Double container and double container with cap

Abstract

To provide a double container configured so that an inner container can be attached and detached smoothly even when a user tightly grasps a tab which engages with an outer container.SOLUTION: A double container 3 comprises an outer container 2 and an inner container 1. The outer container has a cylindrical mouth part 21, and the inner container has an upper end flange 13 and a hang-down tab 15A hanging down from an outer edge of the upper end flange. A mouth part of the outer container is provided with thick parts 22A and B and a belt-like thin part 23A dented in a step-shape in a radial direction from end portions of the thick parts. Spiral protrusions are formed on outer peripheral surfaces of the thick parts of the outer container. Portions near upper ends of the thick parts protrude to a rear side in an opening direction to form a retaining protrusion 25, in a step of a boundary between the thick parts positioned at a front side in an opening direction and the thin part 23A. At least a portion of a lower protruding part 16 of the hang-down tab which protrudes forward at a vicinity of a lower end is positioned below the retaining protrusion, in a state where the inner container is attached to the outer container, at a side edge at a front side in the opening direction of the hang-down tab 15A of the inner container.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a double container and a double container with a cap. [Background technology]

[0002] In recent years, from the environmental perspective of the SDGs (Sustainable Development Goals), refillable containers (replacement containers) that can be replaced with new containers after the contents have been used up have been proposed.

[0003] When the inner container is replaceable, it is preferable that the inner container be engaged with the outer container during normal use. For example, Patent Document 1 discloses a structure in which, as shown in Fig. 1, an inner lower end protrusion 98 of a tab-shaped claw 97 hanging down from the outer edge of a flange 95 located at the upper end of an inner container 90 engages with a protrusion 87 provided on the outer peripheral surface of the upper end of an annular wall 81 of an outer container 80. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 6831267 Summary of the Invention [Problem to be solved by the invention]

[0005] However, in Patent Document 1, because the inner lower end protrusion of the claw portion 97 overcomes and engages with the protruding portion 87 in the radial direction, if the user grips the claw portion 97 too tightly when removing the inner container from the outer container, the inner lower end protrusion 98 may have difficulty overcoming the protruding portion 87, which may result in the inner container 90 not being able to be removed from the outer container 80. Furthermore, it is difficult to adjust the fitting strength, and if manufacturing variations occur when the outer container is made of a material that is difficult to deform, such as glass, there is a possibility that problems may occur, such as the refill being too hard to remove or being too loose.

[0006] In view of the above circumstances, the present invention has an object to provide a double container that allows the inner container to be smoothly attached and detached even if the user tightly grips the tab that engages with the outer container. [Means for solving the problem]

[0007] In order to solve the above problem, in one aspect of the present invention, A double container having an outer container and an inner container that is replaceably accommodated in the outer container, the outer container has a bottom wall, a side wall, and a cylindrical mouth portion located on the side wall; the inner container has a storage section including a bottom and side surfaces for storing contents, an upper flange protruding radially outward from the entire upper periphery of the side surfaces, and a hanging tab hanging down from the outer edge of the upper flange; The mouth of the outer container has an inner surface that is a continuous circumferential surface, and is provided with a thick-walled portion that is thick in a radial direction from the inner surface, and a band-like thin-walled portion that is recessed in a stepped shape in the radial direction from an end of the thick-walled portion and is shorter in the circumferential direction than the thick-walled portion, a helical protrusion is provided on the outer peripheral surface of the thick-walled portion of the outer container, the helical protrusion being capable of threadably engaging with a cap having a female thread; When the direction in which the cap is released from the threaded engagement with the opening portion of the outer container is defined as the opening direction in the circumferential direction, a part of the thick-walled portion near the upper end thereof protrudes rearward in the opening direction at a step at the boundary between the thin-walled portion and the thick-walled portion located on the front side in the opening direction, thereby forming a retaining protrusion; a lower protrusion protruding forward near a lower end of the front edge of the hanging tab of the inner container in the opening direction, When the inner container is attached to the outer container, at least a part of the lower protrusion of the hanging tab is located below the retaining protrusion. A double container is provided. [Effects of the Invention]

[0008] According to one aspect, in a double container, even if a user strongly grips the tab that engages with the outer container, the inner container can be smoothly attached and detached. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 10 is an exploded side cross-sectional view of a double container according to a conventional example. [Figure 2] 1 is a perspective view of a double container according to a first embodiment of the present invention. [Figure 3] FIG. 1 is a longitudinal cross-sectional view of a double container with a cap according to a first embodiment. [Figure 4] FIG. 2 is an exploded perspective view of the inner container and outer container of the double container according to the first embodiment. [Figure 5] 5A to 5C are explanatory views of the operation of the hanging tab relative to the opening of the outer container when the inner container is attached in the first embodiment. [Figure 6] FIG. 10 is an enlarged view showing a modified example of the retaining protrusion of the outer container according to the first embodiment. [Figure 7] FIG. 4 is a perspective view of a double container according to a second embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0010] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The following describes embodiments of the present invention with reference to the accompanying drawings. In the following drawings, the same components are designated by the same reference numerals, and redundant explanations may be omitted.

