| 摘要 |
The present invention relates to a falling-stone preventing facility of a dual connection structure with improved safety. Cross-shaped couplers are arranged on the top of a falling-stone preventing net for preventing falling stones in a lattice form. Wire ropes and the couplers are connected by tension springs. The adjoining wire ropes around the couplers are connected to additional auxiliary ropes, thus an emergency that the tension springs are cut is prevented. In addition, a state identification plate easy to recognize the outside is installed at intersecting points of the auxiliary ropes to be separated when the tension springs are cut, thus a manager of the falling-stone preventing facility is able to easily check an abnormal wire rope connection state with the unaided eye. |
