JP4743780B2 - Industrial two-layer fabric - Google Patents

Description

  The present invention relates to an endless industrial two-layer fabric such as a papermaking fabric, a conveyor belt, and a filter fabric.

Conventionally, fabrics woven with warps and wefts have been widely used as industrial fabrics, and specific examples include papermaking fabrics, conveyor belts, filter fabrics, etc., each suitable for its intended use and usage environment. Textile properties are required. In particular, there is a strict demand for papermaking fabrics that use the mesh of the fabric to dehydrate the raw material, surface smoothness that prevents the wire marks of the fabric from being transferred to the paper, and dehydration to sufficiently dehydrate excess water contained in the material. Properties, rigidity that can be used suitably even in harsh environments, abrasion resistance, and properties as a fabric that can sustain the conditions necessary to produce good paper for a long time ing. In addition, fiber support, improvement in paper yield, dimensional stability, running stability, and the like are required. In recent years, the speed of papermaking machines has increased, and the demand for papermaking fabrics has become more severe.
As described above, the papermaking fabric, which is the most demanding of the industrial fabrics, can be understood to understand the requirements and solutions of most industrial fabrics. Therefore, the present invention will be described below on behalf of the papermaking fabric.

  In recent years, fabrics having a two-layer structure, in which surface smoothness and fiber support properties are made to function on the upper surface side layer and rigidity and abrasion resistance are given to the lower surface side layer, are widely used. In particular, the development of two-layer fabrics in which the upper and lower layers are woven with warp binding yarns is progressing. For example, Patent Document 1 shows a two-layer woven fabric in which two warp binding yarns form a pair to bind the upper and lower layers and form a structure of one warp on the upper surface and the lower surface. ing.

  In the fabric of the design diagram of FIG. 1 shown in the publication, warps 1, 5 are two warp binding yarns, and warps 2, 3, 4, 6, 7, 8 are upper surface side warp, lower surface side. It is a warp. Between the binding yarn sets 1 and 5, there are three warp sets 2, 3, 4 and warp yarns 6, 7, 8. This woven fabric is a 16-shaft woven fabric that forms a complete structure by 16 warps, that is, 8 sets of warps, and 4 of the 16 warps are binding yarns. The binding yarns are in one set of two, and the four binding yarns are divided into two sets and arranged with three warp pairs interposed therebetween. For this reason, the connection is concentrated at two places, and as a whole of the fabric, there are portions that are in close contact and portions that are not in close contact. Such a phenomenon is unlikely to occur in a woven fabric in which many binding yarns are arranged, but non-uniform adhesion and dehydration may occur in a woven fabric having a small number of binding yarns. Furthermore, the warp binding yarn is a yarn that moves up and down both the upper surface side layer and the lower surface side layer. Since the two binding yarns form a pair, the weft yarn is sandwiched from above and below at the binding location and the portion is compressed. So, the drainage and knuckle height may change from other parts. This may give marks to the paper, and may change the thickness of the paper and the ink load.

  Therefore, a fabric that can improve them has been developed. For example, in FIG. 1 of Patent Document 2, warp yarns 1 and 5 are a set of upper warp binding yarns composed of upper warp binding yarns and lower surface side warp yarns, and warp yarns 2, 3, 4, 6, 7, 8 Is a set of upper and lower warps composed of upper surface side warps and lower surface side warps. This embodiment is a 16-shaft woven fabric having two binding yarns. However, as in the embodiment of Patent Document 1, when a 16-shaft woven fabric having four binding yarns is used, for example, warps 1, 3 are used. , 5 and 7 can be a pair of upper warp binding yarns. The upper warp binding yarn group is composed of an upper warp binding yarn and a lower surface side warp. Assuming that, 4 out of 8 sets become upper warp binding yarn groups, and the binding locations are dispersed even though the binding yarns are the same four yarns. Is resolved.

However, since the upper warp yarn of this fabric passes through the lower side of the lower surface side weft and connects the upper and lower layers, for example, when the fabric is bent downward along the shape of the roll, the binding yarn is lower side There is a problem in that it floats up at the joint where wefts are woven, which causes loosening between the upper and lower layers, causing internal wear.
Because of these problems, further improvements regarding double-layer fabrics using warp binding yarns have been required.

