| 摘要 |
<p>PURPOSE:To prevent wrinkles from being created on leg parts by the inside pressure by providing grooves which are recessed toward the inside of a container and located in the vicinity of leg rising parts leading toward the body of the container. CONSTITUTION:A pressure-resistant container has four legs 2 and its bottom is divided into four equal parts by four trough beds. Grooves 3 stretching in the circumferential direction are provided in the vicinity of leg rising parts where ridges of the legs 2 rise toward the end of the body of the container. The grooves 3 serve as reinforcing beads, and prevent leg side faces 1 from being deformed and from wrinkling when the leg side faces 1 are compressed. Wrinkles are created along the height of the legs 2 when the bottoms of the troughs are expanded by the inside pressure, causing the leg side faces 1 to be compressed. When the grooves 3 which are recessed toward the inside of the container and run in the circumferential direction are provided near the feet of the legs, the grooves serve as reinforcing beads and prevent wrinkles from being created. When grooves are provided along the height of the legs, wrinkles are absorbed by the grooves and prevented from being created along the height of the legs except along the grooves. Therefor, wrinkles are prevented from being unevenly created.</p> |
