Full text
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| Author(s): |
Gustavo Fontana
Total Authors: 1
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| Document type: | Master's Dissertation |
| Press: | Piracicaba. |
| Institution: | Universidade de São Paulo (USP). Escola Superior de Agricultura Luiz de Queiroz (ESALA/BC) |
| Defense date: | 2005-11-11 |
| Examining board members: |
Fernando Seixas;
Paulo Torres Fenner;
Marcos Milan
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| Advisor: | Fernando Seixas |
| Abstract | |
The objective of this work was the cab evaluation of four forwarders and two skidders models, considering the positioning of commands and instruments and the operator visual area, on the basis of the anthropometrics characteristics of a sample of Brazilians operators. The analyses had been made in machines operating in relevant areas of wooden forest from two forest companies, located in Mogi Guaçu and Lençóis Paulista municipalities, State of São Paulo. The command position was determined in three dimensions (x, y and z), considering the operators seat reference point as the origin. A qualitative evaluation with the operators of the forest tractors was also done, revealing their satisfaction about several ergonomics factors related with the forest machines. The anthropometric evaluation of the operators was made by means of a special chair developed by the Fundacentro, resulting in the areas of maximum and excellent access for the commands localization. The visual area of the operator was determined with a illumination device and the landmark of the shaded area, considered as a field of null visibility. The machine with the best commands position, in accordance with the biotype of this set of Brazilians operators, was the forwarder Valmet 890,2, followed by the skidder Caterpillar 545, being the only tractors that had presented more than half of the commands, 66.7% and 54.5% respectively, well positioned. The forwarder Valmet 890,2 also presented the best visual field, with all forwarders models being superiors, in this evaluation, to the skidders. The results of this study had demonstrated, in terms of commands position, ergonomic projects of those forest machines not very favorable to the set of analyzed Brazilians operators. (AU) | |