JPH0874158A - Truss type three-dimensional structural net - Google Patents

Abstract

PURPOSE: To enhance the pressure resistance and elastic force in the thickness direction and enable the good holding of a three-dimensional structure by forming a three-dimensional structural net having string line parts dividing mesh openings constituted into an air-and water-permeable three-dimensional structural net shape. CONSTITUTION: This truss type three-dimensional structural net is obtained by respectively braiding or weaving synthetic fiber yarns into a front and a back ground fabric parts 3 and 4 and constituting string line parts 1 dividing mesh openings 2 with connecting yarns 5 connecting the front and back ground fabrics so as to form a three-dimensional shape having air-and water-permeable voids. The string line parts 1 are constituted so as to knot with the adjacent string line parts located at shifted positions in the front and back ground fabrics 3 and 4 and alternately tilt the connecting yarns connecting the front and back ground fabrics in the respective string line parts left and right for each mesh opening and form a truss structure.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention is mainly used for collecting and draining nets and protection nets for residential land, grounds, slopes of constructed land, vegetation protection nets for seed spraying, construction protection nets, etc.
Truss type solid that can be widely used as various nets for heat insulating materials, agricultural nets, sports nets, medical nets, etc., industrial materials such as elastic core materials for cushions and mats, and various other applications. It relates to a structural net.

[0002]

2. Description of the Related Art For example,
As a net to be used as an embedding material for protecting the slopes of constructed land and levees and having a water collection and drainage effect, a conventional net with a three-dimensional structure in which the cord portion is simply a string is heavy and difficult to handle. Since there is a problem in construction workability and inferior elasticity and water collecting and draining effect, the applicant of the present invention has made the cord portion that defines the mesh holes hollow by allowing the connecting yarn and the front and back substrates to breathe and permeate. A three-dimensional net having a three-dimensional structure has been proposed (Japanese Patent Laid-Open No. 5-187011).

However, in the proposed three-dimensional structured net, the nodal portions of the cord portions that define the mesh holes are at the same position on the front and back sides, and the openings of the mesh holes on the front and back sides have the same shape. The connecting yarns between the front and back substrates forming the side faces are substantially orthogonal to the front and back faces.

Therefore, since the cord portion has a substantially hollow three-dimensional shape, the space between the front and back substrates of the three-dimensional structured net, that is, the thicker the net, the more problematic the pressure resistance is. Therefore, when a large load or pressure is applied in the thickness direction, there is a possibility that the cord portion may collapse or collapse to one side. If the cord portion is crushed, the thickness of the three-dimensionally structured net and the void retention rate decrease, and the effect of the three-dimensional structure cannot be expected. For example, it is buried in the soil as a net for collecting and draining slopes and a protective net,
Or, when it is stretched on the slope and used, the desired ventilation and drainage effect cannot be obtained.

Further, since the mesh holes of the above-mentioned three-dimensional structured net are opened in the same position and shape on the front and back sides, the covering area when stretched and used on the slope etc. is not so large, and seeds, soil, etc. The retention of is not so high.

The present invention has been made in view of the above, and the three-dimensional structure is stable by forming the truss structure in which the positions of the knot portions in the front and back base parts of the cord portion are different on the front and back sides. The pressure resistance and elasticity in the thickness direction are excellent, and the characteristics due to the three-dimensional structure can be maintained well,
The present invention provides a three-dimensional structural net that can be widely and suitably used for various purposes.

[0007]

DISCLOSURE OF THE INVENTION The present invention for solving the above problems is a three-dimensional net having a three-dimensional structure in which a cord portion that defines a mesh hole has a void that allows ventilation and water permeation. The strip portions are knotted in the front and back base parts respectively, and the knot portions are at different positions on the front and back sides, and the connecting portions connecting the front and back base parts in each cord portion are alternately inclined to the left and right to form a truss structure. It is characterized by doing.

