JP2021186917A - Portable cutting machine - Google Patents

Abstract

To solve the problem in which: a circular disc typed blade tool is fixed to a spindle by a hexagon head bolt in a portable cutting machine that is called a rear handle saw; a closed wrench or a box wrench is required to screw the hexagon head bolt when exchanging the blade tool; convenience for exchanging a blade tool is attained if the portable cutting machine is equipped with the tool; and the tool should be installed at a portion for avoiding troubles when the portable cutting machine is used.SOLUTION: A tool housing part 60 is given in which a strip-shaped fastening tool 61 is accommodated downwardly along a main handle 40. The fastening tool 61 is held while a part thereof is exposed at a lateral open part of the tool housing part 60. Accommodation to and extraction from the tool housing part 60 is conveniently performed by gripping the exposed part. It is accommodated downwardly along the main handle 40 so that the fastening tool 61 hardly becomes an obstacle for cutting operation even if depth of cutting is shallowed by upwardly displacing the cutting machine body 10.SELECTED DRAWING: Figure 3

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 plate-shaped base whose lower surface is brought into contact with the 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 with respect to the output shaft, or conversely tighten it with an appropriate torque. The fixing bolt is, for example, a hexagon bolt or a hexagon socket head cap screw. When loosening or tightening the hexagon bolt, a tool such as a hexagon wrench is used.

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

U.S. Pat. No. 9,333,638

However, the tightening tool holding technique disclosed in Patent Document 1 targets a dedicated box wrench, and a general commercial product cannot be used. In addition, the wrench protrudes greatly from the end of the base to facilitate attachment and detachment. Therefore, for example, when the cutting depth of the cutting tool is made shallow, the wrench tends to interfere with the work. Also, if this technique is applied to a box wrench or box wrench for hex bolts, which is usually larger than a hex bar spanner, more space is required. For this reason, it is necessary to have a structure that can compactly hold the tightening tool for hexagon bolts, which is relatively large, so as not to interfere with the work. Further, since neither a box wrench that can be held in the main body of the cutting machine nor a box wrench that can be held in the base is provided, it has been requested to provide a technique for holding this type of tightening tool.

According to one feature of the present disclosure, the portable cutting machine includes a cutting machine main body equipped with an electric motor for rotating a disk-shaped cutting tool, and a tightening tool that engages with the outer circumference of the hexagon bolt when tightening the hexagon bolt. Have. The cutting machine main body has a tool accommodating portion for detachably accommodating the tightening tool and projecting a part of the tightening tool. The tool accommodating portion has a tubular shape extending in the removing direction of the tightening tool. The entrance of the tool accommodating portion has a side opening portion notched so that the tightening tool is exposed in a direction orthogonal to the removal direction. Therefore, the tightening tool is expropriated to the tool accommodating portion formed in the cutting machine main 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 tightening tool is displaced integrally with the cutting machine main body. For this reason, this structure is less likely to interfere with the work as in the case of the conventional configuration 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 portion is a part of the entire circumference of the cylindrical entrance, and is in the extending direction of the tool accommodating portion (inward direction of the tightening tool) for a part of the upper, lower, left, and right sides of the tightening tool. It is cut out and provided. Therefore, the entrance / exit of the tool accommodating portion has an uneven shape in the front-rear direction, which is the entry / exit direction of the tightening tool. The recessed recess in the approach direction around the entrance corresponds to the side opening. The side opening exposes the tightening tool to the side, making it easier for the fingertips to come into contact with the tightening tool during removal. This facilitates the removal of the tightening tool.

According to other features of the present disclosure, elastic members are provided in the tool housing. The elastic member elastically presses the tightening tool in a direction orthogonal to the removal direction. Therefore, the elastic member can hold the tightening tool even if the tightening tool has various shapes or sizes. This gives an appropriate resistance in the removal direction and ensures that the tightening tool is held in the accommodation position.

According to other features of the present disclosure, it has a handle that extends from the cutting machine body. A part of the tightening tool inserted into the tool housing protrudes rearward from the tool housing along the lower surface of the handle, and the tool housing is a cutting machine so that the entire tightening tool fits forward from the rear end of the handle. It is formed on the main body. Therefore, the protruding portion of the housed tightening tool is hidden under the handle. Moreover, the protrusion is guarded by the handle. Further, the protruding portion is less likely to get in the way when working on the cutting machine body.

According to other features of the present disclosure, the portable cutting machine has a base that comes into contact with the material to be cut and a cutting machine body that is supported by the base. The cutting machine main body is equipped with an electric motor for rotating a disk-shaped cutting tool. The box wrench that tightens the hex bolt is removably and elastically held by an elastic member on the base or the cutting machine body. Therefore, a relatively large and heavy box wrench is held in the tool housing in a compact configuration.

According to other features 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 has a holder portion formed with an engaging hole engaged with a hexagon bolt and a handle portion extending laterally from the holder portion. The holder portion is held by an elastic member, and the box wrench is accommodated in the tool accommodating portion. Therefore, the box wrench is sandwiched by the elastic member near the center of gravity and is accommodated in the tool accommodating portion in a stable state.

According to another feature of the present disclosure, the box wrench has a holder portion formed with an engaging hole engaged with a hexagon bolt and a handle portion extending laterally from the holder portion. An accommodating portion for accommodating the handle portion when the holder portion is moved along the base is formed in the base. Therefore, the attachment / detachment of the box wrench to the elastic member is enhanced, and the box wrench is accommodated on the base in a stable lateral posture 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 main 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 integrally with the cutting machine main body. As a result, in this structure, it is less likely that the tool will interfere with the work as in the case of the conventional configuration in which the tool is held by protruding laterally from the base.

According to another feature of the present disclosure, the box wrench has a holder portion formed with an engaging hole engaged with a hexagon bolt and a handle portion extending laterally from the holder portion. The tool accommodating portion holds the box wrench in a state of accommodating a part of the holder portion and not accommodating the handle portion. Therefore, the handle portion can be easily gripped and the box wrench can be easily attached to and detached from the tool accommodating portion.

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

According to other features of the present disclosure, it is provided with a handle that extends from the cutting machine body. A tool accommodating portion is arranged in the main body of the cutting machine between the electric motor and the handle. Therefore, the dead space of the cutting machine main body is effectively utilized, and the box wrench is compactly housed in the cutting machine main body so as not to get in the way.

