Coil Car

Abstract

We provide a coil car that can reliably receive coils. [Solution] The coil car 30 receives and moves coils 1 (1A~1D) in which a recoiler drum 10 is inserted into a central hole. The coil 1 is a roll in which a metal sheet manufactured by rolling is wound, and is divided by a slit along the circumferential direction, and has the characteristic that the outer diameter differs depending on the axial position. The coil car 30 is equipped with a plurality of lifting support bases 70A~70D arranged along the axial direction of the coil 1. Each lifting support base 70 is equipped with a receiving plate 79 that receives the coil 1 and a hydraulic drive unit 72 that drives the receiving plate 79 in the vertical direction Z independently of the receiving part 79 of the other lifting support base 70. In the process of removing the coil 1 from the recoiler drum 10, by driving each hydraulic drive unit 72, each receiving plate 79 is kept in contact with the outer circumferential surface of the coil 1 and is kept at a different height from the receiving plate 79 of the other lifting support base 70.

Description

Technical Field

[0001] The present invention relates to a coil car for transferring coils.

Background Art

[0002] Conventionally, in a facility such as a metal plate processing factory, there has been a coil car that receives and transfers a supported coil (for example, Patent Document 1). However, when the conventional coil car receives a supported coil, the coil may tilt and become unstable.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] An object of the present invention is to provide a coil car that can stably receive a coil.

Means for Solving the Problems

[0005] One aspect of the present invention is, for example, a coil car that receives and moves a coil in which a shaft body is inserted into a central hole, the coil being a roll wound with a rolled metal plate, divided by a slit along the circumferential direction, having a characteristic that the outer diameter varies according to the axial position, and including a plurality of receiving bases arranged along the axial direction of the shaft body, each receiving base including a receiving portion for receiving the coil and a receiving portion driving portion for driving the receiving portion vertically independently of the receiving portions of other receiving bases, and in the step of removing the coil from the shaft body, by driving each receiving portion driving portion, maintaining the state in which each receiving portion is in contact with the outer peripheral surface of the coil and maintaining a height different from the height of the receiving portions of other receiving bases.

Brief Description of the Drawings

[0006] [Figure 1] This diagram illustrates the configuration of the coil car 30 in the embodiment as seen from the left side X1. [Figure 2] This diagram illustrates the configuration of the coil car 30 in the embodiment as seen from the rear side Y2. [Figure 3] This diagram shows the configuration of the coil car 30 in the embodiment when it receives the coil 1, viewed from the left side X1. [Figure 4] This is a diagram illustrating a single fixed support base 60 of the embodiment. [Figure 5] This is a diagram illustrating a single unit of the lifting support platform 70 according to the embodiment. [Figure 6] This is a partial cross-sectional view illustrating the operation of the coil car 30 of the embodiment in which it receives the coil 1. [Figure 7] This is a schematic diagram illustrating the configuration of the comparative example coil car 130, etc. [Figure 8] This figure shows a portion of a longitudinal section illustrating the operation of pulling coil 1 from the recoiler drum 10 using a comparative example coil car 130. [Modes for carrying out the invention]

