JP2017089053A - Fiber structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fiber structure that enables the fiber structure in two axis orientation to be easily manufactured.SOLUTION: A first laminate 13 and a second laminate 20 are disposed in a fiber structure 10 so that a yarn main axial direction of a first reinforced fiber yarn 11 and a second reinforced fiber yarn 21 is orthogonal to that of a first auxiliary yarn 12 and a second auxiliary yarn 22. The first laminate 13 and the second laminate 20 are connected in a lamination direction by engaging a first intermediate structure yarn 16 of the first laminate 13 with a second intermediate structure yarn 26 of the second laminate 20.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a fiber structure in which a plurality of laminated bodies are arranged in a state in which the main fiber directions of reinforcing fiber yarns and auxiliary yarns are orthogonal to each other.

  A fiber reinforced composite material is used as a lightweight, high-strength material. The fiber-reinforced composite material is preferable as a structural component because the mechanical properties (mechanical properties) are improved as compared with the matrix itself when the reinforcing fibers are compounded in a matrix of resin or metal. In particular, the use of a resin as the matrix is preferable because the structural parts can be reduced in weight.

  As a fiber structure used as a base material for a fiber reinforced composite material, the main axis direction of the reinforced fiber yarn extends in two directions of 0 ° and 90 °, and the mechanical properties in two directions when the fiber reinforced composite material is used. There is something that enhances. A biaxially oriented fiber structure of 0 degree and 90 degrees may be manufactured by laminating fiber layers in which reinforced fiber yarns are uniaxially oriented so that the principal axis directions of the reinforcing fiber yarns are orthogonal to each other. .

  As a fiber layer in which reinforcing fiber yarns are uniaxially oriented, for example, there is a woven fabric substrate disclosed in Patent Document 1. This textile base material is configured by laminating two fiber layers, and each fiber layer is composed of a plurality of reinforcing fiber warps arranged parallel to each other in one direction and a reinforcing fiber warp adjacent in the arrangement direction. And auxiliary yarns extending in the same direction as the warp yarns for reinforcing fibers. Further, in the different fiber layers, the warp yarns for reinforcing fibers extend in the same direction and are shifted in the arrangement direction in a state where a part of the warp yarns overlaps. In one fiber layer, the warp yarns for reinforcing fibers and the auxiliary yarns are bonded together by an in-layer texture yarn. And fiber layers are couple | bonded by intermediate structure yarn, and the uniaxially-oriented textile base material is comprised.

  And when manufacturing the biaxially oriented fiber structure by laminating the textile base material disclosed in Patent Document 1, another textile base is used with respect to the yarn principal axis direction of the reinforcing fiber warp of one textile base material. The yarn principal axis directions of the warp yarns for reinforcing fibers of the material are orthogonal to each other, and the woven base materials are bonded with a bonding yarn separately prepared in the lamination direction. As a result, in the manufactured fiber structure, the yarn principal axis direction of the warp yarn for reinforcing fiber extends in two directions of 0 degree and 90 degrees, resulting in a biaxial orientation.

JP 2013-133555 A

  However, to produce a biaxially oriented fiber structure of 0 ° and 90 °, at least two woven substrates must be manufactured, and these woven substrates must be bonded with different yarns, and the lamination direction It takes a lot of time to bond to and increases the manufacturing cost.

  This invention is made | formed in view of the said problem, The objective is to provide the fiber structure which can manufacture the fiber structure of a biaxial orientation easily.

  The fiber structure for solving the above-mentioned problem is a laminate of a plurality of fiber layers in which reinforcing fiber yarns and auxiliary yarns are alternately arranged, and the reinforcing fiber yarns and auxiliary yarns are bonded in the arrangement direction by inter-layer tissue yarns. A plurality of laminated bodies, each of the laminated bodies has the same fiber principal axis direction of the reinforcing fiber yarns and the auxiliary yarns of the plurality of fiber layers, and the reinforcing fiber yarns in the lamination direction of the fiber layers. An intermediate structure in which the auxiliary yarns are relatively displaced in a state in which they overlap each other, the auxiliary yarns are relatively displaced, and the fiber layers are engaged with the auxiliary yarns located at both ends in the stacking direction. The plurality of laminates that are joined by yarns are arranged in a state in which the yarn principal axis directions of the reinforcing fiber yarns and the auxiliary yarns are orthogonal to each other, and the yarn principal axis direction extends in one direction. The inner layer of the body The laminates are laminated in the lamination direction by engagement of at least one of the yarn and the intermediate texture yarn and at least one of the in-layer texture yarn and the intermediate texture yarn of the laminate that extends in the yarn main axis direction in the other direction. The gist of this is that