[0011] The present invention relates to a double container, in particular a double container for containing a viscous or solid substance, and a double container with a cap.

[0012] It is preferable that 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 viscous or solid substances that are to be used in portions.

[0013] In this specification, viscous substances refer to viscous cosmetics such as viscous creams, hair waxes, ointments, viscous medicines, viscous soaps, etc. Solid substances refer to solid or semi-solid cosmetics such as particularly hard hair sticks, hair waxes, and solid beauty serums (for example, those with a similar hardness to stick beauty serums), as well as solid soaps, cheese, butter, and other foods.

[0014] In the present invention, the viscous substance or solid substance is pre-filled in the storage section and is filled by replacing the entire inner container as a refill (refill container). Alternatively, the viscous substance or solid substance may be filled into the inner container while the inner container is set in the outer container during manufacturing.

[0015] <Overall configuration of the first embodiment> First, the overall configuration of the double container according to the first embodiment of the present invention will be described with reference to Figures 2 to 4. Figure 2 is a perspective view of the double container according to the first embodiment of the present invention. Figure 3 is a vertical cross-sectional view of the capped double container according to the first embodiment, where (a) corresponds to the cross-section along AA' in Figure 2 and (b) corresponds to the cross-section along BB' in Figure 2. Figure 4 is an exploded perspective view of the inner container and outer container of the double container according to the first embodiment.

[0016] The double container 3 according to this embodiment comprises an inner container 1 and an outer container 2. The double container 3 shown in Fig. 2 has a wide-mouthed, low-profile jar shape, but the double container 3 may also have a vertically long bottle shape. The inner container 1 may or may not be self-standing, and the outer container 2 is a self-standing container.

[0017] 2 to 4, the inner container 1 is a cylindrical container with a bottom, consisting of a bottom surface 11 and side surfaces 12, and has a storage section 10 for storing contents. The inner container 1 further has an upper flange 13 that projects outward from the upper end of the side surface 12, and two hanging tabs 15A and 15B that hang down in an arc-shaped cross section from a part of the outer edge of the upper flange 13. An annular protrusion 14 is provided on the upper surface of the upper flange 13. The annular protrusion 14 functions as an airtight rib when engaged with the cap 4. A plurality of vertical ribs 18 are provided near the upper end of the outer surface of the side surface 12. The provision of the vertical ribs 18 prevents the inner container 1 from rattling relative to the outer container 2. The hanging tabs 15A and 15B will be described in detail below.

[0018] The outer container 2 is a container housing portion that replaceably houses the inner container 1. The outer container 2 has a case portion 20 having a bottom wall 201, a side wall 202, and a shoulder portion 203. In the outer container 2, the shoulder portion 203 that extends inward is provided at the upper end of the side wall 202, and a cylindrical mouth portion 21 that extends upward is provided from the inner edge of the shoulder portion 203. As shown in Fig. 3, the cylindrical mouth portion 21 has a smaller diameter than the side wall 202 of the case portion 20 and is located more inward than the side wall 202.

[0019] The cylindrical mouth portion 21 has thick-walled portions (thick-walled mouth portions) 22A, 22B, 22B and thin-walled portions (thin-walled mouth portions) 23A, 23B. Referring to FIG. 4, the inner surface of the mouth portion 21 is a continuous circumferential surface, and the outer surface, except for the lower end, is provided with a plurality of alternating thick-walled portions 22A, 22B and thin-walled portions 23A, 23B, where the thickness from the circumferential surface changes in a stepped manner. More specifically, the thin-walled portions 23A, 23B are rectangular regions of the mouth portion 21 that are partially recessed on the outside, and extend from the upper end of the mouth portion 21 but do not reach the lower end. Therefore, in the mouth portion 21, the portions below the thin-walled portions 23A, 23B are thick-walled portions 22 that are the same thickness as the thick-walled portions 22A, 22B.

