Installation method of panel and rail-type fixing apparatus

A rail type fixing apparatus adapted to attach long flat shaped panels together where each long flat shaped panel has two long and two short edges, a projection and a first hook groove on one side of the long edges, an insertion groove and a second hook groove on the other side of the long edges, the fixing apparatus comprises:

• a long shaped rail with a lower surface, which is placed on an attachment surface, an upper surface on which a long flat shaped panel is mounted, and a guide groove extending in the longitudinal direction of the rail;
• a plurality of attachment panels each having a bottom surface and a top surface, guide panels extending from the bottom surface where the plurality of attachment panels are guided in the guide groove and installed movably in the longitudinal direction of the rail, and having a hook projection extending from the top surface thereof to which a first hook groove of the long flat shaped panel and a second groove of a neighboring long flat shaped panel are hooked and maintained, and which is projected in an upper direction and formed in a direction perpendicular to the longitudinal direction of the rail;
• and
• an elastic member arranged elastically between an attachment panel and an adjacent attachment panel in order to have respective hook projections of the attachment panel and the adjacent attachment panel drawn toward each other by the elastic restoring force of the elastic member;
• wherein the plurality of attachment panels are arranged in a line, without overlapping one another, in the rail and adjacent attachment panels are tensioned by the elastic member.