Plug body for refill container and refill container comprising the same

Abstract

To provide a plug body for a refill container that is excellent in easiness and safety in operation during refilling and can make both leakproof performance and sealability of contents compatible, and a refill container comprising the same.SOLUTION: A plug body for a refill container according to the present invention is constituted of a plug main body 10 and a plug cover 20 detachably attached to the main body. The plug main body 10 comprises an outflow tube 11, a tubular outer wall 13 and an attachment tube 15, which further comprises insertion ports 16 in at least two positions in a top surface board 12. The plug cover 20 comprises an attachment wall surface part 27 that closely attaches to the attachment tube 15, a closing plate part 23 and push-in convex parts 26 in at least two positions. A compression seal member 19, which can be crushed and deformed by a tip portion of a mouth / neck part 7 of the refill container, is arranged in the top surface board 12. The plug cover 20 is attached to the plug main body 10, in a state where tip portions of the push-in convex parts 26 are protruded from the top surface board 12 through the insertion ports 16.SELECTED DRAWING: Figure 12

Description

[Technical field]

[0001] The present invention relates to a plug for a refillable container and a refillable container equipped with the plug. [Background technology]

[0002] Containers for storing contents such as liquid detergents and shampoos are generally used repeatedly by refilling the contents. The refillable container, which is the container for the contents, can be used for a long period of time by refilling the contents from the refilling container.

[0003] The refilling operation of the contents using a refill container is performed by connecting the neck part of the refill container, which has an outlet for the contents, to the neck part of the refilled container. From the viewpoint of facilitating such a refilling operation, the applicant has previously proposed a refill container plug that can be attached to cover the refill outlet of the refill container (for example, Patent Document 1 and Patent Document 2). The refill container stopper body of Patent Document 1 comprises a stopper body having an outflow tube and an attachment tube, and a stopper lid having an attachment wall portion that fits tightly against the inner surface of the attachment tube, a blocking plate portion, and a push-in protrusion, and the stopper lid is attached to the stopper body in a state in which the push-in protrusion protrudes outward in the outflow direction through an insertion hole that is formed by cutting out from the opening periphery of the outflow opening to the radial outside of the outflow tube, and a portion of the tip surface of the push-in protrusion is positioned radially outward from the outer circumferential surface of the outflow tube.

[0004] The plug for a refill container in Patent Document 2 comprises a plug body having an outflow tube, a cylindrical outer wall, and an attachment tube, and a plug lid having an attachment wall portion that is in close contact with the inner surface of the attachment tube, a blocking plate portion, and a push-in convex portion, the push-in convex portion protruding outward in the outflow direction from the top plate of the plug body and a part of the tip surface of the push-in convex portion being positioned radially outward from the outer surface of the outflow tube, thereby allowing the plug lid to be attached to the plug body, and air replacement during refilling is performed through the insertion port and the outside air communication port after the push-in convex portion is pushed out. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent No. 6183846 [Patent Document 2] Patent No. 6183847 Summary of the Invention [Problem to be solved by the invention]

[0006] In the refilling operation, the neck of the refill container is turned downward and the refill container is in an inverted state. When refilling in an inverted state, it is generally time-consuming to align the necks of the refill container and the refilled container, and it is necessary to support both the refill container and the refilled container to prevent them from falling over. In addition, the contents flowing out from the neck of the inverted refill container are more likely to leak out of the refill container and the refilled container. The techniques described in Patent Documents 1 and 2 have room for improvement in terms of ease and stability of the refilling operation. In addition, if the sealing property of the refill container is improved to prevent leakage of the contents during refilling, there is a risk that the ease of opening the container may decrease.

[0007] The present invention relates to a plug for a refillable container, which is excellent in ease and stability of refilling operation, and which is capable of preventing leakage of the contents while being easy to open, and a refillable container equipped with the plug. [Means for solving the problem]

[0008] The present invention relates to a refillable container plug that is attached to cover a refill outlet of a refillable container for refilling contents into the refillable container having a neck portion. It is preferable that the refill container comprises a plug body which is joined and fixed to the peripheral portion of the opening of the refill outlet, and a plug cover which is removably attached to the plug body and closes the outlet opening formed in the top panel of the plug body from the inside in the outflow direction. It is preferable that the plug body comprises an outflow tube surrounding the outflow opening and protruding outward in the outflow direction from the top plate, a cylindrical outer wall arranged concentrically with the outflow tube, surrounding the outflow tube and protruding outward in the outflow direction from the top plate, and having an inner diameter corresponding to the outer diameter of the neck portion of the refillable container, and an attachment tube arranged concentrically with the outflow tube, surrounding the outflow opening and protruding inward in the outflow direction from the top plate. The plug body preferably has at least two insertion holes formed in the top panel in the gap between the outflow tube and the cylindrical outer wall. It is preferable that the plug cap has a mounting wall portion whose outer surface is in close contact with the inner surface of the mounting tube, a closure plate portion having a planar shape similar to the hollow cross-sectional shape of the mounting tube, and at least two push-in protrusions extending from portions of the peripheral portion of the closure plate portion corresponding to the insertion hole of the plug body. It is preferable that a compression sealing material is arranged along the outer peripheral portion of the insertion opening on the surface of the top panel from which the outflow tube and the cylindrical outer wall protrude, which can be crushed and deformed by the tip of the neck portion of the refillable container which is pressed into the gap between the outflow tube and the cylindrical outer wall. It is preferable that the plug cover is attached to the plug body with the tip of the push-in protrusion protruding outward in the outflow direction from the top plate through the insertion hole in the gap between the outflow tube and the cylindrical outer wall.

[0009] The present invention also relates to a refillable container for refilling contents into a refillable container having a neck portion. The refill container preferably includes a refill plug adapted to be fitted over the refill outlet. It is preferable that the plug body for the refill container comprises a plug body which is joined and fixed to the opening peripheral portion of the refill outlet, and a plug cover which is removably attached to the plug body and closes the outlet opening formed in the top panel of the plug body from the inside in the outflow direction. It is preferable that the plug body comprises an outflow tube surrounding the outflow opening and protruding outward in the outflow direction from the top plate, a cylindrical outer wall arranged concentrically with the outflow tube, surrounding the outflow tube and protruding outward in the outflow direction from the top plate, and having an inner diameter corresponding to the outer diameter of the neck portion of the refillable container, and an attachment tube arranged concentrically with the outflow tube, surrounding the outflow opening and protruding inward in the outflow direction from the top plate. The plug body preferably has at least two insertion holes formed in the top panel in the gap between the outflow tube and the cylindrical outer wall. It is preferable that the plug cap has a mounting wall portion whose outer surface is in close contact with the inner surface of the mounting tube, a closure plate portion having a planar shape similar to the hollow cross-sectional shape of the mounting tube, and at least two push-in protrusions extending from portions of the peripheral portion of the closure plate portion corresponding to the insertion hole of the plug body. It is preferable that a compression sealing material is arranged along the outer peripheral portion of the insertion opening on the surface of the top panel from which the outflow tube and the cylindrical outer wall protrude, which can be crushed and deformed by the tip of the neck portion of the refillable container which is pressed into the gap between the outflow tube and the cylindrical outer wall. It is preferable that the plug cover is attached to the plug body with the tip of the push-in protrusion protruding outward in the outflow direction from the top plate through the insertion hole in the gap between the outflow tube and the cylindrical outer wall. Effect of the Invention

