| 摘要 |
An elevator device that is installed on one or more ladders to lift loads from the ground to a desired position on a roof. A base securing device can be added to each of the ladders to insure stability. An outrigger mounted on a user's truck can be employed to further stabilize the ladders. The elevator device includes a ladder attachment assembly to affix the device to a ladder or ladders, a lateral travel section, and a roof top mounting device. A ladder stabilization bracket that affixes the ladder to a parapet or balcony can be employed for additional stability of the device. Several winch mechanisms are utilized to position the device and raise loads. The device can be easily adapted for use on flat roofs with a parapet through the addition of a ladder stabilization bracket. The elevator device can also readily be used on flat roofs without parapets, pitched roofs, and even to load trucks.
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