According to a second aspect of the present invention, a synthetic fiber yarn is braided or woven, and the cord portion that defines the mesh holes is ventilated by the front and back substrate portions and the connecting yarns that connect the front and back substrate portions, respectively. And a three-dimensional structural net having a water-permeable vacant space, wherein the cord portion is continuous in one direction, and in the front and back base parts at every required interval in the continuous direction. It is characterized in that the portions of the connecting yarns that are displaced from each other are knotted with the adjacent string portions and that the connecting thread portions that connect the front and back base materials in each of the string portions are alternately inclined to the left and right to form a truss structure. .

As the above-mentioned three-dimensional structured net, a warp knitting is used to construct a three-dimensional shape in which a string-like portion composed of front and back base materials and connecting yarns connecting the two base materials has a void that allows ventilation and water permeation. The cord portion is continuous in the knitting direction with a width of one or more wales, and the cord portions are staggered from each other in the front and back base portions and are alternately knotted with the cord portions adjacent to each other on both sides. It is preferable that the connecting yarn portions in the portions are alternately inclined right and left.

In such a three-dimensional structured net,
It is preferable that the knots of the front and back base parts are located inwardly of the center part of the mesh hole opening of the base material on the other side. Further, the knots of the front and back base parts may be knotted alternately with the string portions adjacent to each other on both sides with different knot lengths.

Further, in any of the above three-dimensional structured nets, it is preferable that a synthetic resin is attached to at least one side of the front and back substrate parts by coating or dipping means.

[0012]

According to the above-mentioned three-dimensional structured net of the present invention,
Since the string part that defines the mesh holes has a three-dimensional structure with a void that allows ventilation and water permeability, the net as a whole has a three-dimensional structure that has the required thickness, and because of the void part of the string part, it is good It possesses excellent ventilation and water permeability.

In particular, in the cord portion, since the knots in the front and back base parts are at mutually different positions and the connecting parts between the front and back base parts are alternately inclined left and right to form a truss structure, On the other hand, when a load or pressure is applied in the thickness direction, they act to mutually regulate the collapse of the cord portions, and the shape of the mesh holes and the three-dimensional structure of the net become stable. That is, it is strong against load and pressure in the thickness direction, has excellent pressure resistance and shape retention, and can have good elastic force.

Further, in the case of the three-dimensional structured net according to the invention of claim 2, not only is the three-dimensional structure of the net stabilized by the truss structure of the cord portion defining the mesh holes, and the pressure resistance and shape retention are excellent, In particular, since it is composed of synthetic fiber yarns by braiding or weaving means, it is possible to give appropriate rigidity and shape retention by heat setting after processing and processing with synthetic resin, and also to define mesh holes. Due to the three-dimensional structure of the front and back base material and the connecting yarn, the cord portion can secure good ventilation and water permeability, and also has a water retention characteristic of the fiber assembly.

In the case of the third aspect of the invention, if the cord portion has a three-dimensional shape having a plurality of wales widths and voids, the cord portion can ensure further excellent ventilation and water permeability, In addition, the elasticity of the net as a whole becomes good. In addition, while the cord portion undulates in a zigzag manner, the knot portions of the front and back base parts are displaced and knotted with the adjacent cord portions, so that the connecting threads that support the front and back base parts are alternately inclined to the left and right. And the inclined portions of the connecting threads act so as to mutually regulate the deformation of the cord portions, and the spacing between the front and back base portions is maintained well. Moreover, it can be easily manufactured by warp knitting.

In particular, when the nodules in the front and back substrates are located inward of the mesh holes of the substrate on the other side, it is possible to retain substantially uniform elastic force and compressive strength. .

Further, as described in claim 5, the knot portions of the front and back base portions are knotted with the string portions adjacent to both sides with different knot lengths on the front and back sides, whereby the opening shape of the mesh holes is formed on the front and back sides. Alternatively, the adjacent mesh holes have different shapes, and by utilizing the shape, they can be suitably used as a slope protection net or a vegetation net.

