Side handle for power tool and power tool

Abstract

To enable positioning of a side handle relative to a tool body without using tools and enable attachment of a side handle to multiple models of power tools to improve versatility.SOLUTION: A side handle 10 and a polisher 1 include: operation knobs 21 which may be attached to a gear housing 3 in a state that rotation is restricted; and operation parts 20 each of which can lock rotation of the side handle 10 relative to the operation knob 21 and release the lock.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a side handle for a power tool (hereinafter simply referred to as a "side handle") that can be attached to a power tool such as a polisher or grinder, and to a power tool to which the side handle is attached. [Background technology]

[0002] Power tools such as polishers and grinders are provided with side handles for gripping by an operator. The side handles are attached to the side surfaces of the tool body. For example, Patent Document 1 discloses a power tool in which both ends of a loop-shaped side handle are rotatably attached to the left and right sides of the tool body with screws. The side handle is provided with a lock knob that can be rotated between a position where the end of the side handle is locked to the tool body and a position where the lock is released. When the lock knob is rotated to the release position, the angle of the side handle can be adjusted, and when the lock knob is rotated to the lock position, the angle of the side handle can be fixed. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] International Publication No. 2001 / 19228 Summary of the Invention [Problem to be solved by the invention]

[0004] The conventional side handles described above allow the angle to be adjusted (positioned) without using a tool such as a screwdriver. However, they require a dedicated attachment for the side handle on the tool body, which reduces their versatility.

[0005] Therefore, an object of the present disclosure is to provide a side handle and a power tool that can be positioned relative to the tool body without tools, can be attached to multiple models of power tools, and are highly versatile. [Means for solving the problem]

[0006] In order to achieve the above object, a first configuration of the present disclosure is a side handle for a power tool attached to a side surface of a tool body of the power tool, The arms and The arm is rotatably attached to the side surface. Connecting bolt and, The aforementioned Connecting bolt and is attached in a state where rotation is restricted relative to the arm portion. Connecting bolt a rotation lock position that restricts the rotation of the arm portion relative to the Connecting bolt an operating knob that can be moved to an unlocked position that allows rotation of the arm portion relative to the and a biasing means for biasing the operation knob to the rotation lock position, When the operation knob is moved to the unlock position against the biasing means, Connecting bolt When the operation of moving the operation knob to the unlocked position is released, the operation knob returns to the rotation lock position, restricting the rotation of the arm. In order to achieve the above object, a second configuration of the present disclosure is a power tool characterized in that a side handle for a power tool described in any of the first configurations of the present disclosure is attached to the side of a tool body. [Effects of the Invention]

[0007] According to the present disclosure, the tool body Connecting bolt If there is a mounting part, a side handle can be attached and Operation knob via Connecting boltTherefore, positioning relative to the tool body can be performed without tools, and the tool can be attached to multiple models of power tools, increasing versatility. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a partial perspective view of a polisher according to a first embodiment. [Figure 2] FIG. 2 is a partial side view of the polisher of the first embodiment. [Figure 3] FIG. 2 is a partial front view of the polisher of the first embodiment. [Figure 4] FIG. 3 is a cross-sectional view taken along line AA in FIG. 2. [Figure 5] FIG. 2 is an exploded perspective view of the operation unit as seen from the right side. [Figure 6] FIG. 2 is an exploded perspective view of the operation unit as seen from the left side. [Figure 7] FIG. 10 is a partial perspective view of a polisher according to a second embodiment. [Figure 8] FIG. 10 is a partial side view of a polisher according to a second embodiment. [Figure 9] FIG. 10 is a partial front view of a polisher according to a second embodiment. [Figure 10] FIG. 9 is a cross-sectional view taken along line BB in FIG. 8. [Figure 11] FIG. 2 is an exploded perspective view of the operation unit as seen from the right side. [Figure 12] FIG. 2 is an exploded perspective view of the operation unit as seen from the left side. DETAILED DESCRIPTION OF THE INVENTION

