JP2009057670A - Warp knitted net fabric and material for civil engineering - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a warp knitted net fabric having a high strength that has not been attained by conventional warp knit fabrics by using a conventional warp knitting machine without using super thick knitting yarns by fully using a skillful network construction. <P>SOLUTION: The warp knitted net fabric T is provided as follows: in the fabric, beltlike chain stitch portions R prepared by connecting two or more chain stitches C by insertion yarns L are arranged and each of the arranged beltlike chain stitch portions R forms a connection part K connecting by laterally and alternatively stitching over right and left to the laterally adjacent beltlike chain portions R in every fixed courses, while the insertion yarns L the same as those connecting the chain stitches C are continuously inserted into the connection portions K. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a high-strength warp knitted net fabric having an unprecedented structure manufactured by using a raschel machine or a double raschel machine, and more specifically, a rock fall protection net, a civil engineering bag, a resin net, a soft net The present invention relates to warp knitted nets used for civil engineering materials such as ground improvement nets and civil engineering materials comprising the same.

For warp knitted fabrics used for civil engineering, this is knitted into a net structure, formed into a bag shape, and stones etc. are put in it and used for the rooting construction method, or used as a net for rock fall protection etc. (See Patent Literature).
These warp knitted fabrics are required to have high strength, and the only means for obtaining high strength is to use an extremely thick knitting yarn by a conventional net structure.
In order to knit the very thick knitting yarn, measures such as remodeling the knitting machine into a coarse gauge or introducing a dedicated machine are taken.

The gauge of these modified knitting machines and special machines (number of knitting needles arranged between 1 inch) is mainly 1 to 3 gauge coarse gauge, and the thickness of the knitting needle is used for 18 to 24 gauge knitting machines. It is 3 to 5 times as thick as the knitting needle to be manufactured, and the hook part is also large and specially manufactured.
Therefore, it is possible to obtain a high-strength warp knitting net fabric used for civil engineering and the like by using an 18-24 gauge raschel machine or a double raschel machine used for manufacturing a knitted fabric for clothing or interior. could not.
JP 05-106148 A Japanese Patent Publication No. 06-021405

As described above, in order to obtain a high-strength warp knitting net used for civil engineering, it has been necessary to modify the knitting machine or introduce a dedicated machine, which has been a major problem in terms of cost. It was.
In addition, once the gauge is set, it cannot be easily changed, and it is not easy to change the specifications of the high-strength warp knitted fabric.

Furthermore, the very thick knitting yarn to be used was not easy to prepare for knitting.
For example, extra-thick knitting yarns are extremely inefficient in terms of production, for example, because of their thickness, the winding length around the beam becomes shorter and the beam needs to be frequently replaced.
Further, no matter how thick the knitting yarn is, its thickness has a limit, and there is a problem that cannot be solved, such as a limit in the strength that can be obtained.
Thus, the conventional means for producing a high-strength warp knitted fabric for civil engineering has many problems to be solved.

  In order to solve the above problems, in the object of the present invention, a conventional thick knitting yarn is used by using an existing warp knitting machine without using a very thick knitting yarn and using a skillful net structure. A warp knitting net having high strength that cannot be obtained from the warp knitting net and a civil engineering material comprising the same.

  That is, according to the present invention, (1) a belt-like chain knitting portion formed by connecting two or more chain knittings with an insertion thread is arranged, and each of the arranged belt-like chain knitting portions is adjacent to the left and right belts. For the chain stitch part, a connecting part is formed that crosses and connects to the left and right alternately every fixed course, and the same insertion thread that connects the chain stitch is continuously inserted into the connecting part. It exists in the warp knitting net place.

  And, (2) a band-like chain knitting portion formed by connecting two or more chain knittings with an insertion thread is arranged, and each arranged band-like chain knitting portion is adjacent to each of the band-like chain knitting portions adjacent to the left and right. On the other hand, there are two warp knitted net fabrics that form connecting portions that are alternately connected to the left and right at regular intervals, and in which the same insertion yarns connecting the chain stitches are continuously inserted into the connecting portions. It exists in a warp knitted net fabric, which is formed by connecting the back and back sides of the sheets in a back-to-back manner.

  And (3) two warp knitting net fabrics are formed by connecting the chain knitting constituting each warp knitting net fabric and the sinker loops of the connecting portions in an X shape. It exists in the warp knitting net place of said (2).

