JP2011042008A - Operation aid for power tool device, power tool device with operation aid - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an operation aid for a power tool device providing safe and high machining quality while allowing easy tool replacing work, and to provide the power tool device with the operation aid. <P>SOLUTION: The operation aid 31 for the power tool device is installed on a power tool 11 which transmits the driving force of a driving source 15 to a tool 13 to machine a workpiece W, and used in slide contact with the workpiece W for specifying the position of the tool 13 relative to the workpiece W. The operation aid 31 for the power tool device includes proximity limit specifying mechanisms 33c, 37a for specifying the limit of proximity of the tool 13 to the workpiece W. The proximity limit specifying mechanisms 33c, 37a allow the limit of proximity of the tool 13 to the workpiece W to be selectively changed. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an operation tool for an electric tool device and an electric tool device with an operation tool, and in particular, is used for realizing stable machining by defining a distance of a tool with respect to a workpiece to be machined. The present invention relates to an operation tool for an electric tool device and an electric tool device with an operation tool.

  Conventionally, by installing it on an electric tool, the distance between the workpiece as the workpiece and the tool as the processing means is adjusted, and the electric auxiliary tool used to realize stable machining is installed. Tools are known. For example, Patent Documents 1 to 3 listed below describe conventional operation assisting tools (in each patent document, they are described as a support tool, a guide plate, member guiding means, and the like). It is said that, even if the operator is an unskilled operator, the built-up portion such as a weld bead can be accurately and beautifully polished.

JP 2002-370150 A Japanese Utility Model Publication No. 63-172555 Japanese Utility Model Publication No. 63-193648

  However, the conventional operation assisting tools represented by the above-mentioned Patent Documents 1 to 3 provide a movement limit at a position where the tool is separated from the work, and the movement limit in the proximity direction in which the work is pressed is set. Absent. Therefore, since the processing is performed as the tool is pressed, the processing depth by the tool cannot be adjusted.

  Moreover, in the conventional operation assistance tool represented by the said patent documents 1-3, the problem that the angle of a tool cannot be changed arbitrarily existed. The cutting angle of the tool with respect to the workpiece must be changed as appropriate depending on the type and dimensions of the tool. However, with conventional operation aids, this tool angle cannot be changed freely. There was a problem that it was difficult to obtain high processing quality.

  Furthermore, in the conventional operation assisting tools represented by the above-mentioned Patent Documents 1 to 3, since various members constituting the conventional operation assisting tools become an obstacle when exchanging tools, it takes a lot of labor for the tool exchanging work. There was a problem of taking time.

  The present invention has been made in view of the existence of the various problems described above, and its purpose is to obtain a safe and high processing quality regardless of the skill level of the operator. Another object of the present invention is to provide a power tool device operation assisting tool and an operation tool-equipped power tool device that facilitate tool replacement work.

  The present invention will be described below. In addition, in order to make an understanding of this invention easy, the reference number of an accompanying drawing is attached in parenthesis writing, However, This invention is not limited to the form of illustration by it.

  The power tool device operation assisting tool (31, 31 ′, 51, 71, 91, 111, 131, 171, 181, 211, 311, 321) according to the present invention uses a driving force from the driving source (15) as a tool. The tool for the workpiece (W) is installed in the electric tool (11) that performs processing on the workpiece (W) by transmitting to (13) and is used in sliding contact with the workpiece (W). (13) A power tool operation assisting tool (31, 31 ′, 51, 71, 91, 111, 131, 171, 181, 211, 311, 321) for defining the relative position of the tool (13) ) Is a proximity limit defining mechanism (33c, 37a, 53c, 57a, 76 ′, 82 ′, 83 ′, 93c, 97a, 145, 175, 184, 18) that regulates the limit at the time of approaching the workpiece (W). , Characterized in that it comprises 212d, 213b, 312d, and 313b).

  Further, in the power tool device operation assisting tool (31, 31 ′, 51, 71, 91, 111, 131, 171, 181, 211, 221, 311, 321) according to the present invention, the proximity limit defining mechanism (33c) 37a, 53c, 57a, 76 ', 82', 83 ', 93c, 97a, 145, 184, 185, 212d, 213b, 312d, 313b) are the proximity limits of the tool (13) to the workpiece (W). Can be arbitrarily changed.

  Furthermore, in the operation tool for the electric tool device (31, 31 ′, 51, 71, 91, 111, 131, 171, 181, 211, 221, 311, 321) according to the present invention, the tool (13) is Urging force applying means (36, 56, 76, 76 ′, 96, 116, 146, 179, 189, 214c, 313, 312d) for urging in a direction away from the work (W), the urging force applying means (36, 56, 76, 76 ′, 96, 116, 146, 179, 189, 214c, 313, 312d), the urging force is always applied in the direction in which the tool (13) is separated from the workpiece (W). When the tool (13) comes close to the workpiece (W) when the force against the biasing force is applied, the workpiece (W) is processed. It can be configured to so that.

  Still further, in the power tool device operation assisting tool (51, 71, 91, 111, 131, 221) according to the present invention, the tool angle that allows the inclination angle of the tool (13) to be changed with respect to the workpiece (W). A change mechanism (60, 61, 80, 81, 100, 101, 121, 140, 141, 214a, 231 and 232) may be provided.

  Furthermore, in the power tool device operation assisting tool (91, 211, 221, 311, 321) according to the present invention, when the tool (13) is exchanged, the operation assisting tool (91, 211, 221). 311, 321) may be provided with a tool retracting mechanism (102, 102a, 214, 314) for retracting the tool (13).

  The power tool device (10, 50, 70, 90, 110, 130, 150, 160, 170, 180, 210, 220, 310, 320) according to the present invention is driven from the drive source (15). By transmitting the force to the tool (13), the electric tool (11) for performing processing on the work (W) and the electric tool (11) are installed and used in sliding contact with the work (W). Thus, operation assisting tools (31, 31 ′, 51, 71, 91, 111, 131, 171, 181, 211, 211, 311, 321) for defining the relative position of the tool (13) with respect to the workpiece (W) , A power tool device with an operation aid (10, 50, 70, 90, 110, 130, 150, 160, 170, 180, 210, 220, 310, 320), (31, 31 ′, 51, 71, 91, 111, 131, 171, 181, 211, 311, 321) is a proximity limit that defines a limit when the tool (13) is close to the workpiece (W) It is characterized by comprising a regulating mechanism (33c, 37a, 53c, 57a, 76 ', 82', 83 ', 93c, 97a, 145, 175, 184, 185, 212d, 213b, 312d, 313b).

  ADVANTAGE OF THE INVENTION According to this invention, even if it is operated by the operator of what skill level, it is possible to obtain a safe and high machining quality, and further, an operation assisting tool for an electric tool device that is easy to change tools, and an operation assisting tool An attached electric tool device can be provided.

It is an external appearance side view of the electric tool device with an operation aid concerning a first embodiment. It is an external appearance top view of the power tool apparatus with an operation assistance tool which concerns on 1st embodiment. It is a figure which shows the longitudinal cross-section of the electric tool apparatus with an operation assistance tool which concerns on 1st embodiment shown in FIG. It is a figure which shows the AA cross section in FIG. It is a figure which shows the BB cross section in FIG. BRIEF DESCRIPTION OF THE DRAWINGS It is the figure which showed the principal part of the operation assistance tool which concerns on 1st embodiment, The fragmentary figure (a) in a figure is a principal part top view of an operation assistance tool, A divided figure (b) is a division figure (a). A sectional view C-C of the inside shows a rear view of the operation assisting tool. It is a figure which illustrates the state at the time of operation of the power tool device with an operation auxiliary tool concerning a first embodiment, and represents the state where the power tool was pressed in the work direction. It is a figure which shows another form example which the proximity | contact limit prescription | regulation part which concerns on 1st embodiment can take. It is a figure which shows the longitudinal cross-section of the electric tool apparatus with an operation assistance tool which concerns on 2nd embodiment. It is a figure which shows the DD cross section in FIG. It is the figure which showed the principal part top view of the operation assistance tool which concerns on 2nd embodiment. It is a figure which illustrates the state at the time of operation of the electric tool apparatus with the operation assistance tool which concerns on 2nd embodiment, and represents the state which pressed the electric tool in the workpiece | work direction. It is a figure which shows the longitudinal cross-section of the electric tool apparatus with an operation assistance tool which concerns on 3rd embodiment. It is a figure which shows the EE cross section in FIG. It is a figure which shows the FF cross section in FIG. It is a figure which shows the longitudinal cross-section of the electric tool apparatus with an operation assistance tool which concerns on 4th embodiment. It is a figure which shows the GG cross section in FIG. It is the figure which showed the principal part top view of the horizontal surface plate which concerns on 4th embodiment. It is a figure which illustrates the tool evacuation mechanism which the operation assistance tool which concerns on 4th embodiment has. It is an external appearance side view of the electric tool apparatus with an operation assistance tool which concerns on 5th embodiment. It is a figure which shows the longitudinal cross-section of the electric tool apparatus with an operation assistance tool which concerns on 5th embodiment shown in FIG. It is a figure which shows the HH cross section in FIG. It is a principal part schematic diagram for demonstrating the principal part of the operation assistance tool which concerns on 5th embodiment. It is the figure which showed the principal part top view of the operation assistance tool which concerns on 5th embodiment. It is a figure which shows the longitudinal cross-section of the electric tool apparatus with an operation assistance tool which concerns on 6th embodiment. It is a figure which shows the II cross section in FIG. It is a figure which illustrates one form of the electric tool apparatus with an operation assistance tool provided with the operation assistance tool applied to the electric tool of a type provided with a cylindrical grindstone. It is a figure which illustrates one form of the electric tool apparatus with an operation assistance tool provided with the operation assistance tool applied to the electric tool of a type provided with an abrasive belt. It is a figure which shows the longitudinal cross-section of the electric tool apparatus with an operation assistance tool which concerns on 7th embodiment. It is a figure which shows the JJ cross section in FIG. It is a longitudinal cross-sectional view which illustrates another form from the operation assistance tool which concerns on 7th embodiment. It is a figure which shows the KK cross section in FIG. It is an external appearance side view of the electric tool apparatus with an operation assistance tool which concerns on 8th embodiment. It is a figure which shows the longitudinal cross-section of the electric tool apparatus with an operation assistance tool which concerns on 8th embodiment shown in FIG. It is the principal part top view which showed the principal part of the surface plate for corners which the electric tool apparatus with an operation assistance tool which concerns on 8th embodiment has, and its peripheral member. It is a figure for demonstrating the cross-sectional shape of the surface plate for corners which the electric tool apparatus with an operation assistance tool which concerns on 8th embodiment has, and has shown the PP cross section in FIG. It is a figure which shows the state at the time of grindstone replacement | exchange of the electric tool apparatus with an operation assistance tool which concerns on 8th embodiment. It is an external appearance side view of the electric tool apparatus with an operation assistance tool which concerns on 9th embodiment. It is a figure which shows the longitudinal cross-section of the electric tool apparatus with an operation assistance tool which concerns on 9th embodiment shown in FIG. It is a figure which shows the state at the time of grindstone replacement | exchange of the electric tool apparatus with an operation assistance tool which concerns on 9th embodiment. It is a figure which illustrates the electric tool apparatus with an operation assistance tool which has a surface plate for corners with a tool angle change mechanism. It is an external appearance side view of the electric tool apparatus with an operation assistance tool which concerns on 10th embodiment. It is a figure which shows the longitudinal cross-section of the electric tool apparatus with an operation assistance tool which concerns on 10th embodiment shown in FIG. It is the principal part top view which showed the principal part of the surface plate for corners which the electric tool apparatus with an operation assistance tool which concerns on 10th embodiment has, and its peripheral member. It is a figure for demonstrating the cross-sectional shape of the surface plate for corners which the electric tool apparatus with an operation assistance tool which concerns on 10th embodiment has, and the fractional drawing (a) in a figure shows the LL cross section in FIG. The partial diagram (b) shows the MM cross section in FIG. It is a figure which shows the state at the time of grindstone replacement | exchange of the electric tool apparatus with an operation assistance tool which concerns on 10th embodiment. It is an external appearance side view of the electric tool apparatus with an operation assistance tool which concerns on 11th embodiment. It is a figure which shows the longitudinal cross-section of the electric tool apparatus with an operation assistance tool which concerns on 11th embodiment shown in FIG. It is a figure which shows the NN cross section in FIG. It is a figure which shows the state at the time of grindstone replacement | exchange of the electric tool apparatus with an operation assistance tool which concerns on 11th embodiment.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments for carrying out the invention will be described with reference to the drawings. The following embodiments do not limit the invention according to each claim, and all combinations of features described in the embodiments are not necessarily essential to the solution means of the invention. .

[First embodiment]
FIG. 1 is an external side view of the electric tool device with an operation assisting tool according to the first embodiment, and FIG. 2 is an external top view of the electric tool device with an operation auxiliary tool according to the first embodiment. Moreover, FIG. 3 is a figure which shows the longitudinal cross-section of the electric tool apparatus with an operation assistance tool which concerns on 1st embodiment shown in FIG.

  As shown in FIGS. 1 to 3, the power tool device 10 with operation aids according to the first embodiment includes a power tool 11 that performs processing on a workpiece W to be processed, and the power tool. 11, the power tool device operation assisting tool (hereinafter referred to as “operation assisting tool”) 31. In this specification, the case where the electric tool 11 is configured as a portable grinder will be described as an example. Therefore, first, a schematic configuration of the electric power tool 11 according to the first embodiment will be described below.

