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  1. C100 医学部/医学系研究科
  2. C100b 紀要
  3. Nagoya journal of medical science
  4. 57(suppl)

TECHNICAL PREVENTIVE MEASURES IN JAPAN

https://doi.org/10.18999/nagjms.57.suppl.219
https://doi.org/10.18999/nagjms.57.suppl.219
5b60ee6d-0d7d-486a-bc12-ddda39ec1c2a
名前 / ファイル ライセンス アクション
v57supp219_228.pdf v57supp219_228.pdf (515.1 kB)
Item type 紀要論文 / Departmental Bulletin Paper(1)
公開日 2012-03-06
タイトル
タイトル TECHNICAL PREVENTIVE MEASURES IN JAPAN
著者 YONEKAWA, YOSHIHARU

× YONEKAWA, YOSHIHARU

WEKO 98938

YONEKAWA, YOSHIHARU

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キーワード
主題Scheme Other
主題 Technical improvement
キーワード
主題Scheme Other
主題 Preventive measure
キーワード
主題Scheme Other
主題 Vibration
キーワード
主題Scheme Other
主題 Hand-held tool
抄録
内容記述 Technical preventive measures against vibration syndrome in the field of industrial health are reviewed in the present paper. The first technical prevention measure is to reduce vibration transmission from the tools to the operators. This measure employs vibration isolators between the handles and vibration sources of machine tools. Handles of tools using Neidhalt dampers, shear type rubber mounts and springs have reduced frequency-weighted acceleration levels (Lh,w) from 2 dB to 10 dB (Lh,w (dB)=20 log a/ao; a: frequency-weighted acceleration (rms), ao = 10^-5 m/s^2 ) in Z direction, while no reduction was found in X, Y directions. The second measure is to reduce vibration at the source; New chain saws have been developed to reduce vibration with twin cylinder instead of a single cylinder engines. This cancels unbalanced movements inside the internal combustion engine. Such chain saws reduced Lh,w values more than 10 dB in both front and rear handles except in Z direction of the front handle. A new type of impact wrench has been devised with an oil pulse device to avoid direct metal contact inside the power source. This new impact wrench lowered Lh,w values more than 10 dB in three directions. The third measure is to use a remote control system or to substitute another machine generating less vibration. Vibration reduction at the handle lever of the remote control chain saw was more than 20 dB. A more effective means is to substitute other machines for conventional tools: a hydraulic wheel jumbo instead of a leg-type rock drill; a hydraulic breaker instead of a hand-held breaker. However, these heavy machines produce whole-body vibration which might give rise to other problems such as back pain.
内容記述タイプ Abstract
出版者
出版者 Nagoya University School of Medicine
言語
言語 eng
資源タイプ
資源 http://purl.org/coar/resource_type/c_6501
タイプ departmental bulletin paper
ID登録
ID登録 10.18999/nagjms.57.suppl.219
ID登録タイプ JaLC
関連情報
関連タイプ isVersionOf
識別子タイプ URI
関連識別子 http://www.med.nagoya-u.ac.jp/medlib/nagoya_j_med_sci/57suppl/57suppl.html
ISSN(print)
収録物識別子タイプ ISSN
収録物識別子 0027-7622
ISSN(Online)
収録物識別子タイプ ISSN
収録物識別子 2186-3326
書誌情報 Nagoya Journal of Medical Science

巻 57, 号 suppl, p. 219-228, 発行日 1994-05
著者版フラグ
値 publisher
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