JP2014037040A - Electric rotary tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric rotary tool for rotating a mounted tip tool by a motor so that a work piece may be worked by the tip tool, in which the arrangement position of a shoe or battery is set in view of the handling of the user so that the handling as the electric rotary tool may be improved.SOLUTION: A charging type battery 15 is mounted on a battery mounting portion 13 by sliding the battery 15 in the downward direction along the vertical direction perpendicularly intersecting the longitudinal direction. As a result, the charging type battery 15 can be mounted by sliding the same in the downward direction intersecting the longitudinal direction, in which an electric rotary tool 10 extends. Here, a shoe 17 is moved in the longitudinal direction so that it can be displaced relative to a tool body 11. As a result, the arrangement structure of the shoe 17 can be aligned with the direction, in which a front side housing 31 extends.

Description

  The present invention relates to an electric rotary tool that rotates an attached tip tool with a motor and processes a workpiece with the tip tool.

  2. Description of the Related Art Conventionally, there is known an electric rotary tool that is also called a dust-proof boat trimmer or a cut-out tool and is used for a processing operation such as a gypsum board cutting operation (for example, see Patent Document 1). This type of electric rotary tool includes a drive motor that generates a rotational drive force, and an output spindle (output shaft) that is rotationally driven by the rotational drive force of the drive motor. An attachment mechanism for attaching a machining bit (tip tool) is disposed at the tip of the output spindle. A bit selected in accordance with processing such as the above-described cutting processing is attached to the attachment mechanism. This attachment mechanism is configured so that it can be replaced with various bits. In addition, the conventional replacement of the bit is performed by loosening and tightening the attachment mechanism by using a dedicated tool such as a spanner.

"Instruction Manual Dust-proof Board Trimmer Model 3706" (Issue Date: February 2006 Publisher: Makita Corporation)

  By the way, in such an electric rotary tool, a shoe for setting the protruding length of the tip tool held by the tool holding portion is provided. The shoe is attached so as to be relatively displaceable with respect to the housing. Moreover, in such an electric rotary tool, a rechargeable battery serving as a power source for the drive motor is mounted. For this reason, this electric rotary tool is provided with a battery mounting portion for mounting a battery.

  However, if a shoe or a battery is easily attached to the above-described electric rotary tool, the electric rotary tool may be unnecessarily bulky. For this reason, it is necessary to set the position for attaching the shoe and the battery without impairing the handling as the electric rotary tool.

  The present invention has been made in view of such circumstances, and the problem to be solved by the present invention is that the attached tip tool is rotated by a motor and the workpiece is processed by the tip tool. In the rotary tool, the arrangement position of the shoe and the battery is set in consideration of the handling of the user, and the handling as the electric rotary tool is made favorable.

In solving the above-described problems, the electric rotary tool according to the present invention takes the following means.
An electric rotary tool according to a first aspect of the present invention is configured to rotate in response to a rotational drive of the motor, a cylindrical housing extending in a first direction, a motor housed in the housing. And a tool holding portion protruding to the outside from one end side of the housing so as to hold the tip tool, and a protrusion length of the tip tool supported by the housing and held by the tool holding portion. An electric rotary tool having a shoe, wherein a battery mounting portion for mounting a battery is provided at the other end of the housing, and mounting of the battery to the battery mounting portion is performed in the first manner. It is characterized by being slid along a second direction extending in a direction intersecting with the direction. The first direction described above can be set as a direction along the rotation axis of the motor.
According to the electric rotating tool according to the first aspect of the invention, the battery is mounted on the battery mounting portion by sliding along the second direction extending in the direction intersecting the first direction. The battery can be mounted by sliding in a direction (second direction) that intersects the direction (first direction) extending as the tool. As a result, when the electric rotating tool extends in the horizontal direction, the battery can be mounted by sliding the battery in a direction crossing the horizontal direction. Therefore, according to this electric rotary tool, the battery can be easily mounted, and the handling as the electric rotary tool can be improved.

The electric rotary tool according to a second aspect of the invention is the electric rotary tool according to the first aspect of the invention, wherein the shoe can be displaced relative to the housing by moving along the first direction. It is characterized by being. In the electric rotary tool according to the second aspect of the invention, since the shoe is displaceable in the relative position with respect to the housing by moving along the first direction, the housing extends through the shoe arrangement structure. Can match the direction. As a result, the thickness structure of the electric rotary tool can be reduced, and the handling for the user is improved.
Moreover, the electric rotary tool which concerns on 3rd invention is the electric rotary tool which concerns on the said 1st or 2nd invention, The said housing is a lock | rock which controls the relative rotation of the said tool holding part with respect to the said housing. And a shoe fixing part that fixes a relative position of the shoe with respect to the housing, and the lock part and the shoe fixing part extend along the first direction. It is arrange | positioned in the arrangement position which becomes a mutually symmetrical direction with respect to an axis. According to the electric rotary tool according to the third aspect of the invention, the lock portion and the shoe fixing portion are disposed at positions that are symmetrical to each other with respect to the central axis of the housing extending along the first direction. Therefore, useless bulk in the first direction can be suppressed. As a result, the length structure of the electric rotary tool can be reduced, and the handling for the user is improved.
Moreover, the electric rotary tool which concerns on 4th invention is the electric rotary tool which concerns on the said 3rd invention. WHEREIN: The arrangement direction of the said lock part and the said shoe fixing | fixed part is the said 1st direction and the said 2nd direction. It is set in the 3rd direction extended in the direction which crosses both. According to the electric rotary tool according to the fourth aspect of the invention, the arrangement direction of the lock portion and the shoe fixing portion is set to the third direction extending in the direction intersecting both the first direction and the second direction. Therefore, the lock portion and the shoe fixing portion can be efficiently arranged in the three-dimensional direction, and wasteful bulk as an electric rotary tool is omitted, and the handling for the user is improved.

An electric rotary tool according to a fifth aspect of the invention is configured to rotate in response to a rotational drive of the motor, a cylindrical housing extending in the first direction, a motor housed in the housing. And a tool holding portion protruding to the outside from one end side of the housing so as to hold the tip tool, and a protruding length of the tip tool supported by the housing and held by the tool holding portion. An electric rotary tool having a shoe, wherein the shoe is displaceable in a relative position with respect to the housing by moving along the first direction. The shoe fixing means for fixing the position is configured to be fixed to the housing with one touch.
According to the electric rotary tool of the fifth aspect of the invention, the shoe can be displaced relative to the housing, and the shoe fixing means can be fixed to the housing with one touch (one operation). Therefore, when the position of the shoe is determined and fixed, it can be performed with one touch (one operation). As a result, the position of the shoe can be easily fixed, and the handling for the user is improved.

An electric rotary tool according to a sixth aspect of the invention is configured to rotate in response to a rotational drive of the motor, a cylindrical housing extending in the first direction, a motor housed in the housing. And a tool holding portion protruding to the outside from one end side of the housing so as to hold the tip tool, and a protruding length of the tip tool supported by the housing and held by the tool holding portion. An electric rotary tool having a shoe, wherein the housing fixes a lock portion that restricts relative rotation of the tool holding portion with respect to the housing, and a relative position of the shoe with respect to the housing. A shoe fixing portion, and the lock portion and the shoe fixing portion are symmetrical to each other with respect to a central axis of the housing extending along the first direction. The operation input unit related to the rotational drive of the motor is disposed in the housing in a direction intersecting with the arrangement direction of the lock unit and the shoe fixing unit. To do.
According to the electric rotary tool of the sixth aspect of the invention, the lock portion and the shoe fixing portion are disposed at positions that are symmetrical with respect to the central axis of the housing extending along the first direction. Therefore, useless bulk in the first direction can be suppressed. Thereby, slimming of the length structure can be achieved, and the handling for the user is improved. Here, since the operation input unit related to the rotational drive of the motor is arranged in the housing in a direction intersecting with the arrangement direction of the lock unit and the shoe fixing unit, the operation input unit is connected to the lock unit and the shoe fixing unit. It can be set efficiently without disturbing the arrangement space. Therefore, it can be configured efficiently in view of handling.

