Cooling method of carrying section and carrier

A cooling method of carrying section for cooling a carrying conveyor by a cooling mechanism, the method comprising the carrying conveyor configured to convey a workpiece, a heating furnace configured to cover a part of the conveyor and heat the workpiece, and the cooling mechanism for cooling the conveyor, wherein

• the carrying conveyor for conveying the workpiece includes a carrying roller that will contact with the workpiece and convey the workpiece;
• a roller cooling member is provided as the cooling mechanism, the roller cooling member being configured to surround an outer periphery of the carrying roller and include an opening through which a part of the outer periphery of the carrying roller protrudes;
• the carrying roller heated by heat of the heating furnace is cooled by the roller cooling member,
• the roller cooling member internally holds a cooling pipe formed along a circular arc of the carrying roller, the pipe being configured to internally circulate a cooling medium:
• the roller cooling member includes a plurality of plate members;
• and
• the plate members are arranged, interposing the cooling pipe therebetween, in parallel with a direction of conveying the workpiece.