Double container

Abstract

The present invention is a container 1 having a bottle body 10 that is formed in a bottomed cylinder shape and that has a shoulder part 13 in which a central hole is formed in the center of an upper surface, an opening 14 that is established above the edge section of the central hole in the shoulder part 13 of the bottle body 10, and a flange 17 that extends outward from the outer peripheral surface of the opening 14 and that is set apart from the shoulder part 13, wherein: the bottle body 10, the opening 14, and the flange 17 are integrally formed from a resin; and at least part of the flange 17 is larger than the shoulder section 13 in a top view.

Description

[Technical field]

[0001] The present invention relates to a container, a method for making the container, and a double container including the container. [Background technology]

[0002] A double container is known in which an inner container filled with a content is replaceably loaded into an expensive outer container, and when the content is used up, the outer container is replaced with a new inner container (refill container) filled with the content, allowing the outer container to be used repeatedly.

[0003] As an example of such a refill container, Patent Document 1 proposes an inner container with a flange to facilitate engagement with an outer container.

[0004] Here, in the inner container of Cited Document 1, as shown in FIG. 1, a flange (brim portion) F is attached to the bottle, and in order to realize this configuration, the flange F is also blow molded together with the bottle, as shown in FIGS. 2 and 3. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 11-301732 Summary of the Invention [Problem to be solved by the invention]

[0006] However, as shown in Figures 2 and 3, if the flange F provided on the inner container in Figure 1 is blow molded, the molding precision of the flange F is low, and there is a risk of misalignment at the flange F when the inner container is fitted with the outer container as shown in Figure 1.

[0007] In view of the above circumstances, an object of the present invention is to provide a container that can improve the molding accuracy of a flange that can be used for engagement with an outer container. [Means for solving the problem]

[0008] In order to solve the above problems, a container according to one aspect of the present invention comprises: A bottle body having a bottomed cylindrical shape and a shoulder portion with a central hole formed in the center of the upper surface; a mouth portion extending upward from an edge portion of a central hole of the shoulder portion of the bottle body; a flange extending outwardly from an outer periphery of the mouth and spaced from the shoulder; The bottle body, the mouth portion, and the flange are integrally formed of resin, At least a portion of the flange is larger than the shoulder when viewed from above. Effect of the Invention

[0009] According to one aspect, the container can improve the precision of molding a flange that can be used to engage with an outer container. [Brief description of the drawings]

[0010] [Figure 1] FIG. 13 is an explanatory diagram of a double container including an inner container according to a conventional example. [Diagram 2] 13 is a manufacturing flowchart of an inner container according to a conventional example. [Diagram 3] FIG. 13 is an explanatory diagram of a manufacturing process for an inner container according to a conventional example. [Figure 4] FIG. 1 is an external view of an example of a container according to the present invention. [Diagram 5] FIG. 2 is a cross-sectional perspective view of a container according to the present invention. [Figure 6] 3 is a manufacturing flow chart of a container according to the present invention. [Figure 7] 4A to 4C are explanatory diagrams of a manufacturing process for a container according to the present invention. [Figure 8] FIG. 1 is an explanatory view of a double container according to a first embodiment of the present invention. [Figure 9] FIG. 2 is an exploded view of the double container according to the first embodiment. [Figure 10] FIG. 2 is an explanatory diagram of engagement between the inner container and the outer container of the double container according to the first embodiment. [Figure 11]FIG. 4 is an explanatory diagram of engagement between the annular pressing member and the outer container of the double container according to the first embodiment. [Figure 12] FIG. 4 is an explanatory diagram of the engagement between the mouth of the inner container of the double container according to the first embodiment, the inner plug, and the cap. [Figure 13] FIG. 2 is an exploded view of the double container cap of the first embodiment of the present invention when used as a dispenser. [Figure 14] FIG. 5 is an exploded view of a double container according to a second embodiment of the present invention. [Figure 15] FIG. 11 is an explanatory diagram of engagement between the inner container and the outer container of the double container according to the second embodiment. [Figure 16] FIG. 11 is an exploded view of a double container according to a modified example of the second embodiment of the present invention. [Figure 17] FIG. 5 is an explanatory diagram of a double container according to a third embodiment of the present invention. [Figure 18] FIG. 11 is an exploded perspective view of a double container according to a third embodiment. [Figure 19] FIG. 13 is an explanatory diagram of engagement between the inner container and the cylindrical fastening portion of the double container according to the third embodiment. [Figure 20] 13 is an explanatory diagram of the engagement between the annular pressing member, the cylindrical fastening portion, and the outer container of the double container according to the third embodiment. FIG. [Figure 21] FIG. 11 is an explanatory view of a double container according to a fourth embodiment of the present invention. [Figure 22] FIG. 13 is an exploded perspective view of a double container according to a fourth embodiment. [Diagram 23] FIG. 13 is an explanatory view of a cylindrical fastening portion of a double container according to a fourth embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the following drawings, the same components are denoted by the same reference numerals, and duplicated explanations may be omitted.

[0012] The present invention relates to a container, a method for manufacturing the container, and a double container including the container. The container is a self-supporting container made of resin. The outer container of the double container is made of glass, wood, resin, silicon, metal, or the like.

[0013] The contents placed in the inner container held by the outer container of the double container of the present invention are not single-use items such as cosmetics, perfumes, detergents, seasonings, etc., but liquid or powder substances that are to be used in portions.

[0014] <Inner container> Fig. 4 is an external view of an example of a container 1 according to the present invention. Fig. 5 is a cross-sectional perspective view of the container 1 according to the present invention. The container 1 according to the present invention may be used alone, or may be used as an inner container (refill container) of a double container described later.

[0015] As shown in FIGS. 4 and 5, the container 1 according to the present invention has a bottle body 10, a mouth portion 14, and a flange 17.

[0016] The bottle body (also called the bottle portion or the container portion) 10 is a cylindrical body having a bottom 11 and a body portion 12, and has a shoulder portion 13 with a central hole O1 formed in the center of the upper surface.

[0017] The mouth portion 14 is an upright tubular portion 15 standing upward from the edge of the central hole O1 of the shoulder portion 13 of the bottle body 10, and a screw projection 16 is formed on the outer periphery of the upright tubular portion 15 of the mouth portion 14.

[0018] The flange (brim portion) 17 is an annular member that spreads outward from the outer circumferential surface of the mouth portion 14. In this configuration, the flange 17 has a rib 19 provided on the lower surface of a flat ring plate 18.

[0019] In the container 1 of the present invention, the flange 17 is located below the screw projection 16 in the mouth 14 and is spaced upward from the shoulder 13 of the bottle body 10. At least a portion of the flange 17 is larger than the shoulder 13 in a top view. Figures 4 and 5 show a case where the flange 17 as a whole is larger than the shoulder 13 in a top view.

