| 摘要 |
PROBLEM TO BE SOLVED: To provide good stability without rattling even though a motor vehicle passes on a sub-gutter lid arranged at the end portion on the gutter lid on the gutter lid molded with cast iron comprising a main gutter lid having an isosceles triangle and a sub-gutter lid having a right angled triangle. SOLUTION: The base of a sub-gutter lid (2) is extended about one half and the supporting point is extended, the width of the leg (7) of the top is doubled to a sub-gutter lid (2')---the width is the same as that of the leg (4) of the top of main gutter lid (1)---and when a neighboring main gutter lid (1) is divided into the right and left by a vertical line (16) from an intersection (14) of identical two sides (12) and (13) to a bottom side (15), the right angled triangle portion(a) at the side in contact with the sub-gutter lid (2') is fitted to the shape of the sub-gutter lid and is made to the main gutter lid (1') of a scalene triangle with the side extended for making a contacted side.
|
