| 摘要 |
PROBLEM TO BE SOLVED: To provide a synthetic resin vessel that is suppressed in shape change caused by thinning of the vessel under a requirement for thinning the vessel, in the square-bottled synthetic resin vessel whose corners are chamfered.SOLUTION: A flank 4 has chamfered parts 42 formed by chamfering side faces 41 and corners, vertical groove-shaped ridge line grooves 43 are formed at ridge lines which are formed in boundaries along height directions of the side faces 41 and the chamfered parts 42, and protruded ribs 43a are bridged between the opposing side faces forming the ridge line grooves 43. |