  The electric tool 11 according to the first embodiment is an apparatus configured as a portable grinder as shown in FIGS. 1 to 3 and is formed in a substantially cylindrical shape so that an operator can hold it with one hand. A resin housing 12 is provided. Moreover, this electric tool 11 has a disk-shaped grindstone 13 which is a tool for performing a grinding operation.

  The resin-made housing 12 is formed in a substantially cylindrical shape so as to function as a gripping part that is gripped by the operator's hand, and a metal gear case 14 is connected to the front end of the housing 12 serving as the gripping part. Has been. And the grindstone 13 as a tool which will perform grinding work is arrange | positioned with respect to the lower part of this gear case 14. As shown in FIG.

  Further, as shown in FIG. 3 depicting the internal structure of the electric tool 11, a motor 15 serving as a drive source for driving the grindstone 13 is accommodated in the housing 12. The motor 15 is arranged such that the axis of the motor shaft 16 substantially overlaps the axis of the cylindrical housing 12. Further, the front end portion 16 a of the motor shaft 16 protrudes from the housing 12 into the gear case 14 and is pivotally supported by a front bearing 17 fixed in the gear case 14, and the rear end portion 16 b of the motor shaft 16 is supported by the housing 12. The rear part 18 is pivotally supported at the rear part. Therefore, the motor shaft 16 is configured to be able to rotate at high speed by pivotally supporting the both end portions 16a and 16b by the front and rear bearings 17 and 18.

  A cooling fan 19 is installed on the front end 16 a side of the motor shaft 16 so as to be accommodated in the housing 12. The cooling fan 19 is arranged in the housing 12 and plays a role of passing cooling air through the central portion of the housing 12. That is, a gap is provided between the motor 15 and the inner wall surface of the housing 12, and an intake hole 12c is formed on the rear end side of the housing 12 (see FIGS. 1 and 2). An exhaust hole 14a is formed in the gear case 14 connected to the front end (see FIG. 2). When the cooling fan 19 rotates together with the motor shaft 16, the outside air is taken into the housing 12 through the intake hole 12c, cools the motor 15 and the like through the gap in the housing 12, and then is discharged out of the machine through the exhaust hole 14a. Will be.

  A commutator 20 is attached to the rear end portion 16 b of the motor shaft 16, and a brush (not shown) attached to the housing 12 is in contact with the commutator 20. The commutator 20 and the brush (not shown) are also cooled by the cooling air introduced from the air inlet 12c by the action of the cooling fan 19 described above.

  Further, as shown in FIG. 3, a small bevel gear 22 fixed to the front end portion 16 a of the motor shaft 16 and a large bevel gear 23 that meshes with the small bevel gear 22 are accommodated in the gear case 14. The large bevel gear 23 is fixed to a drive shaft 25 that is vertically supported in the gear case 14 via a bearing 24. The drive shaft 25 protrudes below the gear case 14, and the grindstone 13 extends to the protruding portion. Is configured to be detachably fixed. When the motor 15 rotates, this rotational driving force is transmitted from the motor shaft 16 to the small bevel gear 22 and the large bevel gear 23, and the grinding wheel 13 is finally rotated to perform grinding on the workpiece W. .

  An unillustrated on / off switch and the like are housed on the rear side of the housing 12, and the motor 15 rotates or stops when the operator switches the on / off switch. It is possible to perform operations. That is, when the operator holds the housing 12 with one hand and turns on an on / off switch (not shown) with the finger of the other hand, the motor 15 rotates and the motor shaft 16 rotates the small bevel gear 22 and the large bevel gear 23. Power is transmitted to and the grindstone 13 rotates. Thereby, it can grind with respect to the workpiece | work W which is a workpiece. At this time, since the cooling fan 19 rotates simultaneously with the rotation of the motor shaft 16, outside air is taken into the housing 12 from the intake hole 12 c of the housing 12. The outside air passes through the gap between the inner wall surface of the housing 12 and the motor 15 to cool the heat sources such as the motor 15, the commutator 20, and a brush (not shown), and then passes through the casing 12 to exhaust the gear case 14. Since the holes 14a are discharged from the machine, safe and stable operation of the electric tool 11 is realized. When the grinding operation is completed and the operator turns off an on / off switch (not shown), the motor 15 stops and the grindstone 13 stops rotating.

  The schematic configuration of the electric tool 11 according to the first embodiment has been described above. Next, the operation assistance tool 31 installed in the electric tool 11 which is a main constituent member of the electric tool device with operation assistance tool 10 according to the first embodiment will be described. In addition, in description of the operation assistance tool 31 which concerns on 1st embodiment, in addition to FIGS. 1-3, suppose that FIGS. 4-7 is added to a reference drawing. Here, FIG. 4 is a diagram showing an AA section in FIG. 3, and FIG. 5 is a diagram showing a BB section in FIG. FIG. 6 is a view showing a main part of the operation assisting tool according to the first embodiment. FIG. 6 (a) is a top view of the main part of the operation assisting tool. ) Is a sectional view taken along the line CC in the partial diagram (a), and the partial diagram (c) is a rear external view of the operation assisting tool. Further, FIG. 7 is a diagram illustrating a state at the time of operation of the power tool device 10 with the operation assisting tool according to the first embodiment, and represents a state where the power tool 11 is pressed in the workpiece W direction.

  The operation assisting tool 31 according to the first embodiment is used in sliding contact with a workpiece W that is a horizontal plane, whereby a horizontal surface plate 32 that defines the relative position of the grindstone 13 with respect to the workpiece W, and the horizontal surface plate 32. It comprises two first and second connection arms 33 and 34 that connect the electric power tool 11.

  The first connection arm 33 located on the grindstone 13 side includes a pair of arm portions 33a and 33b formed extending from the gear case 14 toward the horizontal surface plate 32, and a rod portion connecting the pair of arm portions 33a and 33b. 33c. One end side of the pair of arm portions 33a and 33b is securely connected to the gear case 14 by screws, while the other end side of the pair of arm portions 33a and 33b is the horizontal side of the rod portion 33c. The rod portion 33 c is installed in a conductive manner with respect to the long hole 35 formed in the surface plate 32. Thereby, the connection relationship between the horizontal surface plate 32 and the power tool 11 by the first connection arm 33 on the grindstone 13 side is maintained. In addition, about the screw | thread which connects the one end side of a pair of arm parts 33a and 33b, and the gear case 14, the screw used in order to connect the gear case 14 and the housing 12 is combined. With this configuration, the number of parts can be reduced and a cost reduction effect can be obtained.

  As shown in FIG. 4, the second connection arm 34 located on the rear side of the housing 12, that is, on the anti-grinding stone 13 side of the electric tool 11, is in the direction of the circumferential portion 34 a surrounding the housing 12 and the horizontal surface plate 32. A pair of leg portions 34b, 34c extending to the opposite side is provided, and the circumferential portion 34a and the pair of foot portions 34b, 34c are formed as one member. The second connection arm 34 includes a rod portion 34d that connects the pair of feet 34b and 34c. The rod portion 34d is installed such that both shaft ends engage with an engagement hole having a diameter substantially the same as or slightly larger than the diameter of the rod portion 34d formed at the rear of the horizontal surface plate 32. The second connection arm 34 is configured to be rotatable relative to the horizontal surface plate 32 with the rod portion 34d as a rotation center. Further, the second connection arm 34 is provided with a fastening mechanism 34e in the vicinity of the boundary between the rotating portion 34a and the pair of feet 34b and 34c. The fastening mechanism 34e is constituted by a screw installed near the boundary. By rotating the screw clockwise, the interval near the boundary between the circulating portion 34a and the pair of feet 34b and 34c is narrowed. The second connecting arm 34 is securely fixed to the housing 12 by the circumferential portion 34 a tightening the housing 12. On the contrary, when the screw is rotated counterclockwise, the tightening force of the housing 12 by the rotating portion 34a is relieved, and the housing 12 and the second connection arm 34 can be separated or adjusted in position.

  Further, a torsion spring 36 is installed in the vicinity of the connection portion between the horizontal surface plate 32 and the second connection arm 34. The torsion spring 36 is a member that functions as an urging force applying unit that urges the grindstone 13 in a direction away from the workpiece W. In a normal state where no external force is applied by the action of the torsion spring 36. The second connecting arm 34 is configured to exert an urging force in the direction in which the second connection arm 34 rotates rearward with respect to the horizontal surface plate 32, that is, in the direction in which the grindstone 13 of the power tool 11 is separated from the workpiece W (see FIG. 3 state). On the other hand, when the force against the urging force of the torsion spring 36 is applied to the electric tool 11, the grindstone 13 comes close to the workpiece W, and the grindstone 13 can be ground to the workpiece W. (State of FIG. 7).

  In addition, about the range of the rotation operation | movement of the electric tool 11 centering on the rod part 34d which the 2nd connection arm 34 has as a rotation center, it depends on the magnitude | size of the long hole 35 which the rod part 33c which the 1st connection arm 33 has conduct | electrically_connected. The maximum movable range will be defined, but in the operation assisting tool 31 according to the first embodiment, a proximity limit defining mechanism that defines a limit when the grindstone 13 approaches the workpiece W is installed, The proximity limit between the grindstone 13 and the workpiece W, that is, the grinding depth can be defined. A specific configuration of the proximity limit defining mechanism will be described with reference to FIGS. 3 and 6.

  The proximity limit defining mechanism according to the first embodiment includes a proximity limit defining portion 37 having an inclined surface 37 a installed above the horizontal surface plate 32, and an adjustment screw shaft 38 screwed into the proximity limit defining portion 37. And is configured. The proximity limit defining portion 37 has a nut 37 b that is screwed with the adjustment screw shaft 38, and the upper surface of the horizontal surface plate 32 can be moved by rotating the adjustment screw shaft 38. The proximity limit defining portion 37 is formed with a notch guide portion 37c that engages with a guide shaft 32a installed on the upper surface of the horizontal surface plate 32. The notch guide portion 37c has a sliding contact surface with the guide shaft 32a formed in the longitudinal direction of the horizontal surface plate 32. Therefore, when the adjusting screw shaft 38 rotates, the proximity limit defining portion 37 is connected to the guide shaft 32a. It can move along the longitudinal direction of the horizontal surface plate 32 by the action of the notch guide portion 37c.

  Further, the inclined surface 37a included in the proximity limit defining portion 37 is configured to be positioned below the rod portion 33c included in the first connection arm 33. Further, the inclined surface 37a is further illustrated in FIG. As shown in detail, the rod portion 33c is arranged so as to be able to move back and forth at a position that blocks the lower side of the long hole 35 through which the rod portion 33c conducts. Accordingly, by rotating the adjustment screw shaft 38 and moving the proximity limit defining portion 37 back and forth, the inclined surface 37a of the proximity limit defining portion 37 changes the opening range on the lower side of the long hole 35, so the rod portion 33c. The lower limit range that can be moved becomes adjustable. Thereby, the proximity limit between the grindstone 13 and the workpiece W, that is, the grinding depth can be freely changed to an arbitrary condition value.

  In the proximity limit defining mechanism according to the first embodiment, the operation portion 38a of the adjustment screw shaft 38 is provided at a position slightly protruding from the rear end of the horizontal surface plate 32. The position can be easily moved. In the first embodiment, since the distance between the operation portion 38a of the adjustment screw shaft 38 and the screwed portion of the adjustment screw shaft 38 with the nut 37b is separated, the adjustment screw shaft 38 is stably operated. A shaft support member 39 is provided. By the action of the shaft support member 39, the adjustment screw shaft 38 does not bend at the time of rotation, and the adjustment screw shaft 38 is stabilized.

  The specific configuration of the operation assisting tool 31 according to the first embodiment has been described above. Then, operation | movement of the operation assistance tool 31 which concerns on 1st embodiment is demonstrated.

  In the operation assisting tool 31 according to the first embodiment, in a normal state where no external force is applied, the second connection arm 34 rotates backward with respect to the horizontal surface plate 32 by the action of the torsion spring 36. An urging force is applied in the moving direction, and the grindstone 13 side of the electric power tool 11 is in a state of receiving the urging force in a direction away from the horizontal surface plate 32. From such a normal state, the horizontal surface plate 32 is arranged on the horizontal plane of the workpiece W, and the proximity limit between the grindstone 13 and the workpiece W is adjusted by pinching and rotating the operation portion 38a of the adjustment screw shaft 38. Can do. Although not shown in the figure, by installing a scale with respect to the adjustment screw shaft 38 and the like, the opening range on the lower side of the long hole 35 where the inclined surface 37a of the proximity limit defining portion 37 is blocked is grasped. Alternatively, the grinding depth can be grasped by converting from the adjustment position of the inclined surface 37a.

  After determining the proximity limit of the grindstone 13 and the workpiece W, that is, the grinding depth by the above procedure, the electric tool 11 is pressed in the direction of the workpiece W as shown in FIG. Can be done. In the first embodiment, the grinding depth of the grindstone 13 is defined by the action of the proximity limit defining mechanism including the proximity limit defining portion 37, the adjustment screw shaft 38, and the like. In addition, grinding is not performed. Further, if the pressing force in the workpiece W direction against the electric tool 11 is released, the grindstone 13 receives the urging force in the direction away from the workpiece W by the action of the torsion spring 36, and retreats from the horizontal surface plate 32. The rotating tool and the workpiece come into contact with each other, and there is no problem that the workpiece is damaged or the tool is damaged.

