Grinding brush and brush holder

Abstract

The grinding brush (1) comprises a brush holder (2) and a brush (3). The brush holder (2) has a shank (5), the base end portion of which is connected to a tool table of a lathe, and a brush holding member (6) supported at the tip end portion of the shank (5). The brush (3) is removably held in a brush holding hole (7) provided in an annular outer peripheral surface (33) of the brush holding member (6) around a Y-axis orthogonal to the axis of the handle (5), and protrudes radially outward from the brush holding member (6). The brush holder (2) includes a positioning mechanism (60) that positions the brush holding member (6) at a plurality of rotational angle positions, and a fixing mechanism (61) that fixes the positioned brush holding member (6) to the handle (5).

Description

Technical Field

[0001] The present invention relates to a grinding brush for grinding a rotating workpiece and also relates to a brush holding seat for holding the brush in the grinding brush. Background Art

[0002] Patent document 1 describes an abrasive brush for grinding a rotating workpiece. The abrasive brush of the same document has a rod-shaped member and a brush held by the rod-shaped member. The rod-shaped member includes a brush holding hole for holding the brush at the front end portion. The brush holding hole is recessed rearward in a direction intersecting the axis of the rod-shaped member. The brush includes an abrasive bundle consisting of a plurality of linear abrasives and an abrasive holding seat for holding one end of the abrasive bundle. The brush is held on the rod-shaped member in a posture where the abrasive bundle holding seat is inserted into the brush holding hole. When the brush is held on the rod-shaped member, the abrasive bundle extends forward toward the outer peripheral side of the rod-shaped member. The inclination angle at which the extension direction of the abrasive bundle intersects the axis of the rod-shaped member is less than 45°.

[0003] The polishing brush of the same document is used, for example, for polishing the inner circumference of a pipe member. When polishing the inner circumference of a pipe member, the polishing brush is connected to the head of a machining center or a machine tool so that the axis of the rod-shaped member is parallel to the pipe axis of the pipe member. In this posture, the polishing brush is inserted into the inner side of the pipe member and polishes the inner circumference of the pipe member rotating around the pipe axis. Prior art literature Patent Literature

[0004] Patent Document 1: Japanese Patent No. 6810435 Summary of the invention Technical problem to be solved by the invention

[0005] There is a desire to grind multiple types of parts with one grinding brush. However, when grinding multiple types of parts, it is necessary to adjust the contact angle between the brush and the grinding target part for each part. Here, in the past, when adjusting the contact angle between the grinding brush and the grinding target part, the grinding brush was connected to the head via a clamp for angle adjustment.

[0006] When the grinding brush is connected to the head via a clamp and the angle of the brush is adjusted, the reproducibility of the angle of the brush is low. Therefore, once the clamp between the grinding brush and the head is removed, the angle of the brush cannot be accurately reproduced when the same part is subsequently ground, and the grinding accuracy may not be maintained. Technical solutions adopted to solve technical problems

[0007] In view of the above problems, the technical problem of the present invention is to provide a grinding brush, which can change the extension direction of the brush to multiple directions, and even if the extension direction is changed, the extension direction of the brush can be accurately returned to the extension direction before the change. In addition, a brush holder is provided, which can return the extension direction of the brush to the extension direction before the change even if the extension direction is changed.

[0008] In order to solve the above technical problems, the present invention is characterized in that, when three mutually orthogonal axes are set as X-axis, Y-axis and Z-axis, the direction along the X-axis is set as X-axis direction, the direction along the Y-axis is set as Y-axis direction, and the direction along the Z-axis is set as Z-axis direction, the present invention includes a brush holder and a brush, wherein the brush holder has: a handle, the handle has an axis consistent with the X-axis; a brush holder member, the brush holder member is supported on the front end portion of the handle; a brush holder hole, the brush holder hole is provided on the annular outer peripheral surface of the brush holder member around the Y-axis orthogonal to the axis; a positioning mechanism, the positioning mechanism positions the brush holder member at a first rotation angle position around the Y-axis or a second rotation angle position different from the first rotation angle position; and a fixing mechanism, the fixing mechanism fixes the positioned brush holder member to the handle, the brush is detachably held in the brush holder hole, protrudes radially outward from the brush holder member, and extends outward from the handle when viewed from the Y-axis direction.

[0009] According to the present invention, the brush extends radially outward from the brush holding member centered on the Y-axis. The brush holding member is supported by the front end portion of the handle extending in the X-axis direction, and is fixed to the handle in a state of being positioned at a first rotation angle position or a second rotation angle position around the Y-axis. Therefore, in the case where the brush holding member is positioned at the first rotation angle position and fixed to the handle and in the case where the brush holding member is positioned at the second rotation angle position and fixed to the handle, the extension direction of the brush can be changed. Therefore, even in the case where the handle is connected to a working machine without using a clamp for angle adjustment, the extension direction of the brush can be changed. In addition, the brush holding member is positioned at the first rotation angle position and the second rotation angle position, respectively, so that even in the case where the extension direction is changed, the extension direction of the brush can be accurately returned to the extension direction before the change.

[0010] In the present invention, the contour shape of the brush holding member when viewed from the Y-axis direction may be a regular polygon, and the handle includes a positioning surface as the positioning mechanism, and the positioning surface can be in surface contact with a portion of the outer peripheral surface of the annular outer peripheral surface of the brush holding member that extends linearly in the circumferential direction from the radial outside. In this way, the positioning of the brush holding member becomes easy.

[0011] In the present invention, the contour shape of the brush holding member when viewed from the Y-axis direction may be a regular polygon, and the handle includes a first positioning surface and a second positioning surface as the positioning mechanism, and the first positioning surface and the second positioning surface can be in surface contact with two peripheral surface portions extending linearly in the circumferential direction of the annular peripheral surface of the brush holding member from the radial outside. In this way, the positioning of the brush holding member becomes easy. In addition, in this way, after the brush holding member is positioned, the brush holding member can be prevented or suppressed from shaking in the circumferential direction.

[0012] In the present invention, the contour shape of the brush holding member when observed from the Y-axis direction may be a regular polygon, and the brush holding hole may be recessed radially inward, and the brush holding hole may include a first brush holding hole and a second brush holding hole, wherein the first brush holding hole is provided in the outer peripheral surface portion extending linearly in the circumferential direction of the annular outer peripheral surface, and the second brush holding hole may be provided to straddle the ridge between two circumferentially adjacent outer peripheral surface portions in the annular outer peripheral surface, and the brush may be selectively held in the first brush holding hole or the second brush holding hole. In this way, the extension direction of the brush may be changed in the case where the brush is held in the first brush holding hole and in the case where the brush is held in the second brush holding hole. Therefore, by combining the structure in which the brush holding member includes two abrasive holding holes with the structure in which the brush holding member is positioned and fixed at the first rotation angle position or the second rotation angle position, the resolution of the direction in which the brush is extended may be improved.

[0013] In the present invention, the Z axis passes through the intersection of the X axis and the Y axis, and when the brush holding member is positioned at the first rotation angle and fixed on the handle, the brush extends radially outward in a first direction toward a side closer to the X axis than the Z axis, and when the brush holding member is positioned at the second rotation angle and fixed on the handle, the brush extends radially outward in a second direction toward the other side closer to the X axis than the Z axis. In this way, the extension direction of the brush can be changed between the first direction toward one side of the X axis and the second direction toward the other side of the X axis.

