Hoop guide and binding method of metal band coil

Abstract

To enable a hoop board to be inserted into a hoop guide installed at a coil car with an easy method at low costs.SOLUTION: A hoop guide is used to bind a metal band coil 10 on a coil car 3 with a hoop 11 by using a hoop guide included in a banding machine 20 and a hoop guide provided at the coil car 3 and is installed at the coil car 3. The hoop guide includes: an inlet part 1A into which the hoop 11 is inserted; and a body part 1B which is continuous with the inlet part 1A. A width W1 of an opening of the inlet 1Aa of the inlet part 1A is wider than a width W2 of an opening of the body 1B. The width of the opening of the inlet part 1A becomes smaller continuously from the inlet 1Aa to the body 1B.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a technique related to a hoop guide installed in a coil car, and a technique related to a method of bundling metal strip coils using a hoop guide. [Background technology]

[0002] The metal strip produced by rolling is wound into a metal strip coil. In this specification, the metal strip coil is also simply referred to as a coil. The wound coil is transferred onto a coil car. The coil car with the coil moves to the position of the banding machine and stops.

[0003] The coil on the coil car is then hoop-bound by a banding machine. This hoop binding is performed using a hoop guide installed on the coil car and a plurality of hoop guides installed on the banding machine. During this hoop binding, the hoop guide installed on the coil car and the plurality of hoop guides installed on the banding machine are positioned circumferentially outward of the coil on the coil car and aligned along the circumferential outer periphery of the coil. The hoop guide installed on the coil car is positioned below the coil. The hoop binding process involves passing the hoop through the alignment of the hoop guides, thereby arranging the hoop in a ring shape along the outer periphery of the coil. The diameter of the ring-shaped hoop is then reduced to tighten and bind the coil with the hoop.

[0004] In some cases, the stopping position of the coil car may deviate from the target position by a certain amount or more relative to the banding machine. In this case, when the hoop is passed from the banding machine's hoop guide to the coil car's hoop guide, the leading end of the hoop may get stuck at the entrance of the coil car's hoop guide, making it impossible to pass the hoop through. If the hoop cannot be passed through, the above-mentioned hoop binding cannot be achieved.

[0005] Conventionally, there are techniques described in Patent Documents 1 and 2 as techniques for preventing the hoop from being unable to pass through the hoop guide installed on the coil car by causing the coil car to stop at a position deviated from the target position.

[0006] Patent Document 1 describes a technique for obtaining coasting distance information from the previous stop and correcting the stopping coasting distance, with the aim of improving the accuracy of the stopping position of a coil car. In Patent Document 2, the current of the coil car drive motor is detected when the coil car transporting the coil is traveling at a constant acceleration, and the moment of inertia is calculated. Then, the deceleration distance for the coil car to stop at the stopping position is calculated using this moment of inertia. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Japanese Patent Application Publication No. 11-188423 [Patent Document 2] Japanese Patent Application Publication No. 5-27842 Summary of the Invention [Problem to be solved by the invention]

[0008] In the above conventional technology, the accuracy of the coil car's stopping position is improved to enable the hoop to be threaded through the hoop guide installed in the coil car. To achieve this, the above conventional technology obtains a deceleration and stop command by correcting the coasting distance of the coil car.

[0009] However, the coils mounted on the coil car often have different weights, which causes the weight balance of the coil car to differ each time, making it difficult to accurately calculate and correct the coasting distance. Furthermore, in order to correct the coasting distance when the coil car is stopped, control modifications and the installation of an additional coasting distance detection device are required, which poses the problem of increased equipment costs.

[0010] The present invention has been made in view of the above-mentioned problems, and has an object to enable a hoop to be passed through a hoop guide installed on a coil car in a low-cost and simple manner. [Means for solving the problem]

[0011] The inventors have investigated a method for enabling the hoop threading even when the coil car is not stopped at the correct position by simply changing the shape of the hoop guide installed on the coil car, instead of improving the accuracy of the coil car's stopping position. As a result, they have developed the present invention.