[0020] In the portions of the mouth 21 other than the lower end, the thick-walled portions 22A, 22B are circumferentially longer than the thin-walled portions 23A, 23B. An annular ridge 22P extending in the circumferential direction is provided around the entire outer circumference of the mouth 21 near the lower end. Threaded protrusions 24 are provided on the outer circumferential surfaces of the thick-walled portions 22A, 22B. In this embodiment, the threaded protrusions 24 are discontinued in the circumferential direction at the thin-walled portions 23A, 23B, but the lower annular ridge 22P is continuous in the circumferential direction and is provided below the thin-walled portions 23A, 23B. Note that the threaded protrusions 24 may be discontinued in the circumferential direction near the thin-walled portions 23A, 23B.

[0021] As shown in Figure 3(a), the double container 3 of the present invention can be engaged with a cap 4. The cap 4 is a lid that covers the upper flange 13 of the inner container 1 and the mouth 21 of the outer container 2. The cap 4 has a top surface 41 and a peripheral wall 42, and a screw projection 43 is provided on the inside of the peripheral wall 42. Although Figure 3 shows a cap made up of one piece, the cap may also be made up of two pieces, an outer cap and an inner cap. In this case, the outer diameter of the outer cap is the same size as the outer peripheral surface of the side wall 202 of the outer container 2, thereby making the entire double container with the cap flush and improving the design.

[0022] The screw projections 43 of the cap 4 are threadably engaged with the screw projections 24 provided on the mouth portion 21 of the outer container 2 .

[0023] 3(a) and 3(b), when the double container 3 is in the state, the depending tabs 15A and 15B of the inner container 1 are located radially inward of the apex of the thread of the screw projection 24 of the outer container 2. Therefore, when the cap 4 is rotated, the screw projection 43 of the cap 4 does not directly interfere with the depending tabs 15A and 15B.

[0024] Furthermore, a circular packing 5, which is a sealing material for preventing leakage, is provided on the inside (bottom side) of the top surface 41 of the cap 4. The packing 5 may be provided by adhering it to the cap 4, or may be provided separately from the cap 4.

[0025] When the cap 4 is engaged with the double container 3, the screw projection 24 on the mouth 21 of the outer container 2 and the screw projection 43 on the cap 4 are threadably engaged. Because the annular ridge 22P of the outer container 2 is located below the screw projection 24, when the double container 6 with the cap is in the state where it ...

[0026] The packing 5 that is in close contact with the underside of the top surface 41 of the cap 4 is engaged in a state where it is sandwiched between the underside of the top surface 41 and the upper end flange 13 of the inner container 1.

[0027] In this embodiment, an annular protrusion 14, which is an airtight rib, is provided on the upper surface of the upper flange 13 of the inner container 1. Therefore, when the cap 4 is engaged with the double container 3, the annular protrusion 14 comes into close contact with the packing 5, making the capped double container 6 airtight, i.e., a sealed state that prevents air from entering or leaving. Therefore, because the cap 4 and the double container 3 are engaged while the annular protrusion 14 of the upper flange 13 comes into close contact with the elastic packing 5 to create an airtight state, the contents will not leak even if the capped double container 6 is tilted or turned upside down.

[0028] If the packing 5 is not provided, the annular projection 14 of the upper flange 13 is in direct contact with the underside of the top surface of the cap 4, and the cap 4 and the double container 3 engage, creating an airtight state. In this case as well, the contents will not leak even if the capped double container is tilted or turned upside down.

[0029] The direction in which cap 4 rotates relative to mouth 21 of outer container 2, loosening the screws and releasing the threaded engagement, as indicated by the curved arrow in Fig. 2, is defined as opening direction O. Note that in Figs. 2 and 4, one thin-walled portion 23A and depending tab 15A of double container 3 are visible, but the other thin-walled portion 23B and depending tab 15B also have the same shape.

[0030] 2 and 4, at a step (front step) SF at the boundary between the thin-walled portion 23A of the mouth 21 of the outer container 2 and the thick-walled portion 22B located on the front (right) side in the opening direction O, a part near the upper end of the thick-walled portion 22B protrudes rearward in the opening direction O to form a retaining protrusion 25. In this configuration, the upper end of the retaining protrusion 25 is provided so as to be connected to the upper end of the thick-walled portion 22B on the same straight line. In addition, the tip of the retaining protrusion 25 is rounded and semicircular.

[0031] 2 and 4, the hanging tab 15A of the inner container 1 is a hanging piece hanging from the outer edge of the upper flange 13, and is a tongue-shaped holding piece (claw portion) for holding the outer container 2 from the outside and engaging with a part of the outer container 2. In this embodiment, a semicircular lower protrusion 16 protruding forward is provided at the front side edge TF (right side edge in FIG. 4) of the hanging tab 15A in the opening direction O, below the retaining projection 25 of the outer container 2.

