JP5955585B2 - Pouring cap - Google Patents

Description

  The present invention relates to a pouring cap, and more particularly, to a pouring cap that is attached to a mouth neck portion of a container body and dispenses a liquid content contained in the container body from a pouring cylinder.

  In recent years, with regard to synthetic resin containers that contain various liquids and other contents, it has become possible to reduce the environmental burden, and various thin-walled containers have been developed that reduce the amount of resin used. Yes. In addition, refill containers such as pouches are often used as containers for storing various detergents and foods. A refill container refills or replenishes the contents contained in, for example, a refill container equipped with a pour-out cap equipped with a pour-out nozzle by a pour-out cylinder, so that an expensive refill container or The dispensing cap should be used for a long time without being discarded each time.

  On the other hand, a pouch, which is a bag-like container that is frequently used as a refill container, uses a film made of soft packaging material that is rich in flexibility and flexibility, and, for example, seals and joins the peripheral portions of a plurality of films. The container is easily deformed during the refilling operation, and is extremely unstable. For this reason, for example, there are various techniques for making it possible to easily refill the contents in a stable state from a refilling pouch by adding an improvement to a pouring cap having a pouring nozzle with a pouring cylinder. It has been developed (see, for example, Patent Document 1 and Patent Document 2).

JP 2002-1981 A JP 2006-182359 A

  In the liquid agent dispensing container of Patent Document 1, the width of the slit, which is an open portion formed on the side surface of the dispensing cylinder of the dispensing cap, is formed stepwise so that the upper side is wider than the lower side. The mouth portion of the refilling pouch can be easily inserted into the inside of the dispensing nozzle. On the other hand, the refill outflow opening formed in the inserted mouth portion is likely to be blocked by the narrow slit, and particularly when the mouth portion is inserted to the back of the dispensing cylinder at the final stage of refilling. Since the content liquid that has decreased becomes difficult to flow through the refill outflow opening, it becomes easy to feel bothered by refilling the entire content liquid.

  In the pouring container of Patent Document 2, the tip of the pouring cylinder of the pouring cap is pointed, and at the time of refilling, the tip of the pouring pipe is refilled formed at the mouth portion of the refilling pouch. By inserting into the outflow opening, the mouth portion can be stabilized and the refill outflow opening can be easily held open. On the other hand, the refill outflow opening is arranged so as to cover the outer peripheral surface of the dispensing cylinder and surround the outside thereof, so that a gap formed between the outer peripheral surface of the dispensing cylinder and the refill outflow opening. The content liquid easily flows out of the liquid, and the content liquid wraps around the outside of the dispensing tube, so that the content liquid is easily spilled during refilling.

  The present invention can refill the content liquid from the refilling pouch at the time of refilling into the refilling container equipped with the pouring cap in a stable state via the pouring cylinder, and the refilling outflow opening. An object of the present invention is to provide a pouring cap that can easily hold an open state and can be smoothly refilled into a refilling container without spilling.

  The present invention is a dispensing cap that is provided with a dispensing cylinder having an open portion formed on a side surface, and that is attached to the neck of the container body to dispense the content liquid from the dispensing cylinder. The inner cylinder wall is disposed along the inner peripheral surface of the mouth portion of the neck portion, and the bottom wall wall is provided continuously to the lower end portion of the inner cylinder wall. The dispensing cylinder is separated from the inner cylinder wall. In addition, an outlet is formed in the inner region of the base end portion of the extraction cylinder connected to the bottom wall, and is provided in the middle in the vertical direction of the extraction cylinder. The portion is provided with a mouth opening insertion protrusion that is supported from the inner side surface of the dispensing cylinder and is disposed in the middle portion in the width direction of the opening and extends in the longitudinal direction of the dispensing cylinder. When refilling the content liquid from the refilling pouch into the container body, the shape is formed at the mouth of the refilling pouch. By providing the spout cap in which the mouth opening insertion protrusion is inserted into the refill outflow opening thus formed so that the refill outflow opening is kept open and the mouth portion is positioned. Achieved.

  According to the dispensing cap of the present invention, the content liquid from the refilling pouch can be refilled in a stable state via the dispensing cylinder to the refilling container equipped with the dispensing cap at the time of refilling. At the same time, it is possible to easily hold the refill outflow opening and refill the refill container smoothly without spilling.