[0012] In order to solve this problem, one aspect of the present invention is a hoop guide installed on a coil car, used to bind a metal strip coil on a coil car with a hoop using a hoop guide of a banding machine and a hoop guide provided on the coil car, the hoop guide having an entrance portion into which the hoop is inserted and a main body portion continuous with the entrance portion, the width of the entrance opening of the entrance portion being wider than the width of the opening of the main body portion, and the width of the opening of the entrance portion becoming continuously smaller from the entrance toward the main body portion. Effect of the Invention

[0013] According to an aspect of the present invention, the entrance of the hoop guide is made wider, so that the hoop can easily enter the hoop guide even if the stopping position of the coil car for bundling the hoop is not precisely controlled.

[0014] Furthermore, according to this aspect of the invention, even if the coil car is misaligned, the widthwise tapered portion at the entrance guides the entering hoop toward the widthwise center of the hoop guide, allowing the hoop to pass through. In other words, according to this aspect of the invention, even if the coil car is misaligned, the hoop can be more reliably positioned at the widthwise center of the hoop guide. In this way, even if the coil car is misaligned, the entering hoop is positioned at the widthwise center of the hoop guide, preventing the hoop from becoming difficult to remove from the hoop guide even if the entrance of the hoop guide is made wider.

[0015] Furthermore, according to the aspects of the present invention, it is not necessarily necessary to control the coil car to improve the accuracy of the stop position. Therefore, there is no need to add detectors or modify the control for that purpose. As a result, according to the aspects of the present invention, there is also an effect that it can be done at low cost and with less labor. Note that the present invention may have a control to stop the coil car at the target position, but the control does not need to be more accurate than necessary. Furthermore, by using the hoop guide according to this aspect of the present invention, it becomes possible to bind the metal band coils with greater precision. [Brief description of the drawings]

[0016] [Figure 1] FIG. 2 is a schematic diagram illustrating a coil car on which a coil is mounted according to an embodiment based on the present invention, viewed from the axial direction of the coil. [Diagram 2] FIG. 13 is a top view illustrating a hoop guide installed in a coil car. [Diagram 3] FIG. 1 is a side view of a hoop guide installed on a coil car. [Figure 4] This is a schematic diagram of a hoop guide installed on a coil car, viewed from the inlet side (upstream side). [Diagram 5] FIG. 13 is a diagram illustrating the transportation of a coil. [Figure 6] 13A and 13B are diagrams illustrating the passing of a hoop when binding a coil. [Figure 7] 13A to 13C are diagrams illustrating an example of an operation for reducing the diameter of a ring-shaped hoop and bundling it. [Figure 8] 1A is a diagram showing a hoop that has been passed through a hoop guide installed in a coil car, and FIG. 1B is a diagram explaining the removal of the hoop from the hoop guide installed in the coil car. [Figure 9] FIG. 1 is a diagram illustrating a problem in a hypothetical example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] Next, an embodiment of the present invention will be described with reference to the drawings. In the following description, the hoop guide installed on the coil car will be referred to as a movable hoop guide, and the hoop guide of the banding machine will be referred to as a fixed hoop guide.

[0018] (composition) <Coil Car 3> The coil car 3 shown in FIG. 1 includes a saddle 2 for supporting a coil 10 at an upper position, and a movable hoop guide 1 . In this embodiment, the coil car 3 is moved toward the installation position of the banding machine by a conveyor (not shown). The coil car 3 may be configured to be movable by other moving means such as wheel drive.

[0019] <Saddle 2> In this embodiment, as shown in Fig. 1, the coil car 3 has a pair of left and right saddles 2 when viewed from the axial direction of the coil 10 to be placed. Furthermore, two saddles 2 are arranged on each of the left and right sides with a space between them in the axial direction of the coil 10 to be placed (see Fig. 5(b)). As a result, the coil car 3 of this embodiment has four saddles 2.

