Raschel net

Abstract

To provide a raschel net that is light-weight and can be manufactured inexpensively while having appropriate elasticity.SOLUTION: In a raschel net 100 in which a plurality of vertical strands 1 and a plurality of horizontal strands 2 are arrayed so as to be orthogonal to each other, the vertical strands 1 are a chain stitch structure which consists of a small loop part 11 having small loops 11a with a smaller loop and a large loop part 12 having a large loop 12a with a larger loop than the small loop 11a, the horizontal strands 2 are a string-shaped string-like body, and the horizontal strands 2 are fixed to the small loop parts 11 by interlacement.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a raschel net that can be used for a variety of purposes, is lightweight, and has excellent strength. [Background technology]

[0002] The internet is used in every field. For example, in the agricultural field, agricultural nets are used in the cultivation of agricultural crops to promote the growth of the crops (vertical growth of stems). A specific example is a horticultural auxiliary net (agricultural net) that is used to guide the stems of flowers and plants in a desired direction when they are grown, and has vertical and horizontal mesh sizes of 10 mm to 30 mm and a shading rate of 10% or less (see, for example, Patent Document 1). Such agricultural netting is a plastic netting made of polypropylene and formed by the extrusion biaxial stretching method.

[0003] In the field of livestock farming, grass wrap nets are used to wrap roll bales of grass. Specific examples include a wrapping net which is knitted on a warp knitting machine using at least one type of yarn selected from the group consisting of monofilament yarn, multifilament yarn, and staple fiber spun yarn made of synthetic resin so that the knitting density is 0.5 to 20 courses / 2.54 cm and the distance between adjacent stitches in the length direction of the knitted fabric is 10 cm or less, resulting in a tensile elongation of the knitted fabric in the length direction after knitting of 40 to 150% (see, for example, Patent Document 2). Also known is a wrapping net made of a knitted fabric in which a group of warp yarns made of cellulosic fibers arranged in parallel in the length direction of the knitted fabric each form a plurality of independent chain stitches with continuous loops in the length direction of the knitted fabric, and each loop of the independent chain stitches is connected to other loops of other independent chain stitches by a weft yarn made of cellulosic fiber (see, for example, Patent Documents 3 to 5). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 7-274736 [Patent Document 2] JP 2014-133965 A [Patent Document 3] International Publication No. 2014 / 175300 Brochure [Patent Document 4] JP 2018-28158 A [Patent Document 5] JP 2020-128600 A DISCLOSURE OF THEINVENTION [Problem to be solved by the invention]

[0005] However, in any field, there is a demand for further weight reduction and cost reduction of nets. In particular, in recent years, the cost of raw materials has skyrocketed due to the soaring prices of fossil fuels.

[0006] Furthermore, in the field of agricultural products, conventional agricultural nets, including the agricultural net described in Patent Document 1, have the drawback of not having adequate stretchability. Similarly, in the field of livestock farming, conventional wrapping nets for pasture, including the wrapping nets described in Patent Documents 3 to 6 above, have warp threads that are made up of continuous loops (small loops), and therefore have appropriate elasticity, but because they are diamond-shaped nets, they have the disadvantage that they do not have adequate elasticity in the lateral direction. That is, in the above-mentioned fields, from the viewpoint of handling, appropriate stretchability in the longitudinal direction and appropriate dimensional stability in the lateral direction are required.

[0007] The present invention has been made in consideration of the above circumstances, and has an object to provide a Russell net that has appropriate elasticity, is lightweight, and can be manufactured inexpensively. [Means for solving the problem]

[0008] The inventors conducted intensive research to solve the above problems and discovered that the above problems could be solved by adopting a chain stitch structure for the vertical strands and employing large loop portions in the portions of the vertical strands other than the small loop portions that secure the horizontal strands, thereby completing the present invention.

