JP7484577B2 - Method for recycling cylindrical body, manufacturing method for rotating body, and device for recycling cylindrical body - Google Patents

Description

The present invention relates to a method for recycling a cylindrical body, a method for manufacturing a rotating body, and a device for recycling a cylindrical body.

Patent document 1 describes an electrophotographic photoreceptor that includes a photoreceptor drum having a photosensitive layer formed on the surface of a cylindrical conductive substrate, and a flange having at least a conductive portion, the flange being attached to the end of the photoreceptor drum via the conductive portion and an electrically-releasable adhesive.

Patent Publication 2010-231029

The present invention aims to suppress the occurrence of damage such as scratches to the cylindrical body, and to suppress the occurrence of coating residue on the cylindrical body during the process of peeling off the coating, compared to a case in which the process includes a process of peeling off the coating after heating to a temperature higher than the crosslinking temperature of the coating.

The method for recycling a cylindrical body according to the first aspect includes the steps of: preparing a metallic cylindrical body having a coating film mainly composed of a thermosetting resin formed on its outer peripheral surface and a pair of supports mainly composed of a thermoplastic resin joined to both ends of its inner peripheral surface via a bonding material; gripping the axial center of the cylindrical body via the coating film, heating both axial ends of the cylindrical body at a temperature lower than the crosslinking temperature of the coating film and the melting point of the supports and higher than the softening point of the bonding material, and moving the pair of supports toward the outside in the axial direction of the cylindrical body to separate the pair of supports from the cylindrical body; and gripping the inner peripheral surface and spraying high-pressure liquid onto the coating film to peel off the coating film.

The second aspect of the cylindrical body regeneration method is the cylindrical body regeneration method described in the first aspect, in which the step of separating the pair of supports from the cylindrical body involves electromagnetic induction heating only the ends of the cylindrical body.

A third aspect of the cylindrical body regeneration method is the cylindrical body regeneration method described in the second aspect, in which the step of separating the pair of supports from the cylindrical body involves electromagnetic induction heating of the ends using a coil that surrounds the ends of the cylindrical body and has a length in the axial direction that is longer than the length of the joint between the inner circumferential surface and the supports in the axial direction of the cylindrical body.

The cylinder recycling method according to the fourth aspect is the cylinder recycling method according to the third aspect, in which the step of separating the pair of supports from the cylinder includes adjusting the insertion amount of the ends into the coil and then heating the ends by electromagnetic induction.

The manufacturing method of the rotating body according to the fifth aspect includes a step of forming another coating film on the outer peripheral surface of the cylindrical body regenerated by the cylindrical body regenerating method according to any one of the first to fourth aspects, and a step of joining a support to both ends of the inner peripheral surface of the cylindrical body on which the other coating film is formed, using a joining material.

The cylindrical body recycling device of the sixth aspect comprises a gripping means for gripping, via the coating, the axial center of a metallic cylindrical body having a coating film mainly composed of thermosetting resin formed on its outer peripheral surface and a pair of supports mainly composed of thermoplastic resin joined to both ends of its inner peripheral surface via a bonding material , a heating means for electromagnetically inductively heating both axial ends of the cylindrical body gripped by the gripping means at a temperature lower than the crosslinking temperature of the coating film and the melting point of the supports and higher than the softening point of the bonding material, a separating means for moving the pair of supports toward the outside in the axial direction of the cylindrical body to separate the pair of supports from the cylindrical body gripped by the gripping means, and a peeling means for gripping the inner peripheral surface and spraying high-pressure liquid onto the coating film to peel off the coating film.

The cylinder recycling device according to the seventh aspect is the cylinder recycling device according to the sixth aspect, in which the heating means heats one end of the cylinder held by the holding means by electromagnetic induction, and the holding means includes a rotating part that changes the orientation of the cylinder relative to the heating means.

The cylindrical body recycling device according to the eighth aspect is the cylindrical body recycling device according to the seventh aspect, in which the separation means separates the support from one end of the cylindrical body gripped by the gripping means toward the outside in the axial direction of the cylindrical body.

According to the method for restoring a cylindrical body of the first aspect, the occurrence of damage such as scratches on the cylindrical body can be suppressed, and the occurrence of residues of the coating on the cylindrical body in the process of peeling off the coating can be suppressed, compared to a case in which the process includes a process of peeling off the coating after heating at a temperature higher than the crosslinking temperature of the coating.

According to the second aspect of the cylindrical body regeneration method, the bonding material can be softened in a short time compared to when the bonding material is softened by heating the support body.

According to the third aspect of the cylindrical body regeneration method, the joining material can be softened in a short time compared to when the length of the coil is shorter than the length of the joint.

According to the fourth aspect of the cylinder regeneration method, the same coil can be used to heat the ends of various cylinders with different dimensions of the joint with the support.

According to the manufacturing method of the rotating body according to the fifth aspect, the rotating body can be manufactured using the regenerated cylinder.

According to the cylindrical body recycling device of the sixth aspect, the occurrence of damage such as scratches on the cylindrical body is suppressed, and the occurrence of coating residue on the cylindrical body during the coating peeling process is suppressed compared to a configuration in which the coating is peeled off by heating to a temperature higher than the crosslinking temperature of the coating.

The seventh aspect of the cylindrical body regeneration device allows the cylindrical body regeneration device to be constructed at low cost compared to a configuration in which both ends of the cylindrical body are heated simultaneously by electromagnetic induction.

The cylindrical body recycling device according to the eighth aspect can be constructed at low cost compared to a configuration in which a pair of supports are simultaneously separated.

1 is a front view showing a schematic configuration of a cylindrical regenerating device according to an embodiment of the present invention; 1A is a front view of a photoconductor drum according to an embodiment, and FIG. 1B is a front cross-sectional view of the photoconductor drum according to an embodiment. FIG. 2 is a front cross-sectional view of a cylindrical body according to the embodiment. FIG. 2 is a front view showing a schematic configuration of a separation device according to an embodiment. FIG. 2 is a front view showing a coil constituting the heating device according to the embodiment. FIG. 2 is a side view showing a coil constituting the heating device according to the embodiment. 11A and 11B are operation explanatory diagrams illustrating an operation of a gripping portion of a separating device according to an embodiment for inserting a coil into an end portion of a photosensitive drum. 10 is an operation explanatory diagram illustrating an operation of a pull-out device gripping a flange of a photosensitive drum gripped by a gripping device of a separating device according to an embodiment. FIG. 10A and 10B are operation explanatory diagrams illustrating an operation in which a flange of a photosensitive drum is separated from a photosensitive drum by a gripping device and a pulling device of a separating device according to an embodiment. 1 is a front view showing a schematic configuration of a peeling device according to an embodiment;

An example of a cylindrical body recycling method, a rotating body manufacturing method, and a cylindrical body recycling device according to an embodiment of the present invention will be described with reference to Figs. 1 to 10.

