| 摘要 |
PURPOSE:To prevent excessively large fluctuation of tension of strips in a treating tank using a simple device by compensating the fluctuation of tension caused by the movement of a loop car by the torque of a bridle roll provided between the loop car and the treating tank during the movement of the loop car. CONSTITUTION:A bridle roll 5 is provided between a loop car comprising a truck 3, fixed part 4, and wire, and a treating tank 6. A controlling device 12 of the tension in the treating tank synchronizes with the movement of the loop car and generates a signal 12a for compensating the movement of the loop car corresponding to the moving direction of the loop car and its speed. A controlling device 11 for motor inputs electric current 11a corresponding to a sum or difference added or subtracted to or from the current setting signal 11b by the loop car movement compensating signal 12a through a motor of the bridle roll 5. By this constitution, the tension of the strip 1 in the treating tank 6 is always held at a fixed value. |
