FOLDING LADDER HAVING ALARM UNIT

摘要

The present invention relates to a folding ladder with an alarm unit, which comprises first and second vertical support stands which are rotatably connected by a hinge part as a unit. The folding ladder provides an alarm function by turning a switch off when the first and second vertical support stands are folded and turning the switch on when the first and second vertical support stands are unfolded in connection with the rotation of the hinge part. Especially, the present invention operates an alarm unit in connection with sensing signals of various sensors such as a tilt angle sensor, a weight sensor, and a sub sensor to provide the alarm function for a worker and surroundings.