In the following description, the device up-down direction (vertical direction), device width direction (horizontal direction), and device depth direction (horizontal direction) are respectively described as the H direction, W direction, and D direction when viewing the cylindrical playback device 20 (hereafter referred to as "playback device 20") from the front on which a user (not shown) stands. Furthermore, when it is necessary to distinguish between one side and the other in the device up-down direction, device width direction, and device depth direction, the top side will be described as the +H side, the bottom side as the -H side, the right side as the +W side, the left side as the -W side, the back side as the -D side, and the near side as the +D side when viewing the playback device 20 from the front.

(Playback device 20)
The regenerating device 20 according to this embodiment is a device used for regenerating the photoconductor drum 10 described later. In this embodiment, the worn photoconductor drum 10 collected during maintenance of the image forming device or the like is input into the regenerating device 20 to regenerate the cylindrical body 12 described later, and the cylindrical body 12 is input into a manufacturing line for the photoconductor drum 10 to manufacture a new photoconductor drum 10. Here, "regeneration" is synonymous with recycling, and refers to fully or partially reprocessing (e.g., a method described herein) a product (e.g., the photoconductor drum 10 described herein) to generate a reusable member (e.g., the cylindrical body 12 described herein) for manufacturing another product.

(Photoconductor drum 10)
As shown in Fig. 2A, the photoconductor drum 10 is a cylindrical member used in an electrophotographic image forming apparatus. The photoconductor drum 10 is an example of a rotating body. As shown in Fig. 2B, the photoconductor drum 10 includes a cylindrical body 12, a coating film 14, an insert member 16, a pair of flanges 18, and a bonding material 17.

As shown in FIG. 3, the cylinder 12 is a cylindrical member made of metal and extending in the device width direction. In this embodiment, the cylinder 12 is made of a conductive metal such as an aluminum alloy. In this embodiment, the outer peripheral surface and inner peripheral surface of the cylinder 12 are called the outer peripheral surface 12a and the inner peripheral surface 12b, respectively. In addition, in the longitudinal direction of the cylinder 12 (device width direction), the portion from the end face of the cylinder 12 toward the center by a set length L is called the end portion 12c.

As shown in FIG. 2(B), the coating film 14 is an organic photoreceptor layer formed on the outer peripheral surface 12a of the cylindrical body 12 and composed mainly of a thermosetting resin. Examples of the thermosetting resin in the present invention include epoxy resin, urethane resin, silicone resin, and phenol-formaldehyde resin. Since the coating film 14 is composed mainly of a thermosetting resin, it hardens at a crosslinking temperature T1 or higher. The crosslinking temperature T1 of the coating film 14 is higher than the softening point T2 of the bonding material 17 described below. In this embodiment, the crosslinking temperature T1 of the coating film 14 is 190°C.

The insertion member 16 is a member that is inserted inside the cylindrical body 12. In this embodiment, the insertion member 16 has a function of suppressing vibration of the photosensitive drum 10 when used in an image forming device. Note that the insertion member 16 is not limited to a member having a function of suppressing vibration, and may also have a sound-absorbing function or a heating function. Also, in the present invention, the photosensitive drum 10 may be configured without the insertion member 16.

The flanges 18 are members formed of a material mainly composed of a thermoplastic resin (e.g., polycarbonate) provided on both ends 12c of the longitudinal direction of the cylinder 12. The flanges 18 are an example of a support that serves as a supported member in the photosensitive drum 10. The flanges 18 have a cylindrical main body 18a, an end face 18b of the main body 18a, and a cylindrical protruding portion 18c protruding from the end face 18b by a length L. The central axes of the main body 18a and the protruding portion 18c are located within a tolerance range set with respect to the central axis of the cylinder 12 when viewed from the device width direction. The outer diameter of the main body 18a is larger than the inner diameter of the cylinder 12. The outer diameter of the protruding portion 18c is smaller than the inner diameter of the cylinder 12, and is a clearance fit with respect to the inner peripheral surface 12b of the cylinder 12.

The flange 18 has a protruding portion 18c inserted inside the end portions 12c on both sides of the longitudinal direction of the cylindrical body 12, and the outer periphery of the protruding portion 18c is joined to the inside of the end portion 12c of the cylindrical body 12 via the joining material 17. In other words, the flange 18 is joined to both ends of the inner circumferential surface 12b of the cylindrical body 12 via the joining material 17 at the protruding portion 18c. The portion where the protruding portion 18c of the flange 18 and both ends of the inner circumferential surface 12b of the cylindrical body 12 are joined by the joining material 17 is an example of a joining portion. In addition, the flange 18 in this embodiment is joined to the cylindrical body 12 with the end surface 18b in contact with the end surface of the cylindrical body 12, closing the openings on the end portion 12c side on both sides of the cylindrical body 12.

The melting point T3 of the flange 18 is higher than the softening point T2 of the bonding material 17. The melting point T3 of the flange 18 in this embodiment is 200° C. The flange 18 in this embodiment has insulating properties. Here, “insulating properties” refers to a volume resistivity of 10 ¹³ Ωcm or more.

The bonding material 17 is a hot melt adhesive that bonds the outer periphery of the protruding portion 18c of the flange 18 to the inside of the end portion 12c of the cylindrical body 12. The bonding material 17 softens when it reaches a temperature equal to or higher than the softening point T2. The softening point T2 of the bonding material 17 is higher than the temperature of the environment in which the photoconductor drum 10 is used. The bonding material 17 of the photoconductor drum 10 bonds the flange 18 to the cylindrical body 12 in a hardened state in the environment in which the photoconductor drum 10 is used. When the bonding material 17 softens at a temperature equal to or higher than the softening point T2 in the photoconductor drum 10, it loses the bonding force that bonds the flange 18 and the cylindrical body 12. The softening point T2 of the bonding material 17 in this embodiment is 140°C.

In this embodiment, a cyanoacrylate adhesive is used as the bonding material 17. The bonding material 17 in the present invention is not limited in composition, etc., as long as it is capable of bonding the metal cylinder 12 and the flange 18 whose main component is a thermoplastic resin, and the softening point T2 is lower than the crosslinking temperature T1 of the coating film 14 and the melting point T3 of the flange 18. The bonding material 17 in the present invention may be an ethylene vinyl acetate adhesive, a polyolefin adhesive, a polyamide adhesive, an acrylic adhesive, etc.

