Production manner null of optical huaibakeburu and optical

摘要

This invention relates to an optical fiber cable (20). To reduce the diameter of the cable (20), high tensile strength synthetic resin fibers are bundled to obtain a bundle (23) and the outer periphery of the bundle (23) is covered with a synthetic resin coating (24) to obtain a core (22). Helical grooves (25) for receiving and accommodating optical fiber core wires (21) are formed on the core (22) in a longitudinal direction. The optical fiber cable (20) is produced by using this core (22). When the optical fiber core wires (21) are inserted into the helical grooves (25), the invention provides a method of producing the optical fiber cable (20) in which the core (22) is held to eliminate any fluctuation of the optical fiber core wires (21) occurring in the rotating direction around the axis of the core (22) and in which the optical fiber core wires (21) are stably inserted.