Thermal treatment device

Abstract

To improve cleanliness of a treatment space.SOLUTION: A heat treatment device 10 according to the present invention includes a conveying device 20, an unwinding section 30, a heat treatment section 90, and a winding section 60. The conveying device 20 conveys a strip-shaped workpiece A. The unwinding section 30 unwinds a workpiece A. The heat treatment section 90 has an internal treatment space where the unwound workpiece A is heat-treated. The winding section 60 winds up the treated workpiece A. At least one of the unwinding section 30 and the winding section 60 includes a pair of holding sections 34, 36 and a pair of support sections 40, 50. The pair of holding sections 34, 36 hold a core A2 of a roll A1 around which the workpiece A is wound, from both axial sides. The pair of support sections 40, 50 receive the ends A21, A22 of the core A2 held by the pair of holding sections 34, 36 below the ends A21, A22 of the core A2, respectively.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present disclosure relates to a heat treatment apparatus.

Background Art

[0002] Japanese Patent No. 7285360 discloses a heat treatment apparatus including an unwinding unit, a heat treatment unit, a cooling unit, and a winding unit. From the unwinding unit, a strip-shaped sheet before heat treatment is unwound. In the heat treatment unit, the sheet is heat-treated while being conveyed. In the cooling unit, the sheet heat-treated in the heat treatment unit is cooled while being conveyed. In the winding unit, the strip-shaped sheet cooled in the cooling unit is wound up. In the unwinding unit and the winding unit, the unwinding roll for unwinding the strip-shaped object to be processed and the winding roll for winding up the sheet-shaped object to be processed are appropriately replaced.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, the inventor of the present invention wants to improve the workability of roll replacement.

Means for Solving the Problems

[0005] The heat treatment apparatus disclosed herein includes a conveying device, an unwinding unit, a heat treatment unit, and a winding unit. The conveying device conveys a strip-shaped workpiece. The unwinding unit unwinds the workpiece. In the heat treatment unit, the unwound workpiece is heat-treated while being conveyed along a predetermined conveying path. The winding unit winds up the processed workpiece. At least one of the unwinding unit and the winding unit includes a pair of holding parts and a pair of support parts. The pair of holding parts holds the core of the roll around which the workpiece is wound from both axial sides. The pair of support parts receives the end portions of the core below both end portions of the core held by the pair of holding parts. In such a heat treatment apparatus, the workability of roll replacement is good.

Brief Description of the Drawings

[0006]

Figure 1

Figure 2

Figure 3

Figure 4

Embodiments for Carrying Out the Invention

[0007] Hereinafter, one of the embodiments in the present disclosure will be described in detail with reference to the drawings. In the following drawings, members and parts having the same function are denoted by the same reference numerals. Also, the dimensional relationships (length, width, thickness, etc.) in each figure do not reflect the actual dimensional relationships. The directions of up, down, left, right, front, and rear are represented by the arrows U, D, L, R, F, and Rr in the figure, respectively. Here, the directions of up, down, left, right, front, and rear are merely defined for convenience of explanation and do not limit the present invention unless otherwise particularly mentioned.

[0008] 〈Heat Treatment Apparatus 10〉 FIG. 1 is a schematic diagram showing a heat treatment apparatus 10. The heat treatment apparatus 10 is equipment for heat-treating a strip-shaped (sheet-shaped) workpiece A. In this embodiment, the heat treatment apparatus 10 is a device for continuously drying a strip-shaped workpiece while conveying it in a so-called roll-to-roll manner. The workpiece A is not particularly limited as long as it is strip-shaped, such as, for example, an electrode sheet of a secondary battery in which electrode materials are coated on both sides of a sheet substrate, a flexible copper-clad laminate FCCL (Flexible Cupper Clad Laminate), a polyimide sheet, or the like. The heat treatment apparatus 10 can be used for treating various strip-shaped (sheet-shaped) workpieces.

[0009] As shown in FIG. 1, the heat treatment apparatus 10 includes an unwinding unit 30, a heat treatment unit 90, and a winding unit 60. In this embodiment, the heat treatment apparatus 10 further includes a driving device 100. Further, the heat treatment apparatus 10 includes a cooling unit 95 between the heat treatment unit 90 and the winding unit 60. The strip-shaped workpiece A is processed while being conveyed in the order of the unwinding unit 30, the heat treatment unit 90, the cooling unit 95, and the winding unit 60. The workpiece A is unwound from an unwinding roll A1 provided in the unwinding unit 30, heat-treated in the heat treatment unit 90, cooled in the cooling unit 95, and then wound around a winding roll A6 provided in the winding unit 60.

