| 摘要 |
PROBLEM TO BE SOLVED: To facilitate pulling-out of a filter unit from a casing.SOLUTION: A filter unit has a filter 31 and a drive roller 36 and is attached inside a casing so as to be attached to and removed from. A support member is inserted into the casing from a front side when the filter unit is attached to support the filter unit having reached a filter usage position. A lock member 60 can take a lock attitude for locking the filter unit at the filter usage position at the support member and a lock release attitude for releasing lock of the filter unit with respect to the support member. The lock member 60 has a first portion 63 for pressing the filter unit at the support member side when taking the lock attitude, and a second portion 64 for pulling out the filter unit to the front side from the filter usage position by moving the drive roller 36 to the front side when taking the lock release attitude. |
