Lattice like russel net and manufacturing method thereof

Abstract

To provide a lattice-like russel net excellent in strength in vertical and horizontal directions, and also to provide a manufacturing method thereof.SOLUTION: The invention is a lattice-like russel net 10 in which a plurality of vertical fiber filament bodies 1 disposed at a certain interval and a plurality of horizontal fiber filament bodies 2 disposed at a certain interval are aligned into a lattice shape. The vertical fiber filament body 1 is a chain stitch texture having vertical fiber loops 1a continuing in a vertical direction. The horizontal fiber filament body 2 is a chain stitch texture having horizontal fiber loops 2a continuing in a horizontal direction on the lattice-like russel net 10.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a lattice-like lath net excellent in strength in the vertical and horizontal directions and usable for various applications, and a method for manufacturing the same.

Background Art

[0002] Nets are used in all applications. For example, a fiber net is known that is stretched between support members such as columns or ropes, disposed between the support members, and includes a fine portion formed with fine meshes and a coarse portion formed with meshes coarser than those of the fine portion and disposed at at least one end of the fine portion for inserting the support member (see, for example, Patent Document 1). It is described that such a fiber net is used for applications such as a safety net, a fishing net, and a ball-catching net for receiving small balls such as ping-pong balls and golf balls.

[0003] Also, as shown in FIG. 6, a net formed by twisting yarns so that the voids are rhombic is commercially available.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Disclosure of the Invention

Problems to be Solved by the Invention

[0005] The nets described in Patent Document 1 and the net shown in FIG. 6 have a habit that the rhombic eyes become lattice-like only when stress is applied in the vertical and horizontal directions. However, since the yarns of these nets are formed in an oblique direction and the crossing portions are X-shaped, when tension is applied, the strength in the vertical and horizontal directions becomes insufficient.

[0006] The present invention has been made in view of the above circumstances, and an object thereof is to provide a lattice-like Russell net excellent in strength in the vertical and horizontal directions (vertical direction and horizontal direction) and a method for manufacturing the same.

Means for Solving the Problems

[0007] The inventors of the present invention earnestly studied to solve the above problems, and as a result, found that the above problems can be solved by making both the vertically arranged fiber linear bodies and the horizontally arranged fiber linear bodies composed of a chain stitch structure having continuous fiber loops, and thus completed the present invention.

[0008] The present invention is a lattice-like Russell net in which a plurality of vertically arranged fiber linear bodies arranged at regular intervals and a plurality of horizontally arranged fiber linear bodies arranged at regular intervals are arranged in a lattice pattern, wherein the vertically arranged fiber linear bodies are a chain stitch structure having vertically continuous vertical fiber loops, and the horizontally arranged fiber linear bodies are a chain stitch structure having horizontally continuous horizontal fiber loops. Further, in the lattice-like Russell net of the present invention, it is preferable that the chain stitch structure is knitted by a Russell stitch.

[0009] In the lattice-like Russell net of the present invention, the vertically arranged fiber linear bodies have a vertical connection loop portion for connecting with the horizontally arranged fiber linear bodies between the continuously arranged vertical fiber loops, and the horizontally arranged fiber linear bodies have a horizontal connection loop for connecting with the vertically arranged fiber linear bodies between the continuously arranged horizontal fiber loops, and at the intersection where the vertically arranged fiber linear bodies and the horizontally arranged fiber linear bodies intersect, it is preferable that the vertical connection loop portion and the horizontal connection loop portion are engaged. More specifically, it is preferable that the vertical connection loop portion is composed of two loops of a continuously arranged upper vertical connection loop and a lower vertical connection loop, the horizontal connection loop portion is one loop having a first thread portion and a second thread portion, the upper vertical connection loop is engaged with the first thread portion, and the lower vertical connection loop is engaged with the second thread portion.

[0010] The lattice-shaped Russell net of the present invention is composed of yarns constituting the vertical fiber stripes and / or yarns constituting the horizontal fiber stripes, which are heat-fusible synthetic fibers, and it is preferable that the heat-fusible synthetic fibers are hardened by heat treatment.

[0011] The lattice-shaped Russell net of the present invention is preferably used as a fishing net.

[0012] The present invention is a method for manufacturing a lattice-shaped Russell net, which includes a first step of previously knitting a horizontal fiber stripe by Russell knitting, a second step of knitting a vertical fiber stripe by Russell knitting, and a third step of knitting a vertical fiber stripe by Russell knitting and inserting the horizontal fiber stripe horizontally at regular intervals.