[0020] In the container 1 of the present invention, the bottle body 10, the mouth portion 14, and the flange 17 are integrally formed from resin. A method for molding this container 1 from resin will be described below.

[0021] <Container manufacturing method> A method for manufacturing (molding) the container of Fig. 4 will be described with reference to Fig. 6 and Fig. 7. Fig. 5 is a manufacturing flow chart for the container 1 according to the present invention. Fig. 6 is an explanatory diagram of the manufacturing process of the container 1 according to the present invention.

[0022] In step S1, a bottomed parison (preform) is molded having the screw projections 16 of the mouth portion 14, a flange 17, and a bottomed bottle portion in a contracted state (see FIG. 7(a)). The bottomed parison is molded by injection molding. In detail, a bottomed cylindrical bottle body before expansion, a cylindrical mouth portion 14 with a screw projection 16 formed thereon, which has approximately the same outer diameter as the outer shape of the bottle body before expansion and is connected to the upper end of the bottle body, and a flange 17 extending outward from the outer circumferential surface of the mouth portion 14 are integrally injection molded with resin.

[0023] In the case of the cold parison method, the bottomed parison is cooled over time after S1 (step S2), and the preformed bottomed parison is reheated just before being moved to the blow mold (step S3). In the case of the hot parison method, blowing is performed immediately after injection, so the process of moving to the blow mold in S4 follows S1 immediately, without going through the cooling and reheating steps of S2 and S3 shown by the dotted lines in Figure 6.

[0024] In step S4, the preformed bottomed parison is transferred to a blow mold (FIG. 7(b)).

[0025] In step S5, the mold is closed to sandwich the bottomed parison (FIG. 7(c)). The mold used here is in close contact with the mouth portion 14 on which the screw projections 16 are formed and the flange 17 when sandwiched, but the portion that houses the bottle is not in close contact at this point and is shaped to match the shape of the finished bottle body 10.

[0026] In this case, the mold is configured so that the extension of the bottle body 10 is smaller than the outer shape of the flange 17 when viewed from above. For example, as shown in FIG. 5, when the flange 17 is annular and the bottle body 10 is cylindrical with a bottom, the mold is set so that the outer diameter of the shoulder portion 13 is smaller than the outer diameter of the flange 17. Note that the shape of the flange 17 is not limited to annular, and even in the case of other shapes such as polygonal or protruding, it is sufficient that the mold shape is set so that at least a part of the flange 17 is larger than the extension of the bottle body 10, that is, so that a part of the flange 17 is longer in the horizontal direction than the shoulder portion 13 when shown in a vertical cross-sectional view as shown in FIG. 7(d).

[0027] In step S6, a blowing process is performed in which air is injected into the bottomed cylindrical bottle body in a shrunk state located at the bottom of the bottomed parison, and the bottle body in the shrunk state is blow molded into an expanded bottle shape (FIG. 7(d)). More specifically, compressed air is blown into the inside of the bottle body before expansion through the central hole O1 of the mouth portion 14, causing it to expand so as to form a shoulder portion 13 away from the flange 17, thereby forming the bottle body 10 as shown in FIG.

[0028] The shoulder portion 13 of the bottle body 10 after blow molding formed by the above-mentioned mold is smaller than the outer shape of the flange 17 when viewed from above.

[0029] The container 1 formed as described above may be used alone, but may also be used as an inner container (refill container) within a double container as described below.

[0030] <First embodiment (double container)> A double container according to a first embodiment including the container of the present invention will be described with reference to Figs. 8 to 12.

[0031] First, the schematic configuration of the double container will be described with reference to Fig. 8 and Fig. 9. Fig. 8 is an explanatory diagram of the double container according to the first embodiment of the present invention. In detail, Fig. 8 is a half cross-sectional view of the double container, with the left side showing an external view and the right side showing a cross-sectional view. Fig. 9 is an exploded view of the double container according to the first embodiment of Fig. 8.

[0032] 8 and 9, the double container 100 according to this embodiment has, as its main parts, an inner container 1, an outer container 2, and an annular pressing member 3. In addition, the double container 100 has, as its auxiliary parts, an inner plug 5 and a cap 6.

[0033] The inner container 1, which is the refill container inside the double container 100, has a configuration similar to that shown in Figures 4 and 5. Therefore, the inner container 1 has the same bottle body 10, mouth portion 14, and flange 17 as those described above, and the bottle body 10, mouth portion 14, and flange 17 are integrally formed from resin.

[0034] As described above, the inner container 1 is made of resin. The resin constituting the inner container 1 is, for example, a polyester resin such as polypropylene (PP), polyethylene (PE), acrylonitrile butadiene styrene (ABS), polybutylene terephthalate (PBS), polyacetal (POM), or polyethylene terephthalate (PET), or a biodegradable resin.

[0035] The outer container 2 is a bottomed, cylindrical, self-supporting container that houses the inner container (refill container) 1 and is the outer container of the double container. The outer container 2 includes a bottom 21 (see FIG. 11(b)), an outer wall 22, a flange receiving portion 23, and an outer engagement portion 26.

[0036] The outer container 2 of the present invention is made of glass, wood, resin, silicon, metal, etc. In the case of resin, it is made of, for example, PP, PE, ABS, PBS, POM, PET, or polyester resin, biodegradable resin, etc., like the above-mentioned inner container 1. In the case of wood, it includes, for example, coniferous wood such as cedar, cypress, and pine, and hardwood wood such as oak, walnut, black cherry, alder, and rubberwood, as well as bamboo.

[0037] The annular pressing member 3 is an upper cover that covers the upper part of the flange 17 and the shoulder portion 13, and is a member that presses the upper surface of the flange 17 of the inner container 1 from above and has a through hole O3 through which the upper part of the mouth portion 14 of the inner container 1 is inserted. The annular pressing member 3 is made of resin such as PP, PE, ABS, PBS, POM, PET, or polyester resin, biodegradable resin, etc.

[0038] The inner plug 5 is a discharge amount adjusting part that sets an outlet for an appropriate amount of discharge for the mouth part 14. The inner plug 5 is formed of elastic rubber or resin (for example, PP, PE).

[0039] The cap 6 is a mouth cover that covers a portion of the mouth 14 of the inner container 1 that is exposed above the annular pressing member 3. The cap 6 is made of resin such as PP, PE, ABS, PBS, POM, PET, or polyester resin, or biodegradable resin.

