WO2012169308A1 - Fiber bundle sheet configured of reinforced fiber - Google Patents

Fiber bundle sheet configured of reinforced fiber Download PDF

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Publication number
WO2012169308A1
WO2012169308A1 PCT/JP2012/061895 JP2012061895W WO2012169308A1 WO 2012169308 A1 WO2012169308 A1 WO 2012169308A1 JP 2012061895 W JP2012061895 W JP 2012061895W WO 2012169308 A1 WO2012169308 A1 WO 2012169308A1
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WO
WIPO (PCT)
Prior art keywords
fiber bundle
fiber
sheet
support frame
main sewing
Prior art date
Application number
PCT/JP2012/061895
Other languages
French (fr)
Japanese (ja)
Inventor
真梨 河原
堀　藤夫
Original Assignee
株式会社 豊田自動織機
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社 豊田自動織機 filed Critical 株式会社 豊田自動織機
Publication of WO2012169308A1 publication Critical patent/WO2012169308A1/en

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    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D25/00—Woven fabrics not otherwise provided for
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
    • D03D15/50—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the properties of the yarns or threads
    • D03D15/587—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the properties of the yarns or threads adhesive; fusible
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
    • D03D15/20—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads
    • D03D15/283—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads synthetic polymer-based, e.g. polyamide or polyester fibres
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
    • D03D15/40—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the structure of the yarns or threads
    • D03D15/44—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the structure of the yarns or threads with specific cross-section or surface shape
    • D03D15/46—Flat yarns, e.g. tapes or films
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2505/00—Industrial
    • D10B2505/02—Reinforcing materials; Prepregs

Definitions

  • the present invention relates to a fiber bundle sheet made of reinforcing fibers.
  • a resin transfer molding method (RTM method) is known as a method for producing a fiber-reinforced composite material.
  • the liquid thermosetting resin is injected into the reinforcing fiber base disposed in the mold, and the thermosetting resin is heated and cured.
  • a fiber reinforced composite material is manufactured by the RTM method, first, a plurality of fiber bundle layers made of fibers arranged in one direction are laminated. Next, the laminated fiber bundle layer is used as a reinforcing fiber base, and the reinforcing fiber base is shaped into a target shape. In that state, a liquid thermosetting resin is injected into the reinforcing fiber base.
  • unidirectional woven fabric As a fiber bundle layer composed of fibers arranged in one direction, there is a woven fabric called a unidirectional woven fabric (unidirectional woven fabric). Unidirectional woven fabrics are woven in the same manner as plain woven fabrics, using fiber bundles that function as reinforcing fibers for warp yarns and yarns that are so thin that they do not function as reinforcing fibers for weft yarns.
  • the weft functions as an auxiliary thread, and allows the warp to be combined and handled as a woven fabric. If the weft is made thin and the warp undulation is made as small as possible, the binding force of the woven fabric is lost and the woven fabric cannot be established.
  • Patent Document 1 in order to give the fabric a binding force, a fusion yarn is used for the weft, the weft of the unidirectional fabric is heated, and the weft is crossed between the weft and the warp. Some are fused to the warp.
  • the unidirectional woven fabric disclosed in Patent Document 1 is inferior in formability because the intersection of the warp and the weft is joined at the fusion part of the weft. Further, the fused yarn is expensive and the manufacturing cost is increased.
  • An object of the present invention is to provide a fiber bundle sheet that is excellent in formability as compared with a unidirectional fabric using a fusion yarn and does not require the use of an expensive fusion yarn.
  • the fiber bundle sheet is composed of at least one fiber bundle layer configured by arranging fiber bundles that are a plurality of reinforcing fibers in one direction. It is configured.
  • the fiber bundle layer is formed in a sheet shape by binding the fiber bundles to each other by lock stitching with the first thread and the second thread. The main sewing of the fiber bundle layer is performed along a direction intersecting with the arrangement direction of the fiber bundles.
  • the fiber bundle in the portion surrounded by the first yarn and the second yarn is easier to move than a unidirectional woven fabric joined by fusion of the fusion yarn. Therefore, the shaping property of the fiber bundle sheet can be enhanced. Further, it is easy to perform the main sewing with the desired interval between the adjacent main sewing rows. For this reason, the fiber bundle sheet
  • the reinforcing fiber is an inorganic fiber such as carbon fiber, glass fiber or ceramic fiber, or a high-strength organic fiber such as aramid fiber, poly-p-phenylenebenzobisoxazole fiber or ultrahigh molecular weight polyethylene fiber.
  • one direction is a direction in which a plurality of fiber bundles are arranged substantially in parallel. In this case, there is no distinction between the case where the fiber bundle is oriented from right to left and the case where it is oriented from left to right. In this case, for example, the case where the fiber bundle is folded and arranged is included.
  • the main sewing means a sewing method in which two threads of the first thread and the second thread are used and the second thread intersects the loop of the first thread.
  • the seams are the same on the front and back sides, and the seams are independent for each stitch, like the seams of a household sewing machine.
  • the main sewing of the present invention includes a sewing method in which the first thread is folded back while forming a loop and the second thread extends linearly.
  • the second yarn extends linearly.
  • the fiber bundles are joined by the main stitch that intersects while the second thread is bent in the same manner as the first thread.
  • the fiber bundles are joined by lock stitches in which the second thread extends linearly.
  • seat can be improved.
  • the basis weight of the fiber bundle layer is preferably 0.1 kg / m 2 to 2 kg / m 2 .
  • the basis weight of the fiber bundle layer reflects the thickness of the fiber bundle. That is, if the fiber bundle is too thin, a fiber bundle sheet suitable for the reinforcing fiber substrate of the fiber-reinforced composite material cannot be obtained. On the other hand, even if the fiber bundle is too thick, a fiber bundle sheet suitable for the reinforcing fiber substrate of the fiber-reinforced composite material cannot be obtained. Therefore, an appropriate fiber bundle sheet can be obtained by setting the basis weight of the fiber bundle layer within the range of 0.1 kg / m 2 to 2 kg / m 2 .
  • the pitch of the main sewing is constant.
  • the pitch of the main sewing means an interval between the folded portions (bending portions) of the upper thread constituting the main sewing.
  • a row of lock stitches having a constant pitch from one end to the other end in the width direction of the fiber bundle layer, a range of small pitches from the one end to the other end in the width direction of the fiber bundle layer, and a large pitch It is preferable that the row of the main stitches in which the range is repeated are formed at predetermined intervals along the direction perpendicular to the fiber bundle layer.
  • the fiber bundle sheet when used as the reinforcing fiber base, it can be easily shaped according to the shape of the fiber reinforced composite material.
  • the pitch of the main sewing is preferably 1.5 mm to 6 mm.
  • the fiber bundle sheet is preferably formed into a sheet shape by binding a plurality of fiber bundle layers having different fiber bundle arrangement directions to each other by lock stitching.
  • a plurality of fiber bundle layers in which fibers are arranged in one direction are used as a reinforcing fiber base material, and a plurality of fiber bundle layers are laminated so that the arrangement direction of fiber bundles is different.
  • a pseudo-isotropic laminated fiber bundle layer is formed.
  • the several fiber bundle layer from which the arrangement direction of a fiber bundle differs is mutually joined by the main sewing, and is formed in the sheet form. For this reason, a man-hour can be reduced compared with the case where a fiber bundle sheet is manufactured from one fiber bundle layer and a plurality of fiber bundle sheets are laminated.
  • FIG. 1 is a perspective view of the fiber bundle sheet
  • (b) is sectional drawing along the 1b-1b line
  • the top view which shows positional relationships, such as a support frame, a fiber bundle layer, a pressing member, and a needle
  • the perspective view which shows the positional relationship of the structure and needle
  • FIG. 8A is a perspective view of a fiber bundle sheet according to another embodiment
  • FIG. 7B is a cross-sectional view taken along line 7b-7b in FIG. 7A
  • FIG. 9A is a perspective view of a fiber bundle sheet according to another embodiment
  • FIG. 9B is a cross-sectional view taken along line 8b-8b in FIG. Sectional drawing of the fiber bundle sheet which concerns on another embodiment.
  • the fiber bundle sheet 11 is composed of at least one fiber bundle layer 13.
  • the fiber bundle layer 13 is configured by arranging fiber bundles 12 that are a plurality of reinforcing fibers in one direction.
  • the fiber bundle layer 13 is formed in a sheet shape by binding the fiber bundle 12 to each other by the main stitching with the upper thread 14 and the lower thread 15.
  • the upper thread 14 is the first thread
  • the lower thread 15 is the second thread.
  • the main stitching is performed so that the lower thread 15 extends linearly. This state is formed by making the tension of the lower thread 15 greater than the tension of the upper thread 14.
  • the lower thread 15 may extend while curving somewhat.
  • the pitch P of the main sewing is constant and is set to be approximately the same as the width of the fiber bundle 12.
  • the upper thread 14 is folded at a pitch P interval at substantially both ends in the width direction of the fiber bundle 12.
  • the adjacent fiber bundles 12 are shown apart from each other in order to facilitate understanding of the positional relationship between the fiber bundle 12 and the upper thread 14.
  • adjacent fiber bundles 12 are arranged with their end portions in the width direction overlapped.
  • the fiber bundle 12 a fiber that is lightweight, has high breaking strength, and has a large elastic modulus is used.
  • a carbon fiber non-twisted fiber bundle (tow) is used as the fiber bundle 12.
  • One carbon fiber bundle is formed by bundling hundreds to tens of thousands of fine fibers. The number of fibers constituting the fiber bundle is selected according to the required performance.
  • the fiber bundles 12 are arranged in one direction in a state where the fiber intervals are widened and the fiber bundles 12 are flattened.
  • reinforcing fibers constituting the fiber bundle 12 in addition to carbon fibers, inorganic fibers such as glass fibers and ceramic fibers, or high-strength organic materials such as aramid fibers, poly-p-phenylenebenzobisoxazole fibers, and ultrahigh molecular weight polyethylene fibers.
  • a fiber etc. are suitably selected according to required performance. For example, when the required performance of rigidity and strength for the fiber reinforced composite material is high, it is preferable to use carbon fibers for the fiber bundle 12. By using an inexpensive glass fiber for the fiber bundle 12, the cost is reduced.
  • Basis weight of the fiber bundle layer 13 is set according to the required performance within the 0.1kg / m 2 ⁇ 2kg / m 2.
  • the thickness of the fiber bundle 12 is set according to the basis weight of the fiber bundle layer 13.
  • the pitch of the main stitch is 1.5 mm to 6 mm.
  • the upper thread 14 and the lower thread organic fiber threads such as nylon and polyester are used.
  • the fiber bundle sheet 11 is used as the reinforcing fiber base material of the fiber reinforced composite material, it is not necessary to cause the upper thread 14 and the lower thread 15 to function as the reinforcing fiber base material. For this reason, it is preferable to use the thin upper thread 14 and the lower thread 15.
  • the fiber bundle layer 13 is formed by bonding a plurality of fiber bundles 12 to each other by main sewing with an upper thread 14 and a lower thread 15. For this reason, the fiber bundle 12 in the portion surrounded by the upper yarn 14 and the lower yarn 15 is easier to move than a unidirectional fabric bonded by fusing of the fusing yarn. For this reason, the fiber bundle sheet 11 is excellent in formability. Further, the interval between the adjacent main sewing rows can be easily changed to a desired interval. By doing in this way, it becomes easy to give the fiber bundle sheet
  • the manufacturing device performs the main sewing in the same manner as a general main sewing machine.
  • the manufacturing apparatus includes a support frame 21 that supports the entire fiber bundle layer 13, a support frame drive mechanism (not shown), and a pair of fiber bundle pressing portions 22 and 23. It has.
  • the support frame drive mechanism moves the support frame 21 in the axial direction and the width direction of the fiber bundle 12 together with the fiber bundle layer 13 supported by the support frame 21.
  • Each fiber bundle pressing part 22, 23 holds the fiber bundle layer 13 supported by the support frame 21 at a predetermined position.
  • a plurality of pins 24 are provided at both ends in the longitudinal direction of the support frame 21. The pins 24 are fixed at regular intervals and detachably from the support frame 21.
  • the support frame 21 is configured to be removable from the support frame drive mechanism. The operation of supporting the fiber bundle layer 13 with respect to the support frame 21 is performed with the support frame 21 removed from the support frame drive mechanism.
  • the fiber bundle pressing portions 22 and 23 are disposed on both sides of the main sewing needle 25 and the pressing member 26, respectively.
  • the pressing member 26 corresponds to a cloth presser for a lockstitch sewing machine.
  • the fiber bundle pressing part 22 includes an upper pressing part 22a and a lower pressing part 22b that simultaneously hold the fiber bundle 12 in the vertical direction.
  • the fiber bundle pressing portion 23 also includes an upper pressing portion 23a and a lower pressing portion 23b that hold the fiber bundle 12 in the vertical direction at the same time.