[0020] <Movable hoop guide 1> The movable hoop guide 1 is located between a pair of left and right saddles 2 when viewed from the axial direction of the coil 10 to be placed, as shown in Fig. 1. However, the movable hoop guide 1 is located in the space between the front and rear saddles 2 when viewed from the side of the coil 10 to be placed, as shown in Fig. 5(b).

[0021] 2 and 3, the movable hoop guide 1 is a long hollow member extending in the passing direction of the hoop 11 in top view. However, the movable hoop guide 1 has a slit 1d (gap) formed in the widthwise center thereof, which extends in the longitudinal direction of the movable hoop guide 1. Also, as shown in Fig. 3, the contour of the upper portion of the movable hoop guide 1 along the longitudinal direction is shaped approximately like a circular arc convex downward.

[0022] The movable hoop guide 1 of this embodiment includes a bottom plate portion 1a, left and right side plate portions 1b, and a top plate portion 1c, as shown in Fig. 4. The space surrounded by the bottom plate portion 1a, the left and right side plate portions 1b, and the top plate portion 1c is a hollow portion through which the hoop 11 passes.

[0023] The bottom plate portion 1a is divided into left and right portions at the center in the width direction. The top plate portion 1c is also divided into left and right portions at the center in the width direction, and the slit 1d extending in the longitudinal direction is formed. The left and right top plate portions 1c are shaped like a V-shape toward the slit 1d (the center in the width direction). In other words, the left and right top plate portions 1c are arranged in a convex mountain shape, and are shaped to facilitate ejection of the hoop 11 from the slit 1d.

[0024] As shown in Fig. 2, the movable hoop guide 1 of this embodiment is composed of an inlet portion 1A on the upstream side and a main body portion 1B on the downstream side along the longitudinal direction. The main body portion 1B is formed continuously with the downstream side of the inlet portion 1A. The width W2 of the opening of the main body portion 1B is, for example, 1.1 to 1.5 times the width of the hoop 11 to be passed through. The width W2 of the opening of the main body portion 1B is, for example, a constant width along the longitudinal direction.

[0025] <Entrance section 1A> In this embodiment, the opening cross section of the inlet portion 1A is set to have a larger opening width than the opening cross section of the main body portion 1B, as shown in Fig. 2, which is a top view, and Fig. 3, which is a view from the inlet 1Aa. The opening cross section of the inlet portion 1A has a continuously smaller opening width from the inlet 1Aa, where the hoop 11 enters, toward the main body portion 1B, and the left and right side plate portions 1b are arranged in a tapered shape when viewed from above, as shown in Fig. 2. Hereinafter, the opening width will also be referred to as the opening width.

[0026] The opening width W1 at the entrance 1Aa of the entrance section 1A should be set based on the allowable amount of deviation in the stopping position of the coil car 3, so that the tip of the hoop 11 passing through the fixed hoop guide 20Aa located upstream of the movable hoop guide 1 can enter the entrance section 1A. The opening width W1 of the inlet 1Aa is set to, for example, 1.2 times or more and 2 times or less the opening width W2 of the main body portion 1B.

[0027] Here, if the amount of width expansion of the entrance 1Aa of the entrance section 1A is small, the allowable amount of deviation of the stop position of the coil car 3 becomes small, and it may not be possible to prevent the hoop 11 from getting stuck at the entrance of the movable hoop guide installed on the coil car 3. In contrast, in this embodiment, the opening width W1 of the entrance 1Aa of the entrance section 1A is expanded to 1.2 times or more the opening width W2 of the main body section 1B, thereby making it possible to increase the allowable amount of deviation of the stop position of the coil car 3 compared to the conventional case. As a result, in this embodiment, it is not necessary to control the stop position of the coil car 3 with high precision.

