거중기의 설계와 작동방식에 대한 고찰 = A Study on the Design and Mechanism of ‘Geojunggi’

다국어 초록 (Multilingual Abstract)

The Geojunggi, developed by Jeong Yak-yong of the Joseon Dynasty in 18th century, is a mechanical device for lifting heavy stones using the principle of a pulley. It was used in the construction of Hwaseong Fortress (UNESCO Heritage) in Suwon, and its form and principle are explained in the Geo-jung-do-jeol and Hwa-seong-seong-yeog-uigwe. However, since the contents of the description and drawings are not clear, it is difficult to implement them as actual machine. This is because it cannot be made with only simple mechanisms due to the complexity and stability of heavy equipment. In this study, the precise operation method and design principle were analyzed in an engineering manner based on the exploded view and assembly drawing of the crane. Also, based on the research results, a dynamics simulation was performed, and through this, the actual operating conditions were verified.