To prevent an appearance defect of a seat rail, efficiently enhance the strength of the seat rail, and improve the manufacturing efficiency of the seat rail in a seat rail structure for a motorcycle.SOLUTION: The present invention relates to a seat rail structure for a motorcycle having a seat rail installed on a vehicle body of a motorcycle. In this structure, the seat rail has a side member which is a bending molded article made of continuous fiber reinforced resin, and the side member has: a side wall located at an outer end in a vehicle body width direction thereof; and an upper flange located at an upper end of the side wall and projecting inward in the vehicle body width direction from the side wall. The side wall has an upper fastening portion located in an upper end section of a front end region thereof and fastened to a main frame of the vehicle body. The upper fastening portion has an upper corner edge portion located astride a front edge portion and an upper edge portion thereof and is formed in an arc shape. A rear end of the upper corner edge portion is disposed in front of a front edge portion of the upper flange.SELECTED DRAWING: Figure 4

    【課題】自動二輪車用シートレール構造においては、シートレールの外観不良を防止し、シートレールの強度を効率的に向上させ、シートレールの製造効率を向上させる。【解決手段】本発明は、自動二輪車の車体に設置されるシートレールを有する自動二輪車用シートレール構造に関する。当該構造においては、シートレールが、連続繊維強化樹脂製の曲げ成形品である側方部材を有し、側方部材が、その車体幅方向の外方端に位置する側方壁と、側方壁の上端に位置し、かつ側方壁から車体幅方向の内方に突出する上側フランジとを有し、側方壁が、その前端領域の上端区域に位置し、かつ車体のメインフレームに締結される上側締結部分を有し、上側締結部分が、その前縁部及び上縁部に跨って位置する上側角縁部を有し、かつ円弧形状に形成され、上側角縁部の後端が、上側フランジの前縁部よりも前方に配置されている。【選択図】図4


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    Title :

    SEAT RAIL STRUCTURE FOR MOTORCYCLE


    Additional title:

    自動二輪車用シートレール構造


    Contributors:

    Publication date :

    2021-06-03


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B62K Fahrräder , CYCLES



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