LADDER AND MANHOLE WITH FALLING PREVENTIVE TOOL FOR MANHOLE

PROBLEM TO BE SOLVED: To provide a manhole an opening part of which is safe especially at the time of going in and out of the manhole at the time of going up and down in a water reservoir tank, etc., and which prevents falling at the time of opening a cover of the manhole. SOLUTION: Two of upper and lower fixed shafts 5, 15 are separately provided in the neighbourhood of upper end parts of both leg parts 2 of a ladder main body 1 roughly vertically fixed on an inwall surface of a water reservoir tank, etc., or its manhole 18. Thereafter, falling preventive tools are respectively fixed free to revolve against both of the leg parts 2 and by a fixing means in vertical and horizontal states by respectively inserting the upper part fixed shaft 5 in a slot 12 formed on a connecting member 9 of the falling preventive tools 4 set on an opening part of the manhole and the lower part fixed shaft 15 in a slot 14 formed on the other end of a holder member 11 constituted with its one end axially installed on the connecting member 9 free to revolve.