JP2007202354A - Varnish treating device and method therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a varnish treating device and its method by which the sticking of varnish to inner peripheral sides of a stator core and a coil portion is prevented, and a stator is surely fixed to a rotating shaft. <P>SOLUTION: The varnish treating device 1 includes an elastic body 12, having a nearly columnar side face portion 12b, a rotating shaft 13 which is provided at a position, including a center of the side face portion 12b of the elastic body 12, a pump 19 which pressurizes fluid and supplies to hollow space in order to pressurize the hollow space divided from the outside by the side face portion 12b of the elastic body 12, and varnish dropping nozzles 2, 3 to supply the varnish to a portion other than an inner face of the stator 30, of which inner face is held by the side face portion 12b of the elastic body 12, in a state where the hollow space is pressurized. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a varnish treatment apparatus and a method for impregnating a coil wound around a stator with varnish. More specifically, the present invention relates to a varnish processing device devised as a holding method for holding and rotating a stator from the inner peripheral side, and a method thereof.

  For example, in a stator of an electric motor or the like, after a coil is wound around a core, a varnish treatment is performed in which the varnish is impregnated and heat-cured to protect the coil. The varnish treatment device has a chuck device that fixes the inner peripheral side of the stator core to the rotating shaft, and drops liquid varnish onto each part of the coil while rotating the entire stator together with the rotating shaft. The varnish is dripped on the entire circumference of the stator by the rotation, and the varnish is transmitted to the inside of the coil by the surface tension, and the entire coil is impregnated with the varnish. The conventional chuck device has a plurality of advancing and retreating portions that advance and retreat in the radial direction around the rotating shaft, and the stator is fixed by fitting the stator in the retracted state and expanding each advancing and retreating portion to the outside. .

  Here, while the varnish needs to be impregnated in the entire coil, it is desired that the varnish does not adhere to the surface of the stator core other than the coil. This is because the varnish cured by adhering to the surface of the stator core may cause an obstacle when the stator is inserted into the case on the outer peripheral side, or may cause interference with the rotor on the inner peripheral side. In particular, in the conventional chuck device, in order for the advancing and retreating portions that perform the chucking function to advance and retreat, a gap is required between them, and adhesion of varnish to the inner peripheral side of the stator core cannot be prevented. For this reason, unnecessary varnish was removed after heat curing. However, it was difficult to scrape off the varnish adhering to the inner periphery of the stator core, and the scraping work was difficult.

On the other hand, Patent Document 1 discloses a manufacturing method in which adhesion of a varnish to the inner peripheral side of the stator is prevented by bringing a thin plate into close contact with the inner peripheral side of the stator core. According to the technique described in this document, a tin-made thin plate is placed on the inner peripheral side of the stator core, and a donut-shaped hollow body is arranged on the inner peripheral side to press-fit air. Thereby, the core and the thin plate are brought into close contact with each other, and varnish leakage from this portion is prevented.
JP-A-6-70516

  However, the conventional method described above has the following problems. In a laminated type stator core constructed by laminating electromagnetic steel sheets, the inner peripheral surface of the stator core is not necessarily a smooth surface. This is because the presence of minute misalignment between the steel plates or slight irregularities between the steel plates is inevitable. For this reason, there is a problem that it is difficult to completely adhere a smooth thin plate. If there is a minute gap between the thin plate and the stator core, the varnish may be transmitted through the gap, which may increase adhesion.

  Furthermore, the rotor disposed on the inner peripheral side of the stator faces not only the stator core portion but also the coil portions that protrude from both ends in the axial direction. Therefore, it is not desirable that the varnish adhere to the inner peripheral side of the coil portion. However, heretofore there was no way to prevent the varnish from adhering to the inner periphery of the coil part.

  The present invention has been made to solve the problems of the above-described conventional varnish processing apparatus. That is, an object of the present invention is to provide a varnish processing apparatus and method for preventing the varnish from adhering to the inner peripheral side of the stator core and the coil portion and securely fixing the stator to the rotating shaft.

