Operating machinery

Abstract

The present invention provides an operating machine with improved operability. In a cutting tool (10), a metal protective member (70) is arranged inside a chip discharge passage portion (64), and the bottom wall of the chip discharge passage portion (64) on the saw blade (12) side is covered by the protective member (70). That is, the bottom surface of the chip discharge passage portion (64) is protected by the metal protective member (70). Therefore, the protective member (70) can prevent high-temperature metal sheets from directly contacting the bottom wall of the chip discharge passage portion (64). As a result, deformation of the chip discharge passage portion (64) when chips pass through the chip discharge passage portion (64) can be suppressed. Therefore, the durability of the saw cover (60) can be improved, and the operability of the cutting tool (10) can be improved.

Description

Technical Field

[0001] The invention relates to a working machine. Background Art

[0002] Patent Document 1 below describes a portable circular saw (working machine) including a dust box. The dust box is disposed on the side of a saw cover covering a circular saw blade, and is configured to store chips generated when the portable circular saw is operated in the dust box.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: 2011-68073 Publication Summary of the invention

[0006] Problems to be solved by the invention

[0007] Here, when the material processed by the portable circular saw is a metal such as soft steel, the chips generated during the cutting process sometimes harden and become high temperature. Therefore, when the chips come into contact with a part of the portable circular saw, there is a risk that the contact part will be affected by the momentum of the chips or the heat of the chips. For example, the saw cover or the dust box may be damaged or thermally deformed by the chips. When a part of the saw cover covering the space for driving the circular saw blade is deformed and protrudes into the space for rotating the circular saw blade, there is a risk that the workability is reduced due to the interference between the deformed part of the saw cover and the part of the rotating circular saw blade. In addition, when the inside of the space for the chips to pass or collect the chips is deformed, there is a risk that the workability is reduced due to the increased possibility of the chips adhering to the inner wall of the space, or the chips cannot be passed or collected normally. Therefore, in the operating machine, it is ideal to be configured so that deformation caused by chips is not easy to occur. In addition, due to the adhesion / accumulation of chips in a specified position, the visual recognition is deteriorated or the normal operation of the movable parts is hindered, thereby reducing the workability.

[0008] In view of the above-mentioned facts, an object of the present invention is to provide a working machine capable of suppressing a decrease in workability due to processed pieces generated during work.

[0009] Technical means of solving problems

[0010] One or more embodiments of the present invention are a working machine, comprising: a motor for driving a top tool; a cover for covering at least a portion of the top tool; a discharge passage portion, which is arranged in the cover and is used to discharge processed sheets generated when the top tool is used for processing; and a protective member, which is located in the discharge passage portion and covers the wall portion on the top tool side in the discharge passage portion.

[0011] One or more embodiments of the present invention is a working machine, wherein a dust box is mounted on the cover, and the dust box accumulates the processed pieces discharged from the discharge passage portion.

[0012] One or more embodiments of the present invention is a working machine, wherein the exhaust passage portion has: an inlet portion, which is open to the top tool side; and an outlet portion, which is open to the dust box side, and the protective member is arranged in the path from the inlet portion to the outlet portion.

[0013] One or more embodiments of the present invention are a working machine, wherein the dust box includes the following components: a first housing, which is adjacently arranged to the cover; and a second housing, which covers the first housing from the side opposite to the cover; the first housing is made of metal, and the second housing is made of a transparent material.

[0014] One or more embodiments of the present invention is a working machine, wherein the first housing is provided with a stopper that abuts against the processed pieces discharged from the discharge passage portion to the dust box.

[0015] One or more embodiments of the present invention provide a working machine in which a cover portion that covers a portion of an inner peripheral surface of the second housing is formed on the first housing.

[0016] One or more embodiments of the present invention is a working machine, wherein the cover portion covers at least a portion of an inner peripheral surface of a lower wall of the second housing.

[0017] One or more embodiments of the present invention is a working machine, wherein the second housing includes a resin material.

[0018] One or more embodiments of the present invention is a working machine in which a portion of the guard member extends further toward the dust box than the discharge passage portion.

[0019] One or more embodiments of the present invention are a working machine, wherein a guide wall is provided on the discharge passage portion, the guide wall guides the processing piece in flow toward the dust box side, and a guide cover covering at least a portion of the guide wall is provided on the protective member. One or more embodiments of the present invention are a working machine, wherein an inlet guide portion is provided on the protective member, the inlet guide portion inhibits the processing piece from leaving the inlet portion of the discharge passage portion. One or more embodiments of the present invention are a working machine, wherein the protective member is made of metal.

[0020] One or more embodiments of the present invention are a working machine having: a first space, which is a space where a top tool driven by a prime mover is located; a second space, which includes at least one of a passing space or a receiving space, wherein the passing space is for a processed piece generated by the work performed using the top tool to pass through, and the receiving space is used to collect the processed piece; and a partition, which partitions the first space and the second space, and a protective member is arranged in an area between the first space and the partition, or an area between the second space and the partition, or the partition. One or more embodiments of the present invention are a working machine, wherein the protective member has a property of being hard or having high heat resistance, or both, compared with the partition. One or more embodiments of the present invention are a working machine, wherein the protective member is arranged in the following manner, that is, arranged in an area between the first space and the partition and at least a part is exposed to the first space, or arranged in an area between the second space and the partition and at least a part is exposed to the second space. One or more embodiments of the present invention are a working machine, wherein the protective member is installed in the partition. One or more embodiments of the present invention provide a working machine including a cover covering at least a portion of the tip tool, wherein the partition portion is provided on the cover.

[0021] One or more embodiments of the present invention are a working machine, comprising: a motor for driving a top tool; a cover for covering at least the top tool from one side of the axial direction of the motor; a discharge passage portion, which is arranged on the cover and discharges the processed pieces generated during processing; and a dust box, which is arranged on one side of the axial direction of the motor relative to the cover and accumulates the processed pieces discharged from the discharge passage portion, and at least a part of the box-side facing portion of the dust box facing the cover in the axial direction of the motor is made of metal. One or more embodiments of the present invention are a working machine, wherein a cover-side facing portion facing the box-side facing portion is provided on the cover, and a ventilation hole for generating an air flow between the box-side facing portion and the cover-side facing portion is provided on the cover-side facing portion. One or more embodiments of the present invention are a working machine, wherein a plurality of ventilation holes are formed on the cover-side facing portion of the cover facing the dust box in the axial direction of the motor. One or more embodiments of the present invention are a working machine, wherein abutting ribs protruding toward the box side facing portion are formed on the cover side facing portion. One or more embodiments of the present invention are a working machine, wherein the cover side facing portion is formed into a semicircular fan shape having a relief portion open to the lower side when viewed from the axial direction of the motor, and the ventilation hole is arranged on the radial outer side of the relief portion. One or more embodiments of the present invention are a working machine, wherein a part of the box side facing portion constitutes the bottom of the interior of the dust box. One or more embodiments of the present invention are a working machine, wherein the dust box has an outer casing that covers the box side facing portion from the side opposite to the cover, and the outer casing is made of resin. One or more embodiments of the present invention are a working machine, wherein a loading and unloading button configured to engage with the cover is provided on the dust box, and the position of the loading and unloading button is determined by the box side facing portion. One or more embodiments of the present invention is a working machine, wherein a metal member is provided at a bottom portion inside the dust box, and the metal member is connected to the box-side facing portion.

[0022] Effects of the Invention

[0023] According to one or more embodiments of the present invention, heat resistance can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a side view showing the cutting tool of this embodiment when viewed from the right side.

[0025] Figure 2 yes Figure 1 The cut-off tool is shown in a side view as seen from the left side.

[0026] Figure 3 yes Figure 1 The cutting tool shown is a perspective view when viewed from the right side obliquely from the front.

[0027] Figure 4 It means that Figure 3 The cut-off tool shown is a perspective view of a state in which a dust box is removed from a tool body, when viewed from the right oblique front.

[0028] Figure 5 It means that Figure 3 The perspective view of the cutting tool shown is a state in which the duct is removed from the motor housing portion, as seen from the oblique front left side.

[0029] Figure 6 Yes means Figure 2 A cross-sectional view of the interior of the cutting tool shown, as viewed from above ( Figure 2 6-6 line cross-section diagram).

[0030] Figure 7 Yes means Figure 4 A perspective view showing the positional relationship between a saw cover and a saw blade of a cutting tool as viewed from the oblique left front.

[0031] Figure 8 yes Figure 7 The saw cover is shown in a cross-sectional view of the chip discharge passage portion when viewed from the right side.

[0032] Fig. 9 Observed from the front Figure 8 The sectional view of the interior of the chip discharge passage portion shown in FIG. Figure 8 9-9 line cross section).

[0033] Fig.10 (A) is Figure 1 A cross-sectional view of the dust box shown in FIG. 1 at the air inlet portion of the dust box when viewed from the front side ( Figure 1 10A-10A line cross-section diagram), Fig.10 (B) is Figure 1 A cross-sectional view of the dust box shown in FIG. 1 at the location of the attachment and detachment button when viewed from the front side ( Figure 1 10B-10B line cross-section diagram).

[0034] Fig.11 Yes means Figure 4 The illustrated protective member is a perspective view of the entirety of the protective member when viewed obliquely from the right front.

[0035] Fig.12 yes Figure 4 The dust box shown is an exploded perspective view when viewed from the left rear obliquely.

[0036] Fig.13 Yes means Fig.12 A perspective view showing the positional relationship between the inner casing of the dust box and the saw cover when viewed from the right oblique front.

[0037] Fig.14 This is a perspective view of a saw cover and a dust box attached to the saw cover according to a modification example, as viewed from the left front direction.

[0038] Fig.15 Viewed from the lower left rear Fig.14 The structure shown is a partially enlarged stereoscopic view.

[0039] Fig.16 It means from Fig.14 The structure shown is a three-dimensional view of the state after the saw cover and the inner casing are removed.

[0040] Fig.17 Yes means Fig.14 A perspective view of a portion of the structure shown in section.

[0041] Fig.18 It means from Fig.14 The structure shown is a three-dimensional view of the state after the outer casing is removed.

