KR101858392B1 - Safety net - Google Patents

Abstract

The present invention relates to a guard net that increases tensile strength without forming a gap between meshes of the net, and lowers its weight. Four strands of wefts (4a, 4b) are formed by first and second vertical yarns (6, 8) providing weaving nodes (No) of odd rows (Ri) and weaving nodes (Ne) of even rows (Rj). A straight yarn which is not involved at two strands of wefts exists in a loop ring space (S) between the weaving nodes (No) of odd rows (Ri) and the weaving nodes (Ne) of even rows (Rj). The wefts (4a, 4b) arranged in plural rows are arranged in a zigzag pattern in an opposite direction, and are woven by first and second weaving yarns (10, 12). The first and second weaving yarns cross three wefts (4a, 4b) and then are woven. The first weaving yarn and the second weaving yarn are intersected between the nearest wefts (4a, 4b) of the even weaving node (Ne), and then are woven at even weaving nodes (Ne) of the wefts (4a, 4b).

Description

Protection network for building construction {SAFETY NET}

The present invention relates to a net structure, and more particularly, to an improvement of a protection net installed at a construction site for protection against dust, dust and the like, soundproofing and insulation.

In the construction site, workers fall and fall and various tools fall down. In order to protect workers and citizens from this danger, a protection network is installed when building is built.

To be prepared for a safety accident, the strength of the protection net is high so that it can not be torn easily, it is excellent in elasticity, and it can be installed at a place where all safety accidents can occur. Also, the structure of the protection net should be such that there is no break, loosening, distortion, stain, peeling, or distortion.

An example of the implementation of such a protection network is disclosed in Japanese Patent Application Laid-Open No. 10-2011-0080934 entitled " Multiple Structural Safety Net "(Patent Document 1). Patent Document 1 proposes a polypropylene protection net that uses polypropylene yarn material and is made into a double layer to improve the strength and stretchability, and the yarn becomes thicker and more densely twisted, thereby preventing noise and adsorbing fine dust.

Another example of the protection network is disclosed in Japanese Patent Application Laid-Open No. 10-0965159 entitled " Structure of Protective Network for Protective Networks "(Patent Document 2). In Patent Document 2, the upper loop and the lower loop are alternately adjacent to each other while the first loop and the second loop are overlapped with each other at equal intervals, and the upper loop and the lower loop are staggered alternately using the upper knitting yarn, It is disclosed that the ring is adjacent to the upper ring of the second tilt and the lower ring of the first tilt is adjacent to the lower ring of the second tilt. This strengthening of the tissue binding force increases the installation strength and improves the durability We are.

However, in the prior art having the same structure as that of Patent Document 1 or Patent Document 2, it is necessary to have a loop-shaped structure so that the flap can be freely adjusted. Such a loop-shaped structure has frictional heat and twist in the process of forming more than 1,000 rings per minute Repeated bending leads to considerable loss of inherent warp tensile strength.

Due to the ring-shaped structure, the tensile strength loss of the warp causes a loss of 30% at the intrinsic tensile strength and a loss of at most 40%. Such a decrease in the tensile strength ultimately leads to the maintenance of the tensile strength per unit area To make the yarn thickness larger.

This increases the total weight of the protective net, which increases the production cost, and it also has a disadvantage that it is not easy to work because of its weight when the protective net is installed in the field.

Japanese Patent Application Laid-Open No. 10-2011-0080934 entitled " Registered Patent Publication No. 10-0965159 "Structure of Protective Network for Construction &

Accordingly, it is an object of the present invention to provide a protective net for building construction having a structure which is relatively low in production cost and easy in installation work in the field, while maintaining a tensile strength required by a protection net for a building construction without slit or sagging .

The present invention according to the above object is achieved by providing a first and a second longitudinal strand yarn (1, 2, 3, 4, 5, 6, 7, (4a) and (4b) formed of four strands by mutual ring connection using a pair of rings (8) and (8) in the ringing section (S) between the hole- Wherein the warp yarns are present in the form of a straight yarn which is not involved in the ring connection,

The first and second connecting yarns 10 and 12 constitute a first connecting yarn 10 and a second connecting yarn 12 which are arranged in a zigzag manner and connected to each other in a direction opposite to each other between the warp yarns 4a and 4b arranged in a plurality of rows, 10) 12 are overlaid on three rows of warp yarns 4a and 4b,