[0010] 〈Conveying devices 20, 22〉 The conveying devices 20 and 22 are devices for conveying the workpiece A. The workpiece A is conveyed along a predetermined conveying path. The conveying devices 20 and 22 are respectively devices for rotationally driving the unwinding shaft 32 to which the unwinding roll A1 of the unwinding section 30 is attached, and the winding shaft 62 to which the winding roll A6 of the winding section 60 is attached. The conveying devices 20 and 22 can be composed of devices for controlling the conveyance of the workpiece A. As the conveying devices 20 and 22, for example, a motor and an inverter may be used, or a servo motor or the like may be used. Further, the conveying devices 20 and 22 may include a device for controlling the tension applied to the workpiece A. As the device for controlling the tension, for example, a powder clutch can be used. The conveying devices 20 and 22 may be realized by a set of devices in which a device for controlling the conveying speed and a device for controlling the tension cooperate with each other.

[0011] The unwinding shaft 32 is connected to the conveying device 20. The unwinding shaft 32 is rotationally driven by the conveying device 20, and the workpiece A is unwound from the unwinding roll A1. The winding shaft 62 is connected to the conveying device 22. The winding shaft 62 is rotationally driven by the conveying device 22, and the workpiece A is wound around the winding roll A6. The conveying devices 20 and 22 may be installed in an air box provided in a space surrounded by the outer walls 31 and 61, respectively.

[0012] The heat treatment device 10 can be configured to be able to convey the workpiece A at a high speed in order to improve the processing efficiency of the workpiece A. Although not particularly limited, the conveying speed of the workpiece A can be set to about 1 m / min to 200 m / min. In this embodiment, the conveying speed of the workpiece A is set to about 100 m / min. In the heat treatment device 10, the conveying speed of the workpiece A is controlled by a control device (not shown).

[0013] The control device controls the conveyance speed of the object to be processed A, the tension applied to the object to be processed A, etc. so that the object to be processed A is conveyed according to predetermined conveyance conditions. The control device controls the unwinding tension when unwinding the object to be processed A, the in-furnace tension applied to the object to be processed A being processed, and the winding tension when winding up the processed object to be processed A, respectively. The control device is connected to the conveyance devices 20 and 22. Further, the control device may be connected to a tension detection roller 35b, a feed roller 35c, a dancer roller 35d, a tension detection roller 65c, etc. The control device feeds back the unwinding tension detected by the tension detection roller 35b to the conveyance device 20 and controls the torque of the unwinding shaft 32. Thereby, the unwinding tension is adjusted. Also, the control device feeds back the in-furnace tension detected by the tension detection roller 35b to which the object to be processed A being processed is applied to the dancer roller 35d. The dancer roller 35d moves according to the detected in-furnace tension. Thereby, the in-furnace tension is adjusted. Note that the rotation speed of the feed roller 35c is controlled so that the position of the dancer roller 35d returns to the reference position in a state where the in-furnace tension is constant. Further, the control device feeds back the winding tension detected by the tension detection roller 65c to the conveyance device 22 and controls the torque of the winding shaft 62. Thereby, the winding tension is adjusted.

[0014] 〈Unwinding section 30〉 The unwinding section 30 is a facility for unwinding the object to be processed A. The unwinding section 30 houses an unwinding roll A1 in a state where the object to be processed A before heat treatment is wound around it. The unwinding section 30 has an outer wall 31 that surrounds the internal facilities and the unwinding roll A1. An unwinding shaft 32 and a plurality of rollers 35 are provided inside the unwinding section 30. In this embodiment, when the unwinding shaft 32 is rotationally driven, the object to be processed A is unwound from the unwinding roll A1 attached to the unwinding shaft 32.

[0015] Within the space surrounded by the outer wall 31 of the unwinding section 30, a plurality of rollers 35 for setting the conveyance path of the object to be processed A are provided. The object to be processed A unwound from the unwinding roll A1 is looped around the plurality of rollers 35 in a predetermined order and conveyed toward the heat treatment section 90. The plurality of rollers 35 includes a guide roller 35a, a tension detection roller 35b, a feed roller 35c, and a dancer roller 35d. The tension detection roller 35b is a roller for detecting the tension applied to the object to be processed A. A tension detector (not shown) is attached to the tension detection roller 35b. The dancer roller 35d is configured to be movable within a predetermined range. By moving the dancer roller 35d, the tension of the object to be processed A is adjusted. The feed roller 35c is rotationally driven by a drive device (not shown). By controlling the rotation of the feed roller 35c, the position of the dancer roller 35d is adjusted.

[0016] 〈Heat Treatment Section 90〉 The heat treatment section 90 is a facility where the strip-shaped object to be processed A is heat-treated while being conveyed. The heat treatment section 90 is connected to the unwinding section 30 via the connecting section 70. The connecting section 70 is provided with an outlet of the unwinding section 30 and an inlet of the heat treatment section 90.

[0017] Although detailed illustration is omitted, the heat treatment section 90 may include a furnace body (outer wall) 91, a heater, and guide rollers. In the heat treatment section 90, the unwound object to be processed A is heat-treated while being conveyed along a predetermined conveyance path. The heat treatment section 90 has a processing space inside where the unwound object to be processed A is heat-treated while being conveyed. The furnace body 91 surrounds the processing space where the heater and the guide rollers are arranged.

