JP2007022546A - Liquid container - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid container which ensures the high sealing performance of a mouth implement without use of a cap, prevents a content leak, and is easy to handle. <P>SOLUTION: The liquid container comprises a filling mouth implement 5 having a filling opening 4 into which a filling means can be inserted and a cylindrical outer wall 9 formed around the filling opening 4 and a discharge mouth implement 7. The discharge mouth implement 7 includes an annular fitting means 21 fitted on a projecting edge 11 of the cylindrical outer wall 9 of the filling mouth implement 5, engaged unremovably at least with the outer periphery of the projecting edge 11 of the cylindrical outer wall 9, and fitted closely to the inner periphery of the projecting edge 11 to create a sealed state not allowing a liquid to go around to reach the outer periphery side and closing a liquid channel via the filling opening 4, when the fitting means 21 is fitted on the projecting edge 11, by fitting the projecting edge 11 to the fitting means 21 to fix the discharge mouth implement 7 to the filling mouth implement 5. The discharge mouth implement 7 has a thin-walled portion 6 located at a position corresponding to that of the filling opening 4, which thin-walled portion 6 can be pierced open by a suction means for sucking up the liquid filling a container body. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a liquid container that can be filled with a liquid and can also be aspirated by a suction means such as a piercing nozzle to suck the liquid.

Conventionally, as a container containing liquid so that it can be stabbed and sucked up, for example, there is a bottle for injection solution, and in this bottle for injection solution, a thin rubber film that can be pierced and passed through the injection needle is provided in the bottle mouth. The rubber film is stretched around the bottle mouth by caulking and fixing it around the bottle mouth with aluminum material, or the rubber film is stretched around the bottle mouth with a screwed cap with a through hole in the center. ing.
On the other hand, there is a liquid container for storing ink of a copying machine in a container corresponding to a device for taking in liquid by a suction mechanism having a relatively thick nozzle for suction, and also in this liquid container for storing ink In order to easily connect the liquid container and the liquid container, an attempt has been made to develop a structure that can accommodate insertion of filling means and suction means, and a nozzle can be pierced and opened inside the ink outlet opening provided in the container body. A device has been proposed in which an insert having a diaphragm is attached (see Patent Document 1).
JP 2003-103893 A

As a liquid container for storing ink in a general office copying machine, a flow path is created by piercing the nozzle in consideration of the user's trouble of loading a new liquid container filled with ink to the ink suction mechanism of the copying machine. There are the following configurations that can be formed.
As shown in FIG. 9, the liquid container containing the ink is obtained by attaching a mouthpiece d having an insertion hole c through which the nozzle b on the suction mechanism side can pass through the container body a. And in the mouthpiece d, the insertion hole c is located in the center of the back surface side of the cylindrical site | part e made larger diameter than the diameter of the insertion hole c, and the circumference | surroundings of the insertion hole c were made into the cyclic | annular site | part f. Was structured.
In such a liquid container, ink is filled in the container main body a from the insertion hole c in advance, and then the closed body g capable of being pierced and opened by the nozzle in the space surrounded by the cylindrical part e is provided with the cylindrical part e. Is pushed to a position exceeding an undercut h formed on the inner side of the lip member, and the closing body g against the annular portion f is pressed to cover the insertion hole c. And what attached the cap j provided with the recessed part i which enters the space enclosed by the cylindrical part e to the mouthpiece d so that the said closure g can be pressed down is shipped for general users as a product. ing.
In this liquid container, a mouth layout with the mouth facing sideways on the lower end side of the container on the side surface of the container body so that ink with high viscosity is easily sucked, or the mouthpiece facing downward on the bottom surface of the container body It may be a mouthpiece layout.

  In the above copying machine, after the user removes the cap, the container is placed in the filling portion of the copying machine and the loading unit is operated. A nozzle in the suction mechanism is pierced to form a flow path capable of sucking ink.