(Configuration of playback device 20)
As shown in Fig. 1, the regenerating device 20 includes a separation device 50 and a peeling device 40 arranged on the right side (+W side) of the separation device 50 in the device width direction. The regenerating device 20 also includes an inspection device 30 arranged on the opposite side of the separation device 50 across the peeling device 40, and configured to include an inspection camera or the like for inspecting the cylindrical body 12 regenerated by the regenerating device 20. The regenerating device 20 also includes a conveying device (not shown) configured to include an industrial robot or the like for conveying the work between the separation device 50, the peeling device 40, and the inspection device 30. The workpieces conveyed by the conveying device are the photosensitive drum 10, the workpiece 10a, and the cylindrical body 12. The workpiece 10a is a photosensitive drum 10 from which the flange 18 has been separated and the insertion member 16 has been pushed out, and a coating film 14 after consumption has been formed on the outer circumferential surface 12a of the cylindrical body 12.

The separating device 50 has the function of obtaining the work-in-progress 10a by separating the flange 18 and the insert member 16 from the photosensitive drum 10 inserted into the separating device 50. Details of the separating device 50 will be described later.

[Peeling device 40]
The peeling device 40 has a function of regenerating the cylindrical body 12 by peeling the coating film 14 from the work-in-progress 10a transported from the separating device 50 by a transporting device (not shown). As shown in FIG. 10 , the peeling device 40 includes a gripping unit 42, a positioning unit 44, and a peeling unit 46.

The gripping portion 42 is configured to include, for example, a collet chuck, and grips the work-in-progress 10a by contacting multiple points on the inner circumferential surface 12b at one end 12c of the work-in-progress 10a in an orientation extending in the width direction of the device. The portion of the inner circumferential surface 12b that contacts the gripping portion 42 is spaced apart from the end face of the cylinder 12 on the gripping portion 42 side toward the center of the cylinder 12 in the longitudinal direction of the cylinder 12, and the distance of separation exceeds the length L.

The positioning unit 44 is disposed on the opposite side of the gripping unit 42 across the work-in-process 10a gripped by the gripping unit 42, and includes a generally conical tip 44a tapering toward the gripping unit 42. The maximum diameter of the tip 44a is larger than the inner diameter of the cylindrical body 12 (work-in-process 10a), and the minimum diameter of the tip 44a is smaller than the inner diameter. The positioning unit 44 inserts the tip 44a into the inside of the end of the work-in-process 10a on the side not gripped by the gripping unit 42 and pushes the work-in-process 10a in the axial direction, thereby positioning the axis of the work-in-process 10a in the peeling device 40. In other words, the peeling device 40 has the function of gripping the inner circumferential surface 12b of the cylindrical body 12 with the gripping unit 42 and the positioning unit 44.

The gripping unit 42 and the positioning unit 44 have the function of rotating the gripped work-in-progress 10a around an axis.

The peeling unit 46 includes a nozzle 46a that sprays high-pressure liquid such as water toward the outer peripheral surface of the work-in-progress 10a held by the gripping unit 42 and the positioning unit 44, and a moving unit 46b that moves the nozzle 46a in the device width direction. When the high-pressure liquid is sprayed from the nozzle 46a toward the outer peripheral surface of the work-in-progress 10a, the coating film 14 is peeled off from the cylinder 12.

The peeling device 40 also includes a cleaning means (not shown) including a nozzle or the like that sprays a cleaning liquid to clean and remove the residue of the bonding material 17 on the inner surface 12b of the cylindrical body 12 and the residue of the coating film 14 that has been peeled off by the peeling section 46. The peeling device 40 also includes a collection container (not shown) that collects the residue of the bonding material 17 and the residue of the coating film 14 that have been cleaned and removed by the cleaning means (not shown) together with the liquid sprayed from the peeling section 46 and the cleaning liquid sprayed from the cleaning means (not shown).

The peeling device 40 has a function of peeling off the coating film 14 from the cylinder 12 by spraying high-pressure liquid onto the entire outer peripheral surface of the work-in-progress 10a, which is gripped by the gripping unit 42 and the positioning unit 44 and rotated around its axis, using the nozzle 46a and the moving unit 46b. In this way, the peeling device 40 regenerates the cylinder 12 from the work-in-progress 10a. The peeling device 40 is an example of a peeling means. The peeling device 40 may be configured to peel off the coating film 14 from the cylinder 12 by spraying high-pressure liquid only onto the area of the work-in-progress 10a where the coating film 14 is formed.

[Inspection device 30]
The inspection device 30 has a function of inspecting the cylindrical body 12 conveyed from the peeling device 40 for scratches and the like, and determining whether the cylindrical body 12 is a non-defective product or a defective product.

[Separation device 50]
Next, the separation device 50 will be described in detail.

As shown in FIG. 4, the separating device 50 includes a base 52, a gripping device 60, a heating device 70, a pulling device 80, and an extrusion device 90. The separating device 50 also includes a container 54 that houses the flange 18 separated from the photosensitive drum 10, and a container 56 that houses the insertion member 16 separated from the photosensitive drum 10. The separating device 50 also includes a control unit 58 that controls the operation of each part. The separating device 50 also includes a housing 50a that houses each part of the separating device 50.

The base 52 is a base on which the photosensitive drum 10 and the work-in-progress 10a are placed in a position extending in the device width direction. The base 52 is configured to include, for example, a V-block or the like that extends in the device width direction and opens upward, and has the function of positioning the flange 18 in the separating device 50 in the device depth direction and device up-down direction. The base 52 also includes a positioning member 52a that contacts the flange 18 in the device width direction to position the photosensitive drum 10 in the separating device 50 in the device width direction.

[Gripping device 60]
The gripping device 60 is provided above the base portion 52 and includes a gripping portion 62 and a support portion 64 .

The gripping unit 62 is, for example, a robot hand, and has the function of gripping the outer periphery of the photosensitive drum 10. In other words, the gripping unit 62 has the function of gripping the outer periphery 12a of the cylindrical body 12 via the coating film 14. The gripping device 60 equipped with the gripping unit 62 is an example of a gripping means. The operation of the gripping unit 62 is controlled by the control unit 58, and grips or releases the outer periphery of the photosensitive drum 10 and the work in progress 10a.

The support unit 64 includes a plurality of actuators and has the function of supporting the grip unit 62 from above. The support unit 64 includes a moving means 64a provided on the upper part of the housing 50a, a base 64b provided on the moving means 64a, and a lifting means 64c extending downward from the base 64b to support the grip unit 62.

The moving means 64a includes, for example, a linear actuator (not shown), and has the function of moving the base 64b in the device width direction. When the moving means 64a moves the base 64b, the lifting means 64c, the gripping portion 62, and the photoconductor drum 10 and the work-in-progress 10a gripped by the gripping portion 62 move in the device width direction together with the base 64b.