[0009] In one embodiment of the present disclosure, the side handle may be provided with an attachment member that can be attached to the tool body and is capable of relative rotation around the attachment member, and the anti-rotation member may be attached in a state in which relative rotation with respect to the attachment member is restricted. According to this configuration, it is possible to prevent rotation by the anti-rotation member by utilizing the attachment member for attachment to the tool body. In one embodiment of the present disclosure, the anti-rotation member may be provided with an engaging portion that engages in the relative rotation direction. According to this configuration, the rotation can be easily prevented by the rotation preventing member. In one embodiment of the present disclosure, the anti-rotation member may also serve as the operating portion. This configuration allows the number of parts to be reduced, and angle adjustment can be easily performed by operating the anti-rotation member.

[0010] In one embodiment of the present disclosure, the anti-rotation member may be movable between a locked position and an unlocked position for relative rotation, and may be provided with a biasing means for biasing the anti-rotation member to the rotation locked position. When the anti-rotation member is moved to the unlocked position against the biasing means, relative rotation of the side handle with respect to the anti-rotation member is permitted, and when the movement operation is released, the anti-rotation member may return to the rotation locked position, thereby restricting relative rotation. With this configuration, after changing the angle by releasing the rotation lock at the lock release position of the rotation stop member, the rotation stop member automatically returns to the rotation lock position and rotation is locked, thereby improving the operability of angle adjustment.

[0011] In one embodiment of the present disclosure, the side handle may have a pair of arms attached to the left and right side surfaces of the tool body, and a pair of anti-rotation members and operating portions may also be provided on the left and right sides. With this configuration, angle adjustment cannot be performed unless the two operating parts are operated simultaneously, eliminating the risk of the side handle in a rotation-locked state rotating unexpectedly, and improving the reliability of angle adjustment. In one embodiment of the present disclosure, the side handle has an arm attached to the side of the tool body, and a rotation axis that rotatably connects the arm is provided at a position different from the attachment position of the anti-rotation member to the tool body, and the operating unit is capable of locking and unlocking the relative rotation of the arm with respect to the rotation axis. According to this configuration, by changing the thickness and length of the anti-rotation member in the left-right direction in accordance with the dimensions and shape of the power tool, other members can be shared. In one embodiment of the present disclosure, the side handle may be attachable to the tool body in a reversible left-right orientation. This configuration makes it easier to assemble the side handle. [Example]

[0012] Hereinafter, an embodiment of the present disclosure will be described with reference to the drawings. Fig. 1 is a partial perspective view showing an example of a polisher, which is an example of a power tool, to which a side handle is attached, Fig. 2 is a partial side view, and Fig. 3 is a partial front view. The polisher 1 has a motor housing 2 that houses a motor (not shown) and extends in the front-to-rear direction. A gear housing 3 with a spindle 4 protruding downward is attached to the front side of the motor housing 2. A disk-shaped tool (e.g., a pad) is attached perpendicularly to the lower end of the spindle 4. A power cord (not shown) is connected to the rear of the motor housing 2. As shown in Figures 4 and 5, mounting portions 5, 5 for the side handle 10 are formed on the left and right side surfaces of the gear housing 3. Each mounting portion 5 is a circular recess in side view, and a screw hole 6 is formed in the center of each mounting portion 5 in the left-right direction.

[0013] A side handle 10 is detachably attached to the mounting portions 5, 5. The side handle 10 is made of resin and is shaped like an inverted U when viewed from the front. The side handle 10 includes a grip portion 11 extending in the left-right direction and a pair of arms 12, 12 extending downward from the left and right ends of the grip portion 11. Cylindrical portions 13, 13 are formed at the lower ends of the arms 12, 12 so as to be coaxial with each other. Intermediate holes 15 with slightly larger diameters are formed coaxially on the left and right outer sides of the center hole 14 of each cylindrical portion 13. Bottomed holes 16 with the largest diameters are formed coaxially on the left and right outer sides of the intermediate holes 15. A plurality of spline teeth 17, 17... extending in the axial direction are formed on the inner peripheral surface of the bottomed holes 16 at equal intervals in the circumferential direction. The cylindrical portions 13 are provided with operation portions 20 that enable attachment and detachment to and angle adjustment of the mounting portions 5. The operation portions 20 are symmetrical, so the following description will focus on the operation portion 20 on the right side.