  According to this, the plurality of laminates are bonded in the stacking direction using at least one of the in-layer texture yarns and the intermediate texture yarns that form the bonded structure of the laminates. Therefore, when manufacturing a laminated body with a loom, by controlling at least one method of feeding the inter-layer texture yarn and the intermediate texture yarn, the laminates are bonded in the stacking direction as the laminate is manufactured. it can. Therefore, for example, after manufacturing a laminated body, compared with the case where several laminated bodies are couple | bonded in a lamination direction with another thread | yarn in another process, manufacture of a fiber structure becomes easy.

  Further, with respect to the fiber structure, due to the engagement of the intermediate structure yarn of the laminate that extends in one direction with the yarn main axis direction and the intermediate structure yarn of the laminate with the yarn main axis direction extending in the other direction, The laminates may be bonded together.

According to this, in each laminate, the laminates can be joined in the lamination direction while the fiber layers are joined in the lamination direction by the intermediate texture yarn.
Further, with respect to the fiber structure, due to the engagement between the in-layer tissue yarn of the laminate extending in one direction in the yarn main axis direction and the in-layer tissue yarn of the laminate extending in the other direction in the yarn main axis direction. The laminates may be bonded to each other.

According to this, the laminated bodies can be bonded using the in-layer tissue yarns of the fiber layers adjacent in the stacking direction, and the bonding between the stacked bodies can be strengthened.
Further, with respect to the fiber structure, the intermediate structure yarn of the laminate extending in one direction in the yarn main axis direction and the intermediate structure yarn of the laminate extending in the other direction in the yarn main axis direction, and one The laminates are coupled to each other by engagement of the tissue yarns in the layer of the laminate extending in the direction of the yarn main axis and the yarns of the layer of the laminate extending in the other direction of the yarn main axis. It may be.

  According to this, the coupling | bonding of laminated bodies can be strengthened by two types of engagement, the engagement of intermediate | middle tissue yarns, and the engagement of in-layer tissue yarns.

  According to the present invention, a biaxially oriented fiber structure can be easily manufactured.

The fragmentary perspective view which shows typically the fiber structure of 1st Embodiment. The 2-2 sectional view taken on the line of FIG. 1 which shows the fiber structure of 1st Embodiment partially. FIG. 3 is a cross-sectional view taken along line 3-3 in FIG. 1 partially showing the fiber structure according to the first embodiment. The front view which shows partially the fiber structure of 1st Embodiment. The fragmentary perspective view which shows typically the fiber structure of 2nd Embodiment. FIG. 6 is a cross-sectional view taken along line 6-6 in FIG. 5 partially showing the fiber structure according to the second embodiment. FIG. 7 is a cross-sectional view taken along a line 7-7 in FIG. 5 partially showing the fiber structure according to the second embodiment. The front view which shows partially the fiber structure of 2nd Embodiment. The fragmentary perspective view which shows typically the fiber structure of 3rd Embodiment. FIG. 10 is a cross-sectional view taken along line 10-10 in FIG. 9 partially showing a fiber structure according to a third embodiment. FIG. 11 is a cross-sectional view taken along a line 11-11 in FIG. 9 partially showing a fiber structure according to a third embodiment. The front view which shows the fiber structure of 3rd Embodiment partially.

(First embodiment)
Hereinafter, a first embodiment in which a fiber structure is embodied will be described with reference to FIGS.
As shown in FIGS. 1 to 3, the fiber structure 10 includes a first laminated body 13 and a second laminated body 20 that are laminated, and the first laminated body 13 and the second laminated body 20 are bonded in the lamination direction. Configured.