[0007] (Embodiment) Embodiments of the present invention will be described below with reference to the drawings and other documents. Figure 1 is a diagram illustrating the configuration of the coil car 30 of the embodiment as seen from the left side X1. Figure 2 illustrates the configuration of the coil car 30 in the embodiment as seen from the rear side Y2. Figure 3 shows the configuration of the coil car 30 in the embodiment when it receives the coil 1, viewed from the left side X1. Figure 4 is a diagram illustrating a single fixed support base 60 of the embodiment. Figure 4(A) shows the fixed support base 60 as viewed from the left side X1. Figure 4(B) is a cross-sectional view of the lifting support platform 70 as seen from the rear side Y2. Figure 5 is a diagram illustrating a single unit of the lifting support platform 70 according to the embodiment. Figure 5(A) shows the lifting platform 70 as viewed from the left side X1. Figure 5(B) is a diagram illustrating the cross-sectional shape of the lifting support platform 70 as seen from the left side X1 (BB ​​cross-section in Figure 5(C)). Figure 5(C) is a diagram illustrating the cross-sectional shape of the lifting support platform 70 as seen from the rear side Y2 (the CC cross-sectional view of Figure 5(A)). Figure 5(D) shows the lifting support platform 70 viewed from above at Z2. In the embodiments and drawings, the XYZ Cartesian coordinate system will be shown and explained as appropriate. This coordinate system represents the left-right direction X (left X1, right X2) and the vertical direction Z (downward Z1, upward Z2) of the coil car 30, with the forward-backward direction Y (front Y1, rear Y2) being the direction of travel of the coil car 30 (the axis direction of the recoiler drum 10). Note that the left-right direction X and the forward-backward direction Y are parallel to the horizontal plane. The coil car 30 is a device that receives and transports a coil 1 supported by a recoiler drum 10 within a facility such as a metal sheet processing plant. This device is also called an output coil car.

[0008] (Coil 1) This section provides an overview of coil 1 (1A~1D) and recoiler drum 10. When the coil 1 is supported by the support column 15 and transported by the coil car 30, it is positioned so that the direction of its central axis is parallel to the horizontal direction. Coil 1 is a roll in which a rolled metal sheet is wound around a recoiler drum 10 (shaft), and is cylindrical in shape. The metal sheet is, for example, a hot-rolled steel sheet.

[0009] The recoil drum 10 is held by a support column 15 installed on the floor 20 of the facility. The recoil drum 10 has the function of expanding and contracting its outer diameter. For example, the outer diameter DL in the expanded state is 508 mm, and the outer diameter DS in the contracted state is 480 mm (see Figure 6). As will be described later, when the coil 1 is removed, the recoil drum 10 is held in a cantilevered position and controlled from the expanded state to the contracted state.

[0010] Coil 1 is divided into a plurality of parts by slits along the circumferential direction. The number of divisions and the width (length in the front-rear direction Y) of Coil 1 can be appropriately set according to the specifications of the product. In the embodiment, as an example, an example where Coil 1 is divided into 7 parts will be described. In the embodiment, an example where Coil 1A is arranged in the center and three coils 1B to 1D are arranged in the front-rear direction Y on each side thereof will be described. Also, the widths of Coils 1A to 1D may be the same or different. As an example, the outer shape of Coil 1 has an axial length L1 (total of the seven coils 1A to 1D) of about 1800 mm and a maximum outer diameter of about 2000 mm. The width of the slit is, for example, about 5 mm. When dividing a single base coil into a plurality of parts, processing such as cutting while having a slit in the circumferential direction and then winding it again around a single recoiler drum 10 is performed (detailed description is omitted). Here, the outer diameter of the base coil has the characteristic that it is larger at the central part in the axial direction due to the crown during rolling and becomes smaller as it reaches the end part in the axial direction. The outer diameter difference (= D1A - D1D) between the central part and the end part in the axial direction of the base coil is, for example, about 40 mm (about 20 mm in radius) (see FIG. 1). The outer diameters of the seven coils 1A to 1D wound up after division also have the same characteristic.

[0011] (Coil car 30) Coil car 30 receives and transfers the coil 1 supported by the recoiler drum 10 from the recoiler drum 10. Coil car 30 moves along the rail 25 (track) provided in the facility. The front-rear direction Y of Coil car 30 is the same as the axial direction of the recoiler drum 10. The front side Y1, which is the forward direction of Coil car 30, is the side where the support 15 is not provided in the axial direction of the recoiler drum 10 (the side opposite to the support 15 side).