[0032] In this configuration, the hanging tab 15A has an opening 17 formed therein, so that the portion other than the lower protruding portion 16 has a frame shape. The formation of the opening 17 improves the ability to pull up the inner container 1 by punching when molding the inner container 1, and also makes the hanging tab 15A more easily deformed when the inner container 1 is attached to or detached from the outer container 2.

[0033] In this embodiment, when the double container 3 is in the state where the inner container 1 is attached to the outer container 2, the lower protrusion 16 of the hanging tab 15A of the inner container 1 is positioned below the anti-slip protrusion 25 of the outer container 2, as shown in Figure 2, so that the inner container 1 and the outer container 2 are engaged with each other.

[0034] 3, if the double container 3 is left for a long period of time with the cap 4 engaged, the contents of the inner container 1 will suck in the air inside the container, creating negative pressure inside the inner container 1. Alternatively, if a typhoon passes over the location where the double container 6 with the cap is placed, or if the double container 6 with the cap is carried on an airplane and flies, the change in air pressure will create negative pressure inside the inner container 1 after the typhoon has passed or after the airplane lands.

[0035] Due to the above circumstances, when the pressure inside the inner container 1 becomes negative, the packing 5 is strongly attracted to the upper flange 13. In this state, when the cap 4 is turned in the opening direction O to release the engagement between the double container 3 and the cap 4, the attraction of the packing 5 applies a force in a direction that causes the inner container 1 to be removed from the outer container 2, and the hanging tab 15A tries to move toward the front step SF along the opening direction O (rotation direction).

[0036] However, in the configuration of the present invention, a retaining protrusion 25 is provided at the mouth 21 of the outer container 2, so even if a pulling force is applied to the hanging tab 15A in the opening direction O due to the suction of the gasket 5, a part of the hanging tab 15A (front side edge TF) comes into contact with the tip of the retaining protrusion 25, thereby preventing the inner container 1 from coming off the outer container 2.

[0037] Alternatively, even if a user grasps the hanging tabs 15A and 15B and lifts the double container 3, exerting an upward pulling force on the inner container 1 including the hanging tab 15A, the lower protrusion 16 of the hanging tab 15A comes into contact with the lower part of the anti-slip projection 25, thereby preventing the inner container 1 from coming off the outer container 2.

[0038] That is, in this embodiment, when the capped double container 6 is in a state where the cap 4 is rotated in the opening direction to loosen the screw or gripped, regardless of whether an upward or rotational force is applied to the hanging tab 15A, a part of the hanging tab 15A comes into contact with a part of the anti-slip protrusion 25 of the mouth portion 21, thereby preventing the outer container 2 and the inner container 1 from disengaging.

[0039] 2 to 4 show an example in which two hanging tabs 15A, 15B are provided in the inner container 1, but the number of hanging tabs 15 in the inner container 1 may be one or three or more. Similarly, an example in which two thin-walled portions 23A, 23B are provided in the mouth 21 of the outer container 2 is shown, but the number of thin-walled portions 23 may be the same as the number of hanging tabs 15, or may be greater than the number of hanging tabs 15, and if the number of thin-walled portions is greater than the number of hanging tabs 15, the number of thin-walled portions is a multiple of the number of hanging tabs 15.

[0040] The inner container 1 is preferably made of, for example, a resin film coated with a metal. This provides airtightness and light blocking properties. For example, to provide flexibility, a metal layer may be formed by vapor-depositing a metal such as aluminum onto a plastic sheet. Note that the metal constituting or vapor-deposited is not limited to aluminum, and is preferably any of iron, gold, silver, titanium, tin, zinc, platinum, ruthenium, palladium, iridium, alloys (tinplate), or metal oxides (aluminum oxide (alumina), etc.).

[0041] When the material of the inner container 1 contains metal, the contents can contain substances that are easily degraded by oxygen and / or light. The contents are not limited to, but examples include, but are not limited to, vitamins (such as vitamins A and C) and their derivatives, as well as cosmetics, medicines, and foods that contain ingredients that are easily oxidized and deteriorated.

[0042] The resin with which the metal of the inner container 1 is coated or the resin that constitutes the inner container may be, for example, a polyester-based resin such as polypropylene (PP), polyethylene (PE), acrylonitrile butadiene styrene (ABS), polybutylene terephthalate (PBT), polyacetal (POM), or polyethylene terephthalate (PET), or a biodegradable resin.

