| 摘要 |
PURPOSE: To make it possible to efficiently pass an optical fiber without damaging the fiber even in cases of a small diameter pipe-line, a square pipeline and a tape-like optical fiber, etc., by driving and passing the optical fiber by the progressive waves generated by an ultrasonic vibrator disposed in the pipeline. CONSTITUTION: The progressing waves generated by the phase control of ultrasonic vibration are utilized as driving and feeding force in passing the optical fiber 3 into the pipeline 1. Namely, the pipeline 1 is provided with the ultrasonic vibrator 2 so that the diameter is smaller than the inside diameter of the pipeline. The ultrasonic vibrator 2 is so formed that its inside surface side comes into contact with the optical fiber 3. The ultrasonic vibrators 2 are preferably installed in plural places in tandem at the pipeline 1. The ultrasonic vibrators are required to be installed at plural points particularly in the case of the passing the fiber at a long distance. The intervals of the installation for this purpose may be determined by taking the shape, unit weight and passing distance of optical fiber and the driving and passing force of progressive waves into consideration. |