  The varnish processing apparatus of the present invention made for the purpose of solving this problem includes an elastic body having a cylindrical side surface, a pressurizing unit that pressurizes a hollow space partitioned from the outside by the cylindrical side surface of the elastic body, and a hollow space And a varnish supply section for supplying varnish to a portion other than the inner surface of the annular object whose inner surface is held by the cylindrical side surface portion of the elastic body in a state where is pressed.

  According to the varnish treatment apparatus of the present invention, the varnish treatment apparatus has an elastic body having a cylindrical side surface portion. And this elastic body expand | swells by the raise of an internal pressure, when the hollow space divided from the outside by the cylinder side part is pressurized by the pressurization part. Therefore, when the inner surface of the annular object such as the stator is arranged on the outer periphery of the cylindrical side surface portion and the elastic body is expanded, the cylindrical object side surface is held by the cylindrical side surface portion of the elastic body being pressed against the inner surface of the annular object. Is done. At this time, the inner surface of the annular object is covered with the cylindrical side surface portion, and therefore, even if the varnish is supplied in this state, the varnish does not adhere to the inner surface of the annular object. Thus, it is possible to prevent the varnish from adhering to the inner peripheral side of the stator core and the coil portion, and to securely fix the stator to the rotating shaft.

  Furthermore, in the present invention, it is desirable to have a rotating shaft to which the elastic body is attached, and the rotating shaft is provided at a position including the center of the cylindrical side surface portion of the elastic body. In this way, the elastic body and the annular object held by the elastic body are rotated together by the rotation of the rotating shaft. Therefore, the annular object is rotated with its inner surface covered.

  Furthermore, in the present invention, it is desirable that the pressurizing unit is a fluid supply unit that pressurizes and supplies a fluid to the hollow space of the elastic body. In this way, it is easy to make the hollow space of the elastic body have a predetermined pressure.

  Furthermore, in the present invention, the elastic body has a rotating shaft to which the elastic body is attached, the pressurizing section is a fluid supply section that pressurizes and supplies a fluid to the hollow space of the elastic body, and the rotating shaft is provided on the cylindrical side surface portion of the elastic body. It is desirable that a flow path that connects the hollow space of the elastic body and the fluid supply section is formed inside the center and at a position including the center. In this way, even if the elastic body is rotated, the hollow space of the elastic body and the fluid supply part are communicated with each other by the flow path.

  Furthermore, the present invention has a fixing member that is located outside the elastic body, is provided so as to surround the side surface of the rotating shaft, and is fixed with respect to the rotation of the rotating shaft. And a circumferential inner groove that faces the side surface of the rotating shaft is formed. One of the inlets and outlets of the rotating shaft channel opens into the hollow space of the elastic body, and the other inlet and outlet is a fixing member. It is desirable to open in the inner groove. In this way, the flow path of the rotating shaft and the inner groove of the fixed member are communicated regardless of the rotational position of the rotating shaft. Therefore, even if the elastic body is rotated, the hollow space of the elastic body and the fluid supply unit are communicated with each other through the flow path. Further, since the fixed member is fixed with respect to the rotation of the rotating shaft, the fluid supply unit communicated with the fixed member can also be fixed with respect to the rotation.

  Furthermore, in the present invention, the fluid supply unit may be a hollow cylinder formed inside the rotating shaft and a piston that moves in the hollow cylinder. In this way, the internal pressure of the hollow space can be changed by the movement of the piston.

  Furthermore, in the present invention, the pressurizing unit may be a pressing member that presses a portion other than the cylindrical side surface portion of the elastic body by moving the rotating shaft in the axial direction. If it does in this way, the internal pressure of hollow space can be changed by the press by a press member.

  Furthermore, in the present invention, it is desirable that at least the front surface of the cylindrical side surface portion of the elastic body is formed of one of the group consisting of fluorine-containing resin, fluorine-containing rubber, silicone resin, and silicone rubber. If it is such, the elastic body which has appropriate pressure resistance, heat resistance, and varnish releasability can be selected.