Further, when the synthetic resin is applied to at least one side of the front and back base parts by coating or dipping means, the constituent yarns of the cord portion are held and fixed, and the stitches and the like are not loosened, and the structure is stable and Elasticity and compression resistance increase.

[0019]

Embodiments of the present invention will now be described with reference to the drawings.

FIG. 1 shows the external appearance of one embodiment of a truss type three-dimensionally structured net (A) knitted with synthetic fiber yarns. FIG. 2 is a perspective view of the same as above, and FIG. An enlarged perspective view and FIG. 4 are enlarged sectional views.

In the figure, (1) shows a cord portion that defines the mesh holes (2), and (3) and (4) show net-shaped front and back base portions, respectively. Reference numeral (5) shows a connecting thread which becomes a connecting portion between the front and back base materials (3) and (4).
The string portion (1) is formed by a gap between a large number of connecting threads (5) (5) by connecting the front and back base materials (3) and (4) to both by connecting the connecting threads (5). It is also formed in a three-dimensional shape having substantially hollow or three-dimensional voids that allow ventilation and water permeation in its longitudinal direction and inside and outside. (8)
Indicates the internal space.

The string portion (1) is knotted at the front and back base materials (3) and (4) to form a net-like shape, and particularly at the front and back base materials (3) and (4). The parts (6) and (7) are displaced from each other on the front and back sides, and the connecting yarns (5) of the front and back base parts (3) and (4) are alternately inclined left and right in the string portion (1) to form a truss structure. It is shaped like an eggplant.

In the case of the embodiment shown in the drawings, the warp knitting is carried out by a double Raschel machine having two rows of needle beds, and basically the front and back base parts (3 ) (4) and a connecting thread (5) for connecting the front and back base materials (3) and (4).

That is, the front and back base portions (3) and (4) of the cord portion (1) have a width extending over a plurality of wales (3 wales in the figure) as shown in an enlarged view in FIGS. In at least two wales at both ends (all wales in the figure), the connecting yarn (5) has front and back base parts (3) and (4).
The yarn is laid over and knitted, and thereby the connecting yarn (5)
The string portion (1) having a substantially hollow three-dimensional shape having a space (8) between (5) is formed continuously in the knitting direction.

Further, the cord portions (1) are located at different positions in the front and back base materials (3) and (4) by different knotting insertion yarns, that is, the front side mesh hole opening (2a).
The knot (6) and the mesh hole opening (2b) and the knot (7) on the back side are alternately knotted with the string portions (1) adjacent to each other so that the knots (6) and the knots (7) are in alternate positions. ,
The knots (6) and (7) are knitted so as to be located inwardly, for example, in substantially the center of the mesh hole openings (2b) and (2a) on the other side, whereby the knitting yarn (5) is knitted. direction,
That is, the mesh holes (2) are formed in a truss structure having a substantially V-shaped or inverted V-shaped cross section by alternately inclining to the right and left at every required interval in the continuous direction of the cord portions.

A specific example of manufacturing the truss type three-dimensional structured net will be described based on the knitting structure shown in FIG.

On the front side of the double Raschel machine, a chain knitting reed (L3) and a plurality of wales corresponding to the width of the cord portion (1) (for example, 3 wales as shown in the figure) By (L2), while inserting the insertion yarn into the wale of the chain knitting sideways, while knitting the ground structure of the front side base portion (3) of each cord portion (1), another insertion yarn reed ( L1), while laterally inserting the knotting insertion yarn, the knotting insertion yarns are alternately moved to the right and left at every required course interval corresponding to the mesh hole (2), and the front side base portion (3) of the adjacent string portion (1) is moved. ) Knit each other alternately on the left and right for one or several courses.

Also on the back side, similar to the front side, the inserted thread reed which is thread-removed for each of the chain knitting reed (L5) and a plurality of wales (3 wales in the figure) corresponding to the width of the cord portion (1). (L6) knits the ground structure of the back side base portion (4) of each cord portion (1), while laterally inserting the knotting insertion yarn by another insertion yarn reed (L7), At each course interval corresponding to the nodule portion (6) of the front side base portion (3), the back side base portion (4) of the string portion (1) is moved to the opposite side to the front side for one or several courses. Weave to knot.

