Fiber structure, shoe, garment, bag, and method for manufacturing fiber structure

Abstract

To provide a fiber structure or the like which enriches functionality in a lamination direction, is lightweight and highly reliable, and is easily manufactured.SOLUTION: The fiber structure is at least partially provided with a layer structure having a first fiber layer, a second fiber layer, and a third fiber layer arranged in parallel, a first suspension layer formed by bridging a weaving yarn or a knitting yarn between the first fiber layer and the second fiber layer, and a second suspension layer formed by bridging a weaving yarn or a knitting yarn between the second fiber layer and the third fiber layer. Such a fiber structure can be used as a material for shoes, clothing, bags and the like, which are particularly required to have various functionalities.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a textile structure, shoes, clothing, a bag, and a method for manufacturing the textile structure. [Background technology]

[0002] In the footwear industry, a fiber structure called double Russell mesh, which has a surface layer, a lining layer, and an intermediate layer in which the two layers are bonded together with thread, is sometimes used for the upper of shoes. The intermediate layer of the double Russell mesh allows the formation of a layer with functionality such as shock absorption. Such fiber structures are not limited to shoes, but are also used in a variety of applications, such as vehicle seats (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Utility Model Application Publication No. 6-26700 [Patent Document 2] Japanese Patent Application Publication No. 2019-15106 Summary of the Invention [Problem to be solved by the invention]

[0004] Because double Russell mesh is formed from a single layer as described above, it has been difficult to layer functional layers in shoes, such as layering an outer layer with enhanced resilience against external impacts on top of an inner layer with enhanced shock absorption that comes into contact with the foot. Patent Document 2, while not an example of shoes, discloses a sound-absorbing material in which three-dimensional knitted fabrics including a top layer, a bottom layer, and an intermediate layer in which the top and bottom layers are bonded together with yarn are stacked using an adhesive. Based on this example, it is conceivable to layer double Russell mesh with an adhesive, but this would pose problems such as increased weight due to the adhesive, concerns about peeling, and a complicated manufacturing process.

[0005] The present disclosure has been made to solve such problems, and provides a fiber structure and the like that is laminated with functional layers and is lightweight, highly reliable, and easy to manufacture. [Means for solving the problem]

[0006] The fiber structure according to the first aspect of the present disclosure at least partially comprises a layer structure having a first fiber layer, a second fiber layer, and a third fiber layer arranged in parallel, a first suspension layer formed by suspending a woven or knitted yarn between the first and second fiber layers, and a second suspension layer formed by suspending a woven or knitted yarn between the second and third fiber layers.

[0007] A shoe according to a second aspect of the present disclosure is a shoe that employs the above-described fiber structure.

[0008] A garment according to a third aspect of the present disclosure is a garment that employs the above-described fiber structure.

[0009] A bag according to a fourth aspect of the present disclosure is a bag that employs the above-described fiber structure.

[0010] A method for manufacturing a fiber structure according to a fifth aspect of the present disclosure includes a planar layer forming step of forming a first fiber layer, a second fiber layer, and a third fiber layer, and a suspension layer forming step of forming a first suspension layer by bridging a woven or knitted yarn between the first fiber layer and the second fiber layer, and forming a second suspension layer by bridging a woven or knitted yarn between the second fiber layer and the third fiber layer.

[0011] A method for manufacturing a fiber structure according to a sixth aspect of the present disclosure includes an outer layer forming step for forming a first fiber layer and a third fiber layer, and an inner layer forming step for forming a second fiber layer by having the woven or knitted yarn unwound from the first fiber layer toward the third fiber layer and the woven or knitted yarn unwound from the third fiber layer toward the first fiber layer cross each other between the first fiber layer and the third fiber layer, while forming a first suspension layer by having the woven or knitted yarn unwound from the first fiber layer return to the first fiber layer through the second fiber layer, and forming the second suspension layer by having the woven or knitted yarn unwound from the third fiber layer return to the first fiber layer through the second fiber layer. [Effects of the Invention]