The base 64b includes a rotating means (not shown) such as a motor, and has the function of rotating the lifting means 64c around a vertical axis. When the base 64b rotates the lifting means 64c, the gripping portion 62 and the photoconductor drum 10 and work-in-progress 10a gripped by the gripping portion 62 rotate together with the lifting means 64c. The base 64b is an example of a rotating portion.

The lifting means 64c includes, for example, a linear actuator (not shown) and has the function of moving the gripping part 62 in the vertical direction of the device by expanding and contracting in the vertical direction of the device. When the lifting means 64c moves the gripping part 62, the photoconductor drum 10 and the work-in-progress 10a gripped by the gripping part 62 move in the vertical direction of the device together with the gripping part 62.

[Heating device 70]
The heating device 70 is disposed between the base portion 52 and the pulling device 80 described later in the device width direction, and is configured to include a heating section 72 that heats the end portion 12c of the photosensitive drum 10, and a base portion 74 that supplies power to the heating section 72.

As shown in Figs. 5 and 6, the heating unit 72 has both ends open in the device width direction as an axis, and is equipped with a metal coil 72a capable of surrounding the end 12c of the photosensitive drum 10. Specifically, the coil 72a has a distance between the openings on both sides that is longer than the length L, and an inner diameter that is larger than the outer diameter of the photosensitive drum 10. That is, the coil 72a can insert the end 12c of the cylindrical body 12, which is in a position along the axial direction of the coil 72a, through the opening of the coil 72a and store it in the space inside the coil 72a. When the coil 72a surrounds the end 12c of the cylindrical body 12, the heating unit 72 has a function of electromagnetic induction heating the end 12c by passing a current through the coil 72a using power supplied from the base 74. The heating device 70 equipped with the heating unit 72 is an example of a heating means.

The space inside the coil 72a, which is sandwiched between the openings on both sides of the coil 72a, is the effective range of electromagnetic induction heating by the heating device 70 in this embodiment. The heating unit 72 in this embodiment has a structure that continuously heats the end 12c of the cylindrical body 12 arranged inside the coil 72a for a predetermined time TI at room temperature, thereby raising the temperature of the end 12c to a predetermined temperature TE. In other words, the heating device 70 equipped with the heating unit 72 electromagnetically heats the end 12c of the cylindrical body 12 at a predetermined temperature TE. The predetermined temperature TE is lower than the crosslinking temperature T1 of the coating film 14 and the melting point T3 of the flange 18, and is equal to or higher than the softening point T2 of the joining material 17. The predetermined temperature TE in this embodiment is 160°C.

The axial length of the coil 72a in this embodiment is shorter than the difference between the axial length of the cylinder 12 and the length of the gripping portion 62 of the gripping device 60 in the device width direction divided by 2. That is, the coil 72a in this embodiment has a configuration in which the photosensitive drum 10, whose central portion in the axial direction is gripped by the gripping portion 62 of the gripping device 60, can be inserted from one opening and the flange 18 can be protruded outside the coil 72a from the other opening.

When the heating unit 72 heats the end 12c of the cylindrical body 12 of the photosensitive drum 10, the flange 18 joined to the end 12c is not heated by electromagnetic induction because it is insulating. In other words, the heating device 70 having the heating unit 72 heats only the end 12c of the cylindrical body 12 by electromagnetic induction.

The base 74 has a structure in which the supply or cut-off of power to the heating section 72 is controlled by the control section 58.

[Extraction device 80]
The pulling device 80 is disposed on the opposite side of the table portion 52 across the heating device 70 in the device width direction. The pulling device 80 includes a base portion 82, a rotating means 84, and a gripping portion 88. The operation of each portion of the pulling device 80 is controlled by the control portion 58.

The rotating means 84 is provided on the base 82 and includes, for example, a motor (not shown), and has a shaft portion 84a that extends toward the heating device 70 in the device width direction. The rotating means 84 rotates the shaft portion 84a around an axis that runs along the device width direction.

The gripping portion 88 includes a gripping mechanism such as a chuck, and is provided at the end of the shaft portion 84a. The gripping portion 88 grips the main body portion 18a of the flange 18, in which the protrusion 18c faces the opposite side of the main body portion 18a from the gripping portion 88, by contacting the main body portion 18a at multiple points on its outer periphery. The gripping portion 88 provided on the shaft portion 84a rotates together with the shaft portion 84a, which is rotated by the rotating means 84. The container 54 is disposed below the gripping portion 88.

The control unit 58 controls the gripping device 60 and the pull-out device 80 to pull out and separate the flange 18 from the cylindrical body 12. Specifically, the control unit 58 rotates the gripping unit 88 that grips the flange 18 with the rotating means 84 while moving the gripping unit 62 that grips the photosensitive drum 10 in a direction away from the pull-out device 80 beyond the length L. The combination of the gripping device 60 and the pull-out device 80 is an example of a separation means.

[Extrusion device 90]
The extrusion device 90 is disposed above the base 52, and includes an extrusion unit 92. The extrusion unit 92 includes, for example, a hydraulic cylinder (not shown), and has the function of expanding and contracting in the device width direction. The length of the extrusion unit 92 when fully expanded in the device width direction is longer than the length of the cylindrical body 12, and the maximum width as viewed in the device width direction is smaller than the inner diameter of the cylindrical body 12. In other words, the extrusion unit 92 has a structure that allows it to be inserted into the inside of the cylindrical body 12 from an opening at one end of the cylindrical body 12.

When both ends 12c of the cylindrical body 12 are open and the insert member 16 is inserted, the extrusion device 90 has the function of separating the insert member 16 from the cylindrical body 12 using the extrusion part 92. Specifically, when one end 12c of the cylindrical body 12 gripped by the gripping device 60 is positioned adjacent to the extrusion device 90 in the device width direction, the extrusion device 90 extends the extrusion part 92 and inserts it from the opening on the one end 12c side. Then, when the extrusion device 90 continues to extend the extrusion part 92, the insert member 16 inserted in the cylindrical body 12 is pushed out from the other end 12c of the cylindrical body 12 by the extrusion part 92. The insert member 16 pushed out from the cylindrical body 12 falls into the container 56 by gravity and is collected.

(Method of Regenerating the Cylindrical Body 12)
Next, a method for recycling the cylindrical body 12 in this embodiment will be described. The method for recycling the cylindrical body 12 in this embodiment includes a preparation step of preparing the worn photoconductor drum 10, a separation step of separating the flange 18 from the photoconductor drum 10, and an extrusion step of pushing out the insertion member 16 from the photoconductor drum 10. The method for recycling the cylindrical body 12 in this embodiment also includes a peeling step of peeling the coating film 14 from the work-in-progress 10a obtained from the photoconductor drum 10 to recycle the cylindrical body 12, and an inspection step of inspecting the recycled cylindrical body 12.

