KR101893009B1 - Belt strap having an elasticity - Google Patents

Abstract

Disclosed is an elastic belt strap. According to the present invention, the elastic belt strap comprise: an elastic strap woven with a rubber yarn and synthetic fiber and wrinkled in the longitudinal direction; and a connecting strap continuously woven on both lateral sides of the elastic strap and cutting the rubber tarn exposed to the outside.

Description

[0001] BELT STRAP HAVING AN ELASTICITY [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a belt cord having elasticity, and more particularly, to a belt cord having elasticity capable of improving ease of use and buffering an impact load.

Generally, when an operator performs an operation in a structure installed at a high position from the ground such as a construction site for building a high-rise structure such as a building or a bridge, a shipyard for drying a large ship, , It is obligatory to wear personal safety protective gear such as safety swings for safety work and safety helmets as safety protective gears in order to protect workers from danger such as falling accidents.

In particular, the safety swing worn to prevent a fall accident at the time of a high altitude operation is intended to prevent an injury by mitigating impact applied to an operator by a human body load in a fall.

Such a safety swing according to the prior art includes a shoulder belt worn on both shoulders of the worker, a chest belt fastened to the chest of the worker, and an "X" A backrest belt, and a leg belt integrally formed with a shoulder belt and a backrest belt and worn on the leg portion of the worker, and an impact absorbing lanyard is provided at an intersection of the back belt.

However, since the shoulder belt, the leg belt, etc. used in the safety swing according to the prior art are woven with fibers having no elasticity, it is inconvenient to the operator because of the poor feeling of fit, and in particular, a strong load generated at the time of fall is directly applied to the worker, .

Accordingly, there is a need for a safety swing belt strap that improves the convenience of use of the worker and can evenly distribute and buffer the impact load applied to the worker by the human body load in the fall.

Registered Utility Model No. 20-0471729 of the Republic of Korea (Announcement of Mar. 19, 2014)

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a belt cord having ease of use and elasticity capable of absorbing an impact load.

According to one aspect of the present invention, there is provided an elastic cord which is woven with a rubber yarn and a synthetic fiber and formed to be wrinkled in a longitudinal direction; And a connecting cord having a rubber yarn which is continuously woven on both sides of the elastic cord and which is exposed to the outside and is cut off.

The elastic cord is woven including a first upper fabric and a first lower fabric, and the rubber yarn is repeatedly weaved alternately with the first upper fabric and the first lower fabric to form pleats.

Wherein the rubber yarn of the elastic cord is disposed between the first upper fabric and the first lower fabric at a predetermined distance as a warp yarn after being laid on a lower side of a plurality of continuous weft yarns positioned on the first lower yarn, And repeating a weaving process in which the weft yarn is laid on the upper side of the first upper fabric and interlaced on the upper side of a plurality of continuous weft yarns arranged at a predetermined distance between the first upper fabric and the first lower fabric have.

Wherein the first upper fabric is woven from the first upper fabric to a synthetic fiber and a weft yarn having a first tier, a fourth tier, a seventh tenth tenth tenth inclination, a second upper tier and a fifth tier, The first lower fabric is woven with a synthetic fiber and a weft yarn, which are the tenth and eleventh tiles, and the third and ninth and thirteenth yarns are knitted with the first upper fabric and the first lower fabric And the rubber yarns No. 6 and No. 12 can be alternately woven in the first upper fabric and the first lower fabric by repeatedly examining and tilting.

Wherein the connecting cord is woven including a second upper fabric woven in succession to the first upper fabric and a second lower fabric woven in succession to the first lower fabric, And a first weave portion that is received between the fabric and the second lower fabric.

The rubber yarn extending from the elastic cord may weave the second upper fabric and the second lower fabric as pharmacists.

The first weaving machine woven the second upper fabric with the first, fourth, seventh, and tenth inclined synthetic fibers and weft yarns, and second, fifth, and eighth yarns The second lower fabric is woven with a synthetic fiber having an inclination of 11 and a weft yarn, and the second upper fabric and the second lower fabric are woven with rubber yarn as No. 6 and No. 12 pharmacist yarn extended from the elastic cord , And the third, ninth, and thirteenth examination yarns may be disposed between the second upper fabric and the second lower fabric.