According to other features of the present disclosure, the portable cutting machine has a handle located rearward from the rear end of the base from the cutting machine body. Therefore, the rear handle saw is compactly housed so that the box wrench and the box wrench do not get in the way. This facilitates the cutting tool replacement work.

It is an overall perspective view of the portable cutting machine which concerns on 1st Embodiment. It is a right side view which looked at the portable cutting machine from the direction of arrow II in FIG. FIG. 3 is a side view showing a part of the portable cutting machine shown in FIG. 2 in cross section. It is a left side view of a portable cutting machine seen from the direction of arrow IV in FIG. 1. It is the top view which looked at the portable cutting machine from the direction of arrow V in FIG. It is a front view which looked at the portable cutting machine from the direction of the arrow VI in FIG. It is a rear view of a portable cutting machine as seen from the direction of arrow VII in FIG. 2. It is the bottom view which looked at the portable cutting machine from the direction of arrow VIII in FIG. It is a vertical cross-sectional enlarged view of the tool accommodating part which concerns on 1st Embodiment. It is a bottom view of the tool accommodating part which concerns on 1st Embodiment. It is a right side view of the hook in the stored state. It is a perspective view of the hook in a stored state. This figure shows the state seen from the left side. It is a left side view of the hook in the stored state. FIG. 3 is a front view of the hook in the stored state as viewed from the direction of arrow XIV in FIG. It is a rear view of the hook in the stored state as seen from the direction of the arrow XV in FIG. FIG. 13 is a cross-sectional view taken along the line XVI-XVI in FIG. 13 of the hook. It is a left side view of the front part of the base of the portable cutting machine which concerns on 1st Embodiment. In this figure, the angular plate and the fixing lever are shown in a vertical cross section (XVII-XVII line cross section in FIG. 6). It is a perspective view of the cap for a dust collection duct. It is a side view of the cap for a dust collecting duct. It is a bottom view of the dust collecting duct cap seen from the direction of arrow XX in FIG. 19. It is the whole perspective view of the lever type wrench. It is a perspective view of the tool accommodating part which concerns on 2nd Embodiment. It is a vertical sectional view of the tool accommodating part which concerns on 2nd Embodiment. FIG. 23 is a sectional view taken along 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 which concerns on 3rd Embodiment. It is an exploded perspective view of the tool accommodating part which concerns on 3rd Embodiment. It is a vertical sectional view of the tool accommodating part which concerns on 3rd Embodiment. It is a perspective view of the accommodating wall portion of the tool accommodating portion which concerns on 3rd Embodiment. This figure shows a state seen from diagonally lower left. It is a right side view of the portable cutting machine which concerns on 4th Embodiment. It is a top view of the portable cutting machine which concerns on 4th Embodiment. FIG. 30 is a cross-sectional view taken along the line XXXI-XXXI in FIG. 30, which is an enlarged vertical cross-sectional view of the tool accommodating portion according to the fourth embodiment. It is a front view of the portable cutting machine which concerns on 4th Embodiment. In this figure, the tool accommodating portion is shown in FIG. 29 as a cross-sectional view taken along the line XXXII-XXXII. It is a perspective view of the base of the portable cutting machine which concerns on 4th Embodiment. In this figure, the tool accommodating portion is shown in an exploded perspective view. FIG. 3 is a plan view of the tool accommodating portion according to the fourth embodiment as viewed from the direction of arrow XXXIV in FIG. 33. In this figure, the elastic holding member is shown in a removed state. It is a right side view of the portable cutting machine which concerns on 5th Embodiment. It is a top view of the portable cutting machine which concerns on 5th Embodiment. It is a rear view of the portable cutting machine which concerns on 5th Embodiment. In this figure, the tool accommodating portion is shown in FIG. 35 as a cross-sectional view taken along the line XXXVII-XXXVII. It 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 which concerns on 5th Embodiment. In this figure, the tool accommodating portion is shown in an exploded perspective view. It is an overall perspective view of the portable cutting machine which concerns on 6th Embodiment. In this figure, the tool accommodating portion is shown in an exploded perspective view. It is a right side view of the portable cutting machine which concerns on 6th Embodiment. FIG. 41 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. It is a rear view of the portable cutting machine which concerns on 6th Embodiment. In this figure, the tool accommodating portion is shown in FIG. 41 as a cross-sectional view taken along the line XLIII-XLIII.

Next, an embodiment of the present invention will be described with reference to FIGS. 1 to 43. 1 to 8 show the portable cutting machine 1 according to the first embodiment. As shown in the figure, in the present 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 the main handle 40 protruding further rearward from the rear end edge of the base 2, mainly assuming the work of cutting the material to be cut at the feet in a standing posture.

The portable cutting machine 1 includes a cutting machine main body 10 provided with a disk-shaped cutting tool 25 called a tip saw that rotates by using an electric motor 20 as a drive source, and a base 2 that supports the cutting machine main body 10 on the upper surface side. ing. The base 2 is provided with a substantially rectangular and long window portion 2a in the front and rear. The lower side of the cutting tool 25 protrudes to the lower surface side of the base 2 through the window portion 2a. The cutting tool 25 protruding from the lower surface side of the base 2 is cut to cut the material W to be cut. A main handle 40 to be gripped by the user is provided at the rear of the cutting machine main body 10. The user is located behind the portable cutting machine 1 (on the left side of the paper in FIGS. 1 to 3 and on the right side of the paper in FIG. 4) and grips the main handle 40 on the front side (on the right side of the paper in FIGS. 1 to 3 and on the right side of the paper in FIG. 4). The cutting process can be advanced by moving it to the left side). In the figure, the direction in which the cutting process proceeds is indicated as the cutting progress direction.

In the following description, regarding the front-rear direction of the member and the configuration, the direction in which cutting proceeds is the front side, and the user side is the rear side. In addition, the left-right direction of the member and the configuration is used with reference to the user. As shown in FIGS. 2 to 4, the front intersection of the cutting edge of the cutting tool 25 and the lower surface of the base 2 is the portion (cutting portion C) to be cut first with respect to the material W to be cut. The 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 a range of substantially half the upper side of the cutting tool 25. The cutting machine main body 10 is supported on the upper surface of the base 2 in a state where it can swing up and down via a vertical swing support shaft 12 provided at the front portion of the fixed cover 11. Vertical swing By swinging the cutting machine main body 10 up and down around the support shaft 12, the amount of protrusion of the cutting tool 25 to the lower surface side of the base 2 can be changed, whereby the material to be cut of the cutting tool 25 can be changed. The depth of cut with respect to W can be adjusted.

