| 摘要 |
PURPOSE:To obtain a small-sized captioned device of a light weight by reciprocating light by means of optical fiber bundles pulling a moving detector by itself. CONSTITUTION:A moving detector 10 is fitted in a guide groove 9 provided between draft devices 2 and snail wires 3 on a machine table 8 of a spinning frame. One ends of a light-emitting optical fiber bundle 11 and a light-receiving optical fiber bundle 12 are fixed on the moving detector 10, and an optical system 13 consisting of lenses and the like is provided among end faces of optical fiber bundles and a yarn 6. The light-emitting optical fiber bundle 11 is wound round an optical fiber bundle winding wheel 16, and its other end is fast fixed on a shaft 17 of the winding wheel, while the light-receiving optical fiber bundle 12 is given a U-shaped turn by a pulley 18 provided on the opposite side end of the machine table to be wound round the winding wheel 16, and its other end is fast fixed on the shaft of the winding wheel. Besides, a light-emitter 19 and a light-receiver 20 are provided to face to end faces of optical fiber bundles fast fixed on the shaft of the winding wheel. |
