JP2858239B2 - Polishing jig cleaning equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polishing method for holding a plurality of ends of a ferrule fixed to an optical fiber on a polishing jig and polishing the same, and then cleaning the polishing powder attached to the polishing jig and the ferrule. The present invention relates to a jig cleaning device.

[0002]

2. Description of the Related Art In optical communication and the like, optical fibers are sometimes connected to each other via an optical connector. In this case, a ferrule made of, for example, zirconia is provided at an end of the optical fiber. . That is, it is necessary to insert the end of the optical fiber into the optical fiber insertion hole of the ferrule, fix it with an adhesive, and grind the end face of the ferrule.

FIG. 10 schematically shows a general optical fiber polishing machine, FIG. 11 schematically shows a polishing jig equipped with an optical fiber,
FIG. 12 schematically illustrates a conventional method for cleaning a polishing jig. In the polishing machine 101, a polishing disk 103 having a concave surface is rotatably mounted on a box-shaped main body 102, and a polishing sheet (not shown) is placed on the polishing disk 103. Further, the main body 102 has a movable body 105 supported by a lifting shaft 104 so as to be vertically movable.
A holder 10 holds a polishing jig 201 described later.
6 are attached. An operation panel 107 is provided on the front surface of the main body 102.

The polishing jig 201 has a hexagonal plate shape.
A circular mounting portion 202 is fixed on the upper surface. And
A ferrule 302 fixed to the end of the optical fiber 301 is held by a fixing jig 203 on the outer peripheral surface of the polishing jig 201, and the fixing jig 203 is fixed to the polishing jig 201 by bolts 204. .

Therefore, a plurality of ferrules 302 attached to the end of the optical fiber core 301 are
01 is fixedly held on an outer peripheral end face by a fixing jig 203. In this state, the mounting portion 202 of the polishing jig 201 is attached to the holding portion 106 of the polishing machine 101, and the polishing jig 201 is lowered together with the moving body 105, and the polishing plate 10 is driven to rotate.
The end face of the ferrule 302 is pressed against the polishing sheet 3. Then, the end face of the ferrule 302 is polished spherically together with the end face of the optical fiber.

When the end surface of the ferrule 302 is polished while being fixed to the polishing jig 201, the lower surface and the side surface of the ferrule 302 and the ferrule 30 are fixed.
Abrasive powder adheres to the end of No. 2 and the like. In this case, conventionally,
As shown in FIG. 12, the ferrule 302 is
The operator holds the cleaning brush 402 while turning the polishing jig 201 upside down and holding the water discharged from the faucet 401 at a predetermined location while holding the cleaning brush 402 fixed.
The polishing jig 201 and the end of the ferrule 302 were cleaned.

[0007]

However, in such a cleaning operation of the polishing jig 201, since the operator manually performs the cleaning operation with the cleaning brush 402, a long cleaning operation time is required. In addition, there is a problem that the burden on the worker is increased and the working efficiency is not good.

In some cases, instead of manual work using the cleaning brush 402, cleaning is performed using, for example, an ultrasonic cleaner. However, in this cleaning work, there is a problem that abrasive powder cannot be reliably removed. there were. An object of the present invention is to solve such a problem, and it is an object of the present invention to provide a cleaning device for a polishing jig capable of improving work efficiency and reliably removing polishing powder.

[0009]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides an optical fiber in which a plurality of ferrules fixed to an end of an optical fiber are held on an outer peripheral portion of a plate-shaped polishing jig. A polishing jig cleaning apparatus for cleaning the polishing powder adhered after polishing the end of the ferrule, a device main body for mounting and holding the polishing jig in a horizontal state, and the polishing device mounted on the device main body. A rotating body rotatably supported below the jig, rotating body driving means for rotating the rotating body, and a cleaning brush provided on an upper surface of the rotating body and in contact with a lower surface of the polishing jig. A part of the outer peripheral portion of the polishing jig is sequentially pushed up along the circumferential direction thereof by the action of the cleaning brush rotated by the rotation driving of the rotating body by the rotating body driving means, so as to be in an inclined state. Become the polishing jig The lower surface portion is in the cleaning apparatus of the polishing jig, characterized in that it is cleaned by the cleaning brush.

