| 摘要 |
PROBLEM TO BE SOLVED: To solve a problem that: conventionally, a roof snow-melting method or a snow removal method causes high installation costs and also a maintenance cost such as power and fuel costs increases, therefore such a method is not generally in widespread use currently.SOLUTION: In a basic structure, a movable part such as a sheet is preliminarily laid on a roof and it is moved after snow is accumulated to make an accumulated snow part fall. In regard to this, there is a method in that: traction parts such as wire-shaped ones are respectively attached to upper and lower ends of the movable part such as the sheet, a sheave or a ring-shaped part is installed at the top edge of the roof, the traction wire or the like at the upper end is loosened when the movable part such as the sheet is moved, and the traction wire or the like at the lower end is pulled, thus making snow fall accumulated snow part fall by its own weight. Alternatively, there is a method in that: a part or all of the upper end of a sheet or the like and a traction rope or the like are made of elastic materials such as rubber-like or spring-shaped materials, the traction rope or the like attached to the lower end is pulled and repeatedly pulled down to shake the traction rope, thus making the accumulated snow part fall by its own weight. |