[0042] Explanation of symbols

[0043] 10: Cutting tools (working machinery)

[0044] 12: Saw blade (top tool)

[0045] 20: Tool body

[0046] 22: Pedestal

[0047] 22A: Tool insertion part

[0048] 24: Shell

[0049] 25: Main body shell

[0050] 25A: Shell side cover

[0051] 25B: Air Inlet

[0052] 25C: Opening

[0053] 26: Handle housing

[0054] 26A: Handle

[0055] 26B: Battery installation department

[0056] 27: Pipeline

[0057] 27A: Pipeline outlet

[0058] 30: Trigger

[0059] 31: Lock button

[0060] 40: Driving mechanism

[0061] 41: Motor

[0062] 42: Rotation axis

[0063] 42A: Small gear

[0064] 43: Rotor

[0065] 44: Stator

[0066] 44A: Stator holder

[0067] 45: Motor substrate

[0068] 46: Fan

[0069] 47: First motor bearing

[0070] 48: Second motor bearing

[0071] 50: Output shaft

[0072] 53: Washer

[0073] 55: Protective cover

[0074] 57: Control Department

[0075] 59: Battery Pack

[0076] 60: Saw cover (cover)

[0077] 61: Side cover wall

[0078] 61A: Cover side cutout

[0079] 61B: Hood side exhaust port

[0080] 61C: Button insert

[0081] 61D: First fixed hook

[0082] 61E: Throttling

[0083] 61F: First ventilation hole

[0084] 61G: Second ventilation hole

[0085] 61H: Abutment rib (rib)

[0086] 61J: Second fixed hook

[0087] 62: Peripheral cover wall

[0088] 63: Inner cover wall

[0089] 63A: Inclined wall (guide wall)

[0090] 64: Chip discharge passage (discharge passage)

[0091] 64A: Hood side inlet guide

[0092] 64B: Entrance

[0093] 64C: Export Department

[0094] 65: Hood side air intake

[0095] 70: Protective components

[0096] 71: Protective part body

[0097] 72: Guard side inclined wall (guide guard)

[0098] 73: Guard fixing part

[0099] 74: Guard side inlet guide (inlet guide)

[0100] 80: Dust box

[0101] 82: Outer casing (second casing)

[0102] 82A: Box side snap hook

[0103] 82B: Fixed boss

[0104] 82C: Air intake

[0105] 82D: Button storage part

[0106] 82E: snap-in slot

[0107] 82F: Inclined part of the casing

[0108] 82G: Installation Department

[0109] 82H: discharge hole

[0110] 84: Inner housing (first housing)

[0111] 84A: Fixing hole

[0112] 84B: Box entrance

[0113] 84C: Stop wall (stop part)

[0114] 84D: Button insertion slot

[0115] 84E: Box side exhaust port

[0116] 84F: Box bottom (cover)

[0117] 84G: Inclined part

[0118] 86: Loading and unloading button

[0119] 86A: Engagement protrusion

[0120] 86B: Button snap-on piece

[0121] 86C: Engaged hook

[0122] 88: Button spring

[0123] 90: Dust collector connection

[0124] 90A: Installation part

[0125] 90B: Connecting tube

[0126] 92: Hat

[0127] 160: Saw cover

[0128] 161: Side cover wall

[0129] 161E: Throttling Department

[0130] 161F: Ventilation holes

[0131] 161H: Abutment rib

[0132] 161J: Hook receiving part

[0133] 161K: small protrusion

[0134] 161L: Large protrusion

[0135] 162: Peripheral cover wall

[0136] 163: Inner cover wall

[0137] 164: Chip discharge passage

[0138] 164C: Export Department

[0139] 165: Hood side air intake

[0140] 170: Protective components

[0141] 177: Cover member

[0142] 177A: Covering

[0143] 177B: Claw

[0144] 178A: Hole

[0145] 178B: Base

[0146] 178C: Bending section

[0147] 178D: Claw

[0148] 180: Dust box

[0149] 180A: Chip receiving section (receiving section)

[0150] 182: Outer casing

[0151] 182C: Box side air intake

[0152] 182D: Fixed boss

[0153] 184: Inner casing

[0154] 184E: Box side exhaust port

[0155] 184F: Bottom of the box

[0156] 184G: Inclined part

[0157] 190: Dust collector connection

[0158] 190A: Installation

[0159] AR: Tool Containment Area

[0160] BL: Bolt

[0161] SC: Fixing screw

[0162] UP, FR, RH: Arrow DETAILED DESCRIPTION

[0163] Hereinafter, the cutting tool 10 as the working machine of the present embodiment will be described using the drawings. In addition, in the drawings, arrows UP, FR, and RH shown as appropriate respectively indicate the upper side, the front side, and the right side of the cutting tool 10. Moreover, in the following description, when the up-down, front-back, and left-right directions are used for description, unless otherwise specified, the up-down direction, the front-back direction, and the left-right direction of the cutting tool 10 are indicated.

[0164] The cutting tool 10 is configured as a tool for cutting a workpiece. Figure 1 to Figure 4 As shown, the cutting tool 10 is composed of the following components: a tool body 20 for cutting a workpiece; and a dust box 80 for storing chips generated during the processing. The structure of the tool body 20 will be described first, and then the structure of the dust box 80 will be described.

[0165] (About Tool Body 20) The tool body 20 is constituted by the following components: a base 22, a housing 24, a drive mechanism 40 and a control unit 57 accommodated in the housing 24, a battery pack 59, a saw cover 60 as a cover, and a guard member 70 as a protection member.

[0166] (About the base 22) The base 22 is formed into a substantially rectangular plate shape with the vertical direction being the plate thickness direction and the front-rear direction being the length direction. Furthermore, when the cutting tool 10 is used for processing, the base 22 is placed on the upper side of the workpiece so that the lower surface of the base 22 slides along the upper surface of the workpiece.

[0167] A tool insertion portion 22A for arranging a saw blade 12 as a top tool is formed through the left side of the base 22, and the tool insertion portion 22A is formed in a substantially rectangular hole shape with the front-rear direction as the length direction when viewed from above. Here, the saw blade 12 is formed in a substantially circular plate shape with the left-right direction as the plate thickness direction, and the center portion of the saw blade 12 is fixed to the output shaft 50 of the drive mechanism 40 described later in a manner that allows it to rotate integrally with the output shaft 50. Moreover, the saw blade 12 is arranged in the tool insertion portion 22A, the upper portion of the saw blade 12 protrudes upward from the base 22, and the lower end side portion of the saw blade 12 protrudes downward from the base 22.

[0168] (Regarding the housing 24) Figure 1 to Figure 6 As shown, the housing 24 forms the outer shell of the tool body 20 and is disposed above the base 22. The housing 24 includes a main body housing portion 25 accommodating a drive mechanism 40 described later, a handle housing portion 26 forming the upper portion of the housing 24, and a pipe 27.

[0169] The main body housing portion 25 is formed into a substantially bottomed cylindrical shape that is open to the right. A housing side cover portion 25A that protrudes radially outward is formed at the right end portion of the main body housing portion 25. The housing side cover portion 25A is formed into a substantially semicircular shape that protrudes upward when viewed from the right, and the outer periphery of the housing side cover portion 25A is bent to the left (see FIG. Figure 6 ). Furthermore, the front end and the rear end of the housing side cover portion 25A are connected to the base 22.

[0170] A plurality of air inlets 25B are formed through the front and rear corners at the left end of the main body case 25. The plurality of air inlets 25B are formed from the bottom wall (left end) of the main body case 25 to the front and rear side walls and are arranged at predetermined intervals in the vertical direction.

[0171] An opening 25C is formed through the front wall of the right end of the main body case portion 25 except for the case side cover portion 25A (see Figure 5 and Figure 6 ) The opening 25C is formed in a substantially rectangular shape when viewed from the front side, and is open to the front side.

[0172] The handle housing portion 26 is formed in a substantially D-shape which is hollow when viewed from the left side, and is arranged so as to cover the main body housing portion 25 from the upper side and the rear side, and is connected to the main body housing portion 25. The upper end portion of the handle housing portion 26 is configured as a handle portion 26A for the operator to hold, and the handle portion 26A is inclined downward toward the rear side when viewed from the side.

[0173] A trigger 30 is provided at the front end side portion of the handle portion 26A. The trigger 30 protrudes downward from the handle portion 26A and is configured to be operated to be pulled upward. In addition, a lock button 31 for locking the pulling operation of the trigger 30 is provided on the handle portion 26A, on the upper side of the trigger 30. Furthermore, a switch mechanism (not shown) is provided inside the handle portion 26A. The switch mechanism has a switch (not shown) operated by the trigger 30. The switch is electrically connected to the control portion 57 described later, and is configured to output an output signal corresponding to the operation state of the trigger 30 to the control portion 57.

[0174] The rear lower end of the handle housing 26 is configured as a battery mounting portion 26B for mounting a battery pack 59 described later. A connector (not shown) is provided on the battery mounting portion 26B, and the connector is electrically connected to a control unit 57 described later.

[0175] like Figure 5 and Figure 6 As shown in FIG. 1 , the duct 27 is formed as a whole in a substantially rectangular cylindrical shape with the left-right direction as the axial direction and the up-down direction as the longitudinal direction, and is fixed to the main body housing portion 25 in a manner of blocking the opening 25C of the main body housing portion 25 from the front side. The left end of the rear wall of the duct 27 is cut, and the interior of the duct 27 is connected to the interior of the main body housing portion 25 through the opening 25C and the cutout portion (see FIG. 1 ). Figure 6 ).

[0176] In addition, if Fig.10 As shown in (A), the duct 27 has a duct outlet portion 27A extending upward, and the duct outlet portion 27A is adjacently arranged on the outer peripheral side portion of the shell side cover portion 25A. Furthermore, the top end portion of the duct outlet portion 27A is bent to the right along the outer peripheral portion of the shell side cover portion 25A. In addition, the duct outlet portion 27A is formed in a substantially U-shape that is open to the shell side cover portion 25A side when viewed from its length direction.

