Manufacturing process of Japanese “Hatakanagu flag ornament based on human movement analysis
Ornament attached on the top of a flag, and called “Hatakanagu in Japanese, has been made by hand in Japan, traditionally. When the ornament has been made by hands, the skill of metal fitting essential for workers. Learning this skill is not easy for workers. Moreover, in the metal fitting handwork, it takes considerable amount of time. However, the skill and the process of the metal fitting have not been investigated in ergonomics. One kind of the ornament is triangular pyramid shape, and it is called “Sanpoken in Japanese, constructed by three triangular thin brass boards. Each brass board was attached with another by soldering. This soldering skill is fundamental for workers. The soldering movement has not been studied. Also, eye movement analysis is important, because workers may pay attention melted solder by heat. The purpose of this study is to investigate the manufacturing process of Japanese “Hatakanagu flag ornament, and the characteristics of human movement including eye movement in the process. One metal-Fittings-of-flag master of participated in this study. (Male 66years old of age, career of 50years). Moreover in this study, to analyze simply, the Sanpouken formed in triangular pyramid shape, constituted of triangle brass sheet was used. To acquire the position coordinates of the body, three-dimensional motion analysis system was used. In addition, one digital camcorder was connected to this system. To quantify eye movement; eye motion analysis system was used. The manufacturing process was divided into four stages consisted of eleven phases: (phase 1-3: preparation stages, phase 4-7: temporary assembly stage, phase 8-9: assembly stage, phase 10-11: post processing stage). Considering the above issue, when manufacturing the triangular pyramid shaped ornament, workers should not attach each brass board one by one. Better way is to attach the top of the brass board temporary, then to attach each side of the brass board, correctly. Furthermore when phase 9-1 edge soldering is analyzed still in detail, movements of a subject was divided into more 4 movements: (1.Soldering direction movement of Soldering-Iron, 2. Solder fusion movement, 3. Base material direction movement of Soldering-Iron, 4. Soldering movement) Characteristics of the movement were found in the manufacturing process, and the comparison of both eye and hand was found by comparing both displacements. Firstly, right hand moved, then viewpoint take over the position of the right hand. Finally, the position of the right hand became same as the viewpoint. Because the skilled worker normally memorized the position of the tools, so the movement was controlled, automatically. In addition, when the subject attached the brass boards by solder, he attended the seam of the brass boards, because of wetting and capillary phenomenon of solder. This movement might be advanced skill for workers.
Motion Analysis Soldering Metal Craft Flag Japanese tradition
Masaharu NISHINA Akihiko GOTO Yasuyuki YOSHIDA Masashi KUME Asami NAKAI Tetsuya YOSHIDA
Kyoto Institute of Technology Osaka Sangyo University Kyoto Institute of Technology, Future Applied Conventional Technology Center
国际会议
17th World Congress on Ergonomics(第十七届国际人类工效学大会)
北京
英文
1-6
2009-08-09（万方平台首次上网日期，不代表论文的发表时间）