JP2004106910A5 - - Google Patents

Claims (10)

A bag-like body portion made of a flexible sheet, and a bottom portion made of a plastic molded body that closes the lower end opening of the bag-like body portion and has shape retention, It consists of a bottom wall panel and a peripheral side wall panel extending downward from the peripheral edge of the bottom wall, and the inner surface of the lower end opening of the bag-like body is thermally welded over the entire outer surface of the peripheral side wall panel. In a self-supporting bag-like container
The bottom wall panel has a curved shape with a recessed central portion, and when viewed from the top, one of the central axes orthogonal to each other is a long axis, and the other central axis is a short shorter than the long axis. As an axis, it has an axisymmetric shape with the major axis and the minor axis as symmetry axes,
The bottom wall panel has a first fold line formed of a thin portion extending in the long axis direction at a position overlapping with the long axis or symmetrical with each other with the long axis interposed therebetween. The first fold line extends to the lower end of the circumferential side wall panel, and
A second fold line made of a thin portion is formed over the entire periphery of the bottom wall panel,
A self-supporting bag-like container capable of folding the bottom portion into a flat shape along the first and second fold lines by inverting the center portion of the bottom wall panel upward.   The self-supporting bag-like container according to claim 1, wherein an upper end portion of the circumferential side wall panel is located inward of a lower end portion in a side cross section.   The self-supporting according to any one of claims 1 to 2, wherein the bottom wall panel is provided with reinforcing ribs extending in a direction parallel to the short axis with the long axis in between on both sides of the long axis. Sex bag-like container.   The self-supporting bag-like container according to any one of claims 1 to 3, wherein a projecting piece extending outward in the horizontal direction is provided at a lower end of the peripheral side wall panel.   5. The self-supporting bag-like container according to claim 4, wherein the protruding piece is formed over substantially the entire circumference of the lower end of the circumferential side wall panel except for both ends of the long axis to form a flange.   When viewed from the top, both ends of the short axis of the bottom wall panel are curved surfaces having a large radius of curvature, and corners having a small radius of curvature are formed at both ends of the long axis of the bottom wall panel. The self-supporting bag shape according to any one of claims 1 to 5, wherein the bottom wall panel has a lip shape as a whole, and the first fold line extends in a portion overlapping the long axis. container.   On the outer surface of the peripheral side wall panel, thin plate-like protrusions extending in the height direction and outward are formed at portions corresponding to the corner portions, and the bag-like body is formed on both surfaces of the thin plate-like protrusion. The self-supporting bag-like container according to claim 6, wherein the inner surface of the portion is welded.   The bottom wall panel has two long sides facing each other with a major axis interposed therebetween, and two short sides facing each other with a minor axis sandwiched therebetween, as viewed from above. The self-supporting bag-like container according to claim 1, wherein a corner portion is formed at a portion where the short side and the short side are continuous.   The first fold line extends to a position overlapping the long axis, and a third wall portion is formed of a thin portion extending from the corner portion of the long side and the short side, respectively, extending from the bottom wall panel and the side wall panel. The fold line is formed, and a third fold line extending from the corners of both ends of one short side to the bottom wall panel is connected to each other on the first fold line. Self-supporting bag-like container.   Two first fold lines are formed with the major axis in-between, and each of the first fold lines has a bottom wall panel that connects corners at both ends of one long side. The self-supporting bag-like container according to claim 8, which extends and has a minimum distance between the two first fold lines at the center.