[0040] Also in the inner container 1 of this configuration, at least a portion of the flange 17 is larger than the shoulder portion 13 when viewed from above. With this configuration, the flange 17 is fixed to the outer container 2 when the inner container 1, which is a refill container, is housed in the outer container 2.

[0041] In this example, as an example of at least a portion of the flange 17 being larger than the shoulder portion 13 in a top view, an example is shown in which the entire flange is larger than the shoulder portion, such as a circular ring or a polygonal ring, but the flange may be a linear or thorn-shaped protrusion that protrudes outward, and in that case, only the protrusion portion may be larger in a top view, with the other portions being smaller than the shoulder portion in a top view. In other words, "the flange is larger than the shoulder portion at least in a top view" includes cases where the entire shoulder portion is larger and cases where only a portion of the shoulder portion is larger and the other portions are the same size or smaller.

[0042] In this embodiment, as shown in Figure 8, the annular pressing member 3 and the outer container 2 are engaged with each other in a state in which the flange 17, of any shape, of the inner container 1 is sandwiched from above and below between the upper surface 31 of the annular pressing member 3 and the upper end of the outer wall 22 of the outer container 2.

[0043] Furthermore, all or a part of the flange 17 of the inner container 1 that projects outward beyond the shoulder 13 of the bottle in top view serves as a fixing portion when the inner container 1 is housed in the outer container 2, and also serves as a stopper for preventing the inner container 1 from rotating relative to the outer container 2. Details of the structure and engagement of these members will be described later with reference to Figures 10 to 12.

[0044] Here, as shown in the exploded view of FIG. 9, the content-storing container X, which is composed of the inner container 1 and the stopper 5, is a refill that can be replaced (removed and replaced) together with the contents for the housing part Y, which is the outer container 2, the annular pressing member 3, and the cap 6.

[0045] In this configuration example, the content-accommodating container X serving as a refill comprises an inner container 1 and an inner plug 5. In that case, a temporary cap other than the cap 6 may be engaged with the opening 14 at the distribution stage. Alternatively, the cap 6 may also be a refill that is replaceable with respect to the outer container 2 and the annular pressing member 3 together with the inner container 1 and the inner plug 5.

[0046] On the other hand, the housing part Y has at least the outer container 2 and the annular pressing member 3. The housing part Y is reused even after replacing the refill. The cap 6 may also be part of the housing part Y. In this manner, in the double container 100 which can be disassembled, at least the inner container 1 and the inner plug 5 on the main body side can be made into a refill which can be replaced together with the contents, while the housing part Y includes at least the outer container 2 and the annular pressing member 3. In other words, the empty content-accommodating container X can be replaced by a new refill of the same shape, and the housing part Y can be used repeatedly.

[0047] Next, the configuration and engagement of each member of the double container 100 according to the first embodiment will be described with reference to Fig. 10 to Fig. 12. Fig. 10 is an explanatory diagram of the engagement between the inner container 1 and the outer container 2 of the double container 100 according to the first embodiment. In Fig. 10, (a) is a bottom perspective view of the inner container 1, and (b) is a top perspective view of the outer container 2.

[0048] In this embodiment, as shown in Figure 8, the annular pressing member 3 and the outer container 2 are engaged with each other in a state in which the flange 17 of the inner container 1 is sandwiched from above and below between the upper surface 31 of the annular pressing member 3 and the upper end of the outer wall 22 of the outer container 2.

[0049] For this reason, the flange 17 of the inner container 1 has a refill-side fixing portion 19, and for the above-mentioned engagement, a flange receiving portion 23 is provided at the upper end of the outer wall 22 of the outer container 2. Then, the refill-side fixing portion 19 of the flange 17 engages with the flange receiving portion 23 of the outer container 2, whereby the outer container 2 fixes and holds the inner container 1, which serves as a refill.

[0050] More specifically, in this embodiment, as shown in FIG. 10(a), the flange 17 of the inner container 1 is provided with a plurality of ribs 19 protruding downward around the outer edge of the lower surface of the ring plate 18 as a refill-side fixing portion.

[0051] As shown in FIG. 10(b), an inner ring 24 having a plurality of grooves 25 formed therein is provided as a flange receiving portion 23 at the upper end of the outer wall 22 of the outer container 2.

[0052] In this embodiment, a plurality of ribs 19 of the flange 17 fit into a plurality of grooves 25 of the outer container 2, thereby restricting the rotation and position of the inner container 1 relative to the outer container 2.

[0053] 10(a) shows an example in which four ribs 19 (one not shown) are provided on the underside of the ring plate 18 as the multiple ribs 19 provided on the flange 17, but the number of ribs 19 as fixing parts for regulating rotation and position is not limited as long as there is one or more. Also, in order to regulate the rotation of the flange 17 relative to the flange receiving part 23, the multiple ribs 19 extend in the radial direction of the ring plate 18, which is different from the circumferential direction.

[0054] 10(b) shows an example in which twelve grooves 25 are provided as the plurality of grooves 25 in the flange receiving portion 23, but the number of grooves 25 may be one or more and may be any other number as long as it is the same number as or a multiple of the number of the plurality of ribs 19. If the number of grooves 25 in the flange receiving portion 23 is a multiple of the number of ribs 19 in the flange 17, the user can mate the grooves 25 with the ribs 19 with a smaller rotation angle during assembly.

[0055] FIG. 11 is an explanatory diagram of the engagement between the annular pressing member 3 and the outer container 2 of the double container 100 according to the first embodiment.

[0056] In this embodiment, as shown in Figure 8 above, the annular pressing member 3 and the outer container 2 are engaged with each other in a state in which the flange 17 of the inner container 1 is sandwiched from above and below between the upper surface 31 of the annular pressing member 3 and the upper end of the outer wall 22 of the outer container 2.

[0057] 11(b), the outer container 2 is provided with an outer engagement portion 26 around the upper end of the outer wall 22 as an engagement portion with the annular pressing member 3, and a helical screw protrusion 28 is provided on its outer surface. Furthermore, as shown in FIG. 8, in the assembled state of the double container 100, the upper end of the outer wall 22 of the outer container 2 is an upper end thin-walled portion 27 so that the peripheral wall 32 of the annular pressing member 3 of the outer container 2 is on approximately the same plane.

[0058] On the other hand, as shown in FIG. 11(a), the annular pressing member 3 is provided with a helical screw projection 33 on the inner peripheral surface of the peripheral wall 32 as an engagement portion with the outer container 2.

[0059] Then, with the flange 17 of the inner container 1 sandwiched between the underside of the upper surface 31 of the annular pressing member 3 and the flange receiving portion 23 near the upper end of the outer wall 22 of the outer container 2 from above and below, the helical screw protrusion 28 on the outer surface of the upper end of the outer wall 22 of the outer container 2 is engaged with the helical screw protrusion 33 on the peripheral wall 32 of the annular pressing member 3, thereby engaging the outer container 2 and the annular pressing member 3 while fixing the inner container 1.

