Abstract: 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.

Abstract: A synthetic resin container with a bottom structure in which forms, in the bottom portion thereof, an outer circumferential wall that is continuing from the body portion, an annular leg portion inclusive of a grounding portion and an inner circumferential wall, and a raised bottom portion positioned over the grounding portion on the inside of the inner circumferential wall of the leg portion. The raised bottom portion protrudes downward beyond the root portion where the leg portion is continues to the inner circumferential wall, a plurality of arcuate protuberances are formed in a spiral shape heading from the outer edge of the central portion of the raised bottom portion toward the outer circumferential side, and arcuate dents are formed among the arcuate protuberances that neighbor each other.

Abstract: A synthetic resin container with a bottom structure in which forms, in the bottom portion thereof, an outer circumferential wall that is continuing from the body portion, an annular leg portion inclusive of a grounding portion and an inner circumferential wall, and a raised bottom portion positioned over the grounding portion on the inside of the inner circumferential wall of the leg portion. The raised bottom portion protrudes downward beyond the root portion where the leg portion is continues to the inner circumferential wall, a plurality of arcuate protuberances are formed in a spiral shape heading from the outer edge of the central portion of the raised bottom portion toward the outer circumferential side, and arcuate dents are formed among the arcuate protuberances that neighbor each other.

Abstract: A synthetic resin container includes a bottom part having a bottom plate part present at the center of the bottom part and a peripheral part positioned at the periphery of the bottom plate part. The peripheral part includes a grounding part having an inside slope rising outwardly of the container with the outer peripheral edge of the bottom plate part being a start point, and an outside slope continuing to the side surface of the bottom part. When a load is applied in the axial direction in the state where the container stands upright on the grounding surface, the shape of the bottom part changes reversibly such that the bottom plate part is depressed inwardly to the container. Thus, it is possible to avoid deformation of the container into an unintended shape if a load is applied to the container in the axial direction, and to ensure the rigidity thereof.

Abstract: 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.