[0018] The conveyance path along which the object to be processed A is conveyed is set by guide rollers. The guide rollers are configured to rotate passively as the object to be processed A is conveyed.

[0019] The heater is a facility for heating the object to be processed A. The object to be processed A is heat-treated by the heater while being conveyed along a conveyance path set by the guide roller. Note that the configuration of the heat treatment unit 90 such as the guide roller and the heater is not particularly limited. The heat-treated object to be processed A is carried out toward the cooling unit 95.

[0020] 〈Cooling Unit 95〉 The cooling unit 95 is a facility where the object to be processed A heat-treated in the heat treatment unit 90 is cooled while being conveyed. The cooling unit 95 is connected to the heat treatment unit 90 via the connecting portion 72. The connecting portion 72 is provided with an outlet of the heat treatment unit 90 and an inlet of the cooling unit 95.

[0021] Although detailed illustration is omitted, the cooling unit 95 may include a cooling roller, a plurality of guide rollers, and an outer wall 96. A plurality of cooling rollers may be provided in the cooling unit 95. The outer wall 96 surrounds a processing space in which a plurality of cooling rollers and a plurality of guide rollers are arranged. The plurality of cooling rollers and the plurality of guide rollers set a conveyance path along which the object to be processed A is conveyed in the cooling unit 95.

[0022] The cooling roller is a roller configured such that a refrigerant circulates inside. The object to be processed A is cooled by contacting the surface of the cooling roller. A drive device (not shown) may be connected to the cooling roller. The cooling roller can rotate in accordance with a set conveyance speed along the conveyance direction.

[0023] In this embodiment, the object to be processed A is cooled to about room temperature in the cooling unit 95. The temperature of the object to be processed A to be cooled is not particularly limited. Note that the configuration of the cooling unit 95 such as the guide roller and the cooling roller is not particularly limited.

[0024] The cooled object to be processed A is conveyed to the winding unit 60 through the connecting portion 74. Note that the cooling unit 95 does not necessarily have to be provided in the heat treatment apparatus 10.

[0025] 〈Winding Unit 60〉 The winding unit 60 is a facility for winding the processed object A. The winding unit 60 houses a winding roll A6 for winding the processed object A cooled through a cooling roller. The winding unit 60 has an outer wall 61 surrounding the internal facilities and the winding roll A6. The winding unit 60 is provided with a winding shaft 62 and a plurality of rollers 65. When the winding shaft 62 is rotationally driven, the processed object A is wound onto the winding roll A6.

[0026] Inside the space surrounded by the outer wall 61 of the winding unit 60, a plurality of rollers 65 for setting the conveyance path of the processed object A are provided. The plurality of rollers 65 set the conveyance path along which the processed object A is conveyed in the winding unit 60. The processed object A conveyed from the cooling unit 95 is hung on the roller 65 near the entrance (connection part 74) of the winding unit 60 and then looped around the plurality of rollers 65 in a predetermined order and wound onto the winding roll A6. The plurality of rollers 65 includes a guide roller 65a, a dancer roller 65b, a tension detection roller 65c, and a feed roller 65d. The dancer roller 65b is configured to be movable within a predetermined range. The dancer roller 65b can be moved, for example, when the winding roll A6 is replaced to ensure the necessary slack of the processed object A. A tension detector (not shown) is attached to the tension detection roller 65c. The feed roller 65d feeds out the necessary slack for attachment when attaching the processed object A to the replaced winding roll A6 when the winding roll A6 is replaced.

[0027] 〈Vacuum pump 80〉 The heat treatment apparatus 10 is equipped with a vacuum pump 80. The internal spaces of the unwinding section 30, the heat treatment section 90, the cooling section 95, and the winding section 60 described above are respectively surrounded by outer walls 31, 91, 96, and 61. Each of the unwinding section 30, the heat treatment section 90, the cooling section 95, and the winding section 60 has a space isolated from the external space by the outer walls 31, 91, 96, and 61. The internal spaces of the outer walls 31, 91, 96, and 61 communicate with each other during the treatment of the workpiece A. The vacuum pump 80 is connected to each of the outer walls 31, 91, 96, and 61. The vacuum pump 80 reduces the pressure in the internal spaces (treatment spaces in the heat treatment section 90 and the cooling section 95) of the unwinding section 30, the heat treatment section 90, the cooling section 95, and the winding section 60. In this embodiment, the workpiece A is treated under a predetermined vacuum atmosphere lower than the atmospheric pressure.

[0028] Note that the connection form of the vacuum pump 80 is not particularly limited. A plurality of vacuum pumps 80 may be provided, and the plurality of vacuum pumps 80 may be respectively connected to each of the unwinding section 30, the heat treatment section 90, the cooling section 95, and the winding section 60. A pipe may branch from one vacuum pump 80, and the interiors of a plurality of sections among the unwinding section 30, the heat treatment section 90, the cooling section 95, and the winding section 60 may be depressurized.

