The present invention relates to a roller (Roller) for guiding the steel sheet rolled in the hot rolling process to the down coiler (Down Coiler) side, and more specifically to the lower cooling ability of the steel sheet to be guided to run to ensure the lower cooling space The present invention relates to a copper roller of a hot rolled line which can improve the quality of the steel sheet by improving the quality of the steel sheet.;The present invention is recessed and formed on the lower side of the pedestal 123 for supporting both ends of the roller member 121, the receiving portion 10 having a locking jaw (11) that the pedestal 123 is caught; and the pedestal ( The upper end is connected to the lower surface of the 123, and the upper and lower pistons 23, 24 are assembled so that the cylinder rod 21 and the cylinder rod 21 installed on the outer circumferential surface can be moved in the inner hole 26. And a hydraulic cylinder 20 having a cylindrical casing 22 having a cover 25 and installed on the bottom surface of the receiving portion 10, and connected to a lower end of the inner hole 26, and having a check valve ( A hydraulic pipe 30 having a 31; and an air pipe 40 connected to an upper end of the inner hole 25 and having an air valve 41; and operating the cylinder rod 21 up and down. A hydraulic motor 50 connected to the hydraulic pipe 30; and the appropriate number of roller members 121 capable of supporting the load of the steel plate 2 and their positions to calculate the position of the hydraulic motor 50. It provides a vertical movable roller in the rolling line including; process control converter for controlling the drive.
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