  • the upper pressing portions 22a and 23a press the upper surface of the fiber bundle 12, respectively, and the lower pressing portions 22b and 23b press the lower surface of the fiber bundle 12 and the fiber bundle 12 is held.
  • a hook 27 is provided below the main sewing needle 25.
  • the shapes of the upper pressing portions 22a and 23a shown in FIG. 2 do not match those shown in FIG.
  • the lower surfaces of the upper pressing portions 22a and 23a are weakly in contact with all the fiber bundles 12 supported by the support frame 21 at the same time.
  • the upper pressing portions 22 a and 23 a are fixed to predetermined positions of the support frame 21 by bolts 28.
  • the upper pressing portion 22a disposed on the left side of FIG. 2 is formed with a notch portion 22c with the upper side notched.
  • the notch portion 22c is provided at a position corresponding to the main sewing needle 25 and the pressing member 26 when one row of main sewing is completed.
  • the notch portion 22c prevents the main sewing needle 25 and the pressing member 26 from interfering with the upper pressing portion 22a when the upper pressing portions 22a and 23a move together with the support frame 21 to the right side in FIG.
  • the upper pressing portion 23a disposed on the right side of FIG. 2 is also formed with a notch portion 23c with the upper side notched.
  • the notch portions 23c are also provided at positions corresponding to the main sewing needle 25 and the pressing member 26 when a row of main sewing is completed.
  • the notch portion 23c prevents the main sewing needle 25 and the pressing member 26 from interfering with the upper pressing portion 23a when the upper pressing portions 22a and 23a move together with the support frame 21 to the left side in FIG.
  • the lower pressing portion 22b is moved between a holding position where the fiber bundle 12 is held between the upper surface of the lower pressing portion 22b and the lower surface of the upper pressing portion 22a and a standby position below the holding position by a driving mechanism (not shown). It is configured to be movable.
  • the lower pressing portion 23b is also driven between a holding position where the fiber bundle 12 is held by the upper surface of the lower pressing portion 23b and the lower surface of the upper pressing portion 23a and a standby position below the holding position by a driving mechanism (not shown). It is configured to be movable. Further, the lower pressing portions 22b and 23b and the drive mechanism are configured to be movable together with the support frame 21 by the support frame drive mechanism.
  • the lower pressing portions 22b and 23b are formed shorter than the upper pressing portions 22a and 23a so as not to interfere with the shuttle 27 when moving in the longitudinal direction of the support frame 21 together with the support frame 21.
  • the drive mechanism of the lower pressing portions 22b and 23b places the lower pressing portions 22b and 23b in the standby position. Further, at the time of main sewing, the driving mechanism of the lower pressing portions 22b and 23b arranges the lower pressing portions 22b and 23b in the clamping position.
  • the support frame driving mechanism intermittently moves the support frame 21 and the fiber bundle pressing portions 22 and 23 at the pitch P in the width direction of the support frame 21 in synchronization with the vertical movement of the main sewing needle 25. .
  • the support frame driving mechanism moves the support frame 21 and the fiber bundle pressing portions 22 and 23 in the longitudinal direction of the support frame 21 by the interval of the main sewing row. Thereafter, the support frame 21 and the fiber bundle pressing portions 22 and 23 are moved in the width direction of the support frame 21 until the start position of the main stitch row becomes a position facing the main sewing needle 25.
  • the support frame 21 is removed from the support frame drive mechanism. Further, the upper pressing portions 22 a and 23 a are removed from the support frame 21.
  • a plurality of fiber bundles 12 are arranged in one direction with respect to the support frame 21 and fixed so as to constitute one fiber bundle layer 13.
  • the starting end of the fiber bundle 12 is fixed with an adhesive near the fixing position of the pin 24 on the support frame 21.
  • the fiber bundle 12 is moved to the right along the longitudinal direction of the support frame 21 and wound around the pin 24.
  • the fiber bundle 12 is folded back by the pin 24, it is moved to the left along the longitudinal direction of the support frame 21 and wound around another pin 24.
  • the fiber bundle layer 13 having a predetermined width is configured.
  • the upper pressing portions 22a and 23a are attached to the support frame 21, respectively.
  • the support frame 21 is attached to the support frame drive mechanism. Subsequently, as shown by the solid line in FIG. 2, the support frame 21 is disposed so that the fiber bundle pressing portions 22, 23, the main sewing needle 25, and the pressing member 26 coincide with the main sewing start position of the fiber bundle layer 13, Start lockstitching.
  • the main stitch is wound around the bobbin 29 in the hook 27 while moving the main sewing needle 25 up and down while the upper thread 14 is inserted into the needle hole in the same manner as a general sewing machine. It is formed by passing the lower thread 15 through the loop of the upper thread 14.
  • the shuttle 27 is omitted.
  • the lock stitch 15 is formed in a state where the lower thread 15 is extended straight. That is, the tensions of the upper thread 14 and the lower thread 15 are adjusted so that the tension of the lower thread 15 is greater than the tension of the upper thread 14.
  • the tension adjustment of the upper thread 14 and the lower thread 15 is performed by a known configuration.
  • the support frame 21 moves intermittently by one pitch in the width direction of the support frame 21 in synchronization with the vertical movement of the main sewing needle 25 until the main sewing is completed for one row.
  • the upper pressing portions 22a and 23a and the lower pressing portions 22b and 23b move together with the support frame 21 while being held at the holding positions.
  • the fiber bundle layer 13 moves relative to the pressing member 26 while contacting the pressing member 26.
  • the fiber bundle 12 cannot be loosened. Therefore, the main sewing is performed continuously and smoothly.
  • the support frame 21 moves in the longitudinal direction of the support frame 21 by the interval between the main sewing rows. At this time, as shown by a chain line in FIG. 2, the support frame 21 is arranged so that the upper presser portions 22 a and 23 a do not interfere with the main sewing needle 25 and the presser member 26 in the width direction of the support frame 21.
  • the notches 22c and 23c of the upper pressing portions 22a and 23a are disposed in the vicinity of the main sewing needle 25 and the pressing member 26.
  • the lower pressing portions 22b and 23b are arranged so as not to interfere with the shuttle 27.
  • the support frame 21 can also move without interfering with the shuttle 27.
  • the support frame 21 moves in the width direction of the support frame 21 together with the fiber bundle pressing portions 22 and 23 until the main sewing needle 25 is made coincident with the main sewing start position of the row to be newly sewn.
  • the lower pressing portions 22b and 23b are moved to the holding positions, respectively.
  • the pressing member 26 is disposed at a position for pressing the fiber bundle layer 13.
  • the main sewing is started. Thereafter, the same procedure is repeated to form a main stitch on the entire fiber bundle layer 13.
  • the fiber bundle layer 13 is removed from the support frame 21. Then, unnecessary portions are removed from the fiber bundle layer 13 to complete the fiber bundle sheet 11.
  • the fiber bundle sheets 11 are laminated in a number corresponding to the thickness of the fiber reinforced composite material. Then, in the state where the fiber bundle layer 13 is laminated, the resin is impregnated and cured by, for example, the RTM method. In this way, a fiber reinforced composite material is manufactured.
  • the RTM method a liquid thermosetting resin is injected into a mold in a state where a laminated fiber bundle layer is disposed in a resin-impregnated mold. And the thermosetting resin in a type
  • the fiber bundle sheets 11 are laminated with different arrangement directions of the plurality of fiber bundle sheets 11.
  • the fiber bundle sheet 11 is composed of at least one fiber bundle layer 13 configured by arranging fiber bundles 12 as a plurality of reinforcing fibers in one direction.
  • the fiber bundle layer 13 is formed in a sheet shape by binding the fiber bundle 12 to each other by the main stitching with the upper thread 14 and the lower thread 15.
  • the main sewing of the fiber bundle layer 13 is performed along a direction intersecting with the arrangement direction of the fiber bundles 12. According to this structure, it is excellent in formability compared with the unidirectional fabric using a fused yarn, and it is not necessary to use an expensive fused yarn. Therefore, the manufacturing cost of the fiber bundle sheet 11 can be suppressed.
  • the fiber reinforced composite material includes a laminated fiber bundle layer in which the fiber bundle sheets 11 are laminated as a reinforcing fiber base material.
  • the main sewing is performed so that the thread 15 extends linearly. According to this configuration, the physical properties of the fiber-reinforced composite material can be improved as compared with the case where the fiber bundle 12 is joined by the main stitch that bends and intersects with the lower thread 15 in the same manner as the upper thread 14.
  • the basis weight of the fiber bundle layer 13 is 0.1 kg / m 2 to 2 kg / m 2 .
  • the basis weight reflects the thickness of the fiber bundle 12. That is, if the fiber bundle 12 is too thin, the fiber bundle sheet 11 suitable for the reinforcing fiber substrate of the fiber-reinforced composite material cannot be obtained. On the other hand, even if the fiber bundle 12 is too thick, the fiber bundle sheet 11 suitable for the reinforcing fiber base material of the fiber-reinforced composite material cannot be obtained. Therefore, an appropriate fiber bundle sheet 11 can be obtained by setting the basis weight of the fiber bundle layer within the range of 0.1 kg / m 2 to 2 kg / m 2 .
  • the main sewing is performed so that the pitch is 1.5 mm to 6 mm. If the pitch of the main stitch is too small, the fiber bundle sheet 11 suitable for the reinforcing fiber base material of the fiber reinforced composite material cannot be obtained. Moreover, even if the pitch is too large, the fiber bundle sheet 11 suitable for the reinforcing fiber base material of the fiber-reinforced composite material cannot be obtained. Therefore, an appropriate fiber bundle sheet 11 can be obtained by setting the pitch of the main stitching within the range of 1.5 mm to 6 mm.
  • 2nd Embodiment differs from 1st Embodiment about the structure of the manufacturing apparatus of a fiber bundle sheet
  • the support frame 21 can be moved only in the longitudinal direction of the support frame 21 by a support frame driving mechanism.
  • the main sewing needle 25, the pressing member 26, and the shuttle 27 are arranged in a state where the main sewing needle 25 and the fiber bundle layer 13 are not engaged, that is, in the raised position.
  • the main sewing needle 25, the pressing member 26, and the shuttle 27 are moved intermittently at the pitch P of the main sewing along the width direction of the support frame 21 by a moving device (not shown).
  • a moving device not shown.
  • the main sewing needle 25, the pressing member 26, and the shuttle 27 are simultaneously moved to the next sewing start position of the next row by the moving device without being engaged with the fiber bundle layer 13. To do.
  • the upper pressing portions 22a and 23a have the same length as the lower pressing portions 22b and 23b.
  • the upper pressing portions 22 a and 23 a are formed to be able to engage with the fiber bundle layer 13 in the frame of the support frame 21.
  • the upper pressing portions 22a and 23a are driven by a driving mechanism (not shown) to hold the fiber bundle 12 with the upper surface of the lower pressing portions 22b and 23b and the lower surface of the upper pressing portions 22a and 23a, and to stand by above the holding position. It is configured to be movable between positions. Unlike the first embodiment, the upper pressing portions 22 a and 23 a and the lower pressing portions 22 b and 23 b do not move together with the support frame 21.
  • the upper pressing portions 22a and 23a and the lower pressing portions 22b and 23b are arranged so as to be movable between a holding position and a standby position at a predetermined position in the longitudinal direction of the support frame 21.
  • the upper pressing portions 22a and 23a and the lower pressing portions 22b and 23b are arranged at the standby position.
  • the main sewing is started from the state indicated by the solid line in FIG.
  • the main sewing needle 25 and the pressing member 26 are respectively arranged at one end in the width direction of the fiber bundle layer 13. Further, the upper pressing portions 22a and 23a and the lower pressing portions 22b and 23b are arranged at the clamping positions, respectively.
  • the main sewing needle 25, the pressing member 26, and the shuttle 27 are moved intermittently at the pitch P of the main sewing toward the other end in the width direction of the fiber bundle layer 13.
  • the main sewing needle 25 and the pressing member 26 are moved to the position indicated by the two-dot chain line in FIG. 5A, the main sewing for one row is completed.
  • the support frame 21 moves along the longitudinal direction to the left in FIG. 5A by the interval of the main sewing row.
  • the main sewing needle 25 and the pressing member 26 are respectively disposed at the raised positions where they are not engaged with the fiber bundle 12.
  • the upper pressing portions 22a and 23a and the lower pressing portions 22b and 23b are respectively arranged at the standby positions.
  • the main sewing needle 25, the presser member 26, and the shuttle 27 are moved to the main sewing start position of the next row. Then, the main sewing is started in a state where the pressing member 26 is engaged with the fiber bundle layer 13 at the main sewing start position of the next row.
  • the main stitching is started from one end in the longitudinal direction of the fiber bundle layer 13 (left end shown in FIG. 5B) and one end in the width direction of the fiber bundle layer 13 (upper end shown in FIG. 5B). The And as shown by the arrow in FIG.5 (b), this stitch is formed in order one row in the fiber bundle layer 13 whole.