[0060] Thus, once assembled by screwing together when the refill is attached, the annular pressing member 3 and the outer container 2 maintain the engaged state during normal use and are not disassembled.

[0061] In addition, in Figure 11, the outer container 2 and the annular pressing member 3 are shown to be engaged by a screw-type engagement, but the outer container 2 and the annular pressing member 3 may also be engaged by, for example, a fitting method in which the outer container 2 and the annular pressing member 3 are fitted over a protrusion, or by other methods.

[0062] Regardless of which method is used, when attaching or removing the cap 6 to the mouth 14 of the inner container 1, it is preferable that when a user grasps the outer wall 22 of the outer container 2 and the cap 6 and rotates the outer wall 22 and the cap 6 relative to each other, the annular pressing member 3 and the outer container 2 are engaged with each other in a manner that restricts rotation to the extent that the annular pressing member 3 does not rotate together with the outer wall 22.

[0063] However, if the cap 6 is attached to the mouth 14 of the inner container 1 by a method other than rotation, such as screwing, for example, by simply placing it over the mouth or by pushing it up, the outer container 2 and the annular holding member 3 do not need to be engaged in a manner that restricts rotation, and an engagement method that restricts only the vertical direction and not rotation (see Figure 16) may be used.

[0064] In the present invention, the flange 17 of the inner container 1 projects outward beyond the shoulder 13 and is spaced from the shoulder 13, so that when assembling the double container 100, the annular pressing member 3 and the outer container 2 can engage with each other while the flange 17 of the inner container 1 is joined from above and below and sandwiched, so that the upper end side of the outer container 2 does not need to have a particularly complicated shape. Therefore, a glass container, which is difficult to process, can be used as the outer container 2 of the double container 100.

[0065] Fig. 12 is an explanatory diagram of the engagement between the mouth 14 of the inner container 1, the inner plug 5, and the cap 6 of the double container 100 according to the first embodiment. In Fig. 12, (a) is a top perspective view of the inner container 1, the inner plug 5, and the cap 6 with the annular pressing member 3 fitted therein, and (b) is a bottom perspective view of the inner plug 5 and the cap 6.

[0066] The inner plug 5 is a member that is fitted into the upper end of the mouth 14 of the inner container 1 to adjust the discharge amount. The inner plug 5 has a double-cylindrical shape with an upper surface, and has an upper wall 51 on the upper surface, an outer peripheral wall 53 which is the outer side surface, and an inner peripheral wall 54 which is the inner side surface.

[0067] A hole O5 penetrating in the vertical direction is formed in the center of the upper wall 51 of the inside plug 5. The periphery of the hole O5 is recessed in a mortar shape (funnel shape) toward the hole O5, and abutment protrusion 52 is formed on the upper wall 51, which protrudes upward in an annular shape.

[0068] The upper end of the upright tubular portion 15 of the mouth 14 of the inner container 1 is an upper thin-walled portion 151 with a thin outer surface. When the inner plug 5 is attached to the mouth 14, the upper thin-walled portion 151 of the mouth 14 is pressed and sandwiched between the elastic outer peripheral wall 53 and inner peripheral wall 54 of the inner plug 5, so that the inner plug 5 fits tightly to cover the central hole O1, which is a through hole of the mouth 14. When the inner plug 5 is fitted into the mouth 14, the hole O5 of the inner plug 5 becomes the discharge outlet of the double container 100.

[0069] 12(a) and 12(b) are exploded views for explaining the positional relationship, which does not actually exist in the assembled state. Before the double container 100 is sold or before the refill container is sold, the inner plug 5 is fitted into the upper end of the mouth 14 of the inner container 1 to form the content-storing container X.

[0070] Thereafter, in assembling the content-accommodating container X and the housing portion Y, the inner container with the mouth portion fitted therein is attached to the outer container, and then the annular pressing member 3 is attached to the outer container 2 as shown in FIG.

[0071] 12(a) does not show the outer container 2 in order to explain the positional relationship, but when the inner container 1, outer container 2, and annular pressing member 3 are assembled, the upper surface of the flange 17 abuts against the lower surface of the upper surface 31 of the annular pressing member 3, and the mouth 14 of the inner container 1 protrudes from the inside of the through-hole O3 in the upper surface 31. The cap 6 is attached so as to cover the portion of the mouth 14 that protrudes above the through-hole O3 in the upper surface 31 of the annular pressing member 3.

[0072] The cap 6 is a mouth cover that can be attached and detached to the mouth 14 and the inner plug 5 of the inner container 1 so as to be able to hermetically fit thereto, and covers the portion of the mouth 14 that extends upward beyond the through hole O3 of the annular pressing member 3 from above and on the outer circumferential side.

[0073] The cap 6 is composed of a ceiling wall 61 and an outer wall 63. A protruding boss (also called a plug portion, sealing protrusion, or seal portion) 62 is provided so as to protrude downward at the center of the lower surface of the ceiling wall 61. A helical screw protrusion 64 is provided on the inner peripheral surface of the outer wall 63.

[0074] When the cap 6 is attached to the mouth portion 14, the boss 62 of the cap 6, when inserted into the hole O5 of the inner plug 5, forms a plugging structure, and the cap 6 fits tightly around the mouth portion 14.

[0075] 12 shows an example in which the inner plug 5 is engaged with the upper end of the mouth 14, but the inner plug 5 does not have to be provided. For example, when a large amount is used per use or when discharging highly viscous contents, the contents may be directly discharged from the central hole O1 at the upper end of the upright tubular portion 15 of the mouth 14. Alternatively, a ring-shaped upper surface with an appropriately sized hole may be provided during the molding stage of the inner container 1, so that the contents can be discharged directly from the mouth 14 in an adjusted amount without providing the inner plug 5.

[0076] 12 shows a structure in which the mouth 14 of the inner container 1 and the cap 6 are screwed together, but the mouth 14 of the inner container 1 and the cap 6 do not have to be screwed together. For example, they may be fitted together by overriding a protrusion, or may be engaged using a magnetic force.

[0077] Alternatively, the cap that is screw-engaged may be a hinge cap. In the case of a hinge cap, the top surface or a part of the top surface can be opened and closed relative to the cylindrical cap portion by a hinge, and the discharge port can be opened and closed with the cylindrical cap portion engaged with the opening 14.