[0012] Coil car 30 includes a vehicle body 31, wheels 32, a hydraulic drive unit 40, a guide unit 41, a lifting table 45 (receiving base fixing part), a height detection unit 46, a receiving unit 50, and a control device 90. Vehicle body 31 is a base member for attaching various parts of Coil car 30. The wheels 32 are provided on the left and right sides of the front side Y1 of the vehicle body 31 and the left and right sides of the rear side Y2, respectively. The left and right wheels 32 are connected by a single axle. The coil car 30 includes a driving part (not shown) such as a motor for rotationally driving the wheels 32. The wheels 32 are placed on the rail 25 provided inside the groove 21. Thereby, the coil car 30 can travel by itself along the rail 25 provided inside the groove 21.

[0013] The hydraulic driving part 40 and the guide part 41 are devices for raising and lowering the lifting table 45 in the vertical direction Z with respect to the vehicle body 31. Incidentally, after the coil car 30 receives the coil 1 from the recoiler drum 10, it descends to a height suitable for transferring the coil 1 (for example, near the floor surface 20). For this reason, the moving stroke of the lifting table 45 is sufficiently large (for example, 500 mm or more).

[0014] The hydraulic driving part 40 is provided at the center of the vehicle body 31 when viewed in the vertical direction Z. The hydraulic driving part 40 is a device that moves the rod 40b in the vertical direction Z by the hydraulic pressure of the oil supplied from an oil tank (not shown) to the cylinder 40a. The cylinder 40a is fixed to the vehicle body 31. The upper end of the rod 40b is fixed to the lifting table 45.

[0015] The guide part 41 is a device for guiding the lifting table 45 in the vertical direction Z. The guide part 41 is provided at the front and rear of the vehicle body 31, respectively. The guide part 41 includes a guide cylinder 41a and a cylindrical shaft 41b. The guide cylinder 41a is a cylindrical tube. The guide cylinder 41a is fixed to the vehicle body 31. The cylindrical shaft 41b is a cylindrical shaft body. The cylindrical shaft 41b is inserted through the hole of the guide cylinder 41a and moves along the central axis direction. The upper end of the cylindrical shaft 41b is fixed to the lifting table 45. The lifting table 45 is provided on the upper side Z2 of the vehicle body 31. A fixed receiving base 60 and a lifting receiving base 70 are fixed to the upper surface of the lifting table 45. The height detection unit 46 is a device such as a linear encoder that detects the height of the lifting table 45.

[0016] The receiving unit 50 is a device for supporting the coil 1 by placing the coil 1 on it during the process of removing the coil 1 from the recoiler drum 10. The receiving unit 50 is equipped with a total of 10 receiving bases: 2 fixed receiving bases 60 and 8 lifting receiving bases 70 (70A to 70D). These 10 support bases are arranged in a line along the front-to-back direction Y. The fixed support base 60 is located in the center of the front-to-back direction Y. The lifting support bases 70A to 70D are located on the front side Y1 and rear side Y2 of the two fixed support bases 60, respectively.

[0017] The two fixed support bases 60 have the same configuration, differing only in their mounting position relative to the lifting table 45. As shown in Figure 4, the fixed support base 60 comprises a base 61 and two support plates 69. The base portion 61 is the base component of the fixed support base 60. The base portion 61 is fixed on the lifting table 45. When viewed from the front-rear direction Y, the upper surface of the base portion 61 has two intersecting surfaces in a V-shape (see Figure 4(B)). The receiving plate 69 is a long, narrow plate-shaped member in the left-right direction X. The two support plates 69 are fixed to the upper surface of the base 61. The two support plates 69 are arranged in a V-shape with an opening on the upper side Z2, and are also arranged symmetrically in the left-right direction X. In a cross-section viewed from the front-rear direction Y (see Figure 4(B)), the inclination angle of each support plate 69 is such that the center of each support plate 69 is in contact with the outer surface of the coil 1. The material of the receiving plate 69 can be rubber, thermoplastic elastomer, or the like, so as not to damage the outer surface of the coil 1.

