JP2003212440A - Coil protector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve safety by preventing injury of a worker by preventing breakage of a glove or clothes of the worker. <P>SOLUTION: An inner diameter ring 23 as a coil protector has a ring shape as a whole, is divided at one circumferential place, and has an outward flange part 27 and a cylinder 26. Corners of both circumferential ends of the inner diameter ring 23 are formed roundly. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coil protector used for packing coil products such as steel strips (hereinafter referred to as coils).

[0002]

2. Description of the Related Art Coil is packaged and shipped so that its product can be delivered to customers in perfect condition.

A typical prior art is US Pat. No. 2,983,534 issued to the present applicant. This prior art discloses a coil protector attached to the end of the central hole of the coil. The coil protector is in contact with the end surface of the coil and extends outward in the radial direction. The outwardly extending flange portion is connected to the outward flange portion in an L-shape, and comes into contact with the inner peripheral surface of the center hole of the coil. A cylindrical portion extending inward is included, and is divided in the circumferential direction. The coil protector is manufactured by plastically deforming a rectangular steel strip, and the corners at both ends in the circumferential direction are substantially right angles and are sharp. Therefore, at the time of this packing work and at the shipping destination, the gloves and clothes worn by the worker are damaged and sharp injuries occur at the sharp corners at both ends in the circumferential direction of the coil protector.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a coil protector with improved safety.

[0005]

According to the present invention, an outward flange portion that abuts an end surface of a coil having a long strip shape and extends radially outward, and the outward flange portion includes a virtual axis of the coil. The cross-sectional shape in the plane is continuous in an L shape, and includes a tubular portion that abuts the inner circumferential surface of the central hole of the coil and extends inward in the axial direction. The outward flange portion and the tubular portion are circumferential. The coil protector is characterized in that it is divided into two parts, and the divided both ends in the circumferential direction overlap each other, and the corner parts 62a, 62b; 63a, 63b of the both ends in the circumferential direction are rounded.

Further, according to the present invention, the inward flange portion that abuts the end surface of the coil of the long strip and extends in the radial direction, and the inward flange portion have a cross-sectional shape in an imaginary plane including the axis of the coil. A tubular portion that is continuous in an L shape and that abuts the outer peripheral surface of the coil and extends inward in the axial direction. The inward flange portion and the tubular portion are divided in the circumferential direction, and the divided circumferential direction. Both ends of the corner overlap, and the corners 92 of the both ends in the circumferential direction are
The coil protector is characterized in that a, 92b; 93a; 93b are rounded.

According to the present invention, the corners of both ends of the coil protector in the circumferential direction of the outwardly or inwardly facing flange portion and the tubular portion are rounded and formed substantially as described in the above-mentioned prior art. Since it is not a right-angled shape, at the time of packing work and at the shipping destination, there is no risk of the operator being damaged by the corner being caught by the worker's safety gloves and clothes, and the worker is not injured. Safety is improved.

According to the idea of the invention, only the outward or inward flange may be rounded at its corners. Further, the corner portion only of the tubular portion may be rounded.

Further, according to the present invention, in the above-described method for manufacturing a coil protector, (a) a long metal strip is moved by moving a movable blade 72 disposed on both sides of the metal strip in a thickness direction toward a fixed blade 73. , Cutting, one of the pair of blades 72
Is the first blade portions 78a, 78 perpendicular to the longitudinal direction of the metal strip.
b and the second blade portions 79a1, 79a2; 79b1, 79 which are connected to the first blade portion at both widthwise end portions of the metal strip and which are rounded and curved inward in the longitudinal direction as they go outward in the widthwise direction.
The combination blade portions 77a and 77b including b2 are formed so as to be plane-symmetrical with respect to the plane of symmetry 76 that extends in the thickness direction and is perpendicular to the longitudinal direction, and the other blade 73 is the one blade 72. Corresponding to the above, the metal strip is cut, and the widthwise both ends of the metal strip are the corner portions 62a, 62
b; 63a, 63b: 92a, 92b; 93a; 93b
And (b) the cut metal band is plastically deformed to manufacture the coil protector, which is a method for manufacturing the coil protector.

According to the present invention, the roundness of the corners can be simultaneously formed by cutting a long metal strip such as a steel strip with a pair of blades, which simplifies the production. .

With respect to the plane of symmetry of the one blade, the combination blade portions are formed in plane symmetry with a gap d1 in the longitudinal direction, and therefore the one blade and the other blade act on the metal strip. The shearing force can form the rounded corner with a precise shape.

