross-sectional view taken along the line XXIV-XXIV in FIG. 23 of the tool accommodating portion according to the second embodiment. It is a perspective view of the tool accommodating part concerning a 3rd embodiment. It is an exploded perspective view of a tool accommodating part concerning a 3rd embodiment. It is a longitudinal cross-sectional view of the tool accommodating part concerning a 3rd embodiment. It is a perspective view of the accommodation wall part of the tool accommodation part based on 3rd Embodiment. This figure shows the state viewed diagonally from the lower left. FIG. 7 is a right side view of a portable cutting machine according to a fourth embodiment. It is a top view of the portable cutting machine based on 4th Embodiment. FIG. 30 is a cross-sectional view taken along the line XXXI-XXXI in FIG. 30, and is an enlarged vertical cross-sectional view of the tool accommodating portion according to the fourth embodiment. FIG. 7 is a front view of a portable cutting machine according to a fourth embodiment. In this figure, the tool accommodating portion is shown in a cross-sectional view taken along the line XXXII-XXXII in FIG. 29. FIG. 7 is a perspective view of a base of a portable cutting machine according to a fourth embodiment. In this figure, the tool storage section is shown in an exploded perspective view. 34 is a plan view of the tool accommodating portion according to the fourth embodiment when viewed from the direction of arrow XXXIV in FIG. 33. FIG. In this figure, the elastic retaining member is shown in a removed state. FIG. 7 is a right side view of a portable cutting machine according to a fifth embodiment. It is a top view of the portable cutting machine based on 5th Embodiment. FIG. 7 is a rear view of the portable cutting machine according to the fifth embodiment. In this figure, the tool accommodating portion is shown in a cross-sectional view taken along the line XXXVII-XXXVII in FIG. 35. FIG. 36 is a cross-sectional view taken along the line XXXVIII-XXXVIII in FIG. 36, and is an enlarged vertical cross-sectional view of the tool accommodating portion according to the fifth embodiment. It is a perspective view of the base of the portable cutting machine based on 5th Embodiment. In this figure, the tool storage section is shown in an exploded perspective view. It is an overall perspective view of the portable cutting machine concerning a 6th embodiment. In this figure, the tool storage section is shown in an exploded perspective view. It is a right view of the portable cutting machine based on 6th Embodiment. 42 is a cross-sectional view taken along the line XLII-XLII in FIG. 41, and is an enlarged cross-sectional view of the tool accommodating portion according to the sixth embodiment. FIG. FIG. 7 is a rear view of the portable cutting machine according to the sixth embodiment. In this figure, the tool accommodating portion is shown in a cross-sectional view along the line XLIII-XLIII in FIG. 41.

Next, embodiments of the present invention will be described based on FIGS. 1 to 43. 1 to 8 show a portable cutting machine 1 according to a first embodiment. As shown in the figure, in this embodiment, a hand-held cutting tool called a rear handle saw is exemplified as the portable cutting machine 1. The portable cutting machine 1 is provided with a main handle 40 extending further rearward from the rear end edge of the base 2, assuming that the user will mainly be working in a standing position to cut a material to be cut at his/her feet.

The portable cutting machine 1 includes a cutting machine main body 10 equipped with a disc-shaped cutting tool 25 called a chip saw that rotates using an electric motor 20 as a drive source, and a base 2 that supports the cutting machine main body 10 on the upper side. ing. The base 2 is provided with a generally rectangular window 2a that is long from front to back. The lower side of the cutting tool 25 is projected to the lower surface side of the base 2 through this window portion 2a. The cutter 25 protruding from the lower surface of the base 2 is cut into the workpiece W to be cut. A main handle 40 is provided at the rear of the cutting machine body 10 to be held by a user. The user is positioned at the rear of the portable cutting machine 1 (on the left side of the paper in FIGS. 1 to 3, on the right side of the paper in FIG. 4), grips the main handle 40, and holds the The cutting process can be progressed by moving it to the left side). In the figure, the direction in which the cutting process progresses is indicated as the cutting progress direction.

In the following description, regarding the front-rear direction of members and structures, the direction in which cutting progresses will be referred to as the front side, and the user side will be referred to as the rear side. Further, the left and right directions of members and structures are used with the user as a reference. As shown in FIGS. 2 to 4, the intersection on the front side between the cutting edge of the cutting tool 25 and the lower surface of the base 2 becomes the part where the workpiece W is first cut (cutting part C). Cutting powder is blown upward from the cutting site C. The blown up cutting powder is collected in the fixed cover 11.

The cutting machine main body 10 includes a fixed cover 11 that covers approximately half the upper circumference of the cutting tool 25. The cutting machine main body 10 is supported on the upper surface of the base 2 in a vertically swingable state via a vertically swinging support shaft 12 provided at the front part of a fixed cover 11. By vertically swinging the cutting machine main body 10 around the vertically swinging support shaft 12, the amount of protrusion of the cutting tool 25 toward the lower surface of the base 2 can be changed. The cutting depth for W can be adjusted.

The cutting machine main body 10 is coupled to a front inclined support portion 4 provided on the upper surface of the base 2 via a vertically swinging support shaft 12 . The front inclined support part 4 includes an angular plate 4a fixed to the upper surface of the base 2 in an upright state, and an inclined bracket supported on the rear side of the angular plate 4a so as to be tiltable left and right via a front left and right inclined support shaft 5. 4b. A front support portion 10a of the cutting machine main body 10 is supported on the inclined bracket 4b via the vertically swinging support shaft 12 described above.

The tilting position of the tilting bracket 4b with respect to the angular plate 4a is fixed by tightening the fixing lever 4c. As shown in FIG. 17, a fixing screw 4f to which a fixing lever 4c is threadedly coupled via a fixing nut 4h is inserted into an arc-shaped guide groove 4g of an angular plate 4a. By tilting the fixing lever 4c, the fixing nut 4h is tightened onto the fixing screw 4f, and the inclined bracket 4b is fixed to the angular plate 4a. By fixing the tilting bracket 4b, the horizontal tilting position of the cutting machine main body 10 is fixed.

As shown in FIG. 4, a rear inclined support part 6 is provided between the rear part of the fixed cover 11 and the rear part of the base 2. The rear side inclined support part 6 includes a base bracket 6a that is supported to be tiltable left and right with respect to the base 2 via a rear side left and right inclined support shaft 7, and a base bracket 6a that is supported with respect to the base 2 so as to be tiltable left and right. It includes a depth guide 6b that is supported so as to be swingable back and forth.

The rear left and right tilting support shaft 7 is arranged coaxially with the front left and right tilting support shaft 5. By tilting the cutting machine body 10 to the left and right via the front left-right tilting support shaft 5 and the rear left-right tilting support shaft 7, the cutting angle of the cutting tool 25 into the workpiece W can be adjusted. As shown in FIG. 6, an angle display 4d indicating the inclination angle of the cutting machine main body 10 is made on the periphery of the angular plate 4a. On the other hand, the inclined bracket 4b is provided with an indicator 4e. By reading the inclination angle indicated by the indicator 4e, the inclination angle of the cutting machine main body 10 can be accurately grasped.