[Preparation process]
In the preparation step, the photosensitive drum 10 is inserted into the separating device 50 by a transport device (not shown) and placed on the platform 52 (see FIG. 4). At this time, the photosensitive drum 10 is positioned in the separating device 50 by the platform 52 and the positioning member 52a. Thereafter, the recycling method for the cylindrical body 12 is shifted from the preparation step to the separation step.

[Separation process]
In the separation process, first, the control unit 58 controls the gripping device 60 to move the gripping portion 62, and the gripping portion 62 grips the central portion in the axial direction of the photosensitive drum 10 arranged on the base portion 52. At this time, the gripping portion 62 grips the outer peripheral surface 12a of the cylindrical body 12 via the coating film 14. Therefore, the gripping portion 62 does not cause damage such as scratches to the cylindrical body 12 when gripping the outer peripheral portions of the photosensitive drum 10 and the work-in-progress 10a.

7, the control unit 58 moves the gripping unit 62 gripping the photosensitive drum 10, and inserts the flange 18 and end 12c on the heating device 70 side into the inside of the coil 72a of the heating device 70. At this time, the control unit 58 adjusts the insertion amount of the end 12c into the coil 72a. Specifically, the control unit 58 adjusts the insertion amount of the end 12c into the coil 72a so that at least the portion from the end face of the cylindrical body 12 on the heating device 70 side to the length L toward the center of the cylindrical body 12 is positioned within the effective range of electromagnetic induction heating by the heating device 70. The control unit 58 adjusts the insertion amount of the end 12c into the coil 72a so that the portions of the cylindrical body 12 other than the end 12c are not easily heated by the heating device 70. Specifically, the control unit 58 adjusts the insertion amount of the end 12c into the coil 72a so that the portion of the cylinder 12 whose distance to the end face on the heating device 70 side exceeds at least 1.5 times the length L is positioned outside the effective range of electromagnetic induction heating by the heating device 70. In other words, the control unit 58 adjusts the insertion amount of the end 12c into the coil 72a so that the portion of the cylinder 12 whose distance from the end face on the heating device 70 side to the center of the cylinder 12 exceeds 1.5 times the length L is positioned outside the effective range of electromagnetic induction heating by the heating device 70.

Then, the control unit 58 controls the base 74 of the heating device 70 to supply power to the heating unit 72, thereby heating the end 12c of the photosensitive drum 10 inserted inside the coil 72a for a set time TI to a set temperature TE. In other words, the end 12c of the cylindrical body 12 of the photosensitive drum 10 is heated to a set temperature TE in the separation process. Since the temperature TE is higher than the softening point T2 of the bonding material 17, this heating brings the end 12c to a temperature state above the softening point T2. Therefore, the bonding material 17 softens and loses the bonding force that bonds the end 12c to the flange 18. After the set time TI has elapsed since the end 12c of the photosensitive drum 10 was heated, the control unit 58 controls the base 74 to cut off the power to the heating unit 72.

Then, as shown in FIG. 8, the control unit 58 moves the gripping portion 62 of the gripping device 60 that grips the photosensitive drum 10, and moves the photosensitive drum 10 to a position where the gripping portion 88 of the pull-out device 80 can grip the flange 18 on the pull-out device 80 side of the photosensitive drum 10.

Then, the control unit 58 controls the pull-out device 80 to grip the flange 18 of the photosensitive drum 10 on the pull-out device 80 side with the gripping unit 88. Then, the control unit 58 further controls the gripping device 60 and the pull-out device 80 to move the gripping unit 62 gripping the photosensitive drum 10 in a direction away from the pull-out device 80 while rotating the gripping unit 88 gripping the flange 18 with the rotating means 84 as shown in FIG. 9. In other words, as seen from the photosensitive drum 10 gripped by the gripping unit 62, the gripping unit 88 gripping the flange 18 moves in a direction away from the axial outside of the cylinder 12. At this time, the bonding material 17 on the pull-out device 80 side of the photosensitive drum 10 is in a temperature state above the softening point T2 and has lost its bonding force. In this state, the control unit 58 separates the flange 18 from the cylindrical body 12 by moving the gripping portion 88, which grips the flange 18, a distance longer than the length L in a direction away from the cylindrical body 12 gripped by the gripping portion 62.

After the pull-out device 80 separates the flange 18 from the cylinder 12, the control unit 58 moves the gripping portion 62 that grips the photosensitive drum 10, and causes the photosensitive drum 10 to separate from the inside of the coil 72a. The control unit 58 also controls the pull-out device 80 to release the grip of the flange 18 by the gripping portion 88, and causes the flange 18 to fall by gravity and be collected in the container 54.

Then, the control unit 58 controls the gripping device 60 to rotate the gripping portion 62, which grips the photosensitive drum 10 by the base portion 64b, around the vertical axis, thereby changing the orientation of the photosensitive drum 10 gripped by the gripping portion 62 relative to the heating device 70. Specifically, the control unit 58 rotates the gripping portion 62 180 degrees around the vertical axis, so that the end portion 12c of the photosensitive drum 10 on the side where the flange 18 is not separated faces the heating device 70.

Then, the control unit 58 controls the gripping device 60, the heating device 70, and the pulling device 80 to repeat the above-mentioned operations of inserting the end 12c of the photosensitive drum 10 into the inside of the coil 72a, removing it from the inside of the coil 72a, and collecting the separated flanges 18. This separates the pair of flanges 18 from the cylindrical body 12 of the photosensitive drum 10 gripped by the gripping device 60. Thereafter, the method of recycling the cylindrical body 12 transitions from the separation process to the extrusion process.

[Extrusion process]
In the pushing-out process, the control unit 58 controls the gripping device 60 and the pushing-out device 90 to push out the insertion member 16 from the inside of the cylindrical body 12 and to collect the pushed-out insertion member 16 in the container 56. Through the above operations, the work-in-progress 10a is obtained from the photoconductor drum 10 gripped by the gripping device 60.

After the work-in-progress 10a is obtained from the photoconductor drum 10 gripped by the gripping device 60, the control unit 58 controls the gripping device 60 to place the work-in-progress 10a on the platform 52 and release it from the gripping device 62. Thereafter, a conveying device (not shown) conveys the work-in-progress 10a from the platform 52 to the peeling device 40, and the recycling method for the cylindrical body 12 transitions from the extrusion process to the peeling process.