[0029] Vacuum valves 81 to 84 for adjusting the degree of vacuum in each section are provided in the pipes of the vacuum pump 80. The vacuum valves 81 to 84 are configured to be able to switch between connecting each section to the vacuum pump 80 and disconnecting each section from the vacuum pump 80. When the degree of vacuum in each section is not adjusted, on-off valves may be used instead of the vacuum valves 81 to 84.

[0030] When the rolls are replaced in the unwinding section 30 and the winding section 60, they are opened to the atmosphere by an atmosphere release valve (not shown). The atmosphere release valve may also be provided in the heat treatment section 90 and the cooling section 95.

[0031] At the inlet of the heat treatment unit 90 (in this embodiment, the connecting portion 70), a door 70a is provided. The door 70a is closed when replacing the unwinding roll A1 or the like. By closing the door 70a when replacing the unwinding roll A1 or the like, the atmosphere of the heat treatment unit 90 (in this embodiment, a reduced pressure state) can be maintained. The door 70a may be closed when the object to be processed A passes through the connecting portion 70, such as when replacing the unwinding roll A1. When the remaining amount of the object to be processed A wound around the unwinding roll A1 decreases, the unwinding roll A1 is replaced with a new one. The end of the object to be processed A on the replaced unwinding roll A1 and the end of the object to be processed A before replacement are joined together. The unwinding roll A1 can be replaced while maintaining the atmosphere of the heat treatment unit 90 with the object to be processed A left in the processing space, and the recovery of the apparatus after replacing the unwinding roll A1 is accelerated.

[0032] Also, at the outlet of the cooling unit 95 (in this embodiment, the connecting portion 74), a door 74a is provided. Similar to the door 70a, the door 74a can maintain the atmosphere of the cooling unit 95 (in this embodiment, a reduced pressure state) by closing the door 74a when replacing the winding roll A6 or the like. The door 74a may be closed when the object to be processed A passes through the connecting portion 74, such as when replacing the winding roll A6. When the amount of the object to be processed A wound around the winding roll A6 increases, the winding roll A6 is replaced with a new one. The end of the replaced winding roll A6 and the end of the object to be processed A are joined together. The winding roll A6 can be replaced while maintaining the atmosphere of the cooling unit 95 with the object to be processed A left in the processing space, and the recovery of the apparatus after replacing the winding roll A6 is accelerated.

[0033] Note that the heat treatment apparatus 10 is not limited to a vacuum furnace that processes the object to be processed A under a vacuum atmosphere, and may be an atmosphere furnace that processes the object to be processed A in a predetermined atmosphere, or an air furnace that processes the object to be processed under an air environment.

[0034] Incidentally, a heat treatment apparatus that heat-treats a strip-shaped workpiece while conveying it includes a pay-out unit that pays out the workpiece and a take-up unit that takes up the workpiece. The take-up unit houses a pay-out roll before the heat treatment. The workpiece is paid out from the pay-out unit, processed in the heat treatment unit, and then taken up by the take-up unit. The take-up unit houses a take-up roll after the heat treatment. The workpiece moves from the pay-out unit to the take-up unit as the heat treatment progresses. As the workpiece is paid out, the diameter of the pay-out roll gradually decreases, and as the workpiece is taken up, the diameter of the take-up roll gradually increases. When the processing of a predetermined amount of the workpiece is completed, the pay-out roll and the take-up roll are replaced. For example, when the remaining amount of the workpiece wound around the pay-out roll decreases, or when the amount of the workpiece wound around the take-up roll increases, the pay-out roll and the take-up roll are replaced. The replacement of the pay-out roll and the take-up roll may be at the same timing or at different timings. Here, the heavier the weights of the pay-out roll and the take-up roll are, the greater the burden of the roll replacement work can be. Also, there may be a case where the tip of the workpiece paid out from the replaced pay-out roll is connected to the preceding workpiece, and the workpieces paid out from a plurality of pay-out rolls are to be taken up by one take-up roll.

[0035] FIG. 2 is a schematic view showing the pay-out unit 30. In the heat treatment apparatus 10 disclosed herein, as shown in FIG. 2, the pay-out unit 30 includes a pair of holding parts 34 and 36 and a pair of support parts 40 and 50. The take-up unit 60 includes, similarly to the pay-out unit 30, a pair of holding parts and a pair of support parts 40 and 50 (see FIG. 1). Hereinafter, the configurations of the pay-out unit 30 and the take-up unit 60 will be described taking the pay-out unit 30 as an example. Since the take-up unit 60 can have the same configuration as the pay-out unit 30, a detailed description thereof will be omitted.

[0036] In the pay-out roll A1 housed in the pay-out unit 30, the workpiece A is wound around the core A2. The core A2 is substantially cylindrical. In the left-right direction, the length of the core A2 is longer than the width of the workpiece A. The workpiece A before processing is wound around the outer peripheral surface A3 of the core A2.

