| 摘要 |
PROBLEM TO BE SOLVED: To prevent the upper bottom of an inside container from sinking owing to external or internal forces, by fixing the upper bottom thereof to the protection cover of a transportation and storage container and further, make thin the wall thickness of the upper bottom to reduce the weight of the container. SOLUTION: A pouring faucet 5 opened or closed by a screw cover 6 is formed at the upper bottom 4. A metallic protection cover 11 provided with a center opening 12 which is accessible to the pouring faucet 5, is detachably fixed to the external case 8. Two fixing holes 26, 27 are formed at the inclined parts 24, 25 between the central zone 19 of the upper bottom 4 of the inside container 2 and two swelled outside zones 20, 21. And slits 29, so corresponding to the fixing holes 26, 27 to connect them when the protection cover 11 is fixed to the upper side end of the vertical lattice bars 9 of the external case 8, are arranged at the recessed zone of the center opening 12 of the protection cover 11. In this case, plastic or metallic pins are inserted in the fixing holes 26, 27 projecting through the cover, of the inside container 2. |
