MANHOLE COVER WITH A DEVICE FOR PREVENTING SEPARATION

摘要

A manhole cover with a returning preventive device is provided to increase the workability by easily opening the manhole cover using an eccentric cam for opening a lid. A manhole cover with a returning preventive device comprises a manhole frame(5) and a manhole lid(11). A jaw part(2) is formed at the inner side circumference of a manhole frame. A flange part(3) is formed at the lower end of outer surface circumference of the manhole frame. A hinge binder(4) is formed at the outer side surface of the manhole frame. The manhole lid is installed on the top of the manhole frame. A hinge-joint piece(7) is protruded on one side of circumferential surface of the manhole cover. The hinge-joint piece is inserted into and connected with the hinge binder of the manhole frame with a hinge pin(6). A barrier groove(8) for the lid is formed at the other side of the circumferential surface of the manhole cover.