However, this liquid container has the following problems.
First, in order to minimize the residual ink usage in the container, a flexible film material is used to reduce the internal volume of the container body as the ink is sucked. If the container body is pressed strongly during handling after removing the cap in the container, the ink that is the contents may leak out by pushing the closure body through the insertion hole in connection with the fact that the closure body is no longer supported by the recess of the cap There was sex.
Next, there is a concern that the pressing force with only the undercut that presses the closing body against the annular part cannot prevent leakage of liquid with high fluidity. In other words, in this configuration, the content is an emulsion such as ink, and when this component appears to decompose, the low-viscosity component may be separated, and the low-viscosity and high-fluidity component is surely leaked. To prevent this, the pressing force of the closing body due to undercutting is insufficient.

  There was also a problem of unauthorized refilling. Since the liquid container of the product was closed by pushing the closure body over the undercut as described above, the regular closure body (opened) was removed from the mouthpiece of the used liquid container, It is highly likely that an improper sheet will be inserted and the insertion hole is closed after improper filling.In such a liquid container, the ink in the contents may be oxidized or dried due to incomplete insertion hole closure. To do. Then, setting such illegally refilled liquid container in the copying machine may cause trouble on the copying machine side.

Next, in this liquid container, as described above, it is conceivable to fill the contents from the insertion hole and to heat seal the outer peripheral portion of the closing body and the annular portion around the insertion hole after the closing body is pushed in. However, when filling the contents, the contents may adhere to the annular part, and even if a closed body is placed and heat sealed in this state, the sealing strength is extremely low, and the leakage of the contents cannot be prevented. was there.
In addition, in order to fill the container body from other than the mouthpiece, it must be configured so that it can be reliably closed with a simple seal, so that the entire liquid container becomes bulky, the container body film material, etc. Or the remaining amount of ink remaining in the liquid container in a state where the use has been terminated due to the inability to suck.
The next problem is that when the liquid container is loaded in the copying machine, the user performs loading with the cap attached, and the nozzle is damaged. That is, since it has a cap shape having a concave portion (a portion that supports the closing body), the user mistakes the concave portion as a nozzle insertion portion and loads the cap with the cap attached. For this reason, it has been desired to prevent the trouble of loading with a cap.
Therefore, in view of the above circumstances, the present invention has an object to ensure a high sealing property in the mouthpiece without a cap, obtain a liquid container that is easy to handle without leakage of contents, and has a nozzle in the cap. The purpose is to prevent conventional accidents and fraudulent filling.

The present invention has been made in consideration of the above problems, and is a liquid container comprising a container body and a mouthpiece device disposed on the container body,
The mouthpiece device has a filling hole having a cylindrical outer wall that has a filling hole into which a filling means for filling a liquid into the container body can be inserted, and protrudes from the periphery of the filling hole in a direction opposite to the filling means insertion direction. And an annular fitting means into which the protruding end edge of the cylindrical outer wall of the filling mouth is fitted, and is attached and fixed to the filling mouth, and is stabbed by a suction means for sucking the liquid filled in the container body. A discharge opening that closes the liquid flow path through the filling hole by positioning a thin-walled portion corresponding to the filling hole, and the protruding end of the cylindrical outer wall of the filling opening includes the protruding end A locking convex portion is provided over the outer peripheral surface of the edge, a seal surface portion is provided over the inner peripheral surface of the protruding end edge, and the fitting means in the discharge port includes the protruding end. A locking projection that detachably engages with the locking projection on the edge; and Providing a liquid container, characterized in that a seal surface portion is provided that is in close contact with the seal surface portion of the protruding end edge and seals the liquid to the outer peripheral surface side of the protruding end edge so as not to wrap around. The above-described problems are solved.