[0028] On the other hand, if the opening width W1 of the entrance 1Aa of the entrance portion 1A is made too large, the entrance portion 1A may interfere with the saddle 2. For this reason, the preferable upper limit of the opening width W1 of the entrance 1Aa is set to twice the opening width W2 of the main body portion 1B. Also, if the opening width W1 of the entrance 1Aa is made too large, it is necessary to set the length L1 of the entrance portion 1A longer than necessary in order to set the inclination angle of the tapered portion formed by the entrance portion 1A within the range of inclination that allows the tip of the hoop 11 to be guided to the main body portion 1B. From this viewpoint as well, the opening width W1 of the entrance 1Aa is preferably no more than twice the opening width W2 of the main body portion 1B.

[0029] The length L1 of the inlet portion 1A is, for example, 20% to 40% of the length L2 of the entire movable hoop guide 1. The length L1 of the inlet portion 1A is preferably 50% or less, and more preferably 40% or less, of the overall length L2 of the movable hoop guide 1. In other words, in order to stably pass the hoop 11 guided toward the widthwise center side at the inlet portion 1A at its widthwise position, it is preferable that the length of the main body portion 1B is 50% or more of the overall length L2 of the movable hoop guide 1. Furthermore, if the ratio of the length L1 of the inlet portion 1A to the overall length L2 of the movable hoop guide 1 is 40% or less, the slit 1d of the movable hoop guide 1 is more likely to open left and right when the hoop is fastened (bundled).

[0030] On the other hand, when the guide of the hoop 11 by the tapered portion of the entrance portion 1A is taken into consideration, the ratio of the length L1 of the entrance portion 1A to the length L2 of the entire hoop guide is preferably 20% or more. In other words, if the ratio of the length L1 of the entrance portion 1A to the length L2 of the entire hoop guide is 20% or more, the tip of the entering hoop 11 is less likely to get stuck on the tapered portion of the side plate portion of the entrance portion 1A.

[0031] 2 shows a case in which the contour of the tapered portion along the longitudinal direction of the movable hoop guide 1 is formed linearly and the opening width changes linearly along the longitudinal direction, but this is not limited to this. As long as the contour shape of the side plate portion 1b is capable of guiding the tip end of the entering hoop 11, the contour along the longitudinal direction of the inlet portion 1A in top view may be curved.

[0032] <Restoration mechanism> The movable hoop guide 1 is provided with a restoration mechanism for restoring the width of the slit 1d, which is opened when the hoop 11 is discharged, to its initial value. The restoration mechanism includes left and right hanging plates 7, a base 4, and a spring 6.

[0033] The left and right hanging plates 7 are plate members extending downward (away from the top plate 1c) from the left and right bottom plate portions 1a as shown in Fig. 4. The left and right hanging plates 7 are disposed opposite each other in the width direction of the movable hoop guide 1. The base 4 is disposed between the left and right hanging plates 7 and fixed to the coil car 3. A rod body 5 protrudes from the base 4 toward the hanging plate 7 and penetrates the hanging plate 7. The tip of the rod body 5 has a large diameter portion.

[0034] Spring 6 is a coil spring that extends coaxially with rod body 5 between the large diameter portion of rod body 5 and the outer surface of hanging plate 7. Spring 6 is disposed so that a spring force acts on the large diameter portion of rod body 5 to urge hanging plate 7 toward the initial position.

[0035] <Banding Machine 20> 6 and 7, the banding machine 20 has multiple fixed hoop guides 20A provided at circumferential outer positions of the coil 10 to be bundled. The multiple fixed hoop guides 20A are arranged in a ring shape along the circumferential outer periphery of the coil 10 to be bundled. However, the row of the multiple fixed hoop guides 20A has an open portion where the movable hoop guide 1 is inserted.

[0036] Further, a bundling head 20B is disposed between the most upstream fixed hoop guide 20A and the most downstream fixed hoop guide 20A in the row of fixed hoop guides 20A. Each fixed hoop guide 20A is a hollow member arranged with its longitudinal direction facing the arrangement direction of the fixed hoop guides 20A, and has a slit formed on its inner diameter side (coil 10 side) through which the hoop 11 can be discharged. The slit is formed to extend over the entire longitudinal length of the fixed hoop guide 20A.