In this case, in order to clean the end of the optical fiber and the ferrule and the polishing powder adhering to the polishing jig after polishing the end of the optical fiber and the ferrule, the polishing jig is placed and held on the apparatus body. When the rotating body is rotated by the rotating body driving means while supplying the cleaning liquid to the polishing jig, the cleaning brush rotates and moves a part of the outer peripheral portion of the polishing jig along its circumferential direction. By sequentially pushing up and inclining to make random contact with the lower surface, the side surface, the end of the ferrule, etc., the cleaning is reliably performed.

Here, a cleaning liquid supply section is formed at an upper portion of the apparatus main body, and a cleaning liquid discharge section is formed at a lower portion. The cleaning liquid supply section and the cleaning liquid discharge section have cleaning liquid supply means. The cleaning liquid supply means supplies a predetermined amount of cleaning liquid into the apparatus main body from the cleaning liquid supply unit to sink the polishing jig into the cleaning liquid, and thereafter, the cleaning jig is discharged from the cleaning liquid discharge unit. The process of discharging the cleaning liquid may be performed intermittently.

In this case, the storage and discharge of the cleaning liquid such as water are intermittently and sequentially performed in the main body of the apparatus, so that the polishing powder attached to the polishing jig is reliably removed. In addition, compared with the case where the cleaning is performed while supplying the cleaning liquid from above, the usage amount of the cleaning liquid can be greatly reduced.

Further, an internal gear is fixed to the apparatus main body, and at least one first external gear that meshes with the internal gear is pivotally mounted on the rotating body, and the first external gear is At least one second external gear that meshes with at least one external gear is pivotally mounted, and the cleaning brush is attached to the first and second external gears, while rotating by rotating the rotating body by the rotating body driving means. By the action of the cleaning brush being moved, a part of the outer peripheral portion of the polishing jig is sequentially pushed up along its circumferential direction to be in an inclined state, and the lower surface portion of the polishing jig is cleaned by the cleaning brush. You may make it.

In this case, when the rotating body rotates, the external gears rotate in opposite directions, so that the cleaning brush contacts and cleans all the clean portions of the polishing jig while rotating and revolving. Then, the polishing powder attached to the polishing jig is reliably removed. Further, the arrangement state of the cleaning brush is as follows:
For example, overall imbalance and no more than two axes of symmetry.

Further, for example, the shapes of the cleaning brushes mounted on the first external gear and the second external gear are not identical. Also, for example, the density of bristles of the cleaning brushes mounted on the first external gear and the second external gear is not the same.

Also, for example, the lengths of the bristles of the cleaning brushes mounted on the first external gear and the second external gear are not the same. Further, the cleaning device of the polishing jig of the present invention is characterized in that the cleaning brush of the first external gear has a higher density of bristles than the cleaning brush of the second external gear.

In this case, a part of the outer peripheral portion of the polishing jig is pushed up by the cleaning brush which is rotated to be inclined, so that the cleaning brush contacts and cleans all the cleaning portions of the polishing jig. The polishing powder adhered to the polishing jig is reliably removed.

[0018]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a front view of a polishing jig cleaning apparatus according to an embodiment of the present invention, FIG. 2 is a schematic diagram of a polishing brush, FIGS. 3 and 4 show a process of cleaning the polishing jig, and FIG. 6 schematically shows the operation of the polishing jig in FIG. 6, and FIG. 6 schematically shows the arrangement of the polishing device and the cleaning device of the polishing jig.

As shown in FIG. 6, a polishing jig cleaning apparatus 11 of this embodiment is provided adjacent to a polishing apparatus 12, and a transfer apparatus for transferring a polishing jig 13 between them. 14
Is provided. The transfer device 14 has a support arm 16 that is vertically movable and horizontally rotatable on an elevating shaft 15, and can move while holding the polishing jig 13. Therefore, in the polishing apparatus 12, the ferrule of the optical fiber rotates while being held on the outer peripheral portion of the polishing jig, and the ends of the optical fiber and the ferrule are polished. Holds the polishing jig 13 and transfers it to the cleaning device 11. The cleaning device 11 cleans the polishing powder adhering to the optical fiber, the end of the ferrule, and the polishing jig 13.

