JP7166792B2 - portable cutting machine - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable cutting machine that is carried by an operator and moves for cutting.

The following patent document discloses a technique of providing a hook for hooking this type of cutting machine to another part when not in use. Patent Document 1 discloses a configuration in which a hook is provided on the side of an electric motor as a drive source, and Patent Document 2 discloses a configuration in which a hook is provided on the side of a handle held by a user. ing. The hook can be hooked, for example, on a scaffolding, a handrail, or the like in a workshop to suspend the cutting machine.

JP 2006-326753 A JP 2015-178154 A

However, with regard to the above conventional hooks, it is necessary to further improve usability such as operability during suspension and compactness when not in use.

SUMMARY OF THE INVENTION An object of the present invention is to further improve the usability of a hook for hanging a cutting machine from another part.

The above problems are solved by the following inventions. A first invention is a portable cutting machine that cuts a material to be cut by cutting a cutting tool driven by an electric motor. In the first invention, a hook for suspension is provided in front of a fixed cover that covers the periphery of the cutting tool.

According to the first invention, since the hook is provided in front of the fixed cover, it becomes easy to hook the hook to another part by moving the portable cutting machine while holding the handle portion during work. , the usability of the hook can be further improved. As for the position where the hook is provided, in addition to the structure in which the hook is provided in the front part of the fixed cover, the structure in which the hook is provided in the front part of the fixed cover in the direction of cutting progress is included. .

A second invention according to the first invention is provided with a base that abuts on the cutting material on the lower surface side, and a cutter body supported on the upper surface side of the base, and the cutter body includes an electric motor and a cutting tool. 2. This is a portable cutting machine in which a cutting tool protrudes from the lower surface of a base and cuts into a material to be cut. In the second invention, the cutting machine body is supported on the upper surface side of the base via the vertical swing support portion in the front part so as to be able to swing vertically, and the amount of protrusion of the cutting tool to the lower surface side of the base is changed. A hook is provided in the vicinity of the vertical swing support portion.

According to the second aspect of the invention, since the hook is provided in the vicinity of the vertical swing support portion of the front portion, the hook can be easily hooked to other parts, and in this respect, the usability of the hook can be further improved.

A third aspect of the present invention is the portable cutter according to the second aspect, wherein the front portion of the cutter body is provided with a support arm for the vertically swinging support portion, and a hook is provided on the upper surface of the support arm.

According to the third invention, the hook can be provided by effectively utilizing the empty space on the upper surface side of the support arm, and in this respect, the compactness of the hook can be enhanced.

A fourth invention is the portable cutting machine according to the third invention, wherein the position of the hook is changeable, and the range in which the position of the hook is changeable is restricted to the upper surface side of the base.

According to the fourth invention, the hook is prevented from interfering with the material to be cut or the cutting tool, so that the workability of the portable cutting machine is not impaired.

A fifth aspect of the present invention is the portable cutting machine according to the fourth aspect, wherein the hook is rotated about the left-right horizontal axis to change its position in the front-rear direction.

According to the fifth aspect of the invention, the hook can be rotated about the left-right horizontal axis, for example, taken out to the use position on the front side, and conversely stored in the storage position on the rear side. can do.

A sixth aspect of the present invention is a portable cutting machine according to the fourth aspect, wherein the hook is configured to be able to change its position left and right by rotating it around a vertical axis in a tangential direction to the peripheral edge of the fixed cover.

According to the sixth invention, the hook can be rotated around the vertical axis so that it can be taken out, for example, to the use position on the right side and stored in the storage position on the left side. be able to.

A seventh aspect of the invention is a portable cutting machine that cuts a material to be cut by cutting a cutting tool driven by an electric motor. In the seventh invention, a hanging hook is provided in front of the fixed cover that covers the cutting tool. In the seventh invention, the hook can be rotated about a vertical vertical axis in a tangential direction to the peripheral edge of the fixed cover to change its position left and right, and can be displaced in a vertical vertical axis direction to change its position up and down. It's becoming

According to the seventh invention, the hook can also be displaced in the direction of the vertical axis so that it can be taken out, for example, to the upper use position and conversely stored in the lower storage position. can do better.

In an eighth aspect based on the seventh aspect, the hook can be taken out to the use position by changing its position upward in the vertical axis direction, and can be stored in the storage position by changing its position downward in the vertical axis direction. It is a portable cutting machine.

According to the eighth invention, by setting the upper side in the vertical axis direction as the use position, the position where the hook can be easily hooked to other parts can be set as the use position of the hook, and the lower side in the vertical axis direction can be set as the storage position. By doing so, the hook can be stored compactly.

A ninth aspect of the invention is a portable cutting machine that cuts a material to be cut by cutting a cutting tool driven by an electric motor. A portable cutting machine according to a ninth aspect of the invention comprises a handle portion that is held by a user. In the ninth invention, the side portion of the handle portion opposite to the cutting tool is provided with a hook for suspension. The hook includes a support portion extending forward and a hook bar having a hook portion extending backward from the front side of the support portion by folding back.

According to the ninth aspect of the invention, since the hook bar is provided in a state extending forward from the side of the handle portion, the hook bar can be placed on a scaffold or on a workbench without intentionally changing hands while holding the posture during work. The portable cutting machine can be hung by hooking on the end part, and in this respect, the hanging property (handleability at the time of hanging) of the hook can be enhanced.

A tenth aspect of the present invention is a portable cutting machine that cuts a material to be cut by cutting a cutting tool driven by an electric motor. A portable cutting machine according to a tenth aspect of the invention has a hook for hanging on the front part of the electric motor. The hook includes a hook bar having an upwardly extending supporting portion and a hooking portion extending downwardly from the upper side of the supporting portion.

According to the tenth invention, since the hook bar is provided in a state of extending upward from the front part of the electric motor, the hook bar can be placed on a scaffold or a workbench without intentionally changing the holding posture while working. The portable cutting machine can be hung by hooking on the end, and in this respect, the hanging property of the hook can be enhanced.

An eleventh aspect of the invention is a portable cutting machine that cuts a material to be cut by cutting a cutting tool driven by an electric motor. A portable cutting machine according to an eleventh aspect of the invention has a hook for hanging above the electric motor. The hook includes a hook bar having a support portion extending obliquely downward forward and a hook portion extending obliquely upward rearward from the front side of the support portion.

According to the eleventh aspect of the invention, since the hook bar is provided in a state in which it extends obliquely forward and downward from the upper portion of the electric motor, it is possible to move the hook bar to the end of the scaffold or workbench without intentionally changing the gripping posture during work. The portable cutting machine can be hung by hooking on the part, and in this respect, the hanging property of the hook can be enhanced.

A twelfth aspect of the invention is a portable cutting machine that cuts a material to be cut by cutting a cutting tool driven by an electric motor. A portable cutting machine according to a twelfth aspect of the present invention has a handle portion to be gripped by a user, and a hook for hanging at the rear portion of the handle portion. The hook includes a hook bar having a supporting portion extending in a direction away from the cutting tool and a hook portion extending in a direction approaching the cutting tool by folding back from the tip side of the supporting portion.

According to the twelfth invention, since the hook bar is provided at the rear part of the handle part, when the hook bar is hung at a relatively low position, the hook bar can be placed on a scaffold or workbench without intentionally changing the holding posture while working. The portable cutting machine can be hung by hooking on the end of the hook, and in this respect, the hanging property of the hook can be enhanced.

A thirteenth aspect of the invention is a portable cutting machine that cuts a material to be cut by cutting a cutting tool driven by an electric motor. A portable cutting machine according to a thirteenth invention has a hook bar for suspension. The hook bar has a J-shape having a support portion, an intermediate portion and a hook portion, the center of gravity of the portable cutting machine is positioned on a virtual plane including the support portion, the intermediate portion and the hook portion, and The position in which the hooking portion extends toward the center of gravity is the use position of the hook bar.

According to the thirteenth aspect of the invention, since the hooking portion of the hook bar extends toward the center of gravity, if a suitable hooking target portion (for example, a horizontal column, etc.) to be positioned between the support portion and the hooking portion is found, If not, the portable cutting machine can be suspended by hooking the hook bar while the tip of the hooking part is in contact with the upper surface of the workbench or the like. Also in this case, since the center of gravity of the portable cutting machine is positioned vertically below the abutting portion of the workbench, the portable cutting machine can be suspended in a stable posture.