[0013] The present invention is a method for manufacturing a lattice-shaped Russell net, which includes a first step of previously knitting a horizontal fiber stripe by Russell knitting, a second step of knitting a vertical fiber stripe by Russell knitting, a third step of knitting a vertical fiber stripe by Russell knitting and inserting the horizontal fiber stripe horizontally at regular intervals, and a fourth step of performing heat treatment to harden the heat-fusible synthetic fiber.

Advantages of the Invention

[0014] Since the lattice-shaped Russell net of the present invention arranges the vertical fiber stripes and the horizontal fiber stripes in a lattice shape, there is no need to expand and apply excessive stress in the vertical and horizontal directions in order to deliberately change the diamond pattern into a lattice shape. Also, since the vertical fiber stripes and the horizontal fiber stripes are arranged in a lattice shape, it has excellent strength in the vertical and horizontal directions.

[0015] The lattice-shaped Russell net of the present invention has vertical fiber loops where the vertical fiber stripes are continuous and horizontal fiber loops where the horizontal fiber stripes are continuous, and both are chain stitch tissues. Therefore, it has flexibility and is laid across the entire width in the vertical and horizontal directions, so it can exhibit more sufficient strength. In addition, in the lattice-shaped Raschel net, by making the chain stitch structure be formed by Raschel knitting, the fiber density becomes denser, so while maintaining a certain flexibility, it becomes even more excellent in strength.

[0016] In addition, in the lattice-shaped Raschel net, since it is lattice-shaped, there is no limit to the vertical length, and the maximum width in the horizontal direction can be about 15 m, and it can be made into a suitable size. Incidentally, since the net with rhombus-shaped voids is formed obliquely, the vertical and horizontal lengths when extended in a lattice shape are limited. Therefore, it is particularly difficult to make it wide and long. In addition, since the obtained lattice-shaped Raschel net is lattice-shaped, unlike the rhombus-shaped net, for example, it is possible to provide ears at the edge portions by simultaneous knitting.

[0017] In the lattice-shaped Raschel net of the present invention, by engaging the vertical connecting loop portion and the horizontal connecting loop portion at the intersection, it is possible to extremely strengthen the connection between the vertical fiber strip and the horizontal fiber strip at the intersection. Also, at this time, by engaging the upper vertical connecting loop with the first yarn portion and the lower vertical connecting loop with the second yarn portion, a stronger knot is formed, and it is possible to surely prevent the vertical fiber strip from shifting in the vertical or horizontal direction with respect to the horizontal yarn strip fiber body. Also, in this case, it also has the advantage that the knots of the knots do not clearly protrude.

[0018] In the lattice-shaped Raschel net of the present invention, by making the yarn constituting the vertical fiber strip and / or the yarn constituting the horizontal fiber strip be made of a heat-sealable synthetic fiber yarn, the heat-sealable synthetic fiber yarn can be cured according to the application. Thereby, it can be made such that both the vertical fiber strip and the horizontal fiber strip are cured, or such that either the vertical fiber strip or the horizontal fiber strip is cured.

[0019] As described above, the lattice-shaped Russell net of the present invention is lattice-shaped and has sufficient strength in the vertical and horizontal directions. Therefore, it can be suitably used as a fishing net with a large area and high strength.

[0020] The manufacturing method of the lattice-shaped Russell net of the present invention can be easily realized by using a so-called Russell knitting machine in the first step, the second step, and the third step. Also, the first step, the second step, and the third step are common in that they are knitted by Russell knitting. In the third step, an operation of inserting a horizontal fiber strip into the second step may be added. Therefore, according to the manufacturing method of the lattice-shaped Russell net, it is possible to manufacture the lattice-shaped Russell net at low cost and relatively easily. In addition, by having a fourth step, the above-described thermoplastic fiber can be cured.

Brief Description of the Drawings

[0021]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Best Mode for Carrying Out the Invention

[0022] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings as necessary. In the drawings, the same elements will be denoted by the same reference numerals, and redundant descriptions will be omitted. Also, the positional relationships such as up, down, left, and right are based on the positional relationships shown in the drawings unless otherwise specified. Furthermore, the dimensional ratios in the drawings are not limited to the illustrated ratios.

