JP2983534B1 - Coil protector and forming equipment - Google Patents

Abstract

An object of the present invention is to prevent breakage of wrapping paper on the inner peripheral surface of a coil when the coil is lifted. SOLUTION: An inner diameter ring 23 used by being attached to an inner diameter corner of a coil 24 is in contact with an end face of the coil 24, and is connected to an outward flange portion 27 extending radially outward, in an L-shape therewith. A cylindrical portion 26 that is in contact with the inner peripheral surface of the coil 24 and extends inward in the axial direction. Lifting arm 41
A pressing projection 48 for turning on / off the lifting detection switch is provided on the horizontal arm 44 so as to protrude upward. The horizontal arm 44 is moved until the vertical arm 43 of the lifting arm 41 contacts the end face of the coil 24. When the coil 24 is lifted by being inserted into the center hole of the inner ring 24, the length L1 of the cylindrical portion 26 of the inner diameter ring 23 is set so that the length L1 of the cylindrical portion 26 is longer than the distance LS between the vertical arm 43 and the pressing projection 48. Set.
As a result, the pressing protrusion 48 and the wrapping paper 2
9 is avoided, and the wrapping paper 29 is prevented from being damaged.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coil protector which is mounted on a corner of an inner diameter of a coil when the coil is packed and which is used for protecting the coil, and a molding apparatus capable of suitably forming the coil protector. About.

[0002]

2. Description of the Related Art A coil product such as a steel strip (hereinafter referred to as a coil) is packed and shipped in order to deliver the product in perfect condition to a customer. Although packing is performed in various forms according to an agreement with a consumer, it is roughly divided into a standard packing used for general packing and a heavy packing mainly used for export packing. Standard packing is performed by wrapping the inner and outer peripheral surfaces and end surfaces of the coil with wrapping paper, attaching coil protectors called outer and inner rings to the outer and inner corners of the coil, and binding them with a binding hoop. . Since the wrapping paper 3 is folded when wrapping the end surface and the inner peripheral surface of the coil 1, the folds 4 are formed so as to overlap as shown in FIG.

FIG. 13 is a perspective view showing a simplified configuration of a conventional inner diameter ring 6. As shown in FIG. The shape of the inner diameter ring 6 is substantially ring-shaped, and is divided at one location in the circumferential direction. The inner ring 6 includes a cylindrical portion 10 extending along the axis 9 and an outward flange portion 11 extending radially outward.
And the cylindrical portion 10 and the outward flange portion 11 are connected in an L-shape. The dimensions of the inner ring are, for example, plate thickness:
The outer diameter of the cylindrical portion 10 is 495 mm, the axial length of the cylindrical portion 10 is 60 mm, and the radial length of the outward flange portion 11 is 50 mm. As described above, the lengths of the cylindrical portion 10 and the outward flange portion 11 of the conventional inner diameter ring 6 are set to be relatively short. The reason for this is that the conventional inner diameter ring 6 is intended only to protect the inner diameter corner of the coil 1.

FIG. 14 is a front sectional view showing a state in which the coil 1 to which the conventional inner ring 6 is mounted is lifted. The coil 1 is engaged with an L-shaped lifting arm 13 and lifted. The lifting arm 13 extends in the up-down direction, and a vertical arm 15 abutting on the coil end surface, and a horizontal arm 1 extending horizontally to be connected to the vertical arm 15 and inserted into the center hole of the coil 1.
4 On the upper surface of the horizontal arm 14, a projection 16 for turning on / off the lifting detection switch is provided.
Are provided so as to protrude upward from the upper surface of the upper surface and to be vertically displaceable. The upper surface of the horizontal arm 14 is curved corresponding to the curved surface of the inner peripheral surface of the coil. The inner diameter ring 6 is mounted at the corner of the inner diameter of the coil, and its cylindrical portion 10 contacts the inner peripheral surface of the coil, and the outward flange portion 11 contacts the end surface of the coil 1. As described above, since the axial length of the cylindrical portion 10 of the inner diameter ring 6 is set to a relatively short length, when the horizontal arm 14 is inserted into the coil center hole, the protrusion 16 It is located on the inner side of the inner peripheral surface of the coil with respect to the cylindrical portion 10 and directly contacts the wrapping paper 3.

The inner ring 6 is formed by, for example, forming a cut steel plate into a cylindrical shape, inserting the cut steel plate into a mold, and forming the outward flange portion 11 by press working or spinning.

[0006]

FIG. 15 is a cross-sectional view of FIG.
It is the side sectional view seen from V-XV. When the conventional inner diameter ring 6 is mounted on the coil 1 placed with the axis horizontal and the lifting arm 13 is inserted into the coil center hole to lift the coil 1, there are the following problems. When the lifting arm 13 exists in the vertical plane 18 including the axis of the coil 1 as shown in FIG.
Lifts the coil 1 vertically upward without moving in the circumferential direction of the coil 1. On the other hand, when the lifting arm 13 is located at a position displaced in the circumferential direction from the vertical plane 18 as shown in FIG. 15 (2), the lifting arm 13 moves toward the vertical plane 18 by an arrow 19 during lifting. Move in the circumferential direction as shown by. If the moving direction 19 during the movement of the lifting arm 13 is opposite to the direction in which the wrapping paper 3 overlaps as shown in FIG.
There is a problem that the wrapping paper 3 is broken by the hook 6 being caught by the fold 4. Since the breakage of the wrapping paper 3 results in a reduction in the rust-preventing power of the wrapping paper 3, it has been strongly desired to solve this problem. Further, in the conventional forming process of the inner ring 6, as described above, since the forming process of the cylindrical shape and the forming process of the outward flange portion are performed by different devices, there is a problem that the production efficiency is low. is there.

An object of the present invention is to provide a coil protector which can solve the above-mentioned problem and can prevent the wrapping paper on the inner peripheral surface of the coil from being damaged when the coil is lifted.
It is another object of the present invention to provide a coil protector molding facility with good production efficiency.