JP 2003-342889 A Japanese Patent Laid-Open No. 2004-36053

  The present invention provides an industrial two-layer woven fabric that prevents loosening of the upper and lower layers of the fabric due to the floating of the binding yarn, firmly and evenly adheres the upper and lower layers, and has a uniform fabric surface height and drainage. For the purpose.

  The inventor of the present invention has a problem in the conventional industrial two-layer fabric, uneven contact as a fabric, generation of a mark due to pulling of the binding portion, internal wear of the upper and lower layers of the fabric due to loosening of the binding portion. In order to solve the occurrence, etc., in the complete structure constituting the woven fabric, a set of a lower warp binding yarn consisting of an upper warp and a lower warp binding, an upper warp consisting of a lower warp and an upper warp yarn By arranging one or more sets of yarn sets, we have developed a fabric that has the conditions required for industrial fabrics. The present invention employs the following configuration in order to solve the above problems.

(1) The upper warp and the lower warp binding yarn arranged almost vertically are combined into a lower warp binding yarn, and the lower warp and upper warp yarn arranged almost vertically are upper warp binding. In the industrial two-layer fabric used as a yarn set, in the lower warp binding yarn set, the upper warp yarn does not pass above the upper surface side weft that should normally pass through the fabric structure, and the lower warp binding yarn in the pair is not A structure of one warp is formed on the surface on the upper surface side through the upper surface side weft, and the structure of one warp is formed on the surface of the lower surface side by weaving the lower warp binding yarn and the lower surface side weft. In the upper warp binding yarn set, the lower warp does not pass below the lower side weft that should pass through the fabric structure, and the upper warp yarn that is paired passes under the lower weft. A structure of one warp is formed on the lower surface, and the upper warp and the upper weft are interwoven to form a structure of one warp on the upper surface. To a industrial two-layer fabric, wherein the the set of the upper through binding yarn and the set of the lower through binding yarn is present the one or more sets.

(2) The industrial two-layer woven fabric according to (1), wherein the warp constituting the woven fabric is only the set of the lower warp binding yarn and the set of the upper warp binding yarn.
(3) The warp constituting the woven fabric is a set of the lower warp binding yarn, the set of the upper warp binding yarn, and the set of the upper and lower warps in which the upper surface side warp and the lower surface side warp are arranged vertically (1 2) the industrial two-layer fabric described.

(4) The industrial two-layer woven fabric according to any one of (1) to (3), wherein the pair of lower warp binding yarns and the pair of upper warp binding yarns are alternately arranged one by one. is there.
(5) The industrial two-layer woven fabric according to any one of (1) to (4), wherein the lower warp binding yarn group and the upper warp binding yarn group are uniformly arranged at the same ratio. is there.

(6) The industrial two-layer woven fabric according to any one of (1) to (5), wherein all warps constituting the woven fabric have the same wire diameter.
(7) The industrial double-layer woven fabric according to any one of (1) to (6), wherein the structure of the upper surface side layer is any one of a twill weave, a broken twill weave, a satin weave, and a plain weave.

  The present invention includes a set of a lower warp binding yarn consisting of an upper surface side warp and a lower warp binding yarn, and a set of an upper warp binding yarn consisting of a lower surface side warp and an upper warp binding yarn in the complete structure constituting the woven fabric. By arranging one or more of each of these, it is possible to prevent the fabric from loosening due to the rising of the binding yarn, and to achieve a strong and uniform adhesion between the upper and lower layers, the fabric surface height, and the uniform drainage.

The feature of the industrial two-layer woven fabric according to the present invention is that the complete structure constituting the woven fabric includes a set of a lower warp binding yarn composed of a lower warp binding yarn and an upper side warp, an upper warp binding yarn and a lower side warp yarn. One or more sets of upper warp binding yarns are arranged.
In the present invention, the complete structure is the minimum repeating unit that forms a woven structure, and this is repeated in the front, rear, left, and right to form a woven fabric. A knuckle is a portion of a warp that protrudes from the top or bottom of one or two wefts to the surface. A crimp is a long float that is formed on the surface by a weft passing above or below a plurality of warps. Say.