  Also, (4) a belt-like chain knitting portion formed by connecting two chain stitches (1-0 / 0-1) with an insertion thread (0-0 / 2-2), and two chain stitches ( 0-1 / 1-0) are connected with insertion yarns (2-2 / 0-0) and the band-like chain knitting parts are alternately arranged, and each chain knitting band-like part is adjacent to the band-like chain knitting part. In the same position, the span (0-1 / 2-3 / 3-2 / 1-0) and the span (3-2 / 1-0 / 0-1 / 2-3) span each other. ) And the insertion thread (2-2 / 0-0 / 4-4 / 0-0) and insertion thread (2-2 / 4-4 / 0-0 / 4-4) exists in the warp knitting net according to the above (1).

  (5) A belt-like chain knitting portion A formed by connecting three chain braids (1-0 / 0-1) with an insertion thread (0-0 / 3-3) and three chain braids (0-1 / 1-0) are connected with an insertion thread (3-3 / 0-0) and striped chain knitting portions are alternately arranged, and each chain knitting strip portion is adjacent to the striped chain knitting. In the crossing part (0-1 / 3-4 / 4-3 / 1-0) and the crossing part (4-3 / 1-0 / 0-1 / 3-4) that are crossed between the parts It is connected with the formed connecting portion, and at the same time, an insertion thread (3-3 / 0-0 / 6-6 / 0-0) and an insertion thread (3-3 / 6-6 / 0-0) are connected to each spanning portion. / 6-6) is inserted in the warp knitting net according to 1 above.

  And (6) exists in the warp knitting net place of the said (1) description in which the connection part is formed with the cord structure.

  And (7), the warp knitting net fabric of Claim 4, 5 or 6 exists in the warp knitting net fabric formed by connecting the back side to the inside.

  And (8) exists in the material for civil engineering which consists of the warp knitting net place of any one of Claims 1-7.

  In addition, as long as the objective of this invention is met, the structure which combined said (1)-(8) suitably is also employable.

  According to the warp knitted net fabric of the present invention, as a means for adding strength, the warp knitted fabric is not a direct means using a very thick yarn for the knitting yarn, but a warp knitted fabric that obtains strength by connecting chain stitches with an insertion yarn. Since organizational means are adopted, there is an advantage that a high-strength warp knitting net can be obtained without the need for changing gauges or introducing special machines. There is a great advantage that the strength can be adjusted at the same time that the change is possible.

  And according to the warp knitting net fabric of the present invention, when connecting the chain knitting with the insertion yarn, in addition to means for connecting the chain knitting in parallel, the chain knitting is connected back and forth, or simultaneously connected in parallel. Since means for connecting the front and rear can be freely adopted, a high strength that has never been obtained can be obtained.

  And, according to the warp knitted net fabric of the double raschel structure of the present invention, the two knitted fabrics are formed with the back stitch side connected back to back, so that the ear winding phenomenon is suppressed, the form is stable, cutting, sewing The advantage that the processing such as is easy is obtained.

  According to the warp knitted net fabric of the present invention, since the chain knitting is the main component, the civil engineering materials (falling rock protection nets, tsunami barriers, beasts) that are stable with little stretch in the warp direction and receive strong pulling. Nets, marine nets, civil engineering bags, flat / slope reinforcement nets, geotextiles, etc.)

  As shown in FIGS. 1 (A) and 1 (B), the warp knitted net fabric of the present invention is a band-shaped chain knitting in which a certain number (2 to 3 or more) of chain knitting C is connected in a zigzag manner with an insertion yarn L. A portion R is formed, and these belt-like chain knitting portions R are connected to each other by a connecting portion K that is alternately extended to the left and right at regular intervals between the belt-like chain knitting portions R adjacent to the left and right. Is done.

In FIG. 1 (A) and FIG. 1 (B), the connecting part K is a spanning part from the chain knitted band part R2 to the chain knitted band part R1 located on the left side of the chain knitted band part R2. V21 is spanned at a constant course interval.
At this time, the bridging portion V12 is spanned from the chain knitted strip portion R1 to the chain knitted strip portion R2 at the same location.

Similarly, the bridging portion V12 is spanned from the braided strip portion R2 at regular intervals also to the braided strip portion R3 located on the right side.
At this time, the bridging portion V21 is spanned from the chain knitted strip portion R3 to the chain knitted strip portion R2 at the same location.
These spans V are stretched from each chain knitted band R to the adjacent chain knitted band R alternately on the left and right every other course to form a connecting portion K. It is formed.

  In FIG. 1A, the chain knitting C of the chain knitted band portion R has a structure shifted by one course for each chain knitted band portion R, and the insertion yarn L (for example, The insertion yarn L1 and the insertion yarn L2) are inserted in directions facing each other, become a target shape, and have a stable shape as a knitted fabric.