Furthermore, the connecting yarn (5) is made with a fully packed reed (L4).
Is braided so as to connect the front and back base parts (3) and (4) by bridging between the front and back base parts (3) and (4) with each wale forming the cord part (1), and each cord part The space between the front and back base parts (3) and (4) of (1) is knitted so that only the connecting yarn (5) spanning both of them is substantially hollow or has a three-dimensional void.

After this knitting, the knitted fabric is appropriately widened so as to form a net shape, the mesh holes (2) are opened, and heat treatment or a processing treatment with a synthetic resin is applied to the knitted fabric so that the yarn to be used has an appropriate size. Rigidity and shape-retaining force are imparted to the cord portion (1) so that the cord portion (1) has a substantially hollow or three-dimensional shape with a three-dimensional void, and the knot portion (6) on the front surface side and the knot portion (7) on the back surface side. 1) and 2) are staggered with each other, and both knots (6) and (7) are located at substantially the center of the mesh hole openings (2b) and (2a) on the other side, respectively. The three-dimensional structural net (A) shown is obtained.

That is, in each cord portion (1), the front and back base portions (3) and (4) thereof have a zigzag shape in the knitting direction, and the front and back base portions (3) of each cord portion (1).
The connecting yarn (5) for connecting (4) is continuously wavy while alternately sloping to the left and right in the knitting direction to form a truss structure having a substantially V-shaped or inverted V-shaped cross section at the mesh hole (2). Become. Further, the mesh holes (2) are continuous between the cord portions (1) and (1) in the knitting direction and are alternately opened on the front side and the back side.

In the above case, when the connecting yarn (5) between the front and back base materials (3) and (4) becomes rough, it is possible to insert warps in this portion without forming stitches. Further, the connecting yarn (5) made of the reed (L4) can be divided into two reeds according to the lapping direction of the cord portion (1) defining the mesh hole (2) and the like.

FIG. 6 illustrates another knitting structure of the truss type three-dimensional structural net (A) of the present invention by warp knitting.

In the case of this embodiment, on the front side, two kinds of chain knitting reeds (L3) (l) for alternately guiding two chain knitting threads
4) and two types of insertion thread reeds (L1) (L2) that alternately guide the insertion thread every 2 wales, respectively, for the chain knitting reeds (L3) and (L4). While laterally inserting, the front side base portion (3) of the string portion (1) is knitted by a stitch row extending over 2 wales, and a chain knit wale is formed for each required course corresponding to the mesh holes (2). The chain knitting reeds to be knitted are moved laterally by 2 wales, and knotted alternately for 1 or several courses with the front side base part (3) of the string part (1) adjacent to the left and right, and then the original Knit so that it returns to the position.

On the back side, like the front side,
Two types of chain knitting reeds (L6) that alternately guide two chain knitting yarns
(L7) and the inserted yarn are alternately introduced every 2 wales 2
With the insert thread reed (L8) (L9) of the seed, the chain knit reed (L6
) (L7) while knitting the insertion yarns into the chain knit wales, knitting the back side base part (4) of the string part (1) by the stitch row extending over two wales, and knots on the front side. For each course corresponding to the course, the chain knit reed knitting the chain knit wales is moved laterally alternately to the opposite side of the front side by two wales, and the back side base part of the string portion (1) adjacent to the left and right Knitting is repeated alternately for 1 or several courses with (4) and then returned to the original position for knitting.

Further, a connecting thread (5) with a fully reed (L5)
Is knitted so as to connect the front and back base parts (3) and (4) by bridging the front and back base parts (3) and (4) with each wale that constitutes the cord portion (1).

