JPS6442604A - Method for laying optical cable - Google Patents

Abstract

PURPOSE:To protect an optical cable by affixing lengthwise or winding spirally a reinforcing wire to a contact part, of the optical cable, with obstacles covering the outside periphery of the optical cable of a part to which the reinforcing wire has been installed, with a thermal contraction tube and reinforcing the optical cable. CONSTITUTION:To a part which comes into contact with a obstacle 12, of an optical cable 11, at least one piece of reinforcing wire 3 is affixed lengthwise, and the outside periphery of the optical cable 11 of the part to which this reinforcing wire 3 has been installed is covered with a thermal contraction tube. Also, when the reinforced part of the optical cable 11 is linear, the optical cable is bent at both end parts of the reinforced part, therefore, it is necessary that the reinforcing wire 3 is worked in advance to the allowable bend radius or above of the optical cable 11 for fitting an angle of bending. Accordingly, even if tension or vibration is applied to the optical cable, the optical cable 11 is not bent and the transmission loss is not increased, nor a protective covering 2 is damaged due to friction. In such a way, even in case of the optical cable whose mechanical strength after laying is small, it can be fully protected from various obstruction due to contact with an obstacle.