PROBLEM TO BE SOLVED: To provide an assembly octagonal casket made of cardboard which structurally keeps a sufficient strength after the assembly not to add a reinforcing member afterward and creates an exclusive atmosphere with piquancy by making the casket into a three-dimensional octagon.SOLUTION: A main body A of the casket is formed into an octagonal box shape which comprises an octagonal bottom plate part 1 having slanting sides at four corners of a rectangle, side plate parts 2 rising on both sides, end plate parts 19 rising on the front and back sides, and chamfering plate parts 4 rising on the slanting sides and has an opened upper surface. Inward folded plate parts are superposed on respective upper sides of the side plate parts, the end plate parts 19, and the chamfering plate parts to integrate. A lid body B is formed into an octagonal, shallow box shape which has the bottom up and an opened lower surface and comprises a rectangular top plate part 15, slanting plate parts 16, triangular slanting plate parts 17 between the slanting plate parts 16, the side plate parts 2, the end plate parts 3, and the chamfering plate parts 4. The inward folded plate parts 23 are superposed on respective lower sides of the side plate parts, the end plate parts 3, and the chamfering plate parts 4 to integrate.COPYRIGHT: (C)2008,JPO&INPIT【課題】補強部材を事後的に付加する必要のない程に組み立て後の強度を構造的に保持し得ると共に立体感がある八角形状とすることで興趣に富む高級感を醸出し得る八角形状の段ボール紙製の組み立て用棺桶を提供する。【解決手段】棺本体Aは長方形の四隅に傾斜辺をもつ八角形状の底板部1、その両側辺に起立する側板部2、その前後辺に起立する妻板部19及び傾斜辺に起立する面取り板部4とからなる上面開口の八角形状の箱型で、上記側板部、妻板部19、面取り板部の各上辺に内側折返し板部を重合一体化すると共に、蓋体Bは長方形の天板部15、傾斜板部16、該傾斜板部16相互間の三角形状傾斜板部17、側板部2、妻板部3、及び、面取り板部4とからなる下面開口の八角形状の浅い下向き箱型で、上記側板部、妻板部3、及び、面取り板部4の各下辺に内側折返し板部23を重合一体化する。【選択図】図6
