電子組裝作業工作站設計之探討

The evaluation and design of electronic assembly workstation

陳雅娟(Ya-Juan Chen)

指導教授 ： 林久翔

中原大學/工學院/工業工程研究所/碩士(2001年)

https://doi.org/10.6840/cycu200100168

摘要

近年來電子業蓬勃發展，在電子業中除了自動化的機器之外，少不了的就是組裝工作站，而跟組裝工作站有直接關係就是操作員。在本研究中用來評估電子廠組裝工作站設計的指標就是操作員的疲勞度及績效，怎樣的設計才可將操作員的疲勞傷害降至最低並提高績效就是本研究的目的。
在組裝工作站中輸送帶扮演了很重要的角色，無論在半成品或成品的傳輸都需要輸送帶，而在組裝工作站中操作員須靠輸送帶傳遞半成品來加工，因此輸送帶的位置除了會影響操作員的績效之外，也會影響操作員的肢體疲勞度，另外，輸送帶的配置也必須考慮到裝配檯面的需求大小，而設置在正面或側面也是一個問題。目前，工廠輸送帶設置並無一定的準則，設置在操作員正面或側面都是因應工作需求或考慮機器的擺設，並沒有以操作員的主觀及肢體疲勞的客觀量測來決定，因此，本研究特地以操作員的肢體疲勞及績效為評估指標來探討輸送帶的設置位置與桌面深度的關係，並加上工件重量及操作頻率兩個因子，使其狀況更接近電子廠的組裝工作站。
本研究以操作者的主觀評量、肌電訊號均方根及中位頻率的平移、績效及離桌緣距離來評估輸送帶設置位置。分析結果顯示，作業避免將重複性高且重量重的作業結合，如果必須擇其一則寧願選擇重量重但工作頻率較低的作業，因為重複性高的作業比重量重的作業更容易造成肢體的疲勞。而在輸送帶的設置方面，設置在正面的輸送帶如果距離越遠則越容易造成肢體疲勞並降低績效，因此本研究從分析結果中發現若桌面深度到達95th percentile時，應採用設置在側面的輸送帶配置，因為95th percentile的桌面深度所造成的肢體疲勞比設置在側面的輸送帶來的高，且績效也較側面的低。因此，當工廠的組裝工作檯面深度到達48cm時，應採用設置在側面的輸送帶配置。

關鍵字：輸送帶、工件重量、工件頻率、肌電訊號

關鍵字

輸送帶 ； 工件重量 ； 工件頻率 ； 肌電訊號

並列摘要

The electronic industry has developed vigorously recently. Both fully automatic machines and human assembly lines are used in electronic industry. There is a human machine relationship between operators and the assembly workstations. In this study, the operators’ muscular fatigue and task performance were used to evaluate the design of the electronic assembly workstation, aiming at coming up with ergonomic recommendations for the design of the electronic workstation.
The conveyor plays an important role in assembly workstations, either transporting finish goods or semi-finish goods. Operators in assembly workstations may reach their arms to the conveyor for semi-finish goods for further assembly. The reach distance of the conveyor may affect operators’ fatigue and performance. Additionally, the distance between the conveyor and the operator is affected by the size of the workbench. Two positions are usually considered in arranging the relative position of the operator to the conveyor, either locating the operator directly in front of the conveyor or locating the operator at the side of the conveyor. There is no specific rule for choosing the front or lateral position in locating the operator with respect to the conveyor. Most considerations are dependent on the task demand or machine layout, but not on the operator capacity. Therefore, this study focuses on operators’ fatigue and performance to evaluate the relationship between the position of the conveyor and the workbench depth. Frequency of operation and work piece weight are two additional factors considered in the experiment. The simulated experimental task is performed as close as possible to that in the electronics assembly workstation.
The dependent variables are the subjective measure, the EMG root mean square, mean power frequency, task performance, and the distance from the subject to the workbench. The result shows that high frequency tasks have a greater impact on the operator fatigue than heavy tasks. As for the position of the conveyor, the fatigue level increases and performance reduces with the increase of the workbench depth when the conveyor is in front of the operator. This study also found that when the workbench depth reaches 95th percentile of the arm reach value, it is better to locate the conveyor laterally to the subject, because the longer workbench depth in the front will cause higher fatigue and lower performance than the lateral position.

Keyword: conveyor, position, frequency, work piece weight, EMG

並列關鍵字

EMG ； conveyor ； work piece weight ； frequency ； position

參考文獻

馮兆康，黃建財, 1999, 護理人員背部及腿部及肩部肌肉骨骼傷害之相關因子研究, 中華職業醫學雜誌, 6(4), 249-260

勞工安全衛生研究所, 2000, 電腦工作桌椅尺寸建議值, http://iosh.cla.gov.tw/data/f12/e7.htm

Armstrong, T. J., Foulke, J. A., Joseph, B. S. and Goldstein, S. A., 1982, Investigation of cumulative trauma disorders in a poultry processing plant, Am Ind Hyg Assoc J, 43, 103-116

AT&T Bell Laboratories, 1983, Video display terminal. Short Hills, NJ

Ayoub, M.M., 1973; Work place design and posture, Human Factors, 15, 265-268