Fixture and steel strip coil conveying method

Abstract

To provide a fixture or the like capable of improving the detection accuracy of the gripped state of a steel strip coil by a coil lifter.SOLUTION: This fixture is attached to the inner peripheral surface of a steel strip coil having a steel sleeve inserted thereinto. The fixture is formed into a plate shape. The fixture has a thickness of 100-110% with respect to that of the steel sleeve. Accordingly, when the steel strip coil is gripped by a coil lifter, the steel sleeve looks to be extended in the axial direction of the steel strip coil by the fixture. Thus, in the inner peripheral surface of the steel strip coil, a step formed in the axial direction is removed, enabling the detection accuracy of the gripped state of the steel strip coil by the coil lifter to be increased.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a jig that is attached to the inner peripheral surface of a steel strip coil into which a steel sleeve has been inserted, and a method for transporting a steel strip coil. [Background technology]

[0002] The steel strip coil is formed by winding a thin steel sheet on a reel at the exit side of the line. As described in Patent Document 1, for example, a steel sleeve is inserted into the steel strip coil to prevent deformation of the inner diameter of the steel strip coil.

[0003] A coil lifter is used to transport steel strip coils. The coil lifter has a pair of claws that are inserted into one end and the other end of the inner diameter of the steel strip coil to grip the steel strip coil.

[0004] Conventionally, it has been practiced to detect whether a steel strip coil is placed on the claws of a coil lifter. For example, Patent Document 2 discloses that a detection switch is provided on the claws, and that the presence of a steel strip coil on the claws is detected by physical contact between the inner diameter of the coil and the detection switch. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Utility Model Application Publication No. 7-37410 [Patent Document 2] Registered Utility Model No. 3125035 Summary of the Invention [Problem to be solved by the invention]

[0006] The steel sleeve is provided along the axial direction of the steel strip coil. The length of the steel sleeve in the axial direction of the steel strip coil is shorter than that of the steel strip coil. That is, the inner peripheral surface of the steel strip coil has a portion that contacts the steel sleeve and a portion that does not contact the steel sleeve. Therefore, a step occurs in the axial direction on the inner peripheral surface of the steel strip coil.

[0007] Therefore, the method described in Patent Document 1 has the problem that even when the coil lifter is gripping the steel strip coil, the detection switch does not come into contact with the inner surface of the steel strip coil, and therefore it is not possible to detect that the steel strip coil is being gripped.

[0008] For this reason, in the past, it was necessary to prepare multiple steel sleeves according to the axial length of the steel strip coil, which required major equipment modifications and resulted in the problem of significant costs.

[0009] The present invention has been made in consideration of the above problems, and aims to provide a jig or the like that can improve the detection accuracy of the gripping state of a steel strip coil in a coil lifter. [Means for solving the problem]

[0010] In order to solve the above problems, the present invention has the following features. [1] A jig attached to the inner circumferential surface of a steel strip coil into which a steel sleeve is inserted, The jig is formed in a plate shape and has a thickness that is 100 to 110% of the thickness of the steel sleeve. [2] provided on one end side and the other end side of the steel sleeve, A jig as described in [1], wherein the axial length of the steel strip coil in one jig is less than half the length obtained by subtracting the axial length of the steel sleeve from the axial length of the steel strip coil. [3] A jig as described in [1] or [2], wherein the length of the jig in the circumferential direction of the steel strip coil is at least 1 / 4 of the inner circumference length of the steel strip coil. [4] The jig according to any one of [1] to [3], having a magnetically attachable portion formed on one surface so as to be magnetically attachable to the inner peripheral surface of the steel strip coil. [5] A method for conveying a steel strip coil using the jig according to any one of [1] to [4], an attachment step of attaching the jig to the inner peripheral surface of the steel strip coil; a gripping step of gripping the steel strip coil with a gripping tool; A method for transporting a steel strip coil, comprising: a transporting step of transporting the steel strip coil while the steel strip coil is gripped by the gripping tool. [6] A method for transporting a steel strip coil as described in [5], wherein in the attachment process, the jig is attached at a position adjacent to the steel sleeve in the axial direction of the steel strip coil. [Effects of the Invention]

