JP2015089394A - Brush rotation drive - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a brush rotation drive having high safety and operability and capable of highly accurately performing surface processing of an object.SOLUTION: The brush rotation drive includes: brushes 31 that are retained by a universal holding part 26 so as to be able to rotate and swing within a fixed angle; and a brush guide 4 that has brush holding parts 41, a storage base plate 42 for storing the brush holding parts 41 in a direction crossing with a central axis of revolution of the brush 31, and a protrusion amount adjusting part 43 that adjusts protrusion amounts of the brush holding parts 41 with respect to the storage base plate 42.

Description

  The present invention relates to a brush rotation driving device that performs surface treatment such as polishing and cleaning of articles.

  2. Description of the Related Art There is a brush rotation driving device that performs surface treatment (polishing or cleaning) of an object by bringing the tip of the brush into contact with the object while rotating the brush. If a force from one direction continues to act on the brush while using the brush driving device, the brush will always bend in one direction, and will be wrinkled in a bent state. When the brush with a heel is used, the brush comes into contact with an object at an intermediate portion, not at the tip, so that the effect of removing foreign matter on the surface of the object is weak (or ineffective).

  In the brush rotation driving device, the brushes are rotated while rotating (revolving) in the circumferential direction in order to make the brush wrinkles less likely to stick, and the rotation speed is compared with the revolution speed. By slowing down significantly, it is suppressed that the said brush is wrinkled in the state (for example, patent document 1).

  Further, depending on the material and length of the brush, it may not be possible to sufficiently suppress wrinkling of the brush by merely rotating the plurality of brushes while revolving. In order to suppress such brush wrinkling, a brush rotation driving device as described above is disclosed that includes a holding portion that holds the vicinity of the tip of each of the plurality of brushes ( For example, Patent Document 2). By adopting a configuration that holds the vicinity of the tip portions of the plurality of brushes, it is possible to suppress wrinkles in a bent state regardless of the length and material of the plurality of brushes. Thereby, since the tips of the plurality of brushes come into contact with the surface of the object, it is possible to suppress a reduction in the removal efficiency of the foreign matter.

  In the brush rotation driving device, when the plurality of brushes are arranged in parallel with the rotation axis, the tips of the plurality of brushes fit within the projected area in the rotation axis direction of the main body of the brush rotation driving device. End up. In the brush rotation driving device having such a configuration, when the tips of the plurality of brushes are brought into contact with the corners of the portions where obstacles such as walls and protrusions are formed, the main body of the brush rotation driving device Is in contact with an obstacle and it is difficult to bring the plurality of brushes into contact with corners. In addition, during use of the brush rotation driving device, a member for turning the plurality of brushes may come into contact with the obstacle, which may damage the brush rotation driving device or injure the user. There is a fear.

  Therefore, the brush rotation driving device disclosed in Patent Document 2 discloses a device in which the plurality of brushes are fixed obliquely so that the tip ends away from the rotation axis. Since the plurality of brushes are attached obliquely, the tips of the plurality of brushes protrude outside the brush rotation driving device when viewed in the axial direction, so that narrow portions such as corners and seams are formed. In addition, the tip of the brush can be brought into contact with it to remove foreign matters efficiently.

JP 2007-289460 A JP 2013-1111738 A

  When the surface treatment of the object is performed by the brush rotation driving device, the brush is shaved and shortened by friction with the surface of the object. When a plurality of brushes are fixed so that their tips are far from the rotation axis of the main body, when the plurality of brushes are scraped, the tips of the brushes approach the axial direction, and the plurality of brushes The amount of protrusion from the axial projection surface of the main body of the brush rotation drive device at the tip changes.

  When surface treatment is performed using the brush rotation driving device, it is difficult for the user to visually recognize the position of the tip of the brush because it is hidden behind dust and the device (for example, an object (for example, a mark) The surface treatment is performed while estimating the tip positions of the plurality of brushes based on the positional relationship with the obstacle). However, if the amount of protrusion at the tips of the plurality of brushes changes, the estimation may be wrong, and a portion that is not subjected to surface treatment may be formed, or the main body of the brush rotation driving device may be accidentally brought into contact with an obstacle. There is a fear.

  An object of the present invention is to provide a brush rotation driving device that has high safety and operability and can accurately perform surface treatment of an object.

Therefore, in order to achieve the above object, the present invention has a plurality of brushes whose tip contacts with the target surface and scrapes foreign matter from the target surface, and each brush can be rotated and swung within a predetermined angle. A plurality of free holding portions to be held, a rotating member that rotates and rotatably supports the plurality of free holding portions, and an eccentric position rotatably connected to each eccentric position of the plurality of free holding portions. A member, an eccentric pin that rotates relative to the rotating member and pushes the eccentric member to revolve and rotate the eccentric member at a position shifted from the center of the rotating member, and hold the tip side of each brush And a brush guide attached to the rotating member so that the axial distance can be adjusted, and the brush guide holds the brush holding portion with respect to the center axis of revolution of the brush. A housing board for accommodating in a direction intersecting, and a protrusion amount adjustment portion that adjusts a protruding amount with respect to the housing board of the brush holder.

  The term “brush” as used in the present specification refers to a member that is provided on a plurality of circumferences and that is rotationally driven around the circumference of the circumference to be used for cleaning or polishing. In the present invention, metal, plastic, cloth, or the like is made into a brush shape, and is used for surface treatment such as floor cleaning in offices, schools, hospitals, metal polishing, rust removal, and paint removal operations. In the configuration of the present invention, by rotating and revolving the brush and adjusting the protrusion amount of the brush, deformation of the brush can be suppressed and the efficiency of the surface treatment can be increased. Note that the rotation and revolution described here are forcibly driven, respectively. In addition, examples of the shape of the brush include a brush shape, a brush shape, a brush shape, and a ring shape. In addition to these, those having a plurality of cleaning members and capable of removing an object attached to the surface by rubbing the target surface with the tip can be widely employed.

  The “rotating member” is a member that arranges a plurality of brushes on the circumference, and each brush is revolved by being driven to rotate by a motor. The rotating member is rotatably provided with a free holding portion for attaching each brush, and each brush is supported in a state where it can rotate (rotate) at that position.

  “Eccentric member” refers to a member that rotatably couples the free holding portion provided on the rotating member at a predetermined eccentric position. Therefore, the pitch circle of the universal holding portion provided on the rotating member and the pitch circle of the connecting portion of each of the eccentric holding portions of the eccentric member have the same diameter (substantially the same diameter). All the holding parts and each brush are rotated in the same direction.

  The “eccentric pin” refers to a member that supports the eccentric member by contacting the eccentric member at a position where the rotational center of the eccentric member deviates from the rotational center of the rotating member. The eccentric member is pushed by the eccentric pin and rotates relative to the rotating member. In this case, when the eccentric pin rotates once relative to the rotating member, each universal holding portion and each brush rotate once relative to the rotating member. In other words, since each brush revolves while rotating, each brush rotates while maintaining a certain direction, and the bending direction of each brush during operation changes over almost the entire circumferential surface. Can be prevented. In addition, the rotation direction of each universal holding part and each brush is determined by the relative rotation direction of the eccentric pin with respect to the rotation member.

  Many of these surface treatment devices (brush rotation drive devices) are used for cleaning and polishing by rotating the brush at a high rotational speed. However, each brush is intended to prevent deformation of the brush, which is an object of the present invention. It is better that the rotation speed is not so high. The rotation of the brush is determined by the relative rotational speed of the eccentric pin with respect to the rotating member, and the eccentric pin is rotated so as to slightly advance or slightly delay with respect to the rotating member. It is possible to set a large rotation speed ratio between the rotation speed of the pin relative to the rotation member and the rotation speed of the rotation member. Thereby, it is not necessary to provide a reduction gear having a large reduction ratio, the apparatus can be miniaturized, and the operability is improved.

