JP2019072699A - Manufacturing method and manufacturing apparatus for coated rotary shaft - Google Patents

Abstract

To provide a manufacturing method and a manufacturing apparatus for manufacturing a coated rotary shaft in which unevenness on a coating film provided on an outer peripheral surface is minimized or reduced.SOLUTION: A manufacturing method related to this invention is configured to actuate, in the transfer process, a rotary shaft drive motor and a transfer roller drive motor so that a rotary shaft may rotate at a predetermined rotary shaft transfer speed, and a transfer roller may rotate at a predetermined transfer roller transfer speed, while to actuate, on the separation operation which makes the rotary shaft move from a transfer position to release the state of pressure contact with the transfer roller, the rotary shaft drive motor and the transfer roller drive motor so that the rotary shaft may increase speed relatively to the transfer roller.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a method and an apparatus for manufacturing a rotary shaft having a coating film on an outer peripheral surface.

  It has been proposed that, instead of plating the outer peripheral surface of a metal rotating shaft used in an image forming apparatus such as a printer or a facsimile, the outer peripheral surface of the rotating shaft is coated (see Patent Document 1 below) reference).

  Specifically, in Patent Document 1, a step of spraying a spray material such as epoxy-modified chlorinated polyolefin resin on the outer peripheral surface of a metal rotary shaft, and a step of applying a first paint such as a thermoplastic acrylic resin thereafter And a method of processing a surface of a metallic rotary shaft comprising:

  Although the processing method disclosed in Patent Document 1 can achieve cost reduction by eliminating the need for plating treatment, a spray agent is sprayed on the outer peripheral surface of the metal rotary shaft, and thereafter the metal rotary shaft is made of metal. Since the coating material is released toward the outer peripheral surface for coating, it is difficult to make the film thickness of the coating film uniform, and there is a problem that the coating film tends to be uneven.

  In particular, in the case where the metal rotary shaft is used as a conveyance roller of an image forming apparatus, the rotary shaft is supported rotatably around an axis by a bearing member. In such a case, If the coating film has irregularities, peeling of the coating film occurs at the portion supported by the bearing member, and the rotational stability of the rotating shaft is impaired, and the durability is deteriorated.

  Furthermore, since a spray is sprayed on the outer peripheral surface of the rotary shaft and the paint is discharged toward the outer peripheral surface, a considerable amount of spray and paint is not fixed to the outer peripheral surface of the rotary shaft and is wasted. There is also a problem.

  On the other hand, as a method of manufacturing a paper feed roller used in the image forming apparatus etc., a liquid paint, which is a conventional paint in which a filler such as ceramic is mixed with a paint such as epoxy resin, is sprayed The coating roller, which is controlled to rotate in synchronization with the movement of the outer peripheral surface of the rotating roller main body, is brought into contact with the roller main body instead of being coated, and is attached to the surface of the coating roller Manufacturing method including the steps of transferring the coating material to the outer peripheral surface of the roller body, and drying and curing the coating material on the roller body to form a coating film made of a coating resin layer on the outer peripheral surface of the roller body Has been proposed (see Patent Document 2 below).

  Compared with the method described in the patent document 1, the manufacturing method described in the patent document 2 makes the film thickness uniform of the coating film provided on the outer peripheral surface of the paper feed roller, and unevenness occurs in the coating film. This is useful in that it can prevent or reduce the amount of waste paint.

  Furthermore, in Patent Document 2, the coating thickness on the coating start portion and the coating end portion on the outer peripheral surface of the roller main body is thinner than the coating thickness on the middle portion between the coating start portion and the coating end portion. It is described that by coating the coating on the coating and coating the coating start portion and the coating end portion so as to overlap, it is possible to reduce the level difference of the coating film generated in the overlapping portion. By adjusting the width of the slit formed by the blade and the doctor blade to adjust the amount of paint on the surface of the application roller, and by adjusting the viscosity of the paint and the pressing force when the roller body abuts the application roller It describes that it can be set to the coating thickness.

However, according to the method described in Patent Document 2, it is difficult to adjust the coating film thickness with high accuracy.
In particular, the coating roller and the roller body are opposed to each other from a state in which the coating roller is brought into contact with the roller body and the paint on the coating roller is transferred to the roller body among the outer peripheral surfaces of the roller body. When they are separated from each other, a "liquid dripping phenomenon" caused by the surface tension of the paint occurs on the outer peripheral surface of the roller main body, and the coating film becomes uneven.