[0011] According to the jig etc. of the present invention, the jig has a thickness that is 100 to 110% of the thickness of the steel sleeve. Therefore, when the steel strip coil is gripped by the coil lifter, the jig makes it appear as if the steel sleeve is extended in the axial direction of the steel strip coil. This eliminates steps formed in the axial direction on the inner peripheral surface of the steel strip coil, making it possible to improve the accuracy of detecting the gripping state of the steel strip coil in the coil lifter. [Brief explanation of the drawings]

[0012] [Figure 1] FIG. 2 is an explanatory diagram showing the configuration of a jig. [Figure 2] FIG. [Figure 3] FIG. 10 is an explanatory diagram showing how a steel strip coil is gripped by a coil lifter. [Figure 4] 1 is a cross-sectional side view of a steel strip coil viewed from the axial direction. [Figure 5] FIG. 1 is a flow chart showing a method for transporting a steel strip coil. [Figure 6] FIG. 6 is an explanatory diagram showing an aspect of the gripping step in step S02 of FIG. 5. DETAILED DESCRIPTION OF THE INVENTION

[0013] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Fig. 1 shows the configuration of a jig 100. As shown in Fig. 1, the jig 100 is formed, for example, in the shape of a plate extending in the axial direction (hereinafter also referred to as the width direction) of the steel strip coil. In this embodiment, the jig 100 is formed in the shape of a flat plate.

[0014] The jig 100 has a base 10 and an attachment portion 20 provided on the base 10. The base 10 is not particularly limited as long as it has a material and physical properties that can be detected by the detection switch provided on the coil lifter, but for example, a flexible material such as rubber can be used.

[0015] The mounting portion 20 is provided on one surface of the base 10, for example, on the upper surface. The mounting portion 20 is not particularly limited as long as it is a member that can be attached to the inner peripheral surface of the steel strip coil, but examples include a magnet, a suction cup, and an adhesive material. It is preferable to use a magnet as the mounting portion 20, as it can be easily attached to the inner peripheral surface of the steel strip coil and can be used repeatedly. When the mounting portion 20 is configured using a magnet, the mounting portion 20 functions as a magnetically attachable portion formed to be magnetically attachable to the inner peripheral surface of the steel strip coil.

[0016] The jig 100 may have, for example, a base 10 made of rubber and an attachment portion 20 made of a so-called rubber magnet, which is formed by mixing magnetic powder with a binder material such as rubber or plastic. By forming the jig 100 in this manner, when it is attached to the inner peripheral surface of the steel strip coil, it can be deformed to fit the shape of the inner peripheral surface. Furthermore, versatility can be increased by cutting the jig 100 according to the axial length of the steel strip coil 30.

[0017] The jig 100 is formed in a rectangular shape when viewed from above. The jig 100 has a short-side length L1 and a long-side length W. The short-side length L1 of the jig 100 corresponds to the axial length of the steel strip coil when the jig 100 is attached to the inner surface of the steel strip coil. The short-side length L1 of the jig 100 is set according to the axial length of the steel strip coil and the length of the steel sleeve. The short-side length L1 of the jig 100 is not particularly limited, but is formed to be, for example, approximately 100 mm.

[0018] FIG. 2 is an enlarged perspective view of the jig 100. As shown in FIG. 2, the thickness T of the jig 100 is the sum of the thickness T1 of the mounting portion 20 and the thickness T2 of the base portion 10. In the example shown in FIG. 2, the thickness T1 of the mounting portion 20 is formed to be thicker than the thickness T2 of the base portion 10. The thickness T1 of the mounting portion 20 is not particularly limited, but can be, for example, 11 mm. The thickness T2 of the base portion 10 is not particularly limited, but can be, for example, 3 mm.

