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• Career Education of the University Students

• Human Error in Wood Working.

• Sensory Evaluation of Wood-Based Materials.

• Corrosive Wear of Woodcutting Tools.

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• 木材切削工具の腐食摩耗特性に関する研究

  2006.09

Published Papers 【 display / non-display 】

Published Papers 【 display / non-display 】

• Examination of Sawing Motions by Three-dimensional Analysis - Changes in the angle of worker's shoulders and elbows, handsaw blade movement distance and speed

  Hideaki FUKUDA,Yutatsu KINJO

    99   1 - 8   2021.09

  Type of publication: Research paper (bulletin of university, research institution)

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  The shoulder angle and elbow angle that are displaced during sawing work, and the movement distance and the speed of handsaw blade were investigated, and verified the movements of the high-precision and low-precision university students. Students cut two types of wood with different thicknesses using a handsaw and photographed the work with two CCD cameras. The angle and distance of each part of the body were analyzed by motion capture using 3D coordinate measurement software. As a result, in the case of sawing wood A (thickness 11 mm), there was no statistically significant difference between the upper group and the lower group in the maximum and minimum angles of the shoulders. But there was a significant difference between the maximum and minimum elbow angles. In the case of sawing wood B (thickness 31 mm), there was no significant difference between the upper and lower groups in the maximum and minimum shoulder angles. However, there was a large significant difference between the maximum and minimum elbow angles. Focusing on the movement of the elbow, it was found that moving the arm back and forth around an elbow angle about 90 degree is one index for improving processing accuracy. When cutting wood A, the maximum movement distance of the handsaw blade was significantly different between the upper group and the lower group, but no significant difference was observed when cutting wood B. Beginners often mistakenly recognize that increasing the stroke speed over a short range of handsaw blades allows for faster and more accurate cutting. Beginners need guidance in sawing with the entire length of the handsaw blade. There was no significant difference in the maximum movement speed of the handsaw blade between the upper group and the lower group. It is necessary for beginners to specifically teach the appropriate cutting movement distance and cutting speed for sawing.

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• An Introduction Program of Manufacturing in Compulsory Education Teacher Training Course

    95   65 - 85   2019.09

  Type of publication: Research paper (bulletin of university, research institution)

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• The Activities of Handmade Paper Making Study for Elementary School and Children in a Regional Community in Okinawa

    23   1 - 17   2016.03

  Type of publication: Research paper (bulletin of university, research institution)

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• A Preliminary Survey of the Cultivation of Wikstroemia Retusas in School

    88   77 - 81   2016.02

  Type of publication: Research paper (bulletin of university, research institution)

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• Characteristics of Corrosive Wear of Coated High-Speed Steel Tools

  Banshoya　Kaoru,Murase　Yasuhide

  No.64 (2004/2) ( 琉球大学教育学部 )  ( 64 ) 207 - 219   2007.07

  Type of publication: Research paper (bulletin of university, research institution)

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  To clarify the characteristics of corrosive wear of coated high-speed steel tools in high moisture-content Douglas-fir (Psuedotsuga menziesii Franco) cutting, tool-life tests were conducted with a whirling disc-machine. Three kinds of coated tools and uncoated tools were prepared. Both rake faces and clearance faces of the tools were coated with either TiN, TiCN, or CrN by physical vapor deposition (PVD) method. The thickness of thin-film for each coated tool was 2-3 μm. In the tool-life tests, electrical-potential of +1 kV, 0 V, or ?1 kV was applied to the tool by use of a direct-current power supply. From scanning electron microscope observations conducted after the tool-life tests, delamination of thin-film for each coated tool was viewed. The degree of delamination was the largest under +1 kV, and the smallest under ?1 kV. Among measurements of tool wear, edge recession under 0 V for CrN-coated tools was the smallest among all of the tools. The CrN-coated tool was superior to the other tools in reducing the progression of edge recession. The differences in edge recession under ?1 kV for the three kinds of coated tools were not detectable. The tool-wear progression under +1 kV for all tools occurred quickly. By regarding edge recession at ?1 kV as being caused by a mechanical wear mechanism, the ratio of corrosive wear to the total edge recession under 0 V could be obtained. The value for uncoated tools was 55% and was the largest. The value for CrN-coated tools was 43% and was the smallest. （管理者追加）リポジトリ登録情報を移行しました。確認のうえ、加除修正をしてください。

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• Grant-in-Aid for Scientific Research(C)

  Project Year: 2009.04  -  2012.03 

  Direct: 500,000 (YEN)  Overheads: 150,000 (YEN)  Total: 650,000 (YEN)

• Grant-in-Aid for Scientific Research(C)

  Project Year: 2007.04  -  2009.03 

  Direct: 500,000 (YEN)  Overheads: 150,000 (YEN)  Total: 650,000 (YEN)

• Grant-in-Aid for Scientific Research(C)

  Project Year: 2005.04  -  2007.03 

  Direct: 2,500,000 (YEN)  Total: 2,500,000 (YEN)

Preferred joint research theme 【 display / non-display 】

Preferred joint research theme 【 display / non-display 】

• Effect of Wood Environment in Schools

  Archtectural Environment / Equipment

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  Wood Environment

• Human Error Analysis of School Education

  Science Education

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  Human Error

• Curriculum Organization of Technology Education

  Subject Pedagogy

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  Technology Education

• Examination of School Furniture, Desks and Chairs

  Archtectural Environment / Equipment

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  Desks and Chairs

• Corrosive Wear of Woodcutting Tools

  Timber Production Science / Wood Engineering

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  Woodcutting Tools

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