JP2010264536A - Polishing device accompanying eccentric rotational motion - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a polishing device in which a movement accompanying revolution and rotation, and a movement accompanying back-and-forth and swing movements are settable only by replacement of a polishing member. <P>SOLUTION: The polishing device includes a casing (48); a motor (16); a rotary support body (22) drivingly connected to the motor and rotated around a first axis (40); and at least two kinds of polishing members (14, 14-2, 14-3, 14-4) rotatable around a second axis (60) parallel to the first axis (40) and detachably attached to the rotary support body (22). The casing includes a first sliding engagement portion (86), and at least one polishing member (14-2, 14-3, 14-4) includes a second sliding engagement portion (an elongated groove 82, and a pair of protrusions 84) slidably engaged with the first sliding engagement portion. At least one other polishing member (14) is not engaged with the first sliding engagement portion (86) during attachment to the rotary support body. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a polishing apparatus with eccentric rotational movement.

  Some polishing apparatuses do not directly drive the polishing member by a motor, but indirectly drive the polishing member by an eccentric rotational movement. Specifically, a rotation support that is directly rotated by a rotation driving force from a motor around the first axis, and the first axis at a position away from the first axis in the rotation support. And a polishing member attached to the rotary support so as to be rotatable about a second axis extending parallel to the first axis, and the polishing member is moved in accordance with the rotation of the rotary support around the first axis. It is designed to be rotated by receiving a rotational force around the second axis. In this polishing apparatus, basically, the polishing member revolves around the first axis and rotates around the second axis. On the other hand, the rotation of the polishing member is restricted to keep the direction of the polishing member around the first axis substantially constant, and the movement of the polishing member is caused to rotate around the first axis. It is possible to limit to the back-and-forth motion and the rocking motion accompanying the motion. Japanese Patent Application Laid-Open No. 2004-133260 discloses an apparatus that can selectively use a case where rotation and revolution occur in a polishing member and a case where generation and back-and-forth movement and rocking movement are caused.

Patent No. 4061053

  In the polishing apparatus disclosed in Patent Document 1, in order to properly use the polishing member (polishing pad) as described above, the connecting shaft is passed through the frame supporting the polishing member, and the tip is inserted into the polishing member. By connecting the frame and the polishing member, rotation of the polishing member around the second axis is prevented.

  In this polishing apparatus, the operation of connecting the frame and the polishing member by the connecting shaft is complicated, which hinders work efficiency. Further, since the structure is such that the polishing member that moves at high speed and the stationary frame are connected, there is also a troublesome maintenance of the connection structure.

  An object of the present invention is to eliminate such troublesomeness in such a conventional polishing apparatus and to easily change the movement of the polishing member.

That is, the present invention
A casing (shown as reference numeral 48 in the description of the above embodiment);
A motor (16) attached to the casing;
A rotating support (22) attached to the casing, drivingly connected to the output shaft (18) of the motor, and rotated about a first axis;
The rotary support can be rotated about a second axis (60) extending parallel to the first axis at a position away from the first axis (40) in the rotary support, and can be detached from the rotary support. At least two types of polishing members (14, 14-2, 14-3, 14-4) having a polishing surface (12) extending in a direction perpendicular to the second axis;
Have
The casing is more radially directed from the first axis (40) than the second axis (60) rotated about the first axis (40) as the rotating support rotates. A first sliding engagement portion (86) provided at a position away from the first axis;
At least one of the polishing members (14-2, 14-3, 14-4) is slidable on the first sliding engagement portion when attached to the rotary support. A second sliding engagement portion (in the same embodiment, composed of an elongated groove 82 and a pair of protrusions 84) that is engaged, and the rotation support (22) is rotated to form the second axis ( 60) when rotated about the first axis (40), along the line connecting the engagement portion with the first sliding engagement portion and the second axis (60). A second sliding engagement portion (82, 84) that allows the abrasive member to pivot about the engaging portion while being displaced;
At least one other polishing member (14) of the polishing members is not engaged with the first sliding engagement portion (86) when attached to the rotary support. A polishing apparatus is provided.