[0014] As shown in FIGS. 4, 5, and 6, the operation unit 20 has an operation knob 21, a connecting bolt 22, and a coil spring . The operating knob 21 is a cylindrical body having a circular shape in a side view, with a small-diameter portion 24 on the left side and a large-diameter portion 25 on the right side. The small-diameter portion 24 has an outer diameter that allows it to be fitted into the bottomed hole 16 of the cylindrical portion 13 from the right side, and is formed axially longer than the bottomed hole 16. A plurality of axially extending spline teeth 26, 26... are formed on the outer peripheral surface of the small-diameter portion 24 at equal intervals in the circumferential direction. A ring-shaped wall portion 27 is formed on the inner peripheral side of the small-diameter portion 24. A through-hole 28 having a pair of chamfered portions 29, 29 is formed in the center of the wall portion 27. The left end of the small-diameter portion 24 is insertable into and removable from the bottomed hole 16. When inserted, the spline teeth 17, 26 mesh with each other, forming a rotational unit with the cylindrical portion 13.

[0015] The connecting bolt 22 has a threaded portion 30 at its left end. The connecting bolt 22 passes through the operation knob 21 and the tubular portion 13 from the right side, and the threaded portion 30 is screwed into the threaded hole 6 of the mounting portion 5. A detent portion 31, which has a larger diameter than the threaded portion 30, is formed coaxially on the right side of the threaded portion 30. A pair of chamfered portions 32, 32 is formed on the outer circumferential surface of the detent portion 31. The detent portion 31 passes through the through-hole 28 of the operation knob 21, and is integrated with the operation knob 21 in the rotation direction by the engagement of the chamfered portions 29, 32. A ring-shaped groove 33 is formed near the left end of the detent portion 31. A C-shaped stopper 34 is fitted to the groove 33. The stopper 34 can be engaged with the intermediate hole 15 of the tubular portion 13 from the right side. A head portion 35 having a larger diameter than the anti-rotation portion 31 is formed on the right side of the anti-rotation portion 31. A hexagonal hole 36 is formed in the center of the right end face of the head portion 35. The coil spring 23 is fitted around the anti-rotation portion 31 inside the operation knob 21 , with its left end abutting against the wall portion 27 of the operation knob 21 and its right end abutting against the head 35 of the connecting bolt 22 .

[0016] In the side handle 10 and polisher 1 configured as described above, the connecting bolts 22 fitted with the coil springs 23 and stoppers 34 are inserted through the operation knobs 21 and the tubular portion 13 in that order in the left and right operating portions 20, 20 as described above. Then, the threaded portion 30 protruding from the tubular portion 13 is screwed into the threaded hole 6 of the mounting portion 5. Then, the stopper 34 fitted on the anti-rotation portion 31 engages with the intermediate hole 15 of the tubular portion 13, and the left side surface of the tubular portion 13 abuts against the mounting portion 5. At this time, each operating knob 21 is biased by the coil spring 23 to an inner slide position where the small diameter portion 24 is inserted into the bottomed hole 16 and the spline teeth 17, 26 mesh with each other. Therefore, each cylindrical portion 13 is restricted from rotation via the operating knob 21, which is fitted into the anti-rotation portion 31 and prevented from rotating. In this way, the rotation of the side handle 10 is locked.