[0008]

SUMMARY OF THE INVENTION The present invention is directed to a method of mounting a coil, which is mounted on a corner of an inner diameter of a coil which is placed with its axis horizontal and which is engaged with a coil suspender in a center hole of the coil. In a ring-shaped coil protector that protects the inner diameter corner,
An outward flange portion abutting on the end surface of the coil and extending radially outward; and a tubular portion extending in an L-shape with the outward flange portion and abutting on the inner peripheral surface of the coil and extending inward in the axial direction. The coil lifting device has an L-shaped lifting arm, the lifting arm extends in the up-down direction, a vertical arm abutting on the coil end face, and extends horizontally in an L-shape with the vertical arm; A horizontal arm inserted into the center hole, a lifting detection switch is provided on the horizontal arm, and a pressing projection for turning on / off the lifting detection switch protrudes upward from the upper surface of the horizontal arm on the upper surface of the horizontal arm. The coil protector is provided so as to be displaceable in a direction, and is formed so that the length of the cylindrical portion is longer than the interval between the vertical arm and the pressing protrusion.

According to the present invention, the length of the cylindrical portion of the coil protector is formed so as to be longer than the distance between the vertical arm of the lifting arm and the pressing projection. Abut securely. As a result, direct contact between the pressing protrusion and the wrapping paper folded into the coil center hole is avoided, so that even if the pressing protrusion moves during lifting of the coil, the wrapping paper is prevented from being damaged, and the rust-preventive force of the wrapping paper is reduced. improves.

Further, the present invention has an L-shaped lifting arm engaged with the coil, and the lifting arm extends vertically.
A vertical arm abutting on the coil end face, and a horizontal arm connected to the vertical arm in an L-shape and extending horizontally and inserted into the center hole of the coil, the horizontal arm is provided with a lifting detection switch, A coil hanger is provided on the upper surface, which is provided with a push protrusion for turning on / off the lifting detection switch upward from the upper surface of the horizontal arm so as to be displaceable in the vertical direction. The inner and outer peripheral surfaces and the end surface of the coil are packed with wrapping paper. And an abutting end face of the coil via a wrapping paper, an outwardly extending flange portion extending outward in the radial direction, and an L-shape connected to the outwardly facing flange portion, and abutting the inner circumferential surface of the coil via the wrapping paper. A ring-shaped coil protector including a cylindrical portion extending inward in the axial direction in contact with the cylindrical portion and having a length longer than the interval between the vertical arm and the pressing protrusion is provided at the inner diameter corner of the coil. Put on,
Insert the horizontal arm of the lifting arm into the center hole of the coil, lift the coil lifting tool upward after the vertical arm contacts the coil end surface, contact the pressing projection with the cylinder, and turn on the lifting detection switch A coil lifting method characterized by lifting while generating an alarm.

According to the present invention, a lifting detection switch is provided on the lifting arm of the coil lifting device, and an alarm is issued when the lifting detection switch is turned on, thereby greatly improving the safety of lifting and transporting the coil. I do.

Further, according to the present invention, there is provided a side guide means for guiding an L-shaped section member in which one side extending substantially horizontally and the other side extending substantially vertically upward in an L-shape to the downstream side; An L-shaped cross-section member having a lower roll provided on the delivery side and having a horizontal axis whose both ends are rotatably supported, and an upper roll having a horizontal axis whose only one end is rotatably supported One side of the upper roll is interposed between the upper and lower rolls, and the roll gap distribution between the upper and lower rolls is adjusted and rolled so as to decrease from the other end to the one end of the upper roll. A forming machine that forms a ring by bending in a horizontal plane, and L on the side of the other end of the upper roll
A first guide means which is provided to face the other side of the L-shaped section at an interval larger than the thickness of the other side of the section and guides the other side of the L-section to the downstream side through the gap; And a second guide means provided on the outlet side and guiding the other side of the L-shaped cross section to the downstream side in a curved state.

According to the present invention, rolling is performed in a state in which one side of the L-shaped section is adjusted so that the roll gap distribution between the upper and lower rolls decreases from the other end to the one end of the upper roll. Therefore, the pressure extension at the position where the roll gap is small is longer than the pressure extension at the position where the roll gap is large, and the L-shaped section material after rolling is curved. Thus, one side of the rolled L-shaped section member forms an outward flange portion extending outward in the radial direction, and the other side not subjected to the rolling process forms a cylindrical portion extending in the axial direction. In addition, the first unrolled upper roll is spaced apart from the other end of the upper roll by an interval larger than the thickness of the other side of the L-shaped cross-section member.
Since the guide means is provided, the other side of the L-shaped section member extending substantially vertically upward can be guided to the downstream side through the gap. Further, it is possible to prevent the upper roll from moving to the outside of the other end of the L-shaped section material during rolling.

The molding machine of the present invention comprises a first bearing box rotatably supporting one end of an upper roll via a roll shaft, and rotating one end and the other end of a lower roll via a roll shaft. Second and third bearing housings respectively supporting freely;
A first housing erected on one side of one end of the upper and lower rolls and holding the first and second bearing housings slidably in the vertical direction; and a first housing erected on the side of the other end of the lower roll. A second housing for holding the third bearing box slidably in the vertical direction, a displacement adjusting device provided in the first housing for displacing the first bearing box in the vertical direction, a first bearing box and a second bearing Spring means for urging the first and second bearing housings vertically apart from each other, and provided on the side opposite to the upper and lower rolls of the first housing. And a drive device for synchronously rotating the upper and lower rolls.

According to the present invention, one end of the upper roll is rotatably supported by the first bearing housing via the roll shaft,
Since the roll shaft and the bearing box are not provided at the other end of the upper roll, the amount of deflection of the upper roll during rolling increases from one end to the other end. by this,
Roll gap between upper and lower rolls when one side of an L-shaped section is rolled between an upper roll whose other end is not supported and a lower roll whose both ends are rotatably supported. The distribution is automatically adjusted to decrease from the other end of the upper roll to one end. Therefore, the L-shaped section material can be reliably bent with a simple configuration. Further, since the first housing is provided with the displacement adjusting device that displaces the first bearing housing in the vertical direction, the roll gap between the upper and lower rolls can be appropriately adjusted,
The radius of curvature of the L-shaped section material after rolling can be freely adjusted.

Further, the first guide means of the present invention exists in a virtual plane including the axes of the upper and lower rolls, and has a first guide roll having an axis orthogonal to the axes of the upper and lower rolls; A bracket for supporting a guide roll, wherein the first guide roll includes a roll shaft attached to the bracket, a roll body provided at an interval radially outward of the roll shaft, and a roll body and the roll shaft. And a ball bearing interposed therebetween and rotatably supporting the roll body about the roll axis.

According to the present invention, the first guide means includes a first guide roll, and the first guide roll is present in an imaginary plane including the axes of the upper and lower rolls and has a vertical axis. The other side of the cross-section member can be rotatably supported and smoothly guided to the downstream side.

