| 摘要 |
PURPOSE:To remove dust from a working part rapidly without retention thereof by a method wherein a ventilating hole is provided on the side wall of a ceiling vicinity accommodating air cleaning elements. CONSTITUTION:The ventilating hole is provided on the side plate 4 located under the commutating plate 15 of the workin part 7a. An air retaining portion generating at the clean air blow-off part of the clean room is removed by utilizing higher pressure of the room than the preserving area 22 and the flowing of the clean air in the clean room is improved so as not to generate the disorder thereof. That is, the flowing of the clean air blown from the commutating plate does not generate any eddy in the air current, accordingly, the dust generated in the room is removed together with the air current from the working apparatus and the products without the stagnation of the dust. The air- stagnating part does not exist in the room, therefore, the stationary air current condition may be returned rapidly even in case the air current is disturbed by the movement of the workers in the room. |