[0012] The present disclosure makes it possible to provide a fiber structure or the like that is laminated with functional layers and is lightweight, highly reliable, and easy to manufacture. [Brief explanation of the drawings]

[0013] [Figure 1] FIG. 1 is a perspective view schematically illustrating a partially cut-out fiber structure according to an embodiment of the present invention. [Figure 2] FIG. 1 is a simplified diagram illustrating a cross section of a fiber structure according to a first example. [Figure 3] FIG. 10 is a simplified diagram showing a cross section of a fiber structure according to a second example. [Figure 4] FIG. 10 is a simplified diagram showing a cross section of a fiber structure according to a third example. [Figure 5] FIG. 10 is a simplified diagram showing a cross section of a fiber structure according to a fourth example. [Figure 6] FIG. 10 is a simplified diagram showing a cross section of a fiber structure according to a fifth example. [Figure 7] FIG. 1 is a diagram simply illustrating a first method for producing a fiber structure. [Figure 8] FIG. 2 is a diagram simply illustrating a second method for producing a fiber structure. [Figure 9] 10A and 10B are diagrams showing examples of fiber structures having a multilayer structure. [Figure 10] FIG. 1 is a diagram showing an example of a fiber structure partially having a multilayer structure. [Figure 11] FIG. 1 is a front view of a fiber structure used in clothing. [Figure 12] FIG. 10 is a rear view of the fiber structure used in clothing. DETAILED DESCRIPTION OF THE INVENTION

[0014] The present invention will be described below through embodiments of the invention, but the invention according to the claims is not limited to the following embodiments. Furthermore, not all of the configurations described in the embodiments are necessarily essential as means for solving the problems. In each drawing, components with the same reference numerals have the same or similar configurations.

[0015] FIG. 1 is a perspective view showing a partially cut-out schematic of a fiber structure 100 according to the present embodiment. The fiber structure 100 according to the present embodiment includes a first fiber layer 110, a second fiber layer 120, and a third fiber layer 130 arranged in parallel, a first suspension layer 140 formed by suspending a yarn between the first fiber layer 110 and the second fiber layer 120, and a second suspension layer 150 formed by suspending a yarn between the second fiber layer 120 and the third fiber layer 130. The first fiber layer 110, the second fiber layer 120, and the third fiber layer 130 may be knitted fabric layers formed by knitting a knitting yarn while entangling it in a loop shape, or may be woven fabric layers formed by weaving a weaving yarn consisting of warp yarns and weft yarns while crossing them. Similarly, the first suspension layer 140 and the second suspension layer 150 may be knitted fabric layers formed by knitting, or may be woven fabric layers formed by weaving. In the following description, for convenience, each layer will be described as a knitted fabric layer formed by knitting knitting yarn.

[0016] The first suspension layer 140 formed between the first fiber layer 110 and the second fiber layer 120 has a higher air permeability than the first fiber layer 110 and the second fiber layer 120, respectively. In other words, the first fiber layer 110 and the second fiber layer 120 are knitted more densely than the first suspension layer 140. Here, air permeability represents the proportion of yarns occupying a unit space (in other words, "yarn density"). When a large number of yarns occupy a unit space, the air permeability is low (the yarn density is high), and conversely, the air permeability is high (the yarn density is low). Similarly, the second suspension layer 150 formed between the second fiber layer 120 and the third fiber layer 130 has a higher air permeability than the second fiber layer 120 and the third fiber layer 130, respectively. In other words, the second fiber layer 120 and the third fiber layer 130 are knitted more densely than the second suspension layer 150. With this layer structure, the first fiber layer 110, the second fiber layer 120, and the third fiber layer 130, which are arranged parallel to each other, mainly function to maintain strength in the planar direction, while the first suspension layer 140 and the second suspension layer 150 mainly function to provide cushioning and resilience required in the layer direction.

