| 摘要 |
PROBLEM TO BE SOLVED: To solve problems that the assembly at site of a box frame body is troublesome in steps thereof, large force is required for the turning and tightening work even when a turning and tightening tool exclusive for the assembly is used, the assembly is not easy, most of the assembled box as a cargo in a completed manner in a manufacturing factory of the box frame body forms a vacancy, equivalent to wasteful carriage of air, the transport is uneconomical, and the transport efficiency is very poor. SOLUTION: A nail leg 3 is provided on both end sides, a simple assembly box frame piece 1 is formed in an iron clamp while a skeleton 2 (a body) is elastic, a hooking hole 6 or a hooking groove is provided on a side surface of a box frame plate 5 forming the box frame body 4, the box frame body 4 is assembled in a folded condition by firmly inserting the nail leg 3, and stretching the nail leg over the adjacent box frame body, and a box body can be easily assembled by pulling or pushing open and expanding the box frame body.
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