WO2010150682A1 - Reinforcing member and fastening structure using same - Google Patents

Reinforcing member and fastening structure using same Download PDF

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Publication number
WO2010150682A1
WO2010150682A1 PCT/JP2010/060116 JP2010060116W WO2010150682A1 WO 2010150682 A1 WO2010150682 A1 WO 2010150682A1 JP 2010060116 W JP2010060116 W JP 2010060116W WO 2010150682 A1 WO2010150682 A1 WO 2010150682A1
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WO
WIPO (PCT)
Prior art keywords
hole
fastened
reinforcing
reinforcing member
fiber
Prior art date
Application number
PCT/JP2010/060116
Other languages
French (fr)
Japanese (ja)
Inventor
神谷　隆太
Original Assignee
株式会社 豊田自動織機
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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 WO2010150682A1 publication Critical patent/WO2010150682A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/06—Fibrous reinforcements only
    • B29C70/10—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres
    • B29C70/16—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length
    • B29C70/22—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length oriented in at least two directions forming a two dimensional structure
    • B29C70/222—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length oriented in at least two directions forming a two dimensional structure the structure being shaped to form a three dimensional configuration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/56—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using mechanical means or mechanical connections, e.g. form-fits
    • B29C65/562—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using mechanical means or mechanical connections, e.g. form-fits using extra joining elements, i.e. which are not integral with the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/56—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using mechanical means or mechanical connections, e.g. form-fits
    • B29C65/64—Joining a non-plastics element to a plastics element, e.g. by force
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
    • B29C65/7802—Positioning the parts to be joined, e.g. aligning, indexing or centring
    • B29C65/782—Positioning the parts to be joined, e.g. aligning, indexing or centring by setting the gap between the parts to be joined
    • B29C65/7823—Positioning the parts to be joined, e.g. aligning, indexing or centring by setting the gap between the parts to be joined by using distance pieces, i.e. by using spacers positioned between the parts to be joined and forming a part of the joint
    • B29C65/7826—Positioning the parts to be joined, e.g. aligning, indexing or centring by setting the gap between the parts to be joined by using distance pieces, i.e. by using spacers positioned between the parts to be joined and forming a part of the joint said distance pieces being non-integral with the parts to be joined, e.g. particles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/21—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being formed by a single dot or dash or by several dots or dashes, i.e. spot joining or spot welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/721—Fibre-reinforced materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/721—Fibre-reinforced materials
    • B29C66/7212—Fibre-reinforced materials characterised by the composition of the fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/721—Fibre-reinforced materials
    • B29C66/7214—Fibre-reinforced materials characterised by the length of the fibres
    • B29C66/72141—Fibres of continuous length
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7394—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoset
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7394—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoset
    • B29C66/73941—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoset characterised by the materials of both parts being thermosets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/74—Joining plastics material to non-plastics material
    • B29C66/742—Joining plastics material to non-plastics material to metals or their alloys
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/737—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined
    • B29C66/7375—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined uncured, partially cured or fully cured
    • B29C66/73751—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined uncured, partially cured or fully cured the to-be-joined area of at least one of the parts to be joined being uncured, i.e. non cross-linked, non vulcanized
    • B29C66/73752—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined uncured, partially cured or fully cured the to-be-joined area of at least one of the parts to be joined being uncured, i.e. non cross-linked, non vulcanized the to-be-joined areas of both parts to be joined being uncured
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2101/00—Use of unspecified macromolecular compounds as moulding material
    • B29K2101/10—Thermosetting resins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2305/00—Use of metals, their alloys or their compounds, as reinforcement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2307/00—Use of elements other than metals as reinforcement

Definitions

  • This invention relates to the fastening structure of the to-be-fastened member by which the reinforcing member arrange
  • the resin molded body is a lightweight structural material and may be used by being attached to other members by fastening members such as bolts and nuts.
  • the resin molding directly attached to the other member undergoes creep deformation due to the fastening force of the fastening member, and reduces the axial force of the fastening member. For this reason, when the resin molded body and another member are fastened, there is a problem that the fastening member is loosened.
  • a mounting method using a metal pipe as disclosed in Patent Document 1 is often used.
  • Patent Document 1 discloses a structure in which a housing having a rotation detection device is attached to an in-vehicle engine.
  • the housing is formed by resin molding together with a flange for attaching the housing to the vehicle-mounted engine.
  • a metal pipe is inserted into the through hole formed in the flange by insert molding, and the flange and the metal pipe are integrated.
  • the housing is attached to the engine by fastening a bolt passed through a metal pipe to a female screw of the engine.
  • Patent Document 2 discloses a fastening structure of a fiber reinforced composite material including a resin as a matrix and reinforcing fibers and another member.
  • the fiber reinforced composite material is provided with a through hole into which a bolt is inserted, and a high elastic modulus reinforcing fiber is wound concentrically with the through hole on the inner peripheral surface of the through hole.
  • Patent Document 3 discloses a structure in which a fastening member is attached to a sandwich structure plate including an elastic body formed in a plate shape and a resin layer positioned above and below the elastic body.
  • the sandwich structure plate is formed with a through hole into which a bolt is inserted.
  • a fiber reinforced composite material is attached to the inner peripheral surface of the through hole.
  • the fiber reinforced composite material includes a resin as a matrix and reinforcing fibers oriented obliquely with respect to the axial direction of the through hole.
  • the fiber reinforced composite material is formed with a flange portion extending from both ends of the through hole toward the radially outer side of the through hole. In the sandwich structure plate fastened with a bolt and a nut, the flange portion is disposed between the head of the bolt and the resin layer, and between the nut and the resin layer.
  • JP 2006-275270 A Japanese Utility Model Publication No. 63-172628 Japanese Utility Model Publication No. 2-105075
  • Patent Document 1 since the fastening force of the bolt acts only on the metal pipe and does not act on the flange formed of a resin material, the problem of loosening of the bolt due to resin creep can be solved.
  • the method of integrating the metal pipe into the through hole into which the bolt is inserted requires a high mounting accuracy of the metal pipe.
  • resin is not interposed between the end face of the metal pipe and the head of the bolt and between the end face of the metal pipe and the engine as in the invention of Patent Document 1.
  • a highly precise molding technique is required.
  • Patent Document 2 when the bolt inserted into the through hole is fastened, the reinforcing fiber is disposed on the inner peripheral surface of the through hole, so that buckling of the fiber reinforced composite material is prevented.
  • the fiber reinforced composite material there is a problem that a resin exists in a gap between the reinforcing fibers, and the bolt loosens due to the creep of the resin.
  • the reinforcing fibers are densely arranged and the amount of the resin is reduced, the reinforcing fibers come into contact with each other and the resin does not exist in the gap between the reinforcing fibers.
  • the reinforcing fibers are arranged without using a resin in this way, the reinforcing fibers are not bonded to each other.
  • Patent Document 3 a fiber reinforced composite material is disposed on the inner peripheral surface of the through hole of the sandwich structure plate. Therefore, when the bolt inserted into the through hole is fastened, creep deformation of the resin layer due to the axial force of the bolt is suppressed. Further, the periphery of the through hole is reinforced by a flange portion formed of a fiber reinforced composite material. When the sandwich structure board to which the fiber reinforced composite material is attached is fastened with bolts, the crossing angle of the reinforcing fibers obliquely oriented to each other spreads, so that the fiber reinforced composite material is deformed and the thickness (height) changes.
  • the fastening structure of the sandwich structure board is maintained by making the thickness of the fiber reinforced composite material correspond to the thickness of the sandwich structure board deformed by the axial force of the bolt. Therefore, when the fiber reinforced composite material of Patent Document 3 is applied to a through hole of a resin molded body such as a sandwich structure plate in which no elastic body exists, creep deformation of the surface of the resin molded body by fastening a bolt Following this, there is a problem that the thickness of the fiber-reinforced composite material decreases.
  • An object of the present invention is to suppress creep deformation around a through hole when a reinforcing member that is a fiber-reinforced composite material is disposed in a through hole for fastening formed in a member to be fastened that is a resin molded body. is there.
  • a reinforcing member that is formed in a member to be fastened that is a resin molded body and is disposed inside a through hole into which a fastening member can be inserted.
  • the reinforcing member is a fiber-reinforced composite material including a resin as a matrix and reinforcing fibers. At least a part of the reinforcing fiber is oriented along the axial direction of the through hole and is disposed at least from one opening to the other opening of the through hole.
  • the reinforcing member is disposed inside the through-hole in addition to the case where at least a part of the reinforcing member is in close contact with the inner peripheral surface of the through-hole without any gap, It includes a case where a gap exists between the peripheral surface and at least a part of the reinforcing member is disposed inside the through hole via the gap.
  • the reinforcing fibers are oriented along the axial direction of the through holes, the reinforcing fibers are oriented in parallel to the axial lines of the through holes, and the orientation direction of the reinforcing fibers (the direction of the fiber axis) is the through holes. This includes the case where it is slightly shifted from the axis (stress axis).
  • the angle formed by the fiber axis and the stress axis is 0 °, the compression elastic modulus of the fiber-reinforced composite material including the reinforcing fibers is maximized. If the angle formed by the fiber axis and the stress axis is small, the compression elastic modulus of the fiber-reinforced composite material is close to the maximum.
  • the compression elastic modulus of the fiber reinforced composite material when the angle between the fiber axis and the stress axis is 0 ° is 100%
  • the fiber reinforced composite when the angle between the fiber axis and the stress axis is 10 °.
  • the compression modulus of the material is 80%. Therefore, the angle formed by the orientation direction of the reinforcing fibers and the axis of the through hole is preferably within 10 °.
  • the reinforcing fiber is oriented along the axial direction of the through-hole in addition to the case where the longitudinal direction of the reinforcing fiber (the direction of the fiber axis) is oriented parallel to the axis of the through-hole.
  • the longitudinal direction of the fiber is in a direction slightly shifted from the axis of the through hole.
  • the angle formed by the longitudinal direction of the reinforcing fiber and the axis of the through hole is within 10 °.
  • the reinforcing fiber is oriented along the axial direction of the through hole and is disposed from at least one opening to the other opening of the through hole. It is oriented along the direction and is arranged without a gap. Therefore, a case where a reinforcing fiber shorter than the length of the through hole in the axial direction is arranged along the axial direction of the through hole and a region (gap) where the reinforcing fiber is not arranged between both openings of the through hole is excluded. .
  • a fastening structure for fastening a fastened member on which a reinforcing member is arranged to another member using the fastening member.
  • the member to be fastened is a resin molded body having a through hole into which the fastening member can be inserted.
  • the reinforcing member is a fiber reinforced composite material including a resin as a matrix and reinforcing fibers.
  • the reinforcing member is disposed inside the through hole. At least a part of the reinforcing fiber is oriented along the axial direction of the through hole and is disposed at least from one opening to the other opening of the through hole.
  • the schematic diagram explaining the core yarn and braiding which concern on the 1st Embodiment of this invention is a schematic diagram explaining the reinforcement member of FIG. 1, (b) is a schematic diagram explaining the end surface shape of the reinforcement member of FIG.
  • the cross-sectional schematic diagram which shows the fastening structure of the to-be-fastened member which concerns on the 2nd Embodiment of this invention.
  • the reinforcing member 1 is a fiber-reinforced composite material including a thermosetting resin as a matrix and carbon fibers as reinforcing fibers.
  • each of the plurality of core yarns 2 and each of the plurality of braids 3 is made of a bundle of carbon fibers.
  • a braided structure is formed by alternately and diagonally crossing the braids 3 oriented in different directions with respect to the core yarn 2 oriented straight.
  • the reinforcing member 1 includes a cylindrical portion 5 formed in a cylindrical shape that can be fixed to a fastening through-hole 4 shown in FIG. 3 to be described later, and a through-hole from the upper end of the cylindrical portion 5.
  • 4 includes a first flange portion 6 extending outward in the radial direction, and a second flange portion 7 extending outward in the radial direction of the through hole 4 from the lower end of the cylindrical portion 5.
  • the first flange portion 6 and the second flange portion 7 are annular.
  • the cylindrical portion 5, the first flange portion 6 and the second flange portion 7 are formed by the braided tissue described above.
  • the core yarn 2 extends from one end surface of the cylindrical portion 5 to the other end surface along the axial direction of the cylindrical portion 5.
  • the first flange portion 6 includes a circular hole 9 having a diameter into which a bolt 8 as a fastening member described later can be inserted at the center thereof.
  • the inner diameter of the circular hole 9 coincides with the inner diameter of the cylindrical portion 5 of the reinforcing member 1.
  • the first flange portion 6 has an outer diameter larger than the outer shape of the head 8 a of the bolt 8.
  • the second flange portion 7 also has the same shape and size as the first flange portion 6.
  • the fastened member 10 on which the reinforcing member 1 is disposed will be described.
  • the fastened member 10 includes a thermosetting resin as a matrix and a carbon fiber bundle 11 as a bundle-like reinforcing fiber, and is formed in a plate shape.
  • the carbon fiber bundle 11 is oriented along the X, Y, and Z axis directions orthogonal to each other, and forms a three-dimensional fiber structure.
  • a through hole 4 into which the bolt 8 is inserted is formed in the fastened member 10.
  • the cross section of the through hole 4 is formed in a circular shape having a diameter into which the bolt 8 can be inserted.
  • the cylindrical portion 5 of the reinforcing member 1 is fixed to the inner peripheral surface of the through hole 4 (the peripheral surface inside the through hole 4) without a gap. Further, the first flange portion 6 is disposed in contact with the upper surface of the fastened member 10. The second flange portion 7 is disposed in contact with the bottom surface (lower surface) of the fastened member 10.
  • the fastened member 10 is fastened with a metal material 12 as another member as follows.
  • the metal material 12 has a through hole 13 for fastening.
  • the lower surface of the fastened member 10 and the upper surface of the metal material 12 face each other, and the axis 4a of the through hole 4 and the axis 13a of the through hole 13 coincide.
  • the bolt 8 is inserted into the through-hole 4, and the seat surface of the head 8 a is disposed without protruding from the first flange portion 6.
  • the cylindrical portion 5 of the reinforcing member 1 is disposed in a region facing the bolt 8 on the inner peripheral surface of the through hole 4.
  • the core yarn 2 is oriented along the direction of the axis 4 a of the through hole 4.
  • the cylindrical part 5 has a length longer than the plate thickness of the fastened member 10.
  • the core yarn 2 extends from one opening of the through hole 4 to the other opening.
  • the second flange portion 7 is sandwiched between the fastened member 10 and the metal material 12.
  • the tip of the bolt 8 protrudes below the metal material 12 through the through hole 13 and is tightened by a nut 14.
  • a method for manufacturing the reinforcing member 1 and the fastened member 10 will be described.