Japanese Patent Application Laid-Open No. 2002-079170 JP 2008-253882 A

The present invention has been made in view of such prior art, and is a method for producing a coated shaft having a coating film on the outer peripheral surface, wherein asperity is produced in the coating film as much as possible. An object of the present invention is to provide a method for manufacturing a coated rotary shaft that can be prevented or reduced.
The present invention is also a manufacturing apparatus for a coated shaft provided with a coating film on the outer peripheral surface, wherein the coated shaft is coated with the coated film shaft in a state where the unevenness of the coating film is prevented or reduced as much as possible. An object of the present invention is to provide a manufacturing apparatus that can be manufactured efficiently.

  According to the present invention, in order to achieve the above object, a rotary shaft rotationally driven about an axis by a rotary shaft drive motor is rotationally driven about an axial line by a transfer roller drive motor in a state where paint is supplied to the outer peripheral surface. In the transfer step, the paint on the transfer roller is transferred to the outer peripheral surface of the rotating shaft at a transfer position pressed in parallel to the transfer roller, and in the transferring step, the rotating shaft rotates at least one rotation around the axis. Moving the rotary shaft from the transfer position to a non-transfer position where pressure contact with the transfer roller is released, and in the transfer step, the rotary shaft has a predetermined rotational shaft transfer speed. Operating the rotary shaft drive motor and the transfer roller drive motor so that the transfer roller rotates at a predetermined transfer roller transfer speed. At the time of separation operation in which the rotation shaft is moved from the transfer position to release the pressure contact state with the transfer roller, the rotation shaft drive motor is driven so that the rotation shaft is accelerated relative to the transfer roller. And a method of manufacturing a coated rotary shaft for operating the transfer roller drive motor.

  In one aspect, the rotary shaft drive motor can be operated such that the rotational speed of the rotary shaft during the separation operation is higher than the transfer speed of the rotary shaft.

  Instead of or in addition to this, the transfer roller drive motor is operated so that the rotational speed of the transfer roller during the separation operation becomes the transfer roller separation speed that is lower than the transfer roller transfer speed. Can.

  The method for producing a coated rotary shaft according to the present invention may further include a drying step of drying the paint on the outer peripheral surface of the rotary shaft at the non-transfer position.

  Preferably, the rotation shaft drive motor can be operated such that the rotation speed of the rotation shaft in the drying step is higher than the rotation shaft transfer speed.

  In the above various embodiments of the method for manufacturing a coated rotary shaft according to the present invention, preferably, the rotary shaft and the rotary shaft drive motor are supported on a rotary disk rotationally driven about a central axis by a rotary disk drive motor. When the rotary disc is positioned at the transfer rotational position around the central axis, the rotational axis is positioned at the transfer position, and when the rotational disc is rotated by a predetermined angle around the central axis from the transfer rotational position, the rotational axis is not rotated. It may be configured to be located at the transfer position.

  Further, in order to achieve the above object, the present invention provides a transfer roller rotatable about an axis, a paint supply means for supplying paint to the outer peripheral surface of the transfer roller, and rotationally driving the transfer roller about an axis. A transfer roller drive motor and a rotary disk rotatable about a central axis, the rotary shaft serving as the work object to which paint is attached to the outer peripheral surface is rotatable about an axis in a posture parallel to the transfer roller A rotary disk to support, a rotary shaft drive motor supported by the rotary disk to drive the rotary shaft to rotate about the axis, a rotary disk drive motor to rotate the rotary disk to rotate about the central axis, and a transfer roller drive A motor, a rotary shaft drive motor, and a control device for controlling the rotary disk drive motor, the rotary disk supports the rotary shaft at an outer peripheral edge, and is positioned at a predetermined transfer rotational position around a central axis. Then, the rotational shaft is positioned at the transfer position where the outer peripheral surface of the rotational shaft is in pressure contact with the outer peripheral surface of the transfer roller, and when it is rotated about the central axis from the transfer rotational position by a predetermined angle. There is provided a manufacturing apparatus for a filmed rotating shaft configured to position the rotating shaft at a non-transfer position separated from the transfer roller.