[0037] <A pair of holding parts 34, 36> The pair of holding parts 34, 36 are members that hold the core A2 of the roll around which the object to be processed A is wound from both axial sides. The pair of holding parts 34, 36 face each other in the width direction (left - right direction) of the unwinding part 30. The holding part 34 holds the left - hand end part A21 of the core A2. The holding part 36 holds the right - hand end part A22 of the core A2.

[0038] The holding part 34 is connected to an unwinding shaft 32 that is rotationally driven by a conveying device 20. In this embodiment, the conveying device 20 is housed in an air box 20a provided inside the outer wall 31. The inside of the air box 20a is maintained at atmospheric pressure even when the vacuum pump 80 is operating during the processing of the object to be processed A. The power of the conveying device 20 is transmitted to the unwinding shaft 32 via a shaft 20b and a plurality of gears 20c. In this embodiment, the power of the conveying device 20 is transmitted to the unwinding shaft 32 via three gears 20c. The number of gears 20c is not particularly limited. Note that the mechanism for transmitting the power of the conveying device 20 to the unwinding shaft 32 is not limited to such a form. The gear 20c for transmitting the power of the conveying device 20 does not necessarily have to be provided. For example, the conveying device 20 may be arranged on the axis of the unwinding shaft 32, and a shaft extending from the conveying device 20 may be directly connected to the unwinding shaft 32. The gears 20c are housed in an air box 20d provided inside the outer wall 31. The air boxes 20a, 20d are supported by a support plate 33a. A bearing for rotatably supporting the unwinding shaft 32 may be attached to the support plate 33a.

[0039] FIG. 3 is a schematic diagram showing the holding configuration of the core A2. In FIG. 3, the holding part 34 and the left - hand end part A21 of the core A2 held by the holding part 34 are shown. In FIG. 3, the core A2 and the holding part 34 when the holding by the holding part 34 is released are shown by a two - dot chain line.

[0040] As shown in FIG. 3, the holding portion 34 has an end portion 34a and a tapered portion 34b. The end portion 34a is a substantially disk-shaped part. The winding shaft 32 is connected to the substantially central portion of the end portion 34a from the left side. The tapered portion 34b is provided on the side (right side) facing the holding portion 36. The tapered portion 34b is a part of the holding portion 34 that supports the core A2. The tapered portion 34b of the holding portion 34 decreases in diameter as it goes toward the other holding portion 36. The tapered portion 34b is tapered so that its diameter decreases toward the holding portion 36, and is substantially frustum-shaped. The tip surface 34b1 of the tapered portion 34b of the holding portion 34 is a flat surface. By providing a flat tip surface 34b1 at the tip of the tapered portion 34b, the length of the tapered portion 34b is shortened. As a result, by simply moving the holding portion 34 slightly in the left-right direction, the holding and release can be switched. The tapered portion 34b holds the core A2 from the inner peripheral surface A4 with the core A2 inserted therethrough.

[0041] As shown in FIG. 2, the holding portion 36 has an end portion 36a and a tapered portion 36b. The holding portion 36 decreases in diameter as it goes toward the other holding portion 34. Since the holding portion 36 has the same shape as the holding portion 34, detailed illustration is omitted. The tapered portion 36b holds the right end portion A22 of the core A2. The driven shaft 32a is connected to the substantially central portion of the end portion 36a from the right side. The driven shaft 32a is rotatably supported by the support plate 33b. The driven shaft 32a rotates in a driven manner with respect to the rotation of the winding shaft 32 via the core A2.

[0042] The holding portion 34 connected to the winding shaft 32 and the holding portion 36 connected to the driven shaft 32a are driven by the driving device 100.

[0043] <Drive Device 100> The drive device 100 drives a pair of holding parts 34 and 36 along the direction in which the pair of holding parts 34 and 36 face each other. In this embodiment, the drive device 100 drives the support plates 33a and 33b. The pair of holding parts 34 and 36 are each driven via the support plates 33a and 33b. The drive device 100 drives the pair of holding parts 34 and 36 in the direction in which the pair of holding parts 34 and 36 approach or move away from each other.

[0044] The drive device 100 includes a motor 101, a ball screw 102, guide rails 103 and 104, and sliders 105 and 106. The motor 101 rotationally drives the ball screw 102 along the circumferential direction of the ball screw 102. The motor 101 and the ball screw 102 may be connected via a coupling, bearings, or the like. The ball screw 102 extends along the direction in which the pair of holding parts 34 and 36 face each other (the axial direction of the core A2). Two ball nuts (not shown) are screwed onto the ball screw 102. The two ball nuts are configured to move in different directions in accordance with the rotation of the ball screw 102. For example, the directions of the female threads of the two ball nuts, or the direction of the male thread of the ball screw 102 onto which the two ball nuts are screwed, may be set to different directions.