  • a carbon fiber bundle 11 and a flat support (not shown) are prepared.
  • a pipe having a diameter into which the shaft portion of the bolt 8 can be inserted is arranged at a predetermined position of the support so as to extend in a direction perpendicular to the plane of the support (Z-axis direction).
  • pins are arranged on the support so as to extend in a direction (Z-axis direction) perpendicular to the plane of the support at a predetermined pitch.
  • the reinforcing fiber layer is laminated in the Z-axis direction to form a laminated yarn group in which the carbon fiber bundles 11 are oriented along the X and Y axes.
  • the pin is removed from the support, and the pin is replaced with a thickness direction yarn (vertical yarn) oriented along a direction (Z-axis direction) orthogonal to the carbon fiber bundle 11 forming the laminated yarn group.
  • the laminated yarn group is bonded by a thickness direction yarn.
  • the pipe is removed from the support to form a three-dimensional fiber structure including carbon fiber bundles 11 extending in the X, Y, and Z axis directions orthogonal to each other.
  • the three-dimensional fiber structure is a carbon fiber bundle 11 having a three-dimensional structure before the resin is impregnated in the fastened member 10.
  • a through hole 4 is formed in the region where the pipe of the three-dimensional fiber structure is removed.
  • core yarn 2 and braid 3 are prepared.
  • a cylindrical core member having an outer diameter corresponding to the hole diameter into which the shaft portion of the bolt 8 can be inserted is prepared.
  • the braid is placed on the outer periphery of the core material with the core material placed at the center (axis of the braid-like tissue to be formed) of the three-dimensional braider (rotor carrier type three-dimensional woven loom) that is a device for forming the braided tissue.
  • the braided structure is an aggregate including the core yarn 2 and the braid 3 before the reinforcing member 1 is impregnated with resin.
  • the core yarn 2 is arranged so as to extend along the axial direction (Z-axis direction) of the core material, and the braid 3 is arranged so as to extend along two axial directions of the A axis and the B axis.
  • the A and B axes are axes that are inclined with respect to the direction in which the core yarn 2 extends (Z-axis direction) and that extend in directions intersecting each other.
  • a braided structure is formed by combining the core yarn 2 and the braid 3 while holding the core yarn 2 so as to extend in the Z-axis direction by a three-dimensional blader.
  • the braided tissue is formed so that the length in the Z-axis direction corresponds to the height of the through hole 4.
  • the braided tissue is formed so that the outer periphery of the braided tissue has a shape and size corresponding to the inner periphery of the through hole 4.
  • the core material is removed from the braided tissue to obtain a braided cylindrical portion which is a cylindrical braided tissue.
  • the braided cylindrical portion corresponds to the cylindrical portion 5 in the reinforcing member 1 and is a carbon fiber formed in a braided shape before being impregnated with resin.
  • a braided flange portion which is an annular braided structure, is formed continuously with the braided cylindrical portion at the upper and lower ends of the braided cylindrical portion.
  • the braid flange portion corresponds to the first flange portion 6 and the second flange portion 7 in the reinforcing member 1 and is a carbon fiber formed in a braid shape before being impregnated with resin.
  • the braided flange portion is formed continuously with the braided cylindrical portion by combining the core yarn 2 and the braided yarn 3 continuous from the upper end and the lower end of the braided cylindrical portion.
  • the braided tissue is inserted into the through-hole 4 of the three-dimensional fiber structure, and the end of the braided tissue is protruded from the through-hole 4 of the three-dimensional fiber structure.
  • the braided flange portion is bent so as to pass through the through hole 4.
  • the braided cylindrical portion is arranged corresponding to the inner peripheral surface of the through-hole 4, and the braided flange portion is arranged at the upper and lower ends of the through-hole 4 in the three-dimensional fiber structure.
  • the braided flange portion is expanded to the original shape (annular shape) at the upper end and the lower end of the through hole 4.
  • the braid flange portion is arranged in contact with the three-dimensional fiber structure in all regions.
  • the braided structure fixed to the three-dimensional fiber structure is formed into a formed body using a forming die.
  • the molding die includes an upper die and a lower die, and includes a pressure reducing passage for decompressing the inside of the die and a resin injection passage for injecting resin into the die.
  • a columnar convex portion having a cross-sectional shape corresponding to the inner diameter of the braided cylindrical portion of the braided tissue is formed on the lower mold.
  • the braided tissue is disposed on the lower mold so that the braided cylindrical portion surrounds the convex portion and is in contact with the convex portion.
  • a thermosetting resin is injected into the die to impregnate the three-dimensional fiber structure and braided structure.
  • the mold is heated by a heating means (not shown), and the three-dimensional fiber structure and braided structure are heated to a temperature equal to or higher than the thermosetting temperature of the resin to cure the impregnated resin.
  • the mold is opened, and the molded body in which the resin is cured is taken out from the lower mold.
  • the molded body is a fiber-reinforced composite material including a three-dimensional fiber structure, a braided structure, and a resin. That is, the molded body includes the fastened member 10 and the reinforcing member 1 that are integrally formed.
  • the reinforcing member 1 and the fastened member 10 in the first embodiment will be described.
  • the reinforcing member 1 is fixed to the inner peripheral surface of the through hole 4 of the fastened member 10.
  • the core yarn 2 is oriented along the direction of the axis 4 a of the through hole 4 (plate thickness direction of the member to be fastened 10), and extends at least from one opening to the other opening of the through hole 4. It extends continuously.
  • the core yarn 2 is in contact with the head 8 a of the bolt 8 and the metal material 12.
  • the orientation direction of the core yarn 2 is the same as the direction of the stress acting on the fastened member 10. That is, the angle formed by the fiber axis and the stress axis is 0 °.
  • the axial force due to the fastening of the bolt 8 is the core yarn 2 on the inner peripheral surface of the through hole 4.
  • the compression elastic modulus is about 40 times larger. Therefore, resin creep of the fastened member 10 due to the fastening force of the bolt 8 is suppressed, and deformation of the fastened member 10 can be prevented.
  • the extension region along the axis 4a of the head 8a of the bolt 8 is a stress acting region in which creep is likely to occur due to the stress caused by the fastening force received from the head 8a.
  • the stress acting on the portion closest to the head 8a of the bolt 8 in the stress acting region is equal to the stress acting on the portion away from the portion. Therefore, if at least the core yarn 2 inside the through-hole 4 is oriented along the direction of the axis 4a of the through-hole 4 and arranged from one opening to the other opening, along the direction of the axis 4a. Even if the oriented core yarn 2 is not in the first flange portion 6 that contacts the head 8 a of the bolt 8, the fastening force of the bolt 8 applied to the stress acting region is sufficiently received by the core yarn 2 inside the through hole 4. be able to.
  • the fastened member 10 contains a carbon fiber bundle 11 in addition to the resin.
  • the member 10 to be fastened has a smaller amount of resin that causes creep than the case where the carbon fiber bundle 11 is not contained. Therefore, the effect of suppressing creep can be enhanced by using the fastened member 10 containing the carbon fiber bundle 11 as the fastened member to which the reinforcing member 1 is fastened.
  • the reinforcing member 1 In order to closely attach the reinforcing member 1 to the inner peripheral surface of the through hole 4 without a gap, it is necessary to form the outer periphery of the cylindrical portion 5 in a circular shape.
  • the carbon fiber which is a fabric-like woven fabric is formed into a cylindrical shape, it is necessary to sew and join the ends of the woven fabric, and a seam is generated at the joined portion.
  • the reinforcing member 1 is seamless since there is no end portion to be joined. It can be formed in a cylindrical shape. Therefore, the reinforcing member 1 can be closely attached to the inner peripheral surface of the through hole 4 without a gap.
  • the cylindrical part 5 and the 1st flange part 6 and the cylindrical part 5 and the 2nd flange part 7 can be formed continuously by forming the reinforcement member 1 with a braided structure
  • the carbon fiber In order to enhance the creep suppressing effect, at least a part of the carbon fibers needs to be oriented along the direction of the axis 4 a of the through hole 4 in the region including the inside of the through hole 4. Therefore, it is desirable that the carbon fiber can be arranged so that the orientation of the carbon fiber is stable.
  • a braided structure is formed by assembling the core yarn 2 and the braid 3 that are carbon fibers
  • the core yarn 2 is fixed by the braid 3 that is obliquely oriented with respect to the core yarn 2. The position and direction of 2 can be stabilized. Therefore, the core yarn 2 can be stably arranged in the reinforcing member 1 along the direction of the axis 4a of the through hole 4, and the creep suppressing effect of the fastened member 10 can be enhanced.
  • the force from the head 8 a of the bolt 8 is not applied directly to the interface but is distributed by the first flange portion 6 and the second flange portion 7. Therefore, it is possible to prevent a crack or a crack from occurring at the interface between the reinforcing member 1 and the fastened member 10.
  • the reinforcing member 1 is fixed to the inner peripheral surface of the through hole 4, and the fastened member 10 is fastened to the metal material 12 by a bolt 8 inserted into the through hole 4. Since the reinforcing member 1 is fixed to the inner peripheral surface of the through hole 4, loosening of the bolt 8 can be suppressed when the fastened member 10 and the metal material 12 are fastened by the bolt 8.
  • the reinforcing member 1 and the fastened member 10 are integrally formed by impregnating the resin after the braided structure is combined with the three-dimensional fiber structure. Therefore, the reinforcing member 1 provided with the first flange portion 6 and the second flange portion 7 can be fixed to the through hole 4 of the fastened member 10. Furthermore, since it is not necessary to press-fit the reinforcing member 1 into the through-hole 4, it is not necessary to increase the processing accuracy of the through-hole 4 and the press-fitting accuracy of the reinforcing member 1, and the processing becomes easy.
  • Reinforcing member 1 includes resin and carbon fiber and is not a metal member. Therefore, the increase in the weight in a fastening structure which arises when attaching a metal pipe to a to-be-fastened member like patent document 1 can be prevented.
  • a separate metal member is integrated with the member to be fastened, a highly precise molding technique is required, whereas it is difficult to integrate the nonmetallic reinforcing member 1 with the member to be fastened. It can be easily carried out without requiring an accurate molding technique.
  • the fastened member 10 to which the non-metallic reinforcing member 1 is fixed it is not necessary to separate another metal member from the fastened member when the fastened member is discarded. Cost can be reduced.
  • the fastened member 10 is molded by a molding die having a convex portion which is a column having a cross-sectional shape corresponding to the cylindrical portion 5.
  • a through-hole 4 for fastening is formed in the region corresponding to the convex portion of the fastened member 10 at the stage of molding. Therefore, it is not necessary to form the fastening through hole 4 in the molded member to be fastened 10 using, for example, a tool, and thus the tool is not damaged.
  • the first embodiment described above has the following advantages.
  • (1) The reinforcing member 1 having the through hole 4 and having a higher compression elastic modulus than the thermosetting resin is fixed to the inner peripheral surface of the through hole 4 of the member to be fastened 10.
  • the core yarn 2 is oriented along the direction of the axis 4 a of the through hole 4 and is continuously disposed from at least one opening of the through hole 4 to the other opening. Since the compression elastic modulus of the reinforcing member 1 when the core yarn 2 is oriented along the direction of the axis 4a of the through hole 4 is larger than the compression elastic modulus of the thermosetting resin, the bolt 8 is inserted into the through hole 4.
  • creep deformation of the member to be fastened 10 due to the fastening force of the bolt 8 can be suppressed.
  • the fastened member 10 contains the carbon fiber bundle 11
  • the amount of resin that causes creep is smaller than that of the fastened member that does not contain the carbon fiber bundle 11. Therefore, the creep suppressing effect of the fastened member 10 can be enhanced.
  • the braided structure is formed by the core yarn 2 and the braid 3 which are carbon fibers, the carbon fibers can be seamlessly formed in a cylindrical shape, and the reinforcing member 1 is securely adhered to the inner peripheral surface of the through hole 4 Can be made.
  • the reinforcing member 1 is formed of a braided structure composed of the core yarn 2 and the braided yarn 3. Therefore, the core yarn 2 can be stably disposed in the reinforcing member 1 so as to extend along the direction of the axis 4 a of the through hole 4, and the creep suppressing effect of the fastened member 10 can be enhanced.
  • the member to be fastened 10 is fastened to the metal member 12 by inserting the bolt 8 into the through hole 4 of the member to be fastened 10 via the reinforcing member 1. Therefore, loosening of the bolt 8 when the fastened member 10 is fastened to the metal material 12 can be suppressed.
  • the reinforcing member 1 is integrally formed with the fastened member 10. Therefore, it is not necessary to press-fit the reinforcing member 1 into the fastened member 10, and the processing accuracy of the through holes 4 formed in the fastened member 10 and the press-fit accuracy of the reinforcing member 1 do not have to be increased.
  • the fastening member 10 has a through-hole 4 for fastening in a region corresponding to the convex portion of the lower mold of the molding die at the time of molding. Therefore, it is not necessary to separately form the through-hole 4 for fastening in the to-be-fastened member 10 after molding.
  • the cylindrical portion 5 and the first flange portion 6 and the cylindrical portion 5 and the second flange portion 7 can be formed continuously. .
  • the fastening force of the bolt 8 can be dispersed by the first flange portion 6 and the second flange portion 7. It is possible to prevent cracks and cracks from occurring at the interface between the reinforcing member 1 and the fastened member 10 disposed on the inner peripheral surface.
  • the fastened member 10 and the reinforcing member 1 are formed integrally, it is not necessary to fit the reinforcing member 1 into the through hole 4 of the fastened member 10. Therefore, the reinforcing member 1 provided with the first flange portion 6 and the second flange portion 7 can be fixed to the inner peripheral surface of the through-hole 4 of the fastened member 10.
  • the second embodiment shown in FIGS. 4 and 5 is the same as the first embodiment except that the shape of the reinforcing member 1 in the first embodiment and the orientation direction of the core yarn 2 in the reinforcing member 1 are changed.
  • the same reference numerals are given to the configurations, and detailed description is omitted.
  • the reinforcing member 15 is formed in a cylindrical shape.
  • the cylindrical reinforcing member 15 corresponds to the cylindrical portion 5 of the reinforcing member 1 in the first embodiment.
  • the braid 17 has the same thickness as the core yarn 16, and a braid-like structure is formed by the braid 17 being alternately and obliquely intersected with the core yarn 16.
  • the core yarn 16 is bent at a portion where it is combined with the braid 17 and is not shown.
  • the core yarn 16 is oriented such that its longitudinal direction is inclined by 5 ° with respect to a cylindrical axis (an axis 20a of a through-hole 20 described later). Note that the longitudinal direction of the core yarn 16 refers to the direction in which the core yarn 16 is oriented except for the bent portion of the core yarn 16.