  • the upper pressing portions 22a and 23a and the lower pressing portions 22b and 23b are arranged so as to be movable between the holding position and the standby position at predetermined positions in the longitudinal direction of the support frame 21. For this reason, the structure for moving the upper pressing parts 22a and 23a and the lower pressing parts 22b and 23b together with the support frame 21 becomes unnecessary. Therefore, the upper pressing portions 22a and 23a are not fixed to the support frame 21 and the bolts 28 for the fixing are not required. Moreover, it is not necessary to form the notches 22c and 23c in the upper pressing portions 22a and 23a.
  • the main sewing needle 25, the pressing member 26, and the shuttle 27 are moved from one end to the other end in the width direction of the support frame 21 to complete one row of main sewing, and then the main sewing is performed.
  • the needle 25, the pressing member 26, and the shuttle 27 may be moved from the other end in the width direction of the support frame 21 to one end to perform the next row of main sewing.
  • the pressing member 26 is formed in a shape that can move in both directions along the width direction of the support frame 21 while being engaged with the fiber bundle layer 13.
  • the pressing member 26 may be formed in a cylindrical shape, and the main sewing needle 25 may move in the cylindrical pressing member 26.
  • the lower end of the pressing member 26 is chamfered to reduce the frictional resistance with the fiber bundle layer 13.
  • This configuration is also applicable to the first embodiment in which the support frame 21 moves in the width direction of its own confidence, and also in the second embodiment in which the main sewing needle 25, the pressing member 26 and the shuttle 27 move in the width direction of the support frame 21. Can be applied.
  • the return position of the upper thread 14 may be shifted by a half pitch between adjacent main sewing lines while the pitch P of the main sewing is constant. Good.
  • a row of main stitches in which a small pitch range and a large pitch range are repeated from one end to the other end in the direction may be formed at predetermined intervals in the longitudinal direction of the fiber bundle layer 13. That is, the stitches (stitched portions) may be partially omitted so as to facilitate shaping. In this case, the formability of the fiber bundle sheet 11 is higher in the large pitch range than in the small pitch range.
  • the fiber bundle sheet 11 can be provided with an appropriate shapeability.
  • the fiber bundle sheet 11 In the unidirectional woven fabric using the fusion yarn of the prior art, it is not possible to partially eliminate the fiber bundle 12 as described above.
  • the configuration of the lower thread 15 may be changed to perform the main sewing. That is, the upper thread 14 and the lower thread 15 may be folded back at substantially the center in the thickness direction of the fiber bundle 12 as in a general sewing. That is, the stitches may be the same on the front and back sides, and the stitches may be independent for each stitch.
  • the configuration is not limited to the configuration in which the fiber bundle layer 13 is supported in a state in which the fiber bundle 12 is folded back with the pins 24 fixed to the support frame 21.
  • the ends of the opened fiber bundle 12 may be bonded to both sides of the support frame 21 in the longitudinal direction.
  • the support frame 21 is also increased according to the length of the fiber bundle layer 13 to be joined by the main sewing, and the entire apparatus may be increased in size.
  • the opened fiber bundle 12 may be supported between a pair of rolls that can be rotationally driven.
  • the position to perform the next main stitch of the fiber bundle layer 13 is rotated to correspond to the main sewing needle 25 and the like. Can be made. Therefore, the structure which moves the support frame 21 to a longitudinal direction becomes unnecessary. Therefore, even if the fiber bundle layer 13 is long, the enlargement of the entire apparatus is suppressed, and the installation space of the apparatus is also reduced.
  • the fiber bundle layer 13 is not limited to one layer.
  • a plurality of fiber bundle layers 13 may be laminated so that the arrangement directions of the fiber bundles 12 are different, and the laminated fiber bundle layers 13 may be joined by main stitching with the upper thread 14 and the lower thread 15.
  • a plurality of fiber bundle layers 13 may be laminated so that the arrangement directions of the fiber bundles 12 are the same.
  • the upper yarn 14 and the lower yarn 15 are not limited to organic fiber yarns, and inorganic fibers such as glass fibers, carbon fibers, or ceramic fibers may be used. However, since inorganic fibers are weaker to bending with a large curvature than organic fibers, organic fibers are preferred.
  • the main sewing start position may be changed from the left end in the longitudinal direction of the fiber bundle layer 13 to the right end.

Abstract

A fiber bundle sheet (11) which is configured of at least one fiber bundle layer (13), said fiber bundle layer (13) being formed by aligning fiber bundles (12), each consisting of multiple reinforced fiber strands, in one direction. The fiber bundle layer (13) is shaped into a sheet form by joining together the fiber bundles (12) via final stitching with a needle thread (14) and a bobbin thread (15). The fiber bundle layer (13) is finally stitched along the direction intersecting with the alignment direction of the fiber bundles (12). The final stitching is conducted so as to allow the bobbin thread (15) to linearly extend. The weight per area of the fiber bundle layer (13) is 0.1-2 kg/m2. During the final stitching, the pitch (P) is maintained at a constant level.

Description

強化繊維からなる繊維束シートFiber bundle sheet made of reinforcing fibers
　本発明は、強化繊維からなる繊維束シートに関する。 The present invention relates to a fiber bundle sheet made of reinforcing fibers.
　繊維強化複合材料の製造方法として、レジン・トランスファー・モールディング法（ＲＴＭ法）が知られている。この方法によれば、型内に配置した強化繊維基材に液状の熱硬化性樹脂を注入し、熱硬化性樹脂を加熱して硬化させる。ＲＴＭ法で繊維強化複合材料を製造する場合、まず、一方向に配列された繊維からなる複数の繊維束層を積層する。次に、積層された繊維束層を強化繊維基材とし、強化繊維基材を目的とする形状に賦形する。そして、その状態で、強化繊維基材に、液状の熱硬化性樹脂を注入する。 A resin transfer molding method (RTM method) is known as a method for producing a fiber-reinforced composite material. According to this method, the liquid thermosetting resin is injected into the reinforcing fiber base disposed in the mold, and the thermosetting resin is heated and cured. When a fiber reinforced composite material is manufactured by the RTM method, first, a plurality of fiber bundle layers made of fibers arranged in one direction are laminated. Next, the laminated fiber bundle layer is used as a reinforcing fiber base, and the reinforcing fiber base is shaped into a target shape. In that state, a liquid thermosetting resin is injected into the reinforcing fiber base.
　一方向に配列された繊維からなる繊維束層として、一方向織物（一方向性織物）と呼ばれる織物がある。一方向織物は、経糸に強化繊維として機能する繊維束を使用し、緯糸に強化繊維として機能しないほど細い糸を使用して、平織物と同様の方法により織製される。緯糸は、補助糸として機能し、経糸を結合して織物として取り扱えるようにする。緯糸を細くして経糸のうねりをできるだけ小さくすると、織物の拘束力がなくなり、織物として成立しなくなる。そこで、特許文献１に開示されるように、織物に拘束力を持たせるため、緯糸に融着糸を使用し、一方向織物の緯糸を加熱して、緯糸と経糸との交差部で緯糸を経糸に融着したものがある。 As a fiber bundle layer composed of fibers arranged in one direction, there is a woven fabric called a unidirectional woven fabric (unidirectional woven fabric). Unidirectional woven fabrics are woven in the same manner as plain woven fabrics, using fiber bundles that function as reinforcing fibers for warp yarns and yarns that are so thin that they do not function as reinforcing fibers for weft yarns. The weft functions as an auxiliary thread, and allows the warp to be combined and handled as a woven fabric. If the weft is made thin and the warp undulation is made as small as possible, the binding force of the woven fabric is lost and the woven fabric cannot be established. Therefore, as disclosed in Patent Document 1, in order to give the fabric a binding force, a fusion yarn is used for the weft, the weft of the unidirectional fabric is heated, and the weft is crossed between the weft and the warp. Some are fused to the warp.
　ところが、特許文献１に開示の一方向織物は、経糸と緯糸の交差部が緯糸の融着部で結合されるため、賦形性に劣る。また、融着糸が高価であり、製造コストが高くなる。 However, the unidirectional woven fabric disclosed in Patent Document 1 is inferior in formability because the intersection of the warp and the weft is joined at the fusion part of the weft. Further, the fused yarn is expensive and the manufacturing cost is increased.
実開平３－１８１８９号公報Japanese Utility Model Publication No. 3-18189
　本発明の目的は、融着糸を使用した一方向織物に比べて賦形性に優れ、高価な融着糸を使用する必要がない繊維束シートを提供することにある。 An object of the present invention is to provide a fiber bundle sheet that is excellent in formability as compared with a unidirectional fabric using a fusion yarn and does not require the use of an expensive fusion yarn.
　上記課題を解決するため、本発明の第一の態様によれば、繊維束シートは、複数本の強化繊維である繊維束を一方向に配列して構成された少なくとも１層の繊維束層から構成されている。繊維束層は、繊維束を第１糸及び第２糸による本縫いにより互いに結合してシート状に形成されている。繊維束層の本縫いは、繊維束の配列方向と交差する方向に沿って行われる。 In order to solve the above problems, according to the first aspect of the present invention, the fiber bundle sheet is composed of at least one fiber bundle layer configured by arranging fiber bundles that are a plurality of reinforcing fibers in one direction. It is configured. The fiber bundle layer is formed in a sheet shape by binding the fiber bundles to each other by lock stitching with the first thread and the second thread. The main sewing of the fiber bundle layer is performed along a direction intersecting with the arrangement direction of the fiber bundles.
　この構成によれば、第１糸及び第２糸で囲まれた部分の繊維束は、融着糸の融着により結合された一方向織物に比べて動き易くなっている。よって、繊維束シートの賦形性を高めることができる。また、隣り合う本縫いの列の間隔を所望の間隔にして本縫いすることが容易である。このため、隣り合う本縫いの列の間隔を変更することにより、繊維束層の厚さに応じて適切な賦形性を有する繊維束シートを容易に製造することができる。また、高価な融着糸が不要となる。 According to this configuration, the fiber bundle in the portion surrounded by the first yarn and the second yarn is easier to move than a unidirectional woven fabric joined by fusion of the fusion yarn. Therefore, the shaping property of the fiber bundle sheet can be enhanced. Further, it is easy to perform the main sewing with the desired interval between the adjacent main sewing rows. For this reason, the fiber bundle sheet | seat which has suitable shaping property according to the thickness of a fiber bundle layer can be easily manufactured by changing the space | interval of the row | line | column of the adjacent main stitch. Further, an expensive fused yarn is not necessary.
　ここで、強化繊維は、炭素繊維、ガラス繊維、セラミック繊維等の無機繊維またはアラミド繊維、ポリ－ｐ－フェニレンベンゾビスオキサゾール繊維、超高分子量ポリエチレン繊維等の高強度の有機繊維である。また、一方向は、複数の繊維束が略並行に揃えられて配列している方向である。この場合、繊維束が右から左に配向される場合と、左から右に配向されている場合とを区別しない。この場合、例えば、繊維束が折り返されて配列されている場合を含む。また、本縫いは、第１糸及び第２糸の２本の糸を用い、第１糸のループに第２糸を交差させる縫い方を意味する。一般の本縫いでは、家庭用ミシンの縫い目のように、縫い目が表裏で同じであると共に縫い目が１縫い目ごとに独立している。本発明の本縫いには、第１糸がループを形成しながら折り返されると共に第２糸が直線状に延びている縫い方も含まれている。 Here, the reinforcing fiber is an inorganic fiber such as carbon fiber, glass fiber or ceramic fiber, or a high-strength organic fiber such as aramid fiber, poly-p-phenylenebenzobisoxazole fiber or ultrahigh molecular weight polyethylene fiber. In addition, one direction is a direction in which a plurality of fiber bundles are arranged substantially in parallel. In this case, there is no distinction between the case where the fiber bundle is oriented from right to left and the case where it is oriented from left to right. In this case, for example, the case where the fiber bundle is folded and arranged is included. Further, the main sewing means a sewing method in which two threads of the first thread and the second thread are used and the second thread intersects the loop of the first thread. In general main stitches, the seams are the same on the front and back sides, and the seams are independent for each stitch, like the seams of a household sewing machine. The main sewing of the present invention includes a sewing method in which the first thread is folded back while forming a loop and the second thread extends linearly.
　上記の繊維束シートにおいて、第２糸は、直線状に延びていることが好ましい。 In the above fiber bundle sheet, it is preferable that the second yarn extends linearly.
