| 摘要 |
<p>PROBLEM TO BE SOLVED: To simply change a bulk of a corrugated board box without deteriorating a texture of corrugated board and make the box respond to change of size of a product as well. SOLUTION: A lower box 1 is formed out of corrugated board into a pail-like shape whose top end side is opened. Likewise, an upper box 2 is formed out of corrugated board into a pail-like shape whose bottom end side is opened, which can be inserted from the top end side of the lower box and can be pulled out from it. In the lower box, an auxiliary flap 1d foldable along an inside face of a side plate flap 1a which forms a side wall is provided. In the auxiliary flap 1d, connected holes 1e having nearly uniform opening cross sections in the relative moving direction between the flap 1d and the upper box 2 are formed. At the upper box 2, a connected arm 2e which is inserted into the connected holes 1e and passes through from the inside face of the auxiliary flap 1d to the outside face is provided. At the tip of the connected arm 2e, an engaging head 2f having a shape wider than the opening width of the connected holes 1e is provided. The length of the connected arm 2e is set to be shorter than the depth of the lower box 1.</p> |