[0019] 3 shows a state in which the steel strip coil 30 is gripped by the coil lifter 40. The coil lifter 40, which serves as a gripping tool for gripping the steel strip coil 30, has a pair of claws 41 formed in an L-shape.

[0020] The pair of claws 41 are arranged opposite to each other. The pair of claws 41 are provided with a gap between them in the opposing direction. The pair of claws 41 are provided movably so that the gap between them in the opposing direction can be narrowed or widened. The length of the claws 41 in the opposing direction is not particularly limited, but can be, for example, 350 mm.

[0021] The pair of claws 41 are provided with a detection sensor 42 at the tip end in the opposing direction, which is a sensor that detects that the steel strip coil 30 is placed on the claws 41. The detection sensor 42 is provided at the part of the claws 41 that comes into contact with the steel strip coil 30, i.e., on the placement surface. The detection sensor 42 is not particularly limited, but can be provided, for example, at a position 200 mm from the inner surface of the claws 41 in the opposing direction.

[0022] The detection sensor 42 may be either a contact type or a non-contact type sensor. As a contact type sensor, for example, a limit switch that detects the force acting on the claw portion 41 when the steel strip coil 30 is placed on the claw portion 41 can be used. As a non-contact type sensor, for example, an inductive proximity switch that detects the presence of metal can be used. In the following, in this embodiment, an example in which a limit switch is used as the detection sensor 42 will be described.

[0023] The steel strip coil 30 is formed in a hollow cylindrical shape. The steel strip coil 30 is formed with an axial length L2. The axial length L2, which is also the plate width of the steel strip coil 30, is not particularly limited, but can be, for example, 1300 mm. A steel sleeve 31 is inserted into the inner peripheral surface of the steel strip coil 30. The steel sleeve 31 is formed in a hollow cylindrical shape.

[0024] The steel sleeve 31 is formed with an axial length L3. The axial length L3 of the steel sleeve 31 is not particularly limited, but can be set to, for example, 900 mm.

[0025] The steel sleeve 31 is disposed, for example, at the midpoint of the axial length L2 of the steel strip coil 30. The length from one end of the steel sleeve 31 to the axial end of the steel strip coil 30 is L4. Similarly, the length from the other end of the steel sleeve 31 to the axial end of the steel strip coil 30 is L4. That is, for example, if the length L2 of the steel strip coil 30 is 1300 mm and the length L3 of the steel sleeve 31 is 900 mm, the length L4 is 200 mm.

[0026] The distance from one end of the steel sleeve 31 to the inner surface of the steel strip coil 30 at which the detection sensor 42 can sense pressure is L5. The distance from the other end of the steel sleeve 31 to the inner surface of the steel strip coil 30 at which the detection sensor 42 can sense pressure is L5.

[0027] 3, the jig 100 is provided on one end side and the other end side of the steel sleeve 31. Specifically, one side of the jig 100 is provided in contact with one end side of the steel sleeve 31. The other side of the jig 100 is provided in contact with the other end side of the steel sleeve 31.

[0028] The length L1 of the jig 100 in the short side direction should be at least the distance L5. In other words, the length L1 of the jig 100 in the short side direction should be at least the distance L5 from one end or the other end of the steel sleeve 31 to a position where the detection sensor 42 can detect it when the coil lifter 40 grips the steel strip coil 30. By forming the jig 100 in this manner, the jig 100 can be placed at a position where the detection sensor 42 can detect it. This can improve the accuracy with which the detection sensor 42 detects the placement of the steel strip coil 30.

[0029] Furthermore, the transverse length L1 of one jig 100 is equal to or less than half (L4) of the length (2L4) obtained by subtracting the axial length L3 of the steel sleeve 31 from the axial length L2 of the steel strip coil 30. In other words, the transverse length L1 of the jig 100 is equal to or less than (L2-L3) / 2≦L4.

[0030] Forming the jig 100 in this manner makes it possible to prevent the jig 100 from protruding from the end of the steel strip coil 30. This makes it possible to prevent the jig 100 from interfering with the claw portion 41 and being damaged when the steel strip coil 30 is transported by the coil lifter 40.

