| 摘要 |
A synthetic resin container, in which the bottom part 4 having a bottom plate part 41 which is present at the center of the bottom part and a peripheral part 42 which is positioned at the periphery of the bottom plate part 41, in the peripheral part 42, a grounding part 422 having an inside slope 422a which rises outwardly of the container with the outer peripheral edge of the bottom plate part 41 being the start point and an outside slope 422b which continues to the side surface of the bottom part 4 is formed, and when a load is applied in the axial direction in the state where the container stands upright on the grounding surface G, the shape of the bottom part 4 changes reversibly such that the bottom plate part 41 is depressed inwardly to the container. As a result, it is possible to avoid deformation of a container into an unintended shape by buckling or the like even if a load is applied to a container in the axial direction, and to ensure the rigidity of a container against a load in the axial direction. |
| 主权项 |
1. A synthetic resin container for a non-carbonic drink comprising a mouth part, a trunk part and a bottom part, the bottom part having a bottom plate part which is present at a center of the bottom part and a peripheral part which is positioned at a periphery of the bottom plate part,
wherein the peripheral part includes a grounding part having an inside slope which rises outwardly of the container from an outer peripheral edge of the bottom plate part and an outside slope which continues to a side surface of the bottom part, and a plurality of groove parts extending radially outwardly from the outer peripheral edge of the bottom plate part and dividing the grounding part into a plurality of parts along a circumferential direction at substantially equal angular intervals, a bottom of each of the groove parts is formed along a curved surface together with two parallel ridgelines along an extending direction of the groove parts, the container includes a first virtual surface including an axis of the container or an axis of the bottom part and dividing the grounding part into two parts in the circumferential direction, and a second virtual surface including the axis of the container or the axis of the bottom part and dividing the groove part into two parts in the circumferential direction, in an overlapped virtual surface wherein the first virtual surface and the second virtual surface are rotated around the axis of the container or the axis of the bottom part to overlap with each other, when the container is placed upright on a grounding surface by defining that an intersection between the inside slope of the grounding part and the groove part is taken as A, an intersection between the outside slope of the grounding part and the groove part is taken as B, and an intersection between the grounding part and the grounding surface is taken as C, a straight line AB connecting the intersection A and the intersection B is inclined to leave from the grounding surface, from the intersection A to the intersection B, and an angle formed by the intersections A, C and B (∠ACB) is obtuse, the bottom plate part has a step part formed concentrically at a position nearer to a center than the outer peripheral edge of the bottom plate part, the peripheral part has a thickness less than that of the bottom plate part, and the position equivalent to the intersection B has a thickness of 0.2 to 0.3 mm, and when a load is applied in an axial direction in a state where the container stands upright on the grounding surface, a shape of the bottom part changes reversibly such that the bottom plate part is depressed inwardly to the container. |