Further, the second guide means of the present invention includes a fixed shaft extending in the vertical direction, a second guide roll rotatably provided below the fixed shaft, and a space above the second guide roll of the fixed shaft. A third guide roll rotatably provided with a gap, a support member for supporting an upper portion of the third guide roll of the fixed shaft and an intermediate portion between the second guide roll and the third guide roll, and a fixed shaft for the support member. A moving member that moves the supporting member so that the second and third guide rolls move closer to and away from the L-shaped cross-section member, wherein the moving device includes a movable nut provided at a lower portion of the supporting member. And a screw rod meshing with the movable nut, a bracket for rotatably supporting both ends of the screw rod, and a handle wheel for rotating the screw rod.

According to the present invention, since the second guide means includes the second and third guide rolls provided at intervals in the vertical direction, the other side extending substantially vertically above the L-shaped section material. Even if the height is high, the other side of the curved L-shaped section member can be rotatably supported and smoothly guided to the downstream side.

The present invention is characterized in that an L-shaped roll forming machine in which a plurality of pairs of upper and lower forming rolls are arranged in series is provided on the entrance side of the side guide means.

According to the present invention, since the L-shaped roll forming machine is provided on the entry side of the side guide means, the coil protector can be continuously formed directly from the raw material in the same facility. Thereby, the production efficiency of the coil protector is greatly improved.

[0022]

FIG. 1 is a simplified perspective view showing the configuration of a coil protector 23 according to an embodiment of the present invention, and FIG. 2 is a perspective view showing the appearance of a coil after standard packaging. It is. The standard packing of a coil product such as a cold-rolled steel strip (hereinafter, referred to as a coil 24) is generally performed in the following procedure.

(1) The inner and outer peripheral surfaces and the end surface of the coil 24 are packed in paper using a wrapping paper 29. At this time, the wrapping paper 29
Are folded at the end face and the inner peripheral face, so that the fold 31 is formed as described above. (2) A coil protector called an outer ring 30 is attached to the outer corner of the coil 24 from above the wrapping paper 29. (3) A coil protector called an inner ring 23 is attached to the inner corner of the coil 24 from above the wrapping paper 29. (4) The binding hoop 32 is wound around the outer peripheral surface of the coil 24 and tightened from above the wrapping paper 29 to bind the coil 24 in the circumferential direction. (5) The binding hoop 32 is wound around the outer peripheral surface of the coil 24 and the coil center hole and tightened from above the wrapping paper 29, the outer ring 30 and the inner ring 23, and the coil 24 is bound in the axial direction.

The overall shape of the inner diameter ring 23 is substantially ring-shaped, and is divided at one location in the circumferential direction.
Therefore, it can be easily mounted on the inner diameter corner of the coil 24. The inner diameter ring 23 includes a cylindrical tubular portion 26 extending along the axis 25 and an outward flange portion 27 extending radially outward. The cylindrical portion 26 of the inner ring 23 and the outward flange portion 27 are connected in an L-shape. The length L1 of the cylindrical portion 26 of the inner ring 23 is set to a predetermined length related to the coil hanger 33 as described later.
The length L1 of the cylindrical portion 26 of the present embodiment is, for example, 120
mm, which is set to be longer than the above-described conventional cylindrical portion having a length of 60 mm.

The thickness of the outwardly facing flange portion 27 is not constant, but is set so as to become thinner radially outward. That is, the outermost plate thickness T1 in the radial direction is smaller than the innermost plate thickness T1 in the radial direction. As described later, since this reduction in thickness is brought about by rolling,
The work hardening by rolling increases radially outward of the outward flange portion 27, and the hardness of the outward flange portion 27 increases radially outward. Since the thickness of the outward flange portion 11 hardly decreases in the conventional inner ring 6, the work hardening thereof is small, and the hardness of the outward flange portion 27 of the present embodiment is smaller than that of the conventional outward flange portion 11. The hardness becomes higher at any position in the radial direction than the hardness. Therefore, the inner diameter ring 23 of the present embodiment has better inner corner protection properties than the conventional inner diameter ring 6.

The thickness of the cylindrical portion 26 of the inner ring 23 is selected in the range of 0.5 to 3.2 mm according to the size and weight of the coil 24. The radial length L2 of the outward flange portion 27 is selected to a value of 50 mm or more. It is preferable to use a metal plate, particularly a low-carbon cold-rolled steel plate, as a material of the inner ring 23. The low-carbon cold-rolled steel sheet has excellent properties as a material of the inner diameter ring 23, such as being soft and having good workability and being easily work-hardened by working.

FIG. 3 is a front sectional view showing a state in which the coil 24 to which the inner diameter ring 23 shown in FIG. 1 is mounted is lifted, and FIG. 4 is a diagram showing a configuration of a coil hanging member 33 for lifting the coil 24 shown in FIG. FIG. 3 is a simplified front view. The inner diameter ring 23 is attached by attaching the cylindrical portion 26 and the outward flange portion 27 to the inner diameter corners of the coil 24 packed with the wrapping paper 29 on the inner peripheral surface and the end surface of the coil 24 via the wrapping paper 29, respectively. Is done. Coil 24 with standard packaging
Is lifted using the coil hanger 33. The coil hanger 33 is connected to the wire rope 3 from an overhead traveling crane, for example.
7, which is attached via a suspension ring 36 to a hook 34 suspended by the hook 7, and engages with the coil 24 placed with the axis 35 horizontal. The coil hanging tool 33 is provided with a screw 38. The screw 38 is rotationally driven by a motor (not shown), and drives the nut 39 to be displaced vertically. The displacement of the nut 39 causes the pair of left and right lifting arms 41 and 42 to move in synchronization with each other via the link 40 so as to approach or separate from each other.

FIG. 5 shows the lifting arms 41 and 42 shown in FIG.
FIG. 6 is a cross-sectional view taken along the line VI-VI of FIG. 5, and FIG. 7 is a cross-sectional view taken along the line VII-VII of FIG. is there. Each of the lifting arms 41 and 42 has a substantially L-shaped overall shape, extends in the up-down direction, extends vertically in contact with the coil end face, and extends horizontally in succession to the vertical arm 43 to extend the coil center. And a lateral arm 44 inserted into the hole. The horizontal arm 44 has a substantially mountain-shaped cross-sectional shape, and its upper surface is curved convexly upward. As a result, when the coil 24 is lifted, the upper surface of the horizontal arm 44 abuts on the inner peripheral surface of the coil 24 with the curved surfaces, so that it is possible to prevent the coil 24 from being flawed. A circular storage recess 45 extending in the vertical direction is formed on the upper surface of the horizontal arm 44, and a lifting detection switch 46 and a coil spring 47 are provided on the bottom surface of the storage recess 45. The lifting detection switch 46 is provided in the center hole of the coil spring 47.