[0009] The present invention relates to a Russell net in which a plurality of vertical strands and a plurality of horizontal strands are arranged so as to intersect at right angles, the vertical strands have a chain-knit structure consisting of small loop sections having small loops which are small and large loop sections having large loops which are larger than the small loops, the horizontal strands are string-like bodies (bundles of fibers) and the horizontal strands are fixed to the small loop sections by intertwining.

[0010] In the Russell net of the present invention, it is preferable that the net is lattice-shaped, with large loop portions and small loop portions arranged alternately in the vertical strands, with string-like bodies located above and below the lattice, large loops located on the left and right, and small loops and string-like bodies located at the intersections.

[0011] In the Russell net of the present invention, it is preferable that the small loop portion forms a small loop group in which a plurality of small loops are continuously connected, and that the cross strand is fixed to any one of the small loops in the small loop group by intertwining.

[0012] In the Russell net of the present invention, it is preferable that the large loop portion consists of one large loop, the vertical length of the large loop in the vertical strand is 2.5 cm or more, and the vertical length of the large loop in the vertical strand is 8 times or more the vertical length of the small loop.

[0013] In the Russell net of the present invention, the material of the warp strands and weft strands is preferably natural fiber made of cotton, hemp, silk, wool or jute, or a blended fiber made by blending different types of natural fibers.

[0014] In this case, the Russell net is preferably used as an agricultural net for promoting the growth of agricultural crops in the cultivation of the crops. Alternatively, it is preferably used as a wrapping net for wrapping roll bales for pasture. Effect of the Invention

[0015] In the Russell net of the present invention, the vertical strands have not only small loop portions but also large loop portions, so that the amount of yarn used can be reduced by the amount of the large loop portions compared to when only the small loop portions are continuous, and the knitting speed can be dramatically improved. As a result, the Russell net uses less material, making it significantly lighter in weight and reducing manufacturing costs. Furthermore, when the Russell net is used as a wrapping net for grass, the large loop portions have the advantage that the grass can easily get caught between the large loop portions.

[0016] Furthermore, the above-mentioned Russell net can be given appropriate stretchability in the vertical direction (lengthwise direction) by adopting a chain stitch structure for the vertical strands. This means that when used as an agricultural net, it can be set up by changing its shape even if there are obstacles in the way, reducing the possibility of damage. When used as a wrapping net for pasture, the net can be attached to a roll bale by conforming to the irregularities on the outer periphery.

[0017] On the other hand, the horizontal strands are made of cord-like material and are fixed to the small loop portions by interlacing, so that the dimensional stability is excellent. For this reason, when used as an agricultural net, the horizontal dimensions are unlikely to change, which has the advantage that it can be easily stretched when attached to the supports. Furthermore, when used as a wrapping net for pasture, it is possible to reliably cover the outer peripheral surface of a so-called roll bale with a uniform pressing force.

[0018] In the Russell net of the present invention, large loop sections and small loop sections are arranged alternately, with string-like bodies positioned above and below the lattice, large loops positioned on the left and right, and small loops positioned at the intersections, thereby achieving a balanced and sufficient weight reduction while also providing balanced and sufficient strength.

[0019] In the Russell net of the present invention, when the small loop portion forms a small loop group in which a plurality of small loops are continuously connected, elasticity can be imparted according to the number of small loops. In this case, it is sufficient that the lateral strand is fixed to any one of the small loops by intertwining.

[0020] In the Russell net of the present invention, the large loop portion consists of one large loop, and by setting the vertical length of the large loop in the vertical strand within the above-mentioned range and by setting the vertical length of the large loop in the vertical strand within the above-mentioned range, it is possible to achieve sufficient weight reduction and sufficient reduction in manufacturing costs.

[0021] In the raschel net of the present invention, the material of the vertical and horizontal strands is natural fiber consisting of cotton, hemp, silk, wool or jute, or a blended fiber in which different types of natural fibers are blended together, making the raschel net itself biodegradable in nature and therefore environmentally friendly.