Fig. 2 is a right side view of the portable cutting machine according to the first embodiment; It is the front view which looked at the portable cutting machine which concerns on 1st Embodiment from the arrow (II) direction in FIG. 1. It is the top view which looked at the portable cutting machine which concerns on 1st Embodiment from the arrow (III) direction in FIG. Fig. 3 is a left side view of the portable cutting machine according to the first embodiment, viewed from the direction of arrow (IV) in Fig. 2; This figure shows a state in which the hook is retracted to the retracted position. It is a left view of the portable cutting machine which concerns on 1st Embodiment. This figure shows a state in which the hook is taken out to the use position. It is a left view of the portable cutting machine which concerns on 1st Embodiment. This figure shows a state in which the left side of the left and right half-structured handle housing is removed. FIG. 7 is a cross-sectional view of the portable cutting machine according to the first embodiment taken along the line (VII)-(VII) in FIG. 6; FIG. 7 is a cross-sectional view along line (VIII)-(VIII) in FIG. 6 of the portable cutting machine according to the first embodiment; It is a left side view of a handle|steering-wheel part. This figure shows a state in which the left side of the left and right half-structured handle housing is removed. This figure shows a normal state in which the connection part of the suspension part is not damaged. It is a left side view of a handle|steering-wheel part. This figure shows a state in which the left side of the left and right half-structured handle housing is removed. This figure shows a state in which the connecting portion of the hanging portion is damaged and the notification member has moved. It is a right view of the portable cutting machine which concerns on 2nd Embodiment. This figure shows a state in which the hook is positioned in the retracted position. 11. It is the front view which looked at the portable cutting machine which concerns on 2nd Embodiment from the arrow (XII) direction in FIG. 11. It is the top view which looked at the portable cutting machine which concerns on 2nd Embodiment from the arrow (XIII) direction in FIG. FIG. 13 is a left side view of the portable cutting machine according to the second embodiment, viewed from the direction of the arrow (XIV) in FIG. 12; FIG. 8 is a plan view of a portable cutting machine according to a second embodiment; This figure shows a state in which the hook is positioned at the forward use position. It is a front view of the portable cutting machine which concerns on 2nd Embodiment. This figure shows a state in which the hook is positioned at the forward use position. FIG. 8 is a plan view of a portable cutting machine according to a second embodiment; This figure shows a state in which the hook is positioned in the lateral use position. It is a front view of the portable cutting machine which concerns on 2nd Embodiment. This figure shows a state in which the hook is positioned in the lateral use position. 11. It is the rear view which looked at the suspension part which concerns on 2nd Embodiment from the arrow (XIX) direction in FIG. FIG. 20 is a cross-sectional view taken along the line (XX)-(XX) in FIG. 19 of the hanging part according to the second embodiment; This figure shows a normal state in which the joint is not damaged. It is a perspective view of the suspension part of 2nd Embodiment. This figure shows a normal state in which the joint is not damaged. It is a vertical cross-sectional view of the suspension part which concerns on 2nd Embodiment. This figure shows a state in which the notification member has moved due to damage to the connecting portion. It is a perspective view of the suspension part which concerns on 2nd Embodiment. This figure shows a state in which the notification member has moved due to damage to the connecting portion. It is a perspective view of the information member which concerns on the suspension part of 2nd Embodiment. It is a right view of the portable cutting machine which concerns on 3rd Embodiment. This figure shows a state in which the hook is taken out to the forward position. FIG. 26 is a front view of the portable cutting machine according to the third embodiment, viewed from the direction of the arrow (XXVI) in FIG. 25; It is a right view of the portable cutting machine which concerns on 3rd Embodiment. This figure shows a state in which the hook is retracted to the retracted position. FIG. 28 is a front view of the portable cutting machine according to the third embodiment, viewed from the direction of the arrow (XXVIII) in FIG. 27; It is a left view of the portable cutting machine which concerns on 4th Embodiment. This figure shows a state in which the hook is retracted to the retracted position. FIG. 30 is a front view of the portable cutting machine according to the fourth embodiment as seen from the arrow (XXX) direction in FIG. 29; This figure shows a state in which the hook is retracted to the retracted position. It is a left view of the portable cutting machine which concerns on 4th Embodiment. This figure shows a state in which the hook is taken out to the use position. 31. It is the front view which looked at the portable cutting machine which concerns on 4th Embodiment from the arrow (XXXII) direction in FIG. This figure shows a state in which the hook is taken out to the use position. FIG. 11 is a side view showing a state in which the portable cutting machine according to the fourth embodiment is hung on a workbench using a hook; It is a left view of the portable cutting machine which concerns on 5th Embodiment. This figure shows a state in which the hook is retracted to the retracted position. FIG. 35 is a front view of the portable cutting machine according to the fifth embodiment as seen from the arrow (XXXV) direction in FIG. 34; This figure shows a state in which the hook is retracted to the retracted position. It is a left view of the portable cutting machine which concerns on 5th Embodiment. This figure shows a state in which the hook is taken out to the use position. FIG. 37 is a front view of the portable cutting machine according to the fifth embodiment as seen from the arrow (XXXVII) direction in FIG. 36; This figure shows a state in which the hook is taken out to the use position. It is a left view of the portable cutting machine which concerns on 6th Embodiment. This figure shows a state in which the hook is retracted to the retracted position. FIG. 39 is a front view of the portable cutting machine according to the sixth embodiment, viewed from the arrow (XXXIX) direction in FIG. 38; This figure shows a state in which the hook is retracted to the retracted position. It is a left view of the portable cutting machine which concerns on 6th Embodiment. This figure shows a state in which the hook is taken out to the use position. FIG. 41 is a front view of the portable cutting machine according to the sixth embodiment, viewed from the direction of the arrow (XXXXI) in FIG. 40; This figure shows a state in which the hook is taken out to the use position. It is a left view of the portable cutting machine which concerns on 7th Embodiment. This figure shows a state in which the hook is retracted to the retracted position. FIG. 43 is a rear view of the portable cutting machine according to the seventh embodiment as seen from the arrow (XXXXIII) direction in FIG. 42; This figure shows a state in which the hook is retracted to the retracted position. It is a left view of the portable cutting machine which concerns on 7th Embodiment. This figure shows a state in which the hook is taken out to the use position. FIG. 45 is a rear view of the portable cutting machine according to the seventh embodiment, viewed from the arrow (XXXXV) direction in FIG. 44; This figure shows a state in which the hook is taken out to the use position.

Next, embodiments of the present invention will be described with reference to FIGS. 1 to 45. FIG. 1 to 10 show a portable cutting machine 1 according to a first embodiment of the invention. A portable cutting machine 1 according to the first embodiment is a hand-held cutting machine for metalworking called a chip saw cutter, and includes a base 10 that abuts on a material W to be cut, and a cutting machine main body supported on the upper surface side of the base 10 . 20. The base 10 has a rectangular flat plate shape and is brought into contact with the upper surface of the workpiece W to be cut.

As shown in FIGS. 1 to 4, the cutting machine body 20 includes an electric motor 21 as a drive source, a circular rotating blade 22, and a loop-shaped handle portion . A tipped saw for cutting steel materials is used as the rotary blade 22 . A dust-proof fixed cover 24 covers the entire upper half circumference range of the rotary cutting tool 22 (the upper surface side range of the base 10). The fixed cover 24 can be removed from the periphery of the rotary blade 22 by loosening the fixing screw 24a. An arrow 24b indicating the direction of rotation of the rotary cutting tool 22 is displayed on the right side surface of the fixed cover 24. As shown in FIG. A rear portion of the fixed cover 24 is provided with a lid portion 24c for discharging collected cutting powder.

As shown in FIG. 8 , the electric motor 21 is coupled to the left side surface of the fixed cover 24 via a reduction gear portion 25 . A support arm portion 25b is provided integrally with the front portion of the gear housing 25a of the reduction gear portion 25, which has a substantially cylindrical shape. The support arm portion 25b extends forward. A front portion of the support arm portion 25b is coupled to the upper surface of the base 10 via a vertically swinging support shaft 26a. The cutting machine main body 20 is supported on the front upper surface of the base 10 so as to be vertically swingable via a vertically swinging support shaft 26a. The support arm portion 25b and the vertical swing support shaft 26a constitute a vertical swing support portion 26 for supporting the cutting machine main body 20 so as to swing vertically with respect to the base 10. As shown in FIG.