It is a schematic perspective view of the extraction container with which the extraction cap which concerns on preferable 1st Embodiment of this invention was mounted | worn with the mouth part of the container main body. It is a perspective view of the extraction | pouring cap which concerns on preferable 1st Embodiment of this invention. It is a perspective view which shows the extraction cap which concerns on preferable 1st Embodiment of this invention in the state notched along AA of FIG. (A)-(c) is a schematic side view explaining the condition of refilling the content liquid from the refilling pouch to the refilling container via the dispensing cap according to the preferred first embodiment of the present invention. . It is a top view of the extraction cap which concerns on preferable 2nd Embodiment of this invention.

  As shown in FIG. 1, the dispensing cap 10 according to the preferred first embodiment of the present invention is a mouthpiece portion of a container main body 21 that constitutes a refill container 20, for example, a bottle container containing a liquid detergent as a content liquid. It is used by being attached to 21a. As shown in FIG. 2, the pouring cap 10 of the first embodiment includes a pouring tube 11 having an opening portion 11 a formed on the side surface as a pouring nozzle, and the tip portion of the pouring tube 11. Thus, the content liquid stored in the refill container 20 can be poured out. Further, the dispensing cap 10 can be opened without removing the dispensing cap 10 from the mouth portion 21a of the container body 21 when the content liquid stored in the refill container 20 is low or empty. While equipped with the neck part 21a, it has a function of allowing the content liquid to be refilled from the refilling pouch 30 into the refillable container 20 through the dispensing cylinder 11 (FIG. 4 (a) to 4a). (See (c)), without spilling the content liquid, it has a function that allows the refill pouch 30 to be smoothly refilled into the refill container 20 from the refill pouch 30 to the end.

  And as shown in FIGS. 1-3, the extraction cap 10 of this 1st Embodiment is the extraction pipe | tube 11 by which the opening part 11a was formed in the side surface along the longitudinal direction of the container main body 21, ie, the vertical direction. And is a cap that is attached to the mouth part 21a of the container body 21 and allows the content liquid to be poured out from the dispensing tube 11, and is disposed along the inner peripheral surface of the mouth part 21a of the container body 21. In addition to having a cylindrical wall 12, a bottom wall 13 is provided continuously to the lower end portion of the inner cylindrical wall 12, and the extraction cylinder 11 is provided so as to stand up from the bottom wall 13 while being separated from the inner cylindrical wall 12. At the same time, an outlet 14 is formed in the inner region of the base end portion of the extraction tube 11 connected to the bottom wall 13. An intermediate portion in the vertical direction of the extraction tube 11 is supported from the inner surface of the extraction tube 11 and is an intermediate portion in the width direction of the opening portion 11a (the intermediate portion in the width direction when viewed from the direction X facing the opening portion 11a). ) And a mouth opening insertion projection 15 extending in the longitudinal direction of the dispensing cylinder 11 is provided. When the content liquid is refilled from the refill pouch 30 to the container main body 21, the mouth opening insertion protrusion 15 is formed in the refill outflow opening 30b (see FIG. 4A) formed in the mouth portion 30a of the refill pouch 30. When inserted, the refill outflow opening 30b is kept open, and the mouth portion 30a of the refill pouch 30 is positioned.

  Further, in the first embodiment, the mouth opening insertion protrusion 15 is stretched over the inner wall surfaces on both sides of the opening portion 11a of the dispensing tube 11 and viewed from the direction X facing the opening portion 11a. It is supported by a support beam portion 16 provided across the open portion 11 a and is provided so as to extend in the longitudinal direction of the extraction tube 11.

  In the first embodiment, the pouring cap 10 is a molded product made of a synthetic resin made of, for example, polypropylene, polyethylene, polyethylene terephthalate, and the like, and as shown in FIGS. 2 and 3, the mouth portion 21 a of the container body 21. An inner cylindrical wall 12 disposed along the inner peripheral surface of the inner cylindrical wall 12, a bottom wall 13 connected to the lower end portion of the inner cylindrical wall 12, and a vertical wall spaced apart from the inner cylindrical wall 12. And a dispensing cylinder 11.

  The inner cylinder wall 12 is formed in a substantially cylindrical shape having a portion having an outer diameter substantially the same as the inner diameter of the mouth portion 21 a of the container body 21. An upper end surface of the inner cylindrical wall 12 is an opening surface, and an annular flange portion 12a is integrally provided so as to protrude outward from an opening edge portion of the upper end opening surface. The outer cap surface of the inner cylindrical wall 12 is brought into close contact with the inner peripheral surface of the mouth portion 21a of the container main body 21 until the annular flange portion 12a contacts the upper end surface of the mouth portion 21a. By fitting the inside of the mouth part 21a of the main body 21, the pouring cap 10 is attached and fixed to the mouth part 21a of the container body 21 (see FIG. 1). The lower end portion of the inner cylindrical wall 12 is a tapered reduced diameter portion 12b in which the outer diameter is gradually reduced. The taper reduced diameter portion 12b is disposed so as to be cut out obliquely, and a bottom wall 13 is provided.

