Storage container

Abstract

A storage container according to an aspect of the invention is provided with a tube-shaped storing portion formed of a resin having an extraction opening enabling a stored substance to be sucked in a center area on one end side, and a circular opening on the other end side, and a bag-shaped storing portion which is welded along the circular opening of the tube-shaped storing portion, enters inside the tube-shaped storing portion to be able to come into intimate contact with an inner surface of the tube-shaped storing portion in sucking through the extraction opening, and is formed of a thin film in the shape of a bag to be a non-independent body, where the tube-shaped storing portion changes in cross-sectional shape from a circular shape to an elliptical shape toward one end side from the other end side.

1 . A storage container comprising:
 a tube-shaped storing portion formed of a resin having an extraction opening enabling a stored substance to be sucked in a center area on one end side, and a circular opening on the other end side; and   a bag-shaped storing portion which is welded along the circular opening of the tube-shaped storing portion, enters inside the tube-shaped storing portion to be able to come into intimate contact with an inner surface of the tube-shaped storing portion in sucking through the extraction opening, and is formed of a thin film in the shape of a bag to be a non-independent body,   wherein the tube-shaped storing portion changes in cross-sectional shape from a circular shape to an elliptical shape toward the one end side from the other end side.   
     
     
         2 . The storage container according to  claim 1 , wherein in the bag-shaped storing portion, cut portions are formed in, corner portions on an end portion side opposite to an end portion welded to the tube-shaped storing portion. 
     
     
         3 . The storage container according to  claim 2 , wherein the tube-shaped storing portion has a curved portion such that the diameter decreases toward the extraction opening, and
 edge shapes of the cut portions formed in the bag-shaped storing portion are almost adapted to a shape of the curved portion.   
     
     
         4 . The storage container according to  claim 3 , wherein in an inner surface of the curved portion of the tube-shaped storing portion are formed protrusion portions that extend toward the extraction opening and that are arranged radially. 
     
     
         5 . The storage container according to  claim 1 , wherein a capacity of the tube-shaped storing portion is substantially the same as a capacity of the bag-shaped storing portion. 
     
     
         6 . The storage container according to  claim 1 , wherein the tube-shaped storing portion has a area that is formed in the same diameter over a predetermined length on the other end side having the circular opening, and the bag-shaped storing portion is welded to the outer surface of the area with the same diameter in the tube-shaped storing portion. 
     
     
         7 . The storage container according to  claim 6 , wherein a pair of protrusions protruding outward are formed at an interval of 180 degrees in the circumferential direction, in an area where the bag-shaped storing portion is welded, in the outer surface of the tube-shaped storing portion. 
     
     
         8 . The storage container according to  claim 1 , further comprising:
 a blockage preventing member detachable with respect to the extraction opening,   
       wherein the blockage preventing member has a tube portion, and the tube portion has a cut groove for defining a flow path with the bag-shaped storing portion entering inside the tube-shaped storing portion in sucking through the extraction opening. 
     
     
         9 . The storage container according to  claim 8 , wherein the tube portion has the substantially same axis length as a length in the axis direction of the extraction opening. 
     
     
         10 . The storage container according to  claim 8 , wherein the cut groove has a function of facilitating extraction, through the cut groove, of the stored substance remaining in the vicinity of a bottom edge of the bag-shaped storing portion in a stage when an inner surface of the bag-shaped storing portion comes into intimate contact with the inner surface of the tube-shaped storing portion in sucking and a suction force does not act on the bag-shaped storing portion. 
     
     
         11 . The storage container according to  claim 1 , wherein the extraction opening has a plug with a screw. 
     
     
         12 . A storage container comprising:
 a tube-shaped storing portion formed of a resin having an extraction opening enabling a stored substance to be sucked in a center area on one end side, and a circular opening on the other end side; and   a bag-shaped storing portion which is welded along the circular opening of the tube-shaped storing portion, enters inside the tube-shaped storing portion to be able to come into intimate contact with an inner surface of the tube-shaped storing portion in sucking through the extraction opening, and is formed of a thin film in the shape of a bag to be a non-independent body,   wherein the bag-shaped storing portion has a length in the range of 90% to 110% relative to a storing length in the longitudinal direction of the tube-shaped storing portion.