  Preferably, at the time of transfer in which the rotating shaft is positioned at the transfer position and the paint is transferred from the transfer roller to the rotating shaft, the control device transfers the rotating shaft at a predetermined rotating shaft transfer time. The rotary shaft drive motor and the transfer roller drive motor are operated to rotate at a predetermined speed and to rotate the transfer roller at a predetermined transfer roller transfer speed, while the pressure contact state of the rotary shaft and the transfer roller is At the time of the separation operation for releasing, the rotation shaft drive motor and the transfer roller drive motor are operated so that the rotation shaft is accelerated relative to the transfer roller.

  Preferably, the rotary disk is capable of supporting a plurality of the rotation axes at regular intervals around the central axis, and the rotation disk is positioned at a predetermined first transfer rotational position around the central axis. The first rotation axis of the axes is positioned at the transfer position, and the remaining rotation axes are positioned at the non-transfer position, and rotated about the central axis by an angle corresponding to the equal intervals from the first transfer rotation position. When the second transfer rotational position about the central axis is positioned at the second transfer rotational position, the second rotational axis adjacent to the opposite side of the rotational direction of the rotary disc from the first rotational axis is positioned at the transfer position and the remaining rotational axes are It is configured to be located at the non-transfer position.

  For example, the paint supply means has a paint tank whose upper part is open and an axis parallel to the transfer roller, and is in contact with the outer peripheral surface of the transfer roller and at least a part of which is stored in the paint tank. And a smooth roller having an outer peripheral surface immersed in the paint.

  According to the method of manufacturing a coated shaft having a coating of the present invention, in the transfer step, the rotating shaft rotates at a predetermined rotational shaft transfer speed, and the transfer roller rotates at a predetermined transfer roller transfer speed. During the separation operation in which the rotary shaft drive motor and the transfer roller drive motor are operated while the rotary shaft is moved from the transfer position to release the pressure contact state with the transfer roller, the rotary shaft serves as the transfer roller. On the other hand, since the rotary shaft drive motor and the transfer roller drive motor are operated so as to be relatively accelerated, it is possible to effectively prevent the occurrence of "drop of paint" on the outer peripheral surface of the rotary shaft. It is possible to reduce or prevent as much as possible the occurrence of irregularities in the coating film produced by the paint.

  Further, according to the manufacturing apparatus for a coated shaft with a coating according to the present invention, the transfer roller receives the supply of the paint by the paint supply unit and is rotationally driven about the axis by the transfer roller drive motor, and the center by the rotary disc drive motor. A rotary disk supporting a rotary shaft driven to rotate about an axis and driven to rotate around an axis by a rotary shaft drive motor at an outer peripheral edge, control of the transfer roller drive motor, the rotary shaft drive motor and the rotary plate drive motor A control device for controlling the rotation shaft, the rotation disk being positioned at a transfer position pressed against the transfer roller when the rotation disk is positioned at a predetermined transfer rotation position around a central axis, and from the transfer rotation position The rotary shaft is configured to be positioned at the non-transfer position separated from the transfer roller when rotated by a predetermined angle around the central axis. A coating film which can effectively prevent or reduce the occurrence of "liquid dripping of the coating" on the outer peripheral surface of the rotating shaft, and prevent or reduce as much as possible the occurrence of irregularities in the coating film produced by the coating The attached rotary shaft can be manufactured efficiently.

FIG. 1 is a schematic plan view of a manufacturing apparatus according to an embodiment of the present invention. FIG. 2 is a schematic cross-sectional view taken along the line II-II in FIG. 1, and shows a state where the rotating disk is located at the first transfer rotation position. FIG. 3 is a schematic cross-sectional view corresponding to FIG. 2, and shows a state in which the rotating disk is located at the second transfer rotation position. FIG. 4 is a schematic cross-sectional view corresponding to FIG. 2 and FIG. 3, and shows a state in which the rotary disc is positioned at the third transfer rotation position. FIG. 5 is a developed image of the rotation axis according to the embodiment. FIG. 6 is a developed image of the rotation axis according to the comparative example. FIG. 7 is a schematic plan view of a manufacturing apparatus according to a modification of the embodiment.

Hereinafter, an embodiment of a method of manufacturing a coated shaft with a coating according to the present invention will be described with reference to the attached drawings.
FIG. 1 shows a schematic plan view of a manufacturing apparatus 1 suitable for carrying out the manufacturing method according to the present embodiment, and FIG. 2 shows a schematic sectional view taken along the line II-II in FIG.