  In this polishing apparatus, whether the polishing member moves with the above-mentioned revolution and rotation, or moves with the back-and-forth motion and the rocking motion simply by attaching the required polishing member to the rotation support member. Can be determined.

  Specifically, the first sliding engagement portion (86) is a polishing member (14, 14-2, 14-3, 14-4) attached to the rotary support from the casing (48). The second sliding engagement portion (82, 84) extends linearly in a radial direction from the second axis and slides on the first sliding engagement portion (86). Can be in dynamic engagement.

  More specifically, the second sliding engagement portion (82, 84) extends substantially radially from the second axis (60) on both sides of the first sliding engagement portion (86). It is possible to have a parallel surface that can be engaged with one sliding engagement portion.

  The first sliding engagement portion has a fixed shaft (88) extending in parallel with the first axis, and a radial bearing (90) rotatably attached around the fixed shaft. It can be received between the parallel surfaces.

  Contrary to the above, the second dynamic engagement portion projects from the polishing member attached to the rotating support toward the casing, and the first sliding engagement portion is the second sliding engagement. Both sides of the part may have a parallel surface extending linearly in the radial direction from the second axis so as to be slidably engaged with the second sliding engagement part.

  The at least one polishing member (14-3) includes an extension support member (100) extending forward as viewed from the second axis (60), and a distal end portion of the extension support member parallel to the second axis. And an elongated abrasive 104 attached to extend away from the casing. By doing in this way, while being able to set an abrasive | polishing material in the position where it is easy to see from the user of the said grinding | polishing apparatus, it becomes easy to grind | polish the surface of the recessed part rather than another part. More specifically, the rigid substrate (72-2) in which the at least one polishing member (14-3) is rotatably attached to the rotary support (22) around the second axis (60). The extended support member (100) is made of a sheet-like member having elasticity, and is fixed to the lower surface of the rigid base material (72-2). And an elongated abrasive (104) can be removably secured to the extended portion.

  In addition, at least one abrasive member (14-3) includes a rigid substrate (72-2) attached to the rotary support (22) so as to be rotatable about the second axis (60), and the rigid base. An extension support member (100) having elasticity that is fixed to the material and extending forward, and a triangular abrasive (104-2) that is detachably attached to the lower surface of the extension support member and has the polishing surface on the lower surface; It can be made to have. When this abrasive is used, the polishing operation is performed around one corner portion of the triangle, and when this corner portion is worn, the polishing operation can be performed using the other corner portion.

  In this case, the extended support member (72-2) has a rib portion (102) extending in the front-rear direction, and the abrasive (104-2) is a rib engagement extending from each vertex of the triangle toward the opposite side. A portion (configured as a groove 126 in the same embodiment), and the abrasive can be attached to the extended support member with one of its rib engaging portions engaged with the rib. By engaging the rib engaging portion with the rib, it can be set so that one corner of the triangle in which the rib engaging portion extends is directed to the front of the polishing apparatus.

The present invention also provides
A casing (48);
A motor (16) attached to the casing;
A rotating support (22) attached to the casing, drivingly connected to the output shaft (18) of the motor, and rotated about a first axis (40);
Enabling rotation about a second axis (60) extending parallel to the first axis (40) at a position away from the first axis (40) in the rotary support (22); An abrasive member (14-2, 14-3, 14-4) having an abrasive surface (12) removably attached to the rotating support and extending in a direction perpendicular to the second axis (60);
A polishing apparatus (10) comprising:
Provided in the casing (48) at a predetermined position farther from the first axis (40) than the second axis (60) in the radial direction from the first axis (40), from the casing; A polishing apparatus having a first sliding engagement portion (86) adapted to protrude toward the polishing member (14-2, 14-3, 14-4) attached to the rotary support (22). 10) the polishing member (14-2, 14-3, 14-4),
When attached to the rotating support (22), when the rotating support (22) is rotated by slidably engaging the first sliding engagement portion (86), The first sliding engagement portion (86) is relatively displaced along a line connecting the engagement portion with the first sliding engagement portion (86) and the second axis (60). An abrasive member (14-2, 14-3, 14-4) having a second sliding engagement portion (82, 84) is provided.