[0014] In the present invention, the Z axis passes through the intersection of the X axis and the Y axis, and when the brush holding member is positioned at the first rotation angle and fixed on the handle, the brush extends radially outward in a first direction toward a side closer to the Z axis than the X axis, and when the brush holding member is positioned at the second rotation angle and fixed on the handle, the brush extends radially outward in a second direction toward the other side closer to the Z axis than the X axis. In this way, the extension direction of the brush can be changed between the first direction toward one side of the Z axis and the second direction toward the other side of the Z axis.

[0015] In the present invention, the brush may include an abrasive bundle consisting of a plurality of linear abrasives and an abrasive bundle holder that holds one end portion of the abrasive bundle, and the abrasive bundle holder may be inserted into the brush holding hole.

[0016] In the present invention, there may be a limiting member fixed on the handle to limit the expansion of the brush, the brush having an abrasive bundle composed of a plurality of linear abrasives and an abrasive bundle holding seat holding one end portion of the abrasive bundle, the abrasive bundle holding seat being inserted into the brush holding hole, and the limiting member including a relative portion, the relative portion being opposite to the other end portion of the abrasive bundle and a portion between the brush holding member with a gap therebetween in the circumferential direction around the Y-axis.

[0017] In the present invention, there may be a limiting member fixed on the brush holding member to limit the expansion of the brush; the brush has an abrasive bundle composed of a plurality of linear abrasives and an abrasive bundle holding seat holding one end portion of the abrasive bundle, the abrasive bundle holding seat is inserted into the brush holding hole, and the limiting member is opposite to the other end portion of the abrasive bundle and the portion between the brush holding member with a gap therebetween in the circumferential direction around the Y-axis.

[0018] Next, on the basis of a brush holder for holding a brush, the present invention is characterized in that, when three mutually orthogonal axes are set as X-axis, Y-axis and Z-axis, the direction along the X-axis is set as the X-axis direction, the direction along the Y-axis is set as the Y-axis direction, and the direction along the Z-axis is set as the Z-axis direction, the brush holder has: a handle, the handle has an axis extending along the X-axis direction; a brush holding member, the brush holding member is supported on one end portion of the handle in the X-axis direction; a brush holding hole, the brush holding hole is provided on the annular outer peripheral surface around the Y-axis in the brush holding member; a positioning mechanism, the positioning mechanism positions the brush holding member at a first rotation angle position around the Y-axis or a second rotation angle position different from the first rotation angle position; and a fixing mechanism, the fixing mechanism fixes the positioned brush holding member to the handle, and when the brush is held in the brush holding hole, the brush protrudes radially outward from the brush holding member and extends outward from the handle when viewed from the Y-axis direction. Effects of the Invention

[0019] According to the grinding brush and brush holder of the present invention, the extension direction of the brush can be changed in multiple directions. In addition, according to the grinding brush and brush holder of the present invention, even when the extension direction is changed, the extension direction of the brush can be accurately returned to the extension direction before the change. BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 It is a three-dimensional picture of the abrasive brush. Figure 2 This is an exploded perspective view of the polishing brush as seen from the brush holding member side. Figure 3 This is an exploded perspective view of the grinding brush as viewed from the brush holder side. Figure 4 It is a top view of the abrasive brush. Figure 5 It is a three-dimensional picture of a brush. Figure 6 This is a diagram for explaining the extension direction of the brush. Figure 7 This is a diagram for explaining the extension direction of the brush. Figure 8 This is an explanatory diagram of an example of fixing the restriction member to the handle. Fig. 9 This is the first example of a method for grinding a workpiece. Fig.10 This is the second example of a method for grinding a workpiece. Fig.11 This is the third example of a method for grinding a workpiece. Fig.12 This is the fourth example of the workpiece grinding method. Fig.13 This is an example in which the positioning mechanism includes three positioning surfaces. Fig.14 It is an explanatory diagram of another example of the positioning mechanism. Fig.15 It is an explanatory diagram of another example of the restricting member. DETAILED DESCRIPTION

[0021] Hereinafter, a polishing brush according to an embodiment of the present invention will be described with reference to the drawings.

[0022] (Abrasive Brush) Figure 1 It is a three-dimensional picture of the abrasive brush. Figure 2 This is an exploded perspective view of the polishing brush as seen from the brush holding member side. Figure 3 This is an exploded perspective view of the grinding brush as viewed from the brush holder side. Figure 4 It is a top view of the abrasive brush. Figure 5 It is a three-dimensional picture of a brush.

[0023] The grinding brush 1 of this example is used to grind a rotating workpiece. In this example, the grinding brush 1 is connected to the tool table of a lathe to grind the workpiece that is chucked on the main shaft of the lathe and rotates. Here, the grinding brush 1 is sometimes connected to the main shaft of a multi-axis machining center to grind the rotating workpiece. Figure 1 , Figure 2 as well as Figure 3 As shown, the polishing brush 1 includes a brush holder 2 and a brush 3 held by the brush holder 2. The brush holder 2 includes a handle 5 extending linearly and a brush holding member 6 supported by a support portion 11 provided at the front end of the handle 5.

[0024] like Figure 4 As shown, the brush holding member 6 is a regular polygon when viewed from a direction orthogonal to the axis L0 of the handle 5. The brush 3 is detachably held in a brush holding hole 7 formed on the annular outer peripheral surface of the brush holding member 6. The brush 3 protrudes radially outward from the brush holding member 6. In addition, when viewed from the direction of the central axis L1 of the brush holding member 6 orthogonal to the axis L0 of the handle 5, the brush 3 extends outward from the handle 5. In addition, the brush holding seat 2 includes a limiting member 8, which is used to limit the expansion of the brush 3 during grinding. The limiting member 8 is installed at the front end portion of the handle 5.

[0025] In the following description, three mutually orthogonal axes are set as the X-axis, the Y-axis and the Z-axis, the direction along the X-axis is set as the X-axis direction, the direction along the Y-axis is set as the Y-axis direction, and the direction along the Z-axis is set as the Z-axis direction. In addition, the axis L0 of the handle 5 is set as the X-axis. The central axis L1 of the brush holding member 6 is set as the Y-axis. The axis passing through the intersection of the axis L0 of the handle 5 and the central axis L1 of the brush holding member 6 and being orthogonal to the X-axis and the Y-axis is set as the Z-axis. Next, in the X-axis direction, the front end side of the handle 5 is set as the X1 direction, and the base end side is set as the X2 direction. In addition, in the Y-axis direction, the side of the brush holding member 6 relative to the handle 5 is set as the Y1 direction, and the opposite side is set as the Y2 direction. One side of the Z-axis direction is set as the Z1 direction, and the other side is set as the Z2 direction.

[0026] Here, the Z-axis direction is the direction along the axis L0 of the main shaft of the lathe when the grinding brush 1 is connected to the tool post of the lathe. In other words, the Z-axis direction is the direction along the rotation center axis of the workpiece supported by the main shaft of the lathe. In addition, in the following description, the radial direction refers to the direction centered on the Y-axis.

[0027] (handle) like Figure 2 As shown, the handle 5 is in the shape of a quadrangular prism as a whole. The surface of the support portion 11 facing the Y1 direction is perpendicular to the Y axis. A support portion 11 for supporting the brush holding member 6 is provided at the end portion (front end portion) in the X1 direction of the handle 5. The surface of the support portion 11 facing the Y1 direction is a loading surface 12 for loading the brush holding member 6. In the handle 5, a wall portion 13 is provided at an adjacent position in the X2 direction of the support portion 11. The wall portion 13 stands vertically along the Y-axis direction from the surface of the handle 5 facing the Y1 direction. The wall portion 13 extends in the Z-axis direction and crosses the surface of the handle 5 facing the Y1 direction in the Z-axis direction. The end portion (base end portion) of the handle 5 in the X2 direction is connected to the tool rest of the lathe. Here, in the handle 5, the front end portion that is further in the X1 direction than the wall portion 13 is thinner than the base side portion that is further in the X2 direction than the wall portion 13. That is, the thickness of the support portion 11 in the Y-axis direction is thinner than the thickness of the other parts of the handle 5 in the Y-axis direction.