　従来は、第２糸が第１糸と同様に屈曲しながら交差する本縫いにより繊維束を結合していた。その点、本発明によれば、一般の本縫いと異なり、第２糸が直線状に延びる本縫いにより繊維束を結合している。この場合、従来の方法に比べて、繊維束シートを積層した強化繊維基材の物性を良くすることができる。 Conventionally, the fiber bundles are joined by the main stitch that intersects while the second thread is bent in the same manner as the first thread. In that respect, according to the present invention, unlike a general lock stitch, the fiber bundles are joined by lock stitches in which the second thread extends linearly. In this case, compared with the conventional method, the physical property of the reinforced fiber base material which laminated | stacked the fiber bundle sheet | seat can be improved.
　上記の繊維束シートにおいて、繊維束層の目付けは、０．１ｋｇ／ｍ２～２ｋｇ／ｍ２であることが好ましい。 In the fiber bundle sheet, the basis weight of the fiber bundle layer is preferably 0.1 kg / m 2 to 2 kg / m 2 .
　繊維束層の目付けには、繊維束の太さが反映される。即ち、繊維束が細すぎると、繊維強化複合材料の強化繊維基材に適した繊維束シートを得ることができない。一方、繊維束が太すぎても、繊維強化複合材料の強化繊維基材に適した繊維束シートを得ることができない。そのため、繊維束層の目付けを０．１ｋｇ／ｍ２～２ｋｇ／ｍ２の範囲内に設定することにより、適切な繊維束シートを得ることができる。 The basis weight of the fiber bundle layer reflects the thickness of the fiber bundle. That is, if the fiber bundle is too thin, a fiber bundle sheet suitable for the reinforcing fiber substrate of the fiber-reinforced composite material cannot be obtained. On the other hand, even if the fiber bundle is too thick, a fiber bundle sheet suitable for the reinforcing fiber substrate of the fiber-reinforced composite material cannot be obtained. Therefore, an appropriate fiber bundle sheet can be obtained by setting the basis weight of the fiber bundle layer within the range of 0.1 kg / m 2 to 2 kg / m 2 .
　上記の繊維束シートにおいて、本縫いのピッチは一定であることが好ましい。 In the above fiber bundle sheet, it is preferable that the pitch of the main sewing is constant.
　この構成によれば、繊維束シートを製造する際に、本縫いの条件を同じにすることができる。つまり、本縫いのピッチを変更する場合に比べて、繊維束シートの製造が容易になる。ここで、「本縫いのピッチ」は、本縫いを構成する上糸の折り返し部（屈曲部）間の間隔を意味する。 This configuration makes it possible to make the conditions for the main stitching the same when manufacturing the fiber bundle sheet. That is, the fiber bundle sheet can be easily manufactured as compared with the case where the pitch of the main sewing is changed. Here, “the pitch of the main sewing” means an interval between the folded portions (bending portions) of the upper thread constituting the main sewing.
　上記の繊維束シートにおいて、繊維束層の幅方向の一端から他端までピッチが一定である本縫いの列と、繊維束層の幅方向の一端から他端まで小さなピッチの範囲及び大きなピッチの範囲が繰り返される本縫いの列とが、繊維束層の直交する方向に沿って所定間隔で形成されていることが好ましい。 In the above-described fiber bundle sheet, a row of lock stitches having a constant pitch from one end to the other end in the width direction of the fiber bundle layer, a range of small pitches from the one end to the other end in the width direction of the fiber bundle layer, and a large pitch It is preferable that the row of the main stitches in which the range is repeated are formed at predetermined intervals along the direction perpendicular to the fiber bundle layer.
　この構成によれば、繊維束シートを強化繊維基材として使用する場合、繊維強化複合材料の形状にあわせて容易に賦形することができる。 According to this configuration, when the fiber bundle sheet is used as the reinforcing fiber base, it can be easily shaped according to the shape of the fiber reinforced composite material.
　上記の繊維束シートにおいて、本縫いのピッチは、１．５ｍｍ～６ｍｍであることが好ましい。 In the above-mentioned fiber bundle sheet, the pitch of the main sewing is preferably 1.5 mm to 6 mm.
　本縫いのピッチが小さすぎると、繊維強化複合材料の強化繊維基材に適した繊維束シートを得ることができない。また、本縫いのピッチが大きすぎても、繊維強化複合材料の強化繊維基材に適した繊維束シートを得ることができない。そのため、本縫いのピッチを１．５ｍｍ～６ｍｍの範囲内に設定することにより、適切な繊維束シートを得ることができる。 If the pitch of the main stitch is too small, a fiber bundle sheet suitable for the reinforced fiber base material of the fiber reinforced composite material cannot be obtained. Moreover, even if the pitch of the main stitch is too large, a fiber bundle sheet suitable for the reinforcing fiber base material of the fiber reinforced composite material cannot be obtained. Therefore, an appropriate fiber bundle sheet can be obtained by setting the pitch of the main stitching within the range of 1.5 mm to 6 mm.
　上記の繊維束シートにおいて、繊維束シートは、繊維束の配列方向が異なる複数の繊維束層を本縫いにより互いに結合してシート状に形成されていることが好ましい。 In the above-described fiber bundle sheet, the fiber bundle sheet is preferably formed into a sheet shape by binding a plurality of fiber bundle layers having different fiber bundle arrangement directions to each other by lock stitching.
　繊維強化複合材料として高い性能が要求される場合、繊維が一方向に配列されている複数の繊維束層を強化繊維基材とし、繊維束の配列方向が異なるように複数の繊維束層を積層して、擬似等方性の積層繊維束層を形成する。この構成によれば、繊維束の配列方向が異なる複数の繊維束層が、本縫いにより互いに結合されて、シート状に形成されている。このため、１層の繊維束層から繊維束シートを製造して複数の繊維束シートを積層する場合に比べて、工数を低減することができる。 When high performance is required as a fiber reinforced composite material, a plurality of fiber bundle layers in which fibers are arranged in one direction are used as a reinforcing fiber base material, and a plurality of fiber bundle layers are laminated so that the arrangement direction of fiber bundles is different. Thus, a pseudo-isotropic laminated fiber bundle layer is formed. According to this structure, the several fiber bundle layer from which the arrangement direction of a fiber bundle differs is mutually joined by the main sewing, and is formed in the sheet form. For this reason, a man-hour can be reduced compared with the case where a fiber bundle sheet is manufactured from one fiber bundle layer and a plurality of fiber bundle sheets are laminated.
（ａ）は本発明の第１実施形態に係る繊維束シートの斜視図、（ｂ）は図１（ａ）の１ｂ－１ｂ線に沿った断面図。(A) is a perspective view of the fiber bundle sheet | seat which concerns on 1st Embodiment of this invention, (b) is sectional drawing along the 1b-1b line | wire of Fig.1 (a). 支持枠、繊維束層、押さえ部材、針等の位置関係を示す平面図。The top view which shows positional relationships, such as a support frame, a fiber bundle layer, a pressing member, and a needle | hook. 繊維束層を支持する構成と針との位置関係を示す斜視図。The perspective view which shows the positional relationship of the structure and needle | hook which support a fiber bundle layer. 本縫い中の状態を示す斜視図。The perspective view which shows the state during the main sewing. （ａ）は本発明の第２実施形態に係る支持枠、繊維束層、押さえ部材、針等の位置関係を示す平面図、（ｂ）は本縫い時の針の移動を示す図。(A) is a top view which shows the positional relationship of the support frame which concerns on 2nd Embodiment of this invention, a fiber bundle layer, a pressing member, a needle | hook, etc., (b) is a figure which shows the movement of the needle | hook at the time of main sewing. （ａ）は別の実施形態に係る本縫い時の針の移動を示す図、（ｂ）は押さえ部材及び針の関係を示す斜視図。(A) is a figure which shows the movement of the needle | hook at the time of the main sewing which concerns on another embodiment, (b) is a perspective view which shows the relationship between a pressing member and a needle | hook. （ａ）は別の実施形態に係る繊維束シートの斜視図、（ｂ）は図７（ａ）の７ｂ－７ｂ線に沿った断面図。FIG. 8A is a perspective view of a fiber bundle sheet according to another embodiment, and FIG. 7B is a cross-sectional view taken along line 7b-7b in FIG. 7A. （ａ）は別の実施形態に係る繊維束シートの斜視図、（ｂ）は図８（ａ）の８ｂ－８ｂ線に沿った断面図。FIG. 9A is a perspective view of a fiber bundle sheet according to another embodiment, and FIG. 9B is a cross-sectional view taken along line 8b-8b in FIG. 別の実施形態に係る繊維束シートの断面図。Sectional drawing of the fiber bundle sheet which concerns on another embodiment.
　（第１実施形態）
　以下、本発明を具体化した第１実施形態を図１（ａ）～図４にしたがって説明する。 (First embodiment)
A first embodiment embodying the present invention will be described below with reference to FIGS.
　図１（ａ），（ｂ）に示すように、繊維束シート１１は、少なくとも１層の繊維束層１３から構成されている。繊維束層１３は、複数本の強化繊維である繊維束１２を一方向に配列して構成されている。繊維束層１３は、繊維束１２を上糸１４及び下糸１５による本縫いにより互いに結合してシート状に形成されている。ここでは、上糸１４が第１糸であり、下糸１５が第２糸である。図１（ｂ）に示すように、下糸１５が直線状に延びるように、本縫いが行われている。この状態は、下糸１５の張力を上糸１４の張力より大きくすることで形成されている。下糸１５は、多少湾曲しながら延びていてもよい。本縫いのピッチＰは一定であり、繊維束１２の幅と略同じに設定されている。このため、上糸１４は、繊維束１２の幅方向のほぼ両端部において、ピッチＰ間隔で折り返されている。図１（ａ），（ｂ）では、繊維束１２と上糸１４との位置関係を分かり易くするため、隣り合う繊維束１２同士が離れて示されている。しかし、実際は、隣り合う繊維束１２は、幅方向の端部同士を重ね合わせて配列されている。 1 (a) and 1 (b), the fiber bundle sheet 11 is composed of at least one fiber bundle layer 13. The fiber bundle layer 13 is configured by arranging fiber bundles 12 that are a plurality of reinforcing fibers in one direction. The fiber bundle layer 13 is formed in a sheet shape by binding the fiber bundle 12 to each other by the main stitching with the upper thread 14 and the lower thread 15. Here, the upper thread 14 is the first thread, and the lower thread 15 is the second thread. As shown in FIG. 1B, the main stitching is performed so that the lower thread 15 extends linearly. This state is formed by making the tension of the lower thread 15 greater than the tension of the upper thread 14. The lower thread 15 may extend while curving somewhat. The pitch P of the main sewing is constant and is set to be approximately the same as the width of the fiber bundle 12. For this reason, the upper thread 14 is folded at a pitch P interval at substantially both ends in the width direction of the fiber bundle 12. 1A and 1B, the adjacent fiber bundles 12 are shown apart from each other in order to facilitate understanding of the positional relationship between the fiber bundle 12 and the upper thread 14. However, in actuality, adjacent fiber bundles 12 are arranged with their end portions in the width direction overlapped.
　繊維束１２として、軽量で破断強度が高く、弾性率の大きい繊維が用いられる。繊維束１２として、例えば、炭素繊維の無撚りの繊維束（トウ）が使用される。１本の炭素繊維束は、細い繊維を数百～数万本束ねて構成されている。繊維束を構成する繊維の本数は、要求性能に応じて選択される。繊維束１２は、繊維間隔を拡げてかつ繊維束１２を扁平にした状態で一方向に配列されている。繊維束１２をなす強化繊維として、炭素繊維以外に、ガラス繊維やセラミック繊維等の無機繊維、あるいは、アラミド繊維、ポリ－ｐ－フェニレンベンゾビスオキサゾール繊維、超高分子量ポリエチレン繊維等の高強度の有機繊維等が、要求性能に応じて適宜選択される。例えば、繊維強化複合材料に対する剛性・強度の要求性能が高い場合、繊維束１２に炭素繊維を用いることが好ましい。繊維束１２に安価なガラス繊維を用いることで、低コストとなる。繊維束層１３の目付けは、０．１ｋｇ／ｍ２～２ｋｇ／ｍ２の範囲内で要求性能に応じて設定される。繊維束１２の太さは、繊維束層１３の目付に応じて設定される。本縫いのピッチは、１．５ｍｍ～６ｍｍである。 As the fiber bundle 12, a fiber that is lightweight, has high breaking strength, and has a large elastic modulus is used. For example, a carbon fiber non-twisted fiber bundle (tow) is used as the fiber bundle 12. One carbon fiber bundle is formed by bundling hundreds to tens of thousands of fine fibers. The number of fibers constituting the fiber bundle is selected according to the required performance. The fiber bundles 12 are arranged in one direction in a state where the fiber intervals are widened and the fiber bundles 12 are flattened. As reinforcing fibers constituting the fiber bundle 12, in addition to carbon fibers, inorganic fibers such as glass fibers and ceramic fibers, or high-strength organic materials such as aramid fibers, poly-p-phenylenebenzobisoxazole fibers, and ultrahigh molecular weight polyethylene fibers. A fiber etc. are suitably selected according to required performance. For example, when the required performance of rigidity and strength for the fiber reinforced composite material is high, it is preferable to use carbon fibers for the fiber bundle 12. By using an inexpensive glass fiber for the fiber bundle 12, the cost is reduced. Basis weight of the fiber bundle layer 13 is set according to the required performance within the 0.1kg / m 2 ~ 2kg / m 2. The thickness of the fiber bundle 12 is set according to the basis weight of the fiber bundle layer 13. The pitch of the main stitch is 1.5 mm to 6 mm.
