| 摘要 |
The cylindrical shaped helically wound storage bin is comprised of a roof unit and a side wall structure each of which is separately formed and assembled together in the field. The wall structure and the roof unit are each formed from a continuous metal ribbon member. The ribbon member of the roof unit is helically wound and continuously interlocked in a stepped dome shape with the interlocking connection of the adjacent sides of the metal ribbon constituting riser portions of the steps and a reinforcing member for the roof unit. The metal ribbon of the bin wall structure is helically wound and continuously interlocked along the adjacent sides thereof in a cylindrical shape with the interlocking connection forming a continuous rigid reinforcing rib that projects outwardly from and extends spirally about and over the full height of the side wall structure. The lower end of the wall structure is mounted on a lower helical coupling section that is secured to a base or foundation to support the wall structure about a substantially vertical axis. The upper end of the wall structure and the outer peripheral section of the roof unit are relatively formed and interconnected by an upper helical coupling section to provide for the horizontal support of the roof unit on the wall structure.
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