Wherein the connecting cord is woven including a third upper fabric woven in succession to the second upper fabric and a third lower fabric woven continuously to the second lower fabric, And a second weaving unit that is exposed.

The second weaving machine woven the third upper fabric with the first, fourth, seventh, and tenth inclined synthetic fibers and weft yarns, and second, fifth, and eighth yarns The third lower fabric is woven with a synthetic fiber having an inclination of 11 and a weft yarn, and a synthetic fiber having a third and a ninth inclination is disposed between the third upper fabric and the third lower fabric, The third upper fabric and the third lower fabric are weaved with a phosphorus yarn and the sixth and twelfth rubber yarns extending from the first weaving yarn are weaved with at least one of the third upper fabric and the third lower fabric And can be exposed to the outside through one.

The width of the elastic cord may be greater than the width of the connection cord.

The density of the weft yarn on the elastic cord may be greater than the density of the weft yarn on the connecting cord.

The width of both ends of the elastic cord may be smaller than the width of the middle portion of the elastic cord and decrease gradually to correspond to the width of the connection cord.

The density of the weft yarn at both ends of the elastic cord is smaller than the density of the weft yarn at the middle portion of the elastic cord and can be reduced gradually.

The embodiment of the present invention provides a belt cord having elasticity so that the belt strap is brought into close contact with the worker and the user's shoulders and legs to improve the fit feeling and does not flow down from the shoulder or the like.

Further, the embodiment of the present invention can reduce the load of the safety swing and bag or the like applied to the operator or the user by providing the belt strap having elasticity.

In addition, the embodiment of the present invention provides a belt having elasticity, thereby absorbing and absorbing an impact load applied to an operator at the time of fall, thereby further mitigating the impact applied to the operator.

1 is a perspective view showing a case in which a belt having elasticity according to the present invention is applied to a safety swing.
Fig. 2 is a perspective view showing a case in which a belt having elasticity according to the present invention is applied to a waist belt. Fig.
3 is a perspective view showing a case in which a belt cord having elasticity according to the present invention is applied to a bag.
4 is a plan view showing a belt cord having elasticity according to the present invention.
5 is a perspective view showing a state in which a belt having elasticity according to the present invention is woven.
6 is an organization chart for weaving an elastic cord according to the present invention.
7 is a cross-sectional view showing a weaving state of the elastic cord according to the present invention.
8 is an organization chart for weaving a first weave portion according to the present invention.
9 is a cross-sectional view showing a weaving state of the first weave portion according to the present invention.
10 is an organization chart for weaving a second weave portion according to the present invention.
11 is a cross-sectional view showing a weaving state of the second weft portion according to the present invention.

In order to fully understand the present invention, operational advantages of the present invention, and objects achieved by the practice of the present invention, reference should be made to the accompanying drawings and the accompanying drawings which illustrate preferred embodiments of the present invention.

Hereinafter, the present invention will be described in detail with reference to the preferred embodiments of the present invention with reference to the accompanying drawings. Like reference symbols in the drawings denote like elements.

FIG. 1 is a perspective view showing a case in which a belt having elasticity according to the present invention is applied to a safety swing, FIG. 2 is a perspective view showing a case in which a belt having elasticity according to the present invention is applied to a waist belt, FIG. 4 is a plan view showing a belt cord having elasticity according to the present invention, and FIG. 5 is a plan view showing the elastic cord belt according to the present invention when the belt cord having elasticity is woven FIG. 7 is a cross-sectional view showing a state in which the elastic cord according to the present invention is woven, and FIG. 8 is a perspective view showing a state in which the first weaving unit according to the present invention FIG. 9 is a cross-sectional view showing the weaving state of the first weave portion according to the present invention, and FIG. 10 is a sectional view showing the second weave portion according to the present invention For an organization chart, Figure 11 is a cross-sectional view showing a weaving condition second woven portion in accordance with the present invention.

1, the safety swing 10 includes a shoulder belt 11 to be worn on both shoulders of a worker, a chest belt 13 to be fastened to the chest area of the worker, A back belt 15 formed to cross the back portion of the worker, a leg belt 17 worn on the leg portion of the worker, and a waist belt 19 worn on the waist. The shoulder belt 11, the leg belt 17, and the backrest belt 15 may be integrally formed, or may be connected to each other. Here, the shoulder belt 11 and the leg belt 17 may be composed of a belt strap 30 having elasticity. Referring to Fig. 2, the waist belt 19 may be composed of a belt strap 30 having elasticity.

