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Autor(en) / Beteiligte
Titel
Efficiency of anti-vibration gloves in soil preparation using a micro tractor/Eficiencia de luvas antivibratorias na operacao de preparo de solo utilizando microtrator
Ist Teil von
  • Revista brasileira de engenharia agrícola e ambiental, 2020-06, Vol.24 (6), p.422
Ort / Verlag
ATECEL--Associacao Tecnico Cientifica Ernesto Luiz de Oliveira Junior
Erscheinungsjahr
2020
Link zum Volltext
Quelle
EZB Free E-Journals
Beschreibungen/Notizen
  • During the working day, agricultural machinery operators are often exposed to physical risks, such as vibration, which can compromise their health and performance. Micro tractors emit high levels of vibration, which mainly alfect their hands and arms. Thus, this study aims at evaluating the efficiency of different glove models in reducing vibration transmitted by the micro tractor/rotary tiller assembly according to the operating velocity and the rotation of the rotary tiller rotor. A completely randomized block design was used in a 4 x 2 x 2 factorial arrangement with five replicates. The study analyzed three glove models (G1 and G2 anti-vibration models, and anti-impact model G3) and a control treatment under the same operating conditions, but without the use of protective equipment. The study was conducted at two operating velocities (VI = 0.98 km [h.sup.-1] and V2 = 1.6 km [h.sup.-1]) and two rotations of the rotary tiller rotor (R1 = 265 rpm and [R.sup.2] = 520 rpm). None of the evaluated glove models reached the attenuation capacity required by the Occupational Hygiene Standard (Norma de Higiene Ocupacional - NHO 10) and, under some operating conditions, they raised the incident vibration levels, exceeding the values obtained when the work was performed without a protective equipment. Although the anti-impact model G3 and the anti-vibration model G2 did not reduce the transmitted vibration to the levels considered acceptable by NHO 10, the anti-impact G3 and anti-vibration G2 models showed better performance in the work performed at a velocity of 0.98 km [h.sup.-1] and a rotation of 520 rpm of the rotary tiller rotor. Key words: personal protective equipment, vibration transmissibility ergonomics Durante a jornada de trabalho, o operador de maquinas agricolas se encontra frequentemente exposto a riscos fisicos, como a vibracao, que podem comprometer sua saude e desempenho. Os microtratores emitem elevados niveis de vibracao que afetam especialmente o sistema maos e bracos. Assim, objetivou-se avaliar a eficiencia de diferentes modelos de luvas na reducao da vibracao transmitida pelo conjunto microtrator/enxada rotativa em funcao da velocidade de operacao e da rotacao do rotor da enxada rotativa. O experimento foi conduzido no delineamento experimental inteiramente casualizado em esquema fatorial 4x2x2 com cinco repeticoes, sendo tres modelos de luvas (L1 e L2, modelos antivibratorias, e L3 modelo anti-impacto) e um tratamento controle que consistiu das mesmas condicoes de operacao sem o uso do equipamento de protecao, duas velocidades de operacao (V1 = 0,98 km [h.sup.-1] e V2 = 1,6 km [h.sup.-1]) e duas rotacoes do rotor da enxada (R1 = 265 rpm e [R.sup.2] = 520 rpm). Nenhum dos modelos de luvas experimentadas apresentou capacidade de atenuacao exigida pela Norma de Higiene Ocupacional (NHO 10) e em algumas condicoes de operacao elevaram os niveis de vibracao incidente, superando os valores obtidos na realizacao do trabalho sem o uso do equipamento de protecao. Embora nao reduzindo a vibracao transmitida aos niveis considerados aceitaveis pela NHO 10, os modelos anti-impacto L3 e antivibratorio L2 apresentaram melhor desempenho na operacao realizada na velocidade de 0,98 km [h.sup.-1] e rotacao de 520 rpm no rotor da enxada rotativa. Palavras-chave: equipamento de protecao individual, transmissibilidade de vibracao, ergonomia
Sprache
Englisch
Identifikatoren
ISSN: 1415-4366
eISSN: 1807-1929
DOI: 10.1590/1807-1929/agriambi.v24n6p422-427
Titel-ID: cdi_gale_infotracmisc_A630868768
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