  The manufacturing apparatus 1 includes a transfer roller 30 rotatable about an axis, a paint supply unit 10 for supplying a paint to the outer peripheral surface of the transfer roller 30, and a transfer roller driving to rotate the transfer roller 30 about an axis. A motor 35 and a rotary disc 40 rotatable about a central axis, the rotary shaft 50 serving as a work object to which paint is attached to the outer peripheral edge thereof is rotatable about an axis in parallel with the transfer roller 30 A rotary disk 40 for supporting, a rotary shaft drive motor 55 supported by the rotary disk 40 to drive the rotary shaft 50 to rotate about the axis, and a rotary disk drive motor 45 to drive the rotary disk 40 to rotate about the central axis And a control device 100 for controlling the transfer roller drive motor 35, the rotary shaft drive motor 55, and the rotary disc drive motor 45.

  The transfer roller 30 has a shaft main body 31 rotationally driven about the axis by the transfer roller drive motor 35, and a roller main body 33 such as sponge externally inserted into the shaft main body 31.

In the present embodiment, the shaft main body 31 is a hollow shaft, and is rotationally driven by the transfer roller drive motor 35 via the connecting member 32 inserted into the hollow portion of the shaft main body 31 so as to be relatively non-rotatable. Ru.
As a matter of course, the shaft main body 31 can also be a solid shaft, for example, a stepped solid shaft with an end portion having a small diameter.

  When the rotary disc 40 is positioned at a predetermined transfer rotational position around a central axis, the rotary shaft 50 is positioned at a transfer position P where the outer peripheral surface of the rotary shaft 50 is in pressure contact with the outer peripheral surface of the transfer roller 30. The rotation shaft 50 is positioned at the non-transfer position U where the pressure contact with the transfer roller 30 is released when the transfer rotation position is rotated by a predetermined angle around the central axis.

  In the present embodiment, as shown in FIG. 1, the rotary disc 40 is positioned on the central axis, and a pair of rotary plates 41 supporting one side and the other side of the rotary shaft 50 in the axial direction. And a central shaft 43 for supporting each of the pair of rotary plates 41 relative to each other in the axial direction on one side and the other side, and the central shaft 43 is rotated about the axis by the rotary disk drive motor 45. It is supposed to be driven.

  Preferably, the rotating disk 40 can support the plurality of rotating shafts 50 at equal intervals around the central axis.

  In the present embodiment, as shown in FIG. 2, the rotary disc 40 is capable of supporting three rotary shafts 50 of first to third rotary shafts 50 (1) to 50 (3). In this case, the first to third rotary shafts 50 (1) to 50 (3) are disposed at intervals of 120 degrees around the central axis, and the rotary shaft drive motors 55 (1) to 55 (3) are respectively disposed. Is rotationally driven about the axis by the

  Specifically, the second rotation shafts 50 (2) are arranged on the opposite side to the rotation direction R of the rotary disc 40 from the first rotation shaft 50 (1) around the central axis at the same interval (this embodiment) ) Are spaced apart by 120 degrees.

  The third rotation shafts 50 (3) are arranged at equal intervals (in the present embodiment, in the direction opposite to the rotation direction R of the rotary disc 40 about the central axis from the second rotation shaft 50 (2). Is spaced apart by 120 degrees), and the first rotation shaft 50 (1) makes the rotation direction R of the rotary disc 40 about the central axis from the first rotation shaft 50 (1). It will be spaced apart by equal intervals.

  When the rotary disc 40 is capable of supporting a plurality of rotary shafts 50 arranged at equal intervals around the central axis, the rotary discs 40 set the rotary shafts 50 at the transfer position P, respectively. A plurality of transfer rotational positions to be positioned can be taken.

  That is, as in the present embodiment, in the case where the rotary disc 40 is capable of supporting three rotary shafts of the first to third rotary shafts 50 (1) to 50 (3), The board 40 takes first to third transfer rotational positions for positioning the first to third rotary shafts 50 (1) to 50 (3) at the transfer position P as the transfer rotational positions, respectively. Ru.

Specifically, when the rotary disc 40 is positioned at the first transfer rotation position, the first rotary shaft 50 (1) is positioned at the transfer position P.
FIG. 2 shows the state where the rotating disk 40 is positioned at the first transfer rotation position.

  As shown in FIG. 2, at this time, the third rotation shaft 50 (3) is a first non-uniformly separated first transfer member in the rotational direction R of the rotary disc 40 from the transfer position P around the central axis. The second rotation shaft 50 (2) is located at the transfer position U (1), and the second rotation shaft 50 (2) is equally spaced from the first non-transfer position U (1) in the rotational direction R of the rotary disc 40 around the central axis. It is located at the second non-transfer position U (2) spaced apart.