　上糸１４及び下糸１５には、ナイロン、ポリエステル等の有機繊維製の糸が使用される。繊維束シート１１を繊維強化複合材料の強化繊維基材として使用する状態で、上糸１４及び下糸１５を強化繊維基材として機能させる必要はない。このため、細い上糸１４及び下糸１５方を使用することが好ましい。 For the upper thread 14 and the lower thread 15, organic fiber threads such as nylon and polyester are used. In a state where the fiber bundle sheet 11 is used as the reinforcing fiber base material of the fiber reinforced composite material, it is not necessary to cause the upper thread 14 and the lower thread 15 to function as the reinforcing fiber base material. For this reason, it is preferable to use the thin upper thread 14 and the lower thread 15.
　繊維束層１３は、複数の繊維束１２を上糸１４及び下糸１５による本縫いにより互いに結合して形成されている。このため、上糸１４及び下糸１５で囲まれた部分の繊維束１２は、融着糸の融着により結合された一方向織物に比べて動き易くなっている。このため、繊維束シート１１は賦形性に優れている。また、隣り合う本縫い列の間隔を所望の間隔に容易に変更することができる。このようにすることで、一方向織物に比べて、繊維束層１３の厚さに応じて繊維束シート１１に適切な賦形性をもたせることが容易となる。 The fiber bundle layer 13 is formed by bonding a plurality of fiber bundles 12 to each other by main sewing with an upper thread 14 and a lower thread 15. For this reason, the fiber bundle 12 in the portion surrounded by the upper yarn 14 and the lower yarn 15 is easier to move than a unidirectional fabric bonded by fusing of the fusing yarn. For this reason, the fiber bundle sheet 11 is excellent in formability. Further, the interval between the adjacent main sewing rows can be easily changed to a desired interval. By doing in this way, it becomes easy to give the fiber bundle sheet | seat 11 appropriate shaping property according to the thickness of the fiber bundle layer 13, compared with a unidirectional fabric.
　次に、上記の繊維束シート１１の製造方法について図２及び図３を参照して説明する。 Next, a method for manufacturing the fiber bundle sheet 11 will be described with reference to FIGS.
　製造装置は、一般的な本縫いミシンと同様な方式で本縫いを行う。しかし、本縫いミシンと異なり、図２に示すように、製造装置は、繊維束層１３全体を支持する支持枠２１と、図示しない支持枠駆動機構と、一対の繊維束押さえ部２２，２３とを備えている。支持枠駆動機構は、支持枠２１を、支持枠２１に支持された繊維束層１３と共に、繊維束１２の軸線方向及び幅方向へ移動させる。各繊維束押さえ部２２，２３は、支持枠２１に支持された繊維束層１３を所定の位置で保持する。支持枠２１の長手方向の両端には、複数のピン２４が設けられている。各ピン２４は、一定間隔で、かつ支持枠２１から取り外し可能にそれぞれ固定されている。また、支持枠２１は、支持枠駆動機構に対しても取り外し可能に構成されている。支持枠２１に対して繊維束層１３を支持する作業は、支持枠２１を支持枠駆動機構から取り外した状態で行われる。 The manufacturing device performs the main sewing in the same manner as a general main sewing machine. However, unlike the main sewing machine, as shown in FIG. 2, the manufacturing apparatus includes a support frame 21 that supports the entire fiber bundle layer 13, a support frame drive mechanism (not shown), and a pair of fiber bundle pressing portions 22 and 23. It has. The support frame drive mechanism moves the support frame 21 in the axial direction and the width direction of the fiber bundle 12 together with the fiber bundle layer 13 supported by the support frame 21. Each fiber bundle pressing part 22, 23 holds the fiber bundle layer 13 supported by the support frame 21 at a predetermined position. A plurality of pins 24 are provided at both ends in the longitudinal direction of the support frame 21. The pins 24 are fixed at regular intervals and detachably from the support frame 21. Further, the support frame 21 is configured to be removable from the support frame drive mechanism. The operation of supporting the fiber bundle layer 13 with respect to the support frame 21 is performed with the support frame 21 removed from the support frame drive mechanism.
　図２及び図３に示すように、繊維束押さえ部２２，２３は、本縫い針２５及び押さえ部材２６の両側にそれぞれ配置されている。押さえ部材２６は、本縫いミシンの布押さえに相当する。図３に示すように、繊維束押さえ部２２は、繊維束１２を上下方向から同時に挟持する上側押さえ部２２ａ及び下側押さえ部２２ｂを備えている。繊維束押さえ部２３も、繊維束１２を上下方向から同時に挟持する上側押さえ部２３ａ及び下側押さえ部２３ｂを備えている。上側押さえ部２２ａ，２３ａが繊維束１２の上面をそれぞれ押圧し、下側押さえ部２２ｂ，２３ｂが繊維束１２の下面をそれぞれ押圧して、繊維束１２が挟持される。本縫い針２５の下方には、釜２７が設けられている。図示の都合上、図２に示す上側押さえ部２２ａ，２３ａの形状は、図３に示すそれらと一致していない。 As shown in FIGS. 2 and 3, the fiber bundle pressing portions 22 and 23 are disposed on both sides of the main sewing needle 25 and the pressing member 26, respectively. The pressing member 26 corresponds to a cloth presser for a lockstitch sewing machine. As shown in FIG. 3, the fiber bundle pressing part 22 includes an upper pressing part 22a and a lower pressing part 22b that simultaneously hold the fiber bundle 12 in the vertical direction. The fiber bundle pressing portion 23 also includes an upper pressing portion 23a and a lower pressing portion 23b that hold the fiber bundle 12 in the vertical direction at the same time. The upper pressing portions 22a and 23a press the upper surface of the fiber bundle 12, respectively, and the lower pressing portions 22b and 23b press the lower surface of the fiber bundle 12 and the fiber bundle 12 is held. A hook 27 is provided below the main sewing needle 25. For convenience of illustration, the shapes of the upper pressing portions 22a and 23a shown in FIG. 2 do not match those shown in FIG.
　上側押さえ部２２ａ，２３ａの下面は、支持枠２１に支持された全ての繊維束１２に対し同時に弱く接している。この状態で、上側押さえ部２２ａ，２３ａは、支持枠２１の所定位置にボルト２８により固定される。図２の左側に配置される上側押さえ部２２ａには、上側が切り欠かれた切り欠き部２２ｃが形成されている。切り欠き部２２ｃは、一列の本縫いが完了したときの本縫い針２５及び押さえ部材２６と対応する位置に設けられている。切り欠き部２２ｃは、支持枠２１と共に上側押さえ部２２ａ，２３ａが図３の右側へ移動する際に本縫い針２５及び押さえ部材２６を上側押さえ部２２ａと干渉させないようにする。図２の右側に配置される上側押さえ部２３ａにも、上側が切り欠かれた切り欠き部２３ｃが形成されている。切り欠き部２３ｃも、一列の本縫いが完了したときの本縫い針２５及び押さえ部材２６と対応する位置に設けられている。切り欠き部２３ｃは、支持枠２１と共に上側押さえ部２２ａ，２３ａが図３の左側へ移動する際に本縫い針２５及び押さえ部材２６を上側押さえ部２３ａと干渉させないようにする。 The lower surfaces of the upper pressing portions 22a and 23a are weakly in contact with all the fiber bundles 12 supported by the support frame 21 at the same time. In this state, the upper pressing portions 22 a and 23 a are fixed to predetermined positions of the support frame 21 by bolts 28. The upper pressing portion 22a disposed on the left side of FIG. 2 is formed with a notch portion 22c with the upper side notched. The notch portion 22c is provided at a position corresponding to the main sewing needle 25 and the pressing member 26 when one row of main sewing is completed. The notch portion 22c prevents the main sewing needle 25 and the pressing member 26 from interfering with the upper pressing portion 22a when the upper pressing portions 22a and 23a move together with the support frame 21 to the right side in FIG. The upper pressing portion 23a disposed on the right side of FIG. 2 is also formed with a notch portion 23c with the upper side notched. The notch portions 23c are also provided at positions corresponding to the main sewing needle 25 and the pressing member 26 when a row of main sewing is completed. The notch portion 23c prevents the main sewing needle 25 and the pressing member 26 from interfering with the upper pressing portion 23a when the upper pressing portions 22a and 23a move together with the support frame 21 to the left side in FIG.
　下側押さえ部２２ｂは、図示しない駆動機構により、下側押さえ部２２ｂの上面と上側押さえ部２２ａの下面とにより繊維束１２を挟持する挟持位置と、挟持位置の下方の待機位置との間を移動可能に構成されている。下側押さえ部２３ｂも、図示しない駆動機構により、下側押さえ部２３ｂの上面と上側押さえ部２３ａの下面とにより繊維束１２を挟持する挟持位置と、挟持位置の下方の待機位置との間を移動可能に構成されている。また、下側押さえ部２２ｂ，２３ｂ及び駆動機構は、支持枠駆動機構により、支持枠２１と共に移動可能に構成されている。また、下側押さえ部２２ｂ，２３ｂは、支持枠２１と共に支持枠２１の長手方向に移動する際に釜２７と干渉しないようにするため、上側押さえ部２２ａ，２３ａよりも短く形成されている。支持枠２１が長手方向に移動するとき、下側押さえ部２２ｂ，２３ｂの駆動機構は、下側押さえ部２２ｂ，２３ｂを待機位置に配置する。また、本縫い時、下側押さえ部２２ｂ，２３ｂの駆動機構は、下側押さえ部２２ｂ，２３ｂを挟持位置に配置する。 The lower pressing portion 22b is moved between a holding position where the fiber bundle 12 is held between the upper surface of the lower pressing portion 22b and the lower surface of the upper pressing portion 22a and a standby position below the holding position by a driving mechanism (not shown). It is configured to be movable. The lower pressing portion 23b is also driven between a holding position where the fiber bundle 12 is held by the upper surface of the lower pressing portion 23b and the lower surface of the upper pressing portion 23a and a standby position below the holding position by a driving mechanism (not shown). It is configured to be movable. Further, the lower pressing portions 22b and 23b and the drive mechanism are configured to be movable together with the support frame 21 by the support frame drive mechanism. Further, the lower pressing portions 22b and 23b are formed shorter than the upper pressing portions 22a and 23a so as not to interfere with the shuttle 27 when moving in the longitudinal direction of the support frame 21 together with the support frame 21. When the support frame 21 moves in the longitudinal direction, the drive mechanism of the lower pressing portions 22b and 23b places the lower pressing portions 22b and 23b in the standby position. Further, at the time of main sewing, the driving mechanism of the lower pressing portions 22b and 23b arranges the lower pressing portions 22b and 23b in the clamping position.
　本縫い時、支持枠駆動機構は、本縫い針２５の上下動に同期して、支持枠２１及び繊維束押さえ部２２，２３を、支持枠２１の幅方向にピッチＰで間欠的に移動させる。１列の本縫いが完了すると、支持枠駆動機構は、支持枠２１及び繊維束押さえ部２２，２３を、支持枠２１の長手方向に本縫い列の間隔分だけ移動させる。その後、本縫い列の開始位置が本縫い針２５と対向する位置になるまで、支持枠２１及び繊維束押さえ部２２，２３を支持枠２１の幅方向に移動させる。 At the time of the main sewing, the support frame driving mechanism intermittently moves the support frame 21 and the fiber bundle pressing portions 22 and 23 at the pitch P in the width direction of the support frame 21 in synchronization with the vertical movement of the main sewing needle 25. . When one row of the main sewing is completed, the support frame driving mechanism moves the support frame 21 and the fiber bundle pressing portions 22 and 23 in the longitudinal direction of the support frame 21 by the interval of the main sewing row. Thereafter, the support frame 21 and the fiber bundle pressing portions 22 and 23 are moved in the width direction of the support frame 21 until the start position of the main stitch row becomes a position facing the main sewing needle 25.
　次、上記の製造装置による繊維束シート１１の製造手順について図２及び図４を参照して説明する。 Next, the manufacturing procedure of the fiber bundle sheet 11 by the above manufacturing apparatus will be described with reference to FIGS.