[Peeling process]
In the peeling process, as shown in Fig. 10, the peeling device 40 grips the inner peripheral surface 12b of the work-in-progress 10a transported from the separation device 50 with the gripping section 42 and the positioning section 44, rotates the work-in-progress 10a around its axis, and peels off the coating film 14 with the peeling section 46 to regenerate the cylindrical body 12. The peeling device 40 also washes and removes the residue of the coating film 14 on the outer peripheral surface 12a of the regenerated cylindrical body 12 and the residue of the bonding material 17 on the inner peripheral surface 12b with a cleaning means (not shown). Thereafter, the peeling device 40 releases the grip of the regenerated cylindrical body 12 by the gripping section 42 and the positioning section 44, and a transport device (not shown) transports the cylindrical body 12 from the peeling device 40 to the inspection device 30, and the regeneration method for the cylindrical body 12 transitions from the peeling process to the inspection process.

[Inspection process]
In the inspection process, the inspection device 30 inspects the cylindrical body 12 conveyed from the peeling device 40 for scratches and the like, and judges whether it is a good product or a defective product. The cylindrical body 12 judged as a good product by the inspection device 30 is input into the manufacturing line for the photoconductor drum 10.

(Method of Manufacturing Photoconductor Drum 10)
Next, a method for manufacturing the photoreceptor drum 10 in this embodiment will be described. In this embodiment, the photoreceptor drum 10 is manufactured by feeding the cylindrical body 12 that has been regenerated by the regenerator 20 and determined to be a non-defective product into a manufacturing line for the photoreceptor drum 10. The method for manufacturing the photoreceptor drum 10 in this embodiment includes a forming step of forming a new coating film 14 on the outer peripheral surface 12a of the cylindrical body 12 to obtain an intermediate product consisting of the cylindrical body 12 and the new coating film 14. The method for manufacturing the photoreceptor drum 10 in this embodiment also includes an assembly step of assembling a new flange 18 and an insert member 16 to the intermediate product to obtain a new photoreceptor drum 10.

The new coating film 14 formed on the outer peripheral surface 12a of the cylindrical body 12 in the formation process is a different coating film 14 from the coating film 14 that is peeled off by the recycling device 20. That is, in the manufacturing method for the photoconductor drum 10 in this embodiment, in the formation process, another coating film 14 is formed on the outer peripheral surface 12a of the cylindrical body 12, other than the coating film 14 that is peeled off by the recycling device 20.

In the assembly process, first, the insert member 16 is inserted into the intermediate product obtained in the forming process. Then, the bonding material 17 is applied to both ends of the inner circumferential surface 12b of the intermediate product's cylindrical body 12, and the protruding portion 18c of the flange 18 is inserted to bond the flange 18, thereby manufacturing the photosensitive drum 10.

In the assembly process, if the flange 18 and the insert member 16 separated from the cylindrical body 12 and recovered during the recycling of the cylindrical body 12 function in the same way as a new flange 18 and insert member 16, the recovered flange 18 and insert member 16 may be assembled to the intermediate product. In addition, when joining the flange 18 to the intermediate product, the bonding material 17 may be applied to the inner surface 12b of the end portion 12c of the cylindrical body 12, or the bonding material 17 may be applied to the outer periphery of the protruding portion 18c of the flange 18.

(Action and Effects)
Next, the operation and effects of the embodiment will be described.

The method for recycling the cylindrical body 12 of the embodiment includes a process of heating the cylindrical body 12 of the photoconductor drum 10 to a predetermined temperature TE using a recycling device 20 and separating the pair of flanges 18 from the cylindrical body 12.

In the method of recycling the cylindrical body 12, if the cylindrical body 12 of the photosensitive drum 10 is heated to a temperature higher than the melting point T3 of the flange 18 in order to soften the bonding material 17, there is a risk that part of the flange 18 will melt. If the flange 18 is separated from the photosensitive drum 10 in a melted state, there is a risk that residue of the melted flange 18 will be generated inside the cylindrical body 12.

On the other hand, in the method for recycling the cylindrical body 12 of the embodiment, the cylindrical body 12 of the photosensitive drum 10 is heated at a temperature TE that is lower than the melting point T3 of the flange 18 and higher than the softening point T2 of the bonding material 17, so melting of the flange 18 is suppressed. Therefore, the method for recycling the cylindrical body 12 of the embodiment can suppress the generation of residue of the flange 18 in the process of separating the flange 18 compared to a case in which the process includes a step of heating the flange 18 at a temperature higher than the melting point T3 of the flange 18 to separate the flange 18. Also, the recycling device 20 of the embodiment can suppress the generation of residue of the flange 18 in the process of separating the flange 18 compared to a case in which the process includes a step of heating the flange 18 at a temperature higher than the melting point T3 of the flange 18 to separate the flange 18.

In addition, in the method for regenerating the cylindrical body 12, if the cylindrical body 12 of the photosensitive drum 10 is heated at a temperature higher than the crosslinking temperature T1 of the coating film 14 in order to soften the bonding material 17, crosslinking may be promoted and a part of the coating film 14 may harden. In addition, since the coating film 14 is formed on the outer peripheral surface 12a of the cylindrical body 12, it is ring-shaped in a cross section perpendicular to the longitudinal direction of the cylindrical body 12. When this coating film 14 hardens, it may shrink in diameter (the diameter of the ring becomes smaller), and the coating film 14 may adhere more firmly to the cylindrical body 12. If the work-in-progress 10a is formed from the photosensitive drum 10 with the coating film 14 hardened, and then the coating film 14 of the work-in-progress 10a is peeled off by the peeling device 40, there is a risk that residue of the coating film 14 may be generated on the surface of the cylindrical body 12.

On the other hand, in the embodiment of the method for regenerating the cylindrical body 12, the cylindrical body 12 of the photoconductor drum 10 is heated at a temperature TE that is lower than the crosslinking temperature T1 of the coating film 14 and higher than the softening point T2 of the bonding material 17, so that hardening of the coating film 14 is suppressed. Therefore, the embodiment of the method for regenerating the cylindrical body 12 can suppress the generation of residues of the coating film 14 in the process of peeling off the coating film 14 compared to a case in which the coating film is peeled off after heating at a temperature higher than the crosslinking temperature T1 of the coating film 14. Also, the embodiment of the regeneration device 20 can suppress the generation of residues of the coating film 14 in the process of peeling off the coating film 14 compared to a case in which the coating film is peeled off after heating at a temperature higher than the crosslinking temperature T1 of the coating film 14.

In addition, in the embodiment of the method for recycling the cylindrical body 12, in the separation process, only the end portion 12c of the cylindrical body 12 of the photoconductor drum 10 is heated by electromagnetic induction using a heating device 70.

