Problem to be solved: to provide a fall prevention device for a loading work of a staggered type trailer in which a crew or the like can be assembled and disassembled by one person, and the occupant space in the decomposed state is relatively small.A fall prevention device 100 is mounted on the bedTwo stanza 10 having a front support member supporting member 11 having a front support member supporting member 11 standing upright on a front receiving frame of a front side of a plane 2 of a stalled type TrailerThe suspension support member 13, which is disposed at the rear side of the rear surface of the flat plate 2 on the rear side of the flat plate 2, is connected by a pivot fulcrum 12C, and has two stanza 12 with a support member, andA front pillar 14, which is a hollow column detachably mounted on the front support member support memberThe rear support post 15, which is a hollow column detachably mounted on the rear support support member 13, andA wire 16 extending between the front support post 14 and the rear support post 15 as a parentIs provided.Diagram
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