共撚式縒掛け機構の技術特性とその変遷に関する技術史的研究

抄録

　　In order to realize technological history of the French type silk-reeling process in modern Japan, we carefully examined 68 academic documents and technical books for raw silk production which published from the Meiji era, the Taisho era to the Showa era. As a result of analyzing geometrical structure and technological parameters such as distance between hook and surface of reeling basin, distance between hooks, number of crossing, length of crossing, angle of getting uncrossed threads, it was found that transition of technique for the French type silk-reeling cross and process can be classified into three period: the European technology introduced period, the adaption period and the Japanese technology established period. Furthermore, we analyzed experimental data in “Tomoyori Souchi Shiken” published by Mr. Mitani to know influences of technological parameters on the quality and productivity of raw silk. We installed density of crossing as a new parameter to realize the phenomenon of the French type silk-reeling cross. As a result, it seems that the French type silk-reeling cross includes a complexity of geometrical structure and a nonlinearity of each technological parameters. This situation might have been difficult to optimize the process conditions in the era. It turned out that factors of the technological transitions were attributable to adaptation of Japanese silk mills to the introduced Western style technology, quality of raw material cocoon and changes of the global market structure and needs.