[0045] The guide rails 103 and 104 extend along the facing direction (axial direction of the core A2) in which the pair of holding portions 34 and 36 face each other. The guide rail 103 is provided on a base 31a provided on the floor surface of the unwinding portion 30. The guide rail 103 is provided below the holding portion 34, and the guide rail 104 is provided below the holding portion 36. Sliders 105 and 106 are respectively arranged on the guide rails 103 and 104. Support plates 33a and 33b to which the holding portions 34 and 36 are respectively attached are attached to the sliders 105 and 106. The sliders 105 and 106 are configured to be movable along the guide rails 103 and 104 respectively. The sliders 105 and 106 are respectively connected to one of the two ball nuts screwed onto the ball screw 102. For this reason, the sliders 105 and 106 are driven along the facing direction in accordance with the rotation of the ball screw 102. Thereby, the pair of holding portions 34 and 36 are driven along the facing direction.

[0046] When the pair of holding portions 34 and 36 hold the core A2, the driving device 100 drives the pair of holding portions 34 and 36 along the facing direction (the direction in which the pair of holding portions 34 and 36 approach each other). When the pair of holding portions 34 and 36 hold the core A2, the tapered portion 34b of the holding portion 34 is inserted into the inner peripheral surface A4 (see FIG. 3) of the core A2 (the holding portion 36 is the same as the holding portion 34). When the pair of holding portions 34 and 36 release the holding of the core A2, the driving device 100 drives the pair of holding portions 34 and 36 along the direction opposite to the facing direction (the direction in which the pair of holding portions 34 and 36 move away from each other). At this time, as shown in FIG. 3, the holding portion 34 is driven in the direction indicated by the arrow in the figure (the opposite direction), and the tapered portion 34b is withdrawn from the end portion A21 of the core A2. Similarly, the holding portion 36 is driven along the direction away from the holding portion 34, and the tapered portion 36b is withdrawn from the end portion A22 of the core A2 (see FIG. 2). With such a configuration, the holding and release of the core A2 by the pair of holding portions 34 and 36 can be easily switched.

[0047] As shown in FIG. 2, a pair of support portions 40 and 50 are provided below both end portions A21 and A22 of the core A2 held by the pair of holding portions 34 and 36.

[0048] 〈A pair of support portions 40 and 50〉 The pair of support portions 40 and 50 are members that receive the end portions A21 and A22 of the core A2, respectively. When the pair of holding portions 34 and 36 hold the core A2, both end portions A21 and A22 of the core A2 are supported by the pair of support portions 40 and 50. When the holding of the core A2 is released, both end portions A21 and A22 of the core A2 are lifted from the support portions 40 and 50. The height of the support portions 40 and 50 is not particularly limited as long as it is set to a height at which the holding and release of the core A2 can be switched in accordance with the driving of the pair of holding portions 34 and 36. In this embodiment, the positions of the pair of support portions 40 and 50 are set such that when the support portions 40 and 50 support the core A2, the upper end portion of the inner peripheral surface A4 of the core A2 is lower than the upper end portions of the tip portions of the tapered portions 34b and 36b of the pair of holding portions 34 and 36.

[0049] In the above-described embodiment, the heat treatment apparatus 10 includes a conveyance device 20, a pay-out unit 30, a heat treatment unit 90, and a take-up unit 60. The conveyance device 20 conveys the belt-shaped object to be treated A. The pay-out unit 30 pays out the object to be treated A. In the heat treatment unit 90, the paid-out object to be treated A is heat-treated while being conveyed along a predetermined conveyance path. The take-up unit 60 takes up the treated object to be treated A. The pay-out unit 30 includes a pair of holding portions 34 and 36 and a pair of support portions 40 and 50. The pair of holding portions 34 and 36 hold the core A2 of the roll (here, the pay-out roll A1) around which the object to be treated A is wound from both axial sides. The pair of support portions 40 and 50 receive the end portions A21 and A22 of the core A2 below both end portions A21 and A22 of the core A2 held by the pair of holding portions 34 and 36, respectively. In the above-described embodiment, the pay-out unit 30 includes the pair of holding portions 34 and 36 and the pair of support portions 40 and 50, but the take-up unit 60 may include the pair of holding portions 34 and 36 and the pair of support portions 40 and 50.

[0050] When replacing the roll (in this embodiment, the unwinding roll A1), the core A2 can be held by a pair of support portions 40 and 50 provided below both end portions A21 and A22 of the core A2. Since the pair of support portions 40 and 50 are provided below both end portions A21 and A22 of the core A2, the transfer between the pair of holding portions 34 and 36 and the pair of support portions 40 and 50 is smooth. For example, in the unwinding section 30, there may be a case where the unwinding roll A1 around which the object to be processed A is unwound is replaced with a new unwinding roll A1 before the object to be processed A is unwound. The weight of the new unwinding roll A1 may be large. With the new unwinding roll A1 temporarily placed on the pair of support portions 40 and 50, the core A2 of the new unwinding roll A1 can be held by the pair of holding portions 34 and 36. The unwinding section 30 before unwinding may be placed on the pair of support portions 40 and 50 by a lifter or the like. As a result, the workability of roll replacement in the unwinding section 30 is good. Also, in the winding section 60, there may be a case where the winding roll A6 around which the object to be processed A is wound is replaced with the core of a new winding roll before the object to be processed A is wound. The weight of the winding roll A6 around which the processed object A is wound may be large. The wound winding roll A6 can be temporarily placed from the pair of holding portions 34 and 36 to the pair of support portions 40 and 50. The wound winding roll A6 may be carried out from the pair of support portions 40 and 50 by a lifter or the like. As a result, the workability of roll replacement in the winding section 60 is good.

