A BLIND BOARD APPARATUS FOR SEWAGE PASSAGE

摘要

The present invention relates to a blind board apparatus for a sewage passage which can be installed by increasing or reducing a blind board depending on a size of the exposed section of a sewage passage; has the durability of the apparatus improved by configuring the blind board to be opened or closed separately or simultaneously depending on a pressure of a sewage, rainwater, and an initial rainwater discharged through the sewage passage; prevents leakage of smell by partially overlapping each blind board; and facilitates an inspection of the inside of the sewage passage by keeping the blind board raised.