[0010] The refillable container stopper and the refillable container equipped with the same of the present invention provide excellent ease and stability of refilling operation, while also achieving both leak-proofing of the contents and ease of opening. [Brief description of the drawings]

[0011] [Figure 1] FIG. 1 is a front view showing one embodiment of a refill container according to the present invention. [Diagram 2]FIG. 2 is a cross-sectional view taken along the outflow direction, showing the neck of the refillable container of FIG. 1 and a plug for a refillable container attached to cover the outflow port of the neck. [Diagram 3] FIG. 3 is a perspective view of the refill container plug of FIG. 2 as viewed from the outside in the outflow direction. [Figure 4] FIG. 4 is a perspective view of the plug lid of the refillable container plug of FIG. 3, viewed from the outside in the outflow direction. [Diagram 5] FIG. 5 is an enlarged cross-sectional view of the push-in protrusion shown in FIG. 4 taken along the outflow direction. [Figure 6] FIG. 6 is a perspective view of the plug cap shown in FIG. 4 as viewed from the inside in the outflow direction. [Figure 7] FIG. 7 is a cross-sectional perspective view of the plug body shown in FIG. 3 as viewed from the outside in the outflow direction. [Figure 8] FIG. 8 is a cross-sectional view of the plug body shown in FIG. 7 taken along the outflow direction. [Figure 9] FIG. 9 is a perspective view of the plug body shown in FIG. 7 as viewed from the inside in the outflow direction. [Figure 10] 10 is a cross-sectional perspective view of the plug body shown in FIG. 7 as viewed from the inside in the outflow direction. [Figure 11] FIG. 11 is a perspective view and a sectional perspective view for explaining a refilling operation in which the refill container of FIG. 1 is used to refill a content into a refill container. [Figure 12] 12(a) and (b) are enlarged cross-sectional views of the plug cap and the vicinity of the insertion hole during extrusion. [Figure 13] 13(a) and (b) are views corresponding to FIG. 12, showing another embodiment of a plug for a refill container according to the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] The present invention will be described below based on preferred embodiments with reference to the drawings. Fig. 1 shows one embodiment of a refill container of the present invention. The refill container 5 of this embodiment contains contents such as lotion, milky lotion, etc., and is a refill container for refilling the contents into a refillable container.

[0013] The refillable container 5 of this embodiment is a thin-walled bottle-shaped container, and includes a body 2 having a bottom, a neck 4 having a refill outlet for discharging the contents, and a shoulder 3 located between the neck 4 and the body 2. The refillable container 5 shown in FIG. 1 is in a self-supporting state with the bottom of the body 2 placed on a horizontal surface. In this state, the neck 4 is located vertically upward and is disposed opposite the bottom of the body 2. The neck 4 is a cylindrical part having a flow path therein for the contents to flow out, and has openings at both ends in the central axis direction. One opening in the central axis direction of the neck 4 is a refill outlet for the contents to flow out. The inside of the neck 4 is connected to the inside of the shoulder 3 via the other opening of the neck 4. As shown in Fig. 1, when the refill container 5 is in a self-supporting state, the shoulder 3 has an opening at the center of the upper vertical side and a truncated cone shape that spreads horizontally and descends from the periphery of the opening. In addition, in this self-supporting state, the body 2 has a cylindrical peripheral wall that hangs down from the entire periphery of the lower end of the shoulder 3, and a bottom located at the lower end of the peripheral wall. The refill container 5 has an internal space defined by the shoulder 3 and the body 2, and contents such as lotion, milky lotion, etc. are stored in the internal space.

[0014] In the refill container 5 of this embodiment, the central axis direction coincides with the outflow direction V of the contents when the contents are flowed out from the container 5 to the outside. In the freestanding state shown in Fig. 1, the vertical direction Z coincides with the outflow direction V of the contents in the refill container 5. Hereinafter, the outflow direction V of the contents will be simply referred to as the "outflow direction V" in this specification. The outside of this outflow direction V will be referred to as the "tip side", and the inside of the outflow direction V will be referred to as the "end side".

[0015] The refillable container 5 of this embodiment is equipped with a refillable container plug 1 (hereinafter also simply referred to as "plug 1") that is attached to cover the refillable outlet of the neck 4. The plug 1 of this embodiment is fixed to the neck 4 while sealing the refillable outlet of the neck 4, and has the function of connecting the refillable outlet to the refillable neck 7 by connecting the neck 4 of the refillable container 5 (hereinafter also referred to as "refillable neck 4") to the neck 7 of the refillable container 6 (hereinafter also referred to as "refillable neck 7"). The details of such a refillable operation will be described later.

[0016] As shown in Figure 2, the plug 1 is made up of a plug body 10 which is joined and fixed to the opening peripheral portion 4a of the refill outlet in the refill neck 4, and a plug lid 20 which is detachably attached to the plug body 10. The plug 1 is attached to the refill neck 4 with the plug lid 20 attached to the plug body 10. Hereinafter, the "opening peripheral portion of the refill outlet in the refill neck 4" will also be referred to as the "outlet peripheral portion 4a".

[0017] As shown in FIG. 4, the plug 20 includes a closure plate 23, a cylindrical mounting wall 27 that protrudes outward in the outflow direction V from the peripheral portion of the closure plate 23, and a push-in protrusion 26 that stands outward in the outflow direction V from the peripheral portion of the closure plate 23. In the plug 20 of this embodiment, the mounting wall 27 is formed on the peripheral portion of the closure plate 23, so that the push-in protrusion 26 protrudes outward in the outflow direction V from the mounting wall 27 (see FIG. 2). The push-in protrusion 26 forms a columnar portion that stands outward from the mounting wall 27. The mounting wall 27 has the same outer diameter as the closure plate 23.

[0018] The plug 20 has at least two push-in protrusions 26. As shown in Fig. 4, the plug 20 of this embodiment has four push-in protrusions 26a, 26b. The number of push-in protrusions 26 provided on the plug lid 20 is at least two, but is not particularly limited as long as it is two or more, and may be four as in this embodiment.

[0019] Fig. 5 shows a cross section of the push-in protrusion 26 of this embodiment along the outflow direction V. The cross-sectional structure shown in Fig. 5 is common to the four push-in protrusions described above, except for the openings described below. Each of the pushing convex portions 26 of this embodiment has a tip reduced diameter portion 61 forming a tip portion, a base end large diameter portion 63 forming a base end portion on the mounting wall surface portion 27 side, and an intermediate medium diameter portion 62 located between the tip reduced diameter portion 61 and the base end large diameter portion 63 in the outflow direction V. In the pushing convex portion 26, the tip reduced diameter portion 61 has a minimum outer diameter, and the base end large diameter portion 63 has a maximum outer diameter. The outer diameter of the intermediate medium diameter portion 62 is larger than the outer diameter of the tip reduced diameter portion 61 and smaller than the outer diameter of the base end large diameter portion 63. That is, when the pushing convex portion 26 of this embodiment is viewed along the outflow direction V, the outer diameter decreases stepwise from the base end side toward the tip end side.