[0018] The eight lifting support bases 70 (70A to 70D) have the same configuration, differing only in their mounting position relative to the lifting table 45. As shown in Figure 5, each lifting support base 70 (70A to 70D) is equipped with a base 71, a hydraulic drive unit 72, a guide unit 73, a lifting block 75, a swinging support unit 76 (rotation support unit), a swinging block 77, and a receiving plate 79 (receiving unit). The base 71 is the base component of the lifting support platform 70. The base 71 is fixed on the lifting table 45. The base 71 and hydraulic drive unit 72 are devices (receiving drive units) for raising and lowering the lifting block 75 in the vertical Z direction. The movement stroke of the lifting block 75 is sufficiently smaller than the movement stroke of the lifting table 45 (for example, within 20 mm). This is because the lifting block 75 only needs to be able to move up and down by the radius difference of the coil 1 caused by the crown (details of the lifting operation will be described later). For this reason, the hydraulic drive unit 72 and guide unit 73 are sufficiently smaller devices than the hydraulic drive unit 40 and guide unit 41 described above.

[0019] The hydraulic drive unit 72, like the hydraulic drive unit 40, is a device that moves the rod 72b in the vertical direction Z by the hydraulic pressure of the oil supplied to the cylinder 72a. The cylinder 72a is fixed to the lifting table 45. The upper end of the rod 72b is fixed to the lifting block 75. The oil from the oil tank is supplied to each hydraulic drive unit 72 of each lifting support 70 via a terminal 74 (see Figure 1, etc.) provided on the vehicle body 31. In the drawings, oil hoses and the like are not shown.

[0020] The guide section 73 is a device that guides the lifting block 75 in the vertical direction Z. The guide sections 73 are provided on the left and right sides of the base section 71. The guide section 73 includes a guide shaft 73a and a guide hole 73b. The guide shaft 73a is a cylindrical shaft. The guide shaft 73a is fixed to the base 71 so as to protrude from the upper side Z2 of the base 71. The guide hole 73b is a round hole provided on the lower surface of the lifting block 75. The upper part of the guide shaft 73a is inserted into the guide hole 73b.

[0021] The lifting block 75 is supported by a hydraulic drive unit 72 and a guide unit 73 so that it can move up and down in the vertical direction Z relative to the base 71. The swing support portion 76 is the part that supports the swing block 77 relative to the lifting block 75 so that it can swing (rotate) around an axis in the left-right direction X. The swing support portions 76 are provided on both the left and right sides of the lifting block 75. The swing support section 76 includes a support shaft 76a and a support hole 76b. The support shaft 76a is a cylindrical shaft portion provided on the upper side Z2 of the lifting block 75. The axial direction of the support shaft 76a is the left-right direction X. The support hole 76b is a round hole provided on the lower side Z1 of the rocking block 77. The support shaft 76a is inserted into the support hole 76b. With the above configuration, the swinging block 77 can swing (rotate) around the axis in the left-right direction X relative to the lifting block 75. The swinging angle of the swinging block 77 is restricted by a stopper (not shown) to be within approximately 2 degrees (approximately 1 degree in each direction).

[0022] The rocking block 77 is positioned above the lifting block 75, at a position Z2. The upper surface of the rocking block 77 has two intersecting surfaces in a V-shape, similar to the base 61 of the fixed support 60. In a cross-section viewed from the front-rear direction X (see Figure 5(C)), the cross-sectional shape of the upper surface of the swing block 77 and the support plate 79 of the lifting support base 70 is the same as the cross-sectional shape of the upper surface of the base 61 and the support plate 69 of the fixed support base 60. With the above configuration, the 10 sets of support plates 69, 79 are arranged along the axial direction of the coil 1 and are positioned to support the outer surface of the coil 1 from below Z1. In addition, each support plate 79 of each lifting support base 70 can be driven in the vertical direction Z independently of the other support plates 69, 79. Furthermore, the fixed support base 60 has a support plate 69 fixed to the lifting table 45, while the lifting support base 70 has a support plate 79 that moves up and down and swings relative to the lifting table 45.