According to the electric rotary tool according to the first aspect of the invention, the battery can be easily attached, and the handling as the electric rotary tool can be improved.
According to the electric rotary tool according to the second aspect of the invention, the thickness structure can be slimmed, and the handling for the user is improved.
According to the electric rotary tool according to the third aspect of the invention, the length structure can be slimmed, and the handling for the user is improved.
According to the electric rotary tool according to the fourth aspect of the invention, unnecessary bulkiness is eliminated and handling for the user is improved.
According to the electric rotary tool according to the fifth aspect of the invention, the position of the shoe can be easily fixed, and the handling for the user is improved.
According to the electric rotary tool which concerns on 6th invention, it can comprise efficiently in view of handling.

It is an external appearance side view of an electric rotary tool. It is an internal sectional view which shows the inside of the electric rotary tool of FIG. FIG. 2 is an internal cross-sectional view showing the inside of the electric rotary tool of FIG. It is an expansion perspective view which expands and shows the part of the front side of an electric rotary tool. FIG. 3 is an enlarged internal cross-sectional view illustrating an output unit in FIG. 2. It is an internal sectional view at the time of operating the operation mechanism of FIG. It is the (a) perspective view and (b) sectional view about a tip insertion member. It is the (a) perspective view and (b) sectional view about a nut member. It is a perspective view which expands and shows the engagement holding mechanism shown in FIG. It is sectional drawing which expands and shows the engagement holding mechanism shown in FIG. It is sectional drawing which expands and shows the engagement holding mechanism shown in FIG. It is an external appearance side view of the electric rotary tool of 2nd Embodiment. It is an expansion perspective view which expands and shows the front part of the electric rotary tool of FIG. It is an internal sectional view which shows the inside of the electric rotary tool of FIG. It is an external appearance side view corresponding to FIG. 12 at the time of fixed cancellation | release. It is an expansion perspective view corresponding to FIG. 13 at the time of fixed cancellation | release. FIG. 15 is an internal cross-sectional view corresponding to FIG. 14 when the fixation is released. It is an external appearance side view of the electric rotary tool of 3rd Embodiment. It is an expansion perspective view which expands and shows the part of the front side of the electric rotary tool of FIG. It is an internal sectional view which shows the inside of the electric rotary tool of FIG. It is an external appearance side view corresponding to FIG. 18 at the time of fixed cancellation | release. FIG. 20 is an enlarged perspective view corresponding to FIG. 19 at the time of unlocking. FIG. 21 is an internal cross-sectional view corresponding to FIG. 20 when the fixation is released.

[First Embodiment]
Hereinafter, three embodiments will be described as modes for carrying out the electric rotary tool according to the present invention. In addition, the electric rotary tool demonstrated below is an electric rotary tool called what is called a cutout tool used for processing operations, such as a cutting operation of a gypsum board.
First, an electric rotary tool 10 according to a first embodiment for carrying out an electric rotary tool according to the present invention will be described with reference to FIGS. FIG. 1 is an external side view of the electric rotary tool 10. FIG. 2 is an internal cross-sectional view showing the inside of the electric rotary tool 10 of FIG. FIG. 3 is an internal cross-sectional view showing the inside of the electric rotary tool 10 of FIG. FIG. 4 is an enlarged perspective view showing the front portion of the electric rotary tool 10 in an enlarged manner. Note that the electric rotary tool 10 described below defines the top, bottom, front, rear, left and right of the electric rotary tool 10 as shown in the drawing for easy understanding. Moreover, in FIG. 1, only the tool main body 11 from which the rechargeable battery 15 was removed among the electric rotary tools 10 is illustrated. The electric rotary tool 10 is a so-called hand-held rotary electric rotary tool that is used by grasping with a hand.

That is, the electric rotary tool 10 shown in FIGS. 1 to 4 schematically includes a tool body 11, a rechargeable battery 15, and a shoe 17. The tool body 11 is configured to include a cylindrical housing. This housing includes a motor housing 21 that forms the housing of the drive unit 20 and a front housing 31 that forms the housing of the output unit 30. The motor housing 21 and the front housing 31 have a cylindrical shape extending in the front-rear direction, which is the first direction. A brush motor 25 is accommodated in the motor housing 21. In addition, the front-back direction regarding this electric rotary tool 10 corresponds to the first direction according to the present invention. Further, the vertical direction with respect to the electric rotary tool 10 corresponds to the second direction according to the present invention. The left-right direction with respect to the electric rotary tool 10 corresponds to the third direction according to the present invention. For this reason, the first direction is a direction in which the cylindrical shape of the motor housing 21 extends. Further, the second direction extends in a direction intersecting with the first direction. Further, the second direction extends in a direction intersecting with the first direction. The third direction extends in a direction that intersects both the first direction and the second direction.
The rechargeable battery 15 is attached to the tool body 11 as a power source for the electric rotary tool 10. The rechargeable battery 15 is charged by a dedicated charger (not shown) after being discharged by use. A battery mounting portion 13 is provided at the rearmost portion on the other end side of the tool body 11. The rechargeable battery 15 is mounted on the battery mounting portion 13 so as to slide from top to bottom. That is, the mounting of the rechargeable battery 15 on the battery mounting unit 13 is performed by sliding along the vertical direction (second direction) extending in the direction intersecting the front-rear direction (first direction). Yes.

The shoe 17 is disposed at the tip of the output spindle 35. The shoe 17 sets a processing protrusion amount of the bit B with respect to the shoe 17 by determining a relative position with respect to the tool body 11. That is, the shoe 17 sets the protruding length of the bit B held by the bit attachment mechanism 41. The protruding length of the bit B is a length associated with the workable range of the bit B. For this reason, the shoe 17 is disposed at the foremost part of the tool body 11 and is supported by the front housing 31.
The shoe 17 includes a shoe main body 171 that faces the workpiece, and an attachment portion 172 that is attached to the tool main body 11 by a knob screw 18. The shoe body 171 of the shoe 17 functions as an adjustment base according to the present invention. The shoe main body 171 and the mounting portion 172 extend in directions that intersect each other. The attachment portion 172 is provided with a long hole 173 that extends in the front-rear direction. The mounting portion 172 is guided to slide by a guide member 174 fixed to the front housing 31. Specifically, the front housing 31 is provided with a guide member 174 that is screw-fixed, and the guide member 174 is provided with a guide rib 175 that guides the slide of the mounting portion 172 in the front-rear direction. In this way, the shoe 17 can be displaced in the relative position with respect to the front housing 31 by moving along the front-rear direction.
The shoe 17 is slid in the front-rear direction with respect to the tool main body 11 and is fixed by a knob screw 18 at an appropriately determined position. Specifically, when the knob screw 18 is turned in the tightening direction, the mounting portion 172 of the shoe 17 acts to press the guide member 174. Then, the attachment portion 172 of the shoe 17 is pressed and fixed by the knob screw 18 so as to be integrated with the guide member 174. In this way, the shoe 17 is fixed to the tool body 11. Thus, the knob screw 18 corresponds to a shoe fixing portion according to the present invention, and has a function of fixing the shoe 17 whose relative position with respect to the tool body 11 including the motor housing 21 is determined.
Further, the bit B attached by the bit attachment mechanism 41 described later protrudes forward from the shoe 17 whose arrangement has been adjusted. The protruding length of the bit B is determined by the arrangement position of the shoe 17. The bit B corresponds to the cutting tool for machining according to the present invention. In addition, the mounting direction (vertical direction) of the rechargeable battery 15 and the arrangement adjustment direction (front-rear direction) of the shoe 17 are orthogonal to each other.

