KR101782401B1 - Belt Sling - Google Patents

Abstract

The present invention relates to an absorbent article comprising a first reinforcing sidewall portion composed of a body portion and an outer skin portion for woven a knot loop of a belt sling woven with synthetic fibers and provided on the front and back surfaces of the outer skin, A second reinforcing sidewall portion having an urethane layer formed on an upper surface thereof, a third reinforcing sidewall portion provided between the two second reinforcing sidewall portions, and a third reinforcing sidewall portion disposed between the front and rear surfaces of the outer skin The first and second reinforcing bars are respectively formed by connecting rings provided at one end of the first reinforcing barb part. When the body part and the outer skin are inserted into the coil steel plate and bent, the first and second reinforcing bars are woven with a high strength Kevlar yarn The third reinforcing sidewall portion and the second reinforcing sidewall portion to increase the wear resistance and the breaking strength, to increase the service life of the belt sling, to lower the manufacturing cost of the belt sling, Part to the configuration in the outer skin having a link relates to cargo transport belt sling of a high load so as to easily separate than the body portion and the outer skin.

Description

Belt Sling for heavy-duty cargo transportation {Belt Sling}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a belt sling for conveying heavy loads, and more particularly, to a belt sling for high-load cargo transportation, in which a belt sling woven with synthetic fibers is wound on a belt- The urethane layer is formed on the outer surfaces of the first, second, and third reinforcing strips and the second reinforcing pad portion to increase wear resistance and breaking strength, increase the service life of the belt slings, lower the manufacturing cost of the belt slings, And an outer skin having a connection part, so that the body part and the outer skin can be more easily separated from each other.

Generally, when a heavy cargo is to be easily transported by using a crane or the like, a cargo conveying belt sling is used for lifting the cargo from the lower part to the upper part.

In the case of using a steel wire, a belt sling for transporting heavy loads is used as a double-knot hook portion formed at both ends of the belt sling with a hook of a crane when a steel wire is used. A portion of the corner portion of the coiled steel sheet may be damaged in the process of being lifted while the insertion hole edge of the coiled steel sheet and the steel wire are bent while being in contact with both sides of the inner side of the insertion hole.

In addition, in order to prevent damage to the coil steel sheet by the steel wire when carrying such a heavy-duty coil steel sheet, a guard such as a waste tire is added to the portion where the coil steel plate and the steel wire are in contact with each other, Although it prevents damage to the coil signboard, labor costs are high in the process of putting a guard between the coil steel and the steel wire, and when the worker's finger is caught in the coil steel plate and the steel wire, There was a risk of safety accidents such as the accident.

In this way, a fabric belt is used to prevent a portion of the corner portion of the coil steel plate from being damaged when a belt sling is made of steel wire.

The belt sling includes a body portion having a predetermined length and a circular knot hook portion integrally formed at both ends of the body portion and hooked to a hook of a crane or the like, .

The body portion and the knot loop portion are composed of warp yarns woven in a predetermined pattern, weft yarns and fabrics in which a plurality of yarns are inspected longitudinally in the inside of the weft yarn.

That is, the body portion and the knot loop portion are structured such that a wedged warp and a deep rib are inserted in the longitudinal direction to enhance the durability inside the weft yarn.

However, the conventional belt sling has a problem in that it is made of a general polyester yarn composed of a warp yarn and a warp yarn constituting the body portion, and therefore the yarn can not easily be broken due to heavy weight of the cargo and frequent friction with the cargo.

In addition, the number of rubbing due to the relative contact with the load or the conveying means frequently occurs at the edge where the bar portion of the synthetic fiber yarn is stacked, corresponding to the upper end portion and the lower end portion of the body portion accommodating the load, It is economically disadvantageous to dispose of the entire band sling including the synthetic fiber yarn which does not cause damage to the yarn because the laminated structure is separated by the damage of the bar portion corresponding to the structure and the breaking strength of the body portion is remarkably weakened .

As a result, the service life of the belt sling is greatly shortened, and the belt sling is completely cut off during use, causing a safety accident caused by the fall of the cargo.

