Amaury Paulo de Souza

AVALIAÇÃO DA CARGA DE TRABALHO FÍSICO E ANÁLISE BIOMECÂNICA DE TRABALHADORES DA CARBONIZAÇÃO EM FORNOS TIPO "RABO-QUENTE" 1

ABSTRACT – The main objective of this study was to evaluate the physical work load and the biomechanicalanalysis of 20 workers at the wood carbonization in hot tail charcoal kilns, located in the North of the MinasGerais State, Brazil. Cardiac frequency was analyzed using the Polar Eletro Oy system from Finland. Thetime required by the workers per activity was evaluated through the individual chronometry method andthe biomechanical analysis was carried out by a software developed by the Michigan University. The resultsshowed that the cardiovascular load required was of 44.5%, which was classified to be moderately heavy.The most time consuming activity was the sealing of the kiln. There is a compression risk of the L 5 – S 1 vertebraldisk for the kiln loading labor, during the steps basket lifting and log removal.Keywords: Ergonomics, cardiac frequency and injury. Sociedade de Investigacoes Florestais AVALIACAO DA CARGA DE TRABALHO FISICO E ANALISE BIOMECÂNICA DETRABALHADORES DA CARBONIZACAO EM FORNOS TIPO “RABO-QUENTE”

ANÁLISE TÉCNICA E ECONÔMICA DO FORWARDER EM TRÊS SUBSISTEMAS DE COLHEITA DE FLORESTAS DE EUCALIPTO 1

This work aimed to evaluate a forwarder, technically and economically, under three eucalyptus forest harvest subsystems. The technical analysis included a productivity and motion and time study. The economic analysis included the parameters operational cost, production cost and energy consumption. Loading consumed more than 80% of the total cycle time in the subsystems studied. The average travel distance influenced unloaded and loaded travel times. The forwarders operational cost was US

Avaliação dos níveis de ruído, luz e calor em máquinas de colheita florestal

60.70/ha. The forwarder production costs were US

Caracterização da saúde de trabalhadores florestais envolvidos na extração de madeira em regiões montanhosas

1.74 , 1.53 and 2.51 /m 3cc, in subsystems 1, 2 and 3, respectively. The energy consumption rates were 2.76; 2.42 and 3.98 g/kW*m 3 cc, (FORMATAR )in subsystems 1, 2 and 3, respectively.

Avaliação dos níveis de vibração vertical no assento de um trator agrícola de pneus utilizando um sistema de aquisição automática de dados

This research was developed with data collected in areas of wood harvesting by three companies of the State of Minas Gerais, Brazil. The general objective was to evaluate the level of noise, light and heat of forest harvesting machines. The work stations of the following machines were evaluated: Feller-Buncher, Skidder, Bucking Tongs, Mechanical Bucking and Forest Loader. The noise levels were measured with the use of a dosimeter, the light with a digital luximeter and the heat exposure with the IBUTG. At company 1, the two evaluated forest tractors, while stopped, presented the same level of noise, both had internal lighting and good thermal conditions. At company 2, for the three evaluated machines, the level of noise was below the limits recommended by the NR 15. The cabins had internal light and thermal regulation. At company 3, all the machines showed noise levels above those allowed by the Brazilian legislation. The forest loader and the mini-skidder showed poor lighting and the indexes of effective temperature were outside the thermal comfort zone for all machines. It is concluded that all the machines used by company 3 are ergonomically non-complient.

Avaliação ergonômica de cadeiras residenciais fabricadas no pólo moveleiro de Ubá, MG

RESUMO ‐ Este estudo teve como objetivo caracterizar a saude dos trabalhadores florestais envolvidos na atividade de extracao de madeira em regioes montanhosas. A pesquisa foi realizada em uma empresa florestal localizada no Distrito Florestal do Vale do Rio Doce, sendo estudados 100% dos trabalhadores. Para caracterizacao da saude destes, foi utilizado um questionario estruturado em forma de entrevista, baseado na Pesquisa Nacional por Amostra de Domicilio (PNAD). Os resultados evidenciaram que as atividades de extracao florestal tem causado impactos negativos sobre a saude dos trabalhadores , visto que 66% deles disseram sentir dor em alguma parte do corpo, 79% afirmaram ter algum problema dentario, 86% relataram ficar expostos a fatores que prejudicavam sua saude, 20% apresentaram algum disturbio do sono, 9% nao tinham acesso a saneamento basico e 29% ja havia sofrido acidentes de trabalho. Ao termino deste estudo, conclui-se que os trabalhadores florestais da extracao de madeira estao expostos a situacoes de vida e trabalho que nao contribuem para a promocao e manutencao da saude desse pessoal.

