AIR PASSAGE OPENING/CLOSING DEVICE

PROBLEM TO BE SOLVED: To enhance the sealing property of the neighborhood of a parting face without increasing door operation force. SOLUTION: The air passage opening/closing device is provided with: a case 11 for forming openings 21, 23 of the air passage; and a door 28 arranged in the case 11 and opening/closing the openings 21, 23, and the door 28 is constituted of: a rotation shaft 28a; a door base plate part 28b; and plate-like elastic sealing materials 28c, 28d. Case side seal surfaces 21a, 23a pressed with the elastic sealing materials 28c, 28d are formed on peripheral edges of the openings 21, 23, and the case 11 is constituted such that a plurality of division cases 11a, 11b divided by the parting face S extending in a direction crossing to the rotation shaft 28a are integrally fastened. The case side seal surfaces 21a, 23a are divided by the parting face S and are formed to a plurality of division cases 11a, 11b. The elastic sealing materials 28c, 28d have a protuberance shape that a portion opposed to the parting face S in a rotation shaft 28a direction is protruded toward the case side seal surfaces 21a, 23a than the other portion. COPYRIGHT: (C)2009,JPO&INPIT