2021 Fiscal Year Final Research Report
Study on suppression measures of hand-arm vibration caused by frictional vibration in electric power tools
| Project/Area Number |
19K04275
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 20010:Mechanics and mechatronics-related
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| Research Institution | University of Miyazaki |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
近藤 孝広 九州大学, 工学研究院, 教授 (80136522)
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| Project Period (FY) |
2019-04-01 – 2022-03-31
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| Keywords | 振動制御 / 自励振動 / 動吸振器 / 摩擦振動 / 手腕振動 / 日振動ばく露量 |
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| Outline of Final Research Achievements |
In this study, we aim to elucidate the occurrence mechanism of vibration in electric power tools: disc grinders and electric sanders and so on, and to develop a new technique for suppression of hand-arm vibration. The experiment for measuring the daily vibration exposure values was conducted to investigate the causes of vibration. The results clarified that the main cause increased the daily vibration exposure value is frictional vibration caused by contact between tools and work materials. In order to suppress the frictional vibration in disk grinder, an anti-vibration handle with a built-in dynamic absorber was developed. It was proven confirmed that the dynamic absorber is very effective to reduce the daily vibration exposure value. In addition, it was confirmed that the dynamic absorber is also effective for vibration in sander.
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| Free Research Field |
機械力学
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| Academic Significance and Societal Importance of the Research Achievements |
手腕振動の問題を抜本的に解決するためには，その主要因である手腕振動を抑えるために工具の改良に取り組むことが極めて重要である．そのためには，工具の種類によって異なる振動の発生メカニズムを解明し，人体への振動伝播を根絶するための最良の方法を見極め，それを具現化する新しい機械技術を開発しなければならない．本研究によって機械工具に対する新しい振動抑制技術が確立されたことは，手腕振動障害の根絶のための一歩と
なり，その意義は学術と実用の両面で非常に高いと考えている．
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