[0017] In this embodiment, as shown in the figure, the planar directions of the first fiber layer 110, the second fiber layer 120, and the third fiber layer 130, which are arranged parallel to one another, are defined as the XY directions, and the direction perpendicular to each planar direction is defined as the Z-axis direction. In this embodiment, the Z-axis direction may also be referred to as the layer direction.

[0018] In this embodiment, various properties can be imparted to the fiber structure 100 by devising the layer structures of the first suspension layer 140 and the second suspension layer 150. Therefore, the layer structures of the first suspension layer 140 and the second suspension layer 150 will be described through several examples of the fiber structure 100.

[0019] 2 is a simplified diagram showing a cross section of a fiber structure 100 according to a first embodiment. The first suspension layer 140 and the second suspension layer 150 in the first embodiment have the same layer structure. That is, the thickness of the first suspension layer 140, i.e., the distance between the first fiber layer 110 and the second fiber layer 120, is the same as the thickness of the second suspension layer 150, i.e., the distance between the second fiber layer 120 and the third fiber layer 130, and the knitting yarns forming the first suspension layer 140 and the second suspension layer 150 are also the same, and the knitting methods are also the same.

[0020] By forming suspension layers of the same structure in this way, it is possible to improve the desired functionality (for example, cushioning) that would be insufficient with a single layer.

[0021] Of course, the layer structures of the first suspension layer 140 and the second suspension layer 150 can be made different from each other depending on the functionality to be imparted. Fig. 3 is a simplified diagram showing a cross section of a fiber structure 100 according to a second embodiment.

[0022] The fiber structure 100 according to the second embodiment differs from the fiber structure 100 according to the first embodiment in that the thickness of the first suspension layer 140 (the distance between the first fiber layer 110 and the second fiber layer 120) is different from the thickness of the second suspension layer 150 (the distance between the second fiber layer 120 and the third fiber layer 130). By varying the thickness of each suspension layer in this manner, the functionality of each layer can be differentiated. When the thickness of the first suspension layer 140 is greater than the thickness of the second suspension layer 150 as shown in the figure, the first suspension layer 140 has higher impact absorption than the second suspension layer 150; in other words, the second suspension layer 150 has higher resilience than the first suspension layer 140. This layer structure is suitable, for example, for use as an upper material for shoes in which the first fiber layer 110 side is the inner side and the third fiber layer 130 side is the outer side. Furthermore, by varying the thickness in this way, it is possible to control, for example, the speed of impact absorption time at the time of ground contact. For example, when a fiber structure 100 in which the hardness of the second suspension layer 150, which is thinner, is low and the hardness of the first suspension layer 140, which is thicker, is high, is used as a sole material (typically an insole), it is possible to shorten the time the user feels soft and lengthen the time they feel resilience.

[0023] FIG. 4 is a simplified diagram showing a cross section of a textile structure 100 according to a third embodiment. The textile structure 100 according to the third embodiment differs from the textile structure 100 according to the first embodiment in that the material of the knitting yarn forming the first suspension layer 140 is different from the material of the knitting yarn forming the second suspension layer 150. In the example shown, the knitting yarn forming the second suspension layer 150 is thicker than the knitting yarn forming the first suspension layer 140. By using different materials for the knitting yarns forming each suspension layer in this way, the functionality of the first suspension layer 140 and the second suspension layer 150 can be made different. In addition to thickness, the material of the knitting yarns can also be made different in terms of quality (silk yarn, cotton yarn, synthetic fiber, etc.) and twisted yarn (monofilament, multifilament, etc.).

[0024] 5 is a simplified diagram illustrating a cross section of a fiber structure 100 according to a fourth embodiment. The fiber structure 100 according to the fourth embodiment differs from the fiber structure 100 according to the first embodiment in that the air permeability of the first suspension layer 140 and the air permeability of the second suspension layer 150 are different from each other. In other words, the spacing in the planar direction when the yarns of the first suspension layer 140 are draped over the first fiber layer 110 and the second fiber layer 120 is different from the spacing in the planar direction when the yarns of the second suspension layer 150 are draped over the second fiber layer 120 and the third fiber layer 130. In the illustrated example, the second suspension layer 150 is knitted more loosely than the first suspension layer 140, thereby making the air permeability of the second suspension layer 150 greater than that of the first suspension layer 140. With such a layer structure, the second suspension layer 150 has higher shock absorption properties than the first suspension layer 140, and conversely, the first suspension layer 140 has higher resilience than the second suspension layer 150.

