To take out a display rapidly and easily even in the case of a driving device being out of operation due to a failure or the like by moving a clutch in the longitudinal direction of a rotary shaft to release engagement between a first pivoted part and the clutch.

In the case of automatic operation becoming difficult due to the failure of an actuator 11 in the state of a display being stored in a case 2, a storage time lock lever is released by a switch to release the fixed state of a storage time lock pin. A handle 10 is then rotated to move a clutch 7 in the longitudinal direction of a rotary shaft 3 through a clutch moving shaft 9 and the lever so as to release engagement with a first pivoted part 4. The rotary shaft 3 is thereafter freed from the first pivoted part 4 to which the actuator 11 is connected, and the rotary shaft 3 is rotated also with the help of the weight of the display, so that the display comes out of the case 2.