Y-shaped Lumbers Can Be Used As Sledge for Transportation of Giant Tree Excavations At The Sakuramachi-Site in Oyabe City, Toyama, Japan
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概要
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The Y-shaped lumbers of the chestnut trees were excavated at the Sakuramachi-Site in Oyabe City, Toyama, Japan in 1997. Part of the present investigation has already been reported in the former surveys. There are a number of un-clarified points regarding use of the Y-shaped lumbers excavated at the Sakuramachi-Site. It is thought that the people of the Jomon period about 4000 years ago used the Y-shaped lumbers to transport heavy items such as giant trees. On the assumption that the Y-shaped lumbers can be used as sledges, the construction model of transportation of the giant trees using the Y-shaped lumbers is proposed in this paper. A 1/5 scale model of the Y-shaped lumbers was made, and the usefulness of the assumption and model for the transportation of giant trees was examined experimentally. As for the result, the usefulness of the hypothesis and model was verified. The positioning of Y-shaped lumbers in the history of tribology is also discussed in this paper. The Y-shaped lumbers of the Sakuramachi-Site were compared with both Shura excavated in Mitsuzuka Tumulus in Fujiidera City, Osaka Prefecture, fifth century Japan, and the sledge relief of murals in Ancient Egypt. It was confirmed that the Y-shaped lumbers of the Sakuramachi-Site are the oldest Shura in the world for the transportation of giant trees or stones under the assumption that the Y-shaped lumbers at the Sakuramachi-Site are Shura.
- 一般社団法人日本機械学会の論文
- 2006-12-08
著者
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Ozawa Yasumi
Department of Mechanical Engineering, Faculty of Engineering, Fukui University of Technology
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Ozawa Yasumi
Department Of Mechanical Engineering Fukui University Of Technology
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Ozawa Yasumi
Department Of Mechanical Engineering
関連論文
- History of Tribology in Ancient Northeast Asia - The Japanese Sledge and the Chinese Chariot -
- Y-shaped Lumbers Can Be Used As Sledge for Transportation of Giant Tree Excavations At The Sakuramachi-Site in Oyabe City, Toyama, Japan
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