[0020] The mounting wall portion 27 in this embodiment has a wall bulge 27a (see FIG. 5) that bulges outward in the radial direction on the outer surface on the inner side of the outflow direction V, i.e., on the outer peripheral surface on the side (opposite side) away from the push-in protrusion 26. The wall bulge 27a is formed in an annular shape along the outer peripheral surface of the mounting wall portion 27, as shown in FIG. The mounting wall portion 27 in this embodiment has an annular wall recess 28 that opens to the inside in the outflow direction V (see Figs. 5 and 6). Such a mounting wall portion 27 has a double structure with the part on the inside of the outflow direction V sandwiching the wall recess 28. With this configuration, when the plug 20 is pushed out in the refilling operation described below, the outer part of the wall recess 28 in the mounting wall portion 27 is more likely to bend radially inward, making the operation of pushing out the plug 20 easier. The wall surface inner recess 28 overlaps with the wall surface bulge 27a in the outflow direction V. This makes it easier to release the tight contact between the mounting wall surface portion 27 and the inner circumferential surface of the mounting cylinder 15, which will be described later.

[0021] The plug lid 20 of this embodiment has a rib 24 that crosses the surface in the radial direction on the surface on the inner side of the outflow direction V of the closure plate portion 23. The surface on the inner side of the outflow direction V of the closure plate portion 23 is the surface opposite to the side on which the push-in protrusion 26 is erected, and forms the bottom surface of the closure plate portion 23. The rib 24 protrudes inward from the bottom surface of the closure plate portion 23 in the outflow direction V, and has a linear shape that passes through the center part of the closure plate portion 23 and reaches the periphery (contour) of the bottom surface of the closure plate portion 23 at both ends (see FIG. 6). Even if the plug lid 20 detached from the plug body 10 covers the outflow opening 11a with the bottom surface facing up due to the refilling operation described later, a gap is generated between the outflow opening 11a and the plug lid 20 due to the presence of the rib 24, so that the contents can be refilled through the gap.

[0022] The plug 20 of this embodiment has an inner cylindrical protrusion 21 and an outer cylindrical protrusion 22 on the surface (hereinafter also referred to as the "upper surface") of the closure plate 23 on the outward side in the outflow direction V, i.e., on the surface on the side on which the push-in protrusion 26 is erected (see Figs. 2 to 4). These cylindrical protrusions 21, 22 protrude outward in the outflow direction V from the upper surface of the closure plate 23 and are arranged concentrically with the mounting wall surface 27. In the closure plate 23 of this embodiment, the outer cylindrical protrusion 22 surrounds the inner cylindrical protrusion 21, and the mounting wall surface 27 surrounds the outer cylindrical protrusion 22. The inner cylindrical protrusion 21 and the outer cylindrical protrusion 22 have approximately the same protruding length, and the protruding length is shorter than that of the mounting wall surface 27. Alternatively, the plug 20 may have no protrusion on the upper surface of the closure plate 23, and the upper surface may be flat.

[0023] When the plug lid 20 is attached to the plug body 10, the inner cylindrical convex portion 21 and the outer cylindrical convex portion 22 are arranged radially inward of the plug body 10 relative to the outflow tube 11 (see Figures 2 and 3). Even if the plug lid 20 detached from the plug body 10 covers the outflow opening 11a with the bottom facing up due to the refilling operation described below, the cylindrical protrusions 21, 22 interfere with the upper surface of the blocking plate 23, making it difficult for the contents to remain on the upper surface, and even if the contents do remain, they will accumulate inside these cylindrical protrusions 21, 22. This makes it possible to prevent the contents remaining in the plug lid 20 from spilling out from the refilling neck 4 when the connection between the refillable neck 4 and the refilled neck 7 via the plug 1 is released.

[0024] As shown in Figures 3, 7 and 8, the plug body 10 comprises a top plate 12 and an outflow opening 11a formed in the top plate 12. The plug body 10 comprises an outflow tube 11 surrounding the outflow opening 11a and protruding outward in the outflow direction V from the top plate 12, and a cylindrical outer wall 13 arranged concentrically with the outflow tube 11 and surrounding the outflow tube 11 and protruding outward in the outflow direction V from the top plate 12. In other words, the outflow tube 11 is formed to surround the periphery of the outflow opening 11a, and the cylindrical outer wall 13 surrounds the outflow tube 11.

[0025] The outflow tube 11 and the cylindrical outer wall 13 have their inner ends in the outflow direction V connected to a top plate 12 , and the top plate 12 is located between the outflow tube 11 and the cylindrical outer wall 13 . The cylindrical outer wall 13 has an inner diameter corresponding to the outer diameter of the refillable neck part 7. With regard to the cylindrical outer wall 13, "an inner diameter corresponding to the outer diameter of the refillable neck part 7" means that the inner diameter of the cylindrical outer wall 13 is substantially the same as the outer diameter of the refillable neck part 7 (see FIG. 11). In this embodiment, a female thread ridge 13a for screwing with the refillable neck part 7 is formed on the inner peripheral surface of the cylindrical outer wall 13. In this embodiment, by screwing the cylindrical outer wall 13 of the plug 1 with the refillable neck part 7, the refillable neck part 4 and the refillable neck part 7 can be detachably connected via the plug 1.

[0026] 3, 7 and 8, the plug body 10 has an insertion hole 16 formed in the top panel 12 in the gap between the outflow tube 11 and the cylindrical outer wall 13. The plug body 10 has at least two insertion holes 16. The insertion hole 16 is a portion into which the push-in protrusion 26 of the plug lid 20 is inserted (see FIG. 3), and is a through hole that penetrates the top panel 12.

[0027] As shown in Figs. 8 to 10, the plug body 10 includes a mounting tube 15 that is disposed concentrically with the outflow tube 11 and that surrounds the outflow opening 11a and protrudes inward in the outflow direction V from the top panel 12. As shown in Figures 8 to 10, the plug body 10 of this embodiment has an insertion partition wall 18 that protrudes inward in the outflow direction V from the top panel 12. The insertion partition wall 18 is a columnar portion in which a portion of the periphery of the insertion opening 16 protrudes inward in the outflow direction V (see Figures 9 and 10). The mounting tube 15 protrudes inward in the outflow direction V beyond the insertion partition wall 18. The mounting cylinder 15 is formed radially outward from the insertion opening 16. In this embodiment, the insertion opening 16 is located between the insertion partition wall 18 and the mounting cylinder 15.

