Effects of Processing Time and Years of Experience on Pre-Bending Process for Bamboo Beam in Kyo-Chouchin (Japanese Lantern) Making Process

Japanese lantern that is made and used in Kyoto is called “Kyo-Chouchin”, which is one of traditional crafts in Kyoto. Kyo-Chouchin is made by craftsman one by one and made of bamboo framework and Japanese paper. In fabricating process, there is “Hone-tame” process that craftsman applies load to a bunch of bamboo circles. In this study, in order to investigate the influence of Hone-tame process to bamboo properties, mechanical test and form measurement of bamboo were performed. Specimens treated in Hone-tame process different amount of time were prepared. As a result, the Hone-tame process has effects which tensile strength of bamboo beam is evened up and bamboo hoop become true circle.