| 摘要 |
PROBLEM TO BE SOLVED: To provide a discharge device capable of moving a plug while sealing a gap between an inner peripheral surface of a container and the plug with pressure within a proper range as compared with a discharge device which expands a peripheral wall of a cylindrical plug itself in a radial direction with a gas sent in a container so as to come into contact with an inner peripheral surface of the container.SOLUTION: A discharge device comprises: a container which is cylindrical and has openings formed on both end sides so as to contain a liquid body; a plug which is arranged leaving a gap with an inner peripheral surface of the container; an annular body which is provided over an outer periphery of the plug and can elastically deform; and a sending-in part which is connected to one of the openings of the container, sending a gas in the container from the one opening to expand the annular body in a radial direction and closely contact it to the inner peripheral surface, and also moves the plug to the other opening side to discharge the liquid body from the other opening.SELECTED DRAWING: Figure 2 |
