PURPOSE: To simplify the coil inspection apparatus, to contrive the fast feedback, and to increase the production, by sequentially arranging the first coiler, the second coiler, and the coil inspection apparatus, in the pass line on the exit side of the rolling mill.
CONSTITUTION: The strip is rolled by two mill groups under new rolling conditions; after finishing the coiling work by the second coiler 7, the motor 8 is reversely turned round for a short while in order to uncoil the strip 16 from the coil 17 onto the inspection table 12 where the surface condition of the strip 16 is inspected. After the inspection is finished, the strip 16 is again coiled by the coiler 7, and the approved coil is transmitted by the coil car 10 on the conveyer 13. During this period, the successively rolled strip is treated by the first coiler 5. Since the inspection is not necessary for all coils, the ordinary rolling work can be performed with two coilers. Accordingly, the increase of production, the suitability of the inspection, the fast feedback, and the low installation cost, etc., can be contrived as compared with the conventional method.