  As mentioned above, although preferred embodiment of this invention was described, the technical scope of this invention is not limited to the range as described in the said embodiment. Various modifications or improvements can be added to the embodiment. For example, the shape of the inclined surface 37a included in the proximity limit defining portion 37 according to the first embodiment described above may be a ring shape as shown in FIG. In the case of the first embodiment described above, the separation limit (upper limit position) in the direction in which the grindstone 13 is separated from the workpiece W is constant, but in the case of the embodiment shown in FIG. In addition to the inclined surface 47a that defines the 13 proximity limit (lower limit position), it has the inclined surface 47b that defines the separation limit (upper limit position) parallel to the inclined surface 47a. Can always be the same. It is apparent from the description of the scope of claims that embodiments with such changes or improvements can be included in the technical scope of the present invention.

[Second Embodiment]
Next, the operation tool-equipped power tool device according to the second embodiment will be described with reference to FIGS. The power tool device 50 with operation aids according to the second embodiment is characterized in that it includes a tool angle changing mechanism for making the inclination angle of the grindstone 13 relative to the workpiece W freely changeable. In each embodiment described below, members that are the same as or similar to the members described in the first embodiment may be denoted by the same reference numerals and description thereof may be omitted.

  FIG. 9 is a view showing a longitudinal section of the power tool device with operation aid according to the second embodiment, and FIG. 10 is a view showing a DD section in FIG. 9. Moreover, FIG. 11 is the figure which showed the principal part top view of the operation assistance tool which concerns on 2nd embodiment. Furthermore, FIG. 12 is a figure which illustrates the state at the time of operation of the electric tool apparatus with an operation assistance tool which concerns on 2nd embodiment, and represents the state which pressed the electric tool in the workpiece | work direction.

  The power tool device 50 with an operation assisting tool according to the second embodiment is used in sliding contact with a workpiece W that is a horizontal plane, whereby a horizontal surface plate 52 that defines the relative position of the grindstone 13 with respect to the workpiece W, and the horizontal An operation assisting tool 51 including two first and second connection arms 53 and 54 that connect the surface plate 52 and the electric tool 11 is provided.

  The first connection arm 53 located on the grindstone 13 side extends from the gear case 14 in the direction of the horizontal surface plate 52 and a pair of arm portions 53a and 53b, and a rod portion that connects the pair of arm portions 53a and 53b. 53c. One end sides of the pair of arm portions 53a and 53b are securely connected to the gear case 14 by screws, while the rod portion 53c installation side which is the other end side of the pair of arm portions 53a and 53b is horizontal. A rod portion 53c is electrically connected to a long hole 55 formed in the surface plate 52. Thereby, the connection relationship between the horizontal surface plate 52 and the power tool 11 by the first connection arm 53 on the grindstone 13 side is maintained. In addition, about the screw | thread which connects the gear case 14 and the one end side of a pair of arm part 53a, 53b, the screw used in order to connect the gear case 14 and the housing 12 is combined. With this configuration, the number of parts can be reduced and a cost reduction effect can be obtained.

  As shown in FIG. 10, the second connection arm 54 located on the rear side of the housing 12, that is, on the anti-grinding stone 13 side of the electric tool 11, is in the direction of the circumferential portion 54 a surrounding the housing 12 and the horizontal surface plate 52. A pair of leg portions 54b, 54c extending to the opposite side is provided, and the circumferential portion 54a and the pair of foot portions 54b, 54c are formed as one member. The second connection arm 54 includes a rod portion 54d that connects the pair of feet 54b and 54c.

  Here, as a feature point of the second embodiment, the rod portion 54d is installed with its both shaft ends engaged with a long hole 60 formed at the rear of the horizontal surface plate 52 (FIG. 12). The second connection arm 54 is configured to be rotatable relative to the horizontal surface plate 52 with the rod portion 54d as a rotation center. Further, as shown in FIG. 10, the rod portion 54 d is provided with a nut 61 on one side of the shaft end so that the rod portion 54 d can be fixed at an arbitrary position of the long hole 60. Therefore, by tightening the nut 61, the rod portion 54d is fixed at an arbitrary position of the long hole 60, and the second connection arm 54 is in a rotatable state in this fixed state. With this configuration, the rotational center of the rotational movement of the electric tool 11 can be moved to an arbitrary position, so that the contact angle of the grindstone 13 with respect to the workpiece W plane can be arbitrarily changed.

  As described above, in the power tool device 50 with operation aids according to the second embodiment, as a tool angle changing mechanism, the contact angle of the grindstone 13 with respect to the workpiece W plane can be arbitrarily changed. The rod portion 54d having the nut 61 and the long hole 60 are provided. By such an action of the tool angle changing mechanism, an optimum grindstone angle can be set according to various conditions such as the type, material, shape and compatibility with the workpiece W of the grindstone 13. Therefore, according to the electric tool device 50 with an operation aid according to the second embodiment, it is possible to obtain high processing quality.

  The second connection arm 54 is provided with a fastening mechanism 54e in the vicinity of the boundary between the circulating portion 54a and the pair of feet 54b and 54c. The fastening mechanism 54e is configured by a screw installed near the boundary. By rotating the screw clockwise, the interval near the boundary between the circulating portion 54a and the pair of feet 54b and 54c is narrowed. The second connecting arm 54 is securely fixed to the housing 12 by the circumferential portion 54 a tightening the housing 12. On the contrary, when the screw is rotated counterclockwise, the tightening force of the housing 12 by the rotating portion 54a is alleviated, and the housing 12 and the second connection arm 54 can be separated and adjusted in position.

  Further, a torsion spring 56 is installed in the vicinity of the connection portion between the horizontal surface plate 52 and the second connection arm 54 at a position that avoids the nut 61 of the rod portion 54d. The torsion spring 56 is a member that functions as an urging force applying means that urges the grindstone 13 in the direction away from the workpiece W. In the normal state where no external force is applied by the action of the torsion spring 56. The second connecting arm 54 is configured to exert a biasing force in the direction in which the second connection arm 54 rotates rearward with respect to the horizontal surface plate 52, that is, in the direction in which the grindstone 13 of the power tool 11 is separated from the workpiece W (see FIG. 9 state). On the other hand, when the force against the urging force of the torsion spring 56 is applied to the electric tool 11, the grindstone 13 comes close to the workpiece W, and the grind processing on the workpiece W by the grindstone 13 becomes possible. (State of FIG. 12).

  In addition, about the range of the rotation operation | movement of the electric tool 11 centering on the rod part 54d which the 2nd connection arm 54 has rotation, it depends on the magnitude | size of the long hole 55 which the rod part 53c which the 1st connection arm 53 has conduct | electrically_connected. The maximum movable range will be defined, but in the operation assisting tool 51 according to the second embodiment, a proximity limit defining mechanism that defines a limit when the grindstone 13 approaches the workpiece W is installed, The proximity limit between the grindstone 13 and the workpiece W, that is, the grinding depth can be defined. A specific configuration of the proximity limit defining mechanism will be described with reference to FIGS. 9 and 11.

  The proximity limit defining mechanism according to the second embodiment includes a proximity limit defining portion 57 having an inclined surface 57 a installed above the horizontal surface plate 52, and an adjustment screw shaft 58 screwed into the proximity limit defining portion 57. And is configured. The proximity limit defining portion 57 has a nut 57 b that is screwed with the adjustment screw shaft 58, and the upper surface of the horizontal surface plate 52 can be moved by rotating the adjustment screw shaft 58. The proximity limit defining portion 57 is formed with a notch guide portion 57c that engages with a guide shaft 52a installed on the upper surface of the horizontal surface plate 52. The notch guide portion 57c is formed so that the sliding contact surface with the guide shaft 52a faces the longitudinal direction of the horizontal surface plate 52. Therefore, when the adjusting screw shaft 58 rotates, the proximity limit defining portion 57 is connected to the guide shaft 52a. It can move along the longitudinal direction of the horizontal surface plate 52 by the action of the notch guide portion 57c.

  Further, the inclined surface 57a included in the proximity limit defining portion 57 is configured to be positioned below the rod portion 53c included in the first connection arm 53. Further, the inclined surface 57a is further illustrated in FIG. As shown in detail, the rod portion 53c is arranged so as to be able to move back and forth at a position that blocks the lower side of the long hole 55 through which the rod portion 53c conducts. Accordingly, by rotating the adjustment screw shaft 58 and moving the proximity limit defining portion 57 back and forth, the inclined surface 57a of the proximity limit defining portion 57 changes the opening range on the lower side of the long hole 55, so the rod portion 53c. The lower limit range that can be moved becomes adjustable. Thereby, the proximity limit between the grindstone 13 and the workpiece W, that is, the grinding depth can be freely changed to an arbitrary condition value.

  In the proximity limit defining mechanism according to the second embodiment, the operation portion 58a of the adjustment screw shaft 58 is provided at a position slightly protruding from the rear end of the horizontal surface plate 52. The position can be easily moved. In the second embodiment, since the distance between the operation portion 58a of the adjustment screw shaft 58 and the screwed portion of the adjustment screw shaft 58 with the nut 57b is separated, the adjustment screw shaft 58 is stably operated. A shaft support member 59 is installed. By the action of the shaft support member 59, the adjustment screw shaft 58 does not bend at the time of rotation, and the adjustment screw shaft 58 is stabilized.

  The specific configuration of the operation assisting tool 51 according to the second embodiment has been described above. Then, operation | movement of the operation assistance tool 51 which concerns on 2nd embodiment is demonstrated.

  In the operation assisting tool 51 according to the second embodiment, in a normal state where no external force is applied, the second connection arm 54 rotates backward with respect to the horizontal surface plate 52 by the action of the torsion spring 56. An urging force is applied in the moving direction, and the grindstone 13 side of the electric power tool 11 is in a state of receiving the urging force in a direction away from the horizontal surface plate 52. From such a normal state, the horizontal surface plate 52 is arranged on the horizontal surface of the workpiece W, and the proximity limit between the grindstone 13 and the workpiece W is adjusted by pinching and rotating the operation portion 58a of the adjustment screw shaft 58. Can do. Although not shown in the figure, by installing a scale with respect to the adjustment screw shaft 58 or the like, the opening range on the lower side of the long hole 55 where the inclined surface 57a of the proximity limit defining portion 57 is blocked is grasped. Alternatively, the grinding depth can be grasped by converting from the adjustment position of the inclined surface 57a.

  After determining the proximity limit of the grindstone 13 and the workpiece W, that is, the grinding depth in the above procedure, the electric tool 11 is pressed in the direction of the workpiece W as shown in FIG. Can be done. In the second embodiment, the grinding depth of the grindstone 13 is defined by the action of the proximity limit defining mechanism including the proximity limit defining portion 57 and the adjustment screw shaft 58. In addition, grinding is not performed. Further, if the pressing force in the workpiece W direction against the electric power tool 11 is released, the grindstone 13 receives a biasing force in a direction away from the workpiece W by the action of the torsion spring 56, and retreats from the horizontal surface plate 52. The rotating tool and the workpiece come into contact with each other, and there is no problem that the workpiece is damaged or the tool is damaged. Furthermore, since the operation assisting tool 51 according to the second embodiment includes the rod portion 54d having the nut 61 as the tool angle changing mechanism and the long hole 60, the type, material, shape, and workpiece W of the grindstone 13 are shown. The optimum grindstone angle can be set according to various conditions such as compatibility with. Therefore, according to the electric tool device 50 with an operation aid according to the second embodiment, it is possible to obtain high processing quality.

[Third embodiment]
In the power tool devices 10 and 50 with operation aids according to the first and second embodiments described above, the torsion springs 36 and 56 are provided only at the connection points between the horizontal surface plates 32 and 52 and the second connection arms 34 and 54. It had an installed configuration. In the electric tool device 70 with an operation aid according to the third embodiment to be described next, a configuration in which torsion springs are installed at two locations of the first connection arm and the second connection arm that are connected to the horizontal surface plate is illustrated. Is. Here, FIG. 13 is a view showing a longitudinal section of the power tool device with operation aids according to the third embodiment. 14 is a view showing a cross section taken along the line EE in FIG. 13, and FIG. 15 is a view showing a cross section taken along the line FF in FIG.

  As shown in FIGS. 13 to 15, the operation assisting tool 71 according to the third embodiment is the second embodiment in that it includes a rod portion 74 d having a nut 81 as a tool angle changing mechanism and a long hole 80. The operation assisting tool 71 according to the third embodiment, on the other hand, has the same configuration as that of the embodiment, but the torsion spring installed at the connection place between the horizontal surface plate 72 and the second connection arm 74 76 has a structural feature that differs from the first and second embodiments described above in that it functions as a biasing force applying means that biases the grindstone 13 in the direction in which the grindstone 13 approaches the workpiece W.