  The said structure WHEREIN: The said universal holding part may be provided so that the front-end | tip of the said brush may protrude outside the axial direction projection surface of the said rotation member by centrifugal force, when the said rotation member rotates.

  In the above-described configuration, the rotating member has a sub-rotating member that is provided so as to have the same central axis as the rotating member, and rotates independently with respect to the rotating member, and the eccentric pin is connected to the sub-rotating member. You may attach so that rotation is possible.

  In the above configuration, the rotating member and the auxiliary rotating member have a cylindrical outer peripheral surface, and the outer peripheral surface of the rotating member and the auxiliary rotating member is a belt hooking portion around which a belt transmitting a rotational force is wound. And the outer diameter of the belt hook portion of the rotating member may be different from the outer diameter of the belt hook portion of the auxiliary rotating member.

  The said structure WHEREIN: The belt hung around each belt hanging part of the said rotation member and the said subrotation member may be hung on the different transmission member attached to the common power shaft.

  In the above configuration, the ratio of the outer diameter between the outer diameter of the rotating member and the transmitting member around which the belt transmitting the rotating force to the rotating member is wound, the outer diameter of the auxiliary rotating member, and the rotating force on the rotating member. The ratio of the outer diameter of the belt that transmits the belt to the transmission member on which the belt is wound may be determined such that the length of the belt to be wound is the same.

  The said structure WHEREIN: You may provide the pressing roller which presses the outer peripheral surface of the said rotation member so as to oppose the force which acts on the said rotation member with the tension | tensile_strength of the said belt.

  In the above configuration, the brush holding portion is provided with a pin formed so as to protrude outward from the accommodation substrate, and the protrusion amount adjustment portion is rotatably attached to the accommodation substrate, By having the pins of each brush holding part inserted and rotated, the pin is held by the inner wall of the adjustment hole and has an adjustment hole formed in a spiral shape to adjust the protruding amount of the brush holding part. Also good.

  The said structure WHEREIN: The said adjustment hole may have a magnitude | size which the said pin can move to the accommodation direction of the said brush holding | maintenance part.

  According to the present invention, it is possible to provide a brush rotation driving device that has high safety and operability and can accurately perform surface treatment of an object.

It is a side view of an example of the brush rotation drive device concerning the present invention. It is the disassembled perspective view which decomposed | disassembled the rotation part of the brush rotational drive apparatus shown in FIG. It is the perspective view seen from the upper part of the brush part which attached the brush guide. It is the perspective view seen from the upper direction of a brush guide. It is the perspective view seen from the downward direction of the brush part which attached the brush guide shown to FIG. 3A. It is a perspective view of a brush. It is an expansion perspective view of the state which decomposed | disassembled the brush attachment part and the universal holding part. It is an expansion perspective view which shows attachment to the brush attachment part of a brush holder. It is a side view of a brush attachment part. It is a figure which shows attachment of the brush holder to a brush attachment part. It is an expansion perspective view of the other example of a brush attachment part. It is an expansion perspective view which shows the attachment to the brush attachment part of the other example of a brush holder. It is a disassembled perspective view of a brush guide. It is the figure which looked at the brush guide of the state which the brush holding | maintenance part protrudes most from the lower side. It is the figure which looked at the same brush guide as FIG. 9A from the upper side. It is the figure which looked at the brush guide of the state in which a part of brush holding part was accommodated inside from the lower side. It is sectional drawing which cut | disconnected the brush guide to the diameter direction. It is sectional drawing of the brush guide cut | disconnected by the cutting line orthogonal to FIG. 10A in the center. It is the schematic which shows the attachment state of a 1st rotation member, an eccentric member, and an eccentric pin. It is a figure which shows the relative operation | movement of an eccentric member and an eccentric pin. It is a figure which shows the operation state of a 1st rotation member, an eccentric member, and an eccentric pin. It is a top view which shows the state of a 1st rotation member and a pressing roller.

  A brush rotation driving device according to the present invention will be described with reference to the drawings.

(First embodiment)
FIG. 1 is a side view of an example of a brush rotation driving device according to the present invention, FIG. 2 is an exploded perspective view in which a rotating portion of the brush rotation driving device shown in FIG. 1 is disassembled, and FIG. 3A is attached with a brush guide. FIG. 3B is a perspective view seen from above the brush portion, and FIG. 3B is a perspective view seen from above the brush guide. FIG. 4 is a perspective view seen from below of the brush portion to which the brush guide shown in FIG. 3A is attached.

  5A is a perspective view of the brush, FIG. 5B is an enlarged perspective view of a state in which the brush attachment portion and the free holding portion are disassembled, and an enlarged perspective view showing attachment of the brush holder to the brush attachment portion. It is. FIG. 6A is a side view of the brush attachment portion, and FIG. 6B is a view showing attachment of the brush holder to the brush attachment portion.

  FIG. 7A is an enlarged perspective view of another example of the brush attachment portion, and FIG. 7B is an enlarged perspective view showing attachment of the brush holder to the brush attachment portion of another example. 8 is an exploded perspective view of the brush guide, FIG. 9A is a view of the brush guide with the brush holding portion protruding most from the lower side, and FIG. 9B is a view of the same brush guide as FIG. 9A from the upper side. FIG. 9C is a view of the brush guide in a state in which a part of the brush holding portion is housed inside as viewed from below. 10A is a cross-sectional view of the brush guide cut in the diameter direction, and FIG. 10B is a cross-sectional view of the brush guide cut along a cutting line orthogonal to the center of FIG. 10A.

  FIG. 11A is a schematic view showing a mounting state of the first rotating member, the eccentric member, and the eccentric pin, FIG. 11B is a diagram showing a relative operation of the eccentric member and the eccentric pin, and FIG. 11C is a diagram showing the first rotating member, It is a figure which shows the operation state of an eccentric member and an eccentric pin. FIG. 12 is a plan view showing a state of the first rotating member and the pressing roller.

  The brush rotation drive device A is a surface treatment device that rubs the surface of an object to be treated such as a floor surface or a structure with a rotating brush to remove adhering coating, oil, dirt, and the like. As shown in FIG. 1, the brush rotation driving device A includes a main handle Hd1, a sub handle Hd2, a frame 1, a rotating unit 2, a brush unit 3, a brush guide 4, a power transmission unit 5, power, Part 6. The main handle Hd1 has a power cable attached to one end. The sub handle Hd2 is attached to the frame 1 so as to be orthogonal to the main handle Hd1. By using the main handle Hd1 and the sub handle Hd2, the user can hold and use the brush rotation driving device A with both hands.

  The frame 1 is a housing for holding the rotating unit 2 and the power unit 6. The frame 1 is fixed to the main handle Hd1 and has a cylindrical portion 11 that houses a part of the power unit 6 therein. The frame 1 is formed by combining and joining metal plate members in a cylindrical shape having a rectangular cross section, and includes a mounting portion 12 that extends a flat plate on the upper side of the frame 1 to the side opposite to the main handle Hd1. The attaching portion 12 is to which the rotating portion 2 is attached and includes a bearing portion 13 that rotatably supports a rotation support shaft 24 described later of the rotating portion 2. Further, the frame 1 includes a presser roller 14 that is rotatably attached to a plate material that is disposed on the side and that is in contact with a side peripheral surface of a later-described first rotating member 21 of the rotating unit 2 and presses the first rotating member 21. ing. The above-described sub handle Hd2 is attached to a plate material arranged on the side of the frame 1.