[0043] The outer container 2 of the present invention is preferably molded from glass. Alternatively, the outer container 2 may be made of resin, wood, silicone, metal, paper, or the like. In the case of resin, it may be made of, for example, PP, PE, ABS, PBT, POM, PET, polyester resin, biodegradable resin, or other resin, similar to the inner container 1 described above. In the case of wood, 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, are included. In the case of paper, for example, it may be self-supporting cardboard.

[0044] The cap 4 of the present invention is made of resin such as PP, PE, ABS, PBT, POM, PET, or polyester resin, biodegradable resin, etc. The packing 5 is a foam packing made of resin (e.g., PP, PE, PET) or aluminum film.

[0045] As shown in the exploded view of Figure 4, the inner container 1 is a replaceable (removable and replaceable) refill together with the viscous or solid substance contained therein, while the outer container 2 is reusable after replacement.

[0046] Therefore, the empty inner container 1 can be replaced with a new refill of the same shape, and the outer container 2 can be used repeatedly.

[0047] The inner container 1 that can be replaced as a refill can have the upper flange 13 covered with a film or a cover that surrounds the upper flange 13. This allows the inner container 1 that is a refill to be distributed as a single unit.

[0048] As described above, in the state of the capped double container 6 of the present invention, even if a pulling force is applied to the hanging tab 15A in the opening direction O of the rotational direction due to the suction of the gasket 5 in order to open the cap 4, a part of the hanging tab 15A comes into contact with a part of the anti-slip protrusion 25, thereby preventing the outer container 2 and the inner container 1 from disengaging.

[0049] However, when removing the inner container 1 from the outer container 2 to replace the refill as shown in Figure 4, the user grasps the portion of the hanging tab 15A with one hand, holds the outer container 2 downward with the other hand, and lifts the inner container 1 upward, which causes a portion of the frame of the hanging tab 15A to deform, thereby disengaging the retaining projection 25 from the lower protrusion 16. The movement of the hanging tab 15 of the inner container 1 relative to the outer container 2 when attaching or detaching is described below.

[0050] (Movement of the hanging tab when the inner container is attached) Here, the movement of the hanging tab 15A when assembling the double container will be described with reference to Figure 5. Figure 5 is an explanatory diagram of the movement of the hanging tab 15A relative to the opening 21 of the outer container 2 when the inner container 1 of the first embodiment is attached.

[0051] When attaching the inner container 1 to the outer container 2, the hanging tab 15A is positioned above the upper opening edge of the thin-walled portion 23A, and the storage portion 10 of the inner container 1 is inserted inside the mouth portion 21 of the outer container 2 (Figure 5(a)).

[0052] When the inner container 1 is pushed downward, the rear edge TR of the hanging tab 15A in the opening direction O comes into contact with the rear edge SR of the thin-walled portion 23A and moves, and the lower protrusion 16 of the hanging tab 15A comes into contact with the retaining protrusion 25. As a result, the front edge TF of the hanging tab 15A in the opening direction O deforms toward the opening 17, and the lower protrusion 16 comes to a position facing the retaining protrusion 25 of the outer container 2 (FIG. 5(b)).

[0053] Furthermore, when the inner container 1 is pushed downward, the lower protrusion 16 of the hanging tab 15A passes over the anti-slip protrusion 25, the front side edge TF in the opening direction O returns to its original state, and the lower protrusion 16 comes to a stop below the anti-slip protrusion 25 (Figure 5(c)).

[0054] In this embodiment, the tip of lower protrusion 16 of hanging tab 15A located on the front side in opening direction O is semicircular, and the tip of retaining protrusion 25 located on the rear side in opening direction O is also semicircular. Therefore, when transitioning from Figure 5(a) to Figure 5(b) to Figure 5(c), the amount of pressing of lower protrusion 16 by retaining protrusion 25 gradually changes, and therefore the front side edge F of hanging tab 15A also gradually deforms, allowing for a smooth mating operation without impact.

[0055] As described above, in the configuration of the present invention, the depending tab 15A of the inner container 1 deforms in the circumferential direction while climbing over the retaining projection 25, and therefore the depending tab does not climb over the convex portion of the outer container in the radial direction during engagement. Therefore, even if the outer container is formed from a material that is difficult to deform and manufacturing variations occur in the outer container, when the inner container 1 is attached or detached, part of the depending tab 15A deforms in the circumferential direction while engaging and disengaging, thereby preventing the inner container 1 from becoming stuck in detachment from the outer container 2.

[0056] As a result, when the state changes from Figure 5(b) to Figure 5(c), the lower protrusion 16, which is the end portion on the front end side of the hanging tab 15A in the opening direction O, returns to its original shape after being deformed by contact with the anti-slip protrusion 25 on the front side edge TF, and enters the thin-walled portion 23A below the anti-slip protrusion 25.

