| 摘要 |
PURPOSE: A height adjustment manhole using a pin fixing method is provided to simply control the height of a manhole. CONSTITUTION: A height adjustment manhole using a pin fixing method is composed as follows: Hanger pin fixing grooves(21) are formed on the outer surface of an upper body(2) in a longitudinal direction. Hanger pins(30) corresponded with the hanger pin fixing grooves are formed in the inner walls of hanger hoops(3). The hanger pins of the hanger hoops are coupled with the hanger pin fixing grooves, and mounted in hanger hoop mounting grooves(12) of a lower body(1). |
