| 摘要 |
PROBLEM TO BE SOLVED: To provide a lid body which is stronger than a conventional one, and can be stably fitted on an upper end of a box body, and to provide a box with lid provided with such a lid body.SOLUTION: Rib storage grooves 24 are formed on an upper face of a box body 10 being a fitting partner of the lid body 70, and lid lower face ribs 80 received by the rib storage grooves 24 are arranged in the lid body 70. Since The lid lower face ribs 80 are extended between lid side walls 75 of the lid body 70 facing each other, lower ends of lid side walls 75 of the lid body 70 are prevented from deforming so as to expand outside as before, and the lid body 70 can be stably fitted on the upper end of the box body 10. The flexural strength of the lid body 70 becomes large by the lid lower face ribs 80, and the lid body 70 is prevented from deforming to warp due to loading of a cargo. Furthermore, since the lid lower face ribs 80 have a lattice shape, the total strength of the lid body 70 becomes large. |