[0017] On the other hand, to adjust the angle of the side handle 10, the operation knobs 21, 21 of the left and right operation units 20, 20 are pinched by the large diameter portions 25, 25 and pulled against the bias of the coil springs 23, 23, to the outer slide position where the small diameter portions 24, 24 are disengaged from the bottomed holes 16, 16, as shown by the two-dot chain line in Fig. 4. This releases the restriction on rotation of the tubular portions 13, 13 by the operation knobs 21, 21, allowing the side handle 10 to be rotated back and forth as shown by the two-dot chain line in Fig. 2. When the angle is set and the pulling of the operation knobs 21, 21 is released, the operation knobs 21, 21 return to the inner slide position where they are inserted into the bottomed holes 16, 16, due to the bias of the coil springs 23, 23, and the rotation of the side handle 10 is again locked. However, even if the rotation restriction of the tubular portion 13 is released by pulling either the left or right operating knob 21, the rotation of the other tubular portion 13 remains restricted, so the rotation lock of the side handle 10 is maintained. The side handle 10 can be removed from the gear housing 3 by unscrewing the threaded portions 30, 30 of the left and right connecting bolts 22, 22 from the screw holes 6, 6. Therefore, the side handle 10 can be attached and detached to the gear housing 3 in the same way even if the left and right orientations are reversed. The side handle 10 can also be attached and detached to other models (including those other than polishers) as long as the tool body has a pair of left and right screw holes.

[0018] As described above, the side handle 10 and polisher 1 of Example 1 include an operating knob 21 (anti-rotation member) that can be attached to the gear housing 3 (tool body) in a state where rotation is restricted, and an operating unit 20 that can lock and unlock the angle (position) relative to the operating knob 21. According to this configuration, if the gear housing 3 has the mounting portion 5 for the connecting bolt 22, the side handle 10 can be attached, and the angle can be adjusted (positioned) relative to the operation knob 21 via the operation portion 20. Therefore, the angle can be adjusted relative to the gear housing 3 without using tools. In addition, the device can be attached to multiple models of power tools, increasing its versatility. In particular, the side handle 10 is equipped with a connecting bolt 22 (mounting member) that can be attached to the gear housing 3 and is capable of relative rotation around the connecting bolt 22, and the operating knob 21 is attached in a state in which its relative rotation with respect to the connecting bolt 22 is restricted. Therefore, the connecting bolt 22 for mounting to the gear housing 3 can be used to prevent rotation by the operating knob 21.

[0019] The operation knob 21 is provided with spline teeth 26 (engagement portion) that engage in the relative rotation direction. Therefore, the operation knob 21 can be easily used to prevent rotation. The operation knob 21 serves as both a rotation-stop member and the operation unit 20. Therefore, the number of parts can be reduced, and the angle can be easily adjusted by operating the operation knob 21. The operation knob 21 is movable between an inner slide position (relative rotation locked position) and an outer slide position (lock unlocked position), and is provided with a coil spring 23 (biasing means) that biases the operation knob 21 to the inner slide position. When the operation knob 21 is moved to the outer slide position against the coil spring 23, the side handle 10 becomes capable of rotating relative to the operation knob 21, and when the movement operation is released, the operation knob 21 returns to the inner slide position, restricting relative rotation. Therefore, after releasing the rotation lock at the outer slide position of the operation knob 21 and changing the angle, if you release your hand from the operation knob 21, the operation knob 21 will automatically return to the inner slide position and the rotation will be locked. This makes it easy to adjust the angle.

[0020] The side handle 10 has a pair of arms 12, 12 attached to the left and right side surfaces of the gear housing 3, and also has a pair of operation knobs 21 provided on the left and right. Therefore, since the angle cannot be adjusted unless the two operation knobs 21 are operated simultaneously, there is no risk of the side handle 10 in the rotation-locked state rotating unexpectedly, and the reliability of the angle adjustment is improved. The side handle 10 can be attached to the gear housing 3 even if the left and right directions are reversed. This makes it easier to assemble the side handle 10.

