| 摘要 |
PURPOSE:To manufacture the titled device at low cost, by adjusting the moving distance of a moving body from the completion of exposure on an original to the stopping time to match with the moving distance of a sealing board between the forward optical path and backward optical path. CONSTITUTION:When a moving body 17 scans in the direction shown by the arrow A and exposure on the surfce of an original is terminated, a wire guide 21 installed to the lower surface contacts with a spherical member 26 fitted to a wire 24 at the time when the exposure is terminated. The wire guide 21 moves the member 26 toward a pulley 23 until it stops and the wire 24 turns pulleys 22 and 23. The rotation of the pulley 22 is transmitted to another pullery 28 and moves a wire 34 in the direction shown by the arrow A'. As the wire 34 moves, a wire 38 is moved in the direction of arrow A'' through a pulley 31 and shaft 35 and a sealing board 39 fitted to the wires 34 and 38 is moved to a position shown by the dotted lines. When the douser 39 is moved to the position, a forward optical path (a) is opened, but a backward optical path (b) is blocked. |