[0078] 10, the mechanism for restricting rotation and position is provided to prevent co-rotation when the cap 6 is rotated relative to the mouth portion 14 to open and close it. Therefore, if the engagement of the cap 6 with the mouth portion 14 is not a screw engagement, or if the cap is configured not to rotate each time it is used, such as a hinge cap, the flange 17 only needs to be restricted in position relative to the flange receiving portion 23, and therefore does not need to have a rotation stop function such as a rib or groove.

[0079] (Dispenser example) In the above Figures 8 to 12, an example has been described in which an inner stopper 5 is provided as the discharge adjustment part of the double container 100, and a cap 6 that engages with the mouth 14 is provided as the mouth cover, but instead of the inner stopper 5 and the cap 6, a dispenser 7 may be provided.

[0080] 13 is an exploded view of the cap of the first embodiment in the form of a dispenser. In this configuration, the cap 6 and the inside plug 5 are replaced with a dispenser 7, and the configuration is the same as that described above.

[0081] The dispenser 7 has a two-stage cylindrical shape, and includes a cylindrical portion 73 that covers the mouth portion 14, a suction tube 72, and a push portion 75. The push portion 75 is formed so as to be able to be pushed into the ceiling ring 71 at the upper end of the large-diameter cylindrical portion 73. The push portion 75 is formed with a discharge hole 76 for discharging the contents. Although not shown, the inner peripheral surface of the cylindrical portion 73 is provided with a screw projection that can be engaged with the screw projection 16 of the mouth portion 14, as in the inner peripheral surface of the cap 6 in FIG. 12(b).

[0082] Furthermore, although not shown, a constant-volume dispensing mechanism that sucks up and dispenses a fixed amount is provided inside the cylindrical portion 73 of the dispenser 7 and inside the push portion 75. When the push portion 75 is pressed against the ceiling ring 71, a fixed amount of the content in the inner container 1 is sucked up by the suction tube 72 and discharged from the discharge hole 76.

[0083] In this configuration, although not shown, an outer cap may be further provided to cover the push portion 75 at the top of the dispenser 7.

[0084] In this configuration, the inner container 1 is provided as a content-accommodating container Xα that serves as a refill. In this case, a temporary cap separate from the dispenser 7 may be engaged with the mouth portion 14 at the distribution stage. Alternatively, the dispenser 7 may also be a refill that is replaceable with respect to the outer container 2 and the annular pressing member 3 together with the inner container 1.

[0085] On the other hand, the casing Yα has at least an outer container 2 and an annular pressing member 3. The casing Yα is reused even after replacing the refill. The dispenser 7 may also be a reusable member of the casing Yα.

[0086] 12 is screwed into the mouth 14 of the inner container 1 during assembly, but after assembly, the dispenser 7 does not rotate relative to the mouth 14 each time it is used. Therefore, in a configuration in which the dispenser 7 is attached, the flange 17 only needs to be regulated in position relative to the flange receiving portion 23, and therefore does not need to have a rotation prevention function such as the rib or groove shown in FIG.

[0087] <Second embodiment> Next, a double container 200 according to a second embodiment including the container of the present invention will be described with reference to Figs.

[0088] 14 is an exploded perspective view of a double container 200 according to a second embodiment of the present invention. The double container 200 of this embodiment differs from the first embodiment in the shape of the flange 17A of the inner container 1A and the shape of the flange receiving portion 23A of the outer container 2A. Since the other configurations are the same as those of the first embodiment, only the differences will be described below.

[0089] Fig. 15 is an explanatory diagram of the engagement between the inner container 1A and the outer container 2A of the double container 200 according to the second embodiment of Fig. 14. In Fig. 15, (a) is a top perspective view of the inner container 1A, and (b) is a top perspective view of the outer container 2A.

[0090] In this embodiment as well, the annular pressing member 3 and the outer container 2A are engaged with each other in a state in which the flange 17A, which is the refill side fixing portion of the inner container 1A, is sandwiched from above and below between the upper surface 31 of the annular pressing member 3 and the flange receiving portion 23A at the upper end of the outer wall 22 of the outer container 2A.

[0091] In this embodiment, as shown in Fig. 15(a), the flange 17A of the inner container 1A has a polygonal outer shape in top view, and serves as the refill-side fixing part. Therefore, the flange 17A is formed of a perforated polygonal plate 18A, and is not provided with a rib.

[0092] On the other hand, as shown in FIG. 15(b), an inner abutment ring 24A having a polygonal cylindrical portion 25A formed on the upper side is provided as a flange receiving portion 23A at the upper end of the outer wall 22 of the outer container 2A.

[0093] In this embodiment, the outer shape of the polygonal perforated polygonal plate 18A of the flange 17A fits into the polygonal tubular portion 25A at the upper end of the outer wall 22 of the outer container 2A, thereby restricting the rotation and position of the inner container 1A relative to the outer container 2A. In addition, when the outer shape of the polygonal perforated polygonal plate 18A of the flange 17A is fitted into the polygonal tubular portion 25A, the outer edge of the lower surface of the perforated polygonal plate 18A is held by the inner abutment ring 24A.

[0094] In the double container 200 of this embodiment, the flange receiving portion 23A of the outer container 2A, which is the portion that engages with the inner container 1, is configured with a shape that is relatively simpler than that of the groove portion 25. Therefore, even when the outer container 2A is molded from glass, it is not necessary to provide a fine groove portion on the outer container 2A side, and since the processed portion of the flange receiving portion 23A has a large shape, the strength of the entire outer container 2A can be increased.

[0095] 15 shows an octagon as an example of the polygonal outer shape of flange 17A, but the outer shape of flange 17A may be other polygonal shapes such as a triangle or a rectangle. Also, while the flange 17A of this configuration is shown as an example of a polygon with sharp corners, the flange 17A may be a polygon with rounded corners as long as rotation can be restricted in this engagement configuration. Furthermore, by devising the shape of the flange receiving portion 23A side, the shape of flange 17A may be a polypointed star such as a five-pointed star or a hexapointed star.

[0096] <Modification of the second embodiment> Fig. 16 is an exploded view of a double container 200β according to a modified example of the second embodiment of the present invention. In the double container 200β shown in Fig. 16, the engagement between the inner container 1β and the outer container 2β is polygonal like that of the second embodiment, but it differs in that the bottle body 10β below the mouth 14 of the inner container 1β, the outer shape of the outer container 2β, and the side shape of the annular pressing member 3β, i.e., the body parts of all the components, are rectangular.