The cutting machine main body 10 is coupled to the front inclined support portion 4 provided on the upper surface of the base 2 via the vertical swing support shaft 12. The front tilted support portion 4 includes an angular plate 4a fixed to the upper surface of the base 2 in an upright state, and a tilt bracket supported on the rear surface side of the angular plate 4a so as to be tiltable to the left and right via the front left and right tilted support shafts 5. It is equipped with 4b. The front support portion 10a of the cutting machine main body 10 is supported by the tilt bracket 4b via the vertical swing 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, the fixing screw 4f in which the fixing lever 4c is screwed via the fixing nut 4h is inserted into the arc-shaped guide groove 4g of the angular plate 4a. The fixing nut 4h is tightened to the fixing screw 4f by the tilting operation of the fixing lever 4c, and the tilting bracket 4b is fixed to the angular plate 4a. By fixing the tilt bracket 4b, the left-right tilt position of the cutting machine main body 10 is fixed.

As shown in FIG. 4, a rear inclined support portion 6 is provided between the rear portion of the fixed cover 11 and the rear portion of the base 2. The rear tilted support portion 6 is supported by the base bracket 6a so as to be tilted left and right with respect to the base 2 via the rear left and right tilted support shaft 7, and the rear tilted support portion 6 via the front-rear rotation shaft 6c with respect to the base bracket 6a. It is equipped with a depth guide 6b that is supported so as to be swingable back and forth.

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

The depth guide 6b has the function of an arc-shaped guide member that guides the vertical swinging motion of the cutting machine main body 10. By tightening the main body fixing screw 6e via the fixing lever 6f to the handle support portion 13 integrally provided on the fixed cover 11, the vertical swing position of the cutting machine main body 10 is fixed to the depth guide 6b. .. As a result, the amount of protrusion of the cutting tool 25 toward the lower surface side of the base 2 is fixed, and the cutting depth of the cutting tool 25 with respect to the material W to be cut is fixed. The main body fixing screw 6e can be tightened or loosened by swinging the fixing lever 6f up and down.

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 cutting tool 25 is displayed on the side portion of the fixed cover 11. Since the cutting tool 25 rotates clockwise in FIG. 4, the cutting powder is blown upward from the cutting portion C. The blown-up cutting powder is collected in the fixed cover 11 by the cutting wind generated by the rotation of the cutting tool 25.

As shown in FIGS. 1, 3, 5 and 6, a dust collecting duct 8 is provided on the front portion and the right side portion of the fixed cover 11. In the figure, the dust collecting duct 8 is closed by the cap 9. Although omitted in the figure, the dust collecting hose can be connected to the dust collecting duct 8 by removing the cap 9. A dust collector can be connected to the dust collection duct 8 via a dust collection hose. The dust collector can efficiently collect the generated cut powder. A dust bag (dust collection bag) can be connected to the dust collection duct 8 instead of the dust collection hose. A clean working environment can be maintained by collecting dust with a dust collector or a dust bag.

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

The cap 9 removed from the dust collecting duct 8 can be held by the front inclined support portion 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 collecting duct 8 can be held by the rear inclined support portion 6 instead of the front inclined support portion 4. The cap 9 is held by elastically fitting the fixing nut 6g screwed into the main body fixing screw 6e into the engaging recess 9c.

The engaging recess 9c of the cap 9 is provided with a diameter and a depth into which the fixing nut 4h of the front inclined support portion 4 and the fixing nut 6 g of the rear inclined support portion 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 engaging recess 9c. In each figure except FIG. 17, the cap 9 removed from the dust collecting duct 8 and held by the front inclined support portion 4 or the rear inclined support portion 6 is shown by a two-dot chain line. The cap 9 attached to the dust collecting duct 8 is shown by a solid line. The cap 9 can be attached to the dust collecting duct 8 or held by the fixing nuts 4h and 6g of either the front inclined support portion 4 or the rear inclined support portion 6. As a result, the handleability of the cap 9 removed from the dust collecting duct 8 is improved. Therefore, it is possible to prevent troubles such as loss of the cap 9.

The lower half circumference of the cutting tool 25 is covered with the movable cover 14. The movable cover 14 is supported so as to be openable and closable around the vicinity of 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 spring-forced in the closing direction by a tension spring. When the movable cover 14 is closed by the spring-forced force, the movable cover 14 covers the lower half circumference of the cutting tool 25. An opening / closing lever 14a is provided at the rear of the movable cover 14. The user can grasp the opening / closing lever 14a and forcibly open / close the movable cover 14 by manual operation. In normal cutting work, as shown in FIGS. 2 to 4, the front end of the movable cover 14 is in contact with the end of the material W to be cut, and the portable cutting machine 1 is moved to the front side in the contacted state. The movable cover 14 is gradually opened against the spring-forced force.

As shown in FIG. 5, the electric motor 20 is attached to the right side portion of the fixed cover 11 via the reduction gear portion 15. The electric motor 20 is attached in a lateral posture in which the motor axis J is orthogonal to the surface direction of the cutting tool 25. The reduction gear portion 15 has a configuration in which a reduction gear train is housed in a gear housing 15a integrally provided on the right side portion of the fixed cover 11. The rotational output of the electric motor 20 is decelerated by the reduction gear unit 15 and transmitted to the spindle. The fixed cover 11 and the gear housing 15a are integrally formed by die-casting magnesium. A motor housing 21 made of die-cast aluminum is coupled to the gear housing 15a. The electric motor 20 is housed in a cylindrical motor housing 21.

As the electric motor 20, a brushless motor in which a rotor is rotatably supported on the inner peripheral side of a cylindrical stator is used. The electric motor 20 is made compact in the axial direction (left-right direction) by the amount that the rotor does not require the arrangement of the commutator and the brush, for example. A cooling fan is attached to the motor shaft that supports the rotor.

As shown in FIGS. 1 to 3, a plurality of intake holes 21a are provided on the left end surface of the motor housing 21. 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 to the output side in the motor axis J direction, and the stator and rotor are cooled in the process.

The spindle 17, which is the output shaft of the reduction gear portion 15, is projected from the inside of the gear housing 15a into the fixed cover 11. 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 cutting tool 25 is sandwiched between the outer flange 25a and the inner flange 25b in the direction perpendicular to the surface, and the sandwiched state is locked by the cutting tool fixing screw 25c tightened to the tip surface of the spindle 17, thereby causing the spindle. It is fixed so that it cannot be displaced in the axial direction and cannot rotate around the axis with respect to 17. A hexagon bolt is used for the cutting tool fixing screw 25c.

