| 摘要 |
PROBLEM TO BE SOLVED: To surely suppress fluttering generated when a door is closed by making the gravity center position of the door substantially coincident with the center of a reaction force received by the door from a weather strip at the time of closing the door. SOLUTION: The gravity center G of a door 1 is positioned in a place roughly symmetrical to the left and right directions thereof. On the other hand, the gravity center G is shifted to a lower side from the upper and lower center of the door 1 and the spring constant of a weather strip 10 is set to be low in an upper side more than the position of the gravity center G [i.e., in the part of the upper side (2) of a virtual line A passing through the gravity center G] and high in its lower side [i.e., in the part of the lower side (1) of the virtual line A passing through the gravity center G] and thus the center E of a reaction force is made substantially coincident with the gravity center G. In other words, by making a moment around the gravity center produced in the upper side of the virtual line A at the time of closing the door equal to that produced in the lower side at the time of closing the door, the fluttering of the door 1 is suppressed. |
