| 摘要 |
PROBLEM TO BE SOLVED: To make a forwarding operation of a thin metal raw member accurate with reference to a roll forming machine, which forms a building plate from the thin metal raw member, even in a process especially where a member such as a sheet-like solar member is mounted on its face and the building plate is molded in a manner that bent portions are asymmetric at right, left ending portions in a width direction. SOLUTION: In the roll forming machine which forms the building plate having different bending end portions 16, 17 at right, left ending parts in width direction of a main plate 15 out of a thin plate metal raw member P0, plural steps of guide rolls C, composed of a guide roll part 5 freely rotatable on the surface abutting to the bending end part 17 already formed on the other end side in width direction, are provided against a finish process forming group B which forms the bending end part 16 at one end or other end in width direction of the member P0.
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