[0097] Furthermore, because the side shapes of these components are rectangular, even if the engagement between the outer container 2β and the annular pressing member 3β is not a rotation-restricting engagement such as a screw engagement, rotation is restricted by the fit between the square tubes. Therefore, even if the cap 6 rotates when attaching or detaching it to or from the mouth 14 of the inner container 1β, the cap 6 can be attached or detached while gripping the outer container 2β without any special engagement in the circumferential direction, with only the simple anti-slip protrusions 28β, which are the vertical engagement parts, preventing the outer container 2β and the annular pressing member 3β from rotating together with respect to the inner container 1β.

[0098] In addition, Figure 16 shows an example in which the top surface shape of the body of the member, which is the bottle body 10β below the mouth 14 of the inner container 1β, the outer shape of the outer container 2β, and the side shape of the annular pressing member 3β, is rectangular. However, as another configuration example of this modified example that does not have an engagement for preventing rotation, the top surface shape of the body of the member may be a polygon other than a circle, such as a triangle or pentagon, a polypointed star shape such as a pentagram or hexagram, or an ellipse or oval shape.

[0099] <Third embodiment> Next, a double container 300 according to a third embodiment including the container of the present invention will be described with reference to FIGS.

[0100] First, the schematic configuration of the double container 300 will be described with reference to Figures 17 and 18. Figure 17 is an explanatory diagram of the double container 300 according to the third embodiment of the present invention. In detail, Figure 17 is a half cross-sectional view of the double container 300, with the left side showing an external view and the right side showing a cross-sectional view. Figure 18 is an exploded see-through view of the double container 300 according to the third embodiment.

[0101] The double container 300 according to this embodiment has, as its main parts, an inner container 1, an outer container 2B, and an annular pressing member 3, as well as a cylindrical fastening part 4. The double container 300 also has, as its auxiliary parts, an inner plug 5 and a cap 6.

[0102] As shown in Fig. 18, the cylindrical fastening part 4 included in this embodiment is a cylindrical fastening member, and is a ring cover disposed between the lower surface of the flange 17 of the inner container 1 and the upper end of the outer wall of the outer container 2. Then, as shown in Fig. 17, the annular pressing member 3 and the upper end of the cylindrical fastening part 4 are engaged with each other in a state in which the flange 17 of the inner container 1 is sandwiched between them from above and below.

[0103] The cylindrical fastening portion 4 is made of a resin such as PP, PE, ABS, PBS, POM, PET, or polyester-based resin, or a biodegradable resin, or elastic rubber, or the like.

[0104] In this embodiment, the housing part YB has at least the outer container 2B, the annular pressing member 3, and the cylindrical fastening part 4. The housing part YB is reused even after the refill is replaced. The cap 6 may be the housing part YB or may be a refill. In the disassembled double container 300 according to this embodiment, the housing part Y includes at least the outer container 2, the annular pressing member 3, and the cylindrical fastening part 4, and at least the inner container 1 and the inner plug 5 on the main body side can be a refill that can be replaced together with the contents. That is, the empty content-storing container X can be replaced by a new refill of the same shape, and the housing part YB including the cylindrical fastening part 4 can be used repeatedly.

[0105] In addition, in this embodiment, as shown in Figures 17 and 18, the outer diameter of the outer peripheral tube 40 is equal at the top and bottom of the tubular fastening portion 4, and in the assembled state, the peripheral wall 32 of the annular pressing member 3 covers the entire outer periphery of the tubular fastening portion 4.

[0106] Next, the configuration of the cylindrical fastening portion 4 of the double container 300 according to the third embodiment and its engagement with other members will be described with reference to Figures 19 and 20. Note that descriptions of the configuration and shape similar to those of the first embodiment will be omitted.

[0107] Fig. 19 is an explanatory diagram of the engagement between the inner container 1 and the cylindrical fastening part 4 of the double container 300 according to the third embodiment. In Fig. 19, (a) is a bottom perspective view of the inner container 1, and (b) is a top perspective view of the cylindrical fastening part 4.

[0108] 17, in this embodiment, the flange 17 of the inner container 1 is sandwiched between the lower surface of the upper surface 31 of the annular pressing member 3 and the upper end of the cylindrical fastening portion 4. Therefore, a refill-side fixing portion is provided on the flange 17 of the inner container 1, and a flange fixing portion is provided on the upper end of the cylindrical fastening portion 4.

[0109] In detail, as shown in FIG. 19(a), the flange 17 of the inner container 1 of this embodiment is provided with a plurality of ribs 19 protruding downward around the outer edge of the lower surface of the ring plate 18 as a refill side fixing portion, similar to the first embodiment.

[0110] On the other hand, as shown in FIG. 19(b), in the cylindrical fastening portion 4 of this embodiment, an inner ring 42 having a plurality of grooves 43 formed therein is provided as a flange receiving portion 41 at the upper end of the outer peripheral tube 40.

[0111] In this embodiment, multiple ribs 19 of the flange 17 of the inner container 1 in Figure 19(a) fit into multiple grooves 43 of the flange receiving portion 41 of the tubular fastening portion 4 shown in Figure 19(b), thereby regulating the rotation and position of the inner container 1 relative to the tubular fastening portion 4.

[0112] 19(a) shows an example in which four ribs 19 (one not shown) are provided on the underside of the ring plate 18 as the plurality of ribs 19 provided on the flange 17, but the number of the ribs 19 as fixing parts for regulating rotation and position is not limited as long as it is one or more. Also, in FIG. 19(b) shows an example in which many grooves 43 are provided as the plurality of grooves 43 in the flange receiving part 41, but the number of the plurality of grooves 43 may be one or more and may be any other number as long as it is the same number as or a multiple of the number of the ribs 19. If the number of grooves 43 on the flange receiving part 41 is a multiple of the number of ribs 19 on the flange 17, the user can fit the grooves 43 and the ribs 19 together at a smaller rotation angle during assembly.

[0113] Fig. 20 is an explanatory diagram of the engagement between the annular pressing member 3, the cylindrical fastening portion 4, and the outer container 2B of the double container 300 according to the third embodiment. In Fig. 20, (a) is a bottom perspective view of the annular pressing member 3 and the cylindrical fastening portion 4, and (b) is a top perspective view of the outer container 2B.

[0114] In this embodiment, as shown in Figure 18, the annular pressing member 3 and the upper end of the tubular fastening portion 4 engage with each other in a state in which the flange 17 of the inner container 1 is sandwiched between the upper surface 31 of the annular pressing member 3 and the upper end of the tubular fastening portion 4 from above and below.

[0115] 20(a), the tubular fastening portion 4 is provided with a helical screw projection 45 on the outer periphery of the outer circumferential tube 40 as an engagement portion with the annular pressing member 3. Meanwhile, the annular pressing member 3 is provided with a helical screw projection 33 on the inner circumferential surface of the peripheral wall 32 as an engagement portion with the tubular fastening portion 4.