[0177] (Regarding the driving mechanism 40) Figure 6 As shown, the drive mechanism 40 includes a motor 41 and an output shaft 50. The motor 41 is accommodated in the main body case portion 25. The motor 41 includes a rotating shaft 42, a rotor 43, and a stator 44. The motor 41 is an example of a prime mover in the present invention.

[0178] The rotating shaft 42 is arranged with the left-right direction as the axial direction. The left end of the rotating shaft 42 is rotatably supported by a first motor bearing 47 fixed to the main body housing portion 25, and the right side of the rotating shaft 42 is rotatably supported by a second motor bearing 48 fixed to the main body housing portion 25. The right end of the rotating shaft 42 protrudes to the right from the second motor bearing 48, and a pinion 42A is formed at the right end of the rotating shaft 42.

[0179] The rotor 43 is formed in a substantially cylindrical shape with the left-right direction as the axial direction, is arranged on the radially outer side of the rotating shaft 42, and is configured to be able to rotate integrally with the rotating shaft 42. The stator 44 is formed in a substantially cylindrical shape with the front-rear direction as the axial direction, and is supported on the main body housing portion 25 on the radially outer side of the rotor 43. The stator 44 has a stator holder 44A, and a stator coil (not shown) is wound on the stator holder 44A. A motor substrate 45 is fixed to the left end of the stator holder 44A, and the stator coil is connected to the motor substrate 45. In addition, the motor substrate 45 is electrically connected to the control unit 57 described later through a wire not shown.

[0180] A fan 46 is provided on the right side of the rotating shaft 42 and on the left side of the second motor bearing 48 so as to be integrally rotatable. The fan 46 is configured as a centrifugal fan. Specifically, the air flows from the air inlet 25B of the main body housing portion 25 into the main body housing portion 25 by the air flow generated by the fan 46, and the air flows out from the opening 25C of the main body housing portion 25 into the duct 27. In addition, the air flowing into the duct 27 is exhausted from the duct outlet 27A.

[0181] The output shaft 50 is arranged inside the main housing portion 25 with the left-right direction as the axial direction. Specifically, the output shaft 50 is arranged below the right end (one end in the axial direction) of the rotating shaft 42 of the motor 41 and slightly behind the rotating shaft 42, and is rotatably supported by the main housing portion 25. At the left end of the output shaft 50, an output gear (not shown) is provided in a manner that can rotate integrally.

[0182] Furthermore, a transmission gear (speed reduction mechanism) not shown in the figure is provided between the rotating shaft 42 and the output shaft 50. The transmission gear is configured as a two-speed gear, and meshes with the pinion 42A of the rotating shaft 42 and the output gear of the output shaft 50. In addition, the right end portion of the output shaft 50 is configured as a tool mounting portion, and the tool mounting portion is arranged in the housing side cover portion 25A. In addition, the tool mounting portion is formed in a substantially cylindrical shape open to the right side, and an external thread is formed on the inner circumference of the tool mounting portion. Moreover, the center portion of the saw blade 12 is externally inserted into the tool mounting portion via a washer 53, and the saw blade 12 is fixed to the right end portion of the output shaft 50 by a bolt BL. Thus, when the motor 41 is driven, the output shaft 50 and the saw blade 12 rotate to one side ( Figure 1 (in the direction of arrow A).

[0183] In addition, if Figure 1 to Figure 4 As shown in FIG. 1 , the lower portion of the saw blade 12 is covered by a protective cover 55. The protective cover 55 is formed into a substantially semicircular shape that is convex toward the lower side when viewed from the right side, and is formed into a concave shape that is open toward the upper side. In addition, the protective cover 55 is connected to the output shaft 50 in a manner that can rotate around the axis of the output shaft 50 (see FIG. 1 ). Figure 6 ). Furthermore, the protective cover 55 is biased around the axis of the output shaft 50 by a biasing spring (not shown) and is held in the Figure 1 to Figure 4 The protective cover 55 is configured so that when the cutting tool 10 is used for cutting, the protective cover 55 overcomes the biasing force of the biasing spring by the workpiece and rotates to the other side around the axis of the output shaft 50, thereby exposing the blade of the saw blade 12. Fig.10 (B) schematically shows the position of the protection cover 55 during the cutting process. A first ventilation hole 61F is provided in a portion of the side cover wall 61 that faces the right side surface of the protection cover 55 during the cutting process.

[0184] (Regarding the control unit 57) Figure 2 As shown, the control unit 57 is accommodated in the front end of the battery installation part 26B of the handle housing part. The switch mechanism of the trigger 30 and the motor 41 are electrically connected to the control unit 57. Thus, by pulling the trigger 30, the motor 41 is driven, and the saw blade 12 rotates around the axis of the output shaft 50.

[0185] (About the battery pack 59) The battery pack 59 is formed into a substantially rectangular parallelepiped. And the battery pack 59 is installed in the battery installation part 26B of the cutting tool 10 from the rear side. Furthermore, the battery pack 59 has a connector not shown, and it is configured so that when the battery pack 59 is installed, the connector is connected to the connector of the handle housing part 26, and power is supplied from the battery pack 59 to the control part 57 described later.

[0186] (Regarding saw cover 60) Figures 3 to 10As shown, the saw cover 60 includes a resin material. The saw cover 60 is transparent. In addition, the saw cover 60 only needs to be transparent to the extent that the interior can be visually identified, and only needs to have a certain degree of light transmittance. The saw cover 60 is adjacent to the right side of the shell side cover portion 25A of the main shell portion 25, and is configured as a cover portion that covers the saw blade 12 from the upper side and the right side. Specifically, the saw cover 60 includes the following components: a side cover wall 61 as a cover side facing portion, which is in a roughly semicircular fan-shaped plate shape with the left-right direction as the plate thickness direction and open to the lower side; and an outer peripheral cover wall 62, which extends to the right side from the outer peripheral end of the side cover wall 61. Moreover, the side cover wall 61 is configured as a wall portion that covers the upper part of the saw blade 12 from the right side (one side of the axial direction of the motor 41), and the outer peripheral cover wall 62 is configured as a wall portion that covers the upper part of the saw blade 12 from the radial outside. In addition, the outer peripheral cover wall 62 is adjacently arranged on the right side of the housing side cover portion 25A, the outer peripheral portion of the side cover wall 61 is fastened to the housing side cover portion 25A, and the saw cover 60 is fixed to the main housing portion 25. Thus, the saw cover 60 and the housing side cover portion 25A form a tool storage area AR open to the bottom (see Figure 6 ), the upper part of the saw blade 12 is arranged in the tool storage area AR. The right side of the tool storage area AR is covered by a saw cover 60, but since the saw cover 60 is transparent, the interior of the tool storage area AR can be visually identified from the right side.

[0187] like Figure 4 As shown, a cover side cutout portion 61A is formed as a relief portion at the middle portion in the front-rear direction at the lower end portion of the side cover wall 61, and the cover side cutout portion 61A is formed in a substantially semicircular shape that is open to the lower side when viewed from the side. Moreover, it is configured so that when the dust box 80 described later is removed from the tool body 20, the bolt BL screwed to the output shaft 50 is exposed to the right side through the cover side cutout portion 61A.

[0188] like Figure 7As shown, an inner cover wall 63 is formed between the outer cover wall 62 and the saw blade 12 at the upper portion of the left surface of the side cover wall 61. The inner cover wall 63 is formed in a substantially long strip shape along the circumference of the saw blade 12 with the radial direction of the saw blade 12 as the plate thickness direction and the front-to-back direction as the length direction, and protrudes to the left from the side cover wall 61. That is, when viewed from the left side, the inner cover wall 63 extends along the circumference of the saw blade 12. Thus, the inner cover wall 63 is configured to cover the saw blade 12 from the upper side. In more detail, it is configured so that when the cutting tool 10 is operated, the protective cover 55 rotates radially inside the inner cover wall 63. In addition, the saw blade 12 is configured to be driven to rotate radially inside the inner cover wall 63. The inner cover wall 63 divides (partitions) the interior of the saw cover 60 into a space where the saw blade 12 is located and driven to rotate, that is, a drive space (first space) and a non-drive space that is not the case. That is, the area radially inward of the inner cover wall 63 is the driving space (first space), and the area radially outward of the inner cover wall 63 is the non-driving space. In addition, the inner cover wall 63 has a portion protruding to the left more than the outer cover wall 62 and the saw blade 12. The inner cover wall 63 is an example of a partition in the present invention. The tool storage area AR is the driving space or the first space in the present invention. The saw blade 12 is located in the tool storage area AR (first space). The protective cover 55 is located in the tool storage area AR (first space).

[0189] like Figure 8 to Figure 10 As shown in (A), an inclined wall 63A serving as a guide wall is formed on the upper surface of the front end of the inner cover wall 63. The inclined wall 63A is inclined from the front left end of the inner cover wall 63 toward the rear end side of the inner cover wall 63 (the rotation direction side of the saw blade 12). Figure 1 The saw cover 60 is provided with a chip discharge passage portion 64 as a discharge passage portion surrounded by the inner cover wall 63, the inclined wall 63A and the outer cover wall 62. The inclined wall 63A provided on the inner cover wall 63 divides the non-driving space (the space radially outward than the inner cover wall 63) into a passing space (chip discharge passage portion 64) for chips to pass through and a non-passing space for chips not to pass through. The inclined wall 63A is an example of a dividing portion in the present invention. In addition, in the present embodiment, in order to partition the space within the chip discharge passage portion 64, a portion of the housing side cover portion 25A (main housing portion 25) is used as a side wall. That is, the chip discharge passage portion 64 is formed by a portion of the saw cover 60 and a portion of the main housing portion 25. The space in the chip discharge passage 64 may be divided into sections by only the saw cover 60, but in order to achieve the above Fig. 9The curved shape of the left side of the chip discharge passage portion 64 shown, i.e., the curved shape from the front to the rear, and the complex shape that is curved in a manner of bulging outward (left side) and then returning to the inner side (right side), is effectively formed by multiple parts of the chip discharge passage portion 64. The chip discharge passage portion 64 is an example of a passage space or a second space for chips (processed pieces) to pass through.