  As warp binding yarns, there are upper warp binding yarns and lower warp binding yarns, warp binding yarns arranged almost above and below the upper side warp are called lower warp binding yarns, The upper side weft and the lower side weft are interwoven. The warp binding yarn arranged substantially above and below the lower surface side warp is called the upper warp binding yarn. The upper warp binding yarn is woven with both the upper surface side weft and the lower surface side weft. In the set of warp binding yarns, the warp binding yarns and the pair of warp yarns are adjacent to each other and intersect in the fabric layer, but are basically arranged vertically.

In the lower warp binding yarn set, the upper warp does not pass above the upper weft that should pass through the fabric structure. Instead, the lower warp yarn passes over the upper weft, and these cooperate. Thus, a structure corresponding to one warp is formed on the upper surface side surface, and the lower warp binding yarn and the lower surface side weft are interwoven to form a structure corresponding to one warp. On the other hand, in the upper warp binding yarn set, the lower warp does not pass below the lower side weft that should pass through the fabric structure. Instead, the upper warp yarn passes under the lower weft, In cooperation, a structure for one warp is formed on the lower surface, and the upper warp and upper surface wefts are interwoven to form a structure for one warp.
The “upper surface side weft that should pass through the fabric structure” and the “lower surface side weft that should pass through the fabric structure” as used herein refer to the surface on the upper and lower sides of the industrial fabric in order to form a uniform woven surface. The warp and weft appearing in the same structure is repeated. Therefore, in the set of warp binding yarns, it means that it is inevitably determined which wefts should pass over or under to form a knuckle in order not to break the surface structure. . The warp binding yarn has the function of weaving the upper and lower layers without breaking the surface structure. The structure formed by the cooperation of the two warp yarns of the warp binding yarn group is simply the upper surface side on the surface. The upper side warp woven with the weft and the lower side warp simply woven with the lower side weft can be made substantially the same.

The set of warps is composed of an upper surface side warp and a lower surface side warp and is arranged vertically. Since these do not have the function of weaving the upper and lower layers, the upper surface side warp is woven only with the upper surface side weft, and the lower surface side warp is woven only with the lower surface side weft. In the present invention, a set of warps may not necessarily be arranged.
In the woven fabric of the present invention, one or more sets of lower warp binding yarns and upper warp binding yarns may be arranged, and the arrangement order, arrangement ratio, and the like are not particularly limited. The upper and lower warp pairs may or may not be disposed between the warp binding yarn pairs. For example, a pair of upper warp binding yarns and a pair of lower warp binding yarns may be alternately arranged, and a pair of upper and lower warp yarns, a group of lower warp binding yarns, a group of upper warp binding yarns May be arranged in order. Considering various uniformity of the woven fabric, it is preferable to arrange each warp group uniformly.

The number of warp binding yarns may be one or two or more in the upper warp binding yarn or lower warp binding yarn group in the complete structure. The warp binding yarn preferably has a structure that passes above and below one or two upper surface side wefts and lower surface side wefts. This is because, in paper fabrics, it is not suitable from the viewpoint of fiber support that warp yarns form a long float on the surface in terms of abrasion resistance and fiber support, so at most on two wefts. It is better to have a tissue that passes under. However, in other applications, there may be a structure in which the warp is long and appears on the surface.
As used herein, the term “binding location” refers to a location where the upper warp binding yarn is woven through the lower surface side weft or the lower warping yarn is woven through the upper surface side weft. The connection location is not particularly limited. However, if the connection location is positioned so as to disrupt the structure of the upper surface layer and the lower surface layer, the uniformity of the surface is disrupted, which is not suitable. It is necessary to determine in consideration of the structure of the upper surface side warp, the lower surface side warp, and other warp structures that are paired with the warp binding yarn.