[0021] In the first embodiment, the rotational engagement between the operation knob and the bottomed hole of the side handle is not limited to the meshing of spline teeth. It may be an engagement structure between one or more protrusions and recesses, or it may be that a radial engagement protrusion is provided on one of the opposing surfaces of the operation knob and the bottomed hole, and an engagement recess is provided on the other, and the rotation is locked by the engagement between the engagement protrusion and the engagement recess. In the above example, the operating knob side is convex (small diameter portion) and the side handle side is concave (bottomed hole), but the reverse is also possible. That is, the side handle side may have a convex portion with an engaging portion such as spline teeth, and the operating knob side may have a concave portion with an engaging portion such as spline teeth, and these engage in the rotational direction. In the above example, the left and right arms are each provided with an operating knob and an operating unit, but the operating knob and operating unit may be provided on only one of the arms. Therefore, the side handle does not need to be symmetrical. For example, the arm on only one side may be L-shaped as viewed from the front, and attached to the mounting part. In the above example, the operating knob serves as both the anti-rotation member and the operating part, but the anti-rotation member and the operating member of the operating part may be provided separately, and the anti-rotation member may be engaged with and disengaged from the arm by operating the operating member. The attachment members are not limited to connecting bolts, and other members such as pins may also be used. [Example]

[0022] Next, another embodiment of the present disclosure will be described, with the same components as those in the first embodiment being given the same reference numerals and redundant description being omitted. FIG. 7 is a partial perspective view of the polisher 1A, FIG. 8 is a partial side view, and FIG. 9 is a partial front view. The side handle 10A is provided with a pair of anti-rotation arms 40, 40 on the inside of the left and right arms 12, 12. As shown in Figures 10 and 11, the anti-rotation arms 40, 40 are fixed in a position extending downward from the connecting bolts 41, 41 by threading connecting bolts 41, 41 that pass through the upper ends from the left and right outer sides into screw holes 6, 6 of the mounting parts 5, 5. Through holes 42, 42 for screwing in the connecting bolts 41, 41 are formed in the arms 12, 12. The lower ends of the anti-rotation arms 40 are formed with bottomed holes 43, 43 that open outward in a circular shape to the left and right. Screw bosses 44, 44 are coaxially formed on the bottom surfaces of the bottomed holes 43, 43 and protrude outward to the left and right. The outer end of each screw boss 44 forms a coaxial small-diameter portion 45. The undersides of the anti-rotation arms 40, 40 are formed with linear notches 46, 46 that open the bottomed holes 43, 43 to the underside. The lower ends of the arms 12 are connected to the bottomed holes 43 via operation units 50 so that the angle can be adjusted. The operation units 50 are symmetrical, so the operation unit 50 on the right side will be mainly described.

[0023] As shown in FIGS. 10, 11, and 12, the operating portion 50 includes an operating plate 51, a coil spring 52, and a shaft bolt 53. The operation plate 51 is ring-shaped and penetrates the screw boss 44 perpendicularly within the bottomed hole 43. Four engagement pins 54, 54... protrude rightward from the right side of the operation plate 51. The engagement pins 54 are arranged at equal intervals in the circumferential direction on a circle concentric with the center of the operation plate 51. An operation piece 55, which is in an inverted L-shape when viewed from the front, is formed at the lower end of the operation plate 51, extending downward and then bending to the right. The operation piece 55 penetrates the notch 46 and protrudes below the anti-rotation arm 40. Therefore, the operation plate 51 is movable left and right along the screw boss 44 while its rotation is restricted within the bottomed hole 43 by the operation piece 55. The coil spring 52 is fitted to the screw boss 44 on the left side of the operation plate 51. The right end of the coil spring 52 abuts against the operation plate 51, and the left end abuts against the bottom surface of the bottomed hole 43. Therefore, the operation plate 51 is biased to the right by the coil spring 52.

