| 摘要 |
PURPOSE: A locker of a manhole cover with a hinge, which prevents the displacement of a manhole cover is provided to maintain the safe working space when opening a manhole case. CONSTITUTION: A locker of a manhole cover with a hinge comprises a case(10), a cover main body(20), a fastening member(30) and a manhole cover opening angle retaining member. A lid mount(12) and a first hinge joint(17) are located on the case. The lid body is installed on the lid mount of the case. A second hinge joint(23) is connected to the lid body to rotate on the first hinge joint of the case. The manhole cover opening angle retaining member is installed in the hinge binding site. The manhole cover opening angle retaining member prevents the sudden closing of the manhole cover. |
