Carbon fiber bundle regeneration method and carbon fiber bundle regeneration device

Abstract

A method for regenerating a carbon fiber bundle from a structure having a hollow base material, and a carbon fiber-reinforced resin layer containing a matrix resin and a carbon fiber bundle wound around the hollow base material, and having an opening formed in at least one end in the longitudinal direction, the method comprising: a suspension step for suspending the hollow base material and the carbon fiber-reinforced resin layer in the longitudinal direction; fixing an end portion, which is disposed on the upper side in the vertical direction and in which the opening is formed, to suspend the structure without blocking the opening; a first heating step for heating the suspended structure to decompose the matrix resin; an unwinding step for unwinding, from the carbon fiber-reinforced resin layer in which the matrix resin has been decomposed, the intermediate carbon fiber bundle to which the decomposition residue of the matrix resin has adhered; a second heating step for heating the unwound intermediate carbon fiber bundle to decompose the decomposition residue of the matrix resin to obtain a regenerated carbon fiber bundle; and a winding step for winding the regenerated carbon fiber bundle.

Description

Technical Field

[0001] The present invention relates to a carbon fiber bundle regeneration method and a carbon fiber bundle regeneration device. Background Art

[0002] In recent years, we have been actively working to significantly reduce waste generation through waste prevention, reduction, recycling, and reuse. To achieve this goal, we are conducting research and development related to methods for recovering carbon fibers from carbon fiber reinforced resins.

[0003] Patent Document 1 describes a tank recovery device comprising: an inner liner serving as an inner shell; a reinforcement layer formed by covering the inner liner with a carbon fiber-reinforced plastic containing carbon fibers and a matrix component; and openings provided at both ends of the inner liner. The tank recovery device comprises: a carbonization retort furnace having a carbonization retort chamber for storing the tanks, a heating chamber surrounding the carbonization retort chamber, and a combustion chamber for heating the heating chamber containing the carbonization retort chamber; and a frame for storing the tanks, with a suspension member attached to the upper opening of the tank. The frame further comprises: a plurality of column members longer than the tanks; and a truss member mounted on the column members and engaging the suspension member.

[0004] [Prior Art Literature]

[0005] (Patent Document)

[0006] Patent Document 1: International Publication No. 2020 / 179915 Summary of the Invention

[0007] [Problems to be solved by the invention]

[0008] In this case, when the liner is made of resin, the canister recovery device disclosed in Patent Document 1 is considered. However, a hanger is attached to the opening at the upper end of the canister, obstructing the opening. This inhibits the inflow of water vapor through the opening at the upper end of the canister, making it difficult to dry out the resin that constitutes the liner. Furthermore, it inhibits the outflow of gases generated by the resin dry out through the opening at the upper end of the canister, resulting in a prolonged dry out time.

[0009] An object of the present invention is to provide a carbon fiber bundle regeneration method and a carbon fiber bundle regeneration device capable of shortening the heating time of a structure.

[0010] [Technical means to solve the problem]

[0011] [1] A method for regenerating a carbon fiber bundle is a method for regenerating a carbon fiber bundle from a structure, wherein the structure has a hollow substrate and a carbon fiber reinforced resin layer comprising a carbon fiber bundle and a matrix resin wound around the hollow substrate, and an opening is formed at at least one end in the longitudinal direction, the method comprising: a hanging step of hanging the structure by fixing the end without blocking the opening, the end being arranged on the upper side in the vertical direction and having the opening formed therein; a first heating step of heating the hung structure to decompose the matrix resin; an unwinding step of unwinding an intermediate carbon fiber bundle to which decomposition residues of the matrix resin are attached from the carbon fiber reinforced resin layer in which the matrix resin has been decomposed; a second heating step of heating the unwound intermediate carbon fiber bundle to decompose the decomposition residues of the matrix resin to obtain a regenerated carbon fiber bundle; and a winding step of winding the regenerated carbon fiber bundle.

[0012] [2] The method for regenerating a carbon fiber bundle according to [1], wherein the hollow base material contains a resin.

[0013] [3] The method for regenerating a carbon fiber bundle according to [1] or [2], wherein the suspended structure is heated in an oxygen-containing atmosphere.

[0014] [4] The method for regenerating a carbon fiber bundle according to any one of [1] to [3], wherein a plurality of the aforementioned structures are suspended, and the plurality of suspended structures are heated.