As shown in FIGS. 2, 3 and 5, the spindle lock lever 18 is provided in a state of protruding forward near the joint portion between the gear housing 15a and the motor housing 21. 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 as not to rotate. By locking the spindle 17, it is convenient to loosen or tighten the cutting tool fixing screw 25c.

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

The control board of the controller 33 is equipped with a control circuit that transmits a control signal based on the position information of the rotor detected by the sensor board of the electric motor 20. Further, the control board is equipped with a drive circuit that switches the current of the electric motor 20 based on the control signal received from the control circuit. Further, the control board has an auto stop circuit that cuts off the power supply to the electric motor 20 so as not to be in an over-discharged or over-current state according to the detection result of the state of the battery pack attached to the battery mounting unit 30 described below. It is installed.

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

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

One battery pack is attached between the front wall portion 34 and the rear wall portion 35. The front and rear of the attached battery pack are covered with the front wall portion 34 and the rear wall portion 35 to protect the battery pack. As shown in FIGS. 1 to 3, the terminal block 36 is arranged at the left end portion of the battery mounting portion 30 in the inner portion between the front wall portion 34 and the rear wall portion 35. A pair of rail receiving portions 36a and positive and negative power supply 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 up and down in parallel with each other at the front portion and the rear portion of the terminal block 36. Positive and negative power supply terminals 36b and 36c are arranged between the front and rear rail receiving portions 36a. The positive and negative power supply terminals 36b and 36c extend vertically at regular intervals in the front-rear direction. A lock recess 36d for locking the attached state of the battery pack is provided on the upper portion of the terminal block 36. By engaging the lock claw of the battery pack 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 removing it from the battery mounting portion 30 and charging it with a separately prepared charger. The battery pack is a versatile battery pack that can be reused as a power source for other power tools.

A D-shaped main handle 40 is provided behind the battery mounting portion 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 portion of the battery mounting portion 30. The main handle 40 projects further rearward than the rear end portion of the base 2. As shown in FIGS. 5 to 8, the cutting tool 25 is arranged so as to be offset to the left side with respect to the main handle 40.

The rear portion of the main handle 40, which extends in the vertical direction, is the grip portion 41 gripped by the user. A trigger type switch lever 42 is provided on the upper part of the grip portion 41. When the switch lever 42 is pulled 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 for preventing 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 lock state of the off position of the switch lever 42 is released and the pull operation becomes possible. When the pulling operation of the switch lever 42 is released, the lock-off state is automatically restored. This prevents an unintended and careless pulling operation of the switch lever 42. The lock-off button 43 is arranged on both the left and right sides of the main handle 40. When any one of the lock-off buttons 43 is pressed, the lock-off state of the switch lever 42 is released.

The handle support portion 13 described above is integrally provided on 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 integrally formed with the fixed cover 11 in the present embodiment. The handle support portion 13 is provided so as to project rearward from the rear portion of the fixed cover 11. The handle support portion 13 projects in parallel along the surface direction of the cutting tool 25. The battery mounting portion 30 and the main handle 40 are coupled to the handle support portion 13.

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

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

The portions of the spring pin 53 protruding on both sides in the radial direction of the base shaft portion 51a are removably entered into the positioning recess 52a provided at the end of the support portion 52. The positioning recess 52a is provided at a quadrant position (use position and storage position) in the circumferential direction. A regulation convex portion 52b is provided between the positioning recesses 52a adjacent to each other in the circumferential direction. The regulation convex portions 52b are provided at two locations facing each other in the circumferential direction. The regulation convex portion 52b is formed high in the axial direction. Therefore, the end portions of the spring pins 53 protruding on both sides in the radial direction can be displaced in the circumferential direction between the two facing regulation convex portions 52b. As a result, the rotation range around the axis of the base shaft portion 51a is restricted to a range of about 90 °. As a result, the use position and the storage position are defined so as to form an angle of about 90 ° with each other.

A sleeve 51e is attached to the opposite side (connecting portion 51b side) of the base shaft portion 51a. The sleeve 51e is restricted from being displaced toward the connecting portion 51b by the protrusion 51d. A compression spring 54 is interposed between the engaging portion 52f provided so as to project on the inner peripheral side of the support portion 52 and the sleeve 51e. The base shaft portion 51a is urged in the axial direction by the compression spring 54. As a result, both ends of the spring pin 53 are urged in the direction of entering the positioning recess 52a.

The support portion 52 is provided with a joint portion 52c so as to project downward. A positioning convex portion 52d is integrally provided on the left side portion of the connecting portion 52c. The coupling portion 52c is coupled to the right side portion of the pedestal portion 37 with two fixing screws in a state where the positioning convex portion 52d is unevenly fitted to the positioning concave portion provided on the right side portion of the pedestal portion 37. In the figure, an insertion hole 52e into which two fixing screws are inserted is shown, and the illustration of the fixing screws is omitted.

According to the above-exemplified hook 50, the hook main body 51 can be rotated around the axis of the base shaft portion 51a and moved to the upper use position and the lower storage position. In FIG. 14, the hook main body 51 at the use position is shown by a two-dot chain line, and the hook main body 51 at the storage position is shown by a solid line. When the hook body 51 is taken out to the used position, the hooking portion 51c is projected to the right. Thereby, for example, the stepladder of the stepladder can be positioned between the base shaft portion 51a and the hooking portion 51c, and the portable cutting machine 1 can be suspended. On the inner peripheral side of the hooking portion 51c of the hook main body 51, a protruding portion 51f for preventing a positional deviation with respect to the hooking portion (stepladder step) is provided.

The used position and the stored position of the hook main body 51 are held by elastically fitting the end portion of the spring pin 53 into the positioning recess 52a by the urging force of the compression spring 54. By rotating the hook body 51 around the axis of the base shaft portion 51a against the urging force of the compression spring 54, the user can take it out to the use position and store it in the storage position. The hook main body 51 is restricted to a range of about 90 ° between the use position and the storage position by the regulation convex portion 52b. Therefore, the hook main body 51 is not displaced upward from the used position and is not displaced further to the left from the storage position along the pedestal portion 37.

