| 摘要 |
PROBLEM TO BE SOLVED: To provide a synthetic resin made bottle allowing stable gripping of the lower part of a nozzle even when the bottle is inverted.SOLUTION: A synthetic resin made bottle includes a nozzle part 2, a nozzle lower part 3 and an enlarged diameter part 4 connected to the nozzle lower part 3, increasing in diameter in the height direction and connected to a bottle body 5. The inclination angle α of the enlarged diameter part 4 is 3-45° to the shaft center C. The nozzle lower part 3 has an annular concave surface part 32 connected to the enlarged diameter part 4 and constituting, in the circumferential direction, a curved surface convex toward the inside of the bottle in the cross section including the shaft center C and a short cylindrical part 31 at the upper end of the annular concave surface part 32. The tangential line TLat the lower end of the annular concave surface part 32 in the cross section including the shaft center C is at an angle of 40-75° to the shaft center C. The lower end of the annular concave surface part 32 and the upper end of the enlarged diameter part 4 are connected in a terraced form. |