[0023] The control device 90 is a computer that controls the coil car 30. The control device 90 includes a control unit such as a CPU, and a storage unit such as a hard disk or semiconductor memory device. The control device 90 may also be used as a device for controlling the recoiler drum 10, and may be composed of multiple computers.

[0024] (Operation of the coil car 30 when receiving coil 1 from the recoil drum 10 and transporting it) Figure 6 is a partial cross-sectional view illustrating the operation of the coil car 30 of the embodiment in which it receives the coil 1. In describing the operation, the configuration of coil 1 and coil car 30 (fixed support base 60, lifting support base 70, etc.) is almost symmetrical in the front-to-back direction Y, so the description of the front part will be omitted as appropriate. As a prerequisite for receiving coil 1 from the recoiler drum 10, coil 1 is cantilevered by the recoiler drum 10. The lifting table 45 of the coil car 30 is positioned at the bottom of its stroke by a hydraulic drive unit 40. Also, the receiving plate 79 of the lifting support base 70 of the coil car 30 is positioned at the bottom of its stroke by a hydraulic drive unit 72. The receiving plate 79 may be tilted by swinging.

[0025] The control device 90 controls the coil car 30 in the following order. (1) As shown in Figure 1, the control device 90 moves the coil car 30 along the rail 25 to position it directly below the coil 1. (2) As shown in Figure 3, the control device 90 raises the lifting table 45 by controlling the hydraulic drive unit 40 (see arrow A1). The coil 1 has its largest outer diameter near the axial center due to the crown. As a result, the lifting table 45 stops rising when the receiving plate 69 of the fixed support base 60 comes into contact with the lower part (also simply called the bottom surface) of the outer circumferential surface of the coil 1. In this case, the control device 90 can determine that the lifting table 45 has stopped rising based on the output of the height detection unit 46. The control device 90 controls the hydraulic drive unit 72 to maintain the stopping position of the lifting table 45.

[0026] With step (2) completed, the distance between the support plates 79 of the lifting support bases 70A to 70D and the lower surface of the coil 1 in the vertical Z direction is sufficiently small, at most about 20 mm, corresponding to the crown. For this reason, the support plates 79 are positioned within the movement stroke of the hydraulic drive unit 72 from the lower surface of the coil 1.

[0027] (3) As shown in Figure 6, the control device 90 raises the eight support plates 79 by controlling the hydraulic drive units 72 (see Figure 5) of the eight lifting support platforms 70A to 70D. The lower surface of coil 1 is curved by the crown, from the center towards the rear Y2 (outer in the axial direction) and then towards the upper Z2. As the oscillating block 77 rises, each support plate 79 comes into contact with the lower surface of coil 1. In this case, each support plate 79 tilts along the curvature of the lower surface of coil 1 by oscillating under the support of the oscillating support part 76 (see Figure 5). The force exerted by the hydraulic drive unit 72 to lift the oscillating block 77 is significantly smaller than the force required to lift the coil 1. Therefore, the upward movement of the oscillating block 77 stops when each support plate 79 is tilted along the curvature of the lower surface of the coil 1. The control device 90 stops the upward drive of the hydraulic drive unit 72 after a certain period of time has elapsed. As a result, each support plate 79 maintains a state in contact with the lower surface of the coil 1 and a state inclined along the slope of the lower surface of the coil 1.

[0028] When this process is completed, the support plates 79 of the eight lifting support bases 70A to 70D are in contact with the underside of the coil 1. Since the coil 1 has a crown, the height of each support plate 79 is different from the height of the other support plates 79.