[0023] FIG. 1 is a schematic plan view schematically showing a lattice-shaped lath net according to the present embodiment. As shown in FIG. 1, the lattice-shaped lath net 10 according to the present embodiment includes a plurality of vertical fiber strips 1 arranged horizontally at regular intervals and a plurality of horizontal fiber strips 2 arranged vertically at regular intervals. That is, in the lattice-shaped lath net 10, the vertical fiber strips 1 and the horizontal fiber strips 2 are provided across the entire width and are arranged in a lattice shape so as to be orthogonal to each other. Examples of the lattice include a square or a rectangle.

[0024] Here, the vertical fiber strip 1 is a fiber-made strip extending vertically, and the horizontal fiber strip 2 is a fiber-made strip extending horizontally. Also, the fixed interval between the vertical fiber strips 1 is preferably, for example, 1 to 10 cm, and the fixed interval between the horizontal fiber strips 2 is preferably, for example, 1 to 10 cm. Furthermore, it is more preferable that both intervals are the same (the lattice is square).

[0025] In the lattice-shaped lath net 10, the vertical fiber strips 1 and the horizontal fiber strips 2 are made of fiber as the material. Therefore, the lattice-shaped lath net 10 is excellent in flexibility and can be bent or wound into a roll shape. Incidentally, as will be described later, when the materials of the vertical fiber strip 1 and the horizontal fiber strip 2 are heat-fusible synthetic fibers, the lattice-like Raschel net 10 before heat treatment is excellent in flexibility.

[0026] Therefore, the lattice-like Raschel net 10 can be adopted for all applications as an alternative to conventional nets (nets) such as safety nets, anti-animal nets, anti-bird nets, agricultural nets, livestock nets, fishing nets, anti-shark nets, etc. Among these, the lattice-like Raschel net 10 is lattice-like and excellent in strength in the vertical and horizontal directions, so it can be suitably adopted as a fishing net with a large area and a certain required strength.

[0027] In the lattice-like Raschel net 10, the yarns constituting the vertical fiber strip 1 and the horizontal fiber strip 2 are not particularly limited, but natural fibers such as cotton, hemp, linen, wool, cashmere, silk, jute, etc., polyester fibers, polyamide fibers, polyurethane fibers, polyacrylonitrile fibers, polyvinyl alcohol fibers, polyvinyl chloride fibers, polypropylene fibers, polyethylene fibers, polystyrene fibers, etc. synthetic fibers, or blended fibers obtained by blending different types of these fibers, etc. may be mentioned. The yarn constituting the vertical fiber strip 1 and the yarn constituting the horizontal fiber strip 2 may be of the same type or different types. Incidentally, the yarns constituting the vertical fiber strip 1 and the horizontal fiber strip 2 can be selected according to the application. Among these, from the viewpoints of strength, durability, and versatility, the yarns constituting the vertical fiber strip 1 and the horizontal fiber strip 2 are preferably synthetic fibers.

[0028] Also, it is possible to adopt heat-fusible synthetic fibers as such synthetic fibers. That is, heat-fusible synthetic fibers can be adopted as the yarns constituting the vertical fiber strip 1 and / or the yarns constituting the horizontal fiber strip 2. In this case, the heat-fusible synthetic fibers can be cured by heat treatment. In addition, when it is desired to use as an alternative to a conventional wire mesh, heat-sealable synthetic fibers may be employed for both the longitudinal fiber strands 1 and the transverse fiber strands 2 and cured. When it is desired to have an intermediate strength between the wire mesh and the fibers, or when it is desired to wind it up for storage or transportation, for example, heat-sealable synthetic fibers may be employed for one of the longitudinal fiber strands 1 and the transverse fiber strands 2, and synthetic fibers other than heat-sealable synthetic fibers may be employed for the other, and only the heat-sealable synthetic fibers may be cured.

[0029] Here, examples of the heat-sealable synthetic fibers include yarns (filaments) made of thermoplastic fibers such as polyester fibers, polyamide fibers (nylon), polyethylene fibers, and polypropylene fibers. Among these, it is more preferable to employ polyester fibers, which are excellent in versatility and strength, and it is even more preferable to employ polyester fibers having a core-sheath structure in which a high-melting-point polyester is disposed in the core part and a low-melting-point polyester is disposed in the sheath part (for example, trade name: Melset (registered trademark)).

[0030] The longitudinal fiber strands 1 and / or the transverse fiber strands 2 are formed by chain knitting using multifilament yarns (bundles of yarns). Note that the multifilament yarns of thermoplastic fibers are deformable before heat treatment, but by applying heat treatment, the multifilaments fuse and integrate with each other, so that they are cured in the shape at the time of heat treatment.

