| 摘要 |
PROBLEM TO BE SOLVED: To permit opening of the lower open part of a hood unit simply by operating a hood cover for opening the lower open part of the hood unit. SOLUTION: Even when a connecting fitting 27 is released, the retaining relation of an engaging unit 17b to a retained unit is maintained and a hood cover 4 will not be pivoted downward. The hood cover 4 is moved utilizing a clearance so that the retaining relation of the engaging unit 17b to the retained unit 17a is released to open a hood unit (a). On the other hand, the retained unit 17a, retaining the engaging unit 17b provided in a curved condition from the front rim of the hood cover 4 to the rear back direction of the upper side of the same under the condition of surface engagement, is inclined upward from the lower part of front rim of open rim of the hood unit (a) toward the indoor ceiling of fore part whereby a safe mistaken-drop preventing countermeasure, in which the retaining relation will not be released unless otherwise the hood cover 4 is not pulled out slantingly upward intentionally into the direction of the inside of a room along the retained unit 17a, is constituted. |