  • the fastened member 18 is a fiber-reinforced composite material including a thermosetting resin as a matrix and a carbon fiber bundle 19.
  • the fastened member 18 is formed in a plate shape, and the carbon fiber bundle 19 has a three-dimensional structure in which the fiber bundles are oriented along the X, Y, and Z axis directions orthogonal to each other.
  • a fastening through hole 20 is formed in the fastened member 18.
  • the outer peripheral surface of the reinforcing member 15 has a shape corresponding to the inner peripheral surface of the through hole 20 of the fastened member 18.
  • the molded reinforcing member 15 is attached to the inner peripheral surface of the through hole 20.
  • the reinforcing member 15 is disposed in the through hole 20 in a state where a gap (not shown) required for fitting is formed between the inner peripheral surface of the through hole 20 and the outer peripheral surface of the reinforcing member 15.
  • the fastened member 18 and the metal material 21 are arranged so that the lower surface of the fastened member 18 and the upper surface of the metal material 21 are in contact with each other.
  • the axis 22a of the hole 22 coincides.
  • Bolts 23 are inserted into the through holes 20 and 22, and the fastened member 18 and the metal material 21 are fastened by bolts 23 and nuts 24.
  • the following advantages can be obtained in addition to the advantages similar to (1) to (8) in the first embodiment.
  • the material and the processing cost required for forming the first flange portion 6 and the second flange portion 7 are reduced. can do.
  • the molded reinforcing member 15 can be easily fitted into the through hole 20 of the fastened member 18.
  • the present invention is not limited to the configuration of each of the embodiments described above, and various modifications are possible within the scope of the gist of the present invention, and can be implemented as follows.
  • the reinforcing fibers constituting the fastened members 10 and 18 and the reinforcing members 1 and 15 may not be carbon fibers, and may be glass fibers, for example.
  • the type of reinforcing fiber used for the fastened members 10 and 18 and the reinforcing members 1 and 15 may not be one.
  • a plurality of types of reinforcing fibers may be used such that the core yarns 2 and 16 are carbon fibers and the braided yarns 3 and 17 are glass fibers.
  • a thread sufficiently thinner than the core threads 2 and 16 may be used for the braiding threads 3 and 17 in the reinforcing members 1 and 15. In that case, bending of the core yarns 2 and 16 caused by combining the braid yarns 3 and 17 and the core yarns 2 and 16 can be reduced.
  • the flange portion 6 does not have to be in an annular shape as long as the seating surface of the head 8a of the bolt 8 can be arranged without protruding from the first flange portion 6.
  • the diameter of the first flange portion 6 is smaller than the diameter of the head portion 8a of the bolt 8, there is a high possibility that the head portion 8a of the bolt 8 and the member to be fastened 10 come into contact with each other and the member to be fastened 10 undergoes creep deformation. Become.
  • the diameter of the 1st flange part 6 is too large, there exists a problem that a weight increases. For this reason, it is desirable that the diameter of the first flange portion 6 is slightly larger than the diameter of the head 8 a of the bolt 8.
  • the first flange portion 6 and the second flange portion 7 of the reinforcing member 1 are formed continuously with the cylindrical portion 5 when formed into a braided structure by the core yarn 2 and the braided yarn 3. It does not have to be.
  • the cylindrical portion 5 and the first flange portion 6 or the cylindrical portion 5 and the second flange portion 7 are separately formed by bundle-like reinforcing fibers, the cylindrical portion 5 and the first flange portion 6 are made of resin.
  • the cylindrical portion 5 and the second flange portion 7 may be joined.
  • the reinforcing member 1 does not necessarily include the first flange portion 6 and the second flange portion 7.
  • the reinforcing member 1 may include only one of the first flange portion 6 and the second flange portion 7, and may not include both the first flange portion 6 and the second flange portion 7.
  • the shape of the second flange portion 7 may not be an annular shape.
  • the second flange portion 7 may have a smaller diameter than the head 8 a of the bolt 8.
  • the first flange portion 6 and the second flange portion 7 may not be disposed so as to protrude from the surface of the fastened member 10.
  • the thickness of the periphery of the through hole 4 may be reduced by the thickness of the first flange portion 6 and the second flange portion 7.
  • the surface of the to-be-fastened member 10 and the surface of the 1st flange part 6 and the 2nd flange part 7 are arrange
  • the fiber volume content (Vf) is increased around the through hole 4 of the fastened member 10 as disclosed in Japanese Patent Application Laid-Open No. 2007-268941, so that the creep suppressing effect is enhanced.
  • the fastening member with which the first flange portion 6 abuts may not be the bolt 8.
  • the bolt 8 when the bolt 8 is inserted from the through hole 13 side of the metal material 12 and the nut 14 is fastened to the tip of the bolt 8 protruding from the upper end of the through hole 4 of the member 10 to be fastened, the first flange portion 6 and the nut 14 may be in contact with each other.
  • the reinforcing member 1 and the fastened member 10 do not have to be formed integrally.
  • the reinforcing member 1 and the fastened member 10 may be formed separately, and the reinforcing member 1 may be fitted into the through hole 4 formed in the fastened member 10 after molding.
  • the manufacturing method of the reinforcing member 1 and the fastened member 10 is not limited to the method described in the first embodiment, and the conventional manufacturing method of the fiber-reinforced composite material, the manufacturing method of the braided tissue, and the tertiary You may manufacture with the manufacturing method of an original fabric.
  • the fastened members 10 and 18 on which the reinforcing members 1 and 15 are disposed may not contain reinforcing fibers.
  • the fastened members 10 and 18 may be resin molded bodies, for example.
  • the carbon fibers are braided. It does not have to be formed in the organization.
  • the reinforcing member may be formed of a plain weave or bag-woven fabric.
  • a reinforcing member is molded using a mold having a convex portion having a shape corresponding to the through hole, carbon fibers are attached to the outer peripheral surface of the convex portion so as to extend along the axial direction of the through hole.
  • the reinforcing member may be molded by injecting resin in a state. Thereby, a bundle-like carbon fiber can be arrange
  • the through holes 4 and 20 may not be formed at the same time when the members to be fastened 10 and 18 are formed.
  • the through holes 4 and 20 may be formed by drilling the fastened members 10 and 18 after molding with a tool such as a drill. Further, after drilling, external processing such as deburring around the through hole 4 and cutting of unnecessary portions may be performed.
  • the carbon fiber bundles 11 and 19 of the fastened members 10 and 18 may not be oriented so as to form a three-dimensional structure.
  • the carbon fiber bundles 11 and 19 may be oriented so as to form a two-dimensional structure, or the carbon fiber bundles 11 and 19 may be oriented along one direction.
  • the other members fastened to the fastened members 10 and 18 may not be the metal materials 12 and 20.
  • the other member to be fastened to the fastened members 10 and 20 may be a fiber reinforced composite material or a resin molded body, or may be a rock that constitutes a wall, a floor, or the ground.
  • the other members to be fastened to the fastened members 10 and 20 may have other shapes such as a rod shape or a column shape instead of the plate shape.
  • the diameters of the core yarns 2 and 16 and the diameters of the braids 3 and 17 may be different.
  • the braid 3 may be a thread sufficiently thinner than the core thread 2.
  • the core yarn can be oriented straight along the axial direction of the through hole.
  • the core yarn continuously arranged from one opening portion of the through holes 4 and 20 to the other opening portion may not be one core yarn.
  • a plurality of core yarns may be connected along the axial direction of the through hole, so that the core yarn may be arranged at least from one opening portion of the through holes 4 and 20 to the other opening portion without a gap. .
  • the core yarn 16 may not be oriented with an inclination of 5 ° with respect to the axis 20a of the through hole 20.
  • the core yarn 16 may be inclined by 10 ° with respect to the axis 20 a of the through hole 20, or the core yarn 16 is in the direction of the axis 20 a of the through hole 20 (the fiber axis of the core yarn 16 and the axis of the through hole 20 are (The direction in which the angle formed is 0 °) may be oriented.
  • the angle formed by the core yarn 16 and the axis 20a of the through hole 20 is within 10 °.
  • the core yarn 16 may not be bent, and for example, the core yarn 16 may have a straight shape.
  • the reinforcing member 15 and the fastened member 18 do not have to be formed separately.
  • the reinforcing member 15 and the fastened member 18 may be integrally formed.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Moulding By Coating Moulds (AREA)
  • Connection Of Plates (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

Provided is a reinforcing member (1) disposed inside a through-hole (4), formed in a resin-molded fastened member (10), into which a fastening member (8) can be inserted. The reinforcing member (1) is a fiber-reinforced composite containing a resin matrix and reinforcing fibers (11). At least some of the reinforcing fibers (11) are oriented along the axial direction of the through-hole (4) and extend at least from one opening of the through-hole (4) to the other opening thereof.

Description

補強部材及びその補強部材を用いた締結構造Reinforcing member and fastening structure using the reinforcing member
　本発明は、樹脂成形体である被締結部材に配置される補強部材及び補強部材が配置された被締結部材の締結構造に関する。 This invention relates to the fastening structure of the to-be-fastened member by which the reinforcing member arrange | positioned at the to-be-fastened member which is a resin molding, and the reinforcing member is arrange | positioned.
　樹脂成形体は軽量の構造材であり、ボルト及びナット等の締結部材により他の部材に取り付けて使用される場合がある。しかし、他の部材に直接取り付けられた樹脂成形体は締結部材の締結力によりクリープ変形を生じ、締結部材の軸力を低下させる。そのために、樹脂成形体と他の部材とを締結した場合、締結部材の緩みが生じるという問題がある。このような問題を解消するため、一般的には、例えば特許文献１に開示されているような金属パイプを用いた取り付け方法が多く用いられている。 The resin molded body is a lightweight structural material and may be used by being attached to other members by fastening members such as bolts and nuts. However, the resin molding directly attached to the other member undergoes creep deformation due to the fastening force of the fastening member, and reduces the axial force of the fastening member. For this reason, when the resin molded body and another member are fastened, there is a problem that the fastening member is loosened. In order to solve such a problem, in general, for example, a mounting method using a metal pipe as disclosed in Patent Document 1 is often used.
　特許文献１は、回転検出装置を有するハウジングが車載エンジンに取り付けられた構造を開示している。ハウジングは、同ハウジングを車載エンジンへ取り付けるためのフランジとともに樹脂成形によって形成されている。フランジに形成された貫通孔には、金属パイプがインサート成形により挿入され、フランジと金属パイプとが一体化されている。ハウジングは、金属パイプに通したボルトをエンジンの雌ネジに締結することによりエンジンに取り付けられている。 Patent Document 1 discloses a structure in which a housing having a rotation detection device is attached to an in-vehicle engine. The housing is formed by resin molding together with a flange for attaching the housing to the vehicle-mounted engine. A metal pipe is inserted into the through hole formed in the flange by insert molding, and the flange and the metal pipe are integrated. The housing is attached to the engine by fastening a bolt passed through a metal pipe to a female screw of the engine.
　特許文献２は、マトリックスとしての樹脂と強化繊維とを含む繊維強化複合材と、他の部材との締結構造を開示している。繊維強化複合材にはボルトが挿入される貫通孔が備えられており、貫通孔の内周面には高弾性率の強化繊維が貫通孔と同心円状に巻きつけられている。 Patent Document 2 discloses a fastening structure of a fiber reinforced composite material including a resin as a matrix and reinforcing fibers and another member. The fiber reinforced composite material is provided with a through hole into which a bolt is inserted, and a high elastic modulus reinforcing fiber is wound concentrically with the through hole on the inner peripheral surface of the through hole.
　特許文献３は、板状に形成された弾性体と該弾性体の上下に位置する樹脂層とを含むサンドイッチ構造板に、締結部材が取り付けられた構造を開示している。サンドイッチ構造板にはボルトが挿入される貫通孔が形成されている。貫通孔の内周面には繊維強化複合材が取り付けられている。繊維強化複合材はマトリックスとしての樹脂と、貫通孔の軸線方向に対して斜めに配向された強化繊維とを含む。繊維強化複合材には、貫通孔の両端から貫通孔の径方向外側に向かって延びるフランジ部が形成されている。ボルト及びナットで締結されたサンドイッチ構造板において、フランジ部は、ボルトの頭部と樹脂層との間、及びナットと樹脂層との間に配置されている。 Patent Document 3 discloses a structure in which a fastening member is attached to a sandwich structure plate including an elastic body formed in a plate shape and a resin layer positioned above and below the elastic body. The sandwich structure plate is formed with a through hole into which a bolt is inserted. A fiber reinforced composite material is attached to the inner peripheral surface of the through hole. The fiber reinforced composite material includes a resin as a matrix and reinforcing fibers oriented obliquely with respect to the axial direction of the through hole. The fiber reinforced composite material is formed with a flange portion extending from both ends of the through hole toward the radially outer side of the through hole. In the sandwich structure plate fastened with a bolt and a nut, the flange portion is disposed between the head of the bolt and the resin layer, and between the nut and the resin layer.
特開２００６－２７５２７０号公報JP 2006-275270 A 実開昭６３－１７２６２８号公報Japanese Utility Model Publication No. 63-172628 実開平２－１０５０７５号公報Japanese Utility Model Publication No. 2-105075
　特許文献１では、ボルトの締結力は金属パイプにのみ作用し、樹脂材料で成形されたフランジには作用しないため、樹脂のクリープによるボルトの緩みの問題を解消することができる。しかし、ボルトが挿入される貫通孔に金属パイプを一体化する方法は金属パイプの高い取り付け精度を必要とする。例えば、金属パイプを前記フランジにインサート成形する場合は、特許文献１の発明のように、金属パイプの端面とボルトの頭部との間及び金属パイプの端面とエンジンとの間に樹脂が介在されないように精度の高い成形技術が必要となる。また、金属パイプを貫通孔に圧入する方法では、貫通孔の精度や金属パイプの圧入精度を高める必要があるため、加工工数が増加し、加工作業も煩雑になる。また、金属パイプの使用は重量増加に繋がり、樹脂材料による軽量化という利点を阻害することにもなる。 In Patent Document 1, since the fastening force of the bolt acts only on the metal pipe and does not act on the flange formed of a resin material, the problem of loosening of the bolt due to resin creep can be solved. However, the method of integrating the metal pipe into the through hole into which the bolt is inserted requires a high mounting accuracy of the metal pipe. For example, when insert-molding a metal pipe into the flange, resin is not interposed between the end face of the metal pipe and the head of the bolt and between the end face of the metal pipe and the engine as in the invention of Patent Document 1. Thus, a highly precise molding technique is required. Moreover, in the method of press-fitting a metal pipe into a through hole, it is necessary to increase the accuracy of the through hole and the press-fitting accuracy of the metal pipe. In addition, the use of metal pipes leads to an increase in weight, which also hinders the advantage of weight reduction by the resin material.