[0022] The Russell net of the present invention is lightweight and can be manufactured inexpensively, and as described above, has appropriate elasticity, so that it can be suitably used as an agricultural net for promoting the growth of agricultural crops during cultivation, or as a wrap net for wrapping roll bales for pasture. [Brief description of the drawings]

[0023] [Figure 1] FIG. 1 is a schematic plan view showing a Russell net according to the present embodiment. [Diagram 2] FIG. 2 is an enlarged plan view showing a portion of the vertical strands of the Russell net shown in FIG. [Diagram 3] FIG. 3 is an enlarged plan view of the lattice portion of the Russell net shown in FIG. [Figure 4] FIG. 4 is a schematic perspective view showing an example in which the Russell net shown in FIG. 1 is used as an agricultural net. [Diagram 5] FIG. 5 is a schematic perspective view showing an example in which the Russell net shown in FIG. 1 is used as a wrapping net for pasture. [Figure 6] FIG. 6 is an enlarged plan view showing a portion of a vertical strand of a Russell net according to another embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0024] 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 are given the same reference numerals and duplicated explanations are omitted. In addition, unless otherwise specified, positional relationships such as up, down, left, right, etc. are based on the positional relationships shown in the drawings. Furthermore, the dimensional ratios of the drawings are not limited to those shown in the drawings.

[0025] FIG. 1 is a schematic plan view showing a Russell net according to the present embodiment. In FIG. 1, the longitudinal strands 1 are shown by dashed lines, and the transverse strands 2 are shown by solid lines. As shown in FIG. 1, the Russell net 100 of this embodiment is a lattice-like fiber net, and is composed of multiple vertical strands 1 arranged side by side at equal intervals, and multiple horizontal strands 2 arranged side by side at equal intervals in the vertical direction. The longitudinal strands 1 and the transverse strands 2 are arranged so as to intersect at right angles. As will be described later, the warp strands 1 and the weft strands 2 are made of fiber. Therefore, the Russell net 100 has excellent flexibility and can be bent or wound into a roll.

[0026] FIG. 2 is an enlarged plan view showing a portion of the vertical strands of the Russell net shown in FIG. As shown in FIG. 2, the warp strand 1 is made up of a small loop section 11 having small loops 11a, which are small loops, and a large loop section 12 having large loops 12a, which are larger in size than the small loops 11a. In other words, the warp strand 1 is made up of a portion consisting of a plurality of small loops 11a having a low density and a portion consisting of a single large loop 12a having a higher density. The vertical strand 1 has a configuration in which the large loop portions 12 and the small loop portions 11 are arranged alternately. That is, the warp strands 1 have a chain stitch structure knitted by a warp knitting machine. This gives the raschel net 100 appropriate stretchability in the vertical direction (longitudinal direction).

[0027] The large loop portion 12 consists of one large loop 12a. That is, the large loop portion 12, except for the connection portion with the small loop portion 11, is made up of a plurality of threads 12a1 which are independent (not connected) to each other. As a result, the Russell net 100 can be made sufficiently lightweight, and the manufacturing costs can also be reduced sufficiently.

[0028] Here, it is preferable that the length H2 of the large loop 12a in the vertical direction is at least 2.5 cm from the viewpoints of weight reduction and economy. The length H2 can be changed depending on the application, but from the standpoint of weight reduction and economy described above, the longer the length, the more preferable. The length H2 of the large loop 12a in the vertical direction means the distance between the connecting portions with the small loops 11a when the yarns 12a1 are arranged linearly in the vertical direction so as to be adjacent to each other. For this reason, the vertical length H2 of the large loop 12a is directly related to the vertical size of the lattice.

[0029] Furthermore, when the raschel net 100 is used as an agricultural net, the length H2 of the large loops 12a is preferably 10 to 30 cm from the viewpoint of ease of entanglement of agricultural products. Furthermore, when the raschel net 100 is used as a wrapping net for pasture, the length H2 of the large loop 12a is preferably 2.5 to 10 cm from the viewpoint of holding the pasture without breaking it.