The lower side of the rotary cutting tool 22 protrudes downward through the window of the base 10 . A movable cover 12 covers the periphery of the lower side of the rotary cutting tool 22 protruding to the lower surface side of the base 10 . The movable cover 12 is provided so as to be openable and closable along the periphery of the rotary blade 22 . As shown in the figure, the movable cover 12 is relatively opened by moving the portable cutting machine 1 toward the cutting advancing side while the front end of the movable cover 12 is in contact with the material W to be cut.

The portion of the base 10 protruding downward is cut into the material W to be cut. The portion of the rotary blade 22 protruding toward the lower surface of the base 10 corresponds to the cutting depth of the rotary blade 22 into the material W to be cut. By vertically rocking the cutter main body 20 about the vertically rocking support shaft 26a, the cutting depth of the rotary blade 22 into the material W to be cut can be adjusted.

As shown in FIGS. 3 and 8, the rear side of the fixed cover 24 is coupled to the rear upper surface of the base 10 via a depth guide 27. As shown in FIGS. A fixed screw shaft 29 coupled to the left side of the fixed cover 24 is inserted through the guide groove of the depth guide 27 . By loosening the fixing lever 28 to loosen the fixing nut 29a with respect to the fixing screw shaft 29, the cutting machine main body 20 is swung vertically around the vertically swinging support shaft 26a to adjust the cutting depth. can be done.

A loop-shaped handle portion 23 is provided above the reduction gear portion 25 . A trigger-type switch lever 38 is provided on the inner peripheral side of the handle portion 23 . When the switch lever 38 is pulled upward with a fingertip, the main switch 39 is turned on. When the main switch 39 is turned on, the electric motor 21 is started. When the pulling operation of the switch lever 38 is released, the main switch 39 is turned off and the electric motor 21 is stopped.

A front portion 23a of the handle portion 23 is coupled to an upper portion of the gear housing 25a. A front portion 23a of the handle portion 23 rises upward from the upper portion of the gear housing 25a. A grip portion 23b extends obliquely downward to the rear from the upper portion of the front portion 23a. The rear portion of the grip portion 23b is coupled to the rear surface side of the gear housing 25a via the battery mounting portion 30. As shown in FIG. One battery pack 31 is attached to the lower surface side of the battery attachment portion 30 . The electric motor 21 as a drive source operates using the battery pack 31 as a power source. The battery pack 31 can be used repeatedly by removing it from the battery mounting portion 30 and charging it. As indicated by the white arrow in FIG. 3, the battery pack 31 can be attached to the battery attachment portion 30 by sliding it to the right, and can be removed by sliding it to the left.

A light fixture 11 is provided in front of the reduction gear portion 25 and below the front portion 23 a of the handle portion 23 . The lighting device 11 brightly illuminates the cutting portion (the cutting portion of the rotary blade 22 with respect to the material W to be cut), which facilitates cutting work in a dark place or the like.

As shown in FIGS. 7 and 8, the motor housing 21a of the electric motor 21 is screwed to the gear housing 25a of the reduction gear portion 25. As shown in FIG. A brushless motor is used for the electric motor 21 . An annular stator 21b is fixed along the inner peripheral side of the motor housing 21a, and a rotor 21c is rotatably supported on the inner peripheral side of the stator 21b. A cooling fan 21e is attached to the motor shaft 21d coupled to the rotor 21c. When the electric motor 21 is activated and the cooling fan 21e rotates, outside air is introduced from the intake hole 21f provided in the rear portion of the motor housing 21a. The outside air introduced from the intake hole 21f flows rightward through the motor housing 21a, thereby cooling the stator 21b, the rotor 21c, and the like. The right end of the motor shaft 21 d is meshed with the gear train of the reduction gear portion 25 .

As shown in FIG. 7, the rotational output of the electric motor 21 is transmitted to the output shaft 32 through a two-stage reduction gear train. The output shaft 32 enters inside the fixed cover 24 . The rotary blade 22 is attached to the right end of the output shaft 32 inside the fixed cover 24 . The rotary cutting tool 22 is sandwiched between the two mounting flanges 33 and 34 and attached to the left end of the output shaft 32 in this sandwiched state by tightening the cutting tool fixing screw 13 .

As shown in FIG. 8 , a controller housing portion 35 is provided on the rear side of the electric motor 21 and between the battery mounting portion 30 and the electric motor 21 . A controller 36 for mainly controlling the operation of the electric motor 21 is housed in the controller housing portion 35 . The controller 36 is a rectangular shallow-bottomed case housing a control board and resin-molded, and is housed in a tilted posture with its front side facing upward, as indicated by broken lines in FIGS. The motor cooling air introduced into the motor housing 21a by the cooling fan 21e of the electric motor 21 also flows into the controller accommodating portion 35 to cool the controller 36. As shown in FIG.

The portable cutting machine 1 of the first embodiment has a connecting part for connecting a hanging tool 41 such as a tether strap for hanging the portable cutting machine 1 on a scaffolding or a handrail at a work site, for example. 40, and a hanging hook 50 for directly hooking onto a scaffold, a handrail, or the like. The connecting portion 40 is provided in the rear portion of the handle portion 23 and near the connecting portion between the grip portion 23 b and the battery mounting portion 30 . Details of the coupling portion 40 according to the first embodiment are shown in FIGS. 9 and 10. FIG. Coupling portion 40 includes a generally triangular coupling aperture 42 . The coupling hole 42 penetrates the rear side of the grip portion 23b in the left and right direction.

As shown in FIGS. 2, 3, 9, and 10, the handle portion 23 has a structure in which a left handle housing 23L and a right handle housing 23R, which are divided into right and left halves, are butted against each other and joined together. The left handle housing 23L and the right handle housing 23R are connected to each other by a total of four screwing portions 37. As shown in FIG. In the figure, the butted portion of the left handle housing 23L and the right handle housing 23R is marked with J. As shown in FIG. 9 and 10, the left handle housing 23L is omitted. The coupling hole 42 penetrates the left and right handle housings 23L, 23R.

As shown in FIG. 9, a wall portion 42a is provided around the coupling hole 42. As shown in FIG. A coupling hole 42 is provided on the inner peripheral side of the wall portion 42a. One screwing portion 37 is arranged adjacent to the coupling hole 42 . A notification member 43 is mounted across both the wall portion 42 a of the coupling hole 42 and the boss portion of the screwing portion 37 . In this embodiment, an annular metal wire is used for the notification member 43 . The notification member 43 is assembled with the wall portion 42a of the coupling hole 42 and the boss portion of the screwing portion 37 located on the inner peripheral side thereof. The notification member 43 is incorporated in the handle portion 23 at the stage of assembling the portable cutting machine 1 .

As shown in FIG. 9, a suspender 41 such as a strap is inserted through a coupling hole 42 and is coupled to the coupling portion 40 by winding around the end portion 23c of the handle portion 23. As shown in FIG. For this reason, the hanging member 41 is inserted through the joint hole 42 and is joined to the joint portion 40 while also being inserted through the inner peripheral side of the notification member 43 .

According to the coupling portion 40, as shown in FIG. 10, the end portion 23c of the handle portion 23 is subjected to an external force due to long-term use of the hanging member 41, and as a result, the end portion 23c is damaged and broken. As a result, the suspension member 41 is disengaged from the coupling hole 42 . However, the suspender 41 is also inserted through the inner peripheral side of the notification member 43 as described above. Therefore, even if the end portion 23c of the handle portion 23 is broken and the suspension member 41 is removed from the coupling hole 42, the state in which the notification member 43 is inserted through the inner peripheral side is maintained. Moreover, the notification member 43 is maintained in a hooked state with the boss portion of the screwing portion 37 located on the inner peripheral side. Therefore, the suspension tool 41 is maintained in a state of being coupled to the handle portion 23 via the notification member 43, and as a result, the suspension function of the suspension tool 41 is maintained.

As shown in FIG. 10, when the end 23c of the handle portion 23 is broken and separated, and as a result the hanging member 41 is removed from the connecting hole 42, the notification member 43 is pulled out from the inside of the handle portion 23. . Since the notification member 43 incorporated inside the coupling portion 40 is pulled out to the outside, the user or the like can easily visually check the pulled-out notification member 43 . A user or the like can confirm that the inside of the connecting portion 40 has been deformed or damaged by an external force by visually checking the pulled-out notification member 43 . In this manner, the notification member 43 has a function of reliably informing the user or the like that the coupling portion 40 of the suspension member 41 is deformed or damaged.

