OPTICAL FIBER CABLE

PROBLEM TO BE SOLVED: To provide an optical fiber cable which offers both ease of work in taking out optical fiber cores and cicada resistance.SOLUTION: Jacketed tension members 40, each comprising a tension member 20 covered with a jacket 30, are positioned to sandwich optical fiber cores in a firs...

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Hauptverfasser: TAKAMIZAWA KAZUTOSHI, KURAMOTO KEITA, MATSUZAWA TAKASHI, DAIDO JUNJI, AOYANAGI YUJI, IIO HIRONARI, OKADA NAOKI, SHIOBARA SATORU
Format: Patent
Sprache:eng ; jpn
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Zusammenfassung:PROBLEM TO BE SOLVED: To provide an optical fiber cable which offers both ease of work in taking out optical fiber cores and cicada resistance.SOLUTION: Jacketed tension members 40, each comprising a tension member 20 covered with a jacket 30, are positioned to sandwich optical fiber cores in a first direction. An outer jacket 50 entirely covers the optical fiber cores 10 and the jacketed tension members 40. The outer jacket 50 is made of a material having a yield point strength y that satisfies 10 MPa≤ y≤26 MPa. A closest point Pz, which is on a surface of the jacketed tension member 40 in a second direction perpendicular to the first direction among surfaces thereof facing the optical fiber cores 10 and is closest to a surface of the outer jacket 50, and a closest distance z to the surface of the outer jacket 50 therefrom satisfy z≥156.2 y. 【課題】光ファイバ心線を取り出す良好な作業性と耐セミ性とを両立させることができる光ファイバケーブルを提供する。【解決手段】抗張力体20を被覆物30で被覆した抗張力体被覆体40は、光ファイバ心線を第1の方向から挟むように配置されている。外被50は、光ファイバ心線10及び抗張力体被覆体40との全体を被覆する。外被50を形成する材料は、降伏点強度 yが、10MPa y 26MPaを満たす。抗張力体被覆体40における光ファイバ心線10と対向する側の面のうち、第1の方向と直交する第2の方向の面の外被50の表面に最も近い最近位置Pzと、外被50の表面との最短距離zは、z 156.2 y−2.06を満たす。【選択図】図2