  The present invention also holds the annular object by pressing the hollow space partitioned from the outside by the cylindrical side part of the elastic body having the cylindrical side part, thereby bringing the cylindrical side part into close contact with the inner surface of the annular object, The present invention also extends to a varnish treatment method for supplying varnish to a portion other than the inner surface of the annular object held by the cylindrical side surface portion of the elastic body in a state where the hollow space is pressurized.

  Furthermore, in the varnish treatment method of the present invention, it is desirable to pressurize by pushing a fluid into the hollow space. Or you may pressurize by pressing locations other than the cylindrical side part in an elastic body.

  According to the varnish treatment apparatus and the method of the present invention, it is possible to prevent the varnish from adhering to the inner peripheral side of the stator core and the coil portion, and to securely fix the stator to the rotating shaft.

"First form"
Hereinafter, a first embodiment of the present invention will be described in detail with reference to the accompanying drawings. In this embodiment, the present invention is applied to a varnish treatment apparatus in which a stator having a coil attached to a core is impregnated with varnish.

  As shown in FIG. 1, the varnish processing apparatus 1 of this embodiment includes dropping nozzles 2 and 3, and a chuck apparatus 11 that holds a stator is provided below the nozzles 2 and 3. The chuck device 11 includes an elastic body 12, a rotary shaft 13, sealing plugs 14 and 15, a fixing portion 16, a fluid pipe 17, a fluid tank 18, a pump 19, a check valve 20, and an on-off valve 21. A rotating device 25 for rotating the chuck device 11 is also attached to the rotating shaft 13. The rotating device 25 may be a power source such as a motor, or may be a transmitted member that receives rotational driving from an external power source. In addition to this, the varnish treatment apparatus 1 is provided with a varnish supply unit that varnish is liquefied and supplied to the dropping nozzles 2 and 3, a heating unit that heats the varnish-impregnated stator and the like to cure the varnish, and the like. However, these are general ones and will not be described here.

  As shown in FIG. 1, the elastic body 12 is a substantially cylindrical member having a substantially cylindrical shape on its side surface and a hollow space formed inside thereof. A through-hole is provided at the center of the bottom surface portion 12a (left and right portions in the figure) at both ends in the axial direction. The rotary shaft 13 passes through the through hole, and is fixed to the outer periphery of the rotary shaft 13 in a sealed state by sealing plugs 14 and 15. The cylindrical side surface portion 12b is a portion pressed against the inner peripheral surface of the stator 30 serving as a workpiece, and its axial length (the length in the horizontal direction in the figure) is at least the axial length of the stator 30. That's it. The axial length of the stator 30 here is a length including the coil portion, and corresponds to the length of the portion into which the rotor is inserted.

  The rotating shaft 13 is a shaft member provided horizontally, and is rotated at a speed of about 17 rotations / minute by the rotating device 25 during varnish processing. Thereby, the side surface part 12b of the elastic body 12 is rotated centering | focusing on a cylindrical center axis | shaft. The sealing plugs 14 and 15 are rotated together with the elastic body 12. A flow path 22 is formed in the rotation shaft 13 in the axial direction. The flow path 22 is provided with an opening 22 a communicating with the hollow space of the elastic body 12 and an opening 22 b communicating with the fixing portion 16. The other parts are sealed.

  The fixed portion 16 is provided so as to surround the side surface of the rotating shaft 13 and is not rotated by the rotation of the rotating shaft 13. The rotating shaft 13 is configured to be able to rotate while sliding while passing through the fixed portion 16. An annular groove 23 is formed around the rotary shaft 13 on the inner surface of the fixed portion 16. The opening 22 b of the flow path 22 in the rotating shaft 13 is provided at a position communicating with the groove 23. Since the groove 23 is annular, the opening 22b can communicate with the groove 23 regardless of the rotational position of the rotary shaft 13. In addition, the fixing portion 16 is provided with an opening 23 a that allows the groove 23 and the fluid pipe 17 to communicate with each other. Accordingly, the fluid pipe 17 is always in communication with the hollow space of the elastic body 12 through the opening 23a, the groove 23, the opening 22b, the flow path 22, and the opening 22a.