　先ず、支持枠２１を支持枠駆動機構から取り外す。また、支持枠２１から上側押さえ部２２ａ，２３ａを取り外す。この状態で、支持枠２１に対し複数本の繊維束１２を一方向に配列し、１層の繊維束層１３を構成するように固定する。具体的には、繊維束１２の始端を、支持枠２１上のピン２４の固定位置付近に接着剤で固着する。次に、繊維束１２を開繊しつつ、支持枠２１の長手方向に沿って右方へと移動させ、ピン２４に巻き付ける。そして、繊維束１２をピン２４で折り返してから、支持枠２１の長手方向に沿って左方へと移動させ、別のピン２４に巻き付ける。こうした操作を繰り返すことで、所定の幅を有する繊維束層１３が構成される。繊維束１２の終端を支持枠２１上に接着剤で固定した後、上側押さえ部２２ａ，２３ａを支持枠２１にそれぞれ取り付ける。 First, the support frame 21 is removed from the support frame drive mechanism. Further, the upper pressing portions 22 a and 23 a are removed from the support frame 21. In this state, a plurality of fiber bundles 12 are arranged in one direction with respect to the support frame 21 and fixed so as to constitute one fiber bundle layer 13. Specifically, the starting end of the fiber bundle 12 is fixed with an adhesive near the fixing position of the pin 24 on the support frame 21. Next, while opening the fiber bundle 12, the fiber bundle 12 is moved to the right along the longitudinal direction of the support frame 21 and wound around the pin 24. Then, after the fiber bundle 12 is folded back by the pin 24, it is moved to the left along the longitudinal direction of the support frame 21 and wound around another pin 24. By repeating these operations, the fiber bundle layer 13 having a predetermined width is configured. After the end of the fiber bundle 12 is fixed on the support frame 21 with an adhesive, the upper pressing portions 22a and 23a are attached to the support frame 21, respectively.
　次に、支持枠２１を支持枠駆動機構に取り付ける。続いて、図２の実線で示すように、繊維束押さえ部２２，２３、本縫い針２５及び押さえ部材２６を繊維束層１３の本縫い開始位置に一致させるように支持枠２１を配置し、本縫いを開始する。図４に示すように、本縫いは、一般の本縫いミシンと同様に、上糸１４を針孔に挿通した状態で本縫い針２５を上下動させると共に釜２７内のボビン２９に巻かれた下糸１５を上糸１４のループに通すことにより形成される。図４中、釜２７は省略されている。第１実施形態では、下糸１５を真っ直ぐに延ばした状態にして、本縫いが形成される。即ち、下糸１５の張力が上糸１４の張力より大きくなるように、上糸１４及び下糸１５の各張力がそれぞれ調整される。上糸１４及び下糸１５の張力調整は、公知の構成により行われる。 Next, the support frame 21 is attached to the support frame drive mechanism. Subsequently, as shown by the solid line in FIG. 2, the support frame 21 is disposed so that the fiber bundle pressing portions 22, 23, the main sewing needle 25, and the pressing member 26 coincide with the main sewing start position of the fiber bundle layer 13, Start lockstitching. As shown in FIG. 4, the main stitch is wound around the bobbin 29 in the hook 27 while moving the main sewing needle 25 up and down while the upper thread 14 is inserted into the needle hole in the same manner as a general sewing machine. It is formed by passing the lower thread 15 through the loop of the upper thread 14. In FIG. 4, the shuttle 27 is omitted. In the first embodiment, the lock stitch 15 is formed in a state where the lower thread 15 is extended straight. That is, the tensions of the upper thread 14 and the lower thread 15 are adjusted so that the tension of the lower thread 15 is greater than the tension of the upper thread 14. The tension adjustment of the upper thread 14 and the lower thread 15 is performed by a known configuration.
　本縫いが１列分完了するまで、支持枠２１は、本縫い針２５の上下動に同期して、支持枠２１の幅方向に１ピッチずつ間欠的に移動する。このとき、上側押さえ部２２ａ，２３ａ及び下側押さえ部２２ｂ，２３ｂは、挟持位置に保持された状態で支持枠２１と共に移動する。支持枠２１の移動に伴って、繊維束層１３は、押さえ部材２６に接触しながら押さえ部材２６に対して移動する。しかしながら、繊維束１２は、上側押さえ部２２ａ，２３ａ及び下側押さえ部２２ｂ，２３ｂにより挟持されているため弛められない。よって、本縫いが連続して円滑に行われる。 The support frame 21 moves intermittently by one pitch in the width direction of the support frame 21 in synchronization with the vertical movement of the main sewing needle 25 until the main sewing is completed for one row. At this time, the upper pressing portions 22a and 23a and the lower pressing portions 22b and 23b move together with the support frame 21 while being held at the holding positions. As the support frame 21 moves, the fiber bundle layer 13 moves relative to the pressing member 26 while contacting the pressing member 26. However, since the fiber bundle 12 is sandwiched between the upper pressing portions 22a and 23a and the lower pressing portions 22b and 23b, the fiber bundle 12 cannot be loosened. Therefore, the main sewing is performed continuously and smoothly.
　１列分の本縫いが完了すると、本縫い針２５及び押さえ部材２６が繊維束層１３と係合しない待機位置に配置され、かつ下側押さえ部２２ｂ，２３ｂが待機位置に配置されるため、繊維束層１３の挟持が解除される。その状態で、支持枠２１は、支持枠２１の長手方向に本縫い列の間隔分だけ移動する。その際、図２の鎖線で示すように、支持枠２１は、支持枠２１の幅方向において、上側押さえ部２２ａ，２３ａを本縫い針２５及び押さえ部材２６と干渉させないように配置されている。即ち、上側押さえ部２２ａ，２３ａの切り欠き部２２ｃ，２３ｃが、本縫い針２５及び押さえ部材２６付近に配置されている。また、このとき、下側押さえ部２２ｂ，２３ｂは、釜２７と干渉しないように配置されている。このため、支持枠２１は、釜２７と干渉することなく移動することもできる。 When the main sewing for one row is completed, the main sewing needle 25 and the pressing member 26 are disposed at the standby position where they are not engaged with the fiber bundle layer 13, and the lower pressing portions 22b and 23b are disposed at the standby position. The holding of the fiber bundle layer 13 is released. In this state, the support frame 21 moves in the longitudinal direction of the support frame 21 by the interval between the main sewing rows. At this time, as shown by a chain line in FIG. 2, the support frame 21 is arranged so that the upper presser portions 22 a and 23 a do not interfere with the main sewing needle 25 and the presser member 26 in the width direction of the support frame 21. That is, the notches 22c and 23c of the upper pressing portions 22a and 23a are disposed in the vicinity of the main sewing needle 25 and the pressing member 26. At this time, the lower pressing portions 22b and 23b are arranged so as not to interfere with the shuttle 27. For this reason, the support frame 21 can also move without interfering with the shuttle 27.
　次に、支持枠２１は、新たに本縫いされる列の本縫い開始位置を本縫い針２５を一致させるまで、繊維束押さえ部２２，２３と共に支持枠２１の幅方向に移動する。支持枠２１が移動した後、下側押さえ部２２ｂ，２３ｂを挟持位置にそれぞれ移動させる。また、押さえ部材２６が、繊維束層１３を押圧する位置に配置される。この状態で、本縫いが開始される。以下、同様の手順が繰り返されて、繊維束層１３全体に本縫いが形成される。本縫い終了後、繊維束層１３を支持枠２１から取り外す。そして、繊維束層１３から不要部分を除去して、繊維束シート１１を完成させる。 Next, the support frame 21 moves in the width direction of the support frame 21 together with the fiber bundle pressing portions 22 and 23 until the main sewing needle 25 is made coincident with the main sewing start position of the row to be newly sewn. After the support frame 21 moves, the lower pressing portions 22b and 23b are moved to the holding positions, respectively. Further, the pressing member 26 is disposed at a position for pressing the fiber bundle layer 13. In this state, the main sewing is started. Thereafter, the same procedure is repeated to form a main stitch on the entire fiber bundle layer 13. After the end of the main sewing, the fiber bundle layer 13 is removed from the support frame 21. Then, unnecessary portions are removed from the fiber bundle layer 13 to complete the fiber bundle sheet 11.
　繊維束シート１１は、繊維強化複合材料の厚さに対応する数だけ積層される。そして、繊維束層１３が積層された状態で、例えばＲＴＭ法により、樹脂の含浸及び硬化が行われる。こうして、繊維強化複合材料が製造される。ＲＴＭ法では、樹脂含浸用型内に積層繊維束層を配置した状態で、型内に液状の熱硬化性樹脂を注入する。そして、型内の熱硬化性樹脂を加熱硬化して、繊維強化複合材料を製造する。熱硬化性樹脂として、例えば、エポキシ樹脂が使用される。擬似等方性の積層繊維束層を構成する場合、複数の繊維束シート１１の配列方向を異ならせて、各繊維束シート１１を積層する。 The fiber bundle sheets 11 are laminated in a number corresponding to the thickness of the fiber reinforced composite material. Then, in the state where the fiber bundle layer 13 is laminated, the resin is impregnated and cured by, for example, the RTM method. In this way, a fiber reinforced composite material is manufactured. In the RTM method, a liquid thermosetting resin is injected into a mold in a state where a laminated fiber bundle layer is disposed in a resin-impregnated mold. And the thermosetting resin in a type | mold is heat-hardened and a fiber reinforced composite material is manufactured. For example, an epoxy resin is used as the thermosetting resin. When configuring a quasi-isotropic laminated fiber bundle layer, the fiber bundle sheets 11 are laminated with different arrangement directions of the plurality of fiber bundle sheets 11.
　以下、第１実施形態によれば、以下に示す効果を奏することができる。 Hereinafter, according to the first embodiment, the following effects can be obtained.
　（１）繊維束シート１１は、複数本の強化繊維である繊維束１２を一方向に配列して構成された少なくとも１層の繊維束層１３から構成されている。繊維束層１３は、繊維束１２を上糸１４及び下糸１５による本縫いにより互いに結合してシート状に形成されている。繊維束層１３の本縫いは、繊維束１２の配列方向と交差する方向に沿って行われる。この構成によれば、融着糸を使用した一方向織物に比べて賦形性に優れ、また、高価な融着糸を使用する必要もない。よって、繊維束シート１１の製造コストを抑えることができる。 (1) The fiber bundle sheet 11 is composed of at least one fiber bundle layer 13 configured by arranging fiber bundles 12 as a plurality of reinforcing fibers in one direction. The fiber bundle layer 13 is formed in a sheet shape by binding the fiber bundle 12 to each other by the main stitching with the upper thread 14 and the lower thread 15. The main sewing of the fiber bundle layer 13 is performed along a direction intersecting with the arrangement direction of the fiber bundles 12. According to this structure, it is excellent in formability compared with the unidirectional fabric using a fused yarn, and it is not necessary to use an expensive fused yarn. Therefore, the manufacturing cost of the fiber bundle sheet 11 can be suppressed.
　（２）繊維強化複合材料は、繊維束シート１１を積層した積層繊維束層を強化繊維基材として備えている。第１実施形態では、糸１５が直線状に延びるように、本縫いが行われる。この構成によれば、下糸１５が上糸１４と同様に屈曲して互いに交差する本縫いにより繊維束１２を結合する場合に比べて、繊維強化複合材料の物性を良くすることができる。 (2) The fiber reinforced composite material includes a laminated fiber bundle layer in which the fiber bundle sheets 11 are laminated as a reinforcing fiber base material. In the first embodiment, the main sewing is performed so that the thread 15 extends linearly. According to this configuration, the physical properties of the fiber-reinforced composite material can be improved as compared with the case where the fiber bundle 12 is joined by the main stitch that bends and intersects with the lower thread 15 in the same manner as the upper thread 14.
　（３）繊維束層１３の目付けは、０．１ｋｇ／ｍ２～２ｋｇ／ｍ２である。目付けには、繊維束１２の太さが反映される。即ち、繊維束１２が細すぎると、繊維強化複合材料の強化繊維基材に適した繊維束シート１１を得ることができない。一方、繊維束１２が太すぎても、繊維強化複合材料の強化繊維基材に適した繊維束シート１１を得ることができない。このため、繊維束層の目付けを０．１ｋｇ／ｍ２～２ｋｇ／ｍ２の範囲内に設定することにより、適切な繊維束シート１１を得ることができる。 (3) The basis weight of the fiber bundle layer 13 is 0.1 kg / m 2 to 2 kg / m 2 . The basis weight reflects the thickness of the fiber bundle 12. That is, if the fiber bundle 12 is too thin, the fiber bundle sheet 11 suitable for the reinforcing fiber substrate of the fiber-reinforced composite material cannot be obtained. On the other hand, even if the fiber bundle 12 is too thick, the fiber bundle sheet 11 suitable for the reinforcing fiber base material of the fiber-reinforced composite material cannot be obtained. Therefore, an appropriate fiber bundle sheet 11 can be obtained by setting the basis weight of the fiber bundle layer within the range of 0.1 kg / m 2 to 2 kg / m 2 .
