| 摘要 |
PURPOSE:To improve the ability of setting by widening the range of angles at which a pressure plate stops, by providing a friction plate to one rotating shaft of the pressure plate and a spring for adjustment to the other. CONSTITUTION:Pressure plate 30 is pivoted on rotating shafts 33 and 33' rotatably; fixed friction member 34 is fixed to bracket 29 of one shaft, and movable friction member 35 to the opposite bracket 31. Pressure spring 36, provided to the other bearing, moves in the long hole of bracket 29' to adjust frictional forces of members 34 and 35. On the friction surface of member 34, projection part 37 is formed and part of member 35 uses friction member 37'. In this constitution, pressure plate 30 can be stopped at a rondom angle and its operation angle can be widened. In complete closure, it meets a part other than projection part 37, and consequently the weight of the pressure plate is entirely used for setting, so that the ability of setting is improved. |
