| 摘要 |
A safety apparatus (1) comprises a left part (1) and a right part (20) which are mirror images of each other. The left part (1) comprises a frame (2) having an inner portion (10) with an upper hook (11) and a lower hook (12) for engaging a ladder in-between the ladder rungs. There is a cranked portion (13) in the frame (2), and an outer portion having an arm (15) and a brace (16) splayed out to the side. The arm 15 terminates in a ground-engaging foot (14). Thus, as viewed in plan, the left and right parts are splayed out as best viewed in Fig. 3. A tensioned elasticated rope support (3) has hooks (5, 6) at its ends, the hook (5) engaging the foot (14) and the foot (6) engaging a ladder L rung. An alternative frame (100) has an arm (104) extending at an angle to the plane of the inner end (101) and is bent downwardly so that its end forms a ground foot (105). This arrangement allows a single length of tube to form the inner portion S-shape, the bend for splaying out, the outer portion arm, and the ground-engaging foot. It is therefore of lightweight and high strength construction while being inexpensive to manufacture. The safety apparatus is very easily attached to a ladder. As the ladder 1 is being user there is excellent resistance to slipping and sliding of the ladder away from the wall because there are four ground- engaging feet. Also, there is much reduced risk of the ladder swaying to a side because of the fact that the parts 1 and 20 are splayed out. |
