JP5625175B2 - Cap for liquid container - Google Patents

Description

  This invention accommodates seasonings such as soy sauce and oil, or sake, fruit drinks, etc., and is a stopper for a liquid container in which a cap is screwed onto a spout protruding from the top of the container. It relates to a cap for a liquid container having a capacity.

  Conventionally, in the container 01 for storing these liquids, considering the ease of use at the time of use, for example, as shown in FIGS. A liquid container 01 is widely used in which a stopper plug 06 made of a screw cap 04 and a spout 05 is projected on an inclined plate 03 at the top of a roof type. The stopper 06 is obtained by screwing a screw cap 04 into a spout tube 07 of a spout 05 protruding from the container 01. As for the opening of the spout 08, a method of pulling out the pull tab 09 and opening it is common.

  By the way, seasonings such as soy sauce and oil, concentrated fruit drinks, soft drinks and the like have a long consumption interval, and are often put in a small amount of containers when commercialized.

  Therefore, in such a small amount of container, for example, about 200 ml, the diameter of the spout is as small as about 10 mm. Therefore, it is very difficult to provide a pull tab by design (in terms of structure). Opening was difficult because the pull tab could not be picked, such as a finger not entering. Therefore, in order to eliminate such inconvenience, as shown in FIGS. 9A and 9B, as shown in FIGS. 9 (A) and 9 (B), a film system cover 001 such as an aluminum seal is pulled with a fingertip when opened to remove it The one in which a margin (a pulling tab in the present invention) 002 is integrally provided is employed. A film-type lid 001 such as an aluminum seal is welded to the spout by heat or the like to ensure the sealing performance of the spout, and after the seal is peeled off, the cap is secured with a cap (for example, Patent Documents 1 to 3). 3).

  However, in the case of the conventional configuration as shown in FIGS. 9A and 9B, the tension allowance 002 needs to be stored in the cap so as not to be wrinkled during distribution. As described above, in particular, a container containing a small amount, for example, a container of about 200 ml, has a shape as shown in FIGS. 9A and 9B because the diameter of the spout is as small as about 10 mm. With a lid typified by another type, the pull margin 002 cannot be made sufficiently large. As a result, it is difficult to shoot the pulling allowance 002, and even if it is picked, the area is small, and the force applied at the time of opening is not sufficiently transmitted. Therefore, it is difficult to peel off, so it is difficult to open the plug. At present, there are many complaints that it is difficult to open. The same applies to the knob portion disclosed in Patent Document 2.

  In addition, as shown in Patent Document 1, in the type in which the lower side of the upper and lower folded seal plate is attached to the spout, while the upper plate portion that exhibits the pull tab function is closed with the cap, It tends to be plastically deformed by pressing force from above. As a result, even when the cap is removed, the upper plate does not lift up because it sticks to the lower seal plate, and it is very difficult to peel it off with a fingertip.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a liquid container plug that can ensure the sealing performance accurately even in the case of a small-sized plug of a container with a small capacity, and can be easily opened. .

  In order to solve the above technical problem, the liquid container cap according to claim 1 of the present invention is configured such that the screw cap is screwed into the spout pipe of the spout protruding from the container. In addition, in a liquid container cap configured to attach a flexible sealing lid to the top surface of the dispensing cylinder to maintain the sealing property of the mouth of the dispensing cylinder, a part of the periphery of the sealing lid A tension tab that is integrally or integrally connected to the seal lid and is folded and polymerized on the seal lid so as to be deployable, and a portion of the tension tab is configured to protrude from the side surface of the dispensing cylinder. The tension tab is lifted upward from the seal lid in accordance with the opening operation of the screw cap.