In order to solve the above-mentioned problems, the present invention provides a belt sling comprising: a body portion having a knot loop portion woven with synthetic fibers; a first reinforcing rib portion formed of a plurality of outer ribs on the front and back surfaces of the outer skin; A second reinforcing sidewall portion laminated on the upper surface of the first reinforcing sidewall portion and having a urethane layer formed on the upper surface thereof, a third reinforcing sidewall portion provided between the two second reinforcing sidewall portions, And a connecting ring provided at one end of each of the first reinforcing barbs at a selected one of the front and rear sides of the body. When the body and the outer skin are inserted into the coil steel and bent at both ends of the outer skin, a high strength kevlar kevlar yarns, and the urethane layer formed on the upper surface of the second reinforcing sidewall part to increase the wear resistance and breaking strength, increase the service life of the belt sling, The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a belt sling for conveying a high-load cargo, which comprises a body portion having a knot ring portion and an outer skin portion having a connection ring portion.

And the second reinforcing sidewall portion 40 is easily detached when the second reinforcing sidewall portion 40 is damaged, so that the risk of a safety accident can be prevented by replacing the belt sling.

In order to achieve the above object, the present invention provides a belt sling for high-load cargo transportation, comprising: a body portion 10 having circular knot hooks 11 at both ends thereof and having a predetermined length; A belt sling for heavy cargo transportation comprising an outer skin (20) having an inner periphery of a main body (21) inserted around an outer periphery of the body part (10) and having a predetermined length,
A first reinforcing stripe 30 provided on the front and rear surfaces of the outer skin 20 in a plurality of lengthwise directions and having a predetermined length; A second reinforcing strip portion 40 provided on the upper surface of the first reinforcing strip portion 30; A third reinforcing sidewall 50 installed in the longitudinal direction between the first reinforcing sidewall portions 30 and stacked in a plurality of layers; A connecting claw portion (60) provided at one end of the first reinforcing sidewall portion (30) at a selected one of the front and rear surfaces of the outer skin (20); And a reinforcing outer skin (70) inserted around the outer periphery of the knot collar (11)

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And an extension strip portion (80) provided at one end of the first reinforcing strip portion (30) at any one of the front and rear surfaces of the outer skin (20).

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The first, second, and third reinforcing ribbons 30, 40, and 50 may be fabricated from high strength Kevlar yarn made of artificial synthetic fibers.

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The present invention relates to an absorbent article comprising a first reinforcing sidewall portion composed of a body portion and an outer skin portion for woven a knot loop of a belt sling woven with synthetic fibers and provided on the front and back surfaces of the outer skin, A second reinforcing sidewall portion having an urethane layer formed on an upper surface thereof, a third reinforcing sidewall portion provided between the two second reinforcing sidewall portions, and a third reinforcing sidewall portion disposed between the front and rear surfaces of the outer skin The first and second reinforcing bars are respectively formed by connecting rings provided at one end of the first reinforcing barb part. When the body part and the outer skin are inserted into the coil steel plate and bent, the first and second reinforcing bars are woven with a high strength Kevlar yarn The third reinforcing slack portion and the second reinforcing sock portion, the wear resistance and the breaking strength are increased, the service life of the belt sling is increased, and the outer portion of the outer sock having the body portion having the knot claw portion and the connecting claw portion Configuration has the effect of easily separated than the body portion and the outer skin.

The belt sling according to the present invention is characterized in that the body portion, the outer skin, the connecting ring portion are woven with synthetic fibers, the first, second and third ribbed portions provided on the upper surface of the outer skin, And the manufacturing cost of the belt sling is made to be the minimum cost so as to lower the manufacturing cost of the belt sling.

In addition, when the second reinforcing pad part is damaged by changing the color of the first and second reinforcing pad parts, the belt sling is easily exchanged with the naked eye so that the risk of a safety accident can be prevented.

1 is a perspective view according to the present invention;
FIG. 2 is a schematic cross-sectional view illustrating first, second, and third reinforcing strips, an outer skin, a body portion, a connecting loop, and a urethane coating layer according to the present invention.
3 is a schematic view showing a knot loop according to the present invention.
4 is a schematic view of an extension strip according to the present invention.
5 is a schematic cross-sectional view showing the use state according to the present invention.
6 and 7 are experimental result tables of the present invention.

For a better understanding of the present invention, a preferred embodiment of the present invention will be described with reference to the accompanying drawings.

The embodiments of the present invention may be modified in various forms, and the scope of the present invention should not be construed as being limited to the embodiments described in detail below. The present embodiments are provided to explain the present invention more safely to those having ordinary skill in the art.