Another invention is a liquid container comprising a container body and a mouthpiece device disposed on the container body,
In the mouthpiece device, a filling hole into which a filling means for filling a container body with a liquid can be inserted is opened on a protruding end side of a cylindrical portion protruding in a direction opposite to a filling means insertion direction. A filling mouth having a cylindrical outer wall projecting in the opposite direction of the filling means insertion direction so as to surround the cylindrical portion from the periphery, and a cylindrical fitting fitted between the cylindrical outer wall and the cylindrical portion of the filling mouth The fitting means is provided and fixed to the filling mouthpiece by fitting the fitting means between the cylindrical outer wall and the cylindrical portion, and can be pierced and opened by the suction means for sucking the liquid filled in the container body. A discharge port that closes the liquid flow path through the filling hole by positioning the thin portion corresponding to the filling hole, and the fitting means of the discharge port includes an outer periphery at the edge in the filling means insertion direction. A locking projection is provided across the surface and A sealing surface portion is provided over the inner peripheral surface at the edge in the means insertion direction, and the engagement means is locked to the fitting means corresponding portion on the inner peripheral surface of the cylindrical outer wall of the filling mouthpiece. The projection is provided with a locking projection that is detachably engaged, and the cylindrical outer wall is in close contact with the sealing surface portion of the fitting means at the portion corresponding to the fitting means on the outer peripheral surface of the cylindrical portion of the filling mouthpiece. The liquid container is provided with a seal surface portion that seals the liquid from flowing to the side, and the liquid container is provided to solve the above-described problems.

And in the said invention, the thin part of the said discharge | outlet opening device closes the insertion hole opened in the discharge | release opening | mouth corresponding to the said filling hole with the sheet | seat which contains the film formed at least biaxially. Can be.
Moreover, in the said invention, the thin part of the said discharge | outlet opening tool shall be thinned by compressing the corresponding position of the said filling hole in the said discharge | release opening | mouth after injection molding, and shall be integrated with the discharge-outlet body. It is possible.

(Effects of claims 1 and 2)
According to the first and second aspects of the invention, the conventional cap is not used, so that resource saving can be achieved and the suction means generated when the liquid container is loaded into the suction mechanism with the nozzle while the cap is attached as described above. A certain nozzle can be prevented from being damaged.
Since the liquid container has a product form that does not have a cap, when the liquid container is to be loaded into the copying machine as a container that stores ink used in the copying machine, the contents are given to the general user. This leads to a form of use where the contents are aspirated to the last possible amount without causing the need to unnecessarily remove the remaining containers. As a result, the contents can be used economically and the disposal of the liquid container in a state where a large amount of contents remain can be prevented. Furthermore, since the product form does not have a cap, an empty container whose contents have been used cannot be reusable because the inside of the container cannot be maintained, and is reliably handled as waste.
Therefore, the equipment side which was easy to occur in the improper use form that removes the liquid container from the copier etc. and refills the liquid container after a period of time, or the illegal use form of the container that is illegally filled in the used empty container Trouble, that is, a problem that occurs when the solidified contents are sucked into the device can be prevented.
Further, by attaching the discharge port to the filling port, the liquid flow path to the outside of the container through the filling hole of the filling port is closed, and the contact portion between the filling port and the discharge port, that is, fitting Since it is easy to introduce a technique such as setting the shape so as to increase the contact pressure in the joint means, it is possible to ensure high sealing performance for closing the liquid flow path through the filling hole. Therefore, even if a part of the contents adheres and remains at the position where the filling mouthpiece and the discharge mouthpiece come into contact with each other when filling the contents, unlike the heat seal, the sealing performance in the unopened state of the thin portion It has an excellent effect such as not impairing.

(Effect of claim 3)
According to the third aspect of the present invention, it is possible to prevent the thin portion from being opened by the stab of the suction means such as the nozzle, and to prevent the cut piece from coming out of the opened insertion hole and entering the container main body.
(Effect of claim 4)
According to the fourth aspect of the present invention, the discharge port can be manufactured efficiently, and the manufacturing cost of the liquid container can be reduced.