The depth guide 6b has the function of an arcuate guide member that guides the vertical swinging motion of the cutting machine main body 10. The vertical swing position of the cutting machine body 10 is fixed relative to the depth guide 6b by tightening the main body fixing screw 6e through the fixing lever 6f against the handle support portion 13 provided integrally with the fixed cover 11. . As a result, the amount of protrusion of the cutting tool 25 toward the lower surface of the base 2 is fixed, and the cutting depth of the cutting tool 25 into the workpiece W is fixed. The main body fixing screw 6e can be tightened or loosened by vertically swinging the fixing lever 6f.

As shown in FIG. 4, a depth scale 6d indicating the cutting depth of the cutting tool 25 is displayed on the edge of the depth guide 6b. A triangular indicator 13a is displayed on the left side of the handle support portion 13. By reading the depth scale 6d indicated by the indicator 13a, the cutting depth can be set accurately.

As shown in FIG. 4, a white arrow 11a indicating the rotation direction of the cutter 25 is displayed on the side of the fixed cover 11. Since the cutting tool 25 rotates clockwise in FIG. 4, cutting powder is blown upward from the cutting site C. The blown up cutting powder is collected in the fixed cover 11 by riding on the cutting wind generated by the rotation of the cutting tool 25.

As shown in FIGS. 1 to 3, 5, and 6, a dust collection duct 8 is provided at the front and right side of the fixed cover 11. In the figure, the dust collection duct 8 is closed with a cap 9. Although not shown in the figure, a dust collection hose can be connected to the dust collection duct 8 by removing the cap 9. A dust collector can be connected to the dust collection duct 8 via a dust collection hose. A dust collector can efficiently collect the generated cutting powder. A dust bag (dust collection bag) can also be connected to the dust collection duct 8 instead of the dust collection hose. A clean work environment can be maintained by collecting dust with a dust collector or dust bag.

18-20 show the cap 9 removed from the dust collection duct 8. The cap 9 is made of synthetic resin such as rubber and has appropriate elasticity. The cap 9 has a flange portion 9a and a cylindrical portion 9b. The cylindrical portion 9b is elastically fitted into the inner peripheral side of the dust collecting duct 8, and the dust collecting duct 8 is airtightly closed. A circular engagement recess 9c is provided on the inner peripheral side of the cylindrical portion 9b. The cap 9 attached to the dust collection duct 8 can be removed by grasping and pulling the flange portion 9a.

The cap 9 removed from the dust collection duct 8 can be held on the front inclined support part 4 as shown in FIGS. 6 and 17. The removed cap 9 is held on the front surface of the angular plate 4a by elastically fitting the fixing nut 4h into the engaging recess 9c. Further, the cap 9 removed from the dust collection duct 8 can be held on the rear side inclined support part 6 instead of the front side inclined support part 4. The cap 9 is held by elastically fitting a fixing nut 6g screwed onto the main body fixing screw 6e into the engagement recess 9c.

The engagement recess 9c of the cap 9 is provided with a diameter and depth such that the fixing nut 4h of the front inclined support part 4 and the fixing nut 6g of the rear inclined support part 6 are elastically fitted. Cap nuts are used for the fixing nut 4h and the fixing nut 6g, respectively. The fixing nut 4h and the fixing nut 6g protrude from the sides of the fixing lever 4c and the fixing lever 6f, respectively, by an amount corresponding to the depth of the engagement recess 9c. In each figure except FIG. 17, the cap 9 removed from the dust collection duct 8 and held on the front inclined support part 4 or the rear inclined support part 6 is shown by a two-dot chain line. A cap 9 attached to the dust collection duct 8 is shown in solid lines. The cap 9 can be attached to the dust collection duct 8 or held by the fixing nuts 4h, 6g of either the front inclined support part 4 or the rear inclined support part 6. Thereby, the handling of the cap 9 removed from the dust collection duct 8 is improved. Therefore, troubles such as losing the cap 9 can be prevented.

The lower half of the cutting tool 25 is covered with a movable cover 14. The movable cover 14 is supported so as to be openable and closable around the rotation center of the cutting tool 25. When the movable cover 14 is opened, the periphery (cutting edge) of the cutting tool 25 is exposed. Although not visible in the figure, the movable cover 14 is biased in the closing direction by a tension spring. When the movable cover 14 is closed by the spring biasing force, the lower half of the cutter 25 is covered by the movable cover 14 . An opening/closing lever 14a is provided at the rear of the movable cover 14. The user can manually open and close the movable cover 14 by grasping the opening/closing lever 14a. In normal cutting work, as shown in FIGS. 2 to 4, the front end of the movable cover 14 is brought into contact with the end of the material to be cut W, and by moving the portable cutting machine 1 forward while in contact, The movable cover 14 is gradually opened against the biasing force of the spring.

As shown in FIG. 5, an electric motor 20 is attached to the right side of the fixed cover 11 via a reduction gear part 15. The electric motor 20 is mounted in a horizontal position with its motor axis J perpendicular to the surface direction of the cutting tool 25. The reduction gear section 15 has a structure in which a reduction gear train is housed in a gear housing 15a that is integrally provided on the right side of the fixed cover 11. The rotational output of the electric motor 20 is reduced in speed by the reduction gear section 15 and transmitted to the spindle. The fixed cover 11 and the gear housing 15a are integrally formed by die-casting magnesium. An aluminum die-cast motor housing 21 is coupled to the gear housing 15a. The electric motor 20 is housed in a cylindrical motor housing 21 .

The electric motor 20 is a brushless motor in which a rotor is rotatably supported on the inner circumferential side of a cylindrical stator. The electric motor 20 is made more compact in the axial direction (horizontal direction) because it does not require the arrangement of a commutator and brushes on the rotor, for example. A cooling fan is attached to the motor shaft that supports the rotor.

As shown in FIGS. 1 to 3, the left end surface of the motor housing 21 is provided with a plurality of intake holes 21a. When the cooling fan rotates by starting the electric motor 20, outside air is introduced into the motor housing 21 through the plurality of intake holes 21a. The outside air introduced from the intake hole 21a flows toward the output side in the direction of the motor axis J, and the stator and rotor are cooled in the process.

A spindle 17, which is an output shaft of the reduction gear section 15, protrudes into the fixed cover 11 from inside the gear housing 15a. The spindle 17 is arranged parallel to the motor axis J. A cutting tool 25 is attached to the tip of the spindle 17. As shown in FIG. 4, the cutter 25 is sandwiched between the outer flange 25a and the inner flange 25b in a direction perpendicular to the surface, and this sandwiched state is locked by the cutter fixing screw 25c tightened to the tip surface of the spindle 17, so that the spindle 17 so that it cannot be displaced in the axial direction and cannot rotate around the axis. A hexagonal bolt is used as the cutter fixing screw 25c.

