| 摘要 |
<p>An escalator combplate (40) is equipped with a stop switch that will interrupt the power to the escalator when objects trapped between the stop treads and combplate impose a predetermined lifting force on the combplate, which is determined by safety code requirements. In accordance with the invention the combplate (40) is subjected to an upward force which equals the code-dictated lifting force by a calibration tool (50) having a bridge member (60) spanning the combplate (40) with a vertically movable rod (62) attached thereto by a brochet (64). A coil spring assembly (68,70,72) is mounted on the rod (62), the force exerted by the spring (70) being variable to equal the required lifting force. While the combplate (40) is being lifted by the spring force, the stop switch or switches are set so that they will actuate at the calibrated position of the combplate. The spring force is then removed to allow the combplate to settle back to its normal operating position. <IMAGE></p> |