[0028] The plug body 10 of this embodiment is equipped with an outer mounting tube 14 that surrounds the mounting tube 15 and protrudes inward in the outflow direction V from the peripheral portion of the top plate 12. The mounting tube 15 and the outer mounting tube 14 that surrounds the mounting tube 15 are connected together, with the top plate 12 protruding radially inward from the mounting tube 15. The outer mounting tube 14 has an inner rib 14a on its inner circumferential surface that protrudes radially inward (see FIG. 8). The inner rib 14a is formed in an annular shape along the inner circumferential surface of the outer mounting tube 14. The plug body 10 of this embodiment has a space between the attachment tube 15 and the outer attachment tube 14 on the inside of the outflow direction V. In this embodiment, the plug body 10 is fitted to the outlet peripheral portion 4a by driving the plug body 10 into the outlet peripheral portion 4a with the outlet peripheral portion 4a of the refill neck portion 4 inserted between the attachment tube 15 and the outer attachment tube 14. This allows the plug body 10 (plug body 1) to be attached and fixed to the refill neck portion 4. A rib (not shown) protruding radially outward is formed on the outer peripheral surface of the outlet peripheral portion 4a of this embodiment. This rib engages with the inner rib 14a of the outer attachment tube 14, allowing the plug body 10 to be attached and fixed to the refill neck portion 4 (see FIG. 2). The plug 1 may be attached and fixed to the refill neck portion 4 by a screw-fitting method instead of a fitting method.

[0029] Hereinafter, the surface of the top panel 12 from which the outflow tube 11 and the cylindrical outer wall 13 protrude is also referred to as the "outflow side surface." As shown in Figs. 2 and 8, the top panel 12 of this embodiment has a flat outflow side surface. A compressed seal material 19 is disposed on the outflow side of the top panel 12 of the plug body 10. The compressed seal material 19 is disposed along the outer peripheral portion of the insertion opening 16 (see Figs. 7 and 8). In this embodiment, the outer peripheral portion of the insertion opening 16 is arc-shaped, and the compressed seal material 19 is disposed along this arc portion. The compressed seal material 19 is located radially outward of the insertion opening 16, and is disposed along and adjacent to the outer peripheral portion of the insertion opening 16. The surface of the compressed seal material 19 on the insertion opening 16 side is substantially continuous with the outer inner peripheral surface of the insertion opening 16. The compression seal material 19 of this embodiment is fixed to the outflow side surface of the top panel 12 by a known joining means such as an adhesive.

[0030] The compressible seal material 19 is capable of being crushed and deformed in the outflow direction V. As a material for forming the compressible seal material 19, any material capable of being crushed and deformed can be used without any particular limitation, and examples of such a material include elastic bodies capable of being elastically deformed, such as rubber products and elastomer products, and foams. Examples of the elastic body include rubber meshes made from rubber-like materials such as natural rubber, synthetic rubber, silicone rubber, acrylic rubber, urethane rubber, and nitrile rubber, various rubber sheets, and foamed rubber (rubber sponge). Examples of foams include those made from raw materials such as polyethylene, polyurethane, wet urethane, acrylonitrile-butadiene copolymer (NBR), styrene-butadiene copolymer (SBR), natural rubber (NR), ethylene-propylene-diene copolymer (EPDM), melamine foam, polyvinyl alcohol (PVA), and cellulose. The material forming the compression seal material 19 may be the same as the material forming the top panel 12 .

[0031] 2 and 3, in the plug 1, the plug lid 20 is attached to the plug body 10 in a state in which the tip portion of the push-in protrusion 26 protrudes outward in the outflow direction V from the top panel 12 through the insertion hole 16 in the gap between the outflow tube 11 and the cylindrical outer wall 13. In the plug lid 20, the push-in protrusion 26 stands upright from a portion corresponding to the insertion hole 16 of the plug body 10. In other words, the push-in protrusion 26 located at the portion corresponding to the insertion hole 16 is inserted into the insertion hole 16, thereby attaching the plug lid 20 to the plug body 10. In the present embodiment, when the plug cap 20 is attached to the plug body 10, the tip reduced diameter portion 61 forming the tip portion is located outward in the outflow direction V from the insertion opening 16, and the intermediate medium diameter portion 62 is inserted into the insertion opening 16 (see FIG. 12(a)). The base end large diameter portion 63 abuts against the surface of the top panel 12 on the inner side in the outflow direction V (not shown). This restricts the push-in protrusion 26 from being inserted further outward in the outflow direction V. The insertion of the push-in protrusion 26 outward in the outflow direction V may be restricted by other portions, such as the abutment between the insertion partition wall 18 and the closure plate portion 23. The horizontal cross-sectional shape of the intermediate medium diameter portion 62 approximately matches the planar shape of the insertion opening 16. In addition, the size of the horizontal cross section of the intermediate medium diameter portion 62 approximately matches the size of the insertion opening 16. As a result, when the plug cover 20 is attached to the plug body 10, the insertion opening 16 is closed by the intermediate medium diameter portion 62. When the plug 20 is attached to the plug body 10, the pushing protrusion 26 is inserted into the insertion opening 16, closing the insertion opening 16. Hereinafter, this state will also be referred to simply as the "attached state." In the attached state, the tip portion of the pushing protrusion 26 protrudes outward in the outflow direction V from the top panel 12 through the insertion opening 16 .

[0032] When attached, the plug lid 20 blocks the outflow opening 11a formed in the top panel 12 of the plug body 10 from the inside in the outflow direction V, and also blocks the insertion opening 16 from the inside in the outflow direction V by inserting the push-in protrusion 26. The closure plate portion 23 has a planar shape similar to the hollow cross-sectional shape of the mounting tube 15. In the mounted state of the plug lid 20 having these configurations, the inside of the mounting tube 15 including the outflow opening 11a of the top plate 12 is closed by the closure plate portion 23, and is liquid-tightly sealed by the close contact between the mounting wall portion 27 and the mounting tube 15. Specifically, in the mounted state, the outer peripheral surface of the mounting wall portion 27 of the plug lid 20 is in close contact with the inner peripheral surface of the mounting tube 15. In this embodiment, the mounting wall portion 27 has a wall bulge portion 27a formed on its outer peripheral surface, so that the wall bulge portion 27a is in a state of being pressed against the inner peripheral surface of the mounting tube 15 (see FIG. 11). The "pressed state" means a state in which the wall bulge portion 27a is pressed against the inner peripheral surface of the mounting tube 15. This makes it possible to prevent the contents from leaking out of the refill container 5 even when the refill container 5 is inverted with the refill neck portion 4 facing vertically downward.

[0033] The refilling operation using the refillable container 5 of this embodiment will be described with reference to Figure 11. The refillable container 6, into which the contents are filled, is provided with a refillable neck part 7 having an opening communicating with the storage space for the contents. Such neck part 7 is also a cylindrical part having an internal flow path through which the contents are filled. In this embodiment, the refillable container 6 is a bottle-shaped container like the refillable container 5, and is provided with a shoulder part and a body part that form the storage space for the contents together with the refillable neck part 7. A male thread ridge (not shown) is formed on the outer peripheral surface of the refillable neck part 7.