A pressing projection 48 is fitted over the coil spring 47 in the storage recess 45, and the upper portion of the pressing projection 48 protrudes upward from the upper surface of the horizontal arm 44. The pressing projection 48 has a substantially cylindrical shape, and is provided so as to be vertically slidable along the peripheral wall surface of the storage recess 45. Therefore, when the coil 24 is lifted, when the upper surface of the lateral arm 44 comes into contact with the inner peripheral surface of the coil and a pressing force is applied to the pressing protrusion 48, the pressing protrusion 48 overcomes the spring force of the coil spring 47 and is displaced downward. Then, the lifting detection switch 46 is turned on. When the pressing force is released, the pressing protrusion 48 is displaced upward by the spring force of the coil spring 47, and the lifting detection switch 46 is turned off. The upper corner of the pressing projection 48 is formed in a curved shape. The protrusion height of the pressing protrusion 48 and the pressing protrusion 4
The ratio to the storage length in the storage recess 45 of FIG. 8 is very small, for example, set to 1/10. Therefore, the pressing projection 48 can be slid and displaced with its axis aligned with the axis of the storage recess 45, that is, without being inclined, and the lifting detection switch 46 can be reliably turned on / off. it can.

The vertical arm 43 is a prism extending in the vertical direction, and has a substantially square cross section. Vertical arm 4
A vertical groove 50 extending in the up-down direction is formed on the surface 43a facing the third coil end surface 24a. The cross-sectional shape of the vertical groove 50 is rectangular. An end surface detection switch 53 and a pair of upper and lower coil springs 54 are provided on a bottom surface 51 of the vertical groove 50 facing the coil end surface 24a. The end face detection switch 53 and the coil spring 54 are mounted perpendicular to the bottom surface 51, and the end face detection switch 53 is a pair of upper and lower coil springs 5.
4 is provided in the middle. A pressing piece 55 is provided on the coil end face side of the coil spring 54 (the left side in FIG. 7).
5 is fitted in the vertical groove 50 so as to be slidable in a direction perpendicular to the bottom surface 51, that is, in a substantially horizontal direction. Pressing piece 5
Numeral 5 is a plate-like body extending in the vertical direction. The tip of the pressing piece 55 on the coil end face 24 a side projects from the surface of the vertical arm 43 toward the coil end face.

When the vertical arm 43 comes into contact with the coil end surface 24a during lifting of the coil 24, an arrow 56
Direction pressing force is applied. Thereby, the pressing piece 55
Overcomes the spring force of the pair of upper and lower coil springs 54 and is displaced in the direction of the arrow 56 to turn on the end face detection switch 53. When the pressing force is released, the pressing piece 55 is displaced in the direction opposite to the arrow 56 by the spring force of the pair of upper and lower coil springs 54, and turns off the end face detection switch 53. Since the pressing piece 55 extends in the vertical direction, the contact between the vertical arm 43 and the coil end face 24a can be reliably detected even if the coil end face 24a is not flat.

Referring again to FIG. 3 and FIG.
Lifting of No. 4 is performed as follows. Coil hanger 33
Of the lifting arm 41, 4
The interval of 2 is larger than the plate width of the coil 24, the coil hanger 33 is moved downward by the overhead traveling crane, and when the horizontal arm 44 reaches the position of the coil center hole, the lowering is stopped, and the screw 38 is turned off. Reverse and lift arm 4
1 and 42, the pressing piece 55 and the coil end face 24a
When the end face detection switch 53 is actuated and the end face detection switch 53 is operated, the rotation of the screw 38 is stopped, the coil hanging tool 33 is moved upward by the overhead traveling crane, and the pressing projection 48 and the coil inner peripheral surface come into contact with each other, and the lifting detection switch is turned on. When 46 operates, an alarm is issued to notify that the coil 24 has been lifted.
Thus, the lateral arm 44 is controlled by the end face detection switch 53.
After the insertion into the coil center hole is detected, the coil hanger 3
Since the lifting of the coil 3 is started, the lifting of the coil 24 in a state where the insertion of the horizontal arm 44 is insufficient is not performed. Therefore, there is no danger of the coil 24 dropping, and safety is greatly improved. Further, since the lifting detection switch 46 notifies that the coil 24 has been lifted, the safety of lifting and transporting the coil is greatly improved.

In this embodiment, the length L1 of the cylindrical portion 26 of the inner diameter ring 23 is determined by the distance LS between the pressing projection 48 provided on the horizontal arm 44 of the lifting arm 41 and the vertical arm 43 as shown in FIG. Is set to be larger than As a result, when the coil is lifted, the pressing protrusion 46 surely comes into contact with the cylindrical portion 26. Therefore, the pressing protrusion 48 and the wrapping paper 2 folded into the coil center hole as described in the related art are used.
9 is avoided, and even if the pressing protrusion 48 moves during lifting of the coil, there is no possibility that the wrapping paper 29 is damaged. Therefore, the coil 24 is not exposed to the outside air, and the rust prevention of the wrapping paper 29 is improved.

FIG. 8 is a simplified plan view showing the structure of a molding facility 61 capable of suitably molding the inner ring 23 shown in FIG. 1. FIG. 9 is a sectional view taken along the line IX-I of FIG.
FIG. 10 is a cross-sectional view as viewed from X. FIG.
FIG. 11 is a cross-sectional view as viewed from X. FIG.
It is sectional drawing seen from -XI. The forming equipment 61 includes an L-shaped roll forming machine 63, side guide means 64, and a forming machine 6.
5, a first guide means 66 and a second guide means 67. The roll forming machine 63 is provided at the uppermost stream of the forming equipment 61, and sequentially performs a bending process in a plate width direction on a cut plate steel plate 69 as a raw material to form an L-shaped section member 70. L-shaped section material 70
Consists of one side 71 extending substantially horizontally, and the other side 72 connected to one side in an L-shape and extending substantially vertically upward. In the L-shaped roll forming machine 63, a plurality of pairs of upper and lower forming rolls, for example, 10 sets are arranged in series, and the gap shape between the pair of upper and lower forming rolls becomes smaller toward the downstream side.
It is formed so as to approach the shape.