The first laminated body 13 is a laminated body of two first fiber layers 14, and has a structure in which two first fiber layers 14 are bonded in the stacking direction with first intermediate tissue threads 16.
Each first fiber layer 14 includes a plurality of first reinforcing fiber yarns 11 as reinforcing fiber yarns, a plurality of first auxiliary yarns 12 as auxiliary yarns, the first reinforcing fiber yarns 11 and the first auxiliary yarns. And a plurality of first in-layer tissue threads 15 that join 12 in the arrangement direction. In each first fiber layer 14, the first reinforcing fiber yarns 11 and the first auxiliary yarns 12 are alternately arranged, and the first reinforcing fiber yarns 11, the first auxiliary yarns 12, and the first reinforcing fiber yarns 11 are arranged. And the first auxiliary yarns 12 are arranged in parallel to each other.

  In the first fiber layer 14, each first in-layer tissue yarn 15 engages with the lower surface or upper surface of the first auxiliary yarn 12 while engaging with the upper surface or lower surface of the first reinforcing fiber yarn 11, and in the arrangement direction. The first reinforcing fiber yarns 11 and the first auxiliary yarns 12 are alternately folded back along. The “reinforcing fiber” of the first reinforcing fiber yarn 11 is a fiber bundle that plays a role of reinforcing the matrix of the fiber reinforced composite material when the fiber structure 10 is used as the reinforcing base material of the fiber reinforced composite material. means. In the present embodiment, the first reinforcing fiber yarns 11 have the same thickness. The first auxiliary yarn 12 is made of a fiber bundle that is thinner than the first reinforcing fiber yarn 11.

  As shown in FIG. 1 or FIG. 4, the first laminated body 13 has two first fiber layers 14 laminated, and the two first fiber layers 14 are formed by a plurality of first intermediate tissue threads 16. Coupled in the stacking direction.

  As shown in FIG. 2 or FIG. 3, each first intermediate texture yarn 16 is disposed between the first in-layer texture yarns 15 adjacent to each other in the yarn main axis direction of the first reinforcing fiber yarn 11, and a plurality of first intermediate yarns 16 are arranged. The one intermediate tissue yarn 16 is arranged in parallel to each other. As shown in FIG. 4, each first intermediate tissue yarn 16 is folded back by engaging with the upper surface of the first auxiliary yarn 12 of the upper first fiber layer 14 located at one end in the stacking direction. After extending in the laminating direction of the fiber layer 14, the lower first fiber layer 14 located at the other end in the laminating direction is engaged with the first auxiliary yarn 12 on the lower surface and folded back. Each first intermediate tissue yarn 16 repeats engagement with the first auxiliary yarn 12 along the arrangement direction, and couples the two first fiber layers 14 in the stacking direction.

  In the 1st laminated body 13 of the said structure, 1st reinforcement fiber yarns 11 have overlapped in a part of width direction in planar view. In the first laminated body 13, the plurality of first reinforcing fiber threads 11 are arranged in a zigzag shape in the laminating direction of the first laminated body 13, and the first reinforcing fiber threads 11 are relatively displaced in the laminating direction. doing. In the first laminated body 13, the plurality of first auxiliary yarns 12 are relatively displaced in the laminating direction of the first laminated body 13 and are arranged in a zigzag shape.

As shown in FIG. 1 to FIG. 3, the second laminate 20 is a laminate of two second fiber layers 24, and the two second fiber layers 24 are laminated in the stacking direction with the second intermediate texture yarns 26. It is a combined structure.
Each second fiber layer 24 includes a plurality of second reinforcing fiber yarns 21 as reinforcing fiber yarns, a plurality of second auxiliary yarns 22 as auxiliary yarns, and the second reinforcing fiber yarns 21 and second auxiliary yarns. A plurality of second in-layer tissue threads 25 that join 22 in the arrangement direction. In each second fiber layer 24, the second reinforcing fiber yarns 21 and the second auxiliary yarns 22 are alternately arranged, and the second reinforcing fiber yarns 21, the second auxiliary yarns 22, and the second reinforcing fiber yarns 21. And the second auxiliary yarns 22 are arranged in parallel to each other.