[0031] 2 is 100 to 110% of the thickness T3 of the steel sleeve. The thickness T3 of the steel sleeve is not particularly limited, but can be 14 mm.

[0032] By making the thickness T of the jig 100 100 to 110% of the thickness T3 of the steel sleeve, it is possible to eliminate the step formed in the axial direction of the steel strip coil 30 on the inner surface of the coil 30 facing the detection sensor 42 of the coil lifter 40.

[0033] By making the thickness T of the jig 100 100% or more of the thickness of the steel sleeve, the step can be sufficiently eliminated. By making the thickness T of the jig 100 110% or less of the thickness of the steel sleeve, the tips of the claws 41 of the coil lifter 40 do not come into contact with the steel sleeve 31, and the load is preferentially applied to the jig 100, preventing damage to the jig 100. Furthermore, by making the thickness T of the jig 100 110% or less of the thickness of the steel sleeve, the amount of deformation of the jig can be reduced, preventing accelerated deterioration of the jig 100.

[0034] FIG. 4 shows a side cross section of the steel strip coil 30 as viewed from the axial direction. As shown in FIG. 4, the circumferential length L6 of the steel strip coil 30 in the jig 100 is preferably at least 1 / 4 of the inner circumferential length L7 of the steel strip coil 30. Furthermore, it is preferable that the circumferential length L6 of the steel strip coil 30 in the jig 100 is not more than 1 / 2 of the inner circumferential length L7 of the steel strip coil 30. For example, when the inner circumferential length L7 of the steel strip coil 30 is 1700 mm, the circumferential length L6 of the steel strip coil 30 in the jig 100 is preferably at least 425 mm. Similarly, the circumferential length L6 of the steel strip coil 30 in the jig 100 is preferably not more than 850 mm.

[0035] The circumferential length L6 of the steel strip coil 30 of the jig 100 corresponds to the longitudinal length W shown in Figure 1. The circumferential length L6 of the steel strip coil 30 is not particularly limited, but is formed to be, for example, about 780 mm.

[0036] After the jig 100 is attached, the steel strip coil 30 is transported by the coil lifter 40. At that time, the steel strip coil 30 may rotate around its axis. The length L6 of the jig 100 in the circumferential direction of the steel strip coil 30 is at least 1 / 4 of the inner circumference length L7 of the steel strip coil 30, so that the detection sensor 42 can be brought into contact with the jig 100 even if the steel strip coil 30 rotates in this way. Furthermore, by making the length L6 of the jig 100 in the circumferential direction of the steel strip coil 30 at most 1 / 2 of the inner circumference length L7 of the steel strip coil 30, workability can be improved.

[0037] Fig. 5 is a flow diagram showing a method for transporting a steel strip coil. As shown in Fig. 5, the method for transporting a steel strip coil includes an attachment step of attaching the jig to the inner peripheral surface of the steel strip coil (step S01).

[0038] In the mounting process of step S01, a jig 100 is selected that does not protrude from the axial end of the steel strip coil. Specifically, a jig 100 is selected in which the length from one end or the other end of the steel sleeve 31 to the axial end of the steel strip coil 30 is a length L1 that is less than or equal to L4.

[0039] Furthermore, when the jig 100 is attached to the steel strip coil 30, the jig is attached at a position adjacent to the steel sleeve 31 in the axial direction of the steel strip coil 30. For example, the jig 100 is attached to the steel strip coil 30 by abutting against the steel sleeve 31.

[0040] Next, a gripping process is performed in which the steel strip coil 30 is gripped by a coil lifter 40, which is a gripping tool for gripping the steel strip coil 30 (step S02). Finally, a transport process is performed in which the steel strip coil 30 is transported while being gripped by the coil lifter 40 (step S03). After the transport process of step S03 is completed, the jig 100 is removed at a desired timing.