The upper surface side structure and the lower surface side structure formed by these are not particularly limited. For example, the structure of the upper surface side layer may be a twill weave, a broken twill weave, a satin weave, or the like. Of course, it may be a plain weave structure, but when the upper warp yarn passes below the lower side weft, it suddenly falls to the lower layer and then suddenly rises to the upper layer. It is not preferable in the field where importance is attached. Of course, other tissues may be used, and may be determined according to the use and required physical properties.
It is preferable that the lower surface side layer structure is a structure in which the lower surface side weft passes under the lower surface side warps to form a long crimp, since it is effective in wear resistance. In addition, in a field where wear resistance is not considered important, there may be a woven fabric structure and other structures in which two adjacent warps form the same structure, and there is no particular limitation.

A feature of the present invention is that one or more sets of upper warp binding yarns and lower warp binding yarns are arranged in the complete structure constituting the woven fabric. The advantages of this structure are that the upper and lower layers of the fabric caused by the rising of the binding yarn can be prevented, and the knuckle surface height, adhesion, and drainage can be made uniform throughout the fabric.
The above-mentioned fabric of Patent Document 1 is a 16-shaft fabric using two sets of four warp binding yarns. This woven fabric is a set of two binding yarns, and in order to arrange the binding yarns evenly, three warp yarn sets are arranged between the binding yarn sets. However, this causes a problem that the bonding points are partially concentrated, so that the upper and lower layers of the fabric are not uniformly adhered to the entire fabric.

  Furthermore, FIG. 10 shows a cross-sectional view of a set of binding yarns of the fabric of FIG. As shown in FIG. 10, the two warp binding yarns are both yarns that move up and down the upper surface side layer and the lower surface side layer, and have a portion where they intersect between the upper and lower layers, but are almost up and down. It is arranged. The wefts are woven together by warp binding yarns and compressed from above and below toward the center of the upper and lower layers of the fabric. Therefore, as indicated by the arrows in FIG. 10, the space ratio and the net thickness of the woven fabric change at the connecting portion, and the freeness and surface height may change from other portions.

  In addition, the woven fabric of Patent Document 2 is composed of a set of binding yarns composed of a lower warp and an upper warp, and the upper warp yarn passes under the lower weft at the binding portion. Since it is a yarn that binds the upper and lower layers, when the fabric is bent downward so as to hold the roll, the binding yarn floats at the binding portion that interweaves the lower surface side weft as shown in FIG. 11 of this specification. As a result, looseness may occur in the upper and lower layers.

Therefore, in the present invention, an attempt has been made to solve these problems by adopting a configuration in which one or more pairs of upper warp binding yarns and lower warp binding yarns are arranged in the complete structure constituting the woven fabric. . In a woven fabric composed of a pair of upper warp binding yarns composed of an upper warp binding yarn and a lower surface side warp as in Patent Document 2, when the fabric is bent downward, the binding yarn is lifted at the portion where the lower side weft is woven May end up. Similarly, in a fabric composed of a lower warp binding yarn composed of a lower warp binding yarn and an upper surface side warp, if the fabric is bent upward, the binding yarn may be lifted at the portion where the upper surface side weft is woven. is there. Therefore, by arranging both the lower warp binding yarn that weaves the upper and lower layers through the upper surface side weft and the upper warp yarn that weaves the upper and lower layers through the lower surface side weft, Even if bent sideways, the looseness of the upper and lower layers can be eliminated. Both the upper warp binding yarn and the lower warp binding yarn exist in the woven fabric of Patent Document 1, but the two warp binding yarns form a pair adjacent to each other. Concentration of the fibers causes vertical drop on the surface of the fabric or changes the density of the mesh, resulting in non-uniform drainage, making it impossible to produce paper with excellent uniformity.

