PROBLEM TO BE SOLVED: To provide a structure where increase in weight can be suppressed in a back frame having a structure formed by joining a side frame and an upper frame while joint strength thereof is secured.SOLUTION: A portal back frame is formed by inserting at least part of a second side frame part 33 of a second frame member 30 which is formed by subjecting a first side frame part 31 extending in a longitudinal direction, a second side frame part 33 extending in a longitudinal direction and an upper frame part 32 as one piece of pipe-like member to bending work, into a closed cross-sectional shape part 27 of a first frame member 20 extending in a longitudinal direction and becoming unified.

    【課題】サイドフレームとアッパフレームを接合して形成する構造のバックフレームにおいて、接合強度を確保しながら重量の増加を抑えることができる構造を提供する。【解決手段】上下方向に延びる第1フレーム部材20の閉断面形状部内27に、上下方向に延びる第1サイドフレーム部分31と、上下方向に延びる第2サイドフレーム部分33と、アッパフレーム部分32とが1本のパイプ状部材の曲げ加工により形成された第2フレーム部材30の第2サイドフレーム部分33の少なくとも一部を挿入して一体化し、門型のバックフレームを形成する。【選択図】図1


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    Title :

    BACK FRAME STRUCTURE OF VEHICLE SEAT


    Additional title:

    乗物用シートのバックフレーム構造


    Contributors:

    Publication date :

    2015-06-04


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B60N SEATS SPECIALLY ADAPTED FOR VEHICLES , Sitze besonders für Fahrzeuge ausgebildet



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