  The bottom wall 13 is an annular frame plate-like portion that protrudes inward from the lower end portion of the inner cylindrical wall 12 and extends continuously inward. The bottom wall 13 is provided so as to be inclined downward so that the open portion 11a side of the extraction cylinder 11 standing from the bottom wall 13 is lowered. The dispensing cylinder 11 is provided upright from the inner edge of the bottom wall 13 which is an annular frame plate-like portion, and is provided integrally with the bottom wall 13. As a result, the extraction tube 11 is provided away from the inner surface of the inner tube wall 12, and the outlet 14 is provided in the inner region of the base end portion of the extraction tube 11 connected to the inner edge of the bottom wall 13. Will be formed.

  The dispensing cylinder 11 is a portion called a so-called dispensing spout having a substantially U-shaped cross-sectional shape in which an open portion 11a is formed on a side surface along the longitudinal direction. In the first embodiment, the dispensing cylinder 11 has a substantially U-shaped cross-sectional shape in which the width of the open portion 11a is narrowed by the protruding guide wall portions 11b on both sides. The dispensing cylinder 11 is erected with a height protruding from the bottom wall 13 to above the upper end opening surface of the inner cylinder wall 12, and a portion protruding upward from the upper end opening surface of the inner cylinder wall 12 is It is formed so as to have a substantially four semicircular shape when viewed from the side (see FIGS. 4A to 4C).

  And in this 1st Embodiment, as shown in FIG.2 and FIG.3, it is supported via the support beam part 16 from the inner surface of the extraction pipe | tube 11, and the opening opening projection 15 of mouth opening of the extraction cylinder 11 is carried out. It is arranged and provided in the middle part in the up-and-down direction. In the first embodiment, the support beam portion 16 is formed on the inner wall surface of the portion of the extraction cylinder 11 adjacent to the inside of the extension base end portion of the pair of extension guide wall portions 11b in the inner region of the extraction cylinder 11. By joining both end portions as a single body, the two end portions are spanned between the inner wall surfaces on both sides with the pair of overhanging guide wall portions 11b and the opening portion 11a interposed therebetween. Accordingly, the support beam portion 16 is provided at a height position lower than the upper end opening surface of the inner cylindrical wall 12 across the open portion 11a when viewed from the direction facing the open portion 11a. Further, in the first embodiment, the mouth opening insertion protrusion 15 is integrally joined to the central portion of the support beam portion 16 and is erected upward, so that the dispensing cap 10 at the time of use of the content liquid is provided. When viewed from the direction X facing the opening 11a, which is also the tilting direction of the mounted container main body 21, the container body 21 is disposed and provided in the intermediate portion in the width direction of the opening 11a.

  In the first embodiment, the mouth opening insertion protrusion 15 is a vertically long spatula-like protrusion, preferably having a protrusion width of about 3 to 10 mm, and the opening as viewed from the direction X facing the opening portion 11a. The front shape facing the portion 11a is a shape in which the protrusion width gradually narrows toward the tip side. The mouth opening insertion protrusion 15 extends upward from the support beam portion 16 preferably at a height of about 8 to 30 mm, and at least its upper end portion protrudes above the upper end opening surface of the inner cylindrical wall 12. It is provided as follows. The mouth opening insertion protrusion 15 is preferably formed in the inner region of the dispensing cylinder 11 so that there is no portion projecting outward from the upper surface opening 11c at the upper end of the dispensing cylinder 11 or the opening 11a on the side surface. Arranged so as to fit.

  Further, in the first embodiment, the mouth opening insertion protrusion 15 has a V-shaped or arc-shaped traverse (in the first embodiment, a flat V-shape) whose inner side surface is recessed concavely toward the outside. It has a surface shape. Further, the mouth opening insertion protrusion 15 has a flat V-shaped cross-sectional shape in which an outer surface of the mouth opening insertion protrusion 15 is formed with an edge-shaped ridge line portion 15a extending in the vertical direction at the center portion in the width direction.