  In the second fiber layer 24, each second-layer tissue yarn 25 engages with the lower surface or upper surface of the second auxiliary yarn 22 while engaging with the upper surface or lower surface of the second reinforcing fiber yarn 21, and in the arrangement direction. The second reinforcing fiber yarns 21 and the second auxiliary yarns 22 are alternately folded back along. The second reinforcing fiber yarn 21 is the same yarn as the first reinforcing fiber yarn 11, and the second auxiliary yarn 22 is the same yarn as the first auxiliary yarn 12.

  As shown in FIG. 3 or 4, in the second laminate 20, two second fiber layers 24 are laminated, and the two second fiber layers 24 are formed by a plurality of second intermediate tissue threads 26. Coupled in the stacking direction. Each second intermediate texture yarn 26 is disposed between the second layer texture yarns 25 adjacent to each other in the yarn main axis direction of the second reinforcing fiber yarn 21, and the plurality of second intermediate texture yarns 26 are parallel to each other. It is arranged. Each second intermediate tissue thread 26 is folded back by engaging with the upper surface of the first intermediate tissue thread 16 on the second auxiliary yarn 22 of the upper second fiber layer 24 located at one end in the stacking direction. After extending in the laminating direction of the two fiber layers 24, the lower auxiliary fiber 22 of the lower second fiber layer 24 located at the other end in the laminating direction is engaged with the lower surface 22 and folded back. Each second intermediate texture yarn 26 repeats engagement with the first intermediate texture yarn 16 and the second auxiliary yarn 22 along the arrangement direction, and couples the two second fiber layers 24 in the stacking direction. Yes.

  In the second laminated body 20 configured as described above, the second reinforcing fiber yarns 21 overlap with each other in a part in the width direction in a plan view. In the second laminated body 20, the plurality of second reinforcing fiber yarns 21 are arranged in a zigzag shape in the laminating direction, and the second reinforcing fiber yarns 21 are relatively displaced in the laminating direction. In the second laminate 20, the plurality of second auxiliary yarns 22 are relatively displaced in the stacking direction and are arranged in a zigzag shape.

  As shown in FIG. 1, in the fiber structure 10, the direction in which the yarn main axis of the first reinforcing fiber yarn 11 extends in the first laminated body 13 is defined as a first yarn main axis direction Y1. In the fiber structure 10, the orientation angle of the first reinforcing fiber yarn 11 is set to 0 degree. A direction in which the main axis of the second reinforcing fiber yarn 21 extends in the second laminate 20 is defined as a second yarn main axis direction Y2. In the fiber structure 10, the second yarn main axis direction Y2 in the second laminated body 20 intersects at 90 degrees and is orthogonal to the first yarn main axis direction Y1 in the first laminated body 13, and the fiber structure 10 is a biaxial orientation of 0 degrees and 90 degrees. And in the fiber structure 10, the 1st laminated body 13 from which the 1st thread | sled main shaft direction Y1 extends in one direction, and the 2nd laminated body 20 from which the 2nd thread | sled main shaft direction Y2 extends to another direction are couple | bonded in the lamination direction. Yes.

  In the fiber structure 10, the first stacked body 13 and the second stacked body 20 are coupled in the stacking direction. The first laminated body 13 and the second laminated body 20 are coupled in the laminating direction by the engagement of the first intermediate texture yarn 16 of the first laminated body 13 and the second intermediate texture yarn 26 of the second laminated body 20. ing.

  As shown in FIG. 3 or FIG. 4, the first intermediate textured yarn 16 of the first laminated body 13 is higher than the first reinforcing fiber thread 11 of the first fiber layer 14 on the lower side (close to the second laminated body 20). It extends to the position near the two laminated body 20 and is folded back. Further, the second intermediate texture yarn 26 of the second laminate 20 extends to a position closer to the first laminate 13 than the second reinforcing fiber yarn 21 of the second fiber layer 24 on the upper side (close to the first laminate 13). Is folded. And the 1st intermediate structure thread | yarn 16 of the 1st laminated body 13 and the 2nd intermediate structure thread | yarn 26 of the 2nd laminated body 20 are engaged between both the laminated bodies 13 and 20 in the state orthogonal to each other. .

