| 摘要 |
PURPOSE: A manhole assembly unit including a manhole cover locking device is provided to easily open or close a manhole cover and prevent a bolt and a screw unit from being damaged during the opening and closing of the manhole cover. CONSTITUTION: A manhole assembly unit(100) including a manhole cover locking device comprises a manhole frame(120), a manhole cover(140), a support unit(150), a support block(170), and a bolt(180). The manhole frame is mounted on a support protrusion(124) of the manhole frame and comprises a penetration hole(142) in the center. The support unit is arranged in an inner side of the manhole frame. The support block accommodates a semi-spherical type upper part of a body unit of the support unit. The bolt is rotatably installed at the manhole cover and is connected to the support block and the support unit. |