Next, the tool body 11 will be described. The tool body 11 is roughly divided into a drive unit 20 that mainly generates a driving force and an output unit 30 that supports the rotation of the output spindle 35. The drive part 20 is comprised over the rear part and intermediate part of the tool main body 11, and mainly converts electric power into rotational drive force. The drive unit 20 is generally configured by mounting various interior members in a motor housing 21 forming an exterior. As shown in FIG. 2, the motor housing 21 is formed in half in the left-right direction. The battery mounting portion 13 described above is provided at the rearmost portion of the motor housing 21. The motor housing 21 includes a controller 22, a switch 23, a brush motor 25, and a fan 29 in order from the back to the front. The controller 22 controls the power supply from the rechargeable battery 15 according to appropriate conditions. The switch 23 is input by a slide operation in the front-rear direction of the slide switch 231 exposed to the outside. Specifically, the slide switch 231 is formed long in the front-rear direction. When the user moves the slide switch 231 forward, the switch can be turned on by operating the rear end of the operation part of the switch 23 on the front surface of the rear end of the slide switch 231. The slide switch 231 corresponds to an operation input unit according to the present invention that inputs an operation related to the rotational drive of the brush motor 25. The slide switch 231 is disposed on the upper side of the motor housing 21. For this reason, this slide switch 231 is provided with respect to the motor housing 21 on the upper side in the direction extending in the vertical direction. In addition, the up-down direction with respect to the motor housing 21 is a direction intersecting with the left-right direction.
The brush motor 25 is configured similarly to a widely used brush motor, and corresponds to the motor according to the present invention. The brush motor 25 includes a motor shaft 26 that is rotationally driven. The motor shaft 26 is rotatably driven by a rear bearing 27 and a front bearing 28. The motor shaft 26 is provided with an output spindle 35 that receives the rotational driving force of the brush motor 25 from the proximal end side and holds the bit B on the distal end side. The rear bearing 27 is supported by the motor housing 21, and the front bearing 28 is supported by the front housing 31.
The fan 29 is attached to the motor shaft 26. The fan 29 is a centrifugal fan. Due to the rotation of the fan 29, wind flows from the rear to the front inside the motor housing 21. The wind from the fan 29 mainly functions as motor cooling air that cools the controller 22, the switch 23, and the brush motor 25 in order. For this reason, the wind introduced into the motor housing 21 is sucked from the air inlet 211 provided at the rear of the motor housing 21, and the controller 22, the switch 23, and the brush motor 25 are cooled in order, and then passed through the fan 29. It enters the inside of the front housing 31. Thus, the wind that has entered the inside of the front housing 31 is blown out from a blow-out port 36 provided on the front surface of the electric rotary tool 10 described later and exhausted to the outside. The air passage forms a flow path that is sucked into the tool main body 11 from the air inlet 211 by the fan 29 and exhausted to the outside of the tool main body 11 from the outlet 36. Note that this motor cooling air corresponds to the exhaust air according to the present invention, and this air passage corresponds to the first air passage according to the present invention. The outlet 36 is also included in the exhaust port according to the present invention provided on the front surface of the front housing 31.

Next, the output unit 30 disposed on the front side of the drive unit 20 will be described. 5 is an internal cross-sectional view showing the output unit 30 in FIG. 2 in an enlarged manner. FIG. 6 is an internal cross-sectional view when the operation mechanism 60 of FIG. 5 is operated.
As shown in FIGS. 5 and 6, the output unit 30 is configured as a front side portion of the tool body 11. The output unit 30 is a part of the electric rotary tool 10 that mainly holds and rotates the bit B. The output unit 30 generally includes a front housing 31, an output spindle 35, and a bit attachment mechanism 41. As shown in FIG. 4, the front housing 31 that forms the exterior of the output unit 30 is screwed to the front end of the motor housing 21 via four screw members 19 and is fixed by the motor housing 21. Unlike the motor housing 21 formed in half, the front housing 31 is a metal molded product formed integrally. The front housing 31 is provided with a shape opened at the rear and front. Therefore, as shown in FIG. 5 and the like, the motor shaft 26 can be inserted into the front housing 31 from the rear side, and the output spindle 35 can be protruded from the front side. The front housing 31 corresponds to a support housing according to the present invention.
As shown in FIG. 4 and the like, the front portion of the front housing 31 is provided with a blowout port 36 for blowing the motor cooling air to the outside. Four outlets 36 are provided at equal intervals along the circumferential direction on the front surface of the front housing 31. The outlet 36 is provided on the front surface of the electric rotary tool 10 so that the motor cooling air that is blown out faces the shoe main body 171 of the shoe 17. That is, the motor cooling air blown from the blowout port 36 is directed and applied to the workpiece processed by the bit B.

As shown in FIG. 5 and the like, the mounting portion 172 of the shoe 17 is attached to the right side surface of the front housing 31 via a knob screw 18. As shown in FIG. 3, a shaft lock mechanism 37 is provided on the left side surface of the front housing 31. In other words, the arrangement portion of the knob screw 18 to which the attachment portion 172 is attached and the arrangement portion of the shaft lock mechanism 37 are symmetric with respect to the central axis of the front housing 31 extending along the front-rear direction (first direction). It arrange | positions in the arrangement position so that it may become a direction. In other words, the arrangement direction formed by the arrangement part of the knob screw 18 and the arrangement part of the shaft lock mechanism 37 is set to the left-right direction intersecting both the front-rear direction and the vertical direction. The shaft lock mechanism 37 fixes the output spindle 35 so as to stop the movement of the output spindle 35 in the rotation direction when the bit B is attached to the bit attachment mechanism 41 described later. That is, the shaft lock mechanism 37 corresponds to a lock portion according to the present invention, and has a function of restricting relative rotation of the bit attachment mechanism 41 with respect to the front housing 31. Therefore, the shaft lock mechanism 37 includes an operating body 38 that can move a pin that can be inserted into one of the four holes of the output spindle 35 in a radial direction, and a biasing spring 39 that releases the pressure in a normal state. With. The operating body 38 includes an operating body main body 381 that presses the shaft and a pressing cover 382 that forms an exterior.
Incidentally, as shown in FIG. 5 and the like, the front end 261 of the motor shaft 26 protruding from the motor housing 21 to the front side enters the front housing 31. The front end 261 of the motor shaft 26 is press-fitted into a rear end fitting hole 351 provided at the rear end of the output spindle 35. For this reason, the output spindle 35 rotates integrally with the motor shaft 26 to be press-fitted. The output spindle 35 corresponds to the output shaft according to the present invention. A tip insertion member 45 described later is press-fitted into a tip fitting hole 352 provided at the tip of the output spindle 35. Here, a male screw portion 353 that is cut into a male screw shape is provided on the outer peripheral surface of the output spindle 35 into which the tip insertion member 45 is press-fitted. The male screw portion 353 is screwed with a female screw portion 513 of the nut member 51 described later. Thus, the output spindle 35 in which the motor shaft 26 and the tip insertion member 45 are integrated is supported by the bearing 28 for rotational driving. The bearing 28 is fixedly held by the front housing 31.