The side guide means 64 is disposed on the exit side of the L-shaped roll forming machine 63 and on both sides in the width direction of the L-shaped section member 70, and includes first and second side guides 64a, 64b.
64b. The first side guide 64a is
It includes a guide block 73 and a roller 74 rotatably pin-connected to the first guide block 73, and is provided at a fixed position on the side (the left side in FIG. 8) of the other side 72 of the L-shaped section member 70. The second side guide 64b includes a second guide block 75 and a fixing bolt 76, and has an L-shaped section member 70.
Is provided on the side of one side 71 (right side in FIG. 8). The second guide block 75 is movable in the width direction, and its installation position is adjusted according to the width of one side 71 of the L-shaped section member 70. First and second side guides 64a, 6
4b guides the other side 72 and one side 71 of the L-shaped section member 70 to the downstream side, respectively.

The forming machine 65 is provided on the exit side of the side guide means 64, and forms the L-shaped section member 70 into a ring shape.
The molding machine 65 is provided with a pair of upper and lower rolls 78 and 79 having a horizontal axis. Upper roll 78
Includes an upper roll main body 80 and an upper roll shaft 81. The upper roll shaft 81 is connected to one end face 80a of the upper roll body 80.
And is not provided on the other end face 80 b of the upper roll main body 80. A first bearing box 83 provided with a ball bearing 84 is provided on the upper roll shaft 81, and the first bearing box 83 rotatably supports the upper roll 78. The lower roll 79 includes a lower roll body 85 and a lower roll shaft 86, and the lower roll shaft 86 is provided on both end surfaces of the lower roll body 85. On the lower roll shaft 86, second and third bearing boxes 87 and 88 having ball bearings 84 are provided with the lower roll body 8.
The second and third bearing boxes 87 and 88 rotatably support the lower roll 79, which are provided on one end side (the right side in FIG. 9) and the other end side, respectively.

A first housing 89 is provided on one side of the upper and lower rolls 78, 79, and the first housing 89 slides vertically on the first and second bearing housings 83, 87. Hold it displaceable. A coil spring 90 serving as a spring means is provided between the first bearing box 83 and the second bearing box 87, and the coil spring 90 separates the first and second bearing boxes 83 and 87 vertically. Energize the resilience. A second housing 91 is provided upright on the side of the other end of the lower roll 79, and the second housing 91 holds the third bearing box 88 in a vertically slidable manner. A displacement adjusting device 93 is provided on an upper portion of the first housing 89, and the displacement adjusting device 93 includes a screw rod 94 and a handle 95. The screw rod 94 is engaged with a female screw formed on the upper part of the first housing 89, and is displaced in the vertical direction by the rotation of the handle 95. When the screw rod 94 is displaced downward, the first bearing housing 83 is displaced downward by overcoming the elastic force of the coil spring 90, and the upper roll 78 and the lower roll 7 are displaced downward.
And 9 are brought close to each other. When the screw rod 94 is displaced upward, the first
The bearing box 83 is displaced upward by the elastic force of the coil spring 90, and separates the upper roll 78 and the lower roll 79.

The upper and lower rolls 7 of the first housing 89
A drive device 97 is provided on the side opposite to the sides 8, 79. The driving device 97 includes a driving motor 98, an upper driving gear 99 and a lower driving gear 100. The upper and lower drive gears 99 and 100 are provided with upper and lower roll shafts 81 and 86, respectively.
Are provided at one end, and are in mesh with each other.
The lower roll shaft 86 is connected to the motor shaft 102 via the joint 101.
Is linked to Thus, when the drive motor 98 is driven to rotate, the lower roll 79 is driven to rotate, and the upper roll 78 is driven to rotate synchronously via the upper and lower drive gears 99 and 100.

As shown in FIG. 9, the L-shaped section member 70 has one side 71 extending substantially horizontally interposed between the upper and lower rolls, and the other side 72 extending substantially vertically upward is formed on the other end face 80b of the upper roll body 80. Rolled in contact with As described above, since the other end of the upper roll 78 is not supported, the gap between the upper and lower rolls is set to a predetermined value by the displacement adjusting device 93, and the one side 71 is engaged between the upper and lower rolls. Then, the upper roll 78 bends. Since the magnitude of the deflection increases from one end of the upper roll 78 to the other end, the roll gap distribution between the upper and lower rolls is reduced from the other end of the upper roll 78 to the one end. Adjusted automatically. Further, since one side 71 of the L-shaped cross section 70 is rolled in this state, the pressure extension of the one side 71 varies depending on the width direction position, and becomes longer from the other end toward the one end. Become. Accordingly, the L-shaped section member 70 after the rolling is curved in the direction of the arrow 102 in a horizontal plane and formed into a ring shape as shown in FIG.
The radius of curvature of this curvature is proportional to the gap between the upper and lower rolls at one end of the upper roll 78, and becomes smaller as the gap between the upper and lower rolls becomes smaller. Therefore, the gap between the upper and lower rolls is set in advance according to the target radius of curvature of the inner ring 23.

As described above, in the present embodiment, the gap distribution between the upper and lower rolls can be reliably inclined in the roll width direction with a simple configuration, so that the L-shaped cross section can be easily curved. Further, since the molding machine 65 is provided with the displacement adjusting device 93 for displacing the upper roll 78 in the vertical direction, the roll gap between the upper and lower rolls can be appropriately adjusted, and the L-shaped cross-section member 70 after the rolling can be adjusted. , That is, the radius of curvature of the inner diameter ring 23 can be freely adjusted. Therefore, the inner diameter ring 23 can be efficiently formed, and the production efficiency of the inner diameter ring 23 can be greatly improved.

The first guide means 66 is provided on the side of the other end of the upper roll 78, facing the other end face 80b of the upper roll body 80. The first guide means 66 includes a first guide roll 103. First guide roll 103
Are supported by the bracket 104, and the upper and lower rolls 7
It has a vertical axis that lies in an imaginary plane that includes the 8,79 axes and is orthogonal to the axes of the upper and lower rolls 78,79. The first guide roll 103 is interposed between the roll shaft 105 attached to the bracket 104, a roll body 106 provided at an interval radially outward of the roll shaft 105, and the roll body 106 and the roll shaft 105. And a ball bearing 107 that rotatably supports the roll body 106 around the roll shaft 105.

