Ergonomics Analysis of Rice Combine Harvester

Mini rice combined harvester is currently being operated in paddy fields. This study aims to determine the ergonomics of mini rice combine harvester machine in harvesting rice on narrow paddy fields. Ergonomics analysis was carried out based on the mechanical characteristics of the machine and the physiological characteristics of the operator. Besides, the engine characteristics were measured from engine vibration, as well as noise and dust pollution produced while the operators' physiological characteristics were measured from the workload illustrated by changes in heart rate, body temperature, and pain felt in the limbs. The results showed that the harvester had an engine vibration of 14.2 m/sec(2), noise 92.4 dB, exceeding the health threshold of 6 m/sec(2) and 80 dB. It is recommended that operation be carried out alternately with the operator period not more than 1 hour. The dust generated according to ISO 14644-1 was class 6 or clean and does not endanger the operator. Moreover, workloads based on operator heart rate measurements were very mild - moderate. The work-related pain analysis showed that 14% of the limbs felt a little sick while 3.3% were very ill. In general, it was concluded that to meet feasibility in relation to ergonomic aspects, there is need for design improvement efforts to reduce engine vibration and noise.