The purpose of this study is to investigate the symptoms or disorders, bone and muscle. Measurement and hand department employees trim welding plastic pallet, take a knife is a tool.And problems of ergonomics
.Data collection in the worker welds of pallets, plastic trim The company production of plastic, one of the 30 by questionnaire was developed. To collect personal information, the work.It was found that The prevalence rates of symptoms or disorders, bone and muscle. Evaluation of whole body maximum 3 first is the lower back (19.77%) the right shoulder (18.60%) and hand and his right wrist (16.28%), respectively. The evaluation of the hand and arm symptoms, the most common is the right wrist (58.06%) left wrist (12.90%) and middle right. (18.60%), respectively. The concept model of the knife. Application data from the hands and arms of workers with the recommended values of the Institute of occupational safety อนามัยและ of the United States, Canada. The same knife and is divided into 2 sections.To prevent and reduce injury acute and handle cross-sectional ellipse proportion according to the length of the handle of the fingers. The handle straight and curve. To prevent and reduce the cumulative injury that may occur with hands and arms of workers
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