[0029] Here, the control device 90 communicates with the control device of the recoil drum 10 (not shown) to inform the control device of the recoil drum 10 that the upward drive of the hydraulic drive unit 72 has ended. Upon receiving this information, the control device of the recoil drum 10 controls the recoil drum 10 from the expanded state to the contracted state.

[0030] As shown in Figure 6, with the previous steps completed, the lower surfaces of coils 1A to 1D are in contact with support plates 69 and 79 arranged along the axial direction. Therefore, coil 1 is reliably supported by the support plates 69 and 79 when the recoiler drum 10 is retracted. In other words, these support plates 69 and 79 support the weight of coil 1 across the front-to-back direction Y (the axial direction of coil 1), so the height of coils 1A to 1D does not change before and after the recoiler drum 10 is retracted. As a result, coils 1A to 1D are arranged coaxially, and a gap is formed around the entire circumference without contact between the inner surfaces of the seven coils 1A to 1D and the outer surface of the recoiler drum 10.

[0031] (4) The control device 90 moves the coil car 30 to the front Y1 by controlling the wheels 32 in response to receiving information from the control device of the recoil drum 10 that it has been controlled to a reduced state (see arrow A2 in Figures 3 and 6). As a result, the seven coils 1A to 1D are removed from the recoil drum 10. As mentioned above, a gap is formed around the entire circumference between the inner surfaces of the seven coils 1A to 1D and the outer surface of the recoiler drum 10. Therefore, during the process of removing coil 1 from the recoiler drum 10, the inner surfaces of coils 1A to 1D are prevented from being rubbed or caught by excessive force. As a result, the coil car 30 can prevent damage to coil 1 when receiving coil 1 from the recoiler drum 10. After the coil car 30 receives the coil 1, the control device 90 drives the wheels 32 to transport the coil 1 to its destination within the facility. With this, the series of operations of the coil car 30 is completed.

[0032] (Comparative example) Figure 7 is a schematic diagram illustrating the configuration of the comparative example coil car 130, etc. Figure 8 shows a portion of a longitudinal section illustrating the operation of pulling coil 1 from recoiler drum 10 using a comparative example coil car 130. Note that the curvature of the curved surface on the circumferential surface of coil 1 is exaggerated in the drawing. In the descriptions and drawings of comparative examples, parts that perform the same function as the embodiments are appropriately given the same names, and the same reference numerals or the same reference numerals at the end (last two digits) are appropriately assigned to them, and redundant explanations are appropriately omitted. The comparative example coil car 130 is a conventional, general-purpose coil car. In the comparative example, the receiving plate 169 of the coil car 130 is integrated with the lifting table 145. Therefore, the receiving plate 169 does not have the function of moving up and down relative to the lifting table 145, nor the function of swinging relative to the lifting table 145.

[0033] As shown in Figure 8(A), as the lifting table 145 rises, when the support plate 169 is in contact with the central coil 1A, a gap S100 is created between the coils 1B to 1D at the end (rear side Y2) and the support plate 169. In this state, when the recoiler drum 10 is driven from the expanded state to the contracted state, the central coil 1A remains supported by the support plate 169. On the other hand, since there is a gap between the outer surface of the end coils 1B to 1D and the inner surface of the recoiler drum 10, the end coils 1B to 1D descend.

[0034] In the state shown in Figure 8(B), as the outermost coil 1D descends, the upper part of the outer surface of the recoiler drum 10 comes into contact with the upper part of the inner circumference of the coil 1D (the contact area A100 is shown by a thick line in Figure 8(B)), and the lower surface of the coil 1D has a gap S101 between it and the support plate 169 and is not in contact with it. In other words, the support plate 169 cannot receive the coil 1D, and the coil 1D is supported in a way that it is hanging from the recoiler drum 10. Furthermore, as coils 1B and 1C descend, the support plate 169 can receive coils 1B and 1C. However, since the support plate 169 does not swing, each coil 1B and 1C is supported only in part on the central side (front side Y1) (support points P101 and P102 are shown in Figure 8(B)), and the end side (rear side Y2) is floating by the curvature of the crown. In this state, coils 1B and 1C tend to fall outward (rear side Y2) (the direction of falling is shown by arrows θ101 and θ102 in Figure 8(B)), making them unstable, for example, by leaning against the adjacent coil.