Next, the bit attachment mechanism 41 provided for the output spindle 35 will be described. The bit attachment mechanism 41 corresponds to a tool holding portion (attachment mechanism) according to the present invention. The bit attachment mechanism 41 corresponds to a fixing member according to the present invention. The bit attachment mechanism 41 attaches the bit B to the output spindle 35 that is rotationally driven. The bit attachment mechanism 41 generally includes a tip insertion member 45 and a nut member 51. The tip insertion member 45 corresponds to the insertion member according to the present invention. The nut member 51 corresponds to a fastening member according to the present invention.
That is, the bit attachment mechanism 41 is configured to rotate in response to the rotational drive of the brush motor 25. The bit attachment mechanism 41 is disposed so as to protrude from the front end side of the front housing 31 to the outside so that the bit B can be held. The front end side of the electric rotary tool 10 corresponds to one end side according to the present invention, and the rear end side opposite to this corresponds to the other end side according to the present invention.
FIG. 7A is a perspective view of the tip insertion member 45. FIG.7 (b) is (b)-(b) sectional drawing about the front-end | tip insertion member 45 illustrated by (a). FIG. 8A is a perspective view of the nut member 51. FIG.8 (b) is (b)-(b) sectional drawing about the nut member 51 illustrated by (a).
As shown in FIGS. 7A and 7B, the tip insertion member 45 to be press-fitted into the tip fitting hole 352 of the output spindle 35 is located on the rotation axis 40 (see FIG. 1 etc.) of the output spindle 35. The bit B is set as a fitting insertion hole that allows the bit B to be inserted. Specifically, the tip insertion member 45 has a hole shape that is provided with an opening 46 at the front end and communicates with the inside. The inner peripheral diameter of the tip insertion member 45 having the hole shape is formed so as to be able to be reduced so as to hold the bit B inserted into the tip insertion member 45. Specifically, the tip insertion member 45 is provided with four slits 451 extending in the direction of the rotation axis 40 at equal intervals. By the four slits 451 provided at equal intervals, the distal end insertion member 45 is formed to have four claw shapes that can swing inward and outward. Further, a tapered portion 452 having a tapered shape is provided in the vicinity of the front end of the outer peripheral surface of the tip insertion member 45.

As shown in FIG. 5 and the like, the nut member 51 is disposed on the outer periphery of the above-described tip insertion member 45. An opening 52 into which the bit B is inserted is provided at the front end of the nut member 51. A female screw portion 513 that is cut into a female screw shape is provided on the inner peripheral surface of the nut member 51 that is also shown in FIGS. The female screw portion 513 is screwed with a male screw portion 353 provided on the outer peripheral surface of the output spindle 35. Further, near the front end of the inner peripheral surface of the nut member 51, a reduced diameter portion 512 having an inclined shape that matches the tapered portion 452 is provided. The reduced diameter portion 512 is in contact with or not in contact with the tapered portion 452 of the tip insertion member 45 described above, depending on the screwing position of the female screw portion 513 with respect to the male screw portion 353. Or When the reduced diameter portion 512 is in contact with the tapered portion 452, when the nut member 51 is further screwed in the fastening direction with respect to the output spindle 35, the reduced diameter portion 512 is inserted into the distal end. The taper portion 452 of the member 45 is pressed inward. If it does so, the internal diameter of the front-end | tip of this front-end | tip insertion member 45 will act in a reduction | decrease direction. That is, the inner peripheral surface of the tip insertion member 45 presses the outer peripheral surface of the bit B so that the bit B inserted into the opening 46 is held by the tip insertion member 45. At this time, the nut member 51 is positioned at a position (bit gripping position) where the nut member 51 is screwed to the tip insertion member 45.
Further, when the nut member 51 is located at a position where the screw is removed from the tip insertion member 45 (bit removal position), the inner peripheral diameter of the tip insertion member 45 described above is the normal inner diameter. It becomes the circumference. The nut member 51 located at the bit removing position is arranged on the front side compared to the bit gripping position. At this time, the reduced diameter portion 512 of the nut member 51 is positioned without pressing the tapered portion 452 inward. For this reason, the inner peripheral surface of the tip insertion member 45 also does not press the outer peripheral surface of the bit B, and the bit B inserted into the inner peripheral side of the tip insertion member 45 is not gripped by the tip insertion member 45. . That is, this bit B is in a state where it can be inserted and removed from the tip insertion member 45. In this way, the reduced diameter portion 512 has the outer peripheral surface of the tip insertion member 45 on the inner side so as to reduce the inner diameter of the tip insertion member 45 in accordance with the screwing position of the female screw portion 513 with respect to the male screw portion 353. It can be pressed or not pressed. The rotation axis of the nut member 51 is the same rotation axis as the rotation axis 40 of the output spindle 35 described above.

As shown in FIG. 5 and the like, the nut member 51 is disposed on the outer periphery of the above-described tip insertion member 45. An opening 52 into which the bit B is inserted is provided at the front end of the nut member 51. A female screw portion 513 that is cut into a female screw shape is provided on the inner peripheral surface of the nut member 51 that is also shown in FIGS. The female screw portion 513 is screwed with a male screw portion 353 provided on the outer peripheral surface of the output spindle 35. Further, near the front end of the inner peripheral surface of the nut member 51, a reduced diameter portion 512 having an inclined shape that matches the tapered portion 452 is provided. The reduced diameter portion 512 is in contact with or not in contact with the tapered portion 452 of the tip insertion member 45 described above, depending on the screwing position of the female screw portion 513 with respect to the male screw portion 353. Or When the reduced diameter portion 512 is in contact with the tapered portion 452, when the nut member 51 is further screwed in the fastening direction with respect to the output spindle 35, the reduced diameter portion 512 is inserted into the distal end. The taper portion 452 of the member 45 is pressed inward. If it does so, the internal diameter of the front-end | tip of this front-end | tip insertion member 45 will act in a reduction | decrease direction. That is, the inner peripheral surface of the tip insertion member 45 presses the outer peripheral surface of the bit B so that the bit B inserted into the opening 46 is held by the tip insertion member 45. At this time, the nut member 51 is positioned at a position (bit gripping position) where the nut member 51 is screwed to the tip insertion member 45.
Further, when the nut member 51 is located at a position where the screw is removed from the tip insertion member 45 (bit removal position), the inner peripheral diameter of the tip insertion member 45 described above is the normal inner diameter. It becomes the circumference. The nut member 51 located at the bit removing position is arranged on the front side compared to the bit gripping position. At this time, the reduced diameter portion 512 of the nut member 51 is positioned without pressing the tapered portion 452 inward. For this reason, the inner peripheral surface of the tip insertion member 45 also does not press the outer peripheral surface of the bit B, and the bit B inserted into the inner peripheral side of the tip insertion member 45 is not gripped by the tip insertion member 45. . That is, this bit B is in a state where it can be inserted and removed from the tip insertion member 45. In this way, the reduced diameter portion 512 has the outer peripheral surface of the tip insertion member 45 on the inner side so as to reduce the inner diameter of the tip insertion member 45 in accordance with the screwing position of the female screw portion 513 with respect to the male screw portion 353. It can be pressed or not pressed. The rotation axis of the nut member 51 is the same rotation axis as the rotation axis 40 of the output spindle 35 described above.