[0034] In the refilling operation, as shown in FIG. 11, the refillable container 5 is inverted with the refillable neck 4 facing downward in the vertical direction Z. On the other hand, the refillable container 6 is in a self-supporting state with the refillable neck 7 facing upward in the vertical direction Z. Next, the plug body 1 and the refillable neck 7 are screwed together to join the refillable neck 4 and the refillable neck 7. Specifically, the female thread ridge 13a formed on the inner peripheral surface of the aforementioned cylindrical outer wall 13 is screwed together with the male thread ridge formed on the outer peripheral surface of the refillable neck 7. In this screwing operation, the refillable neck 7 is inserted into the gap between the outflow tube 11 of the plug body 10 and the cylindrical outer wall 13, and the refillable neck 7 is pushed upward in the vertical direction Z (inward in the outflow direction V) while rotating the refillable container 5 around the central axis. As a result, the push-in protrusion 26 is pushed upward in the vertical direction Z (inward in the outflow direction V) by the top surface of the refillable neck portion 7. Accordingly, the closure plate portion 23 is also pushed upward in the vertical direction Z (inward in the outflow direction V), so that the closure by the closure plate portion 23 is released and the interior of the attachment tube 15 including the outflow opening 11a communicates with the storage space for the contents in the refillable container 5. As a result, the contents stored in the refillable container 5 flows out through the outflow tube 11 into the refillable container 6, and the refillable container 6 can be filled with the contents. Then, the refillable neck portion 7 is pushed further upward in the vertical direction Z (inward in the outflow direction V), and when the top surface of the refillable neck portion 7 reaches the top plate 12, the pushing protrusion 26 is pushed completely out of the insertion port 16, the plug cap 20 detaches from the plug body 10, and the closure of the insertion port 16 by the pushing protrusion 26 is released (not shown).

[0035] The refilling operation using the refillable container 5 of this embodiment can be performed by a simple operation of connecting the refillable neck part 4 and the refillable neck part 7 via the plug 1. In this operation, as described above, the refillable neck part 7 is pushed inward in the outflow direction V along the inner circumferential surface of the cylindrical outer wall 13. At this time, since the cylindrical outer wall 13 has an inner diameter corresponding to the outer diameter of the refillable neck part 7, the refillable neck part 4 and the refillable neck part 7 can be connected while the refillable neck part 7 is in close contact with the cylindrical outer wall 13. As a result, even if the blockage of the outflow opening 11a by the plug lid 20 is released, the cylindrical outer wall 13 can effectively suppress leakage of the contents to the outside.

[0036] In the above-mentioned refilling operation, when the refillable neck part 7 is pushed into the gap between the outflow tube 11 and the cylindrical outer wall 13, the tip of the refillable neck part 7 reaches the compressed seal material 19 arranged in the gap, and the compressed seal material 19 is also pushed in (see Figs. 12(a) and (b)). The pushed in compressed seal material 19 is crushed inward in the outflow direction V, and the pushing convex part 26 is also pushed out from the insertion opening 16 by the tip of the refillable neck part 7. That is, since the refillable neck part 7 is pushed in while the compressed seal material 19 is crushed, the pushing convex part 26 can be removed from the insertion opening 16 with the tip of the refillable neck part 7 and the compressed seal material 19 in close contact. As a result, the compressed seal material 19 prevents a gap from being generated between the pushing convex part 26 and the insertion opening 16, so that the refillable container 5 can be opened while maintaining a liquid-tight seal. That is, leakage of the contents is prevented.

[0037] The compression seal material 19 in this embodiment is a packing material made of an elastic material, and is a separate member from the plug body 10. This configuration can further improve the leakage prevention of the contents. In addition, the material of the compression seal material 19 can be easily changed according to the viscosity or permeability of the contents.

[0038] The compressed seal material 19 may be disposed along the outer peripheral portion of the insertion opening 16, or may be disposed only along the peripheral portion. In order to facilitate the pushing out of the push-in protrusion 26 by the tip of the refillable opening neck portion 7 during the above-mentioned refilling operation and to improve the ease of opening the plug 20, it is preferable that the compressed seal material 19 is disposed continuously in a circular ring shape including an arc portion along the outer peripheral portion of the insertion opening 16 (see FIG. 7). The compressed seal material 19 in this embodiment is located between the cylindrical outer wall 13 and the insertion openings 16, and has a circular ring shape that continues around the entire circumference of the top panel 12 so as to surround all of the insertion openings 16. In other words, assuming a circle defined by the gap between the outflow tube 11 and the cylindrical outer wall 13, the compressed seal material 19 continues around the entire circumference of the circle. This makes it easier for the tip of the refillable neck part 7 to come into contact with the compressed seal material 19 during the refilling operation, making it easier to push out the push-in protrusion 26.

[0039] From the viewpoint of more reliably squashing the compressible seal material 19 and further improving the leak prevention property, the amount of squashing of the compressible seal material 19 is preferably 0.2 mm or more and 2 mm or less, and more preferably 0.4 mm or more and 0.8 mm or less. The amount of crushing of the compressed sealing material 19 is the difference between the thickness of the compressed sealing material 19 before compression and the thickness of the compressed sealing material 19 after compression. The "thickness of the compressed sealing material 19 after compression" is the same as the gap between the refillable neck part 7 and the top panel 12 when the push-in protrusion 26 is pushed out of the insertion opening 16 by the pushing-out of the refillable neck part 7 during the refilling operation.

[0040] In order to achieve a better balance between preventing leakage of the contents and ease of opening, the length of the compressed seal material 19 in the flow direction V, i.e., the thickness of the compressed seal material 19, is preferably 0.3 mm or more and 2.5 mm or less, and more preferably 1.0 mm or more and 1.5 mm or less.

[0041] In the attached state, the outer peripheral surface of the attachment wall portion 27 is in close contact with the inner peripheral surface of the attachment tube 15, but as the plug 20 is pushed out during the refilling operation, this close contact is released. In the attachment wall portion 27 of this embodiment, when the wall bulge portion 27a moves inward in the outflow direction V beyond the tip of the attachment tube 15 due to the plug 20 being pushed out (see FIG. 12(b)), the close contact between the wall bulge portion 27a and the inner peripheral surface of the attachment tube 15 is released, and the contents flow out between the outflow tube 11 and the attachment tube 15.

[0042] As the plug cap 20 is further pushed out, the tight contact with the push-in protrusion 26 is released from the insertion port 16. In this embodiment, when the intermediate medium diameter portion 62 is pushed out from the insertion port 16, the tip reduced diameter portion 61 is inserted into the insertion port 16. From the viewpoint of further improving the ease of opening the plug 20, it is preferable that the tip reduced diameter portion 61 generates a gap between the insertion opening 16 and the tip portion (tip reduced diameter portion 61) of the push-in protrusion 26. This makes it easier to detach the push-out protrusion 26 from the insertion opening 16 after the tight contact between the insertion opening 16 and the push-out protrusion 26 is released. From the viewpoint of more reliably achieving such an effect and preventing leakage of the contents, the gap between the insertion opening 16 and the tip reduced diameter portion 61 is preferably 1.0 mm or more and 3.0 mm or less, more preferably 1.0 mm or more and 2.0 mm or less. When viewed along the outflow direction V, if the above gap is different, it is sufficient that the maximum value of the gap is within the above-mentioned preferable range. In the plug 1 of this embodiment, when the tip reduced diameter portion 61 is inserted into the insertion port 16, a gap is generated between the outer peripheral surface of the tip reduced diameter portion 61 and the outer inner peripheral surface of the insertion port 16 (see FIG. 12(b)). This makes it easier to push out the tip reduced diameter portion 61 from the insertion port 16.