The warp yarns 4a and the adjacent warp yarns 4b are alternately repeatedly formed and the warp yarns 4a are wound on the left and right sides of the odd numbered warp yarns for the first connecting yarns 10 while alternating between the two vertical yarns 6, With an interlaced node, the neighboring warp 4b is configured such that the two interlaced yarns 6, 8 alternate with each other to have left and right interlacing nodes of even-numbered warp columns for the second connecting yarns 12,

The first connecting yarn 10 and the second connecting yarn 12 are alternately overlapped with each other between the nearest inclined yarns 4a and 4b of the rows of the even yarn joining nodes Ne of the respective warp yarns 4a and 4b (Ne) of the warp yarns 4a and 4b that meet after the warp yarns 4a and 4b are formed. In the odd knotted yarn No. (No) row of the warp yarns 4a and 4b, the nearest warp yarns 4a and 4b, The first and second connecting yarns 10 and 12 are connected to each other at an odd numbered node No of the first connecting yarn 10 and the second connecting yarn 12 separated by one space.

In addition, the present invention is characterized in that the first connecting yarns 10 arranged in a zigzag pattern are arranged parallel to each other, and between the connecting knitting yarns between the left and right first connecting yarns 10, The second connecting yarns 12 arranged in a zigzag shape in the direction opposite to the connecting yarn 10 are arranged in parallel with each other and between the connecting knitting yarns between the left and right second connecting yarns 12, So as to be spaced apart from each other.

The present invention relates to a method and apparatus for maintaining a tensile strength required in a building construction protection net while reducing the weight of a protection net compared to a conventional protection net having the same tensile strength, And the tensile strength is further reinforced without sagging. Since the weight of the protective net is relatively light, there is a merit that the workability in installation in the field is good.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a structural diagram of a protection network for building construction according to an embodiment of the present invention;
2 is a view for explaining a connection structure of a warp yarn and a connecting yarn according to the present invention,
FIG. 3 is a simplified structure diagram of a protection net for a construction work for showing the first and second connection yarn arrangement states as a whole according to an embodiment of the present invention;
FIG. 4 is an enlarged organization view of a portion indicated by a dotted circle "A" in FIG. 1 and FIG. 3 in the protection net for construction work of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the organization structure of the protection net for building construction according to the present invention is shown somewhat loosely for the sake of convenience. However, in reality, the mesh structure is formed so as not to be visible and the thickness of one strand is also formed into a plurality of filament yarns It should be understood.

FIG. 1 is a structural view of a protection net 2 for construction work according to an embodiment of the present invention. FIG. 2 is a perspective view showing the constructional protection net 2 of the present invention in a state in which the warp yarns 4a and 4b and the connecting yarns 10 and 12 In FIG.

2, reference numerals r1, r2, r3, ... denote the row number of the protection network 2 and reference numerals c1, c2, c3, It is a composition of numbers.

2 (a), each of the warp yarns 4a and 4b composed of two longitudinal strands 6 and 8 and the warp yarns 4a and 4b extending beyond the three warp yarns 4a and 4b, The first connecting yarn 10 and the second connecting yarn 10 are arranged in a zigzag manner in the first connecting yarn 10 and the second connecting yarn 10, Fig. FIG. 2C is a view showing the arrangement of the second connecting yarns 12 stitched together.

FIG. 3 is a simplified structure diagram of a protection net 2 for a construction work for showing an arrangement state of first and second connecting yarns 10 and 12 according to an embodiment of the present invention,

FIG. 4 is an enlarged organization diagram of a portion indicated by a dotted circle "A" in FIG. 1 and FIG. 3 in the building construction protection net 2 of the present invention.

The protection net (2) according to the embodiment of the present invention can be applied to protection against fine dust such as fall prevention and dust, soundproofing and insulation, fall prevention, a protection net installed at a construction site for a vertical protection net, (Raschel knitting machine or tricot knitting machine).

The protection net 2 for building construction according to the embodiment of the present invention shown in Fig. 1 is composed of slopes 4a and 4b composed of two longitudinal strands 6 and 8 and two types of strands 4a and 4b, 2 knitting yarn 10 (12).

First, the first and second longitudinal strands 6, 8 are used to form the slopes 4a, 4b of the protection net 2 for construction work, and four strands are formed by alternately forming a loop. In this case, one strand is composed of a number of filament yarns and has a denier fineness of 1000 to 1400 (thickness).