As shown in FIG. 1, a polishing jig cleaning apparatus 1
In FIG. 1, when a cleaning liquid supply unit 22 is formed in an upper part of a cylindrical apparatus main body 21, a cleaning liquid discharge unit 2 is formed in a lower part.
3 is formed, and a flange portion 24 for placing and holding the polishing jig 13 in a horizontal state is formed at an intermediate portion thereof. For example, a supply pump (not shown) is connected to the clean liquid supply unit 22 as clean liquid supply means, and a discharge pipe (not shown) is connected to the clean liquid discharge unit. In addition,
The polishing jig 13 has a plate shape, and has a ferrule 02 attached to an end of a plurality of optical fiber cores 01 on an outer peripheral portion.
Is held.

A rotatable body 25 is rotatably supported at a lower portion in the apparatus main body 21. The rotatable body 25 is driven by a driving shaft 27 of a driving motor 26 as a rotatable body driving means. It is rotatable. An annular internal gear 28 is fixed to the apparatus body 21 below the flange portion 24, while a first external gear 29 meshing with the internal gear 28 is pivotally mounted on the rotating body 25. The second external gear 3 which is worn and meshes with the first external gear 29
0 is pivotally mounted, and a third external gear 31 that meshes with the internal gear 28 is pivotally mounted. These external gears 29, 3
As shown in detail in FIG. 2, the reference numerals 0 and 31 are arranged substantially in a straight line along the radial direction of the rotating body 25, but are not arranged at equal intervals along the linear direction. The cleaning brushes 32, 33, 34 are fixed to the upper surface, respectively. In this case, the density of bristles of each of the cleaning brushes 32, 33, 34 is almost the same.

Accordingly, when the driving motor 26 is driven to rotate the rotating body 25 in the direction of the arrow in FIG.
Also, the first and third external gears 29 and 31 rotate in the direction of the arrow while engaging with the internal gear 28, and the second external gear 30 moves in the second direction. While rotating with the first external gear 29 in the direction of the arrow, the cleaning brushes 32, 33, and 34 can revolve while rotating.

Here, the cleaning operation of the end of the ferrule 02 and the polishing jig 13 by the cleaning device 11 will be described. As described above, when the polishing operation of the end of the ferrule 02 of the optical fiber 01 fixed to the polishing jig 13 is completed, the polishing jig 13 is transferred from the polishing device 12 to the cleaning device 11 by the transfer device 14. Is done. In this cleaning device 11, as shown in FIG. 1, a polishing jig 13 to which a number of ferrules 02 of an optical fiber core 01 are fixed is placed and held on a flange portion 24 of an apparatus main body 21 in a horizontal state. In this state, as shown in FIG. 3, for example, water is supplied as a cleaning liquid from the cleaning liquid supply unit 22 to the polishing jig 13 by the supply pump, and the cleaning liquid is stored in the apparatus main body 21. On the other hand, the driving motor 26 is driven to rotate the rotating body 25, and the cleaning brushes 32, 33, and 34 are revolved along with the external gears 29, 30, 31 while rotating.

Then, due to the imbalance in the arrangement of the cleaning brushes 32, 33, and 34, the cleaning brushes 32, 33 that rotate and move.
Due to the action of 33, 34, a part of the outer peripheral portion of the polishing jig 13 is sequentially pushed up in the circumferential direction, and the polishing jig 13 is always inclined in any direction as shown in FIG. The rocking motion is repeated up and down as follows.
Accordingly, each of the cleaning brushes 32, 33, and 34 is randomly arranged on the lower surface and the side surface of the polishing jig 13 whose outer peripheral portion swings up and down, the inside of the central hole, or the entire peripheral surface of the end portion of the ferrule 02. As a result, the abrasive powder is reliably removed over the entire area where the abrasive powder adheres.

With the cleaning operation of the polishing jig 13 by the cleaning brushes 32, 33, and 34, the cleaning liquid is supplied from the cleaning liquid supply unit 22 into the apparatus main body 21 as described above. When a predetermined amount of the cleaning liquid is stored in the apparatus body 21 and the polishing jig 13 is immersed in the cleaning liquid,
The supply of the cleaning liquid from the cleaning liquid supply unit 22 is stopped, and the cleaning liquid is discharged from the cleaning liquid discharge unit 23 as shown in FIG.
When a predetermined amount of the cleaning liquid in the apparatus main body 21 is discharged, for example, after a certain period of time or immediately, the cleaning liquid is supplied again from the cleaning liquid supply unit 22 into the apparatus main body 21 to immerse the polishing jig 13. I do. Therefore, in the apparatus main body 21,
A clean cleaning liquid is intermittently supplied, and the polishing powder removed from the polishing jig 13 is reliably discharged to the outside of the apparatus main body 21 and does not adhere again.