  The second sliding engagement portion (82, 84) has a sliding engagement surface extending in a radial direction from the second axis (60) and slidingly engaged with the first sliding engagement portion (86). Can have.

  In addition, the polishing member extends in the direction away from the casing in parallel with the second axis (60) at the distal end portion of the extension support member (100) extending forward when viewed from the second axis. And an elongated abrasive material (104) attached and having the abrasive surface at the tip.

  In this case, a sheet having a rigid base (72-2) rotatably attached to the rotary support (22) around the second axis (60), the extended support member (100) having elasticity. Made of a member and fixed to the lower surface of the rigid base, and has a portion extending forward from the leading edge of the rigid base, and the elongated abrasive is removably fixed to the extended portion. You can make it.

  In addition, the polishing member includes a rigid base (72-2) attached to the rotary support (22) so as to be rotatable around the second axis (60), and fixed to the rigid base in front. An extended support member (100) having elasticity that extends, and a triangular abrasive (104-2) that is removably attached to the lower surface of the extended support member and has the polishing surface on the lower surface. it can.

  In this case, the extended support member has a rib portion (102) extending in the front-rear direction, and the abrasive has a rib engagement portion (126) extending from each vertex of the triangle toward the opposite side, and polishing. A material may be attached to the extended support member such that one of its rib engaging portions engages the rib.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

It is a longitudinal cross-sectional side view which shows one Embodiment of the grinding | polishing apparatus which concerns on this invention. It is a longitudinal cross-sectional side view which shows other embodiment of the grinding | polishing apparatus which concerns on this invention. FIG. 3 is a plan view of a polishing member as viewed in the direction of arrows III-III of the polishing apparatus in FIG. 2. It is a figure which shows a motion of a grinding | polishing member when a grinding | polishing operation | work is performed in the grinding | polishing apparatus of FIG. It is a figure which shows another embodiment of the grinding | polishing apparatus based on this invention, (a) is a longitudinal cross-sectional side view, (b) is the figure which looked at the grinding | polishing member of the grinding | polishing apparatus from the bottom face, (c) is the grinding | polishing It is the figure which looked at the member from the left. The abrasive | polishing material in the grinding | polishing apparatus of FIG. 5 is shown, (a) is a top view, (b) is a side view. It is a figure which shows further different embodiment of the grinding | polishing apparatus which concerns on this invention, (a) is a vertical side view, (b) is the figure which looked at the front part of the grinding | polishing apparatus from the top. It is a figure which shows the abrasive | polishing material used with another embodiment of the grinding | polishing apparatus based on this invention, (a) is a top view, (b) is a side view. It is a figure which shows the same embodiment of the grinding | polishing apparatus which concerns on this invention, (a) is a vertical side view, (b) is the figure which looked at the front part of the grinding | polishing apparatus from the top.

  In FIG. 1, the vertical side view of the grinding | polishing apparatus 10 which concerns on one Embodiment of this invention is shown.

  The polishing apparatus 10 is equipped with a disk-shaped polishing member 14 having a disk-shaped polishing surface 12 when viewed from the bottom side, and a vane air motor 16 and an umbrella on an output shaft 18 of the vane air motor. A rotary support 22 for driving and connecting the gears 19 and 20 to support the polishing member 14 is provided.

  The vane air motor 16 is well known to those skilled in the art and will not be described in detail. However, the vane air motor 16 is rotatably supported by the radial bearings 24 and 26 and is rotatably provided in the radial direction. A plurality of vanes are provided, and are driven to rotate by compressed air supplied from a compressed air supply source (not shown) through the compressed air supply tube 28.

  Between the compressed air supply tube 28 and the vane type air motor 16, an on-off valve device 34 that is opened and closed by an operation of a lever 32 pivotally attached by a pivot 30 is attached. This valve device is also well known to those skilled in the art and will not be described in detail.