Referring to FIG. 3, the bag 20 includes a bag body 21 in which an article is received, and a shoulder belt 23 connected to the bag body 21 and worn on both shoulders of the user. Here, the shoulder belt 23 may be composed of a belt strap 30 having elasticity.

As shown in FIGS. 1 to 3, the elastic band strap 30 according to the present invention can be applied to various industrial safety swings 10, bags 20 and the like.

Hereinafter, a belt cord 30 having elasticity according to the present invention will be described.

Referring to FIG. 4, the elastic belt 30 having elasticity according to the present invention includes rubber yarns S6 and S12, an elastic cord A which is woven with a synthetic fiber and is formed in a longitudinal direction to be corrugated, And a connecting cord B which is continuously woven on both sides of the rubber sheet S6 and S12 exposed to the outside and is cut.

The elastic cord A according to the present embodiment is woven with synthetic yarns S6 and S12 to provide elasticity and is formed to be wrinkled in the longitudinal direction so that it can be stretched in the longitudinal direction.

The shoulder belt 11, the leg belt 17 and the like of the safety swing 10 and the shoulder belt 23 of the bag 20 and the like.

In the case of being used for the safety swing (10), when the weight of the worker is applied at the time of fall, the existing elasticity of the shoulder belt or the like is likely to cause injury to the worker because the impact load is transmitted to the worker. It is possible to buffer and absorb the impact load applied to the operator in the case of applying the elastic strap (A), which is useful for preventing injury of the operator.

The elastic strap A according to the present embodiment is formed so as to be wrinkled in the longitudinal direction so that when the operator or the user wears the safety swing 10 or pads the bag 20, the shoulder belts 11, 23, 17 and the like are in close contact with the worker or the user's shoulder or legs, so that they are excellent in wearing comfort, and they do not flow out from the shoulder or the like, so that convenience of operation and ease of use can be improved.

Also, the elasticity of the elastic cord A according to the present embodiment can alleviate the load transmitted to the operator or the user such as the safety spindle 10 and the bag 20.

Also, the elastic cord A according to the present embodiment may be woven with a tube fabric having a first upper fabric U1 and a first lower fabric D1.

The connecting strap B according to the present embodiment is continuously woven on both sides of the elastic strap A and is joined to the safety swing 10 or the bag 20 or the like.

The connection cord B is used by cutting the exposed rubber yarns S6 and S12 while exposing the rubber yarns S6 and S12 to the outside to externally expose the elastic cord A to elasticity.

The connection cord B includes a first weave portion B1 which is continuously woven on the elastic cord A and allows the rubber threads S6 and S12 extended from the elastic cord A to be received therein, And a second weaving portion B2 that is continuously woven in the first weaving portion B1 and exposes the rubber yarns S6 and S12 extending from the first weaving portion B1 to the outside.

The first weaving portion B1 is formed in order to allow the rubber yarns S6 and S12 to have elasticity in the elastic cord A before the rubber yarn S6 and S12 are exposed to the outside in the second weaving portion B2, It serves to hold rubber yarn (S6, S12).

The first weaving section B1 comprises a second upper fabric U2 which is successively woven into the first upper fabric U1 and a second lower fabric D2 which is successively woven into the first lower fabric D1 .

The first weaving section B1 is also made up of rubber warp yarns S6 and S12 so that the rubber yarns S6 and S12 extending from the elastic strap A are disposed between the second upper weft yarn U2 and the second lower weft yarn D2. ) Weaves the second upper fabric (U2) and the second lower fabric (D2) as pharmacists. In other words, the first weaving part B1 may be woven in a double yarn having a second upper fabric U2 and a second lower fabric D2.

In this embodiment, the first weaving unit B1 is shown as a double yarn in which the rubber yarns S6 and S12 weave the second upper weave U2 and the second lower weave D2 as pharmacists, but not limited thereto Although not shown in the figure, the first weaving section B1 is formed such that the rubber yarns S6 and S12 extending from the elastic strap A are disposed between the second upper fabric U2 and the second lower fabric D2, (Not shown) woven with rubber yarns S6 and S12 disposed between the fabric U2 and the second lower fabric D2. That is, the first weaving section B1 may be woven in a triplet with a second upper fabric U2, a second lower fabric D2 and an intermediate fabric. And the rubber yarns S6 and S12 are disposed between the second upper fabric U2 and the second lower fabric D2.

