PROBLEM TO BE SOLVED: To provide a folding bicycle of which a rigidity is not lowered, and for which a weight of a reinforcement and a labor when assembling are not increased.SOLUTION: A head tube 2 and a front fork 5 are separated, a column which is projected from a lower end of the head tube is separated into a column upper part 3 and a column lower part 4, the front fork is laterally rotated by 90 degrees with a vertical shaft pin of a biaxial joint, which connects the upper and lower columns, as a fulcrum, and a frame is rotated around a handle post in a direction opposite to that of the front fork by 90 degrees, whereby the front fork and the frame are so arranged in parallel that phases of both are deviated from each other by 180 degrees, and consequently, the front fork and the frame do not collide with each other and can be perpendicularly folded.SELECTED DRAWING: Figure 1

    【課題】折りたたみ自転車において、剛性を低下させることなく、且つ補強材の重量増や、組み立て時の手間が増えることない折りたたみ自転車を提供する。【解決手段】ヘッドチューブ2とフロントフォーク5を切り離し、ヘッドチューブの下端から突き出したコラムをコラム上部3とコラム下部4に切り離し、コラム上下を接続させる2軸関節の縦軸ピンを支点とし、フロントフォークを横へ90度回転させ、ハンドルポストを中心にフレームをフロントフォークと反対方向へ90度回転させるとフロントフォークとフレームの位相が180度ずれて平行に並び、フロントフォークとフレームがぶつからず垂直に折りたためる。【選択図】図1


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    Title :

    BIAXIAL ROTARY FOLDING MECHANISM FOR FOLDING JOINT OF BICYCLE AND SIMPLE FIXATION MECHANISM


    Additional title:

    自転車の折り畳み関節2軸回転折りたたみ機構と簡易固定機構


    Contributors:

    Publication date :

    2017-06-29


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B62K Fahrräder , CYCLES



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