[0012]

1 is a perspective view showing a simplified structure of a coil protector 23, which is an embodiment of the present invention, and FIG. 2 is a perspective view showing a package of a coil after standard packaging. Is. Standard packaging of coil products such as cold-rolled steel strip (hereinafter referred to as 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 with a wrapping paper 29. At this time, the wrapping paper 29
Is folded at the end surface and the inner peripheral surface, so that the fold line 31 is formed by overlapping as described above. (2) A coil protector called an outer diameter ring 30 is attached to the outer peripheral corner of the coil 24 from above the wrapping paper 29. (3) A coil protector called an inner diameter ring 23 is attached to the inner corner of the coil 24 from above the wrapping paper 29. (4) The binding hoop 32a is wrapped 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 32b is wrapped around the outer peripheral surface of the coil 24 and the coil center hole, and is fastened from above the wrapping paper 29, the outer diameter ring 30, and the inner diameter ring 23 to bind the coil 24 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, the coil 24 can be easily attached to the inner diameter corner. The inner diameter ring 23 includes a cylindrical tube portion 26 extending along the axis 25, and an outward flange portion 27 extending outward in the radial direction. The tubular portion 26 of the inner diameter ring 23 and the outward flange portion 27 are continuous in an L-shaped cross section in a virtual plane including the axis 25 of the coil. The length L1 of the tubular portion 26 of the inner diameter ring 23 is set to a predetermined length related to the coil suspension 33, as will be described later. The length L1 of the tubular portion 26 of the present embodiment is, for example, 40 to 150.
mm.

The plate thickness of the outward flange portion 27 is not constant and is set so as to become thinner radially outward. That is, the radially outermost plate thickness T1 is thinner than the radially innermost plate thickness T1. As described below, this reduction in plate thickness is brought about by rolling, so
The work hardening due to rolling increases as it goes outward in the radial direction of the outward flange portion 27, and the hardness of the outward flange portion 27 increases as it goes outward in the radial direction. In the conventional inner diameter ring, since the plate thickness of the outward flange portion hardly decreases, the work hardening thereof is small, and the hardness of the outward flange portion 27 of the present embodiment is lower than that of the conventional outward flange portion. It becomes higher at any position in the radial direction. Therefore, the inner diameter ring 23 of the present embodiment
Has superior inner corner protection properties to conventional inner diameter rings.

The plate thickness of the cylindrical portion 26 of the inner diameter ring 23 is selected in the range of 0.5 to 3.2 mm depending on the size and weight of the coil 24. Further, the radial length L2 of the outward flange portion 27 is selected to be a value of 25 mm or more. As the material of the inner diameter ring 23, it is preferable to use a metal plate material obtained by dividing a long metal strip such as steel in the longitudinal direction thereof, particularly a low carbon cold rolled steel sheet. The low-carbon cold-rolled steel sheet has excellent characteristics as a material for the inner diameter ring 23, such as being soft and having good workability and being easily work-hardened by working.

FIG. 3 is a perspective view showing a state where the inner diameter ring 23 is partially expanded in the circumferential direction, and FIG. 4 is an inner diameter ring 23.
End portion 6 of one of the end portions 62, 63 in the circumferential direction of
3 is a perspective view showing the vicinity of FIG. These circumferential ends 6
2, 63 are overlapped in the radial direction of the coil 24 when the coil 24 is packed. At one end 63 in the circumferential direction, a corner portion 63 a of the tubular portion 26 and a corner portion 63 of the outward flange portion 27.
b is rounded and formed. The corner portion 62a of the cylindrical portion 26 and the corner portion 62b of the outward flange portion 27 at the other end portion 62 in the circumferential direction are also rounded. The radial length L2 of the outward flange portion 27 (see FIG.
Reference) may be, for example, 40 mm.

FIG. 5 is a side view of a manufacturing apparatus 66 for manufacturing a metal plate material 65 which is a material for the inner diameter ring 23. FIG. 6 is a plan view of the manufacturing apparatus 66. FIG. 7 is a plan view of the metal plate material 65 formed by the manufacturing apparatus 66 shown in FIGS. 5 and 6. The length L3 of the metal plate material 65 in the lengthwise direction (the horizontal direction in FIGS. 5, 6, and 7) is
For example, the width L4 may be 800 to 6000 mm.
May be, for example, 80 to 550 mm.

In the manufacturing apparatus 66, a long metal strip 67 such as a steel strip is nipped by a pair of pinch rolls 68 and 69 arranged in the thickness direction and conveyed in the long length direction. While the steel strip 67 is stopped, the steel strip 67 is cut by the cutting device 71 provided at the fixed position. This cutting device 71
Among the pair of blades 72, 73 arranged on both sides in the thickness direction, one movable blade 72 is moved closer to the other fixed blade 73 by the drive source 74, whereby the cutting operation is performed.
This cutting is lifted so that the blade 72 moves away from the blade 73.