  As shown in FIGS. 1 and 4, in the mouthpiece for a liquid container having the above-described configuration, a sealing lid is attached to the top surface of the dispensing tube, so that the sealing property of the mouth portion of the dispensing tube is maintained. . A pull tab is folded and polymerized on the upper surface of the seal lid, and is pressed and adhered to the upper surface of the seal by a screw cap. In order to open the mouth portion of the dispensing cylinder of the container from such a sealed state, the screw cap is first rotated to be detached from the dispensing cylinder. By pulling off the screw cap, that is, with the opening operation, the pull tab is lifted upward from the seal lid. As a result, a gap is formed between the upper surface of the seal lid and the pull tab. This gap facilitates insertion of the fingertip between the top surface of the seal lid and the pull tab. As a result, the pull tab can be easily pinched with a fingertip. If the pull tab picked up with the fingertip is pulled up as it is, this pulling force can be used as a force to lift the seal lid upward through the connecting portion, and the seal lid can be easily removed from the mouth of the dispensing cylinder. Can be peeled off successfully.

  According to another aspect of the present invention, as described in claim 2, a spigot is configured by screwing a screw cap onto a spout pipe that protrudes from a container, and the top face of the pour pipe is formed. In a liquid container mouth plug configured to stick a flexible seal lid and maintain the sealing performance of the mouth portion of the dispensing tube, it is integrally or integrally connected to a part of the peripheral edge of the seal lid, In addition, a tension tab is formed on the seal lid so that it can be unfolded, and at least a portion of the tension tab other than the connecting portion with the seal lid is configured to protrude from the side surface of the dispensing cylinder. Along with the opening operation of the screw cap, the protruding portion of the pull tab is hooked on the thread on the inner surface of the screw cap and pulled up, so that the pull tab is moved upward. Tab tension by being raised comes those that are configured to float upward from the sealing lid.

  Further, according to another aspect of the present invention, as described in claim 4, a spigot is formed by screwing a screw cap into a spout pipe of a spout protruding from a container, and the top of the pour pipe is formed. In a liquid container spigot that is constructed so that a flexible sealing lid is attached to the surface to maintain the sealing performance of the mouth of the dispensing tube, it is integrally or integrally connected to a part of the periphery of the sealing lid. And a tension tab that is folded and polymerized on the seal lid so as to be deployable, and a connecting portion of the tension tab with the seal lid is configured to have a length protruding from a side surface of the dispensing cylinder, When the screw cap is closed, the connecting portion is bent downward by at least the thread on the inner surface of the screw cap so that a bending spring effect is applied to the tension tab. Form, in which is configured to float from the sealing lid upward by the pull tab the folds spring effect in association with the unplugging operation of the screw cap.

As shown in FIGS. 1 and 4, in the liquid container spigot having the above-described configuration, a sealing lid is attached to the top surface of the dispensing tube so that the sealing property of the mouth portion of the dispensing tube is maintained. . A pull tab is folded and polymerized on the upper surface of the seal lid. A part of this pulling tab (the free end side in FIG. 1 and the connecting portion side in FIG. 4 together with the seal lid) projects outward from the side surface of the dispensing cylinder. When the screw cap is screwed into the dispensing cylinder from this state, the screw cap is bent downward by the thread on the inner surface of the screw cap.

  Here, in the case of a form in which a part of the pull tab is protruded outward from the side surface of the dispensing cylinder (Claim 2), when the thread passes, the part of the pull tab has its elastic repulsive force. In order to return to the original horizontal posture, the screw is located on the screw valley side beyond the moving path of the top of the screw thread.

  Further, in the case of the form in which the connecting portion is extended outward from the side surface of the dispensing cylinder (Claim 4), when the screw thread passes, the bending end causes the free end side to be lifted upward by the pulling tab. The spring effect that tries to let it work.

  Therefore, when trying to remove the screw cap to open the mouth of the dispensing cylinder, a form in which a part of the pull tab is projected outward from the side surface of the dispensing cylinder by the upward movement of the screw cap. In the case of (Claim 2), a part of the pull tab is hooked on the screw thread, and is pulled upward along with the upward movement of the screw thread, and is lifted upward from the upper surface of the seal lid.

