| 摘要 |
<p>PURPOSE:To prevent the break of an optical fiber, by meshing teeth of a sash roller, which has teeth at the same pitch as the winding pitch of a wound self- supporting optical cable, with recessed parts of the optical cable and raising the optical cable to lay it while rotating the sash roller. CONSTITUTION:A wound self-supporting optical cable 10 is raised through a sash roller 14 attached to a pole 12 and is laid. The sash roller 14 has plural teeth 14a at the same pitch P as the winding pitch P of an optical cable main body 10B, and these teeth 14a is meshed with recessed parts 10D of the optical cable 10, and the optical cable 10 is fed while engaging teeth 14a with a messenger wire 10A, and thus, the break of the optical fiber is prevented.</p> |