[0030] The small loop portion 11 forms a small loop group in which a plurality of small loops 11a are continuously connected. In the small loop portion 11, the number of small loops 11a in the small loop group is preferably 1 to 5 from the viewpoint of imparting stretchability in the vertical direction. However, if the number of small loops 11a exceeds five, there is a drawback in that the effect on productivity decreases. Incidentally, in the Russell net 100 according to this embodiment, the small loop portion 11 is formed by three small loops 11a that are continuously connected to each other.

[0031] Here, the length H1 in the vertical direction of one small loop 11a is within a general range, and from the viewpoint of ease of manufacture, it is preferable that it is 0.5 to 1.0 cm. Moreover, the length H2 in the vertical direction of the large loops 12a in the vertical strands 1 is preferably 8 times or more the length H1 in the vertical direction of the small loops 11a from the viewpoints of weight reduction and economic efficiency.

[0032] The horizontal strands 2 are fixed to one of the small loops 11a by interlacing. That is, the horizontal strands 2 are fixed to the vertical strands 1 by being knitted while entangled with one small loop 11a of the group of small loops. Among the small loops, the small loops 11a that fix the transverse strands 2 by interlacing (hereinafter also simply referred to as "interlacing small loops") can be determined arbitrarily. Among the small loops, the small loops connected to the large loop 12a are the small loops 11a located at both the upper and lower ends.

[0033] At this time, when the small loop group is made up of three or more small loops, it is preferable that the small loop 11a located in the center portion is made to be an intertwined small loop. That is, it is preferable that the horizontal strands 2 are fixed to the small loops 11a located in the central portion by interlacing. In this case, the small loop 11a is positioned between the intertwined small loop 11a and the large loop portion 12, so that vertical elasticity can be imparted between the horizontal strand 2 and the large loop portion 12. As a result, there are advantages in that workability is improved and damage is less likely to occur.

[0034] The horizontal strands 2 are not knitted but are cord-like bodies (bundles of fibers). In other words, it is made by bundling fibers together into a single long, thin thread. In addition, twisting or the like may be performed. The above-mentioned warp strands 1 may be formed of the same string-like material as the weft strands 2, and may be knitted into a chain stitch structure. This gives the raschel net 100 excellent dimensional stability in the lateral direction (left-right direction).

[0035] In the Russell net 100, the material of the vertical strands 1 and the horizontal strands 2 is not particularly limited, but examples thereof include natural fibers such as cotton, hemp, linen, wool, cashmere, silk, and jute, synthetic fibers such as polyester fibers, polyamide fibers, polyurethane fibers, polyacrylonitrile fibers, polyvinyl alcohol fibers, polyvinyl chloride fibers, polypropylene fibers, polyethylene fibers, and polystyrene fibers, and blended fibers in which different types of fibers among these fibers are blended together.

[0036] Among these, the material of the warp strands 1 and the weft strands 2 is preferably natural fiber such as cotton, hemp, silk, wool or jute, or a blended fiber in which different types of natural fibers are blended together. In this case, the raschel net 100 itself is biodegradable in nature, making it environmentally friendly. It is particularly useful when used for agricultural nets and pasture wrap nets, which will be described later. In other words, when used as an agricultural net, conventional agricultural nets require a great deal of labor to dispose of after use, but the agricultural net of the present invention is biodegradable, so this problem can be solved. Furthermore, when used as a wrap net for pasture, there is a problem that livestock may eat it, but the wrap net for pasture of the present invention is biodegradable, and therefore has the great advantage that there is almost no adverse effect even if livestock eat it. Moreover, from the viewpoint of strength, the material of the warp strands 1 and the weft strands 2 is more preferably jute.