The second weaving portion B2 serves to expose the rubber yarns S6 and S12 extending from the first weaving portion B1 to the outside.

The second weaving part B2 comprises a third upper fabric U3 which is successively woven on the second upper fabric U2 and a third lower fabric D3 which is successively woven on the second lower fabric D2 And can be woven in a double fabric.

5, the second weaving portion B2 is formed by exposing the elastic yarn A and the rubber yarns S6 and S12 extending from the first weaving portion B1 to the outside to expose the rubber yarns S6 and S12, Is removed.

4, since the elastic strap A directly corresponds to an area in which the elastic strap A is in close contact with the worker or a user's shoulder, leg or the like, the width W1 of the elastic strap A is not Width W3.

To this end, the density of the weft yarn T in the elastic cord A is greater than the density of the weft yarn T in the connecting cord B. Here, the density of the weft yarn (T) is defined as the number of weft yarns (T) per unit length.

In the present embodiment, the density of the weft yarn T in the elastic cord A is 12 / inch, the density of the weft yarn T in the connecting cord B is 8 / inch, And the width W1 of the elastic cord A and the width W3 of the connection cord B can be variously set.

The width W2 of both ends A2 of the elastic cord A is smaller than the width W1 of the intermediate portion A1 of the elastic cord A and gradually decreases so that the width W3 ). ≪ / RTI >

To this end, the density of the weft yarn T at both ends A2 of the elastic cord A is smaller than the density of the weft yarn T at the intermediate portion A1 of the elastic cord A, Corresponds to the density of the weft yarn (T) in the connecting cord (B).

5 to 11, the weaving operation of the elastic belt belt 30 according to the present invention will be described as follows.

6, 8, and 10, the elastic belt straps 30 of the present embodiment include synthetic fibers S1 to S5, S7 to S11, and S13 that are divided into the first to thirteenth sections, The yarns S6 and S12 are formed as one unit and the plurality of unit bodies are arranged in the longitudinal direction and the width direction.

5 to 7, the elastic cord A according to the present embodiment includes a first upper fabric U1 and a first lower fabric D1.

The elastic string A is formed by alternately woven rubber threads S6 and S12 on the first upper fabric U1 and the first lower fabric D1 to form the elastic cord A in a corrugated shape, Give elasticity.

The rubber yarns S6 and S12 are repeatedly woven or not woven with the weft yarn T. When the rubber yarns S6 and S12 are woven with the weft yarn T, (T) and when not woven, it functions as an examination.

As shown in Figs. 6 and 7, the rubber yarns S6 and S12 are laid on the underside of a plurality of continuous weft yarns T positioned in the first lower fabric D1 as a warp yarn, After a predetermined distance between the first upper fabric U1 and the first lower fabric D1 and being laid on the first upper fabric U1 as a warp and wefted over a plurality of successively arranged weft yarns T, As a check, the weaving process is repeated between the first upper fabric U1 and the first lower fabric D1 at a predetermined distance.

In this embodiment, the rubber yarns S6 and S12 are woven into the lower side of the three weft yarns T which are successively arranged on the first lower fabric D1, or are continuously laid on the first upper fabric U1 Although the three weft yarns are shown to be bonded to the upper side of the synthetic fiber T, the scope of the present invention is not limited thereto.

Preferably, the rubber yarns S6 and S12 are interlaced on the upper side or the lower side of the continuously-arranged two to five weft yarns T. This is because it is difficult to cause the elastic cord A to be corrugated when the rubber yarns S6 and S12 are woven into the upper side or the lower side of the weft yarn T which is one weft and the upper side of the synthetic yarn T, The rubber yarns S6 and S12 may enter the outside of the elastic cord A and the rubber yarns S6 and S12 may be broken due to friction.

On the other hand, the rubber yarns S6 and S12 may be woven in a stretched state of 50 to 90% of the total elongation length, but the scope of the present invention is not limited thereto.

Specifically, the first upper fabric U1 is woven with synthetic fibers S1, S4, S7, and S10, which are first, fourth, seventh, and tenth tapers, and a weft yarn T. The first lower fabric D1 is weaved with synthetic fibers S2, S5, S8, S11 and weft yarns T, which are the second, fifth, eighth and eleventh tilts.