  That is, the torsion spring 76 provided at the rear of the operation assisting tool 71 exerts an action of urging the second connection arm 74 diagonally forward and upward. However, in the operation assisting tool 71 according to the third embodiment, a torsion spring 76 ′ is also installed at a connection portion between the horizontal surface plate 72 and the first connection arm 73, and this torsion spring 76 ′ is The first connecting arm 73 is configured to exert an urging force upward, that is, in a direction in which the grindstone 13 is separated from the workpiece W. The two torsion springs 76 and 76 ′ according to the third embodiment exert a biasing force in a direction in which the grindstone 13 of the electric tool 11 is separated from the workpiece W in a normal state where no external force is applied. (See FIG. 13). When a force that presses the electric tool 11 downward against the balanced biasing force of the two torsion springs 76 and 76 ′ is applied to the electric tool 11, the grindstone 13 comes close to the workpiece W, The grindstone 13 can be ground on the workpiece W.

  Furthermore, the two torsion springs 76, 76 'according to the third embodiment are each provided with a spring force adjusting mechanism for adjusting the spring force. More specifically, as shown in FIG. 13 and FIG. 15 as an example, the spring force adjustment mechanism is in accordance with the spring force adjustment levers 82 and 82 ′ and the rotational operation of the spring force adjustment levers 82 and 82 ′. And spring force adjusting cams 83 and 83 ′ that rotate. When the spring force adjusting levers 82 and 82 'are rotated, the fixed root positions of the torsion springs 76 and 76' change due to the cam-shaped action of the spring force adjusting cams 83 and 83 '. According to this, the spring force of the torsion springs 76 and 76 ′ can be easily changed.

[Fourth embodiment]
In the electric tool devices 10, 50, 70 with operation aids according to the first to third embodiments described above, the front ends of the horizontal surface plates 32, 52, 72 constituting the operation aids 31, 51, 71 are It was designed to be a position slightly lower than the lower side of the grindstone 13, that is, a position behind the contact position between the workpiece W and the grindstone 13. However, the shape of the horizontal surface plate is not limited to that exemplified in the first to third embodiments. For example, it is also possible to adopt a configuration in which the front end of the horizontal surface plate is disposed at a position ahead of the contact position between the workpiece W and the grindstone 13. As an example of such a configuration, FIGS. 16 to 19 are shown. Here, FIG. 16 is a view showing a longitudinal section of the power tool device with operation aid according to the fourth embodiment, and FIG. 17 is a view showing a GG section in FIG. FIG. 18 is a top view of the main part of the horizontal surface plate according to the fourth embodiment. Further, FIG. 19 is a diagram illustrating a tool retracting mechanism included in the operation assisting tool according to the fourth embodiment.

  The power tool device 90 with an operation assisting tool according to the fourth embodiment is used in sliding contact with a workpiece W that is a horizontal plane, whereby a horizontal surface plate 92 that defines the relative position of the grindstone 13 with respect to the workpiece W, and this horizontal An operation auxiliary tool 91 including two first and second connection arms 93 and 94 that connect the surface plate 92 and the electric tool 11 is provided.

  The first connection arm 93 located on the side of the grindstone 13 is a pair of arm portions 93b (only one is depicted in FIG. 16) formed extending from the gear case 14 toward the horizontal surface plate 92, and these. It is comprised by the rod part 93c which connects a pair of arm part 93b. One end side of the pair of arm portions 93b is securely connected to the gear case 14 with screws, while the other end side of the pair of arm portions 93b is the rod side 93c installation side to the horizontal surface plate 92. The rod portion 93c is installed in a groove shape of the formed lock plate 102 (see the partial diagrams (a) in FIGS. 18 and 19). Thereby, the connection relationship between the horizontal surface plate 92 and the power tool 11 by the first connection arm 93 on the grindstone 13 side is maintained. In addition, about the screw | thread which connects the one end side of a pair of arm part 93b, and the gear case 14, the screw used in order to connect the gear case 14 and the housing 12 is combined. With this configuration, the number of parts can be reduced and a cost reduction effect can be obtained.

  As shown in FIG. 17, the second connection arm 94 located on the rear side of the housing 12, that is, on the anti-grinding stone 13 side of the power tool 11, with respect to the circumferential portion 94 a surrounding the housing 12 and the horizontal surface plate 92. A pair of extending leg portions 94b and 94c are provided, and the circumferential portion 94a and the pair of leg portions 94b and 94c are formed as one member. The second connection arm 94 includes a rod portion 94d that connects the pair of feet 94b and 94c.

  Here, as a feature point of the fourth embodiment, the rod portion 94d is installed such that both shaft ends engage with a long hole 100 formed at the rear of the horizontal surface plate 92 (FIG. 17). The second connection arm 94 is configured to be rotatable relative to the horizontal surface plate 92 with the rod portion 94d as a rotation center. The rod portion 94d is provided with a nut 101 on one side of the shaft end so that the rod portion 94d can be fixed at an arbitrary position of the long hole 100. Therefore, the rod portion 94d is fixed at an arbitrary position of the long hole 100 by tightening the nut 101, and the second connection arm 94 is in a state of being freely rotatable in this fixed state. With this configuration, the rotational center of the rotational movement of the electric tool 11 can be moved to an arbitrary position, so that the contact angle of the grindstone 13 with respect to the workpiece W plane can be arbitrarily changed.

  As described above, in the power tool device 90 with operation aids according to the fourth embodiment, as a tool angle changing mechanism, the contact angle of the grindstone 13 with respect to the workpiece W plane can be arbitrarily changed. The rod portion 94d having the nut 101 and the long hole 100 are provided. By such an action of the tool angle changing mechanism, an optimum grindstone angle can be set according to various conditions such as the type, material, shape and compatibility with the workpiece W of the grindstone 13. Therefore, according to the electric tool device 90 with an operation aid according to the fourth embodiment, high machining quality can be obtained.

  The second connection arm 94 is provided with a fastening mechanism 94e in the vicinity of the boundary between the circulating portion 94a and the pair of feet 94b and 94c. The fastening mechanism 94e is constituted by a screw installed in the vicinity of the boundary. By rotating the screw clockwise, an interval near the boundary between the circulating portion 94a and the pair of feet 94b and 94c is narrowed. The second connection arm 94 is securely fixed to the housing 12 by the circumferential portion 94a tightening the housing 12. On the contrary, when the screw is rotated counterclockwise, the tightening force of the housing 12 by the rotating portion 94a is relaxed, and the housing 12 and the second connection arm 94 can be separated and adjusted in position.

  Further, a torsion spring 96 is installed in the vicinity of the connecting portion between the horizontal surface plate 92 and the second connecting arm 94 at a position that avoids the nut 101 included in the rod portion 94d. The torsion spring 96 is a member that functions as an urging force applying unit that urges the grindstone 13 in a direction away from the workpiece W. In a normal state where no external force is applied by the action of the torsion spring 96. The second connecting arm 94 is configured to exert an urging force in the direction in which the second connection arm 94 is rotated rearward with respect to the horizontal surface plate 92, that is, in the direction in which the grindstone 13 of the electric power tool 11 is separated from the workpiece W (see FIG. 16 states). On the other hand, when the force against the urging force of the torsion spring 96 is applied to the electric tool 11, the grindstone 13 comes close to the work W, and the grindstone 13 can be ground to the work W. .

  As for the range of the rotation operation of the electric tool 11 with the rod portion 94d of the second connection arm 94 as the rotation center, the maximum movable range is defined by the shape of the lock plate 102. In the operation assisting tool 91 according to the fourth embodiment, a proximity limit defining mechanism that defines a limit when the grindstone 13 approaches the workpiece W is installed, and the proximity limit between the grindstone 13 and the workpiece W, that is, the grinding depth. It is possible to prescribe. A specific configuration of the proximity limit defining mechanism will be described with reference to FIGS. 16 and 18.

  The proximity limit defining mechanism according to the fourth embodiment includes a proximity limit defining portion 97 having an inclined surface 97 a installed above the horizontal surface plate 92, and an adjustment screw shaft 98 screwed into the proximity limit defining portion 97. And is configured. The proximity limit defining portion 97 has a nut 97 b that is screwed with the adjustment screw shaft 98, and the upper surface of the horizontal surface plate 92 can be moved by rotating the adjustment screw shaft 98. Further, the proximity limit defining portion 97 is formed with a notch guide portion 97c that engages with a guide shaft 92a installed on the upper surface of the horizontal surface plate 92. The notch guide portion 97c has a sliding contact surface with the guide shaft 92a formed in the longitudinal direction of the horizontal surface plate 92. Therefore, when the adjusting screw shaft 98 is rotated, the proximity limit defining portion 97 is connected to the guide shaft 92a. It can move along the longitudinal direction of the horizontal surface plate 92 by the action of the notch guide portion 97c.

  Further, the inclined surface 97a included in the proximity limit defining portion 97 is configured to be positioned below the rod portion 93c included in the first connection arm 93. Further, the inclined surface 97a is positioned below the rod portion 93c. It is arranged so that it can move back and forth at a position that blocks the side. Accordingly, by rotating the adjustment screw shaft 98 and moving the proximity limit defining portion 97 back and forth, the inclined surface 97a of the proximity limit defining portion 97 changes the movable range on the lower side of the rod portion 93c. The lower limit range that can be moved becomes adjustable. Thereby, the proximity limit between the grindstone 13 and the workpiece W, that is, the grinding depth can be freely changed to an arbitrary condition value.

  In the proximity limit defining mechanism according to the fourth embodiment, the operation portion 98a of the adjustment screw shaft 98 is provided at a position slightly protruding from the rear end of the horizontal surface plate 92. The position can be easily moved. In the fourth embodiment, since the distance between the operating portion 98a of the adjustment screw shaft 98 and the screwed portion of the adjustment screw shaft 98 with the nut 97b is separated, the adjustment screw shaft 98 is stably operated. A shaft support member 99 is installed. By the action of the shaft support member 99, the adjustment screw shaft 98 is not bent during rotation, and the adjustment screw shaft 98 is stabilized.

  Moreover, in 4th embodiment, the horizontal surface plate 92 is comprised so that the front end may be arrange | positioned in the position ahead rather than the contact position of the workpiece | work W and the grindstone 13. FIG. Specifically, as shown in FIGS. 16 and 18, a substantially semicircular opening 103 is formed on the lower side of the grindstone 13, and the shape and opening position of the opening 103 is determined by the movement of the grindstone 13. It is determined in consideration of deviating from the locus and not contacting the grindstone 13. By arranging the front end of the horizontal surface plate 92 in front of the contact position between the workpiece W and the grindstone 13, the contact area between the horizontal surface plate 92 and the workpiece W increases. This improves the stability of the apparatus when used in sliding contact.

  Furthermore, as an advantageous feature of the operation assisting tool 91 according to the fourth embodiment, the operation assisting tool 91 includes a tool retracting mechanism. That is, as illustrated in FIGS. 18 and 19, the tool retraction mechanism according to the fourth embodiment is a member configured as a lock plate 102 that is installed on a horizontal surface plate 92 so as to be tiltable. . The lock plate 102 has a plurality of groove shapes for adjusting the position of the rod portion 93c of the first connection arm 93, and always securely locks the rod portion 93c in the groove shape. A torsion spring 102a for tilting the lock plate 102 is provided to move the rod portion 93c from one groove shape to another groove shape. The reason why the lock plate 102 as such a tool retracting mechanism is installed is that the front end of the horizontal surface plate 92 is positioned forward of the grindstone 13. That is, in the case of the fourth embodiment, since the front end of the horizontal surface plate 92 protrudes forward of the grindstone 13, there is a possibility that it is difficult to perform the exchanging work of the grindstone 13. In order to improve such a situation, in the operation assisting tool 91 according to the fourth embodiment, the position of the rod portion 93c is changed from the normal position shown in the partial diagram (a) in FIG. 19 to the partial diagram (c). By moving the power tool 11 in a direction away from the horizontal surface plate 92 by moving it to a higher position than shown, it is possible to secure a space around the grindstone 13 and facilitate replacement of the grindstone.

  The specific configuration of the operation assisting tool 91 according to the fourth embodiment has been described above. Then, operation | movement of the operation assistance tool 91 which concerns on 4th embodiment is demonstrated.

  In the operation assisting tool 91 according to the fourth embodiment, in a normal state where no external force is applied, the second connection arm 94 rotates backward with respect to the horizontal surface plate 92 by the action of the torsion spring 96. An urging force is applied in the moving direction, and the grindstone 13 side of the electric tool 11 is in a state of receiving the urging force in a direction away from the horizontal surface plate 92. From such a normal state, the horizontal surface plate 92 is arranged on the horizontal surface of the workpiece W, and the proximity limit between the grindstone 13 and the workpiece W is adjusted by pinching and rotating the operation portion 98a of the adjustment screw shaft 98. Can do. Although not shown in the drawing, it is possible to configure the graduation depth converted from the adjustment position of the inclined surface 97a by installing a scale on the adjustment screw shaft 98 or the like.

  By determining the proximity limit between the grindstone 13 and the workpiece W, that is, the grinding depth in the above procedure, the electric power tool 11 is pressed in the direction of the workpiece W, whereby the workpiece W can be ground. . In the fourth embodiment, since the grinding depth of the grindstone 13 is defined by the action of the proximity limit defining mechanism including the proximity limit defining portion 97 and the adjustment screw shaft 98, the depth greater than the set value. In addition, grinding is not performed. Further, if the pressing force in the workpiece W direction against the electric tool 11 is released, the grindstone 13 receives the urging force in the direction away from the workpiece W due to the action of the torsion spring 96 and retreats from the horizontal surface plate 92. The rotating tool and the workpiece come into contact with each other, and there is no problem that the workpiece is damaged or the tool is damaged. Furthermore, since the operation assisting tool 91 according to the fourth embodiment includes the rod portion 94d having the nut 101 as the tool angle changing mechanism and the long hole 100, the type, material, shape, and workpiece W of the grindstone 13 are shown. The optimum grindstone angle can be set according to various conditions such as compatibility with. Therefore, according to the electric tool device 90 with an operation aid according to the fourth embodiment, high machining quality can be obtained.

