AIR FILTER UNIT

PROBLEM TO BE SOLVED: To easily replace an air filter accommodated in a casing while stably pressing the air filter to the casing or releasing press.SOLUTION: An air filter unit is provided with: an air filter; and a casing. The casing further has a pressing mechanism for pressing the air filter to an inner wall of the casing so that the air filter covers an opening. The pressing mechanism has: an operated member which is operated to move by using a direction orthogonal to a direction of air flow as a moving direction, and whose motion in the direction of the air flow is constrained; a pressing member which presses the air filter to the direction of the air flow by a fact that the operated member is operated; and a coupling mechanism which is connected with each of the operated member and the pressing member to couple the operated member with the pressing member. The coupling mechanism causes the pressing member to approximate or separate from the air filter in accordance with movement of the operated member in the moving direction.SELECTED DRAWING: Figure 3 【課題】エアフィルタをケーシングに対して安定して押し付けまたは押し付けの解除を行いつつ、ケーシングに収納されたエアフィルタを容易に交換する。【解決手段】エアフィルタユニットは、エアフィルタと、ケーシングとを備える。ケーシングは、さらに、エアフィルタが開口部を覆うようにエアフィルタをケーシングの内壁に押し付ける押付機構を有している。押付機構は、気流の方向と直交する方向を移動方向として移動するよう操作される被操作部材であって、気流の方向への動きが拘束された被操作部材と、被操作部材が操作されることでエアフィルタを気流の方向に押し付ける押付部材と、被操作部材および押付部材のそれぞれと接続され、被操作部材と押付部材とを連結する連結機構と、を有している。連結機構は、被操作部材の移動方向への移動に伴って押付部材をエアフィルタに対し接近または離反させる。【選択図】図３