As shown in FIGS. 1 to 4, the portable cutting machine 1 of the present embodiment includes a hanging hook 50 in addition to the connecting portion 40 for connecting the hanging tool 41 described above. The hanging hook 50 is provided in the front part of the cutting machine body 20 and in front of the fixed cover 24 . In the first embodiment, the suspension hook 50 is provided on the upper surface of the support arm portion 25b that supports the cutting machine main body 20 by swinging with respect to the base 10. As shown in FIG. The suspension hook 50 includes a hook bar 51 made by bending a steel bar into a J shape, and a hook support portion 52 that supports the hook bar 51 on the upper surface of the support arm portion 25b.

The hook bar 51 has a support portion 51a extending in the left-right direction, an intermediate portion 51b extending upward from the right end portion of the support portion 51a, and a hook portion 51c extending leftward from the upper portion of the intermediate portion 51b. The support portion 51a extends long to the right from the hook support portion 52 . An intermediate portion 51b extends substantially perpendicularly from the right end of the support portion 51a. A hook portion 51c extends leftward from the upper portion of the intermediate portion 51b. The hook portion 51c extends in a slightly acute angle direction from the upper portion of the intermediate portion 51b. A positioning projection 51d is provided on the support portion 51a. A hooking protrusion 51e is provided on the tip side of the hooking portion 51c for engaging with a hooking target portion such as a scaffolding.

As shown in FIG. 3, the hook support portion 52 is screwed to the upper surface of the support arm portion 25b with two mounting screws 52a. The hook support portion 52 is provided with a cylindrical support tube portion 52b. The support portion 51a is rotatably and axially movably inserted into the support cylinder portion 52b. As a result, the hook bar 51 is supported so as to be vertically swingable and laterally displaceable about a supporting portion 51a (horizontal horizontal axis) parallel to the rotation axis of the rotary cutting tool 22 . As shown in FIG. 5, two V-shaped engagement grooves 52c and 52d are provided at the left end of the support cylinder 52b. The two engaging grooves 52c and 52d are arranged in a radial direction passing through the center of the support cylinder 52b with a certain angle (approximately 120° in this embodiment) to each other.

The left end portion of the support portion 51a of the hook bar 51 protrudes from the left end portion of the support cylinder portion 52b, and an engaging pin 51f is provided at this protruding portion. The engagement pins 51f protrude on both radial sides of the support portion 51a. Although not visible in the drawing, a compression spring is interposed between the inner peripheral side of the support cylinder portion 52b and the support portion 51a. The compression spring urges the support portion 51a rightward in the axial direction. This biasing force holds the engagement pin 51f in a state of being fitted in the engagement groove 52c or the engagement groove 52d, thereby restricting the rotation of the support portion 51a. By restricting the rotation of the support portion 51a, the hook bar 51 is held at a retracted position with the hook portion 51c positioned upward and a use position with the hook portion 51c positioned downward (forward). 1 to 4 show the state in which the hook bar 51 is stored in the retracted position. FIG. 5 shows a state in which the hook bar 51 is taken out to the use position.

As shown in FIGS. 1 to 4, when the hook bar 51 is stored in the retracted position, the middle portion 51b thereof is tilted rearward and obliquely upward from the vicinity of the front end portion of the base 10. As shown in FIG. On the other hand, when the hook bar 51 is taken out to the use position, it is in a state of being substantially horizontally protruding forward from the vicinity of the front end portion. Since the hooking part 51c of the hook bar 51 is taken out at a portion far forward from the front end of the base 10, the hook bar 51 can be easily hooked on a scaffolding or a handrail, and in this respect the usability of the hanging hook 50 can be improved. can be done. As shown in FIG. 5, the use position of the hook bar 51 is a position where it does not protrude to the lower surface side of the base 10 and is regulated to a position above the base 10 . This prevents the hook bar 51 from interfering with the material W to be cut and the rotary blade 22 even if the hook bar 51 is carelessly moved to the use position during the cutting operation.

The hooking portion 51c of the hook bar 51 is bent toward the center of gravity of the portable cutting machine 1 at an acute angle from the tip of the intermediate portion 51b. For this reason, the hook bar 51 is hooked by locating the part to be hooked between the supporting part 51a and the hooking part 51c. The portable cutting machine 1 can also be suspended in a stable posture by placing it.

11 to 24 show the portable cutting machine 1 according to the second embodiment. For members or configurations equivalent to those of the portable cutting machine 1 of the first embodiment, the same symbols are used, and the description thereof is omitted. The portable cutting machine 1 of the second embodiment is a hand-held cutting machine mainly for cutting wood or the like, and is also called a portable circular saw. The portable cutting machine 1 of the second embodiment differs from the portable cutting machine 1 of the first embodiment in that a circular circular saw blade is used as the rotary cutting tool 61 . The fixed cover 62 is provided along the upper peripheral edge of the rotary blade 61, and the central side of the rotary blade 61 is exposed to the side for convenience when changing the blade. In this respect, in the portable cutting machine 1 of the first embodiment, almost the entire rotary blade 22 is covered on the upper surface side of the base 10 to improve the dust collecting performance. In the first embodiment, the fixed cover 24 is detachable for convenience when changing the cutting tool.

Also in the portable cutting machine 1 of the second embodiment, the cutting machine main body 20 is supported so as to be vertically swingable with respect to the base 10 about the vertically swinging support shaft 63a of the vertically swinging support portion 63. It is provided with a cutting depth adjustment mechanism for the cutting material W of the rotary blade 61, like the portable cutting machine 1 of the first embodiment. In the portable cutting machine 1 of the second embodiment, the cutting machine main body 20 is supported so as to be able to swing left and right via a front side supporting portion 64 for the front side of the base 10 and a rear side supporting portion 65 for the rear side. . By inclining the cutting machine main body 20 to the left and right, so-called oblique cutting can be performed. The portable cutting machine 1 of the second embodiment differs from the portable cutting machine 1 of the first embodiment in that it has an oblique cutting function.

In the portable cutting machine 1 of the second embodiment, a front grip portion 68 is provided on the front portion of the handle portion 23 . The user is positioned on the rear side of the portable cutting machine 1, grasps the handle portion 23 with the right hand, grasps the front grip section 68 with the left hand, and operates to move the portable cutting machine 1 in a stable state. In this respect, the operability of the portable cutting machine 1 is enhanced.

As shown in FIG. 14, in the portable cutting machine 1 of the second embodiment, a controller 66 for controlling the operation of the electric motor 21 is housed in a controller housing portion 67 provided on the front side of the electric motor 21 . By arranging the controller accommodating portion 67 on the front side of the electric motor 21, unlike the first embodiment, the battery mounting portion 30 can be arranged closer to the electric motor 21, thereby allowing the cutting machine main body 20 to move forward and backward. Directional compactification is achieved. For this reason, as shown in FIGS. 11, 13 and 14, in the portable cutting machine 1 of the second embodiment, the cutting machine main body 20 does not protrude from the rear end of the base 10, thereby making it portable. The handling of the cutting machine 1 during cutting work is enhanced, and the compactness when stored is ensured.

The portable cutting machine 1 of the second embodiment has a connecting portion 70 and a hanging hook 80 that are different in configuration from the connecting portion 40 and the hanging hook 50 according to the first embodiment. The connecting portion 70 is a portion for connecting a hanging tool 71 such as a so-called tether strap, and is provided on the rear surface of the handle portion 23 as in the first embodiment. Details of the coupling portion 70 according to the second embodiment are shown in FIGS. 19-24.

A joint portion 70 according to the second embodiment includes a joint hole 72 . The coupling hole 72 is provided in a U-shaped path along the circumference of the screwing portion 37 that abuts and couples the left handle housing 23L and the right handle housing 23R of the left and right halves of the handle portion 23 . Therefore, the openings 72 a and 72 b of the coupling hole 72 are provided both above and below the screwing portion 37 . The coupling hole 72 is separated from the inside of the handle portion 23 by a wall portion 72c provided along the periphery of the screwing portion 37. As shown in FIG. The coupling hole 72 is provided along a U-shaped path along between the wall portion 72c and the screwing portion 37. As shown in FIG.

A notification member 73 is incorporated inside the coupling hole 72 . FIG. 24 shows the notification member 73 alone. The notification member 73 according to the second embodiment is manufactured by bending a steel bar. and an engaging portion 73b, and a leg portion 73c formed by bending the other end of the hook portion 73a forward into an L-shape. A circularly bent support portion 73d is provided at the front portion of the leg portion 73c. As shown in FIGS. 20 to 23, the notification member 73 is incorporated in the coupling hole 72 with its hooking portion 73a positioned substantially below the screwing portion 37. As shown in FIGS.