  Moreover, in the electric tool device 90 with an operation assistance tool according to the fourth embodiment, when the grindstone 13 is exchanged, the lock plate 102 is separated from the partial view (a) in FIG. Furthermore, if the position of the rod part 93c which the 1st connection arm 93 has is moved upwards by setting it as the state of a partial drawing (c), if the grindstone 13 side of the electric tool 11 is tilted in the direction away from the horizontal surface plate 92, Good. By this operation, a space around the grindstone 13 is secured, so that the grindstone replacement operation can be facilitated.

[Fifth embodiment]
20 to 24 are views for explaining an electric tool device 110 with an operation assisting tool according to the fifth embodiment. Here, FIG. 20 is an external side view of the power tool device with operation aids according to the fifth embodiment, and FIG. 21 is a power tool with operation tools according to the fifth embodiment shown in FIG. It is a figure which shows the longitudinal cross-section of an apparatus. FIG. 22 is a diagram showing a cross section taken along line HH in FIG. 21, and FIG. 23 is a schematic diagram of the main part for explaining the main part of the operation assisting tool according to the fifth embodiment. 24 is a diagram showing a top view of the main part of the operation assisting tool according to the fifth embodiment.

  In the electric tool devices 10, 50, 70, 90 with operation aids according to the first to fourth embodiments described above, the horizontal surface plates 32, 52, 72, 92 and the second connection arms 34, 54, 74, 94 are provided. The configuration in which the torsion springs 36, 56, 76, 96 are installed in the vicinity of the connecting portion to the above is illustrated. However, by urging the grindstone 13 as a tool in the direction of separating from the work W, the urging force applying means used for separating the electric tool 11 from the work W in a normal state is the same as that of the horizontal surface plate. You may make it provide in the connection part vicinity with one connection arm.

  Specifically, like the operation assisting tool 111 shown in FIGS. 20, 21, 23, and 24, the coil spring 116 is installed between the first connection arm 113 and the horizontal surface plate 112, so that By always urging the tool 11 upward and applying a downward external force against the urging force of the coil spring 116 to the electric tool 11, it is possible to perform grinding on the workpiece W by the grindstone 13.

  In addition, regarding the tool angle changing mechanism for adjusting the inclination angle of the grindstone 13, in the second to fourth embodiments described above, the rod portions 54d, 74d, and 94d at arbitrary positions of the long holes 60, 80, and 100. The nuts 61, 81, and 101 are used to fix the nuts. However, in order to improve the operability of the fastening and fixing means represented by these nuts, as shown in FIGS. A rotation knob 121 may be provided.

  In the second connection arms 34, 54, 74, and 94 in the first to fourth embodiments described above, a configuration in which each member has rod portions 34d, 54d, 74d, and 94d is employed. However, the second connection arm according to the fifth embodiment shown in FIGS. 22 and 24 can be used as long as the power tool 11 and the horizontal surface plate 112 are connected and the operation as the tool angle changing mechanism can be realized. It is also possible to employ a configuration that does not have a rod portion as in 114.

[Sixth embodiment]
FIG. 25 and FIG. 26 show a modified form of the electric tool device with operation aids 110 according to the fifth embodiment described above. Here, FIG. 25 is a view showing a longitudinal section of the power tool device with an operation aid according to the sixth embodiment, and FIG. 26 is a view showing a II section in FIG. 25.

  In the fifth embodiment described above, the configuration in which the coil spring 116 is installed between the first connection arm 113 and the horizontal surface plate 112, that is, the configuration in which the urging force applying means is provided on the front side of the apparatus is exemplified. The sixth embodiment shown in FIGS. 25 and 26 also has a configuration in which an urging force applying means is provided on the front side of the apparatus, but the sixth embodiment has a coil spring as the urging force applying means. The another form of the 1st connection arm installed is illustrated.

  In the electric tool device with operation assistance tool 130 according to the sixth embodiment, the operation assistance tool 131 is used in sliding contact with the workpiece W that is a horizontal plane, thereby defining the horizontal position that defines the relative position of the grindstone 13 with respect to the workpiece W. An operation assisting tool 131 including a panel 132 and two first and second connection arms 133 and 134 that connect the horizontal surface plate 132 and the power tool 11 is provided.

  As shown in FIG. 26, the second connection arm 134 located on the rear side of the housing 12, that is, on the anti-grinding stone 13 side of the power tool 11, with respect to the surrounding part 134 a surrounding the housing 12 and the horizontal surface plate 132. A pair of extending leg portions 134b and 134c are provided, and the circumferential portion 134a and the pair of leg portions 134b and 134c are formed as one member. The second connection arm 134 includes a rod portion 134d that connects the pair of feet 134b and 134c.

  The rod part 134d is installed with both shaft ends engaged with a long hole 140 formed at the rear of the horizontal surface plate 132 (see FIG. 26), and is connected to the horizontal surface plate 132 with a second connection. The arm 134 is configured to be relatively rotatable about the rod part 134d as a rotation center. Moreover, the nut 141 is installed in the one side of the axial end so that the rod part 134d can be fixed in the arbitrary positions of the long hole 140 (refer FIG. 26). Therefore, the rod portion 134d is fixed at an arbitrary position of the long hole 140 by tightening the nut 141, and the second connection arm 134 is in a state of being freely rotatable in this fixed state. With this configuration, the rotational center of the rotational movement of the electric tool 11 can be moved to an arbitrary position, so that the contact angle of the grindstone 13 with respect to the workpiece W plane can be arbitrarily changed.

  As described above, in the power tool device with operation aids 130 according to the sixth embodiment, as a tool angle changing mechanism, the contact angle of the grindstone 13 with respect to the workpiece W plane can be arbitrarily changed. The rod portion 134d having the nut 141 and the long hole 140 are provided. By such an action of the tool angle changing mechanism, an optimum grindstone angle can be set according to various conditions such as the type, material, shape and compatibility with the workpiece W of the grindstone 13. Therefore, according to the power tool device 130 with an operation aid according to the sixth embodiment, high machining quality can be obtained.

  The second connection arm 134 is provided with a fastening mechanism 134e in the vicinity of the boundary between the rotating portion 134a and the pair of feet 134b and 134c. The fastening mechanism 134e is constituted by a screw installed near the boundary. By rotating the screw clockwise, the interval near the boundary between the circulating portion 134a and the pair of feet 134b and 134c is narrowed. As the circumferential portion 134a tightens the housing 12, the second connection arm 134 is securely fixed to the housing 12. Conversely, when the screw is rotated counterclockwise, the tightening force of the housing 12 by the rotating portion 134a is relaxed, and the housing 12 and the second connection arm 134 can be separated and adjusted in position.

  On the other hand, the first connection arm 133 located on the grindstone 13 side is a member that is connected to the electric power tool 11 and is installed on the horizontal surface plate 132 via a coil spring 146. An adjustment screw shaft 145 for allowing the effective movable range of the coil spring 146 to be changed is screwed into the first connection arm 133 according to the sixth embodiment. By rotating the adjustment screw shaft 145 and adjusting the screw shaft length of the adjustment screw shaft 145 protruding downward from the first connection arm 133, the effective movable range of the coil spring 146, that is, the rod portion 134d is adjusted. It becomes possible to arbitrarily adjust the lower limit position in the turning operation of the electric tool 11 with the turning center.

  Further, by the action of the coil spring 146, in a normal state where no external force is applied, a biasing force is exerted on the horizontal surface plate 132 in a direction in which the grindstone 13 of the electric power tool 11 is separated from the workpiece W (FIG. 25). On the other hand, when a force against the urging force of the coil spring 146 is applied to the electric power tool 11, the grindstone 13 comes close to the work W, and the grind processing of the work W by the grindstone 13 is possible. It becomes a state.

  As described above, in the power tool device with operation aids 130 according to the sixth embodiment, the proximity limit defining mechanism including the first connection arm 133, the coil spring 146, and the adjustment screw shaft 145 is installed. Such a proximity limit defining mechanism has a very simple configuration and a configuration that allows easy adjustment work. Therefore, it is advantageous in that it is possible to provide an electric tool device with an operation assisting tool that is low in cost and excellent in operability. This is preferable in that the effect can be exhibited.

  The specific configuration of the operation assisting tool 131 according to the sixth embodiment has been described above. Then, operation | movement of the operation assistance tool 131 which concerns on 6th embodiment is demonstrated.

  In the operation assisting tool 131 according to the sixth embodiment, in a normal state where no external force is applied, the first connection arm 133 is biased upward with respect to the horizontal surface plate 132 by the action of the coil spring 146. Thus, the grindstone 13 side of the electric power tool 11 is in a state of receiving the urging force in a direction away from the horizontal surface plate 132. From such a normal state, the proximity limit between the grindstone 13 and the workpiece W can be adjusted by arranging the horizontal surface plate 132 on the horizontal surface of the workpiece W and pinching and rotating the adjusting screw shaft 145. Although not shown, for example, a grinding depth can be determined by installing a scale on the adjustment screw shaft 145 or the like.

  By determining the proximity limit between the grindstone 13 and the workpiece W, that is, the grinding depth in the above procedure, the electric power tool 11 is pressed in the direction of the workpiece W, whereby the workpiece W can be ground. . In the sixth embodiment, the grinding depth of the grindstone 13 is defined by the action of the proximity limit defining mechanism including the coil spring 146, the adjustment screw shaft 145, and the like. No grinding process is performed. Further, if the pressing force in the workpiece W direction against the electric power tool 11 is released, the grindstone 13 receives the urging force in the direction away from the workpiece W by the action of the coil spring 146 and moves away from the horizontal surface plate 132. There is no problem that the inner tool and the workpiece come into contact with each other and the workpiece is damaged or the tool is damaged. Furthermore, since the operation assisting tool 131 according to the sixth embodiment includes the rod portion 134d having the nut 141 as a tool angle changing mechanism and the long hole 140, the type, material, shape, and workpiece W of the grindstone 13 are determined. The optimum grindstone angle can be set according to various conditions such as compatibility with. Therefore, according to the power tool device 130 with an operation aid according to the sixth embodiment, high machining quality can be obtained.

  As mentioned above, although preferred embodiment of this invention was described, the technical scope of this invention is not limited to the range as described in said each embodiment. Various modifications or improvements can be added to the above embodiments. For example, in the power tool devices 10, 50, 70, 90, 110, and 130 with operation aids according to the first to sixth embodiments described above, the case where the power tool 11 is configured as a portable grinder is exemplified. I explained. However, the electric tool applicable to the present invention is not limited to one configured as a portable grinder. That is, the operation tool 31 applied to a power tool 151 having a cylindrical grindstone 153 as illustrated in FIG. 27, a power tool 161 having a polishing belt 163 as illustrated in FIG. It is also possible to configure as an electric tool device 150, 160 with an operation assisting tool provided with 31 '(the operation assisting tool 31, 31' is substantially the same as the operation assisting tool 31 according to the first embodiment). The description is omitted because it has a configuration.) It is apparent from the description of the scope of claims that embodiments with such changes or improvements can be included in the technical scope of the present invention.

[Seventh embodiment]
The above-described power tool devices 10, 50, 70, 90, 110, and 130 with operation assisting tools according to the first to sixth embodiments are used with horizontal surface plates 32, 52, 72, and 92 that are used in sliding contact with the workpiece W. , 112, 132. The power tool device with operation aids 170 according to a seventh embodiment to be described next exemplifies a mode in which a member in contact with the workpiece W is configured by a roller. Therefore, the power tool device with operation aids 170 according to the seventh embodiment will be described with reference to FIGS. 29 and 30. Here, FIG. 29 is a figure which shows the longitudinal cross-section of the electric tool apparatus with an operation assistance tool which concerns on 7th embodiment, FIG. 30 is a figure which shows the JJ cross section shown in FIG.

  As shown in FIG. 29 and FIG. 30, an electric tool device with operation aids 170 according to the seventh embodiment includes an electric tool 11 that performs processing on a workpiece W to be processed, and the electric tool. 11, an operation assisting tool for an electric power tool device (hereinafter referred to as “operation assisting tool”) 171 installed. In this specification, the case where the electric tool 11 is configured as a portable grinder will be described as an example. First, the schematic configuration of the electric power tool 11 according to the seventh embodiment will be described below.

  The electric tool 11 according to the seventh embodiment is an apparatus configured as a portable grinder as shown in FIG. 29, and is made of a resin formed in a substantially cylindrical shape so that an operator can hold it with one hand. The housing 12 is provided. Moreover, this electric tool 11 has a disk-shaped grindstone 13 which is a tool for performing a grinding operation.

  The resin-made housing 12 is formed in a substantially cylindrical shape so as to function as a gripping part that is gripped by the operator's hand, and a metal gear case 14 is connected to the front end of the housing 12 serving as the gripping part. Has been. And the grindstone 13 as a tool which will perform grinding work is arrange | positioned with respect to the lower part of this gear case 14. As shown in FIG.