[0043] From the viewpoint of further suppressing leakage of the contents to the outside, the contact margin where the intermediate medium diameter portion 62 and the outer inner circumferential surface of the insertion port 16 are in close contact with each other is preferably more than 0 mm and not more than 0.2 mm, more preferably 0.01 mm or more and 0.15 mm or less. Such contact margin is the length in the outflow direction V of the part where the intermediate medium diameter portion 62 and the outer inner circumferential surface of the insertion port 16 are in close contact with each other.

[0044] When the pushing protrusion 26 is completely pushed out from the insertion opening 16, the refillable container 5 and the refilled container 6 are also connected at the insertion opening 16, but air exchange between the refillable container 5 and the refilled container 6 occurs at the insertion opening 16, with the outflow opening 11a functioning as the main outflow port. That is, air exchange occurs via the insertion opening 16, and air exchange via the outflow opening 11a is suppressed. As a result, the outflow of the contents via the outflow opening 11a is not suppressed, and the contents can be efficiently refilled (filled). Furthermore, the refillable container 5 of this embodiment does not exchange air with the outside, but exchanges air with the refillable container 6 through the insertion port 16 of the stopper body 1, so leakage of the contents to the outside is effectively suppressed. In addition to the air exchange between the containers 5, 6, the stopper body 10 and the refillable container 6 are liquid-tightly joined, so that even if the refillable container 5 in an inverted state after joining and the refillable container 6 in a freestanding state fall over, leakage of the contents to the outside can be suppressed as long as the joining between the refilling neck part 4 and the refillable neck part 7 via the stopper body 1 is maintained, so the contents can be stably filled.

[0045] In the plug body 10 of this embodiment, the insertion partition wall 18 forms a part of the peripheral portion of the insertion port 16 and protrudes inward in the outflow direction V (see Figs. 9 and 10). More specifically, a part of the inner peripheral surface of the insertion port 16 extends inward in the outflow direction V from the outflow opening 11a of the plug body 10 via the insertion partition wall 18. The inner inner peripheral surface of the insertion port 16 of this embodiment extends inward in the outflow direction V via the insertion partition wall 18. This insertion partition wall 18 makes air replacement via the insertion port 16 easier than the flow of contents via the insertion port 16, and refilling and filling of the contents can be performed more efficiently. The insertion partition wall 18 in this embodiment protrudes inward in the outflow direction V along the portion of the periphery of the insertion port 16 on the outflow opening 11a side. The insertion partition wall 18 is located between the outflow opening 11a and the insertion port 16 in the radial direction of the plug body 10.

[0046] In this embodiment, the insertion partition wall 18 abuts against the closure plate portion 23 of the plug lid 20 when the plug lid 20 is attached to the plug body 10, but the insertion partition wall 18 does not have to abut against the closure plate portion 23. When the cylindrical protrusions 21, 22 are erected on the upper surface of the closure plate portion 23, from the viewpoint of facilitating the pushing out of the plug lid 20, it is preferable that the cylindrical protrusions 21, 22 are erected at positions that do not abut against the insertion partition wall 18 in the attached state. Specifically, it is preferable that the cylindrical protrusions 21, 22 are erected at positions radially inward from the outflow tube 11 when the plug lid 20 is attached to the plug body 10.

[0047] The plug body 10 preferably has a pair of insertion holes 16 formed at radially opposing positions on the top panel 12. This allows the plug lid 20 to be pushed out in a balanced manner, further improving the ease of opening the plug lid 20. The plug body 10 of this embodiment has two pairs of insertion holes 16 that face each other in the radial direction of the top panel 12, for a total of four insertion holes 16. When the plug cap 20 is attached to the plug body 10, the four push-in protrusions 26 described above are inserted into these insertion holes 16 (see FIG. 3).

[0048] The plug cap 20 of this embodiment has two pairs of push-in protrusions that have the same shape and face each other in the radial direction of the plug cap 20. One pair of push-in protrusions 26a, 26a and the other pair of push-in protrusions 26b, 26b have partially different shapes. Specifically, one pair of push-in protrusions 26a, 26a has an opening at the tip portion, and the other pair of push-in protrusions 26b, 26b does not have an opening at the tip portion (see FIG. 4). In this way, the plug cap 20 of this embodiment has at least two different shapes of push-in protrusions 26a, 26b. These one pair of push-in protrusions 26a, 26a and the other pair of push-in protrusions 26b, 26b have the same shape except for the presence or absence of an opening at the tip portion. In addition, these one pair of push-in protrusions 26a, 26a and the other pair of push-in protrusions 26b, 26b have the same size except for the tip portion. From the viewpoint of achieving a better balance between the above-mentioned leakage prevention properties and ease of opening operation, and from the viewpoint of formability of the push-in convex portion 26, it is preferable that the at least two different shapes of the push-in convex portions 26a, 26b differ in at least one of the shape and size of the tip portion.

[0049] From the viewpoint of further improving the ease of opening the plug lid 20, it is preferable that a pair of push-in protrusions 26, 26 of the same shape face each other in the radial direction of the plug lid 20 (see FIG. 4). With such a configuration, when the plug lid 20 is attached to the plug body 10 and the push-in protrusions 26 are inserted into the insertion hole 16, it is possible to more reliably prevent liquid leakage, and it is also possible to push in the push-in protrusions 26 in a well-balanced manner when removing the plug lid 20 from the plug body 10 during a refilling operation. Furthermore, when there are multiple pairs of radially opposed push-in protrusions 26 and the sizes of the push-in protrusions 26 differ among the multiple pairs, the pair of push-in protrusions 26 that is relatively large in size contributes to pushing up the plug lid 20. On the other hand, the pair of push-in protrusions 26 that is relatively small in size contributes to assisting in pushing up the plug lid 20 in parallel with the outflow direction V. This makes it possible to more effectively prevent the contents from leaking out during the refilling operation.

[0050] From the viewpoint of smoothly releasing the blockage of the outflow opening 11a by the closing plate 23 by performing the above-mentioned pushing out of the plug 20 by the refillable neck portion 7 in a balanced manner, it is preferable that the insertion holes 16 are formed at positions that equally divide the circumference of a circle defined by the gap between the outflow tube 11 and the cylindrical outer wall 13. In this case, the pushing protrusions 26 are formed at positions corresponding to the insertion holes 16 in the peripheral portion of the closing plate 23. For example, the insertion holes 16 may be formed at positions that equally divide the circumference of the circle defined by the gap in the plug body 10 into four, and the pushing protrusions 26 may be formed at positions corresponding to the insertion holes 16 in the peripheral portion of the closing plate 23. In this embodiment, the plug body 10 has two pairs of radially opposing insertion holes 16 formed in the gap portion, and the plug cover 20 has two pairs of radially opposing push-in protrusions 26 assembled together on the peripheral portion of the closure plate portion 23 (see Figure 3).