　特許文献２では、貫通孔に挿入されたボルトを締結した場合、貫通孔の内周面に強化繊維が配置されているため、繊維強化複合材の座屈が防止される。しかし、繊維強化複合材において、強化繊維間の隙間には樹脂が存在し、この樹脂がクリープすることでボルトが緩むという問題がある。また、強化繊維を密に配置し樹脂の量を少なくした場合には、強化繊維同士が接触して強化繊維間の隙間に樹脂が存在しなくなる。このように強化繊維同士が樹脂を介さずに配置されると、強化繊維同士が接着されない。 In Patent Document 2, when the bolt inserted into the through hole is fastened, the reinforcing fiber is disposed on the inner peripheral surface of the through hole, so that buckling of the fiber reinforced composite material is prevented. However, in the fiber reinforced composite material, there is a problem that a resin exists in a gap between the reinforcing fibers, and the bolt loosens due to the creep of the resin. Further, when the reinforcing fibers are densely arranged and the amount of the resin is reduced, the reinforcing fibers come into contact with each other and the resin does not exist in the gap between the reinforcing fibers. When the reinforcing fibers are arranged without using a resin in this way, the reinforcing fibers are not bonded to each other.
　特許文献３では、サンドイッチ構造板の貫通孔の内周面に繊維強化複合材が配置されている。そのため、貫通孔に挿入されたボルトを締結した場合、ボルトの軸力による樹脂層のクリープ変形が抑制される。また、繊維強化複合材から形成されたフランジ部により貫通孔の周囲が補強される。繊維強化複合材が取り付けられたサンドイッチ構造板をボルトで締結した場合、互いに斜めに配向された強化繊維の交差角が広がるために繊維強化複合材が変形され厚み（高さ）が変化する。特許文献３では、繊維強化複合材の厚みを、ボルトの軸力により変形されたサンドイッチ構造板の厚みと対応させることで、サンドイッチ構造板の締結構造を維持している。そのため、内部に弾性体が存在しないサンドイッチ構造板のような樹脂成形体の貫通孔に特許文献３の繊維強化複合材を適用した場合は、ボルトを締結することによる樹脂成形体の表面のクリープ変形に追随して繊維強化複合材の厚みが減少するという問題がある。 In Patent Document 3, a fiber reinforced composite material is disposed on the inner peripheral surface of the through hole of the sandwich structure plate. Therefore, when the bolt inserted into the through hole is fastened, creep deformation of the resin layer due to the axial force of the bolt is suppressed. Further, the periphery of the through hole is reinforced by a flange portion formed of a fiber reinforced composite material. When the sandwich structure board to which the fiber reinforced composite material is attached is fastened with bolts, the crossing angle of the reinforcing fibers obliquely oriented to each other spreads, so that the fiber reinforced composite material is deformed and the thickness (height) changes. In patent document 3, the fastening structure of the sandwich structure board is maintained by making the thickness of the fiber reinforced composite material correspond to the thickness of the sandwich structure board deformed by the axial force of the bolt. Therefore, when the fiber reinforced composite material of Patent Document 3 is applied to a through hole of a resin molded body such as a sandwich structure plate in which no elastic body exists, creep deformation of the surface of the resin molded body by fastening a bolt Following this, there is a problem that the thickness of the fiber-reinforced composite material decreases.
　本発明の目的は、樹脂成形体である被締結部材に形成された締結用の貫通孔に繊維強化複合材である補強部材が配置される場合において、貫通孔周囲のクリープ変形を抑制することにある。 An object of the present invention is to suppress creep deformation around a through hole when a reinforcing member that is a fiber-reinforced composite material is disposed in a through hole for fastening formed in a member to be fastened that is a resin molded body. is there.
　上記目的を達成するため、本発明の一態様では、樹脂成形体である被締結部材に形成されて締結部材が挿入可能な貫通孔の内部に配置される補強部材が提供される。補強部材は、マトリックスとしての樹脂と強化繊維とを含む繊維強化複合材である。前記強化繊維の少なくとも一部は、前記貫通孔の軸線方向に沿って配向されかつ少なくとも前記貫通孔の一方の開口部から他方の開口部に亘って配置される。 In order to achieve the above object, according to one aspect of the present invention, there is provided a reinforcing member that is formed in a member to be fastened that is a resin molded body and is disposed inside a through hole into which a fastening member can be inserted. The reinforcing member is a fiber-reinforced composite material including a resin as a matrix and reinforcing fibers. At least a part of the reinforcing fiber is oriented along the axial direction of the through hole and is disposed at least from one opening to the other opening of the through hole.
　なお、補強部材が貫通孔の内部に配置されるとは、少なくとも一部の補強部材が貫通孔の内周面に隙間なく密着している場合に加え、補強部材の外周面と貫通孔の内周面との間に隙間が存在し、隙間を介して少なくとも補強部材の一部が貫通孔の内部に配置される場合を含む。 Note that the reinforcing member is disposed inside the through-hole in addition to the case where at least a part of the reinforcing member is in close contact with the inner peripheral surface of the through-hole without any gap, It includes a case where a gap exists between the peripheral surface and at least a part of the reinforcing member is disposed inside the through hole via the gap.
　また、強化繊維が貫通孔の軸線方向に沿って配向されるとは、強化繊維が貫通孔の軸線と平行に配向される場合に加え、強化繊維の配向方向（繊維軸の方向）が貫通孔の軸線（応力軸）に対して少しずれている場合を含む。繊維軸と応力軸とのなす角度が０°である場合、強化繊維を含む繊維強化複合材の圧縮弾性率は最大になる。繊維軸と応力軸とのなす角度が小さければ、繊維強化複合材の圧縮弾性率は最大に近い。例えば、繊維軸と応力軸とのなす角度が０°の場合における繊維強化複合材の圧縮弾性率を１００％としたとき、繊維軸と応力軸とのなす角度が１０°の場合における繊維強化複合材の圧縮弾性率は８０％である。そのため、好ましくは強化繊維の配向方向と貫通孔の軸線とのなす角度は１０°以内である。 In addition to the case where the reinforcing fibers are oriented along the axial direction of the through holes, the reinforcing fibers are oriented in parallel to the axial lines of the through holes, and the orientation direction of the reinforcing fibers (the direction of the fiber axis) is the through holes. This includes the case where it is slightly shifted from the axis (stress axis). When the angle formed by the fiber axis and the stress axis is 0 °, the compression elastic modulus of the fiber-reinforced composite material including the reinforcing fibers is maximized. If the angle formed by the fiber axis and the stress axis is small, the compression elastic modulus of the fiber-reinforced composite material is close to the maximum. For example, when the compression elastic modulus of the fiber reinforced composite material when the angle between the fiber axis and the stress axis is 0 ° is 100%, the fiber reinforced composite when the angle between the fiber axis and the stress axis is 10 °. The compression modulus of the material is 80%. Therefore, the angle formed by the orientation direction of the reinforcing fibers and the axis of the through hole is preferably within 10 °.
　また、束状の強化繊維が組紐状あるいは織物状等に形成される際に、束状の強化繊維同士が接触される箇所に強化繊維に曲がる、折れる等の変形が生じる場合がある。このような場合において、強化繊維が貫通孔の軸方向に沿って配向されるとは、強化繊維の長手方向（繊維軸の方向）が貫通孔の軸線と平行に配向される場合に加え、強化繊維の長手方向が貫通孔の軸線に対して少しずれた方向を向いている場合を含む。好ましくは強化繊維の長手方向と貫通孔の軸とのなす角度は１０°以内である。 In addition, when the bundle-like reinforcing fibers are formed in a braided shape or a woven shape, deformation such as bending or breaking of the reinforcing fibers may occur at a place where the bundle-like reinforcing fibers are in contact with each other. In such a case, the reinforcing fiber is oriented along the axial direction of the through-hole in addition to the case where the longitudinal direction of the reinforcing fiber (the direction of the fiber axis) is oriented parallel to the axis of the through-hole. This includes the case where the longitudinal direction of the fiber is in a direction slightly shifted from the axis of the through hole. Preferably, the angle formed by the longitudinal direction of the reinforcing fiber and the axis of the through hole is within 10 °.
　なお、強化繊維の少なくとも一部が、貫通孔の軸線方向に沿って配向されかつ少なくとも貫通孔の一方の開口部から他方の開口部に亘って配置されるとは、強化繊維が貫通孔の軸線方向に沿って配向され、かつ隙間なく配置されることを指す。したがって、貫通孔の軸線方向の長さより短い強化繊維が貫通孔の軸線方向に沿って配置されており、貫通孔の両開口部の間に強化繊維が配置されない領域（隙間）が生じる場合を除く。 Note that at least a part of the reinforcing fiber is oriented along the axial direction of the through hole and is disposed from at least one opening to the other opening of the through hole. It is oriented along the direction and is arranged without a gap. Therefore, a case where a reinforcing fiber shorter than the length of the through hole in the axial direction is arranged along the axial direction of the through hole and a region (gap) where the reinforcing fiber is not arranged between both openings of the through hole is excluded. .
　本発明のさらなる態様では、補強部材が配置された被締結部材を、締結部材を用いて他の部材に締結するための締結構造が提供される。前記被締結部材は、前記締結部材が挿入可能な貫通孔を有する樹脂成形体である。前記補強部材は、マトリックスとしての樹脂と強化繊維とを含む繊維強化複合材である。前記補強部材は前記貫通孔の内部に配置される。前記強化繊維の少なくとも一部は、前記貫通孔の軸線方向に沿って配向されかつ少なくとも前記貫通孔の一方の開口部から他方の開口部に亘って配置される。 In a further aspect of the present invention, there is provided a fastening structure for fastening a fastened member on which a reinforcing member is arranged to another member using the fastening member. The member to be fastened is a resin molded body having a through hole into which the fastening member can be inserted. The reinforcing member is a fiber reinforced composite material including a resin as a matrix and reinforcing fibers. The reinforcing member is disposed inside the through hole. At least a part of the reinforcing fiber is oriented along the axial direction of the through hole and is disposed at least from one opening to the other opening of the through hole.
本発明の第１の実施形態に係る芯糸及び組糸を説明する模式図。The schematic diagram explaining the core yarn and braiding which concern on the 1st Embodiment of this invention. （ａ）は図１の補強部材を説明する模式図、（ｂ）は図１の補強部材の端面形状を説明する模式図。(A) is a schematic diagram explaining the reinforcement member of FIG. 1, (b) is a schematic diagram explaining the end surface shape of the reinforcement member of FIG. 本発明の第１の実施形態に係る被締結部材の締結構造を説明する断面模式図。The cross-sectional schematic diagram explaining the fastening structure of the to-be-fastened member which concerns on the 1st Embodiment of this invention. 本発明の第２の実施形態に係る補強部材を説明する模式図。The schematic diagram explaining the reinforcement member which concerns on the 2nd Embodiment of this invention. 本発明の第２の実施形態に係る被締結部材の締結構造を示す断面模式図。The cross-sectional schematic diagram which shows the fastening structure of the to-be-fastened member which concerns on the 2nd Embodiment of this invention.
　（第１の実施形態）
　第１の実施形態を図１～図３に基づいて説明する。なお、図示の都合上、一部の寸法を誇張して分かり易くしてある。このことは、他の実施形態でも同じである。 (First embodiment)
A first embodiment will be described with reference to FIGS. For convenience of illustration, some dimensions are exaggerated for easy understanding. This is the same in other embodiments.
　図１に示すように、補強部材１は、マトリックスとしての熱硬化性樹脂と強化繊維としての炭素繊維とを含む繊維強化複合材である。補強部材１において複数の芯糸２の各々及び複数の組糸３の各々は炭素繊維の束よりなる。真っ直ぐに配向された芯糸２に対して、互いに異なる方向に配向された組糸３が、交互にかつ斜めに交わされることにより、組紐状組織が形成される。 As shown in FIG. 1, the reinforcing member 1 is a fiber-reinforced composite material including a thermosetting resin as a matrix and carbon fibers as reinforcing fibers. In the reinforcing member 1, each of the plurality of core yarns 2 and each of the plurality of braids 3 is made of a bundle of carbon fibers. A braided structure is formed by alternately and diagonally crossing the braids 3 oriented in different directions with respect to the core yarn 2 oriented straight.
　図２（ａ）に示すように、補強部材１は、後述する図３に示す締結用の貫通孔４に固定可能な円筒状に形成された円筒部５と、円筒部５の上端から貫通孔４の径方向外側に延びる第１フランジ部６と、円筒部５の下端から貫通孔４の径方向外側に延びる第２フランジ部７と、を含む。第１フランジ部６及び第２フランジ部７は円環状である。円筒部５、第１フランジ部６及び第２フランジ部７は上記した組紐状組織によって形成される。円筒部５において、芯糸２は円筒部５の軸線方向に沿って、円筒部５の一方の端面から他方の端面に亘って延びている。 As shown in FIG. 2A, the reinforcing member 1 includes a cylindrical portion 5 formed in a cylindrical shape that can be fixed to a fastening through-hole 4 shown in FIG. 3 to be described later, and a through-hole from the upper end of the cylindrical portion 5. 4 includes a first flange portion 6 extending outward in the radial direction, and a second flange portion 7 extending outward in the radial direction of the through hole 4 from the lower end of the cylindrical portion 5. The first flange portion 6 and the second flange portion 7 are annular. The cylindrical portion 5, the first flange portion 6 and the second flange portion 7 are formed by the braided tissue described above. In the cylindrical portion 5, the core yarn 2 extends from one end surface of the cylindrical portion 5 to the other end surface along the axial direction of the cylindrical portion 5.
　図２（ｂ）は図２（ａ）における補強部材１の上端（第１フランジ部６）の端面である。図２（ｂ）に示すように、第１フランジ部６はその中心部に、後述する締結部材としてのボルト８を挿入可能な径を有する円形孔９を備える。円形孔９の内径は、補強部材１の円筒部５の内径に一致している。第１フランジ部６は、ボルト８の頭部８ａの外形よりも大きい外径を有する。なお、第２フランジ部７も第１フランジ部６と同様の形状及び大きさを有する。 2 (b) is an end face of the upper end (first flange portion 6) of the reinforcing member 1 in FIG. 2 (a). As shown in FIG. 2B, the first flange portion 6 includes a circular hole 9 having a diameter into which a bolt 8 as a fastening member described later can be inserted at the center thereof. The inner diameter of the circular hole 9 coincides with the inner diameter of the cylindrical portion 5 of the reinforcing member 1. The first flange portion 6 has an outer diameter larger than the outer shape of the head 8 a of the bolt 8. The second flange portion 7 also has the same shape and size as the first flange portion 6.