  As shown in FIG. 1, the rotating part 2 is rotatably supported by a bearing part 13 of the frame 1. As shown in FIG. 2, the rotating unit 2 includes a first rotating member 21, a second rotating member 22, an eccentric member 23, a rotation support shaft 24, a support member 25, a universal holding portion 26, and an eccentric pin 27. Yes. At least the first rotating member 21, the second rotating member 22, and the eccentric member 23 are formed of an engineering plastic having required heat resistance and strength. Thereby, weight reduction of the rotation part 2 is possible and the energy (electric power) required for rotation can be reduced. Moreover, since the rotating part 2 is lightweight, the moment generated by the rotation can be reduced, and the brush rotation driving device A is easy to use. In addition to the engineering plastic, a light material having required heat resistance and strength may be employed.

  The first rotating member 21 includes a disc portion 211 and a cylindrical side wall portion 212 that is integrally connected to the edge portion of the disc portion 211 and protrudes upward from the disc portion 211. The first rotating member 21 has a sliding guide portion 213 that integrally protrudes downward from the lower surface of the disc portion 211. The first rotating member 21 has four sliding guide portions 213, and the four sliding guide portions 213 are arranged at equal intervals in the circumferential direction. The sliding guide part 213 is provided with a sliding concave hole 2131 (see FIG. 4) at the lower end part for slidably supporting a guide shaft 45 described later of the brush guide 4.

  The outer peripheral surface of the sliding guide portion 213 is formed integrally with the outer peripheral surface of the side wall portion 212. Then, the rotation support shaft 24, the universal holding portion 26, and a brush attachment portion 33 (described later) attached to the universal holding portion 26 are accommodated within the axial projection surface of the first rotation member 21. As a result, the sliding guide portion 213 serves as a protective member for suppressing the deformation and breakage of the rotation support shaft 24 and the universal holding portion 26 when the first rotating member 21 comes into contact with a standing member such as a wall surface or a column. Also works.

  The rotation support shaft 24 passes through the center of the disk portion 211, and the disk portion 211 and the rotation support shaft 24 are fixed so as not to slide with each other. The upper end portion of the rotation support shaft 24 is rotatably supported by the bearing portion 13. A retaining member (not shown) is attached to the tip portion of the rotation support shaft 24 so as not to come off from the bearing portion 13. Thereby, the first rotating member 21 rotates together with the rotation support shaft 24.

  The first rotating member 21 includes a belt hooking portion 214 around which a first belt 51 (to be described later) of the power transmission portion 5 is wound around the outer peripheral surface of the side wall portion 212. The belt hooking portion 214 has a surface shape that suppresses the slip of the first belt 51 (here, although it is a circumferential groove, it is not limited thereto).

  Four support members 25 are disposed on the disk portion 211 of the first rotation member 21 so as to be rotatable (rotatable around the center of the support member 25). The four support members 25 are arranged at positions that do not overlap the sliding guide portion 213 in the central axis direction. A free holding portion 26 is connected to the lower portion of the support member 25. The universal holding portion 26 is provided so as to protrude below the disc portion 211. The flexible holding portions 26 are provided in the same number (four in this case) as the support members 25 and are arranged in a portion between the adjacent sliding guide portions 213. The support member 25 and the universal holding portion 26 may be configured to be detachable or may be configured integrally.

  Further, on the end surface of the distal end of the universal holding portion 26, three support convex portions 261 are arranged at equal intervals in the circumferential direction (see FIGS. 2, 5B, 5C, etc.). Moreover, the universal holding part 26 is provided with the internal thread part (not shown) for attaching the below-mentioned brush attachment part 314, and the internal thread part is formed in the center part of the end surface from which the support convex part 261 protrudes.

  The outer peripheral surface of the first rotating member 21 has an intermediate portion having a smooth surface at a portion between the sliding guide portion 213 and the belt hooking portion 214. The press roller 14 of the frame 1 is in contact with this intermediate portion.

  As shown in FIG. 2, the eccentric member 23 includes a drive ring 231 and a passive ring 232. The drive ring 231 is an annular member having a through hole in the center. Similarly to the drive ring 231, the passive ring 232 is an annular member having a through hole in the center. A passive ring 232 is fixed above the drive ring 231. The through-hole formed in the center of the drive ring 231 and the passive ring 232 has the same inner diameter, and both rings are fixed so that the central axes coincide. The fixing of the drive ring 231 and the passive ring 232 can be screwed, but is not limited thereto, and even if the rotating unit 2 rotates around the rotation support shaft 24 such as pin joining, A bonding method in which the drive ring 231 and the passive ring 232 are difficult to separate can be widely used.

  As shown in FIG. 11A, the drive ring 231 is connected to each of the four support members 25 at a position (eccentric position) deviated from the central axis of each support member 25. At this time, the center of the rotation support shaft 24 (point C1 in the figure) and the center of the drive ring 231 (point C2 in the figure) are deviated, that is, the drive ring 231 is relative to the first rotation member 21. Eccentric. As described above, the drive ring 231 is rotatably attached to the eccentric position of the support member 25, so that the drive ring 231 rotates (revolves) around the central axis 24 and rotates around the center of the drive ring 231 ( The support member 25 is rotated by rotating. Note that when the drive ring 231 rotates once, the four support members 25 rotate once.

  Returning to FIG. 2, the second rotating member 22 will be described. The second rotating member 22 includes a disk portion 221, a side wall portion 222, and a bearing 223. The disc portion 221 is disposed so as to close the upper surface of the second rotating member 22, and the second rotating member 22 includes a convex portion protruding upward in the axial direction. The convex portion is formed at the center of the disc portion 221, and a bearing 223 is attached to the convex portion so as to be concentric with the second rotating member 22. When viewed from the second rotating member 22, the bearing 223 supports the rotation support shaft 24 in a rotatable manner. In other words, the second rotation member 22 is attached to the rotation support shaft 24 via the bearing 223, and the second rotation member 22 and the rotation support shaft 24 can rotate independently.

  In addition, although illustration is abbreviate | omitted, in order that the rotation support shaft 24 may restrict | limit the approach to the 1st rotation member 21 of the 2nd rotation member 22, a regulation part (not shown), such as a level | step difference which contacts the bearing 223, and a flange. It has. Further, the convex portion is formed to secure a certain width or more in the axial direction of the bearing 223 and stably support the rotation support shaft 24, and is configured to ensure a certain width or more of the bearing 223. In some cases, it may be omitted.

  A support shaft 225 fixed to the disk part 221 is provided at a position (eccentric position) shifted from the center of the disk part 221. The support shaft 225 protrudes downward from the disk portion 221 so as to be parallel to the rotation support shaft 24 supported by the bearing 223, and is disposed at a portion inside the side wall portion 222. A cylindrical eccentric pin 27 is rotatably attached to the support shaft 225. For example, as shown in FIG. 11A, the eccentric pin 27 is disposed so as to come into contact with the outer peripheral surface of the passive ring 232 of the eccentric member 23. As the second rotating member 22 rotates, the eccentric pin 27 rotates about the rotation support shaft 24 (hereinafter referred to as revolution). Further, when the eccentric pin 27 revolves, the eccentric pin 27 slides relatively on the outer peripheral surface of the passive ring 232.

  The side wall portion 222 extends downward integrally from the peripheral edge portion of the disc portion 221. A belt hook portion 224 is formed on the outer peripheral surface of the side wall portion 222. The belt hooking portion 224 is wound around a second belt 52 described later of the power transmission portion 5. Similar to the first rotating member 22, the belt hooking portion 222 has a surface shape that suppresses slippage of the second belt 52 (here, the groove is a circumferential groove, but is not limited thereto).

  The second rotating member 22 may include a balance weight (not shown) on the opposite side of the eccentric pin 27 across the center. By providing the balance weight, the second rotating member 22 can be stably rotated. When the eccentric pin 27 is lightweight and the rotation balance of the second rotating member 22 is small, or when the rotation speed of the second rotating member 22 is set low, the balance weight may be omitted.

