| 摘要 |
PURPOSE: Provided is a filter bag fixing apparatus in which a rack gear pulls a band combined with a lower end portion of the filter bag to seal firmly the filter bag, and a blocking ring moving in vertical direction is installed at a lower end portion of the filter back to prevent leakage of dusts. CONSTITUTION: The apparatus comprises a housing(30) coupled to an end of a band(20) which is installed to surround an upper portion of an inhaling tube(10) and a lower portion of a filter bag combined with the inhaling tube(10), a driving shaft(40) rotatably installed in the housing(30) and having a socket(41) on top, a pinion gear(42) around itself and a beveloid gear(43) around itself under the pinion gear(42), a rack gear(22) combined with the pinion gear(42) and coupled to and decoupled from another end of the band(20) in accordance with the rotation movement of the pinion gear(42), a shaft(50) with a beveloid gear(51) which is arranged at the top thereof and combined with the beveloid gear(43) of the driving shaft(40), and a worm gear(52) around itself, a worm(60) combined with the worm gear(52) and moving vertically along the outer surface of the band(20), and a blocking ring(70) installed at a lower portion of the worm(60) so as to move vertically, thereby supporting the lower end of the filter bag.
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