Cooling device and cooling method for hot strip

The present invention provides a hot-rolled steel strip cooling apparatus and cooling method, when the strip with the cooling water after the hot rolling, by appropriately high cooling capacity and a stable cooling area can be carried out from the front end to the end of the strip uniform cooling. (1) on the surface of the steel strip (12) side, oppositely disposed with respect to the circular tube nozzle moving direction of the strip (12) are inclined toward the downstream side and the upstream side of the rod-like cooling water (14). (2) on the surface of the steel strip (12) side, is disposed opposite the ejection rod-like flows from the upstream side and the downstream side roller (9), respectively, to just above the inclined roller round nozzles (14) . (3) lower surface side of the strip (12) is disposed lower surface cooling nozzle (19) surface between the cooling water is sprayed from the roller to the strip, and, on the surface of the steel strip (12) side, opposite respectively arranged laterally of the injection position right above the inclined cooling nozzle like flow (14) upstream and downstream from the lower surface cooling nozzle (19) cooling water spray impact strip (12) position.