[0051] Note that the form of the pair of support portions 40 and 50 is not particularly limited as long as the core A2 can be held.

[0052] FIG. 4 is a perspective view of the support portion 40. In FIG. 4, the core A2 is virtually shown by a two-dot chain line. Hereinafter, regarding the configuration of the pair of support portions 40 and 50, the configuration of the support portion 40 will be described as an example. Since the support portion 50 can have the same configuration as the support portion 40, a detailed description thereof will be omitted. As shown in FIG. 4, the support portion 40 has a mounting portion 41, a first support plate 42, a second support plate 43, and a pair of support rollers 44.

[0053] 〈Mounting portion 41〉 The attachment part 41 is a part that is attached onto the base 31a (refer to FIG. 2) within the unwinding part 30. The attachment part 41 is attached onto the base 31a by bolts 41a. The attachment part 41 is a substantially rectangular plate-shaped part. From one side (in this embodiment, the left long side) of the attachment part 41, a first support plate 42 extends along the height direction.

[0054] 〈The first support plate 42〉 The first support plate 42 is a substantially rectangular plate-shaped part whose height is larger than the width along the front-rear direction. The first support plate 42 has ribs 42a along the height direction. The ribs 42a are provided on the surface (the right surface) 42b of the plate-shaped first support plate 42 that faces the support part 50. The ribs 42a are provided at the central part in the width direction of the first support plate 42. The ribs 42a extend from the upper surface of the attachment part 41 to the upper part of the first support plate 42. A stepped surface 42c is provided at the upper part of the right surface of the first support plate 42. The stepped surface 42c is thinner than other parts of the first support plate 42. A second support plate 43 is attached to the stepped surface 42c.

[0055] 〈The second support plate 43〉 The second support plate 43 is a plate-shaped member attached to the upper part of the first support plate 42. The second support plate 43 may be detachably attached to the first support plate 42. A recess 43a1 is formed at approximately the center of the upper side 43a of the second support plate 43. By forming the recess 43a1 in the second support plate 43, interference with the holding portion 34 can be prevented. The second support plate 43 is attached to the stepped surface 42c of the first support plate 42 by bolts 43b. The second support plate 43 may be attached to be position-adjustable with respect to the stepped surface 42c. A long hole for attaching the bolts 43b may be formed in the first support plate 42. The height of the second support plate 43 may be adjusted by adjusting the position of the bolts 43b within the long hole. In this embodiment, the second support plate 43 is spaced apart from the lower end 42c1 of the stepped surface 42c of the first support plate 42 by a predetermined interval. A pair of support rollers 44 are provided on the upper part of the second support plate 43. The shape etc. of the second support plate 43 are not particularly limited.

[0056] 〈A pair of support rollers 44〉 The pair of support rollers 44 are rollers that support the core A2 of the pay-out roll A1. The support rollers 44 are attached at the same height in front of and behind the second support plate 43 by bolts 44a. The support rollers 44 are rotatably attached to the second support plate 43. The rotation axis 44b of the support rollers 44 is along the direction in which the pair of support portions 40, 50 face each other and is parallel to the axial direction of the core A2. The support rollers 44 are provided on the surface (right side surface) of the second support plate 43 that faces the support portion 50. The support rollers 44 are provided on the second support plate 43. The core A2 is supported by the outer peripheral surfaces 44c of the pair of support rollers 44. When the core A2 is rotated in the circumferential direction, the pair of support rollers 44 rotate following the rotation of the core A2 respectively.

[0057] When replacing the unwinding roll A1, the object A to be processed unwound from the unwound roll A1 (the unwinding roll A1 supported by the support parts 40 and 50) after replacement can be unwound. After the object A to be processed is unwound, it can be connected to the object A to be processed unwound from the unwinding roll A1 before replacement or to the winding roll A6. Since the core A2 is supported by the pair of support rollers 44, the rotation of the core A2 is easy, and for example, the core A2 can be rotated even manually. During the roll replacement operation, the object A to be processed unwound from the unwound roll A1 after replacement can be manually unwound and connected to the preceding object A to be processed, and the workability of operations such as reconnecting the object A to be processed can be improved.

