| 摘要 |
The double winch (2) cooperates with lifting wires or chains (9,10). The winch is placed on top of a house (1), on opposite sides of which the tower (5,6) to be raised are pivotably (7,8) located on foundations (3,4). - The towers are laid outwards from the house with their pivot axes parallel to the axis of the winch. The winch then functions to pull up the towers equally, maintaining a force balance. Above the winch can be positioned a vertical column, and the lifting wires can be drawn over a breaker wheel positioned at the top of the column to reduce stress and power requirement when the raising process commences.(1) |
