To provide the constitution member of a seat frame which can simply be manufactured with the minimum number of parts, and a method for manufacturing the same.
As material for manufacturing a seat-part frame and a seatback frame being the constitution members of the seat frame 1, the seat frame is provided with an extruded aluminum material 15 having a pair of bar-like edge frame forming parts 16 arranged separately in parallel and a plate-like receiving plate forming part 17 positioned between both of the parts 16 and connecting both of the parts 16 integrally. A large number of slots S are formed in staggering pattern at the part 17 of this material 15. Stretching work for expanding both of the parts 16 in a separating direction is given at the part 17 to expand the part 17 in the state of a net to forming a receiving plate part 12.
HAMANO HIDEMITSU
MINAMI KAZUHIKO