The roll body 106 of the first guide roll 103
And the other end face 80b of the upper roll main body 80 is set to be larger than the thickness of the other side 72 of the L-shaped section member 70. As described above, during the rolling, the roll gap distribution between the upper and lower rolls is adjusted so as to decrease from the other end to the one end of the upper roll 78. A thrust force acts in the direction of the arrow 108 from the part toward the other end. The first guide roll 103 has a resistance L against this thrust force.
The other side 72 of the section 70 is rotatably supported, and the other side 72 extending substantially vertically upward of the L-section 70 is guided downstream through the gap. Also, the first guide roll 103
Exists in an imaginary plane including the axes of the upper and lower rolls 78 and 79, so that the other side 72 of the L-shaped section 70 can be smoothly guided to the downstream side without meandering. The L-shaped section member 70 that has passed through the molding machine 65 and the first guide means 66 slides downstream while one side 71 is placed on a horizontal table 120 made of steel.

The second guide means 67 is provided on the exit side of the molding machine 65, and guides the other side 72 of the L-shaped section member 70 downstream in a curved state. As shown in FIG. 10, the second guide means 67 includes second and third guide rolls 109 and 1.
10 are provided. The second guide roll 109 is rotatably provided below a fixed shaft 111 extending in the vertical direction via a ball bearing 112, and the third guide roll 110 is spaced above the second guide roll 109 of the fixed shaft 111. It is rotatably provided via a ball bearing 112. The lower end surface of the second guide roll 109 is installed at an interval larger than the plate thickness of the horizontal table 120 and one side 71 of the L-shaped section member 70. The fixed shaft 111 is connected to the third guide roll 11
The support member 113 supports an upper portion of the first roller 110 and an intermediate portion between the second guide roll 109 and the third guide roll 110. A screw is formed in a portion of the fixed shaft 111 that protrudes above the support member 113, and a screw is formed on the fixed shaft 111.
1 is a fixing nut 114 which is a fixing member that engages with the screw.
Is fixed to the support member 113.

The support member 113 is attached to a moving device 115. The moving device 115 is provided with a screw rod 116 and a movable nut 117 as shown in FIG.
The movable nut 117 is attached to a lower part of the support member 113 and is engaged with the screw rod 116. Screw rod 11
Reference numeral 6 has a horizontal axis, and both ends of the horizontal table 1
It is rotatably supported by a bracket 118 provided on the top 20. A handle wheel 119 is provided at one end of the screw bar 116, and the screw bar 116 is driven to rotate by the handle wheel 119.

When the steering wheel 119 is rotated, the screw rod 1
The support member 113 moves along the axis of the threaded rod 116 via the movable nut 16 and the movable nut 117, and the second and third guide rolls 109, 1 attached to the support member 113.
10 approaches and separates from the other side 72 of the L-shaped section member 70.
Thus, even if the radius of curvature of the other side 72 changes, the second and third guide rolls 109 and 110 can be easily brought into contact with the other side 72 and guided downstream. Also, the second and third guide rolls 109 and 110
Are provided at intervals in the vertical direction, so that even if the height of the other side 72 extending substantially vertically above the L-shaped section member 70 is high, the curved side 72 is rotatably supported. It can be guided to the downstream side smoothly. One side 71 of the L-shaped section member 70 is guided downstream through a gap between the lower end surface of the second guide roll 109 and the horizontal table 120.

The inner ring 23 is formed in the forming equipment 61 as follows. In the first step, the cut sheet steel plate 69, which is a material, is cut so as to have a target size. In the second step, the cut sheet steel plate 69 is passed through the L-shaped roll forming machine 63 and is subjected to bending in the width direction of the plate sequentially to be formed into the L-shaped section material 70. The dimensions of one side 71 and the other side 72 of the L-shaped section member 70 are formed so as to match predetermined dimensions. In the third step, L
The first and second side guides 64a, 6
It is guided to the molding machine 65 while being guided by 4b. At this time, the other side 72 extending substantially vertically upward of the L-shaped section member 70 is guided so as to pass through the gap between the other end of the upper roll 78 of the forming machine 65 and the first guide roll 103. In the fourth step, one side 71 of the L-shaped section member 70 is engaged between the upper and lower rolls of the molding machine 65 and rolled. During rolling, the gap distribution between the upper and lower rolls becomes smaller from the other end to the one end of the upper roll 78 as described above, so that the L-shaped section 70 after rolling is curved in a horizontal plane. In the fifth step, the curved L-shaped section member 70 is guided downstream by the second and third guide rolls 109 and 110. As a result, the L-shaped section member 70 is formed into a ring shape, and the inner diameter ring 23 is formed. That is, the one side 71 subjected to the rolling process forms the outward flange portion 27 extending radially outward, and the other side 72 not subjected to the rolling process forms the cylindrical portion 26 extending in the axial direction. An inner diameter ring 23 is formed.

As described above, since one side 71 of the L-shaped section 70 is rolled in a state where the gap distribution between the upper and lower rolls is inclined in the roll width direction, the L-shaped section 70 is easily rolled in a horizontal plane after rolling. And the inner diameter ring 23 can be formed efficiently. The forming machine 65 and the L-shaped roll forming machine 63
Are provided in the same facility, so that the inner diameter ring 23 can be continuously formed directly from the cut steel plate 69 of the material by the same facility. Therefore, the production efficiency of the inner ring 23 is greatly improved.

In the present embodiment, the upper roll 78 of the molding machine 65 is configured so that only one end is supported. However, the present invention is not limited to such a configuration, and the roll diameter is increased. You may comprise so that both ends of a roll may be supported. Further, although the first guide means 66 is provided with the first guide roll 103, a guide plate may be provided in place of the first guide roll 103. Although the second guide means 67 is provided with the second and third guide rolls 109 and 110, a guide bending plate may be provided in place of them. Although the forming machine 65 and the L-shaped roll forming machine 63 are provided in the same facility, the configuration may be such that the roll forming machine 63 is separated as a separate facility. Further, the outward flange portion 27 is formed by rolling, and the thickness of the outward flange portion 27 is configured to become thinner toward the outside in the radial direction. May be formed.

(Example) An inner diameter ring 23 was manufactured by using the cutting equipment 61 using a low-carbon cold-rolled steel plate as a raw material. The dimensions are as follows.