Furthermore, if the number of courses of the connecting portion K is increased to make the connecting portion K longer and approximately the same as the length of the chain knitted belt-like portion R, when the warp knitted net T is expanded, the perforation H is a tortoiseshell pattern. It becomes.
On the other hand, when the length of the chain knitted belt-shaped portion R is made relatively long with respect to the connecting portion K, the hole H becomes a diamond pattern when the warp knitted net fabric T is expanded.
In this way, the shape of the hole H can be arbitrarily changed by relatively adjusting the lengths of the connecting portion K and the chain knitted belt-like portion R.

The warp knitting net fabric T is obtained by a one-row needle bed Raschel machine (FIG. 4) in which knitting needles are arranged in one row, but a two-row needle bed knitting machine (FIG. 5) such as a double raschel machine is used. If used, a warp knitting net fabric T having a double raschel structure in which the two warp knitting net fabrics T are joined with the back NB side inside is obtained.
At that time, as shown in FIG. 5, in the double raschel machine, the knitting yarn is obtained by partially exchanging the arrangement of the group of cloths FG for knitting the outer fabric F and the group of braids BG for knitting the lining B. By crossing Y in an X-shape, the knitted fabric knitted is entangled with the sinker loop FS of the outer fabric F and the sinker loop BS of the lining B as shown in FIG. And can be securely connected without using knitting yarn.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
As shown in FIG. 1 (A), in Example 1, chain stitches are alternately arranged in units of two and shifted by one course.
In the structure chart, the structures of the chain stitches C11 and C12 of the band-shaped chain stitch part R1 are (0-1 / 1-0), and the structures of the chain stitches C21 and C22 of the band-shaped chain stitch part R2 are (1-0 / 0). -1), which is shifted by one course, and is repeatedly arranged as R1, R2, R1,... Alternately.

The two chain stitches C are connected with the insertion yarn L to form the chain stitch band-shaped portion R. However, each chain stitch C is shifted by one course so that the two chain stitches C are connected to each other. The yarn L1 and the insertion yarn L2 are inserted in a zigzag in a direction facing each other, so that a knitted fabric form which is an object shape and is systematically stable is obtained.
The structures of the insertion yarn L1 and the insertion yarn L2 of the chain knitted belt portion R1 and the chain knitted belt portion R2 are (2-2 / 0-0) and (0-0 / 2-2), respectively.

Next, the connecting portion K of the first embodiment will be described by taking the chain knitted band-shaped portion R1 and the chain knitted band-shaped portion R2 as an example as shown in FIG. 1B (enlarged view with the insertion yarn L removed).
The spanning portion V12 is stretched from the chain stitches C11 and C12 constituting the chain stitch band portion R1 to the chain stitches C21 and C22 of the chain stitch band portion R2.
Similarly, the bridging portion V21 is spanned from the chain stitches C21 and C22 to the chain stitches C11 and C12, and the connecting portion K is formed.

At this time, the organization of the passing portion V12 is (3-2 / 1-0 / 0-1 / 2-3), and the organization of the passing portion V21 is (0-1 / 2-3 / 3-3-). 2 / 1-0).
The insertion thread L1 in the connecting portion K has a structure of (2-2 / 4-4 / 0-0 / 4-4), and the insertion thread L2 is (2-2 / 0-0 / 4-4-4-0). 0).
In this way, the warp knitted net fabric T composed of the belt-like chain knitting portion R and the connecting portion K has a net structure having a hole H.

As shown in FIG. 2 (A), in Example 2, chain stitches are alternately arranged in units of three and shifted by one course.
In the organization chart, the structure of the chain stitch C11 of the strip-shaped chain stitch part R1 is (0-1 / 1-0), and the structure of the chain stitch C21 of the strip-shaped chain stitch part R2 is (1-0 / 0-1) 1 course deviation is alternately and repeatedly arranged.

The three chain stitches C are connected by the insertion yarn L to form the chain stitch band-shaped portion R, but each chain stitch C is shifted by one course, so that the three chain stitches C are connected to each other. The yarn L1 and the insertion yarn L2 are inserted in a zigzag in a direction facing each other, so that a knitted fabric form which is an object shape and is systematically stable is obtained.
The structures of the insertion yarn L1 and the insertion yarn L2 of the chain knitted strip portion R1 and the chain knitted strip portion R2 are (3-3 / 0-0) and (0-0 / 3-3), respectively.