The pedestal portion 37 has a stepped shape having different heights in the left-right direction. The hook 50 is attached to a higher portion 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 arranged in a portion deeper in the left-right direction. The adapter accommodating portion 46 contains a communication adapter 47 for short-range wireless communication. The communication adapter 47 enables short-range wireless communication between the portable cutting machine 1 and another wireless device. By short-range wireless communication, the dust collector connected to the dust collecting duct 8 via the dust collecting hose is started and stopped in conjunction with the start / stop operation of the portable cutting machine 1. With this wireless communication function, the worker can efficiently continue the cutting work while maintaining a clean working environment. The communication adapter 47 can be removed from the adapter accommodating portion 46. The removed communication adapter 47 can be diverted to another compatible power tool.

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

For example, the user can grip the grip portion 45a with his right hand and grip the grip portion 41 of the main handle 40 with his left hand to move the portable cutting machine 1. The grip portion 45a is parallel to the base 2 and is inclined in a direction of being displaced forward toward the left side when viewed in a plane. Due to this inclination, the grip portion 45a can 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 / loosening work in which a hexagon bolt is tightened and fixed, and conversely loosened and removed. In the first embodiment, a box wrench is exemplified as the tightening tool 61. Generally, a box wrench is a rod-shaped hand-held tool that is easy to grip and has a hexagonal or polygonal engaging hole that engages with the outer peripheral side of the hexagonal head of a hexagon bolt at one end or both ends. As shown in FIG. 21, the tightening tool 61 has a strip shape having 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. An engaging hole 61a is provided in one hexagon in the flat portion 61c short in the longitudinal direction. One auxiliary hole 61e is provided at the end of the flat portion 61b long in the longitudinal direction. A hook can be hooked on the auxiliary hole 61e when the tool is taken out from the tool accommodating portion 60 to suspend the tightening tool 61.

The tightening tool 61 is used for tightening / loosening work in which the cutting tool fixing screw 25c is loosened and removed when the cutting tool is replaced, and then tightened and fixed in reverse. The hexagonal head of the cutting tool fixing screw 25c is positioned in the engaging hole 61a, and the long flat portion 61b side is gripped and rotated with the engaging hole 61a engaged with the outer peripheral side of the hexagonal head. By doing so, the cutting tool fixing screw 25c is loosened and tightened. A box wrench having hexagonal or polygonal engaging holes on both sides can also be applied to the tightening tool 61.

The details of the tool accommodating portion 60 are shown in FIGS. 3, 9 and 10. The tool accommodating portion 60 is a thin plate-shaped tubular space portion capable of accommodating the tightening tool 61, and is provided long in the front-rear direction along the lower surface of the main handle 40. The tool accommodating portion 60 is opened rearward. The rear opening corresponds to the entrance 60a for allowing the tightening tool 61 to enter. The entrance 60a corresponds to the rear end portion of the tool accommodating portion 60. In the present embodiment, the side opening portion 60b is provided at the entrance 60a. As shown in FIG. 9, the entire tightening tool 61 is housed in the inner part of the entrance 60a. In the present embodiment, the side opening portion 60b is formed by largely missing the lower part and the left and right sides (direction orthogonal to the removal direction) to the front except the upper part of the tightening tool 61. In FIG. 9, the tool accommodating portion 60 (entrance entrance 60a) when the side opening portion 60 is not provided is shown by a two-dot chain line. Therefore, the entrance 60a of the tool accommodating portion 60 is shown in a state of being located behind the rear end portion of the tightening tool 61.

The tightening tool 61 in the housed state is exposed to the side through the side opening portions 60b on the lower side and the left and right sides. The user can bring the fingertip directly into contact with the exposed portion. As a result, 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, the short flat portion 61c and the bent portion 61d are projected from the side opening portion 60b of the tool accommodating portion 60. As a result, a region (more accurately, 63%) exceeding approximately 60% in the longitudinal direction of the tightening tool 61 is accommodated in the tool accommodating portion 60. The user can grip and remove less than 40 percent (more accurately 37 percent) of the area protruding from the opening of the tool housing 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 inadvertently slipping out.

Further, as shown in FIGS. 9 and 10, an elastic pressing portion 60c displaced one step inward in the plate thickness direction is provided on the lower surface of the inner portion (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 lower surface of the front portion 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 inadvertently slipping out.

According to the portable cutting machine 1 according to the first embodiment described above, for example, when the cutting machine main body 10 is displaced upward in order to reduce the cutting depth of the cutting tool 25, it is housed in the tool accommodating portion 60. The tightening tool 61 is displaced integrally with the cutting machine main body. For this reason, the tightening tool is less likely to interfere with the work as in the case where the conventional tightening tool protrudes laterally from the base and is held.

The entrance 60a of the tool accommodating portion 60 is provided with a side opening portion 60b that exposes the lower side and the left and right sides of the tightening tool 61. The user can directly bring the fingertip into contact with the tightening tool 61 via the side opening portion 60b. As a result, 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. As a result, a commercially available tightening tool 61 can be accommodated in the tool accommodating portion 60 without the need for a notch unlike a conventional dedicated wrench. Therefore, the versatility of the tool accommodating portion 60 is increased.

Further, the tool accommodating portion 60 is arranged below the main handle 40. As a result, the protruding portion (short flat portion 61c and bent portion 61d) of the tightening tool 61 inserted into the tool accommodating portion 60 protrudes from the opening of the tool accommodating portion 60 along the lower surface of the main handle 40. Therefore, since the protruding portion of the tightening tool 61 is hidden under the main handle 40 and guarded, the protruding portion is less likely to be an obstacle.

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

The front handle 66 is provided with legs 45b and 45c at both left and right ends of the grip portion 67. The left and right legs 45b and 45c are connected to the right side of the fixing cover 11 and the motor housing 21 by the 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. The opening 65a on the right side of the tool accommodating portion 65 is formed slightly wider than the opening 65b on the left side. In the second embodiment, the tightening tool 61 enters through the opening 65a on the right side of the tool accommodating portion 65 and is taken out in reverse.

In FIGS. 22 and 23, the entrance 65e of the tool accommodating portion 65 is shown by a two-dot chain line. The upper wall portion and the front and rear wall portions are missing from the entire circumference of the entrance 65e, and an opening 65a is provided. The opening 65a corresponds to the side opening. A part around the entrance 65e (the right end of the tool accommodating portion 65) is cut off to provide an opening 65a, so that the front and rear edges of the accommodating tightening tool 61 are exposed forward and backward, and the upper surface is exposed. It is exposed upward. As a result, the user can easily take out the tightening tool 61 by directly bringing the fingertip into contact with the portion exposed to the opening 65a.