Low-carbon cold-rolled steel plate sheet thickness: 1.2 mm, width: 177 mm, length: 1550
mm Board width of one side 71 of the L-shaped section 70: 50 mm Board width of the other side 72 of the L-shaped section 70: 120 mm Inner diameter ring 23 (FIG. 1) Outer diameter D of the tube portion 26: 495 mm Tube portion 26 The axial length L1: 120 mm The thickness of the cylindrical portion 26: 1.2 mm The radial length L2 of the outward flange 27: 70 mm The outer diameter D2 of the outward flange 27: 635 mm The innermost of the outward flange 27 Thickness T1: 1.2m
m Thickness T2 of the outermost part of the outward flange part 27: 1.0 m
m

The production efficiency of the inner ring 23 was good. The inner ring 23 was attached to the inner corner of the paper-packed coil 24 and lifted by the coil hanger 33 shown in FIG. 4, and the wrapping paper 29 was not damaged at all.

[0052]

As described above, according to the first aspect of the present invention, the length of the cylindrical portion of the coil protector is formed to be longer than the distance between the vertical arm of the lifting arm and the pressing projection. Therefore, when the coil is lifted, the pressing protrusion surely comes into contact with the cylindrical portion. As a result, direct contact between the pressing protrusion and the wrapping paper folded into the coil center hole is avoided, so that even if the pressing protrusion moves during lifting of the coil, the wrapping paper is prevented from being damaged, and the rust-preventive force of the wrapping paper is reduced. improves.

According to the second aspect of the present invention, a lifting detection switch is provided on the lifting arm of the coil lifting device, and an alarm is issued when the lifting detection switch is turned on. The performance is greatly improved.

According to the third aspect of the present invention, one side of the L-shaped cross-section member has a smaller roll gap distribution between the upper and lower rolls from the other end to the one end of the upper roll. Since the roll is adjusted and adjusted, the pressure extension at the position where the roll gap is small is longer than the pressure extension at the position where the roll gap is large, and the L-shaped section material after rolling is curved. Thus, one side of the rolled L-shaped section member forms an outward flange portion extending outward in the radial direction, and the other side not subjected to the rolling process forms a cylindrical portion extending in the axial direction. In addition, the first guide means is provided on the side of the other end of the upper roll that is not supported at an interval larger than the plate thickness of the other side of the L-shaped cross-section member. The other side extending substantially vertically upward can be guided downstream via the gap. Further, it is possible to prevent the upper roll from moving to the outside of the other end of the L-shaped section material during rolling.

According to the present invention, one end of the upper roll is rotatably supported by the first bearing box via the roll shaft, and the other end of the upper roll is provided with the roll shaft and the bearing box. Since it is not provided, the amount of deflection of the upper roll during rolling increases from one end to the other end.
With this, when rolling one side of the L-shaped section material between the upper roll whose other end is not supported and the lower roll whose both ends are rotatably supported, the distance between the upper and lower rolls is reduced. Is automatically adjusted so as to decrease from the other end of the upper roll toward the one end. Therefore, the L-shaped section material can be reliably bent with a simple configuration. Further, since the first housing is provided with a displacement adjusting device for displacing the first bearing housing in the vertical direction, the roll gap between the upper and lower rolls can be properly adjusted, and the L-shaped section material after rolling can be adjusted. The radius of curvature can be adjusted freely.

According to the fifth aspect of the present invention, the first guide means includes the first guide roll, and the first guide roll exists in an imaginary plane including the axes of the upper and lower rolls and has a vertical axis. Therefore, the other side of the L-shaped section member can be rotatably supported and smoothly guided to the downstream side.

According to the sixth aspect of the present invention, since the second guide means includes the second and third guide rolls provided at an interval in the vertical direction, the second guide means is substantially vertically above the L-shaped section material. The other side of the curved L-shaped cross-section member can be rotatably supported and smoothly guided to the downstream side even if the height of the other side extending to is higher.

According to the present invention, since the L-shaped roll forming machine is provided on the entry side of the side guide means, the coil protector can be continuously formed directly from the raw material in the same facility. it can. Thereby, the production efficiency of the coil protector is greatly improved.

[Brief description of the drawings]

FIG. 1 shows a coil protector 23 according to an embodiment of the present invention.
FIG. 2 is a perspective view showing a simplified configuration of FIG.

FIG. 2 is a perspective view showing the appearance of a coil after standard packaging.

FIG. 3 shows a coil 2 equipped with an inner diameter ring 23 shown in FIG.
FIG. 4 is a front cross-sectional view showing a state at the time of lifting 4;

FIG. 4 is a coil lifting device 3 for lifting the coil 24 shown in FIG.
3 is a simplified front view showing the configuration of FIG.

5 is a simplified perspective view showing a configuration of lifting arms 41 and 42 shown in FIG.

FIG. 6 is a sectional view taken along section line VI-VI in FIG. 5;

FIG. 7 is a sectional view taken along section line VII-VII in FIG. 5;

8 is a simplified plan view showing a configuration of a molding facility 61 capable of suitably molding the inner ring 23 shown in FIG.

FIG. 9 is a cross-sectional view as viewed from the section line IX-IX of FIG. 8;

FIG. 10 is a cross-sectional view taken along the line XX of FIG. 8;

FIG. 11 is a cross-sectional view taken along the line XI-XI of FIG. 8;

FIG. 12 is a cross-sectional view showing the condition of the wrapping paper on the inner peripheral surface of the coil.

FIG. 13 is a perspective view showing a simplified configuration of a conventional inner diameter ring 6.

FIG. 14 is a front cross-sectional view showing a state when the coil 1 on which the conventional inner diameter ring 6 is mounted is lifted.