Also in the case of this knitting structure, the front and back base portions (3) and (4) of each cord portion (1) have a width of 2 wales, and the front and back base portions (3) and (4) are both of them. 1 to FIG. 1 through FIG. 1 to FIG. 1 in which the string portion (1) is connected by the suspended connecting thread (5), and the string portion (1) has a three-dimensional void between the connecting threads (5) and (5) and which is permeable and water-permeable. Similar to 2, it is possible to obtain a three-dimensional structural net (A) in which the knot portions (6) and (7) of the front and back substrate portions (3) and (4) are respectively located at substantially the center of the mesh hole opening on the other side. it can.

In the above embodiment, the front and back substrate parts (3)
In order to reinforce (4), a reinforcing thread can be inserted as shown by reference numeral 10 in FIG.

In any of the above embodiments, the knot portions (6) and (7) of the front and back base materials (3) and (4) of each cord portion (1) are for mesh holes on the other side. Although the case where it is configured to be positioned approximately in the center of the opening is shown, the present invention is not limited to this, and the knot portion due to the knot insertion yarn in FIG. 5 or the knot portion due to the transition of the chain knitting reed in FIG. By appropriately changing the number of courses (interval),
For example, as shown in FIG. 7, front and back nodes (6) (7)
It is also possible to have a configuration in which the positions are slightly displaced from each other.

In this case, since the cord portion (1) in each mesh hole (2) mainly inclines to one side in the knitting direction, the inclination is utilized to make the earth and sand on the slope, seeds, fertilizer, etc. Can be suitably used as a protection net.

Further, the knot lengths (the number of knot courses) in the wale direction of the knot parts (6) and (7) of the front and back base parts (3) and (4) do not have to be the same, and, for example, as shown in FIG. The knot lengths of the knot portions (6) and (7) on the front and back sides, that is, the number of knot courses may be different on the front and back sides. By changing the nodule length on the front and back like this,
It is possible to obtain a three-dimensional structural net (A) in which the mesh hole openings (2a) on one of the front and back sides are substantially rhombic and the other mesh hole openings (2b) are substantially hexagonal. Although not shown, the positions of the front and back knots (6) and (7) can be slightly shifted in the knitting direction, and the knot lengths of the front and back knots (6) and (7) can be different. Is.

Further, front and back knots (6) and (7)
Alternately, for each row of knots in the knitting direction,
Alternatively, the knot length can be set as appropriate, for example, the knot length can be changed alternately for each row of knot portions in the left-right direction.

Regarding the size of the openings of the mesh holes (2) in the net (A) formed by the double Raschel knitting,
Nodules (6), (6) and (7) of the string portion (1)
(7) The length can be adjusted by increasing / decreasing the number of courses, that is, the number of courses.
It can be set arbitrarily. In addition, the cross-sectional shape of the string portion (1) and the void retention rate due to the internal space portion (8) depend on the space between the front and back base materials (3) and (4) and the front and back base materials (3) and (4). It can be set appropriately depending on the number of wales and the gauge interval (wale interval).

As a constitution of each of the above-mentioned cord portions (1), the front and back base materials (3) and (4) are formed by 2 to 3 wales, and the wale interval is set to be extremely small. It is also possible to form a plate-like three-dimensional shape having a slight three-dimensional void. It is possible to form the string portion (1) into a three-dimensional strip with one wale, but in practice it is preferable to have a plurality of wales as described above. When the number of wales is 3 or more, the connecting thread of the intermediate wales is omitted, and at least the wales at both ends are used for the front and back base parts (3)
A large hollow portion can be formed inside by connecting (4) with a connecting thread (5). Further, by setting the distance between the wales to be narrow, the density of the connecting yarn (5) can be increased.