  Further, in the case where the connecting portion is extended outward from the side surface of the dispensing cylinder (Claim 4), the upward force of the screw cap eliminates the pressing force applied to the pulling tab. Floats upward from the upper surface of the seal lid by its bending spring effect.

  Thus, in any case, a gap is formed between the pull tab and the seal lid. Therefore, the fingertip can be easily inserted and a part of the pull tab can be easily picked up. When the picked-up pull tab is pulled up as it is, this pulling force works as a force for pulling up the seal lid through the connecting portion, and works so as to peel off the seal lid well from the mouth portion of the dispensing cylinder.

  Therefore, since the mouthpiece for a liquid container according to the present invention seals the mouth portion of the dispensing cylinder with the seal lid, high sealing performance is maintained. And if you simply remove the screw cap from the dispensing tube, it will be enough to easily lift the pull tab that is as large as or slightly larger than the seal lid and insert your fingertip between the upper surface of the seal lid. An interval is formed. Therefore, unlike the conventional case, there is no need to struggle to get up with the pull tab of the narrow and small pieces stuck to the outer surface of the mouth portion of the dispensing tube, and the pull tab can be easily picked up with a fingertip. Moreover, it can be picked up as it is. In addition, the pull tab is not narrow and small as in the past, but can be as large as or slightly larger than the seal lid, so it has a strong peeling force when peeling the seal lid from the mouth. Can be made to act on the seal lid, and opening is facilitated.

In addition, the liquid container cap according to the present invention has a length from the connecting portion of the pull tab to the sealing lid of the pull tab to the free end facing the connecting portion. It is desirable that the length is longer than the diameter, and the free end is set to a dimension that enters at least the screw cap peripheral wall inner surface side with respect to the moving path of the screw cap top portion of the screw cap.
When opening with the screw cap, this protruding part is located on the peripheral wall side of the screw cap beyond the moving path of the screw thread, so it can be lifted firmly by the screw thread and lifted upwards accurately It is.

Further, in the liquid container plug according to the present invention, at least the tension tab is either a multilayer film provided with an aluminum seal or an aluminum foil, or a film made of a synthetic resin. desirable.
Regardless of whether it is firm or not, it is lifted by the thread of the screw cap or the spring force due to the bending of the connecting part, the action acts exactly on the pull tab, and the desired desired lifting posture It is because it is realizable.

Moreover, as for the stopper for liquid containers which concerns on this invention, as described in Claim 7, it is desirable that a container is a 50 square paper container.
This is because application to a paper container of this rank with a small diameter having a small-diameter opening can ideally exhibit the effects brought about by the present invention.

FIG. 3 is an explanatory side view showing a state in which the sealing cap is attached to the mouth portion, showing an embodiment of the liquid container mouth plug according to the present invention. The structure of a seal lid and a pull tab is shown, (A) is a plan view in which the seal cover and the pull tab are developed, and (B) is a cross-sectional view taken along line AA in (A). It is explanatory drawing of an effect | action, (A) is a partially notched explanatory side view after screw cap closure, (B) is an explanatory side view when a screw cap is removed. FIG. 10 is a side view illustrating another embodiment and showing a state where a seal lid is attached to the mouth. The structure of the seal lid and tension tab of another embodiment is shown, (A) is an overall plan view, and (B) is a cross-sectional view along AA in (A). It is explanatory drawing of an effect | action of another Example, (A) is a partially notched explanatory side view after screw cap closure, (B) An explanatory side view when a screw cap is removed. It is an external view of the 50 square paper container employ | adopted for this invention. A prior art example is shown, (A) is a paper container and the whole external view, (B) is a partially cutaway sectional view of the main part. Furthermore, another example is shown, (A) is a whole top view of a seal lid, (B) is an external view of the principal part in the state affixed on the opening | mouth part.