[0035] In the state shown in Figure 8(B), when the coil car 130 moves forward, coil 1D is hanging from the recoiler drum 10 and cannot be properly pulled out (for example, it will hit coil 1C on the front Y1). Also, if coils 1B and 1C, which are tilted and unstable, are pulled out from the recoiler drum 10, there is a possibility that they will fall over completely.

[0036] Thus, the comparative example coil car 130 sometimes exhibited unstable operation when pulling coils 1A to 1D from the recoiler drum 10.

[0037] As described above, the coil car 30 of this embodiment can stably pull out the coil 1 from the recoiler drum 10, thereby suppressing damage to the coil 1.

[0038] Although embodiments of the present invention have been described above, the present invention is not limited to the embodiments described above. Various modifications and changes are possible, such as the modified forms described later, and these are also within the technical scope of the present invention. Furthermore, the effects described in the embodiments are merely a list of the most preferred effects resulting from the present invention, and the effects of the present invention are not limited to those described in the embodiments. Note that the configurations of the embodiments described above and the modified forms described later can be used in part or in combination as appropriate, but a detailed explanation is omitted.

[0039] (Transformed form) In the embodiments, the lifting support has been shown to include both a configuration that moves vertically and a configuration that swings the support plate, but it is not limited to these. The lifting support may include at least one of these configurations. In this case, the support will perform the actions and effects corresponding to each configuration. [Explanation of Symbols]

[0040] 1 (1A~1D): Coil 10: Licoira Drum 15: Prop 30: Coil Car 40: Hydraulic drive unit 41: Guide Section 45: Height-adjustable table 50: Receiving Unit 60:Fixed pedestal 61: Base 69: Receiving plate 70 (70A~70D): Lifting support stand 71: Base 72: Hydraulic drive unit 72a: Cylinder 72b: Rod 73: Guide Section 73a: Guide axis 73b: Guide hole 75: Elevating block 76: Swivel support part 76a: Support shaft 76b: Support hole 77: Oscillating block 79: Receiving plate 90: Control device

Claims

1. A coil car that receives and moves a coil in which a shaft is inserted into a central hole, A coil is a roll made by winding a metal sheet that has been manufactured by rolling, and is divided by slits along the circumferential direction, and has the characteristic of having different outer diameters depending on the axial position. It is equipped with multiple support bases arranged along the axial direction of the shaft, Each support base is A receiving part that receives the coil, The receiving portion is driven vertically independently of the receiving portion of the other receiving base, During the process of removing the coil from the shaft, the drive unit for each receiving part is driven to maintain contact between each receiving part and the outer surface of the coil, while also maintaining a height different from that of the receiving parts of other receiving bases. A coil car characterized by the following features.

2. Each receiving part is provided with a rotating support part that rotates and supports it around an axis that is perpendicular to the axial direction and parallel to the horizontal plane. Each receiving part rotates on the rotating support part in response to contacting the outer surface of the coil, thereby tilting along the outer surface of the coil and contacting the outer surface of the coil. The coil car according to claim 1.

3. A support base fixing section to which multiple support bases are fixed, A base drive unit drives the aforementioned support base fixing part in the vertical direction, and the vertical movement stroke is greater than the vertical movement stroke of the support drive unit, It includes a control unit, The control unit, By driving the base drive unit, the distance between each receiving part and the outer surface of the coil is controlled to be within the movement stroke of each receiving part drive unit, By driving each receiving part drive unit, each receiving part is positioned in contact with the outer surface of the coil. The coil car according to feature 1 or 2.

Images