[0037] The width of the fixed hoop guide 20A located upstream of the position where the movable hoop guide 1 is disposed is set to be equal to the width of the main body 1B of the movable hoop guide 1, as shown in Fig. 2. On the other hand, the width of the fixed hoop guide 20A located downstream of the position where the movable hoop guide 1 is disposed is set to be wider than the width of the main body 1B of the movable hoop guide 1, as shown in Fig. 2.

[0038] By narrowing the width of the fixed hoop guide 20A upstream of the movable hoop guide 1, deviation of the hoop binding position in the longitudinal direction of the coil 10 is minimized. In addition, by widening the width of the fixed hoop guide 20A downstream of the movable hoop guide 1, the hoop 11 can be reliably inserted from the movable hoop guide 1. The number of fixed hoop guides 20A upstream of the movable hoop guide 1 is set to be greater than the number of fixed hoop guides 20A downstream of the movable hoop guide 1, allowing the hoop 11 to pass stably.

[0039] (Operation etc.) The wound coil 10 is placed from the reel 21 onto the saddle 2 of the coil car 3, as shown in Fig. 5(a)→(b). The coil car 3 carrying the coil 10 moves to the position of the banding machine 20, as shown in Fig. 5(b)→(c), and stops at or near the target position.

[0040] Thereafter, a banding operation of the coil 10 is carried out. The banding operation of the coil 10 is carried out by a process of threading the hoop 11 and a process of tightening the hoop. The banding operation of the coil 10 is carried out by a banding machine 20.

[0041] <Threading process for hoop 11> The process of threading the hoop 11 is a process of arranging the hoop 11 in an annular shape along the outer periphery in the circumferential direction of the coil 10. Next, a processing example of the process of threading the hoop 11 will be described. First, as shown in Fig. 6, a feeding device (not shown) feeds the hoop 11 into the most upstream fixed hoop guide 20A. The fed hoop 11 passes through the multiple fixed hoop guides 20A in the direction in which the fixed hoop guides 20A are arranged. As the hoop 11 passes through the fixed hoop guides 20A in the direction in which the fixed hoop guides 20A are arranged, as shown in Fig. 2, the hoop 11 passes from the fixed hoop guide 20Aa to the movable hoop guide 1, and then passes from the movable hoop guide 1 to the fixed hoop guide 20Ab.

[0042] <Hoop tightening process> The hoop tightening step is a step of binding the coil 10 with the hoop 11 by reducing the diameter of the hoop 11 that is disposed in a ring shape along the outer periphery of the coil 10 in the circumferential direction.

[0043] Next, an example of the hoop tightening process will be described. When the hoops 11 are arranged in a ring shape in the hoop guide in the direction of the hoop guide arrangement, the process of gripping the tip of the hoop 11 and tightening the hoop is performed as shown in FIG. 7 to bundle the hoops. When tightening the hoops 11, the hoops 11 in each hoop guide move toward the coil 10 as shown in FIG. 8(a)→(b) and push the left and right top plate parts 1c of each hoop guide toward the coil 10. As a result, the left and right top plate parts 1c of the hoop guide open to the left and right, and the slits 1d open to the left and right, and the hoops 11 are released (discharged) from the slits 1d to the coil 10. The hoop guide with the slits 1d open to the left and right returns to its initial position by the spring force of the spring 6. FIG. 8 shows an example of the state of the main body part 1B of the movable hoop guide 1.

[0044] In this embodiment, the opening width W1 of the entrance 1Aa of the movable hoop guide 1 installed on the coil car 3 is widened for the bundling operation of the coil 10. As a result, even if the coil car 3 stops at a position that is shifted from the target position, the hoop 11 can be easily passed from the fixed hoop guide 20Aa to the movable hoop guide 1 in the hoop 11 passing process. As a result, even if the coil car 3 stops at a position that is shifted from the target position, the hoop 11 can be arranged in a ring shape along the outer periphery of the coil 10 for bundling the coil 10.