  Further, as shown in FIG. 29 depicting the internal structure of the electric tool 11, a motor 15 serving as a drive source for driving the grindstone 13 is accommodated in the housing 12. The motor 15 is arranged such that the axis of the motor shaft 16 substantially overlaps the axis of the cylindrical housing 12. Further, the front end portion 16 a of the motor shaft 16 protrudes from the housing 12 into the gear case 14 and is pivotally supported by a front bearing 17 fixed in the gear case 14, and the rear end portion 16 b of the motor shaft 16 is supported by the housing 12. The rear part 18 is pivotally supported at the rear part. Therefore, the motor shaft 16 is configured to be able to rotate at high speed by pivotally supporting the both end portions 16a and 16b by the front and rear bearings 17 and 18.

  A cooling fan 19 is installed on the front end 16 a side of the motor shaft 16 so as to be accommodated in the housing 12. The cooling fan 19 is arranged in the housing 12 and plays a role of passing cooling air through the central portion of the housing 12. That is, a gap is provided between the motor 15 and the inner wall surface of the housing 12, and an air intake hole (not shown) is formed on the rear end side of the housing 12, and the gear is connected to the front end of the housing 12. The case 14 has an exhaust hole (not shown). Then, when the cooling fan 19 rotates together with the motor shaft 16, outside air is taken into the housing 12 from an intake hole (not shown), cools the motor 15 and the like through a gap in the housing 12, and then is exhausted (not shown). ) Will be discharged outside the machine.

  A commutator 20 is attached to the rear end portion 16 b of the motor shaft 16, and a brush (not shown) attached to the housing 12 is in contact with the commutator 20. The commutator 20 and the brush (not shown) are also cooled by the cooling air taken in from the air inlet (not shown) by the action of the cooling fan 19 described above.

  Further, as shown in FIG. 29, a small bevel gear 22 fixed to the front end portion 16 a of the motor shaft 16 and a large bevel gear 23 that meshes with the small bevel gear 22 are accommodated in the gear case 14. The large bevel gear 23 is fixed to a drive shaft 25 that is vertically supported in the gear case 14 via a bearing 24. The drive shaft 25 protrudes below the gear case 14, and the grindstone 13 extends to the protruding portion. Is configured to be detachably fixed. When the motor 15 rotates, this rotational driving force is transmitted from the motor shaft 16 to the small bevel gear 22 and the large bevel gear 23, and the grinding wheel 13 is finally rotated to perform grinding on the workpiece W. .

  An unillustrated on / off switch and the like are housed on the rear side of the housing 12, and the motor 15 rotates or stops when the operator switches the on / off switch. It is possible to perform operations. That is, when the operator holds the housing 12 with one hand and turns on an on / off switch (not shown) with the finger of the other hand, the motor 15 rotates and the motor shaft 16 rotates the small bevel gear 22 and the large bevel gear 23. Power is transmitted to and the grindstone 13 rotates. Thereby, it can grind with respect to the workpiece | work W which is a workpiece. At this time, since the cooling fan 19 rotates simultaneously with the rotation of the motor shaft 16, outside air is taken into the housing 12 from an intake hole (not shown) of the housing 12. The outside air passes through the gap between the inner wall surface of the housing 12 and the motor 15 to cool the heat sources such as the motor 15, the commutator 20, and a brush (not shown), and then passes through the casing 12 to exhaust the gear case 14. Since it is discharged out of the machine through a hole (not shown), safe and stable operation of the electric tool 11 is realized. When the grinding operation is completed and the operator turns off an on / off switch (not shown), the motor 15 stops and the grindstone 13 stops rotating.

  The schematic configuration of the power tool 11 according to the seventh embodiment has been described above. Next, the operation assistance tool 171 installed in the electric tool 11 which is a main constituent member of the electric tool device with operation assistance tool 170 according to the seventh embodiment will be described.

  The operation assisting tool 171 according to the seventh embodiment includes rollers 177 and 178 that roll and move on the workpiece W that is a horizontal plane, and does not have a horizontal surface plate. Specifically, it has two first and second connection arms 173 and 174 connected to the electric power tool 11.

  The first connection arm 173 located on the grindstone 13 side is a member formed to extend from the gear case 14 in the direction of the workpiece W. A long hole 175 extending in the vertical direction is formed at the lower end of the first connection arm 173, and a roller 177 is rotatably installed in the long hole 175. Further, a torsion spring 179 is installed between the first connection arm 173 and the roller 177, and the first connection arm 173 is biased upward with respect to the roller 177 installed on the workpiece W. Therefore, in the normal state, the power tool 11 according to the seventh embodiment is configured to receive a biasing force in a direction away from the workpiece W.

  On the other hand, the second connection arm 174 located on the rear side of the housing 12, that is, on the anti-grinding stone 13 side of the electric tool 11 is connected to the housing 12 of the electric tool 11 on the upper side, and a roller 178 is rotatably installed on the lower side. Has been. The second connection arm 174 according to the seventh embodiment is not provided with a mechanism for arbitrarily changing its length and angle, and is merely provided with a roller 178 that can freely roll at a lower position.

  The specific configuration of the operation assisting tool 171 according to the seventh embodiment has been described above. Then, operation | movement of the operation assistance tool 171 which concerns on 7th embodiment is demonstrated.

  In the operation assisting tool 171 according to the seventh embodiment, in a normal state where no external force is applied, the electric tool 11 is attached in a direction in which the electric tool 11 is separated upward from the surface of the workpiece W by the action of the torsion spring 179. A force is applied, and the grindstone 13 side of the power tool 11 is in a state of receiving a biasing force in a direction away from the surface of the workpiece W. Note that the inclination of the power tool 11, that is, the inclination angle of the grindstone 13 can be changed by adjusting the positions of the rollers 177 and 178 installed on the lower ends of the first connection arm 173 and the second connection arm 174, respectively. Is possible. From such a normal state, the workpiece W can be ground by pressing the electric tool 11 against the spring force of the torsion spring 179 in the direction of the workpiece W.

  In the operation assisting tool 171 according to the seventh embodiment, the tilting range of the electric power tool 11 is defined by the shape of the long hole 175. However, various configurations can be employed for the mechanism that defines the tilting range of the power tool 11. For example, FIG. 31 and FIG. 32 are diagrams illustrating a form different from the operation assisting tool 171 according to the seventh embodiment, but the electric tool device 180 with the operation assisting tool described in FIG. 31 and FIG. , The first connection arm 183 of the operation assisting tool 181 is composed of two members, and is connected to be tiltable by a torsion spring 189, and an adjustment knob 184 is provided on one of the two first connection arms 183. On the other hand, a stopper-shaped portion 185 that comes into contact with the adjustment knob 184 is provided. Accordingly, a desired tilt range can be defined by adjusting the protruding amount of the adjustment knob 184, which is preferable. Note that the roller diameter of the roller 187 installed on the first connection arm 183 and the roller 178 installed on the second connection arm 174 may be arbitrary, such as adopting the same diameter or different diameters. The form of can be adopted.

[Eighth embodiment]
The above-described power tool devices 10, 50, 70, 90, 110, and 130 with operation assisting tools according to the first to sixth embodiments are used with horizontal surface plates 32, 52, 72, and 92 that are used in sliding contact with the workpiece W. , 112, 132. Moreover, the power tool device with operation aids 170 according to the seventh embodiment described above and the modification example (180) exemplify a mode in which a member in contact with the workpiece W is configured by rollers 177, 178, 187. It was something to do. The power tool device with an operation assisting tool according to the eighth to eleventh embodiments described below has a corner platen that is used in sliding contact with the corner shape in order to grind the corner portion of the workpiece W. is there. Therefore, first, the power tool device with operation aids 210 according to the eighth embodiment having the corner surface plate 212 will be described with reference to FIGS.

  Here, FIG. 33 is an external side view of the electric tool device with operation assisting tool according to the eighth embodiment, and FIG. 34 is an electric tool with operation assisting tool according to the eighth embodiment shown in FIG. It is a figure which shows the longitudinal cross-section of an apparatus. FIG. 35 is a main part top view showing the main parts of the corner surface plate and its peripheral members included in the power tool device with operation aids according to the eighth embodiment. Furthermore, FIG. 36 is a figure for demonstrating the cross-sectional shape of the surface plate for corners which the electric tool apparatus with an operation assistance tool which concerns on 8th embodiment has, and has shown the PP cross section in FIG. . Furthermore, FIG. 37 is a figure which shows the state at the time of grindstone replacement | exchange of the electric tool apparatus with an operation assistance tool which concerns on 8th embodiment.

  As shown in FIG. 33 and FIG. 34, the power tool device with operation aids 210 according to the eighth embodiment includes a power tool 11 that performs processing on a workpiece W to be processed, and the power tool. 11, the power tool device operation assisting tool (hereinafter, referred to as “operation assisting tool”) 211. In addition, about the electric tool 11, since it is comprised as a portable grinder demonstrated in embodiment mentioned above, the same code | symbol is attached | subjected and description is abbreviate | omitted. Then, the operation assistance tool 211 installed in the electric tool 11 which is a main component member of the electric tool apparatus with operation assistance tool 210 according to the eighth embodiment will be described.

  The operation assisting tool 211 according to the eighth embodiment is used in sliding contact with the corner portion of the workpiece W, whereby the corner surface plate 212 that defines the relative position of the grindstone 13 with respect to the workpiece W, and the corner surface plate. The connection arm 214 connects the 212 and the electric tool 11, and the proximity limit defining mechanism 213 that regulates the proximity limit between the corner surface plate 212 and the electric tool 11.

  The corner surface plate 212 is formed such that a corner top 212a formed at approximately 90 degrees faces upward as shown in FIG. Further, the corner surface plate 212 has slopes 212b and 212b formed extending from the corner top part 212a in the diagonally downward direction on the left and right, and these slopes 212b and 212b are substantially the same as those of the grindstone 13 in a top view. It extends to the same length as the width (see FIG. 35). By having such a configuration, the corner surface plate 212 is configured to be in sliding contact with the corner portion of the workpiece W, and when the electric tool device with operation assisting device 210 is placed on the corner portion of the workpiece W. In addition, a stable installation state is realized.

  Furthermore, the corner surface plate 212 according to the eighth embodiment is formed with an opening 212c so that the movement locus of the grindstone 13 that moves when the electric tool 11 tilts and the corner surface plate 212 do not come into contact with each other. Has been. When the power tool device with operation aids 210 according to the eighth embodiment is placed on the corner portion of the workpiece W, the corner portion of the workpiece W appears from the opening portion 212c. 13 can be ground.

  The proximity limit defining mechanism 213 located on the grindstone 13 side includes a fixed arm 213c attached to the gear case 14, a screw shaft 213b attached to the tip of the fixed arm 213c, and an operation for rotating the screw shaft 213b. Part 213a.

In the proximity limit defining mechanism 213, when the operation portion 213a is rotated, the protruding amount of the screw shaft 213b protruding from the lower side of the fixed arm 213c can be adjusted. The tip of the screw shaft 213b (on the side opposite to the operation portion 213a) comes into contact with a receiving portion 212d provided on the corner surface plate 212. Therefore, the proximity limit of the grindstone 13 with respect to the workpiece W is defined by adjusting the protruding amount of the screw shaft 213b from the lower side of the fixed arm 213c. Incidentally, the screw shaft 213b is a member composed of a nut 213b ₂ Metropolitan screwed with the screw 213b ₁ into the screw 213b _1, the nut 213b ₂ is non-rotatable relative to the fixed arm 213c. The action of the coil spring 213d that urges the nut 213b ₂ provides an effect of preventing the nut 213b ₂ from loosening, and the amount of protrusion of the screw shaft 213b adjusted by rotating the operation portion 213a is stabilized.

  On the other hand, the connection arm 214 located on the rear side of the housing 12, that is, on the anti-grinding stone 13 side of the electric tool 11, connects the electric tool 11 and the corner surface plate 212 in a tiltable manner, as shown in FIG. The arm portion 214a, a stopper portion 214b that can change the fixing position of the arm portion 214a, and a torsion spring 214c installed between the arm portion 214a and the stopper portion 214b.

Of these, the torsion spring 214c is configured to impart a spring force to press constantly on the rear side of the device the connection arm 214 through the connection shaft 214a ₁ of the arm portion 214a and the corner plate 212. On the other hand, the stopper portion 214b, the induction openings 214b ₁ is formed to conduct fixing shaft 214a ₂ which is formed on the arm portion 214a. The guide opening 214b ₁ has a linear passage shape and a concave shape formed by bending from the passage shape so as to hook and fix the fixed shaft 214a ₂ formed on the arm portion 214a. And is formed to have a substantially L-shape (detailed in FIG. 34).

FIG. 34 shows a state in which the power tool device with operation assistance tool 210 according to the eighth embodiment is normally used, but the fixed shaft 214a ₂ formed on the arm portion 214a is a concave shape of the guide opening 214b ₁ . the is located in places where the fixed shaft 214a ₂ is by receiving an urging force to the rear of the device from the torsion spring 214c, the normal state of the power tool 11 is maintained.