  Since the projection width of the mouth opening insertion projection 15 is gradually narrowed toward the tip side, when the content liquid is refilled from the refilling pouch 30 to the container main body 21, the mouth portion 30a of the refilling pouch 30 is not filled. It becomes easy to insert the mouth opening insertion protrusion 15 into the formed refill outflow opening 30b. By disposing the entire mouth opening insertion protrusion 15 so as to be within the inner region of the dispensing tube 11, it is possible to effectively avoid touching the mouth opening insertion protrusion 15 with a hand or a finger. .

  Since the inner side surface of the mouth opening insertion protrusion 15 has a V-shaped or arc-shaped cross-sectional shape that is recessed concavely toward the outside, a space of a considerable size is provided inside the mouth opening insertion protrusion 15. , And the content liquid smoothly flows downward when refilling, so that the flow rate of the content liquid passing through the dispensing tube 11 can be prevented from being lowered by the mouth opening insertion projection 15. Further, since it becomes difficult for the content liquid to flow outside the mouth opening insertion projection 15, it is easy to replace the air inside the container body 21 through the outlet 14, and the content liquid overflows from the dispensing cap 10 when refilling. It is possible to effectively avoid exiting.

  The outer surface of the mouth opening insertion projection 15 has a V-shaped cross-sectional shape in which an edge-shaped ridge line portion 15a is formed at the center in the width direction, so that the contents from the refilling pouch 30 to the container body 21 When the liquid is refilled, the mouth opening insertion protrusion 15 is easily inserted into the refill outflow opening 30b formed in the mouth portion 30a of the refilling pouch 30.

  Moreover, in this 1st Embodiment, as mentioned above, the extraction | pouring cylinder 11 is provided with the substantially U-shaped cross-sectional shape by which the width | variety of the open part 11a was narrowed by the overhang | projection guide wall part 11b on both sides. As a result, the overhang guide wall portion 11 b serves as a guide, and the refill outflow opening 30 b of the mouth portion 30 a of the refill pouch 30 can be smoothly guided to the mouth opening insertion protrusion 15. In order to enhance the function as a guide, the overhanging guide wall portion 11b is preferably connected to the opening peripheral edge portion of the upper surface opening portion 11c of the pouring tube 11 by widening the opening width toward the upper end portion. ing.

  In the first embodiment, the support beam portion 16 that supports the mouth opening insertion protrusion 15 is a portion of the pour tube that is adjacent to the pair of overhanging guide wall portions 11b in the inner region of the pour tube 11 as described above. By joining both end portions of the inner wall surface to the inner wall surface 11 as a unit, the inner wall surface is spanned between the inner wall surfaces on both sides of the pair of overhanging guide wall portions 11b and the opening portion 11a. Accordingly, as described above, the support beam portion 16 is provided at a height position lower than the upper end opening surface of the inner cylindrical wall 12 across the open portion 11a when viewed from the direction facing the open portion 11a. It is done. A mouth opening insertion protrusion 15 is erected and arranged at the central portion of the support beam 16 so as to be integrally joined to the support beam 16. As a result, the mouth opening insertion protrusion 15 is disposed at the intermediate portion in the width direction of the opening portion 11a.

  In addition, the support beam portion 16 extends upward along the inner wall surface of the extraction tube 11 from both end portions thereof, and a pair of auxiliary guide wall portions 16a are provided with the mouth opening insertion protrusions 15 therebetween. Arranged so as to be sandwiched. The auxiliary guide wall 16a extends upward from both end portions of the support beam 16 so as to have the same cross-sectional shape. As a result, the mouth opening insertion projection 15 is inserted between the side end surface of the auxiliary guide wall 16a on both sides on the mouth opening insertion projection 15 side and the mouth opening insertion projection 15 whose projection width gradually decreases toward the tip. On both sides of the projection 15, mounting slits 17 having a width that narrows downward are formed. When inserting the mouth opening insertion projection 15 into the refilling outflow opening 30b of the mouth portion 30a of the refilling pouch 30, the films on both sides of the opening edge of the refilling outflow opening 30b are inserted into these mounting slits 17. In this way, the state where the refill outflow opening 30b is opened can be held in a more stable state, and the mouth portion 30a can be positioned in a more stable state. .

  Furthermore, in this embodiment, the lower end of the support beam 16 and the inner wall surface of the extraction cylinder 11 are gently connected, so that the content liquid flows so as to cover the inner wall surface of the extraction cylinder 11 when refilling. As a result, it is possible to prevent the liquid from dropping, to prevent bubbles from being generated inside, and to effectively prevent liquid leakage accompanying the generation of bubbles.