Next, the present invention will be described in detail based on the embodiment shown in FIGS.
In the figure, reference numeral 1 denotes a liquid container. The liquid container 1 is a container main body 2 made of a flexible and heat-sealable film material, and a mouthpiece device attached to the lower end side of the side surface of the container main body 2 while being offset. 3. The liquid container 1 is a container for storing a relatively high-viscosity content such as a liquid such as ink, and after filling the content through the mouth device 3, the mouth device 3 is closed, and The liquid container 1 is stored like a container loading unit equipped with an ink suction mechanism of a copying machine, and the mouthpiece device 3 is connected to the mouthpiece device 3 by connecting to the suction mechanism for sucking the contents. The mouthpiece device 3 is opened so that the contents can be sent out.

  The mouthpiece device 3 corresponding to the filling by the filling means and the suction by the suction means is a filling mouth 5 having a filling hole 4 through which the filling means can pass as shown in FIG. A discharge port 7 having a thin portion 6 that can be pierced and opened by a nozzle that is a suction means of the mechanism, and the liquid flow path through the filling hole 4 is closed by the discharge port 7 after filling the contents. In addition, the thin-walled portion 6 is broken by piercing by the suction means, and a liquid flow path that can be sucked is obtained by passing the suction means through the filling hole 4 and the thin-walled portion 6. Therefore, the liquid container 1 is in the form of a product in which the liquid flow path is closed after filling the contents, and as will be described later, a reliable closure is ensured and a cap for the mouthpiece device 3 is not required.

  The filling mouthpiece 5 is formed from a material that can be fused into a bottomed cylindrical shape that is open at one end, and has the filling hole 4 that is opened at the center of the back surface portion 8 as shown in FIG. The outer cylinder portion 10 is formed by a cylindrical outer wall 9 that protrudes in the opposite direction of the filling means insertion direction X (see FIG. 1) and continues in the circumferential direction. The projecting end edge 11 of the cylindrical outer wall 9 has a stepped diameter that is larger than the outer cylinder portion 10, and a mouth holding presser 12 at the time of filling / discharging is radially provided around the outer periphery of the step portion position. In addition, a protruding protrusion 13 is provided on the outer peripheral surface of the protruding end edge 11 over the entire circumference, and the inner peripheral surface of the protruding end edge 11 extends over the entire circumference. A seal surface portion 14 is provided.

As shown in the drawing, a flange 15 projecting in the radial direction is provided on the outer peripheral surface of the outer cylindrical portion 10 formed of the cylindrical outer wall 9 at a position near the outer cylindrical portion 10. The stepped flange 15 is fused to the main body sheet 16 of the container main body 2 at the position of the outer peripheral portion, whereby the filling port 5 is fixed to the container main body 2.
Furthermore, a plurality of ribs 17 projecting in the filling means insertion direction are integrally provided on the inner surface of the container body 2 in the back surface portion 8. The plurality of ribs 17 are provided to secure a flow path to the filling hole 4 side so that the opposing main body sheet does not adhere to the back surface portion 8 when the contents are sucked.

  The other discharge port 7 is a cylindrical portion having a bottom with an open end inserted into the inner region of the outer tube portion 8 of the filling port 5 as a body portion 18, and a rear surface portion of the body portion 18. In the center of 19, the thin portion 6 is provided adjacent to the filling hole 4. The thin wall portion 6 can be pierced and opened by suction means such as a nozzle, and the discharge port 7 is injected with the selected synthetic resin material, and the piece corresponding to the thin wall portion is moved and compressed while the resin is not solidified. And is integrated with the mouthpiece body of the discharge mouthpiece 7.