FIG. 15 is a side sectional view as viewed from XV-XV in FIG. 14;

[Explanation of symbols]

 3,29 Wrapping paper 5,30 Outer ring 6,23 Inner ring 10,26 Tubular part 11,27 Outward flange part 13,41,42 Lifting arm 14,43 Vertical arm 15,44 Horizontal arm 46 Lifting detection switch 48 Press Projection 53 End face detection switch 55 Pressing piece 61 Forming equipment 63 L-shaped roll forming machine 64 Side guide means 65 Forming machine 66 First guide means 67 Second guide means 78 Upper roll 79 Lower roll 89 First housing 91 Second housing 93 Displacement Adjusting device 97 Drive device 103 First guide roll 109 Second guide roll 110 Third guide roll 113 Support member 115 Moving device

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-63-315490 (JP, A) JP-A-1-145907 (JP, A) JP-A-54-102281 (JP, A) JP-A-2- 75401 (JP, A) Japanese Utility Model 6-14173 (JP, U) Japanese Utility Model Application No. Sho 59-26488 (JP, U) Japanese Utility Model Utility Model 3-102576 (JP, U) Japanese Utility Model Utility Model 1-94391 (JP, U) Japanese Utility Model Showa 63-157084 (JP, U) Japanese Utility Model Showa 60-114174 (JP, U) Japanese Utility Model Utility Model 2-108990 (JP, U) Japanese Utility Model Utility Model 3-44182 (JP, U) Japanese Utility Model Utility Model No. 41-7792 (JP, Y1) (58) Fields investigated (Int. Cl. ⁶ , DB name) B66C 1/66 B66C 1/28 B66C 1/62 B21B 5/00 B21H 1/06 B66C 1 / 42,1 / 44 B66C 1/12

Claims (7)

(57) [Claims] 1. A ring shape which is mounted on a corner of an inner diameter of a coil which is placed with its axis being horizontal and which protects the inner diameter of the coil when the coil is hung by engaging a coil hanging tool with a center hole of the coil. An outer flange portion that abuts against an end surface of the coil and extends radially outwardly; and an L-shape continuous with the outward flange portion and abuts an inner peripheral surface of the coil to inward in the axial direction. A coil portion having an L-shaped lifting arm, the lifting arm extends in the vertical direction, and is connected to the vertical arm in contact with the coil end surface in an L-shape. A horizontal arm that extends horizontally and is inserted into the coil center hole. The horizontal arm is provided with a lifting detection switch, and a pressing protrusion for turning on / off the lifting detection switch is provided on the upper surface of the horizontal arm. Projecting upward from above and below The coil protector is provided so as to be displaceable in the direction, and is formed so that the length of the cylindrical portion is longer than the interval between the vertical arm and the pressing protrusion. 2. An L-shaped lifting arm that engages with the coil, the lifting arm extends in the up-down direction, and a vertical arm that contacts the coil end surface, and extends horizontally in an L-shape with the vertical arm. A horizontal arm inserted into the center hole of the coil, a lifting detection switch is provided on the horizontal arm, and a pressing projection for turning on / off the lifting detection switch protrudes upward from the upper surface of the horizontal arm on the upper surface of the horizontal arm. Prepare a coil hanger that can be displaced up and down in the vertical direction, pack the inner and outer peripheral surfaces and the end surface of the coil with wrapping paper, abut on the end surface of the coil via wrapping paper, and extend outward in the radial direction. An outward flange portion and an outwardly extending flange portion in an L-shape, including a cylindrical portion extending inward in the axial direction by abutting the inner peripheral surface of the coil via a wrapping paper, and Longer than the distance between the arm and the press projection Attach the ring-shaped coil protector formed so that it becomes the inner corner of the coil, insert the horizontal arm of the lifting arm into the center hole of the coil, and then raise the coil lifting device after the vertical arm contacts the coil end surface. A method of lifting a coil, wherein the lifting projection switch is turned on to raise an alarm and raise the alarm while bringing the pressing projection into contact with the cylindrical portion. 3. A side guide means for guiding an L-shaped cross-section member in which one side extending substantially horizontally and the other side extending substantially vertically upward in an L-shape to a downstream side, and an exit side of the side guide means. A lower roll having a horizontal axis, both ends of which are rotatably supported, and an upper roll having a horizontal axis, of which only one end is rotatably supported, and one of the L-shaped section members The sides are interposed between the upper and lower rolls, and the roll gap distribution between the upper and lower rolls is adjusted and rolled so as to become smaller from the other end to the one end of the upper roll, and the L-shaped section material is placed in a horizontal plane. A forming machine that forms a ring by bending it; and an L-shaped section provided on the side of the other end of the upper roll with an interval larger than the thickness of the other side of the L-shaped section material. A first side for guiding the other side of the material to the downstream side through the gap.
A coil protector forming equipment, comprising: a guide means; and a second guide means provided on the exit side of the forming machine and guiding the other side of the L-shaped cross section to the downstream side in a curved state. 4. The molding machine comprises: a first bearing box rotatably supporting one end of an upper roll via a roll shaft; and a rotatable one end and the other end of a lower roll via a roll shaft. Second and third bearing boxes respectively supporting the first and second bearing boxes, and first housings erected on one side of the upper and lower rolls to hold the first and second bearing boxes slidably in the vertical direction; A second housing erected on the side of the other end of the roll and holding the third bearing housing slidably in the vertical direction; and a displacement provided on the first housing and displacing the first bearing housing in the vertical direction. An adjusting device; spring means provided between the first bearing housing and the second bearing housing for biasing the first and second bearing housings vertically away from each other; Provided on the side opposite to the upper and lower rolls, synchronously rotating the upper and lower rolls. Molding equipment of the coil protection according to claim 3, characterized in that it comprises a drive unit for driving. 5. The first guide means is present in an imaginary plane including the axes of the upper and lower rolls, and has a first axis having an axis perpendicular to the axis of the upper and lower rolls.
A guide roll, and a bracket for supporting the first guide roll, wherein the first guide roll has a roll shaft attached to the bracket, a roll body provided at an interval radially outward of the roll shaft, and a roll. The molding equipment for a coil protector according to claim 3 or 4, further comprising a ball bearing interposed between the main body and the roll shaft, the ball bearing rotatably supporting the roll main body around the roll shaft. 6. A fixed shaft extending in the vertical direction, a second guide roll rotatably provided below the fixed shaft, and a space above the second guide roll of the fixed shaft. A third guide roll, which is rotatably provided, a support member that supports an upper portion of the third guide roll of the fixed shaft and an intermediate portion between the second guide roll and the third guide roll, and fixes the fixed shaft to the support member. A fixing member, and a moving device that moves the supporting member such that the second and third guide rolls move closer to and away from the L-shaped cross-section member, wherein the moving device includes a movable nut provided at a lower portion of the supporting member; The coil protection according to any one of claims 3 to 5, further comprising: a screw rod engaged with the movable nut; a bracket rotatably supporting both ends of the screw rod; and a handle wheel rotating the screw rod. Molding equipment 7. The coil protection according to claim 3, wherein an L-shaped roll forming machine in which a plurality of pairs of upper and lower forming rolls are arranged in series is provided on the entrance side of the side guide means. Equipment molding equipment.