  The rotary support 22 is driven to rotate around an axis (hereinafter referred to as a first axis) 40 of the bevel gear 20 fixed thereto, and the polishing apparatus is supported by upper and lower radial bearings 44 and 46. Is rotatably supported in the casing 48.

  Specifically, the rotary support 22 includes an upper shaft portion 50 supported by the upper radial bearing 44, an intermediate shaft portion 52 to which the bevel gear 20 is fixed, and a lower shaft supported by the lower radial bearing 46. And a polishing member support 56 connected to the lower shaft portion 54 and supporting the polishing member 14.

  The polishing member support portion 56 has a columnar shape as a whole, and has a polishing member support recess 58 extending upward from the bottom thereof. The polishing member support recess 58 has a circular cross section centered on a second axis 60 that is parallel to the first axis 40 with a distance A, and a radial bearing 62 is provided on the cylindrical inner wall surface 64 thereof. The polishing member 14 is rotatably supported by the radial bearing 62.

  Specifically, the cylindrical inner wall surface 64 is used as an outer race of the radial bearing 62, and a cylindrical race member 66 coaxial with the second axis 60 is provided as the inner race of the radial bearing. A screw 68 is cut on the inner peripheral surface of the lace member 66, and the polishing member 14 is connected and fixed to the rotary support member by screwing a bolt 70 extending upward through the center of the top surface of the polishing member 14 to the screw 68. It is like that.

  In this polishing apparatus, when the valve device 34 is opened by the operation of the lever 32 and is rotated by the compressed air supplied to the vane air motor 16, the rotary support 22 is driven to rotate about the first axis 40. As a result, the second axis 60 is rotated (revolved) about the first axis 40, and the polishing member 14 is rotated (rotated) about the second axis 60 accordingly. Therefore, by pressing the polishing surface 12 of the polishing member 14 against the surface of the object to be polished with an appropriate pressure, polishing is performed by the movement of the polishing surface accompanied by revolution and rotation.

  FIG. 2 shows a state in which the disk-shaped polishing member 14 is replaced with another polishing member 14-2 in the polishing apparatus 10 of FIG. When viewed along the line III-III in FIG. 2, the polishing member 14-2 has a rectangular shape as shown in FIG.

  Specifically, the polishing member 14-2 includes a rectangular rigid base material 72 fixed to the cylindrical lace member 66 with bolts 70, and a shock absorber made of a sponge material attached to the bottom surface of the rigid base material. It consists of a member 74 and a sheet-like abrasive 76 removably attached to the bottom surface of the buffer member 74 with a surface fastener.

  As shown in FIG. 3, an insertion hole 78 through which the bolt 70 is passed is formed in the rigid base material 72. When the rigid base material 72 is fixed to the rotation support member 22 by the bolt 70, the bolt 70. , And thus the longitudinal axis 78-1 of the insertion hole 78 is aligned with the second axis 60 described above. Further, an elongated groove 82 formed along one line 80 extending radially from the longitudinal axis 78-1 (and hence the second axis) of the insertion hole 78 is formed on the upper surface of the rigid base 72. A pair of protrusions 84 are provided along both side edges of the elongated groove 82.

  The elongated groove 82 and the pair of protrusions 84 are in sliding contact with a first sliding engagement member 86 attached to the casing 48 of the polishing apparatus 10 adjacent to the radial bearing 62 that supports the polishing members 14 and 14-2. It is supposed to be combined. Specifically, the sliding engagement member 86 is formed by attaching a radial bearing 90 to a lower end portion of a bolt-shaped fixed shaft 88 inserted and fixed upward from the bottom surface of the casing facing the polishing member 14-2. The lower end portion of the fixed shaft extends between the pair of protrusions 84 and is inserted into the elongated groove 82.

