| 摘要 |
PROBLEM TO BE SOLVED: To provide a louver, in which a filter can be replaced without making a fitting work form the inside of an object to be fit up. SOLUTION: An erection wall 7 is formed around the louver body 1 except the lower part. Vertical grooves 8a are made on the sides of the wall 7, and a joint groove 2b is connected to the vertical grooves 8a. A protrusion strip 3a fitting to the grooves 8a, 8b is made on the side of the hood 3 and in the inside of the upper face. Thus, the louver can be fit by locking the protrusion strip 3a to the grooves 8a, 8b by sliding operation from the upside of the hood 3. |
