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Investigation of oil palm harvesting tools design and technique on work-related musculoskeletal disorders of the upper body

journal contribution
posted on 20.10.2021, 08:57 by S Mohamaddan, MA Rahman, M Andrew_Munot, SJ Tanjong, BM Deros, SZ Md Dawal, Keith CaseKeith Case
The oil palm industry is one of the important sectors in Malaysia. The growth and development of this industry shows that Malaysia is the world second-largest oil palm producers. However, in the fresh fruit bunch (FFB) harvesting process, the harvesters are exposed to many types of work-related musculoskeletal disorders (WMSDs). The FFB harvesters tend to develop WMSDs especially the shoulders and trunk. Hence, it is important to identify the exposure levels, awkward postures and the reaction forces of muscle activity based on the posture and movement of the harvesters when using pole, chisel and loading spike during the harvesting process. The objective of this study was to investigate the effect of the design of oil palm FFB harvesting tools on WMSDs of the upper body. Rapid Upper Limb Analysis (RULA) was used to investigate and assess the exposure level on the harvester body during the harvesting process. The assessment showed that the shoulders and trunk have high exposure level and undergo awkward posture. Human Musculoskeletal Model Analysis (HMMA) was used to identify the reaction force exerted on the muscle during the FFB harvesting process. In this study, 4 muscles were analysed including Triceps, Biceps, Erector Spinae and Psoas Major. The highest reaction force of 16.36 N was found on the left triceps when handling a loading spike. In conclusion, it is important to address the risks by reviewing all possible aspects that contribute to the WMSDs and interventions on the tool design, task and working shifts may be required.

Funding

UNIMAS MyRA Special Grant Schemes [Grant no: F02/SpSTG/1385/16/27]

History

School

  • Mechanical, Electrical and Manufacturing Engineering

Published in

International Journal of Industrial Ergonomics

Volume

86

Publisher

Elsevier BV

Version

AM (Accepted Manuscript)

Rights holder

© Elsevier

Publisher statement

This paper was accepted for publication in the journal International Journal of Industrial Ergonomics and the definitive published version is available at https://doi.org/10.1016/j.ergon.2021.103226.

Acceptance date

28/09/2021

Publication date

2021-10-09

Copyright date

2021

ISSN

0169-8141

Language

en

Depositor

Prof Keith Case. Deposit date: 19 October 2021

Article number

103226