Next, the operation mechanism 60 that enables the above-described bit attachment mechanism 41 to be operated will be described. The operation mechanism 60 corresponds to an operation unit according to the present invention. As shown in FIGS. 5 and 6, the operation mechanism 60 is provided with respect to the front housing 31. The operation mechanism 60 generally includes an engagement member 61, a stopper member 71, and a biasing spring 75. As shown in FIG. 4, the engaging member 61 is formed in a substantially annular shape. The engaging member 61 generally includes a guide part 62, a coupling part 63, and an engaging part 64. The guide part 62 functions to guide the slide of the engaging member 61. The guide portion 62 is formed in a double structure so that the guide peripheral edge 32 protruding from the front end of the front housing 31 is sandwiched between the outside and the inside. The guide peripheral edge 32 is formed in a substantially annular shape. Accordingly, the guide portion 62 also has a double structure of an outer peripheral ring 621 and an inner peripheral ring 622 having a substantially annular shape. The outer peripheral ring 621 and the inner peripheral ring 622 are coupled to each other so as to be folded back by the front folded portion 623. A coupling portion 63 is provided in the vicinity of the rear end edge of the inner circumferential ring 622 of the guide portion 62. The coupling portion 63 is coupled to a coupling portion 73 of a stopper member 71 described below. Specifically, the coupling portion 63 provided on the engagement member 61 has a female shape that fits with the male coupling portion 73 provided on the stopper member 71. Further, the inner peripheral surface of the inner peripheral ring 622 is formed as an engaging portion 64. The engaging portion 64 is formed to be engageable with the outer periphery of the nut member 51 described above. The engagement with the outer periphery of the nut member 51 with which the engaging portion 64 engages enables screw rotation along the rotation axis 40 of the nut member 51 (see FIG. 5 and the like).
As shown in FIG. 5, the rear end 624 of the outer peripheral ring 621 of the engaging member 61 and the front surface 311 of the front housing 31 are brought into contact with each other by the biasing force of the biasing spring 75. Thereby, it can suppress that dust penetrate | invades into the arrangement | positioning range of the biasing spring 75 mounted internally from the outside. Further, a protrusion 625 extending radially inward is provided on the inner peripheral side of the inner peripheral ring 622 of the engaging member 61. Further, the outer peripheral surface of the coupling portion 73 of the stopper member 71 and the inner peripheral surface of the coupling portion 63 of the inner peripheral ring 622 face each other. Here, the projecting portion 625 is disposed so as to close these gaps on the front end sides of the inner and outer peripheral surfaces of the coupling portions 63 and 73 facing each other. Thereby, it is difficult for dust to enter between the inner peripheral surface and the outer peripheral surface of the coupling portions 63 and 73 facing each other.

  The stopper member 71 is also formed in a substantially annular shape. This stopper member 71 generally includes a coupling portion 73 and an outer flange portion 74. The outer flange portion 74 is formed in an outer flange shape capable of sliding contact with the inner peripheral surface of the front housing 31. The outer flange portion 74 is a guide portion that guides sliding in the front-rear direction of the stopper member 71 including the engaging member 61 by sliding contact with the inner peripheral surface of the front housing 31. The outer flange portion 74 is also formed with a structure for holding the biasing spring 75. The coupling portion 73 has a male shape that fits into the coupling portion 63 provided in the above-described engagement member 61. That is, the stopper member 71 is coupled to the engaging member 61 by fitting the coupling portion 73 of the stopper member 71 to the coupling portion 63 of the engaging member 61. Thus, the stopper member 71 is integrated with the engaging member 61 and functions as a part of the engaging member 61. That is, the stopper member 71 constitutes the engaging member side according to the present invention. The outer flange portion 74 is disposed on the rear side of the coupling portion 73 and is formed in an outer flange shape. The rear end of the urging spring 75 serving as the other end of the urging spring 75 contacts the outer flange portion 74. The biasing spring 75 is a coil spring and corresponds to the elastic body according to the present invention. The biasing spring 75 biases the engaging member 61 so as to disengage the engaging member 61 from the bit attachment mechanism 41. The biasing spring 75 is held by the front housing 31 that holds the output spindle 35 described above. Specifically, the biasing spring 75 is disposed between the front housing 31 guide peripheral edge 32 and the inner peripheral ring 622 of the engaging member 61. The biasing spring 75 is in contact with the inner flange portion 33 whose front end is one end and which is on the front housing 31 side. The inner flange portion 33 is formed so as to protrude from the guide peripheral edge 32 toward the inner peripheral ring 622. The inner flange portion 33 corresponds to a protruding portion according to the present invention. Further, the urging spring 75 abuts the outer flange portion 74 whose rear end that is the other end is on the engagement member 61 side. In this way, the urging spring 75 urges both the engaging member 61 and the stopper member 71 on the engaging member 61 side toward the rear side of the tool body 11. Note that both ends of the urging spring 75 are slidably contacted with the inner flange portion 33 and the outer flange portion 74 with which both ends abut. The urging direction of the urging spring 75 constituting a part of the operation mechanism 60 is set to a direction orthogonal to the urging direction of the urging spring 39 constituting a part of the shaft lock mechanism 37.

By the way, the movement of the engaging member 61 and the stopper member 71 on the engaging member 61 side toward the rear side of the tool body 11 by the urging of the urging spring 75 causes the folded portion 623 of the engaging member 61 to be guided to the periphery of the guide. It is stopped by contacting the front end of 32. That is, the position where the engagement member 61 shown in FIG. 5 is stopped is the retracted position (P1) of the engagement member 61. The engaging member 61 in the retracted position (P1) is disengaged from the outer peripheral surface of the nut member 51 so that the nut member 51 cannot be screwed. On the other hand, as shown in FIG. 6, when the engaging member 61 is moved forward, the engaging portion 64 of the engaging member 61 is engaged with the outer periphery of the nut member 51. It becomes. The outer peripheral surface of the nut member 51 has a hexagonal prism shape.
Thus, when the engaging part 64 is engaged with the outer periphery of the nut member 51, the engaging member 61 is located at the engaging position (P2). Here, the engagement position (P2) is a position relatively moved away from the front housing 31 as compared with the retracted position (P1). Since the engaging member 61 located at the engaging position (P2) is engaged with the nut member 51, the nut member 51 is also integrated by rotating the engaging member 61 along the rotation axis 40. Can be rotated. That is, by rotating the engagement member 61, the nut member 51 can be rotated relative to the tip insertion member 45. Here, the relationship between the retracted position (P1) and the engaged position (P2) of the engaging member 61 is set by being shifted back and forth in the direction along the rotation axis 40 of the nut member 51. Specifically, the engagement position (P2) of the engagement member 61 is a position moved forward along the rotation axis 40 as compared to the retracted position (P1) of the engagement member 61.

Next, the engagement holding mechanism 80 will be described. The engagement holding mechanism 80 has a function of holding the engagement member 61 when the engagement portion 64 of the engagement member 61 is engaged with the outer periphery of the nut member 51 at the engagement position (P2). Note that the engagement member 61 is held at the engagement position (P2) by the engagement holding mechanism 80 until the engagement holding mechanism 80 is released. Further, the engaging member 61 located at this engaging position (P2) rotates the engaging member 61 along the rotation axis 40 because the engaging portion 64 is engaged with the outer periphery of the nut member 51. Thereby, the nut member 51 can also be rotated integrally.
That is, the engagement holding mechanism 80 corresponds to the engagement holding member according to the present invention. The engagement holding mechanism 80 is provided with respect to the front housing 31. FIG. 9 is an enlarged perspective view showing the engagement holding mechanism 80 shown in FIG. FIG. 10 is an enlarged cross-sectional view of the engagement holding mechanism 80 shown in FIG. FIG. 11 is an enlarged cross-sectional view of the engagement holding mechanism 80 shown in FIG. The engagement holding mechanism 80 is provided with respect to the outer peripheral ring 621 of the engagement member 61. The engagement / holding mechanism 80 is roughly engaged with a shaft support portion 81 provided for the outer peripheral ring 621, a holding engagement body 83 rotatably supported by the shaft support portion 81, and the holding engagement body 83. And an urging spring 87 that urges rotation in the holding direction. As shown in FIG. 9, the shaft support portion 81 is formed so as to protrude outward with respect to the outer peripheral surface of the outer peripheral ring 621. The shaft support portion 81 is provided with a shaft support pin 82. The shaft support pin 82 rotatably supports the holding engagement body 83.

