Estado de uso e conservação de motosserras com motores de combustão interna

Abstract

As motosserras são amplamente utilizadas no meio rural. Para mantê-las em bom estado de uso e conservação, faz-se necessário realizar a manutenção de forma adequada e dar instruções para o correto manuseio. Neste trabalho, as motosserrassão caracterizadas de acordo com as classes de potência, e dos conjuntos o motor, a transmissão e o corte. Foi utilizado um questionário para coletar informações sobre as 73motosserras usadas por produtores rurais na região central do estado do Rio Grande do Sul. Como resultado verificou-se que 63% dasmotosserras avaliadaspertenciam à classe de potência Média,das quais 82,6% apresentavam o ângulo de afiação dos dentes da corrente fora do padrão recomendado.Destaca-se que, a limpeza da vela de ignição e a inversão do sabre foram realizadas em 70% das motosserras avaliadas, e que 45% das máquinas apresentavam desgaste no conjunto coroa/pinhão. No conjunto de corteas motosserras da classe Média,evidencia-se que82,6% das unidades verificadas apresentavam ângulo de afiação dos dentes da corrente fora do padrão recomendado. As motosserras das classes Média e Pesada apresentaram a maior quantidade de problemas. Nota-se que, a falta de manutenção pode reduzir a eficiência operacional e a vida útil da motosserra.

Conservation conditions of chainsaws and electric chainsaws and safety of the farmers who operate these machines

“…As a result, chainsaws, without proper adjustment, lack of safety devices, and unqualified or inexperienced operators, can be important factors in the occurrence of accidents on rural properties. This was observed in the study by Ottonelli et al (2020), where it was detected that only 4% of respondents have some type of training or qualification to operate chainsaws. The authors emphasize that overconfidence in operating a light machine, which is also easy to handle and purchase, may mean that the operator is not interested in taking courses on their use and maintenance.…”

“…For this, basic maintenance tools were used (screwdriver, ratchet wrench, round and flat file, depth limiter, steel brush, brush, and burlap). A questionnaire that followed the methodology developed by Ottonelli (2020) with open, closed, or multiplechoice questions was applied. Its purpose was to know and determine the conservation conditions of chainsaws and electric chain saws.…”

“…The chainsaw is a machine of mechanical constitution consisted of three sets: engine, transmission, and cutting. Also, it consists of a power system, ignition system, starting system, and a clutch system (HASELGRUBER; GRIEFFENHAGEN, 1989;OTTONELLI et al, 2020). Similar in the constitution to chainsaws clarify that chainsaws differ in the source of energy to generate work, as they run with electric motors.…”

“…Inspections of agricultural machinery, especially sprayers, are widely used as an attempt is made to reduce accidents When handling chemical products. Inspection programs in sprayers started in the 1940s, intending to identify the conservation condition of sprayers in farming, and thus collaborate with the proper use of such equipment (REICHARD et al, 1991). Currently, the ISO 16122 standard establishes the methodology for carrying out inspections on sprayers, which has mitigated accidents and contaminations.…”

Hand-Arm Vibration in Different Operating Conditions With a Chainsaw

“…In many cases, the use of the chainsaw is indispensable due to the slope of the terrain, which does not allow mechanized cutting operations to be carried out. Ottonelli et al (2020) highlight that chainsaws are versatile machines and have a wide range of possibilities for domestic, agriculture and forestry use. Despite the versatility and importance of chainsaws, they can act as health stressors, as well as they may compose a group of ergonomic factors.…”