[0190] In addition, a cover-side inlet guide 64A is formed at the front right side portion of the inner cover wall 63 constituting the chip discharge passage portion 64 (see Figure 7 The cover side inlet guide 64A extends downward from the front end of the inner cover wall 63, is connected to the left surface of the side cover wall 61, and is arranged on the right side of the outer peripheral portion of the front end side of the saw blade 12. In addition, the space between the front end of the inner cover wall 63 and the outer peripheral cover wall 62 in the front-to-back direction constitutes the inlet portion 64B of the chip discharge passage portion 64 (see Figure 7 to Figure 9 ). Thus, the inlet portion 64B is opened to the lower side (the saw blade 12 side) through the cover side inlet guide 64A, and the chip discharge passage portion 64 is connected to the tool storage area AR through the inlet portion 64B. The inlet portion 64B is located outside the outer diameter of the circular saw blade 12. The inlet portion 64B is a part of the passage space for the chips (processed pieces) to pass through.

[0191] Furthermore, the chip discharge passage 64 is opened to the right. That is, a hole portion for opening the chip discharge passage 64 is formed in the side cover wall 61, and the hole portion is configured as an outlet portion 64C (see Fig. 9 and Fig.10 Thus, when the chips generated during the cutting process of the workpiece are rolled up by the saw blade 12 in the tool storage area AR, the rolled up chips are introduced into the chip discharge passage portion 64 from the inlet portion 64B and discharged to the right from the outlet portion 64C of the chip discharge passage portion 64.

[0192] A cover-side air inlet 65 is formed on the upper surface of the outer peripheral cover wall 62, at a position corresponding to the top end of the duct outlet 27A of the duct 27 and above the chip discharge passage 64. The cover-side air inlet 65 corresponds to the duct outlet 27A and is formed in a substantially U-shape that is open downward when viewed from the side, and both ends of the cover-side air inlet 65 in the longitudinal direction are connected to the outer peripheral cover wall 62. Moreover, the top end of the duct outlet 27A is adjacently arranged on the left side of the cover-side air inlet 65, and the interior of the duct outlet 27A is connected to the interior of the cover-side air inlet 65.

[0193] like Figure 4As shown, a cover side exhaust port 61B is formed through the upper end of the rear portion of the side cover wall 61. The cover side exhaust port 61B is arranged between the inner cover wall 63 and the outer peripheral cover wall 62 in the radial direction of the side cover wall 61, and is formed in the shape of an elongated hole along the circumference of the side cover wall 61 in a side view.

[0194] A button insertion portion 61C is formed at the upper end of the side cover wall 61 between the chip discharge passage portion 64 and the cover side exhaust port 61B, into which a portion of a mounting and dismounting button 86 of the dust box 80 described later is inserted. The button insertion portion 61C is formed in a concave shape open to the right, and a first fixing hook 61D (see FIG. 6D ) protruding downward is formed at the upper edge of the button insertion portion 61C. Fig.10 (B)).

[0195] A throttle portion 61E is formed on the radially inner side of the side cover wall 61, which is one step lower to the left. The throttle portion 61E is formed in a semicircular arc shape extending along the circumferential direction of the side cover wall 61 when viewed from the side. In addition, a plurality of (five in this embodiment) first ventilation holes 61F (at the radially outer side of the throttle portion 61E) are formed through the side cover wall 61 as ventilation holes. Figure 4 In the figure, for convenience, only the first ventilation holes 61F on the rear side are denoted by reference numerals. The first ventilation holes 61F are formed in a substantially fan-shaped shape when viewed from the side, and are arranged along the circumferential direction of the side cover wall 61.

[0196] Furthermore, a plurality of (five in this embodiment) second ventilation holes 61G (at the throttle portion 61E) as ventilation holes are formed through the throttle portion 61E of the side cover wall 61. Figure 4 In the figure, for convenience, only the second ventilation holes 61G on the rear side are marked with reference numerals. Similar to the first ventilation holes 61F, the second ventilation holes 61G are formed to be substantially fan-shaped when viewed from the side, and are arranged along the circumferential direction of the side cover wall 61. In addition, the second ventilation holes 61G are arranged radially inward of the side cover wall 61 relative to the first ventilation holes 61F.

[0197] In addition, the side cover wall 61 has abutment ribs 61H formed on the radially outer side and the radially inner side of the side cover wall 61 relative to the first ventilation hole 61F. Figure 4 In the figure, for convenience, only a pair of abutting ribs 61H on the rear side are denoted by reference numerals. That is, ten abutting ribs 61H are formed on the side cover wall 61. The abutting ribs 61H extend along the circumferential direction of the throttle portion 61E in a side view and protrude to the right.

[0198] A pair of second front and rear fixing hooks 61J for fixing a dust box 80 described later is formed at the lower end of the side cover wall 61. The second fixing hook 61J is formed in a substantially L-shape when viewed from the front, protrudes rightward from the side cover wall 61, and extends in the front-rear direction.

[0199] (Regarding the protective member 70) Figure 4 , Figure 7 to Figure 10 (A) and Fig.11 As shown, the protective member 70 is arranged inside the chip discharge passage portion 64 of the saw cover 60, and is configured as a member for protecting the bottom wall (a portion of the upper surface of the inner cover wall 63) of the chip discharge passage portion 64. The protective member 70 is made of metal, and in this embodiment, it is made of aluminum. The protective member 70 has a protective member body 71, and the protective member body 71 is formed in a plate shape arranged in parallel with the inner cover wall 63. That is, when viewed from the side, the protective member body 71 is bent into a curved shape along the length direction of the inner cover wall 63. In addition, the protective member body 71 is formed in a roughly triangular shape in a manner similar to the bottom surface of the chip discharge passage portion 64 when viewed from the plate thickness direction of the inner cover wall 63, and is adjacently arranged on the upper side of the bottom surface of the chip discharge passage portion 64. That is, the right end of the protective member body 71 extends linearly in the front-to-back direction, and the left end of the protective member body 71 is inclined in a curved shape to the right side as it moves toward the rear side. The protective member 70 is an example of a protective member in the present invention.

[0200] In addition, the guard body 71 is configured to cover the bottom wall of the chip discharge passage portion 64 (through space) from the upper side, from the inlet portion 64B to the outlet portion 64C of the chip discharge passage portion 64. More specifically, the right end portion of the guard body 71 protrudes to the left from the outlet portion 64C of the chip discharge passage portion 64. That is, the guard body 71 protrudes to the left side (toward the dust box 80 described later) from the side cover wall 61 of the saw cover 60 (see FIG. 1 ). Fig.10 In other words, a portion of the inner cover wall 63 (partitioning portion) exposed inside the passage space (second space) through which the chips move and pass is covered by the guard body 71 as a protective member.

[0201] At the left end of the guard body 71, a guard side inclined wall 72 is integrally formed, which is bent upward and serves as a guide guard. That is, the guard side inclined wall 72 is inclined in a curved shape toward the right side as it moves toward the rear side, corresponding to the inclined wall 63A of the saw cover 60. In other words, the guard side inclined wall 72 is inclined toward the outlet 64C of the chip discharge passage portion 64 as it moves toward the rotation direction of the saw blade 12. Thus, the chips flowing into the chip discharge passage portion 64 are guided to the outlet 64C of the chip discharge passage portion 64 through the guard side inclined wall 72.

[0202] The rear end of the guard side inclined wall 72 is configured as a guard fixing portion 73, which is bent toward the rear side and protrudes toward the rear side more than the guard body 71. Moreover, the guard fixing portion 73 is arranged on the left side of the rear peripheral portion of the outlet portion 64C of the chip discharge passage portion 64, and is fixed to the side cover wall 61 by welding. In addition, the guard fixing portion 73 can also be fixed to the outlet portion 64C using a fixing member such as a screw. In the above manner, the guard member 70 is configured to guard and protect the bottom wall and the inclined wall 63A of the chip discharge passage portion 64 in the saw cover 60 from the inside.

[0203] In addition, a guard side inlet guide 74 is formed at the right side of the front end of the guard body 71 as an inlet guide portion that is bent downward. The guard side inlet guide 74 is arranged on the left side of the front end side peripheral portion of the saw blade 12. More specifically, the cover side inlet guide 64A of the saw cover 60 and the guard side inlet guide 74 are arranged in a manner that clamps the front end side peripheral portion of the saw blade 12 in the left-right direction (see Figure 7 ). At the lower position of the front end of the guard body 71, a part of the chips that want to flow backward hits the front surface of the cover side inlet guide 64A and the guard side inlet guide 74 and is restricted from moving, and at the same time, is transported to the side of the guard body 71 by the wind generated by the rotation of the saw blade 12. In this way, the cover side inlet guide 64A and the guard side inlet guide 74 have the following functions: to suppress the chips from flowing backward from the front end of the guard body 71, that is, to suppress the chips from leaving the inlet portion 64B to the rear, thereby improving the dust collection rate of the chips.

[0204] (About the dust box 80) Figure 3 to Figure 6 and Fig.12 As shown, the dust box 80 is detachably mounted on the saw cover 60 of the tool body 20 and is disposed on the right side of the saw cover 60. Moreover, the dust box 80 is configured to store the chips discharged from the chip discharge passage portion 64 of the saw cover 60. The dust box 80 includes the following components: an outer housing 82 (right side portion) as a second housing, an inner housing 84 (left side portion) as a box-side facing portion and a first housing, a loading and unloading button 86, and a dust collector connection portion 90. That is, the dust box 80 has a first wall portion (inner housing 84) on the saw blade 12 side (left side), and a second wall portion (outer housing 82) on the opposite side of the saw blade 12 (right side).

[0205] (About the outer casing 82) The outer casing 82 includes a resin material. In addition, the outer casing 82 is transparent. In addition, the outer casing 82 only needs to be transparent to the extent that the inside of the dust box 80 can be visually identified, and it only needs to be formed of a material that has a degree of permeability that allows the inside to be visually identified. The outer casing 82 is formed in a roughly rectangular box shape that is open to the left. At the left end portion of the lower wall of the outer casing 82, a pair of front and rear box side engaging hooks 82A are formed at a position corresponding to the second fixing hook 61J of the saw cover 60. The box side engaging hook 82A is formed in a rib shape with the left-right direction as the thickness direction and extending in the front-to-back direction, and protrudes downward from the outer casing 82. Moreover, the box side engaging hook 82A is inserted from the upper side between the second fixing hook 61J of the saw cover 60 and the side cover wall 61, and the second fixing hook 61J engages with the box side engaging hook 82A in the left-right direction, thereby mounting the lower end portion of the outer casing 82 on the saw cover 60 (refer to Fig.10 (A)). In addition, the upper end of the outer housing 82 is mounted on the saw cover 60 via a mounting and removal button 86 described later. Furthermore, when the outer housing 82 is mounted on the saw cover 60, the upper surface of the outer housing 82 is curved in a substantially arc shape in a side view so as to be flush with the upper surface of the saw cover 60.