[0025] 6 is a simplified diagram showing a cross section of a fiber structure 100 according to Example 5. The fiber structure 100 according to Example 5 mainly includes a first region 101 and a second region 102 in which a second suspension layer 150 is divided in the plane direction, and differs from the fiber structure 100 according to Example 1 in that the layer structure in the first region 101 and the layer structure in the second region 102 are different from each other.

[0026] In the illustrated example, during the process of forming the second suspension layer 150, the spacing in the planar direction when the yarns of the second suspension layer 150 are woven across the second fiber layer 120 and the third fiber layer 130 at the boundary between the first region 101 and the second region 102 is changed, and the second region 102 is knitted more loosely than the first region 101, thereby making the breathability of the second region 102 greater than that of the first region 101. By differentiating the layer structure between the regions separated in the planar direction in this way, it is possible to provide an upper with, for example, high resilience in the heel region and high shock absorption in the instep region. It is also possible to provide an upper with high resilience in the heel region and high shock absorption around the ankle region.

[0027] As described above, the layer structure of the first region 101 and the second region 102 may be made of different materials or have different thicknesses. Furthermore, the regions separated in the plane direction are not limited to the first region 101 and the second region 102, and may be three or more regions.

[0028] In addition, in the illustrated example, the second suspension layer 150 is divided into the first region 101 and the second region 102 to form layer structures that are different from each other, but the first suspension layer 140 may be divided into the first region 101 and the second region 102 to form layer structures that are different from each other. Also, both the first suspension layer 140 and the second suspension layer 150 may be divided into the first region 101 and the second region 102, respectively, to form layer structures that are different from each other, and in this case, the division of the first region 101 and the second region 102 in the first suspension layer 140 in the plane direction does not have to match the division of the first region 101 and the second region 102 in the plane direction in the second suspension layer 150.

[0029] The features of the layer structures according to the second to fifth embodiments described above can be combined with each other. For example, when combining the features of the layer structure of the second embodiment with the features of the layer structure of the third embodiment, the thicknesses of the first suspension layer 140 and the second suspension layer 150 may be made different, and the material of the knitting yarn forming the first suspension layer 140 and the material of the knitting yarn forming the second suspension layer 150 may be made different.

[0030] Next, a description will be given of a method for manufacturing the fiber structure 100. In this embodiment, a first manufacturing method and a second manufacturing method, which differ in the method for forming the second fiber layer 120, will be described.

[0031] 7 is a simplified diagram showing a first manufacturing method of the fiber structure 100. In the figure, the outline arrow indicates the direction in which the fiber structure 100 is manufactured (the positive direction of the X-axis). For simplification, the first suspension layer 140 and the second suspension layer 150 are each represented by two knitting yarns (a first yarn 141 and a second yarn 142 forming the first suspension layer 140, and a third yarn 151 and a fourth yarn 152 forming the second suspension layer 150). The number of knitting yarns in the first suspension layer 140 and the second suspension layer 150 may be one or three or more.

