| 摘要 |
PURPOSE:To form a good air discharge shape by providing a shaft cover which encloses a revolving shaft and curves and expands gradually from an inside casing to an air discharge guide plate to the center of the air discharge guide plate. CONSTITUTION:The shaft cover 25 is integrally provided to the central part of the air discharge guide plate 23 of a blasting device for a liquid chemical spraying car used in an orchard, etc. The shaft cover 25 has the sectorial sectional shape expanding toward the upper side and is so eccentrically disposed that the revolving shaft 10 passes the inside of the shaft cover 25 in the position in proximity to a pivot part 26 of the sectorial shape. The shaft cover 25 is fitted into the bottom end 28 of the inside casing 17 at the top end 27 having the smallest sectorial sectional shape and is diametrally expanded from the top end 27 up to the air discharge guide plate 23. The ideal liquid chemical spraying pattern is thus easily obtd.
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