[0045] In this embodiment, only the opening width W1 of the inlet portion 1A of the movable hoop guide 1 is made wide, but the opening width of the movable hoop guide 1 is not expanded over its entire length. Also, the opening width W1 of the inlet portion 1A is tapered in the longitudinal direction.

[0046] Therefore, the hoop 11 that enters the entrance 1A of the movable hoop guide 1 is guided toward the center by the tapered portion of the side plate 1b of the entrance 1A. Even if the widthwise position of the hoop 11 is relatively shifted to one side in the width direction of the movable hoop guide 1 due to a shift in the stopping position of the coil car 3 and enters the movable hoop guide 1, the widthwise position of the hoop 11 passing through the movable hoop guide 1 is guided toward the widthwise center of the movable hoop guide 1. Specifically, the widthwise position of the hoop 11 passing through the movable hoop guide 1 is kept within the opening width W1 of the main body 1B.

[0047] As a result, the hoop 11 that has passed through the movable hoop guide 1 can reliably enter the next fixed hoop guide 20Ab. In this embodiment, as shown in Fig. 2, the opening width of the next fixed hoop guide 20Ab is made wider to allow the hoop 11 to pass through more reliably.

[0048] Even if the stopping position of the coil car 3 is misaligned, the widthwise position of the hoop 11 inside the movable hoop guide 1 is guided to fall within the range of the opening width W2 of the main body portion 1B. As a result, the hoop 11 inside the movable hoop guide 1 after the threading process is reliably positioned near the widthwise center of the movable hoop guide 1. For this reason, when the hoop is fastened, the hoop 11 inside the movable hoop guide 1 is ensured to come out of the slit 1d in the top plate portion 1c in the same manner as in a movable hoop guide that does not have a wide portion.

[0049] Here, if the opening width of the movable hoop guide 1 is expanded over the entire length, the following problems may occur. That is, in the process of passing the hoop 11, the hoop 11 passes through the movable hoop guide 1 in a state of being shifted in one width direction by the amount of deviation of the stop position of the coil car 3, and is placed in the movable hoop guide 1. If the amount of deviation is shifted outward from the opening width W2 of the main body portion 1B, the slit 1d of the top plate portion 1c of the movable hoop guide 1 may not open to the left and right during hoop fastening, making it impossible to bind (see FIG. 9). In contrast, in this embodiment, as described above, the width of only the entrance portion 1A of the movable hoop guide 1 is expanded to prevent the hoop 11 from getting stuck at the entrance 1Aa of the movable hoop guide 1. Furthermore, by making the width the same as before except for the inlet portion 1A, when the hoop is fastened, the hoop 11 is pulled toward the coil 10, and a moment in the direction of opening to the left and right is applied to the top plate portion 1c of the movable hoop guide 1. As a result, the hoop 11 can be reliably removed from the movable hoop guide 1, and the coil 10 can be bound.

[0050] Here, the movable hoop guide 1 is installed between the saddles 2 as shown in FIG. 8. Therefore, if the opening width of the inlet 1A is too wide, when the movable hoop guide 1 opens left and right during the fastening of the hoop as shown in FIG. 8(b), the inlet 1A may collide with the saddle 2, and the movable hoop guide 1 may not open left and right sufficiently, resulting in poor removal of the hoop 11. For this reason, in this embodiment, the opening width W1 of the inlet 1Aa of the inlet 1A is set to be less than twice the opening width W1 of the main body 1B. That is, it is necessary to specify the upper limit of the opening width W1 of the inlet of the inlet 1A so that the hoop guide does not interfere with the saddle 2 when removing the hoop 11.

[0051] On the other hand, when the width of the entrance 1A is small, the tolerance of the stop position deviation of the coil car 3 is small. In this embodiment, the opening width W1 of the entrance 1Aa of the entrance 1A is widened, so that the tolerance of the stop position deviation of the coil car 3 can be made larger than in the past. This eliminates the need to control the stop of the coil car 3 with high precision as in the prior art.

