| 摘要 |
PROBLEM TO BE SOLVED: To replace by plastics to reduce cost and obtain ventilating effect by providing venting ports on an extrusion molded form through secondary work such as pressing or the like. SOLUTION: A diagram shows a case wherein two stages of a louver, consisting of three pieces of wings 3, are combined. One end of widthwise direction is cranked from the rear surface toward the front surface thereof. A recessed short wall is ended before the curved position of the cranked part. The tip end side 6 of the cranked part is fitted into a space between the recessed short wall 4 and a recessed long wall 5. The other end, side 7 of the cranked part is provided with one or a plurality of pieces of vent ports 1 with an interval. In this case, the length 9 of the recessed long wall is longer than the positions 8 of the vent ports 1 whereby the vent ports can not be seen on the front surface. On the other hand, a space 10 is formed between the other end side 7 of the cranked part and the recessed long wall to obtain ventilation. |