Therefore, the shapes and the like of the elements in the drawings can be exaggeratedly expressed to emphasize a clearer description. It should be noted that in the drawings, the same members are denoted by the same reference numerals.

FIG. 1 is a perspective view of the present invention, FIG. 2 is a schematic sectional view showing a first, second, and third reinforcing strips, an outer skin, a body portion, a connecting loop, and a urethane coating layer, FIG. 4 is a schematic view showing an extension band according to the present invention, FIG. 5 is a schematic cross-sectional view showing a use state according to the present invention, and FIGS. 6 and 7 are experimental result tables of the present invention.

The belt sling for conveying heavy loads according to the present invention will be described in detail with reference to FIGS. 1 to 7.

The belt sling for conveying a heavy load according to the present invention is a conveying tool used for conveying a heavy cargo by using a crane or the like. The belt sling includes an insertion hole (not shown) formed in a coil steel sheet (a) b) The body portion 10 of the belt sling is inserted so that the hook c of the crane (not shown) is hooked and moved to the knot hook portion 20 provided at both ends of the body portion 10 .

Such high-load belt sling for conveying cargo is made of synthetic fibers.

The belt sling of the present invention comprises a body 10 and a knot loop 20, a first reinforcing padding 30, a second reinforcing padding 40, a third reinforcing padding 50, A connection claw portion 60, and a reinforcing outer skin 70

That is, the body portion 10, the knot hook 11, the outer skin 20, the connecting hook portion 60, the reinforcing outer skin 70, and the reinforcing outer skin 70 constituting the belt slings for transporting a heavy load according to the present invention The first reinforcing strip 30, the second reinforcing strip 40 and the third reinforcing strip 50 are knitted with a high strength synthetic fiber yarn kevlar, .

The body portion 10 is configured to have a length in a predetermined longitudinal direction.

And the knot loops 11 are formed at both ends of the body 10.

The first reinforcing sidewall portions 30 are provided on the front and rear surfaces of the body portion 10 in plural or more.

That is, the first reinforcing strip 30 is spaced from the front and rear of the body 10 so that a space is formed between the first reinforcing strip 30 and the first reinforcing strip 30.

This space is constituted by a third reinforcing strip portion 50 to be described later.

It is preferable that the first reinforcing strip 30 is provided on the front and rear of the body 10 so that the first reinforcing strip 30 covers the front surface of the body 10, The number of backplanes is not limited.

The first reinforcing strip 30 is provided at both edges of the front and back surfaces of the outer skin 20 in the longitudinal direction and sewed to the sewing thread.

Also, a second reinforcing strip portion 40 laminated on the upper surface of the first reinforcing strip portion 30 is provided.

The second reinforcing sidewall portion 40 may be provided on both edges of the outer skin 20 at the upper portion of the first reinforcing sidewall portion 30 so as to be installed in a portion where the load of the heavy load is concentrated Prevent damage to the belt sling.

The urethane layer 40a is formed on the outer surface of the second reinforcing sidewall 40 at a constant height.

(B) of the coil steel plate (a) when the coil is to be used to lift up the coil steel plate (a) during solidification by forming and forming a second reinforcing strip unit (40) woven with a conventional high strength synthetic fiber kevlar, The sharp edge portion of the inner circumference is brought into contact with the second reinforcing strip portion 40 woven with a Kevlar yarn so that the edge edge portion receives the greatest load and the sharp edge of the inner circumferential edge of the insertion hole b of the coiled steel sheet The second reinforcing ribbing portion 40 which is in high contact with the edge portion is damaged and the second reinforcing ribbing portion 40 is not protected so that it is frequently exchanged. The disadvantage of the second reinforcing ribbing portion 40 is that the load is concentrated on the second reinforcing ribbing portion 40 is formed on the outer surface of the urethane layer 40a so that the urethane layer 40a has a corresponding force from a sharp portion on the inner periphery of the insertion hole b to protect the second reinforcing sidewall 40 The second reinforcement strip portion 40 is damaged And it is possible for a long period of time the second reinforcing fleeting ttibu 40 is prevented.

The second reinforcing sidewall 40 is installed in the first reinforcing sidewall 30 in the longitudinal direction and sewed to the sewing thread.