  When the vane type air motor is operated in this state and the rotary support 22 is rotated, the bolt 70, and therefore the second axis 60 aligned with the longitudinal axis thereof, is aligned with the rotary axis of the rotary support 22. The first axis 40 is rotated (revolved). FIG. 4 shows the movement of the polishing member 14-2. When the disk-shaped polishing member 14 as shown in FIG. 1 is attached, as described above, the polishing member 14 rotates (rotates) around the second axis along with the above revolution. The polishing member 14-2 includes an elongated groove 82 and a pair of protrusions 84, which are engaged with the radial bearing 90 of the sliding engagement member 86 protruding from the casing 48 of the polishing apparatus. Rotation around the axis 60 (rotation) is prevented. In this case, since the second axis 60 revolves around the first axis 40, when the second axis rotates 180 degrees (d in FIG. 4), the position before the rotation starts (FIG. 4a), the second axis 60 is displaced by 2A, which is twice the eccentric amount A from the first axis 40, and moves back by 2A when rotated 360 degrees. In the example shown in FIGS. 2 and 3, the first axis 40 and the sliding engagement member 86 are aligned in the front-rear direction of the polishing apparatus (the left-right direction in FIGS. 1 and 2). -2 moves back and forth a distance of 2A. Further, since the second axis 60 is displaced in the lateral direction with respect to the front-rear direction as it revolves, the polishing member 14-2 has the sliding engagement member 86 formed of the elongated groove 82 and the pair of protrusions. It is swung around the part engaged with 84.

  When the polishing member 14 shown in FIG. 1 is rotated and revolved, it is suitable for polishing when the surface to be polished is wide, and the polishing member 14-2 as shown in FIG. In such a case, the movement of the polishing surface is small, and therefore it is possible to suitably perform polishing of a flat surface in a narrow portion or a corner portion.

  FIGS. 5 to 7 show examples in which different types of polishing members 14-3 are attached. This polishing member has a rigid base material 72-2 similar to the rigid base material 72 in the polishing member shown in FIG. The rigid base material 72-2 is fixed to the cylindrical race member 66 by bolts 70, and has a long and narrow groove 82 and a pair of protrusions 84 formed along both side edges of the long and narrow groove. A radial bearing 90 of a sliding engagement member 86 extending from the casing of the polishing apparatus is engaged with the elongated groove 82 and the pair of protrusions 84. Therefore, the movement of the rigid base material 72-2 when the rotary support is rotated is the same as that of the rigid base material 72 described above. When viewed from the bottom, the rigid base material 72-2 is tapered toward the front as shown in FIG.

  A plate-like extended support member 100 is fixed to the lower surface of the rigid base material 72-2 by a head of a bolt 70. Specifically, the extended support member 100 is formed of a sheet material having elasticity, and is fitted into a shallow groove 103 formed on the lower surface of the rigid base material 72-2 so as to extend in the front-rear direction. The front end of the rigid base material 72-2 extends forward. A rib portion 102 that is curved downward is provided along the center in the width direction of the extended support member 100. Further, a hole 108 for passing a screw 114 for attaching the abrasive 104 (FIGS. 6 and 7) is formed in a portion near the tip of the rib portion 102. As shown in FIG. 6, the abrasive 104 is detachably attached to the lower surface of the rigid cylindrical member 106, a shock absorbing member 109 made of a sponge or the like attached to the lower surface of the rigid cylindrical member 106, and a surface fastener. A groove 112 extending in the diametrical direction is formed on the upper surface of the rigid cylindrical member 106, and the groove 112 is fitted to the rib portion 102 of the extension support member 100. FIG. As shown in FIG. 4, the screw 114 is fixed by being screwed into a screw hole 120 provided on the upper surface of the rigid cylindrical member 106 of the polishing member through a hole 108 formed in the extended support member 100. As can be seen from FIG. 7 (b), the extended support member 100 also has a tapered tip so that an operator who holds the polishing apparatus in his hand can check the abrasive 104 from above. ing.

  The polishing member 14-3 shown in FIGS. 5 to 7 is suitable for polishing a narrow portion where the surface to be polished is recessed more than other portions.