  Next, the brush unit 3 will be described. The brush rotation driving device A includes four brush units 3. 5A to 5C are enlarged views of the respective parts constituting the brush unit. In addition, the display of a brush is abbreviate | omitted in FIG. 5B and FIG. 5C.

  As shown in FIGS. 3A, 4, and 5 </ b> A to 5 </ b> C, the brush unit 3 includes a brush 31, a brush holder 32, a brush attachment portion 33, a retaining pin 34, and a pressing member 35.

  The brush 31 includes a plurality of twisted thin wires and is attached to the brush holder 32. As the brush 31, for example, a steel wire having a diameter of 0.4 mm to 0.5 mm twisted together can be exemplified. Note that the material, length, number, and the like of the thin lines are determined by the object to be removed. The brush 31 has a configuration in which a plurality of fine wires are twisted, but is not limited thereto, and may be one in which the thin wires are only bundled. Moreover, you may combine the twisted thing and the thing only bundled.

  The brush holder 32 includes a cylindrical part 321 and a disk part 322 that is connected to the cylindrical part 321 and has a larger diameter than the cylindrical part 321. Further, a retaining pin 34 projects in the radial direction from the outer surface of the cylindrical portion 321. The cylindrical portion 321 has a space inside, and the brush 31 is inserted into the space. And the cylindrical part 321 is fixed so that the brush 31 may not come off by press-fitting in the disc part 322.

  As shown in FIG. 5B, the brush mounting portion 33 includes three loosely fitting convex portions 36 that protrude from the upper end portion. The loose fitting protrusions 36 are provided at equal intervals in the circumferential direction. The brush mounting portion 33 has a space inside, and a screw 37 capable of moving (swinging) the central axis within a certain range is provided in the internal space. The screw 37 is arranged so as not to come off to the loose fitting convex portion 36 side by a retaining portion (not shown) provided in the internal space of the brush attachment portion 33. The screw 37 is provided so that the tip thereof protrudes from the tip of the loose fitting convex portion 36.

  The three loosely fitting convex portions 36 of the brush attachment portion 33 are inserted into the space between the adjacent supporting convex portions 261 of the universal holding portion 26. At this time, the loose fitting convex portion 36 and the supporting convex portion 261 are formed so as to have a gap in the circumferential direction. Then, the screw 37 is screwed into a female screw (not shown) of the universal holding portion 26 to attach the brush attachment portion 33 to the universal holding portion 26. At this time, the brush attachment portion 33 is attached to the universal holding portion 26 so that a gap is formed in the axial direction.

  A gap is formed in the axial direction between the tip of the loose fitting convex portion 36 and the brush mounting portion 33, and a gap is formed in the circumferential direction between the loose fitting convex portion 36 and the support convex portion 261. As described above, since the screw 37 is swingably attached to the brush attachment portion 33 within a certain range, the brush attachment portion 33 is swingably attached to the universal holding portion 26. . In other words, the brush attachment portion 33 and the universal holding portion 26 have the same configuration as that of the universal joint, and can cross rotation axes of each other and transmit rotation (rotational force).

  The brush attachment portion 33 will be described in detail. As shown in FIGS. 5B, 5C, 6A, and 6B, the brush attachment portion 33 has a main body portion 330 on which a loose fitting convex portion 36 is formed, and a spring having a smaller diameter than the main body portion 330 and a spring 333 that is externally fitted. A holding portion 334 and a guide portion 335 having a smaller diameter than the spring holding portion 334 are connected in the axial direction. Further, a sliding groove 331 extending in the axial direction from the distal end and a retaining groove 332 extending in the circumferential direction are formed at the distal end portion of the guide portion 335 so as to be continuous with the inner portion of the sliding groove 331. ing.

  As shown in FIGS. 5B and 5C, the retaining member 35 is attached to the guide portion 335 of the brush attachment portion 33. The retaining member 35 is slidable in the axial direction, and the movement in the axial direction is regulated by a pin (screw) attached to a guide portion 335 (not shown) and a long hole (not shown) through which the pin passes (prevention of retaining). )

  The retaining member 35 includes a flange portion 351 having substantially the same outer diameter as the main body portion 330 at an end portion on the spring holding portion 334 side, and a rectangular notch 352 formed at an end portion opposite to the flange portion 351. It has. As shown in FIG. 6A, the circumferential length of the notch 352 is substantially the same as the circumferential length of the retaining groove 332, but is not limited thereto. When the retaining member 35 moves to the lowermost side (in the state shown in FIG. 6A), the sliding groove 331 can be hidden, and a shape that exposes the retaining groove 332 can be widely employed.

  A spring 333 is attached so that the spring holding portion 334 is fitted, and one end portion of the spring 333 comes into contact with a step between the main body portion 330 and the spring holding portion 334, and the other end portion is It is in contact with the flange portion 351. The retaining member 35 is pushed down to the main body side of the brush mounting portion 33 by the spring 333 (see FIG. 6A). The spring 333 is attached in a state compressed to some extent in advance. That is, the retaining member 35 is always pushed down by the spring 333.

  As shown in FIG. 6A, when the retaining member 35 is pushed down, the retaining member 35 covers a portion connected to the retaining groove 332 of the sliding groove 331 and the notch 352 overlaps the retaining groove 332 in the radial direction. Are arranged as follows. 6B, when the retaining member 35 is pulled up against the elastic force of the spring 333, the portion of the sliding groove 331 connected to the retaining groove 332 is exposed to the outside.

  The retaining member 35 has an inner diameter between the outer diameter of the guide portion 335 and the outer diameter of the spring holding portion 334. Therefore, the retaining member 35 can be pulled up until the flange portion 351 comes into contact with the stepped portion between the spring holding portion 334 and the guide portion 335.

  Then, as shown in FIGS. 5C and 6B, the retaining member 35 is pulled up, and the retaining pin 34 extends from the end of the sliding groove 331 with the sliding groove 331 and the retaining groove 332 exposed to the outside. The cylindrical portion 321 of the brush holder 32 is inserted into the guide portion 335 of the brush attachment portion 331 so as to move. After the retaining pin 34 moves to the back of the sliding groove 331, the brush holder 32 is rotated and the retaining pin 34 is moved to the retaining groove 332.

  Then, after the retaining pin 34 moves to the retaining groove 332, the retaining member 35 is returned to the original position. If the retaining member 35 is pushed down while the retaining pin 34 is moved to the retaining groove 332, the retaining pin 34 cannot be moved from the retaining groove 332. As described above, the retaining pin 34 cannot be moved from the retaining groove 332, so that the brush holder 32 is held by the brush mounting portion 33. The brush holder 32 is movable in the circumferential direction with respect to the brush mounting portion 33 within a range in which the retaining pin 34 moves in the retaining groove 332.

  As described above, the direction in which the retaining pin 34 is movable is the circumferential direction, and the direction in which the retaining member 35 is movable is the axial direction. Therefore, even if a force acts on the brush 31 or the brush holder 32 and the retaining pin 34 moves in the circumferential direction, the retaining member 35 is moved in the axial direction, so that the retaining member 35 is moved. I can't. That is, holding the brush holder and the brush with the brush holding portion 33 prevents the brush holder 32 from falling off the brush mounting portion 33 even if a force acts on the brush 31 and / or the brush holder 32. Can do. Also, the brush holder 32 can be attached and detached by lifting the retaining member 35 and rotating and inserting / removing the brush holder 32. Therefore, the brush holder 32 is easily attached and detached.