  Regarding the wire diameter of the yarn constituting the woven fabric of the present invention, in order to obtain a dense and smooth surface, it is preferable that the upper surface side weft and the upper surface side warp constituting the upper surface side have a relatively small diameter. . Upper warp binding yarn, lower warp binding yarn, and upper warp side yarn form an upper surface side surface structure. Therefore, the upper warp yarn should be the same diameter as the upper surface side warp yarn. Since the upper surface side weft has a relatively small wire diameter, and the lower layer on the machine or roll contact surface side requires rigidity and wear resistance, the lower surface side weft has a relatively small wire diameter. It is preferable to have a large value. The arrangement ratio of the upper surface side wefts and the lower surface side wefts may be 1: 1, and other ratios such as 2: 1, 3: 2, 4: 3 can be selected as appropriate. Depending on the case, it may be a ratio such as 1: 2 or 2: 3 in which the yarn density of the lower surface side layer is larger than the yarn density of the upper surface side layer. Further, for each constituent yarn of warp and weft, two or more yarns may be juxtaposed.

  The yarn used in the present invention may be selected depending on the application. For example, in addition to monofilament, multifilament, spun yarn, crimped processing, bulky processing, etc., generally textured yarn, bulky yarn, stretch yarn, etc. Processed yarns that are called, or yarns that are combined by twisting them can be used. Also, the cross-sectional shape of the yarn is not limited to a circle, but a short yarn such as a square shape or a star shape, an elliptical shape, or a hollow yarn can be used. The material of the yarn can also be freely selected, and polyester, polyamide, polyphenylene sulfide, polyvinylidene fluoride, polypro, aramid, polyetheretherketone, polyethylene naphthalate, polytetrafluoroethylene, cotton, wool, metal, etc. are used. it can. Of course, you may use the thread | yarn which blended and contained various substances according to the objective to these copolymers or these materials.

  In general, as the papermaking wire, it is preferable to use a polyester monofilament having rigidity and excellent dimensional stability for the upper surface side warp, the lower surface side warp, the warp binding yarn, and the upper surface side weft. In addition, it is preferable to interweave polyester monofilaments and polyamide monofilaments alternately on the lower surface side wefts that require wear resistance so that the wear resistance can be improved while ensuring rigidity.

The Example which concerns on the industrial two-layer fabric of this invention is described with reference to drawings.
1 to 9 are embodiments of the present invention and show design drawings. The design drawing is the smallest repeating unit of the fabric structure, and this complete structure is connected vertically and horizontally to form the entire fabric structure. In the design drawing, warps are indicated by Arabic numerals, for example, 1, 2, and 3, and a pair of lower warp binding yarns composed of upper side warp and lower warp binding threads is indicated by numbers with a, for example, 1a and 3a. A pair of upper warp binding yarns composed of lower surface warp and upper warp binding yarns is indicated by numerals with b, for example, 1b and 3b, and a pair of warp yarns consisting of upper surface side warps and lower surface side warp yarns is 1, 2, This is shown in FIG. Wefts are indicated by Arabic numerals with dashes, for example, 1 ', 2', 3 '. Depending on the arrangement ratio, the upper surface side weft and the lower surface side weft may be arranged one above the other, or only the upper surface side weft may be provided.

  Further, a cross indicates that the upper surface side warp is located above the upper surface side weft, and a □ indicates that the lower surface side warp is located below the lower surface side weft. ● indicates that the upper warp yarn is positioned above the upper surface side weft, and ○ indicates that the upper warp yarn is positioned below the lower surface weft. The mark ♦ indicates that the lower warp binding yarn is positioned above the upper surface side weft, and the symbol ◇ indicates that the lower warp binding yarn is positioned below the lower surface side weft.

  In the design drawing, the yarns are arranged so as to overlap with each other accurately, but this is for the convenience of the drawing and may be displaced in an actual fabric. In the design drawing, in the part of the lower warp binding yarn consisting of the upper warp and lower warp binding yarn or the upper warp binding yarn consisting of the lower warp and upper warp binding yarn Although it is a structure | tissue which forms the structure | tissue for one warp in a warp line on the upper surface side surface and the lower surface side surface, it may be arrange | positioned depending on the case.

  As for the wefts, there are some places where the lower surface side wefts are not arranged below the upper surface side wefts from the arrangement ratio. In the present specification, in the description of the weft forming a crimp on the surface, the warp binding yarn may be expressed as an upper surface side warp or a lower surface side warp for convenience. This is because the warp binding yarn functions as a warp forming a surface texture.