　次に、補強部材１が配置される被締結部材１０を説明する。図３に示すように、被締結部材１０は、マトリックスとしての熱硬化性樹脂と、束状の強化繊維としての炭素繊維束１１とを含み、板状に形成されている。炭素繊維束１１は、互いに直交するＸ，Ｙ，Ｚ軸方向に沿って配向され、三次元構造の繊維組織をなす。被締結部材１０にはボルト８が挿入される貫通孔４が形成されている。貫通孔４の断面はボルト８が挿入可能な径を有する円形に形成されている。貫通孔４の内周面（貫通孔４の内部の周面）には補強部材１の円筒部５が隙間なく固定されている。また、第１フランジ部６は、被締結部材１０の上面と当接して配置されている。第２フランジ部７は、被締結部材１０の底面（下面）と当接して配置されている。 Next, the fastened member 10 on which the reinforcing member 1 is disposed will be described. As shown in FIG. 3, the fastened member 10 includes a thermosetting resin as a matrix and a carbon fiber bundle 11 as a bundle-like reinforcing fiber, and is formed in a plate shape. The carbon fiber bundle 11 is oriented along the X, Y, and Z axis directions orthogonal to each other, and forms a three-dimensional fiber structure. A through hole 4 into which the bolt 8 is inserted is formed in the fastened member 10. The cross section of the through hole 4 is formed in a circular shape having a diameter into which the bolt 8 can be inserted. The cylindrical portion 5 of the reinforcing member 1 is fixed to the inner peripheral surface of the through hole 4 (the peripheral surface inside the through hole 4) without a gap. Further, the first flange portion 6 is disposed in contact with the upper surface of the fastened member 10. The second flange portion 7 is disposed in contact with the bottom surface (lower surface) of the fastened member 10.
　図３に従って被締結部材１０の締結構造を説明する。被締結部材１０は次のように他の部材としての金属材１２と締結されている。金属材１２は締結用の貫通孔１３を有している。被締結部材１０の下面と金属材１２の上面とは対向しており、貫通孔４の軸線４ａと、貫通孔１３の軸線１３ａとが一致している。ボルト８は貫通孔４に挿入され、頭部８ａの座面が第１フランジ部６からはみ出さずに配置されている。貫通孔４の内周面のボルト８と対向する領域に、補強部材１の円筒部５が配置されている。 The fastening structure of the fastened member 10 will be described with reference to FIG. The fastened member 10 is fastened with a metal material 12 as another member as follows. The metal material 12 has a through hole 13 for fastening. The lower surface of the fastened member 10 and the upper surface of the metal material 12 face each other, and the axis 4a of the through hole 4 and the axis 13a of the through hole 13 coincide. The bolt 8 is inserted into the through-hole 4, and the seat surface of the head 8 a is disposed without protruding from the first flange portion 6. The cylindrical portion 5 of the reinforcing member 1 is disposed in a region facing the bolt 8 on the inner peripheral surface of the through hole 4.
　円筒部５において、芯糸２は貫通孔４の軸線４ａ方向に沿って配向されている。円筒部５は、被締結部材１０の板厚よりも長い長さを有している。芯糸２は貫通孔４の一方の開口部から他方の開口部に亘って延びている。第２フランジ部７は被締結部材１０と金属材１２とによって挟まれている。ボルト８の先端は貫通孔１３を通って金属材１２の下方に突出しており、ナット１４により締め付けられている。 In the cylindrical portion 5, the core yarn 2 is oriented along the direction of the axis 4 a of the through hole 4. The cylindrical part 5 has a length longer than the plate thickness of the fastened member 10. The core yarn 2 extends from one opening of the through hole 4 to the other opening. The second flange portion 7 is sandwiched between the fastened member 10 and the metal material 12. The tip of the bolt 8 protrudes below the metal material 12 through the through hole 13 and is tightened by a nut 14.
　次に、補強部材１及び被締結部材１０の製造方法を説明する。炭素繊維束１１と平板状の支持体（図示せず）とを準備する。支持体の所定の位置に、ボルト８の軸部が挿入可能な径を有するパイプを、支持体の平面に対して垂直な方向（Ｚ軸方向）に延びるように配置する。また、支持体に、所定のピッチでピンを支持体の平面に対し垂直な方向（Ｚ軸方向）に延びるように配置する。パイプが設けられた領域を除いて、ピンに直交するＸ，Ｙ軸方向に沿って炭素繊維束１１をＵ字状に折り返しながら配列し、炭素繊維束１１が層状に形成された強化繊維層を形成する。 Next, a method for manufacturing the reinforcing member 1 and the fastened member 10 will be described. A carbon fiber bundle 11 and a flat support (not shown) are prepared. A pipe having a diameter into which the shaft portion of the bolt 8 can be inserted is arranged at a predetermined position of the support so as to extend in a direction perpendicular to the plane of the support (Z-axis direction). Further, pins are arranged on the support so as to extend in a direction (Z-axis direction) perpendicular to the plane of the support at a predetermined pitch. A reinforced fiber layer in which the carbon fiber bundles 11 are formed in a layer shape by arranging the carbon fiber bundles 11 in a U-shaped manner along the X and Y axis directions orthogonal to the pins except for the region where the pipe is provided. Form.
　次に、強化繊維層をＺ軸方向に積層して、炭素繊維束１１がＸ，Ｙの２軸に沿って配向された積層糸群を形成する。支持体からピンを取り除き、同ピンを、積層糸群をなす炭素繊維束１１と直交する方向（Ｚ軸方向）に沿って配向される厚さ方向糸（垂直糸）と置換する。積層糸群を厚さ方向糸によって結合する。支持体からパイプを取り除き、互いに直交するＸ，Ｙ及びＺ軸方向にそれぞれ延びる炭素繊維束１１を含む三次元繊維組織を形成する。なお、三次元繊維組織とは被締結部材１０において樹脂が含浸される前の三次元構造の炭素繊維束１１である。三次元繊維組織のパイプが取り除かれた領域に、貫通孔４が形成される。 Next, the reinforcing fiber layer is laminated in the Z-axis direction to form a laminated yarn group in which the carbon fiber bundles 11 are oriented along the X and Y axes. The pin is removed from the support, and the pin is replaced with a thickness direction yarn (vertical yarn) oriented along a direction (Z-axis direction) orthogonal to the carbon fiber bundle 11 forming the laminated yarn group. The laminated yarn group is bonded by a thickness direction yarn. The pipe is removed from the support to form a three-dimensional fiber structure including carbon fiber bundles 11 extending in the X, Y, and Z axis directions orthogonal to each other. The three-dimensional fiber structure is a carbon fiber bundle 11 having a three-dimensional structure before the resin is impregnated in the fastened member 10. A through hole 4 is formed in the region where the pipe of the three-dimensional fiber structure is removed.
　次に芯糸２及び組糸３を準備する。ボルト８の軸部を挿入可能な孔径に相当する外径を有する円柱の芯材を用意する。組紐状組織を形成する装置である三次元ブレーダー（ロータ・キャリア方式三次元織物織機）の中心（形成する組紐状組織の軸心）に芯材を配置した状態で、芯材の外周部に組紐状組織を形成する。なお、組紐状組織とは補強部材１において樹脂が含浸される前の芯糸２及び組糸３を含む集合体である。芯材の軸方向（Ｚ軸方向）に沿って延びるように芯糸２を配列し、Ａ軸及びＢ軸の二つの軸方向に沿って延びるように組糸３を配列する。ここでＡ，Ｂ軸は芯糸２の延びる方向（Ｚ軸方向）に対して斜めでかつ、互いに交わる方向に延びる軸である。 Next, core yarn 2 and braid 3 are prepared. A cylindrical core member having an outer diameter corresponding to the hole diameter into which the shaft portion of the bolt 8 can be inserted is prepared. The braid is placed on the outer periphery of the core material with the core material placed at the center (axis of the braid-like tissue to be formed) of the three-dimensional braider (rotor carrier type three-dimensional woven loom) that is a device for forming the braided tissue. To form a texture. The braided structure is an aggregate including the core yarn 2 and the braid 3 before the reinforcing member 1 is impregnated with resin. The core yarn 2 is arranged so as to extend along the axial direction (Z-axis direction) of the core material, and the braid 3 is arranged so as to extend along two axial directions of the A axis and the B axis. Here, the A and B axes are axes that are inclined with respect to the direction in which the core yarn 2 extends (Z-axis direction) and that extend in directions intersecting each other.
　三次元ブレーダーにより、芯糸２をＺ軸方向に延びるように保持しつつ芯糸２と組糸３とを組み合せて組紐状組織を形成する。組紐状組織はＺ軸方向の長さが貫通孔４の高さに対応した長さとなるように形成される。組紐状組織の外周が貫通孔４の内周に対応する形状及び大きさを有するように組紐状組織を形成する。組紐状組織から芯材を取り除き、円筒状の組紐状組織である組紐円筒部を得る。なお、組紐円筒部は補強部材１における円筒部５に対応しており、樹脂が含浸される前の組紐状に形成された炭素繊維である。 A braided structure is formed by combining the core yarn 2 and the braid 3 while holding the core yarn 2 so as to extend in the Z-axis direction by a three-dimensional blader. The braided tissue is formed so that the length in the Z-axis direction corresponds to the height of the through hole 4. The braided tissue is formed so that the outer periphery of the braided tissue has a shape and size corresponding to the inner periphery of the through hole 4. The core material is removed from the braided tissue to obtain a braided cylindrical portion which is a cylindrical braided tissue. The braided cylindrical portion corresponds to the cylindrical portion 5 in the reinforcing member 1 and is a carbon fiber formed in a braided shape before being impregnated with resin.
　組紐円筒部の上端及び下端に、円環状の組紐状組織である組紐フランジ部を組紐円筒部と連続して形成する。なお、組紐フランジ部とは補強部材１における第１フランジ部６及び第２フランジ部７に対応しており、樹脂が含浸される前の組紐状に形成された炭素繊維である。組紐フランジ部は、組紐円筒部の上端及び下端から連続した芯糸２及び組糸３を組み合せて、組紐円筒部と連続して形成される。 A braided flange portion, which is an annular braided structure, is formed continuously with the braided cylindrical portion at the upper and lower ends of the braided cylindrical portion. The braid flange portion corresponds to the first flange portion 6 and the second flange portion 7 in the reinforcing member 1 and is a carbon fiber formed in a braid shape before being impregnated with resin. The braided flange portion is formed continuously with the braided cylindrical portion by combining the core yarn 2 and the braided yarn 3 continuous from the upper end and the lower end of the braided cylindrical portion.
　三次元繊維組織の貫通孔４に組紐状組織を挿入し、組紐状組織の端部を三次元繊維組織の貫通孔４から突出させて配置する。挿入の際に、組紐フランジ部は貫通孔４を通過可能に折り曲げられている。挿入により組紐円筒部が貫通孔４の内周面に対応して配置され、組紐フランジ部が三次元繊維組織における貫通孔４の上端及び下端に配置される。組紐フランジ部は貫通孔４の上端及び下端において、元の形状（円環状）に広げられる。組紐フランジ部は全ての領域で三次元繊維組織と接して配置される。 The braided tissue is inserted into the through-hole 4 of the three-dimensional fiber structure, and the end of the braided tissue is protruded from the through-hole 4 of the three-dimensional fiber structure. At the time of insertion, the braided flange portion is bent so as to pass through the through hole 4. By insertion, the braided cylindrical portion is arranged corresponding to the inner peripheral surface of the through-hole 4, and the braided flange portion is arranged at the upper and lower ends of the through-hole 4 in the three-dimensional fiber structure. The braided flange portion is expanded to the original shape (annular shape) at the upper end and the lower end of the through hole 4. The braid flange portion is arranged in contact with the three-dimensional fiber structure in all regions.
　三次元繊維組織に固定された組紐状組織は成形型を用いて成形体に成形される。成形型は上型と下型からなり、型締め状態において型内を減圧する減圧通路と、型内に樹脂を注入する樹脂注入通路とを備えている。下型には組紐状組織の組紐円筒部の内径に対応する断面形状を有する円柱状の凸部が形成されている。上型が開かれた状態で、組紐円筒部が凸部を囲繞しかつ凸部と接するように、組紐状組織を下型に配置する。次に上型を閉じて型内を真空に近い状態まで減圧した状態で、熱硬化性樹脂を型内に注入して、三次元繊維組織及び組紐状組織に含浸させる。 The braided structure fixed to the three-dimensional fiber structure is formed into a formed body using a forming die. The molding die includes an upper die and a lower die, and includes a pressure reducing passage for decompressing the inside of the die and a resin injection passage for injecting resin into the die. A columnar convex portion having a cross-sectional shape corresponding to the inner diameter of the braided cylindrical portion of the braided tissue is formed on the lower mold. In a state where the upper mold is opened, the braided tissue is disposed on the lower mold so that the braided cylindrical portion surrounds the convex portion and is in contact with the convex portion. Next, in a state where the upper die is closed and the inside of the die is depressurized to a state close to vacuum, a thermosetting resin is injected into the die to impregnate the three-dimensional fiber structure and braided structure.
　次に成形型を図示しない加熱手段によって加熱し、三次元繊維組織及び組紐状組織を樹脂の熱硬化温度以上に加熱し、含浸した樹脂を硬化させる。成形型の温度が低下した後に成形型を開き、樹脂が硬化した成形体を下型から取り出す。なお、成形体は三次元繊維組織及び組紐状組織並びに樹脂を含む繊維強化複合材である。すなわち、成形体は一体に形成された被締結部材１０及び補強部材１を含む。 Next, the mold is heated by a heating means (not shown), and the three-dimensional fiber structure and braided structure are heated to a temperature equal to or higher than the thermosetting temperature of the resin to cure the impregnated resin. After the temperature of the mold is lowered, the mold is opened, and the molded body in which the resin is cured is taken out from the lower mold. The molded body is a fiber-reinforced composite material including a three-dimensional fiber structure, a braided structure, and a resin. That is, the molded body includes the fastened member 10 and the reinforcing member 1 that are integrally formed.
