| 摘要 |
PROBLEM TO BE SOLVED: To automatically retreat a guiding relay lamp when large shaking occurs because of an earthquake or the like by disposing the guiding relay lamp to be moved retreating from an operation position and providing a control means for controlling the driving of a moving mechanism for positioning the same in the retreating position. SOLUTION: When an earthquake detector 29 in a machine room is actuated because of the occurrence of an earthquake or the like, an earthquake detecting signal is sent out to a control relay 28, then the control relay 28 is actuated, the electric conduction of a normally excited electromagnet 13 is cut off, its excitation is eliminated and a movable iron core 13a is moved upward. Then, a synthetic force between a tensile spring 26 and an auxiliary spring 27 becomes stronger than the returning force of a return spring 12, the upper end of the rear end part of a landing relay 3 is pulled left, and the floor landing relay 3 is then inclined. Then, a roller 16 in a rear side is slid down on the slope 11a of the rear end of a guiding base 11. Thus, a gap is formed between a guiding plate 5 and the landing relay 3, and the landing relay 3 is retreated to a retreating position completely separated from the guiding plate 5. |
