| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a pneumatic method for laying cables which can further lay a long optical cable additionally within an existing sheath pipe where one or more cables are already laid and further are cut and opened within hand holes or the like. SOLUTION: This method is one, in which a long vinyl bag 3 with a proper diameter is passed, covering the entire length by a jig 2 for vinyl bag pressure sending, prior to pneumatic sending of an additional optical fiber cable 19 into an existing sheath cable 1, and in the condition that this vinyl bag 3 is expanded by air, the glove passage test of a glove 10 with a proper diameter is performed to confirm the security of the passage of an additional optical fiber cable 19, and then the additional optical fiber cable 19 is sent pneumatically into the vinyl bag 3, and here the existing cable 9 and the additional light cable 19 are isolated by the vinyl bag 3, so the fear of both being entangles with each other or the upper one passing under the under one disappears. Accordingly, smooth multi-line cable laying can be materialized.</p> |
