| 摘要 |
PROBLEM TO BE SOLVED: To provide a crude-dust filter for box structure which is ready for a box structure, which accommodates items to be accommodated such as heat-emitting vacuum pumps and blowers, and is suitably installed; to provide an air pressure device station using the filter. SOLUTION: The crude-dust filter 90 prevents the intrusion of dust into the inner part of a box structure. In addition, the filter 90 is inserted, for its mounting, between a pair of guide grooves provided in the inner side of the box structure and is arranged in a plate-like form. Further, a plurality of filter units 90A, which are composed of; frame bars 94 formed in a frame form from the outer edges by bar-like materials so that they may fit the guide grooves; and filter materials 95 stretched in the frame bars 94, are parallely arranged in a flatly connected state and can be folded in the inserting direction. COPYRIGHT: (C)2009,JPO&INPIT
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