  After the fiber structure 10 having the above configuration is shaped and formed into a preform, for example, a liquid thermosetting resin (matrix) before curing is impregnated and cured by an RTM method to form a fiber-reinforced composite material. The

Next, the operation of the fiber structure 10 will be described.
In the fiber structure 10, the first laminate 13 and the second laminate 20 include a first intermediate texture yarn 16 included in the first laminate 13 and a second intermediate texture yarn 26 included in the second laminate 20. Used in the stacking direction.

According to the above embodiment, the following effects can be obtained.
(1) In the fiber structure 10, when the first intermediate texture yarn 16 and the second intermediate texture yarn 26 are manufactured by the loom, the first intermediate texture yarn 16 and the second intermediate texture yarn 26 are controlled by controlling the feeding method of the first intermediate texture yarn 16 and the second intermediate texture yarn 26. By engaging, the first stacked body 13 and the second stacked body 20 can be coupled in the stacking direction. Therefore, the first yarn main axis direction Y1 of the first reinforcing fiber yarn 11 in the first laminated body 13 and the second yarn main axis direction Y2 of the second reinforcing fiber yarn 21 in the second laminated body 20 are biaxially oriented. Even the fiber structure 10 can be easily manufactured using a loom. Therefore, for example, after the first laminated body 13 and the second laminated body 20 are manufactured separately, compared to the case where the first laminated body 13 and the second laminated body 20 are combined in the stacking direction by different yarns in a separate process. The biaxially oriented fiber structure 10 can be easily manufactured.

  (2) In the fiber structure 10, the first reinforcing fiber yarn 11 and the second reinforcing fiber yarn 21 have straightness, and are not curved or bent. For this reason, in the fiber reinforced composite material using the fiber structure 10 as the reinforcing base material, the mechanical characteristics in the first yarn main axis direction Y1 and the second yarn main axis direction Y2 do not deteriorate.

  (3) The first intermediate structure yarn 16 of the first laminate 13 also has a function of bonding the first fiber layers 14 in the first laminate 13 in the lamination direction, and the second intermediate structure of the second laminate 20. The yarn 26 also has a function of bonding the second fiber layers 24 in the second laminate 20 in the stacking direction. For this reason, two types of coupling | bonding can be performed by each intermediate structure | tissue yarn 16 and 26, without increasing the thread | yarn used.

  (4) The fiber layers 14 and 24 in the laminated bodies 13 and 20 are joined in the lamination direction by the engagement between the auxiliary yarns 12 and 22 of the fiber layers 14 and 24 and the intermediate tissue yarns 16 and 26. be able to. In addition, the first laminated body 13 and the second laminated body 20 can be coupled in the stacking direction by engaging the first intermediate texture yarn 16 and the second intermediate texture yarn 26.

  Therefore, the fiber structure 10 can be coupled in the stacking direction by engaging yarns other than the first reinforcing fiber yarns 11 and the second reinforcing fiber yarns 21. Therefore, for example, the first reinforcing fiber yarn 11 and the second reinforcing fiber yarn 21 are not bent or bent due to the bonding in the stacking direction in the fiber structure 10, and the fiber structure 10 is used. In a fiber reinforced composite material, it is suppressed that the mechanical characteristic to each yarn principal-axis direction Y1, Y2 falls.

(Second Embodiment)
Next, 2nd Embodiment which actualized the fiber structure 10 is described according to FIGS. In the second embodiment, detailed description of the same parts as those in the first embodiment is omitted.

  As shown in FIG. 5, the fiber structure 10 of the second embodiment includes a first laminated body 13 and a second laminated body 20, a first in-layer tissue yarn 15 of the first laminated body 13, and a second The laminated body 20 is coupled in the laminating direction by engagement with the tissue yarn 25 in the second layer.

  As shown in FIG. 6 or FIG. 7, among the first fiber layers 14 of the first laminate 13, the first in-layer tissue yarn 15 of the first fiber layer 14 near the second laminate 20 is used as the first engagement layer. The internal tissue yarn 15a is used. In addition, among the second fiber layers 24 of the second laminate 20, the second in-layer tissue yarn 25 of the second fiber layer 24 near the first laminate 13 is set as a second engaging in-layer tissue yarn 25 a.

