Speed control apparatus for equipment for continuous processing of steel plates

In a speed control apparatus for controlling feeding or delivering speed of a steel plate in continuous processing equipment for steel plates having a central processing unit for giving predetermined processing to an endless steel plate continuously supplied thereto and a looper provided on the steel plate feed side of the central processing unit or the steel plate delivery side thereof for sending the continuous steel plate into the central processing unit or taking the same out thereof, said looper including movable rollers, said speed control apparatus for continuous processing equipment of steel plates comprising:

• entrance-side speed detecting means for detecting steel plate transporting speed on the entrance side of said looper;
• exit-side speed detecting means for detecting steel plate transporting speed on the exit side of said looper;
• looper position detecting means for detecting a position of said movable rollers;
• optimum speed differential calculating means for calculating optimum speed differential between the entrance-side speed and the exit-side speed of said looper from a relative speed differential based on the results of detection by said three detecting means in order that said movable rollers may be regulated, according to the detected results by said detecting means, to take the optimum position where the entrance-side speed is synchronized with the exit-side speed of said looper;
• and
• entrance-side speed calculating means for calculating optimum speed on the entrance side of said looper from the result of calculation by said optimum speed differential calculating means and the result of detection by said exit-side speed detecting means.