| 摘要 |
PROBLEM TO BE SOLVED: To provide an electric railroad crossing gate and a resetting method for the electric railroad crossing gate, allowing a gate bar to be automatically moved up to give no trouble to road traffic when the gate bar is moved down due to interference such as mischief. SOLUTION: When a power supply for a relay driver 26 is cut due to interference such as mischief, resulting in a shut-off relay 29 turned off, cancelled self-holding and a gate bar, not illustrated, moved down, if a movement-up command is given, the make contacts 24, 30 of a movement-up relay 2 is turned on, the shut-off relay 29 is forcibly energized and the make contact 28 of the shut-off relay 29 is turned on to cause the make contacts 35, 36 of the shut-off relay 29 to be turned on to energize a motor, whereby the gate bar is moved up. After a short period, a relay to be operated with delay is turned on and the break contacts 25, 31 are turned off, whereby the forcible energization is cancelled. However, voltage is output from a relay driver 26 if a device is normal, therefore permitting the shut-off relay 29 to be self-held by the make contact 28, or reset, and an electric railroad crossing gate to be restored to a normal condition.
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