CIRCULAR POLYMER MANHOLE ASSEMBLY SYSTEM FOR PREVENTING COVER FROM BEING LEFT BY BACK FLOW, WHICH CAN BE INSERTED WITH CURVED LINE INSERTION METHOD WITHOUT MUTUAL INTERFERENCE OF CIRCULAR EDGE PROTRUDING PORTION OF COVER AND CIRCULAR EDGE SUPPORT FRAME OF SUPPORT FRAME, AND CIRCULAR MANHOLE ASSEMBLY THEREOF

摘要

According to the present invention, when a circular cover (30) is opened and closed by a hinge and coupling structure of a biased position outside a circle, an edge protruding portion (31) of the circular cover (30) is opened and closed in a circular edge support frame (12) of a support frame (10) without mutual interference. Moreover, with a curved line insertion method of a circular structure, which is a curved line insertion method by an operation model diagram of an S-shaped hinge curved line portion (33) and a rotating inclined angle () of the edge protruding portion (31), limitless circular arc interference can be removed.;COPYRIGHT KIPO 2017