CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a U.S. national stage application of International Application No. PCT/JP2017/016000, filed on Apr. 21, 2017.

BACKGROUND

Technical Field

The present invention relates to a connection structure for a fiber-reinforced resin component and a method for producing a fiber-reinforced resin component.

Background Information

A structure for attaching a first part made of fiber-reinforced resin to a second part is known in the prior art (for example, refer to Japanese Laid-Open Patent Application No. 2007-292106—Patent Document 1).

Japanese Laid-Open Patent Application No. 2007-292106 (Patent Document 1) discloses a joint structure of a carbon fiber-reinforced resin material in which a carbon fiber-reinforced resin material and a member to be joined are joined by a joining means. In the carbon fiber-reinforced resin material of this joint structure, the amount of linear expansion in the stacking direction due to a change in temperature is reduced by stacking a first stacking portion and a second stacking portion with a carbon fiber surface direction that is orthogonal to the carbon fiber surface direction of the first stacking portion. In addition, according to the joint structure of a fiber-reinforced resin disclosed in Patent Document 1, the member to be joined is fastened to the carbon fiber-reinforced resin material with a nut and bolt.

SUMMARY

In the structure described above, since the first part and the second part are fastened with a nut and bolt, it is unlikely that the connection between the first part and the second part (fastening with the nut and bolt) will be released due to the input of a relatively large load on the first part or the second part. Fastening with a nut and bolt reduces workability and could result in increased costs, so that a change from fastening with a nut and bolt to adhesion with an adhesive is considered. However, merely bonding the first part and the second part with an adhesive gives rise to the concern that the connection between the first part and the second part (adhesion by means of the adhesive) will let go with the input of a relatively large load on the first part or the second part, causing the first part and the second part to separate.

Therefore, an object of the present invention is to prevent the first part and the second part from separating, even if the connection between the first part and the second part (adhesion by means of the adhesive) is released due to an input of a relatively large load to the first part or the second part.

A first aspect of the present invention is a connection structure of a fiber-reinforced resin component, comprising a first part made of fiber-reinforced resin, a second part made of fiber-reinforced resin that is bonded to the first part, and connecting fibers that connect the first part and the second part. One end portion of the connecting fibers is sandwiched between first fiber layers of the first part, and the other end portion of the connecting fibers is sandwiched between second fiber layers of the second part.

A second aspect of the present invention is a method for producing a fiber-reinforced resin component. This production method comprises a step for exposing an intermediate portion between one end portion and the other end portion of connecting fibers from first fiber layers and second fiber layers, by sandwiching one end portion of the connecting fibers between the first fiber layers and sandwiching the other end portion of the connecting fibers between the second fiber layers. In addition, the above-mentioned production method further comprises a step for impregnating the first fiber layers and the second fiber layers with matrix resin, without impregnating the intermediate portion of the connecting fibers with the matrix resin.

According to the present invention, it is possible to prevent the first part and the second part from separating even if the connection between the first part and the second part (adhesion by means of the adhesive) is released due to the input of a relatively large load on the first part or the second part.