As described above, in the apparatus main body 21, the storage and the discharge by the supply of the cleaning liquid are intermittently repeated repeatedly. For example, the cleaning liquid may be continuously applied to the polishing jig 13. However, when the polishing jig 13 is intermittently immersed in the cleaning liquid as in this embodiment, the polishing powder can be reliably removed with a significantly smaller amount of the cleaning liquid as compared with the method of continuously flowing the cleaning liquid. Can be removed. In the apparatus of the present embodiment, all of the predetermined portions of the polishing jig 13 are cleaned by the intermittent injection of the cleaning liquid and the revolving and rotating cleaning brushes 32, 33, and 34 as described above. The polishing powder attached to the polishing jig 13 and the like is reliably removed.

In the embodiment described above, the configuration of the cleaning brushes 32, 33, 34 of the rotating body 25 is not limited to this configuration. For example, by making the arrangement or shape of the plurality of cleaning brushes non-uniform, a part of the outer peripheral portion of the polishing jig 13 is sequentially pushed up in the circumferential direction, and the polishing jig 13 is always inclined in any direction. In order to be in the state, the entire arrangement of the plurality of cleaning brushes should not have two or more axes of line symmetry.

Also, for example, the cleaning brush 33 is higher than the cleaning brush 32, and the cleaning brush 34 is higher than the cleaning brush 33, so that the density of bristles of each brush is not uniform. Often, in this case, the arrangement of each cleaning brush need not be uneven.

Further, for example, the bristle length of each cleaning brush may be made non-uniform, and in this case, the arrangement of each cleaning brush may not be non-uniform. The number of cleaning brushes is preferably at least three.
At least one can be sufficiently cleaned.

FIG. 7 shows an example in which there are two cleaning brushes. In this case, the arrangement has one axis of line symmetry, but by making the shape of both cleaning brushes rectangular so that their longitudinal axes are orthogonal to each other, the entire polishing jig can be surely secured. It is made to be able to clean.

That is, in the apparatus shown in FIG. 7, the internal gear 41 is fixed to a device body (not shown),
A rotary body 42 is rotatably supported concentrically with the internal gear 41. A first external gear 43 meshing with the internal gear 41 is pivotally mounted on the rotary body 42, and the first external gear 43 is pivotally connected to the first external gear 43. A second external gear 44 meshing with the tooth gear 43 is pivotally mounted. Then, rectangular cleaning brushes 45 and 46 are fixed to the upper surface portions of the external gears 43 and 44, respectively, such that their longitudinal axes are orthogonal to each other.

Therefore, when the rotating body 42 is rotated in the direction of the arrow in FIG.
The cleaning brushes 43 and 44 also rotate while rotating in the direction of the arrow while engaging with the internal gear 42 while rotating in the same direction. For this reason, the cleaning brushes 43 and 44 push up the outer periphery of the polishing jig (not shown) and swing up and down, and come into random contact with the lower surface and side surfaces of the polishing jig, so that the polishing powder adheres to the polishing jig. This polishing powder is removed over the entire area.

FIG. 8 shows another example having two cleaning brushes. In this case, the shape of each brush is circular and identical, but the arrangement is non-uniform with no axis of symmetry.
8, an internal gear 51 is fixed to a device body (not shown), and a rotating body 52 is rotatably supported concentrically with the internal gear 51. A first external gear 53 and a second external gear 54 meshing with the internal gear 51 are pivotally mounted, and a third external gear 55 meshing with the second external gear 54 is pivotally mounted. Cleaning brushes 56 and 57 are fixed to the upper surfaces of the external gears 53 and 55, respectively.