  In addition, a fluid tank 18 is connected to the fluid pipe 17 via a pump 19 and a check valve 20. Accordingly, the fluid stored in the fluid tank 18 is supplied to the fluid pipe 17 by the pump 19 at a predetermined pressure. On the other hand, the backflow from the fluid pipe 17 to the pump 19 is prevented by the check valve 20. A portion including the fluid pipe 17, the fluid tank 18, the pump 19, and the check valve 20 corresponds to a fluid supply unit. The fluid pipe 17 is provided with a return path that does not pass through the pump 19 and the check valve 20, and is connected to the fluid tank 18 through the on-off valve 21. In addition, since the fixing | fixed part 16 is not rotated also at the time of a varnish process, the part to the opening 23a, such as the fluid pipe | tube 17, can use metal piping.

  Here, the fluid used in the present embodiment is preferably an incompressible fluid having a pressure resistance of 10 atm level and a heat resistance of 180 ° C. level, and having no fear of corrosion or alteration. For example, machine oil or the like is suitable. Further, the elastic body 12 preferably has a pressure resistance of 10 atm level and a heat resistance of 180 ° C. level, has no fear of deterioration due to the fluid, and has good releasability with respect to the varnish. For example, fluorine resin or rubber, silicon resin or rubber can be used. Fluorine resin is excellent in varnish releasability, and silicon resin is excellent in flexibility. The thickness of the elastic body 12 is preferably about 5 to 10 mm.

  It is the stator 30 that is attached to the varnish treatment apparatus 1 of the present embodiment and is subjected to varnish treatment. The stator 30 is obtained by winding a coil 32 around a stator core 31. As shown in FIG. 1, both ends of the coil 32 protrude from the stator core 31 in the axial direction (left and right in the figure). When functioning as a motor, a rotor is disposed on the inner periphery of the stator 30. Since the axial length of the rotor is substantially the same as the length to the end of the coil 32, in order to prevent interference with the rotor, not only the inner peripheral side of the stator core 31 but also the inner peripheral side of the coil 32. However, adhesion of varnish is not preferable. This embodiment is particularly suitable for the laminated steel plate type stator core 31.

  Next, in the varnish processing apparatus 1 of the present embodiment, two types of states of the chuck apparatus 11 (indicated by a solid line and a broken line in FIG. 2) will be described. As described above, the fluid tank 18 and the hollow space of the elastic body 12 communicate with each other via the fluid pipe 17 and the like. Therefore, the fluid stored in the fluid tank 18 can be introduced into the hollow space of the elastic body 12 by closing the on-off valve 21 and driving the pump 19. Therefore, the shape of the elastic body 12 can be changed depending on the amount of fluid introduced.

  The broken line in FIG. 2 shows a state in which the side surface portion 12 b of the elastic body 12 has a cylindrical shape having an outer diameter slightly smaller than the inner diameter of the stator 30. In this state, it is easy to fit or remove the stator 30 around the elastic body 12. Therefore, in this state, even if the stator 30 is fitted, the stator 30 is not chucked by the chuck device 11. This state is referred to as a pre-chuck state of the chuck device 11. At this time, it is preferable that air or the like does not remain in the hollow space of the elastic body 12.

  On the other hand, a solid line in FIG. 2 shows a state in which a fluid is further introduced into the hollow space of the elastic body 12 in the pre-chuck state by the pump 19. Thereby, a larger amount of fluid is sealed in the hollow space of the elastic body 12, and the elastic body 12 is slightly expanded by the pressure. At this time, since the sealing plugs 14 and 15 are fixed to the rotary shaft 13, as shown by a solid line in FIG. 2, the side surface portion 12 b of the elastic body 12 mainly expands in the radial direction. This state is referred to as a post chuck state of the chuck device 11.

