engleski

Human Vibration Transmitted to the Framesaw Operator

The paper reports and analyses the results of vibration measurement carried out on a framesaw. Vibrations were measured on both the left and the right handle as well as on the operators seat acording to ISO 8662-8. The measured levels of the weighted accelerations of the vibration were compared to the daily exposure limits according to ISO 5349-1 and ISO 2631-1. Daily exposures were determined according to the same standards. There are more than forty framesaws at the moment in use in Croatia in use in Croatia and many framesaw operators have serious hands and spine problems. The complex measurements were carried out in order to find out the vibration level at the operators working area. The paper reports the measurement results of the vibration transmitted to the framesaw operator during an ordinary working day. Vibration was measured at all operations performd during the normal framesaw working cycle. The weighted r.m.s. acceleration was also calculated and the duration of the each single framesaw operation was measured. The energy-equivalent vibration level corresponding to the total duration of exposure was calculated, too. The measurement results showed that the framesaw operator, under the given measuring conditions, is exposed to a vibration level higher than recomended daily exposure limits. Also, the energy-equivalent vibration level is higher than the recommended limits.

Ergonomics; Health risk; Hand-arm vibration; Whole-body vibration; Exposure limits

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