As shown in FIG. 23, one leaf spring 68 is attached in the vicinity of the opening 65b on the left side of the tool accommodating portion 65. When the tightening tool 61 is housed in the tool accommodating portion 65, the leaf spring 68 is elastically engaged with the auxiliary hole 61e of the tightening tool 61. As a result, rattling of the tightening tool 61 is prevented, and careless pulling out is prevented.

As shown in FIGS. 22 and 23, a pair of front and rear pedestal portions 65c are provided in the tool accommodating portion 65. The pedestal portion 65c is provided from slightly behind the opening 65a on the right side to the vicinity of the opening 65b on the left side. Both sides of the tightening tool 61 in the width direction are received from below by the front and rear pedestal portions 65c. Therefore, the tightening tool 61 is elastically pressed against the pedestal portion 65c by the leaf spring 68 and held. Further, the bent portion 61d is in contact with the bottom portion 65d of the tool accommodating portion 65.

According to the tool accommodating portion 65 according to the second embodiment, the dead space of the front handle 66 can be effectively utilized to accommodate the tightening tool 61 so as not to get in the way.

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

A pedestal portion 40c is integrally provided on the right side portion of the right housing 40b of the handle housing 40a. The pedestal portion 40c is provided so as to project to the right side. The accommodating cover 71 is coupled along the upper surface of the pedestal portion 40c. FIG. 28 shows the accommodation cover 71 as a single unit. 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 molded with the top plate portion 71a by making a U-shaped notch at the time of molding.

A convex portion 71d for positioning is integrally provided on the left edge portion of the top plate portion 71a. The accommodation cover 71 is fixed to the pedestal portion 40c in a state where the convex portion 71d for positioning is inserted into the positioning hole 40d of the right housing 40b and positioned. The accommodation cover 71 is attached by connecting the side wall portion 71b to the right side portion 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 portion of the cradle portion 40c corresponds to the entrance 70a of the tool accommodating portion 70. The front-rear length of the accommodation cover 71 is smaller than the front-rear length of the pedestal portion 40c. As a result, even in the third embodiment, the upper portion (upper wall portion) and the right side portion (right wall portion) are omitted from the entire circumference of the entrance 70a, and the side opening portion 70b is formed. The accommodated tightening tool 61 is exposed upward and to the right by the side opening portion 70b.

In the third embodiment, the tightening tool 61 is taken in and out from the rear opening 71f (rear end portion of the accommodation cover 71) provided so that the entrance 70a of the tool accommodating portion 70 is missing. When the tightening tool 61 is accommodated as shown in FIG. 27, almost the entire long flat portion 61b is accommodated below the accommodating cover 71. The short flat portion 61c and the bent portion 61d of the tightening tool 61 are accommodated in a state of protruding from the opening 71f. The user can grip the protruding portion of the tightening tool 61 as a gripping portion by directly contacting the fingertip with the upper surface or the right side portion exposed to the side opening portion 70b. The user can grasp the protruding portion, accommodate it in the tool accommodating portion 70, and conversely pull it out from the tool accommodating portion 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. As a result, rattling of the tightening tool 61 in the tool accommodating portion 70 is prevented, and careless removal from the tool accommodating portion 70 is prevented.

On the rear side of the pedestal portion 40c, a relief recess 40e for engaging the tip portion of the short flat portion 61c of the tightening tool 61 is provided. As shown in FIGS. 25 and 27, the tip end portion of the short flat portion 61c is also engaged with the edge portion of the relief recess 40e to prevent the housed tightening tool 61 from rattling and inadvertently slipping out. Further, since the short flat portion 61c can be easily picked up by the relief recess 40e in addition to the side opening portion 70b, it is possible to facilitate the storage and removal.

The tool accommodating portion 70 according to the third embodiment can also effectively utilize the dead space of the cutting machine main body 10 to accommodate the tightening tool 61 in the cutting machine main body 10. As a result, it is possible to facilitate the replacement of the cutting tool and to compactly accommodate the tightening tool 61 so as not to get in the way.

29 to 34 show the tool accommodating portion 80 according to the fourth embodiment. In the tool accommodating portion 80 of the 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 accommodated. As shown in FIG. 32, the tightening tool 81 has a holder portion 81a in which a hexagonal engaging 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 cutting tool fixing screw 25c fitted in the engaging hole 81b, the cutting tool 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 accommodating portion 80 is provided below the battery mounting portion 30. The fourth embodiment is the same as the first embodiment except for the tool accommodating portion 80. For members and configurations that do not require modification, the same symbols are used and the description thereof will be omitted.

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

The holding portion 82b of the holding member 82 has elasticity and has a cylindrical shape capable of elastically sandwiching and holding the holder portion 81a of the tightening tool 81. The holder portion 81a can be pushed into the holding portion 82b, which is an elastic member, from above to elastically hold the holder portion 81a. As a result, the tightening tool 81 is accommodated in a sideways posture in which the holder portion 81a is positioned along the upper surface of the base 2. The handle portions 81c on both sides are housed along the edge 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 a plan view. Further, the tightening tool 81 is compactly housed in the gap between the battery pack attached to the battery mounting portion 30 and the base 2.

The tightening tool 81 can be removed from the tool accommodating portion 80 by lifting the holder portion 81a upward against the elastic force of the holding portion 82b. Using the removed tightening tool 81, the cutting tool fixing screw 25c can be rotated to quickly perform the cutting tool 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 by the tool accommodating portion 80 in a compact configuration mainly composed of the holding member 82. The tightening tool 81 is compactly housed in a state where 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 sandwiched by the elastic member at a portion closer to the center of gravity, it is accommodated in a stable state.

FIGS. 35 to 39 show the tool accommodating portion 85 according to the fifth embodiment. The 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 holding wall portions 86a are integrally provided on the upper surface of the base 2. The front and rear holding wall portions 86a are provided so as to extend upward from the stepped portion 2b of the base 2. The holder portion 81a is accommodated between the two front and rear holding wall portions 86a. The upper portions of the two front and rear holding wall portions 86a are bent to the right. As shown in FIG. 39, the elastic member 87 is attached to the upper bent portion 86b on the rear side. A cylindrical rubber pin is used for the elastic member 87. The elastic member 87 protrudes from the lower surface of the upper bent portion 86b. The base portion 81d of the 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. The elastic member 87 is elastically pressed against the base portion 81d of the rear handle portion 81c. This prevents the handle portion 81c and thus the tightening tool 81 from rattling and inadvertently coming off from the tool accommodating portion 85.