  If a stator 30 as a work to be varnished is prepared, the stator 30 is fitted around the elastic body 12 in the pre-chuck state, and the post-chuck state is set, the inner surface of the stator 30 is formed by the side surface portion 12b of the elastic body 12. The circumferential side is pressed toward the outside in the radial direction. As shown in FIG. 1, the inner surface of the stator 30 is held by the chuck device 11 by the pressure of the fluid, and the stator 30 is chucked by the chuck device 11.

  At this time, since the elastic body 12 itself has elasticity, the side surface portion 12b is slightly deformed following the inner peripheral surface of the abutted stator 30. Therefore, as shown in FIG. 3, even the laminated type stator core 31 is almost in close contact with the inner peripheral surface of each steel plate. Therefore, there is no gap for the varnish to enter on the inner peripheral side of the stator 30, and adhesion of the varnish to the inner peripheral side of the stator 30 is prevented.

  Next, the varnish processing operation | movement by the varnish processing apparatus 1 of this form is demonstrated. The elastic body 12 is filled with a fluid and is held in a state before chucking except during use. The on-off valve 21 is closed. The workpiece is the stator 30 that has been inserted up to the molding stage after the coil 32 is inserted into the stator core 31. In the varnish treatment step, (1) chucking step, (2) varnish dropping step, (3) varnish curing step, and (4) chuck removing step are sequentially performed.

  First, (1) in the chucking process, the stator 30 is fitted into the chuck device 11 in the pre-chuck state, and the pump 19 is driven. The on-off valve 21 remains closed. As a result, the chuck device 11 is brought into a post chuck state. As a result, the stator 30 is fixed to the rotary shaft 13 of the varnish processing apparatus 1 and the entire inner surface side of the stator 30 up to the coil 32 portion is covered with the elastic body 12 of the chuck apparatus 11.

  Next, in the (2) varnish dropping step, the liquid varnish is dropped from the dropping nozzles 2 and 3 while rotating the rotating shaft 13 at a predetermined speed. As a result, the coil 32 of the stator 30 is impregnated with the varnish. Subsequently, in the (3) varnish curing step, the stator 30 impregnated with the varnish is heated to about 180 ° C. As a result, the varnish is cured. The steps (2) and (3) are the same as in the prior art.

  Next, (4) in the chuck removing step, the stator 30 impregnated with varnish and cured is removed from the chuck device 11. For this purpose, the on-off valve 21 is first opened. Thereby, the fluid held in the hollow space of the elastic body 12 flows out to the fluid tank 18 by the elastic force of the elastic body 12 and the pressure of the fluid itself. Then, as the fluid inside the hollow space of the elastic body 12 decreases, the internal pressure of the elastic body 12 decreases and contracts by its own elastic force, as shown by the broken line in FIG. As a result, the chuck device 11 returns to the pre-chuck state, so that the stator 30 can be removed.

  As described above in detail, according to the varnish processing apparatus 1 of the present embodiment, since the chuck apparatus 11 is provided, the stator 30 after chucking is fixed to the rotary shaft 13 and the inner peripheral surface of the stator 30 is Covered by the elastic body 12. Therefore, by dropping the varnish as it is, there is no possibility that the varnish adheres to the inner peripheral surface of the stator 30. As a result, the varnish treatment apparatus 1 prevents the varnish from adhering to the inner peripheral side of the stator core and the coil portion and securely fixes the stator to the rotating shaft.

"Second form"
Hereinafter, a second embodiment of the present invention will be described in detail with reference to the accompanying drawings. In this embodiment, the present invention is applied to a varnish treatment apparatus in which a stator having a coil attached to a core is impregnated with varnish.

  The varnish processing apparatus of this embodiment is different from that of the first embodiment only in the chuck device, and common members are denoted by common reference numerals and description thereof is omitted. As shown in FIG. 4, the chuck device 41 of this embodiment has an elastic body 12 and sealing plugs 14 and 15. The rotary shaft 42 has an axial flow path 43 formed therein, and a cylinder 44 provided at an axial end portion. The flow path 43 communicates with the inside of the cylinder 44. The channel 43 is also provided with an opening 43 a that communicates with the hollow space of the elastic body 12. In this embodiment, the cylinder 44 is rotated by the rotating device 25 together with the rotating shaft 42.