[0028] like Figure 2 , Figure 3 As shown, the support portion 11 includes a fixing hole 14 penetrating in the Y-axis direction at its center. The fixing hole 14 includes a large diameter portion 15 and a small diameter portion 16 whose inner diameter is smaller than the large diameter portion 15 from the Y2 direction side toward the Y1 direction. Therefore, the support portion 11 includes an annular end surface 17 facing the Y2 direction between the large diameter portion 15 and the small diameter portion 16 in the inner circumferential surface of the fixing hole 14. In the fixing hole 14, a headed fixing screw 18 for fixing the brush holding member is inserted from the Y2 direction side.

[0029] The wall portion 13 has a shape that is plane-symmetrical with respect to an imaginary plane including the X-axis and the Y-axis. The surface of the wall portion 13 facing the X1 direction is perpendicular to the mounting surface 12. Figure 2 , Figure 4 As shown, the surface of the wall portion 13 facing the X1 direction includes a curved surface 20 that is recessed in the Y2 direction at the center in the Z-axis direction. In addition, the surface of the wall portion 13 facing the X1 direction includes a first plane 21 (first positioning surface) and a second plane 22 (second positioning surface) located on both sides of the curved surface 20 in the Z direction. Furthermore, the surface of the wall portion 13 facing the X1 direction includes a third plane 23 located on the opposite side of the curved surface 20 of the first plane 21 and a fourth plane 24 located on the opposite side of the curved surface 20 of the second plane 22. The third plane 23 is inclined in the X2 direction from the first plane 21 toward the Z1 direction. The fourth plane 24 is inclined in the X2 direction from the second plane 22 toward the Z2 direction.

[0030] like Figure 2 As shown, a pair of first screw holes 26a are provided on the front end surface 26 of the support portion 11 (the surface of the shank 5 facing the X1 direction) and arranged in the Z-axis direction at a predetermined interval. Figure 3 As shown in FIG. 1 , a pair of second screw holes 27a are provided on the side surface 27 of the support portion 11 facing the Z1 direction and arranged in the X-axis direction at a predetermined interval. Figure 2 As shown, a pair of third threaded holes 28a are provided on the side surface 28 facing the Z2 direction of the support portion 11. The first threaded hole 26a, the second threaded hole 27a and the third threaded hole 28a are provided to fix the limiting member 8 to the handle 5.

[0031] (Brush holding member) The thickness of the brush holding member 6 in the Y-axis direction is constant. In this example, the contour shape of the brush holding member 6 is a regular octagon. Figure 2 , Figure 3 As shown, the brush holding member 6 includes: a first end face 31 and a second end face 32 of a regular octagon extending perpendicularly to the Y axis and parallel to each other; and an annular outer peripheral surface 33 extending in the Y axis direction and connecting the first end face 31 and the second end face 32. When viewed from the Y axis direction, the annular outer peripheral surface 33 includes eight outer peripheral surface portions 33a extending linearly in the circumferential direction around the Y axis and eight ridges 33b located between two outer peripheral surface portions 33a adjacent in the circumferential direction.

[0032] like Figure 2 , Figure 3 , Figure 4As shown, the brush holding member 6 includes a first brush holding hole 7 (1) and a second brush holding hole 7 (2) as the brush holding hole 7, the first brush holding hole 7 (1) being provided on one of the eight peripheral surface portions 33a, and the second brush holding hole 7 (2) being provided to cross one of the eight ridges 33b. The first brush holding hole 7 (1) and the second brush holding hole 7 (2) are extended linearly toward the radial inner side respectively. The first brush holding hole 7 (1) and the second brush holding hole 7 (2) are separated by an angle interval of 157.5° around the Y axis.

[0033] like Figure 2 , Figure 4 As shown, on the first end face 31 of the brush holding member 6 facing the Y1 direction, a first through hole 35 is provided at a position overlapping with the first brush holding hole 7 (1) in the Y-axis direction. In addition, on the first end face 31, a second through hole 36 is provided at a position overlapping with the second brush holding hole 7 (2) in the Y-axis direction. The first through hole 35 is connected to the first brush holding hole 7 (1), and the second through hole 36 is connected to the second brush holding hole 7 (2). The first through hole 35 and the second through hole 36 are separated by an angular interval of 157.5° around the Y-axis. The brush 3 is selectively retained in one of the first brush holding hole 7 (1) and the second brush holding hole 7 (2). In addition, the brush 3 is fixed to the brush holding member 6 by a brush fixing screw 38 inserted into the first through hole 35 or the second through hole 36.

[0034] In addition, if Figure 3 As shown, the brush holding member 6 includes a threaded hole 39 at the center of the second end surface 32 facing the Y2 direction. The threaded hole 39 extends from the second end surface 32 to the center of the brush holding member 6 in the Y-axis direction.

[0035] (brush) like Figure 5 As shown, the brush 3 has an abrasive bundle 41 composed of a plurality of linear abrasives 41a and an abrasive bundle holding seat 42 for holding one end portion of the abrasive bundle 41. The linear abrasive 41a is obtained by impregnating a collection of inorganic long fibers with resin and solidifying the collection of fibers. That is, the linear abrasive 41a includes a collection of inorganic long fibers and a resin impregnated with the collection of fibers. As the inorganic long fibers, aluminum oxide fibers, silicon carbide fibers, boron fibers, or glass fibers can be used. In the embodiment, the inorganic long fibers are aluminum oxide fibers. In addition, as the linear abrasive 41a, materials composed of nylon, nylon with abrasive grains added, rubber with abrasive grains added, stainless steel, and brass are sometimes used. In the embodiment, the end portion of the abrasive bundle 41 on the side opposite to the side held by the abrasive bundle holding seat 42 is adjusted to a conical shape.

[0036] The abrasive bundle holding seat 42 includes a barrel 43 surrounding the end of the abrasive bundle 41 from the outer circumference and a bottom 44 closing an opening of the barrel 43. The barrel 43 is cylindrical. The bottom 44 is disc-shaped. The inner circumference of the barrel 43 and the end surface of the barrel 43 side of the bottom 44 constitute an abrasive holding hole 40 for holding the abrasive bundle 41. One end of the abrasive bundle 41 inserted into the barrel 43 abuts against the bottom 44. The abrasive bundle 41 is fixed to the abrasive bundle holding seat 42 by an adhesive injected into the abrasive holding hole 40. A threaded hole 45 for fixing a brush is provided in the bottom 44 and penetrates the bottom 44 in the radial direction.

[0037] (Restriction member) like Figure 2 , Figure 3 As shown, the limiting member 8 includes a plate portion 48 and a connecting portion 49. The plate portion 48 is generally in the shape of a rectangle that is longer in the Y-axis direction, and the connecting portion 49 is in the shape of a cuboid that protrudes from one side portion in the long side direction of the plate portion 48. The end surface of the connecting portion 49 on the side opposite to the plate portion 48 is a contact surface 49a that contacts the handle 5 when the limiting member 8 is fixed to the handle 5. A long hole 50 extending in the short side direction of the plate portion 48 is provided on one side portion in the long side direction of the plate portion 48, i.e., the portion to which the connecting portion 49 is connected. Figure 3 As shown, the long hole 50 passes through the connecting portion 49 and opens at the abutting surface 49a of the connecting portion 49. Figure 2 As shown, the long hole 50 includes an annular step portion midway in the depth direction from the plate portion 48 toward the abutment surface 49a. The annular step portion includes an annular end surface 50a facing the plate portion 48. When the restricting member 8 is fixed to the handle 5, two restricting member fixing screws 51 with heads are inserted into the long hole 50.