Estudo antropométrico de operadores de motosserra

A study was carried out at the Faculdade de Engenharia de Guaratingueta - FEG-UNESP, SP, in the acoustic and vibration laboratory as well as in an experimental area, to: a) determine the levels of vertical vibration in both the seat and seat base of an agricultural tire tractor under operation (harrowing) at different forward speeds; b) characterize the frequency range presenting the highest vertical vibration peaks in the tractor operator seat; c) analyze ride comfort for tractor operators by comparing the actual level of vibration with that of the main effective norms. The data acquisition system consisted of some vibration sensors, conditioners, amplifiers, and a digital-analogical converter plugged to a microcomputer and connected to the tested tractor. Later, the data were treated by the program ORIGIN 50. Based on the results, it was concluded that the acceleration levels obtained at the upper part of the seat were much lower than those in the seat base at the three operational speeds, whereas the third gear presented the highest vibration levels; the frequency range from 2 to 4 Hz presented the highest peaks of vertical vibration; the values of the total weighted acceleration were found to be much above the limits determined by the norm ISO 2631 for an 8-working hour period; the vibration levels increased as the forward speed of the tractor-implement system increased.

Análise técnica e econômica da colheita florestal mecanizada em Niquelândia, Goiás

The objective of this work was to carry out ergonomic evaluation of residential chairs manufactured in the furniture industry of Uba, MG, seeking improvement of ergonomic quality of the pieces of furniture, as well as the increase in competitiveness of the products originated from of this pole. Data was collected in 15 chairs from 12 industries associated with the Trade Union of Ubas furniture industry- INTERSIND. The criteria for ergonomic conformity were defined in agreement with the anthropometric principles of ergonomics and users safety aspects. The data obtained were compared with recommendations and anthropometrical data reported in the literature. The major problems detected in the chairs were related to seat dimensions and seat height from floor, in which 100% of the chairs presented seat heights higher than the recommended by the literature. The back portions showed no problems in relation to width, however the seat inclination angles must be adapted. Another observed aspect was the great number of corners and sharp edges that can cause accidents to users.

Avaliação biomecânica de atividades de produção de mudas de Eucalyptus ssp.

The general objective of this work was to anthropometrically study the chainsaw operators during the forest harvest of Eucalipytus spp. The specific objectives were to find out the anthropometrics patterns of chainsaw operators; to determine the minimum and maximum limits of the variables studied; and to select variables, which correspond to the dimensions of the chainsaw for the operator. Data collection was done at a pulp and paper enterprise located in the state of Sao Paulo, Brazil. Thirty-five anthropometrics variables were selected for the study. Eighty-five chainsaw operators (totaling 100% of the operators of the enterprise) were evaluated. The mean weight of the operator was of 67.9 kg. The 50% presented a value of 1.705 m for the variable height of the top of the head. The minimum space for the introduction of the hand in the handler of the chainsaw should not be less than 0.115 m. The minimum depth for the introduction of the hand in the chainsaw handler should not be less than 0.088 m.

Avaliação do ambiente de trabalho na propagação de Eucalyptus spp.

The objective of this paper was to technically and economically analyze the stages of the automated harvest of eucalyptus wood relating to its cutting, extraction, processing and transport. In the technical analysis, different production modes were compared in productivity terms per effective hour and the time for the elements of the operational cycle of each studied machine was observed. Economically, the costs of production of each machine that act in these stages were determined. It was observed that the highest production cost was for the Feller-Buncher machine used in the cut stage. The different production modes did not differ statistically from the modes for Feller-Buncher and for the Tracer forest. However, for the forest Loader there was a statistical difference for the time of filling of the two different load sizes.