[0057] In the state shown in Figure 5(c), the lower protrusion 16 of the hanging tab 15A enters the thin-walled portion 23A below the anti-slip projection 25, and the curved upper edge of the lower protrusion 16 comes into contact with the curved lower edge of the anti-slip projection 25, thereby restricting the vertical position of the inner container 1 relative to the outer container 2.

[0058] 5(c), the upper front edge TF of the lower protruding portion 16 of the hanging tab 15A contacts the tip of the retaining projection 25, and the rear edge TR of the hanging tab 15A is in linear contact with the rear edge SR of the thin portion 23A. With this configuration, the circumferential position of the hanging tab 15A is restricted with respect to the thin portion 23A, so that the engaging portion does not get overcome in the radial direction when the inner container 1 is attached to or detached from the outer container 2.

[0059] Therefore, when removing inner container 1 from outer container 2 to replace the refill, even if the user strongly grips hanging tab 15A that engages with outer container 2, this does not affect the disengagement of hanging tab 15A, so the inner container 1 does not become stuck and can be smoothly pulled up and removed. Also, when attaching inner container 1 to outer container 2, even if the user strongly grips hanging tabs 15A, 15B, they do not go over the tabs in the radial direction but engage in the circumferential direction, allowing for smooth attachment of inner container 1.

[0060] Furthermore, even if the outer container 2 is made of a material that is difficult to deform, such as glass, and manufacturing variations occur, the inner container 1 is prevented from coming off when the double container 3 is in place, preventing rattling of the inner container 1. Also, even if the outer container 2 is made of a material that is difficult to deform, such as glass, there is no radial overhang, making it difficult for the engaging portions to break.

[0061] Furthermore, even if a pulling force is applied to the hanging tab 15A in the opening direction O due to the suction of the gasket 5 when the double container 6 with the cap is in the state, the movement of the hanging tab 15A relative to the outer container 2 is restricted by contact between the front side edge TF of the hanging tab 15A and the tip of the anti-slip protrusion 25, and between the rear end edge TR and the rear end edge SR of the thin-walled portion 23A, and rattle of the engagement can also be restricted.

[0062] In addition, in this configuration, since it is assumed that the hanging tab 15A will deform when attached, the width of the hanging tab 15A excluding the lower protrusion 16 is set to a length that is in contact with or close to the distance from the upper end of the thin-walled portion 23A of the mouth 21, which is the stopper projection 25, to the rear end step SR. This dimensional configuration makes it possible to prevent rattling when the cap is rotated 4 times in the double container 3 state.

[0063] In this configuration, it is preferable that the thickness of the hanging tab 15A be 0.4 to 2.8 mm and the width of the front end edge TF be approximately 0.4 to 4.8 mm so that the front end edge TF can elastically deform circumferentially when it passes over the anti-slip protrusion 25.

[0064] As described above, when the lower protrusion 16 of the depending tab 15A is positioned below the retaining projection 25, even if a pulling force is applied to the depending tab 15A in the opening direction O of the rotational direction when the cap 4 is opened, the outer container 2 and the inner container 1 are prevented from disengaging. Furthermore, even if a force is applied to pull the inner container 1 upward for some reason, the lower protrusion 16 abuts against the retaining projection 25, so the inner container 1 will not come off from the outer container 2.

[0065] In this way, as long as the lower protrusion 16 of the hanging tab 15A is positioned below the retaining projection 25 of the outer container 2, it is possible to prevent the outer container 2 and the inner container 1 from disengaging from each other. Therefore, it is not necessary to highly precisely determine the dimensions of the lower protrusion 16 and the dimensions of the space in which the lower protrusion 16 can be positioned below the retaining projection 25 of the outer container 2. For example, even if the vertical dimension of the lower protrusion 16 is reduced to make the width of the lower protrusion 16 slim, forming a gap between the retaining projection 25 and the lower protrusion 16, it is still possible to prevent the outer container 2 and the inner container 1 from disengaging from each other.

[0066] <Modification of the First Embodiment (Retaining Protrusion)> In the mouth portion of the outer container 2 shown in Figure 4 above, the upper end of the anti-slip protrusion 25 is arranged so as to be connected to the upper end of the thick-walled portion 22B in the same straight line, but the configuration of the anti-slip protrusion 25 is not limited to the above configuration.

[0067] FIG. 6 is an enlarged view showing a modified example of the retaining protrusion of the outer container according to the first embodiment.