[0206] like Fig.12 As shown in the figure, a plurality of (three in this embodiment) fixing bosses 82B for fixing the inner housing 84 described later are formed on the right wall of the outer housing 82. The fixing bosses 82B are formed in a substantially cylindrical shape with the left-right direction as the axial direction, and protrude to the left from the right wall of the outer housing 82. In addition, the fixing bosses 82B are respectively formed at the front end, rear end, and upper end of the outer housing 82.

[0207] A box-side air intake portion 82C is formed at a rear end portion of the upper wall of the outer housing 82 at a position corresponding to the hood-side air intake portion 65 of the saw hood 60. The box-side air intake portion 82C bulges upward relative to the upper wall of the outer housing 82, and is formed into a shape corresponding to the hood-side air intake portion 65. Moreover, the right end portion of the hood-side air intake portion 65 is connected to the left end portion of the box-side air intake portion 82C. Thus, the interior of the main housing portion 25 is connected to the interior of the dust box 80 via the duct 27 and the hood-side air intake portion 65 of the saw hood 60 (see FIG. 2 ). Fig.10 (A)).

[0208] A button receiving portion 82D for receiving a mounting and detaching button 86 described later is formed in the middle of the upper wall of the outer housing 82 in the front-back direction. The button receiving portion 82D is formed in a concave shape open to the upper side and the left side, and is arranged on the right side of the button insertion portion 61C of the saw cover 60. Engagement grooves 82E are formed in the middle of the upper-lower direction on the inner peripheral surfaces of the front and rear of the button receiving portion 82D. The engagement grooves 82E extend in the left-right direction, and the left end of the engagement grooves 82E is open to the left side.

[0209] The housing inclined portion 82F is formed at a corner between the lower wall and the right wall of the outer housing 82. The housing inclined portion 82F is inclined upward toward the right side when viewed from the front (see FIG. Fig.10 (A) and Fig.10 (B)). The outer surface of the casing inclined portion 82F is formed with a concavo-convex shape, so that the dust box 80 can be easily grasped and operated.

[0210] At the rear end of the outer casing 82, there is formed a mounting portion 82G for mounting a dust collector connection portion 90 described later. The mounting portion 82G is formed in a substantially rectangular cylindrical shape with the front-to-rear direction as the axial direction and the up-down direction as the longitudinal direction, and protrudes from the outer casing 82 to the rear side. In addition, the left portion of the mounting portion 82G protrudes to the left side than the outer casing 82. Furthermore, at the rear wall of the outer casing 82, there is formed a discharge hole 82H that connects the interior of the outer casing 82 with the interior of the mounting portion 82G. That is, the dust box 80 has a first wall portion (inner casing 84) on the saw blade 12 side (left side) and a second wall portion (outer casing 82) on the anti-saw blade 12 side (right side), but the portion not covered by these wall portions becomes the discharge hole 82H, and the discharge hole 82H is closed by the dust collector connection portion 90. As described later, the interior of the dust box 80 functions as a space for collecting chips. That is, the dust box 80 has a chip storage portion 80A for storing chips. The interior of the dust box 80 (chip storage portion 80A) is a storage space for collecting chips, and is an example of a space (second space) for chips to pass through or collect chips.

[0211] (Regarding the inner housing 84) Fig.12 and Fig.13 As shown, the inner housing 84 includes a metal plate. The inner housing 84 is arranged with the left and right directions as the plate thickness direction, and is formed so that when viewed from the right side, the outer shape of the inner housing 84 is similar to the outer shape of the outer housing 82. That is, the upper end of the inner housing 84 is bent into an arc shape that protrudes upward. In the inner housing 84, a fixing hole 84A is formed through the position corresponding to the fixing boss 82B of the outer housing 82. Moreover, the fixing screw SC is inserted into the fixing hole 84A from the left side and screwed with the fixing boss 82B, and the inner housing 84 is fixed to the outer housing 82. In addition, when the inner housing 84 is fixed to the outer housing 82, the inner housing 84 is arranged on the inner side of the opening of the outer housing 82, and the opening of the outer housing 82 is closed by the inner housing 84.

[0212] Furthermore, when the dust box 80 is mounted on the tool body 20, the inner housing 84 is disposed adjacent to the right side of the abutment rib 61H of the saw cover 60 (see FIG. 2 ). Fig.10 (A) and Fig.10 That is, the inner housing 84 is disposed on the right side of the side cover wall 61 of the saw cover 60 with a predetermined gap therebetween, and the side cover wall 61 and the inner housing 84 face each other in the left-right direction.

[0213] A box inlet 84B is formed at the upper outer peripheral portion of the front portion of the inner housing 84. The box inlet 84B is cut so as to be one step lower radially inward from the outer peripheral portion of the inner housing 84 when viewed from the right side, and the dust box 80 is connected to the chip discharge passage 64 of the saw cover 60 through the box inlet 84B. Thus, the chips discharged from the outlet 64C of the chip discharge passage 64 enter (are introduced) into the dust box 80.

[0214] A stopper wall 84C is formed as a stopper at the upper end of the inner housing 84, on the upper side of the rear end of the box inlet 84B. The stopper wall 84C is formed in a substantially rectangular plate shape that is bent to the right and has the front-rear direction as the plate thickness direction, and is arranged on one side (rotation direction side) of the circumference of the saw blade 12 relative to the chip discharge passage 64 when viewed from the side. Thus, the chips discharged from the outlet 64C of the chip discharge passage 64 to the right side and the rotation direction side of the saw blade 12 collide with the stopper wall 84C.

[0215] A button insertion groove 84D for inserting a mounting button 86 described later is formed at the upper end of the inner housing 84 behind the stopper wall 84C. The button insertion groove 84D is formed in a concave shape open to the upper side and is arranged on the right side of the button insertion portion 61C of the saw cover 60.

[0216] In addition, a plurality of (three in this embodiment) box-side exhaust ports 84E are formed through the upper outer peripheral portion of the rear portion of the inner housing 84. The box-side exhaust port 84E is arranged on the right side of the cover-side exhaust port 61B of the saw cover 60. Thus, the interior of the dust box 80 is connected to the tool storage area AR through the cover-side exhaust port 61B and the box-side exhaust port 84E. Moreover, in this embodiment, when the cutting tool 10 is working, the following air flow is generated by the rotation of the fan 46 of the motor 41. That is, it is configured so that air flows from the air inlet 25B of the main body shell portion 25 into the duct 27, and the air in the duct 27 flows into the dust box 80 through the duct outlet portion 27A and the cover-side air inlet portion 65 of the saw cover 60, and the air in the dust box 80 is exhausted into the tool storage area AR through the box-side exhaust port 84E and the cover-side exhaust port 61B. Thus, it is configured so that the inner housing 84 is cooled by the air flow generated by the rotation of the fan 46.

[0217] like Fig.10 (A) and Fig.10As shown in (B), a box bottom 84F as a cover portion that is bent to the right is formed at the lower end of the inner casing 84, and the box bottom 84F extends in the front-to-back direction and is adjacently arranged on the upper side of the lower wall of the outer casing 82. Thus, the box bottom 84F constitutes the bottom of the interior of the dust box 80. In addition, at the top end of the box bottom 84F, an inclined portion 84G corresponding to the casing inclined portion 82F of the outer casing 82 is formed. The inclined portion 84G is inclined toward the upper side as it moves toward the right side when viewed from the front side, and is adjacently arranged on the upper side of the casing inclined portion 82F of the outer casing 82. The box bottom 84F is made by bending a part of the inner casing 84, and forms a structure integral with the inner casing 84, but can also be configured as a structure formed as a separate structure from the inner casing 84 and connected to each other in the dust box 80. The box bottom 84F is a portion that extends from the inner casing 84 and becomes a part of the bottom of the interior of the dust box 80.

[0218] (Regarding the loading and unloading button 86) Fig.10 (B) and Fig.12 As shown in the figure, the loading and unloading button 86 is formed in a generally rectangular box shape that is open to the bottom, and is arranged in the button receiving portion 82D of the outer housing 82. A pair of left and right engaging protrusions 86A are formed at the lower end portions of the front and rear surfaces of the loading and unloading button 86, respectively. That is, the loading and unloading button 86 is formed with four engaging protrusions 86A. Moreover, the engaging protrusions 86A are inserted into the engaging grooves 82E of the outer housing 82. A part of the left side surface of the loading and unloading button 86 is in a positional relationship facing a part of the right side surface of the inner housing 84, so that the movement of the loading and unloading button 86 in the left direction is restricted by the inner housing 84.

[0219] In addition, a button spring 88 is disposed inside the mounting and dismounting button 86 (see Fig.10 (B)). The button spring 88 is configured as a compression coil spring, the upper end of the button spring 88 is locked to the upper wall of the mounting button 86, and the lower end of the button spring 88 is locked to the lower wall of the button housing portion 82D. As a result, the mounting button 86 is urged upward by the button spring 88, and the engaging protrusion 86A abuts against the upper surface of the engaging groove 82E. Therefore, the mounting button 86 is configured to be able to be pressed downward.

[0220] In addition, a button engaging piece 86B is formed on the loading and unloading button 86. The button engaging piece 86B protrudes to the left from the lower end of the loading and unloading button 86 with the up-down direction being the plate thickness direction. Specifically, the button engaging piece 86B is inserted into the button insertion groove 84D of the inner housing 84, and the top end of the button engaging piece 86B is inserted into the button insertion portion 61C of the saw cover 60. The width dimension (dimension in the front-to-back direction) of the button engaging piece 86B is set to be slightly smaller than the width dimension of the button insertion groove 84D. Thus, the position of the loading and unloading button 86 in the front-to-back direction is determined by the button insertion groove 84D of the inner housing 84. That is, the movement of the loading and unloading button 86 in the front-to-back direction and the left direction is restricted by the inner housing 84.