The first and second connecting yarns 10 and 12 that are engaged with the warp yarns 4a and 4b arranged in a plurality of rows cross over three rows of warp yarns 4a and 4b, 4 and 4a (4b). The first and second longitudinal strands 6, 8 are stitched together in a zigzag manner.

The first and second longitudinal strands 6 and 8 and the first and second longitudinal strands 6 and 8 of the warp yarns 4a and 4b used in the protection net 2 of the present invention The first and second connecting yarns 10 and 12, which are zigzagly connected, are used singly or in combination of polypropylene yarns or polyethylene yarns. Among them, polypropylene yarns are most preferable when considering both the tensile strength side and the unit price side or the flame retarding treatment side Do. Polypropylene yarns are somewhat more expensive than polyethylene yarns but have excellent tensile strength, and there is no problem in the flame retarding treatment of yarn.

In forming the first and second longitudinal strands 6 and 8 and the first and second connecting yarns 10 and 12 of the warp yarns 4a and 4b applied to the construction protection net 2, Has a denier of 1000 to 1400 to be suitable for maintaining thickness and tensile strength as a protective net for building construction according to the present invention.

As the prior art, in the case of the inclination referred to in the prior art 2, as in the conventional case, the inclined structure is formed by three-stranded weft yarns which are reciprocally folded in an inclined manner and are continuously arranged by being looped. However, the reciprocal folding of the warp causes the tensile strength to be reduced by 30 to 40% compared to the inherent tensile strength of the warp before the fold.

Therefore, in order to meet the tensile strength required in the safety net room, it is necessary to use more weight of polypropylene or polyethylene yarn, which contributes to increase the cost of the safety net room.

The first and second connecting yarns 10 and 12 are formed so that the warp yarns 4a and 4b can be bent as little as possible by using the two longitudinal yarns 6 and 8, The weight of the thread is lowered while maintaining the required tensile strength of the protection net 2 for building construction, thereby lowering the cost of the protection net 2. At the same time, sufficient thickness of the protection net (2) is secured so that it can prevent fall in the construction site, and it is realized to protect from fine dust such as dust generated in the field, and also to have sound insulation and warmth.

In the embodiment of the present invention, in the protection net 2 for building construction in which the first and second connecting yarns 10 and 12 are formed by weaving the non-adjacent warp yarns 4a and 4b over three inclined columns, Unlike the usual method of folding one longitudinal strand twice in the formation of each of the warp yarns 4a and 4b having strands, two longitudinal strands 6 and 8 are used. Then, the number of strands 4a, 4b is set to four strands by using two longitudinal strands 6, 8. That is, in the present invention, each of the four warp yarns 4a and 4b is constituted by a combination of a ring connection and a straight yarn connection between two longitudinal strands 6 and 8.

The inclined yarn 4a and the neighboring inclined yarn 4b are alternately repeatedly formed and have a similar tissue structure. However, in the embodiment of the present invention, if the first connecting yarns 10 are woven into the inclined yarn 4a, The second connecting yarns 12 are woven together.

In the present invention, for example, the two longitudinal strands 6 and 8 of the warp yarns 4a are alternated with each other to form the warp yarns 4a and 4b for the first connecting yarns 10 It has left and right interlocking nodes. That is, the even-performing interlocking node Ne of the first and second longitudinal strands 6 and 8 and the first and second longitudinal strands 6 and 8 of the first and second longitudinal strands 6 and 8 are inclined 4a ). At this time, if the right bending portion of the first connecting yarn 10 extending in a staggered manner is connected to the even-performing binding thread Ne of the first longitudinal yarn 6 on the warp yarn 4a, And the left bending portion of the other first connecting yarn 10, which extends in a zigzag manner, is engaged in the execution interlocking node No.

The two adjacent vertical warp yarns 6 and 8 are alternated with each other in the adjacent warp yarn 4b immediately adjacent to the warp yarn 4a and have left and right knotting knots for the second connecting yarns 12. That is, the even-performing interlocking node Ne of the first and second longitudinal stranding yarns 6 and 8 and the first and second longitudinal stranding yarns 6 and 8 are connected to each other by the warp yarns 4b ). At this time, if the left bending portion of the second connecting yarn 12 extending in a staggered manner is connected to the even-performing binding knot Ne of the first longitudinal yarn 6 on the slope 4b, And the right bending portion of the other second connecting yarn 12, which extends in a zigzag manner, is engaged.

