刈払機の最適シャフト長に関する研究
トラッキング実験および自覚による評価
1989 年 71 巻 4 号 p. 148-154
詳細
1989 年 71 巻 4 号 p. 148-154
This study empirically evaluated the optimal length L values (length from the center of circular saw to the rear grip center of brush cutter) for five slopes by the tracking test and the subject's feelings. The study was divided into two experiments. In the first experiment, a model shaft (0.75kg in weight) was used, and in the second one, the same model shaft was used, but 4.4kg weight was attached to it (0.8kg weight to the circular saw position and 3.6kg weight to the engine position. They were considered as the circular saw and engine weight). The results showed that the brush cutter weight (up to 5.15kg) hardly influences the optimal length L values and the optimal length L values are 149_??_153cm for a slope of -20°_??_0°, 141_??_147cm for 5°, 135_??_192cm for 10°, 134_??_138cm for 15°_??_20°. The authors suggest that the optimal length L of brush cutter should be simply adjustable at a range of 140±10cm.