  8 and 9 show a case where an abrasive 104-2 having a different form from that shown in FIGS. 5 to 7 is attached. That is, the abrasive is a rigid triangular member 121, a cushioning member 122 made of sponge or the like attached to the lower surface of the rigid triangular member 121, and a sheet removably attached to the lower surface of the cushioning member 122 with a surface fastener. Shaped abrasive 124. On the upper surface of the rigid triangular member 121, grooves 126 extending from each vertex of the triangle toward the opposite side are provided so as to intersect each other, and screw holes 128 are formed near the ends of the respective grooves 126. ing. As with the above-described abrasive material 104, the abrasive material 104-2 is fixed by screws 114 so that one groove 126 is fitted to the rib portion 102 of the extended support member 100.

  This triangular abrasive 104-2 is suitable for polishing in a narrow portion such as a flat corner surface. When one corner portion of the sheet-like abrasive 124 is worn by the polishing operation, the screw 114 is removed and replaced so that the other corner portion becomes the front end.

  Although the embodiments of the polishing apparatus according to the present invention have been described above, the present invention is not limited to these embodiments. For example, in the above-described embodiment, the sliding engagement member 86 is attached toward the casing 48. However, it can be attached to the polishing member and provided with an elongated groove or the like on the casing. Moreover, although what comprised the elongate groove | channel and a pair of protrusion was shown as a 2nd sliding engagement member, it can comprise only an elongate groove, or can comprise only a pair of protrusion.

  Polishing device 10; Polishing surface 12; Polishing member 14; Polishing member 14-2; Polishing member 14-3; Output shaft 18; Bevel gears 19 and 20; Rotating support 22; Radial bearings 24 and 26; Pivot 30; lever 32; on-off valve device 34; first axis 40; radial bearings 44 and 46; casing 48; upper shaft portion 50; intermediate shaft portion 52; lower shaft portion 54; polishing member support portion 56; Support recess 58; spacing A; second axis 60 ;; radial bearing 62; cylindrical inner wall surface 64; cylindrical race member 66; screw 68; bolt 70; rigid substrate 72; 74; sheet abrasive 76; insertion hole 78; longitudinal axis 78-1; line 80; elongate groove 82; projection 84; sliding engagement member 86; fixed shaft 88; Rib 102; Groove 103; Abrasive material 104; Abrasive material 104-2; Rigid cylindrical member 106; Hole 108; Buffer member 109; Polishing sheet 110; Groove 112; Screw 114; Screw hole 120; Buffer member 122; sheet-like abrasive 124; groove 126; screw hole 128;

Claims (15)

