| 摘要 |
A locking type double manhole cover is provided to open and close a manhole easily in case of simple work having no necessity of a worker getting in a manhole, and to prevent an accident. A locking type double manhole cover comprises a main cover(100) opening and closing a manhole, and having a holding end(130) on the inside and at least one operating groove(140) provided with a fastening hole on the inside and the outside and a hanging end having a guide way on the outside of the fastening hole, a fixing frame(200) coupled to the top of a manhole and provided with a hanging projection(210) to place the main cover and a fixing hole(220) on the inside, an auxiliary cover(300) placed on the holding end of the main cover to open and close the main cover and provided with a locking hole on the outside, a main coupler(400) fixing the main cover not to be separated from the fixing frame and having a main handle on a longitudinal side and a main separation prevention projection inserted to the fastening hole of the main cover through the guide way formed on the hanging end of the main cover, and an auxiliary coupler(500) fixing the auxiliary cover not to be separated from the main cover and having an auxiliary handle on a longitudinal side and an auxiliary separation prevention projection inserted to the fastening hole of the main body through the guide way formed on the hanging end of the main cover. |