  In the vicinity of the boundary between the first laminated body 13 and the second laminated body 20, the second in-layer tissue yarn 25 a for engagement is overlapped with the second reinforcing fiber yarn 21 of the second fiber layer 24. 15a is engaged from the upper side, and is further engaged from the lower side to the second auxiliary yarns 22 adjacent in the arrangement direction. Therefore, the second in-layer tissue yarn 25a, together with the first in-layer tissue yarn 15a, binds the second fiber layer 24 in the arrangement direction.

  Then, as shown in FIG. 8, in the first laminated body 13, the two first fiber layers 14 are bonded in the lamination direction by the first intermediate tissue yarn 16, and in the second laminated body 20, The fiber layer 24 is bonded in the stacking direction by the second intermediate texture yarn 26. Therefore, the first laminated body 13 and the second laminated body 20 are coupled in the laminating direction by the engagement between the first engaging tissue yarn 15a and the second engaging tissue yarn 25a.

Therefore, according to the second embodiment, in addition to the effects (1) and (2) described in the first embodiment, the following effects can be obtained.
(5) In 2nd Embodiment, in the 1st laminated body 13 and the 2nd laminated body 20, with the 1st fiber layer 14 and the 2nd fiber layer 24 which are adjacent to the lamination direction, it is mutually in-layer structure yarn for engagement. 15a and 25a. Therefore, the 1st laminated body 13 and the 2nd laminated body 20 can be couple | bonded in the position close | similar to a lamination direction, and the coupling | bonding of laminated bodies can be strengthened.

(Third embodiment)
Next, 3rd Embodiment which actualized the fiber structure 10 is described according to FIGS. 9-12. In the third embodiment, detailed description of the same parts as those of the first embodiment is omitted.

  As shown in FIG. 9 or FIG. 12, in the fiber structure 10 of the third embodiment, the first laminated body 13 and the second laminated body 20 are composed of a first layer tissue yarn 15 and a second layer tissue yarn. 25, and the first intermediate tissue yarn 16 and the second intermediate tissue yarn 26 are engaged with each other in the stacking direction.

  As shown in FIG. 10 or FIG. 11, among the first fiber layers 14 of the first laminate 13, the first in-layer tissue yarn 15 of the first fiber layer 14 near the second laminate 20 is used as the first engagement layer. The internal tissue yarn 15a is used. In addition, among the second fiber layers 24 of the second laminate 20, the second in-layer tissue yarn 25 of the second fiber layer 24 near the first laminate 13 is set as a second engaging in-layer tissue yarn 25 a.

  As shown in FIG. 9 or FIG. 12, in the vicinity of the boundary between the first laminate 13 and the second laminate 20, the second in-layer tissue yarn 25 a for engagement engages with the second reinforcing fiber yarn 21 of the second fiber layer 24. The overlapping first in-layer tissue threads 15a are engaged from the upper side, and are engaged with the second auxiliary yarns 22 adjacent in the arrangement direction from the lower side. Therefore, the second in-layer tissue yarn 25a, together with the first in-layer tissue yarn 15a, binds the second fiber layer 24 in the arrangement direction.

  Further, the first intermediate texture yarn 16 of the first laminate 13 is closer to the second laminate 20 than the first reinforcing fiber yarn 11 of the first fiber layer 14 on the lower side (close to the second laminate 20). It extends and is folded. Further, the second intermediate texture yarn 26 of the second laminate 20 extends to a position closer to the first laminate 13 than the second reinforcing fiber yarn 21 of the second fiber layer 24 on the upper side (close to the first laminate 13). Is folded. And the 1st intermediate structure thread | yarn 16 of the 1st laminated body 13 and the 2nd intermediate structure thread | yarn 26 of the 2nd laminated body 20 are engaged between both the laminated bodies 13 and 20 in the state orthogonal to each other. .

Therefore, according to the third embodiment, in addition to the effects (1) and (2) described in the first embodiment, the following effects can be obtained.
(6) In the third embodiment, the first laminated body 13 and the second laminated body 20 are arranged in the laminating direction by the engagement between the in-layer tissue yarns 15a and 25a and the engagement between the intermediate tissue yarns 16 and 26. Are combined. Therefore, the coupling | bonding to the lamination direction of the 1st laminated body 13 and the 2nd laminated body 20 can be strengthened more.