[0032] The first manufacturing method includes a planar layer forming step of forming a first fiber layer 110, a second fiber layer 120, and a third fiber layer 130, and a suspension layer forming step of forming a first suspension layer 140 and a second suspension layer 150, and the planar layer forming step and the suspension layer forming step are performed simultaneously. More specifically, the first fiber layer 110, the second fiber layer 120, and the third fiber layer 130 are sequentially stretched in the positive direction of the X-axis through the planar layer forming step. The first suspension layer 140 is formed through the suspension layer forming step in which the first yarn 141 and the second yarn 142 are respectively suspended out of phase between the first fiber layer 110 and the second fiber layer 120, which are formed with a slight lead in the planar layer forming step, and sequentially stretched in the positive direction of the X-axis. Similarly, the second suspension layer 150 is formed by a suspension layer formation step in which the third yarn 151 and the fourth yarn 152 are respectively suspended out of phase between the second fiber layer 120 and the third fiber layer 130, which are formed with a slight lead in the planar layer formation step, and sequentially extend in the positive direction of the X-axis.

[0033] Alternatively, the first fiber layer 110, the second fiber layer 120, and the first suspension layer 140 may be formed first, followed by the third fiber layer 130 and the second suspension layer 150. In this case, the third yarn 151 and the fourth yarn 152 forming the second suspension layer 150 are bridged between the already formed second fiber layer 120 and the third fiber layer 130 formed slightly ahead of the second suspension layer 150.

[0034] 8 is a simplified diagram showing the second manufacturing method of the fiber structure 100. In the figure, the outline arrow indicates the direction in which the fiber structure 100 is manufactured (the positive direction of the X-axis). For simplification, the first suspension layer 140 and the second suspension layer 150 are each represented by two knitting yarns (a first yarn 141 and a second yarn 142 that form the first suspension layer 140, and a third yarn 151 and a fourth yarn 152 that form the second suspension layer 150). The number of knitting yarns in the first suspension layer 140 and the second suspension layer 150 may be one or three or more.

[0035] In the second manufacturing method, an outer layer forming step of forming the first fiber layer 110 and the third fiber layer 130 is performed, and a first yarn 141 and a second yarn 142 are unwound from the first fiber layer 110 toward the third fiber layer 130, and a third yarn 151 and a fourth yarn 152 are unwound from the third fiber layer 130 toward the first fiber layer 110, and the first fiber layer 110 and the third fiber layer 130 are unwound. The method includes an inner layer forming step in which a second fiber layer 120 is formed using at least two or more knitting yarns in a planar direction parallel to the layer 130, a first suspension layer 140 is formed by having a first yarn 141 and a second yarn 142 pass through the second fiber layer 120 and return to the first fiber layer 110, and a second suspension layer 150 is formed by having a third yarn 151 and a fourth yarn 152 pass through the second fiber layer 120 and return to the third fiber layer 130, and these outer layer forming step and inner layer forming step are carried out simultaneously. Note that here, the first fiber layer 110 and the third fiber layer 130 are referred to as outer layers, and the first suspension layer 140, the second suspension layer, and the second fiber layer are referred to as inner layers.

[0036] More specifically, the first fiber layer 110 and the third fiber layer 130 are sequentially stretched in the positive direction of the X-axis by the outer layer forming step. The first yarn 141 and the second yarn 142, which are entangled with a phase difference in the first fiber layer 110 formed with a slight lead by the outer layer forming step, are unwound toward the third fiber layer 130. The third yarn 151 and the fourth yarn 152, which are entangled with a phase difference in the third fiber layer 130 formed with a slight lead by the outer layer forming step, are unwound toward the first fiber layer 110. The first yarn 141, the second yarn 142, and the third yarn 151 and the fourth yarn 152 cross each other between (for example, in the middle of) the first fiber layer 110 and the third fiber layer 130. In this embodiment, the first thread 141 intersects with the third thread 151, and the second thread 142 intersects with the fourth thread 152. The first thread 141 may intersect with the fourth thread 152, or may intersect with both the third thread 151 and the fourth thread 152. Furthermore, the first thread 141, the second thread 142, the third thread 151, and the fourth thread 152 may intersect with one another.

[0037] Each of the crossed yarns is let out in the surface direction by a small length to form the second fiber layer 120 between the first fiber layer 110 and the third fiber layer 130. At this time, the first yarn 141 and the second yarn 142 reach the side of the second fiber layer to be formed that faces the third fiber layer 130, and then are folded back toward the first fiber layer 110 to form the first suspension layer 140. Similarly, the third yarn 151 and the fourth yarn 152 reach the side of the second fiber layer to be formed that faces the first fiber layer 110, and then are folded back toward the third fiber layer 130 to form the second suspension layer 150.