When the rotary disc 40 is rotated from the first transfer rotational position around the central axis by the same interval in the rotational direction R in the rotational direction R, the second transfer rotational position is located, and the second rotational shaft 50 (2) is transferred to the transfer position. Position P
FIG. 3 shows a schematic cross-sectional view of the state where the rotary disc 40 is positioned at the second transfer rotation position.

  As shown in FIG. 3, at this time, the first rotation shaft 50 (1) is located at the first non-transfer position U (1), and the third rotation shaft 50 (3) is at the second non-transfer position. Located at U (2).

When the rotary disc 40 is rotated from the second transfer rotational position around the central axis by the same intervals in the rotational direction R in the rotational direction R, it is positioned at the third transfer rotational position, and the third rotational shaft 50 (3) is transferred to the transfer position. Position P
FIG. 4 is a schematic cross-sectional view of the state where the rotary disc 40 is positioned at the third transfer rotation position.

  As shown in FIG. 4, at this time, the second rotation shaft 50 (2) is located at the first non-transfer position U (1), and the first rotation shaft 50 (1) is at the second non-transfer position. Located at U (2).

  In the control device 100, when the rotating shaft 50 is positioned at the transfer position P and transfer of paint from the transfer roller 30 to the rotating shaft 50 is being performed, the rotating shaft 50 is rotated by a predetermined amount. The operation control of the rotation shaft drive motor 55 and the transfer roller drive motor 35 is performed so that the transfer roller 30 rotates at a shaft transfer speed and the transfer roller 30 rotates at a predetermined transfer roller transfer speed.

  Here, the rotational shaft transfer speed and the transfer roller transfer speed are set such that the peripheral speed of the outer peripheral surface of the rotary shaft 50 and the peripheral speed of the outer peripheral surface of the transfer roller 30 are the same. The pattern, the second pattern set so that the peripheral velocity of the outer peripheral surface of the rotating shaft 50 is higher than the peripheral velocity of the outer peripheral surface of the transfer roller 30, and the peripheral velocity of the outer peripheral surface of the rotating shaft 50 It includes a third pattern set to be lower than the peripheral velocity of the outer peripheral surface of the transfer roller 30.

  In the manufacturing apparatus 1, the control device 100 performs the separation operation for releasing the pressure contact state of the rotating shaft 50 and the transfer roller 30, that is, the transfer rotating position of the rotating plate 40 by the rotating plate drive motor 45. When the rotary shaft 50 is rotated about the central axis, the operation of the rotary shaft drive motor 55 and / or the transfer roller drive motor 35 so that the rotational shaft 50 is accelerated relative to the transfer roller 30. It is configured to perform control.

  Specifically, the phrase "to accelerate the rotational shaft 50 relative to the transfer roller 30" means that the rotational shaft transfer speed and the transfer roller transfer speed are set in the first pattern. In this case, the control device 100 controls the rotation shaft drive motor 55 so that the peripheral velocity of the outer peripheral surface of the rotation shaft 50 is higher than the peripheral velocity of the outer peripheral surface of the transfer roller 30 during the separation operation. This means that acceleration control is performed and / or deceleration control of the transfer roller drive motor 35 is performed.

  When the rotational shaft transfer speed and the transfer roller transfer speed are set in the second pattern, the peripheral speed difference between the outer peripheral surface between the rotational shaft 50 and the transfer roller 30 is more separated than that during transfer. It means that the control device 100 controls acceleration of the rotary shaft drive motor 55 and / or decelerates control of the transfer roller drive motor 35 so as to increase sometimes.

  When the rotational shaft transfer speed and the transfer roller transfer speed are set in the third pattern, the peripheral speed difference between the outer peripheral surface between the rotational shaft 50 and the transfer roller 30 is more separated than that during transfer. The control device 100 is configured to reduce the speed at the time, or the peripheral speed of the outer peripheral surface of the rotating shaft 50 to be higher than the peripheral speed of the outer peripheral surface of the transfer roller 30 during the separation operation. This means that the rotational shaft drive motor 55 is controlled to accelerate and / or the transfer roller drive motor 35 is controlled to decelerate.

  The start timing of “during separation operation” can be timing at which the rotating shaft 50 in the pressure contact state is separated from the transfer roller 30. That is, the timing when the rotating disk drive motor 45 starts the rotation of the rotating disk 40 can be set as the start timing of "during separation operation".

