| 摘要 |
PURPOSE:To prevent a load receiver and a hinged door from coolising with each other as well as to aim at safety and smoothness in handling work, by checking a rise of the load receiver at a time when the hinged door is below the specified opening, in case of a wagon having the double-leafed hinged door. CONSTITUTION:When a hinged door is opened as wide as more than the specified opening, switches 12A and 12B installed in a driving circuit 13 of a load receiver lifting gear come into a state of being connected to each other by a door-open detecting device 31. Next, when a lifting switch 32 is turned on, the circuit 13 comes into a state of being conducted, and a driving source 34 of the load receiver lifting gear operates, whereby a load receiver goes up, and when it comes to be flush with a floor surface of a load storage, handling work is performable. Reversely, when the hinged door fails to open fully or comes to be closed, door opening by the door- open detecting device 31 is no longer detected whereby these switches 12A and 12B of the driving circuit 13 maintain their intercepted states, or when these switches come into a connected state, they come to a breaking state. Therefore, even if the switch 31 is turned on, the circuit 13 is in no case conducted so that the driving source 34 does not operate, or if operated, if comes to a stop, thus a rise of the load receiver is suppressed. |