　（４）ピッチＰを一定にして、本縫いが行われる。このため、繊維束シート１１を製造する際、本縫いの条件を同じにすることができる。つまり、本縫いのピッチＰを変更する場合に比べて、繊維束シート１１を容易に製造することができる。 (4) The main sewing is performed with the pitch P kept constant. For this reason, when manufacturing the fiber bundle sheet | seat 11, the conditions of main sewing can be made the same. That is, the fiber bundle sheet 11 can be easily manufactured as compared with the case where the pitch P of the main sewing is changed.
　（５）ピッチが１．５ｍｍ～６ｍｍとなるように、本縫いが行われる。本縫いのピッチが小さすぎると、繊維強化複合材料の強化繊維基材に適した繊維束シート１１を得ることができない。また、ピッチが大きくすぎても、繊維強化複合材料の強化繊維基材に適した繊維束シート１１を得ることができない。このため、本縫いのピッチを１．５ｍｍ～６ｍｍの範囲内に設定することにより、適切な繊維束シート１１を得ることができる。 (5) The main sewing is performed so that the pitch is 1.5 mm to 6 mm. If the pitch of the main stitch is too small, the fiber bundle sheet 11 suitable for the reinforcing fiber base material of the fiber reinforced composite material cannot be obtained. Moreover, even if the pitch is too large, the fiber bundle sheet 11 suitable for the reinforcing fiber base material of the fiber-reinforced composite material cannot be obtained. Therefore, an appropriate fiber bundle sheet 11 can be obtained by setting the pitch of the main stitching within the range of 1.5 mm to 6 mm.
　（６）上糸１４が繊維束１２の幅方向の両端で折り返されてピッチＰが設定されるように、本縫いが行われる。この構成によれば、上糸１４が繊維束１２の幅方向の中間部で折り返される場合に比べて、繊維束１２が動き易くなる。このため、繊維束シート１１の賦形性を高めることができる。 (6) The main sewing is performed so that the upper thread 14 is folded at both ends in the width direction of the fiber bundle 12 and the pitch P is set. According to this configuration, the fiber bundle 12 can move more easily than when the upper thread 14 is folded back at the intermediate portion in the width direction of the fiber bundle 12. For this reason, the shaping property of the fiber bundle sheet | seat 11 can be improved.
　（第２実施形態）
　次に、本発明を具体化した第２実施形態を図５（ａ）及び図５（ｂ）にしたがって説明する。第２実施形態は、繊維束シートの製造装置の構成について、第１実施形態と異なる。よって、第１実施形態と同一部分については同一符号を付し、詳しい説明を省略する。 (Second Embodiment)
Next, a second embodiment of the present invention will be described with reference to FIGS. 5 (a) and 5 (b). 2nd Embodiment differs from 1st Embodiment about the structure of the manufacturing apparatus of a fiber bundle sheet | seat. Therefore, the same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.
　支持枠２１は、支持枠駆動機構により、支持枠２１の長手方向にのみ移動可能である。一方、本縫いが行われる際、本縫い針２５、押さえ部材２６及び釜２７は、本縫い針２５と繊維束層１３とを係合させない状態、即ち、上昇位置に配置される。この状態で、本縫い針２５、押さえ部材２６及び釜２７は、図示しない移動装置により、支持枠２１の幅方向に沿って本縫いのピッチＰで間欠的に同時に移動する。また、１列の本縫いが完了すると、本縫い針２５、押さえ部材２６及び釜２７は、繊維束層１３と係合しない状態で、移動装置により、次の列の本縫い開始位置まで同時に移動する。 The support frame 21 can be moved only in the longitudinal direction of the support frame 21 by a support frame driving mechanism. On the other hand, when the main sewing is performed, the main sewing needle 25, the pressing member 26, and the shuttle 27 are arranged in a state where the main sewing needle 25 and the fiber bundle layer 13 are not engaged, that is, in the raised position. In this state, the main sewing needle 25, the pressing member 26, and the shuttle 27 are moved intermittently at the pitch P of the main sewing along the width direction of the support frame 21 by a moving device (not shown). When one row of main sewing is completed, the main sewing needle 25, the pressing member 26, and the shuttle 27 are simultaneously moved to the next sewing start position of the next row by the moving device without being engaged with the fiber bundle layer 13. To do.
　図５（ａ）に示すように、上側押さえ部２２ａ，２３ａは、下側押さえ部２２ｂ，２３ｂと同じ長さを有している。上側押さえ部２２ａ，２３ａは、支持枠２１の枠内において繊維束層１３と係合可能に形成されている。上側押さえ部２２ａ，２３ａは、図示しない駆動機構により、下側押さえ部２２ｂ，２３ｂの上面と上側押さえ部２２ａ，２３ａの下面とにより繊維束１２を押圧する挟持位置と、挟持位置の上方の待機位置との間を移動可能に構成されている。第１実施形態とは異なり、上側押さえ部２２ａ，２３ａ及び下側押さえ部２２ｂ，２３ｂは、支持枠２１と共に移動しない。上側押さえ部２２ａ，２３ａ及び下側押さえ部２２ｂ，２３ｂは、支持枠２１の長手方向の所定位置において挟持位置と待機位置との間を移動可能に配置されている。支持枠２１が長手方向に移動する際、上側押さえ部２２ａ，２３ａ及び下側押さえ部２２ｂ，２３ｂは待機位置に配置されている。 As shown in FIG. 5A, the upper pressing portions 22a and 23a have the same length as the lower pressing portions 22b and 23b. The upper pressing portions 22 a and 23 a are formed to be able to engage with the fiber bundle layer 13 in the frame of the support frame 21. The upper pressing portions 22a and 23a are driven by a driving mechanism (not shown) to hold the fiber bundle 12 with the upper surface of the lower pressing portions 22b and 23b and the lower surface of the upper pressing portions 22a and 23a, and to stand by above the holding position. It is configured to be movable between positions. Unlike the first embodiment, the upper pressing portions 22 a and 23 a and the lower pressing portions 22 b and 23 b do not move together with the support frame 21. The upper pressing portions 22a and 23a and the lower pressing portions 22b and 23b are arranged so as to be movable between a holding position and a standby position at a predetermined position in the longitudinal direction of the support frame 21. When the support frame 21 moves in the longitudinal direction, the upper pressing portions 22a and 23a and the lower pressing portions 22b and 23b are arranged at the standby position.
　第２実施形態において、本縫いは、図５（ａ）の実線で示す状態から開始される。この状態で、本縫い針２５及び押さえ部材２６は、繊維束層１３の幅方向の一端にそれぞれ配置されている。また、上側押さえ部２２ａ，２３ａ及び下側押さえ部２２ｂ，２３ｂは、挟持位置にそれぞれ配置されている。本縫い針２５、押さえ部材２６及び釜２７は、繊維束層１３の幅方向の他端に向けて、本縫いのピッチＰで間欠的に移動される。そして、本縫い針２５及び押さえ部材２６が図５（ａ）の二点鎖線で示す位置まで移動すると、１列分の本縫いが完了する。 In the second embodiment, the main sewing is started from the state indicated by the solid line in FIG. In this state, the main sewing needle 25 and the pressing member 26 are respectively arranged at one end in the width direction of the fiber bundle layer 13. Further, the upper pressing portions 22a and 23a and the lower pressing portions 22b and 23b are arranged at the clamping positions, respectively. The main sewing needle 25, the pressing member 26, and the shuttle 27 are moved intermittently at the pitch P of the main sewing toward the other end in the width direction of the fiber bundle layer 13. When the main sewing needle 25 and the pressing member 26 are moved to the position indicated by the two-dot chain line in FIG. 5A, the main sewing for one row is completed.
　次に、支持枠２１は、その長手方向に沿って図５（ａ）の左方へと本縫い列の間隔分だけ移動する。このとき、本縫い針２５及び押さえ部材２６は、繊維束１２と係合しない上昇位置にそれぞれ配置されている。また、上側押さえ部２２ａ，２３ａ及び下側押さえ部２２ｂ，２３ｂは、待機位置にそれぞれ配置されている。次に、上側押さえ部２２ａ，２３ａ及び下側押さえ部２２ｂ，２３ｂを挟持位置に配置した後、本縫い針２５、押さえ部材２６及び釜２７は、次の列の本縫い開始位置まで移動する。そして、次の列の本縫い開始位置で押さえ部材２６を繊維束層１３に係合した状態で、本縫いが開始される。以下、同様の手順が繰り返される。尚、本縫いは、繊維束層１３の長手方向の一端（図５（ｂ）に示す左端）で、かつ繊維束層１３の幅方向の一端（図５（ｂ）に示す上端）から開始される。そして、図５（ｂ）に矢印で示すように、本縫いは、繊維束層１３全体において１列ずつ順に形成される。 Next, the support frame 21 moves along the longitudinal direction to the left in FIG. 5A by the interval of the main sewing row. At this time, the main sewing needle 25 and the pressing member 26 are respectively disposed at the raised positions where they are not engaged with the fiber bundle 12. Further, the upper pressing portions 22a and 23a and the lower pressing portions 22b and 23b are respectively arranged at the standby positions. Next, after the upper presser portions 22a and 23a and the lower presser portions 22b and 23b are disposed in the clamping position, the main sewing needle 25, the presser member 26, and the shuttle 27 are moved to the main sewing start position of the next row. Then, the main sewing is started in a state where the pressing member 26 is engaged with the fiber bundle layer 13 at the main sewing start position of the next row. Thereafter, the same procedure is repeated. The main stitching is started from one end in the longitudinal direction of the fiber bundle layer 13 (left end shown in FIG. 5B) and one end in the width direction of the fiber bundle layer 13 (upper end shown in FIG. 5B). The And as shown by the arrow in FIG.5 (b), this stitch is formed in order one row in the fiber bundle layer 13 whole.
　以下、第２実施形態によれば、第１実施形態の（１）～（６）と同じ効果に加え、以下の効果を奏することができる。 Hereinafter, according to the second embodiment, in addition to the same effects as (1) to (6) of the first embodiment, the following effects can be achieved.
　（７）上側押さえ部２２ａ，２３ａ及び下側押さえ部２２ｂ，２３ｂは、支持枠２１の長手方向の所定位置において挟持位置と待機位置との間を移動可能に配置されている。このため、上側押さえ部２２ａ，２３ａ及び下側押さえ部２２ｂ，２３ｂを支持枠２１と共に移動させるための構成が不要になる。よって、支持枠２１への上側押さえ部２２ａ，２３ａの固定や、その固定のためのボルト２８が不要になる。また、上側押さえ部２２ａ，２３ａに切り欠き部２２ｃ，２３ｃを形成する必要も無い。 (7) The upper pressing portions 22a and 23a and the lower pressing portions 22b and 23b are arranged so as to be movable between the holding position and the standby position at predetermined positions in the longitudinal direction of the support frame 21. For this reason, the structure for moving the upper pressing parts 22a and 23a and the lower pressing parts 22b and 23b together with the support frame 21 becomes unnecessary. Therefore, the upper pressing portions 22a and 23a are not fixed to the support frame 21 and the bolts 28 for the fixing are not required. Moreover, it is not necessary to form the notches 22c and 23c in the upper pressing portions 22a and 23a.
　尚、第１及び第２実施形態は、次のように変更してもよい。 Note that the first and second embodiments may be modified as follows.
　図６（ａ）に示すように、本縫い針２５、押さえ部材２６及び釜２７を支持枠２１の幅方向の一端から他端に移動させ、１列の本縫いを完了させた後、本縫い針２５、押さえ部材２６及び釜２７を支持枠２１の幅方向の他端から一端に移動させて、次の列の本縫いを行うようにしてもよい。この場合、押さえ部材２６は、繊維束層１３に係合した状態で支持枠２１の幅方向に沿って両方向に移動可能な形状に形成される。例えば、図６（ｂ）に示すように、押さえ部材２６を円筒状に形成し、円筒状の押さえ部材２６内を本縫い針２５が移動するようにしてもよい。押さえ部材２６の下端は、繊維束層１３との摩擦抵抗を小さくするため、面取りされている。この構成は、支持枠２１がそれ自信の幅方向に移動する第１実施形態においても、本縫い針２５、押さえ部材２６及び釜２７が支持枠２１の幅方向に移動する第２実施形態においても、適用することができる。 As shown in FIG. 6A, the main sewing needle 25, the pressing member 26, and the shuttle 27 are moved from one end to the other end in the width direction of the support frame 21 to complete one row of main sewing, and then the main sewing is performed. The needle 25, the pressing member 26, and the shuttle 27 may be moved from the other end in the width direction of the support frame 21 to one end to perform the next row of main sewing. In this case, the pressing member 26 is formed in a shape that can move in both directions along the width direction of the support frame 21 while being engaged with the fiber bundle layer 13. For example, as shown in FIG. 6B, the pressing member 26 may be formed in a cylindrical shape, and the main sewing needle 25 may move in the cylindrical pressing member 26. The lower end of the pressing member 26 is chamfered to reduce the frictional resistance with the fiber bundle layer 13. This configuration is also applicable to the first embodiment in which the support frame 21 moves in the width direction of its own confidence, and also in the second embodiment in which the main sewing needle 25, the pressing member 26 and the shuttle 27 move in the width direction of the support frame 21. Can be applied.