Therefore, when the rotating body 52 is rotated in the direction of the arrow in FIG.
The first and second external gears 53 and 54 rotate in the direction of the arrow while meshing with the internal gear 52, and revolve in the same direction. Rotates in the direction of the arrow while meshing with the second external gear 54, and the cleaning brushes 56 and 57 revolve while rotating. Therefore, each of the cleaning brushes 56, 57
While pushing up the outer periphery of the polishing jig (not shown) and swinging it up and down, the polishing jig comes into random contact with the lower surface and side surfaces of the polishing jig, and the polishing powder is removed over the entire area where the polishing powder adheres. Will be

In the example shown in FIG. 9, the arrangement and the shape of each cleaning brush have many axisymmetric axes. However, by making the generation density of the brushes non-uniform, the entire polishing jig can be secured. It is made to be able to clean. In the apparatus shown in FIG. 9, an internal gear 61
Are fixed, and a rotating body 62 is rotatably supported concentrically with the internal gear 61. The rotating body 62 has a first external gear 63 and a second external gear that mesh with the internal gear 61. The gear 64 and the third external gear 65 are pivotally connected, and the fourth external gear 66 meshes with each of the external gears 63, 64, 65.
, The fifth external gear 67 and the sixth external gear 68 are pivotally connected. The fourth, fifth, and sixth external gears 66, 6
Cleaning brushes 69, 70, 7 on the upper surface of
1 are respectively fixed. Here, the cleaning brush 69
And 71, the generation density of the bristles of the cleaning brush 70 is made smaller.

Therefore, when the rotating body 62 is rotated in the direction of the arrow in FIG. 9 by a drive motor (not shown), the first, second, and third external gears 63, 64, and 65 also move in the same direction to revolve and move inward. It rotates in the direction of the arrow while meshing with the tooth gear 62, and the fourth, fifth, and sixth external gears 66, 6
7, 68 are first, second, and third external gears 63, 64, 65.
And the cleaning brushes 69, 70, 71 revolve while rotating. Here, since the cleaning brushes 69, 70, and 71 are non-uniform as a whole due to the difference in the density of the bristles of the brushes, the cleaning brushes 69, 70, and 71 are located around the outer periphery of a polishing jig (not shown). While being raised and swung up and down, the polishing jig comes into random contact with the lower surface and side surfaces of the polishing jig, and the polishing powder is removed over the entire area where the polishing powder adheres.

As shown in the above embodiments, the cleaning brush is rotated and moved by making the arrangement and the shape of the cleaning brush nonuniform, making the density of the hair nonuniform, and making the length of the hair nonuniform. In this case, a part of the outer peripheral portion of the polishing jig can be sequentially pushed up in the circumferential direction, and the cleaning can be performed while repeatedly swinging the polishing jig up and down in an inclined state.

[0038]

As described above in detail in the embodiment, according to the apparatus for cleaning a polishing jig of the present invention, an apparatus for placing and holding a polishing jig to which a ferrule of an optical fiber is fixed in a horizontal state. A main body is provided, and the rotating body is rotatably supported by the rotating body driving means positioned below the polishing jig in the apparatus body, and a cleaning brush contacting the lower surface of the polishing jig is provided on the upper surface of the rotating body. The cleaning brush is provided to supply a cleaning liquid to the polishing jig held by the apparatus body and to sequentially push up a part of the outer peripheral portion of the polishing jig along its circumferential direction when the rotating body rotates. The cleaning jig is always tilted for cleaning, so the cleaning brush comes in random contact with the lower and side surfaces of the polishing jig, whose outer periphery swings up and down, and the end of the ferrule. , Attached part of abrasive powder Can make removal of the abrasive powder reliably over the entire area, it is possible to improve the work efficiency.

Further, according to the polishing jig cleaning apparatus of the present invention, the cleaning liquid supply means supplies a predetermined amount of the cleaning liquid from the cleaning liquid supply section into the apparatus main body, and then stops the supply of the cleaning liquid. The cleaning jig is cleaned by supplying the cleaning liquid in a blood donation manner, such as discharging the cleaning liquid from the cleaning liquid discharge section, so that the cleaning liquid is always supplied and discharged. As a result, the amount of cleaning liquid used is significantly reduced, and the polishing jig is always cleaned with a clean cleaning liquid, and the removed abrasive powder is reliably discharged to the outside to prevent re-attachment to the polishing jig. be able to.

[Brief description of the drawings]

FIG. 1 is a front view of an apparatus for cleaning a polishing jig according to an embodiment of the present invention.

FIG. 2 is a schematic view of a polishing brush.

FIG. 3 is a process chart showing a cleaning operation of the polishing jig.

FIG. 4 is a process diagram showing a cleaning operation of the polishing jig.

FIG. 5 is a schematic view showing the operation of a polishing jig in a cleaning operation.