[0221] Furthermore, a hook portion 86C protruding upward is formed at the top end of the button engagement piece 86B. The hook portion 86C is disposed adjacent to the left side of the first fixed hook 61D of the saw cover 60, and the hook portion 86C is engaged with the first fixed hook 61D in the left-right direction. Thus, the upper end of the dust box 80 is restricted from moving to the right. Moreover, by pressing the attachment and detachment button 86 downward, the engagement state between the hook portion 86C and the first fixed hook 61D is released. Thus, the dust box 80 can be removed from the tool body 20.

[0222] (About the dust collector connection part 90) Figure 1 , Figure 3 , Figure 4 , Figure 6 and Fig.12 As shown, the dust collector connection part 90 includes the following components: a mounted portion 90A, which constitutes the front portion of the dust collector connection part 90; and a connecting cylinder 90B, which constitutes the rear portion of the dust collector connection part 90. The mounted portion 90A is formed into a substantially rectangular box shape open to the front side. Moreover, the mounted portion 90A is connected to the mounting portion 82G in a manner that closes the mounting portion 82G of the outer housing 82. Specifically, the upper end portion of the mounted portion 90A is connected to the upper end portion of the mounting portion 82G of the outer housing 82 in a rotatable manner with the left-right direction as the axial direction.

[0223] The connecting cylinder 90B is formed into a generally cylindrical shape with the front-rear direction as the axial direction, and protrudes from the installed portion 90A to the rear side. In addition, the interior of the connecting cylinder 90B is communicated with the interior of the installed portion 90A. Moreover, it is configured so that a hose of a dust collector not shown is connected to the rear end of the connecting cylinder 90B. Thus, it is configured so that the chips of the dust box 80 are sucked by the dust collector and discharged to the outside of the dust box 80. In addition, when the hose of the dust collector is not connected to the connecting cylinder 90B, a bottomed cylindrical cap 92 is installed on the connecting cylinder 90B.

[0224] (Operation and Effect) Next, the operation and effect of the cutting tool 10 of this embodiment will be described.

[0225] When using the cutting tool 10 constructed as described above, the base 22 is placed on the workpiece, and the trigger 30 is pulled. As a result, the motor 41 is driven, and the driving force of the motor 41 is transmitted to the saw blade 12, and the saw blade 12 rotates to one side around the axis of the output shaft 50. Then, the cutting tool 10 is moved forward, thereby performing a cutting process on the workpiece.

[0226] In addition, when the workpiece is cut, the chips generated by the cutting process are rolled up due to the rotational force of the saw blade 12. Specifically, the chips are rolled up from the outer peripheral portion of the front end of the saw blade 12, and move toward the rotation direction of the saw blade 12 along the outer peripheral portion of the housing side cover portion 25A and the outer peripheral cover wall 62 of the saw cover 60. Therefore, the rolled-up chips are guided by the cover side inlet guide 64A of the saw cover 60 and the guard side inlet guide 74 of the guard member 70, and are inserted into the chip discharge passage portion 64 from the inlet portion 64B of the saw cover 60. The chips inserted into the chip discharge passage portion 64 are guided by the guard side inclined wall 72 of the guard member 70 toward the outlet portion 64C of the chip discharge passage portion 64, and are discharged from the outlet portion 64C.

[0227] In addition, when the chips are discharged from the outlet portion 64C, the chips are discharged in a manner that they fly out from the outlet portion 64C to the right side and in one of the directions of rotation of the saw blade 12 due to the rotational force of the saw blade 12. Therefore, the chips discharged from the outlet portion 64C collide with the stopper wall 84C of the inner housing 84 in the dust box 80, and the chips after the collision fall into the dust box 80. As a result, the chips are accumulated in the dust box 80.

[0228] However, when the workpiece is a metal material, the chips that become high-temperature metal pieces pass through the inside of the chip discharge passage portion 64 of the saw cover 60 and are discharged from the chip discharge passage portion 64 into the dust box 80. Moreover, when the chips pass through the chip discharge passage portion 64 of the saw cover 60, the chips abut against the bottom surface of the chip discharge passage portion 64 while passing from the inlet portion 64B to the outlet portion 64C of the chip discharge passage portion 64. Therefore, there is a possibility that the bottom wall of the chip discharge passage portion 64 (the upper surface of the inner cover wall 63) may be cut and deformed due to contact with the metal piece with momentum, or the bottom wall of the chip discharge passage portion 64 may be thermally deformed due to contact with the high-temperature chips. Moreover, there is a possibility that the side surface of the bottom wall of the chip discharge passage portion 64 on the saw blade 12 side (the lower surface of the inner cover wall 63) may also be deformed due to continuous contact with the chips, thereby affecting the rotation of the saw blade 12. In short, the partition (inner cover wall 63) between the first space and the second space may be deformed by the chips, thereby hindering the movement of the chips moving in the second space or affecting the movement of the saw blade 12 or the protective cover 55 in the first space.

[0229] Here, a metal protective member 70 is provided inside the chip discharge passage portion 64, and the bottom wall on the saw blade 12 side of the chip discharge passage portion 64 is covered by the protective member 70. That is, the bottom surface of the chip discharge passage portion 64 (the upper surface of the inner cover wall 63) is protected (guarded) by the metal protective member 70. The protective member 70 is provided in a manner exposed in the chip discharge passage portion 64. Therefore, the protective member 70 can prevent the high-temperature metal sheet from directly contacting (reaching) the bottom wall of the chip discharge passage portion 64. Thus, the deformation of the chip discharge passage portion 64 when the chips pass through the chip discharge passage portion 64 can be suppressed. Therefore, the durability of the saw cover 60 can be improved, and the operability of the cutting tool 10 can be improved. In the present embodiment, the protective member 70 is made of aluminum, but it can also be other metals with high durability (wear resistance, impact resistance, heat resistance) such as iron. In addition, the protective member 70 may not be made of metal, as long as it is harder (higher wear resistance and impact resistance) or higher heat resistance (melting point) than the inner cover wall 63 as a partition, or satisfies both of these properties. For example, the protective member 70 may be a member processed from carbon fiber, or may be a member / portion formed from a resin material reinforced by containing carbon fiber.

[0230] In addition, the chip discharge passage portion 64 is arranged radially outside the saw blade 12, and the protective cover 55 rotates between the saw blade 12 and the chip discharge passage portion 64 (inside the first space) when the cutting tool 10 is operated. Moreover, as described above, the wall portion (inner cover wall 63) of the chip discharge passage portion 64 on the saw blade 12 side can be suppressed from being deformed by the protective member 70. Thus, the rotation of the protective cover 55 can be suppressed from being hindered by the deformation of the bottom wall of the chip discharge passage portion 64. Therefore, the operability of the cutting tool 10 can be well maintained.

[0231] In addition, a dust box 80 is detachably mounted on the right side of the saw cover 60, and a box inlet 84B is formed in the dust box 80 to communicate the inside of the chip discharge passage 64 with the inside of the dust box 80. Therefore, the chips discharged from the outlet 64C of the chip discharge passage 64 can be accumulated in the dust box 80 (chip storage portion 80A).

[0232] In addition, the guard body 71 of the guard member 70 covers the bottom wall of the chip discharge passage portion 64 from the inlet portion 64B to the outlet portion 64C of the chip discharge passage portion 64. Thus, deformation of the portion on the outlet portion 64C side of the chip discharge passage portion 64 can be suppressed. That is, deformation of the portion on the dust box 80 side of the chip discharge passage portion 64 can be suppressed. Thus, obstruction of the installation of the dust box 80 to the saw cover 60 due to deformation of the chip discharge passage portion 64 can be suppressed. In addition, a portion of the guard body 71 extends to the position of the inner housing 84 in a manner that passes over the right end portion of the bottom wall (the side wall on the saw blade 12 side) of the chip discharge passage portion 64, that is, the outlet portion 64C (refer to Fig. 9 and Fig.10 ). Thus, it is possible to suppress the chips discharged from the outlet portion 64C from entering the gap between the inner housing 84 and the side cover wall 61 formed by the rib 61H.

[0233] In addition, the guard member 70 is provided with a guard side inclined wall 72, which is inclined in a curved shape toward the right side as it moves toward the rotation direction of the saw blade 12. In other words, the guard side inclined wall 72 is inclined toward the outlet portion 64C of the chip discharge passage portion 64 as it moves toward the rotation direction of the saw blade 12. Thus, the chips inserted into the chip discharge passage portion 64 can be guided to the outlet portion 64C while ensuring durability through the guard side inclined wall 72. Therefore, the chips can be discharged well from the chip discharge passage portion 64.

[0234] In addition, the saw cover 60 is provided with a cover side inlet guide 64A extending downward from the front end of the chip discharge passage portion 64, and the guard side inlet guide 74 extending downward from the front end of the guard body 71 is formed in the guard member 70. The outer peripheral portion of the saw blade 12 is clamped in the left-right direction by the cover side inlet guide 64A and the guard side inlet guide 74. Thus, when cutting the workpiece, the chips rolled up by the saw blade 12 can be well introduced into the chip discharge passage portion 64 by the cover side inlet guide 64A and the guard side inlet guide 74.

[0235] In addition, the dust box 80 has an inner housing 84, which is adjacently arranged on the right side of the side cover wall 61 of the saw cover 60 and is made of metal. That is, the part of the dust box 80 on the side of the saw blade 12 is made of metal. As a result, thermal deformation of the dust box 80 can be suppressed, and the inner housing 84 can be cooled by the air flow generated when the saw blade 12 rotates. Therefore, the heat resistance of the dust box 80 can be improved. The side cover wall 61 is an example of a partition in the present invention, and is a member that separates the tool storage area AR (first space) and the chip storage part 80A (second space). Since the inner housing 84 as a protective member is provided between the chip storage part 80A (second space) and the side cover wall 61, deformation of the side cover wall 61 due to chips can be suppressed. Therefore, deformation of the side cover wall 61 and obstruction of the movement of the saw blade 12 or the protective cover 55 can be suppressed, so that workability can be improved. That is, the inner housing 84 is an example of a protective member. If the protective member 70 is a first protective member, the inner housing 84 is a second protective member.