As shown in FIGS. 10 and 11, the holding engagement body 83 is formed by the operation wall portion 84 and the abutting wall portion 85 so as to be bent in a cross-section when viewed in cross section. Similarly to the outer peripheral surface of the outer peripheral ring 621, the operation wall portion 84 is formed facing the outside so that the user can perform a pushing operation. A biasing spring 87 is in contact with the front side of the operation wall portion 84. The urging spring 87 is a coil spring and urges the operation wall portion 84 toward the outside. The biasing spring 87 is held by a holding recess 88 provided in the outer peripheral ring 621. A contact wall portion 85 that enters the inner peripheral side of the outer peripheral ring 621 is provided at the rear portion of the operation wall portion 84. The contact wall portion 85 extends in a direction intersecting the operation wall portion 84 so as to enter the inner peripheral side of the outer peripheral ring 621. As shown in FIGS. 10 and 11, the contact wall portion 85 is formed so as to protrude into the inner peripheral side so as to enter the inner peripheral side of the outer peripheral ring 621 and contact the contact end 34 of the guide peripheral edge 32. Has been. The outer peripheral ring 621 is provided with a communication hole 89 that allows the contact wall portion 85 to enter the inner peripheral side of the outer peripheral ring 621. The communication hole 89 is formed by providing the outer peripheral ring 621 with an opening shape that allows communication between the inside and the outside. From this communication hole 89, the contact wall portion 85 enters the inner peripheral side of the outer peripheral ring 621 and can contact the contact end 34 of the guide peripheral edge 32 in the front-rear direction. In other words, the holding engagement body 83 rotates about the pivot pin 82 as the rotation axis by receiving the rotation biasing force of the biasing spring 87 so that the contact wall portion 85 contacts the contact end 34 of the guide peripheral edge 32. It has become.
In this way, when the engagement member 61 is located at the retracted position (P1), the contact wall portion 85 of the holding engagement body 83 is brought into contact with the contact edge of the guide peripheral edge 32 as shown in FIG. It is arranged on the outer peripheral side of the guide peripheral edge 32 without being in contact with 34. At this time, as shown in FIG. 10, the operation wall portion 84 of the holding engagement body 83 is disposed so as to extend in a direction parallel to the outer peripheral surface of the outer peripheral ring 621. On the other hand, when the engagement member 61 is located at the engagement position (P2), the contact wall portion 85 of the holding engagement body 83 contacts the guide peripheral edge 32 as shown in FIG. It will be in contact with the end 34. Thus, when the contact wall 85 is in contact with the contact end 34, the engagement member 61 is moved from the engagement position (P2) to the retracted position (P1) by the biasing force of the biasing spring 75. It is possible to regulate returning to That is, the engaging member 61 can be left in the engaging position (P2). At this time, the operation wall portion 84 of the holding engagement body 83 is disposed so as to extend in an intersecting oblique direction with respect to the outer peripheral surface of the outer peripheral ring 621.

  That is, the user discriminates the extending direction of the operation wall portion 84 of the holding engagement body 83 with respect to the outer peripheral surface of the outer peripheral ring 621 so that the engagement member 61 is in the retracted position (P1) or the engagement position (P2). It is possible to determine which of the positions. Specifically, the user moves the engaging member 61 to the retracted position (P1) when the extending direction of the operation wall portion 84 of the holding engagement body 83 is parallel to the outer peripheral surface of the outer peripheral ring 621. It can be determined that it is located in Further, when the extending direction of the operation wall portion 84 of the holding engagement body 83 is an oblique direction crossing the outer peripheral surface of the outer peripheral ring 621, the user moves the engaging member 61 to the engagement position (P2). It can be determined that it is located. As described above, the user determines whether or not the engagement member 61 is engaged with the bit attachment mechanism 41 depending on the extending direction of the holding engagement body 83 including the operation wall portion 84 with respect to the outer peripheral surface of the outer peripheral ring 621. Can be determined. The holding engagement body 83 including the operation wall portion 84 corresponds to the determination unit according to the present invention. More specifically, the retracting position (P1) or the engaging position (P2) of the engagement member 61 is provided in the extending direction of the operation wall portion 84 of the holding engagement body 83 by providing an appropriate mark, for example. The discriminating power related to discrimination can be increased. As described above, when the discriminating power of the discriminating means for discriminating whether or not the engaging member 61 is engaged with the bit attachment mechanism 41 is increased, it becomes easier for the user to discriminate the position of the engaging member 61. Furthermore, if the intelligibility regarding such a determination is improved, the bit attachment mechanism 41 and the engagement member 61 function to notify the engaged state, which is convenient. Specifically, when the output direction of the holding engagement body 83 including the operation wall portion 84 with respect to the outer peripheral surface of the outer peripheral ring 621 described above is output by an output device such as a lamp display device, it is used. The above-described determination becomes easier for a person to understand. That is, the holding engagement body 83 including the operation wall portion 84 described above corresponds to the notification unit according to the present invention.

According to the electric rotary tool 10 of the first embodiment described above, the mounting of the rechargeable battery 15 on the battery mounting portion 13 slides from top to bottom along the vertical direction orthogonal to the front-rear direction. By letting Accordingly, the rechargeable battery 15 can be mounted by sliding from the top to the bottom intersecting with the front-rear direction extending as the electric rotary tool 10. Accordingly, in the case where the front-rear direction in which the electric rotary tool 10 extends is arranged so as to follow the horizontal direction, the rechargeable battery 15 is attached to the battery by sliding the rechargeable battery 15 in a direction crossing the horizontal direction. It can be attached to the part 13. In this way, according to the electric rotary tool 10, the rechargeable battery 15 can be easily attached and the handling as the electric rotary tool 10 can be improved.
Further, according to the electric rotary tool 10 described above, the shoe 17 is movable in the front-rear direction (first direction) so that the relative position with respect to the tool body 11 (motor housing 21) can be displaced. Thereby, the arrangement structure of the shoes 17 can be matched with the direction in which the front housing 31 extends. Thereby, the thickness structure as the electric rotary tool 10 can be reduced, and the handling for the user is improved.
Further, according to the electric rotary tool 10 described above, the shaft lock mechanism 37 and the knob screw 18 are disposed at positions where they are symmetrical to each other with respect to the central axis of the motor housing 21 extending along the front-rear direction. Therefore, useless bulk in the front-rear direction can be suppressed. As a result, the length structure of the electric rotary tool 10 can be reduced, and the handling for the user is improved.
Further, according to the electric rotating tool 10 described above, the shaft lock mechanism 37 and the knob screw 18 are arranged in the left-right direction extending in the direction intersecting both the front-rear direction and the vertical direction. The mechanism 37 and the knob screw 18 can be efficiently arranged in the three-dimensional direction, and wasteful bulk as the electric rotary tool 10 is omitted, and the handling for the user is improved.

[Second Embodiment]
Next, an electric rotary tool 10A according to a second embodiment that is different from the above-described first embodiment will be described with reference to FIGS. FIG. 12 is an external side view of the electric rotary tool 10A according to the second embodiment. FIG. 13 is an enlarged perspective view showing the front portion of the electric rotary tool 10A of FIG. 12 in an enlarged manner. 14 is an internal cross-sectional view showing the inside of the electric rotary tool 10A of FIG. FIG. 15 is an external side view corresponding to FIG. 12 when the fixation is released. FIG. 16 is an enlarged perspective view corresponding to FIG. 13 when the fixation is released. FIG. 17 is an internal cross-sectional view corresponding to FIG. 14 when the fixation is released.
In addition, in the electric rotary tool 10A of this 2nd Embodiment, the structure which fixes the shoe 17 is different compared with the electric rotary tool 10 of the above-mentioned 1st Embodiment. In other words, in the structure in which the shoe 17 is fixed in the first embodiment described above, the attachment portion 172 of the shoe 17 is integrated with the guide member 174 by the knob screw 18 by turning the knob screw 18 in the tightening direction. The relative position of the shoe 17 with respect to the tool body 11 is fixed. On the other hand, in the structure in which the shoe 17 is fixed in the second embodiment, the relative position of the shoe 17 with respect to the tool body 11 is fixed by the one-touch fixing mechanism 90. This one-touch fixing mechanism 90 corresponds to the shoe fixing means according to the present invention. The one-touch fixing mechanism 90 is configured to be fixed to the front housing 31 by one touch (one operation).
For this reason, in the electric rotary tool 10A of the second embodiment, the configuration of the knob screw 18 in the electric rotary tool 10 of the first embodiment described above is replaced with the configuration of the one-touch fixing mechanism 90. It has become a thing. For this reason, in the electric rotary tool 10A of the second embodiment, the same configuration as that of the electric rotary tool 10 in the first embodiment is the same as described in the first embodiment. The reference numerals are attached to the drawings and the description is omitted.