[0024] A through-hole 56 coaxial with the screw boss 44 is formed in the left-right direction at the lower end of the arm portion 12. A tubular portion 57 is formed on the left side surface at the lower end of the arm portion 12, protruding to the left with the through-hole 56 as its center. The tubular portion 57 has a diameter slightly larger than the screw boss 44, and the small-diameter portion 45 of the screw boss 44 can be inserted into the through-hole 56. A ring-shaped ridge 58 with an inner diameter smaller than the outer diameter of the small-diameter portion 45 is formed inside the through-hole 56 on the right side of the tubular portion 57. Eight engagement holes 59, 59... are formed penetrating in the left-right direction around the periphery of the cylindrical portion 57 at the lower end of the arm portion 12. The engagement holes 59 are arranged at equal intervals on a concentric circle centered on the cylindrical portion 57. The engagement pins 54 of the operation plate 51 can be inserted into the engagement holes 59 from the left side. The shaft bolt 53 is inserted into the through-hole 56 from the right side of the arm portion 12, and the small diameter portion 45 is screwed into the screw boss 44 inserted into the cylindrical portion 57. In this state, the head 60 of the shaft bolt 53 abuts against the protrusion 58 inside the through-hole 56. Therefore, the lower ends of the arm portion 12 and the anti-rotation arm 40 are connected to each other so as to be able to rotate relatively around the shaft bolt 53.

[0025] In the side handle 10A configured as described above, the operation plate 51 of each operation unit 50 is biased by the coil spring 52 to an outward sliding position where it abuts against the left side surface of the cylindrical portion 57. In this state, each engagement pin 54 is inserted into the engagement hole 59 of the arm portion 12, so that each arm portion 12 is restricted from rotation via the operation plate 51, which is engaged with the anti-rotation arm 40 and prevented from rotating. In this way, the rotation of the side handle 10A is locked. On the other hand, to adjust the angle of the side handle 10A, the operation plates 51, 51 of the left and right operation units 50, 50 are slid via the operation pieces 55, 55 to the inner slide position where the engagement pins 54 are disengaged from the engagement holes 59, as shown by the two-dot chain lines in Fig. 10. This releases the restriction on rotation of the arms 12, 12 imposed by the operation plates 51, 51, allowing the side handle 10A to be rotated back and forth around the shaft bolts 53, 53, as shown by the two-dot chain lines in Fig. 8. Once the angle is set and the operation pieces 55, 55 are released, the operation plates 51, 51 are returned by the bias of the coil springs 52, 52 to the outer slide position where the engagement pins 54 are inserted into the engagement holes 59, and the rotation of the side handle 10A is again locked. Furthermore, when returning to the outer slide position, even if each engagement pin 54 is not in phase with the engagement hole 59 and abuts against the left side of the arm 12, by slightly rotating the side handle 10A back and forth, the operation plate 51 will automatically move to the outer slide position at a position where each engagement pin 54 is in phase with the engagement hole 59.

[0026] However, even if the operation plate 51 is moved to the inner slide position via either the left or right operation piece 55 and the rotation restriction on the arm 12 is released, the other arm 12 remains rotationally restricted, so the rotation lock on the side handle 10A is maintained. The side handle 10A can also be removed from the gear housing 3 by removing the left and right connecting bolts 41, 41 from the screw holes 6, 6. Therefore, even if the left and right orientations are reversed, the side handle 10A can be similarly attached and detached to the gear housing 3. The side handle 10A can also be attached and detached to other models (including those other than polishers) as long as the tool body has a pair of left and right screw holes.

[0027] Thus, the side handle 10A and polisher 1A of the above-mentioned second embodiment comprise a rotation-restricting arm 40 (rotation-restricting member) that can be attached to the gear housing 3 in a state where rotation is restricted, and an operating part 50 that can lock and unlock relative rotation with respect to the rotation-restricting arm 40. According to this configuration, if the gear housing 3 has the mounting portion 5 for the anti-rotation arm 40, the side handle 10A can be attached, and the angle can be adjusted (positioned) relative to the anti-rotation arm 40 via the operating portion 50. Therefore, the angle can be adjusted relative to the gear housing 3 without using tools. In addition, the handle can be attached to multiple models of power tools, increasing its versatility.

