PROPOSAL FOR AN ERGONOMIC CONFORMITY INDEX FOR EVALUATION OF HARVESTERS AND FORWARDERS

ABSTRACT Context: In mechanized forestry work, the ergonomic conditions of the workplace affects operator's health, performance and productivity. Originality: A comparison of different forest machines becomes complex in case where it is required analysis of several ergonomic factors simultaneou...

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Bibliographic Details
Published in:Revista árvore Vol. 41; no. 4
Main Authors: Marzano, Felipe Leitão da Cunha, Souza, Amaury Paulo de, Minette, Luciano José
Format: Journal Article
Language:English
Published: Sociedade de Investigações Florestais 01-01-2017
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Summary:ABSTRACT Context: In mechanized forestry work, the ergonomic conditions of the workplace affects operator's health, performance and productivity. Originality: A comparison of different forest machines becomes complex in case where it is required analysis of several ergonomic factors simultaneously. There are several methods of ergonomic analysis however, a more complete methodology that considers several ergonomic factors and produces an index that represent the ergonomic condition of the machine is needed. Objective: Propose a methodology to determining an Ergonomic Conformity Index to evaluate Harvesters and Forwarders of different brands. Methodology: The ECI was determined initially basing in four relevant ergonomic factors: noise, vibration, thermal environment and air quality. These factors were evaluated utilizing four Harvesters and two Forwarders in eucalyptus timber harvesting operations. For each factor, a score was given according to its compliance with the established parameters. The ECI was obtained from an average of the scores given to each factor. The index ranges from zero to one, so that lower values indicate worse ergonomic conditions. Results: All the analyzed machines had continuous noise between 75.0 and 82.6 dB (A) and whole-body vibration between 0.27 and 0.70 m s-2. HV1 and HV2 presented thermal environment in accordance with the established criteria, other machines showed deficiencies in this regard. All the machines presented non-conformities in the air quality, except HV2. The ECI of Harvesters HV1, HV2, HV3 and HV4, were 0.83; 0.88; 0.71; 0.63. The ECI of Forwarders FW1 and FW2 were 0.58 and 0.79. Conclusion: The determination of the ECI allowed an evaluation and comparison between analyzed forest machines. The machine with the higher ECI had only one non-conformity, and it was related to noise inside the cab. The machine that got the lower ECI presented non-conformities for all the factors. RESUMO Contexto: No trabalho florestal mecanizado, as características ergonômicas do posto de trabalho influenciam a saúde, o desempenho e a produtividade dos trabalhadores. originalidade: A comparação entre diferentes máquinas florestais se torna complexa quando se deseja analisar diversos fatores ergonômicos simultaneamente. O Índice de Conformidade Ergonômica (ICE) proposto neste trabalho considera diversos fatores ergonômicos e permite uma comparação simples e objetiva entre máquinas florestais. Objetivo: Desenvolver metodologia para determinação do ICE e estabelecer uma comparação entre Harvesters e Forwarders de diferentes marcas com o uso do ICE. Metodologia: O ICE foi determinado a partir da media de ICE parciais para ruído, vibração, ambiente térmico e qualidade do ar. Foi realizada avaliação desses fatores em quatro Harvesters e dois Forwarders. Resultados: Todas as máquinas analisadas apresentaram ruído contínuo entre 75,0 e 82,6 dB(A) e vibração de corpo inteiro entre 0,27 e 0,70 m s-2. Dois Harvesters apresentaram ambiente térmico em conformidade com os critérios estabelecidos, as demais máquinas apresentaram deficiências neste aspecto. Os ICE dos Harvsters HV1, HV2, HV3 e HV4 foram, respectivamente: 0,83; 0,88; 0,71 e 0,63. Os ICE dos Forwarders FW1 e FW2 foram 0,58 e 0,79. Conclusão: A metodologia proposta se mostrou viável para a comparação de máquinas florestais. A única não conformidade da máquina de maior ICE foi em relação ao ruído. A máquina que obteve menor ICE apresentou não conformidades para todos os fatores analisados.
ISSN:0100-6762
1806-9088
0100-6762
DOI:10.1590/1806-90882017000400001