PROBLEM TO BE SOLVED: To provide a structure where increase in weight can be suppressed while joint strength is secured even when using light alloy material for an upper frame, a side frame and a bracket, in a back frame having a structure formed by joining the upper frame and the side frame via the bracket.SOLUTION: A back frame 10 is formed into a portal shape by joining an upper end part of a first frame 20 extending in a longitudinal direction, and a tip end part of a second frame 30 extending in a longitudinal direction and also extending while curving in a horizontal direction from mid-course via a belt guide bracket 40. The first frame 20 has a closed cross-sectional shape part 27. The second frame 30 also has a closed cross-sectional shape part 37. A first engagement part 42 of the belt guide bracket 40 is inserted into the closed cross-sectional shape part 27 of the first frame 20 to be fixed, and a second engagement part 43 of the belt guide bracket 40 is inserted into the closed cross-sectional shape part 37 of the second frame 30 to be fixed.

    【課題】アッパフレームとサイドフレームをブラケットを介して接合する構造のバックフレームにおいて、アッパフレームやサイドフレームやブラケットに軽合金の材料を使用した場合でも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20の上端部と、上下方向に延びるとともに途中から左右方向に曲がって延びる第2フレーム30の先端部をベルトガイドブラケット40を介して結合し、門型に形成したバックフレーム10であって、第1フレーム20は、閉断面形状部27を有し、第2フレーム30も閉断面形状部37を有し、ベルトガイドブラケット40の第1係合部42を第1フレーム20の閉断面形状部27に差し込んで固定し、ベルトガイドブラケット40の第2係合部43を第2フレーム30の閉断面形状部37に差し込んで固定する。【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 / A47C Stühle , CHAIRS



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