  As described above, when the rotating shaft 50 is separated from the transfer roller 30 while the paint is applied to the outer peripheral surface of the rotating shaft 30 by the transfer from the transfer roller 30, the transfer shaft 30 is transferred to the transfer roller 30. By rotating at a relatively high speed, it is possible to effectively prevent or reduce the occurrence of irregularities in the coating film on the rotating shaft 50 obtained by drying and curing the coating material.

  That is, when the rotating shaft 50 is moved away from the transfer state in which the rotating shaft 50 is in pressure contact with the transfer roller 30, the surface tension of the rotating shaft 50 is transferred to the transfer roller 30 due to the surface tension of the paint. "Dropping of paint" occurs in the portion in contact, and as a result, the coating film on the rotating shaft 50 has irregularities.

  When the rotating shaft 50 is supported by a bearing member so as to be rotatable about an axis so as to use the rotating shaft 50 as a transport roller in an image forming apparatus such as a printer or a facsimile, the coating film on the rotating shaft 50 has unevenness. If this is done, peeling of the coating film and / or surface abrasion of the bearing member will occur in the region of the outer peripheral surface of the rotating shaft 50 supported by the bearing member.

  In this regard, as described above, when the rotating shaft 50 is moved away from the transfer roller 30, the rotating shaft 50 is accelerated relative to the transfer roller 30 at a high speed to rotate the rotating shaft. It is possible to effectively prevent or reduce the occurrence of "liquid dripping of paint" on the outer peripheral surface of 50, and as a result, it is possible to effectively prevent or reduce the occurrence of irregularities in the coating film on the rotating shaft 50.

  Further, according to the manufacturing apparatus 1, while the transfer roller 30 and the rotating shaft 50 are rotated about the axis at independent rotational speeds, transfer of paint from the transfer roller 30 to the rotating shaft 50 is performed. The rotation shaft 50 is moved in a tangential direction with the transfer roller 30 while maintaining the rotation of the rotation shaft 50 and the transfer roller 30 around the axis by rotating the rotation disk 40 around the central axis. Thus, the pressure contact state of the rotating shaft 50 and the transfer roller 30 can be released.

  This configuration also can effectively prevent or reduce the occurrence of "drop of paint" on the outer peripheral surface of the rotary shaft 50, and as a result, can effectively make the coating film on the rotary shaft 50 uneven. It can be prevented or reduced.

Further, according to the manufacturing apparatus 1, the drying process of the paint can be performed while rotating the rotating shaft 50 at the desired rotation speed at the non-transfer position U.
Therefore, even in the drying step, "drop of paint" can be effectively prevented or reduced.

Preferably, the rotation shaft drive motor can be operated such that the rotation speed of the rotation shaft 50 in the drying step is higher than the rotation shaft transfer speed.
According to such a configuration, it is possible to more effectively prevent or reduce "liquid dripping of paint".

  Furthermore, according to the result of the outer diameter measurement after the drying step, if necessary, the rotary disc 40 is rotated about the central axis to transfer the rotary shaft 50 from the non-transfer position U to the transfer position P again. Then, the paint can be reapplied to the rotating shaft 50.

  If it becomes OK in the outer diameter measurement after the drying step, the rotary shaft 50 is removed from the manufacturing apparatus 1, and the subsequent steps such as baking are performed.

In the manufacturing apparatus 1, preferably, a mounting hole (not shown) provided in the rotary disc 40 to support the rotary shaft 50 is an elongated hole extending in a radial direction based on the central axis. it can.
According to such a configuration, it is possible to apply the paint to the rotating shafts 50 of various shaft diameters.

  As shown in FIGS. 1 and 2, in the manufacturing apparatus 1, the paint supply unit 10 has a paint tank 11 whose upper portion is open, and an axis parallel to the transfer roller 30. And a smooth roller 20 having an outer circumferential surface which is in contact with the outer circumferential surface of the toner and at least a part of which is immersed in the paint stored in the paint tank 11; The paint is supplied through.

Preferably, the paint supply means 10 can include a smooth roller drive motor 25 for rotationally driving the smooth roller 20 about an axis.
By providing the smooth roller drive motor 25, the amount of paint supplied from the smooth roller 20 to the transfer roller 30 can be adjusted with good controllability.

  Here, the state of the coating film on the coating-coated rotating shaft (example) manufactured by an example of the manufacturing method according to the present embodiment will be described.