According to the tool accommodating portion 85 of the fifth embodiment as in the fourth embodiment, the tightening tool 81 is accommodated in a sideways posture along the upper surface of the base 2. Moreover, it is housed in a state where it does not protrude from the outer shell of the base 2 in a plan view. As a result, the tightening tool 81 is compactly housed 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 to the left side of the base 2 in a sideways posture, and the holder portion 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 accommodated in the tool accommodating portion 85. Therefore, the attachment / detachment of the tightening tool 81 to the elastic member 87 is enhanced, and the tightening tool 81 is accommodated on the base in a stable lateral posture along the base 2.

40 to 43 show the tool accommodating portion 90 according to the 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 configurations that do not require modification, the same symbols are used and the description thereof will be omitted. In the sixth embodiment, unlike the first to third embodiments, the hook 50 is omitted. The tool accommodating portion 90 according to the sixth embodiment is provided on the upper portion of the pedestal portion 37 instead of the hook 50. At the lower part of the pedestal portion 37, an adapter accommodating portion 46 to which a communication adapter 47 for short-range wireless communication is mounted is provided as in the first to fifth embodiments.

A circular accommodating recess 91 is provided on the right side of the pedestal portion 37. The holder portion 81a of the tightening tool 81 is inserted into the accommodating recess 91. A holding recess 92 is recessed below the accommodating 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. The holding member 93 has a flat plate-shaped base portion 93a and a U-shaped holding portion 93b, as in the holding member 82 according to the fourth embodiment. The base portion 93a and the holding portion 93b are integrally formed by molding. The holding member 93 is attached to the right side portion of the pedestal portion 37 in a state where the base portion 93a is fitted into the holding recess 92 and positioned. The holding member 93 is fixed by tightening the 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 shape and has a cylindrical shape capable of elastically sandwiching and holding the handle portion 81c of the tightening tool 81. While inserting the holder portion 81a into the accommodating recess 91, the handle portion 81c is pushed into the holding portion 93b, which is an elastic member, from the right side to elastically hold the handle portion 81c. As a result, the tightening tool 81 is accommodated in the tool accommodating portion 90. The tightening tool 81 is housed in a sideways posture in which the handle portion 81c is positioned along the right side portion of the pedestal portion 37. The handle portions 81c on both sides are held in a state of extending vertically along the right portion of the pedestal portion 37.

The tool accommodating portion 90 according to the sixth embodiment is provided in the cutting machine main body 10 as in the first to third embodiments. Therefore, the tightening tool 81 is integrally housed in the cutting machine main body 10. From this, 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 integrally with the cutting machine main body 10. For this reason, it is less likely to interfere with the work as in the case of the conventional configuration in which the base 2 is held so as to protrude laterally.

Further, the tool accommodating portion 90 holds the tightening tool 81 in a state of accommodating a part of the holder portion 81a and not accommodating the handle portion 81c. Therefore, the handle portion 81c can be easily gripped, and the detachability to the tool accommodating portion 90 is improved.

Further, according to the sixth embodiment, a holding member 93 for detachably holding 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 compactly housed in the cutting machine main body 10 while ensuring the 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 in a side view. Therefore, the dead space of the cutting machine main body 10 is effectively utilized, and the tightening tool 81 is compactly housed so as not to get in the way.

As described above, according to the tool accommodating portions 60, 65, 70, 80, 85, 90 according to each embodiment, the main handle 40 is arranged so as to project further rearward from the rear end of the base 2. The so-called portable cutting machine 1 is compactly housed 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 further modified and implemented. Applicable tightening tools for blade replacement are box wrench (American name: Box wrench / British name: Ring spanner) and T-type box wrench (American name: T-handle Socket wrench / British name: T-handle Socket spanner). ) Is not limited. For example, instead of a hexagonal engaging hole 61a, a spanner (American name: Open-end wrench / British name: Open-end spanner) having a bifurcated engaging portion that engages the opposite two sides of a hexagon bolt, or one end. The tool accommodating portions 60, 65, 70 according to the first to third embodiments, which are also exemplified for a combination wrench having a hexagonal hole and a bifurcated portion at the other end (American name: Combination wrench / British name: Combination spanner) can be applied. .. Further, 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 portion and the holder portion (socket) are separate and the applicable size can be exchanged is used as the tool accommodating portions 80 and 85 of the 4th to 6th embodiments. , 90 can be applied.

The case where the cutting tool fixing screw 25c is a hexagon bolt that is tightened to the female threaded portion of the spindle is exemplified, but the case where the cutting tool is a hexagon nut that is tightened to the male threaded portion of the spindle to fix the cutting tool is also illustrated as the tool accommodating portion 60, 65, 70. , 80, 85, 90 can be applied. In the present disclosure, a hex nut shall be included in the hex 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 spring-loaded may be used. Further, a magnet may be used instead of the elastic member. A tightening tool such as a tightening tool 61 can be accommodated in the tool accommodating portions 60, 65, 70 without rattling by using a holding means such as a ball plunger or a magnet, and careless removal is prevented.

As the portable cutting machine 1, the rear handle saw in which the main handle 40 protrudes greatly to the rear is exemplified, but the tool accommodating portions 60, 65, which are also exemplified in each embodiment for a normal portable circular saw having a more compact handle portion, 70, 80, 85, 90 can be applied. Further, as a portable cutting machine, the same can be applied to a cutter using a diamond wheel as a cutting tool instead of a tip saw. Further, although the DC machine using the battery pack as the power source is exemplified, the tool accommodating units 60, 65, 70, 80, 85, 90 also exemplified can be applied to the AC machine using the commercial 100V power source.