[0037] The Russell net 100 has a plurality of lattices L of the same shape in the vertical, horizontal and rear directions, and each lattice L has the same rectangular shape in a plan view. FIG. 3 is an enlarged plan view of the lattice portion of the Russell net shown in FIG. As shown in FIG. 3, the lattice L is an area surrounded by vertical strands 1 on the left and right and horizontal strands 2 above and below. Specifically, string-like bodies (horizontal strands 2) are located above and below the lattice L, large loops 12a are located on the left and right, and small loops 11a and string-like bodies are located at the intersections 3 where the vertical strands 1 and horizontal strands 2 intersect. As a result, as described above, the Russell net 100 can be sufficiently lightweight in a well-balanced manner, while also exhibiting sufficient strength in a well-balanced manner.

[0038] Here, the shape of the lattice L is not particularly limited, and may be a square or a rectangle. Furthermore, the distance D2 between adjacent horizontal strands 2 of the lattice L roughly corresponds to the length of the large loop 12. On the other hand, the distance D1 between adjacent vertical strands 1 is preferably 10 to 30 cm when used as an agricultural net from the viewpoint of the ease with which agricultural products become entangled, and is preferably 2.5 to 10 cm when used as a wrapping net for pasture from the viewpoint of holding the pasture without breaking it down.

[0039] The raschel net 100 is lightweight and can be manufactured inexpensively, and therefore can be used in a variety of fields as a replacement for conventional nets. Among these, the Russell net 100 has appropriate elasticity and can therefore be suitably used as an agricultural net for promoting the growth of agricultural crops during cultivation, or as a wrap net for wrapping roll bales for pasture.

[0040] FIG. 4 is a schematic perspective view showing an example in which the Russell net shown in FIG. 1 is used as an agricultural net. In FIG. 4, the Russell net 100 is used horizontally, with the vertical strands 1 shown by dashed lines and the horizontal strands 2 shown by solid lines. Incidentally, the Russell net 100 shown in Figure 4 is formed by cutting a Russell net in the horizontal direction in the middle as shown in Figure 4, in which a single horizontal strand 2 is woven in a meandering manner and the ends of adjacent horizontal strands 2 are connected. As shown in FIG. 4, the raschel net 100 is used by being stretched over supports 30 erected on both sides of a field 31 (including flower beds, etc.). Any type of crop is planted in the field 31, and in cultivating the crop, the vines of the crop can be entangled in the Russell net 100 to promote vertical growth of the crop.

[0041] The method of connecting the Russell net 100 and the posts 30 is not particularly limited, and may be the same as in the conventional method. The above-mentioned agricultural crops are not particularly limited, but climbing plants such as morning glory, cucumber, bitter melon, loofah, and Chinese yam are preferably used.

[0042] Compared to conventional agricultural nets, the Russell net 100 requires less material, making it significantly lighter in weight and reducing manufacturing costs. In addition, since the sheet has elasticity in the vertical direction, it can be changed in shape when installed even if there is an obstacle, and the possibility of breakage is reduced. In addition, since it has dimensional stability in the lateral direction, it has the advantage of being easy to expand when attached to the support 30.

[0043] FIG. 5 is a schematic perspective view showing an example in which the Russell net shown in FIG. 1 is used as a wrapping net for pasture. In FIG. 5, the longitudinal strands 1 are indicated by dashed lines, and the transverse strands 2 are indicated by solid lines. Moreover, both sides of the Russell net 100 shown in FIG. 5 are marked with solid lines, which are the overlapping of the dashed lines of the vertical strands 1 and the solid lines indicating the ends of the grass. As shown in FIG. 5, the raschel net 100 is attached to cover the outer periphery of a roll bale 32, which is made by shaping grass into a cylindrical shape using a baler (large machine).

[0044] The Russell net 100 can be significantly lighter in weight than conventional grass wrap nets, and the manufacturing costs can also be reduced. Also, since it has a large loop portion 12, there is an advantage that the grass can be easily caught when it is attached. In addition, since it has elasticity in the vertical direction, it can be attached to the roll bale 32 by conforming to the irregularities on the outer periphery. In addition, since it has dimensional stability in the lateral direction, the outer peripheral surface of the roll bale 32 can be reliably covered with a uniform pressing force.