In addition, you may change the said embodiment as follows.
○ In the first embodiment, the second laminated yarn 20 is engaged on the upper surface of the second auxiliary yarn 22 so that the direction of engagement of the tissue yarns 25 in the second layer 20 is opposite to that of the first embodiment. However, the second reinforcing fiber yarn 21 is engaged with the lower surface of the second reinforcing fiber yarn 21 so that the second in-layer tissue yarn 25 does not face the first in-layer tissue yarn 15 in the stacking direction. In addition, out of the second fiber layer 24 of the second laminate 20, the second in-layer tissue yarn 25 of the second fiber layer 24 near the first laminate 13 is defined as a second engaging in-layer tissue yarn 25 a.

  Then, the first intermediate structure yarn 16 of the first laminated body 13 and the second in-layer tissue thread 25a for engagement of the second laminated body 20 are engaged, and the first laminated body 13 and the second laminated body 20 are laminated. You may combine in a direction. Note that the first inter-layer tissue yarn 15a for engagement of the first laminate 13 and the second intermediate tissue yarn 26 of the second laminate 20 are engaged, and the first laminate 13 and the second laminate 20 are laminated. You may combine in a direction.

  The first laminated body 13 and the second laminated body 20 are the relationship between the first in-layer tissue thread 15a for engagement of the first laminated body 13 and the second in-layer tissue thread 25a for engagement of the second laminated body 20. And the first inter-layer tissue yarn 15a for engagement of the first laminated body 13 and the second intermediate tissue yarn 26 of the second laminated body 20 may be coupled to each other.

  Further, the first laminated body 13 and the second laminated body 20 are engaged with the first intermediate texture yarn 16 of the first laminated body 13 and the second intermediate texture yarn 26 of the second laminated body 20, and the first The first intermediate tissue yarn 16 of the laminate 13 and the second inter-layer tissue yarn 25a for engagement of the second laminate 20 may be coupled to each other.

  Furthermore, the first laminated body 13 and the second laminated body 20 are engaged with the first intermediate texture yarn 16 of the first laminated body 13 and the second intermediate texture yarn 26 of the second laminated body 20, and the first It may be coupled by engagement between the first engaging tissue yarns 15 a for the laminated body 13 and the second intermediate tissue yarns 26 for the second laminated body 20.

  In addition, the first laminate 13 and the second laminate 20 are engaged with the first intermediate tissue yarn 16 of the first laminate 13 and the second inter-layer tissue yarn 25a for engagement of the second laminate 20. , And the first in-layer tissue yarn 15a for engagement of the first laminate 13 and the second in-layer tissue yarn 25a for engagement of the second laminate 20 may be coupled to each other.

  In each embodiment, the fiber layer constituting the first laminate 13 is the first fiber layer 14 and the fiber layer constituting the second laminate 20 is the second fiber layer 24, Not limited to this. Three or more fiber layers may be included in the laminate.

  In each embodiment, the fiber structure 10 has a structure in which two sheets of the first laminate 13 and the second laminate 20 are stacked, but the present invention is not limited thereto, and the fiber structure 10 includes a laminate. A structure in which three or more sheets are stacked may be used.

In the embodiment, the first reinforcing fiber yarn 11 and the second reinforcing fiber yarn 21 have the same cross-sectional shape and the same thickness, but the cross-sectional shape and thickness may be changed as appropriate.
○ When the fiber structure 10 is used as a reinforcing base material for a fiber-reinforced composite material, there are no particular restrictions on the type of matrix resin and the method for manufacturing the fiber-reinforced composite material.

  ○ The fiber bundles constituting the first reinforcing fiber yarn 11 and the second reinforcing fiber yarn 21 are aramid fiber, poly-p-phenylenebenzobisoxazole fiber, ultrahigh High-strength organic fibers such as molecular weight polyethylene fibers and inorganic fibers such as glass fibers and ceramic fibers may be used.