[0116] Then, as shown in Figure 18, with the flange 17 of the inner container 1 sandwiched from above and below between the upper surface 31 of the annular holding member 3 and the flange receiving portion 41 near the upper end of the outer tube 40 of the tubular fastening portion 4, the helical screw protrusion 45 on the outer surface of the outer tube 40 of the tubular fastening portion 4 engages with the helical screw protrusion 33 on the peripheral wall 32 of the annular holding member 3, thereby engaging the tubular fastening portion 4 and the annular holding member 3 while fixing the inner container 1.

[0117] In this way, once assembled by threaded engagement when the refill is attached, the annular pressing member 3 and the cylindrical fastening portion 4 maintain the engaged state during normal use and are not disassembled.

[0118] As shown in Figures 19(b) and 20(a), the tubular fastening portion 4 has an inner tube 44 hanging down from the inner edge of the inner ring 42 and a plurality of band-shaped protrusions 46 extending vertically on the inner surface of the outer tube 40 as engagement portions with the outer container 2B.

[0119] On the other hand, as shown in FIG. 20(b), in the outer container 2B, the upper end of the outer wall 22 is a thin-walled portion 221, and a band-shaped groove portion 29 is formed in the thin-walled portion 221 as an engagement portion (fastening portion receiving portion) with the tubular fastening portion 4.

[0120] The belt-shaped protrusion 46 of the cylindrical fastening part 4 is fitted into the belt-shaped groove 29 of the outer container 2B to restrict relative movement in the rotational direction, while the position of the cylindrical fastening part 4 is restricted so as not to separate vertically from the outer container 2B. Possible methods for restricting the vertical position of the cylindrical fastening part 4 relative to the outer container 2B include (1) an undercut fitting type, (2) an adhesive type, and (3) an elastic fitting type.

[0121] (1) When the position is regulated by the undercut fitting type, an annular ridge or intermittent linear ridge extending along the circumference, or two or more bump-like ridges are provided on the outer peripheral surface of the thin-walled portion 221 of the outer container 2B, and two or more undercuts such as ridges, annular ridges, or intermittent linear ridges are provided on the lower end of the inner peripheral surface of the outer tube 40 of the tubular fastening portion 4. Then, when engaging, the ridge (or ridge) on the tubular fastening portion 4 side overcomes the ridge (or ridge) of the outer container 2B by being pushed in, thereby regulating the position of the tubular fastening portion 4 so that it does not separate from the outer container 2B in the vertical direction, and the tubular fastening portion 4 and the outer container 2B engage with each other.

[0122] (2) When the position is restricted by adhesion, the thin-walled portion 221 of the outer container 2B and the inner circumferential surface of the outer tube 40 and the outer circumferential surface of the inner tube 44 of the tubular fastening portion 4 that sandwiches the thin-walled portion 221 are bonded with an adhesive by fitting the band-shaped protrusion 46 into the band-shaped groove portion 29, thereby fixing the tubular fastening portion 4 to the outer container 2B. Note that when the tubular fastening portion 4 is fixed to the outer container 2B by methods (2) and (3), it is assumed that after fixing, it will not come off the outer container 2B even when replacing the refill.

[0123] (3) In the case of regulating the position by elastic fitting, the tubular fastening portion 4 is made of elastic rubber or the like, and the thin-walled portion 221 of the outer container 2B is pressed and sandwiched between the outer tube 40 and the inner tube 44 of the tubular fastening portion 4, whereby the tubular fastening portion 4 is fixed to the outer container 2B and its position in the vertical direction is regulated.

[0124] In this manner, in the cylindrical fastening portion 4, whose position is restricted in the circumferential and vertical directions relative to the outer container 2B, the multiple groove portions 43 engage with the rib 19, which is the refill side fixing portion of the flange 17A, so that the inner container 1 is fixed and held to the outer container 2B via the cylindrical fastening portion 4.

[0125] In addition, in Figure 20 (a), a configuration is shown in which the tubular fastening portion 4 and the annular pressing member 3 are engaged by a screw-threaded engagement, but the tubular fastening portion 4 and the annular pressing member 3 may also be engaged by, for example, a fitting method in which the tubular fastening portion 4 and the annular pressing member 3 are fitted over a projection or by other methods.

[0126] Regardless of which method is used, when attaching or removing the cap 6 to or from the mouth 14 of the inner container 1, it is preferable that when a user grasps the outer wall 22 of the outer container 2B and the cap 6 and rotates the outer wall 22B and the cap 6 relative to one another, the annular pressing member 3, the tubular fastening portion 4, and the outer container 2B are engaged with each other in a manner that restricts rotation to the extent that the annular pressing member 3 does not rotate relative to the outer wall 22.

[0127] However, if the cap 6 is attached to the mouth 14 of the inner container 1 by a method other than rotation, such as screwing, for example, by simply placing it over the mouth, by a push-up method, or by a hinge cap, the outer container 2B and the annular holding member 3 do not need to be engaged in a way that restricts rotation, and an engagement method that restricts only the vertical direction and not rotation (see Figure 16) may be used.

[0128] In this embodiment, by providing the cylindrical fastening portion 4 in the double container 300, it is possible to provide a flange receiving portion and a helical screw protrusion, which are complex shapes, on the cylindrical fastening portion 4 side, not on the outer container 2B. Therefore, even when the outer container 2B is formed from glass, for example, it is not necessary to provide the outer container 2B with small fragile parts, and the strength of the entire outer container 2B can be increased.

[0129] (Modification) In this embodiment, the engagement between the flange shown in Figure 19 and the flange receiving portion of the tubular fastening portion that regulates rotation of the flange from below has been described as being similar to the engagement between the flange shown in Figure 10 and the flange receiving portion of the outer container. However, as a modified example of a double container having a tubular fastening portion, an engagement configuration using a polygon and a polygonal tube, as shown in Figure 15 of the second embodiment, may also be used.

[0130] In other words, the flange of the inner container has a polygonal outer shape when viewed from above, and the flange receiving portion at the upper end of the outer tube 40 of the tubular fastening portion 4 has a polygonal tubular shape, and the polygonal outer shape of the flange fits into the polygonal tubular shape at the upper end of the tubular portion of the tubular fastening portion, thereby restricting rotation of the inner container relative to the outer container.

[0131] <Fourth embodiment> Next, a double container 400 according to a fourth embodiment including the container of the present invention will be described with reference to FIGS.

[0132] First, the schematic configuration of the double container 400 will be described with reference to Figures 21 and 22. Figure 21 is an explanatory diagram of the double container 400 according to the fourth embodiment of the present invention. In detail, Figure 21 is a half cross-sectional view of the double container 400, with the left side showing an external view and the right side showing a cross-sectional view. Figure 22 is an exploded see-through view of the double container 400 according to the fourth embodiment.

