Bulletin of Takenaka Carpentry Tools Museum
Online ISSN : 2436-1453
Print ISSN : 0915-3685
Volume 1
Showing 1-2 articles out of 2 articles from the selected issue
  • Kinya Hoshino, Kazuo Hirasawa, Akira Watanabe, Yasumi Tsuchiya
    1989 Volume 1 Pages 1-13
    Published: 1989
    Released: December 01, 2021
    RESEARCH REPORT / TECHNICAL REPORT OPEN ACCESS
    The authors carried out the experimental making of a reproduction of the saw which was excavated from the ruins of “KUSADOSENGENCHO” -in FUKUYAMA city, and made a  study of its function in practical use. Results were as follows. 1) This type of saw seems to be suitable rather for cross -cutting than for rip- sawing, good performance was observed at the middle part of the blade in comparison with the other parts. 2) Unexpectedly, it shows very little function on the tip of the blade, with both pushing and pulling action, especially on rip -sawing. 3) Generally speaking, this type of the saw was probably used for mainly cross-cutting, using two-thirds of the blade from the root, and the tip of the blade seems to have been used for minor short stroke work. 4) It is recognized that ab lade thickness of 1.Im m or more is required in order to obtain a strength for a buckling load. 5) The optimum size of wooden handle for this saw seems to be 22mm on a minor axis and 28mm on a major axis with oval section, and 200mm in length.
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  • Hiroshi Okimoto
    1989 Volume 1 Pages 14-29
    Published: 1989
    Released: December 01, 2021
    RESEARCH REPORT / TECHNICAL REPORT OPEN ACCESS
    Waterstones are used in Jap an to sharpen the edges of plane and chisel blades, as well as all cutting edges. Maintaining the sharpest edge on his blade tools is a constant part of a carpenter's work and one that demands a great deal of his time. The quality of his blade directly determines the quality of his work as well as the efficiency with which he works. Knowledge itself is not sufficient to produce a finely shaprened blade, however. Experience and skill are also necessaη人The purpose of this study was to obtain information about the effectiveness of waterstones for sharpening steel blades from a scientific point of view The properties of two steel blades and seven types of waterstones were measured and the results presented in this paper. It was found that there was a direct correspondence between the roughness of the waterstone and the fineness of the cutting edge of the steel blade. Although this conclusion may seem obvious to any carpenter, the precise physical properties involved were indicated by the experiments for the first time. However. it will be necessary to carry out further experiments to determine the mechanical and chemical properties of waterstones and steel blades to reach definitive conclusions.
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