When the second reinforcing ribbing portion 40 is provided on the upper surface of the first reinforcing ribbing portion 30, the second reinforcing ribbing portions 40 are preferably stacked in a plurality of layers.

The second reinforcing strip portion 40 and the third reinforcing strip portion 50 are formed to have a predetermined length inward from both ends of the upper surface of the first reinforcing strip portion 30, 30 are exposed on the upper surface of the first reinforcing sidewall 30.

The first, second, and third reinforcing ribbons 30, 40, 50 may be woven with high strength kevlar yarn, synthetic synthetic fiber.

The first, second and third reinforcing strips 30, 40, 50 are woven with a kevlar staple. The first, second and third reinforcing strips 30, 40, 50) is reinforced with durability so that the surface of the coiled steel plate (a) is not damaged or damaged by the sharpened portion of the inner circumferential end face of the insertion hole (b) Which is provided on the upper surface of the outer skin 20 and intensively receives the load of the package, is provided on the outer skin 20, the outer skin 20, and the connecting ring portion 60, Only a few reinforcing strips 30, 40 and 50 are woven with a kneader so as to minimize the manufacturing cost of the belt slings of the present invention, while reducing the manufacturing cost of the belt slings.

As described above, the first reinforcing sidewall 30 woven in the Kevlar yarn is provided at both edges of the front and rear surfaces of the outer skin 20 in the longitudinal direction, and the upper surface of the first reinforcing sidewall 30 The second reinforcing sidewall portion 40 woven with a Kevlar yarn and the third reinforcing sidewall portion 50 woven with a Kevlar yarn between the first and second reinforcing sidewall portions 30 and 40, The outer skin 20 having the body portion 10 is inserted into the insertion hole b of the coiled steel plate a and the body portion 10 is inserted into the hook c of the crane. Both sides of the upper portion of the outer skin 20 come into contact with both sides of the inner side surface of the insertion hole (b) and are bent when the upper portion of the outer skin (20) is lifted by the knot ring portion (11).

At this time, the load of the coil steel plate (a) is concentrated on both sides of the insertion hole (b). That is, when the load of the coiled steel plate (a) is concentrated on both sides of the upper portion of the outer skin 20, and the outer edges of the outer skin 20 are damaged, damaged, The edges of the body portion 10 provided inside the outer skin 20 are also damaged or damaged or damaged even when the outer skin 20 and the body portion 10 are cut off, To prevent the first and second reinforcing strip portions 30 and 40 woven with Kebler yarns installed on the front and rear surfaces of the second reinforcing strip portion 40 and the urethane layer 40a formed on the upper surface of the second reinforcing strip portion 40 to be.

The urethane layer 40a is formed such that when both side surfaces of the upper portion of the insertion hole b of the coiled steel plate a are brought into contact with the second reinforcing padding portion 40 for a repetitive long term, the second reinforcing padding portion 40 Damage, breakage, or damage to the product.

And the third reinforcing sidewall portions (50) stacked in a plurality of layers between the second reinforcing sidewall portions (40).

Although it is preferable that the third reinforcing stripe portions 50 are formed by stacking a plurality of layers, the number of stacking layers of the third reinforcing stripe portion 50 is not limited.

The third reinforcing sidewall portion 50 is formed between both of the second reinforcing sidewall portions 40 in such a manner that the body portion 10 is formed in the insertion hole b of the coil steel sheet a When the outer skin 20 having the outer skin 20 is inserted and lifted by the hooks of the crane at the both ends of the body part 10 by the knot loop part 11, b and bend.

At this time, the load of the coil steel plate (a) is concentrated on both sides of the insertion hole (b). That is, when the load of the coil steel sheet (a) is concentrated on both sides of the upper portion of the outer skin 20 and the process is continuously repeated for a long period of time, the first and second reinforcing strips 30 The edges of the body portion 10 provided on the inner side of the first and second reinforcing shoulder portions 30 and 40 and the outer skin 20 are also damaged or damaged , Or even the outer skin (20) is cut off by the third reinforcing sidewall (50) provided between the first and second reinforcing sidewalls (30, 40).

The first and second reinforcing strips 30 and 40 are used in different colors.