As shown in FIGS. 2, 3, and 5, a spindle lock lever 18 is provided near the joint between the gear housing 15a and the motor housing 21 so as to project forward. When the spindle lock lever 18 is pushed in, the spindle lock lever 18 engages with the motor shaft, and the spindle 17 is locked so that it cannot rotate. By locking the spindle 17, convenience is achieved when loosening or tightening the cutter fixing screw 25c.

As shown in FIGS. 1 to 3, a controller accommodating portion 32 is provided on the right side of the fixed cover 11 and behind the electric motor 20. As shown in FIGS. The controller accommodating portion 32 accommodates a controller 33 having a rectangular flat plate shape. The controller 33 includes a control board including a control circuit and a power supply circuit for controlling the operation of the electric motor 20. The controller 33 has a control board housed in a shallow rectangular box-shaped aluminum case, and the control board is molded with resin and insulated. The controller 33 is housed with its upper side tilted in the direction of rearward displacement. As a result, the relatively large controller 33 is housed compactly in both the front-rear direction and the up-down direction.

A control circuit for transmitting a control signal based on the rotor position information detected by the sensor board of the electric motor 20 is mounted on the control board of the controller 33 . Further, the control board is equipped with a drive circuit that switches the current of the electric motor 20 based on a control signal received from the control circuit. Furthermore, the control board includes an auto-stop circuit that cuts off the power supply to the electric motor 20 to prevent over-discharge or over-current conditions depending on the detection result of the state of the battery pack attached to the battery attachment part 30, which will be described below. It is installed.

A battery attachment section 30 is provided behind the controller housing section 32. One slide-mounted battery pack is attached to the battery mounting portion 30. The electric motor 20 is started using the power from the attached battery pack as a power source. The figure shows the battery pack removed. A battery pack is not shown. The battery attachment section 30 includes one terminal block 36, a front wall section 34, and a rear wall section 35.

The battery attachment part 30 is disposed on the back side of the controller accommodating part 32 and on the front side of the main handle 40 in the front-rear direction. A front wall portion 34 is provided at the front of the battery attachment portion 30, and a rear wall portion 35 is provided at the rear. The front and rear walls 34 and 35 are parallel to each other and extend to the right (in the direction away from the cutting tool 25) by the same amount. Both wall portions 34 and 35 extend at substantially the same height in the vertical direction as well. The upper part of the controller accommodating part 32 is connected to the upper part of the front wall part 34.

One battery pack is attached between the front wall section 34 and the rear wall section 35. The battery pack is protected by covering the front and rear parts of the attached battery pack with the front wall part 34 and the rear wall part 35. As shown in FIGS. 1 to 3, a terminal block 36 is disposed at the left end of the battery mounting section 30 at the inner part between the front wall section 34 and the rear wall section 35. As shown in FIGS. A pair of rail receiving portions 36a and positive and negative power terminals 36b and 36c are arranged on the terminal block 36. Two signal terminals 36e are arranged between the positive and negative power supply terminals 36b and 36c. The pair of rail receiving portions 36a extend vertically in parallel to each other at the front and rear portions of the terminal block 36. Positive and negative power terminals 36b and 36c are arranged between the front and rear rail receiving parts 36a. The positive and negative power supply terminals 36b and 36c extend vertically at a constant interval from front to back. A lock recess 36d is provided at the top of the terminal block 36 to lock the battery pack in its attached state. When the lock claw of the battery pack is engaged with the lock recess 36d, the attached state of the battery pack is locked.

The battery pack is attached to the terminal block 36 by sliding it downward, and is removed by sliding it upward. The battery pack can be repeatedly used as a power source by being removed from the battery attachment part 30 and charged with a separately prepared charger. The battery pack is highly versatile and can be reused as a power source for other power tools.

A D-shaped main handle 40 is provided behind the battery attachment part 30. The main handle 40 extends substantially parallel to the surface direction (front-back direction) of the cutting tool 25. The main handle 40 projects rearward from the rear of the battery attachment part 30. The main handle 40 extends further rearward than the rear end of the base 2. As shown in FIGS. 5 to 8, the cutting tool 25 is disposed offset to the left with respect to the main handle 40.

A portion at the rear of the main handle 40 that extends in the vertical direction is a grip portion 41 that is held by the user. A trigger-type switch lever 42 is provided at the top of the grip portion 41. When the switch lever 42 is pulled and operated with the fingertip of the hand holding the grip portion 41, the electric motor 20 is activated and the cutting tool 25 is rotated. The surface of the grip portion 41 and the periphery of the switch lever 42 are coated with an elastomer resin layer to prevent slipping.

A lock-off button 43 is arranged above the switch lever 42. The switch lever 42 is locked in the normal state and cannot be pulled. By pushing the lock-off button 43 with a fingertip, the switch lever 42 is unlocked from the off position and can be pulled. When the pull operation on the switch lever 42 is released, the lock-off state is automatically returned. This prevents the switch lever 42 from being pulled inadvertently. The lock-off buttons 43 are arranged on both left and right sides of the main handle 40. When one of the lock-off buttons 43 is pressed, the lock-off state of the switch lever 42 is released.

The above-mentioned handle support portion 13 is integrally provided at the rear portion of the fixed cover 11. The handle support portion 13 is a die-cast flat plate like the fixed cover 11, and is formed integrally with the fixed cover 11 in this embodiment. The handle support portion 13 is provided so as to protrude rearward from the rear portion of the fixed cover 11. The handle support portion 13 extends parallel to the surface direction of the cutting tool 25. A battery attachment part 30 and a main handle 40 are coupled to the handle support part 13.

A block-shaped pedestal section 37 is provided on the right side of the main handle 40 and on the rear side of the rear wall section 35. A hook 50 is provided on the upper part of the base portion 37. An adapter accommodating section 46 is provided at the lower part of the pedestal section 37 . The former hook 50 is used to hang the portable cutting machine 1 on, for example, a stepladder when not in use. Details of the hook 50 are shown in FIGS. 11-16. The hook 50 includes a hook body 51 bent into a U-shape, and a support portion 52 that supports the hook body 51 movably with respect to the base portion 37 between a use position and a storage position.

The hook body 51 has a U-shape including a base portion 51a, a connecting portion 51b, and a hook portion 51c. The support portion 52 has a cylindrical shape. A base shaft portion 51a of the hook body 51 is inserted into the inner peripheral side of the support portion 52 so as to be rotatable around its axis and displaceable in the axial direction. As shown in FIG. 16, the tip of the base shaft portion 51a protrudes from the opposite end of the support portion 52. As shown in FIG. A spring pin 53 is inserted into the protruding portion in the radial direction. The spring pins 53 protrude from both sides of the base shaft portion 51a in the radial direction.