  Furthermore, in the present embodiment, since the support beam portion 16 is connected so as to partition the inside of the open portion 11a closer to the open side, the content is the same as that of a conventional dispensing tube during normal use. When pouring the liquid, the content liquid can be smoothly poured out without hindering the flow of the content liquid.

  According to the pouring cap 10 of the first embodiment having the above-described configuration, it is used by being attached to the mouth portion 21a of the container body 21 of the refill container 20, and when using the content liquid, As the refill container 20 is tilted, the content liquid stored in the container main body 21 can be poured out from the tip of the dispensing cylinder 11. In addition, when the content liquid stored in the refill container 20 is reduced or emptied, the dispensing cap 10 remains attached to the mouth part 21a without being removed from the mouth part 21a of the container body 21. In this state, the content liquid can be refilled from the refilling pouch 30 to the refillable container 20 through the dispensing cylinder 11 to the end in a stable state.

  That is, as shown in FIGS. 4A to 4C, in order to refill the content liquid from the refill pouch 30 to the refill container 20, for example, the mouth portion 30a of the refill pouch 30 is cut. After opening the refilling pouch 30 to form the refilling outlet 30b, the mouth portion 30a where the refilling outlet 30b is formed is placed on the inner side of the dispensing cylinder 11 of the dispensing cap 10 with an overhang guide. While being guided by the wall portion 11b, it is inserted from the open portion 11a on the side surface of the dispensing tube 11. Further, the refilling pouch 30 is gradually tilted while rotating upward about the inserted mouth portion 30a (see FIG. 4A). Along with this, while opening the film on both sides of the opening edge portion of the refilling outflow opening 30b into the mounting slit 17 between the auxiliary guide wall portion 16a, preferably inside the pouring cylinder 11, the mouth opening The insertion protrusion 15 is inserted inside the refill outflow opening 30b.

  Thereafter, if the refilling pouch 30 is further tilted while rotating, the mouth opening insertion protrusion 15 is inserted deeper into the refilling outflow opening 30b, thereby opening the refilling outflow opening 30b to a large extent. At the same time, the mouth portion 30a of the refilling pouch 30 is positioned inside the dispensing cylinder 11 in a more stable state (see FIG. 4B).

  Accordingly, the refilling pouch 30 can be rotated around the supported mouth portion 30a while the mouth portion 30a is supported by the mouth opening insertion protrusion 15 inserted into the refilling outflow opening 30b. become. In addition, by this, while the refill outflow opening 30b is largely opened by the mouth opening insertion protrusion 1, the liquid contained in the refill pouch 30 is tilted in a stable state until it is vertically raised and substantially inverted. Then, it is possible to smoothly flow into the inside of the container body 21 of the refill container 20 via the outlet cylinder 11 and the outlet 14 inside the base end of the outlet cylinder 11 (FIG. 4 ( c)).

  In addition, in order for the user to pour out the content liquid from the refilling pouch 30 to the end, for example, the refilling pouch 30 is crushed in a state where the refilling pouch 30 is lifted vertically and substantially inverted. Even when the content liquid is squeezed out while being folded, the mouth opening insertion protrusion 15 is inserted inside the refill outflow opening 30b, so that the mouth portion 30a is prevented from being displaced and wobbled, and the refill outflow opening 30b. It is possible to perform a squeezing operation in a stable state while opening a large opening.

  Therefore, according to the pouring cap 10 of the first embodiment, the content liquid is refilled from the refilling pouch 30 at the time of refilling into the refilling container 20 to which the pouring cap 10 is attached via the pouring cylinder 11. It is possible to refill in a stable and stable state, and easily hold the refill outflow opening 30b and allow the refill container 20 to be refilled smoothly to the end without spilling. .

  FIG. 5 shows a dispensing cap 40 according to a second preferred embodiment of the present invention. While the pouring cap 40 of the second embodiment shown in FIG. 5 has substantially the same configuration as the pouring cap 10 of the first embodiment, the mouth opening insertion protrusion 15 is the pouring of the first embodiment. Rather than being supported by the support beam portions 16 spanned on the inner wall surfaces on both sides of the opening portion 11a of the extraction cylinder 11 like the cap 10, the opening portion 11a of the extraction cylinder 11 is in the radial direction. It is supported by a cantilevered support beam 41 provided in a cantilevered manner from the inner wall surface of the portion located on the opposite side toward the center side of the dispensing tube 11 and extends in the longitudinal direction of the dispensing tube 11. Provided. In the pouring cap 40 of the second embodiment, the same components as those of the pouring cap 10 of the first embodiment are denoted by the same reference numerals as those of the pouring cap 10 of the first embodiment. Detailed description thereof will be omitted.