That is, as shown in FIGS. 12 to 17, the one-touch fixing mechanism 90 roughly includes a fixing guide plate 91, a fixing screw 93, an operation lever 95, and an urging spring 97.
The fixed guide plate 91 is screwed to the front housing 31 like the guide member 174 of the first embodiment described above. As shown in the figure, the fixed guide plate 91 also has a shape surrounding the mounting portion 172 of the shoe 17, as with the guide member 174. For this reason, this fixed guide plate 91 also has a function of guiding the slide in the front-rear direction of the mounting portion 172 of the shoe 17. The fixed screw 93 is screwed into the screw hole 92 of the fixed guide plate 91 so that the screw can be rotated. An operation lever 95 is attached to the fixing screw 93. The operation lever 95 is integrated with the fixing screw 93. For this reason, when the operation lever 95 is screwed, the fixing screw 93 is also screwed together. A biasing spring 97 is interposed between the operation lever 95 and the fixed guide plate 91. The biasing force of the biasing spring 97 acts on the operation lever 97 so as to release the pressing action of the fixing screw 93 described above. For this reason, the operating lever 95 acts so as to be screwed in the direction opposite to the tightening direction by the biasing force of the biasing spring 97.

By the way, as shown in FIGS. 12 to 14, when the operation lever 95 is screwed in the tightening direction against the biasing force of the biasing spring 97, the fixing screw 93 is screwed into the screw hole 92. Is done. Then, the pressing end 94 of the fixing screw 93 protrudes from the screw hole 92, and the pressing end 94 acts to press the mounting portion 172 of the shoe 17 against the fixed guide plate 91. As a result, the mounting portion 172 of the shoe 17 is pressed and fixed by the fixing screw 93 so as to be integrated with the fixed guide plate 91. In this way, the shoe 17 is fixed to the tool body 11. That is, the one-touch fixing mechanism 90 fixes the shoe 17 whose relative position with respect to the tool body 11 is determined by one-touch operation (one operation) of the operation lever 95.
On the other hand, as shown in FIGS. 15 to 17, when the operation lever 95 is screwed in the unlocking direction in accordance with the biasing force of the biasing spring 97, the biasing force of the biasing spring 97 is reduced. While receiving, the fixing screw 93 is screwed into the screw hole 92. Then, the pressing end 94 of the fixing screw 93 is retracted from the screw hole 92, and the pressing end 94 separates the mounting portion 172 of the shoe 17 from the fixed guide plate 91. As a result, the fixing of the attachment portion 172 of the shoe 17 to the fixed guide plate 91 is released. That is, the shoe 17 can be moved along the front-rear direction, and the relative position with respect to the front housing 31 can be displaced. The operation for releasing the fixing of the one-touch fixing mechanism 90 can also be performed by a one-touch operation (one operation) of the operation lever 95.
According to this electric rotary tool 10A, the shoe 17 is displaceable relative to the tool body 11 (front housing 31), and the one-touch fixing mechanism 90 is one-touch (one operation) for the tool body 11 (front housing). 31), the position of the shoe 17 can be determined and fixed in one touch (one operation). This makes it possible to easily fix the position of the shoe 17 and improve the handling for the user.

[Third Embodiment]
Next, an electric rotary tool 10B according to a third embodiment, which is a modification of the above-described second embodiment, will be described with reference to FIGS. FIG. 18 is an external side view of the electric rotary tool 10B according to the third embodiment. FIG. 19 is an enlarged perspective view showing a front portion of the electric rotary tool 10B of FIG. 18 in an enlarged manner. FIG. 20 is an internal cross-sectional view showing the inside of the electric rotary tool 10B of FIG. FIG. 21 is an external side view corresponding to FIG. 18 when the fixation is released. FIG. 22 is an enlarged perspective view corresponding to FIG. 19 when the fixation is released. FIG. 23 is an internal cross-sectional view corresponding to FIG.
Note that the electric rotary tool 10B of the third embodiment has a different configuration with respect to the one-touch fixing mechanism 90 as compared to the electric rotary tool 10A of the second embodiment described above. In the electric rotary tool 10B according to the third embodiment, the relative position of the shoe 17 with respect to the tool body 11 is fixed by a one-touch fixing mechanism 90A using a toggle mechanism. This one-touch fixing mechanism 90A also corresponds to the shoe fixing means according to the present invention. The one-touch fixing mechanism 90A is also configured to be fixed to the front housing 31 by one touch (one operation).
For this reason, the electric rotary tool 10B of the third embodiment is different from the configuration of the one-touch fixing mechanism 90 in the electric rotary tool 10A of the second embodiment described above in the configuration of the one-touch fixing mechanism 90A using a toggle mechanism. It is intended to replace Therefore, in the electric rotary tool 10B of the third embodiment, the same configuration as the electric rotary tool 10A in the second embodiment is the same as in the first and second embodiments described above. The same reference numerals as those described above are attached to the drawings and description thereof is omitted.

That is, as shown in FIGS. 18 to 23, the one-touch fixing mechanism 90A is roughly provided with a fixing guide plate 91A, a fastening clamp 93A, a clamp holding member 95A, and a toggle operation lever 97A.
The fixed guide plate 91A is configured in substantially the same manner as the fixed guide plate 91 of the second embodiment described above, and is screwed to the front housing 31. The fixed guide plate 91A also has a shape surrounding the attachment portion 172 of the shoe 17, as shown in the figure. For this reason, this fixed guide plate 91 </ b> A also has a function of guiding the slide in the front-rear direction of the attachment portion 172 of the shoe 17. A rolling plate 92A on which a toggle roller 99A described later rolls is attached to the outside of the fixed guide plate 91A. The fastening clamp 93A is formed in a substantially rod shape as illustrated. The fastening clamp 93 </ b> A has a lower end serving as one end held by the clamp holding member 95 </ b> A, and an upper end serving as the other end is in contact with the upper surface of the mounting portion 172 of the shoe 17. For this reason, a locking flange 94A having an enlarged diameter is provided at the upper end of the fastening clamp 93A. The locking flange 94A is provided at the upper end of a fastening clamp 93A inserted from the bottom to the mounting portion 172 of the shoe 17. For this reason, the locking flange 94A acts so as to push down the attachment portion 172 of the shoe 17 in accordance with the pulling downward toward the lower side of the fastening clamp 93A. The lower end of the fastening clamp 93A is screwed by a nut member 96A, and the nut member 96A is held by a clamp holding member 95A. That is, the lower end of the fastening clamp 93A is held by the clamp holding member 95A. A rotating shaft 98A is provided on the rear side of the clamp holding member 95A. The pivot shaft 98A supports the toggle operation lever 97A so as to be pivotable. Further, a toggle roller 99A is provided in an upper portion of the toggle operation lever 97A that is close to the rotation shaft 98A. The toggle roller 99A can roll on the rolling plate 92A. The toggle roller 99A rolls on the rolling plate 92A by the operation of the toggle operation lever 97A to switch the arrangement position. Note that, based on the distance between the toggle roller 99A and the rotation shaft 98A, the fastening clamp 93A may be pushed down or not pushed down.

