Movement hampering device for an exposure apparatus

An exposure apparatus comprising:

• a first mirror frame
• a second mirror frame,
• the mirror frames being supported so as to be reciprocatingly movable on a main body of an image-forming machine,
• an optical system driving device linked to the first mirror frame at a linking portion and linked to the second mirror frame for reciprocatingly moving the first mirror frame at a speed that is twice a speed of movement of the second mirror frame,
• means providing an operating opening in the main body for adjusting a linking position of the first mirror frame with respect to the optical system driving device, and
• a first mirror frame movement hampering device for hampering movement of the first mirror frame in an exposing direction, the first mirror frame movement hampering device including
• a closure detachably provided in the operating opening, and
• a movement hampering member mounted on the closure near the linking portion and capable of being positioned at a position at which the movement hampering member interferes with movement of the first mirror frame in the exposing direction, the movement hampering member being so mounted on the closure that the position of the movement hampering member is freely adjustable in a predetermined range in the reciprocating moving direction of the first mirror frame.