| 摘要 |
PURPOSE:To improve the working efficiency for centering in the longitudinal direction of steel plates which are placed horizontally in facing each other, by detecting the deviation between the longitudinal edges of the steel plate by making use of the transverse movement of a shearing mechanism at the intermediate of the end edges of the steel plates and moving one of the steel plates in the width direction in accordance with said deviation. CONSTITUTION:A light source 3 is mounted to the center at the right end of a lower knife holder 19B of a shearing mechanism 2 and photoelectric elements 4, 5 are mounted on both sides at the right end of an upper knife holder 19A. When the mechanism 2 moves in a direction P within the transverse direction ZZ of the plate, the elements 4, 5 detect the point a2 on the longitudinal edge l1 of a steel plate W1 and the point a1 on the longitudinal edge l2 of a steel plate W2 and record the coordinates from a reference position 24. When the shearing device 2 arrives at the prescribed positions on the plates W1, W2 similarly, the elements detect the point b2 on the other longitudinal edge m1 of the plates W1, W2 and the point b1 on the longitudinal edge m2 and record the coordinates from the position 24. The deviation C between the central axes in the longitudinal direction of the plates W1, W2 is calculated in accordance with the coordinate value and holding members 13A, 13B for the steel plates on one side are moved in the ZZ direction relatively with other support members 14A, 14B for the steel plates so as to make the deviation C to zero, whereby the plates W1, W2 are centered. |
