Mounting screw retainer structure

摘要

To provide a mounting screw (48) retainer structure which can prevent a mounting screw (48) from falling down from a component and can also prevent the interference of the mounting screw (48) with any other related component. In a fastening portion (45) for fastening an upper retaining portion (70) and a lower retaining portion (73) by means of a mounting screw (48), the upper retaining portion (70) has a screw hole (71) and a cylindrical guide formed around and above the screw hole (71). Further, a projection (72) is formed on the inner wall of the cylindrical guide at an upper portion thereof. In a loosened condition of the mounting screw (48) where it is disengaged from a screw hole (74), the head portion of the mounting screw (48) is caught to be retained by the projection (72). The upper portion of the cylindrical guide is tapered so that it has an inner diameter smaller than the diameter of the head portion of the mounting screw (48). Accordingly, even when the upper retaining portion (70) is turned upside down in the loosened condition of the mounting screw (48), the mounting screw (48) does not fall down from the upper retaining portion (70). Further, the amount of projection of a lower end portion (48a) is small, so that the upper retaining portion (70) can be moved without the interference of the lower end portion (48a) with any other related component. This retainer structure is suitable for fastening of a cover for an air cleaner box (60) whose installation space is narrow.