[0015] [5] A carbon fiber bundle regeneration device is a device for regenerating carbon fiber bundles from a structure, wherein the structure has a hollow substrate and a carbon fiber reinforced resin layer comprising a carbon fiber bundle and a matrix resin wound on the aforementioned hollow substrate, and an opening is formed at at least one end in the long side direction, the carbon fiber bundle regeneration device comprising: a hanging portion for fixing the end portion to suspend the aforementioned structure without blocking the aforementioned opening, the end portion being arranged on the upper side in the vertical direction and forming the aforementioned opening; a first heating portion for heating the structure fixed by the aforementioned hanging portion to decompose the aforementioned matrix resin; an unwinding portion for unwinding an intermediate carbon fiber bundle to which decomposition residues of the aforementioned matrix resin are attached from the carbon fiber reinforced resin layer in which the aforementioned matrix resin has been decomposed; a second heating portion for heating the aforementioned unwound intermediate carbon fiber bundle to decompose the aforementioned decomposition residues of the aforementioned matrix resin to obtain a regenerated carbon fiber bundle; and a winding portion for winding the aforementioned regenerated carbon fiber bundle.

[0016] [6] The carbon fiber bundle regeneration device according to [5], wherein the hanging portion has a jig that clamps the outer peripheral surface of the end portion that is arranged on the upper side in the vertical direction and has the opening.

[0017] [7] The carbon fiber bundle regeneration device according to [6], wherein the hanging portion hangs a plurality of the structures, and the jig clamps the outer peripheral surfaces of the plurality of structures at the ends where the openings are formed.

[0018] [8] The carbon fiber bundle regeneration device according to [5], wherein the hanging portion has a jig that is screwed into the opening arranged on the upper side in the vertical direction, and the jig is formed with a through hole to avoid blocking the opening.

[0019] [9] The carbon fiber bundle regeneration device according to [8], wherein the hanging portion hangs a plurality of the structures and has a plurality of the jigs.

[0020]

[10] A carbon fiber bundle regeneration device according to any one of [5] to [9], wherein the aforementioned suspension portion further has a plate-like member, the plate-like member is configured to be in contact with the end portion of the aforementioned structure configured on the lower side in the vertical direction, and the aforementioned plate-like member is formed with a through hole.

[0021] (Effects of the Invention)

[0022] According to the present invention, a method for regenerating a carbon fiber bundle and a device for regenerating a carbon fiber bundle capable of shortening the heating time of a structure can be provided. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a cross-sectional view showing an example of a high-pressure hydrogen tank with its cover removed.

[0024] Figure 2 It is a painted hanging Figure 1 A perspective view of an example of a suspension portion of a high-pressure hydrogen tank.

[0025] Figure 3 It is a drawing Figure 2 A three-dimensional diagram of a variation of the suspension portion.

[0026] Figure 4 yes Figure 3 A partially enlarged cross-sectional view of the suspension portion.

[0027] Figure 5 This is a diagram showing an example of a first heating unit used in the first heating step.

[0028] Figure 6 This is a diagram showing an example of an unwinding section used in the unwinding process.

[0029] Figure 7 This is a schematic diagram illustrating an example of a second heating section, a sizing section, and a winding section used in the second heating step, the sizing step, and the winding step. DETAILED DESCRIPTION

[0030] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

[0031] A carbon fiber bundle regeneration method according to one embodiment of the present invention regenerates carbon fiber bundles from a structure comprising a hollow substrate and a carbon fiber-reinforced resin layer comprising a carbon fiber bundle and a matrix resin wound around the hollow substrate, with an opening formed at at least one end in the longitudinal direction. The structure is not particularly limited; examples thereof include known high-pressure hydrogen tanks (Types 2 to 4) with their lids removed.

[0032] The carbon fibers constituting the carbon fiber bundle are not particularly limited, and examples thereof include polyacrylonitrile (PAN)-based carbon fibers and pitch-based carbon fibers. Here, the carbon fibers constituting the carbon fiber bundle are long fibers. The fiber length of the carbon fibers is not particularly limited, and examples thereof include 1 m or longer. The matrix resin is not particularly limited, and examples thereof include cured products of thermosetting resins such as epoxy resins, and thermoplastic resins.

[0033] exist Figure 1 , an example of a high-pressure hydrogen tank with its cover removed is shown.