[0038] A circular opening 52 is provided on the other side portion of the plate portion 48 in the long side direction, that is, the protruding portion 48a protruding from the connecting portion 49 in the plate portion 48. The circular opening 52 is located at the center of the short side direction of the plate portion 48. The inner diameter of the circular opening 52 is larger than the outer diameter of the abrasive bundle 41 of the brush 3. In addition, in the protruding portion 48a, a first cutout recess 53 is provided on one side of the circular opening 52 in the short side direction of the plate portion 48, which is recessed from one end edge of the plate portion 48 toward the circular opening 52. In addition, in the protruding portion 48a, a second cutout recess 54 is provided on the other side of the circular opening 52 in the short side direction of the plate portion 48, which is recessed from the other end edge of the plate portion 48 toward the circular opening 52. The opening edge of the first cutout recess 53 and the opening edge of the second cutout recess 54 have an arc shape, and the arc shape has the same curvature as the curvature of the circular opening 52.

[0039] (Attachment of the Brush to the Brush Holding Member) When the brush 3 is held in the brush holder 2, the abrasive bundle holder 42 of the brush 3 is inserted into the first brush holder hole 7 (1) or the second brush holder hole 7 (2). Figure 1 As shown, when the brush 3 is inserted into the first brush holding hole 7 ( 1 ), the brush fixing screw 38 is screwed into the brush fixing threaded hole 45 of the abrasive bundle holding seat 42 inserted into the first brush holding hole 7 ( 1 ) via the first through hole 35 .

[0040] Here, when the brush fixing screw 38 is screwed into the brush fixing threaded hole 45, the brush fixing screw 38 penetrates the abrasive bundle holding seat 42 in the Y-axis direction, and its front end abuts against the opposite surface portion opposite to the first through hole 35 on the inner peripheral wall surface of the first brush holding hole 7 (1). When the brush fixing screw 38 is further screwed in from this state, the abrasive bundle holding seat 42 is pressed against the peripheral wall surface portion opposite to the opposite surface (including the peripheral wall surface portion of the opening edge of the first through hole 35) on the inner peripheral wall surface of the first brush holding hole 7 (1). Thus, the brush 3 is fixed to the brush holding member 6. In addition, when the brush 3 is inserted into the second brush holding hole 7 (2), the brush fixing screw 38 is screwed into the brush fixing threaded hole 45 of the abrasive bundle holding seat 42 inserted into the second brush holding hole 7 (2) through the second through hole 36. Thus, the brush 3 is held in the second brush holding hole 7 (2).

[0041] (The brush holding member is fixed to the handle) from Figure 2 , Figure 3 It can be seen that when the brush holding member 6 holding the brush 3 is fixed to the handle 5, the fixing screw 18 is inserted from the Y2 direction into the fixing hole 14 provided in the center of the support portion 11 of the handle 5. In addition, the brush holding member 6 is placed on the placement surface 12 of the support portion 11, and the fixing screw 18 is screwed into the threaded hole 39 of the brush holding member 6. The fixing screw 18 is screwed in until its head abuts against the annular end surface 17 of the fixing hole 14.

[0042] Here, when the brush holding member 6 is placed on the placement surface 12, the brush holding member 6 is rotated around the Y axis so that the brush 3 is extended in a desired direction around the Y axis. Figure 1 , Figure 4 As shown, the annular outer peripheral surface 33 of the brush holding component 6 is brought into contact with the first plane 21 and the second plane 22 of the wall portion 13. As a result, the first plane 21 and the second plane 22 are in surface contact with the two outer peripheral surface portions 33a from the radial outside, respectively. Therefore, the brush holding component 6 is changed to a state of being positioned at a predetermined rotation angle position around the Y axis. That is, the first plane 21 and the second plane 22 of the wall portion 13 and the outer peripheral surface portion 33a of the brush holding component 6 are a positioning mechanism 60 for positioning the brush holding component 6 around the Y axis.

[0043] After the brush holding member 6 is positioned to the desired rotation angle position around the Y axis, when the fixing screw 18 is screwed into the screw hole 39, the brush holding member 6 is fixed to the support portion 11 of the handle 5 in the positioned state. Therefore, the fixing screw 18 and the threaded hole 39 of the brush holding member 6 are the fixing mechanism 61 that fixes the positioned brush holding component 6 to the handle 5.

[0044] Here, if Figure 1 As shown, when the brush 3 is held in the first brush holding hole 7 (1), the brush holding member 6 can be positioned at five rotation angle positions within a range where the brush 3 does not interfere with the wall portion 13. Therefore, when the brush 3 is held in the first brush holding hole 7 (1), the brush 3 can be extended in five different directions. In addition, when the brush 3 is held in the second brush holding hole 7 (2), the brush holding member 6 can be positioned at six rotation angle positions within a range where the brush 3 does not interfere with the wall portion 13. Therefore, when the brush 3 is held in the second brush holding hole 7 (2), the brush 3 can be extended in six different directions. Therefore, in the polishing brush 1, by positioning the brush holding member 6 at the first rotation angle position to the eleventh rotation angle position around the Y axis, the brush 3 can be extended in 11 different directions.

[0045] Figure 6 , Figure 7 3 is an illustration of the extension direction of the brush 3. Figure 6 As shown, when the brush 3 protrudes from the X-axis to the X1 direction (0°) as the first direction A, the extension direction of the brush 3 can be changed to the second direction B inclined from the first direction A to the Z1 direction by 22.5°, the third direction C inclined from the first direction A to the Z1 direction by 45°, the fourth direction D inclined from the first direction A to the Z1 direction by 67.5°, the fifth direction E inclined from the first direction A to the Z1 direction by 90°, and the sixth direction F inclined from the first direction A to the Z1 direction by 112.5°. When the brush 3 is facing the fifth direction E, the brush 3 extends in the Z1 direction. When the brush 3 is facing the sixth direction F, the brush 3 extends radially outward in the X2 direction. When the brush 3 is extended along the first direction A, the third direction C, and the fifth direction E, the brush 3 is retained in the first brush retaining hole 7 (1). When the brush 3 is extended along the second direction B, the fourth direction D, and the sixth direction F, the brush 3 is retained in the second brush retaining hole 7 (2).

[0046] In addition, if Figure 7As shown, the extension direction of the brush 3 can be changed to the seventh direction G inclined 22.5° from the first direction A to the Z2 direction, the eighth direction H inclined 45° from the first direction A to the Z2 direction, the ninth direction I inclined 67.5° from the first direction A to the Z2 direction, the tenth direction J inclined 90° from the first direction A to the Z2 direction, and the eleventh direction K inclined 112.5° from the first direction A to the Z2 direction. When the brush 3 is facing the tenth direction J, the brush 3 extends in the Z2 direction. When the brush 3 is facing the eleventh direction K, the brush 3 extends radially outward in the X2 direction. When the brush 3 is extended along the eighth direction H and the tenth direction J, the brush 3 is retained in the first brush retaining hole 7 (1). When the brush 3 is extended along the seventh direction G, the ninth direction I, and the eleventh direction K, the brush 3 is retained in the second brush retaining hole 7 (2).