The said Example was manufactured on condition of the following.
Transfer roller 30: A steel shaft main body 31 having a diameter of 18 mm and a urethane resin roller main body 33 fixed to the outer peripheral surface of the shaft main body 31 are provided, and the diameter of the roller main body 33 is 20 mm.
Rotating shaft 50: made of steel with a diameter of 10 mm.
Paint: epoxy phenol resin based paint At the time of transfer processing: The state where the transfer roller 30 is rotationally driven so that the peripheral speed is 58 mm / s, and the rotational shaft 50 is rotationally driven such that the peripheral speed is 29 mm / s Then, the rotating shaft 50 was rotated about the axis only twice.
During separation operation: At the timing of separating the rotation shaft 50 from the transfer roller 30, the rotational speed of the transfer roller 30 is reduced so that the peripheral speed is 35 mm / s, and the peripheral speed is 93 mm / s. The rotational speed of the rotary shaft 30 was increased.
At the time of drying treatment: Drying was performed for 2 minutes while rotating the rotating shaft 50 so that the peripheral speed was maintained at 93 mm / s.

  FIG. 5 shows a developed image of the outer peripheral surface of the embodiment.

  The coated shaft (comparative example) was manufactured under the same conditions as in the above example except for the conditions at the time of the separation operation.

The conditions at the time of the separation operation in the comparative example were the same as at the time of transfer.
That is,
During separation operation: The transfer roller 30 is rotationally driven so that the peripheral speed is 58 mm / s, and the rotation shaft 50 is rotationally driven so that the peripheral speed is 29 mm / s, 50 was separated from the transfer roller 30.

  FIG. 6 shows a developed image of the outer peripheral surface of the comparative example.

  As apparent from FIG. 5 and FIG. 6, in the example, “unevenness” of the coating film is reduced as compared with the comparative example.

In FIG. 7, the model top view of the manufacturing apparatus 2 which concerns on a modification is shown.
The manufacturing apparatus 2 according to the modification is different from the manufacturing apparatus 1 only in that a transfer roller 30 B is provided instead of the transfer roller 30.

That is, the transfer roller 30 in the manufacturing apparatus 1 is configured to transfer the paint to the entire axial direction of the rotating shaft 50.
Specifically, as described above, the transfer roller 30 includes a shaft 31 which is rotationally driven about the axis by the transfer roller drive motor 35, and a roller main body 33 such as sponge externally inserted in the shaft 31. The roller body 33 is configured to be able to abut on the entire axial direction of the rotating shaft 50.

  On the other hand, as shown in FIG. 7, the transfer roller 30B in the manufacturing apparatus 2 according to the modification includes the shaft main body 31 and a roller main body 33B extrapolated to the shaft main body 31, and the roller The main body 33B is configured to abut only in a predetermined region in the axial direction of the rotation shaft 50.

In the manufacturing apparatus 2 shown in FIG. 5, the roller main body 33B has a pair of roller members 34 that abut on one side and the other side in the axial direction of the rotating shaft 50, respectively.
In the second modification with such a configuration, the paint is applied only to the axial direction one end side area 50a and the other end side area 50b of the rotary shaft 50, and the paint is applied to the axial central area 50c of the rotary shaft 50. I will not.

  As described above, by changing the configuration of the transfer rollers 30 and 30B, the paint can be applied only to a desired region in the axial direction of the rotating shaft 50.

1, 2 Manufacturing device 10 Paint supply means 11 Paint tank 20 Smooth roller 30 Transfer roller 35 Transfer roller drive motor 40 Rotary disc 45 Rotary disc drive motor 50 Rotary shaft 55 Rotary shaft drive motor 100 Controller

Claims (10)