FIG. 6 is a schematic view of an arrangement of a polishing device and a cleaning device of a polishing jig.

FIG. 7 is a configuration diagram of another cleaning brush.

FIG. 8 is a configuration diagram of another cleaning brush.

FIG. 9 is a configuration diagram of another cleaning brush.

FIG. 10 is a schematic view of a general optical fiber polishing machine.

FIG. 11 is a schematic view of a polishing jig on which an optical fiber is mounted.

FIG. 12 is a schematic view for explaining a conventional method for cleaning a polishing jig.

[Explanation of symbols]

 REFERENCE SIGNS LIST 01 Optical fiber core wire 02 Ferrule 11 Cleaning device 12 Polishing device 13 Polishing jig 21 Device body 22 Cleaning liquid supply unit 23 Cleaning liquid discharge unit 24 Flange unit 25 Rotating body 26 Drive motor (rotation drive unit) 28 Internal gear 29 1 external gear 30 second external gear 31 third external gear 32, 33, 34 cleaning brush 41 internal gear 42 rotating body 43, 44 external gear 45, 46 cleaning brush 51 internal gear 52 rotating body 53, 54, 55 External gear 56, 57 Cleaning brush 61 Internal gear 62 Rotating body 63, 64, 65, 66, 67, 68 External gear 69, 70, 71 Cleaning brush

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-62-166960 (JP, A) JP-A-62-203746 (JP, A) Actually open JP-A-63-41456 (JP, U) (58) Field (Int.Cl. ⁶ , DB name) B24B 55/12 G02B 6/36

Claims (7)

(57) [Claims] 1. A ferrule fixed to an end of an optical fiber.
A plurality of polishing jigs are held in a polishing jig, and in a polishing jig cleaning apparatus for cleaning polishing powder adhering after polishing the ends of the optical fiber and the ferrule, the polishing jig is placed in a horizontal state. An apparatus body for holding, a rotating body rotatably supported below the polishing jig placed on the apparatus body, rotating body driving means for rotating the rotating body, and an upper surface of the rotating body. A cleaning brush provided in contact with the lower surface of the polishing jig, and an outer peripheral portion of the polishing jig is formed by the action of the cleaning brush rotated by the rotation driving of the rotating body by the rotating body driving means. A cleaning device for a polishing jig, wherein a part of the polishing jig is sequentially pushed up in a circumferential direction to be in an inclined state, and a lower surface of the polishing jig is cleaned by the cleaning brush. 2. The apparatus according to claim 1, wherein a cleaning liquid supply section is formed at an upper portion of the apparatus main body, and a cleaning liquid discharge section is formed at a lower portion. A cleaning liquid supply unit is connected, the cleaning liquid supply unit supplies a predetermined amount of a cleaning liquid from the cleaning liquid supply unit into the apparatus main body, submerges the polishing jig in the cleaning liquid, and then sets the cleaning liquid A cleaning device for a polishing jig, wherein a process of discharging the cleaning liquid from a discharge unit is performed intermittently. 3. The device according to claim 1, wherein an internal gear is fixed to the apparatus main body, and at least one first external gear that meshes with the internal gear is pivotally attached to the rotating body. At least one second external gear that meshes with at least one of the first external gears is pivotally mounted, and the cleaning brush is mounted on the first and second external gears, and the rotating body is driven by the rotating body driving means. Due to the action of the cleaning brush, which is rotated and rotated by the rotation of the polishing jig, a part of the outer peripheral portion of the polishing jig is sequentially pushed up along the circumferential direction to be in an inclined state, and the lower surface portion of the polishing jig is inclined. Cleaning apparatus for cleaning a polishing jig, wherein the cleaning brush is cleaned by the cleaning brush. 4. A polishing jig cleaning apparatus according to claim 1, wherein the cleaning brushes are imbalanced as a whole and have no more than two axes of line symmetry. 5. The polishing jig according to claim 1, wherein the shape of each of the cleaning brushes mounted on the first external gear and the second external gear is not the same. Cleaning equipment. 6. The cleaning brush according to claim 1, wherein the density of bristles of each of the cleaning brushes mounted on the first external gear and the second external gear is not the same. Also a polishing jig cleaning device. 7. The cleaning brush according to claim 1, wherein the lengths of the bristles of the cleaning brushes mounted on the first external gear and the second external gear are not the same. Polishing jig cleaning equipment.