  Further, as shown in the drawing, the discharge port 7 has an annular shape around the outer periphery of the tapered portion 20 through the tapered portion 20 that is opened to the opening side of the body portion 18 and allows the suction means to be guided. The fitting means 21 is provided integrally. The fitting means 21 includes a folded shape portion 22 having a substantially bowl-shaped cross section that extends in the radial direction outward after the taper portion 20 and extends in the filling means insertion direction, and the folded shape portion 22. And a seal ring 23 that extends from the outer peripheral surface of the tapered portion 20 where the base end of the taper portion is located in the shape of a tongue-shaped cross section in the direction of filling means insertion. And the latching convex part 24 which engages with the latching convex part 13 of the said protrusion end edge 11 in the filling mouthpiece 5 detachably over the inner peripheral surface of the end part by the side of the filling means insertion direction of the said folding shape part 22. Are integrally provided, and the locking projection 13 and the locking projection 24 are mutually connected by fitting the protruding end 11 into the fitting means 21 as shown in FIG. Further, the seal surface portion 23 a on the outer peripheral surface of the seal ring 23 is in close contact with the seal surface portion 14 extending around the inner peripheral surface of the projecting end edge portion 11.

By fitting the protruding end 11 of the filling mouth 5 into the fitting means 21 of the discharge mouth 7, the discharge mouth 7 is attached and fixed to the filling mouth 5, and further protrudes from the seal surface portion 23 a of the seal ring 23. When the sealing surface portion 14 of the end edge portion 11 is in close contact, the contents stored in the container body pass through the filling port 4 and the body portion 18 of the discharge port 7 and the outer tube portion 10 of the filling port 5. The liquid that has flowed in between is reliably prevented from flowing to the outer peripheral surface side of the protruding end edge 11. Note that a protrusion 26 serving as an auxiliary liquid stop is located on the protruding end edge side of the top portion 25 (a portion continuing in a radial direction from the tapered portion) in the folded shape portion 22, and the protruding edge 11 It is in contact with the end face.
Thus, the discharge port 7 is attached and fixed to the filling port 5 by fitting the protruding edge 11 into the fitting means 21, and the liquid flow path via the filling hole 4 is closed. There is no need to use it, and liquid leakage is reliably prevented.

When the contents filled in the liquid container 1 are sucked, the liquid container 1 is placed so that the mouthpiece device 3 corresponds to the nozzle as the suction means in the container loading portion in the apparatus such as a copying machine as described above. After setting, for example, the mouthpiece device 3 is applied to the nozzle by an operation on the device side, and the nozzle pierces and opens the thin portion 6 of the discharge mouth piece 7 so as to enter the thin portion 6 and the filling hole 4. do it. As a result, the contents can be sucked.
The thin portion 6 into which the nozzle serving as the suction means enters is located in the back surface portion 19 of the body portion 18 of the discharge port 7 and is away from the taper portion 20 in the filling means insertion direction. Since it is positioned as the front surface of the discharge port 7, the advance of the nozzle is reliably guided to the thin-walled portion 6, and is properly pierced and opened.

  Next, FIGS. 5 to 7 show a second embodiment. FIGS. 5 and 6 show the filling device 5 and the discharge device 7 constituting the mouth device 3 in a separated state. ing. As shown in the figure, the filling mouthpiece 5 has a cylindrical portion 27 projecting in the center position of the back surface portion 8 of the outer cylinder portion 10 which is open at one end and in the opposite direction to the filling means insertion direction. The filling hole 4 is opened at the side, and the cylindrical outer wall 9 is projected from the periphery of the back surface portion 8 so as to surround the cylindrical portion 27 in the direction opposite to the filling means insertion direction, thereby forming the outer cylindrical portion 10. The protruding end edge 28 of the outer wall 9 is first opened in a tapered shape. Further, as in the above-described example, a mouth holding collar 12 and a flange 15 are provided on the outer peripheral surface of the outer cylindrical portion 10, and a rib 17 is provided on the inner side of the container body at the proximal end of the flange 15. It arrange | positions so that the cylinder part 10 may be enclosed.