[0045] The raschel net 100 is manufactured on a warp knitting machine. Specifically, chain stitch structures are knitted in parallel in the vertical direction, while large loop sections 12 and small loop sections 11 are knitted alternately and repeatedly, and a string-like body is inserted, bridged, and penetrated in the entire row in the horizontal direction in any small loop 11a to form an intertwining. As for design conditions, for example, the small loops 11a can be knitted at 0.3 to 1 mm x 2 to 3 times per course / inch, and the large loops 12a can be knitted at 20 to 100 mm x 1 to 2 times per course / inch. Therefore, compared to general warp knitting, the knitting speed can be increased by the amount of the large loops 12a.

[0046] Although the preferred embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments.

[0047] The Russell net 100 according to this embodiment has a lattice shape, but may have a diamond shape consisting of successive rhombus shapes. In this case, the opposing sides form a large loop 12a or a string-like body.

[0048] In the Russell net 100 according to this embodiment, the large loop portion 12 is made up of one large loop 12a, but may be made up of a plurality of large loops.

[0049] In the Russell net 100 according to this embodiment, three small loops 11a are continuously connected to form the small loop portion 11 (small loop group), but the present invention is not limited to this. FIG. 6 is an enlarged plan view showing a portion of a vertical strand of a Russell net according to another embodiment. As shown in FIG. 6, in the raschel net according to another embodiment, the vertical strand 1a is made up of a large loop portion 12 and a small loop portion 13, and the small loop portion 13 is made up of one small loop 11a. Even in this case, the weight can be sufficiently reduced and the manufacturing costs can be reduced. Although it has poor stretchability in the vertical direction, it may be used in applications where stretchability is not required.

[0050] The Russell net 100 according to this embodiment is exemplified as an agricultural net and a pasture wrap net for its uses, but is not limited thereto. [Industrial Applicability]

[0051] The Russell net according to the present invention can be used as a net. Specifically, it can be used as a substitute for conventional nets, and is particularly suitable for use as agricultural nets and pasture wrap nets. The Russell net according to the present invention has appropriate elasticity, is lightweight, and can be manufactured inexpensively. [Explanation of symbols]

[0052] 1,1a...longitudinal strand 100...Russell Net 11, 13 Small loop section 11a Small loop 12 Large loop section 12a Large Loop 12a1... Thread 2. Horizontal strand 30...post 31. Field 32. Roll bale L...lattice

Claims

1. In a Russell net in which a plurality of vertical strands and a plurality of horizontal strands are arranged perpendicular to each other, The warp strands have a chain knit structure including a small loop section having a small loop, the small loop being smaller than the small loop, and a large loop section having a large loop, the large loop being larger than the small loop, The transverse strand is a cord-like string-like body, A raschel net in which the cross strands are fixed to the small loop portions by interlacing.

2. It is latticed, In the vertical strands, the large loop portions and the small loop portions are alternately arranged, 2. The Russell net according to claim 1, wherein the string-like bodies are located above and below the lattice, the large loops are located on the left and right, and the small loops and the string-like bodies are located at the intersections.

3. The small loop portion forms a small loop group in which a plurality of the small loops are continuously connected, 2. The knitted net according to claim 1, wherein the cross strands are fixed to any one of the small loops by interlacing.

4. The large loop portion is composed of one large loop, The longitudinal length of the large loop in the longitudinal strand is 2.5 cm or more; and 2. The raschel net according to claim 1, wherein the longitudinal length of said large loops in said longitudinal strands is 8 times or more the longitudinal length of said small loops.

5. 2. The raschel net according to claim 1, wherein the material of the warp strands and the weft strands is natural fiber made of cotton, hemp, silk, wool or jute, or a blended fiber made by blending different types of the natural fibers.

6. 6. The raschel net according to claim 5, which is used as an agricultural net for promoting the growth of agricultural crops in cultivation of said crops.

7. 6. The raschel net according to claim 5, which is used as a wrapping net for wrapping roll bales for pasture.

Images