| 摘要 |
PROBLEM TO BE SOLVED: To easily provide a stable and large book shelf by integrally connecting storage boxes arranged in a parallel state when the storage boxes having the same form are arranged in parallel right and left and/or back to back (on a back face side). SOLUTION: A connection structure of the storage box is characterized in that (1) a top plate member 4 of a storage box 1 comprises an inner side plate 15 and an outer side plate 20 which is fixed to this inner side plate 15, (2) a pair of engaging lock pieces 45 and 45 are combined inside of at least corner angle parts 18, 18 and 22, 22 on a diagonal line of the top plate member 4, (3) the engaging lock pieces can be projected from notches 25 and 25 for coming/going in/out of engaging lock pieces which are formed in the vicinity of a two faces joint part 24 of the top plate member 4 through an inner part space, (4) a hook part of a lock arm of the engaging lock 45 which is turned by a required angle is inserted in a notch 25 for coming/going in/out of an adjoining storage box and engaged with a corner part of a top plate member 4. |