[0047] (Restriction of installation of components) Figure 8 1 is an explanatory diagram of an example of fixing the limiting member 8 to the handle 5. The limiting member 8 is fixed to the front end surface 26 of the support portion 11, the side surface 27 in the Z1 direction, or the side surface 28 in the Z2 direction. More specifically, Figure 8 As shown, when the brush 3 faces any one of the first direction A, the second direction B, and the seventh direction G, the limiting member 8 is fixed to the front end face 26 (the end face in the X1 direction) of the support portion 11. That is, the abutting surface 49a of the connecting portion 49 is abutted against the front end face 26 of the support portion 11, and two limiting member fixing screws 51 are inserted into the long hole 50 from the plate portion 48 side and screwed into a pair of first threaded holes 26a provided on the front end face 26. The two limiting member fixing screws 51 are screwed in until their heads abut against the annular end face 50a of the long hole 50.

[0048] Here, when the brush 3 is oriented in the first direction A, the abrasive bundle 41 of the brush 3 is passed through the circular opening 52. In the state where the abrasive bundle 41 of the brush 3 is passed through the circular opening 52, the opening edge (opposing portion) of the circular opening 52 in the limiting member 8 is opposed to the portion between the front end of the abrasive bundle 41 and the brush holding member 6 from both sides of the circumferential direction around the Y axis (both sides of the Z axis direction) with a predetermined gap. When the brush 3 is oriented in the second direction B, the opening edge (opposing portion) of the first cutout recess 53 in the limiting member 8 is opposed to the portion between the front end of the abrasive bundle 41 and the brush holding member 6 from the other side of the circumferential direction around the Y axis (Z2 direction side) with a predetermined gap. When the brush 3 is oriented in the seventh direction G, the opening edge (opposing portion) of the second cutout recess 54 in the limiting member 8 is opposed to the portion between the front end of the abrasive bundle 41 and the brush holding member 6 from one side of the circumferential direction around the Y axis (Z1 direction side) with a predetermined gap.

[0049] In addition, when the brush 3 faces any one of the fourth direction D, the fifth direction E, and the sixth direction F, the limiting member 8 is fixed to the side surface 27 of the support portion 11 in the Z1 direction. That is, the contact surface 49a of the connection portion 49 is brought into contact with the side surface 27 of the support portion 11 in the Z1 direction, and two limiting member fixing screws 51 are passed through the long hole 50 from the plate portion 48 side and screwed into a pair of second threaded holes 27a provided on the side surface 27 of the support portion 11 in the Z1 direction. Here, when the brush 3 faces the fifth direction E, the abrasive bundle 41 of the brush 3 is passed through the circular opening 52. In the state where the abrasive bundle 41 of the brush 3 is passed through the circular opening 52, the opening edge of the circular opening 52 in the limiting member 8 corresponds to the portion between the front end of the abrasive bundle 41 and the brush holding member 6 from both sides of the circumferential direction around the Y axis (both sides of the X axis direction) with a predetermined gap. When the brush 3 is oriented in the sixth direction F, the opening edge of the first cutout recess 53 in the limiting member 8 corresponds to the portion between the front end of the abrasive bundle 41 and the brush holding member 6 with a predetermined gap from the other side (X1 direction side) in the circumferential direction around the Y axis. When the brush 3 is oriented in the fourth direction D, the opening edge of the second cutout recess 54 in the limiting member 8 corresponds to the portion between the front end of the abrasive bundle 41 and the brush holding member 6 with a predetermined gap from one side (X2 direction side) in the circumferential direction around the Y axis.

[0050] Furthermore, when the brush 3 faces any one of the ninth direction I, the tenth direction J, and the eleventh direction K, the limiting member 8 is fixed to the side surface 28 of the support portion 11 in the Z2 direction. That is, the contact surface 49a of the connection portion 49 is brought into contact with the side surface 28 of the support portion 11 in the Z2 direction, and two limiting member fixing screws 51 are passed through the long hole 50 from the plate portion 48 side and screwed into a pair of third threaded holes 28a provided on the side surface 28 of the support portion 11 in the Z2 direction. Here, when the brush 3 faces the tenth direction J, the abrasive bundle 41 of the brush 3 is passed through the circular opening 52. In the state where the abrasive bundle 41 of the brush 3 is passed through the circular opening 52, the opening edge of the circular opening 52 in the limiting member 8 is opposite to the portion between the front end of the abrasive bundle 41 and the brush holding member 6 from both sides of the circumferential direction around the Y axis (both sides of the X axis direction) with a predetermined gap therebetween. When the brush 3 is oriented in the ninth direction I, the opening edge of the first cutout recess 53 in the limiting member 8 corresponds to the portion between the front end of the abrasive bundle 41 and the brush holding member 6 with a predetermined gap from the other side (X2 direction side) of the circumference around the Y axis. When the brush 3 is oriented in the eleventh direction K, the opening edge of the second cutout recess 54 in the limiting member 8 corresponds to the portion between the front end of the abrasive bundle 41 and the brush holding member 6 with a predetermined gap from one side (X1 direction side) of the circumference around the Y axis.

[0051] Here, when the limiting member 8 is mounted on the handle 5, any one of the opening edge of the circular opening 52, the opening edge of the first cutout recess 53, and the opening edge of the second cutout recess 54 in the limiting member 8 becomes an opposing portion that is spaced apart from the abrasive beam 41 by a predetermined interval around the Y axis. Therefore, during grinding, when the brush 3 is expanded due to a load applied to the brush 3 from the workpiece side, the expanded abrasive beam 41 contacts the opposing portion of the limiting member 8 (the opening edge of the circular opening 52, the opening edge of the first cutout recess 53, or the opening edge of the second cutout recess 54), thereby limiting further expansion of the brush 3.

[0052] In addition, when the brush 3 is oriented in the third direction C or the eighth direction H, it is not necessary to install the limiting member 8 on the handle 5. That is, when the brush 3 is oriented in the third direction C or the eighth direction H, the brush 3 is tilted 45° relative to the main axis of the lathe during grinding. In this case, it is easier to ensure the rigidity of the abrasive bundle 41 when it contacts the workpiece than when the brush 3 is oriented in other directions. Therefore, even if the grinding brush 1 does not include the limiting member 8, the expansion of the brush 3 can be suppressed.

[0053] (Grinding method) Next, an example of polishing of various types of components (workpieces) by the polishing brush 1 of this example will be described. Fig. 9 This is a first example of a method of grinding a workpiece using the grinding brush 1 . Fig.10 This is a second example of the method of polishing a workpiece using the polishing brush 1 . Fig.11 This is a third example of the method of polishing a workpiece using the polishing brush 1 . Fig.12 This is a fourth example of a method for grinding a workpiece using the grinding brush 1. Figures 9 to 12 As shown, during the grinding process, the component is supported on the spindle 101 of the lathe 100 and rotated around the rotation center axis L of the spindle 101. Here, the direction along the rotation center axis L of the spindle 101 is the Z-axis direction of the grinding brush 1.

[0054] Fig. 9 6 is an example of grinding of the first threaded member 65. The first threaded member 65 includes a disc-shaped head 66 and a shaft 67 protruding from the head 66. The shaft 67 includes a threaded portion 68 formed with an external thread from the front end side to the head 66 and an annular groove 69. The threaded portion 68 is formed by tapping. In such a first threaded member 65, burrs may sometimes be generated at the cutting end portion 68a of the threaded portion 68 (the boundary portion between the threaded portion 68 and the annular groove 69).