  Hereinafter, an embodiment in which the mouthpiece for a liquid container according to the present invention is applied to a soy sauce paper container containing 50 ml and 200 ml will be described based on the description of FIGS.

  As shown in FIG. 7, the 50-square soy sauce paper container 1 employed in the present invention has a trunk portion 2 in the shape of a prism and a gable roof-type top inclined plate in consideration of ease of use at the time of use. 3 is a liquid paper container in which a cap 6 composed of a screw cap 4 and a spout 5 is projected. As shown in FIG. 1, the spigot 6 is composed of a screw cap 4 that is screwed into an extraction tube 7 of a spout 5 protruding from the container 1. In FIG. 1, SA is a sealing material accommodated inside the screw cap 4.

  The paper container 1 is manufactured by processing a laminated sheet made of a thermoplastic synthetic resin, whose inner layer and outer layer are heat-sealable, using paperboard as a base material, and then box-producing it. The material of the laminated sheet may be any material as long as it contains soy sauce and can withstand long-term storage. Specifically, for example, [container outside] polyethylene / paperboard / polyethylene / aluminum foil / polyethylene terephthalate film / polyethylene [container inside A known material structure such as] can be preferably used. In addition, as the paperboard used for the paper container 1, a coat ball, a coat manila, etc. can be used, and what can print a character, a picture, etc. on the surface as needed is desirable.

  In such a small amount accommodation type paper container, the diameter of the mouth portion 8 of the dispensing cylinder 7 is about 10 mm, which is very small.

  In addition, a female screw of a screw cap 4 is screwed onto the outer surface of the pouring cylinder 7, and the screw cap 4 is screwed onto the pouring cylinder 7 so as to be detachable.

  In order to seal the entire area of the top surface of the mouth portion 8, the lower surface of the peripheral edge of the circular seal lid 9 is attached by a heat stamp welding method, a high frequency welding method, or an appropriate adhesive means using an adhesive. Is done.

  As shown in FIGS. 2 (A) and 2 (B), the seal lid 9 is integrally provided with a strip-like pull tab 10 extending radially from a part of the periphery thereof. The pull tab 10 is formed by folding up and down twice so that a line segment that linearly connects the connecting portion 11 with the seal lid 9 can be expanded as a fold line 12.

  A length D (diameter) of the seal lid 9 to the fold line 12 and the peripheral edge 9A facing the fold line 12 is set to be equal to or slightly longer than the outer dimension of the mouth portion 8 of the dispensing tube 7. Necessary for sealing the mouth 8.

  As the seal lid 9 and the pull tab 10, a multilayer film in which an aluminum film, a polyester film or the like is laminated is adopted. If necessary, a relatively strong type of thermoplastic synthetic resin is also used.

  In connecting the pull tab 10 to the seal lid 9, as shown in FIGS. 2A and 2B, and further shown in FIGS. The one of the form is adopted. Although not shown, the sealing lid 9 and the pulling tab 10 are formed separately, and the base end 10A of the pulling tab 10 is attached to a part of the peripheral edge of the sealing lid 9 by the appropriate bonding means described above. It may be.

  Next, how to attach the seal lid 9 and the pull tab 10 to the mouth portion 8 for facilitating the opening of the seal lid 9 will be described in detail. Basically, there are two forms, both of which lift the pull tab 10 upward so as to obtain a gap S between the seal lid 9 and the pull tab 10 so that it can be easily picked.

  First, as shown in FIG. 3, the pull tab 10 is pulled upward by the thread of the screw cap 4 to obtain a gap S with the seal lid 9. The second is a form in which a gap S is obtained between the sealing lid 9 and the sealing lid 9 by a bending spring effect obtained by folding the sealing lid 9 and the pull tab 10 as shown in FIG.

