| 摘要 |
<p>PURPOSE:To make it possible to detect the tensile force of a tape having high responsive frequency, by supporting a roller base to which a rotary roller having a tape turned therearound is attached in a freely rotatable manner by a parallel leaf spring. CONSTITUTION:A rotary roller 1 receives force in the direction of arrow (a) by the tensile force of a tape running around said roller 1 and two parallel leaf springs 8 are sagged in this state to be moved to the same direction (a). At this time, a roller base 2 is moved while held under an accurately parallel state with respect to a base 4. The moving amount of the roller base 2 or the sagging amount of each leaf spring 8 is proportional to the tensile force of the tape and converted to an electric signal by a magnetical displacement sensor consisting of a coil 18 wound around an U-shaped core 6 and a core 7. The tensile force of the tape is detected in accordance with the degree of the tensile force of the tape during running.</p> |