The engaging portion 73b, the leg portion 73c, and the support portion 73d of the notification member 73 are positioned outside the wall portion 72c of the coupling hole 72 via a notch portion 72d provided in the wall portion 72c. As shown, the right leg portion 73c is coupled by hooking the support portion 73d to an engaging portion 74 provided on the right handle housing 23R. Although omitted in the drawing, the left engaging portion 73b is inserted into an engaging hole provided in the inner surface of the left handle housing 23L. In this manner, the left engaging portion 73b and the right leg portion 73c are coupled to the left and right handle housings 23L and 23R, and the hook portion 73a is provided so as to be able to swing up and down within the opening range of the notch portion 72d. there is

As shown in FIGS. 20 and 21 , the hanging member 71 is wound around the screwing portion 37 and coupled while the inside of the hook portion 73 a of the notification member 73 is inserted. According to the connecting portion 70 configured in this manner, an external force is applied to the screwing portion 37 due to long-term use of the hanging member 71, and as a result, the screwing portion 37 is damaged as shown in FIGS. Even if the hanging member 71 is received and dropped, the hanging member 71 is maintained in a state of being hooked on the hook portion 73 a of the notification member 73 . The notification member 73 is maintained in a state of being connected to the handle portion 23 via the engaging portion 73b and the leg portion 73c. Therefore, the suspension tool 71 is maintained in a state of being coupled to the handle portion 23 via the notification member 73, and as a result, the suspension function of the suspension tool 71 is maintained.

Further, when the screwing portion 37 is broken and separated from the coupling portion 70, and as a result, the hanging member 71 is removed from the coupling hole 72, the notification member 73 is pulled out from the opening 72b on the lower side of the coupling hole 72 to the outside. Since the notification member 73 incorporated inside the coupling portion 70 is pulled out to the outside, the user or the like can easily visually check the pulled-out notification member 73 . A user or the like can confirm that the interior of the coupling portion 70 has been deformed or damaged by an external force by visually checking the notification member 73 pulled out from the coupling portion 70 . In this manner, the notification member 73 has a function of reliably informing the user that the coupling portion 70 of the suspension member 71 is deformed or damaged. The notification function of the notification member 73 can alert the user of the portable cutting machine 1, as in the first embodiment.

As shown in FIGS. 11 to 14, the suspension hook 80 according to the second embodiment is supported on the front portion of the fixed cover 62. As shown in FIGS. The suspension hook 80 includes a hook bar 81 made by bending a steel bar into a J shape, and a hook support portion 82 that supports the hook bar 81 on the front portion of the fixed cover 62 . The hook bar 81 has a support portion 81a extending upward from the hook support portion 82, an intermediate portion 81b extending substantially perpendicularly from the upper portion of the support portion 81a, and a hook portion 81c extending downward at an acute angle from the tip of the intermediate portion 81b. have. A hooking protrusion 81d for engaging a hooking target portion such as a scaffolding is provided on the tip side of the hooking portion 81c. As shown in FIG. 11, the support portion 81a is inclined in a rearward tilting direction in which the upper portion thereof is displaced rearward.

The hook support portion 82 is screwed to the front portion of the fixed cover 62 with two mounting screws 82a. The hook support portion 82 is provided with a cylindrical support tube portion 82b. A lower portion of the support portion 81a is inserted into the support cylinder portion 82b so as to be rotatable and axially movable. As a result, the hook bar 81 is supported so as to be able to swing left and right around the support portion 81a and to be displaceable up and down.

The lower end of the support portion 81a of the hook bar 81 protrudes from the lower end of the support cylinder portion 82b. Engagement pins 81e that protrude to both sides in the radial direction are provided on the projecting portion of the support portion 81a. Two V-shaped engagement grooves passing through the center are provided at the lower end of the support cylinder portion 82b. As in the first embodiment, the engaging pin 81e is fitted into one of the engaging grooves to restrict the rotation of the supporting portion 81a, thereby locking the position of the hook bar 81. As shown in FIG. In the second embodiment, the hook bar 81 is held at four positions around its support portion 81a. As in the first embodiment, the support portion 81a of the hook bar 81 is urged upward by a compression spring interposed between it and the support cylinder portion 82b. The biasing force of the compression spring keeps the engagement pin 81e fitted in the engagement groove, and holds the position of the hook bar 81 around the support portion 81a.

11 to 14 show a state in which the hook portion 81c is held in the retracted position in front of the handle portion 23 (left side of the fixed cover 62). 15 and 16 show a state in which the hook portion 81c is positioned in front of the fixed cover 62 and held at the front use position. 17 and 18 show a state in which the hook portion 81c is positioned on the right side of the fixed cover 62 and held at the side use position. At each position, the hook bar 81 is held by elastically fitting the engaging pin 81e into the corresponding engaging groove. Although not shown, the hook bar 81 can be reversed by 180° from the front use position, and the hooking portion 81c can be positioned above the fixed cover 62 and held at the retracted position. In this manner, the hook bar 81 has four positions in which the hooking portion 81c is positioned in front, above, left and right sides of the fixed cover 62, and the engaging pin 81e is elastically fitted into the engaging groove. Each position is held by inserting it.

According to the hanging hook 80 according to the second embodiment, the compactness of the portable cutting machine 1 can be ensured by storing the hook bar 81 in a storage position where it does not get in the way when not in use. On the other hand, the portable cutting machine 1 can be suspended in different postures by selecting and holding the hook bar 81 at the front use position or the side use position according to the conditions of the work site. In this respect, the function of the hanging hook 80 can be enhanced.

Further, as in the first embodiment, the hooking portion 81c of the hook bar 81 is bent toward the center of gravity of the portable cutting machine 1 at an acute angle from the tip of the intermediate portion 81b. For this reason, the hook bar 81 is hooked by locating the part to be hooked between the support part 81a and the hook part 81c, and the tip part 81cc of the hook part 81c is abutted against the upper surface of the workbench or the scaffold. The portable cutting machine 1 can also be suspended in a stable posture by placing it.

The suspension hook 50 of the first embodiment and the suspension hook 80 of the second embodiment are configured such that the engagement pins are elastically fitted into the engagement grooves in order to hold the positions of the hook bars 51 and 81. , the positions of the hook bars 51 and 81 may be locked by tightening the fixing screws, for example.

25 to 28 show the portable cutting machine 1 of the third embodiment. The portable cutting machine 1 of the third embodiment differs from the portable cutting machine 1 of the second embodiment in that it has a hanging hook 91 different from the hanging hook 80 of the second embodiment. Since members and configurations other than the hanging hook 91 are the same as those of the portable cutting machine 1 of the second embodiment, the same symbols are used and the description thereof is omitted. The rear portion of the handle portion 23 of the portable cutting machine 1 in the third embodiment is also provided with a connecting portion 70 for connecting a hanging tool 71 such as a tether strap, as in the second embodiment.

A hanging hook 91 according to the third embodiment is supported on the front portion of the fixed cover 62 as in the second embodiment. The suspension hook 91 includes a hook bar 92 made by bending a steel bar into a J shape, and a hook support portion 93 that supports the hook bar 92 on the front portion of the fixed cover 62 . The hook bar 92 has a support portion 92a extending upward from the hook support portion 93, an intermediate portion 92b extending substantially perpendicularly from the upper portion of the support portion 92a, and a hook portion 92c extending downward at an acute angle from the tip of the intermediate portion 92b. have. A hooking projection 92d for engaging a hooking target portion such as a scaffolding is provided on the tip side of the hooking portion 92c. As shown in FIG. 25, the support portion 92a is inclined in a rearward tilting direction in which the upper portion thereof is displaced rearward, and this point is also configured in the same manner as the hanging hook 80 according to the second embodiment.

A support portion 92a of the hook bar 92 is coaxially provided with a support shaft portion 92e having a smaller diameter. The support shaft portion 92e extends downward from the lower end of the support portion 92a. The lower portion of the support shaft portion 92e protrudes from the lower end of the support cylinder portion 93a. Engagement pins 95 are provided in this protruding portion so as to protrude radially on both sides.