W ... Material to be cut 1 ... Portable cutting machine (rear handle saw)
2 ... Base 2a ... Window, 2b ... Step, 2c ... Recess, 2d ... Screw hole 4 ... Front tilted support 4a ... Angular plate, 4b ... Tilt bracket, 4c ... Fixed lever 4d ... Angle display, 4e ... Indicator 4, 4f ... Fixing screw, 4g ... Guide groove, 4h ... Fixing nut 5 ... Front left / right tilted support shaft 6 ... Rear tilting support 6a ... Base bracket, 6b ... Depth guide, 6c ... Front / rear rotation shaft, 6d ... Depth Scale 6e ... Main body fixing screw, 6f ... Fixing lever, 6g ... Fixing nut 7 ... Rear left / right inclined support shaft 8 ... Dust collection duct 9 ... Cap 9a ... Flange part, 9b ... Cylindrical part, 9c ... Engagement recess 10 ... Cutting Machine body 10a ... Front support 11 ... Fixed cover 11a ... White arrow (rotation direction of cutting tool)
12 ... Vertical swing support shaft 13 ... Handle support 13a ... Indicator 14 ... Movable cover, 14a ... Open / close lever 15 ... Reduction gear portion 15a ... Gear housing 17 ... Spindle 18 ... Spindle lock lever 20 ... Electric motor 21 ... Motor housing 21a ... Intake hole J ... Motor axis 25 ... Cutting tool 25a ... Outer flange, 25b ... Inner flange, 25c ... Cutting tool fixing screw C ... Cutting part 30 ... Battery mounting portion (first embodiment)
32 ... Controller housing 33 ... Controller 34 ... Front wall 35 ... Rear wall 36 ... Terminal block 36a ... Rail receiving part, 36b ... Power supply terminal (positive), 36c ... Power supply terminal (negative)
36d ... lock recess, 36e ... signal terminal 37 ... pedestal 40 ... main handle 40a ... handle housing, 40b ... right housing, 40c ... pedestal, 40d ... positioning hole 40e ... relief recess 41 ... grip 42 ... switch lever 43 ... Lock-off button 45 ... Front handle 45a ... Grip part, 45b, 45c ... Leg part, 45d ... Fixing screw 46 ... Adapter accommodating part 47 ... Communication adapter 50 ... Hook 51 ... Hook body 51a ... Base shaft part, 51b ... Connecting part, 51c ... Hooking portion, 51d ... Protruding portion 51e ... Sleeve, 51f ... Protruding portion 52 ... Supporting portion 52a ... Positioning concave portion, 52b ... Regulatory convex portion, 52c ... Coupling portion, 52d ... Positioning convex portion 52e ... Insertion hole, 52f ... Engagement portion 53 ... Spring pin 54 ... Compression spring 60 ... Tool accommodating portion (first embodiment)
60a ... Entrance, 60b ... Side opening 61 ... Tightening tool (glass wrench)
61a ... engaging hole, 61b ... long flat portion, 61c ... short flat portion, 61d ... bent portion, 61e ... auxiliary hole 62 ... elastic member (rubber pin)
65 ... Tool accommodating portion (second embodiment)
65a ... opening (right side), 65b ... opening (left side), 65c ... pedestal part, 65d ... bottom 65e ... entrance 66 ... front handle 67 ... gripping part 68 ... leaf spring 70 ... tool accommodating part (third embodiment)
70a ... Entrance, 70b ... Side opening 71 ... Storage cover 71a ... Top plate, 71b ... Side wall, 71c ... Spring, 71d ... Convex, 71e ... Fixing screw 71f ... Opening 80 ... Tool housing (No. 1) 4 Embodiment)
81 ... Tightening tool (box wrench)
81a ... Holder part, 81b ... Engagement hole, 81c ... Handle part, 81d ... Base part 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 portion, 86b ... Upper bent portion 87 ... Elastic member 90 ... Tool accommodating portion (sixth embodiment)
91 ... Accommodating recess 92 ... Holding recess 92a ... Screw hole 93 ... Holding member 93a ... Base portion, 93b ... Holding portion, 93c ... Insertion hole 94 ... Fixing screw

Claims (12)

It ’s a portable cutting machine,
A cutting machine body equipped with an electric motor that rotates a disk-shaped cutting tool,
A tightening tool that engages with the outer circumference of the hexagon bolt when tightening the hexagon bolt,
It has a tool accommodating portion formed in the cutting machine main body for detachably accommodating the tightening tool and projecting a part of the tightening tool.
The tool accommodating portion has a tubular shape extending in the removal direction of the tightening tool, and is cut out at the entrance of the tool accommodating portion so that the tightening tool is exposed in a direction orthogonal to the removal direction. A portable cutting machine with a side opening. The portable cutting machine according to claim 1.
A portable cutting machine provided in the tool accommodating portion and having an elastic member that elastically presses the tightening tool in a direction orthogonal to the removal direction. The portable cutting machine according to claim 1 or 2.
It has a handle that extends from the cutting machine body and has a handle.
A part of the tightening tool inserted into the tool accommodating portion protrudes rearward from the tool accommodating portion along the lower surface of the handle, and the entire tightening tool is accommodated in front of the rear end of the handle. A portable cutting machine in which the tool accommodating portion is formed in the cutting machine main body. It ’s a portable cutting machine,
The base that comes into contact with the material to be cut,
A cutting machine main body supported by the base and equipped with an electric motor for rotating a disk-shaped cutting tool.
With a box wrench that tightens hexagon bolts,
A portable cutting machine having an elastic member that elastically holds the box wrench to the base or the cutting machine body in a removable manner. The portable cutting machine according to claim 4.
A portable cutting machine in which the elastic member is provided on the base so as to hold the box wrench on the upper surface of the base. The portable cutting machine according to claim 5.
The box wrench has a holder portion having an engaging hole formed to be engaged with the hexagon bolt, and a handle portion extending laterally from the holder portion, and the holder portion is held by the elastic member. For cutting machine. The portable cutting machine according to claim 5.
The box wrench has a holder portion formed with an engagement hole to be engaged with the hexagon bolt, and a handle portion extending laterally from the holder portion.
A portable cutting machine in which an accommodating portion for accommodating the handle portion is formed on the base when the holder portion is moved along the base. The portable cutting machine according to claim 4.
A portable cutting machine in which a tool accommodating portion for accommodating the box wrench is formed in the cutting machine main body. The portable cutting machine according to claim 8.
The box wrench has a holder portion formed with an engagement hole to be engaged with the hexagon bolt, and a handle portion extending laterally from the holder portion.
The tool accommodating portion is a portable cutting machine that accommodates a part of the holder portion and holds the box wrench without accommodating the handle portion. The portable cutting machine according to claim 9.
A portable cutting machine in which the elastic member that detachably holds the base of the handle portion of the box wrench is provided in the cutting machine main body. The portable cutting machine according to claim 8.
It has a handle that extends from the cutting machine body and has a handle.
A portable cutting machine in which the tool accommodating portion is arranged between the electric motor and the handle in the cutting machine main body. The portable cutting machine according to any one of claims 1 to 11.
A portable cutting machine having a handle arranged behind the rear end of the base from the cutting machine main body.

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