[0031] In the lattice-like Russel net 10, the fineness of the multifilament yarns constituting the longitudinal fiber strands 1 and the transverse fiber strands 2 is preferably 50 to 80,000 dtex. Thereby, it has more sufficient strength. Note that such yarns may be raw yarns or processed yarns.

[0032] Fig. 2(a) is a schematic plan view showing an enlarged part of the lattice-like Russel net shown in Fig. 1, and Fig. 2(b) is a schematic plan view showing the transverse fiber strands of the lattice-like Russel net shown in Fig. 2(a). As shown in Fig. 2(a), in the lattice-shaped raschel net 10, both the vertical fiber strips 1 and the horizontal fiber strips 2 are chain stitch tissues knitted so that the loops are continuous. Note that both the vertical fiber strips 1 and the horizontal fiber strips 2 are knitted by raschel knitting using a raschel knitting machine. And the vertical fiber strips 1 and the horizontal fiber strips 2 are connected at the intersection 3 where they cross each other.

[0033] Since the lattice-shaped raschel net 10 is a chain stitch tissue, it has flexibility and can exhibit sufficient strength. In addition, since the lattice-shaped raschel net 10 is knitted by raschel knitting, the fiber density becomes denser, and while maintaining a certain degree of flexibility, it has better strength.

[0034] As shown in Fig. 2(b), the horizontal fiber strip 2 has loops made of fibers that are continuous in the horizontal direction (hereinafter also referred to as "horizontal fiber loops") 2a, and loops for connecting (hereinafter also referred to as "horizontal connecting loops") 2b provided between adjacent horizontal fiber loops 2a. That is, the horizontal fiber strip 2 has a configuration in which the horizontal connecting loops 2b are formed at regular intervals in the continuous horizontal fiber loops 2a.

[0035] In the horizontal fiber strip 2, the horizontal fiber loops 2a form a continuous group of horizontal fiber loops. The number of horizontal fiber loops 2a in one group of horizontal fiber loops sandwiched between the horizontal connecting loops 2b is preferably 3 to 30 from the viewpoints of weight reduction and strength balance. The length A1 in the length direction of the horizontal fiber loop 2a is preferably 1 to 20 mm. Note that the length A1 in the longitudinal direction of the horizontal fiber loop 2a is the length A1 from the intersection with one side horizontal fiber loop 2a to the intersection with the other side horizontal fiber loop 2a among the adjacent horizontal fiber loops 2a on both sides. Also, the width A2 of the horizontal fiber loop 2a is preferably 1 to 20 mm.

[0036] In the horizontal fiber strip 2, the horizontal connecting loop 2b is a loop for connecting to the vertical fiber strip 1. Incidentally, the length and width of the horizontal connecting loop 2b are the same as the length A1 and width A2 of the horizontal fiber loop 2a.

[0037] The horizontal connecting loop 2b is a single loop having a first thread portion 2b1 on one side and a second thread portion 2b2 on the other side. That is, the horizontal connecting loop 2b forms a loop shape by the first thread portion 2b1 taking the upper semi-circular arc portion and the second thread portion 2b2 taking the lower semi-circular arc portion. Incidentally, since the first thread portion 2b1 and the second thread portion 2b2 are knitted in a raschel knit, they are the same thread.

[0038] Returning to Fig. 2(a), the vertical fiber strip 1 has a loop (hereinafter also referred to as a "vertical fiber loop") 1a composed of fibers continuous in the vertical direction, and a loop portion (hereinafter referred to as a "vertical connecting loop portion") 1b provided between the continuous vertical fiber loops 1a for connection. That is, the vertical yarn strip fiber body 1 has a configuration in which the vertical connecting loop portions 1b are inserted at regular intervals in the continuous vertical fiber loops 1a.

[0039] In the vertical fiber strip 1, the vertical fiber loops 1a form a continuous group of vertical fiber loops. The number of vertical fiber loops 1a in one group of vertical fiber loops sandwiched by the vertical connecting loop portions 1b is preferably 3 to 30 from the viewpoints of weight reduction and strength balance. Also, the number of vertical fiber loops 1a in the group of vertical fiber loops is preferably the same as the number of horizontal fiber loops 2a in the group of horizontal fiber loops. Incidentally, the length and width of the vertical fiber loop 1a are the same as the length A1 and width A2 of the horizontal fiber loop 2a.

[0040] In the vertical fiber strip 1, the vertical connecting loop portion 1b is a part for connecting to the horizontal fiber strip 2. Note that the length and width of the vertical connection loop 1b are the same as the length A1 and width A2 of the horizontal fiber loop 2a.