[0041] Fig. 6 is a diagram showing the gripping process of step S02 in Fig. 5. In the gripping process of step S02, the claws 41 are inserted into the inner diameter of the steel strip coil 30 and then pulled upward. At this time, the detection sensor 42 comes into contact with the jig 100 and is pressed by the jig 100 when pulled upward. This allows the detection sensor 42 to detect that the steel strip coil 30 is placed on the coil lifter 40.

[0042] As described above, according to the jig 100 etc. of the present invention, the thickness T of the jig 100 is 100 to 110% of the thickness T3 of the steel sleeve 31. Therefore, when the steel strip coil 30 is gripped by the coil lifter 40, the jig 100 makes it appear as if the steel sleeve 31 is extended in the axial direction of the steel strip coil 30.

[0043] This eliminates steps formed in the axial direction on the inner peripheral surface of the steel strip coil 30. In other words, the detection sensor 42 of the coil lifter 40 can come into contact with the inner peripheral surface of the steel strip coil via the jig 100. This makes it possible to improve the detection accuracy of the gripping state of the steel strip coil 30 in the coil lifter 40.

[0044] In the above embodiment, the jig 100 is described as being formed in a flat plate shape. However, the jig is not limited to this shape, and may have, for example, an end face formed in an arc shape when viewed from the longitudinal direction. When forming the jig in this manner, the curvature of the arc should be formed according to the curvature of the inner peripheral surface of the steel strip coil to be attached.

[0045] Furthermore, although an example has been described in which a pressure-sensitive sensor is used as the detection sensor 42, this is not limiting and, for example, a proximity switch, which is a non-contact sensor, may also be used. When a proximity switch is used as the non-contact sensor, for example, the detection accuracy may be reduced depending on the thickness T3 (e.g., 14 mm) of the steel sleeve 31. Therefore, in such a case, it is preferable to form the base 10 from a conductor. This improves the detection accuracy of the detection sensor 42. [Explanation of symbols]

[0046] 100 Jig 10 base 20 Mounting part (magnetic part) 30 Steel strip coils 31 Steel sleeve 40 Coil lifter (gripping tool) 42 Detection sensor (sensor)

Claims

1. A jig attached to the inner circumferential surface of a steel strip coil into which a steel sleeve is inserted, A jig formed in the shape of a plate and having a thickness that is 100 to 110% of the thickness of the steel sleeve.

2. provided on one end side and the other end side of the steel sleeve, A jig as described in claim 1, wherein the axial length of the steel strip coil in one jig is less than half the length obtained by subtracting the axial length of the steel sleeve from the axial length of the steel strip coil.

3. The jig according to claim 1, wherein the length of the jig in the circumferential direction of the steel strip coil is at least 1 / 4 of the inner circumferential length of the steel strip coil.

4. The jig according to claim 2, wherein the length of the jig in the circumferential direction of the steel strip coil is at least 1 / 4 of the inner circumferential length of the steel strip coil.

5. 5. The jig according to claim 1, further comprising a magnetically attachable portion formed on one surface thereof so as to be magnetically attachable to the inner peripheral surface of the steel strip coil.

6. A method for transporting a steel strip coil using the jig according to any one of claims 1 to 4, an attachment step of attaching the jig to the inner peripheral surface of the steel strip coil; a gripping step of gripping the steel strip coil with a gripping tool; A method for transporting a steel strip coil, comprising: a transporting step of transporting the steel strip coil while the steel strip coil is gripped by the gripping tool.

7. A method for transporting a steel strip coil using the jig according to claim 5, an attachment step of attaching the jig to the inner peripheral surface of the steel strip coil; a gripping step of gripping the steel strip coil with a gripping tool; A method for transporting a steel strip coil, comprising: a transporting step of transporting the steel strip coil while the steel strip coil is gripped by the gripping tool.

8. 8. The method for transporting a steel strip coil according to claim 6, wherein in the attaching step, the jig is attached at a position adjacent to the steel sleeve in the axial direction of the steel strip coil.

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