In the above three-dimensional structured net (A),
The yarns constituting the front and back substrate parts (3) and (4) are not particularly limited, but synthetic fiber yarns having excellent water resistance are usually used, and nylon yarns, carbon fiber yarns and various other synthetic yarns are used. A fiber multifilament yarn or a monofilament yarn is preferably used. The thickness and material are determined in consideration of strength, tension, elasticity, etc. required for the application.
Further, as the connecting yarn (5), the front and back base parts (3) are used.
In order to be suitable for connecting (4) and supporting it in a three-dimensional manner, it is appropriately selected from the synthetic fiber yarns in consideration of elasticity, strength and the like as described above, and mainly monofilament yarns are preferably used. These yarns can be given appropriate rigidity and compression resistance by heat setting after knitting or by processing synthetic resin. Further, as the number of connecting yarns (5) connecting the front and back substrate portions (3) and (4) increases and the density increases, the pressure resistance and elastic force in the thickness direction increase. Of course, the thicker the thread is from the same material such as nylon, the stronger the waist becomes.

Use of elastic yarns for all or some of the yarns and the connecting yarns (5) constituting the front and back substrate portions (3) and (4), for example, for some wales of a plurality of ways constituting a cord portion. Therefore, it is possible to make a net having a three-dimensional structure having elasticity. In this case, a fit that cannot be obtained with a net that does not use elastic threads is obtained.

Further, in the above-mentioned three-dimensional structured net (A), as shown in FIG. 9, at least one side of the front and back substrate parts (3) and (4), for example, the back substrate part (4), is made of an acrylic resin or the like. The synthetic resin can be adhered and solidified on the yarn by coating means such as spraying or coating, or by dipping means. (9) shows the resin coating layer.

In this case, the stitches formed by warp knitting and the like are fixedly held to reinforce the base portion, there is no fear of loosening or fraying of the mesh, and the structure becomes stable, and the net having higher strength and elasticity is obtained. Is obtained. When the resin coating is carried out by a dipping means, the connecting yarn (5) between the front and back base materials (3) and (4) has a relatively coarse density and does not retain the resin, so the entire net is dipped. However, the ventilation and water permeability of the connecting portion are not impaired. In addition, by appropriately setting the amount of resin adhered to the front and back base parts, it is possible to ensure ventilation and water permeability of the base parts.

Further, the resin film may be laminated on the base parts on the front and back sides by laminating means and softened and melted to be integrated. In this case, mesh holes (2)
However, it may be laminated so as to close the openings of the mesh holes (2) on one side. In this case, the sheet has both a function as a sheet and a net as a three-dimensional structure. Further, other sheet materials such as non-woven fabric can be used by being stuck together.

In the above-mentioned three-dimensional structural net (A) formed by the double Raschel knitting, the inside of the cord portion (1) defining the mesh hole (2) is utilized by utilizing the knitting structure formed by warp insertion,
Alternatively, a pipe body such as a perforated pipe made of synthetic resin or a mesh pipe made of fiber, which is appropriately flexible and elastic, and has ventilation and water permeability between the cord portions (1) and (1). Can be inserted. This is shown in FIG.
In the structure shown in (1), the mesh pipe can be knitted by inserting it between two adjacent wales (not shown). It is also possible to insert the pipe body by post-insertion. In this case, the compressive strength of the cord portion (1) is
This is an improvement over the case of the above-described embodiment.

In addition to the above-mentioned pipe body, the net (A) may be used inside the substantially hollow three-dimensional string portion (1) or between the string portions (1) and (1). Depending on the purpose, a reinforcing rope or a string-like material such as cotton, nonwoven fabric or sponge can be inserted. As a result, in the case of the former, the strength of the net against tension or the like is improved, and the handling at the time of laying or tensioning becomes easy. In the latter case, the ventilation and drainage functions can be maintained well. In addition, it is also possible to give elasticity by inserting an elastic string-like material such as an elastic thread.

Furthermore, it is also possible to insert a string-like material holding seeds, fertilizers, medicines or the like, and in this case, it has a special function as a vegetation net or a medical net depending on its intended use. It can also be done.

In the above three-dimensional structured net (A), a connecting thread (5) for connecting the front and back base materials (3) and (4).
It is also possible to partially omit the above and open a part of the side surface of the cord portion (1) and pass the above-mentioned pipe body or cord-shaped object through the cord portion (1) in a direction crossing the cord portion (1). Is.