Next, the technical idea that can be grasped from the above embodiment and other examples will be described below.
(A) The intermediate structure yarn is a fiber structure disposed between the in-layer structure yarns adjacent to each other in the yarn main axis direction of the reinforcing fiber yarn and the auxiliary yarn.

  (B) A fiber reinforced composite material in which a fiber resin is impregnated with a matrix resin, wherein the fiber structure is formed by alternately arranging reinforcing fiber yarns and auxiliary yarns, and the reinforcing fiber yarns and auxiliary yarns are layers. It has a plurality of laminates in which a plurality of fiber layers bonded in the arrangement direction by internal tissue yarns are laminated, and each laminate has the same fiber principal axis direction of the reinforcing fiber yarns and the auxiliary yarns of the plurality of fiber layers. And in the lamination direction of the fiber layers, the reinforcing fiber yarns are relatively displaced in a state of overlapping each other, the auxiliary yarns are relatively displaced, and the fiber layers are laminated. Are joined by intermediate texture yarns engaged with the auxiliary yarns located at both ends in the direction, and the plurality of laminated bodies are arranged in a state where the reinforcing fiber yarns and the yarn main axis directions of the auxiliary yarns are orthogonal to each other And one At least one of the in-layer texture yarn and the intermediate texture yarn of the laminate that extends in the direction of the yarn principal axis, and the in-layer texture yarn and the intermediate texture yarn of the laminate that extends in the direction of the yarn principal axis in the other direction. A fiber-reinforced composite material in which the laminates are bonded in the lamination direction by engagement with at least one of the above.

  Y1 ... first yarn main axis direction, Y2 ... second yarn main axis direction, 10 ... fiber structure, 11 ... first reinforcing fiber yarn, 12 ... first auxiliary yarn, 13 ... first laminate, 14 ... first fiber layer 15 ... first layer texture yarn, 16 ... first intermediate texture yarn, 20 ... second laminate, 21 ... second reinforcing fiber yarn, 22 ... second auxiliary yarn, 24 ... second fiber layer, 25 ... first 2-layer texture yarn, 26 ... second intermediate texture yarn.

Claims (4)

Reinforcing fiber yarns and auxiliary yarns are alternately arranged, and have a plurality of laminates in which a plurality of fiber layers in which the reinforcing fiber yarns and auxiliary yarns are bonded in the arrangement direction by the in-layer tissue yarns are laminated,
In each laminate, the reinforcing fiber yarns of the plurality of fiber layers and the auxiliary yarns have the same main axis direction of the auxiliary yarns, and the reinforcing fiber yarns are relatively overlapped with each other in the stacking direction of the fiber layers. Are displaced, the auxiliary yarns are relatively displaced from each other, and the fiber layers are joined by an intermediate tissue yarn engaged with the auxiliary yarns located at both ends in the stacking direction,
The plurality of laminated bodies are arranged in a state in which the yarn principal axis directions of the reinforcing fiber yarns and the auxiliary yarns are orthogonal to each other,
At least one of the in-layer texture yarn and the intermediate texture yarn of the laminate that extends in one direction in the yarn main axis direction, and the in-layer texture yarn and the intermediate texture in the laminate that extends in the yarn main axis direction in the other direction. A fiber structure, wherein the laminates are coupled in the lamination direction by engagement with at least one of yarns.   The laminates are coupled to each other by the engagement of the intermediate texture yarn of the laminate that extends in one direction with the yarn main axis direction and the intermediate texture yarn of the laminate that extends in the other direction with the yarn main axis direction. The fiber structure according to claim 1.   The laminates are coupled to each other by engagement of the in-layer texture yarn of the laminate extending in one direction with the yarn main axis direction and the in-layer texture yarn of the laminate extending in the other direction with the yarn principal axis direction. The fiber structure according to claim 1.   Engagement of the intermediate structure yarn of the laminate extending in one direction with the yarn main axis direction and the intermediate structure yarn of the laminate extending in the other direction with the yarn main axis direction, and the yarn main axis direction in one direction 2. The laminates are coupled to each other by engagement of the in-layer tissue yarns of the laminate that extend and the intra-layer tissue yarns of the laminate that extend in the main axis direction in the other direction. Fiber structure.

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