BLADE ROOT FORMING PIECE FOR WIND TURBINE BLADE, BLADE ROOT STRUCTURE FOR WIND TURBINE BLADE USING THE SAME, WIND TURBINE BLADE, WIND TURBINE AND METHOD FOR PRODUCING WIND TURBINE BLADE

摘要

PROBLEM TO BE SOLVED: To provide a blade root forming piece for a wind turbine blade, reducing plate thickness and weight of a blade root part without perforating the blade root part or lowering the fixing strength of the blade root part and a hub, a blade root structure of the wind turbine blade using the blade root forming piece, the wind turbine blade, a wind turbine, and a method for producing the wind turbine blade.SOLUTION: A blade root forming piece 10 includes: embedded metal 12 provided with a nut 12A having a hole with a threaded female screw 13 and a protrusion 12B that protrudes in the circumferential direction of a blade root from the nut 12A; a core material 14 provided adjacent to the protrusion 12B on the blade apex side of a wind turbine blade; and an FRP-wound layer 16 formed by winding and laminating a unidirectional fiber prepreg around the protrusion 12B and the core material 14, and by hardening the unidirectional fiber prepreg.