  Further, in the filling mouthpiece 5, a locking convex portion 29 is provided so as to project around the inner peripheral surface of the cylindrical outer wall 9 corresponding to the protruding height position of the cylindrical portion 27, and the cylindrical wall of the cylindrical portion 27. 30 is configured as a seal ring. In addition, in order to ensure the push-in operability when attaching the discharge port device 7 which will be described later, the height position of the locking projection 29 is not aligned with the height position of the flange 15. The flange 15 is provided at a position away from the vertical position in a direction opposite to the filling means insertion direction.

On the other hand, the discharge port device 7 is provided in a substantially disk shape, and has a fitting means 32 composed of a cylindrical wall 31 protruding from the periphery of the back surface toward the filling means insertion direction. The fitting means 32 is fitted between the outer cylinder portion 10 and the cylindrical portion 27 of the filling mouthpiece 5, and is a locking protrusion protruding radially around the outer peripheral surface of the cylindrical wall 31 on the protruding end side. The portion 33 and the engaging convex portion 29 of the cylindrical outer wall 9 are engaged with each other in a non-removable manner, and a seal surface portion 34 is provided around the inner peripheral surface of the cylindrical wall 31. 34 is in close contact with the seal surface portion 35 formed by the outer peripheral surface of the cylindrical wall 30 serving as the seal ring. Due to the close contact of the sealing surface 35 of the cylindrical wall 30 with the sealing surface 34 of the cylindrical wall 31, the contents of the container main body are prevented from going around the cylindrical outer wall 9. A thin portion 6 that can be pierced by the suction means is provided at a position corresponding to the filling port 4, and the discharge port 7 is arranged so as to cover the filling port 4, and the fitting means The liquid flow path via the filling port 4 is closed by being fixedly attached to the filling port 5 by 32.
In the same manner as in the above example, the thin portion 6 of the discharge port 5 is also injected with the selected synthetic resin material, and the piece corresponding to the thin portion is moved and compressed while the resin is not solidified. Thus, the thickness is reduced and integrated with the thick mouthpiece body of the discharge mouthpiece 7.

  In the discharge mouthpiece 5, the cylindrical wall 31 protrudes from a thick mouthpiece body, and a locking projection 33 is provided around the outer peripheral surface of the protruding edge of the cylindrical wall 31. However, the locking projection 29 of the cylindrical outer wall 9 that is detachably locked to the locking projection 33 does not contact the thick mouth body of the discharge port 7 and contacts the cylindrical wall 31. The cylindrical wall 31 is pressed in the center direction so as to ensure a tight contact state between the seal surface portion 35 and the seal surface portion 34.

  In the above embodiments, the thin wall portion 6 of the discharge mouthpiece 7 has been described as being integrated with the mouthpiece body of the discharge mouthpiece 7, but the present invention is not limited to this. For example, in the case of the discharge port 7 in the second example, as shown in FIG. 8, at least two insertion holes 36 opened at positions corresponding to the filling holes 4 at the time of forming the discharge port 7 are provided. It may be closed by a sheet 37 containing a single layer of an axially stretched film, and when it is pierced and opened by insertion of a suction means, the sheet 37 has a biaxially stretched film and is torn. Thus, it is possible to prevent the cutting waste from entering the container body side.

