| 摘要 |
PROBLEM TO BE SOLVED: To provide a safety ladder capable of stably fixing a vertical support post to a movable support post (movable unit) with simple configurations to enable an operator to descend after attaching a safety belt. ! SOLUTION: A safety ladder 10 includes: a ladder 20; and a movable unit 50 having a movable post 30 and a pair of right operation post 40A and left operation past 40B. A right engagement part 41A and a left engagement part 41B are respectively disposed at the lower parts of the right operation post 40A and the left operation part 40B, and a right engaged part 24A and a left engaged part 24B to be engaged with the right engagement part 41A and the left engagement part 41B are respectively disposed at the upper parts of a right vertical support post 21 and a left vertical support post 22, and a right engagement part 42A and a left engagement part 42B arranged at the lower sides of a right-upper support part 34A and a left-upper support part 34B, and formed so as to lock the right- |