The hook support portion 93 has a cylindrical support tube portion 93a and an attachment portion 93f for the fixed cover 62. As shown in FIG. The hook support portion 93 is attached to the front portion of the fixed cover 62 by connecting the attachment portion 93f with two attachment screws 94 . The support cylinder portion 93a in the third embodiment has a cylindrical shape that is longer than the support cylinder portion 82b in the second embodiment. Two insertion holes having different diameters are coaxially provided on the inner peripheral side of the support cylinder portion 93a. The upper insertion hole 93b is formed to have a larger diameter than the lower insertion hole 93c. The upper insertion hole 93b is formed with a diameter that allows the support portion 92a of the hook bar 92 to be inserted. The lower insertion hole 93c is formed to have a diameter through which the support shaft portion 92e of the hook bar 92 can be inserted and through which the support portion 92a having a larger diameter cannot be inserted.

A compression spring 96 is interposed around the support shaft portion 92e of the hook bar 92 and between the lower surface of the support portion 92a and the bottom portion of the insertion hole 93b. The biasing force of the compression spring 96 biases the support portion 92a upwardly out of the insertion hole 93b of the support cylinder portion 93a, thereby biasing the hook bar 92 upwardly to the upper position side. 25 and 26 show the hook bar 92 in the upper position.

Two engagement grooves 93d and 93e having different depths in the longitudinal direction are provided on the lower surface of the support cylinder 93a. The engaging groove portion 93d is formed deep, and the engaging groove portion 93e is formed shallow. When viewed from the bottom of the support cylinder portion 93a (viewed from the direction indicated by the arrow XXV in FIG. 25), the deep engagement groove portion 93d and the shallow engagement groove portion 93e are provided radially through the center of the bottom surface of the support cylinder portion 93a. and arranged crisscross one another.

As shown in FIG. 25, when the hook bar 92 is rotated around the support portion 92a and the engagement pin 95 is positioned in the deep engagement groove portion 93d, the hook bar 92 pushes the engagement pin 95 by the biasing force of the compression spring 96. It is held in an upper position in contact with the bottom of the engaging groove 93d. When the hook bar 92 is positioned at the upper position, the intermediate portion 92b extends obliquely upward forward from the upper portion of the support portion 92a (upper use position) or obliquely downward rearward (upper storage position). becomes. In the upper use position where the intermediate portion 92b extends obliquely forward and upward, the hook portion 92c is positioned above the front portion of the base 10. As shown in FIG. The upper use position of the hook bar 92 corresponds to a convenient use position for hooking onto other parts such as scaffolds. At the upper retracted position which is 180° inverted from the upper use position, the intermediate portion 92b and the hook portion 92c can be positioned above the fixed cover 62. As shown in FIG.

By pushing down the hook bar 92 from the position of use to disengage the engaging pin 95 from the deep engaging groove 93d, rotating the hook bar 92 about 90 degrees around the supporting portion 92a, and then stopping the pushing operation, the hook bar 92 is released. When it is returned upward, the engaging pin 95 is fitted into the shallow engaging groove portion 93e. This state is shown in FIGS. 27 and 28. FIG. When the hook bar 92 is positioned at a position where the engaging pin 95 is fitted into the shallow engaging groove 93e, the hook bar 92 as a whole is held at a position lower than the use position. This low position corresponds to the retracted position of the hook bar 92 . When the hook bar 92 is stored in the retracted position as shown in the drawing, the intermediate portion 92b extends leftward from the upper portion of the support portion 92a, and as a result, the hook portion 92c is positioned in front of the handle portion 23. Become. Therefore, when the hook bar 92 is stored in the retracted position, it is positioned lower than the use position and further rearward, and in this respect, the portable cutting machine 1 can be made compact. Since the cutting work can be performed with the hook bar 92 stored compactly, the workability of the portable cutting machine 1 can be improved.

According to the portable cutting machine 1 of the first embodiment described above, the suspension hook 50 is suspended from the front part of the cutting machine main body 10 on the upper surface of the support arm part 25b (near the vertical swing support part 26). A hook 50 is provided. The hanging hook 50 is arranged in front of the fixed cover 24 by being provided at such a portion. Therefore, it becomes easy to move the portable cutting machine 1 while holding the handle portion 23 and hook the hook bar 51 to another part such as a scaffolding. Usability can be further improved.

In addition to the structure provided on the upper surface of the support arm portion 25b like the hanging hook 50 according to the first embodiment, the front part of the fixed cover 24 like the hanging hooks 80 and 91 according to the second and third embodiments. , and arranged forward of the fixed cover 24 . The hook bars 81 and 92 of the hanging hooks 80 and 91 of the second and third embodiments are supported in front of the fixed cover 24 via hook support portions 82 and 93 directly attached to the front surface of the fixed cover 24, respectively. . The hanging hooks 80 and 91 of the second and third embodiments are also provided in front of the fixed cover 24, so that usability can be improved.

In addition, since the hanging hook 50 of the first embodiment is arranged on the upper surface of the support arm portion 25b by effectively utilizing the empty space in the vicinity of the vertical swing support portion 26, the hanging hook 50 is compact. can enhance sexuality.

Furthermore, according to the hanging hook 50 of the first embodiment, the use position of the hook bar 51 is restricted to a range that does not protrude to the lower surface side of the base 10 . This prevents the hook bar 51 from interfering with the material W to be cut and the rotary blade 22 even if the hook bar 51 is carelessly moved to the use position during the cutting operation.

According to the hanging hooks 80 and 91 of the second and third embodiments, the hook bars 81 and 92 are rotated around the vertical vertical axis (the axis of the support portions 81a and 92a) in the tangential direction to the peripheral edge of the fixed cover 62 for use. It can be retrieved into position and stored in a storage position.

In particular, according to the hanging hook 91 of the third embodiment, the hook bar 92 can be moved in the vertical vertical axis (the axial direction of the support portion 92a) to the upper use position and the lower storage position. In this respect, the usability of the hanging hook 91 can be further enhanced, and compactness at the time of storage can be enhanced.

Further, as in the first and second embodiments, the hooking portion 92c of the hook bar 92 of the third embodiment is bent at an acute angle from the tip of the intermediate portion 92b toward the center of gravity of the portable cutting machine 1. . For this reason, the part to be hooked is positioned between the support part 92a and the hooking part 92c, and the hook bar 92 is hooked. The portable cutting machine 1 can also be suspended in a stable posture by placing it.

Further modifications can be added to the embodiments described above. For example, although the J-shaped hook bars 51, 81, and 92 are illustrated, hook bars bent into an L-shape or a loop-shaped configuration may be used.

In addition, although the configuration in which the hanging hooks 50, 80, 91 are arranged near the vertical swing support portions 26, 63 or in front of the fixed covers 24, 62 has been illustrated, if it is in front of the fixed covers 24, 62, for example, the front side A suspension hook may be provided on the upper surface of the support portion 64 or the base 10 .

Furthermore, in the first embodiment, the portion where the hanging hook is arranged is provided on the upper surface of the support arm portion 25b that supports the cutting machine main body 20 with respect to the base 10, and in the second and third embodiments, it is provided on the upper surface of the support arm portion 25b. Although the structure provided in the front part of the cover 24 was illustrated, it can also be provided in another site|part. For example, a suspension hook is provided on the left side of the handle portion 20 (fourth embodiment), a suspension hook is provided on the front portion of the electric motor 21 (fifth embodiment), and a suspension hook is provided on the upper portion of the electric motor 21. (sixth embodiment), and a suspension hook is provided at the rear portion of the handle portion 20 (seventh embodiment). The fourth to seventh embodiments are different in the part provided with the hanging hook, and the basic configuration of the portable cutting machine 1 is the same as that of the first embodiment, and no particular change is required. The same symbols are used for the same members and configurations as in the first embodiment, and the description thereof is omitted.

29 to 33 show a portable cutting machine 1 with a hanging hook 100 according to a fourth embodiment. A hanging hook 100 according to the fourth embodiment is provided on the left side of the handle portion 23 . The hanging hook 100 includes a hook bar 101 bent in a J shape and a hook supporting portion 102 that supports the hook bar 101 . The hook bar 101 includes a support portion 101a extending back and forth, an intermediate portion 101b extending vertically from the front end of the support portion 101a, and a hook portion 101c bending backward from the tip of the intermediate portion 101b. A hooking projection 101d is provided on the tip side of the hooking portion 101c.