The portions of the spring pins 53 that protrude to both sides in the radial direction of the base shaft portion 51a are removably inserted into positioning recesses 52a provided at the ends of the support portions 52. The positioning recesses 52a are provided at four equal positions in the circumferential direction (the use position and the storage position). A regulating convex portion 52b is provided between circumferentially adjacent positioning concave portions 52a. The regulating convex portions 52b are provided at two locations facing each other in the circumferential direction. The regulating convex portion 52b is formed high in the axial direction. Therefore, the end portions of the spring pins 53 that protrude to both sides in the radial direction can be displaced in the circumferential direction between the two opposing restriction convex portions 52b. Thereby, the rotation range of the base shaft portion 51a around the axis is restricted to a range of approximately 90°. This defines a use position and a storage position that form an angle of approximately 90° with respect to each other.

A sleeve 51e is attached to the opposite side of the base shaft portion 51a (the connecting portion 51b side). The displacement of the sleeve 51e toward the connecting portion 51b is restricted by the protruding portion 51d. A compression spring 54 is interposed between the sleeve 51e and an engaging portion 52f extending from the inner peripheral side of the support portion 52. The compression spring 54 biases the base shaft portion 51a in the axial direction. As a result, both ends of the spring pin 53 are biased in the direction of entering the positioning recess 52a.

A connecting portion 52c is provided on the supporting portion 52 so as to project downward. A positioning protrusion 52d is integrally provided on the left side of the coupling portion 52c. The coupling portion 52c is coupled to the right side of the pedestal portion 37 with two fixing screws, with the positioning convex portion 52d fitting into the positioning recess provided on the right side of the pedestal portion 37. In the figure, an insertion hole 52e through which two fixing screws are inserted is shown, and illustration of the fixing screws is omitted.

According to the hook 50 exemplified above, the hook main body 51 can be rotated around the axis of the base portion 51a and moved between the upper use position and the lower storage position. In FIG. 14, the hook main body 51 in the use position is shown by a two-dot chain line, and the hook main body 51 in the storage position is shown by a solid line. When the hook main body 51 is taken out to the use position, the hook portion 51c is extended to the right. Thereby, for example, the portable cutting machine 1 can be suspended by positioning a step stool between the base shaft portion 51a and the hook portion 51c. A protrusion 51f is provided on the inner peripheral side of the hook portion 51c of the hook body 51 to prevent the hook from shifting relative to the hook portion (step stool of a stepladder).

The use position and storage position of the hook body 51 are held by the end of the spring pin 53 being elastically fitted into the positioning recess 52a by the biasing force of the compression spring 54. By rotating the hook body 51 around the axis of the base portion 51a against the biasing force of the compression spring 54, the user can take it out to the use position and conversely store it in the storage position. The hook main body 51 is regulated by a regulating convex portion 52b within a range of approximately 90° between the use position and the storage position. Therefore, the hook main body 51 is not displaced upward from the use position, and is prevented from being displaced further to the left from the storage position along the pedestal portion 37.

The pedestal portion 37 has a stepped shape with different heights in the left and right direction. The hook 50 is attached to a higher part on the upper side. An adapter accommodating portion 46 is provided at a lower portion on the lower side. The adapter accommodating portion 46 is protected by being placed at a position deeper in the left-right direction. A communication adapter 47 for short-range wireless communication is housed in the adapter accommodating portion 46 . The communication adapter 47 allows short-range wireless communication between the portable cutting machine 1 and other wireless devices. By short-range wireless communication, a dust collector connected to the dust collection duct 8 via a dust collection hose, for example, is started and stopped in conjunction with the operation of starting and stopping the portable cutting machine 1 . This wireless communication function allows the operator to continue cutting work efficiently while maintaining a clean work environment. Communication adapter 47 can be removed from adapter housing 46 . The removed communication adapter 47 can be used for other compatible power tools.

A front handle 45 is provided on the top of the electric motor 20. The front handle 45 has a gate shape that spans between the upper front surface of the electric motor 20 and the right side of the fixed cover 11. The front handle 45 has a grip portion 45a that is gripped by the user, and left and right leg portions 45b and 45c. A grip portion 45a is supported substantially horizontally between the upper portions of the left and right leg portions 45b and 45c. The left leg 45b is coupled to the right side of the fixed cover 11 with one fixing screw 45d. The right leg 45c is screwed to the motor housing 21 with two fixing screws 45d.

The user can move the portable cutting machine 1 by, for example, gripping the grip part 45a with the right hand and gripping the grip part 41 of the main handle 40 with the left hand. The grip portion 45a is parallel to the base 2, and is inclined in a direction in which the left side is displaced forward when viewed in plan. This inclination allows the grip portion 45a to be gripped more easily with the left hand.

A tool accommodating portion 60 is provided along the lower surface of the main handle 40. The tool accommodating portion 60 according to the first embodiment accommodates a tightening tool 61 used for tightening and loosening a hexagonal bolt by tightening and fixing it and conversely loosening and removing it. In the first embodiment, a box wrench is illustrated as the tightening tool 61. In general, a box wrench is a hand-held tool in the form of a rod that is easy to grasp, and has a hexagonal or polygonal engagement hole at one or both ends that engages the outer circumferential side of the hexagonal head of a hexagonal bolt. As shown in FIG. 21, the tightening tool 61 has a band shape with a constant width, and has a stepped shape bent at two points in the longitudinal direction. A flat portion 61b that is long in the longitudinal direction and a flat portion 61c that is short in the longitudinal direction are provided with respect to the bent portion 61d. One hexagonal engagement hole 61a is provided in the flat portion 61c that is short in the longitudinal direction. One auxiliary hole 61e is provided at the end of the longitudinally long flat portion 61b. The tightening tool 61 can be hung in the auxiliary hole 61e by hooking the tightening tool 61 when taken out from the tool accommodating portion 60.

The tightening tool 61 is used for loosening and loosening work of loosening and removing the cutter fixing screw 25c and conversely tightening and fixing it when replacing the cutter. Position the hexagonal head of the cutter fixing screw 25c in the engagement hole 61a, and rotate it by gripping the long flat part 61b while engaging the engagement hole 61a with the outer circumferential side of the hexagonal head. By doing so, the cutter fixing screw 25c is loosened and tightened. A box wrench having hexagonal or polygonal engagement holes on both sides can also be used as the tightening tool 61.

Details of the tool housing 60 are shown in FIGS. 3, 9 and 10. The tool accommodating portion 60 is a thin plate-shaped cylindrical space capable of accommodating the tightening tool 61, and is provided longitudinally and longitudinally along the lower surface of the main handle 40. The tool accommodating portion 60 is open to the rear. The rear opening corresponds to an entrance 60a through which the tightening tool 61 enters. The entrance port 60a corresponds to the rear end of the tool accommodating portion 60. In this embodiment, a side opening 60b is provided in the entrance 60a. As shown in FIG. 9, the entire tightening tool 61 is housed in the inner part of the entrance 60a. In this embodiment, the lower part and left and right sides (direction perpendicular to the removal direction) of the tightening tool 61 except for the upper part are largely cut out toward the front to form side open parts 60b. In FIG. 9, the tool accommodating portion 60 (inlet 60a) in the case where the side opening portion 60 is not provided is shown by a two-dot chain line. For this reason, the entry port 60a of the tool accommodating portion 60 is shown positioned rearward from the rear end portion of the tightening tool 61.