[0038] In this way, the inner layer forming step of forming the inner layer is repeatedly performed in synchronization with the outer layer forming step described above, thereby manufacturing the fiber structure 100. Note that the second fiber layer 120 is not limited to being composed of the first yarns 141 and second yarns 142 that form the first suspension layer 140 and the first yarns 141 and second yarns 142 that form the second suspension layer 150, and reinforcing yarns may be woven into the second fiber layer 120 to form it more densely or to make it easier for the yarns to intertwine with each other. When the first suspension layer 140 is composed of one yarn and the second suspension layer 150 is composed of one yarn, the second fiber layer 120 can be formed of two yarns.

[0039] Next, we will explain modified examples of the fiber structure 100. Fig. 9 is a diagram showing an example of the fiber structure 100 having a further multi-layer structure.

[0040] The layer structure of the fiber structure 100 described so far has three fiber layers (first fiber layer 110, second fiber layer 120, third fiber layer 130) and two suspension layers (first suspension layer 140, second suspension layer 150) formed between them. However, if more diverse functionality is to be imparted in the layer direction, the layer structure can be constructed with more layers.

[0041] The illustrated fiber structure 100 further includes a fourth fiber layer 160 and a fifth fiber layer 170 in addition to the first fiber layer 110, the second fiber layer 120, and the third fiber layer 130. A third suspension layer 180 similar to the first suspension layer 140 is formed between the third fiber layer 130 and the fourth fiber layer 160, and a fourth suspension layer 190 similar to the second suspension layer 150 is formed between the fourth fiber layer 160 and the fifth fiber layer 170. The layer structure of each suspension layer can be designed according to the desired functionality, and the layer structures may be different from each other. The structure of each fiber layer may also be different from each other; for example, the outer layer may be particularly thick.

[0042] FIG. 10 is a diagram showing an example of a textile structure 100 partially having a multilayer structure. The textile structure 100 has the above-described multilayer structure in a multilayer region 103. The transition region 104 is an intermediate region between the multilayer region 103 and the single-layer region 105, where the multilayer structure is gradually eliminated. In the single-layer region 105, the textile structure 100 does not have the first suspension layer 140 and the second suspension layer 150 of the multilayer region 103, and instead has a single-layer structure, i.e., a fiber layer 210 in which the first fiber layer 110, the second fiber layer 120, and the third fiber layer 130 are integrated. The textile structure 100 having such a single-layer structure and a multilayer structure can be suitably employed, for example, in applications where there are both areas in the layer direction where functionality is desired and areas where thickness needs to be reduced.

[0043] FIG. 11 is a front view of the fiber structure 100 used in a portion of the garment 200. FIG. 12 is a back view of the fiber structure 100 used in a portion of the garment 200. When the fiber structure 100 is used in the garment 200, it can be arranged in a specific region 243 of the garment 200 as shown in FIGS. 11 and 12. For example, for the structure 100 used in the buttocks or shins of the garment 200, it is preferable that the hardness of the inner suspension layer (the side closest to the body) is lower than that of the outer suspension layer. Furthermore, for example, for the structure 100 used in the chest or hip joints of the garment 200, it is preferable that the tensile stress and bending rigidity of the inner suspension layer are lower than those of the outer suspension layer. Of course, the entire body may be formed from the fiber structure 100 by joining together fiber structures 100 selected according to the characteristics of each region of the garment 200.

