圓柱式與跨距式握力資料庫及其工作規範參考值的建立

The Development of Database and Work Recommendation Guidelines on Cylindrical and Linear Grip Strength

本研究目的在建立一套本㈯勞工握力的資料庫，以及建立30 分鐘的工作規範。本研究採三因子實驗設計：握把型式、握把直徑（跨距）和手腕姿勢。握把型式包含圓柱式及跨距式二種。握把直徑（跨距）設定為3、5 及7cm 三階。腕部姿勢亦為三階，分別為屈曲30°、中性與伸展30°。本研究共量測300 名勞工，每名包含18 項握力。握力資料庫結果顯示，國人的握力約為白種人握力的70 至100%。工作規範在於建立容許施力與工作頻率的關係。此工作規範是依據prEN 1005-3 工作規範草案所建立的，同時將之擴充為包含AL 和MPL 兩個暴露極限值。AL 及MPL 是在300 名勞工中分別挑選出7 名的受測者來進行工作規範的測試，依序在1 和5 次/分兩個的工作頻率下，求取30 分鐘工作時程的容許施力值。工作規範結果顯示，AL 與prEN 的規範相當一致，然而MPL 則高於prEN 的規範甚多。

The purposes of this study are to establish an indigenous hand grip strength database, and to develop work recommendation guidelines. The database is a three factorial design on grip type, diameter (or gap) and wrist posture. The grip type consists of two levels: linear and cylindrical. The diameter (or gap) consists of three levels: 3, 5 and 7cm. And the wrist posture also consists of 3 levels: 30°flexion, neutral and 30°extension. Three hundred workers were recruited as subjects. The resultant database consists of 300 entries, each with 18 items of grip forces. The indigenous grip strength is approximately between 70 and 100% of Caucasians. The work recommendations are to establish the relationships between allowable forces and work frequencies. The work recommendations are based on the prEN method, and further expended to consist of an AL and a MPL dual exposure limits. Among the 300 workers, 7 were selected as subjects for the Al and 7 for the MPL. Two work frequencies, 1 and 5/min., were chosen as the work frequencies to be investigated. For the two work frequencies, repetitive trials were performed to determine maximal allowable forces, which can be maintained for 30 minutes. The results show that the AL is in good agreement with the prEN recommendation, however the MPL is much higher.