[0034] A high-pressure hydrogen tank T (hereinafter referred to as a high-pressure hydrogen tank T) with its lid removed comprises a liner L serving as a hollow base material and a carbon fiber-reinforced resin layer F comprising a carbon fiber bundle and a matrix resin wound around the liner L. Openings are formed at longitudinal ends E1 and E2. The material constituting the liner L is not particularly limited; examples include metals such as aluminum and chrome-molybdenum steel, and resins such as polyamide and polyethylene.

[0035] The method for manufacturing the high-pressure hydrogen tank T is not particularly limited, and an example thereof includes a filament winding method.

[0036] A carbon fiber bundle regeneration method according to one embodiment of the present invention includes: a hanging step of suspending a high-pressure hydrogen tank T by fixing an end portion E1 without blocking the opening, the end portion E1 being arranged on the upper side in the vertical direction and having an opening; and a first heating step of heating the suspended high-pressure hydrogen tank T in a first oxygen-containing environment to decompose the matrix resin. Furthermore, the carbon fiber bundle regeneration method according to one embodiment of the present invention also includes an unwinding step of unwinding an intermediate carbon fiber bundle I to which decomposition residues of the matrix resin are attached from a carbon fiber-reinforced resin layer F in which the matrix resin has been decomposed. Furthermore, the carbon fiber bundle regeneration method according to one embodiment of the present invention also includes a second heating step of heating the unwound intermediate carbon fiber bundle I in a second oxygen-containing environment to decompose the decomposition residues of the matrix resin to obtain a regenerated carbon fiber bundle R; and a winding step of winding the regenerated carbon fiber bundle R.

[0037] In this specification and claims, the term "suspended structure" includes not only a state in which the end portion arranged on the vertically lower side of the structure is not in contact with other members, but also a state in which the end portion is in contact with other members.

[0038] During the hanging process, the end E1 is fixed without blocking the opening formed at the end E1. At this time, the high-pressure hydrogen tank T is maintained so that the long side direction of the high-pressure hydrogen tank T is roughly parallel to the vertical direction. Therefore, even when the liner L is made of resin, in the first heating process, oxygen is not suppressed from flowing into the end E1 of the high-pressure hydrogen tank T, so that the resin constituting the liner L is easily thermally decomposed. In addition, the decomposition gas of the resin constituting the liner L is not suppressed from flowing out of the end E1 of the high-pressure hydrogen tank T. As a result, the heating time of the high-pressure hydrogen tank T is shortened. In addition, since the end E2 of the high-pressure hydrogen tank T is not fixed, even if the jig for fixing the end E1 expands linearly due to heating, the strain applied to the high-pressure hydrogen tank T is suppressed.

[0039] Furthermore, during the hanging process, the opening formed at the vertically lower end E2 of the high-pressure hydrogen tank T is not blocked. Therefore, even when the liner L is made of resin, the inflow of oxygen from the end E2 of the high-pressure hydrogen tank T is not inhibited during the first heating process. Furthermore, the outflow of the pyrolysis liquid of the resin constituting the liner L from the end E2 of the high-pressure hydrogen tank T is not inhibited. As a result, the resin constituting the liner L is easily thermally decomposed, and the high-pressure hydrogen tank T is less likely to deform. Furthermore, the matrix resin is thermally decomposed to the same extent throughout the thickness direction of the carbon fiber reinforced resin layer F, thereby making the content of the matrix resin decomposition residue in the intermediate carbon fiber bundle I uniform.

[0040] Here, if the content of the matrix resin decomposition residue in the intermediate carbon fiber bundle 1 is adjusted to a specific range, damage to the intermediate carbon fiber bundle 1 can be suppressed when the intermediate carbon fiber bundle 1, to which the matrix resin decomposition residue adheres, is unwound from the carbon fiber-reinforced resin layer in which the matrix resin has been decomposed. The content of the matrix resin decomposition residue in the intermediate carbon fiber bundle 1 is, for example, 5% by weight or more and 10% by weight or less.

[0041] Alternatively, a plurality of high-pressure hydrogen tanks T may be suspended in the hanging step, and the suspended plurality of high-pressure hydrogen tanks T may be heated in the first heating step.

[0042] Examples of the first heating unit used in the first heating step include a hot air circulation furnace and a gas furnace.

[0043] In the first heating step, the high-pressure hydrogen tank T may be heated by superheated water vapor. In the second heating step, the intermediate carbon fiber bundle I may be heated by superheated water vapor.

[0044] exist Figure 2 , an example of a suspension portion for suspending a high-pressure hydrogen tank T is shown.