Next, as shown in FIG. 2B (enlarged view with the insertion yarn L removed), the connecting portion K of the second embodiment will be described by taking the chain knitted band-shaped portion R1 and the chain knitted band-shaped portion R2 as an example.
The bridging portion V12 is spanned from the chain stitches C11, C12, C13 constituting the chain braid portion R1 to the chain stitches C21, C22, C23 of the chain braid portion R2.
Similarly, the bridging portions V21 are respectively crossed from the chain stitches C21, C22, and C23 to the chain stitches C11, C12, and C13 to form the connecting portion K.

At this time, the organization of the passing portion V12 is (4-3 / 1-0 / 0-1 / 3-4), and the organization of the passing portion V21 is (0-1 / 3-4 / 4-4-). 3 / 1-0).
And the insertion thread L1 in the connection part K becomes a structure of (3-3 / 6-6 / 0-0 / 6-6), and the insertion thread L2 is (3-3 / 0-0 / 6-6 / 0- 0). In this way, the warp knitted net fabric T composed of the belt-like chain knitting portion R and the connecting portion K has a net structure having a hole H.

As shown in FIG. 3A, in the third embodiment, the point where the chain knitted band portion R is formed by two chain knitting C and the chain knitting C of each chain knitted band portion R is shifted by one course. The same as the warp knitted net T described in the first and second embodiments.
The difference between the first and second embodiments and the third embodiment is the connecting portion K.
That is, the transfer part V that constitutes the connecting part K in the third embodiment is configured only by the code organization.

As shown in FIG. 3 (B) (enlarged view with the insertion thread L removed), the chain stitches C11 and C12 of the chain knitted belt-like portion R1 are provided with a spanning portion V12 (2-3 / 1- 1) formed of a cord structure. 0 / 2-3 / 1-0-2-3), and is connected to the chain knitting C21, C22 row of the chain knitting band-shaped portion R2.
Similarly, the chain stitches C21 and C22 are spanned and connected to the chain stitches C11 and C12 by the spanning portion V21 (1-0 / 2-3 / 1-0 / 2-3 / 1-0). In the connecting portion K in Example 3, the insertion yarns L1 and L2 are (4-4 / 0-0 / 4-4 / 0-0 / 4-4), (0-0 / 4-4 / 0-0). / 4-4 / 0-0).

Each of the above Examples 1, 2, and 3 is knitted with a single-row needle bed Raschel machine as shown in FIG. 4, and knitted with four ridges G1, G2, G3, and G4.
The loops G1 and G2 are used for knitting the chain stitch C, and the loops G3 and G4 are used for the insertion yarn L.
On the other hand, in the present Example 4, it knits using the double raschel machine of the 2 rows needle bed shown in FIG.
That is, the backs G1 and G2 are for the insertion yarn L of the outer fabric F, the backs G5 and G6 are for the chain stitch C of the outer fabric F, the backs G7 and G8 are for the insertion yarn L of the back B, and the backs G3 and G4 are the back B Used for chain knitting C.

In other words, the outer fabric F is knitted with the leathers G6, G5, G2, and G1, and the lining B is knitted with the leathers G3, G4, G7, and G8.
In this embodiment, the same structure is used for the outer fabric F and the lining B, and the same fabric as that used in the first embodiment is used. Therefore, the warp knitting net fabric T described in the first embodiment has 2 A warp knitted net T having a double raschel structure is obtained in which the sheets and the back stitch NB side are connected to each other inside and the face NF is set to the outside.
At that time, as shown in FIG. 5, the knitting yarns Y are crossed in an X shape by changing the cloth setting positions of the cloths G6 and G5 for the outer fabric F and the leathers G3 and G4 for the lining B. In the knitted fabric, the sinker loop FS of the outer fabric F and the sinker loop BS of the lining B cross each other and are entangled (shown in FIG. 7), so that it is ensured without using knots and knitting yarns for binding. Can be connected.
The sinker loop is a portion on a straight line that connects between loops in chain knitting or cord organization.

  As a result, as shown in the schematic diagram of FIG. 6, the warp knitting net fabric having a double raschel structure in which the warp knitting net fabric T of the outer fabric F and the warp knitting net fabric T of the lining B are in close contact with the back NB inside. T is obtained.

Although the details of the present invention have been described above, the warp knitted net T of the present invention is not limited to these embodiments, and other modifications and combinations are possible without departing from the essence thereof. Needless to say.
For example, the structure of the connecting portion K may be any structure as long as it is applied between the adjacent band-shaped chain stitch portions R.

Also, the insertion structure of the insertion yarn is not particularly limited as long as it has a function of connecting the chain knitting C to form the band-shaped chain knitting portion R, and there are many cases regarding the connection of two warp knitting nets T. Needless to say, it is possible to use any change organization.
Further, the warp knitted net can be applied to other fields as long as it can exhibit the characteristics in addition to the materials for civil engineering.

