| 摘要 |
<p>A safety system for a moving walkway, preferably an escalator or travelator, having a missing step detector. The safety system, preferably adapted to be retrospectively fitted, comprises an interrupt unit to control the drive system and disable automatic movement of the steps upon detection of a predetermined event; namely, the detection of: a missing step, an engineer accessing the walkway, activation of an emergency stop/reset control, or manual control of the system. Automatic movement is then only enabled after a step is manually made to traverse a loop without the detection of a missing step. The interrupt unit preferably being adapted to determine the safety procedure has been completed by checking if the number of steps passing a fixed point is equal to or greater than the total number of steps in the loop. The system may also be adapted to monitor a signal from: the missing step detector, the braking system, and a safety interlock loop so as to determine the occurrence of the predetermined event. There is also provided a method claim for use of the system.</p> |