[0068] In the configuration shown in Fig. 6(a), the retaining projection 25α of the outer container 2α extends circumferentially from a position slightly lower than the upper end of the thick-walled portion 22Bα. When the retaining projection 25α is provided as in Fig. 6(a), although not shown, the hanging tab 15A of the inner container 1 is longer in the vertical direction than in the configuration in Fig. 4, and the lower protrusion 16 is positioned slightly lower.

[0069] In the configuration shown in Fig. 6(b), the retaining projection 25β ​​of the outer container 2β extends at an angle from the upper end of the thick-walled portion 22Bβ. Furthermore, although not shown, when the retaining projection 25β ​​is provided as in Fig. 6(b), the hanging tab 15A of the inner container 1 is longer in the vertical direction than in the configuration in Fig. 4, and the lower protrusion 16 is positioned slightly lower.

[0070] 6(a) and 6(b), the space below retaining projection 25 is narrower than the space shown in Fig. 4 and 5. However, even in this case, by making lower projection 16 of depending tab 15A narrower in width and slimmer in shape, lower projection 16 can be positioned in the space below retaining projection 25.

[0071] Second Embodiment 7 is a perspective view of the double container according to the second embodiment. In the following, the same components as those in the first embodiment are given the same reference numerals, and the description thereof will be omitted.

[0072] In this embodiment, the thin-walled portion 23C of the outer container 2γ is provided with retaining protrusions 25 and 26 at both ends in the circumferential direction.

[0073] In detail, the second anti-slip protrusion 26 is formed by the upper end of the thick-walled portion 22C protruding forward in the opening direction at the step at the boundary between the thin-walled portion 23C of the outer container 2γ and the thick-walled portion 22C located rearward in the opening direction O.

[0074] On the other hand, the hanging tab 15C of the inner container 1γ has lower protrusions 16 and 19 provided at both ends in the circumferential direction.

[0075] In this embodiment, when the inner container 1γ is engaged with the outer container 2γ, the front side edge TF and rear side edge TRγ of the hanging tab 15C are deformed toward the opening 17γ due to contact of the lower protrusions 16, 19 with the anti-slip protrusions 25, 26, and then the deformation returns to its original state, causing the lower protrusions 16, 19 to enter the thin-walled portion 23C below the anti-slip protrusions 25, 26.

[0076] 7, the upper edges of lower protrusions 16, 19 of depending tab 15C come into contact with the lower edges of retaining projections 25, 26, thereby restricting the vertical position of inner container 1γ relative to outer container 2γ. Therefore, even if a user grasps depending tabs 15C, 15D (not shown) and lifts double container 3γ, and an upward pulling force is applied to inner container 1γ including depending tab 15C, inner container 1γ is prevented from coming off outer container 2γ.

[0077] Furthermore, even if a force is applied to pull the hanging tab 15C in the opening direction O due to the adsorption of the packing 5, the front side edge TF of the frame portion of the hanging tab 15C comes into contact with the tip of the anti-slip protrusion 25, thereby preventing the inner container 1δ from coming off from the outer container 2δ.

[0078] Furthermore, even if a force is applied to pull the hanging tab 15C in the closing direction opposite to the opening direction O due to the adsorption of the gasket 5, the rear side edge TRγ of the hanging tab 15C comes into contact with the tip of the second anti-slip protrusion 26, thereby preventing the inner container 1γ from coming off the outer container 2γ.

[0079] 7, the upper front edge TF of the lower protruding portion 16 of the hanging tab 15C is in contact with the tip of the retaining projection 25, and the upper rear edge TFγ of the lower protruding portion 19 is in contact with the tip of the retaining projection 26. With this configuration, the circumferential position of the hanging tab 15C is restricted with respect to the thin-walled portion 23C, so that when the inner container 1γ is attached to or detached from the outer container 2γ, no radial movement of the engaging portion occurs.

[0080] When disengaging and engaging the inner container 1γ with the outer container 2γ for refill replacement, no problems occur even if the user tightly grips the hanging tab 15C that engages with the outer container 2, and the inner container 1γ can be smoothly attached and detached.

[0081] Furthermore, even if the outer container 2δ is made of a material that is difficult to deform, such as glass, and manufacturing variations occur, rattle of the inner container 1δ can be prevented when the outer container 2δ is engaged with the double container 3γ. Also, even if the outer container 2γ is made of a material that is difficult to deform, such as glass, there is no radial overhang, making it difficult for the engaged portion to break.