  Further, the brush mounting portion can use a configuration other than this configuration. Another configuration of the brush mounting portion will be described with reference to the drawings. As shown in FIGS. 7A and 7B, the lower end portion of the brush attachment portion 33 b has a cylindrical shape into which the column portion 321 of the brush holder 32 can be inserted. The outer peripheral portion of the brush attachment portion 33b includes a sliding groove 331b that penetrates from the internal space to the outside and extends in the axial direction. Further, the sliding groove 331b is formed so that the tip is widened, so that the retaining pin 34 can be easily inserted into the sliding groove 331b.

  The brush attachment portion 33b is formed with a retaining groove 332b extending in the circumferential direction from the sliding groove 331b. The retaining pin 34 can move inside the sliding groove 331b and the retaining groove 332b. It is preferable that the retaining groove 332b extends in the direction opposite to the rotation direction of the brush unit 3 (the rotation direction of the universal holding portion 26). By configuring the retaining groove 332b in this manner, the retaining pin 34 is moved to the back of the retaining groove 332b when the brush unit 3 rotates, so that the retaining of the brush holder 32 is more reliable. become.

  A presser spring 333b that presses the retaining pin 34 is disposed on the brush mounting portion 33b. The presser spring 333b is wound around a concave groove formed in the circumferential direction on the outer surface of the brush mounting portion 33b, and has a configuration that follows the shape of the tip of the sliding groove 331b. It is formed so as to elastically seal a portion of the recess groove 332b intersecting the sliding groove 331b at the portion wound around the concave groove.

  When the retaining pin 34 is disposed in the retaining groove 332b, the retaining groove 332b is sealed with a presser spring 333b. Unless the force exceeding the elastic force of the presser spring 333b acts on the brush holder 32, the retaining pin 34 is prevented from moving to the sliding groove 331b. As described above, it is possible to prevent the brush holder 32 from being unexpectedly detached from the brush attachment portion 33b by the effect of the direction of the retaining groove 332b and the presser spring 333b.

  Next, details of the brush guide 4 will be described with reference to the drawings. As shown in FIGS. 4 and 8, the brush guide 4 includes a brush holding portion 41, a receiving substrate 42, a protrusion amount adjusting member 43, a mounting screw 44, a guide shaft 45, a shaft support member 46, a pressing member 47, and a tightening screw 48. And an anti-rotation screw 49.

  The brush holding portion 41 holds the vicinity of the tip of the brush 31 and is provided in the same number as the brush unit 3 (here, four). The brush holding portion 41 includes a U-shaped holding frame 411, a fixing portion 412 fixed to an end portion on the opposite side to the curved portion of the holding frame 411, and a pin 413 attached to the fixing portion 412. (Refer FIG. 9A, FIG. 9C, etc.).

  The holding frame 411 is a frame body made of metal or the like and having high strength, and includes a curved portion and a pair of straight portions that are connected to both ends of the curved portion and are parallel to each other. Since the holding frame 411 has a curved portion, the holding frame 411 and / or the protruding portion may be damaged even when the brush rotating drive device A is in contact with the protruding portion such as a wall or a column during use of the brush rotation driving device A. Is suppressed. Further, the curved portion of the holding frame 411 is formed in an arc shape, so that the brush 31 is restrained from being caught when the brush 31 rotates, and the burden on the brush 31 is reduced. Further, the pair of straight portions of the holding frame 411 serves as a slide rail when the brush holding portion 41 slides with respect to the accommodation substrate 42.

  The fixing portion 412 is fixed to the end portion on the opposite side to the curved portion of the pair of linear portions of the holding frame 411. For example, welding can be used for the fixing, but the fixing is not limited thereto. The pin 413 is a columnar member that protrudes from the fixed portion 412. The pin 413 is provided to adjust the protrusion amount (expansion / contraction amount) of the brush holding portion 41 from the accommodation substrate 42 by engaging with an adjustment hole 432 described later of the protrusion amount adjusting member 43.

  The accommodation substrate 42 is a disk-shaped member, and is formed on the lower surface and includes an accommodation groove 421 extending radially inward from the outer peripheral surface, and a guide groove 422 formed in a side wall portion inside the accommodation groove 421 and extending in the radial direction. Have. The accommodation substrate 42 includes a brush retracting portion 423 (here, an arc-shaped notch) formed on the upper surface and notched in the radial direction.

  As shown in FIGS. 9A and 9C, the accommodation groove 421 is formed in a cross shape so as not to prevent the movement of the pin 413 when the brush holding portion 41 is accommodated. Further, the brush 31 has a width larger than the outer diameter of the brush 31 so that the brush 31 can be retracted to the brush retracting portion 423. The guide groove 422 is formed so that the linear portion of the holding frame 411 is slidably inserted, and plays a role as a guide when the brush holding portion 41 slides inside the accommodation substrate 42.

  The brush retracting part 423 is a recess for retracting the brush 31 so that it is not sandwiched between the brush holding part 41 and the accommodation substrate 42 when the brush holding part 41 moves to the innermost side. The back of the brush holding portion 41 is formed in a curved surface shape, but is not limited to this, and a shape that does not hinder (not hinder) the rotation of the brush 31 can be widely adopted.

  Further, as shown in FIG. 8, the accommodation substrate 42 is provided with four fixing holes 424 into which the guide shaft 45 is inserted and fixed. The fixing holes 424 are arranged at equal intervals in the circumferential direction, and are formed between the adjacent brush retracting portions 423.

  As shown in FIGS. 10A and 10B, a hole through which the attachment screw 44, the fastening screw 48, and the rotation prevention screw 49 pass is provided in the central portion of the accommodation substrate 42. The fastening screw 48 and the rotation prevention screw 49 rotate around the attachment screw 44 with respect to the accommodation substrate 42 together with the protrusion amount adjusting member 43. Therefore, the grooves through which these screws pass are also shaped so that these screws can rotate (for example, holes that are large enough to pass through the mounting screw 44, the clamping screw 48, and the anti-rotation screw 49, or a circular arc in plan view). A hole having a different shape). As shown in FIGS. 10A and 10B, the accommodation board 42 includes a through-hole having a size through which all of the attachment screw 44, the fastening screw 48, and the rotation prevention screw 49 can pass.

  As shown in FIGS. 8, 9A, and 9B, the protrusion amount adjusting member 43 has a shape and a size that can be accommodated inside the accommodation substrate 42 in a plan view. In the outer peripheral portion of the protrusion amount adjusting member 43, four concave portions 431 formed so as to be deep in the circumferential direction are arranged at equal intervals in the circumferential direction. The protrusion amount adjusting member 43 includes four adjustment holes 432 that penetrate in the thickness direction and have a planar shape that is spirally bent. The central portion has a screw hole through which the mounting screw 44, the tightening screw 48, and the rotation preventing screw 49 pass.

  The protrusion amount adjusting member 43 is rotatably attached to the accommodation substrate 42. As shown in FIGS. 9A and 9C, the protrusion amount adjusting member 43 is attached so that the adjustment hole 432 is inserted into the pin 413 of the brush holding portion 41. The pin 413 slides relatively along the inner wall of the adjustment hole 432 by rotating the protrusion amount adjusting member 43 around the mounting screw 44 with respect to the accommodation substrate 42. Since the adjustment hole 432 has a spiral shape, the pin 413 is pushed by the adjustment hole 432 by rotating the protrusion amount adjustment member 43, and the brush holding portion 41 moves to the inside of the accommodation substrate 42. . That is, by rotating the protrusion amount adjusting member 43, it is possible to adjust the length of the brush holding portion 41 protruding from the accommodation substrate 42. Since the holding frame 411 of the brush holding portion 41 is guided by the guide groove 421 extending in the radial direction of the accommodation substrate 42, the moving direction of the brush holding portion 41 is the radial direction of the accommodation substrate 42.

