| 摘要 |
The present invention provides a manhole cover opening apparatus comprises: an opening module; a caster assembly; and a protection module. The opening module comprises: a first unit clamping an edge of a manhole cover; a screw rod extended from the upper side of the first unit; a second unit allowing the screw rod to pass through and supporting a surrounding ground surface of the manhole cover; and a third unit transferring a driving force to the screw rod while rotating the screw rod in one direction, the driving force allowing the manhole cover fixedly locked into the first unit to be elevated up together with the first unit. The caster assembly is included in a lower side of the second unit to be in rolling contact with the surrounding ground surface. The protection module is included in the opening module to receive the caste assembly between the second unit and the surrounding ground surface. According to the present invention, the manhole cover fixated for a long time is effectively and rapidly separated from a manhole entrance to be opened, thereby preventing deformation and damage due to pressure and a load applied to a specific part of the manhole cover opening apparatus. |