[0082] In this embodiment, when assembling the double container 3γ, the inner container 1γ is pressed downward, and the side edges TF and TRγ of the depending tab 15C deform toward the opening 17, and the lower protrusions 16 and 19 of the depending tab 15C of the inner container move over the retaining projections 25 and 26, then enter the thin-walled portion 23C below the retaining projections 25 and 26, thereby fitting into the outer container 2δ. In this configuration, the depending tab does not move over the protrusions of the outer container during radial engagement. Therefore, even if the outer container is molded from a material that is resistant to deformation and manufacturing variations occur in the outer container, when the inner container 1γ is attached or detached, a portion of the depending tab 15C deforms circumferentially to engage and disengage, preventing the inner container 1γ from becoming stuck in the outer container 2γ.

[0083] In this embodiment, the upper ends of the anti-slip protrusions 25, 26 are arranged so as to be connected to the upper ends of the thick portions 22D, 22C in the same straight line, but the configuration of the anti-slip protrusions 25, 26 may also be as shown in Figures 6(a) and 6(b).

[0084] 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]

[0085] 1, 1γ inner container 2, 2α, 2β, 2γ outer container 3, 3γ double container 4 Cap 5. Packing (sealing material) 6 Double container with cap 10 Storage section 11 Bottom 12 Side 13 Upper flange 14 Annular convex part 15A, 15B, 15C Hanging tab (hanging piece, tab) 16 Lower protrusion 17 Opening 19 Second lower protrusion 20 Case part 201 Bottom wall 202 Side wall 203 Shoulder 21, 21α, 21β, 21γ, 21δ Mouth 22, 22A, 22B, 22C, 22D Thick wall part (mouth thick wall part) 22P Annular ridge 23A, 23B, 23Aα, 23Aβ, 23C Thin wall part (mouth thin wall part) 25, 25α, 25β Anti-slip protrusion 26 Second retaining protrusion 3, 3γ double container TF anterior lateral border TR, TRγ posterior lateral border

Claims

1. A double container having an outer container and an inner container that is replaceably accommodated in the outer container, the outer container has a bottom wall, a side wall, and a cylindrical mouth portion located on the side wall; the inner container has a storage section including a bottom and side surfaces for storing contents, an upper flange protruding radially outward from the entire upper periphery of the side surfaces, and a hanging tab hanging down from the outer edge of the upper flange; The mouth of the outer container has an inner surface that is a continuous circumferential surface, and is provided with a thick-walled portion that is thick in a radial direction from the inner surface, and a band-like thin-walled portion that is recessed in a stepped shape in the radial direction from an end of the thick-walled portion and is shorter in the circumferential direction than the thick-walled portion, a helical protrusion is provided on the outer peripheral surface of the thick-walled portion of the outer container, the helical protrusion being capable of threadably engaging with a cap having a female thread; When the direction in which the cap is released from the threaded engagement with the opening portion of the outer container is defined as the opening direction in the circumferential direction, a part of the thick-walled portion near the upper end thereof protrudes rearward in the opening direction at a step at the boundary between the thin-walled portion and the thick-walled portion located on the front side in the opening direction, thereby forming a retaining protrusion; a lower protrusion protruding forward near a lower end of the front edge of the hanging tab of the inner container in the opening direction, When the inner container is attached to the outer container, at least a part of the lower protrusion of the hanging tab is located below the retaining protrusion. double container.

2. The hanging tab has an opening formed therein, so that the hanging tab has a frame-like shape, When the inner container is attached to the outer container, a force is applied from above to push the inner container against the outer container, causing the anti-slip protrusion of the outer container to push the vicinity of the lower protrusion of the hanging tab of the inner container rearward in the opening direction, and then the lower protrusion of the hanging tab moves below and engages with the anti-slip protrusion. The double container according to claim 1.

3. The tip of the retaining protrusion and the tip of the lower protrusion are rounded. The double container according to claim 1.

4. a second retaining protrusion is formed by a part of the thick-walled portion near an upper end thereof protruding toward the front side in the opening direction at a step at a boundary between the thin-walled portion and the thick-walled portion located on the rear side in the opening direction, a second lower protrusion protruding rearward near a lower end of the trailing tab of the inner container at a rear edge in the opening direction, When the inner container is attached to the outer container, at least a part of the second lower protrusion of the hanging tab is located below the second retaining protrusion. The double container according to claim 1.

5. an annular protrusion is provided on the upper surface of the upper end flange of the inner container; The inner container is made of resin. The double container according to claim 1.

6. The outer container is made of glass. The double container according to claim 1.

7. A double container according to any one of claims 1 to 6; a cap having an internal thread that can be threadably engaged with the mouth of the outer container; Double container with cap.

8. A sealant is provided on the underside of the top surface of the cap. The double container with a cap according to claim 7.

Images