The first reinforcement rib portion 30 and the second reinforcement rib portion 30 appear between the second reinforcing rib portions 30 and 40 of the damaged portion when the second reinforcing rib portion 40 is damaged by changing the colors of the first and second reinforcing rib portions 30 and 40, It is possible to easily identify whether or not the second reinforcing sidewall 40 is damaged by the naked eye due to the color difference between the belt portions 30 and 40. Thus, the damaged belt sling can be directly replaced without using the damaged belt sling, It can be prevented in advance.

The connection claws 60 are respectively installed at one end of the first reinforcing sidewall 30 at any one of the front and rear surfaces of the outer skin 20.

The connecting claws 60 are respectively installed at one end of the first reinforcing sidewall 30 at any one of the front and rear surfaces of the outer skin 20, To easily separate the inside of the outer skin (20).

That is, the knot hook 11 of the body part 10 is fixed to a fixing part (not shown), and the connecting hook part 60 is moved to a moving means (not shown) So that the body 10 and the outer skin 20 are easily separated from each other.

The reinforcing outer skin (70) is inserted around the outer periphery of the knot collar (11).

As described above, the reinforcing outer skin 70 is provided around the outer periphery of the knot collar 11 by connecting the outer portion of the knot collar 11 to the hook c of the crane (not shown) The weight of the coil steel plate a is transmitted to the hook c and the knot hook 11 so that the knot hook 11 hooks the hook c), the inner periphery of the reinforcing outer skin 70 is inserted around the outer periphery of the knot collar 11 to prevent damage and breakage.

The extension strip portion 80 is formed at one end of the first reinforcing strip portion 30 at any one of the front and rear surfaces of the outer skin 20.

The connecting ring portion 60 and the reinforcing outer skin 70 and the extension band portion 80 are also woven with a Kevlar yarn to reinforce the durability of the reinforcement outer skin 70 and the extension band portion 80.

As described above, providing the extension strip portion 80 at one end of the first reinforcing strip portion 30 is advantageous in that:

The outer skin 20 is prevented from flowing down when the coiled steel plate a is moved to the moving position and the belt sling is pulled out from the insertion hole b of the coiled steel plate a, To adjust the length of the outer skin 20 and the first, second, and third overhang portions 30, 40, 50 so as to extend the service life of the belt sling.

Evaluation of Tensile Strength and Durability Test of Belt Sling 1 of the Present Invention Evaluation items unit Goal of this project Achievement of this project Test Specification
Test institute
(Field verification company) 1. Tensile strength Ton 90
(1:15, U: 30) 110 KS K 0929
A.2.2.
A.3.2. Petty Testing Researcher 2. Weight kg 23 17 KS K ISO 9864 Petty Testing Researcher 3. Durability Number of times 500 times 500 times Demand Demand Petty Testing Researcher

As shown in Table 1 above, the belt sling 1 of the present invention was tested for tensile strength and durability, and it was found that after performing the field belt sling 500 times at a hot-rolled coil weight of 19.970 kgs, There was no deviation and there was no abnormality on the outer appearance.

The urethane layer 40a was formed on the upper surface of the second reinforcing sidewall 40 and the untreated urethane layer 40a was tested by dividing the urethane layer 40a. The portion of the second reinforcing sidewall 40 without the layer 40a is considered to affect the belt sling due to the sagging of the fabric. Thus, the second reinforcing sidewall 40, on which the urethane layer 40a is formed, Can be judged to be protected from the sharp portion of the insertion hole (b) of the steel coil (a).

Evaluation of Tensile Strength and Durability Test of Belt Sling 2 of the Present Invention over Coil Steel Plate of 25 Ton Evaluation items unit Goal of this project Achievement of this project Test Specification
Test institute
(Field verification company) 1. Tensile strength Ton 108
(1: 18, U: 36) 128 KS K 0929
A.2.2.
A.3.2. Petty Testing Researcher 2. Weight kgs 28 19 KS K ISO 9864 Petty Testing Researcher 3. Durability Number of times 500 times 500 times Demand Demand Petty Testing Researcher

As shown in Table 2, the belt sling 2 according to the present invention was tested for tensile strength and durability, and it was found that the belt sling body of the present invention was ruptured after 500 times of the field belt sling at a weight of 26,660 kgs, There was no deviation and there was no abnormality on the outer appearance.