[0058] The support part 40 has a guide 43a2 outside the end part of the core A2 (in this embodiment, the end part A21). The guide 43a2 is a part that protrudes upward from the position where the core A2 is supported outside the end part A21 of the core A2. In this embodiment, the upper side 43a of the second support plate 43 protrudes upward from the position where the core A2 is supported, and the part between the upper side 43a and the support roller 44 functions as the guide 43a2. Since the guide 43a2 is provided on the support part 40, the core A2 can be prevented from falling off, and the workability of roll replacement can be improved.

[0059] In the above-described embodiment, the support plate (here, the first support plate 42) has ribs 42a extending along the height direction. For this reason, the durability of the second support plate 43 can be improved. As a result, even when the weight of the roll (here, the newly replaced unwinding roll A1) is heavy and a large load may be applied to the support part 40 during the roll replacement operation, problems during roll replacement are less likely to occur.

[0060] As described above, detailed descriptions have been given with specific embodiments, but these are merely examples and do not limit the scope of the claims. Thus, the technology described in the claims includes various modifications and changes of the above-described embodiments.

[0061] Note that this specification includes the following items 1 to 5. The following items 1 to 5 are not limited to the above-described embodiments.

[0062] Item 1: A conveying device for conveying a strip-shaped object to be processed, An unwinding part for unwinding the object to be processed, A heat treatment part for heat-treating the unwound object to be processed while being conveyed along a predetermined conveying path, A winding part for winding the processed object to be processed, Comprising, At least one of the unwinding part and the winding part is A pair of holding parts for holding the core of the roll around which the object to be processed is wound from both axial sides, A pair of support parts for receiving the end parts of the core respectively below both end parts of the core held by the pair of holding parts, Equipped with, A heat treatment device.

[0063] Item 2: The support part has a pair of support rollers for supporting the core, and the heat treatment device according to Item 1.

[0064] Item 3: The support part has a guide protruding upward from a position where the core is supported outside the end part of the core, and the heat treatment device according to Item 1 or 2.

[0065] Item 4: The support part has a support plate extending along the height direction, The support plate has ribs extending along the height direction, and the heat treatment device according to any one of Items 1 to 3.

[0066] Item 5: Further comprising a drive device, The pair of holding parts each have a smaller diameter as they face the other holding part, The drive device drives the pair of holding parts along the direction in which the pair of holding parts face each other, By driving the pair of holding parts in the opposing direction by the drive device, the pair of holding parts hold the core, The heat treatment apparatus according to any one of claims 1 to 4, wherein by driving the pair of holding parts in a direction opposite to the opposing direction by the drive device, the pair of holding parts release the holding of the core.

Explanation of Signs

[0067] A Workpiece A1 Pay-off roll A2 Core A21, A22 Ends A3 Outer peripheral surface A4 Inner peripheral surface A6 Take-up roll 10 Heat treatment apparatus 20, 22 Conveying device 20a, 20d Atmosphere box 20b Shaft 20c Gear 30 Pay-off section 31, 61 Outer wall 31a Base 32 Pay-off shaft 32a Driven shaft 33a, 33b Support plate 34, 36 Holding part 34a, 36a End 34b, 36b Taper section 34b1 Tip surface 35 Roller 40, 50 Support section 41 Mounting part 41a Bolt 42 First support plate 42a Rib 42b Surface 42c Step surface 42c1 Lower end 43 Second support plate 43a Upper side 43a1 Depression 43a2 Guide 43b Bolt 44 Support roller 44a Bolt 44b Rotating shaft 44c Outer peripheral surface 60 Take-up section 62 Take-up shaft 65 Roller 70, 72, 74 Connecting section 80 Vacuum pump 90 Heat treatment section 95 Cooling section 100 Driving device 101 Motor 102 Ball screw 103, 104 Guide rail 105, 106 Slide

Claims

1. A conveying device for conveying a strip-shaped object to be processed, An unwinding section for unwinding the object to be processed, A heat treatment section for heat-treating the unwound object to be processed while being conveyed along a predetermined conveying path, A winding section for winding up the processed object to be processed and comprising, At least one of the unwinding section and the winding section is, A pair of holding portions for holding the core of the roll around which the object to be processed is wound from both axial sides, A pair of support portions for receiving the end portions of the core respectively below both end portions of the core held by the pair of holding portions and comprising, A heat treatment apparatus.

2. The support portion has a pair of support rollers for supporting the core, and the heat treatment apparatus according to claim 1.

3. The support portion has a guide protruding upward from a position for supporting the core outside the end portion of the core, and the heat treatment apparatus according to claim 1 or 2.

4. The support portion has a support plate extending along the height direction, The support plate has ribs extending along the height direction, and the heat treatment apparatus according to claim 1 or 2.

5. Further comprising a drive device, The pair of holding portions are each smaller in diameter as they face the other holding portion, The drive device drives the pair of holding portions along the direction in which the pair of holding portions face each other, By the drive device driving the pair of holding portions in the facing direction, the pair of holding portions hold the core, By the drive device driving the pair of holding portions in a direction opposite to the facing direction, the pair of holding portions release the holding of the core, and the heat treatment apparatus according to claim 1 or 2.

Images