| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a synthetic resin-made bottle having a step on a boundary between two barrels of different diameters which an increase the buckling strength of the step, and can prevent buckling deformation in the step caused by a longitudinal load applied to the bottle. <P>SOLUTION: The synthetic resin-made bottle 1 which is subjected to 2-axis stretching blow molding includes a mouth cylinder 2, a shoulder 3 which is gradually expanded from the mouth cylinder 2, a barrel 4 continuous from the shoulder 3, and a bottle 5. The barrel 4 includes a panel arrangement area 4a, and a maximum diameter area 4b having an outside diameter larger than that of the panel arrangement area 4a. The panel arrangement area 4a is formed of a regular polygonal shape composed of a plurality of flat walls, a decompression absorbing panel 8a is provided on each flat wall, and a column is provided between the adjacent decompression absorbing panels. A step 7 is formed in a boundary between the panel arrangement area 4a and the maximum diameter area 4b, and a plurality of ribs 10 for preventing the buckling deformation of the step 7 caused by the longitudinal load are formed between the step 7 and the column 9. <P>COPYRIGHT: (C)2012,JPO&INPIT |