　第１の実施形態における補強部材１及び被締結部材１０の作用を説明する。被締結部材１０の貫通孔４の内周面に補強部材１が固定されている。補強部材１において、芯糸２が貫通孔４の軸線４ａ方向（被締結部材１０の板厚方向）に沿って配向され、かつ少なくとも貫通孔４の一方の開口部から他方の開口部に亘って連続して延びている。芯糸２はボルト８の頭部８ａ及び金属材１２と当接している。芯糸２の配向方向は被締結部材１０に作用する応力の方向と同じである。すなわち繊維軸と応力軸のなす角度は０°である。被締結部材１０の貫通孔４にボルト８が挿入されて、被締結部材１０が金属材１２と締結された場合、ボルト８の締結による軸力は貫通孔４の内周面において、芯糸２に分担される。被締結部材１０の熱硬化性樹脂の圧縮弾性率に比べ、芯糸２が貫通孔４の軸線４ａと同じ方向に配向された（繊維軸と応力軸とがなす角度が０°）補強部材１の圧縮弾性率は４０倍程度大きい。そのため、ボルト８の締結力による被締結部材１０の樹脂のクリープが抑制され、被締結部材１０の変形を防ぐことができる。 The operation of the reinforcing member 1 and the fastened member 10 in the first embodiment will be described. The reinforcing member 1 is fixed to the inner peripheral surface of the through hole 4 of the fastened member 10. In the reinforcing member 1, the core yarn 2 is oriented along the direction of the axis 4 a of the through hole 4 (plate thickness direction of the member to be fastened 10), and extends at least from one opening to the other opening of the through hole 4. It extends continuously. The core yarn 2 is in contact with the head 8 a of the bolt 8 and the metal material 12. The orientation direction of the core yarn 2 is the same as the direction of the stress acting on the fastened member 10. That is, the angle formed by the fiber axis and the stress axis is 0 °. When the bolt 8 is inserted into the through hole 4 of the fastened member 10 and the fastened member 10 is fastened to the metal material 12, the axial force due to the fastening of the bolt 8 is the core yarn 2 on the inner peripheral surface of the through hole 4. To be shared. Reinforcing member 1 in which the core yarn 2 is oriented in the same direction as the axis 4a of the through-hole 4 (the angle between the fiber axis and the stress axis is 0 °) compared to the compression modulus of the thermosetting resin of the fastened member 10 The compression elastic modulus is about 40 times larger. Therefore, resin creep of the fastened member 10 due to the fastening force of the bolt 8 is suppressed, and deformation of the fastened member 10 can be prevented.
　被締結部材１０において、ボルト８の頭部８ａの軸線４ａに沿った延長領域は、頭部８ａから受ける締結力に起因する応力によってクリープを生じ易い応力作用領域である。被締結部材１０の板厚が十分薄い場合、前記応力作用領域においてボルト８の頭部８ａに最も近い部位に作用する応力とそこから離れた部位に作用する応力とは同等である。そのため、少なくとも貫通孔４の内部の芯糸２が貫通孔４の軸線４ａ方向に沿って配向されかつ一方の開口部から他方の開口部に亘って配置されていれば、軸線４ａ方向に沿って配向された芯糸２がボルト８の頭部８ａと当接する第１フランジ部６に無くとも、前記応力作用領域にかかるボルト８の締結力を貫通孔４の内部の芯糸２によって十分に受け止めることができる。 In the member 10 to be fastened, the extension region along the axis 4a of the head 8a of the bolt 8 is a stress acting region in which creep is likely to occur due to the stress caused by the fastening force received from the head 8a. When the plate thickness of the fastened member 10 is sufficiently thin, the stress acting on the portion closest to the head 8a of the bolt 8 in the stress acting region is equal to the stress acting on the portion away from the portion. Therefore, if at least the core yarn 2 inside the through-hole 4 is oriented along the direction of the axis 4a of the through-hole 4 and arranged from one opening to the other opening, along the direction of the axis 4a. Even if the oriented core yarn 2 is not in the first flange portion 6 that contacts the head 8 a of the bolt 8, the fastening force of the bolt 8 applied to the stress acting region is sufficiently received by the core yarn 2 inside the through hole 4. be able to.
　被締結部材１０は樹脂に加え、炭素繊維束１１を含有する。被締結部材１０は炭素繊維束１１を含有しない場合に比べてクリープの原因である樹脂の量が少ない。そのため、補強部材１が締結される被締結部材として炭素繊維束１１を含有する被締結部材１０を用いることで、クリープを抑制する効果を高められる。 The fastened member 10 contains a carbon fiber bundle 11 in addition to the resin. The member 10 to be fastened has a smaller amount of resin that causes creep than the case where the carbon fiber bundle 11 is not contained. Therefore, the effect of suppressing creep can be enhanced by using the fastened member 10 containing the carbon fiber bundle 11 as the fastened member to which the reinforcing member 1 is fastened.
　貫通孔４の内周面に補強部材１を隙間なく密着させるためには、円筒部５の外周を円形に形成する必要がある。反物状の織物である炭素繊維を筒状に形成する場合、織物の端部を縫い合わせて接合する必要があり、接合された箇所に継ぎ目が生じる。これに対し、炭素繊維である芯糸２及び組糸３からなる組紐状組織により炭素繊維を筒状に形成する場合では、接合すべき端部自体が存在しないため、補強部材１を継ぎ目のない円筒状に形成することができる。従って、補強部材１を貫通孔４の内周面に隙間なく密着させることが可能となる。 In order to closely attach the reinforcing member 1 to the inner peripheral surface of the through hole 4 without a gap, it is necessary to form the outer periphery of the cylindrical portion 5 in a circular shape. When the carbon fiber which is a fabric-like woven fabric is formed into a cylindrical shape, it is necessary to sew and join the ends of the woven fabric, and a seam is generated at the joined portion. On the other hand, in the case where the carbon fiber is formed in a cylindrical shape by the braided structure composed of the core yarn 2 and the braid 3 that are carbon fibers, the reinforcing member 1 is seamless since there is no end portion to be joined. It can be formed in a cylindrical shape. Therefore, the reinforcing member 1 can be closely attached to the inner peripheral surface of the through hole 4 without a gap.
　また、組紐状組織により補強部材１を形成することで、円筒部５と第１フランジ部６、及び円筒部５と第２フランジ部７とを連続して形成することができる。
　クリープ抑制効果を高めるには、貫通孔４の内部を含む領域において、少なくとも一部の炭素繊維が貫通孔４の軸線４ａ方向に沿って配向される必要がある。そのため、炭素繊維の向きが安定するように該炭素繊維を配置できることが望ましい。炭素繊維である芯糸２及び組糸３を組み上げて組紐状組織が形成される場合では、芯糸２は芯糸２に対して斜めに配向された組糸３により固定されるので、芯糸２の位置及び方向を安定させることができる。従って、補強部材１において芯糸２を貫通孔４の軸線４ａ方向に沿って安定して配置することができ、被締結部材１０のクリープ抑制効果を高めることができる。 Moreover, the cylindrical part 5 and the 1st flange part 6 and the cylindrical part 5 and the 2nd flange part 7 can be formed continuously by forming the reinforcement member 1 with a braided structure | tissue.
In order to enhance the creep suppressing effect, at least a part of the carbon fibers needs to be oriented along the direction of the axis 4 a of the through hole 4 in the region including the inside of the through hole 4. Therefore, it is desirable that the carbon fiber can be arranged so that the orientation of the carbon fiber is stable. In the case where a braided structure is formed by assembling the core yarn 2 and the braid 3 that are carbon fibers, the core yarn 2 is fixed by the braid 3 that is obliquely oriented with respect to the core yarn 2. The position and direction of 2 can be stabilized. Therefore, the core yarn 2 can be stably arranged in the reinforcing member 1 along the direction of the axis 4a of the through hole 4, and the creep suppressing effect of the fastened member 10 can be enhanced.
　強化繊維の向きが互いに異なる繊維強化複合材同士を接合した場合や、樹脂と繊維強化複合材とを接合した場合には、接合部である界面において層間剥離が生じ易い。被締結部材１０の貫通孔４の内周面に補強部材１の円筒部５が固定された場合、被締結部材１０と補強部材１との界面に応力が集中してかかると、該界面に亀裂が生じる恐れがある。この点、補強部材１は第１フランジ部６及び第２フランジ部７を有するため、被締結部材１０と補強部材１との界面は第１フランジ部６及び第２フランジ部７によって覆われる。従って、ボルト８の頭部８ａからの力は界面に直接かからず第１フランジ部６及び第２フランジ部７により分散される。そのため、補強部材１と被締結部材１０との界面に割れや亀裂が生じることを防止することができる。 When fiber reinforced composite materials having different reinforcing fiber directions are joined together, or when a resin and a fiber reinforced composite material are joined together, delamination is likely to occur at the interface that is the joint. When the cylindrical portion 5 of the reinforcing member 1 is fixed to the inner peripheral surface of the through-hole 4 of the fastened member 10, if stress concentrates on the interface between the fastened member 10 and the reinforcing member 1, the interface cracks. May occur. In this respect, since the reinforcing member 1 has the first flange portion 6 and the second flange portion 7, the interface between the fastened member 10 and the reinforcing member 1 is covered by the first flange portion 6 and the second flange portion 7. Accordingly, the force from the head 8 a of the bolt 8 is not applied directly to the interface but is distributed by the first flange portion 6 and the second flange portion 7. Therefore, it is possible to prevent a crack or a crack from occurring at the interface between the reinforcing member 1 and the fastened member 10.
　貫通孔４の内周面に補強部材１が固定されており、貫通孔４に挿入されたボルト８により被締結部材１０が金属材１２と締結されている。貫通孔４の内周面に補強部材１が固定されているため、被締結部材１０と金属材１２とをボルト８により締結する場合において、ボルト８の緩みを抑制することができる。 The reinforcing member 1 is fixed to the inner peripheral surface of the through hole 4, and the fastened member 10 is fastened to the metal material 12 by a bolt 8 inserted into the through hole 4. Since the reinforcing member 1 is fixed to the inner peripheral surface of the through hole 4, loosening of the bolt 8 can be suppressed when the fastened member 10 and the metal material 12 are fastened by the bolt 8.
　円筒部５の上端及び下端に第１フランジ部６及び第２フランジ部７が設けられる場合、成形後の補強部材１を被締結部材１０の貫通孔４に嵌め込むことができない。これに対し、第１の実施形態では三次元繊維組織に組紐状組織が組み合された後に樹脂を含浸することで補強部材１と被締結部材１０とを一体形成する。そのため、第１フランジ部６及び第２フランジ部７が設けられた補強部材１を被締結部材１０の貫通孔４に固定することができる。さらに、補強部材１を貫通孔４に圧入する必要がないため、貫通孔４の加工精度や補強部材１の圧入精度を高めなくてもよく、加工が容易になる。 When the 1st flange part 6 and the 2nd flange part 7 are provided in the upper end and lower end of the cylindrical part 5, the reinforcement member 1 after shaping | molding cannot be fitted in the through-hole 4 of the to-be-fastened member 10. FIG. On the other hand, in the first embodiment, the reinforcing member 1 and the fastened member 10 are integrally formed by impregnating the resin after the braided structure is combined with the three-dimensional fiber structure. Therefore, the reinforcing member 1 provided with the first flange portion 6 and the second flange portion 7 can be fixed to the through hole 4 of the fastened member 10. Furthermore, since it is not necessary to press-fit the reinforcing member 1 into the through-hole 4, it is not necessary to increase the processing accuracy of the through-hole 4 and the press-fitting accuracy of the reinforcing member 1, and the processing becomes easy.
　補強部材１は樹脂と炭素繊維とを含み、金属製の部材ではない。そのため、特許文献１のように金属パイプを被締結部材に取り付ける場合に生じる、締結構造における重量の増加を防ぐことができる。また、被締結部材に金属製の別部材を一体化する場合には、精度の高い成形技術が必要となるのに対し、被締結部材に非金属製の補強部材１を一体化することは高精度な成形技術を必要とすることなく容易に実施できる。また、非金属製の補強部材１が固定された被締結部材１０においては、被締結部材を廃棄する際に被締結部材から金属製の別部材を分離するといった必要を生じないため、リサイクル時にかかるコストを低減できる。 Reinforcing member 1 includes resin and carbon fiber and is not a metal member. Therefore, the increase in the weight in a fastening structure which arises when attaching a metal pipe to a to-be-fastened member like patent document 1 can be prevented. In addition, when a separate metal member is integrated with the member to be fastened, a highly precise molding technique is required, whereas it is difficult to integrate the nonmetallic reinforcing member 1 with the member to be fastened. It can be easily carried out without requiring an accurate molding technique. Further, in the fastened member 10 to which the non-metallic reinforcing member 1 is fixed, it is not necessary to separate another metal member from the fastened member when the fastened member is discarded. Cost can be reduced.
　被締結部材１０は、円筒部５に対応した断面形状の円柱である凸部を有する成形型により成形される。成形型に樹脂を注入した場合、成形型の凸部には樹脂が回らないため、被締結部材１０の凸部に対応する領域には成形の段階で締結用の貫通孔４が形成される。そのため、成形後の被締結部材１０に締結用の貫通孔４を例えば工具を使用して形成するといった必要がなく、よって工具が痛むといった事態も生じない。 The fastened member 10 is molded by a molding die having a convex portion which is a column having a cross-sectional shape corresponding to the cylindrical portion 5. When the resin is injected into the mold, the resin does not rotate around the convex portion of the mold, and therefore, a through-hole 4 for fastening is formed in the region corresponding to the convex portion of the fastened member 10 at the stage of molding. Therefore, it is not necessary to form the fastening through hole 4 in the molded member to be fastened 10 using, for example, a tool, and thus the tool is not damaged.
　前記した第１の実施形態は以下の利点を有する。
　（１）貫通孔４を有し熱硬化性樹脂よりも圧縮弾性率が大きい補強部材１は被締結部材１０の貫通孔４の内周面に固定される。貫通孔４の内周面において芯糸２は貫通孔４の軸線４ａ方向に沿って配向されかつ少なくとも貫通孔４の一方の開口部から他方の開口部に亘って連続して配置されている。貫通孔４の軸線４ａ方向に沿って芯糸２が配向された場合における補強部材１の圧縮弾性率は熱硬化性樹脂の圧縮弾性率よりも大きいため、貫通孔４にボルト８が挿入されて被締結部材１０が金属材１２と締結された場合において、ボルト８の締結力による被締結部材１０のクリープ変形を抑制することができる。 The first embodiment described above has the following advantages.
(1) The reinforcing member 1 having the through hole 4 and having a higher compression elastic modulus than the thermosetting resin is fixed to the inner peripheral surface of the through hole 4 of the member to be fastened 10. On the inner peripheral surface of the through hole 4, the core yarn 2 is oriented along the direction of the axis 4 a of the through hole 4 and is continuously disposed from at least one opening of the through hole 4 to the other opening. Since the compression elastic modulus of the reinforcing member 1 when the core yarn 2 is oriented along the direction of the axis 4a of the through hole 4 is larger than the compression elastic modulus of the thermosetting resin, the bolt 8 is inserted into the through hole 4. When the member to be fastened 10 is fastened to the metal material 12, creep deformation of the member to be fastened 10 due to the fastening force of the bolt 8 can be suppressed.