  Furthermore, in this embodiment, a piston 45 that slides inside the cylinder 44 and a pressing device 46 that moves the piston 45 in the left-right direction in the figure are provided. By this pressing device 46, the piston 45 reciprocates between a post-chuck position indicated by a solid line and a pre-chuck position indicated by a broken line in FIG. A predetermined amount of fluid is sealed in the hollow space of the elastic body 12, the flow path 43, and the cylinder 44 as a whole. And since the volume of the fluid in the cylinder 44 changes according to the position of the piston 45, the pressure of the whole fluid changes.

  In the chuck device 41 of this embodiment, when the piston 45 is in the pre-chuck position, the side surface portion 12b of the elastic body 12 is in the position indicated by the broken line in FIG. 4, and the chuck device 41 is in the pre-chuck state. When the piston 45 is in the post-chuck position, the side surface portion 12b of the elastic body 12 is in the position shown by the solid line in FIG. 4, and the chuck device 41 is in the post-chuck state. That is, the state before chucking and the state after chucking can be repeated by the movement of the piston 45 by the pressing device 46. Thereby, similarly to the chuck device 11 of the first embodiment, (1) a chucking process and (4) a chuck removing process can be performed.

  As described in detail above, the varnish treatment apparatus of this embodiment also prevents the varnish from adhering to the inner peripheral side of the stator core and the coil portion, and reliably attaches the stator to the rotating shaft, as in the first embodiment. Can be fixed.

"Third form"
Hereinafter, a third embodiment of the present invention will be described in detail with reference to the accompanying drawings. In this embodiment, the present invention is applied to a varnish treatment apparatus in which a stator having a coil attached to a core is impregnated with varnish.

  The varnish processing apparatus of this embodiment is different from that of the first embodiment only in the chuck device, and common members are denoted by common reference numerals and description thereof is omitted. As shown in FIG. 5, the chuck device 51 of this embodiment has an elastic body 12 and a sealing plug 15. The hollow space of the elastic body 12 is filled with a predetermined amount of fluid. The rotation shaft 52 is not provided with a flow path inside. The left side of the elastic body 12 in the figure is sealed with a movable plug 53. A movable member 54 is connected to the movable stopper 53.

  The movable plug 53 is slidable along the rotation shaft 52 in a state where the hollow space of the elastic body 12 is sealed. The moving member 54 is a pressing device such as a hydraulic cylinder, for example, and moves the movable plug 53 forward and backward along the rotating shaft 52. Thereby, since the volume of the hollow space of the elastic body 12 is changed, the internal pressure is also changed. The position indicated by the broken line in FIG. 5 is the pre-chuck state, and when the movable member 54 presses the movable plug 53 in the right direction in FIG. 5, the post-chuck state indicated by the solid line in FIG. At this time, since the moving member 54 presses the movable plug 53 in the axial direction, the elastic body 12 expands in the radial direction and can chuck the stator.

  Alternatively, the fixing portion for the rotating shaft 52 may be provided with another member for compressing the elastic body 12 as the sealing plugs 14 and 15 similar to those in the first and second embodiments. For example, chucking can also be performed by pressing an annular member inward against the bottom surface portions 12a, 12a on one side or both sides.

  As described in detail above, the varnish treatment apparatus of this embodiment also prevents the varnish from adhering to the inner peripheral side of the stator core and the coil portion, and reliably attaches the stator to the rotating shaft, as in the first embodiment. Can be fixed.

In addition, this form is only a mere illustration and does not limit this invention at all. Therefore, the present invention can naturally be improved and modified in various ways without departing from the gist thereof.
For example, the side surface portion 12b of the elastic body 12 may be slightly more elastic than the bottom surface portion 12a. For example, the bottom surface portion 12a may be formed thicker than the side surface portion 12b, or a reinforcing member may be provided on the side surface portion 12b. Further, the hollow space of the elastic body 12 is not necessarily hollow. For example, a sponge-like elastic body capable of circulating a fluid may be incorporated. Further, the material such as the elastic body 12 and the fluid is not limited to the above.