Example 1
FIG. 1 is a design diagram of a fabric of Example 1 of the present invention. The warp 1b is a set of upper warp binding yarns composed of a lower side warp and an upper warp binding yarn. The warp 3a is a set of lower warp binding yarns composed of an upper surface side warp and a lower warp binding yarn. , 4 is a set of upper and lower warps comprising an upper surface side warp and a lower surface side warp. The upper surface side wefts and the lower surface side wefts are arranged in a ratio of 2: 1, and the upper surface side surface is denser than the lower surface side surface.
There are two binding yarns out of four. Since the binding yarns are two, the knuckle height and the fabric density are uniform. The upper surface side warp is a 1 / 4-1 / 2 structure that passes over one upper surface side weft, above four upper surface side wefts, above one upper surface side weft, and below two upper surface side wefts. The upper surface side weft has a 1/3 structure passing under one upper surface side warp and above three upper surface side warps. And the lower surface side surface is a woven fabric structure in which two adjacent warps pass alternately above and below one lower surface side weft.
Since the fabric has both upper and lower warp binding yarns, even if the fabric is bent up and down, the binding yarn will float at the joint and the upper and lower layers of the fabric will loosen. No, and the upper warp binding yarn and the lower warp binding yarn are arranged at positions separated from each other, so that the surface height of the knuckle is uniform as a whole fabric without making a line in the longitudinal direction, Adhesion and freeness can also be made uniform.

(Example 2)
FIG. 2 is a design diagram of the fabric of Example 2 of the present invention. The arrangement of the upper and lower warp yarns, the upper warp yarns, the lower warp yarns, and the arrangement of the upper surface side wefts and the lower surface side wefts are the same as in the first embodiment.
The number of binding yarns is 4 out of 8, and the number of binding yarns is 4, but the knuckle height and the fabric density are uniform because they are dispersedly arranged. The upper surface side warp is a 1/3 structure passing over one upper surface side weft and under the three upper surface side wefts, and the upper surface side weft is under one upper surface side warp and three upper surface side warps. It is a 1/3 structure passing through and forms a twill structure as a woven fabric. The lower surface side surface is a structure in which the lower surface side wefts form a long crimp equivalent to six warps on the lower surface side surface, and is excellent in wear resistance. Further, since the lower surface side weft is woven by two adjacent lower surface side warps, the rigidity is excellent.
As in the previous example, there is no looseness of the upper and lower layers of the fabric and nonuniformity of the surface height of the knuckle, and adhesion and drainage can be made uniform.

(Example 3)
FIG. 3 is a design diagram of the fabric of Example 3 of the present invention. The arrangement of the upper and lower warp yarns, the upper warp yarns, the lower warp yarns, and the arrangement of the upper surface side wefts and the lower surface side wefts are the same as in the first embodiment.
The number of binding yarns is 4 out of 8, and the number of binding yarns is 4 while being dispersed, so the knuckle height and the fabric density are uniform. The upper surface side surface texture forms the same twill texture as in Example 2. And the lower surface side surface is the same texture as Example 1, and is excellent in rigidity and running stability.
As in the previous example, there is no looseness of the upper and lower layers of the fabric and nonuniformity of the surface height of the knuckle, and adhesion and drainage can be made uniform.

Example 4
FIG. 4 is a design diagram of a fabric of Example 4 of the present invention. The arrangement of the upper and lower warp, upper warp and lower warp bindings is the same as in Example 1, and the upper and lower wefts are arranged below all upper wefts. 1: 1 arrangement with lower side wefts.
The number of binding yarns is 4 out of 8, and the number of binding yarns is 4 while being dispersed, so the knuckle height and the fabric density are uniform. The upper surface side surface texture forms the same twill texture as in Example 2. The lower surface side surface is a structure in which the lower surface side wefts form a long crimp of three warps on the lower surface side surface, and is excellent in wear resistance.
Similar to Example 1, there is no looseness of the upper and lower layers of the fabric and nonuniformity of the surface height of the knuckle, and adhesion and drainage can be made uniform.

