| 摘要 |
PROBLEM TO BE SOLVED: To provide a box for which workability at the time of box-building up is improved, and the sealing and unsealing are easy, having an opening at the box upper section, and of which the air-permeability is favorable. SOLUTION: On the upper ends of connected four side surfaces, a pair of internal flaps 17 which are confronted with each other and are folded inward, and a pair of external flaps 17 which are confronted with each other and folded on the top of the internal flaps are respectively provided. Then, an opening is formed on the box top surface of this housing box under a state wherein the pair of internal flaps and the pair of external flaps are folded. In such a housing box, at the distal ends of the pair of internal flaps, a pair of right and left approximately triangular notched sections 17a are provided in a manner to be adjacent to the opening of the box top surface. Also, a pair of right and left V-shaped ruling lines 17b are provided from the corners of the notched sections on the internal flaps to a folding line being connected with the side surface. The external flaps are formed to be an approximately isosceles-trapezoidal shape. At the same time, at the right and left corners at the distal ends of the external flaps, an approximately mountainous protruding section 16a which passes through the notched sections of the internal flaps, which are bent by pulling up, is provided. COPYRIGHT: (C)2003,JPO
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