When the stopper portion 214b is pushed up obliquely forward and upward from the normal state shown in FIG. 34, as shown in FIG. 37, the fixed shaft 214a located at the recessed portion of the guide opening portion 214b ₁ is shown. _2, so that the relative movement to the rear portion of the portion in which the linear path shape of the guiding openings 214b ₁ by moving the induction openings 214b _1. By pushing this way stopper portion 214b, the power tool 11 it means that the tool side is moved upward as the pivot center connection axis 214a _1, it can ensure a wide spacing between the grinding wheel 13 and the corner plate 212 It becomes possible to make a state in which the grinding wheel can be easily replaced. The state in which the tool side of the electric power tool 11 is moved upward as shown in FIG. 37 has a linear passage shape of the guide opening 214b _{1 due to} the urging force that the fixed shaft 214a ₂ receives from the torsion spring 214c. Since it is reliably pressed against and fixed to the rear portion of the place, even if the grindstone 13 is replaced, it is stably maintained.

  Therefore, in the eighth embodiment, the screw shaft 213b and the receiving portion 212d are separated in a state where the screw shaft 213b does not receive an external force, and the electric tool 11 is positioned in a direction away from the workpiece W. By pressing the electric tool 11 downward from the initial position, the workpiece W can be ground by the grindstone 13. The proximity limit of the grindstone 13 by the proximity limit defining mechanism 213 according to the eighth embodiment is defined by the contact between the screw shaft 213b and the receiving portion 212d, so that the grindstone 13 exceeds the adjusted proximity limit. There is no approach to the workpiece W. Therefore, according to the eighth embodiment, there is no problem of excessive grinding.

  In the eighth embodiment, the torsion spring 214c always exerts an urging force in the direction in which the grindstone 13 is separated from the workpiece W. The urging force by the torsion spring 214c is a device around the proximity limit defining mechanism 213. Therefore, the grindstone 13 of the power tool 11 does not come into contact with the workpiece W in the normal state. However, the urging force of the torsion spring 214c can be arbitrarily changed and adjusted, and the initial position of the electric tool 11 can be adjusted by selecting the torsion spring 214c.

  The specific configuration of the operation assisting tool 211 according to the eighth embodiment has been described above. Then, operation | movement of the operation assistance tool 211 which concerns on 8th embodiment is demonstrated.

  In the operation assisting tool 211 according to the eighth embodiment, in the normal state where no external force is applied, the electric tool 11 is operated by the action of the torsion spring 214c and the action of the weight of the devices around the proximity limit defining mechanism 213. Since the grindstone 13 is moved and fixed in a direction away from the workpiece W, a stable initial state as shown in FIG. 33 is maintained.

  From this state, the amount of protrusion of the screw shaft 213b protruding from the lower side of the fixed arm 213c can be adjusted by rotating the operation portion 213a, so that the proximity limit between the grindstone 13 and the workpiece W is adjusted. can do. In addition, although not shown in figure, it can comprise so that the proximity limit of the grindstone 13 and the workpiece | work W can be grasped | ascertained by installing a scale with respect to the operation part 213a.

  By determining the proximity limit of the grindstone 13 and the workpiece W, that is, the grinding depth in the above procedure, and pressing the electric tool 11 in the direction of the workpiece W, it is possible to grind the workpiece W by the grindstone 13. Become. In the eighth embodiment, the grinding depth of the grindstone 13 is defined by the action of the proximity limit defining mechanism 213 including the screw shaft 213b and the receiving portion 212d. Is never done. Further, if the pressing force in the workpiece W direction against the electric power tool 11 is released, the grindstone 13 is retracted to a position separated from the workpiece W by the action of the torsion spring 214c, so that the rotating tool and the workpiece come into contact with each other. Therefore, there is no problem that the work W is wrinkled or the tool is damaged.

[Ninth Embodiment]
Heretofore, the power tool device with operation assistance tool 210 according to the eighth embodiment has been described. However, the modified embodiment can be adopted as appropriate for the eighth embodiment described with reference to FIGS. For example, a configuration in which the arrangement positional relationship of the stopper portion 214b described in the eighth embodiment is changed, such as the power tool device with operation assisting tool 220 according to the ninth embodiment shown in FIGS. You can also

  Therefore, with reference to FIG. 38 to FIG. 40, the power tool device 220 with an operation aid according to the ninth embodiment having the corner surface plate 212 will be described. Here, FIG. 38 is an external side view of the power tool device with operation assisting tool according to the ninth embodiment, and FIG. 39 is a power tool with operation assisting tool according to the ninth embodiment shown in FIG. It is a figure which shows the longitudinal cross-section of an apparatus. Moreover, FIG. 40 is a figure which shows the state at the time of grindstone replacement | exchange of the electric tool apparatus with an operation assistance tool which concerns on 9th embodiment. In addition, about the member which is the same as that of the member demonstrated in 8th embodiment, or similar, the same code | symbol may be attached | subjected and description may be abbreviate | omitted.

  The operation assisting tool 221 according to the ninth embodiment is used in sliding contact with the corner portion of the workpiece W, whereby the corner surface plate 212 that defines the relative position of the grindstone 13 with respect to the workpiece W, and the corner surface plate. The connection arm 214 connects the 212 and the electric tool 11, and the proximity limit defining mechanism 213 that regulates the proximity limit between the corner surface plate 212 and the electric tool 11.

The connection arm 214 according to the ninth embodiment is a member located on the rear side of the housing 12, that is, the anti-abrasive stone 13 side of the power tool 11, and as shown in FIGS. 38 and 39, an arm portion 214a which connects the corner plate 212 tiltably, with links connecting the fixed shaft 212a ₂ having connecting shaft 214a ₃ and the corner plate 212 having arm portions 214a there is, of the arm portions 214a It comprises a stopper part 214b whose fixing position can be changed, and a torsion spring 214c installed between the arm part 214a and the stopper part 214b.

Of these, the torsion spring 214c is configured to impart a spring force to press constantly on the rear side of the device the connection arm 214 through the connection shaft 214a ₁ of the arm portion 214a and the corner plate 212. On the other hand, the stopper portion 214b, the induction openings 214b ₁ to conduct fixing shaft 212a ₂ formed on the corner plate 212 is formed. The guide opening 214b ₁ has a concave shape formed by bending a portion having a linear passage shape and a fixed shaft 212a ₂ formed on the corner surface plate 212 by hooking and fixing the portion. And has a substantially L-shape (detailed in FIGS. 38 and 39).

FIG. 38 shows a state in which the power tool device with operation assisting tool 220 according to the ninth embodiment is normally used, but the fixed shaft 212a ₂ formed on the corner surface plate 212 has the guide opening 214b ₁ . The fixed shaft 212a ₂ is located in the recessed portion, and the fixed shaft 212a ₂ receives the urging force from the torsion spring 214c to the rear of the device, so that the fixed fitting state in the recessed portion in the guide opening 214b ₁ is maintained. Thus, the normal state of the electric power tool 11 is maintained.

From the normal state shown in FIG. 38, when the stopper portion 214b is pushed upward while being raised above the apparatus, the fixed portion located at the recessed portion of the guide opening portion 214b ₁ is fixed as shown in FIG. The shaft 212a ₂ moves forward in the guide opening 214b ₁ after deviating from the recess shape, and is pressed against the front portion of the guide opening 214b _{1 where} the linear passage shape is formed. By thus operating the stopper portion 214b, since the electric power tool 11 will be the tool side is moved upward as the pivot center connection axis 214a _1, spacing is wide secure the grinding wheel 13 and the corner plate 212 This makes it possible to create a state as shown in FIG. The state in which the tool side of the power tool 11 as shown in FIG. 40 moves upward, and the linear path shape of the guiding openings 214b ₁ by the action of the biasing force which the fixed shaft 212a ₂ receives from the torsion spring 214c Since it is firmly fixed by being pressed against the front part of the place, even if the grindstone 13 is replaced, it is stably maintained.

  As mentioned above, although preferred embodiment of this invention was described, the technical scope of this invention is not limited to the range as described in the said embodiment. Various modifications or improvements can be added to the above embodiments. For example, in the above-described eighth and ninth embodiments, the power tool devices with operation aids 210 and 220 having the corner surface plate 212 have been described. However, in these embodiments, the inclination angle of the tool with respect to the workpiece is described. It was not equipped with a tool angle changing mechanism that makes the tool freely changeable. However, it is possible to provide a tool angle changing mechanism also to the power tool devices with operation aids 210 and 220 exemplified in the eighth and ninth embodiments. Specifically, as shown in FIG. 41, the arm part 214a described in the ninth embodiment is further divided into two parts, and a long hole 232 and a screw 231 are installed, so that the length of the divided arm part 214a is divided into two. By making the height freely changeable, a function as a tool angle changing mechanism can be added. It is apparent from the description of the scope of claims that embodiments with such changes or improvements can be included in the technical scope of the present invention.

[Tenth embodiment]
In the electric tool devices with operation aids 210 and 220 according to the eighth and ninth embodiments described above, a configuration is adopted in which the arm portion 214a of the connection arm 214 is constantly pressed to the rear side of the device by the torsion spring 214c. It was. However, the pressing direction by the torsion spring may be reversed. Therefore, by using FIGS. 42 to 46, the tenth embodiment having a configuration in which the arm portion 314a of the connection arm 314 is constantly pressed to the front side of the apparatus by the torsion spring 314c will be described.

  Here, FIG. 42 is an external side view of the power tool device with operation aids according to the tenth embodiment, and FIG. 43 is a power tool with operation tools according to the tenth embodiment shown in FIG. It is a figure which shows the longitudinal cross-section of an apparatus. FIG. 44 is a main part top view showing the main parts of the corner surface plate and its peripheral members included in the power tool device with operation aids according to the tenth embodiment. Furthermore, FIG. 45 is a figure for demonstrating the cross-sectional shape of the surface plate for corners which the electric tool apparatus with an operation assistance tool which concerns on 10th Embodiment has, and the fractional drawing (a) in a figure is in FIG. The LL cross section of this is shown, and the fractional drawing (b) has shown the MM cross section in FIG. Furthermore, FIG. 46 is a figure which shows the state at the time of the grindstone replacement | exchange of the electric tool apparatus with an operation assistance tool which concerns on 10th Embodiment.

  As shown in FIGS. 42 and 43, the power tool device with operation aids 310 according to the tenth embodiment includes a power tool 11 that performs processing on a workpiece W to be processed, and the power tool. 11, the power tool device operation assisting tool (hereinafter referred to as “operation assisting tool”) 311. In addition, about the electric tool 11, since it is comprised as a portable grinder demonstrated in embodiment mentioned above, the same code | symbol is attached | subjected and description is abbreviate | omitted. Therefore, the operation assisting tool 311 installed in the electric power tool 11, which is a main component of the electric tool device with operation assisting tool 310 according to the tenth embodiment, will be described.

  The operation assisting tool 311 according to the tenth embodiment is used in sliding contact with the corner portion of the workpiece W, whereby the corner surface plate 312 that defines the relative position of the grindstone 13 with respect to the workpiece W, and the corner surface plate. The connecting arm 314 connects the 312 and the power tool 11, and the proximity limit defining mechanism 313 that defines the proximity limit between the corner surface plate 312 and the power tool 11.

  The corner surface plate 312 is formed such that a corner top 312a formed at approximately 90 degrees faces upward as shown in FIG. Further, the corner surface plate 312 has slopes 312b and 312b formed extending from the corner top 312a in a diagonally downward direction on the left and right, and these slopes 312b and 312b are substantially the same as those of the grindstone 13 in a top view. It extends to the same length as the width (see FIG. 44). By having such a configuration, the corner surface plate 312 is configured to come into sliding contact with the corner portion of the workpiece W, and when the electric tool device 310 with an operation assisting tool is placed on the corner portion of the workpiece W. In addition, a stable installation state is realized.

  Furthermore, the corner platen 312 according to the tenth embodiment is formed with an opening 312c so that the movement locus of the grindstone 13 that moves when the electric tool 11 tilts does not contact the corner platen 312. Has been. When the power tool device with operation aid 310 according to the tenth embodiment is placed on the corner portion of the workpiece W, the corner portion of the workpiece W appears from the opening portion 312c. 13 can be ground.

  The proximity limit defining mechanism 313 located on the grindstone 13 side includes a fixed arm 313c attached to the gear case 14, a screw shaft 313b attached to the tip of the fixed arm 313c, and an operation for rotating the screw shaft 313b. Part 313a.

In the proximity limit defining mechanism 313, when the operation portion 313a is rotated, the protruding amount by which the screw shaft 313b protrudes from the lower side of the fixed arm 313c can be adjusted. The tip of the screw shaft 313b (on the side opposite to the operation portion 313a) comes into contact with a receiving portion 312d provided on the corner surface plate 312. Therefore, by adjusting the protrusion amount of the screw shaft 313b from the lower side of the fixed arm 313c, the inclination of the electric tool 11 in the normal state, that is, the initial position of the grindstone 13 and the workpiece W is determined. It becomes. Incidentally, the screw shaft 313b is a member composed of a nut 313b ₂ Metropolitan screwed with the screw 313b ₁ into the screw 313b _1, the nut 313b ₂ is non-rotatable relative to the fixed arm 313c. The action of the coil spring 313d that urges the nut 313b ₂ provides the effect of preventing the nut 313b ₂ from loosening, and the amount of protrusion of the screw shaft 313b adjusted by rotating the operation portion 313a is stabilized.