1 shows a first example of a liquid container according to the present invention. It is explanatory drawing shown in the state which isolate | separated the mouthpiece apparatus in a 1st example. It is explanatory drawing shown in a cross section in the state which isolate | separated the mouthpiece apparatus in a 1st example. It is explanatory drawing which shows the mouthpiece apparatus in a 1st example in a cross section. It is explanatory drawing shown in the state which isolate | separated the mouthpiece apparatus of the 2nd example. It is explanatory drawing shown in a cross section in the state which isolate | separated the mouthpiece apparatus in a 2nd example. It is explanatory drawing which shows the mouthpiece apparatus in a 2nd example in a cross section. It is explanatory drawing which shows the other example of a discharge port tool in a cross section. It is explanatory drawing which shows a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Liquid container 2 ... Container main body 3 ... Mouth device 4 ... Filling hole 5 ... Filling port 6 ... Thin part 7 ... Discharge port 9 ... Cylindrical outer wall 10 ... Outer cylinder part 11 ... Projection edge 13 ... Locking Convex part 14 ... Seal surface part 18 ... Body part 19 ... Back face part (of the discharge port 7) 20 ... Taper part 21 ... Fitting means 22 ... Folding shape part 23 ... Seal ring 23a ... Sealing surface part 24 ... Locking convex part 27 ... Cylindrical portion 28 ... Projecting edge portion 29 ... Locking convex portion 30 ... Cylinder wall 31 ... Cylinder wall 32 ... Fitting means 33 ... Locking convex portion 34 ... Seal surface portion 35 ... Seal surface portion 36 ... Insertion hole 37 ... Sheet

Claims (4)

A liquid container comprising a container body and a mouthpiece device disposed in the container body,
The mouthpiece device has a filling hole having a cylindrical outer wall that has a filling hole into which a filling means for filling a liquid into the container body can be inserted, and protrudes from the periphery of the filling hole in a direction opposite to the filling means insertion direction. And an annular fitting means into which the protruding end edge of the cylindrical outer wall of the filling mouth is fitted, and is attached and fixed to the filling mouth, and is stabbed by a suction means for sucking the liquid filled in the container body. A thin-walled portion that can be opened is positioned corresponding to the filling hole, and includes a discharge port device that closes the liquid flow path through the filling hole,
The protruding end edge of the cylindrical outer wall of the filling mouth is provided with a locking convex portion over the outer peripheral surface of the protruding end edge, and with a seal surface portion over the inner peripheral surface of the protruding end edge. And
In addition, the fitting means in the discharge port includes a locking projection that is detachably engaged with the locking projection of the protruding end edge, and a protruding end that is in close contact with the seal surface portion of the protruding end edge. A liquid container, comprising: a seal surface portion that seals the liquid from wrapping around the outer peripheral surface of the edge. A liquid container comprising a container body and a mouthpiece device disposed in the container body,
In the mouthpiece device, a filling hole into which a filling means for filling a container body with a liquid can be inserted is opened on a protruding end side of a cylindrical portion protruding in a direction opposite to a filling means insertion direction. A filling mouth having a cylindrical outer wall projecting in the opposite direction of the filling means insertion direction so as to surround the cylindrical portion from the periphery, and a cylindrical fitting fitted between the cylindrical outer wall and the cylindrical portion of the filling mouth The fitting means is provided and fixed to the filling mouthpiece by fitting the fitting means between the cylindrical outer wall and the cylindrical portion, and can be pierced and opened by the suction means for sucking the liquid filled in the container body. The thin-walled portion is positioned corresponding to the filling hole, and includes a discharge port device that closes the liquid flow path through the filling hole,
The fitting means of the discharge port is provided with a locking projection over the outer peripheral surface at the end in the filling means insertion direction, and over the inner peripheral surface at the end in the filling means insertion direction. A sealing surface is provided,
And the latching convex part which engages with the latching convex part of the said engaging means is provided in the fitting means corresponding | compatible part in the internal peripheral surface of the cylindrical outer wall of the said filling mouth, The seal portion corresponding to the fitting means on the outer peripheral surface of the cylindrical portion is provided with a seal face portion that is in close contact with the seal face portion of the fitting means and prevents the liquid from wrapping around the cylindrical outer wall side. A liquid container characterized by.   The thin-wall portion of the discharge port device is formed by closing an insertion hole opened at a position corresponding to the filling hole in the discharge port device with a sheet including at least a biaxially stretched film. The liquid container according to 1 or 2.   The thin portion of the discharge mouthpiece is formed by compressing and thinning the corresponding position of the filling hole in the discharge mouthpiece after injection molding, and is integrated with the discharge mouthpiece main body. The liquid container as described.

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