In the present invention, between the hole-making interlocking node No and the pairing interlocking node Ne of the first and second longitudinal strands 6 and 8 constituting the slopes 4a and 4b, S), and ring rings are formed in the ringing section S by a ring connection between the first longitudinal strands 6 and the second longitudinal strands 8.

The first and second longitudinal strands 6 and 8, which are involved in the formation of the annular ring, are folded one half of the annular section S back and forth one by one, and in the next annular section S By alternately repeating the forms passing in a straight yarn form, two yarns out of the four strands of the first and second longitudinal yarns 6 and 8 in an arbitrary ring-shaped section S form a ring- And the remaining two strands are present in the form of a straight yarn which is not involved in the inter-linkage.

The two strands extending in the straight yarn form extend to each of the two ring segments S as shown in FIG. 4, but are formed to extend while being shifted from each other by one section.

The folding of the first and second longitudinal strands 6, 8 for forming a ring has a tensile strength that is 30 to 40% loss compared to the straight yarn type. In the present invention, the warp yarns 4a, 4b Since there is no loss of strength of the tensile strength in the other two strands except the two strands which are folded as necessary for the formation of the ring, the strength of the tensile strength of the inclinations 4a and 4b per unit weight according to the present invention is not lost, Lt; RTI ID = 0.0 > (S). ≪ / RTI >

Increasing the tensile strength of the warp yarns 4a and 4b per unit weight according to the present invention will be described below in comparison with those described in Patent Document 2 in the prior art.

Based on the same tensile strength required in the building construction protection network (2), the weight of the protection net is calculated in comparison with the conventional technique and the inclined configuration according to the present invention as follows.

In building protection networks, the reference tensile strength per denier is 6.5 g.

As the prior art, in the case of the inclination referred to in the preceding document 2, the inclined structure of the protective net of the prior art is assumed to be a three-stranded type, The thickness of the strand is assumed to be 1000 denier. In addition, it is assumed that there is a tensile strength loss of 30% in this comparative example because there is a reduction in tensile strength of 30% to 40% due to folding of the warp.

The tensile strength of the triple-loop annular inclined structure according to the prior art is calculated to be 3 strands each having a reference tensile strength of 6.5 g per denier and 1000 denier per strand, × 3 strands x 6.5 g = 19.5 kg '. However, since the three strands of the prior art have a tensile strength loss of 30% due to the folding of the longitudinal strands, the loss of tensile strength thereof is 19.5 kg 30% = 5.85 kg. As a result, the tensile strength of the prior art three-ring annular inclined structure is 19.5 kg - 5.85 kg = 13.65 kg.

In contrast, the structure of each of the warp yarns 4a and 4b of the building construction protection net 2 of the present invention is composed of four strands, two strands folded as necessary for forming a loop and two strands of the remaining straight yarn .

In the case of two straight strands in the four strands of the first and second longitudinal strands 6 (8) of the warp yarns 4a and 4b of the present invention, '1000 denier x 2 strands x 6.5g = 13kg' And has a tensile strength. In the case of the other two folded strands of the first and second longitudinal strands 6, 8 of the warp yarns 4a, 4b, "1000 denier x 2 strand x 6.5g = 13kg" Since the loss of strength is 13 kg × 30% = 3.9 kg, the tensile strength of the two strands necessary for the ring formation is 13 kg - 3.9 kg = 9.3 kg. Therefore, the tensile strength of each of the four strands 4a and 4b of the present invention becomes " 13kg + 9.3kg = 22.1kg ".

However, since the structure of each of the warp yarns 4a and 4b of the present invention is 4000 denier with four strands and the warp structure of the prior art has three strands of bar 3000 denier, the oblique structure of the present invention is the same as that of the prior art warp In terms of denier, 'x (tensile strength) = 16.575 kg' is obtained through the relationship of '4000 denier: 22.1 kg (tensile strength) = 3000 denier: x (tensile strength)'.

When the oblique structure of the prior art is compared with the oblique structure of the present invention at the same denier level, the tensile strength of the oblique structure of the prior art is " 13.65 kg ", and the tensile strength of the oblique structure of the present invention is " 16.575 kg & .

Since the reference tensile strength required in the protective net is determined in advance, the total denier value due to the inclined structure of the present invention, that is, the weight of the protective net according to the present invention, is set to the total denier value of the prior art, Which is a relatively low value. This is because 1 denier is defined as the weight of the yarn of 9000 m, so the total denier value can be regarded as the weight value.