[0055] When removing the burrs of the cutting end portion 68a of the threaded portion 68, the brush 3 is held in the second brush holding hole 7 (2) of the brush holding member 6. In addition, the brush holding member 6 is positioned at a predetermined rotation angle position around the Y axis relative to the handle 5, and the brush 3 is extended in the second direction B. Then, the grinding brush 1 with the brush 3 facing the second direction B is connected to the tool post 102 in a posture where the handle 5 extends in the X-axis direction. Then, while the first threaded member 65 is rotated around the rotation center axis L of the spindle 101, the front end of the brush 3 is brought into contact with the cutting end portion 68a of the threaded portion 68.

[0056] In this example, the brush 3 contacts the cut end portion 68a of the first screw member 65 at an angle of 67.5°. In this example, since the brush 3 can contact the outer peripheral surface of the first screw member 65 at a large angle, burrs generated on the cut end portion 68a can be removed.

[0057] Fig.10 This is an example of grinding of the second threaded component 71. The second threaded component 71 is rod-shaped and has a relatively long dimension in the direction of the axis L0. The second threaded component 71 includes a threaded portion 72 having an external thread formed from the front end side to the base end side and a cylindrical portion 73 having no external thread formed thereon. The threaded portion 72 is formed by tapping. In such a second threaded component 71, burrs may sometimes be generated on the outer peripheral surface of the second threaded component 71, such as the top portion of the external thread or the boundary portion between the threaded portion 72 and the cylindrical portion 73.

[0058] Here, if Fig.10 As shown, when removing burrs from the outer peripheral surface of a long component such as the second threaded part 71, the second threaded component 71 is supported on the spindle 101 of the lathe 100, and the front end of the second threaded component 71 is supported by the core pressing portion 103 of the lathe 100. In addition, the brush 3 is held in the second brush holding hole 7 (2) of the brush holding member 6. Next, the brush holding member 6 is positioned at a predetermined rotation angle position around the Y axis relative to the handle 5, so that the brush 3 is extended in the fourth direction D. Then, the grinding brush 1 with the brush 3 facing the fourth direction D is connected to the tool rest 102 in a posture in which the handle 5 extends in the X-axis direction. Then, while the first threaded component 65 is rotated around the rotation center axis L of the spindle 101, it is brought into contact with the outer peripheral surface of the second threaded component 71.

[0059] In this example, the brush 3 contacts the outer peripheral surface of the second threaded member 71 at an angle of 22.5°. In addition, in this example, the handle 5 is located in the X2 direction of the second threaded member 71, and the brush 3 is extended from the handle 5 in the X1 direction. Therefore, the burrs on the outer peripheral surface of the second threaded member 71 can be removed without the brush 1 interfering with the core pressing portion 103 during the grinding process.

[0060] Fig.11 2 is an example of grinding of the third threaded component 75. The third threaded component 75 includes a disc-shaped head 76 and a shaft 77 protruding from the head 76. The shaft 77 includes a threaded portion 78 formed with an external thread from the front end side to the head 76 and an annular groove 79. The threaded portion 78 is formed by tapping. In addition, a hole 80 recessed in the radial direction is provided on the threaded portion 78. In such a third threaded component 75, burrs may sometimes be generated at the opening edge of the hole 80 in the valley 78a of the external thread.

[0061] When removing the burrs of the valley bottom 78a of the external thread, as Fig.11 As shown, the brush 3 is held in the first brush holding hole 7 (1) of the brush holding member 6. In addition, the brush holding member 6 is positioned at a predetermined rotation angle position around the Y axis relative to the handle 5, so that the brush 3 is extended in the first direction A. Then, the grinding brush 1 with the brush 3 facing the first direction A is connected to the tool post 102 in a posture where the handle 5 extends in the X-axis direction. Then, while the third threaded member 75 is rotated around the rotation center axis L of the spindle 101, the front end of the brush 3 is brought into contact with the valley bottom 78a of the external thread.

[0062] In this example, the brush 3 vertically contacts the threaded portion 78 of the third threaded member 75. In this example, since the brush 3 vertically contacts the threaded portion 78 of the third threaded member 75, burrs generated on the valley 78a of the external thread in the threaded portion 78 can be removed.

[0063] Fig.12 81 is an example of grinding of the disk member 81. The disk member 81 includes a circular recess 82 at the center of one end surface thereof. The circular recess 82 is formed by cutting. In such a disk member 81, burrs may be generated on the annular inner peripheral surface of the circular recess 82.

[0064] When removing the burrs generated on the annular inner peripheral surface of the circular recess 82, as shown in FIG. Fig.12 As shown, the brush 3 is held in the second brush holding hole 7 (2) of the brush holding member 6. In addition, the brush holding member 6 is positioned at a predetermined rotation angle position around the Y axis relative to the handle 5, so that the brush 3 is extended in the sixth direction F. Then, the grinding brush 1 with the brush 3 facing the sixth direction F is connected to the tool rest 102 in a posture where the handle 5 extends in the X-axis direction. Then, while the disk member 81 is rotated around the rotation center axis L of the spindle 101, the front end of the brush 3 is brought into contact with the annular inner circumferential surface of the circular recess 82.

[0065] In this example, the polishing brush 1 can direct the brush 3 in the sixth direction F facing the base end side (X2 direction) of the handle 5. Therefore, the annular inner peripheral surface of the circular recess 82 provided on the end surface of the disk member 81 can be polished.

[0066] (Function and Effect) According to the grinding brush 1 of this example, the brush 3 extends radially outward from the brush holding member 6 centered on the Y-axis. The brush holding member 6 is supported by the front end portion of the handle 5 extending in the X-axis direction, and is fixed to the handle 5 in a state of being positioned at a plurality of rotation angle positions around the Y-axis. Therefore, if the brush holding member 6 is positioned at different rotation angle positions around the Y-axis and fixed to the handle 5, the extension direction of the brush 3 can be changed. Therefore, even when the handle 5 is connected to the tool rest 102 of the lathe 100 without a clamp for angle adjustment, the extension direction of the brush 3 can be changed.

[0067] In addition, the brush holding member 6 is positioned at a plurality of rotation angle positions, so that even if the extension direction is changed, the extension direction of the brush 3 can be accurately returned to the extension direction before the change. That is, according to the polishing brush 1 of this example, the extension direction of the brush 3 before the change can be accurately reproduced.

[0068] In this example, the contour shape of the brush holding member 6 when viewed from the Y-axis direction is a regular polygon. In addition, the handle 5 includes a first plane 21 and a second plane 22 as a positioning mechanism 60, and the first plane 21 and the second plane 22 can be in surface contact with two outer peripheral surface portions 33a extending linearly in the circumferential direction in the annular outer peripheral surface 33 of the brush holding member 6 from the radial outside. Therefore, after the brush holding member 6 is positioned by the positioning mechanism 60, the brush holding member 6 can be prevented or suppressed from shaking in the circumferential direction.

[0069] In this example, the brush holding hole 7 provided in the annular outer peripheral surface 33 of the brush holding member 6 is recessed radially inward. In addition, the brush holding member 6 includes a first brush holding hole 7 (1) and a second brush holding hole 7 (2) as the brush holding hole 7, the first brush holding hole 7 (1) being provided in the outer peripheral surface portion 33a extending linearly in the circumferential direction in the annular outer peripheral surface 33, and the second brush holding hole 7 (2) being provided so as to straddle the ridge 33b between two outer peripheral surface portions 33a extending linearly in the circumferential direction in the annular outer peripheral surface 33. In addition, the brush 3 is selectively held in the first brush holding hole 7 (1) or the second brush holding hole 7 (2). Therefore, the extending direction of the brush 3 can be changed in the case where the brush 3 is held in the first brush holding hole 7 (1) and in the case where the brush 3 is held in the second brush holding hole 7 (2). Therefore, by combining the structure in which the brush holding member 6 includes two brush holding holes 7 and the structure in which the brush holding member 6 is positioned and fixed at a plurality of rotation angles about the Y axis, the ability to distinguish the direction in which the brush 3 is extended can be improved.