  Therefore, when the screw shaft 313b is in contact with the receiving portion 312d in a state where no external force is received, the grindstone 13 of the electric tool 11 is disposed at a position closest to the workpiece W, and pushes the electric tool 11 upward. Thus, the workpiece W can be retreated. That is, the control of the grinding process on the workpiece W by the grindstone 13 is realized by the tilting operation control of the power tool 11 by the operator. In addition, since the proximity limit of the grindstone 13 by the proximity limit defining mechanism 313 according to the tenth embodiment is defined by the contact between the screw shaft 313b and the receiving portion 312d, the grindstone 13 exceeds the adjusted proximity limit. Since the workpiece W is not approached, there is no problem that the workpiece W is excessively ground beyond the set grinding depth.

On the other hand, the connection arm 314 located on the rear side of the housing 12, that is, the anti-grinding stone 13 side of the electric power tool 11, connects the electric power tool 11 and the corner surface plate 312 in a tiltable manner as shown in FIG. and the arm portion 314a, together with the linking connection between the fixed shaft 312a ₂ having fixed shaft 314a ₂ and the corner plate 312 having arm portions 314a there is a stopper portion 314b to freely change the fixing position of the arm portion 314a, It is comprised from the torsion spring 314c installed between the arm part 314a and the stopper part 314b.

Of these, the torsion spring 314c is configured to impart a spring force to press constantly on the front side of the device the connection arm 314 through the connection shaft 314a ₁ of the arm portion 314a and the corner plate 312. On the other hand, the stopper portion 314b is formed with a guide opening 314b ₁ that conducts the fixed shaft 314a ₂ formed in the arm portion 314a. The guide opening 314b ₁ has a linear passage-shaped portion and a concave shape formed by bending from the passage shape to hook and fix the fixed shaft 314a ₂ formed on the arm portion 314a. And is formed to have a substantially L-shape (detailed in FIG. 43).

FIG. 43 shows a state in which the power tool device with operation aids 310 according to the tenth embodiment is normally used, but the fixed shaft 314a ₂ formed on the arm portion 314a is linear with the guide opening portion 314b ₁ . The fixed shaft 314a ₂ receives the urging force from the torsion spring 314c to the front of the device, so that the normal state of the electric tool 11 is maintained.

When the stopper portion 314b is pushed down from the normal state shown in FIG. 43, the guide opening 314b ₁ is located at the upper portion of the linear passage-shaped portion as shown in FIG. the fixed shaft 314a ₂ becomes the fitted in positions in which the recessed shape of the guiding openings 314b ₁ induction openings 314b ₁ relative movement. By pushing down the stopper portion 314b in this manner, the power tool 11 moves upward with the connecting shaft 314a ₁ as the center of rotation, so that a wide space between the grindstone 13 and the corner surface plate 312 can be secured. It becomes possible to make a state in which the grinding wheel can be easily replaced. Note that the state in which the tool side of the electric power tool 11 is moved upward as shown in FIG. 46 is certain with respect to the recessed portion of the guide opening 314b ₁ by the action of the urging force that the fixed shaft 314a ₂ receives from the torsion spring 314c. Therefore, even if the grindstone 13 is replaced, it is stably maintained.

  As above, the specific configuration of the operation assisting tool 311 according to the tenth embodiment has been described. Then, operation | movement of the operation assistance tool 311 which concerns on 10th embodiment is demonstrated.

  In the operation assisting tool 311 according to the tenth embodiment, in a normal state where no external force is applied, the arm portion 314a rotates forward relative to the corner surface plate 312 by the action of the torsion spring 314c. An urging force is applied in the direction in which the grindstone 13 is applied, and the grindstone 13 side of the electric power tool 11 is in a state of receiving the urging force in a direction approaching the corner surface plate 312. In such a normal state, the grindstone 13 of the power tool 11 is closest to the workpiece W by the action of the screw shaft 313b attached to the tip of the fixed arm 313c and the receiving portion 312d provided on the corner surface plate 312. It is arranged to be in the position.

  In such a state, by rotating the operation portion 313a, the amount of protrusion of the screw shaft 313b protruding from the lower side of the fixed arm 313c can be adjusted, so the proximity limit between the grindstone 13 and the workpiece W is adjusted. can do. In addition, although not shown in figure, it can comprise so that the proximity limit of the grindstone 13 and the workpiece | work W, ie, the grinding depth with respect to the workpiece | work W, can be grasped | ascertained by installing a scale with respect to the operation part 313a. .

  By determining the proximity limit of the grindstone 13 and the workpiece W, that is, the grinding depth in the above procedure, and operating the electric tool 11 in the vertical direction (that is, the proximity / separation direction) with respect to the workpiece W, It becomes possible to grind the workpiece W. In the tenth embodiment, since the grinding depth of the grindstone 13 is defined by the action of the proximity limit defining mechanism including the screw shaft 313b and the receiving portion 312d, the grinding process is performed to a depth equal to or greater than the set value. Never done.

[Eleventh embodiment]
In the above, the electric tool apparatus 310 with an operation assistance tool which concerns on 10th Embodiment which has the surface plate 312 for a corner was demonstrated. However, the form that can be taken by the power tool device with operation aids having the corner platen is not limited to the tenth embodiment described with reference to FIGS. 42 to 46. For example, like the electric tool device 320 with an operation assisting tool according to the eleventh embodiment shown in FIGS. 47 to 50, the arrangement position of the stopper portion 314b with respect to the arm portion 314a in the tenth embodiment is changed. A configuration can also be adopted.

  Therefore, with reference to FIG. 47 to FIG. 50, the power tool device 320 with operation aids according to the eleventh embodiment having the corner surface plate 312 will be described. Here, FIG. 47 is an external side view of the electric tool device with operation assisting tool according to the eleventh embodiment, and FIG. 48 is with the operation assisting tool according to the eleventh embodiment shown in FIG. It is a figure which shows the longitudinal cross-section of an electric tool apparatus. FIG. 49 is a diagram showing an NN cross section in FIG. Furthermore, FIG. 50 is a diagram illustrating a state when the grindstone is replaced in the power tool device with operation aids according to the eleventh embodiment. Note that members that are the same as or similar to the members described in the tenth embodiment may be assigned the same reference numerals and descriptions thereof may be omitted.

  The operation assisting tool 321 according to the eleventh embodiment is used in sliding contact with the corner portion of the workpiece W, whereby the corner surface plate 312 that defines the relative position of the grindstone 13 with respect to the workpiece W, and the corner setting plate. The connecting arm 314 connects the panel 312 and the electric tool 11, and the proximity limit defining mechanism 313 that regulates the proximity limit between the corner surface plate 312 and the electric tool 11.

  The connection arm 314 according to the eleventh embodiment is a member located on the rear side of the housing 12, that is, on the anti-grinding stone 13 side of the electric tool 11, and as shown in FIGS. And the corner plate 312 are tiltably connected to each other, a stopper portion 314b for changing the fixing position of the arm portion 314a, and a torsion installed between the arm portion 314a and the stopper portion 314b. And a spring 314c.

Of these, the torsion spring 314c is configured to impart a spring force to press constantly on the front side of the device the connection arm 314 through the connection shaft 314a ₁ of the arm portion 314a and the corner plate 312. On the other hand, the stopper portion 314b is formed with a guide opening 314b ₁ that conducts the fixed shaft 312a ₂ formed on the corner surface plate 312. The guide opening 314b ₁ has a concave shape formed by bending a portion having a straight passage shape and a fixed shaft 312a ₂ formed on the corner surface plate 312 so as to be hooked and fixed. And has a substantially L-shape (detailed in FIGS. 47 and 48).

FIG. 47 shows a state in which the power tool device with operation aids 320 according to the eleventh embodiment is normally used. The fixed shaft 312a ₂ formed on the corner surface plate 312 has a guide opening 314b _1. The fixed shaft 312a ₂ receives the urging force from the torsion spring 314c to the front of the device, so that the rear portion of the passage shape in the guide opening 314b _{1 is} located. The arrangement at is maintained, and the normal state of the electric power tool 11 is maintained.

When the stopper portion 314b is pushed backward from the normal state shown in FIG. 47, the guide opening 314b ₁ is located at the rear portion of the linear passage-shaped portion as shown in FIG. the fixed shaft 312a ₂ becomes to fit the portion where the recessed shape of the guiding openings 314b ₁ through the induction openings 314b ₁ relative move forward. By pushing the stopper portion 314b in this way, the power tool 11 moves upward with the connection shaft 314a ₁ as the center of rotation, so that a wide space between the grindstone 13 and the corner surface plate 312 can be secured. Thus, it becomes possible to make a state where the grindstone 13 can be easily replaced. Note that the state in which the tool side of the electric power tool 11 is moved upward as shown in FIG. 50 is certain with respect to the recessed portion of the guide opening 314b ₁ by the action of the urging force that the fixed shaft 312a ₂ receives from the torsion spring 314c. Therefore, even if the grindstone 13 is replaced, it is stably maintained.

  As mentioned above, although preferred embodiment of this invention was described, the technical scope of this invention is not limited to the range as described in the said embodiment. Various modifications or improvements can be added to the above embodiments. It is apparent from the description of the scope of claims that embodiments with such changes or improvements can be included in the technical scope of the present invention.

  W Work, 10 Electric tool device with operation aid according to first embodiment, 11 Electric tool, 13 Grinding wheel, 15 Motor, 31 Operation aid according to first embodiment, 31 'Operation aid, 33c Rod part , 36 Torsion spring, 37a Inclined surface, 50 Electric tool device with operation assisting tool according to the second embodiment, 51 Operation assisting tool according to the second embodiment, 53c Rod portion, 56 Torsion spring, 57a Inclined surface, 60 Long hole, 61 nut, 70 Electric tool device with operation assisting tool according to the third embodiment, 71 Operation assisting tool according to the third embodiment, 76, 76 'Torsion spring, 80 Long hole, 81 Nut, 82' Spring force adjusting lever, 83 'Spring force adjusting cam, 90 Electric tool device with operation assisting tool according to the fourth embodiment, 91 Operation assisting tool according to the fourth embodiment, 93c Rod part, 96 torsion spring, 97a inclined surface, 100 long hole, 101 nut, 102 lock plate, 102a torsion spring, 110 Electric tool device with operation aid according to fifth embodiment, 111 according to fifth embodiment Operation assisting tool, 116 coil spring, 121 rotating knob, 130 Electric tool device with operation assisting tool according to the sixth embodiment, 131 Operation assisting tool according to the sixth embodiment, 140 long hole, 141 nut, 145 For adjustment Screw shaft, 146 Coil spring, 150, 160 Electric tool device with operation assisting tool, 170 Electric tool device with operation assisting tool according to the seventh embodiment, 171 Operation assisting tool according to the seventh embodiment, 175 long hole, 179 Torsion spring, 180 Electric tool device with operation aid, 181 Operation aid, 184 Adjustment knob, 185 Stopper-shaped portion, 189 torsion spring, 210 power tool device with operation assisting tool according to the eighth embodiment, 211 operation assisting tool according to the eighth embodiment, 212d receiving portion, 213b screw shaft, 214 connection arm, 214a arm Part, 214c torsion spring, 220 power tool device with operation assisting tool according to the ninth embodiment, 221 operation assisting tool according to the ninth embodiment, 231 screw, 232 long hole, 310 operation according to the tenth embodiment Electric tool device with auxiliary tool, 311 Operation assisting tool according to tenth embodiment, 312d receiving portion, 313 proximity limit defining mechanism, 313b screw shaft, 314 connection arm, 320 with operation assisting tool according to eleventh embodiment Electric tool apparatus, 321 The operation assistance tool which concerns on 11th embodiment.

Claims (6)

It is installed in an electric tool that performs machining on a workpiece by transmitting a driving force from a driving source to the tool, and is used in sliding contact with the workpiece, thereby specifying the relative position of the tool with respect to the workpiece. An operation aid for a tool device,
An operation assisting tool for an electric power tool apparatus, comprising a proximity limit defining mechanism that regulates a limit when the tool approaches the workpiece. The operation tool for an electric tool device according to claim 1,
The operation limit tool for an electric tool device, wherein the proximity limit defining mechanism is capable of arbitrarily changing a proximity limit of the tool with respect to the workpiece. In the operation assistance tool for electric tool devices according to claim 1 or 2,
Urging force applying means for urging the tool in the direction of separating the tool from the workpiece, the urging force applying means,
Always, the tool is arranged to receive a biasing force in a direction away from the workpiece,
The power tool device operation assisting tool is configured such that when a force that resists the urging force is applied, the tool is brought into close proximity to the workpiece to perform processing on the workpiece. In the operation assistance tool for electric tool devices according to any one of claims 1 to 3,
An operation assisting tool for an electric power tool apparatus, comprising a tool angle changing mechanism that freely changes an inclination angle of the tool with respect to the workpiece. In the operation assistance tool for electric tool devices according to any one of claims 1 to 4,
An operation assisting tool for an electric tool device, comprising a tool retracting mechanism for retracting the tool from the operation assisting tool when the tool is exchanged. An electric tool that performs machining on the workpiece by transmitting the driving force from the driving source to the tool;
An operation assisting tool that defines the relative position of the tool with respect to the workpiece by being used in sliding contact with the workpiece while being installed on the electric tool,
An electric tool device with an operation aid comprising:
The power tool device with an operation assisting tool, wherein the operation assisting tool includes a proximity limit defining mechanism that defines a limit when the tool approaches the workpiece.

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