  The attachment screw 44 is a member that is inserted from the protruding amount adjusting member 43 side and penetrates the center of the accommodation substrate 42. The mounting screw 44 is provided at the center of the first rotating member 21 and is screwed into a female screw having the same center axis as the center axis of the rotation support shaft 24. By rotating the attachment screw 44, the brush holding portion 41 approaches and separates from the first rotating member 21. In the drawing shown in FIG. 8 and the like, a screw is not formed on the head side portion of the screw. However, the present invention is not limited to this, and the screw may be formed over the entire length. The attachment screw 44 may be attached so as to be rotatable with respect to the accommodation substrate 42 and the protrusion amount adjusting member 43.

  A shaft support member 46 attached so as to sandwich the accommodation substrate 42 is provided at the central portion of the accommodation substrate 42. The shaft support member 46 includes a first support plate 461 disposed between the accommodation substrate 42 and the protrusion amount adjusting member 43, and a second support plate disposed on the opposite side of the accommodation substrate 42 of the first support plate 461. 462. As shown in FIG. 10B, the second support plate 462 has a female screw hole into which the rotation prevention screw 49 can be screwed.

  Two anti-rotation screws 49 are provided at positions symmetrical with respect to the mounting screw 44. The rotation prevention screw 49 penetrates the first support plate 461 and the accommodation substrate 42 from the protrusion amount adjusting member 43 side, and is screwed to the second support plate 462. By attaching the rotation prevention screw 49 in this way, the relative rotation between the protrusion amount adjusting member 43 and the first support plate 461 is suppressed. Further, by tightening the accommodation substrate 42 with the first support plate 461 and the second support plate 462 using the rotation prevention screw 49, the rotation of the first support plate 461, that is, the rotation of the protrusion amount adjusting member 43 is suppressed. ing.

  An attachment screw 44 passes through the centers of the first support plate 461 and the second support plate 462 in a rotatable manner. A retaining member 441 is attached to a portion of the attachment screw 44 protruding from the second support plate 462. The retaining member 441 prevents the attachment screw 44 from coming off from the second support plate 462 while allowing rotation. The retaining member 441 uses a double nut, but is not limited to this.

The attachment screw 44 penetrates through a pressing member 47 provided on the opposite side of the second support plate 462 with the retaining member 441 interposed therebetween. And the fastening screw 48 is provided on the line orthogonal to the line which connects a pair of rotation prevention screw 49 so that the attachment screw 44 may be pinched | interposed (refer FIG. 8, FIG. 10A etc.). The tightening screw 48 is inserted from the protruding amount adjusting member 43 side, passes through the first support plate 461, the accommodation substrate 42, and the second support substrate 462, and is screwed into the pressing member 47. The rotation of the retaining member 441 is suppressed by moving the pressing member 47 with the tightening screw 48 and pressing it against the retaining member 441. Thereby, rotation of the attachment screw 44 to which the retaining member 441 is fixed is suppressed.

  The guide shaft 45 is inserted into a fixing hole 424 provided in the housing substrate 42 so as to protrude upward, and is fixed so as to be parallel to the mounting screw 44. The guide shaft 45 and the fixing hole 424 may be fixed by press-fitting, adhesion, etc., but are not limited to this, and are firmly fixed so that the guide shaft 45 does not move or come off. The possible methods can be widely adopted.

  A guide shaft 45 is slidably inserted into a sliding concave hole 2131 provided in the sliding guide portion 213, and is used as a sliding guide when the brush guide 4 approaches and separates from the first rotating member 21. Is done. Also, four guide shafts 45 are inserted into the corresponding sliding concave holes 2131. Thereby, the guide shaft 45 also functions to suppress the rotation of the brush guide 4.

  Next, the operation of the brush guide 4 will be described. As described above, the central axis of the brush unit 3 attached to the universal holding part 26 is attached so that an angle can be formed with respect to the central axis of the universal holding part 26. By rotating the first rotating member 21 with the brush unit 3 attached to the universal holding portion 26, the brush unit 3 is urged outward by centrifugal force. Thereby, the front-end | tip of the brush 31 of the brush unit 3 moves toward an outer side. Since the brush 31 is disposed inside the brush holding portion 41, it is pressed by the holding frame 411 of the brush holding portion 41. Thereby, the amount of protrusion from the axial projection surface of the first rotating member 21 at the tip of the brush 31 is adjusted to be within a certain amount (see FIGS. 9A and 9B).

  As shown in FIGS. 9A, 9C, etc., the adjustment hole 432 is larger than the outer diameter of the pin 413. Therefore, the pin 413 can move in the sliding direction of the brush holding portion 41. Therefore, when a force directed toward the inside of the accommodation substrate 42 is applied to the brush holding portion 41, the brush holding portion 41 is accommodated inside the accommodation substrate 42 within a range in which the pins 413 can move.

  For example, when the brush rotation driving device A is rotating, when the brush holding portion 41 comes into contact with an external member, a force directed toward the inside of the accommodation substrate 42 acts on the brush holding portion 41. As described above, since the brush holding portion 41 can move inside the accommodation substrate 42, the brush holding portion 41 moves inside the accommodation member 42. Since the brush holding part 41 moves to the inside of the accommodation substrate 42, it is possible to suppress the member that the brush holding part 41 contacts from being damaged or damaged. At this time, the brush 31 is also accompanied by the brush holding portion 41 and moves toward the inside of the accommodation substrate 42 in the radial direction. At this time, since the brush retracting portion 422 is formed on the accommodation substrate 42, it is possible to prevent the brush 31 from being sandwiched between the brush holding portion 41 and the accommodation substrate 42.

  Further, when the rotating unit 2 is rotating, the brush guide 4 is also rotated. That is, even if the brush holding portion 41 is accommodated inside the accommodation substrate 42, the brush rotation driving device A is rotationally driven, so that the brush holding portion 41 moves to the outside of the accommodation substrate 42 by centrifugal force. At this time, the brush 31 that has been moved together with the brush holding portion 41 also moves, so that the brush 31 returns to the original position. In this way, even when the brush rotation driving device A is being rotationally driven, even if the brush holding portion 41 comes into contact with an external member and moves to the inside of the accommodation substrate 42, it returns to the original position by centrifugal force. Thereby, the front-end | tip of the brush 31 can be made to contact | abut at a fixed angle with respect to the outer surface of a processing object.

  The brush 31 may be worn when the surface treatment operation is performed. When the brush is worn, the brush 31 protruding in the axial direction from the brush holding portion 41 is shortened. When the protruding amount in the axial direction of the brush 31 is shortened, the brush holding portion 41 is likely to come into contact with the surface of the processing object, and the protruding amount adjusting member 43 is likely to come into contact with the surface of the processing object. In order to prevent such members other than the brush 31 from coming into contact with the object to be processed, when the brush 31 is worn over a certain amount, the position of the brush guide 4 is brought closer to the rotating unit 3 and the brush holding unit 41 The brush 31 protrudes a certain length in the axial direction.

  If the brush guide 4 is moved closer to the rotating portion 3 while the amount of protrusion of the brush holding portion 41 from the receiving substrate 42 is left as it is, the angle of the brush unit 3 with respect to the central axis of the brush guide mounting portion 26 increases. When the contact angle of the brush 31 with the surface of the object to be processed is changed, the processing effect is reduced, or the brush 31 is likely to be bent. For this reason, when the brush guide 4 is moved, it is necessary to keep the contact angle of the brush unit 3 with the surface of the processing object within a certain range.

  Therefore, in the brush guide 4, when the brush guide 4 is moved closer to and away from the rotating unit 3, the amount of protrusion of the brush holding unit 41 protruding from the accommodation substrate 42 is adjusted, so that the surface of the object to be processed of the brush 31 can be adjusted. The contact angle is adjusted appropriately. Adjustment of the protrusion amount of the brush holding part 41 is as follows. The tightening screw 48 and the rotation prevention screw 49 are loosened so that the protrusion amount adjusting member 43 can be rotated. By rotating the protrusion amount adjusting member 43 and appropriately adjusting the position of the adjustment hole 432, the movable range of the pin 413 is adjusted, and the position of the brush holding portion 41 is adjusted.