[0045] The suspension unit 100 comprises a jig 101 for clamping the outer circumference of the vertically upward end portions E1 of multiple high-pressure hydrogen tanks T, a beam member 102, a truss member 103, and a columnar member 104. The jig 101 comprises a plurality of U-shaped clamping portions 101a and rod-shaped portions 101b disposed on either side of the clamping portions 101a. The rod-shaped portions 101b are secured to the beam member 102 using, for example, bolts and nuts. The beam member 102 is positioned between opposing truss members 103, and the truss member 103 is positioned between adjacent columnar members 104.

[0046] The suspension unit 100 further includes a plate-shaped member 105, which is positioned to face and contact the vertically lower end E2 of the high-pressure hydrogen tank T. The plate-shaped member 105 has a through hole formed therein. The plate-shaped member 105 is supported by the columnar member 104. Furthermore, a tray is positioned below the plate-shaped member 105, into which the pyrolysis liquid of the resin forming the liner L flows.

[0047] The plate-like member 105 is not particularly limited as long as it has through holes that do not inhibit the outflow of the thermal decomposition liquid of the resin constituting the liner L from the end E2 of the high-pressure hydrogen tank T. Examples thereof include wire mesh and punched metal.

[0048] The hanging portion 100 may also include a jig 101 that clamps the outer peripheral surface of the vertically upper end E1 of a single high-pressure hydrogen tank T. Furthermore, the region of the beam-shaped member 102 facing the clamping portion 101a may be U-shaped. Furthermore, the plate-shaped member 105 may be positioned at a specific distance from the vertically lower end E2 of the high-pressure hydrogen tank T.

[0049] exist Figure 3 , a variation of the suspension portion 100 is shown.

[0050] The hanging portion 200 has a jig 201 instead of the jig 101. The jig 201 is screwed into the opening formed by the end E1 of each high-pressure hydrogen tank T arranged on the upper side in the vertical direction. Except that the jig 201 is supported by beam-shaped members 102 and 202, it has the same structure as the hanging portion 100.

[0051] like Figure 4As shown, jig 201 comprises a hollow, disc-shaped base portion 201a and a cylindrical screw-in portion 201b extending from the inner periphery of base portion 201a. A through-hole H is formed in the center. The outer diameter of screw-in portion 201b is approximately the same as the inner diameter of the opening formed at end E1 of the high-pressure hydrogen tank T. Base portion 201a is secured to beam-shaped members 102 and 202 using, for example, bolts and nuts.

[0052] Alternatively, the hanging portion 200 may include a single jig 201. Furthermore, the beam-shaped member 202 may be a movable beam-shaped member that rotates with the beam-shaped member 102 as a fulcrum.

[0053] exist Figure 5 , a heat treatment furnace is shown as an example of a first heating unit used in the first heating step.

[0054] The heat treatment furnace 10 includes a heat treatment chamber 11 and a combustion chamber 12 .

[0055] The heat treatment chamber 11 is a sealed space surrounded by an outer wall 11a and an inner wall 11b. In the figure, burners 11c are installed on the upper portion of the left outer wall 11a and the lower portion of the right outer wall 11a, allowing combustion gas to flow within the inner wall 11b. Therefore, when the gas fuel and air are mixed and burned in the burners 11c, the combustion gas circulates within the inner wall 11b, stabilizing the temperature within the inner wall 11b.

[0056] The heat treatment chamber 11 is provided with a sealed door for accommodating the high-pressure hydrogen tank T suspended by the hanging portion 100 on the outer wall 11a and a portion of the inner wall 11b. Here, the high-pressure hydrogen tank T is placed on the heat insulating material 11d provided in a manner that penetrates the bottom surface of the inner wall 11b. In addition, the weighing sensor 11e, which serves as a mass detection unit, is provided between the bottom surface of the outer wall 11a and the heat insulating material 11d, and detects the mass of the high-pressure hydrogen tank T in real time based on the strain amount. As a result, the heating conditions in the heat treatment chamber 11 are optimized, thereby suppressing the variation in the decomposition amount of the matrix resin caused by individual differences in the material, shape, etc. of the high-pressure hydrogen tank T, and improving the management accuracy. In addition, since the heating time in the heat treatment chamber 11 can also be made not to exceed the necessary time, it helps to shorten the heating time and reduce energy consumption.

[0057] In addition, the mass detection unit may detect in real time the amount of decrease in the mass of the high-pressure hydrogen tank T. Furthermore, the mass detection unit may be omitted as necessary.

