< Topic >While maintaining strength, assure the light weight conversion and the retrenchment conversion of the material, pulling, it offers the casket which in order to become compaction possible, formed the burnup time when cremating.SolutionsThe surface is formed the box casket itself which is aperture with the cover 2 which blocks the surface of 1 and this casket itself 1. Both edge strips which parallel to the longitudinal direction of casket itself 1, in longitudinal section circular arc forma it forms with sheet 1of a convex buckling facing toward outside. Cover 2, it is desirable in longitudinal section circular arc forma to form in convex buckling facing toward above. In addition, it is good to form both edge strips which parallel to the longitudinal direction of casket itself 1, in the same buckling factor. The above-mentioned sheet 1a is installed in framework 3, framework 3 is formed providing with the interval containment board 3b which, in crossbar 3of a the top and bottom of parallel pair condition and this crossbar 3a in longitude state is laid out in orthogonal condition and the segment component 3c where in addition the outside is buckled for circular arc condition.< Choice figure >Drawing 1【課題】強度を維持できながら、軽量化や材料の節減化を図れ、ひいては火葬時の燃焼時間を短縮可能になるよう形成した棺を提供する。【解決手段】上面を開口している箱形の棺本体1と、この棺本体1の上面を閉塞する蓋2とで形成する。棺本体1の長手方向に沿った両側面を、縦断面円弧形に外側に向かって凸湾曲の薄板1aで形成する。蓋2を、縦断面円弧形に上側に向かって凸湾曲に形成するのが好ましい。また、棺本体1の長手方向に沿った両側面を、同じ湾曲率で形成するのが良い。上記の薄板1aは、枠組み3に取り付けられ、枠組み3は、平行一対状の上下の横木3aと、この横木3aに縦向き状態で直交状に配置されている間隔保持板3bと、また外面が円弧状に湾曲されている弓形部材3cとを備えて形成されている。【選択図】図1