[0236] In addition, the dust box 80 has an outer housing 82, which covers the inner housing 84 from the side opposite to the saw cover 60 (right side) and is made of a transparent material. Thus, the inside of the dust box 80 can be visually recognized through the outer housing 82, so that the amount or state of the chips accumulated in the dust box 80 can be confirmed. Therefore, the convenience for the operator can be improved.

[0237] In addition, a stopper wall 84C that bends to the right is provided in the inner housing 84 of the dust box 80, and the stopper wall 84C is arranged on the rear side of the box inlet portion 84B. That is, the stopper wall 84C is arranged inside the dust box 80, and is arranged on the rotation direction side (rear) of the saw blade 12 relative to the outlet portion 64C of the chip discharge passage portion 64 in the saw cover 60. As a result, the chips discharged from the outlet portion 64C of the chip discharge passage portion 64 to the right side and the rotation direction side of the saw blade 12 collide with the stopper wall 84C, and fall into the dust box 80 after the collision. Therefore, the chips discharged from the outlet portion 64C can be prevented from hitting the outer housing 82. Therefore, the thermal deformation of the outer housing 82 can be suppressed, and the heat resistance of the dust box 80 can be further improved.

[0238] In addition, at the lower end of the inner casing 84 of the dust box 80, a box bottom 84F is formed that is bent to the right, and the box bottom 84F covers the inner peripheral surface of the lower wall of the outer casing 82 from the upper side. That is, the box bottom 84F constitutes the bottom of the interior of the dust box 80 (the chip storage portion 80A). As a result, inside the dust box 80, the chips are stored on the box bottom 84F. That is, the chips accumulated inside the dust box 80 can be prevented from directly contacting the lower wall of the outer casing 82. In addition, since the box bottom 84F is connected to the inner casing 84 (the opposing part on the saw cover 60 side) having a large area, the heat of the chips accumulated at the bottom of the dust box 80 can be released from the box bottom 84F to the inner casing 84, thereby suppressing the temperature rise of the bottom and quickly cooling the accumulated chips. In addition, a large amount of heat can be quickly dissipated by setting the upper end position of the inner housing 84 higher than the upper end position of the saw blade 12. Therefore, thermal deformation of the outer housing 82 can be further suppressed, and the heat resistance of the dust box 80 can be further improved.

[0239] In addition, a plurality of first ventilation holes 61F and second ventilation holes 61G are formed in the side cover wall 61 of the saw cover 60. As a result, the air flow generated when the saw blade 12 rotates can pass through the inside of the first ventilation holes 61F and the second ventilation holes 61G and hit the inner casing 84 of the dust box 80. Therefore, the inner casing 84 can be cooled by the air flow. Therefore, the heat resistance of the dust box 80 can be effectively improved. In particular, since the inner casing 84 faces the area (first space) that accommodates the operating parts such as the saw blade 12 or the protective cover 55, for example, when the inner casing 84 or the side cover wall 61 is deformed by the heat of the chips accumulated inside the dust box 80, there is a possibility that the operating parts such as the saw blade 12 or the protective cover 55 may malfunction. However, according to the present embodiment, such a situation can be suppressed. In addition, if Fig.10 As shown in (B), the first ventilation hole 61F includes a member facing the area where the protective cover 55 operates. For example, when the chips are accumulated in the form of being sandwiched between the protective cover 55 and the side cover wall 61, there is a possibility of obstructing the movement of the protective cover 55, but the first ventilation hole 61F can suppress the accumulation of chips between the protective cover 55 and the side cover wall 61. That is, the chips that may be accumulated between the protective cover 55 and the side cover wall 61 are discharged to the outside of the tool storage area AR (first space) through the first ventilation hole 61F. Therefore, the movement of the protective cover 55 can be well maintained, thereby ensuring workability.

[0240] In addition, a plurality of abutment ribs 61H protruding to the right side (dust box 80 side) are formed on the side cover wall 61 of the saw cover 60. Specifically, the abutment ribs 61H are arranged on the radially outer side and radially inner side of the side cover wall 61 relative to the first ventilation hole 61F. Moreover, the inner casing 84 of the dust box 80 is adjacently arranged on the right side of the abutment ribs 61H. Therefore, a predetermined gap can be formed between the side cover wall 61 and the inner casing 84 in the left-right direction. In other words, the abutment ribs 61H restrict the side cover wall 61 from approaching the inner casing 84 to form a gap. As a result, the air passing through the first ventilation hole 61F can flow into the gap, thereby cooling the inner casing 84 more effectively. Therefore, the heat resistance of the dust box 80 can be more effectively improved. In addition, by providing the gap, the chips discharged from the first ventilation hole 61F can be discharged to the outside in a good manner.

[0241] In addition, a throttle portion 61E is formed on the side cover wall 61 of the saw cover 60, which is one level lower to the left side (the side opposite to the dust box 80), and a second ventilation hole 61G is formed in the throttle portion 61E. Therefore, a predetermined gap can be formed between the throttle portion 61E and the inner housing 84. As a result, the air passing through the second ventilation hole 61G can flow into the gap, thereby cooling the inner housing 84. Therefore, the heat resistance of the dust box 80 can be more effectively improved. The throttle portion 61E is located outside the area where the right side portion of the protective cover 55 operates, so a predetermined gap can be set between it and the inner housing 84.

[0242] In addition, the side cover wall 61 of the saw cover 60 is formed in a semicircular fan shape that is open to the bottom when viewed from the side, and a cover side cutout portion 61A that is open to the bottom is formed in the middle portion in the front-rear direction of the lower end of the side cover wall 61. In addition, when the dust box 80 is removed from the tool body 20, the bolt BL that fixes the saw blade 12 is exposed. Thus, the saw blade 12 can be replaced through the cover side cutout portion 61A.

[0243] In addition, the dust box 80 has a loading and unloading button 86 configured to be engageable with the saw cover 60. The loading and unloading button 86 is accommodated in the button accommodating portion 82D of the outer housing 82, and the button engaging piece 86B of the loading and unloading button 86 is inserted into the button insertion groove 84D of the inner housing 84. Moreover, the width dimension of the button insertion groove 84D is set to be slightly larger than the width dimension of the button engaging piece 86B. Thus, the position of the loading and unloading button 86 in the front-to-back direction can be determined by the inner housing 84. In addition, since the stopper wall 84C covers and protects the front wall that partitions the button accommodating portion 82D, it is possible to suppress the button accommodating portion 82D from being deformed, thereby preventing the loading and unloading button 86 from malfunctioning.

[0244] The above, based on Figures 1 to 13Although the described embodiments have explained the present invention, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the gist of the present invention.

[0245] The object of the present invention is to realize a working machine with good operability by ensuring durability. More specifically, the object is to suppress the deformation of the partition from causing adverse effects on the movement of movable parts such as the saw blade 12 or the protective cover 55, or on the movement of the chips. Therefore, the present invention is a working machine having: a first space (tool storage area AR) for accommodating the saw blade 12 or the protective cover 55; a second space, including at least one of a passing space (chip discharge passage 64) or a storage space (chip storage portion 80A), wherein the passing space is for the processing pieces generated by the operation performed using the saw blade 12 to pass through, and the storage space is used to collect the processing pieces; and a partition that separates the first space and the second space. In the working machine, it is sufficient as long as the protective member (protective member 70) is arranged in the area between the first space and the partition, or in the area or partition between the second space and the partition.

[0246] In the case where the protective member (protective member 70) is located in the area between the first space and the partition, since the protective member (protective member 70) is exposed in the first space, the processing piece from the first space can be suppressed from being deformed due to contact with the partition (the lower surface of the inner cover wall 63). In addition, even if the partition is deformed due to an external factor (impact or heat) that produces deformation from the second space side, the protective member can be used to suppress the partition from deforming in a manner that interferes with the first space. For example, even if the partition melts due to heat from the second space side, the movement of the melted partition is hindered by the protective member that maintains its shape, thereby suppressing the deformation of the partition from affecting the components operating in the first space. In this case, the partition and the protective member may or may not be in contact.

[0247] In addition, when the protective member (guard member 70) is located in the area between the second space and the partition, the processing piece moving in the second space does not directly contact the partition, so the deformation of the partition (the upper surface of the inner cover wall 63) can be directly suppressed. In this case, the partition and the protective member may or may not contact.

[0248] In addition, even when the protective member (protective member 70) is provided in the partition, deformation of the partition can be suppressed. The "provided" mentioned here includes not only the case where it is installed on the side of the partition, but also the case where it is formed integrally with the partition. For example, it includes a structure in which the protective member is integrally formed with the saw cover 60 in such a manner that the protective member is located at the inner center of the partition. In this case, the deformation force (impact or heat) applied from one of the first space and the second space to the other is suppressed inside the partition. Therefore, for example, even if the side of the partition facing the second space is melted by heat, the thermal deformation is suppressed in the middle of the partition, thereby suppressing deformation of the side of the partition facing the first space.

[0249] use Figure 13 to Figure 18 A modified example of the embodiment for implementing the present invention is described. In addition, compared with the above-described embodiment, the saw cover 60 and the dust box 80 are changed in the modified example, and the other parts are the same, so the description is omitted. In addition, in the modified example, for parts having the same functions as the above-described embodiment, the number after adding 100 is marked. For example, Fig.14 The side cover wall 161 described in Figure 4 The same functions as the side cover wall 61 described in etc. Hereinafter, description of the configuration having basically the same functions will be omitted, and description will be mainly focused on the contents with changes.