[0058] In the figure, decomposition gas of the matrix resin generated in the inner wall 11b is discharged from the exhaust port 11f formed in the upper portion of the inner wall 11b and then introduced into the combustion chamber 12 through the pipe 11g provided through the outer wall 11a.

[0059] The combustion chamber 12 is a sealed space surrounded by an outer wall 12a and an inner wall 12b. In the figure, a burner 12c is installed in the center of the left outer wall 12a of the combustion chamber 12, allowing combustion gases to flow within the inner wall 12b. Meanwhile, a pipe 11g passes through the outer wall 12a, then inside the outer wall 12a, through the inside and outside of the inner wall 12b, ultimately connecting to the upper left portion of the inner wall 12b in the figure. During this process, the decomposed gas of the matrix resin is heated by the combustion gases flowing within the inner wall 12b while passing through the pipe 11g inside the inner wall 12b. It is then introduced from the upper left portion of the inner wall 12b and comes into contact with the combustion gases. Thus, after combustion, the decomposed gas of the matrix resin is discharged to the outside through an exhaust port 12d.

[0060] Furthermore, the heat treatment furnace 10 may further include a pipe for supplying exhaust heat from the combustion chamber 12 to a tubular furnace 40 described below.

[0061] exist Figure 6 In FIG, an example of an unwinding section for an unwinding process is shown. Figure 6 (a) and (b) are the front view and side view, respectively.

[0062] The unwinding section 30 includes a rotating jig 31 that rotatably supports the high-pressure hydrogen tank T1, in which the matrix resin has been decomposed, and a motor 32 that rotates the high-pressure hydrogen tank T1. The rotational power of the motor 32 is transmitted to the rotating jig 31 via a conveyor belt 33. As a result, the intermediate carbon fiber bundle I is unwound via rollers 34, 35, and 36. The roller 34 is positioned so that the intermediate carbon fiber bundle I is unwound to a position further outward from the tangent line of the high-pressure hydrogen tank T1 at the unwinding position of the intermediate carbon fiber bundle I. Furthermore, the rollers 34, 35, and 36 have long axes corresponding to the unwinding of the intermediate carbon fiber bundle I in the longitudinal direction of the high-pressure hydrogen tank T1. Furthermore, a tension adjustment roller 37 is provided to control the unwinding tension to compensate for the difference in the unwinding amount per rotation caused by the hoop winding and helical winding of the intermediate carbon fiber bundle I.

[0063] In addition, a blade may be provided instead of the roller 34 .

[0064] Alternatively, after performing the sizing step of sizing the regenerated carbon fiber bundle R, the sized regenerated carbon fiber bundle R may be unwound.

[0065] exist Figure 7 , an example of a second heating section, a sizing section, and a winding section used in the second heating step, the sizing step, and the winding step is shown.

[0066] The tubular furnace 40, serving as the second heating unit, has insulating covers 42 at both ends of a quartz tube 41. These covers 42 have through-holes formed therein for the passage of the intermediate carbon fiber bundles I, to which the matrix resin decomposition residues adhere. Furthermore, the tubular furnace 40 is provided with a wire heater 43, a heat insulating material 44, and a protective cover 45 in this order at the center of the quartz tube 41. Thus, the wire heater 43 heats the intermediate carbon fiber bundles I, decomposing the matrix resin decomposition residues to obtain regenerated carbon fiber bundles R. This ensures a uniform temperature distribution within the tubular furnace 40, and furthermore, suppresses heating of any portion of the intermediate carbon fiber bundles I.

[0067] The sizing section 50 passes the regenerated carbon fiber bundle R through a sizing liquid 51. At this time, the sizing liquid 51 is heated by a heater 52. In addition, a roller 53 prevents the regenerated carbon fiber bundle R from being excessively coated with the sizing liquid 51.

[0068] Furthermore, a drying furnace may be provided to dry the regenerated carbon fiber bundle R, if necessary.

[0069] The feeding mechanism 60 includes feeding rollers 61, 62, and 63. The linear velocity of the regenerated carbon fiber bundle R is controlled to a linear velocity that is easily manageable in terms of process by utilizing friction between the feeding rollers 61, 62, and 63 and the regenerated carbon fiber bundle R.