FIG. 8 is a bottom view of the one blade 72. The blade 72 is formed by combined blade portions 77a and 77b that are plane-symmetric with respect to the plane of symmetry 76 with a gap d1 (see FIG. 8) in the longitudinal direction (left-right direction of FIGS. 5 to 8). Interval d1
May be, for example, 7 to 10 mm. The combined blade portion 77a includes a first blade portion 78a perpendicular to the long direction of the steel strip 67 (left and right direction in FIG. 8) and both ends of the steel strip 67 in the width direction (vertical direction in FIG. 8). It includes second blade portions 79a1 and 79a2 that are continuous with the portion 78a. As for the other combined blade portion 77b, as described above, it is configured to be plane-symmetric, and the same numeral is shown with a subscript b.
Only a number is shown, omitting a and b. Second blade portion 79a
1, 79a2; 79b1 and 79b2 are formed in plane symmetry with respect to an imaginary plane perpendicular to the plane of the steel strip 67 including the longitudinal axis 81 of the steel strip 67, and the radius thereof is, for example, 20.
It may be ˜30 mm, for example 25 mm. The side of the steel strip 67 is guided by the guide roller 98.

The other blade 73 arranged below the steel strip 67
Has a concave fitting portion into which one of the convex blades 72 is partially fitted, and thus the one blade 72 is displaced downward by the drive source 74 in FIG.
Is cut by the shearing force in the shape of the lower end surface of one blade 72 shown in FIG. In this way, the metal plate material 65 shown in FIG. 7 is obtained. A blade 72 separates a distance d1 between the trailing end of the preceding metal plate 67c1 in the carrying direction and the leading end of the trailing metal plate 67c2 in the carrying direction. As a result, the steel strip 67 is cut accurately.

The metal plate material 65 shown in FIG. 7 thus cut is plastically deformed to form the inner diameter ring 23.

FIG. 9 is a perspective view of a part of the outer diameter ring 30. The outer diameter ring 30 is similar to the structure of the inner diameter ring 23 described above, but it should be noted that the inward flange portion 87 of the tubular portion 86 has an L-shaped cross-section in an imaginary plane including the axis 25 of the coil. It has a continuous structure. The inward flange portion 87 contacts the end surface of the coil 24 and extends radially inward. The tubular portion 86 contacts the outer peripheral surface of the coil 24 and extends inward in the axial direction 25 (leftward in FIG. 9). The inward flange portion 87 and the tubular portion 86 are divided in the circumferential direction, and the divided circumferential end portions 92, 93 partially overlap in the radial direction of the coil 24. At one end 93 in the circumferential direction, a corner portion 93a of the tubular portion 86 is formed with a rounded shape, and a corner portion 93b of the inward flange portion 87 is formed with a rounded shape. Similarly, the other end 9 in the circumferential direction is also used.
The two corners 92a and 92b are also rounded in the same manner. Other configurations and manufacturing methods are the same as those of the inner diameter ring 23.

FIG. 10 is a front cross-sectional view showing a state in which the coil 24 having the inner diameter ring 23 and the outer diameter ring 30 shown in FIG. 1 is lifted, and FIG. 11 is the coil 24 shown in FIG.
It is a front view which simplifies and shows the structure of the coil lifting tool 33 which lifts. The inner diameter ring 23 is mounted by abutting the tubular portion 26 and the outward flange portion 27 on the inner diameter corners of the coil 24 packed with the wrapping paper 29 via the wrapping paper 29 on the inner peripheral surface and the end surface of the coil 24, respectively. To be done. The coil 24 provided with the standard packaging is hoisted using the coil hoisting tool 33. The coil suspension 33 is attached to a hook 34 suspended from a overhead traveling crane by a wire rope 37 via a suspension ring 36, and engages with the coil 24 placed with the axis 35 horizontal. Coil suspension 3
3 is equipped 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 is
A pair of left and right lifting arms 41, 42 via a link 40.
Move in sync with each other to move toward or away from each other.

Referring to FIGS. 10 and 11, the coil 2
The lifting of No. 4 is performed as follows. Coil suspension 33
The screw 38 of is rotated to drive the lifting arms 41, 4
The interval of 2 is made wider than the plate width of the coil 24, the coil suspension 33 is moved downward by the overhead traveling crane, and when the lateral arm 44 reaches the position of the coil center hole, the descending is stopped and the screw 38 is removed. Reversed and lifted arm 4
The interval between 1, 42 is narrowed, and the pressing piece 55 and the coil end surface 24a
And the end face detection switch 53 is activated, the screw 38 stops rotating, the overhead traveling crane moves the coil suspension 33 upward, and the pressing protrusion 48 comes into contact with the coil inner peripheral surface to lift the suspension detection switch. When 46 is activated, an alarm is issued to inform that the coil 24 has been lifted.
In this way, the end face detection switch 53 causes the lateral arm 44 to move.
After the insertion of the coil into the coil center hole is detected, the coil suspension 3
Since the hoisting of No. 3 is started, the coil 24 will not be hoisted when the insertion of the lateral arm 44 is insufficient. Therefore, there is no fear of the coil 24 falling and the safety is greatly improved. Further, since the lifting detection switch 46 informs that the coil 24 has been lifted, the safety of coil lifting and coil transportation is significantly improved.