The urethane layer 40a was formed on the upper surface of the second reinforcing sidewall 40 and the untreated urethane layer 40a was tested by dividing the urethane layer 40a. The portion of the second reinforcing sidewall 40 without the layer 40a is considered to affect the belt sling due to the sagging of the fabric. Thus, the second reinforcing sidewall 40, on which the urethane layer 40a is formed, Can be judged to be protected from the sharp portion of the insertion hole (b) of the steel coil (a).

The present invention is characterized in that a belt sling woven with a synthetic fiber yarn is constituted by the body portion 10 and the outer skin 20 which sweep the knot loop portion 11, A plurality of first reinforcing ribbing portions 30 provided on the upper surface of the first reinforcing ribbing portion 30, the reinforcing ribbing portions 30 being formed of a plurality of or more woven with a high strength kevlar yarn as an artificial synthetic fiber, The second reinforcing sidewall portion 40 having the urethane layer 40a formed thereon and the third reinforcing sidewall portion 50 provided between both the second reinforcing sidewall portions 40, The body portion 10 and the outer skin 20 are connected to the coil steel plate 20 by the connecting claw portion 60 provided at one end of the first reinforcing sidewall portion 30, (30, 40, 50) and the second reinforcing rib (30), which are both ends of the outer skin (20) when inserted into the insertion hole (b) (10) having the knot collar (11) and the end portion of the belt loop (10) having the knot collar (11) can be made stronger by increasing the wear resistance and breaking strength by the urethane layer (40a) And the outer skin 20 having the connecting hook portion 60 to separate the body 10 and the outer skin 20 more easily.

It will be apparent to those skilled in the art that various modifications and equivalent arrangements may be made therein without departing from the scope of the present invention. . It is therefore to be understood that the invention is not limited to the form set forth in the detailed description.

Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims. It is also to be understood that the invention includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.

10: body part 11: knot hook part
20: outer skin 21: body
22a: first rivet 22b: second rivet
24: wire 30: first reinforcement rib section
40: second reinforcing strip portion 50: one side seam
60: non-reinforcing skin

Claims (8)

In high-load cargo belt sling,
A body portion 10 having circular knot hooks 11 at both ends and having a predetermined length; A belt sling for heavy cargo transportation comprising an outer skin (20) having an inner periphery of a main body (21) inserted around an outer periphery of the body part (10) and having a predetermined length,
A first reinforcing stripe 30 provided on the front and rear surfaces of the outer skin 20 in a plurality of lengthwise directions and having a predetermined length; A second reinforcing strip portion 40 provided on the upper surface of the first reinforcing strip portion 30; A third reinforcing sidewall 50 installed in the longitudinal direction between the first reinforcing sidewall portions 30 and stacked in a plurality of layers; A connecting claw portion (60) provided at one end of the first reinforcing sidewall portion (30) at a selected one of the front and rear surfaces of the outer skin (20); And a reinforcing outer skin (70) inserted around the outer periphery of the knot collar (11)
And an extension strip portion (80) provided on one end of the first reinforcing strip portion (30) at any one of the front and rear surfaces of the outer skin (20)
The outer skin 20 is prevented from flowing down when the coiled steel plate a is moved to the moving position and the belt sling is pulled out from the insertion hole b of the coiled steel plate a, Wherein the first and second reinforcing rib portions (30, 40, 50) are bent to adjust the outer skin (20) and the first, second and third reinforcing rib portions (30, 40, 50) . delete delete delete delete delete The method according to claim 1,
The first, second and third reinforcing strips 30, 40, 50 are formed by weaving with a high strength Kevlar yarn made of artificial synthetic fiber,
The second reinforcing ribbing section (30), the second reinforcing ribbing section (40) which is laminated on the upper surface of the first reinforcing ribbing section (30) and has a urethane layer (40a) , The third reinforcing sidewall portion (50) provided between the second reinforcing sidewall portions (40), and the third reinforcing sidewall portion (50) provided on both the front and rear surfaces of the outer skin (20) And the connecting portion 60 is provided at one end of the outer shell 30. When the body 10 and the outer skin 20 are inserted into the insertion hole b of the coil steel plate a and bent, (30, 40, 50) and the urethane layer (40a) formed on the upper surface of the second reinforcing sidewall portion (40) So as to increase the service life of the belt sling. The method according to claim 1,
Wherein the first and second reinforcing strips (30, 40) have different colors.

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