[0070] In addition, in this case, Figure 6 As shown in the second illustration from the right of FIG. 1 , when the brush holding member 6 is positioned at a predetermined rotation angle position (first rotation angle position) and fixed to the handle 5, the brush 3 extends radially outward from the brush holding member 6 and in a second direction B that is further toward the X1 direction than the Z axis. Figure 6 As shown in the leftmost illustration, the brush holding member 6 is positioned at a rotation angle position (second rotation angle position) different from the above and fixed to the handle 5, so that the brush 3 extends toward the radial outside of the brush holding member 6 and along the sixth direction F that is further toward the X2 direction than the Z axis. Therefore, according to the polishing brush 1 of this example, it is possible to perform Figures 9 to 11 The grinding process and Fig.12 Both types of grinding processes are shown.

[0071] In addition, in this case, Figure 6 As shown in the third illustration from the right of FIG. 1 , when the brush holding member 6 is positioned at a predetermined rotation angle position (first rotation angle position) and fixed to the handle 5, the brush 3 extends radially outward from the brush holding member 6 and in a third direction C that is further toward the Z1 direction than the X-axis. Figure 7 As shown in the second explanatory diagram from the left, the brush holding member 6 is positioned at a rotation angle position (second rotation angle position) different from the above and fixed to the handle 5, so that the brush 3 extends in the eighth direction H toward the radial outside of the brush holding member 6 and toward the Z2 direction more than the X-axis. Therefore, according to the grinding brush 1 of this example, grinding can be performed when the workpiece is located in the Z1 direction of the grinding brush 1 and when the workpiece is located in the Z2 direction of the grinding brush 1.

[0072] In addition, the brush holder 2 of this example has: a handle 5 having an axis L0 extending in the X-axis direction; a brush holder 6 supported at one end portion of the handle 5 in the X-axis direction; a brush holder hole 7 provided on the annular outer peripheral surface 33 of the brush holder 6 around the Y-axis; a positioning mechanism 60 for positioning the brush holder 6 at a plurality of rotation angle positions around the Y-axis; and a fixing mechanism 61 for fixing the positioned brush holder 6 to the handle 5. In addition, when the brush 3 is held in the brush holder hole 7 of the brush holder 2, the brush 3 protrudes radially outward from the brush holder 6 and extends outward from the handle 5 when viewed from the Y-axis direction. Therefore, after the brush 3 is held in the brush holder 6, the brush holder 6 is rotated around the Y-axis to position and fix it, so that the extension direction of the brush 3 can be changed.

[0073] (Variation Example) In addition, in the above example, the brush holding member 6 is positioned by the first plane 21 and the second plane 22 of the wall portion 13 abutting against the two outer peripheral surface portions 33a of the brush holding member 6 from the radial outside, but the brush holding member 6 can also be positioned by a positioning surface provided on the wall portion 13 abutting against one outer peripheral surface portion 33a of the brush holding member 6 from the radial outside. In addition, the brush holding member 6 can also be positioned by three positioning surfaces provided on the wall portion 13 abutting against the three outer peripheral surface portions 33a of the brush holding member 6 from the radial outside.

[0074] Fig.13 1 is an explanatory diagram of an example in which the positioning mechanism 60 has three positioning surfaces (planes). In this case, the wall portion 13 includes a shape that is plane-symmetrical with respect to an imaginary plane including the X-axis and the Y-axis. The surface of the wall portion 13 facing the X1 direction is perpendicular to the mounting surface 12. The surface of the wall portion 13 facing the X1 direction includes a plane 25 (third positioning surface) extending in the Z-axis direction at the center in the Z-axis direction. In addition, the wall portion 13 includes a first plane 21 (first positioning surface) and a second plane 22 (second positioning surface) adjacent to each other via a recessed portion recessed in the X2 direction on both sides of the plane 25 in the Z direction. In addition, the wall portion 13 includes a third plane 23 located on the opposite side of the curved surface 20 of the first plane 21 and a fourth plane 24 located on the opposite side of the curved surface 20 of the second plane 22. The third plane 23 is inclined in the X2 direction from the first plane 21 toward the Z1 direction. The fourth plane 24 is inclined in the X2 direction from the second plane 22 toward the Z2 direction. The brush holding member 6 is positioned about the Y-axis by the first flat surface 21 , the second flat surface 22 , and the flat surface 25 provided on the wall portion 13 respectively contacting the three outer peripheral surface portions 33 a of the annular outer peripheral surface 33 from the radially outer side.

[0075] In addition, in the above example, the contour shape of the brush holding member 6 when viewed from the Y-axis direction is a regular octagon, but the contour shape of the brush holding member 6 when viewed from the Y-axis direction may also be a regular triangle, a square, or a regular polygon larger than the regular triangle. In such a case, the brush holding member 6 may also include a first brush holding hole 7 (1) and a second brush holding hole 7 (2), the first brush holding hole 7 (1) being provided in an outer peripheral surface portion 33a extending linearly in the circumferential direction of the annular outer peripheral surface 33, and the second brush holding hole 7 (2) being provided across a ridgeline 33b between two outer peripheral surface portions 33a extending linearly.

[0076] Here, Fig.14 It is an explanatory diagram of another example of the positioning mechanism. Fig.14 (a) is a plan view of the support portion 11 of the handle 5 as seen from the Y-axis direction. Fig.14 (b) is a plan view of the brush holding member 6 positioned on the handle 5 as viewed from the Y-axis direction. Fig.14 Another example of a positioning mechanism 60A shown includes: a positioning threaded hole 85 formed at a specified angular position around the Y-axis in the mounting surface 12; a positioning threaded insertion hole 86 located on the outer peripheral side of the threaded hole 39 of the brush retaining member 6; and a positioning screw 87 screwed into the positioning threaded hole 85 via the positioning threaded insertion hole 86.

[0077] More specifically, if Fig.14 As shown in (a) of FIG. 1 , the positioning mechanism 60A includes two positioning screw holes 85 at two locations of the mounting surface 12 spaced 90° apart around the Y axis. Fig.14 As shown in (b), four positioning thread insertion holes 86 are provided on the brush holding member 6. In this example, the brush holding member 6 is provided with positioning thread insertion holes 86 at two locations spaced 180° around the Y axis, and positioning thread insertion holes 86 are provided at two locations spaced 45° from the two positioning thread insertion holes 86 in the same rotation direction.

[0078] When the brush holding member 6 is positioned around the Y axis, as shown in FIG. Fig.14 As shown in (b), the positioning screw 87 is inserted into one of the four positioning thread insertion holes 86, and the positioning screw 87 is screwed into one of the two positioning thread holes 85 formed on the mounting surface 12. In this way, the brush holding member 6 can also be positioned at eleven rotation angle positions in the handle 5. Therefore, the extension direction of the brush 3 can be changed to eleven directions in the same manner as the above-mentioned polishing brush 1.

