MANUFACTURING APPARATUS FOR HOT-ROLLED STEEL PLATE AND MANUFACTURING METHOD FOR STEEL PLATE

The present invention provide, in a production line of the hot-rolled steel sheet: a manufacturing apparatus of a hot-rolled steel sheet, and a manufacturing method of a steel sheet, which are excellent in discharging water. The manufacturing apparatus of a hot-rolled steel sheet comprises a final stand, and a cooling apparatus, wherein the final stand comprises a pair of standing side members in a housing of the final stand; the cooling apparatus comprises a plurality of rows of upper surface cooling nozzles which are configured to spray cooling water over an upper surface of the steel sheet, and which are arranged along a transporting direction of the steel sheet; comprises a plurality of rows of lower surface cooling nozzles which are configured to spray cooling water over a lower surface of the steel sheet, and which are arranged along a transporting direction; and comprises an upper surface guide on the upper surface side of the steel sheet; an end portion of the cooling apparatus on a side of the final stand is arranged between the standing side members of the housing; and when defining a width of a uniformly cooled region as W; defining an average gap distance between the end portion of the width of the uniformly cooled region and the standing side member of the housing as W sw ; defining a gravity acceleration rate as g; defining an average water volume density of the width of the uniformly cooled region as Qq; and defining a value determined by W sw and an average distance h between the upper surface guide and the upper surface of the steel sheet as C, a specific relation is satisfied.