Double walled fluid-storing container

Abstract

A fluid-storing container includes an inner container ( 10 ), an outer container ( 20 ) enclosing the inner container ( 10 ), a joined member ( 30 ) joining the inner container ( 10 ) and the outer container ( 20 ), and a valve member ( 40 ) for opening/shutting off a discharge opening from the exterior. The joined member ( 30 ) joins the inner container ( 10 ) and the outer container ( 20 ) in such a way that that an inner space ( 50 ) is formed between the inner container ( 10 ) and the outer container ( 20 ), and a flow path enabling air to pass through between the exterior and the inner space ( 50 ) is formed.

1 . A tubular fluid-storing container comprising: 
 an internal container having a fluid-storing portion for storing a fluid, a neck opening portion, and a shoulder portion around the neck opening portion;    an outer container being capable of elastically restoring its shape, enclosing the inner container, and having an outer opening portion through which the neck opening portion of the inner container is inserted, wherein an inner space is formed between the inner container and the outer container; and    a joined member having a fluid-discharge opening, being engaged with the neck opening portion of the inner container to connect the fluid-discharge opening and the neck opening portion, and pressing the outer opening portion against the shoulder portion of the inner container where an air path is formed through which air passes between the inner space and the exterior.    
   
   
       2 . The tubular fluid-storing container according to  claim 1 , wherein the joined member comprises an inner joined portion engaged with the neck opening portion of the inner container, and an outer joined portion pressing the outer opening portion against the shoulder portion of the inner container.  
   
   
       3 . The tubular fluid-storing container according to  claim 2 , wherein the outer opening portion of the outer container has at least one slit constituting the air path.  
   
   
       4 . The tubular fluid-storing container according to  claim 3 , wherein the outer opening portion of the outer container having the at least one slit has an annular step in contact with a surface of the shoulder portion of the inner container.  
   
   
       5 . The tubular fluid-storing container according to  claim 3 , wherein the at least one slit is comprised of two or more slits arranged at equal intervals.  
   
   
       6 . The tubular fluid-storing container according to  claim 3 , wherein the slit extends outward from an inner periphery of the outer opening portion to a position slightly outside the outer joined portion of the joined member to pass air through the slit.  
   
   
       7 . The tubular fluid-storing container according to  claim 2 , wherein the outer opening portion of the outer container has an annular convex edge portion, with which the outer joined potion of the joined member is engaged.  
   
   
       8 . The tubular fluid-storing container according to  claim 7 , wherein the outer opening portion including the annular convex edge portion of the outer container has at least one slit constituting the air path.  
   
   
       9 . The tubular fluid-storing container according to  claim 7 , wherein the annular convex edge portion of the outer opening portion of the outer container is fitted to a bottom of the neck opening portion.  
   
   
       10 . The tubular fluid-storing container according to  claim 2 , wherein the inner joined portion and the outer joined portion of the join member are formed concentrically in an axial direction, wherein an inner wall of the inner joined portion is engaged with the neck opening portion, and a lower end of the outer joined portion presses the outer opening portion of the outer container.  
   
   
       11 . The tubular fluid-storing container according to  claim 2 , wherein the outer opening portion of the outer container has an annular convex edge portion, with which the outer joined potion of the joined member is engaged.  
   
   
       12 . The tubular fluid-storing container according to  claim 2 , wherein the neck opening portion of the inner container is provided with male threads, and the inner joined portion of the joined member is provided with female threads with which the male threads are engaged.  
   
   
       13 . The tubular fluid-storing container according to  claim 1 , wherein an end portion opposite to the neck opening portion of the inner container, and an end portion opposite to the outer opening portion of the outer container are welded.  
   
   
       14 . The tubular fluid-storing container according to  claim 1 , wherein the neck opening portion of the inner container is provided with a valve member disposed inside the neck opening portion.  
   
   
       15 . The tubular fluid-storing container according to  claim 14 , wherein the valve member is deformed to open a passage of the fluid stored in the fluid-storing portion when a pressure inside the fluid-storing portion increases.  
   
   
       16 . The tubular fluid-storing container according to  claim 14 , wherein the fluid-discharge opening of the joined member is provided with ribs which support the valve member.  
   
   
       17 . The tubular fluid-storing container according to  claim 1 , wherein the joined member has a lid portion for closing the fluid-discharge opening.