[0079] Furthermore, the restriction member 8 can also be fixed to the brush holding member 6 . Fig.15 1 is an explanatory diagram of a limiting member fixed to the brush holding member 6. In this case, Fig.15 As shown, the limiting member 8A is a cylindrical body, including a cylindrical portion 91 of the abrasive beam holding seat 42 surrounding the brush 3 from the outer peripheral side and an extended portion 92 extending from the cylindrical portion 91 to the side of the abrasive beam 41. The cylindrical portion 91 includes two through holes 93 at positions spaced 180° apart. The two through holes 93 can be connected to the brush fixing threaded hole 45 of the abrasive beam holding seat 42 by rotating the limiting member 8A surrounding the abrasive beam holding seat 42 along the outer peripheral surface of the abrasive beam holding seat 42. The extended portion 92 is cut along an imaginary plane obliquely intersecting the axis L0 of the cylindrical body, and its cross section includes an elliptical shape. The extended portion 92 is located on the outer peripheral side of the abrasive beam 41 held by the brush holding member 6. A predetermined gap is formed between the extended portion 92 and the abrasive beam 41.

[0080] On the other hand, the brush holding hole 7 of the brush holding member 6 has an inner diameter dimension capable of inserting the abrasive bundle holding seat 42 and surrounding the cylindrical portion 91 of the cylindrical body of the abrasive bundle holding seat 42 from the outer peripheral side.

[0081] When the limiting member 8A is fixed to the brush holding member 6, the brush 3 is arranged on the inner peripheral side of the limiting member 8A, and the limiting member 8A is rotated on the outer peripheral side of the abrasive bundle holding seat 42, so that the brush fixing threaded hole 45 of the abrasive bundle holding seat 42 and the two through holes 93 are connected. Then, the cylindrical portion 91 of the limiting member 8A is inserted into the brush holding hole 7 together with the abrasive bundle holding seat 42, and the brush fixing threaded hole 45 is screwed into the brush fixing threaded hole 45 of the abrasive bundle holding seat 42. Thus, the brush 3 and the limiting member 8A are fixed to the brush holding member 6.

[0082] Here, when the two through holes 93 of the limiting member 8A are connected to the brush fixing threaded hole 45 of the abrasive bundle holding seat 42, the portion of the extended portion 92 of the limiting component 8A that extends longer to the front end side of the abrasive bundle 41 can be selectively arranged on one side or the other side of the abrasive bundle 41. Which side of the abrasive bundle 41 the portion of the extended portion 92 of the limiting component 8A that extends longer to the front end side of the abrasive bundle 41 is to be arranged on is selected based on the extending direction of the brush 3 extending from the handle 5.

Claims

1. A grinding brush, characterized in that: When three mutually orthogonal axes are set as an X-axis, a Y-axis and a Z-axis, the direction along the X-axis is set as an X-axis direction, the direction along the Y-axis is set as a Y-axis direction, and the direction along the Z-axis is set as a Z-axis direction, the grinding brush includes a brush holder and a brush, wherein, The brush holder comprises: a handle having an axis line consistent with the X-axis; a brush holding member, the brush holding member being supported by the front end portion of the handle; a brush holding hole, the brush holding hole being provided in the annular outer peripheral surface of the brush holding member around a Y-axis orthogonal to the axis line; a positioning mechanism, the positioning mechanism positioning the brush holding member at a first rotation angle position around the Y-axis or a second rotation angle position different from the first rotation angle position; and a fixing mechanism, the fixing mechanism fixing the positioned brush holding member to the handle, The brush is detachably held in the brush holding hole, protrudes radially outward from the brush holding member, and extends outward from the handle when viewed in the Y-axis direction.

2. The abrasive brush according to claim 1, characterized in that: The brush holding member has a regular polygonal outline when viewed from the Y-axis direction. The handle includes a positioning surface as the positioning mechanism, and the positioning surface can be brought into surface contact with a portion of the annular outer peripheral surface of the brush holding member that extends linearly in the circumferential direction from the radially outer side.

3. The abrasive brush according to claim 1, characterized in that: The outline shape of the brush holding component when viewed from the Y-axis direction is a regular polygon. The handle includes a first positioning surface and a second positioning surface as the positioning mechanism, and the first positioning surface and the second positioning surface can be in surface contact with two outer peripheral surface portions extending linearly in the circumferential direction of the annular outer peripheral surface of the brush holding member from the radially outer side.

4. The abrasive brush according to claim 1, characterized in that: The brush holding member has a regular polygonal outline when viewed from the Y-axis direction. The brush holding hole is recessed toward the radial inner side, The brush holding hole includes a first brush holding hole and a second brush holding hole, wherein the first brush holding hole is provided in a peripheral surface portion of the annular outer peripheral surface extending linearly in the circumferential direction, and the second brush holding hole is provided across a ridgeline between two peripheral surface portions adjacent in the circumferential direction in the annular outer peripheral surface. The brush is selectively held in the first brush holding hole or the second brush holding hole.

5. The abrasive brush according to claim 1, characterized in that: The Z axis passes through the intersection of the X axis and the Y axis, When the brush holding member is positioned at the first rotation angle position and fixed on the handle, the brush extends toward the radial outside in a first direction toward the side closer to the X-axis direction than the Z-axis, and when the brush holding member is positioned at the second rotation angle position and fixed on the handle, the brush extends toward the radial outside in a second direction toward the other side closer to the X-axis direction than the Z-axis.

6. The abrasive brush according to claim 1, characterized in that: The Z axis passes through the intersection of the X axis and the Y axis, When the brush holding member is positioned at the first rotation angle position and fixed on the handle, the brush extends toward the radial outside in a first direction toward the side closer to the Z-axis direction than the X-axis, and when the brush holding member is positioned at the second rotation angle position and fixed on the handle, the brush extends toward the radial outside in a second direction toward the other side closer to the Z-axis direction than the X-axis.

7. The abrasive brush according to claim 1, characterized in that: The brush has an abrasive bundle consisting of a plurality of linear abrasives and an abrasive bundle holding seat for holding one end of the abrasive bundle. The abrasive bundle holding seat is inserted into the brush holding hole.

8. The abrasive brush according to claim 1, characterized in that: The abrasive brush has a limiting member, which is fixed to the handle and limits the expansion of the brush. The brush has an abrasive bundle consisting of a plurality of linear abrasives and an abrasive bundle holding seat for holding one end of the abrasive bundle. The abrasive bundle holding seat is inserted into the brush holding hole, The restricting member includes a facing portion that faces a portion between the other end portion of the abrasive bundle and the brush holding member with a gap therebetween in the circumferential direction around the Y-axis.

9. The abrasive brush according to claim 1, characterized in that: The polishing brush has a limiting member, which is fixed to the brush holding member and limits the expansion of the brush. The brush has an abrasive bundle consisting of a plurality of linear abrasives and an abrasive bundle holding seat for holding one end of the abrasive bundle. The abrasive bundle holding seat is inserted into the brush holding hole, The restricting member faces a portion between the other end portion of the abrasive bundle and the brush holding member with a gap therebetween in the circumferential direction around the Y-axis.

10. A brush holder for holding a brush, characterized in that: When three mutually orthogonal axes are set as the X-axis, the Y-axis and the Z-axis, the direction along the X-axis is set as the X-axis direction, the direction along the Y-axis is set as the Y-axis direction, and the direction along the Z-axis is set as the Z-axis direction, the brush holder has: A handle having an axis extending along the X-axis direction; a brush holding member supported at one end portion of the handle in the X-axis direction; a brush holding hole, the brush holding hole being provided on an annular outer peripheral surface around the Y axis in the brush holding member; a positioning mechanism, the positioning mechanism positioning the brush holding member at a first rotation angle position around the Y-axis or a second rotation angle position different from the first rotation angle position; as well as a fixing mechanism that fixes the positioned brush holding member to the handle, When the brush is held in the brush holding hole, the brush protrudes radially outward from the brush holding member and extends outward from the handle when viewed in the Y-axis direction.

Images