The side of the housed tightening tool 61 is exposed through the lower and left and right side openings 60b. The user can directly touch the exposed portion with his/her fingertip. Thereby, the tightening tool 61 can be easily grasped and taken out. Almost the entire long flat portion 61b of the tightening tool 61 is inserted into the tool accommodating portion 60. Therefore, from the side open portion 60b of the tool accommodating portion 60, a short flat portion 61c and a bent portion 61d are projected. As a result, approximately more than 60 percent (more precisely, 63 percent) of the tightening tool 61 in the longitudinal direction is accommodated in the tool accommodating portion 60 . The user can grasp and remove less than 40 percent (more precisely, 37 percent) of the area protruding from the opening of the tool accommodating portion 60 .

One elastic member 62 (rubber pin) is attached to the upper surface of the inner wall of the tool accommodating portion 60. When the long flat portion 61b side of the tightening tool 61 is inserted into the tool accommodating portion 60, the elastic member 62 is elastically pressed against the long flat portion 61b. This prevents the tightening tool 61 from rattling or accidentally coming off.

Further, as shown in FIGS. 9 and 10, an elastic pressing portion 60c that is displaced one step inward in the thickness direction is provided on the lower surface of the back (front) portion of the tool accommodating portion 60. When the tightening tool 61 is accommodated in the tool accommodating portion 60, the elastic pressing portion 60c is elastically pressed against the front lower surface of the tightening tool 61. In addition to the elastic member 62, the elastic pressing portion 60c also prevents the tightening tool 61 from rattling or accidentally coming off.

According to the portable cutting machine 1 according to the first embodiment described above, when the cutting machine main body 10 is displaced upward in order to reduce the cutting depth of the cutting tool 25, for example, when the cutting machine main body 10 is displaced upward, The tightening tool 61 is displaced integrally with the cutting machine body. Therefore, the tightening tool is less likely to get in the way of work, unlike the conventional case where the tightening tool is held so as to protrude sideways from the base.

The entry port 60a of the tool accommodating portion 60 is provided with a side opening portion 60b that exposes the lower side and left and right sides of the tightening tool 61. The user can directly contact the tightening tool 61 with his or her fingertips through the side opening 60b. Thereby, the tightening tool 61 can be easily grasped and taken out from the tool accommodating portion 60.

Further, an elastic member 62 and an elastic pressing portion 60c that are elastically pressed against the tightening tool 61 are attached to the tool accommodating portion 60. Thereby, a commonly available tightening tool 61 can be accommodated in the tool accommodating portion 60 without requiring a cutout like a conventional dedicated wrench. Therefore, the versatility of the tool accommodating portion 60 is increased.

Furthermore, a tool storage section 60 is arranged below the main handle 40. As a result, the protruding portions (short flat portion 61c and bent portion 61d) of the tightening tool 61 inserted into the tool accommodating portion 60 are projected from the opening of the tool accommodating portion 60 along the lower surface of the main handle 40. Therefore, since the protrusion of the tightening tool 61 is hidden and guarded below the main handle 40, the protrusion is less likely to get in the way.

Various changes can be made to the first embodiment described above. For example, the location where the tightening tool 61 is accommodated is not limited to the location below the main handle 40, but can be changed to another location. 22 to 24 show a second embodiment in which a tool accommodating portion 65 is provided in the grip portion 45a of the front handle 45. FIG. No changes are required except for the part where the tool accommodating part 65 is provided. For members and structures that do not require change, the same reference numerals will be used and the description thereof will be omitted.

The front handle 66 includes leg portions 45b and 45c at both left and right ends of a grip portion 67. The left and right legs 45b, 45c are connected to the right side of the fixed cover 11 and the motor housing 21 with fixing screws 45d, as in the first embodiment. The grip portion 67 is provided with a tool accommodating portion 65 that penetrates in the left-right direction. An opening 65a on the right side of the tool accommodating portion 65 is formed to be slightly wider than an opening 65b on the left side. In the second embodiment, the tightening tool 61 is entered through the opening 65a on the right side of the tool accommodating portion 65, and conversely is taken out.

In FIGS. 22 and 23, the entrance 65e of the tool accommodating portion 65 is indicated by a two-dot chain line. An opening 65a is provided by cutting out the upper wall and the front and rear walls of the entire circumference of the entrance 65e. The opening 65a corresponds to a side opening. By removing a part of the periphery of the entrance 65e (the right end of the tool accommodating part 65) and providing an opening 65a, the front and rear edges of the housed tightening tool 61 are exposed to the front and rear, and the top surface is exposed. exposed above. Thereby, the user can easily take out the tightening tool 61 by directly touching the fingertip to the portion exposed in the opening 65a.

As shown in FIG. 23, one leaf spring 68 is attached near the opening 65b on the left side of the tool accommodating portion 65. When the tightening tool 61 is accommodated in the tool accommodating portion 65, the leaf spring 68 is elastically engaged with the auxiliary hole 61e of the tightening tool 61. This prevents the tightening tool 61 from wobbling and from accidentally coming off.

As shown in FIGS. 22 and 23, a pair of front and rear cradle portions 65c are provided within the tool accommodating portion 65. The pedestal portion 65c is provided from a slightly deeper part of the right opening 65a to near the left opening 65b. Both sides of the tightening tool 61 in the width direction are received from below by the front and rear cradle portions 65c. Therefore, the leaf spring 68 elastically presses and holds the tightening tool 61 against the pedestal portion 65c. Further, the bent portion 61d is brought into contact with the bottom portion 65d of the tool accommodating portion 65.

According to the tool storage section 65 according to the second embodiment, the dead space of the front handle 66 can be effectively utilized to store the tightening tool 61 out of the way.

25 to 27 show a tool accommodating portion 70 according to a third embodiment. The tool accommodating portion 70 according to the third embodiment is provided on the right side of a half-split handle housing 40a that forms the outer shell of the main handle 40. In the case of the third embodiment, constraints are added in the left-right width direction and the height direction with respect to the area where the battery mounting portion 30 and the controller accommodating portion 32 shown in the first embodiment are arranged.

A cradle portion 40c is integrally provided on the right side of the right housing 40b of the handle housing 40a. The pedestal portion 40c is provided so as to protrude to the right side. A housing cover 71 is coupled along the upper surface of the pedestal portion 40c. FIG. 28 shows the accommodation cover 71 alone. The accommodation cover 71 has a top plate portion 71a and a side wall portion 71b. A spring portion 71c is provided at the front portion of the top plate portion 71a. The spring portion 71c is integrally formed with the top plate portion 71a by making a U-shaped cut during molding.

