To solve the problems of degradation of appearance, safety, and crime prevention wherein when a shaft is extracted from a rotating part, blade plates are disengaged in a conventional hinge, by storing a hinge used for a movable body like a door, a hinged door, and a cover used for an opening completely between the opening part and the movable body to eliminate a projected part.

In this hinge 1, the shaft is passed through a tube part formed at the end and the plurality of blade plates are rotatably connected thereto. A guide plate 21 is overlappingly disposed on the surface 13 of one blade plate 12 while keeping a parallel clearance therebetween. When a movable mechanism 31 incorporated between the blade plate and the guide plate is moved when the cover 2 is opened and closed, the rotating part 19 is projected from the storage position by changing the relative position of the blade plate to the guide plate to provide a necessary opening angle to the cover.