(Example 5)
FIG. 5 is a design diagram of a fabric of Example 5 of the present invention. Two sets of upper and lower warp yarns are arranged in succession, and an upper warp yarn binding yarn group and a lower warp yarn binding yarn group are arranged in succession. A similar 2: 1 arrangement.
The number of binding yarns is 4 out of 8, and the number of binding yarns is 4, but the knuckle height and the fabric density are uniform because they are dispersedly arranged. In Examples 1 to 4, the upper warp binding yarn group and the lower warp binding yarn group are arranged with one warp pair interposed therebetween, but the arrangement as in this embodiment may be used. The upper surface side warp is a 1/3 structure passing over one upper surface side weft and under the three upper surface side wefts, and the upper surface side weft is under one upper surface side warp and three upper surface side warps. It is a 1/3 structure passing through, forming a satin weave structure as a woven fabric. And the lower surface side surface is the same texture as Example 1, and is excellent in rigidity and running stability.
As in the previous example, there is no looseness of the upper and lower layers of the fabric and nonuniformity of the surface height of the knuckle, and adhesion and drainage can be made uniform.

(Example 6)
FIG. 6 is a design diagram of a fabric according to Example 6 of the present invention. In the previous embodiment, a pair of upper and lower warps consisting of an upper side warp and a lower side warp was arranged. However, in this example, there is no upper and lower warp pair, and an upper warp and lower warp set. This is a structure in which only pairs of yarns are alternately arranged. The upper surface side weft and the lower surface side weft have the same 2: 1 arrangement as in the first embodiment.
In this embodiment, the number of binding yarns is 8 out of 8 and there are no warp yarns. Even if it is such a structure, there is no problem, and the knuckle height and the fabric density become uniform as in the previous embodiment, and there is an effect of increasing the binding force.
The upper surface side surface structure forms the same 1 / 4-1 / 2 structure as in Example 1. And the lower surface side surface is a structure in which the same lower surface side weft as in Example 2 forms a long crimp for six warps, and is excellent in rigidity and running stability.
Similar to the previous example, there is no looseness of the upper and lower layers of the fabric and nonuniformity of the surface height of the knuckle, and the adhesion and drainage can be made uniform.

(Example 7)
FIG. 7 is a design diagram of a fabric according to Example 7 of the present invention. In the previous embodiment, the woven fabric is composed of 16 warps and 8 warps, but this embodiment is composed of 10 warps and 20 warps. As in Example 6, there is no upper and lower warp yarn group in this example, and only the upper warp yarn group and the lower warp yarn group are arranged alternately. The lower side wefts are arranged in the same 2: 1 as in the first embodiment.
Even if it is such a structure, there is no problem, and the knuckle height and the fabric density become uniform as in the previous embodiment, and there is an effect that the binding force is further improved.
The upper surface texture is above the upper surface weft and is below the four upper surface wefts. The upper surface weft is below one warp and then above the four warps. The 1/4 structure which passes through is formed. The lower surface side surface has a structure in which the lower surface side wefts form a long crimp equivalent to three warp yarns, and is tightly woven by two adjacent warp yarns, so that it has excellent rigidity and running stability.
Similar to the previous example, there is no looseness of the upper and lower layers of the fabric and nonuniformity of the surface height of the knuckle, and the adhesion and drainage can be made uniform.

(Example 8)
FIG. 8 is a design diagram of a fabric according to Example 8 of the present invention. In Example 7, the woven fabric was composed of 20 warps and 10 warps, but in this example, 12 warps and 24 warps were used. Then, a pair of upper warp binding yarns and a pair of lower warp binding yarns are arranged, and thereafter, two sets of upper and lower warp yarns are continuously arranged. The upper surface side wefts and the lower surface side wefts are arranged 1: 1 as in the fourth embodiment.
As described above, there is no problem even if the ratio of the binding yarn group and the upper and lower warp group is changed. As in the previous embodiment, the knuckle height and the fabric density are uniform.
The upper surface side texture is the same as in Example 3. The upper surface side weft is below the upper surface side weft by 1/3 structure passing above the upper surface side weft and below the upper surface side weft. And then a 1/3 texture is formed which passes over three warps. And the lower surface side surface is a structure in which the lower surface side wefts form a long crimp equivalent to three warps, and is excellent in rigidity and running stability.
As in the previous example, there is no looseness of the upper and lower layers of the fabric and nonuniformity of the surface height of the knuckle, and adhesion and drainage can be made uniform.

