PROBLEM TO BE SOLVED: To provide a vehicle body frame structure for a motorcycle, which is capable of improving the appearance of a frame plate member and achieving light weight.SOLUTION: A vehicle body frame is provided with: a down frame extending downward from a head pipe; and a main frame 6L extending from a lower part of the down-frame toward a vehicle body rear side. At least a part of the main frame 6L is formed closed in section by joining a pair of frame plate members 20o and 20i having joint flanges 20f at both upper and lower ends from left and right in a vehicle width direction. A longitudinal section member such as a tandem step bracket 30 that vertically crosses a side wall part 20s in the side view of a vehicle is joined to the roughly flat side wall part 20s positioned between the upper and lower joint flanges 20f of at least the frame plate member 20o.SELECTED DRAWING: Figure 4

    【課題】フレーム板部材の見栄えの向上と車両の軽量化を図ることができる自動二輪車の車体フレーム構造を提供する。【解決手段】車体フレームは、ヘッドパイプから下方に延出するダウンフレームと、該ダウンフレームの下部から車体後方側に向かって延出するメインフレーム6Lと、を備えている。メインフレーム6Lの少なくとも一部は、上下の両端部に接合フランジ20fを有する一対のフレーム板部材20o,20iが車幅方向の左右から相互に接合されて閉断面形状に形成されている。少なくとも一方のフレーム板部材20oの、上下の接合フランジ20f間に位置される略平坦な側壁部20sには、車両側面視で側壁部20sを上下方向に横切るタンデムステップブラケット30等の縦断部材が接合されている。【選択図】図4


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    Title :

    VEHICLE BODY FRAME STRUCTURE FOR MOTORCYCLE


    Additional title:

    自動二輪車の車体フレーム構造


    Contributors:

    Publication date :

    2017-04-06


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B62K Fahrräder , CYCLES



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