Based on the same tensile strength required for the building construction protection network, the safety net 2 of the present invention has 15 to 20% less weight than the prior art, and since the price of the thread in the knitted fabric is 15, By 20% less, it means that the production cost of the protective net of the present invention is 15% lower than the production cost of the prior art protection net. The construction protection net 2 of the present invention has a relatively small weight of 15 to 20% less than that of the existing protection net, which is advantageous in that it is easy to work on installation of the protection net in the field.

Meanwhile, in the present invention, the connecting yarns are composed of two kinds of connecting yarns 10 and 12, each of which has three rows of inclined yarns 4a and 4b of the above-described structure, And connects the slopes 4a and 4b arranged in a plurality of rows.

More specifically, the first connecting yarn 10 and the second connecting yarn 12 are arranged in a zigzag fashion in the mutually opposite directions between the warp yarns 4a and 4b arranged in a plurality of rows.

At this time, the first and second connecting yarns 10 and 12 are connected with the warp yarns 4a and 4b, which meet after rubbing the three warp yarns 4a and 4b.

The inclination 4a and the inclination 4b are alternately arranged. For the sake of understanding of the present invention, the inclination "4a" and the inclination "4b "Quot; 2, the inclination 4a becomes an odd inclined column c1, c3, ... and the neighboring inclination 4b becomes an even inclined column c0, c2, c4, ... .

In the present invention, since the first and second connecting yarns 10 and 12 are tied to the inclined yarns after rubbing the three inclined yarns, the first connecting yarns 10 arranged in zigzag form, as shown in FIG. 2, The second connecting yarn 12 arranged in a staggered manner is formed so that the right and left binding ends become even-numbered oblique rows as shown in FIG. 2 (see FIG. 2) (For example, c2 and c6 in Fig. 2 (b)).

In the present invention, when the first and second connecting yarns 10 and 12 are tilted after joining three oblique rows and joined together, the first and second connecting yarns 10 and 12 are divided into three inclined columns , The knitting machine which is operated by knitting becomes crowded and the production cost of the knitting increases. In addition, if the warp yarns 4a and 4b passing over the first and second connecting yarns 10 and 12 are longer than four, the tensile strength of the protection net 2 is lowered.

At this time, the first connecting yarn 10 and the second connecting yarn 12 are overlapped with each other between the adjacent slopes 4a and 4b of the rows of even-numbered loops Ne of the warp yarns 4a and 4b (Ne) of the warp threads (4a) and (4b) that meet after the warp yarns (4a) and (4b).

In the row of the odd-numbered knitting (No) rows of the warp yarns 4a and 4b, the first and second connecting yarns 10 and 12 are fastened to the odd-numbered knitting yarn No. of the nearest warp yarns 4a and 4b, And to be connected to each other in a space separated from each other.

The first connecting yarns 10 arranged in a zigzag pattern are arranged parallel to each other and the two connecting yarns 10 adjacent to each other are spaced apart from each other by two rows of right and left tilted columns, The second connecting yarns 12 arranged in a zigzag form opposite to the first connecting yarns 10 are arranged parallel to each other and the second connecting yarns 12 adjacent to the right and left sides are spaced apart from each other by two rows do.

Particularly, in the present invention, two types of inclination or inclination 4a and neighboring inclination 4b for alternating with the first and second connecting yarns 10 and 12 are alternately repeatedly formed, And the adjacent warp yarns 4b have two vertical threads c1, c3, ... for the first connecting yarns 10 while the yarns 6, 8 are alternated with each other, The first and second yarns 6 and 8 are alternately arranged so as to have left and right loops of even-numbered inclined columns c0, c2, c4, ... for the second connecting yarns 12.

The first and second connecting yarns 10 and 12 of the zigzag shape opposite to each other in the left and right direction are interlocked with the warp yarns 4a and 4b of the connecting yarns 10 and 12, 4b of the first connecting yarn 10 and the second connecting yarn 12 in the zigzag shape which are opposed to each other in the left and right direction and have a small lozenge loop shape by the second connecting yarns 10, (12a, 12b, 12c, 12d, 12d, 12d, 12d, 12d, 12d, 12d, 12d, 12d, 12d) The first and second connecting yarns 10 and 12 are arranged between the two warp yarns 4b and 4a which are separated from each other by 7 in the left and right direction by the arrangement of the first and second connecting yarns 10 and 12 in the zigzag shape, (10) and (12), and the large lozenge loop structure has a small lozenge loop shape and a medium lozenge loop shape overlapping the inner loops . In the large lozenge loop structure, one medium lozenge loop structure and four small lozenge loop structures are included, and the medium lozenge loop structure includes two small lozenge loops.
Such a small-scale, medium-scale and large-scale diamond-like overlapping structure greatly enhances the lateral strength of the building construction protective net 2 of the present invention compared to a zigzag structure.

