DEVICE FOR TIGHTLY CLOSING NEEDLE PART OF LIQUID SAMPLE CONTAINER

PURPOSE:To prevent the leakage of liquid, by providing a tube body, which is fixed to the main body of a container so as to surround a needle, while is made to penetrate the main body of the container, and slidably positioning another tube body on said tube body through an elastic member. CONSTITUTION:An outer tube 12 is fixed to a sampling container 1 through a seat 16 so as to surround a needle 4, which is made to penetrate the main body of a container. An inner tube 13 is provided at the inner surface of the outer tube 12 so that the outer surface of the inner tube 13 is contacted with the inner surface of the outer tube 12 and inserted. In this constitution, even though the pressure in the gas part of the sampling container is increased, the pressure in a tightly closed space 18 and the internal pressure in the sampling container 1 become equal through a communicating hole 20. Therefore, liquid does not leak to the tightly closed space 18 through the needle because differential pressure does not occur.