A specific configuration of the first embodiment will be described.
As shown in FIGS. 1 and 2A and 2B, the length d of the pull tab 10 to the free end 10B facing the connecting portion 11 with the seal lid 9 is larger than the diameter D of the seal lid 9. As shown in FIG. 1, the length of the free end 10 </ b> B exceeds the moving path L of the top 14 of the screw thread 13 of the screw cap 4 and enters the inner surface 4 </ b> B side of the peripheral wall 4 </ b> A of the screw cap 4. Is set. That is, when the screw cap 4 is screwed into the dispensing cylinder 7, the free end 10 </ b> B of the pull tab 10 is set to a dimension that enters the screw valley 15.

With such a configuration, as shown in FIG. 1, the sealing performance of the mouth portion 8 is maintained by sticking the seal lid 9 to the mouth portion 8 of the dispensing tube 7. Further, the pull tab 10 is folded on the upper surface of the seal lid 9. In this state, the free end 10 </ b> B side of the pull tab 10 projects outward from the side surface of the extraction tube 7. Next, when the screw cap 4 is screwed into the dispensing cylinder 7, the free end 10 </ b> B of the pull tab 10 is bent downward by the passage of the screw thread 13 on the inner surface of the screw cap 4. When the screw thread 13 passes, as shown in FIG. 3A, the free end 10B of the pull tab 10 tries to return to the original horizontal posture by its elastic repulsive force, and the moving path of the top part 14 of the screw thread 13 It will be located on the screw valley 15 side beyond L. When screwing of the screw cap 4 is completed, the screw cap 4 is pressed and adhered to the upper surface of the seal lid 9 in a state where the pull tab 10 is folded and polymerized on the upper surface of the seal lid 9.

  In order to open the mouth part 8 of the dispensing cylinder 7 of the container from such a sealed state, the screw cap 4 is first rotated and detached from the dispensing cylinder 7. At this time, since the free end 10B of the pull tab 10 is located on the screw valley 15 side of the screw cap 4, the free end 10B of the pull tab 10 is hooked on the screw thread 13 by the upward movement of the screw cap 4. And pulled up. As a result, as shown in FIG. 3B, the free end 10 </ b> B side floats upward from the upper surface of the seal lid 9, and a gap S is formed between the seal lid 9 and the pull tab 10.

Next, a specific configuration of the second embodiment will be described.
As shown in FIGS. 4, 5 </ b> A, and 5 </ b> B, the connecting portion 11 side of the seal lid 9 and the pulling tab 10 is moved further than the outer peripheral surface of the dispensing cylinder 7. The dimension is set so as to enter the inner surface 4B side of the peripheral wall 4A of the screw cap 4 beyond the locus L. That is, when the screw cap 4 is screwed into the dispensing cylinder 7, the dimension is set such that at least the left and right end edge portions 11 </ b> A of the connecting portion 11 enter the screw valley 15.

    With such a configuration, as shown in FIG. 4, the sealing performance of the mouth portion 8 is maintained by sticking the seal lid 9 to the mouth portion 8 of the dispensing tube 7. Further, the pull tab 10 is folded on the upper surface of the seal lid 9. In this state, at least the left and right end edge portions 11 </ b> A side of the connecting portion 11 of the seal lid 9 and the pull tab 10 protrude outward from the side surface of the extraction tube 7. Next, when the screw cap 4 is screwed into the dispensing cylinder 7, as shown in FIG. 6 (A), the thread cap 13 on the inner surface of the screw cap 4 passes through the outside of the dispensing cylinder 7 from the side. At least the left and right end edge portions 11A of the connecting portion 11 protruding to the bottom are bent downward. As a result of this bending, the pulling tab 10 accumulates a spring force that tends to lift the free end 10B side upward. As a result, the pulling tab 10 is given a spring effect that always tries to lift the free end 10B side upward. In particular, since the connecting portion 11 is bent in a state where the seal lid 9 and the pull tab 10 are overlapped, the spring effect to lift the free end 10B of the pull tab 10 upward is far more than a single one. Become stronger. When screwing of the screw cap 4 is completed, the screw cap 4 is pressed and adhered to the upper surface of the seal lid 9 in a state where the pull tab 10 is folded on the upper surface of the seal lid 9.