A positioning protrusion 71d is integrally provided on the left edge of the top plate portion 71a. The accommodation cover 71 is fixed to the pedestal part 40c with the positioning convex part 71d inserted into the positioning hole 40d of the right housing 40b and positioned. The housing cover 71 is attached with a side wall portion 71b connected to the right side of the pedestal portion 40c with two fixing screws 71e.

A tool accommodating portion 70 for accommodating the tightening tool 61 is formed between the accommodating cover 71 and the pedestal portion 40c. The rear end of the pedestal portion 40c corresponds to the entrance 70a of the tool accommodating portion 70. The longitudinal length of the accommodation cover 71 is smaller than the longitudinal length of the pedestal portion 40c. Accordingly, in the third embodiment as well, the upper part (top wall part) and the right part (right wall part) of the entire circumference of the entrance 70a are removed to form the side open part 70b. The accommodated tightening tool 61 is exposed upward and to the right side by the side opening portion 70b.

In the third embodiment, the tightening tool 61 is taken in and taken out from the rear opening 71f (the rear end of the storage cover 71), which is provided by omitting the entrance 70a of the tool storage portion 70. When the tightening tool 61 is accommodated as shown in FIG. 27, almost the entire long flat portion 61b is accommodated below the accommodation cover 71. The short flat portion 61c and bent portion 61d of the tightening tool 61 are accommodated in a state protruding from the opening 71f. The user can hold the protruding portion of the tightening tool 61 as a gripping portion by directly contacting the upper surface or the right side portion exposed in the side opening portion 70b with the fingertips. The user can grasp the protruding portion and store it in the tool storage section 70, and conversely pull it out from the tool storage section 70.

Further, when the tightening tool 61 is housed in the tool accommodating portion 70, the spring portion 71c is elastically fitted into the auxiliary hole 61e, and the tightening tool 61 is pressed against the pedestal portion 40c. This prevents the tightening tool 61 from rattling within the tool accommodating portion 70, and also prevents the tightening tool 61 from accidentally coming out of the tool accommodating portion 70.

A relief recess 40e is provided on the rear side of the pedestal portion 40c, with which the tip of the short flat portion 61c of the tightening tool 61 is engaged. As shown in FIGS. 25 and 27, the engagement of the tip of the short flat portion 61c with the edge of the relief recess 40e also prevents the housed tightening tool 61 from wobbling and from coming out inadvertently. Further, in addition to the side opening portion 70b, the relief recess 40e also makes it easier to pick up the short flat portion 61c, which facilitates storage and removal.

Also with the tool accommodating portion 70 according to the third embodiment, it is possible to store the tightening tool 61 in the cutting machine main body 10 by effectively utilizing the dead space of the cutting machine main body 10. Thereby, convenience is achieved when exchanging the cutting tool, and the tightening tool 61 can be stored compactly so as not to get in the way.

29 to 34 show a tool accommodating portion 80 according to a fourth embodiment. A tightening tool 81 called a T-type box wrench (American name: T-handle socket wrench/British name: T-handle Socket spanner) is housed in the tool storage portion 80 of the fourth embodiment. As shown in FIG. 32, the tightening tool 81 has a holder portion 81a in which a hexagonal engagement hole 81b is formed, and a handle portion 81c extending from the holder portion 81a to both sides. By gripping the handle portion 81c and rotating the holder portion 81a with the cutter fixing screw 25c fitted into the engagement hole 81b, the cutter fixing screw 25c can be tightened and conversely loosened.

The tool accommodating portion 80 of the fourth embodiment is provided on the base 2. The tool storage section 80 is provided below the battery attachment section 30. The fourth embodiment may be the same as the first embodiment except for the tool accommodating portion 80. For members and structures that do not require change, the same reference numerals will be used and the description thereof will be omitted.

As shown in FIG. 34, the upper surface of the base 2 is provided with two stepped portions 2b extending in parallel in the left-right direction. A flat recess 2c is provided between the two step portions 2b. A holding member 82 is attached to the recess 2c. As shown in FIG. 33, the holding member 82 has a flat base portion 82a and a U-shaped holding portion 82b. The base portion 82a and the holding portion 82b are integrally formed by molding. The holding member 82 is attached to the upper surface of the base 2 with the base part 82a fitted into the recess 2c of the step part 2b and positioned. The holding member 82 is fixed by tightening a fixing screw 83 inserted into the insertion hole 82c of the base portion 82a into the screw hole 2d.

The holding part 82b of the holding member 82 has a cylindrical shape that is elastic and can elastically hold the holder part 81a of the tightening tool 81. The holder part 81a can be pushed into the holding part 82b, which is an elastic member, from above and held elastically. Thereby, the tightening tool 81 is housed in a horizontal position with the holder portion 81a positioned along the upper surface of the base 2. The handle portions 81c on both sides are accommodated along the edges of the base 2. The tightening tool 81 is housed in a position that does not protrude from the edge of the base 2 in plan view. Further, the tightening tool 81 is compactly accommodated in a gap between the battery pack attached to the battery attachment part 30 and the base 2.

The tightening tool 81 can be removed from the tool accommodating part 80 by lifting the holder part 81a upward against the elastic force of the holding part 82b. The removed tightening tool 81 can be used to rotate the cutter fixing screw 25c to quickly perform the cutter replacement work.

According to the tool accommodating portion 80 according to the fourth embodiment, the tightening tool 81, which is relatively large and heavy, is held in the tool accommodating portion 80 with a compact structure mainly including the holding member 82. The tightening tool 81 is housed in a compact manner so that it does not protrude from the upper surface of the base 2, and is less likely to get in the way.

According to the tool accommodating portion 80 according to the fourth embodiment, the holder portion 81a is held by the elastic member, and the tightening tool 81 is accommodated in the tool accommodating portion 80. Therefore, since the tightening tool 81 is held between the elastic members at a position closer to the center of gravity, the tightening tool 81 is housed in a stable state.

35 to 39 show a tool accommodating portion 85 according to a fifth embodiment. A tightening tool 81 is accommodated along the upper surface of the base 2 by the tool accommodating portion 85 according to the fifth embodiment. The holding member 86 according to the fifth embodiment is different from the holding member 82 according to the fourth embodiment. The handle portion 81c of the tightening tool 81 is elastically held by the holding member 86 according to the fifth embodiment.

As shown in FIG. 37, a pair of front and rear retaining walls 86a are integrally provided on the upper surface of the base 2. The front and rear holding walls 86a are provided to extend upward from the stepped portion 2b of the base 2. The holder part 81a is accommodated between the two front and rear holding wall parts 86a. The upper portions of the two front and rear holding walls 86a are bent to the right. As shown in FIG. 39, an elastic member 87 is attached to the rear upper bent portion 86b. A cylindrical rubber pin is used as the elastic member 87. The elastic member 87 protrudes from the lower surface of the upper bent portion 86b. A base portion 81d of a handle portion 81c extending from the holder portion 81a to both front and rear sides is fitted between the front and rear upper bent portions 86b and the upper surface of the base 2. An elastic member 87 is elastically pressed against the base portion 81d of the rear handle portion 81c. This prevents the handle portion 81c and, in turn, the tightening tool 81 from wobbling or from being accidentally removed from the tool housing portion 85.