That is, as shown in FIGS. 18 to 20, when the toggle operation lever 97A is pulled upward, the toggle roller 99A rolls rearward with respect to the rolling plate 92A and moves relatively rearward. Will be located. Then, the distance between the toggle roller 99A and the rotating shaft 98A becomes relatively long, and the fastening clamp 93A is pulled downward. Then, the locking flange 94A provided at the upper end of the fastening clamp 93A acts to push down the attachment portion 172 of the shoe 17 downward. As a result, the mounting portion 172 of the shoe 17 is pressed and fixed by the locking flange 94A so as to be integrated with the fixed guide plate 91. In this way, the shoe 17 is fixed to the tool body 11. That is, the one-touch fixing mechanism 90 can fix the shoe 17 whose relative position with respect to the tool body 11 is determined by one-touch operation (one operation) of the operation lever 95.
On the other hand, as shown in FIGS. 21 to 23, the toggle roller 99A rolls forward with respect to the rolling plate 92A by lowering the toggle operation lever 97A described above. It will be located on the front side. Then, the distance between the toggle roller 99A and the rotating shaft 98A becomes relatively short, and the lowering toward the lower side of the fastening clamp 93A is released. If it does so, the pushing-down effect | action toward the lower side of the latching flange 94A provided in the upper end of fastening clamp 93A will be cancelled | released. As a result, the fixing of the attachment portion 172 of the shoe 17 to the fixed guide plate 91 is released. That is, the shoe 17 can be moved along the front-rear direction, and the relative position with respect to the front housing 31 can be displaced. The operation for releasing the fixing of the one-touch fixing mechanism 90 can also be performed by a one-touch operation (one operation) of the operation lever 95.
Also with this electric rotary tool 10B, the shoe 17 can be displaced relative to the tool main body 11 (front housing 31), and the one-touch fixing mechanism 90A can be used with one touch (one operation) of the tool main body 11 (front housing 31). ), The position of the shoe 17 can be fixed and fixed with one touch (one operation). This makes it possible to easily fix the position of the shoe 17 and improve the handling for the user.

In addition, in the electric rotary tool which concerns on this invention, it is not limited to the structure of the electric rotary tool of above-described embodiment, It may be comprised by changing suitably.
That is, in the above-described embodiment, an electric rotating tool called a so-called cutout tool (dust-proof boat trimmer) is described as an example. However, the electric rotary tool according to the present invention is not limited to such an example, and any electric rotary tool having a mechanism (attachment mechanism) to which the bit B is attached can be used as appropriate. It can employ | adopt in the electric rotary tool of a structure.
Further, the shoe 17, the knob screw 18 as the shoe fixing portion, the one-touch fixing mechanism 90, 90A as the shoe fixing means, etc. described in the above embodiment are examples for explaining the present invention. For this reason, the shoe according to the present invention, the shoe fixing portion according to the present invention, and the shoe fixing means according to the present invention are not limited to the shape and structure described in the above-described embodiment, and are appropriately modified. And may be configured.

DESCRIPTION OF SYMBOLS 10, 10A, 10B Electric rotary tool 11 Tool main body 13 Battery mounting part 15 Rechargeable battery 17 Shoe 171 Shoe main body 172 Mounting part 173 Long hole 174 Guide member 175 Guide rib 18 Knob screw (Shoe fixing part)
DESCRIPTION OF SYMBOLS 19 Screw member 20 Drive part 21 Motor housing 211 Inlet 22 Controller 23 Switch 231 Slide switch (operation input part)
25 Brush motor (motor)
26 Motor shaft 261 Motor shaft tip 27, 28 Bearing 29 Fan 30 Output section 31 Front housing (support housing)
311 Front Housing Front 32 Guide Perimeter 33 Inner Flange 34 Abutting End 35 Output Spindle (Output Shaft)
351 Rear end fitting hole 352 End fitting hole 353 Male screw part 36 Blowing port 37 Shaft locking mechanism (locking part)
38 Operation body 381 Operation body main body 382 Press cover 39 Biasing spring 40 Rotating axis 41 Bit attachment mechanism (fixing member, attachment mechanism, tool holding portion)
45 Tip insertion member (insertion member)
451 Slit 452 Taper 46 Opening 51 Nut member (fastening member)
512 Reduced-diameter portion 513 Female screw portion 52 Opening portion 60 Operation mechanism (operation member, operation portion)
61 Engaging member 62 Guide part 621 Outer ring 622 Inner ring 623 Folded part 624 Rear end of outer ring 625 Protrusion part 63 Coupling part 64 Engaging part 71 Stopper member 73 Coupling part 74 Outer flange part 75 Energizing spring 80 Engagement Holding mechanism (engagement holding member)
DESCRIPTION OF SYMBOLS 81 Axis support part 82 Axis support pin 83 Holding | maintenance engagement body 84 Operation wall part 85 Contact | abutting wall part 87 Biasing spring 88 Holding | maintenance recessed part 89 Communication hole 90,90A One-touch fixing mechanism (shoe fixing means)
91, 91A Fixed guide plate 92 Screw hole 92A Rolling plate 93 Fixed screw 93A Fastening clamp 94 Press end 94A Locking flange 95 Operation lever 95A Clamp holding member 96A Nut member 97 Biasing spring 97A Toggle operation lever 98A Rotating shaft 99A Toggle roller B bit (tip tool)

Claims (6)

A cylindrical housing extending in a first direction;
A motor housed inside the housing;
A tool holding portion that is configured to rotate in response to the rotational drive of the motor, and that protrudes to the outside from one end side of the housing so as to hold a tip tool;
An electric rotary tool having a shoe that is supported by the housing and sets a protruding length of a tip tool held by the tool holding unit,
The other end of the housing is provided with a battery mounting part for mounting a battery,
The electric rotating tool according to claim 1, wherein the battery is mounted on the battery mounting portion by sliding along a second direction extending in a direction intersecting with the first direction. The electric rotary tool according to claim 1,
The electric rotary tool characterized in that the shoe is displaceable in a relative position with respect to the housing by being moved along the first direction. In the electric rotary tool according to claim 1 or 2,
The housing is
A lock portion for restricting relative rotation of the tool holding portion with respect to the housing;
A shoe fixing portion for fixing a relative position of the shoe with respect to the housing,
The electric rotary tool characterized in that the lock portion and the shoe fixing portion are disposed at positions that are symmetrical to each other with respect to a central axis of the housing extending along the first direction. . The electric rotary tool according to claim 3,
The electric rotary tool characterized in that the arrangement direction of the lock portion and the shoe fixing portion is set in a third direction extending in a direction intersecting both the first direction and the second direction. . A cylindrical housing extending in a first direction;
A motor housed inside the housing;
A tool holding portion that is configured to rotate in response to the rotational drive of the motor, and that protrudes to the outside from one end side of the housing so as to hold a tip tool;
An electric rotary tool having a shoe that is supported by the housing and sets a protruding length of a tip tool held by the tool holding unit,
The shoe is displaceable relative to the housing by moving along the first direction,
The electric rotary tool, wherein the shoe fixing means for fixing the position of the shoe with respect to the housing is configured to be fixed to the housing with one touch. A cylindrical housing extending in a first direction;
A motor housed inside the housing;
A tool holding portion that is configured to rotate in response to the rotational drive of the motor, and that protrudes to the outside from one end side of the housing so as to hold a tip tool;
An electric rotary tool having a shoe that is supported by the housing and sets a protruding length of a tip tool held by the tool holding unit,
The housing includes a lock portion that restricts relative rotation of the tool holding portion with respect to the housing, and a shoe fixing portion that fixes a relative position of the shoe with respect to the housing,
The lock portion and the shoe fixing portion are disposed at positions that are symmetrical to each other with respect to the central axis of the housing extending along the first direction,
The electric rotary tool according to claim 1, wherein the operation input unit related to the rotational drive of the motor is disposed in the housing in a direction intersecting with an arrangement direction of the lock unit and the shoe fixing unit.

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