[0051] Regarding the connection between the refillable neck part 4 and the refillable neck part 7 via the stopper 1, the cylindrical outer wall 13 and the refillable neck part 7 may be engageable, but from the viewpoint of making the refillable neck part 7 less likely to be crushed during the connection, thereby further suppressing leakage of the contents, and from the viewpoint of performing the connection operation more stably, it is preferable that the cylindrical outer wall 13 and the refillable neck part 7 are screwable together. That is, it is preferable that the inner peripheral surface of the cylindrical outer wall 13 is formed with a female thread ridge 13a that screws into a male thread ridge formed on the outer peripheral surface of the refillable neck part 7. Such a configuration is preferable in that the connection between the refillable neck part 4 and the refillable neck part 7 can be easily released when air replacement occurs between the refillable container 5 and the refillable container 6 after the refilling operation. Furthermore, screwing the refillable container 5 to the inverted container 6 and the refillable container 6 to the freestanding container 6 can maintain the container 5, 6 in a good state even if the containers 5, 6 fall over after being connected, and can effectively prevent the contents from leaking out. Furthermore, pushing the refillable neck part 7 inward in the outflow direction V by rotating the refillable container 5 with the screwing requires less force and is more stable than pushing the refillable neck part 7 upward by fitting, making the refilling operation easier. In this embodiment, in order to ensure the above-mentioned screw engagement, the inner diameter of the cylindrical outer wall 13 and the outer diameter of the refillable neck portion 7 are approximately the same.

[0052] The mounting tube 15 preferably has an outer diameter such that the base end portion on the top panel 12 side can fit tightly against the inner circumferential surface of the outlet peripheral portion 4a (see FIG. 2). The mounting tube 15 of this embodiment has a portion on the tip side in the protruding direction of the mounting tube 15 where the outer diameter gradually decreases from the outside to the inside in the outflow direction V, and the outer diameter of the base end portion on the top panel 12 side is larger than that portion. The outer diameter of this base end portion is approximately the same as the inner diameter of the outlet peripheral portion 4a, and when the plug body 10 is attached to the refilling neck 4, the base end portion and the outlet peripheral portion 4a are in tight contact with each other. The mounting tube 15 may have an outer diameter that can be in close contact with the inner surface of the outlet peripheral portion 4a throughout the entire outflow direction V, or may have an outer diameter that can be in close contact with the inner surface of the outlet peripheral portion 4a only at the base end portion on the top panel 12 side.

[0053] The plug 1 of this embodiment is a molded product made of synthetic resin such as polypropylene or polyethylene, or bioplastic such as polylactic acid, and is preferably formed by injection molding. As described above, the plug 1 is formed as a two-part component consisting of the plug body 10 and the plug cap 20. Moreover, it is preferable that the plug lid 20 is made of a material having a lower specific gravity than the contents (liquid). With this configuration, after the plug lid 20 is detached from the plug body 10, the plug lid 20 floats in the contents due to buoyancy, so that the outflow of the contents through the outflow opening 11a can be effectively prevented from being hindered.

[0054] The plug 1 of the present invention is not limited to the embodiment shown in Figures 1 to 12. Another embodiment of the plug 1 according to the present invention will be described below. In the following, the other embodiment will be described mainly with respect to components different from the embodiment shown in Figures 1 to 12, and similar components will be given the same reference numerals and description will be omitted. For components that are not particularly described, the description of the embodiment shown in Figures 1 to 12 will be applied as appropriate.

[0055] In the embodiment shown in Figs. 1 to 12, the outflow side surface of the top panel 12 is flat, but the invention is not limited to this. 13(a), a notched step portion 12a is formed on the outflow side surface of the top panel 12. The notched step portion 12a is a recess formed on the outflow side surface of the top panel 12, and is disposed along and adjacent to the outer peripheral portion of the insertion opening, similar to the compressed seal material 19. In the present embodiment, the cutout step 12a includes an arc portion along the outer peripheral portion of the insertion opening 16 in a plan view, and the arc portion is continuous in an annular shape. The compressed seal material 19 in the present embodiment is disposed in a state housed in the recess that is the cutout step 12a (see FIG. 8). That is, in the cutout step 12a, the compressed seal material 19 is disposed along the outer peripheral portion of the insertion opening 16. This allows the compressed seal material 19 to be fixed to the top panel 12 more stably. The compression seal material 19 may be fixed to the top panel 12 by a protruding portion such as a rib formed on the top panel 12, instead of the cutout step portion 12a of this embodiment.

[0056] In the embodiment shown in FIGS. 1 to 12, the compressible sealing material 19 is a packing material separate from the plug body 10 , but the compressible sealing material 19 may be a part of the plug body 10 . The compressed seal material 19a shown in Fig. 13(b) is a linear rib that protrudes integrally from the outflow side surface of the top panel 12. Such a compressed seal material 19a may be disposed only on the outer peripheral portion of the insertion opening 16. In this case, the compressed seal material 19a becomes an arc-shaped linear rib. From the viewpoint of further improving the leakage prevention of the contents, it is preferable that the compressed seal material 19a is disposed continuously in an annular shape including an arc portion along the outer peripheral portion of the insertion opening 16. In this case, the compressed seal material 19a becomes an annular linear rib.

[0057] The present invention is not limited to the above-described embodiment and can be modified as appropriate. In addition, the above-described embodiments may be combined. For example, the contents transferred to the refillable container 6 using the stopper 1 or a refillable container 5 equipped with the stopper 1 may be liquid contents such as lotion or milky lotion, or other contents having fluidity such as powder or granular material.

[0058] The stopper 1 in the above-described embodiment is attached to the neck portion 4 of a bottle-shaped refill container 5, but it may also be attached to cover the refill outlet of various refill containers made of rigid plastic molded containers, etc. The plug body 10 does not necessarily have to include the through-wall 18 . The plug body 10 does not have to be provided with the outer mounting cylinder 14, and may be attached integrally to the refill container 5 by covering the refill outlet of the refill neck 4 by means of a seal joint or the like.

[0059] In addition, the outflow tube 11 and the mounting tube 15 may be cylindrical portions having a hollow cross-sectional shape other than circular or elliptical, and the outflow opening 11a of the plug body 10 and the closure plate portion 23 of the plug cover 20 do not have to have a circular planar shape.

[0060] The mounting wall portion 27 of the plug lid 20 does not necessarily have to have the wall recess 28 . Furthermore, the closure plate portion 23 of the plug 20 does not necessarily have to have the inner cylindrical protrusion portion 21 and the outer cylindrical protrusion portion 22, and does not necessarily have to have the rib 24.

[0061] In the above-described embodiment, the pushing protrusion 26 erected from the peripheral portion of the closing plate portion 23 was a columnar portion of a square prism (see FIG. 4), but the pushing protrusion 26 may be a columnar portion or a cylindrical portion of other shapes. The pushing protrusion 26 may have a tapered shape tapered toward the protruding direction. The tip of the pushing protrusion 26 may be flat or may have a step. Furthermore, the pushing protrusion 26 may be erected perpendicular to the closing plate portion 23, or may be erected in an inclined state with respect to the closing plate portion 23. The shape of the top panel 12 is not particularly limited, and may be circular as in the above-described embodiment, or may be any other shape such as rectangular.