Similar to the fourth embodiment, in the tool accommodating portion 85 of the fifth embodiment, the tightening tool 81 is accommodated in a horizontal position along the upper surface of the base 2. Moreover, it is housed in such a manner that it does not protrude from the outer contour of the base 2 in plan view. Thereby, the tightening tool 81 is housed in a compact manner so as not to interfere with the work. In the case of the fifth embodiment, the tightening tool 81 is moved from the right side of the base 2 to the left side in a horizontal position, and the holder part 81a is moved along the base 2. As a result, the front and rear handle portions 81c are pushed into the gap between the upper bent portion 86b of the holding wall portion 86a and the base 2, and the tightening tool 81 is housed in the tool housing portion 85. Therefore, the ease of attachment and detachment of the tightening tool 81 to and from the elastic member 87 is improved, and the tightening tool 81 is housed on the base in a stable horizontal position along the base 2.

40 to 43 show a tool accommodating section 90 according to a sixth embodiment. The tool accommodating portion 90 according to the sixth embodiment is provided on the cutting machine main body 10 side as in the first to third embodiments. For members and structures that do not require change, the same reference numerals will be used and the description thereof will be omitted. In the sixth embodiment, unlike the first to third embodiments, the hook 50 is omitted. A tool accommodating section 90 according to the sixth embodiment is provided on the upper part of the pedestal section 37 instead of the hook 50. At the lower part of the pedestal part 37, an adapter accommodating part 46 is provided, in which a communication adapter 47 for short-range wireless communication is attached, as in the first to fifth embodiments.

A circular accommodation recess 91 is provided on the right side of the base portion 37. The holder portion 81a of the tightening tool 81 is inserted into the accommodation recess 91. A holding recess 92 is provided below the accommodation recess 91 . One screw hole 92a is provided in the holding recess 92. A holding member 93 as an elastic member is attached to the holding recess 92 . Like the holding member 82 according to the fourth embodiment, the holding member 93 has a flat base portion 93a and a U-shaped holding portion 93b. The base portion 93a and the holding portion 93b are integrally formed by molding. The holding member 93 is attached to the right side of the pedestal 37 with the base 93a fitted into the holding recess 92 and positioned. The holding member 93 is fixed by tightening a fixing screw 94 inserted into the insertion hole 93c of the base portion 93a into the screw hole 92a.

The holding portion 93b of the holding member 93 has an elastic cylindrical shape that can elastically hold the handle portion 81c of the tightening tool 81 by holding it therebetween. While inserting the holder part 81a into the accommodation recess 91, the handle part 81c is pushed into the holding part 93b, which is an elastic member, from the right side to be held elastically. As a result, the tightening tool 81 is accommodated in the tool accommodating portion 90. The tightening tool 81 is housed in a horizontal position with the handle portion 81c positioned along the right side of the base portion 37. The handle portions 81c on both sides are held in a state extending vertically along the right side of the base portion 37.

The tool accommodating portion 90 according to the sixth embodiment is provided in the cutting machine main body 10 similarly to the first to third embodiments. Therefore, the tightening tool 81 is housed integrally in the cutting machine main body 10. For this reason, for example, when the cutting machine main body 10 is displaced upward in order to reduce the cutting depth of the cutting tool 25, the tightening tool 81 is displaced together with the cutting machine main body 10. For this reason, it is less likely to interfere with work, unlike in the case of the conventional structure in which it is held so as to protrude laterally from the base 2.

Further, the tool accommodating portion 90 holds the tightening tool 81 in a state in which a part of the holder portion 81a is accommodated and the handle portion 81c is not accommodated. Therefore, the handle portion 81c can be easily gripped, and the attachment and detachment from the tool storage portion 90 can be improved.

Furthermore, according to the sixth embodiment, a holding member 93 that removably holds the handle portion 81c of the tightening tool 81 is provided on the pedestal portion 37 of the cutting machine main body 10. Therefore, the tightening tool 81 is housed in the cutting machine main body 10 in a compact manner while ensuring gripability of the handle portion 81c.

The cutting machine main body 10 includes a main handle 40 extending further rearward from the rear end of the base 2. The tool accommodating portion 90 according to the sixth embodiment is arranged between the electric motor 20 and the main handle 40 when viewed from the side. Therefore, the dead space of the cutting machine body 10 is effectively utilized and the tightening tool 81 is housed compactly so as not to get in the way.

As explained above, according to the tool accommodating parts 60, 65, 70, 80, 85, and 90 according to each embodiment, the main handle 40 is arranged to extend further rearward from the rear end of the base 2. The portable cutting machine 1 is housed compactly so that the tightening tool 61 and the tightening tool 81 do not get in the way. This facilitates the cutting tool replacement work.

Each of the embodiments described above can be implemented with further changes. Applicable tightening tools for tool replacement include box wrench (American name: Box wrench/British name: Ring spanner) and T-shaped box wrench (American name: T-handle Socket wrench/British name: T-handle Socket spanner) ). For example, instead of the hexagonal engagement hole 61a, a spanner (American name: Open-end wrench/British name: Open-end spanner) that has a bifurcated engagement part that engages two opposing sides of a hexagonal bolt, or one end The tool accommodating parts 60, 65, and 70 according to the first to third embodiments can also be applied to a combination wrench (American name: Combination wrench/British name: Combination spanner) having a hexagonal hole at one end and a bifurcated part at the other end. . Moreover, instead of the T-type box wrench, it can be applied to an L-type box wrench (American name: L-handle socket wrench/British name: L-handle Sccket spanner). A socket wrench (American name: Interchangeable Socket wrench/British name: Interchangeable Socket spanner) in which the handle part and the holder part (socket) are separate and whose applicable size can be exchanged is provided in the tool storage parts 80 and 85 of the fourth to sixth embodiments. , 90.

Although the case where the cutter fixing screw 25c is a hexagonal bolt that is tightened to the female threaded portion of the spindle is illustrated, the case where the cutter fixing screw 25c is a hexagonal nut that is tightened to the male threaded portion of the spindle to fix the cutter is also applicable to the illustrated tool accommodating portions 60, 65, and 70. , 80, 85, 90 can be applied. In the present disclosure, it is assumed that a hexagonal nut is included in a hexagonal bolt.

Instead of the elastic member 62 of the first embodiment, the leaf spring 68 of the second embodiment, and the spring portion 71c of the third embodiment, a ball plunger in which a steel ball is biased by a spring may be used. Further, a structure may be adopted in which a magnet is used instead of the elastic member. By using a holding means such as a ball plunger or a magnet, a tightening tool such as the tightening tool 61 can be accommodated in the tool accommodating portion 60, 65, 70 without wobbling, and inadvertent withdrawal is prevented.