In the separation process, if the flange 18 is heated using a contact heater, hot air heater, or the like to heat and soften the bonding material 17, and heat is transferred to the bonding material 17 via the heated flange 18, the flange 18 will also be heated before the bonding material 17 softens. In other words, when a contact heater, hot air heater, or the like is used, energy is consumed to heat the flange 18, and the heating time is long.

On the other hand, in the method for recycling the cylindrical body 12 of the embodiment, only the end portion 12c of the metallic cylindrical body 12 is heated by electromagnetic induction, so the flange 18 is not heated by the heating for softening the bonding material 17. Therefore, the method for recycling the cylindrical body 12 of the embodiment can soften the bonding material 17 in a short time compared to the case where the flange 18 is heated to soften the bonding material 17. Furthermore, the method for recycling the cylindrical body 12 of the embodiment can achieve energy savings in softening the bonding material 17 compared to the configuration where the flange 18 is heated to soften the bonding material 17.

In addition, in the embodiment of the method for recycling the cylindrical body 12, in the separation process, the end 12c of the cylindrical body 12 is electromagnetically heated using a coil 72a whose axial length is longer than the length L of the protruding portion 18c of the flange 18.

When using a coil whose axial length is shorter than length L for electromagnetic induction heating of end 12c of cylinder 12, it is not possible to heat the entire area around protrusion 18c in one heating run. To use this coil to electromagnetically heat end 12c of cylinder 12 and soften joining material 17, it is necessary to move cylinder 12 with gripping device 60 and apply electromagnetic induction heating while changing the area of cylinder 12 that is surrounded by the coil.

On the other hand, the method for recycling the cylindrical body 12 of the embodiment uses a coil 72a whose axial length is longer than the length L, so that the insertion of the end portion 12c into the coil 72a to soften the joining material 17 and the electromagnetic induction heating by the coil 72a can each be done in a single operation. Therefore, the method for recycling the cylindrical body 12 of the embodiment can soften the joining material 17 around the protruding portion 18c in a short time compared to when the length of the coil is shorter than the length of the joining portion.

In addition, in the method for recycling the cylindrical body 12 of the embodiment, in the separation process, the insertion amount of the end 12c of the cylindrical body 12 into the coil 72a is adjusted, and then the end 12c is heated by electromagnetic induction. Therefore, the method for recycling the cylindrical body 12 of the embodiment can use the same coil 72a to heat the ends of various cylindrical bodies that have different dimensions of the joint with the support from the cylindrical body 12 of the embodiment.

In addition, in the regeneration method of the cylindrical body 12 of the embodiment, the insertion amount of the cylindrical body 12 into the coil 72a is adjusted and limited in the separation process. In a configuration in which the length of the coil 72a is longer than the length L of the joint, in the comparative method in which the cylindrical body 12 is inserted into the coil 72a by the length of the coil 72a, the end portion including the end 12a of the cylindrical body 12 is heated by the length of the coil 72a. In contrast, in the regeneration method of the cylindrical body 12 of the embodiment, the insertion amount of the cylindrical body 12 into the coil 72a is adjusted and limited, so that the heating range in the cylindrical body 12 is narrower than that in the comparative method, and the cooling time of the heated cylindrical body 12 can be shortened. More specifically, in the regeneration method of the cylindrical body 12 of the embodiment, the insertion amount of the end 12c into the coil 72a is adjusted so that the part of the cylindrical body 12 whose distance to the end face on the heating device 70 side exceeds at least 1.5 times the length L is positioned outside the effective range of electromagnetic induction heating. Therefore, the method for regenerating the cylindrical body 12 of the embodiment can shorten the cooling time of the heated cylindrical body 12 compared to the case where the portion whose distance to the end face on the heating device 70 side is at least 1.5 times the length L is located within the effective range of electromagnetic induction heating.

In addition, the manufacturing method of the photoconductor drum 10 of the embodiment can manufacture the photoconductor drum 10 using the cylinder 12 regenerated by the regeneration method of the cylinder 12 of the embodiment.

The recycling device 20 of the embodiment has a configuration in which the gripping device 60 has a base 64b. Therefore, the recycling device 20 of the embodiment can use the base 64b to change the orientation of the photosensitive drum 10 gripped by the gripping portion 62 relative to the heating device 70, thereby allowing the heating device 70 to heat both ends 12c of the photosensitive drum 10 by electromagnetic induction heating. Therefore, the recycling device 20 of the embodiment can be constructed at a lower cost than a configuration in which the heating devices 70 are arranged on both sides of the longitudinal direction of the photosensitive drum 10 to simultaneously heat both ends of the cylinder 12 by electromagnetic induction heating.

The recycling device 20 of the embodiment has a configuration in which the gripping device 60 has a base 64b, and a single pull-out device 80 is used to separate the pair of flanges 18 one by one from one end 12c of the cylindrical body 12. Therefore, the recycling device 20 of the embodiment can be constructed at a lower cost than a configuration in which the pull-out devices 80 are arranged on both sides of the photosensitive drum 10 in the longitudinal direction to simultaneously separate the pair of flanges 18.

As mentioned above, a specific embodiment of the present invention has been described in detail, but the present invention is not limited to the above embodiment, and various modifications, changes, and improvements are possible within the scope of the technical concept of the present invention.

For example, the flange 18 in the embodiment has a cylindrical main body 18a and a protruding portion 18c. However, the support of the photoconductor drum 10 according to the present invention is not limited to this shape. For example, the support according to the present invention may have a shape in which protruding portions are formed from both end faces of the cylindrical main body.

In the embodiment, the method for regenerating the cylindrical body 12 involves heating only the end portion 12c of the cylindrical body 12 in the separation process. However, in the method for regenerating the cylindrical body 12 according to the present invention, the entire cylindrical body 12 or the flange 18 may be heated using a contact heater, a hot air heater, or the like, as long as the cylindrical body 12 can be heated at a temperature lower than the crosslinking temperature T1 and the melting point T3 and equal to or higher than the softening point T2.

In addition, in the embodiment, the method for regenerating the cylindrical body 12 uses a coil 72a whose axial length is longer than the length L of the protruding portion 18c of the flange 18 in the separation process to electromagnetically heat the end 12c of the cylindrical body 12. However, in the method for regenerating the cylindrical body 12 according to the present invention, the axial length of the coil 72a may be shorter than the length L as long as the end 12c of the cylindrical body 12 can be heated at a temperature lower than the crosslinking temperature T1 and the melting point T3 and equal to or higher than the softening point T2. If the axial length of the coil 72a is shorter than the length L, the joining material 17 may be softened by electromagnetically heating the cylindrical body 12 while changing the part of the cylindrical body 12 surrounded by the coil 72a by moving the cylindrical body 12. As a result, the present invention can regenerate cylindrical bodies from photosensitive drums of various sizes.