　（２）被締結部材１０は炭素繊維束１１を含有するので、炭素繊維束１１を含有しない被締結部材と比べてクリープの原因である樹脂の量が少ない。そのため、被締結部材１０のクリープ抑制効果を高めることができる。 (2) Since the fastened member 10 contains the carbon fiber bundle 11, the amount of resin that causes creep is smaller than that of the fastened member that does not contain the carbon fiber bundle 11. Therefore, the creep suppressing effect of the fastened member 10 can be enhanced.
　（３）炭素繊維である芯糸２及び組糸３によって組紐状組織が形成されるため、炭素繊維を円筒形状に継ぎ目なく形成でき、補強部材１を貫通孔４の内周面に確実に密着させることができる。 (3) Since the braided structure is formed by the core yarn 2 and the braid 3 which are carbon fibers, the carbon fibers can be seamlessly formed in a cylindrical shape, and the reinforcing member 1 is securely adhered to the inner peripheral surface of the through hole 4 Can be made.
　（４）補強部材１は芯糸２及び組糸３からなる組紐状組織により形成されている。従って、補強部材１において芯糸２を貫通孔４の軸線４ａ方向に沿って延びるように安定して配置することができ、被締結部材１０のクリープ抑制効果を高めることができる。 (4) The reinforcing member 1 is formed of a braided structure composed of the core yarn 2 and the braided yarn 3. Therefore, the core yarn 2 can be stably disposed in the reinforcing member 1 so as to extend along the direction of the axis 4 a of the through hole 4, and the creep suppressing effect of the fastened member 10 can be enhanced.
　（５）被締結部材１０の貫通孔４に補強部材１を介してボルト８が挿入されることで被締結部材１０が金属材１２と締結されている。そのため、被締結部材１０を金属材１２と締結する際のボルト８の緩みを抑制することができる。 (5) The member to be fastened 10 is fastened to the metal member 12 by inserting the bolt 8 into the through hole 4 of the member to be fastened 10 via the reinforcing member 1. Therefore, loosening of the bolt 8 when the fastened member 10 is fastened to the metal material 12 can be suppressed.
　（６）被締結部材１０の貫通孔４に補強部材１を固定するため、貫通孔４に金属製の部材を取り付けた場合に生じる、重量の増加を防ぐことができる。
　（７）貫通孔４に金属材１２のような金属製の別部材を一体化する場合には、精度の高い成形技術が必要となるが、非金属製の補強部材１を用いた締結構造では、金属製の別部材を一体化する場合と比べて成形が容易である。 (6) Since the reinforcing member 1 is fixed to the through hole 4 of the fastened member 10, an increase in weight that occurs when a metal member is attached to the through hole 4 can be prevented.
(7) When a separate metal member such as the metal material 12 is integrated into the through-hole 4, a highly precise forming technique is required. However, in the fastening structure using the non-metallic reinforcing member 1, Compared with the case where a separate metal member is integrated, molding is easier.
　（８）非金属製の補強部材１が固定された被締結部材１０においては、被締結部材１０を廃棄する際に被締結部材１０から補強部材１を分離する必要がないため、リサイクル時にかかるコストを低減できる。 (8) In the fastened member 10 to which the non-metallic reinforcing member 1 is fixed, there is no need to separate the reinforcing member 1 from the fastened member 10 when the fastened member 10 is discarded, and thus the cost required for recycling. Can be reduced.
　（１０）補強部材１は被締結部材１０と一体成形されている。そのため、補強部材１を被締結部材１０に圧入する必要がなく、被締結部材１０に形成される貫通孔４の加工精度や補強部材１の圧入精度を高めなくてもよい。 (10) The reinforcing member 1 is integrally formed with the fastened member 10. Therefore, it is not necessary to press-fit the reinforcing member 1 into the fastened member 10, and the processing accuracy of the through holes 4 formed in the fastened member 10 and the press-fit accuracy of the reinforcing member 1 do not have to be increased.
　（１１）被締結部材１０には成形時において、成形型の下型の凸部にあたる領域に締結用の貫通孔４が形成される。そのため、成形後の被締結部材１０に締結用の貫通孔４を別途形成するという必要がない。 (11) The fastening member 10 has a through-hole 4 for fastening in a region corresponding to the convex portion of the lower mold of the molding die at the time of molding. Therefore, it is not necessary to separately form the through-hole 4 for fastening in the to-be-fastened member 10 after molding.
　（１２）芯糸２及び組糸３は組紐状組織に形成されるため、円筒部５と第１フランジ部６、及び円筒部５と第２フランジ部７とを連続して形成することができる。
　（１３）補強部材１は第１フランジ部６及び第２フランジ部７を有するため、第１フランジ部６及び第２フランジ部７によりボルト８の締結力を分散させることができ、貫通孔４の内周面に配置された補強部材１と被締結部材１０との界面に割れや亀裂が生じることが防止される。 (12) Since the core yarn 2 and the braid 3 are formed in a braided structure, the cylindrical portion 5 and the first flange portion 6 and the cylindrical portion 5 and the second flange portion 7 can be formed continuously. .
(13) Since the reinforcing member 1 has the first flange portion 6 and the second flange portion 7, the fastening force of the bolt 8 can be dispersed by the first flange portion 6 and the second flange portion 7. It is possible to prevent cracks and cracks from occurring at the interface between the reinforcing member 1 and the fastened member 10 disposed on the inner peripheral surface.
　（１４）被締結部材１０と補強部材１とは一体に成形されるため、補強部材１を被締結部材１０の貫通孔４に嵌め込む必要がない。従って、第１フランジ部６及び第２フランジ部７が設けられた補強部材１を被締結部材１０の貫通孔４の内周面に固定することができる。 (14) Since the fastened member 10 and the reinforcing member 1 are formed integrally, it is not necessary to fit the reinforcing member 1 into the through hole 4 of the fastened member 10. Therefore, the reinforcing member 1 provided with the first flange portion 6 and the second flange portion 7 can be fixed to the inner peripheral surface of the through-hole 4 of the fastened member 10.
　（第２の実施形態）
　図４及び図５に示す第２の実施形態は、第１の実施形態における補強部材１の形状及び補強部材１における芯糸２の配向方向を変更したもので、第１の実施形態と同一の構成については同一の符号を付し、詳細な説明を省略する。 (Second Embodiment)
The second embodiment shown in FIGS. 4 and 5 is the same as the first embodiment except that the shape of the reinforcing member 1 in the first embodiment and the orientation direction of the core yarn 2 in the reinforcing member 1 are changed. The same reference numerals are given to the configurations, and detailed description is omitted.
　図４に示すように、補強部材１５は円筒状に形成されている。円筒状の補強部材１５は第１の実施形態における補強部材１の円筒部５に対応する。組糸１７は芯糸１６と同じ太さであり、組糸１７が芯糸１６に対して交互にかつ斜めに交わされることにより組紐状組織が形成されている。芯糸１６は組糸１７と組み合された箇所の一部で図示しない屈曲を生じている。芯糸１６は、その長手方向が円筒の軸線（後述する貫通孔２０の軸線２０ａ）に対して５°傾くように配向されている。なお、芯糸１６の長手方向とは芯糸１６において屈曲した箇所を除き、芯糸１６が配向されている方向を指す。 As shown in FIG. 4, the reinforcing member 15 is formed in a cylindrical shape. The cylindrical reinforcing member 15 corresponds to the cylindrical portion 5 of the reinforcing member 1 in the first embodiment. The braid 17 has the same thickness as the core yarn 16, and a braid-like structure is formed by the braid 17 being alternately and obliquely intersected with the core yarn 16. The core yarn 16 is bent at a portion where it is combined with the braid 17 and is not shown. The core yarn 16 is oriented such that its longitudinal direction is inclined by 5 ° with respect to a cylindrical axis (an axis 20a of a through-hole 20 described later). Note that the longitudinal direction of the core yarn 16 refers to the direction in which the core yarn 16 is oriented except for the bent portion of the core yarn 16.
　被締結部材１８はマトリックスとしての熱硬化性樹脂と炭素繊維束１９とを含む繊維強化複合材である。被締結部材１８は板状に形成されており、炭素繊維束１９は互いに直交するＸ，Ｙ，Ｚ軸方向に沿って繊維束が配向された三次元構造をなす。被締結部材１８には締結用の貫通孔２０が形成されている。補強部材１５の外周面は被締結部材１８の貫通孔２０の内周面と対応した形状を有する。 The fastened member 18 is a fiber-reinforced composite material including a thermosetting resin as a matrix and a carbon fiber bundle 19. The fastened member 18 is formed in a plate shape, and the carbon fiber bundle 19 has a three-dimensional structure in which the fiber bundles are oriented along the X, Y, and Z axis directions orthogonal to each other. A fastening through hole 20 is formed in the fastened member 18. The outer peripheral surface of the reinforcing member 15 has a shape corresponding to the inner peripheral surface of the through hole 20 of the fastened member 18.
　図５に示すように、成形された補強部材１５は貫通孔２０の内周面に装着されている。補強部材１５は、貫通孔２０の内周面と補強部材１５の外周面との間に嵌め込みに要する図示しない隙間が形成された状態で、貫通孔２０内に配置されている。被締結部材１８の下面と金属材２１の上面とが当接するように被締結部材１８と金属材２１とが配置されており、被締結部材１８の貫通孔２０の軸線２０ａと金属材２１の貫通孔２２の軸線２２ａとが一致している。貫通孔２０及び貫通孔２２にはボルト２３が挿入されており、被締結部材１８と金属材２１とはボルト２３及びナット２４により締結されている。 As shown in FIG. 5, the molded reinforcing member 15 is attached to the inner peripheral surface of the through hole 20. The reinforcing member 15 is disposed in the through hole 20 in a state where a gap (not shown) required for fitting is formed between the inner peripheral surface of the through hole 20 and the outer peripheral surface of the reinforcing member 15. The fastened member 18 and the metal material 21 are arranged so that the lower surface of the fastened member 18 and the upper surface of the metal material 21 are in contact with each other. The axis 22a of the hole 22 coincides. Bolts 23 are inserted into the through holes 20 and 22, and the fastened member 18 and the metal material 21 are fastened by bolts 23 and nuts 24.
　従って、この実施形態によれば、第１の実施形態における（１）～（８）と同様の利点の他に次の利点を得ることができる。
　（１５）補強部材１５には第１フランジ部６及び第２フランジ部７が形成されないため、第１フランジ部６及び第２フランジ部７を形成するのに必要な材料及び加工にかかるコストを削減することができる。 Therefore, according to this embodiment, the following advantages can be obtained in addition to the advantages similar to (1) to (8) in the first embodiment.
(15) Since the first flange portion 6 and the second flange portion 7 are not formed on the reinforcing member 15, the material and the processing cost required for forming the first flange portion 6 and the second flange portion 7 are reduced. can do.
　（１６）補強部材１５には第１フランジ部６及び第２フランジ部７が形成されないため、成形後の補強部材１５を被締結部材１８の貫通孔２０に容易に嵌め込むことができる。
　本発明は、前記した各実施形態の構成に限定されるものではなく、本発明の趣旨の範囲内で種々の変更が可能であり、次のように実施することができる。 (16) Since the first flange portion 6 and the second flange portion 7 are not formed on the reinforcing member 15, the molded reinforcing member 15 can be easily fitted into the through hole 20 of the fastened member 18.
The present invention is not limited to the configuration of each of the embodiments described above, and various modifications are possible within the scope of the gist of the present invention, and can be implemented as follows.
　第１の実施形態及び第２の実施形態において、被締結部材１０，１８及び補強部材１，１５を構成する強化繊維は炭素繊維でなくてもよく、例えばガラス繊維であってもよい。被締結部材１０，１８及び補強部材１，１５に用いられる強化繊維の種類は１種類でなくてもよい。例えば補強部材１，１５において芯糸２，１６が炭素繊維であり、組糸３，１７がガラス繊維であるように複数の種類の強化繊維が用いられてもよい。また、例えば補強部材１，１５において組糸３，１７に芯糸２，１６よりも充分に細い糸を使用してもよい。その場合、組糸３，１７と芯糸２，１６とが組み合させることにより生じる芯糸２，１６の屈曲を少なくできる。 In the first embodiment and the second embodiment, the reinforcing fibers constituting the fastened members 10 and 18 and the reinforcing members 1 and 15 may not be carbon fibers, and may be glass fibers, for example. The type of reinforcing fiber used for the fastened members 10 and 18 and the reinforcing members 1 and 15 may not be one. For example, in the reinforcing members 1 and 15, a plurality of types of reinforcing fibers may be used such that the core yarns 2 and 16 are carbon fibers and the braided yarns 3 and 17 are glass fibers. For example, a thread sufficiently thinner than the core threads 2 and 16 may be used for the braiding threads 3 and 17 in the reinforcing members 1 and 15. In that case, bending of the core yarns 2 and 16 caused by combining the braid yarns 3 and 17 and the core yarns 2 and 16 can be reduced.
　第１の実施形態において、ボルト８の頭部８ａにおける座面を第１フランジ部６からはみ出さずに配置できる形状であれば、フランジ部６は円環状でなくてもよい。第１フランジ部６の径がボルト８の頭部８ａの径よりも小さい場合、ボルト８の頭部８ａと被締結部材１０とが接触して被締結部材１０にクリープ変形が生じる可能性が大きくなる。また、第１フランジ部６の径が大きすぎる場合、重量が増すという問題がある。このため、第１フランジ部６の径はボルト８の頭部８ａの径よりわずかに大きい程度であることが望ましい。好ましくは、第１フランジ部６の径は、（第１フランジ部６の径）＝（ボルト８の頭部８ａの径）＋（０．２×（被締結部材１０の板厚）であるのがよい。 In the first embodiment, the flange portion 6 does not have to be in an annular shape as long as the seating surface of the head 8a of the bolt 8 can be arranged without protruding from the first flange portion 6. When the diameter of the first flange portion 6 is smaller than the diameter of the head portion 8a of the bolt 8, there is a high possibility that the head portion 8a of the bolt 8 and the member to be fastened 10 come into contact with each other and the member to be fastened 10 undergoes creep deformation. Become. Moreover, when the diameter of the 1st flange part 6 is too large, there exists a problem that a weight increases. For this reason, it is desirable that the diameter of the first flange portion 6 is slightly larger than the diameter of the head 8 a of the bolt 8. Preferably, the diameter of the first flange portion 6 is (diameter of the first flange portion 6) = (diameter of the head 8a of the bolt 8) + (0.2 × (plate thickness of the fastened member 10)). Is good.