[0250] Fig.14 A diagram showing the state of the saw cover 160 in a modified example and the dust box 180 installed on the saw cover 160 as viewed from the left front direction. Similar to the above-described embodiment, the saw cover 160 is provided with a side cover wall 161, an outer cover wall 162, and an inner cover wall 163. The side cover wall 161 is provided with a ventilation hole 161F, a throttling portion 161E, and a hook receiving portion 161J. In the area between the outer cover wall 162 and the inner cover wall 163, a chip discharge passage portion 164 is provided in the front portion. A cover-side air intake portion 165 is provided in the front upper portion of the outer cover wall 162. A protective member 170 is provided in the front upper portion of the inner cover wall 163. The protective member 170 basically has the same structure as the protective member 70, but differs in that it does not have a protective member side inlet guide 74.

[0251] A dust box 180 is mounted on the right side of the saw cover 160. The left side of the dust box 180 is formed by an inner housing 184 as a (second) protective member. Fig.14 In the figure, a part of the inner housing 184 is visible through the ventilation hole 161F. A box-side air intake 182C is formed at the front upper part of the dust box 180 and communicates with the cover-side air intake 165.

[0252] Fig.15This is a partially enlarged view of the front portion of the inner cover wall 163 as viewed from the lower left rear. Fig.14 , Fig.15 As shown, a cover member 177 as a third protective member is provided at the front lower portion of the inner cover wall 163. The cover member 177 is a member that covers the lower surface of the inner cover wall 163 (partitioning portion) located between the space (first space) where the saw blade 12 is located and the chip discharge passage portion 164 (second space), and is a protective member for the area between the inner cover wall 163 (partitioning portion) and the space (first space) where the saw blade 12 is located. The cover member 177 has a covering portion 177A that covers the lower surface of the inner cover wall 163 and a claw portion 177B that engages with the left end of the inner cover wall 163. The cover member 177 is supported by the inner cover wall 163 (saw cover 160) by the claw portion 177B engaging with the inner cover wall 163. A large protrusion 161L that protrudes to the left is provided on the side cover wall 161 of the saw cover 160. Two large protrusions 161L are provided separately in the front-rear direction. A small protrusion 161K protruding to the left is provided on the side cover wall 161 of the saw cover 160. The small protrusion 161K is located between the two large protrusions 161L in the front-rear direction. The large protrusion 161L is configured to be able to contact with the lower surface of the cover member 177 or to be able to support the lower surface of the cover member 177, thereby preventing the cover member 177 from moving downward (position deviation). The small protrusion 161K engages with the cutout portion 177C of the cover member 177, thereby preventing the cover member 177 from moving in the left-right direction (position deviation).

[0253] Fig.16 is from Fig.14 FIG. 1 shows a state after the saw cover 160 is removed. A cover member 178 as a new (fourth) protective member is provided inside the outer housing 182 in the dust box 180 of the modified example. The cover member 178 includes a hole portion 178A provided at the rear, a base portion 178B, a bent portion 178C connected to the front upper portion of the base portion 178B, and a claw portion 178D for positioning. A fixing boss 182D is inserted through the hole portion 178A, and the cover member 178 is supported by the fixing boss 182D.

[0254] Fig.17 The image is cut by the planes passing through the rear part of the claw 178D from the upper right front. Fig.14 A partial enlarged view of the cross-section of Fig.17As shown, the claw portion 178D is clamped by the bottom of the fixed boss 182D and the inner housing 184, thereby supporting the cover member 178. The ventilation hole 161F faces the action area of ​​the protective cover (not shown), and dust is suppressed from accumulating between the protective cover and the side cover wall 161. The side cover wall 161 is provided with abutting ribs 161H. The abutting ribs 161H abut against the inner housing 184, thereby forming a predetermined gap (space) between the side cover wall 161 and the inner housing 184. The chips discharged from the ventilation hole 161F are discharged to the outside through the gap.

[0255] Fig.18 is from Fig.14 The state is a diagram excluding the outer housing 182 and viewed from the right front. Fig.18 In the figure, the cover member 178 supported on the outer casing 182 is shown as floating. The base 178B and the bent portion 178C of the cover member 178 partially face the outlet portion 164C (the right opening of the chip discharge passage portion 164), and are configured so that the chips discharged from the outlet portion 164C can abut against it. That is, the cover member 178 suppresses the chips from contacting a portion of the dust box 180 (the upper inner surface of the outer casing 182). Thus, a portion of the dust box 180 (the upper inner surface of the outer casing 182) is suppressed from being deformed by the chips. In addition, the cover member 178 is disposed in an area above the lower end of the outlet portion 164C and the lower end of the box-side exhaust port 184E. When the chips accumulated in the chip receiving section 180A are located above the lower end of the connecting passage (the outlet 164C, the box-side exhaust port 184E) that connects the receiving section 180A to the outside, there is a risk that the chips collected from the connecting passage will leak to the outside. Therefore, in the embodiment of the present invention, the outer housing 182 is made transparent, and the operator can work while confirming whether the top of the chips collected through the transparent outer housing 182 exceeds the lower end of the connecting passage. Therefore, the area below the lower end of the connecting passage (the outlet 164C, the box-side exhaust port 184E) in the chip receiving section 180A is used as the collecting space for the chips, and the area above is not necessary as a collecting space. Therefore, in this modified example, by providing a cover member 178, that is, a cover member 178 that covers the inner surface portion of the outer casing 182 and is located above the lower end of the connecting path (exit portion 164C, box-side exhaust port 184E) that connects the chip receiving portion 180A to the outside during operation, the durability of the dust box 180 can be improved without impairing the operability of confirming the accumulation of chips. In addition, the opening covered by the dust collector connection portion 190 (mounted portion 190A) during operation does not correspond to the connecting path described above. The dust box 180 is provided with: a box bottom 184F, which is connected to the dust box 180A. Fig.10The box bottom 84F described in the above description also functions in the same manner; and the inclined portion 184G is formed at the box bottom 184F. A portion of the box bottom 184F extends upward from the bottom of the interior of the dust box 180 (the storage portion 180A), thereby suppressing excessive heating of the lower portion of the dust box 180. In addition, the coverage range of the box bottom 184F is set to a range lower than the opening covered by the dust collector connection portion 190 (the installation portion 190A) during operation. Thus, the durability can be improved without compromising the operability of confirming the accumulation of chips.

[0256] The effect of the modified example is described. In the modified example, not only the upper surface of the inner cover wall 163 but also the lower surface is covered by the protective member (cover member 177). Therefore, even if the inner cover wall 163 is thermally deformed due to the heat being transferred from the protective member 170 that has been heated to such a high temperature that it cannot be completely dissipated due to the heat from the workpiece, the protective member (cover member 177) can effectively suppress a portion of the melted inner cover wall 163 from moving to the space (first space) where the saw blade 12 is located. That is, by covering both the first space side and the second space side of the partition with the protective member, better operability can be ensured. In addition, according to the operating machine of the modified example, a protective member (cover member 178) is used to cover the inner surface of the outer casing 182 in an area above the lower end of the connecting passage (outlet portion 164C, box-side exhaust port 184E) that connects the chip receiving portion 180A with the outside, so that the accumulation of chips can be confirmed and deformation of the outer casing 182 in the above area can be suppressed.

Claims

1. A working machine, characterized in that: have: The round top tool is driven by the prime mover to rotate, and the left and right direction is the plate thickness direction; The first space is the space where the top tool is located; A second space, comprising at least one of a passing space or a receiving space, wherein the passing space is used for the processing pieces generated by the operation performed using the top tool to pass through, and the receiving space is used for collecting the processing pieces; as well as a partition portion made of resin, located outside the top tool in the radial direction of the top tool and extending in the left-right direction, and partitioning the first space and the passing space in the radial direction of the top tool; a protective member for protecting the partition, In the radial direction of the top tool, the passage space is located outside the top tool. The protective member is provided in the region between the tip tool and the partition in the radial direction to cover the tip tool side of the partition, or in the region between the passage space and the partition in the radial direction to cover the passage space side of the partition, or the partition.

2. The working machine according to claim 1, characterized in that: The protection member has properties of being harder or having higher heat resistance than the partition, or both.

3. The working machine according to claim 1 or 2, characterized in that: The protection member is provided in a region between the first space and the partition and at least a portion thereof is exposed to the first space or in a region between the passage space and the partition and at least a portion thereof is exposed to the passage space.

4. The working machine according to claim 1 or 2, wherein: The protection member is mounted on the partition.

5. The working machine according to claim 1 or 2, characterized in that: having a cover covering at least a portion of the tip tool, The partition is provided on the cover.

6. A working machine comprising: A motor for rotating and driving a circular top tool with the left and right directions as the plate thickness direction; A cover covering at least a portion of the top tool; a discharge passage portion provided on the cover so as to be located outside the tip tool in the radial direction of the tip tool and used to discharge processed pieces generated when the tip tool is used to perform processing; a wall portion extending in the left-right direction and dividing the space where the top tool is located and the discharge passage portion; as well as The protection member is located in the discharge passage portion and covers the outer side of the wall portion located in the radial direction of the tip tool.

7. The working machine according to claim 6, wherein: A dust box is mounted on the cover, and the dust box accumulates the processed pieces discharged from the discharge passage portion.

8. The working machine according to claim 7, wherein: The discharge passage portion has: an inlet portion, open to the tip tool side; and The outlet portion is open to the dust box side, The guard member is disposed in a path from the inlet portion to the outlet portion.

9. The working machine according to claim 7 or 8, wherein: The dust box comprises the following components: A first housing is disposed adjacent to the cover; and a second housing covering the first housing from a side opposite to the cover; The first housing is made of metal, and the second housing is made of a transparent material.

10. The working machine according to claim 9, wherein: The first housing is provided with a stopper that abuts against the processed pieces discharged from the discharge passage portion to the dust box.

11. The working machine according to claim 9, wherein: The first housing has a cover portion formed thereon to cover a portion of the inner peripheral surface of the second housing.

12. The working machine according to claim 11, wherein: The cover portion covers at least a portion of an inner peripheral surface of a lower wall of the second housing.

13. The working machine according to claim 9, wherein: The second housing includes a resin material.

14. The working machine according to claim 7 or 8, wherein: A portion of the guard member extends toward the dust box further than the discharge passage portion.

15. The working machine according to claim 6, wherein: A guide wall is provided in the discharge passage portion, and the guide wall guides the flowing processed sheet toward the dust box side. The guard member is provided with a guide cover that covers at least a portion of the guide wall.

Images