| 摘要 |
PROBLEM TO BE SOLVED: To enable to simply form a lid part manually, and thereby, to avoid to use an automatic filling machine.SOLUTION: The lid part includes a connecting plate 30 continuously provided on the upper side of a back plate, a lid part front plate 22 continuously provided through a front linking piece folded back between the front plate 14, a lid part top plate 23 continuously provided on the upper side of the lid part front plate 22, a pair of lid part side plates 25 continuously provided with the lid part front plate 22 and continuously provided through side linking pieces folded back between respective side plates 13, and bending plates 26 and 29 respectively continuously provided on the upper sides of the lid part side plates 25. A pair of engaging pieces 30a are partitioned by notches on the connecting plate 30, and these engaging pieces 30a are respectively hooked and locked in fine holes 26a and 29a provided in respective bending plates 26 and 29, and on the lid part top plate 23, locking pieces 23a are projected at its tip, and this locking pieces 23a are inserted into slits formed in the boundary of the back plate and the connecting plate 30 to be locked there. |