As the portable cutting machine 1, a rear handle saw in which the main handle 40 largely protrudes rearward is illustrated, but an ordinary portable circular saw with a more compact handle part also has the tool storage parts 60, 65, and 65 illustrated in each embodiment. 70, 80, 85, and 90 can be applied. Further, as a portable cutting machine, a cutter using a diamond wheel as a cutting tool instead of a chip saw can be similarly applied. Further, although a DC machine using a battery pack as a power source is illustrated, the tool storage sections 60, 65, 70, 80, 85, and 90 can also be applied to an AC machine using a commercial 100V power source.

W...Material to be cut 1...Portable cutting machine (rear handle saw)
2...Base 2a...Window part, 2b...Step part, 2c...Concave part, 2d...Screw hole 4...Front side inclined support part 4a...angular plate, 4b...Inclination bracket, 4c...Fixed lever 4d...Angle display, 4e...Indicator , 4f...Fixing screw, 4g...Guide groove, 4h...Fixing nut 5...Front left and right inclined support shaft 6...Rear side inclined support part 6a...Base bracket, 6b...Depth guide, 6c...Back and forth rotation axis, 6d...Depth Scale 6e...Body fixing screw, 6f...Fixing lever, 6g...Fixing nut 7...Rear left and right inclined support shaft 8...Dust collecting duct 9...Cap 9a...Flange part, 9b...Cylindrical part, 9c...Engaging recess 10...Cutting Machine body 10a...Front support part 11...Fixed cover 11a...White arrow (rotation direction of cutting tool)
12...Vertical swing support shaft 13...Handle support part 13a...Indicator 14...Movable cover, 14a...Opening/closing lever 15...Reduction gear part 15a...Gear housing 17...Spindle 18...Spindle lock lever 20...Electric motor 21...Motor housing 21a …Intake hole J…Motor axis 25…Cutter 25a…Outer flange, 25b…Inner flange, 25c…Cutter fixing screw C…Cutting part 30…Battery attachment part (first embodiment)
32...Controller housing part 33...Controller 34...Front wall part 35...Rear wall part 36...Terminal block 36a...Rail receiving part, 36b...Power terminal (positive), 36c...Power terminal (negative)
36d...lock recess, 36e...signal terminal 37...pedestal part 40...main handle 40a...handle housing, 40b...right housing, 40c...cradle part, 40d...positioning hole 40e...release recess 41...grip part 42...switch lever 43 ...Lock-off button 45...Front handle 45a...Gripping part, 45b, 45c...Legs, 45d...Fixing screw 46...Adapter accommodating part 47...Communication adapter 50...Hook 51...Hook body 51a...Base part, 51b...Connection part, 51c...Hook part, 51d...Protrusion 51e...Sleeve, 51f...Protrusion 52...Support part 52a...Positioning recess, 52b...Regulation protrusion, 52c...Joining part, 52d...Positioning protrusion 52e...Insertion hole, 52f... Engagement part 53...Spring pin 54...Compression spring 60...Tool accommodating part (first embodiment)
60a...Entry port, 60b...Side opening portion 61...Tightening tool (box wrench)
61a...Engagement hole, 61b...Long flat part, 61c...Short flat part, 61d...Bending part, 61e...Auxiliary hole 62...Elastic member (rubber pin)
65...Tool storage part (second embodiment)
65a...opening (right side), 65b...opening (left side), 65c...cradle part, 65d...bottom part 65e...entry port 66...front handle 67...gripping part 68...leaf spring 70...tool storage part (third embodiment)
70a...Entrance port, 70b...Side opening portion 71...Accommodation cover 71a...Top plate part, 71b...Side wall part, 71c...Spring part, 71d...Protrusion part, 71e...Fixing screw 71f...Opening 80...Tool storage part (No. 4 embodiments)
81...Tightening tool (box wrench)
81a... Holder part, 81b... Engagement hole, 81c... Handle part, 81d... Base 82... Holding member 82a... Base part, 82b... Holding part, 82c... Insertion hole 83... Fixing screw 85... Tool accommodating part (fifth Embodiment)
86...Holding member 86a...Holding wall part, 86b...Upper bending part 87...Elastic member 90...Tool accommodating part (6th embodiment)
91... Accommodating recess 92... Holding recess 92a... Screw hole 93... Holding member 93a... Base part, 93b... Holding part, 93c... Insertion hole 94... Fixing screw

Claims (11)

A portable cutting machine,
a base that comes into contact with the material to be cut;
a cutting machine main body that is supported by the base and includes an electric motor that rotates a disc-shaped cutting tool;
A T-shaped box wrench having a holder portion formed with an engagement hole to be engaged with a hexagonal bolt, and two handle portions extending from the holder portion to both sides ;
a tool accommodating portion having an elastic member that removably elastically holds the T-shaped box wrench on the base or the cutting machine body ;
When the T-shaped box wrench is held in the tool accommodating portion, at least one of the two handle portions is arranged such that the periphery of the handle portion is orthogonal to each other in the radial direction when viewed from the longitudinal direction of the handle portion. A portable cutting machine in which three of the four directions are open and abutting parts are positioned facing each other in the remaining one direction . The portable cutting machine according to claim 1,
A portable cutting machine in which both of the two handle portions are open in the three directions, and the abutment portions are positioned opposite to each other in the one direction. The portable cutting machine according to claim 1 or 2,
The T-shaped box wrench is a mobile phone that is housed in the tool accommodating portion without protruding outward from the edge of the base in a plan view, and with the longitudinal direction of the holder portion being positioned perpendicular to the plane of the cutting tool. cutting machine. The portable cutting machine according to any one of claims 1 to 3 ,
A portable cutting machine, wherein the elastic member is provided on the base so as to hold the T-shaped box wrench on the upper surface of the base. The portable cutting machine according to any one of claims 1 to 4 ,
A portable cutting machine in which the holder portion is held by the elastic member. The portable cutting machine according to any one of claims 1 to 5 ,
A portable cutting machine, wherein a housing portion is formed on the base to accommodate the handle portion when the holder portion is moved along the base. The portable cutting machine according to any one of claims 1 to 6 ,
A portable cutting machine, wherein the tool accommodating portion is formed in the cutting machine main body. The portable cutting machine according to any one of claims 1 to 7 ,
In the portable cutting machine, the tool accommodating section accommodates a part of the holder section and holds the T-shaped box wrench without accommodating the handle section. The portable cutting machine according to any one of claims 1 to 8 ,
A portable cutting machine, wherein the elastic member for removably holding the base of the handle portion of the T-shaped box wrench is provided on the cutting machine main body. A portable cutting machine according to any one of claims 1 to 9 ,
a handle extending from the cutting machine body;
A portable cutting machine, wherein the tool accommodating portion is disposed between the electric motor and the handle within the cutting machine main body. A portable cutting machine according to any one of claims 1 to 10 ,
A portable cutting machine having a handle disposed behind the rear end of the base from the cutting machine main body.

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