| 摘要 |
PROBLEM TO BE SOLVED: To provide an inside plug capable of obtaining back suction easily and effectively.SOLUTION: A spouting device 1 comprises: a cylinder 2 filled with a paste material; a nozzle 7 provided at a tip part of the cylinder 2; a plunger 3 provided inside the cylinder 2 and movable back and forth inside the cylinder 2; an inside plug 4 for preventing leakage of the paste material, which is provided at the tip side of the plunger 3 and formed of an elastic material; a main seal part 22 which annularly protrudes outward in a radial direction of the cylinder 2 from a body part 21 of the inside plug 4, and closely contacts with the inner peripheral surface of the cylinder 2 at all times; and an auxiliary seal part 23 which is provided at an interval at the rear side of the main seal part 22, has an outer diameter slightly smaller than the inner diameter of the cylinder 2, and annularly protrudes outward in the radial direction of the cylinder 2 from the body part 21 of the inside plug 4. |