　第１の実施形態において、補強部材１の第１フランジ部６及び第２フランジ部７は芯糸２及び組糸３により組紐状組織に形成される際に、円筒部５と連続して形成されなくてもよい。例えば、束状の強化繊維により、円筒部５と第１フランジ部６と、あるいは円筒部５と第２フランジ部７とが別に形成された後に、樹脂により円筒部５と第１フランジ部６と、あるいは円筒部５と第２フランジ部７とが接合されてもよい。 In the first embodiment, the first flange portion 6 and the second flange portion 7 of the reinforcing member 1 are formed continuously with the cylindrical portion 5 when formed into a braided structure by the core yarn 2 and the braided yarn 3. It does not have to be. For example, after the cylindrical portion 5 and the first flange portion 6 or the cylindrical portion 5 and the second flange portion 7 are separately formed by bundle-like reinforcing fibers, the cylindrical portion 5 and the first flange portion 6 are made of resin. Alternatively, the cylindrical portion 5 and the second flange portion 7 may be joined.
　第１の実施形態において、補強部材１は必ずしも第１フランジ部６及び第２フランジ部７を含んでいなくても良い。補強部材１は、第１フランジ部６及び第２フランジ部７のいずれか一方のみを含んでいてもよく、第１フランジ部６及び第２フランジ部７の両方を含んでいなくてもよい。また、第２フランジ部７の形状は円環状でなくても良い。例えば、第２フランジ部７は、ボルト８の頭部８ａより小さい径を有していてもよい。 In the first embodiment, the reinforcing member 1 does not necessarily include the first flange portion 6 and the second flange portion 7. The reinforcing member 1 may include only one of the first flange portion 6 and the second flange portion 7, and may not include both the first flange portion 6 and the second flange portion 7. Further, the shape of the second flange portion 7 may not be an annular shape. For example, the second flange portion 7 may have a smaller diameter than the head 8 a of the bolt 8.
　第１の実施形態において、第１フランジ部６及び第２フランジ部７が被締結部材１０の表面から突出して配置されなくてもよい。例えば、被締結部材１０において貫通孔４の周囲は第１フランジ部６及び第２フランジ部７の厚みの分だけ板厚が薄く成形されてもよい。これにより、被締結部材１０の表面と第１フランジ部６及び第２フランジ部７の表面とが一平面上に配置される。この場合、被締結部材１０の貫通孔４の周囲においては、特開２００７－２６８９４１に開示されるように、繊維体積含有率（Ｖｆ）が高くなるため、クリープ抑制効果が高まる。 In the first embodiment, the first flange portion 6 and the second flange portion 7 may not be disposed so as to protrude from the surface of the fastened member 10. For example, in the member 10 to be fastened, the thickness of the periphery of the through hole 4 may be reduced by the thickness of the first flange portion 6 and the second flange portion 7. Thereby, the surface of the to-be-fastened member 10 and the surface of the 1st flange part 6 and the 2nd flange part 7 are arrange | positioned on one plane. In this case, the fiber volume content (Vf) is increased around the through hole 4 of the fastened member 10 as disclosed in Japanese Patent Application Laid-Open No. 2007-268941, so that the creep suppressing effect is enhanced.
　第１の実施形態において、第１フランジ部６が当接される締結部材はボルト８でなくてもよい。例えば、ボルト８が金属材１２の貫通孔１３側から挿入されて、被締結部材１０の貫通孔４の上端から突出したボルト８の先端に対してナット１４が締結された場合に第１フランジ部６とナット１４とが当接されてもよい。 In the first embodiment, the fastening member with which the first flange portion 6 abuts may not be the bolt 8. For example, when the bolt 8 is inserted from the through hole 13 side of the metal material 12 and the nut 14 is fastened to the tip of the bolt 8 protruding from the upper end of the through hole 4 of the member 10 to be fastened, the first flange portion 6 and the nut 14 may be in contact with each other.
　第１の実施形態において、補強部材１と被締結部材１０とは一体に成形されなくてもよい。補強部材１と被締結部材１０とがそれぞれ別に成形されて、成形後の被締結部材１０に形成された貫通孔４に補強部材１が嵌め込まれてもよい。 In the first embodiment, the reinforcing member 1 and the fastened member 10 do not have to be formed integrally. The reinforcing member 1 and the fastened member 10 may be formed separately, and the reinforcing member 1 may be fitted into the through hole 4 formed in the fastened member 10 after molding.
　第１の実施形態において、補強部材１及び被締結部材１０の製造方法は第１の実施形態に記載した方法に限らず、従来の繊維強化複合材の製造方法及び組紐状組織の製造方法並びに三次元織物の製造方法により製造されてもよい。 In the first embodiment, the manufacturing method of the reinforcing member 1 and the fastened member 10 is not limited to the method described in the first embodiment, and the conventional manufacturing method of the fiber-reinforced composite material, the manufacturing method of the braided tissue, and the tertiary You may manufacture with the manufacturing method of an original fabric.
　第１の実施形態及び第２の実施形態において、補強部材１，１５が配置される被締結部材１０，１８には強化繊維が含有されていなくてもよい。被締結部材１０，１８は例えば樹脂成形体であってもよい。 In the first and second embodiments, the fastened members 10 and 18 on which the reinforcing members 1 and 15 are disposed may not contain reinforcing fibers. The fastened members 10 and 18 may be resin molded bodies, for example.
　第１の実施形態及び第２の実施形態において、少なくとも貫通孔４，２０の内部において炭素繊維が貫通孔４，２０の軸線４ａ，２０ａ方向に沿って配向されていれば、炭素繊維が組紐状組織に形成されていなくてもよい。例えば、補強部材は平織りあるいは袋織り状の織物により形成されていてもよい。また、例えば貫通孔に対応する形状の凸部を有する成形型を用いて補強部材を成形する場合に、凸部の外周面に炭素繊維が貫通孔の軸線方向に沿って延びるように付着された状態で樹脂を注入して補強部材が成形されてもよい。これにより、貫通孔の内部に束状の炭素繊維を配置することができる。 In the first embodiment and the second embodiment, if the carbon fibers are oriented along the axial lines 4a and 20a of the through holes 4 and 20 at least inside the through holes 4 and 20, the carbon fibers are braided. It does not have to be formed in the organization. For example, the reinforcing member may be formed of a plain weave or bag-woven fabric. For example, when a reinforcing member is molded using a mold having a convex portion having a shape corresponding to the through hole, carbon fibers are attached to the outer peripheral surface of the convex portion so as to extend along the axial direction of the through hole. The reinforcing member may be molded by injecting resin in a state. Thereby, a bundle-like carbon fiber can be arrange | positioned inside a through-hole.
　第１の実施形態及び第２の実施形態において、貫通孔４，２０は、被締結部材１０，１８を成形する際に同時に形成されなくてもよい。貫通孔４，２０は、成形後の被締結部材１０，１８に対してドリル等の工具で孔開けをして形成されてもよい。また、孔開け後に、貫通孔４の周囲のバリ取りや不要部の切断等の外形加工が行われてもよい。 In the first embodiment and the second embodiment, the through holes 4 and 20 may not be formed at the same time when the members to be fastened 10 and 18 are formed. The through holes 4 and 20 may be formed by drilling the fastened members 10 and 18 after molding with a tool such as a drill. Further, after drilling, external processing such as deburring around the through hole 4 and cutting of unnecessary portions may be performed.
　第１の実施形態及び第２の実施形態において、被締結部材１０，１８の炭素繊維束１１，１９は三次元構造をなすように配向されていなくてもよい。例えば炭素繊維束１１，１９が二次元構造をなすように配向されていてもよいし、炭素繊維束１１，１９が一方向に沿って配向されていてもよい。 In the first embodiment and the second embodiment, the carbon fiber bundles 11 and 19 of the fastened members 10 and 18 may not be oriented so as to form a three-dimensional structure. For example, the carbon fiber bundles 11 and 19 may be oriented so as to form a two-dimensional structure, or the carbon fiber bundles 11 and 19 may be oriented along one direction.
　第１の実施形態及び第２の実施形態において、被締結部材１０，１８と締結される他の部材は、金属材１２，２０でなくてもよい。例えば、被締結部材１０，２０と締結される他の部材は、繊維強化複合材あるいは樹脂成形体であってもよく、壁、床や大地を構成する岩石等であってもよい。また、被締結部材１０，２０と締結される他の部材は板状である代わりに、棒状、柱状等別の形状であってもよい。 In the first embodiment and the second embodiment, the other members fastened to the fastened members 10 and 18 may not be the metal materials 12 and 20. For example, the other member to be fastened to the fastened members 10 and 20 may be a fiber reinforced composite material or a resin molded body, or may be a rock that constitutes a wall, a floor, or the ground. Further, the other members to be fastened to the fastened members 10 and 20 may have other shapes such as a rod shape or a column shape instead of the plate shape.
　第１の実施形態及び第２の実施形態において、芯糸２，１６の径と組糸３，１７の径とが異なってもよい。例えば、組紐３は芯糸２よりも十分細い糸であってもよい。その場合は、芯糸と組糸とを組み合せることで組紐状組織が形成される際に、芯糸と組糸とが接触される箇所において芯糸に曲がる、折れる等の変形が生じる恐れがなく、芯糸を貫通孔の軸線方向に沿って真っ直ぐに配向することができる。 In the first embodiment and the second embodiment, the diameters of the core yarns 2 and 16 and the diameters of the braids 3 and 17 may be different. For example, the braid 3 may be a thread sufficiently thinner than the core thread 2. In that case, when the braided structure is formed by combining the core yarn and the braid, there is a risk that deformation such as bending or breaking of the core yarn may occur at a portion where the core yarn and the braid are in contact with each other. The core yarn can be oriented straight along the axial direction of the through hole.
　第１の実施形態及び第２の実施形態において、貫通孔４，２０の一方の開口部から他方の開口部に亘って連続して配置される芯糸は１本の芯糸でなくてもよい。例えば、複数本の芯糸が貫通孔の軸線方向に沿ってつながることで、芯糸が少なくとも貫通孔４，２０の一方の開口部から他方の開口部に亘って隙間なく配置されていてもよい。 In the first embodiment and the second embodiment, the core yarn continuously arranged from one opening portion of the through holes 4 and 20 to the other opening portion may not be one core yarn. . For example, a plurality of core yarns may be connected along the axial direction of the through hole, so that the core yarn may be arranged at least from one opening portion of the through holes 4 and 20 to the other opening portion without a gap. .
　第２の実施形態において、芯糸１６は貫通孔２０の軸線２０ａに対して５°傾いて配向されていなくてもよい。例えば、芯糸１６が貫通孔２０の軸線２０ａに対して１０°傾いていてもよいし、芯糸１６が貫通孔２０の軸線２０ａ方向（芯糸１６の繊維軸と貫通孔２０の軸とがなす角度が０°となる方向）に沿って配向されていてもよい。好ましくは芯糸１６と貫通孔２０の軸線２０ａとのなす角度は１０°以内である。また、芯糸１６が屈曲していなくてもよく、例えば、芯糸１６が真っ直ぐな形状であってもよい。 In the second embodiment, the core yarn 16 may not be oriented with an inclination of 5 ° with respect to the axis 20a of the through hole 20. For example, the core yarn 16 may be inclined by 10 ° with respect to the axis 20 a of the through hole 20, or the core yarn 16 is in the direction of the axis 20 a of the through hole 20 (the fiber axis of the core yarn 16 and the axis of the through hole 20 are (The direction in which the angle formed is 0 °) may be oriented. Preferably, the angle formed by the core yarn 16 and the axis 20a of the through hole 20 is within 10 °. Further, the core yarn 16 may not be bent, and for example, the core yarn 16 may have a straight shape.
　第２の実施形態において、補強部材１５と被締結部材１８とが別に成形されなくてもよい。例えば、補強部材１５と被締結部材１８とが一体成形されてもよい。 In the second embodiment, the reinforcing member 15 and the fastened member 18 do not have to be formed separately. For example, the reinforcing member 15 and the fastened member 18 may be integrally formed.

Claims (5)

  1. 　樹脂成形体である被締結部材に形成されて締結部材が挿入可能な貫通孔の内部に配置される補強部材であって、マトリックスとしての樹脂と強化繊維とを含む繊維強化複合材である補強部材において、
    　前記強化繊維の少なくとも一部は、前記貫通孔の軸線方向に沿って配向されかつ少なくとも前記貫通孔の一方の開口部から他方の開口部に亘って配置される補強部材。     A reinforcing member that is formed in a member to be fastened that is a resin molded body and is disposed inside a through-hole into which a fastening member can be inserted, and is a fiber-reinforced composite material that includes a resin as a matrix and reinforcing fibers In
    A reinforcing member in which at least a part of the reinforcing fiber is oriented along the axial direction of the through-hole and disposed at least from one opening to the other opening of the through-hole.
  2. 　前記被締結部材は繊維強化複合材である請求項１に記載の補強部材。 The reinforcing member according to claim 1, wherein the member to be fastened is a fiber-reinforced composite material.
  3. 　前記強化繊維は組紐状組織を形成する請求項１または２に記載の補強部材。 The reinforcing member according to claim 1 or 2, wherein the reinforcing fibers form a braided structure.
  4. 　前記補強部材は、前記貫通孔の少なくとも一方の開口部から突出するとともに前記貫通孔の径方向外側に向かって延びるフランジ部を有し、同フランジ部は前記被締結部材と当接する請求項３に記載の補強部材。 The said reinforcing member has a flange part which protrudes from the at least one opening part of the said through-hole, and extends toward the radial direction outer side of the said through-hole, The said flange part contacts the said to-be-fastened member. The reinforcing member as described.
  5. 　補強部材が配置された被締結部材を、締結部材を用いて他の部材に締結するための締結構造であって、
    　前記被締結部材は、前記締結部材が挿入可能な貫通孔を有する樹脂成形体であり、
    　前記補強部材は、マトリックスとしての樹脂と強化繊維とを含む繊維強化複合材であり、
    　前記補強部材は前記貫通孔の内部に配置され、
    　前記強化繊維の少なくとも一部は、前記貫通孔の軸線方向に沿って配向されかつ少なくとも前記貫通孔の一方の開口部から他方の開口部に亘って配置される締結構造。     A fastening structure for fastening a member to be fastened in which a reinforcing member is arranged to another member using a fastening member,
    The fastened member is a resin molded body having a through hole into which the fastening member can be inserted,
    The reinforcing member is a fiber-reinforced composite material including a resin as a matrix and reinforcing fibers,
    The reinforcing member is disposed inside the through hole,
    A fastening structure in which at least a part of the reinforcing fiber is oriented along the axial direction of the through-hole and is disposed from at least one opening to the other opening of the through-hole.
PCT/JP2010/060116 2009-06-22 2010-06-15 Reinforcing member and fastening structure using same WO2010150682A1 (en)

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JP2009147369A JP5206599B2 (en) 2009-06-22 2009-06-22 Fastening structure of a to-be-fastened member in which a reinforcing member is disposed in a through hole and a reinforcing member that is a fiber-reinforced composite material disposed in a through hole for fastening formed in a to-be-fastened member that is a resin molded body
JP2009-147369 2009-06-22

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