To suppress local stress concentration at a fastening portion of a seat rail in a motorcycle seat rail, and eventually, effectively improve the strength of the seat rail.SOLUTION: A seat rail 10 of a motorcycle 1 according to the present invention has two side members 20 configured using fiber-reinforced resin. Each side member 20 has a main body part 21 and an upper flange part 22 that protrudes in a width direction of a vehicle body from an upper side edge of the main body part 21. An attachment element T for attachment to a main frame 2 of the vehicle body is provided at a front end portion 20a of each side member 20. The seat rail 10 has at least one upper connecting member 30 that connects the two upper flange parts 22. The upper flange part 22 has an inflection section 22c connecting front and rear sections 22a, 22b of the upper flange part so as to raise the rear section 22b upward above the front section 22a, and the inflection section 22c is disposed between the front end portion 20a of the side member 20 and the foremost upper connecting member 30.SELECTED DRAWING: Figure 2

    【課題】自動二輪車のシートレールにおいて、シートレールの締結部分の局所的な応力集中を抑制し、ひいては、シートレールの強度を効率的に向上させる。【解決手段】本発明の自動二輪車1のシートレール10は、繊維強化樹脂を用いて構成される2つの側方部材20を有し、各側方部材20が、本体部21と、この本体部21の上側縁から車体の幅方向に突出する上側フランジ部22とを有し、各側方部材20の前方端部20aに、車体のメインフレーム2に取り付ける取付要素Tが設けられ、シートレール10が、2つの上側フランジ部22を連結する少なくとも1つの上側連結部材30を有し、上側フランジ部22が、その後方区域22bをその前方区域22aよりも上方に向かって持ち上げるように前方及び後方区域22a,22bを連結する変曲区域22cを有し、変曲区域22cが、側方部材20の前方端部20aと最前方の上側連結部材30との間に配置される。【選択図】図2


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    Title :

    SEAT RAIL OF MOTORCYCLE


    Additional title:

    自動二輪車のシートレール


    Contributors:

    Publication date :

    2020-08-31


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B62K Fahrräder , CYCLES / B62J Fahrrad- oder Motorradsättel oder -sitze , CYCLE SADDLES OR SEATS



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