  Also with the pouring cap 40 of the second embodiment, the pouring cylinder 11 is supported on the intermediate portion in the vertical direction from the inner surface of the pouring tube 11 and is disposed at the intermediate portion in the width direction of the opening portion 11a. By providing the mouth opening insertion protrusion 15 extending in the longitudinal direction of the outlet cylinder 11, the same effect as the extraction cap 50 of the first embodiment is exhibited.

  The present invention is not limited to the above-described embodiments, and various modifications can be made. For example, the mouth opening insertion protrusion does not necessarily have a shape in which the protrusion width is gradually narrowed toward the distal end side, and may have a shape in which the refill outflow opening can be easily inserted. Further, the inner side surface and the outer side surface of the mouth opening insertion protrusion do not necessarily have to have a V-shaped or arc-shaped cross-sectional shape. Furthermore, the support beam portion does not necessarily have to be passed over the inner wall surface with the opening portion interposed therebetween, and may be provided only on one side. Further, the support beam portion may extend to the bottom wall direction instead of spanning a part of the open portion. Furthermore, the pouring cap does not necessarily need to be fitted and fitted inside the mouth part of the container body, and has, for example, a fitting skirt wall having a female thread ridge formed on the inner peripheral surface. The female thread ridges of the mounting skirt wall may be detachably mounted on the mouth part of the container body by screwing the female thread ridges on the outer peripheral surface of the mouth part of the container body.

DESCRIPTION OF SYMBOLS 10,40 Outlet cap 11 Outlet cylinder 11a Opening part 11b Overhang guide wall part 11c Upper surface opening part 12 Inner cylinder wall 12a Toroidal flange part 12b Tapered reduced diameter part 13 Bottom wall 14 Outlet 15 Outlet opening insertion protrusion 15a Ridge part 16 Support beam part 17 Mounting slit 20 Refill container 21 Container body 21a Mouth part 30 Refill pouch 30a Mouth part 30b Refill outflow opening 41 Cantilever support beam part X Opposite to opening part

Claims (6)

A pouring cap having a pouring tube with an open portion formed on the side surface, attached to the mouth of the container body and pouring the content liquid from the pouring tube,
The inner wall of the container body is disposed along the inner peripheral surface of the mouth portion, and the bottom wall of the inner cylinder wall is provided continuously to the lower end of the container body,
The pouring tube is provided upright from the bottom wall so as to be separated from the inner tube wall, and an outlet is formed in an inner region of a base end portion of the pouring tube connected to the bottom wall. Has been
A mouth opening that is supported by the inner surface of the dispensing cylinder at the middle portion in the vertical direction of the dispensing cylinder and that is disposed at the intermediate portion in the width direction of the opening and extends in the longitudinal direction of the dispensing cylinder. Insertion protrusion is provided,
Between auxiliary guide wall portions provided on both sides of the mouth opening insertion protrusion so as to sandwich the mouth opening insertion protrusion and extending in the longitudinal direction along the inner wall surface of the extraction tube In addition, a mounting slit whose width is narrowed downward is formed,
When refilling the content liquid from the refill pouch into the container body, the mouth opening insertion protrusion is inserted into the refill outflow opening formed in the mouth portion of the refill pouch, and the refill outflow opening is opened. A pouring cap in which the closed state is maintained and the mouth portion is positioned.   The mouth opening insertion protrusion is supported by supporting beam portions provided across the open portion and spanned on the inner wall surfaces on both sides of the open portion of the extraction tube, The pouring cap according to claim 1, which is provided so as to extend in the longitudinal direction.   The pouring cap according to claim 1, wherein the mouth opening insertion protrusion has a shape in which a protrusion width facing the opening portion is gradually narrowed toward a tip end side.   The pouring cap according to any one of claims 1 to 3, wherein the mouth opening insertion protrusion is provided so that the entirety thereof is accommodated in an inner region of the pouring tube. The pouring cap according to any one of claims 1 to 3, wherein the mouth opening insertion protrusion has a V-shaped or arc-shaped cross-sectional shape whose inner side surface is recessed in a concave shape.   The mouth opening insertion protrusion has a V-shaped cross-sectional shape in which an outer surface of the mouth opening insertion protrusion is formed with an edge-shaped ridge line portion extending in a vertical direction at a central portion in the width direction. The extraction cap according to any one of the preceding claims.

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