The hook support portion 102 is screwed to a base portion 104 provided on the left side of the front portion 23 a of the handle portion 23 with two fixing screws 105 . A support portion 101a is inserted through a cylindrical hook support portion 102 so as to be rotatable about its axis and displaceable in the axial direction. An engagement pin 103 is attached to the rear portion of the support portion 101a protruding from the rear end surface of the hook support portion 102. As shown in FIG. By fitting the engaging pin 103 into the V-shaped engaging groove portion 102a provided in the rear end surface of the hook supporting portion 102, the hook bar 101 is held at the use position and the retracted position.

When the hook bar 101 is retracted to the retracted position as shown in FIGS. 29 and 30, the intermediate portion 101b extends downward from the tip of the support portion 101a. On the other hand, when the hook bar 101 is taken out to the use position as shown in FIGS. 31 and 32, the intermediate portion 101b extends upward and obliquely to the left from the tip of the support portion 101a.

According to the suspension hook 100 according to the fourth embodiment, the portable cutting machine 1 is suspended by hooking the hook bar 101 extending obliquely upward from the left side of the handle portion 23 to the end of a scaffold or a workbench. be able to. When the hanging hook 100 is not used, it can be stored in a position that does not interfere with the cutting work.

In the fourth embodiment, the usage position of the hook bar 101 is set particularly appropriately. As described above, the hook bar 101 includes a support portion 101a extending forward from the handle portion 23, an intermediate portion 101b extending vertically from the front portion of the support portion 101a, and a hook extending rearward by folding back from the tip of the intermediate portion 101b. It has a J shape with a portion 101c. When the hook bar 101 is taken out to the use position as shown in FIG. The use position of the hook bar 101 (directed upward to the left) is such that the center of gravity G of the portable cutting machine 1 is positioned on one virtual plane S on which the support portion 101a, the intermediate portion 101b, and the hook portion 101c are positioned. angle of inclination) is set. Moreover, the folding angle of the hooking portion 101c with respect to the intermediate portion 101b is set so that the hooking portion 101c extends toward the center of gravity G while being bent at an acute angle from the tip of the intermediate portion 101b. In this embodiment, the center of gravity G of the portable cutting machine 1 is positioned on one virtual plane S on which the support portion 101a, the intermediate portion 101b, and the hooking portion 101c are positioned. It does not need to be on the virtual plane S, and it is sufficient if a part of the peripheral area centered on the center of gravity G intersects the virtual plane S.

As described above, according to the hanging hook 100 of the fourth embodiment, the center of gravity G of the portable cutting machine 1 is placed on one virtual plane S including the support portion 101a, the intermediate portion 101b, and the hooking portion 101c of the hook bar 101. By setting the use position of the hook bar 101 so as to position the portable cutting machine 1, the suspension attitude of the portable cutting machine 1 can be stabilized.

Moreover, the folding direction of the hooking portion 101c is set so that the hooking portion 101c extends toward the center of gravity G side. For this reason, when there is no suitable hooking target portion to be positioned between the supporting portion 101a and the hooking portion 101c, the leading end portion 101cc of the hooking portion 101c is placed on the workbench D as shown in FIG. It can be hung in a state where it hits the top surface. Also in this case, since the center of gravity G of the portable cutting machine 1 is positioned vertically below the abutting portion of the tip portion 101cc, the portable cutting machine 1 can be suspended in a stable posture.

34 to 37 show the hanging hook 110 according to the fifth embodiment. A hanging hook 110 according to the fifth embodiment is provided at the front portion of the electric motor 10 . The suspension hook 110 includes a hook bar 111 made by bending a steel bar into a J shape, and a hook support portion 112 that supports the hook bar 111 in front of the electric motor 21 .

The hook bar 111 has a support portion 111a extending upward, an intermediate portion 111b extending laterally from the upper portion of the support portion 111a, and a hook portion 111c extending downward from the tip of the intermediate portion 111b. A hooking projection 111d for engaging with a hooking target portion such as a scaffolding is provided on the tip side of the hooking portion 111c.

The hook support portion 112 is coupled to the front portion of the motor housing 21a with two fixing screws 113. As shown in FIG. The support portion 111a of the hook bar 111 is inserted through the inner peripheral hole of the hook support portion 112 having a cylindrical shape so as to be rotatable around the axis and displaceable in the axial direction. The lower end side of the support portion 111 a protrudes downward from the lower portion of the hook support portion 112 . An engagement pin 114 is attached to the projecting portion. By fitting the engaging pin 114 into the V-shaped engaging groove 112a provided on the lower surface of the hook supporting portion 112, the hook bar 111 is held at the use position and the retracted position. The hook bar 111 is urged by a compression spring (not visible in the figure) interposed between the hook support portion 112 and the engagement pin 114 in the direction of fitting into the engagement groove portion 112a.

By pushing down the hook bar 111 against the spring biasing force to disengage the engaging pin 114 from the engaging groove 112a, the hook bar 111 is rotated around the axis of the supporting portion 111a. position and retracted position. 34 and 35 show a state in which the hook portion 111c is held at the retracted position in which the electric motor 21 is positioned on the rear side. 36 and 37 show a state in which the hook portion 111c is held in the position of use in which the hook portion 111c is positioned obliquely to the left and in front of the electric motor 21. As shown in FIG.

By changing the position of the engagement groove portion 112a provided on the lower surface of the hook support portion 112, the hook bar 111 can be changed between the use position and the retracted position. By taking out the hook bar 111 to the use position and locating the supporting portion 111c in front of and to the left of the electric motor 21, the hanging hook 110 can be used to hang the portable cutting machine 1 from a scaffold, a handrail, or the edge of a workbench. You can hang it in the department. By keeping the hook bar 111 in the retracted position, it is possible to prevent it from interfering with the cutting operation.

Further, as in the first to fourth embodiments, the hooking portion 111c of the hook bar 111 is bent toward the center of gravity G of the portable cutting machine 1 at an acute angle from the tip of the intermediate portion 111b. For this reason, the hook bar 111 is hooked by locating the part to be hooked between the supporting part 111a and the hooking part 111c, and similarly to the fourth embodiment shown in FIG. The portable cutting machine 1 can also be suspended in a stable posture by abutting the 111cc against the workbench D or the upper surface of the scaffolding.

38 to 41 show a portable cutting machine 1 with a hanging hook 120 according to a sixth embodiment. The hanging hook 120 of the sixth embodiment is provided slightly forward of the upper portion (top) of the motor housing 21a. The hanging hook 120 has a hook bar 121 and a hook support portion 122 that supports the hook bar 121 . The hook bar 121 includes a support portion 121a extending obliquely forward and downward from the hook support portion 122, an intermediate portion 121b extending downward or leftward from the tip of the support portion 121a, and a pull bar bent rearward from the tip of the intermediate portion 121b. A hanging portion 121c is provided. A hooking projection 121d is provided on the tip side of the hooking portion 121c.

A pedestal portion 123 is provided on the upper portion of the motor housing 21a. A hook support portion 122 is attached to the base portion 123 with two fixing screws 124 . The supporting portion 121a is inserted through the cylindrical hook supporting portion 122 so as to be axially displaceable and axially rotatable. Engagement pins 125 are provided on the rear portion of the support portion 121a and protrude rearward from the hook support portion 122 so as to protrude to both sides in the radial direction. The engaging pin 125 is elastically fitted into the V-shaped engaging groove portion 122a provided on the rear surface of the hook support portion 122, thereby holding the hook bar 121 at the storage position and the use position.

When the hook bar 121 is positioned at the retracted position as shown in FIGS. 38 and 39, the intermediate portion 121b and the hook portion 121c are positioned in front of the motor 21. As shown in FIGS. The hook bar 121 can be rotated around the axis of the support portion 121a and taken out to the use position. When the hook bar 121 is taken out to the use position as shown in FIGS. 40 and 41, the intermediate portion 121b extends obliquely upward to the left.

With the suspension hook 120 of the sixth embodiment as well, the portable cutting machine 1 can be suspended by taking out the hook bar 121 to the use position and hooking it on the end of a scaffold or workbench.

As in the first to fifth embodiments, in the sixth embodiment, the hooking portion 121c of the hook bar 121 is bent toward the center of gravity G of the portable cutting machine 1 at an acute angle from the tip of the intermediate portion 121b. It is For this reason, the hook bar 121 is hooked by locating the part to be hooked between the supporting part 121a and the hooking part 121c, and the tip part 121cc of the hooking part 121c abuts against the upper surface of the workbench D or the scaffolding. The portable cutting machine 1 can also be suspended in a stable posture by placing it (see FIG. 33).

