| 摘要 |
PROBLEM TO BE SOLVED: To provide a protection structure of falling stones or snow slide capable of preventing ropes from breaking and effectively absorbing shocks. SOLUTION: A plurality of supports 2, 2 are erected at every specified distance, the support 2 and a slant natural ground are connected by a stretcher rope 22.As a pulling coil spring 25 stretches by a pulling force acting on the stretcher rope 22 is set, when a shock such as falling stones, a pulling force generates in the stretcher rope 22. Thereby, the coil spring stretches, the energy of shocks can be absorbed by elongation of the pulling coil spring 25. COPYRIGHT: (C)2005,JPO&NCIPI
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