Method of manufacturing sz-slot type optical cable

摘要

Torsional fixation portions 3 and 10 holding an SZ slotted body having spiral grooves turning over alternately in the surface of its column body are provided to prevent the SZ slotted body 1 from being distorted, and between the torsional fixation portions 3 and 10, a groove fixation device 6 with one or more protrusions projecting into the spiral grooves of the SZ slotted body 1 to prevent the grooves from turning in the sectionally circumferential direction is provided. The SZ slotted body 1 is passed through the groove fixation device 6 while the SZ slotted body 1 is advanced straight. Optical fibers are introduced and stored into the grooves of the SZ slotted body 1 in the vicinity of the groove fixation device 6, and immediately a pressing winding 7 consisting of yarn, tape or the like is given onto the SZ slotted body 1.