[0052] As described above, according to this embodiment, the entrance 1Aa of the movable hoop guide 1 is made wide, so that the hoop 11 can enter the movable hoop guide 1 even if the stopping position of the coil car 3 for hoop binding deviates from the target position. Furthermore, according to this aspect of the invention, the tapered side plate portion 1b of the entrance portion 1A guides the entering hoop 11 toward the center in the width direction of the movable hoop guide 1. As a result, the hoop 11 can be passed through the movable hoop guide 1 closer to the center more reliably.

[0053] At this time, the entering hoop 11 passes through the widthwise center of the movable hoop guide 1, so that even though it has a wide portion, the hoop 11 is just as likely to come off the movable hoop guide 1 as a movable hoop guide 1 that does not have a wide portion.

[0054] In addition, according to this embodiment, since it is not necessarily required to control the coil car 3 to improve the accuracy of the stop position, there is no need to add detectors or modify the control for that purpose. As a result, according to this aspect of the present invention, there is also an effect that it can be handled at low cost and with less labor. In addition, the present disclosure may have a control for stopping the coil car 3 at a target position, but the control does not need to be made more precise than necessary.

[0055] Moreover, according to this embodiment, by simply changing the shape of the entrance portion 1A of the movable hoop guide 1, it is possible to pass the plates through the hoop 11 and to bind them with the hoop 11 even if the stopping position of the coil car 3 is shifted. As described above, according to this embodiment, the movable hoop guide 1 installed on the coil car 3 and the banding machine 20 enable the coil 10 to be bound more reliably and accurately.

[0056] (Example) In the comparative example in which the inlet of the movable hoop guide was not widened, the incidence of poor bundling due to deviation of the stopping position of the coil car 3 was 0.72%, and the occurrence frequency was approximately 1.1 times per day.

[0057] On the other hand, when the opening width W1 of the entrance 1Aa of the movable hoop guide 1 was changed based on the present invention to 1.2 times the opening width W2 of the main body portion 1B, the occurrence frequency was reduced from approximately 1.1 times / day to 0.2 times / day, even without changing the conditions for stopping the coil car 3.

[0058] (others) The present disclosure may also have the following configuration. (1) A hoop guide installed on a coil car, which is used to bind a metal strip coil on the coil car with a hoop using a hoop guide of a banding machine and a hoop guide provided on the coil car, an inlet portion into which the hoop is inserted and a main body portion continuous with the inlet portion; The width of the inlet opening of the inlet portion is wider than the width of the opening of the main body portion, The width of the opening of the inlet portion decreases continuously from the inlet toward the main body portion. (2) The width of the inlet opening is between 1.2 and 2 times the width of the opening of the main body. (3) The length of the inlet portion is between 20% and 40% of the entire length of the hoop guide. (4) A method for bundling a metal strip coil, comprising bundling a metal strip coil using a hoop guide according to the present disclosure. [Explanation of symbols]

[0059] 1 Movable hoop guide 1A Entrance 1Aa entrance 1B Main body 1d slit 2. Saddle 3. Coil Car 10 Coil 11. Hoop 20 Banding Machine 20A Fixed hoop guide

Claims

1. A hoop guide installed on a coil car, which is used to bind a metal strip coil on the coil car with a hoop using a hoop guide of a banding machine and a hoop guide provided on the coil car, an inlet portion into which the hoop is inserted and a main body portion continuous with the inlet portion; The width of the inlet opening of the inlet portion is wider than the width of the opening of the main body portion, The width of the opening of the inlet portion decreases continuously from the inlet toward the main body portion. Hoop guide.

2. The width of the inlet opening is 1.2 times or more and 2 times or less than the width of the opening of the main body portion.

2. The hoop guide according to claim 1.

3. The length of the inlet portion is 20% or more and 40% or less of the entire length of the hoop guide. The hoop guide according to claim 1 or 2.

4. A metal strip coil is bound using the hoop guide according to claim 1 or 2. A method for bundling metal strip coils.

5. A metal strip coil is bound using the hoop guide according to claim 3. A method for bundling metal strip coils.

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