| 摘要 |
<p>PURPOSE:To fix the relative position of an elastic supporting means and a position detecting means definitely and to enhance the tape tension detection accuracy by disposing the elastic supporting means of a tension detecting arm and the position detecting means to the same mobile member. CONSTITUTION:A Hall sensor unit (composed of a Hall sensor 74, a Hall sensor board 66, a Hall sensor base 65) is arranged on the same member as a loading plate 63 provided with a leaf spring 68. As the adjusting method of the unit, the reference position of a tension detecting arm 70 is set, the base 65 is adjusted finely so as to match the position and fixed on the plate 63 by a screw. Then a spring plate 69 is adjusted to as to attain the reference tension at the reference position of an arm 70 and screwed to the plate 63. The plate 63 is moved at loading and unloading by a loading lever 60. Thus, even when the stopping positions of the plate 63 are dispersed, the correct tape tension at that time is detected by a sensor 74.</p> |