Further, not only the warp knitting by the double Raschel machine described above, but also other flat knitting, circular knitting, braiding means such as braid, or weaving means can be carried out. In addition, the cord portion defining the mesh hole is formed into a substantially hollow or three-dimensionally three-dimensional void having a front and back base material and a connecting thread that connects the front and back base material, and the cord portion is further The knots may be knotted at different positions, and the connecting portions that connect the front and back base portions in each cord portion may be configured so as to form a truss structure that is alternately inclined to the left and right. Further, it is also possible to implement the same constitution by synthetic resin molding.

The thickness of the three-dimensional structured net (A) of the present invention,
Openings (2a) (2b) of the mesh holes (2) and string portions (2)
The size of the net varies depending on its use. For example, in the case of civil engineering, construction, agriculture and fisheries, even a considerably large one can be used.
The width is set to 00 mm, the mesh holes are laid out in the range of 2 to 6000 mm, and the width of the cord portion is set in the range of 2 to 2000 mm. In the case of manufacturing by warp knitting, generally, the mesh holes are provided 2 to
The range is 1000 mm and the width of the cord portion is 2 to 500 mm. Those having a large size can be obtained by individually forming each cord portion in a continuous shape and knotting the cord portions to form a net. Also sports, clothing,
In the case of medical use and the like, a value smaller than the above value may be required.

The truss type three-dimensional structured net (A) as described above is used as, for example, a collecting and draining net, a water absorbing net, a stabilizing net or a protective net on a slope or a slope of a residential land or a constructed land, or a seed spraying net. It is also used as a vegetation protection net, a construction protection net, a structure making net, a medical net, or the like. In addition, it can be used for clothing by selecting a suitable material.

Then, the net (A) has a mesh hole (2).
Since the cord portion (1) that defines the structure has a three-dimensional shape with voids, it has a three-dimensional structure having a required thickness, but is lightweight and easy to handle, and has uneven surfaces such as slopes. It is easy to get used to, and construction work such as burying and tensioning can be done easily. Further, when the net is used for vegetation, since the nodes on the front and back are present at different positions, the area covered by the net is large and the retention rate of soil and seeds can be increased.

When this net (A) is buried and used as a net for collecting and draining slopes or slopes such as land for construction as shown in FIG. 10, the load by the embankment (20) on the net (A) is Although it acts on the net, in the cord portion (1), the knot portions (6) and (7) in the front and back base portions (3) and (4) are at mutually different positions, and the front and back base portions (3) and (4) Since the portion of the connecting thread (5) between the () is inclined to the left and right alternately for each mesh hole (2) to form a truss structure, the cord portion (1)
It acts to regulate the fall of each other. Therefore, the cord portion (1) is not excessively compressed or crushed, and the three-dimensional structure is well retained, the reduction of void retention can be prevented, and the ventilation and drainage effects are well retained. it can. Also, the elasticity of the thickness direction is well maintained due to the above-mentioned fall restraining action of the cord portion (1), and by utilizing this elasticity, it is used as an elastic core material such as a mat or a cushion, or an industrial material such as a cushioning material. Also available as

[0059]

According to the above-mentioned truss type three-dimensional structural net of the present invention, in particular, by forming the truss structure in which the cord portions defining the mesh holes are alternately inclined right and left for each mesh hole, the thickness direction is improved. Since it is strong against load and pressure, excellent in pressure resistance and shape retention, and can maintain good characteristics as a three-dimensional structured net, even when it is buried in the ground, excessive load due to embankment etc. It is possible to prevent compression and crushing, maintain a good three-dimensional structure, prevent a reduction in void retention rate, and maintain good ventilation and collection / drainage effects.

Moreover, since the cord portion has a three-dimensional shape with voids, it has a thick three-dimensional structure,
It is lightweight and easy to handle, and it is easy to carry out construction work such as transportation, storage and burying or tensioning.