  And after adjusting the protrusion amount adjustment member 43, the rotation prevention screw 49 and the clamping screw 48 are fixed. Thereby, even if the position of the brush guide 4 is adjusted, it is possible to appropriately adjust the contact angle of the brush 31 with the surface of the processing object. In addition, in order to adjust the protrusion amount of the front-end | tip of the brush 31 appropriately, you may provide the confirmation part which can confirm the movement amount of the protrusion amount adjustment member 43. FIG. Regardless of the length of the brush 31, the amount of protrusion at the tip can be made constant by the amount of protrusion of the mounting screw 44.

  When the brush rotation driving device A is driven and the brush 31 is brought into contact with the surface of the processing object, the brush holder 41 receives most of the force received by the brush 31 from the surface of the processing object. At this time, a force from the surface of the processing object acts on the tip of the brush 31, and a support reaction force acts on the brush 31 from the brush holding portion 41 that is slightly apart. By holding the brush 31 with the brush holding portion 41, the force acting on the brush 31 can be stored in a short region of the brush tip. By attaching the brush guide 4, it is possible to reduce the amount of deflection at the tip of the brush 31, and it is possible to produce an effect that it is difficult for the brush 31 to be bent.

  Next, the power unit 6 that rotationally drives the rotating unit 2 will be described. The power unit 6 includes a motor 61, a rotational force switching unit 62, a first pulley 63, and a second pulley 64. Here, as the motor 61, a power source capable of outputting a rotational force (axial force) such as an electric motor or a pneumatic motor can be widely used.

  The rotational force switching unit 62 transmits the rotational force output by the motor 61 to a rotational shaft orthogonal to the output shaft of the motor 61. In addition, although the structure which combined the bevel gear can be mentioned as the rotational force switching part 62, for example, it is not limited to this. Further, the rotational force switching unit 62 may include a speed reducer for reducing the rotational speed of the motor 61 and increasing the torque. And the 1st pulley 63 and the 2nd pulley 64 are being fixed to the output shaft of the rotational force switching part 62 at fixed intervals.

  A first belt 51 is wound around the first pulley 63. A second belt 52 is wound around the second pulley 64. The first belt 51 is wound around the first pulley 63 and the belt hooking portion 214 of the first rotating member 21. Further, the second belt 52 is wound around the second pulley 64 and the belt hooking portion 224 of the second rotating member 22. Thus, the rotational force of the motor 61 is transmitted to the first rotating member 21 and the second rotating member 22 by the power transmission unit 5 including the first belt 51 and the second belt 52. By rotating the rotating unit 2, the first rotating member 21 and the second rotating member 22 are synchronized and rotated independently of each other.

  The rotation operation of the brush rotation driving device A configured as described above will be described. As shown in FIG. 11A, in the brush rotation driving device A, the eccentric member 23 is coupled so as to be rotatable at an eccentric position of the support member 25. The support member 25 is rotated by the rotation of the eccentric member 23. Further, the eccentric member 23 is pushed by the eccentric pin 27 and rotates (revolves) around the rotation support shaft 24 in a state where the center O2 keeps a constant distance (eccentric) with respect to the center O1 of the rotation support shaft 24. And rotates (rotates) around the center O2. By such rotation of the eccentric member 23, the support member 25 rotates.

  The support member 25 is attached to the first rotating member 21, and the eccentric member 23 is attached to the support member 25. The eccentric pin 27 is attached to the second rotating member 22. Since the first rotating member 21 and the second rotating member 22 are rotated by the first pulley 63 and the second pulley 64 respectively attached to the output shaft of the rotational force switching unit 62 of the power unit 6, Rotate in the same direction as seen from the top.

  That is, as shown in FIG. 11A, when viewed from the center of the rotation support shaft 24, the first rotating member 21 rotates at the number of rotations S1 in the direction of the arrow A1, and the second rotating member 22 (here, the eccentric pin 27) also It rotates at the number of rotations S2 in the arrow direction which is the same direction. The rotation speed ratio S1 / S2 = 30/29. That is, when the first rotating member 21 rotates 30 times, the second rotating member 22 rotates 29 times. The first rotating member 21 and the second rotating member 22 are rotated by a first pulley 63 and a second pulley 64 attached to the output shaft of the rotational force switching unit 62, respectively. Therefore, the rotation speed S1 is determined by the ratio between the belt hooking portion 214 and the first pulley 63. The rotational speed S2 is similarly determined by the ratio between the belt hooking portion 224 and the second pulley 64. Details of these ratios will be described later.

  As described above, the first rotating member 21 rotates clockwise around the central axis 24 when viewed from above (see FIG. 11A). On the other hand, the eccentric pin 27 attached to the second rotating member 22 similarly rotates clockwise (A1 direction) around the central axis 24 when viewed from above (see FIG. 11A). Since the rotation speed of the eccentric pin 27 is slower than the rotation speed of the first rotation member 21, the eccentric pin 27 increases the relative speed of the rotation speed S3 counterclockwise with respect to the first rotation member 21 (B1 direction in FIG. 11B). (See FIG. 11B). In addition, since the ratio S1 / S2 = 30/29 of the rotation speed of the first rotation member 21 and the second rotation member 22, the ratio S3 / S1 = 1 / of the relative rotation speed of the first rotation member 21 and the eccentric pin 27. 30. That is, while the first rotating member 21 rotates 30 times, the eccentric pin 27 relatively rotates once in the opposite direction.

  When the eccentric pin 27 rotates relative to the first rotating member 21, the passive ring 232 is pushed by the eccentric pin 27. Since the drive ring 231 is attached to the eccentric position of the four support members 25, the drive ring 231 rotates clockwise around the center O2 (in the direction of the arrow C1 in the figure) and the first rotating member around the center O1. Revolves counterclockwise with respect to 21 (in the direction of arrow C2 in the figure).

  The eccentric member 23 rotates clockwise around the center O2 (C1 direction in the figure) and relatively revolves counterclockwise (C2 direction in the figure) around the center O1, thereby rotating each support member 25 in the rotational direction. All the support members 25 can be rotated counterclockwise (D1 direction in the figure) (FIG. 11C). As described above, the first rotating member 21 and the second rotating member 22 rotate at different speeds so that the support member 25 and the brush 31 connected to the support member 25 revolve around the rotation support shaft 24 and rotate. It is possible to make it.

  The eccentric member 23 makes one rotation both in rotation and revolution because the eccentric pin 27 makes one rotation relative to the first rotation member 21. When the eccentric member 23 rotates once for both rotation and revolution, the support member 25 (and the brush 31 connected to the support member 25) rotates once. That is, the rotation speed of the support member 25 is the same as the relative rotation speed S3 of the eccentric pin 27 with respect to the first rotation member 21.

  In addition, the rotation speed at which the brush 31 connected to the support member 25 revolves is the same as the rotation speed S <b> 1 of the first rotation member 21. Therefore, the ratio of the rotation speed of the brush 31 to the rotation speed of the revolution is the same as the ratio of the relative rotation speed S3 of the eccentric pin 27 to the first rotation member 21 and the rotation speed S1 of the first rotation member 21. become. That is, the rotation speed ratio between the rotation and revolution of the brush 31 is as follows. Rotation / revolution = S3 / S1 = 1/30. That is, the brush 31 rotates once when it revolves 30 times.