[0070] The winding unit 70 includes a winding motor 71 for winding the regenerated carbon fiber bundle R onto the paper core P, and a slide roller 72 for transversely winding the regenerated carbon fiber bundle R. The winding tension of the regenerated carbon fiber bundle R is controlled by controlling the torque of the winding motor 71 .

[0071] As mentioned above, although embodiment of this invention was demonstrated, this invention is not limited to the said embodiment, The said embodiment can also be modified suitably within the range of the summary of this invention.

[0072] Reference numerals

[0073] 100,200 suspension department

[0074] 101,201 fixtures

[0075] 101a Clamping part

[0076] 101b rod-shaped portion

[0077] 102,202 beam-like components

[0078] 103 truss members

[0079] 104 columnar components

[0080] 201a base material part

[0081] 201b screw-in part

[0082] E1, E2 end

[0083] F Carbon fiber reinforced resin layer

[0084] H through hole

[0085] I Intermediate carbon fiber bundle

[0086] L lining

[0087] R recycled carbon fiber bundle

[0088] T,T1 high pressure hydrogen tank

Claims

1. A method for regenerating a carbon fiber bundle from a structure comprising: a hollow substrate; and a carbon fiber-reinforced resin layer comprising the carbon fiber bundle and a matrix resin wound around the hollow substrate; and an opening formed at at least one end in a longitudinal direction of the structure, the method comprising: a hanging step of suspending the structure by fixing the end portion without blocking the opening, the end portion being arranged on the upper side in the vertical direction and having the opening formed therein; a first heating step of heating the suspended structure to decompose the matrix resin; an unwinding step of unwinding an intermediate carbon fiber bundle to which decomposition residues of the matrix resin are attached, from the carbon fiber reinforced resin layer in which the matrix resin has been decomposed; a second heating step of heating the unwound intermediate carbon fiber bundle to decompose the decomposition residue of the matrix resin to obtain a regenerated carbon fiber bundle; and, The winding step is to wind the regenerated carbon fiber bundle.

2. The method for regenerating a carbon fiber bundle according to claim 1, wherein: The hollow base material comprises a resin.

3. The method for regenerating a carbon fiber bundle according to claim 1 or 2, wherein: The suspended structure is heated in an oxygen-containing environment.

4. The method for regenerating a carbon fiber bundle according to claim 1 or 2, wherein: Suspending a plurality of the aforementioned structures, The plurality of suspended structures are heated.

5. A carbon fiber bundle regeneration device for regenerating a carbon fiber bundle from a structure, the structure comprising a hollow base material and a carbon fiber-reinforced resin layer comprising a carbon fiber bundle and a matrix resin wound around the hollow base material, the structure having an opening formed at at least one end in a longitudinal direction, the carbon fiber bundle regeneration device comprising: a hanging portion for suspending the structure by fixing an end portion without blocking the opening, the end portion being arranged on the upper side in the vertical direction and having the opening formed therein; a first heating unit for heating the structure fixed by the hanging unit to decompose the matrix resin; an unwinding section for unwinding an intermediate carbon fiber bundle to which decomposition residues of the matrix resin are attached, from the carbon fiber reinforced resin layer in which the matrix resin has been decomposed; a second heating section for heating the unwound intermediate carbon fiber bundle to decompose the decomposition residue of the matrix resin to obtain a regenerated carbon fiber bundle; and, The winding section winds up the regenerated carbon fiber bundle.

6. The carbon fiber bundle regeneration device according to claim 5, wherein: The hanging portion includes a jig that clamps the outer peripheral surface of the end portion that is arranged on the upper side in the vertical direction and has an opening.

7. The carbon fiber bundle regeneration device according to claim 6, wherein: The aforementioned hanging part hangs a plurality of the aforementioned structures, The jig clamps outer peripheral surfaces of the plurality of structures at the ends where the openings are formed.

8. The carbon fiber bundle regeneration device according to claim 5, wherein: The aforementioned hanging portion has a jig, and the jig is screwed into the opening arranged on the upper side in the aforementioned vertical direction. The jig is formed with a through hole to avoid blocking the opening.

9. The carbon fiber bundle regeneration device according to claim 8, wherein: The hanging portion hangs a plurality of the structures and has a plurality of the jigs.

10. The carbon fiber bundle regeneration device according to any one of claims 5 to 9, wherein: The aforementioned hanging portion further includes a plate-shaped member, and the plate-shaped member is arranged to face and contact with the end portion of the aforementioned structure arranged on the lower side in the vertical direction. The plate-like member is formed with a through hole.

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