It is sectional drawing which shows the varnish processing apparatus which concerns on a 1st form. It is sectional drawing which shows operation | movement of the chuck | zipper apparatus of the varnish processing apparatus of a 1st form. It is sectional drawing which shows operation | movement of a chuck | zipper apparatus. It is sectional drawing which shows the chuck | zipper apparatus of the varnish processing apparatus of a 2nd form. It is sectional drawing which shows the chuck | zipper apparatus of the varnish processing apparatus of a 3rd form.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Varnish processing apparatus 2,3 Dripping nozzle 12 Elastic body 13,42,52 Rotating shaft 16 Fixed part 19 Pump 22,43 Flow path 23 Groove 44 Cylinder 45 Piston 54 Moving member

Claims (11)

An elastic body having a cylindrical side surface;
A pressurizing unit that pressurizes a hollow space partitioned from the outside by a cylindrical side surface of the elastic body;
A varnish treatment device comprising: a varnish supply unit for supplying varnish to a portion other than the inner surface of the annular object whose inner surface is held by the cylindrical side surface portion of the elastic body in a state where the hollow space is pressurized . In the varnish processing apparatus according to claim 1,
A rotating shaft for attaching the elastic body;
The varnish processing apparatus, wherein the rotation shaft is provided at a position including a center of a cylindrical side surface portion of the elastic body. In the varnish processing apparatus according to claim 1,
The varnish processing apparatus, wherein the pressurizing unit is a fluid supply unit that pressurizes and supplies a fluid to the hollow space of the elastic body. In the varnish processing apparatus according to claim 1,
A rotating shaft for attaching the elastic body;
The pressurizing unit is a fluid supply unit that pressurizes and supplies a fluid to the hollow space of the elastic body,
The rotation shaft is provided at a position including the center of the cylindrical side surface portion of the elastic body, and a flow path is formed in the inside thereof to communicate the hollow space of the elastic body with the fluid supply portion. A varnish treatment apparatus characterized by the above. In the varnish processing apparatus of Claim 4,
A fixing member that is located outside the elastic body, is provided so as to surround a side surface of the rotating shaft, and is fixed with respect to rotation of the rotating shaft;
The fixing member is formed with a circumferential inner groove that communicates with the fluid supply unit and faces the side surface of the rotating shaft,
The varnish processing device, wherein the flow path of the rotating shaft has one entrance opening in the hollow space of the elastic body, and the other entrance opening in the inner groove of the fixing member. 5. The varnish processing apparatus according to claim 4, wherein the fluid supply unit is
A hollow cylinder formed inside the rotating shaft;
A varnish treatment apparatus comprising: a piston that moves in the hollow cylinder. The varnish processing apparatus according to claim 2, wherein the pressurizing unit is
A varnish processing apparatus, which is a pressing member that presses a portion other than the cylindrical side surface portion of the elastic body by moving the rotating shaft in the axial direction. In the varnish processing apparatus according to claim 1,
A varnish treatment apparatus, wherein at least a front surface of a cylindrical side surface portion of the elastic body is formed of one of a group consisting of fluorine-containing resin, fluorine-containing rubber, silicone resin, and silicone rubber. By pressing the hollow space partitioned from the outside by the cylindrical side surface portion of the elastic body having the cylindrical side surface portion, the circular cylindrical object is held in close contact with the inner surface of the annular object,
A varnish treatment method comprising supplying varnish to a portion other than an inner surface of an annular object held by a cylindrical side surface portion of the elastic body in a state where a hollow space is pressurized. In the varnish processing method of Claim 9,
A varnish treatment method, wherein pressure is applied by pushing a fluid into the hollow space. In the varnish processing method of Claim 9,
The varnish processing method characterized by performing pressurization by pressing locations other than the cylindrical side surface part in the said elastic body.

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