  As described above, even if the rotation speed difference between the rotation speed of the first rotation member 21 and the rotation speed of the second rotation member 22 is small, the ratio between the revolution speed and the rotation speed can be increased. Is possible. For example, in order to generate such a rotation difference, for example, the outer diameter of the belt hooking portion 214 (first rotating member 21) is formed slightly larger than the outer diameter of the belt hooking portion 224 (second rotating member 22). Just do it. By adopting the brush rotation drive device A of the present invention, a large reduction ratio such as 1/30 can be obtained with a small configuration compared to a normal reduction gear (using a planetary gear mechanism or the like).

  The brush rotation driving device A according to the present invention revolves the plurality of brushes 31 while rotating, and performs surface treatment by rubbing the surface of the processing object with a brush. In this brush rotation drive device A, the inventor of the present application makes a wrinkle when the tip of the brush 31 is bent by setting the ratio of revolution and rotation of the brush 31 to about 30 (revolution / rotation). The knowledge that it can suppress is acquired. Therefore, in the above-described example, the ratio of revolution and rotation of the brush 31 (revolution / rotation) is described as 30, but this condition varies depending on the revolution speed, the material of the brush 31, and the like. It is not limited to the value. By changing the diameter of the first rotating member 21 and the outer diameter of the second rotating member 22, the ratio of the rotation speeds can be changed. Further, by adjusting the rotation speeds of the first rotation member 21 and the second rotation member 22, it is possible to adjust the rotation direction and the rotation speed of the support member 25.

  In the above description, the first pulley 63 and the second pulley 64 are described as having the same outer diameter, but the present invention is not limited to this. For example, when the belt hooking portion 214 of the first rotating member 21 is formed smaller than the belt hooking portion 224 of the second rotating member 22, the first pulley 63 is formed larger than the second pulley 64, thereby The length of 51 and the 2nd belt 52 can be made the same.

  Thereby, it is possible to use a belt having the same length without using a member such as a tension applicator (belt tensioner). In addition, the rotation speed of the 1st rotation member 21 becomes high, so that the 1st pulley 63 becomes large diameter and the belt hooking part 214 becomes small diameter. Similarly, the rotation speed of the second rotating member 22 increases as the second pulley 64 has a larger diameter and the belt hook portion 224 has a smaller diameter. Compared with the case where the pulleys have the same size, the difference in outer diameter between the first rotating member 21 and the second rotating member 22 can be reduced. Thereby, the outer diameter of the brush rotation driving device A can be reduced.

  When the surface treatment of the object to be treated is performed using the brush rotation driving device A, the rotational speed of the rotating unit 2 also varies depending on the article (coating, rust, oil, etc.) removed by the surface treatment. In the brush rotation driving device A, when the rotation speed of the rotating unit 2 is increased, the tension of the first belt 51 and the second belt 52 increases. Since the frame 1 supports the rotating part 2 simply by supporting the rotating support shaft 24 with the bearing part 13, when the tension of the first belt 51 and the second belt 52 increases, the central axis of the rotating part 2 (rotating The support shaft 24) may be bent. When the rotation support shaft 24 is bent, rotation blurring or the like occurs, and operability is deteriorated or stable rotation is not performed.

  Therefore, as shown in FIG. 12, the intermediate portion of the first rotating member 21 is pressed by a pressing roller 14 that is rotatably provided on the frame 1 to oppose the tension and suppress the deflection of the rotation support shaft 24. ing. By pushing the first rotating member 21 from the first belt 51 to the side opposite to the direction in which the tension acts, the shaking of the rotating portion 2 is suppressed. Thus, by suppressing the shake of the rotating part 2, it is possible to suppress a decrease in the efficiency of the surface treatment and a deterioration in operability.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to this content. The embodiments of the present invention can be variously modified without departing from the spirit of the invention.

A Brush rotation driving device 1 Frame 11 Tube-shaped portion 12 Mounting portion 13 Bearing portion 14 Pressing roller 2 Rotating portion 21 First rotating member 211 Disk portion 212 Side wall portion 213 Sliding guide portion 2131 Sliding concave hole 214 Belt hook portion 22 Second rotating member 221 Disk portion 222 Side wall portion 223 Bearing portion 224 Belt hook portion 23 Eccentric member 231 Drive ring 232 Passive ring 24 Rotating support shaft 25 Support member 26 Free holding portion 261 Support convex portion 3 Brush unit 31 Brush 32 Brush holder 33 Brush attachment portion 333 Spring 34 Retaining pin 35 Retaining member 36 Free fitting convex portion 37 Screw 4 Brush guide 41 Brush holding portion 42 Housing substrate 43 Projection amount adjusting member 44 Mounting screw 441 Retaining member 45 Guide shaft 46 Shaft support member 461 First 1 support plate 462 second support plate 47 pressing member 48 clamping screw 49 Anti-rotation screw 51 First belt 52 Second belt 6 Power unit 61 Motor 62 Rotation force switching unit 63 First pulley 64 Second pulley

Claims (9)

A plurality of brushes whose tip contacts the target surface and scrapes foreign matter from the target surface;
A plurality of freely holding portions for holding each brush rotatably and swingably;
A rotating member that rotates and supports the plurality of free holding portions rotatably;
An eccentric member rotatably connected to an eccentric position of each of the plurality of free holding portions;
An eccentric pin that rotates relative to the rotating member and presses the eccentric member to revolve and rotate the eccentric member at a position shifted from the center of the rotating member;
A brush guide that holds the tip side of each brush and is attached to the rotating member so that the axial distance can be adjusted;
The brush guide includes an accommodation substrate that accommodates the brush holding portion in a direction intersecting a central axis of revolution of the brush, and a protrusion amount adjustment portion that adjusts an amount of protrusion of the brush holding portion with respect to the accommodation substrate. A brush rotation driving device comprising:   2. The brush rotation according to claim 1, wherein the universal holding portion is provided so that a tip of the brush protrudes outside an axial projection surface of the rotating member by centrifugal force when the rotating member rotates. Drive device. The rotation member is provided to have the same central axis and has a sub-rotation member that rotates independently of the rotation member;
The brush rotation driving device according to claim 1 or 2, wherein the eccentric pin is rotatably attached to the auxiliary rotation member. The rotating member and the auxiliary rotating member have a cylindrical outer peripheral surface;
The outer peripheral surfaces of the rotating member and the sub-rotating member are each provided with a belt hook portion around which a belt for transmitting a rotational force is wound,
The brush rotation driving device according to claim 3, wherein an outer diameter of the belt hook portion of the rotating member is different from an outer diameter of the belt hook portion of the auxiliary rotating member.   The brush rotation driving device according to claim 4, wherein the belts wound around the respective belt hanging portions of the rotating member and the sub-rotating member are wound around different transmission members attached to a common power shaft.   The ratio of the outer diameter between the outer diameter of the rotating member and the transmitting member around which the belt transmitting the rotational force to the rotating member, the outer diameter of the auxiliary rotating member, and the belt transmitting the rotational force to the rotating member The brush rotation driving device according to claim 5, wherein the ratio of the outer diameter of the transmission member to which the belt is wound is determined so that the length of the belt to be wound is the same.   The brush rotation drive device according to any one of claims 4 to 6, further comprising a pressing roller that presses an outer peripheral surface of the rotating member so as to oppose a force acting on the rotating member by tension of the belt. The brush holding part is provided with a pin formed so as to protrude outward from the accommodating substrate,
The protrusion amount adjusting portion is rotatably attached to the accommodation substrate;
By having the pins of each brush holding portion inserted and rotated, the pin is held by the inner wall of the adjustment hole, and the adjustment hole is formed in a spiral shape to adjust the protruding amount of the brush holding portion. The brush rotation drive device according to any one of claims 1 to 7.   The brush rotation driving device according to claim 8, wherein the adjustment hole has a size such that the pin can move in a direction in which the brush holding portion is accommodated.

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