[0062] The protruding lengths of the push-in protrusions 26 may be the same or different. For example, the protruding length of some of the push-in protrusions 26 may be shorter than the thickness of the insertion opening 16, and the protruding length of the remaining push-in protrusions 26 may be longer than the thickness of the insertion opening 16. In this case, even if the push-in protrusions 26 with short protruding lengths are completely pushed out of the insertion opening 16 during the refilling operation, the push-in protrusions 26 with long protruding lengths remain inserted in the insertion opening 16, so that air replacement is easily performed through the insertion opening 16 corresponding to the push-in protrusions 26 with short protruding lengths. [Explanation of symbols]

[0063] 1 stopper 2. Torso 3 Shoulder 4 Refill neck 4a Outlet edge area 5 Refill containers 6 Refillable containers 7 Refillable neck 10 Stopper body 11 Outflow pipe 11a Outflow opening 12 Top panel 13 Cylindrical outer wall 13a Female thread ridge 14 External mounting tube 15 Mounting tube 16 Insertion port 18 Insertion Partition Wall 19,19a Compression sealant 20 Bottle lid 21 Inner cylindrical protrusion 22 Outer cylindrical protrusion 23 Closure plate part 24 Ribs 26 Pressing protrusion 27 Mounting wall part 27a Wall bulge 61 Tip reduced diameter section 62 Intermediate diameter section 63 Large diameter base part V outflow direction Z vertical direction

Claims

1. A refillable container stopper that is attached to cover a refill outlet of a refillable container for refilling contents into a refillable container having a neck portion, The refill outlet comprises a plug body joined and fixed to the peripheral edge of the opening of the refill outlet, and a plug lid removably attached to the plug body to close the outlet opening formed in the top panel of the plug body from the inside in the outflow direction, The plug body comprises an outlet tube surrounding the outlet opening and projecting outward in the outflow direction from the top panel, a cylindrical outer wall arranged concentrically with the outlet tube, surrounding the outlet tube and projecting outward in the outflow direction from the top panel, and having an inner diameter corresponding to the outer diameter of the neck portion of the refillable container, and an attachment tube arranged concentrically with the outlet tube, surrounding the outlet opening and projecting inward in the outflow direction from the top panel, the plug body has at least two insertion holes formed in the top panel in a gap between the outflow tube and the cylindrical outer wall, The plug lid includes a mounting wall portion whose outer peripheral surface is in close contact with the inner peripheral surface of the mounting tube, a closure plate portion having a planar shape similar to the hollow cross-sectional shape of the mounting tube, and at least two push-in protrusions erected from the peripheral portion of the closure plate portion at portions corresponding to the insertion opening of the plug body, A compressible sealant is disposed along the outer peripheral edge of the insertion opening on the surface of the top panel from which the outlet tube and the cylindrical outer wall protrude, and the compressible sealant can be crushed and deformed by the tip of the neck of the refillable container that is pushed into the gap between the outlet tube and the cylindrical outer wall, The stopper lid is attached to the stopper body with the tip portion of the push-in protrusion protruding outward in the outflow direction from the top panel through the insertion hole in the gap between the outflow tube and the cylindrical outer wall.

2. The refillable container stopper as described in claim 1, wherein the compression sealing material is made of a packing material arranged along the outer peripheral portion of the insertion opening on the surface of the top panel from which the outflow tube and the cylindrical outer wall protrude.

3. The refillable container stopper body described in claim 1, wherein the compression sealing material is a linear rib that protrudes integrally from the surface of the top panel on the side from which the outlet tube and the cylindrical outer wall protrude, along the outer peripheral portion of the insertion opening.

4. A refillable container stopper as described in any one of claims 1 to 3, wherein the compression sealing material is arranged continuously in a circular ring shape including an arc portion along the outer peripheral portion of the insertion opening.

5. A refillable container stopper as described in any one of claims 1 to 3, wherein a notched step portion is formed in a continuous circular ring shape including an arc portion along the outer peripheral portion of the insertion port on the surface of the top panel from which the outflow tube and the cylindrical outer wall protrude, and in the notched step portion, the compression sealing material is arranged along the outer peripheral portion of the insertion port.

6. A refillable container stopper body as described in any one of claims 1 to 3, wherein the push-in convex portion of each of the stopper caps attached to the stopper body has a tip portion with a reduced diameter that creates a gap between the tip portion and the insertion hole.

7. 3. The refillable container plug according to claim 1, wherein the plug body has a pair of insertion holes formed at radially opposite positions on the top panel.

8. The refillable container closure according to any one of claims 1 to 3, wherein the closure has at least two different shapes of the push-in projections.

9. A refillable container stopper as described in any one of claims 1 to 3, wherein a female thread ridge is formed on the inner surface of the cylindrical outer wall, which threadably engages with a male thread ridge formed on the outer surface of the neck portion of the refillable container.

10. A refill container stopper as described in any one of claims 1 to 3, wherein the base end portion of the mounting tube on the top panel side has an outer diameter that can be tightly fitted into the inner surface of the opening peripheral portion of the refill outlet.

11. The refillable container closure according to any one of claims 1 to 3, wherein the insertion opening extends inward in the outflow direction from the outflow opening via an insertion partition wall.

12. A refill container for refilling contents into a refillable container having a neck portion, The refill container includes a refill container stopper attached to cover the refill outlet, The refill container stopper comprises a stopper body joined and fixed to the peripheral portion of the opening of the refill outlet, and a stopper lid removably attached to the stopper body to close the outlet opening formed in the top panel of the stopper body from the inside in the outflow direction, The plug body comprises an outlet tube surrounding the outlet opening and projecting outward in the outflow direction from the top panel, a cylindrical outer wall arranged concentrically with the outlet tube, surrounding the outlet tube and projecting outward in the outflow direction from the top panel, and having an inner diameter corresponding to the outer diameter of the neck portion of the refillable container, and an attachment tube arranged concentrically with the outlet tube, surrounding the outlet opening and projecting inward in the outflow direction from the top panel, the plug body has at least two insertion holes formed in the top panel in a gap between the outflow tube and the cylindrical outer wall, The plug lid includes a mounting wall portion whose outer peripheral surface is in close contact with the inner peripheral surface of the mounting tube, a closure plate portion having a planar shape similar to the hollow cross-sectional shape of the mounting tube, and at least two push-in protrusions erected from the peripheral portion of the closure plate portion at portions corresponding to the insertion opening of the plug body, A compressible sealant is disposed along the outer peripheral edge of the insertion opening on the surface of the top panel from which the outlet tube and the cylindrical outer wall protrude, and the compressible sealant can be crushed and deformed by the tip of the neck of the refillable container that is pushed into the gap between the outlet tube and the cylindrical outer wall, The plug lid is attached to the plug body with the tip portion of the push-in protrusion protruding outward in the outflow direction from the top panel through the insertion hole in the gap between the outflow tube and the cylindrical outer wall.

Images