FIG. 1 (A) is a diagram showing a structure of a warp knitted net fabric T (Example 1) according to the present invention and includes an insertion yarn L. FIG. FIG. 1B is an enlarged view in which the insertion yarn L of the connecting portion K of the warp knitted net fabric T (Example 1) is excluded. FIG. 2A is a diagram showing the organization of the warp knitted net fabric T (Example 2) of the present invention, and includes the insertion yarn L. FIG. FIG. 2B is an enlarged view in which the insertion yarn L of the connecting portion K of the warp knitted net fabric T (Example 2) is excluded. FIG. 3 (A) shows a structure diagram of the warp knitted net fabric T (Example 3) of the present invention, and includes an insertion yarn L. FIG. FIG. 3B is an enlarged view in which the insertion yarn L of the connecting portion K of the warp knitted net fabric T (Example 3) is excluded. FIG. 4 shows a knitting schematic diagram of a single-row needle bed Raschel machine. FIG. 5 shows a schematic diagram of knitting by a double raschel machine with a two-row needle bed. FIG. 6 is a schematic view showing a state in which two warp knitting nets T are connected. FIG. 7 is a schematic diagram showing a state in which sinker loops of two warp knitted net fabrics T intersect in an X shape.

Explanation of symbols

T ... Warp knitting net base K ... Linking part V ... Crossing part R ... Striped chain knitting part C ... Chain knitting L ... Insertion thread H ... Hole G ...・ Osa Y ... Knitting yarn F ... Outer fabric B ... Lining NF ・ ・ Face NB ・ ・ Face FS ・ ・ Sinker loop of outer fabric F BS ・ ・ Sinker loop of lining B

Claims (8)

  Two or more chain stitches are connected with an insertion thread, and a band-like chain knitting portion is arranged, and each of the arranged band-like chain knitting portions is arranged at regular intervals with respect to the respective band-like chain knitting portions adjacent to the left and right. A warp knitted net fabric having a connecting portion that is alternately connected to the left and right, and in which the same insertion yarn that connects the chain stitches is continuously inserted into the connecting portion. .   Two or more chain stitches are connected with an insertion thread, and a band-like chain knitting portion is arranged, and each of the arranged band-like chain knitting portions is arranged at regular intervals with respect to the respective band-like chain knitting portions adjacent to the left and right. Two warp knitted nets formed by connecting the same insertion yarns that are connected to the chain stitches in succession, forming a connecting portion that is alternately connected to the left and right. A warp knitted net fabric characterized in that the sides are connected back to back inside.   The two warp knitting net fabrics are formed by joining the chain knitting constituting each warp knitting net fabric and the sinker loops of the connecting portions so as to cross each other in an X shape. Item 2. The warp knitting net according to item 2.   A belt-like chain knitting portion formed by connecting two chain stitches (1-0 / 0-1) with an insertion thread (0-0 / 2-2), and two chain stitches (0-1 / 1-0) ) Are connected alternately with insertion yarns (2-2 / 0-0), and the chain knitted belt portions are alternately arranged at the same position between the adjacent belt knitted chain portions. A connection formed by the spanning portion (0-1 / 2-3 / 3-2-1 / -0) and the spanning portion (3-2 / 1-0 / 0-1 / 2-3) Are connected to each other at the same time with insertion thread (2-2 / 0-0 / 4-4 / 0-0) and insertion thread (2-2 / 4-4 / 0-0 / 4-4). The warp knitted net fabric according to claim 1, wherein:   A belt-like chain knitting part A formed by connecting three chain braids (1-0 / 0-1) with an insertion thread (0-0 / 3-3), and three chain braids (0-1 / 1- 0) are connected with insertion yarns (3-3 / 0-0) and the band-like chain knitting parts are alternately arranged, and each chain knitting band-like part is stretched between adjacent band-like chain knitting parts. Connected at the connecting part formed by the connecting part (0-1 / 3-4 / 4-3 / 1-0) and the connecting part (4-3 / 1-0 / 0-1 / 3-4) At the same time, the insertion thread (3-3 / 0-0 / 6-6 / 0-0) and the insertion thread (3-3 / 6-6 / 0-0 / 6-6) are inserted into the respective spans. The warp knitted net fabric according to claim 1, wherein the warp knitted net fabric is formed.   The warp knitted net fabric according to claim 1, wherein the connecting portion is formed of a cord structure.   A warp knitted net fabric according to claim 4, wherein the warp knitted net fabric is formed by connecting two back knitted net fabrics on the inner side.   A civil engineering material comprising the warp knitted net according to any one of claims 1 to 7.

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