The sixth and twelfth rubber warp yarns S6 and S12 are alternately weighed and warped so as to be alternately woven into the first upper fabric U1 and the first lower fabric D1 to form the elastic cord A in a corrugated form Thereby giving the elastic cord A elasticity.

And the third, ninth and thirteenth examination yarns S3, S9 and S13 are arranged between the first upper fabric U1 and the first lower fabric D1.

The weaving operation of the connecting cord B which is continuously woven on the elastic cord A will be described with reference to FIGS. 8 to 11. FIG.

The connecting cord B is woven continuously on both sides of the elastic cord A. The connecting cord B positioned on the right side of the elastic cord A is woven and continuously bonded to the elastic cord A as shown in Fig. And then the connecting cord B located on the left side of the elastic cord A can be woven. That is, the second weaving machine B2, the first weaving machine B1, the elastic cord A, the first weaving machine B1, and the second weaving machine B2 can be successively woven, It may be woven in the opposite direction.

Hereinafter, the weaving operation of the first weaving part B1 and the second weaving part B2 according to the weaving process in the order of the elastic cord A, the first weaving part B1 and the second weaving part B2 is performed. .

5, 8 and 9, the first weaving part B1 of the connecting cord B according to the present embodiment is continuously woven on the elastic cord A, and the second upper fabric U2, 2 lower fabric D2.

As shown in Figs. 8 and 9, the first weaving part B1 is made up of rubber yarns S6 and S12 extending from the elastic cord A between the second upper weave U2 and the second lower weave D2 The rubber yarns S6 and S12 weave the second upper fabric U2 and the second lower fabric D2 as pharmacists. That is, the first weaving section B1 is woven into a double yarn with a second upper fabric U2 and a second lower fabric D2. This allows the rubber warp yarns S6 and S12 to be held by the elastic string A so that the rubber warp yarns S6 and S12 have elasticity before the rubber yarn is exposed to the outside in the second knitting machine portion B2 to be described later. .

Specifically, the second upper fabric U2 is woven with synthetic fibers S1, S4, S7, S10 and weft yarns T, which are first, fourth, seventh and tenth tilts. The second lower fabric D2 is woven with synthetic fibers S2, S5, S8, S11 and weft yarns T, which are the second, fifth, eighth, eleventh inclination.

And the third, ninth and thirteenth examinations S3, S9 and S13 are arranged between the second upper fabric U2 and the second lower fabric D2.

Meanwhile, although not shown in the figure, the first weaving part B1 of the connecting cord B includes the second upper fabric U2, the second lower fabric D2 and the intermediate fabric (not shown) The second upper fabric U2 is woven with synthetic fibers S1, S4, S7, S10 and weft yarns T which are first, fourth, seventh and tenth tapers, The second lower fabric D2 is woven with synthetic fibers S2, S5, S8, S11 and weft yarns T, which are second, fifth, eighth and eleventh slopes, (S6 and S12) which are the sixth and twelfth inclination extended from the string (A), synthetic fibers (S3 and S9) and synthetic fibers (T) which are the third and ninth inclination, The thirteenth examination S13 may be disposed between the second upper fabric U2 and the second lower fabric D2.

5, 10 and 11, the second weaving portion B2 of the connecting cord B according to the present embodiment is continuously woven into the first weaving portion B1 and the third upper weaving fabric U3, And a third lower fabric D3.

As shown in Figs. 10 and 11, the second weaving portion B2 exposes the elastic yarn A and the rubber yarns S6 and S12 extending from the first weaving portion B1 to the outside to form a rubber yarn S6 , S12) are excluded.

Specifically, the third upper fabric U3 is woven with synthetic fibers S1, S4, S7, and S10, which are first, fourth, seventh, and tenth tapers, and a weft yarn T. The third lower fabric D3 is woven with synthetic fibers S2, S5, S8, S11 and weft yarns T, which are the second, fifth, eighth and eleventh slopes.

And the third and ninth examination yarns S3 and S9 are disposed between the third upper fabric U3 and the third lower fabric D3.

The third upper fabric U3 and the third lower fabric D3 are woven into the synthetic fiber S13 which is the thirteenth pharmacist.

