DOUBLE SIDE WALL BUILT-UP BOX

To provide a built-up box exhibiting excellent appearance quality by surely preventing a double side wall from being deformed irrespective of a stored article.SOLUTION: According to a double side wall built-up box 1 formed from double side walls around a bottom wall 20, the built-up box provided with a reinforcement member 5 for providing a bottom plate 50 covering the bottom wall 20, and side pates 51, 52 arranged in space parts 3, 4 of the double side walls formed on outside walls 21, 25 and inside walls 23, 27, comprises: a first side plate 51 arranged in right and left space parts 3 of the double side walls opposed and erected to the bottom plate 50, that is continuously provided via folding lines 54 on both sides opposed to the bottom plate 50; and a second side plate 52 arranged in front and rear space parts 4 of the double side walls adjacent to each other by bending the first side wall 51 in an erected state thereof, that is continuously provided via folding lines 45 on both the sides opposed to the first side plate 51.SELECTED DRAWING: Figure 1 【課題】収容物の状態にかかわらず二重側壁の変形を確実に防止して外観品質に優れた組立函を提供する。【解決手段】底壁２０の周囲に二重側壁を形成してなる二重側壁組立函１において、底壁２０を覆う底板５０と、外側壁２１・２５及び内側壁２３・２７にて形成される二重側壁の空間部３・４に配置される側板５１・５２とが設けられる補強部材５を具備してなり、底板５０の対向する両辺に折目線５４を介して連設され、底板５０に対して立設されて対向する二重側壁の左右の空間部３に配置される第一側板５１と、第一側板５１の対向する両辺に折目線４５を介して連設され、第一側板５１が立設された状態で折り曲げられて隣接する二重側壁の前後の空間部４に配置される第二側板５２と、を有してなる。【選択図】図１