Therefore, the truss type three-dimensional structured net of the present invention utilizes its characteristics as a collecting and draining net or a water absorbing net for a residential land, a ground, a reclaimed land, etc., or as a stability and protection net, and on the slope. It can be suitably used as a protective net, a seed spraying net, or a vegetation protective net. Further, it can be widely used as a protection net for construction, a net for constructing a structure, a net for agriculture, a shading net, and the like. Further, since it has good elasticity, it can be suitably used for industrial materials such as elastic core materials such as cushions and mats.

The three-dimensional structured nets according to the second and third aspects of the invention are easy to manufacture, and can be imparted with appropriate rigidity by heat setting after manufacturing, and the elasticity and compressive strength of the net are substantially uniform. It becomes uniform and good.

Furthermore, in the case where at least one of the front and back substrates is coated with a synthetic resin, even if it is formed by warp knitting, the stitches are held and fixed to further enhance the integrity, and the cut and used. Even if it does not fray,
Further, the elastic force and the compression resistance are increased, and the durability becomes excellent.

[Brief description of drawings]

FIG. 1 is a schematic plan view showing an embodiment of the present invention.

FIG. 2 is a perspective view of the same.

FIG. 3 is a partially enlarged perspective view of the above.

FIG. 4 is a partial enlarged cross-sectional view of the above.

FIG. 5 is an explanatory diagram showing a wrapping state with a specific knitting structure.

FIG. 6 is an explanatory diagram showing a wrapping state by a knitting structure of another example.

FIG. 7 is a schematic plan view showing another embodiment.

FIG. 8 is a schematic plan view showing still another embodiment.

FIG. 9 is an enlarged cross-sectional view of a portion showing still another embodiment.

FIG. 10 is a cross-sectional view when it is used as a net for collecting and draining land, etc.

[Explanation of symbols]

 (1) String portion (2) Mesh hole (2a) Front side mesh hole opening (2b) Back side mesh hole opening (3) Front side base part (4) Back side base part (5) Connecting yarn (6) ) Front side knot (7) Back side knot (8) Space (9) Resin coating layer

Claims (6)

[Claims] 1. A three-dimensional net having a three-dimensional structure in which a cord portion that defines a mesh hole has a permeable and water-permeable void, and the cord portions are knotted in the front and back base portions, respectively. A truss-type three-dimensional net having a structure in which the knot portions are located at different positions on the front and back sides, and the connecting portions connecting the front and back base portions in each cord portion are alternately inclined left and right to form a truss structure. . 2. A braided or woven fabric made of synthetic fiber yarn, and a cord portion defining a mesh hole has a permeable and water-permeable gap formed by a front and back base material and a connecting yarn connecting the front and back base material portions, respectively. A three-dimensional structural net configured to have a three-dimensional shape, wherein the cord portions are continuous in one direction and are displaced from each other in the front and back base parts at every required interval in the continuous direction. Truss-type three-dimensional structural net characterized by being knotted with adjacent string portions, and connecting thread portions connecting the front and back base materials in each string portion are alternately inclined to the left and right to form a truss structure. . 3. A warp knitting is used to form a string-like portion composed of front and back base materials and connecting yarns connecting the two base materials into a three-dimensional shape having a permeable and water-permeable void. While having a width of one or more wales and continuing in the knitting direction, the front and back base parts are displaced from each other and are knotted alternately with the adjacent string parts on both sides, so that the connecting thread part in the string part is formed. The truss type three-dimensional structural net according to claim 2, wherein the truss type three-dimensional net is alternately inclined to the left and right. 4. The truss-type three-dimensional structured net according to claim 2, wherein the knots of the front and back base parts are located inside the openings for mesh holes on the other side. 5. The knotted portion of the front and back base parts is knotted with the string portions adjacent to both sides with different knot lengths on the front and back sides, according to any one of claims 2 to 4. Truss type three-dimensional structural net. 6. The truss-type three-dimensional structured net according to claim 2, wherein a synthetic resin is attached to at least one side of the front and back substrate by coating or dipping means.