[0044] In the above-described embodiments, the textile structure 100 has been described assuming that it is mainly used in shoe uppers and clothing, but the applications to which the textile structure 100 is applied are not limited to these. The textile structure 100 can be suitably employed in any application requiring various functions in the layer direction. For example, the textile structure 100 can be suitably employed in shoe sponges, tongues, insoles, and sock linings. The textile structure 100 can also be suitably employed in bags, hats, clothing accessories, and other textile materials. [Explanation of symbols]

[0045] 100... fiber structure, 101... first region, 102... second region, 110... first fiber layer, 120... second fiber layer, 130... third fiber layer, 140... first suspension layer, 141... first yarn, 142... second yarn, 150... second suspension layer, 151... third yarn, 152... fourth yarn, 160... fourth fiber layer, 170... fifth fiber layer, 180... third suspension layer, 190... fourth suspension layer, 200... garment, 243... part

Claims

1. a first fiber layer, a second fiber layer, and a third fiber layer arranged in parallel; a first suspension layer formed by bridging a weaving yarn or a knitting yarn between the first fiber layer and the second fiber layer; a second suspension layer formed by bridging a woven yarn or a knitted yarn between the second fiber layer and the third fiber layer; A fiber structure having at least a layer structure having the following structure in at least a portion thereof.

2. The fiber structure according to claim 1 , wherein the first fiber layer, the second fiber layer, and the third fiber layer are knitted or woven.

3. The fiber structure described in claim 1, wherein the first suspension layer has a higher air permeability than both the first fiber layer and the second fiber layer, and the second suspension layer has a higher air permeability than both the second fiber layer and the third fiber layer.

4. The fiber structure according to claim 1 , wherein the layer structure of the first suspension layer and the layer structure of the second suspension layer are different from each other.

5. The fiber structure according to claim 4 , wherein the thickness of the first suspension layer and the thickness of the second suspension layer are different from each other.

6. The fiber structure according to claim 4 , wherein the material of the woven or knitted yarn of the first suspension layer is different from the material of the woven or knitted yarn of the second suspension layer.

7. The fiber structure according to claim 4 , wherein the first suspension layer and the second suspension layer have different air permeabilities.

8. The fiber structure described in claim 1, wherein at least one of the first suspension layer and the second suspension layer includes a first region and a second region separated in the planar direction, and the layer structure in the first region and the layer structure in the second region are different from each other.

9. The fiber structure described in claim 1, wherein the woven or knitted yarns of the first suspension layer reach the side of the second fiber layer facing the third fiber layer and are folded back, and the woven or knitted yarns of the second suspension layer reach the side of the second fiber layer facing the first fiber layer and are folded back.

10. The fiber structure according to claim 9 , wherein the second fiber layer is formed including folded portions of the woven or knitted yarns of the first suspension layer and the woven or knitted yarns of the second suspension layer.

11. The fiber structure according to claim 9 , wherein the second fiber layer is formed by the woven or knitted yarn of the first suspension layer and the woven or knitted yarn of the second suspension layer.

12. A shoe employing the fiber structure according to any one of claims 1 to 11.

13. A garment comprising the fiber structure according to any one of claims 1 to 11.

14. A bag employing the fiber structure according to any one of claims 1 to 11.

15. a planar layer forming step of forming a first fiber layer, a second fiber layer, and a third fiber layer; a suspension layer forming step of forming a first suspension layer by bridging a woven yarn or a knitted yarn between the first fiber layer and the second fiber layer, and forming a second suspension layer by bridging a woven yarn or a knitted yarn between the second fiber layer and the third fiber layer; A method for producing a fiber structure having the above structure.

16. an outer layer forming step of forming a first fiber layer and a third fiber layer; an inner layer forming step in which a woven or knitted yarn unwound from the first fiber layer toward the third fiber layer and a woven or knitted yarn unwound from the third fiber layer toward the first fiber layer cross each other between the first fiber layer and the third fiber layer to form a second fiber layer, a woven or knitted yarn unwound from the first fiber layer returns to the first fiber layer through the second fiber layer to form a first suspension layer, and a woven or knitted yarn unwound from the third fiber layer returns to the first fiber layer through the second fiber layer to form a second suspension layer; A method for producing a fiber structure having the above structure.

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