The sixth and twelfth rubber yarns S6 and S12 extending from the first weaving unit B1 are exposed to the outside through at least one of the third upper fabric U3 and the third lower fabric D3, do. After the weaving process is completed, the exposed rubber yarns S6 and S12 are cut.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Accordingly, such modifications or variations are intended to fall within the scope of the appended claims.

10: Safety swing 20: Bag
30: Belt strap with elasticity A: Elastic strap
B: Connecting string B1: 1st straightening
B2: 2nd workpiece

Claims (13)

An elastic cord woven with a rubber yarn and a synthetic fiber, the elastic cord being woven including a first upper fabric and a first lower fabric, the rubber yarn repeatedly being woven alternately with the first upper fabric and the first lower fabric to be wrinkled in the longitudinal direction; And
And a connecting cord which is continuously woven on both sides of the elastic cord and is cut out of a rubber yarn which is exposed to the outside,
Wherein the rubber yarn of the elastic cord is disposed between the first upper fabric and the first lower fabric at a predetermined distance as a warp after being laid on the underside of a plurality of continuous weft yarns positioned in the first lower fabric, Repeating a weaving process in which the weft yarn is laid on the upper side of the weft yarn as a warp yarn and is placed on the upper side of a plurality of consecutively arranged weft yarns and arranged between the first upper weft yarn and the first lower weft yarn at a predetermined distance as a judging yarn,
The elastic cord is formed by weaving the first upper fabric with synthetic fibers and weft yarns which are the first, fourth, seventh, and tenth tilts, and second, fifth, eighth, and eleventh The first lower fabric is woven with a yarn-fed yarn and a weft yarn, and the yarn counted as No. 3, No. 9, and No. 13 is disposed between the first upper fabric and the first lower fabric, 6 < / RTI > and 12 < RTI ID = 0.0 >#,< / RTI > alternately weaving the first upper fabric and the first lower fabric repeatedly.
The method according to claim 1,
The connecting cord
A second upper fabric woven in succession to the first upper fabric and a second lower fabric woven in succession to the first lower fabric, and wherein a rubber yarn extending from the elastic cord extends between the second upper fabric and the second upper fabric, 2. A belt cord having elasticity comprising a first weave portion received between lower fabrics.
3. The method of claim 2,
And a rubber yarn extending from the elastic strap, the elastic yarn being woven from the second upper fabric and the second lower fabric as pharmacists.
3. The method of claim 2,
Wherein the first weaving portion includes:
The second upper fabric is woven with the first and fourth yarns, the seventh yarn and the tenth yarn and the synthetic fiber and the weft yarn, and the second upper fabric is woven with the synthetic yarns of the second, fifth, eighth, And weaving the second upper fabric and the second lower fabric with rubber yarn as No. 6 and No. 12 pharmacist yarn extended from the elastic cord, A belt cord having elasticity for arranging the yarn nos. 9 and 13 in between the second upper fabric and the second lower fabric.
3. The method of claim 2,
The connecting cord
A second upper fabric having a third upper fabric woven in succession and a third lower fabric woven in succession with the second lower fabric, And a weft portion.
6. The method of claim 5,
And the second weaving portion comprises:
The third upper fabric is woven with the first and fourth yarns, the seventh yarn and the tenth yarn and the synthetic yarn and the weft yarn, and the third upper fabric is woven with the synthetic yarns of the second, fifth, eighth, And the third lower fabric is woven with a weft yarn synthetic yarn and the third and ninth yarns are arranged between the third upper fabric and the third lower fabric, The third upper fabric and the third lower fabric are woven, and the sixth and twelfth rubber yarns extending from the first weaving portion are wound to the outside through at least one of the third upper fabric and the third lower fabric, A belt strap with elasticity to expose.
The method according to claim 1,
Wherein the width of the elastic straps has a greater elasticity than the width of the connection straps.
8. The method of claim 7,
Wherein the density of the weft yarns on the elastic straps is greater than the density of the weft yarns on the connecting straps.
8. The method of claim 7,
Wherein the width of both ends of the elastic cord is smaller than the width of the middle portion of the elastic cord and decreases gradually so as to have elasticity corresponding to the width of the connection cord.
10. The method of claim 9,
Wherein the density of the weft yarns at both ends of the elastic straps is less than the density of the weft yarns at the middle of the elastic straps and has a resilience that decreases gradually. delete delete delete

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