[0028] In particular, the side handle 10A has an arm 12 attached to the side of the gear housing 3, and an axis bolt 53 (rotation axis) that rotatably connects the arm 12 is provided at a position different from the attachment position of the anti-rotation arm 40 to the gear housing 3, and the operating unit 50 is capable of locking and unlocking the relative rotation of the arm 12 with respect to the axis bolt 53. Therefore, if the thickness and length of the anti-rotation arm 40 in the left-right direction are changed according to the dimensions and shape of the polisher 1A, other members can be shared.

[0029] In the second embodiment, the position of the operation piece of the operation plate is not limited to the lower side. The operation piece may be provided on the front or rear side of the operation plate. The number and arrangement of the engagement pins can also be changed as appropriate. The engagement hole in the arm may also be changed to match the engagement pin. In the above example, the operating plate is attached to the anti-rotation arm and engages with and disengages from the arm, but this can also be done the other way around. For example, the operating plate can be attached to the lower end of the arm and biased toward the anti-rotation arm by a coil spring, and the anti-rotation arm can be provided with an engagement hole that engages with the engagement pin on the operating plate, which will also enable similar angle adjustment. The anti-rotation arm is not limited to being attached downward from the side of the gear housing, but can be attached forward, backward, upward, or at an angle, depending on the polisher. In the above example, the side handle is not limited to a symmetrical shape. For example, the side handle may be L-shaped as viewed from the front, and an arm provided on only one side may be attached to the mounting part via a rotation-stop member.

[0030] In addition, in common with each embodiment, the side handle is not limited to an inverted U-shape when viewed from the front. It may be semicircular, bulging left and right and upward, or the like. It may be entirely made of metal or entirely made of resin. The positioning of the side handle is not limited to angle adjustment, but also includes cases where the attachment position of the side handle is slid in a predetermined direction and fixed. The power tool may not be an AC tool, but may be a DC tool that uses a battery pack. The power tool is not limited to a polisher. The present disclosure can be applied to other grinding and polishing tools such as grinders and sanders, and cutting tools such as circular saws and cutters. Therefore, the power tool is not limited to an electric tool. The present disclosure can be applied to air tools, engine tools, and the like. Therefore, the attachment position of the side handle is not limited to the gear housing, but may be the motor housing or another housing. [Explanation of symbols]

[0031] 1,1A··Polisher, 2··Motor housing, 3··Gear housing, 4··Spindle, 5··Mounting portion, 6··Threaded hole, 10,10A··Side handle, 11··Grip portion, 12··Arm portion, 13··Cylinder portion, 16··Bottom hole, 17,26··Spline teeth, 20,50··Operation portion, 21··Operation knob, 22,41··Connecting bolt, 23,52··Coil spring, 31··Rotation prevention portion, 40··Rotation prevention arm, 44··Threaded boss, 51··Operation plate, 53··Axial bolt, 54··Engagement pin, 59··Engagement hole.

Claims

1. A side handle for a power tool that is attached to a side of a tool body of the power tool, The arms and a connecting bolt that rotatably attaches the arm portion to the side surface; an operation knob attached to the connecting bolt in a state in which rotation is restricted, and which is spline-coupled to the arm to move between a rotation lock position where rotation of the arm relative to the connecting bolt is restricted and an unlock position where the spline coupling is released and rotation of the arm relative to the connecting bolt is permitted; and a biasing means for biasing the operation knob to the rotation lock position, When the operating knob is moved to the unlocked position against the biasing means, the arm can rotate relative to the connecting bolt, and when the operation to move the operating knob to the unlocked position is released, the operating knob returns to the rotation locked position, restricting rotation of the arm.

2. The tool has a pair of arms attached to the left and right side surfaces of the tool body, 2. The side handle for a power tool according to claim 1, wherein the connecting bolt, the operating knob and the biasing means are provided in pairs on the left and right.

3. 3. The side handle for a power tool according to claim 1, wherein the side handle can be attached to the tool body even when the left and right orientations are reversed.

4. A power tool comprising a side handle for a power tool according to any one of claims 1 to 3 attached to a side surface of a tool body.

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