To obtain desired connection strength of the coated optical fiber while using chemicals which are free from of problems concerned in danger or toxicity.
This jacket removing device consists of a swelling liquid tank 3 which contains swelling liquid 2, a jacket clamp 4 which clamps an end part of the coated optical fiber 1 dipped in the swelling liquid 2, a coated optical fiber clamp 5 which grips the coated optical fiber 1 almost vertically, a tension spring 6 which gives an upward tensile force to the coated optical fiber 1 by elevating the coated optical fiber clamp 5, and an ultrasonic vibration generating device 7 which gives ultrasonic vibration to the swelling liquid. Then a cut in a circumferential direction is formed in the outer periphery nearby the end part of the coated optical fiber 1 in advance and aceton, etc., is used as the swelling liquid. When the jacket of the coated optical fiber 1 dipped in the swelling liquid swells as specified, the adhesive strength to the glass fiber decreases and the jacket peels; and the upward tensile force is applied to the coated optical fiber 1 by the tension spring 6, so the coated optical fiber 1 is lifted while the jacket is left in the jacket clamp 4.
NOMOTO AKIMASA
YAGUCHI HISANOSUKE
YOSHINUMA MIKIO
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