[0026]

According to the present invention, it is possible to prevent workers' gloves and clothes from being damaged at the time of packing of coils such as steel strips and at the shipping destination, and also to prevent workers from being injured. , The safety can be greatly improved.

Also, according to the present invention, it is possible to accurately form the rounded shape of the corners of the coil protector at both ends in the circumferential direction.

[Brief description of drawings]

FIG. 1 is a coil protector 23 according to an embodiment of the present invention.
It is a perspective view which simplifies and shows the structure of.

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

FIG. 3 is a perspective view showing a state where an inner diameter ring 23 is partially expanded in a circumferential direction.

FIG. 4 is a perspective view showing the vicinity of one circumferential end portion 63 of both circumferential end portions 62, 63 of the inner diameter ring 23.

5 is a side view of a manufacturing apparatus 66 for manufacturing a metal plate material 65 that is a material of the inner diameter ring 23. FIG.

6 is a plan view of the manufacturing apparatus 66. FIG.

FIG. 7 is a plan view of a metal plate member 65 formed by the manufacturing apparatus 66 shown in FIGS. 5 and 6.

FIG. 8 is a bottom view of one blade 72.

9 is a perspective view of a part of the outer diameter ring 30. FIG.

10 is an inner diameter ring 23 and an outer diameter ring 30 shown in FIG.
It is a front sectional view showing the situation at the time of hoisting the coil 24 equipped with and.

11 is a front view showing a simplified configuration of a coil suspension 33 for hoisting the coil 24 shown in FIG.

[Explanation of symbols]

23 Inner Diameter Ring 24 Coil 25, 81 Axis 26, 86 Tube 27 Outward Flange 29 Packaging Paper 30 Outer Diameter Ring 31 Folds 32a, 32b Binding Hoop 33 Coil Hanger 38 Screw 41, 42 Lifting Arm 44 Side Arm 46 Lifting Detection Switch 48 Pushing projection 53 End face detection switch 55 Pushing pieces 62, 63, 92, 93 Ends 62a, 62b, 63a, 63b, 93a, 93b Corners 65, 67c1, 67c2 Metal plate 67 Steel strip 68, 69 Pinch roll 71 Cutting Devices 72, 73 Blade 74 Drive source 76 Symmetrical surfaces 77a, 77b Blade portion 78a First blade portion 79a1, 79a2 Second blade portion 87 Flange portion

Claims (3)

[Claims] 1. An outward flange portion that abuts an end surface of a coil having a long strip shape and extends outward in a radial direction, and the outward flange portion has an L-shaped cross section in a virtual plane including an axis of the coil. And a tubular portion that extends inward in the axial direction by contacting the inner peripheral surface of the center hole of the coil, and the outward flange portion and the tubular portion are circumferentially divided and are divided. Both ends in the circumferential direction overlap, and corners 62a, 62b; 63a, 63 at the both ends in the circumferential direction
A coil protector characterized in that b is formed to have a rounded shape. 2. An inward flange portion that is in contact with an end surface of a coil having a long strip shape and extends outward in the radial direction, and the inward flange portion has an L-shaped cross-section in an imaginary plane including the axis of the coil. And a tubular portion that extends inward in the axial direction by contacting the outer peripheral surface of the coil, the inward flange portion and the tubular portion being circumferentially divided, and the divided circumferential ends. And the corners 92a, 92b; 93a; 93 at both ends in the circumferential direction are overlapped.
A coil protector characterized in that b is formed to have a rounded shape. 3. The method for manufacturing a coil protector according to claim 1 or 2, wherein (a) a long metal strip is provided near a fixed blade 73 of a movable blade 72 disposed on both sides of the metal strip in a thickness direction. By moving
One of the pair of blades is cut, and one blade 72 is connected to the first blade portions 78a and 78b perpendicular to the longitudinal direction of the metal strip and the first blade portions at both widthwise end portions of the metal strip. Combination blade portions 77a and 77b including second blade portions 79a1 and 79a2; 79b1 and 79b2, which are rounded and curved inward in the longitudinal direction as they extend outward, extend in the thickness direction, and the longitudinal direction. Is formed symmetrically with respect to a plane of symmetry 76 perpendicular to, and the other blade 73 cuts the metal strip corresponding to the one blade 72, and both widthwise ends of the metal strip are of the coil protector. The corner 62
a, 62b; 63a, 63b: 92a, 92b; 93
a; 93b, and (b) the cut metal strip is plastically deformed to produce a coil protector.