Further, when the protection net 2 for building construction is pulled to the left and right, the gap between the mesh holes 10 and 12 which are opposite to each other is further tightened so that there is almost no gap between the mesh holes and there is no sagging of the mesh, Has the advantage of being further reinforced.

Although the embodiment of the present invention has been described in connection with the exemplary embodiments of the present invention, it is to be understood that the present invention is not limited to the exemplary embodiments described above, but includes a safety net, a horizontal protection net, a vertical net, have. Therefore, the scope of the present invention should not be limited by the described embodiments, but should be determined by the scope of claims and equivalents thereof.

The present invention can be used for a protection network, a vertical protection network, a vertical fall prevention network, a horizontal protection network, and the like.

(2) - Protection net (4a) (4b) - Slope
(6) (8) - First and second longitudinal strands (10) and (12) - First and second connecting yarns
(S) - Ring ring section (No) - Hall performance loop
(Ne) - Pairwise interposition node

Claims (2)

The first and second longitudinal strands 6 and 8, which together provide the hole operation (Ri, i is an odd number) interleaving node No and the even operation (Rj, j is an even number) interleaving node Ne, (4a) and (4b) formed of four strands in a ring connection. In the ringing section (S) between the hole-making loop node (No) and the pairing loop node (Ne), two warp- In the protection net constituted so as to exist in the form of a straight yarn involved,
The first and second connecting yarns 10 and 12 constitute a first connecting yarn 10 and a second connecting yarn 12 which are arranged in a zigzag manner and connected to each other in a direction opposite to each other between the warp yarns 4a and 4b arranged in a plurality of rows, 10) 12 are overlaid on three rows of warp yarns 4a and 4b,
The warp yarns 4a and the adjacent warp yarns 4b are alternately repeatedly formed and the warp yarns 4a are wound on the left and right sides of the odd numbered warp yarns for the first connecting yarns 10 while alternating between the two vertical yarns 6, With an interlaced node, the neighboring warp 4b is configured such that the two interlaced yarns 6, 8 alternate with each other to have left and right interlacing nodes of even-numbered warp columns for the second connecting yarns 12,
The first connecting yarn 10 and the second connecting yarn 12 are alternately overlapped with each other between the nearest inclined yarns 4a and 4b of the rows of the even yarn joining nodes Ne of the respective warp yarns 4a and 4b (Ne) of the warp yarns 4a and 4b that meet after the warp yarns 4a and 4b are formed. In the odd knotted yarn No. (No) row of the warp yarns 4a and 4b, the nearest warp yarns 4a and 4b, The first and second connecting yarns 10 and 12 are connected to each other at an odd numbered node No of the first connecting yarn 10 and the second connecting yarn 10,
The first and second connecting yarns 10 and 12 are arranged in a zigzag shape so as to be opposed to each other in the left-to-right direction. The first and second connecting yarns 10 and 12, The warp yarns 4a and 4b of the first and second connecting yarns 10 and 12 having a small lozenge loop shape formed by the second connecting yarns 10 and 12 and opposite to each other in the left and right direction, The first connecting yarns 10 and the second connecting yarns 12 are arranged in a zigzag form having a meshed lozenge loop shape and are mutually opposed to each other in the lateral direction between the two inclined yarns 4b, The first and second connecting yarns 4a and 4b are arranged between the two inclined yarns 4b and 4a which are separated from each other by 7 in the left and right direction by the arrangement of the first connecting yarn 10 and the second connecting yarn 10 with the warp yarns 4a and 4b 10) a large lozenge looping configuration by (12) is superimposed, and the large lozenge looping configuration includes one medium lozenge loop structure and four small lozenge loop loops Including the shape and construction for building protective net, it characterized in that the configuration will be contained the two small diamond-shaped yeokim is the medium-sized diamond-shaped structure yeokim. delete

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