| 摘要 |
<p>PROBLEM TO BE SOLVED: To simplify installation of lifting tools in cable installation work for higher installation workability, by forming a flexible coil body which is formed in a continuous spiral form out of either a linear body metal wire of which is covered with synthetic resin, or stranded wire at which several linear bodies are stranded. SOLUTION: A chain coil 10 for cable installation consists of a flexible coil body 1 which is formed in a spiral and continuous form out of either a linear body or stranded wire. Sleeves 2, which are fixed on an electric pole or messenger wire, are connected to both the ends of the chain boil 10. Only single operation of simply extending the chain coil 10 to between the electric poles forms all suspension points which suspend a cable at regular intervals through a spiral loop, thereby attaining cable installation. It is thus possible to use, after the cable installation, the chain coil 10 left as it is for a lifting tool for fixing the cable, and to eliminate temporary installation using a jig for cable installation.</p> |