  In order to open the mouth portion 8 of the container extraction tube 7 from such a sealed state, the screw cap 4 is first rotated and detached from the extraction tube 7. At this time, since the seal lid 9 and the connecting portion 11 of the pull tab 10 are in close contact with each other in double overlap, the rigidity is higher than the flexibility, and the bent position is maintained after being bent once. Accordingly, the connecting portion 11 maintains its bent posture even when the screw cap 4 is moved upward. Further, as the screw cap 4 is further rotated and the pressing force by the inner surface of the top plate 4C is released, as shown in FIG. 6B, the free end 10B side of the pull tab 10 has its bending spring effect. As a result, it floats upward from the upper surface of the seal lid 9 by itself. Finally, a gap S is formed between the sealing lid 9 and the seal lid 9.

  In this way, a gap S is formed between the seal lid 9 and the pull tab 10 in any of the cases shown in FIGS. 1 to 3 and FIGS. Therefore, the fingertip can be easily inserted, and the free end 10B of the pull tab 10 can be easily picked up. When the picked-up pull tab 10 is pulled up as it is, this pulling force acts as a force for pulling up the seal lid 10 via the connecting portion 11, and the seal lid 10 is successfully peeled off from the mouth portion 8 of the dispensing cylinder 7. To work.

  In the embodiment shown in FIGS. 4 to 6, the dimension d of the pull tab 10 does not need to be long as in the embodiment shown in FIGS. The free end 10B may be at a position equivalent to the peripheral edge 9A of the seal lid 9, and may be slightly shorter as necessary. Although it depends on the size of the gap S, it is desirable that the free end 10B is located within the range from the peripheral edge 9A to the center of the seal lid 9.

  The opening 8 of the dispensing tube 7 is sealed by screwing the screw cap 4 thereon.

  Next, from the multilayer film of aluminum film and polyester film, an integrated seal lid and a strip-like tensile pull tab of the form shown in FIG. 2 are obtained, and the projecting dimension of the strip-like tensile pull tab from the free end of the seal lid is 0. Make 100 pieces each of 0mm, 0.3mm, 0.5mm, 0.8mm, stick the obtained seal lid to the mouth of the extraction tube, open the screw cap, and in each case Then, the floating state of the free end of the strip-shaped pulling tab was confirmed.

  The result was clear, and when the projecting dimension was 0.0 mm, there was no number of lifts, and all the pieces remained in close contact with the seal lid. In addition, 35 pieces did not rise at 0.3 mm. In the case of 0.5 mm and 0.8 mm, all of them floated up and could be picked and opened as they were.

  From the above results, it has been found that when the overhang dimension is from 0.3 to 0.8 mm, the pulling force of the screw cap of the screw cap works accurately, and a desirable gap is obtained.

  Also, from the multilayer film of the aluminum film and the polyester film, two types of the sealing lid of the form shown in FIG. 5 and the adhesive type not shown in the figure and the belt-like tension pull tab are obtained, and the connecting part is the mouth part of the dispensing cylinder Protrusions from the outer edge of 0.0mm, 0.3mm, 0.5mm, and 0.8mm are manufactured in 100 pieces, and the obtained seal lid is attached to the mouth of the dispensing tube, and the screw cap is closed. After that, the plug was opened, and in each case, the floating state of the free end of the belt-like pull tab was confirmed.

  According to the obtained result, when the protruding dimension was 0.0 mm, 36 pieces did not float and remained in close contact with the seal lid. In addition, 8 pieces did not rise at 0.3 mm. In the case of 0.5 mm and 0.8 mm, all of them floated up and could be picked and opened as they were.

  From the above results, it was found that a desired gap was obtained when the overhang dimension was 0.3 to 0.8 mm.

