| 摘要 |
PROBLEM TO BE SOLVED: To provide a filter device that can easily recognize a replacement time of a bag-like filter regularly without visually recognizing the bag-like filter.SOLUTION: The filter device comprises: a bag-like filter 2 that is stretchably formed of a knitted stretchable yarn and filters liquid G to be filtered; a filter support 3 for holding detachably an end portion near an opening of the bag-like filter; a filter case 4 that houses the filter support, with the opening side of the bag-like filter facing upward and the longitudinal direction thereof facing in the vertical direction; a case stand 5 that comprises a spring member 103 and supports the filter case to be movable up and down by spring force of the spring member; and an indicating device 6 for replacement for indicating replacement time on the basis of position in the vertical direction of the filter case relative to the case stand. |