[0041] The vertical connection loop portion 1b is composed of two loops, namely, the continuous upper vertical connection loop 1b1 on the upper side and the lower vertical connection loop 1b2 located directly below the upper vertical connection loop 1b1. Note that the single loop constituting the vertical fiber loop 1a, the upper vertical connection loop 1b1, and the lower vertical connection loop 1b2 are all loops with the same structure.

[0042] In the lattice-like Raschel net 10, at the intersection 3 where the vertical fiber strip body 1 and the horizontal fiber strip body 2 intersect, the horizontal connection loop 2b of the horizontal fiber strip body 2 and the vertical connection loop portion 1b of the vertical fiber strip body 1 are connected. Specifically, the upper vertical connection loop 1b1 of the vertical connection loop portion 1b is engaged with the first thread portion 2b1 of the horizontal connection loop 2b, and the lower vertical connection loop 1b2 of the vertical connection loop portion 1b is engaged with the second thread portion 2b2 of the horizontal connection loop 2b. Thereby, the connection between the vertical fiber strip body 1 and the horizontal fiber strip body 2 at the intersection 3 becomes strong, and the vertical fiber strip body 1 does not shift in the vertical or horizontal direction with respect to the horizontal yarn strip fiber body 2 at all.

[0043] As described above, the lattice-like Raschel net 10 can be manufactured using a Raschel knitting machine. Fig. 3(a) is an organizational diagram of the intersection in the manufacturing method of the lattice-like Raschel net according to the present embodiment, and Fig. 3(b) is a knitting pattern diagram of the intersection in the manufacturing method of the lattice-like Raschel net according to the present embodiment. The lattice-like Raschel net 10 is knitted based on the organizational diagram shown in Fig. 3(a). Also, the lattice-like Raschel net 10 is knitted so as to have the knitting pattern shown in Fig. 3(b).

[0044] Fig. 4 is a flowchart showing the manufacturing method of the lattice-like Raschel net according to the present embodiment. As shown in FIG. 4, the manufacturing method of the lattice-shaped Raschel net 10 according to the present embodiment includes a first step S1 of knitting the horizontal fiber strip 2 by Raschel knitting, a second step S2 of knitting the vertical fiber strip 1 by Raschel knitting, a second step S2 of knitting the second yarn in the vertical direction by Raschel knitting and inserting the horizontal fiber strip 2 horizontally at regular intervals, a third step of knitting the vertical fiber strip 1 by Raschel knitting and inserting the horizontal fiber strip 2 horizontally at regular intervals, and a fourth step S4 of performing heat treatment to cure the heat-fusible synthetic fiber yarn as needed.

[0045] In the manufacturing method of the lattice-shaped Raschel net 10, the first step S1, the second step S2, and the third step S3 are performed using a Raschel knitting machine. Further, the fourth step S4 is performed when the above-described heat-fusible synthetic fiber yarn is used as the yarn for knitting. Also, in the first step S1 and the second step S2, the vertical fiber strip 1 and the horizontal fiber strip 2 are similarly knitted by Raschel knitting and manufactured. Note that in the first step S1 and the second step S2, so-called inserting yarns are not used.

[0046] In the third step S3, the vertical fiber strip 1 is knitted by Raschel knitting. At this time, the horizontal fiber strip 2 is used as the so-called inserting yarn. Specifically, in the third step. The horizontal connection loops 2b of the horizontal fiber strip 2 that are periodically inserted are knitted so as to engage with the vertical connection loop portions 1b during the knitting of the vertical fiber strip 1, and the intersection portions 3 are formed. That is, the third step S3 is performed continuously with the second step S2. Thereby, a lattice-shaped Raschel net 10 in which the strips are laid linearly in the entire width in the vertical and horizontal directions (that is, the entire width in the vertical direction and the entire width in the horizontal direction of the lattice-shaped Raschel net) is obtained.

[0047] The fourth step S4 is performed when using heat-sealable synthetic fiber yarn as the yarn used for knitting as described above. Such heating may be performed at a temperature at which at least a part of the heat-sealable synthetic fiber yarn melts, using a general heating device. Thereafter, cooling is performed by air cooling or the like. Since the lattice-like Raschel net 10 is hardened in the shape during heating, it is preferable to perform heating after setting it in a desired shape in advance.