[0133] In this embodiment, the components of the members are similar to those in the third embodiment, but the shape of a tubular fastening portion 4C is different from that of the tubular fastening portion 4 in the third embodiment.

[0134] In this embodiment, the tubular fastening part 4C has, as an outer tubular part, an upper small diameter tube 47 and a lower large diameter tube 48 having a larger diameter than the upper small diameter tube 47. In the assembled state shown in Fig. 22, the peripheral wall 32 of the annular pressing member 3 covers the outer periphery of the upper small diameter tube 47 of the tubular fastening part 4C, and the lower large diameter tube 48 of the tubular fastening part 4C is exposed to the outside.

[0135] The configuration of the cylindrical fastening portion 4C of this embodiment will be described below with reference to Fig. 21 to Fig. 23. Fig. 23 is an explanatory diagram of the cylindrical fastening portion 4C of the double container 400 according to the fourth embodiment. In Fig. 23, (a) is a top perspective view of the cylindrical fastening portion 4C, and (b) is a bottom perspective view of the cylindrical fastening portion 4C.

[0136] 23(a), in the cylindrical fastening portion 4C of the present embodiment, a flange receiving portion 41C is provided on the upper portion of the inner surface of an upper small diameter tube 47, and a helical screw protrusion 45C is provided on the outer surface. In addition, the flange receiving portion 41C includes a ring 42C and a plurality of grooves 43 formed in the ring 42C, and an inner peripheral tube 44C hangs down from the inner peripheral edge of the ring 42C.

[0137] 23(b), a band-shaped protrusion 46C for engaging with the outer container 2C is provided on the lower part of the inner surface of the lower large diameter cylinder 48. That is, in this embodiment, the band-shaped protrusion 46C of the cylindrical fastening part 4C is provided only on the inner surface of the lower large diameter cylinder 48, and is not provided on the upper small diameter cylinder 47. Therefore, in the cylindrical fastening part 4C, the helical screw protrusion 45C of the upper small diameter cylinder 47 and the upper large diameter cylinder 48C are provided in regions that do not overlap in the lateral direction.

[0138] Therefore, when forming the tubular fastening portion 4C, in a configuration in which the helical screw protrusion 45C and the band-shaped protrusion 46C are not formed on the same tubular portion, both the lower large diameter tube 48 and the upper small diameter tube 47 can be made thinner than in a configuration of the tubular fastening portion 4 in which the helical screw protrusion 45C and the band-shaped protrusion 46C are formed in areas that laterally overlap inside and outside the same tubular portion.

[0139] As a result, in the double container 400 using the cylindrical fastening portion 4C of this embodiment, the diameter of the side shape of the bottle body of the outer container 2C and the inner container 1C can be made thinner throughout the double container 400 than in the third embodiment.

[0140] Although the preferred embodiments of the present invention have been described in detail above, the present invention is not limited to such specific embodiments, and various modifications and changes are possible within the scope of the gist of the embodiments of the present invention described in the claims. [Explanation of symbols]

[0141] 1, 1β, 1A, 1C Containers (inner containers, refill containers) 2,2β,2B,2C outer container 3, 3β, 3A Annular retaining member 4,4C Tubular fastener 5 Inner stopper 6 Cap 7 Dispenser 10,10β Bottle body (bottle part, storage part) 11 Bottom 12 Torso 13 Shoulder 14 Mouth 15 Standing cylinder part 16 Spiral screw protrusion 17,17A Flange (brim) 18 Ring Plate 18A Perforated polygonal plate (refill side fixing part) 19 Multiple ribs (one or more ribs, refill side fixing part) 21 Bottom 22 Exterior Wall 23, 23A Flange receiving part 24 Inner Ring 24A Inner stop ring 25 Multiple grooves (one or more grooves, flange receiving parts) 25A polygonal tube 26,6A Outer engaging part 27,27B Top thin section 28 Spiral screw protrusion 29 Belt-shaped groove (fastening part receiving part) 31 Top side 32 Peripheral wall 33 Spiral screw protrusion 40 Peripheral tube 41 Flange receiving part 42 Inner Ring 43 Multiple grooves (one or more grooves, flange receiving parts) 44 Inner cylinder 45 Spiral screw protrusion 46 Cervix 100,100α double container 200,200β double container 300 double container 400 double container O1 Hole in inner container (center hole) O2 outer container opening O3 Hole in annular retainer O5 Hole of inner plug X, Xα Contents storage container (refill) Y, Yα, YB housing

Claims

1. A refill container housed in an outer container, A bottle body having a bottomed cylindrical shape and a shoulder portion with a central hole formed in the center of the upper surface; a mouth portion extending upward from an edge portion of a central hole of the shoulder portion of the bottle body; a flange extending outwardly from an outer periphery of the mouth and spaced from the shoulder; The bottle body, the mouth portion, and the flange are integrally formed of resin, At least a portion of the flange is larger than the shoulder portion when viewed from above, and the flange is fixed to the outer container when the refill container is housed in the outer container. A refill container; A bottomed cylindrical outer container that houses the refill container; a ring-shaped pressing member that presses the upper surface of the flange of the refill container from above and has a through hole through which the upper part of the mouth portion is inserted; A cylindrical fastening portion is disposed between a lower surface of the flange of the refill container and an upper end of an outer wall of the outer container, The annular pressing member and the upper end of the cylindrical fastening portion are engaged with each other in a state in which the flange of the refill container is sandwiched between the annular pressing member and the upper end of the cylindrical fastening portion, The flange is provided with a refill side fixing portion, A flange receiving portion is provided at an upper end of the cylindrical fastening portion, The flange receiving portion of the cylindrical fastening portion, the position of which is restricted with respect to the outer container, engages with the refill side fixing portion of the flange, so that the refill container is fixed and held to the outer container via the cylindrical fastening portion. double container.

2. The flange of the refill container is provided with one or more ribs protruding downward around the outer edge of the lower surface as the refill-side fixing portion, The upper end of the cylindrical fastening portion is provided with one or more grooves as the flange receiving portion, The one or more ribs of the flange are fitted into the one or more grooves of the cylindrical fastening portion, thereby restricting the rotation and position of the refill container relative to the cylindrical fastening portion. The double container according to claim 1.

3. The refill container further includes a cap that can cover, from above and on an outer circumferential side, a portion of the mouth of the refill container that extends upward beyond the through hole of the annular pressing member in an assembled state. The double container according to claim 1 or 2.

4. The outer container is made of glass. The double container according to any one of claims 1 to 3.

Images