In addition, in the embodiment, the method for recycling the cylindrical body 12 includes adjusting the insertion amount of the end 12c of the cylindrical body 12 into the coil 72a in the separation process, and then heating the end 12c through electromagnetic induction. However, the method for recycling the cylindrical body 12 according to the present invention is not limited to adjusting the insertion amount of the end 12c of the cylindrical body 12 into the coil 72a. For example, in the method for recycling the cylindrical body 12 according to the present invention, in the electromagnetic induction heating of the end 12c of the cylindrical body 12, the coil of the heating device 70 may be replaced with one having appropriate dimensions to match the dimensions of the cylindrical body (photoconductor drum) to be recycled.

The regenerating device 20 in the embodiment has a configuration that changes the orientation of the photosensitive drum 10 with the base 64b held by the gripping portion 62 relative to the heating device 70. However, the regenerating device according to the present invention is not limited to a configuration that changes the orientation of the photosensitive drum 10 with the base 64b held by the gripping portion 62 relative to the heating device 70. For example, the regenerating device according to the present invention may have a configuration in which the heating devices 70 are arranged on both sides of the longitudinal direction of the photosensitive drum 10, thereby simultaneously heating both ends of the cylindrical body 12 by electromagnetic induction. The regenerating device according to the present invention may also have a configuration in which the pulling devices 80 are arranged on both sides of the longitudinal direction of the photosensitive drum 10, thereby simultaneously separating a pair of flanges 18.

The separation means of the regenerating device 20 in the embodiment is configured by the extracting device 80 and the gripping device 60. However, the separation means in the present invention is not limited to being configured by the extracting device 80 and the gripping device 60. The separation means in the present invention may be, for example, the extracting device 80 having a reciprocating means for reciprocating the gripping portion 88 in the device width direction. In this case, the extracting device 80 separates the flange 18 from the cylindrical body 12 by moving the gripping portion 88 that grips the flange 18 in a direction away from the cylindrical body 12 using the reciprocating means.

In addition, the extraction device 80 in the embodiment is equipped with a rotation means 84. However, the extraction device 80 in the present invention may be configured not to include the rotation means 84.

In addition, the recycling device 20 in the embodiment is equipped with an extrusion device 90. However, the recycling device according to the present invention is not limited to being equipped with an extrusion device 90. In particular, when the photosensitive drum does not have an insertion member 16, the recycling device may not be equipped with an extrusion device 90. In this case, the extrusion process is omitted from the recycling method for the cylindrical body 12 according to the present invention.

In addition, the regenerating device 20 in the embodiment is equipped with an inspection device 30 that inspects the cylinder 12 regenerated by the regenerating device 20. However, the regenerating device in the present invention is not limited to a configuration that includes an inspection device 30. For example, the regenerating device in the present invention may not include the inspection device 30, and may be configured such that a user (not shown) inspects the regenerated cylinder 12 visually, etc., instead of the inspection device 30.

In addition, the recycling device 20 in the embodiment is equipped with a transport device (not shown) that transports the workpiece between the separation device 50, the peeling device 40, and the inspection device 30. However, the recycling device in the present invention is not limited to a configuration that includes a transport device (not shown). For example, the recycling device in the present invention may not include a transport device (not shown), and a user (not shown) may transport the workpiece using a cart or the like instead of the transport device (not shown).

10 Photoconductor drum (an example of a rotating body)
12 Cylinder 12a Outer circumferential surface 12b Inner circumferential surface 12c End 14 Coating film 17 Bonding material 18 Flange (an example of a support)
18c Protrusion (an example of a joint)
20 Cylindrical body regeneration device 60 Grip device (an example of a gripping means)
64b Base portion (an example of a rotating portion)
70 Heating device (an example of a heating means)
80 Extraction device (an example of a separation means)
T1 Crosslinking temperature T2 Softening point T3 Melting point

Claims (8)

A step of preparing a metallic cylindrical body having an outer peripheral surface on which a coating film mainly made of a thermosetting resin is formed, and a pair of supports mainly made of a thermoplastic resin joined to both ends of an inner peripheral surface via a joining material;
a step of gripping the axial center of the cylindrical body through the coating film, heating both axial ends of the cylindrical body at a temperature lower than the crosslinking temperature of the coating film and the melting point of the support and equal to or higher than the softening point of the bonding material, and moving the pair of supports toward the outside of the cylindrical body in the axial direction to separate the pair of supports from the cylindrical body;
a step of gripping the inner circumferential surface and spraying a high-pressure liquid onto the coating film to peel off the coating film;
A method for recycling a cylindrical body having the above structure. The method for recycling a cylinder according to claim 1, wherein the step of separating the pair of supports from the cylinder involves electromagnetic induction heating only at the ends of the cylinder. The method for recycling a cylinder according to claim 2, wherein the step of separating the pair of supports from the cylinder involves electromagnetic induction heating of the ends using a coil that surrounds the ends of the cylinder and has a length in the axial direction that is longer than the length of the joint between the inner circumferential surface and the supports in the axial direction of the cylinder. The method for recycling a cylinder according to claim 3, wherein the step of separating the pair of supports from the cylinder includes adjusting the insertion amount of the ends into the coil and then heating the ends by electromagnetic induction. forming another coating film on the outer peripheral surface of the cylindrical body regenerated by the regeneration method according to any one of claims 1 to 4;
a step of bonding a support to both ends of the inner circumferential surface of the cylindrical body on which the other coating film is formed, using a bonding material;
A manufacturing method of a rotating body having the above structure. a gripping means for gripping, via the coating film, a central portion in an axial direction of a metallic cylinder having an outer peripheral surface on which a coating film mainly made of a thermosetting resin is formed and a pair of supports mainly made of a thermoplastic resin joined via a bonding material to both ends of an inner peripheral surface of the metallic cylinder;
a heating means for electromagnetically inductively heating both axial ends of the cylindrical body held by the holding means at a temperature lower than the crosslinking temperature of the coating film and the melting point of the support and equal to or higher than the softening point of the bonding material;
a separating means for moving the pair of supports toward the outside in the axial direction of the cylindrical body to separate the pair of supports from the cylindrical body gripped by the gripping means;
a peeling means for gripping the inner circumferential surface and spraying a high-pressure liquid onto the coating film to peel off the coating film;
A cylindrical body regenerating device comprising: the heating means heats one end of the cylindrical body held by the holding means by electromagnetic induction,
The cylindrical body regenerating device according to claim 6 , wherein the gripping means includes a rotating part that changes the orientation of the cylindrical body relative to the heating means. The cylindrical body regeneration device according to claim 7, wherein the separation means separates the support from one end of the cylindrical body gripped by the gripping means toward the outside in the axial direction of the cylindrical body.