[0048] FIG. 5 is a photograph showing the lattice-like Raschel net manufactured by the manufacturing method of the lattice-like Raschel net according to the present embodiment. As shown in FIG. 5, in the manufacturing method of the lattice-like Raschel net 10, by having the first step S1, the second step S2, and the third step S3, the lattice-like Raschel net 10 can be manufactured inexpensively and relatively easily. In addition, by having the fourth step S4, it is also possible to harden the lattice-like Raschel net 10.

[0049] As described above, the preferred embodiments of the present invention have been described, but the present invention is not limited to the above embodiments.

[0050] In the lattice-like Raschel net 10 according to the present embodiment, it is not always necessary to employ heat-sealable synthetic fiber yarn.

[0051] In the lattice-like Raschel net 10 according to the present embodiment, ears (selvages) may be provided at the edge portions. Such ears may be formed simultaneously during knitting by Raschel knitting, or may be formed by separately sewing.

[0052] In the manufacturing method of the lattice-like Raschel net 10 according to the present embodiment, it has the first step S1, the second step S2, the third step S3, and the fourth step S4, but it is not necessary to have the fourth step S4.

Industrial Applicability

[0053] The lattice-like Russell net according to the present invention can be used as a net. The lattice-like Russell net according to the present invention has high strength in the vertical and horizontal directions, can be used as a substitute for conventional nets, and is particularly suitable for use as a fishing net.

Explanation of Signs

[0054] 1 ··· Vertical fiber strip 10 ··· Lattice-like Russell net 1a ··· Fiber loop (vertical fiber loop) 1b ··· Vertical connecting loop part 1b1 ··· Upper vertical connecting loop 1b2 ··· Lower vertical connecting loop 2 ··· Horizontal fiber strip 2a ··· Fiber loop (horizontal fiber loop) 2b ··· Horizontal connecting loop 2b1 ··· First thread part 2b2 ··· Second thread part 3 ··· Crossing part S1 ··· First step S2 ··· Second step S3 ··· Third step S4 ··· Fourth step

Claims

1. A lattice-like Russell net in which a plurality of vertical fiber strands arranged at regular intervals and a plurality of horizontal fiber strands arranged at regular intervals are arranged in a lattice pattern, wherein the vertical fiber strands are a chain stitch structure having vertical fiber loops continuous in the vertical direction, and the horizontal fiber strands are a chain stitch structure having horizontal fiber loops continuous in the horizontal direction.

2. The lattice-like Russell net according to claim 1, wherein the chain stitch structure is knitted by a Russell stitch.

3. The vertical fiber strands have a vertical connection loop portion for connecting to the horizontal fiber strands between the continuous vertical fiber loops, the horizontal fiber strands have a horizontal connection loop for connecting to the vertical fiber strands between the continuous horizontal fiber loops, and at the intersection where the vertical fiber strands and the horizontal fiber strands intersect, the vertical connection loop portion and the horizontal connection loop portion are engaged with each other. The lattice-like Russell net according to claim 1.

4. The vertical connection loop portion is composed of two loops of a continuous upper vertical connection loop and a lower vertical connection loop, the horizontal connection loop portion is one loop having a first thread portion and a second thread portion, the upper vertical connection loop is engaged with the first thread portion, and the lower vertical connection loop is engaged with the second thread portion. The lattice-like Russell net according to claim 3.

5. The thread constituting the vertical fiber strands and / or the thread constituting the horizontal fiber strands is made of a heat-fusible synthetic fiber thread, and the heat-fusible synthetic fiber thread is cured by heat treatment. The lattice-like Russell net according to claim 1.

6. The lattice-like Russell net according to any one of claims 1 to 5, which is used as a fishing net.

7. The manufacturing method of the lattice - like Raschel net according to claim 3 or 4, A first step of previously knitting the horizontal fiber strip by Raschel knitting; A second step of knitting the vertical fiber strip by Raschel knitting; A third step of knitting the vertical fiber strip by Raschel knitting and inserting the horizontal fiber strip horizontally at regular intervals; The manufacturing method of the lattice - like Raschel net having the above steps.

8. The manufacturing method of the lattice - like Raschel net according to claim 5, A first step of previously knitting the horizontal fiber strip by Raschel knitting; A second step of knitting the vertical fiber strip by Raschel knitting; A third step of knitting the vertical fiber strip by Raschel knitting and inserting the horizontal fiber strip horizontally at regular intervals; A fourth step of performing heat treatment to cure the heat - fusible synthetic fiber yarn; The manufacturing method of the lattice - like Raschel net having the above steps.

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