Packing box

Abstract

To provide a packing box than can be easily made although corner portions of a trunk part thereof are increased.SOLUTION: A packing box 1 comprises a cylindrical trunk part 10, and blocking parts 20 blocking either of two open ends 10a of the trunk part 10. The trunk part 10 has a pair of long side plates 11 opposing to each other and a pair of short side plates 12 connected with the pair of long side plates 11 through fold lines (a) of the trunk part. The blocking parts 20 have flaps 21 connected to the long side plates 11 through flap fold lines (b1) and folded inward at the flap fold lines (b1). Additional fold lines (c) extending in the same direction as the fold lines of the trunk part, at a position closer to center sides of the long side plates 11 than both ends of the flap fold lines (b1) are formed in at least either of the pair of long side plates 11. Deformation inducting parts (d), which induce deformations of the flaps 21 or the long side plates 11 corresponding to folding-back of the additional fold lines c, are provided at the flap fold line (b1) sides, of the flaps 21 or of the log side plates 11.SELECTED DRAWING: Figure 1

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