A casing,
A motor attached to the casing;
A rotating support attached to the casing, drivingly connected to the output shaft of the motor, and rotated about a first axis;
The rotary support is rotatable about a second axis extending parallel to the first axis at a position away from the first axis, and is selectively removably attached to the rotary support. At least two types of polishing members having at least two types of polishing members having a polishing surface extending in a direction perpendicular to the second axis when attached to the rotary support;
Have
The casing is located farther from the first axis in a radial direction from the first axis than the second axis rotated around the first axis as the rotary support rotates. A first sliding engagement portion provided on the
A second sliding engagement portion that slidably engages with the first sliding engagement portion when at least one of the polishing members is attached to the rotary support; When the rotation support is rotated and the second axis is rotated about the first axis, the engagement portion with the first sliding engagement portion and the second axis are A second sliding engagement portion that allows the abrasive member to pivot about the engagement portion while being displaced along a line connecting
A polishing apparatus, wherein at least one other polishing member of the polishing members is not engaged with the first sliding engagement portion when attached to the rotary support. .   The first sliding engagement portion protrudes from the casing toward an abrasive member attached to the rotary support, and the second sliding engagement portion is radial from the second axis. The polishing apparatus according to claim 1, wherein the polishing apparatus is linearly extended to slide-engage with the first sliding engagement portion.   The second sliding engagement portion extends on both sides of the first sliding engagement portion in a substantially radial direction from the second axis, and is parallel to be engageable with the first sliding engagement portion. The polishing apparatus according to claim 2, wherein the polishing apparatus has a smooth surface.   The first sliding engagement portion has a fixed shaft extending in parallel with the first axis, and a radial bearing rotatably mounted around the fixed shaft, and the radial bearing is disposed on the parallel surface. 4. A polishing apparatus according to claim 3, which is received in between.   The second sliding engagement portion protrudes from the polishing member attached to the rotary support toward the casing, and the first sliding engagement portion is formed on the second sliding engagement portion. 2. The polishing apparatus according to claim 1, wherein both sides have parallel surfaces extending linearly in a radial direction from the second axis so as to be slidably engaged with the second sliding engagement portion. .   The at least one polishing member is attached to an extension support member extending forward as viewed from the second axis, and attached to a distal end portion of the extension support member so as to extend in a direction away from the casing in parallel to the second axis. The polishing apparatus according to claim 1, further comprising an elongated abrasive.   The at least one abrasive member has a rigid substrate rotatably attached to the rotary support about the second axis, and the extended support member is made of an elastic sheet-like member; The thin abrasive is fixed to the lower surface of the rigid base and extends forward from the leading edge of the rigid base, and the elongated abrasive is detachably fixed to the extended part. 6. The polishing apparatus according to 6.   A rigid base member rotatably attached to the rotary supporter about the second axis; and an extended support member having elasticity that is fixed to the rigid base member and extends forward. The polishing apparatus according to claim 1, further comprising a triangular abrasive that is removably attached to the lower surface of the extended support member and has the polishing surface on the lower surface.   The extended support member has a rib extending in the front-rear direction, the abrasive has a rib engaging portion extending from each vertex of the triangle toward the opposite side, and the abrasive is attached to one of the rib engaging portions. 9. The polishing apparatus according to claim 8, wherein one is attached to the extended support member so as to engage with the rib. A casing,
A motor attached to the casing;
A rotating support attached to the casing, drivingly connected to the output shaft of the motor, and rotated about a first axis;
The rotary support is rotatable about a second axis extending parallel to the first axis at a position away from the first axis, and is selectively removably attached to the rotary support. A polishing member having a polishing surface extending in a direction perpendicular to the second axis;
A polishing apparatus comprising:
A radial direction from the first axis is provided in the casing at a predetermined position farther from the first axis than the second axis, and from the casing toward the polishing member attached to the rotary support. A polishing member in a polishing apparatus having a first sliding engagement portion which is adapted to protrude,
When attached to the rotary support, it is slidably engaged with the first sliding engagement portion, and when the rotary support is rotated, A polishing member having a second sliding engagement portion that is relatively displaced along a line connecting the engagement portion with the first sliding engagement portion and the second axis.   The abrasive member according to claim 10, wherein the second sliding engagement portion has a sliding engagement surface extending in a radial direction from the second axis, and is in sliding engagement with the first sliding engagement portion. .   An extension support member extending forward as viewed from the second axis, and attached to a tip portion of the extension support member so as to extend in a direction away from the casing in parallel to the second axis, and having the polishing surface at the tip The abrasive member according to claim 10 or 11, comprising an elongated abrasive.   The rotating support has a rigid base mounted rotatably around the second axis, and the extended supporting member is made of a sheet-like member having elasticity, and is fixed to the lower surface of the rigid base The abrasive member according to claim 12, further comprising a portion extending forward from a leading edge of the rigid base material, wherein the elongated abrasive material is detachably fixed to the extended portion.   A rigid base member rotatably attached to the rotary support member about the second axis; an extension support member fixed to the rigid base member and having elasticity extending forward; and a lower surface of the extension support member. The abrasive member according to claim 1 or 11, further comprising a triangular abrasive having a polishing surface attached to a lower surface of the abrasive member.   The extended support member has a rib extending in the front-rear direction, the abrasive has a rib engaging portion extending from each vertex of the triangle toward the opposite side, and the abrasive is attached to one of the rib engaging portions. 15. The polishing member according to claim 14, wherein one is attached to the extended support member so as to engage with the rib.

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