  The above-described stopper for a liquid container according to the present invention is not limited to a soy sauce container, but is applied to a container for storing other liquid seasonings, oils, sake, fruit drinks, and the like. In addition, the configuration of the container is not limited to the gable roof type, and can be applied to, for example, a synthetic resin tube container, an empty pouch, etc., as long as it has a pouring tube and a screw cap. Needless to say.

DESCRIPTION OF SYMBOLS 1 ... Paper container 2 ... Body part 3 ... Inclined plate 4 ... Screw cap 7 ... Dispensing pipe | tube 8 ... Mouth part 9 ... Seal lid 9A ... Periphery 10 ... Pulling tab 10B ... Free end 11 ... Connection part 13 ... Screw thread 14 ... Top 15 ... Screw trough D ... Diameter of seal lid d ... Length of pull tab L ... Trajectory of screw crest S ... Gap

Japanese Utility Model Publication No. 58-103751 JP-A-10-59406 Japanese Utility Model Publication No. 56-91267

Claims (7)

  A spigot is formed by screwing a screw cap into a spout pipe that protrudes from the container, and a flexible synthetic resin seal lid is attached to the top surface of the pipe. In a liquid container stopper configured to maintain the sealing performance of the mouth, it is integrally or integrally connected to a part of the periphery of the seal lid, and is folded and polymerized on the seal lid so as to be deployable. A pull tab is provided, and a part of the pull tab is configured to protrude from the side surface of the dispensing tube, and the pull tab is lifted upward from the seal lid when the screw cap is opened. A mouthpiece for a liquid container, characterized in that it is configured.   A spigot is formed by screwing a screw cap into a spout pipe that protrudes from the container, and a flexible synthetic resin seal lid is attached to the top surface of the pipe. In a liquid container stopper configured to maintain the sealing performance of the mouth, it is integrally or integrally connected to a part of the periphery of the seal lid, and is folded and polymerized on the seal lid so as to be deployable. A pull tab, and at least a portion of the pull tab other than the connecting portion with the seal lid is configured to protrude from a side surface of the dispensing tube, and the pull tab is opened when the screw cap is opened. The protruding portion of the screw cap is hooked on the thread on the inner surface of the screw cap and pulled up, so that the pulling tab is pulled up to lift the pulling tab. Liquid container spout, characterized in that is configured to float from Lumpur lid upward.   The length from the connecting portion of the pull tab to the seal lid to the free end facing this connecting portion is longer than the diameter of the extraction tube, and the free end is at least a screw than the moving path of the screw cap of the screw cap. The cap for a liquid container according to any one of claims 1 to 2, wherein the cap is set to a size that penetrates into the inner surface side of the cap peripheral wall.   A spigot is formed by screwing a screw cap into a spout pipe that protrudes from the container, and a flexible synthetic resin seal lid is attached to the top surface of the pipe. In a liquid container stopper configured to maintain the sealing performance of the mouth, it is integrally or integrally connected to a part of the periphery of the seal lid, and is folded and polymerized on the seal lid so as to be deployable. A pull tab is provided, and a connecting portion of the pull tab with the seal lid is configured to protrude from a side surface of the dispensing tube, and the connecting portion is at least screwed on the inner surface of the screw cap when the screw cap is closed. Is configured to be bent downward to provide a bending spring effect to the pull tab. Liquid container spout, characterized in that is configured to float from the sealing lid upward by tension tab the folds spring effect Tsu.   4. The liquid container plug according to claim 1, wherein the pull tab is integrally connected to a part of the peripheral edge of the seal lid or integrally connected by an adhesive means.   The plug for a liquid container according to any one of claims 1 to 4, wherein the pull tab and the seal lid are either an aluminum seal, a multilayer film provided with an aluminum foil, or a film made of a synthetic resin.   A container for a liquid container according to any one of claims 1 to 5, wherein the container is a 50-square paper container.

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