Method of manufacturing supporting structure, swaging jig for use therein and the supporting structure

A supporting structure comprising:

• a pair of support walls opposed to each other with a supported member being interposed therebetween, the support walls and the supported member having shaft holes formed coaxially through the support walls and the support member respectively;
• and
• a shaft member inserted through the respective shaft holes of the support walls and the supported member, wherein:
• the shaft member has two ends each of which has a peripheral portion circumferentially divided into a plurality of swaging portions which are sequentially swaged such that regions of the shaft member corresponding to the respective swaging portions are fixed in the shaft holes of the respective support walls;
• and
• the corresponding regions of the swaging portions have outer peripheral edges which are formed into shapes differing from a complete circle over entire circumferences, respectively;
• the swaging portions include first swaging portions and second swaging portions, both of which are disposed so as to be paired at both radial sides of the shaft holes, respectively;
• and
• each first swaging portion has an impression of a groove deeper than each second swaging portion.