| 摘要 |
Door-swing restraint apparatus for a pair of latched doors closing an end opening of a cargo box comprises a chain or cable link connected between margins of the doors so that a person actuating a bar to release door latches will not be injured by freight items which bear against the door. One end of the link is fixed in the marginal edge of one door, the other end being fixed to a lever arm which can be selectably engaged with or disengaged from a lateral bracket on the latch bar of the other door, only when the arm is rotated out of its horizontal transport position into the vertical. Rotation of the bar due to torque exerted by a freight item pressing against the door is limited by a stop pin carried by the bar engaged in a slot in a door-mounted journal. The opening swing of the door is limited to a few centimeters as the link becomes taut and the lever arm remains horizontal, visually signalling the hazard. The lever arm is formed with a side-opening right-angle slot engageable with a pin in the latch bar bracket. In another embodiment the arm carries the pin and the bracket sidewalls are slotted.
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