　図７（ａ），（ｂ）に示す繊維束シート１１のように、本縫いのピッチＰを一定としつつ、隣り合う本縫いのライン間で、上糸１４の折り返し位置を半ピッチずらしてもよい。 As in the fiber bundle sheet 11 shown in FIGS. 7 (a) and 7 (b), the return position of the upper thread 14 may be shifted by a half pitch between adjacent main sewing lines while the pitch P of the main sewing is constant. Good.
　図８（ａ），（ｂ）に示す繊維束シート１１のように、繊維束層１３の幅方向の一端から他端までピッチＰが一定である本縫いの列と、繊維束層１３の幅方向の一端から他端まで小さなピッチの範囲及び大きなピッチの範囲が繰り返される本縫いの列とを、繊維束層１３の長手方向に所定間隔で形成してもよい。即ち、賦形しやすいように、部分的にスティッチ（縫合部）を省略してもよい。この場合、大きなピッチの範囲が小さなピッチの範囲に比べて繊維束シート１１の賦形性が高くなる。よって、繊維強化複合材料の形状に応じて大きなピッチの範囲と小さなピッチの範囲とを設定することにより、繊維束シート１１に対し適正な賦形性を持たせることができる。従来技術の融着糸を用いた一方向織物では、このように繊維束１２の結合を部分的に無くすことはできない。 As in the fiber bundle sheet 11 shown in FIGS. 8A and 8B, a row of main stitches having a constant pitch P from one end to the other end in the width direction of the fiber bundle layer 13, and the width of the fiber bundle layer 13 A row of main stitches in which a small pitch range and a large pitch range are repeated from one end to the other end in the direction may be formed at predetermined intervals in the longitudinal direction of the fiber bundle layer 13. That is, the stitches (stitched portions) may be partially omitted so as to facilitate shaping. In this case, the formability of the fiber bundle sheet 11 is higher in the large pitch range than in the small pitch range. Therefore, by setting a large pitch range and a small pitch range according to the shape of the fiber reinforced composite material, the fiber bundle sheet 11 can be provided with an appropriate shapeability. In the unidirectional woven fabric using the fusion yarn of the prior art, it is not possible to partially eliminate the fiber bundle 12 as described above.
　全ての緯糸に融着糸を使用する代わりに、一部の緯糸に融着糸を使用すると共に残りの緯糸に融着糸以外の糸を使用して、一方向織物を織製することも考えられる。この場合、全ての緯糸に融着糸を使用した場合に比べて、繊維束シート１１の賦形性が向上する。 Instead of using fused yarns for all wefts, it is also possible to weave unidirectional fabrics using fused yarns for some wefts and non-fused yarns for the remaining wefts. It is done. In this case, the formability of the fiber bundle sheet 11 is improved as compared with the case where fused yarns are used for all the wefts.
　図９に示すように、下糸１５の構成を変更して、本縫いを行うようにしてもよい。つまり、一般的な本縫いのように、上糸１４及び下糸１５が繊維束１２の厚さ方向の略中央で折り返されるようにしてもよい。即ち、縫い目がその表裏で同じであると共に縫い目が１縫い目ごとに独立していてもよい。 As shown in FIG. 9, the configuration of the lower thread 15 may be changed to perform the main sewing. That is, the upper thread 14 and the lower thread 15 may be folded back at substantially the center in the thickness direction of the fiber bundle 12 as in a general sewing. That is, the stitches may be the same on the front and back sides, and the stitches may be independent for each stitch.
　繊維束１２を支持枠２１に固定されたピン２４で折り返し配列した状態で、繊維束層１３を支持する構成に限らない。例えば、支持枠２１の長手方向の両側に、開繊された繊維束１２の各端部をそれぞれ接着してもよい。 The configuration is not limited to the configuration in which the fiber bundle layer 13 is supported in a state in which the fiber bundle 12 is folded back with the pins 24 fixed to the support frame 21. For example, the ends of the opened fiber bundle 12 may be bonded to both sides of the support frame 21 in the longitudinal direction.
　繊維束１２の両端を支持枠２１で支持して繊維束層１３を支持する構成に限らない。例えば、本縫いで結合すべき繊維束層１３の長さに応じて支持枠２１も大きくなり、装置全体が大型化する虞がある。こうした問題を抑制するため、開繊された繊維束１２を、回転駆動可能な一対のロール間に支持するようにしてもよい。この場合、１列の本縫いが完了したとき、繊維束層１３の次の本縫いを行う位置を、支持枠２１を長手方向に移動させる代りに、ロール回転させて本縫い針２５等と対応させることができる。そのため、支持枠２１を長手方向に移動させる構成が不要になる。よって、繊維束層１３が長くても装置全体の大型化が抑制され、装置の設置スペースも小さくなる。 It is not restricted to the structure which supports the fiber bundle layer 13 by supporting the both ends of the fiber bundle 12 with the support frame 21. For example, the support frame 21 is also increased according to the length of the fiber bundle layer 13 to be joined by the main sewing, and the entire apparatus may be increased in size. In order to suppress such a problem, the opened fiber bundle 12 may be supported between a pair of rolls that can be rotationally driven. In this case, when one row of the main stitches is completed, instead of moving the support frame 21 in the longitudinal direction, the position to perform the next main stitch of the fiber bundle layer 13 is rotated to correspond to the main sewing needle 25 and the like. Can be made. Therefore, the structure which moves the support frame 21 to a longitudinal direction becomes unnecessary. Therefore, even if the fiber bundle layer 13 is long, the enlargement of the entire apparatus is suppressed, and the installation space of the apparatus is also reduced.
　繊維束層１３は１層に限らない。例えば、複数の繊維束層１３をそれらの繊維束１２の配列方向が異なるように積層し、積層された繊維束層１３を上糸１４及び下糸１５による本縫いにより結合してもよい。また、複数の繊維束層１３をそれらの繊維束１２の配列方向が同じになるように積層してもよい。 The fiber bundle layer 13 is not limited to one layer. For example, a plurality of fiber bundle layers 13 may be laminated so that the arrangement directions of the fiber bundles 12 are different, and the laminated fiber bundle layers 13 may be joined by main stitching with the upper thread 14 and the lower thread 15. A plurality of fiber bundle layers 13 may be laminated so that the arrangement directions of the fiber bundles 12 are the same.
　上糸１４及び下糸１５として、有機繊維製の糸に限らず、ガラス繊維や炭素繊維あるいはセラミック繊維等の無機繊維を使用してもよい。しかしながら、無機繊維は有機繊維に比べて曲率の大きな曲げに弱いため、有機繊維の方が好ましい。 The upper yarn 14 and the lower yarn 15 are not limited to organic fiber yarns, and inorganic fibers such as glass fibers, carbon fibers, or ceramic fibers may be used. However, since inorganic fibers are weaker to bending with a large curvature than organic fibers, organic fibers are preferred.
　繊維束シート１１を製造する際、本縫い開始位置を、繊維束層１３の長手方向の左端から右端に変更してもよい。 When manufacturing the fiber bundle sheet 11, the main sewing start position may be changed from the left end in the longitudinal direction of the fiber bundle layer 13 to the right end.

Claims (7)

  1. 繊維束シートであって、
    　前記繊維束シートは、複数本の強化繊維である繊維束を一方向に配列して構成された少なくとも１層の繊維束層から構成され、
    　前記繊維束層は、前記繊維束を第１糸及び第２糸による本縫いにより互いに結合してシート状に形成され、
    　前記繊維束層の本縫いは、前記繊維束の配列方向と交差する方向に沿って行われることを特徴とする繊維束シート。     A fiber bundle sheet,
    The fiber bundle sheet is composed of at least one fiber bundle layer configured by arranging fiber bundles that are a plurality of reinforcing fibers in one direction,
    The fiber bundle layer is formed in a sheet shape by binding the fiber bundles together by main sewing with a first thread and a second thread,
    The fiber bundle sheet is characterized in that the main sewing of the fiber bundle layer is performed along a direction intersecting with the arrangement direction of the fiber bundles.
  2. 請求項１に記載の繊維束シートにおいて、
    　前記第２糸は、直線状に延びていることを特徴とする繊維束シート。     In the fiber bundle sheet according to claim 1,
    The fiber bundle sheet, wherein the second yarn extends linearly.
  3. 請求項１又は２に記載の繊維束シートにおいて、
    　前記繊維束層の目付けは、０．１ｋｇ／ｍ２～２ｋｇ／ｍ２である繊維束シート。     In the fiber bundle sheet according to claim 1 or 2,
    The fiber bundle sheet has a basis weight of 0.1 kg / m 2 to 2 kg / m 2 .
  4. 請求項１～３のうちいずれか一項に記載の繊維束シートにおいて、
    　前記本縫いのピッチは一定である繊維束シート。     In the fiber bundle sheet according to any one of claims 1 to 3,
    A fiber bundle sheet in which the pitch of the main sewing is constant.
  5. 請求項１～３のうちいずれか一項に記載の繊維束シートにおいて、
    　前記繊維束層の幅方向の一端から他端までピッチが一定である本縫いの列と、前記繊維束層の幅方向の一端から他端まで小さなピッチの範囲及び大きなピッチの範囲が繰り返される本縫いの列とが、前記繊維束層の直交する方向に沿って所定間隔で形成されている繊維束シート。     In the fiber bundle sheet according to any one of claims 1 to 3,
    A row of book stitches having a constant pitch from one end to the other end in the width direction of the fiber bundle layer, and a book in which a small pitch range and a large pitch range are repeated from one end to the other end in the width direction of the fiber bundle layer. A fiber bundle sheet in which sewing rows are formed at predetermined intervals along a direction perpendicular to the fiber bundle layer.
  6. 請求項１～５のうちいずれか一項に記載の繊維束シートにおいて、
    　前記本縫いのピッチは、１．５ｍｍ～６ｍｍである繊維束シート。     In the fiber bundle sheet according to any one of claims 1 to 5,
    A fiber bundle sheet having a pitch of the main stitch of 1.5 mm to 6 mm.
  7. 請求項１～６のうちいずれか一項に記載の繊維束シートにおいて、
    　前記繊維束シートは、前記繊維束の配列方向が異なる複数の繊維束層を本縫いにより互いに結合してシート状に形成されている繊維束シート。     In the fiber bundle sheet according to any one of claims 1 to 6,
    The fiber bundle sheet is a fiber bundle sheet that is formed into a sheet shape by binding a plurality of fiber bundle layers having different arrangement directions of the fiber bundles together by lock stitching.
PCT/JP2012/061895 2011-06-07 2012-05-09 Fiber bundle sheet configured of reinforced fiber WO2012169308A1 (en)

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JPH07243149A (en) * 1994-03-07 1995-09-19 Toray Ind Inc Woven fabric for one direction reinforcement
JP2004174775A (en) * 2002-11-26 2004-06-24 Mitsubishi Heavy Ind Ltd Reinforcing fiber substrate for fiber-reinforced plastic material
JP2006150904A (en) * 2004-12-01 2006-06-15 Toho Tenax Co Ltd Composite sheet and composite material having smooth surface using it
JP2008179808A (en) * 2006-12-27 2008-08-07 Japan Aerospace Exploration Agency Method for producing resin prepreg, fiber sheet for resin prepreg, resin prepreg, and composite material comprising the same
JP2009019201A (en) * 2007-06-12 2009-01-29 Toray Ind Inc Molding material, preform and fiber-reinforced resin
JP2010196176A (en) * 2009-02-21 2010-09-09 Toho Tenax Co Ltd Multiaxially stitched base and preform using the same
JP2010261143A (en) * 2009-04-09 2010-11-18 Toyota Boshoku Corp Method for producing fabric
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01225538A (en) * 1988-03-03 1989-09-08 Toray Ind Inc Preform material for composite material
JPH07243149A (en) * 1994-03-07 1995-09-19 Toray Ind Inc Woven fabric for one direction reinforcement
JP2004174775A (en) * 2002-11-26 2004-06-24 Mitsubishi Heavy Ind Ltd Reinforcing fiber substrate for fiber-reinforced plastic material
JP2006150904A (en) * 2004-12-01 2006-06-15 Toho Tenax Co Ltd Composite sheet and composite material having smooth surface using it
JP2008179808A (en) * 2006-12-27 2008-08-07 Japan Aerospace Exploration Agency Method for producing resin prepreg, fiber sheet for resin prepreg, resin prepreg, and composite material comprising the same
JP2009019201A (en) * 2007-06-12 2009-01-29 Toray Ind Inc Molding material, preform and fiber-reinforced resin
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JP2011074207A (en) * 2009-09-30 2011-04-14 Toyota Industries Corp Preform of fiber reinforced composite material and method for producing the same

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