A method of manufacturing a coated rotating shaft, comprising
At the transfer position where the rotating shaft driven to rotate around the axis by the rotating shaft drive motor is in parallel contact with the transfer roller driven to rotate around the axis by the transfer roller drive motor while the paint is supplied to the outer peripheral surface A transfer step of transferring the paint on the transfer roller to the outer peripheral surface of the rotating shaft by being positioned;
Moving the rotary shaft from the transfer position to a non-transfer position where pressure contact with the transfer roller is released after the rotary shaft is rotated at least once about an axis in the transfer step;
In the transfer step, the rotation shaft drive motor and the transfer roller drive motor are operated so that the rotation shaft rotates at a predetermined rotation shaft transfer speed and the transfer roller rotates at a predetermined transfer roller transfer speed. The rotating shaft is accelerated relative to the transfer roller at the time of separation operation in which the rotating shaft is moved from the transfer position to release the pressure contact state with the transfer roller. A method of manufacturing a coated shaft with a coated film, characterized in that the rotary shaft drive motor and the transfer roller drive motor are operated.   The rotary shaft drive motor according to claim 1, wherein the rotary shaft drive motor is operated such that the rotational speed of the rotary shaft during the separation operation is higher than the rotational shaft transfer speed. Production method.   The transfer roller drive motor is operated such that the rotational speed of the transfer roller at the time of the separation operation becomes the transfer roller separation speed that is lower than the transfer roller transfer speed. The manufacturing method of the coating-coated rotating shaft as described.   The method according to any one of claims 1 to 3, further comprising a drying step of drying the paint on the outer peripheral surface of the rotating shaft at the non-transfer position.   The rotary shaft drive motor according to claim 4, wherein the rotary shaft drive motor is operated such that the rotational speed of the rotary shaft in the drying step is higher than the transfer speed of the rotary shaft. Production method.   The rotary shaft and the rotary shaft drive motor are supported by a rotary disk rotationally driven about a central axis by a rotary disk drive motor, and the rotary disk is positioned at the transfer rotational position around the central axis when the rotary shaft is positioned at the rotational position. 6. The apparatus according to claim 1, wherein the rotational shaft is positioned at the non-transfer position when the transfer shaft is positioned at the transfer position and rotated by a predetermined angle around the central axis from the transfer rotational position. The manufacturing method of the coating-coated rotating shaft as described in any of the above. A transfer roller which is rotatable about its axis,
Paint supply means for supplying paint to the outer peripheral surface of the transfer roller;
A transfer roller drive motor that rotationally drives the transfer roller about an axis;
A rotary disk rotatable about a central axis, the rotary disk rotatably supporting an axis of rotation in parallel with the transfer roller, the rotary shaft serving as a work object to which paint is attached on the outer peripheral surface;
A rotary shaft drive motor supported by the rotary disk and rotationally driving the rotary shaft about an axis;
A rotary disk drive motor which rotationally drives the rotary disk about a central axis;
And a control device that controls the transfer roller drive motor, the rotary shaft drive motor, and the rotary plate drive motor.
The rotary disk supports the rotating shaft at an outer peripheral edge, and when the rotating disk is positioned at a predetermined transfer rotational position around a central axis, the outer peripheral surface of the rotating shaft is pressed against the outer peripheral surface of the transfer roller. And the rotational shaft is positioned at a non-transfer position separated from the transfer roller when it is rotated from the transfer rotational position by a predetermined angle around the central axis. A manufacturing apparatus for a coated shaft with a coating characterized by   The controller rotates the rotational shaft at a predetermined rotational shaft transfer speed when transferring the paint from the transfer roller to the rotational shaft while the rotational shaft is positioned at the transfer position. And operating the rotary shaft drive motor and the transfer roller drive motor such that the transfer roller rotates at a predetermined transfer roller transfer speed, and releasing the pressure contact state of the rotary shaft and the transfer roller 8. The paint according to claim 7, wherein, in operation, the rotary shaft drive motor and the transfer roller drive motor are operated so that the rotary shaft is accelerated relative to the transfer roller. Production equipment for rotating shafts with membranes.   The rotary disc is capable of supporting a plurality of the rotation axes at regular intervals around the center axis, and when the rotation disc is positioned at a predetermined first transfer rotation position around the center axis, among the plurality of rotation axes The first rotation axis is positioned at the transfer position, and the remaining rotation axes are positioned at the non-transfer position, and are rotated about the central axis by an angle corresponding to the equal intervals from the first transfer rotational position. When it is positioned at the second transfer rotational position, the second rotational axis adjacent to the first rotational axis on the opposite side of the rotational direction of the rotary disc is positioned at the transfer position, and the remaining rotational axis is the non-transfer The apparatus for producing a coated rotary shaft according to claim 7 or 8, wherein the apparatus is positioned.   The paint supply means has a paint tank with an open top and an axis parallel to the transfer roller, and is in contact with the outer peripheral surface of the transfer roller and at least a part of which is stored in the paint tank. 10. The apparatus for producing a coated shaft as set forth in any one of claims 7 to 9, further comprising: a smooth roller having an immersed outer peripheral surface.