An Ergonomic Evaluation of Thread Rolls Handling Operation in Traditional Textile Factory

• Main Authors: Ching Chang, 張倞
• Other Authors: Chih-Wei Lu
• Format: Others
• Language: zh-TW
• Published: 2018
• Online Access: http://ndltd.ncl.edu.tw/handle/h933a4

碩士 === 中原大學 === 工業與系統工程研究所 === 106 === With the development of economy, manual human work is gradually replaced by automation. Nowadays, factories have been using automated systems in their production lines. Despite the use of automated system, many Taiwanese enterprises still depend on manual work due to limited space, cost, and product features. According to the second paragraph of Article 6 of the Occupational Health and Safety Law of our country, employers should properly plan and take necessary safety and health measures to the workers, prevent musculoskeletal injuries that may be caused by repetitive operations, and provide appropriate shift system and working hours. The KIM-LHC checklist was used to evaluate the handling of the thread rolls in the traditional textile factory. The results showed that the operation was at the third level of risk value, medium and high load operation, and it is recommended to improve the operation. Since most of the facilities in traditional textile factories are designed to match the machine tools and production lines, each large-scale machine, material shelf cart, and transport cart are special specifications, and are not considered from the perspective of personnel. This study will explore the relationship between the height of the material shelf and the height of the cart when carrying the thread rolls to the shelf, and propose the working height combination that best suits the personnel. This study will conduct an experimental evaluation by simulating the handling of the shelfing operations, and compare the operation of the workers at different heights. The simulation will use the original shelf height (50 cm, 110 cm, and 170 cm) and the cart. Height (50 cm), and additionally proposed two other hypothetical cart heights (75 cm, 100 cm) to explore the relationship between the height of different material shelfs and the height of different carts for the physiological changes in the subject''s working. A total of 10 male subjects were enrolled in the experiment. The Borg-10 and an electromyography amplifier were used to collect the upper trapezius, biceps muscle changes and RPE of the subject during the operation. The experimental results show that the index of RPE has a significant P value of 0.000 for the height of the material shelf and the height of the cart. The upper trapezius muscle %MVC and the biceps %MVC only have a significant material shelf height P value of 0.000 and 0.001, respectively. After ANOVA is completed, the working height of the most suitable operator will be obtained by means of ANOM. Finally, the results of this study show that the height of the material frame is 110 cm and the height of the cart is 100 cm, which is the most suitable combination of the height of the work. It reduces the unnecessary high handing and low bending postures of the operator and reduces the occupational musculoskeletal injury occurring.