42 to 45 show a portable cutting machine 1 having a suspension hook 130 according to a seventh embodiment. The suspension hook 130 of the seventh embodiment is provided on the rear side of the handle portion 23 . The hanging hook 130 includes a hook bar 131 and a hook support portion 132 that supports the hook bar 131 . The hook bar 131 includes a support portion 131a horizontally extending leftward from the hook support portion 132, an intermediate portion 131b extending downward or rearward from the tip of the support portion 131a, and a hook bent rightward from the tip of the intermediate portion 131b. A portion 131c is provided. A hooking projection 131d is provided on the tip side of the hooking portion 131c.

The supporting portion 131a of the hook bar 131 is inserted through the cylindrical hook supporting portion 132 so as to be rotatable around the axis and displaceable in the axial direction. Engagement pins 135 are attached to the end portions of the support portions 131a that protrude from the end surfaces of the hook support portions 132 so as to protrude to both sides in the radial direction. By fitting the engaging pin 135 into the V-shaped engaging groove 132a provided in the end surface of the hook supporting portion 132, the hook bar 131 is held at the use position and the retracted position.

A pedestal portion 134 is provided at the rear portion of the battery mounting portion 30 so as to protrude rearward. The hook support portion 132 is screwed to the base portion 134 with two fixing screws 133 . When the hook bar 131 is retracted to the retracted position as shown in FIGS. 42 and 43 , the intermediate portion 131 b extends downward and the hook portion 131 c is retracted along the rear of the battery pack 31 . By rotating the hook bar 131 about 90 degrees about the axis of the support portion 131a from the storage position, it can be taken out to the use position.

As shown in FIGS. 44 and 45, when the hook bar 131 is pulled out to the use position, the intermediate portion 131b extends rearward from the tip of the support portion 131a. By pulling out the hook bar 131 to the use position, the hooking portion 131c can be hooked on, for example, the end of a scaffold or a workbench, and the portable cutting machine 1 can be suspended.

Also in the seventh embodiment, the hooking portion 131c of the hook bar 131 is folded back in a J shape and directed toward the center of gravity G of the portable cutting machine 1 in the use position. For this reason, the hook bar 131 is hooked by locating the part to be hooked between the hooking part 131c and the support part 131a, and the tip part 131cc of the hooking part 131c is abutted against the upper surface of the workbench D or the scaffolding. The portable cutting machine 1 can be stably suspended even in a state where the portable cutting machine 1 is suspended (see FIG. 33).

In addition, since the hanging hook 130 according to the seventh embodiment is provided at the rear portion of the handle portion 23, it does not interfere with visual observation of the cut portion during the cutting work, and the work of the portable cutting machine 1 is facilitated. without compromising sexuality.

In the first to seventh embodiments described above, a circular saw that performs cutting by rotating a circular cutting tool is exemplified as the portable cutting machine 1, but a jigsaw that performs cutting by reciprocating a strip-shaped blade. It is possible to apply the suspension hooks and strap joints exemplified for other forms of cutting machines such as.

W... Cutting material 1... Portable cutting machine 10... Base 11... Lighting fixture 12... Movable cover 13... Cutting tool fixing screw 20... Cutting machine main body 21... Electric motor 21a... Motor housing 21b... Stator 21c... Rotor 21d... Motor shaft 21e Cooling fan 21f Suction hole 22 Rotary blade 23 Handle portion 23L Left handle housing 23R Right handle housing J Butting portion 23a Front portion 23b Grip portion 23c End portion 24 Fixed cover 24a Fixed screw 24b Arrow (rotating direction of rotary cutting tool 22) 24c Lid 25 Reduction gear 25a Gear housing 25b Support arm 26 Vertical swing support 26a Vertical Swing support shaft 27 Depth guide 28 Fixed lever 29 Fixed screw shaft 29a Fixed nut 30 Battery mounting portion 31 Battery pack 32 Output shafts 33, 34 Mounting flange 35 Controller housing portion 36 Controller 37 ...screwed portion 38...switch lever 39...main switch 40...joint portion 41...suspension tool (first embodiment)
42... Coupling hole 42a... Wall portion 43... Notification member 50... Suspension hook (first embodiment)
51 Hook bar 51a Support portion 51b Intermediate portion 51c Hook portion 51cc Tip end portion 51d Positioning projection 51e Hook projection 51f Engaging pin 52 Hook support portion 52a Mounting screw 52b Support cylinder portion 52c, 52d Engagement groove portion 61 Rotary blade 62 Fixed cover 63 Vertical swing support portion 63a Vertical swing support shaft 64 Front support portion 65 Rear support portion 66 Controller 67 ... Controller accommodating portion 68 ... Front grip portion 70 ... Coupling portion 71 ... Suspension tool (second embodiment)
72... Coupling hole 72a... Opening (upper side), 72b... Opening (lower side), 72c... Wall part, 72d... Notch part 73... Notification member 73a... Hook part, 73b... Engagement part, 73c... Leg part, 73d... Support portion 74... Engagement portion 80... Suspension hook (second embodiment)
81 Hook bar 81a Support portion 81b Intermediate portion 81c Hook portion 81cc Tip portion 81d Hook protrusion 81e Engagement pin 82 Hook support portion 82a Mounting screw 82b Support cylinder portion 91 ... Suspension hook (third embodiment)
92 Hook bar 92a Support portion 92b Intermediate portion 92c Hook portion 92cc Tip end portion 92d Hook protrusion 92e Spindle portion 93 Hook support portion 93a Support cylindrical portion 93b Insertion hole ( large diameter), 93c... insertion hole (small diameter)
93d... Engagement groove (deep) 93e... Engagement groove (shallow) 93f... Attachment part 94... Attachment screw 95... Engagement pin 96... Compression spring 100... Suspension hook (fourth embodiment)
DESCRIPTION OF SYMBOLS 101... Hook bar 101a... Support part 101b... Intermediate part 101c... Hooking part 101cc... Tip part 101d... Hooking protrusion 102... Hook supporting part 102a... Engagement groove part 103... Engagement pin 104... Base part 105... Fixing screw S... Virtual plane G... Center of gravity 110... Suspension hook (fifth embodiment)
111 Hook bar 111a Support portion 111b Intermediate portion 111c Hook portion 111cc Tip end portion 111d Hook projection 112 Hook support portion 112a Engagement groove portion 113 Fixing screw 114 Engagement pin 120 Suspension hook (sixth embodiment)
Reference numerals 121: hook bar 121a: support portion 121b: intermediate portion 121c: hooking portion 121cc: tip portion 121d: hooking protrusion 122: hook supporting portion 122a: engagement groove portion 123: base portion 124: fixing screw 125: engagement Coupling pin 130...Suspension hook (seventh embodiment)
131 Hook bar 131a Support portion 131b Intermediate portion 131c Hooking portion 131cc Tip 131d Hooking protrusion 132 Hook supporting portion 132a Engagement groove 133 Fixing screw 134 Base 135 Engagement dowel pin

Claims (4)

A portable cutting machine that cuts a cutting material by cutting a cutting tool driven by an electric motor,
A cutting machine main body supported on the upper surface side of the base is provided, and the cutting machine main body includes the electric motor and the cutting tool. It is configured to protrude to the side and cut into the cutting material,
The cutting machine main body is supported on the upper surface side of the base via a vertical swing support portion at the front so as to be able to swing vertically, so that the amount of protrusion of the cutting tool toward the lower surface side of the base can be changed. and
The front part of the cutting machine body is provided with a support arm for the vertical swing support part,
A hook for hanging is provided in front of the fixed cover that covers the periphery of the cutting tool and on the upper surface of the support arm of the vertical swing support,
The hook can be rotated about the left-right horizontal axis to change its position between a retracted position in which it extends rearward and obliquely upward, and a use position in which it projects forward along the upper surface of the base. for cutting machine. A portable cutting machine according to claim 1,
A portable cutting machine in which the position-changeable range of the hook is regulated on the upper surface side of the base. The portable cutting machine according to claim 1 or 2,
The portable cutting machine, wherein the storage position and the use position are set at an angle of 120° around the left-right axis. A portable cutting machine according to any one of claims 1 to 3 ,
The hook has a hook bar for suspension, the hook bar has a J shape having a support portion, an intermediate portion and a hook portion,
The use position of the hook bar is a posture in which the center of gravity of the portable cutting machine is positioned on a virtual plane including the support portion, the intermediate portion, and the hook portion, and the hook portion extends toward the center of gravity. A portable cutting machine configured to:

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