Example 9
FIG. 9 is a design diagram showing a fabric of Example 9 of the present invention. This example is composed of 12 sets of warps and 24 warps as in Example 8. The arrangement of the upper warp binding yarn group, the lower warp binding yarn group, and the upper and lower warp yarn groups is different from that of Example 8, and each group is alternately arranged. The upper surface side weft and the lower surface side weft have the same 2: 1 arrangement as in the first embodiment.
The upper surface side texture is the same as in Example 8. The upper surface side weft is below one warp, and the upper surface side weft is below one warp. And then a 1/3 texture is formed which passes over three warps. And the lower surface side surface is a structure in which the lower surface side wefts form a long crimp equivalent to three warps, and is excellent in rigidity and running stability.
As in the previous example, there is no looseness of the upper and lower layers of the fabric and nonuniformity of the surface height of the knuckle, and adhesion and drainage can be made uniform.

It is a design figure which shows the complete structure of Example 1 of this invention. It is a design figure which shows the complete structure of Example 2 of this invention. It is a design figure which shows the complete structure of Example 3 of this invention. It is a design figure which shows the complete structure of Example 4 of this invention. It is a design figure which shows the complete structure of Example 5 of this invention. It is a design figure which shows the complete structure of Example 6 of this invention. It is a design figure which shows the complete structure of Example 7 of this invention. It is a design figure which shows the complete structure of Example 8 of this invention. It is a design figure which shows the complete structure of Example 9 of this invention. 2 is a cross-sectional view of a set of warp binding yarns of Cited Reference 1. It is sectional drawing of the group of the warp binding yarn when the textile fabric of the cited reference 2 is bent below.

Explanation of symbols

1, 2, 3, ... 12 Upper / lower warp, upper warp, or lower warp 1 ', 2' ... 20 'Upper side weft, Lower side weft

Claims (7)

The upper warp binding yarn is a set of upper warp binding yarns that are arranged on the upper surface side warp and the lower warp binding yarns that are arranged substantially vertically. In the two-layer industrial fabric, the upper warp binding yarn does not pass the upper side of the upper weft that should pass through the fabric structure, and the lower warp binding yarn in the pair Passing over the weft, forming a structure for one warp on the upper surface side surface, the lower warp binding yarn and the lower surface side weft are interwoven to form a structure for one warp on the lower surface side, In the upper warp binding yarn set, the lower side warp does not pass below the lower side weft that should pass through the fabric structure, and the upper warp binding yarn that passes through the lower side weft passes below the lower side weft. A structure for one warp is formed on the surface, the upper warp and the upper surface side weft are interwoven to form a structure for one warp on the upper surface, and in the complete structure, Serial on through binding yarn pairs and industrial two-layer fabric, wherein the a pair of the lower through binding yarn is present the one or more sets. The industrial double-layer fabric according to claim 1, wherein warp constituting the fabric is only the set of the lower warp binding yarn and the set of the upper warp binding yarn. The warp constituting the woven fabric is a set of the lower warp binding yarn, the set of the upper warp binding yarn, and a set of upper and lower warp yarns in which the upper surface side warp and the lower surface side warp are arranged vertically. Item 2. The industrial double-layer fabric according to Item 1. The industrial two-layer fabric according to any one of claims 1 to 3, wherein the pair of lower warp binding yarns and the pair of upper warp binding yarns are alternately arranged one by one. The industrial two-layer woven fabric according to any one of claims 1 to 4, wherein the lower warp binding yarn group and the upper warp binding yarn group are uniformly arranged at the same ratio. The industrial double-layer fabric according to any one of claims 1 to 5, wherein all warps constituting the fabric have the same wire diameter. The industrial double-layered fabric according to any one of claims 1 to 6, wherein the structure of the upper surface side layer is any one of a twill weave, a broken twill weave, a satin weave, and a plain weave.

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