Double container and double container with cap

Abstract

To provide a double container configured so that a portion involved in engaging an inner container with an outer container is prevented from breaking although the outer container is formed of materials which hardly deform.SOLUTION: A double container 3 comprises an outer container 2 and an inner container 1. The outer container 2 has a cylindrical mouth part 21, and the inner container 1 has a hang-down tab 14A. The mouth part 21 of the outer container 2 is provided with thick parts 22A and 22B which are large in thicknesses in a radial direction from an inside surface thereof and a thin part 23A dented in a step-shape in the radial direction. When a direction in which screw-engagement of cap with the mouth part 21 is released is defined as an opening direction O, 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 22B and the thin part 23A. A lower side of the dented part is a lower extending part 14LE long on the front side. In a state where the inner container 1 is attached to the outer container 2, at least a portion of the lower extending part 14LE of the hang-down tab 14A is positioned below the retaining protrusion 25.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 that can be replaced with new ones 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 Figure 1, inner lower end protrusions 98 of claws 97 hanging down from the outer edge of a flange 95 located at the upper end of an inner container 90 engage with protrusions 87 provided on the outer peripheral surface of the upper end of annular wall 81 of 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, the inner lower end protrusion 98 of the claw portion 97 overcomes and engages with the protrusion 87 in the radial direction, so if the outer container 80 were molded from glass, there was a possibility that the protrusion 87 of the outer container 80 would be damaged due to the impact of the claw portion 97 overtaking it.

[0006] In view of the above circumstances, the present invention aims to provide a double container that does not cause damage to the parts that engage the inner and outer containers, even if the outer container is made of a material that is difficult to deform. [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 surface 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 the radial direction from the inner surface, and a 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 recess formed at or near the upper end of the inner container at a front side edge of the hanging tab in the opening direction, the recess being recessed at or near the upper end, and a lower extending portion extending forward below the recess; When the inner container is attached to the outer container, at least a part of the lower extension of the hanging tab is located below the retaining protrusion. A double container is provided. [Effects of the Invention]

[0008] According to one aspect, even if the outer container in a double container is made of a material that is difficult to deform, damage to the portion involved in the engagement between the inner container and the outer container is prevented. [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. 2 is an enlarged perspective cross-sectional view of the double container according to the first embodiment, taken along a line passing through a lower extension of a hanging tab. [Figure 7] FIG. 10 is an enlarged view showing a modified example of the retaining protrusion of the outer container according to the first embodiment. [Figure 8] FIG. 10 is an enlarged view showing a modified example of the hanging tab of the inner container according to the first embodiment. [Figure 9] 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] In this embodiment, the inner container 1 includes a cylindrical storage section 10 with a bottom having a bottom surface 11 and side surfaces 12, an upper flange 13 that projects outward (in the radial direction) from the upper end of the storage section 10, and two hanging tabs 14A and 14B that hang down from the outer edge of the upper flange 13. The storage section 10 stores the contents. Details of the hanging tabs 14A and 14B will be described later.

[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 the figure, 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 mouth portions 22A, 22B, and 22B and thin-walled mouth portions 23A and 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 alternately provided with multiple thick-walled mouth portions 22A, 22B and thin-walled mouth portions 23A, 23B, whose thickness from the circumferential surface changes in a stepped manner. Specifically, the thin-walled mouth portions 23A, 23B are rectangular regions of the mouth portion 21 that are partially recessed on the outside, extending from the upper end of the mouth portion 21 but not reaching the lower end. Therefore, the areas below the thin-walled mouth portions 23A, 23B in the mouth portion 21 are thick-walled mouth portions 22 that are the same thickness as the thick-walled mouth portions 22A, 22B.

[0020] In portions other than the lower end of the mouth portion 21, the mouth portion thick portions 22A, 22B are circumferentially longer than the mouth portion thin portions 23A, 23B. A circumferentially extending annular ridge 22P is provided around the entire outer circumference of the mouth portion 21 near the lower end. A threaded protrusion 24 is provided on the outer circumferential surface of the mouth portion thick portions 22A, 22B. In this embodiment, the threaded protrusion 24 is discontinued in the circumferential direction at the mouth portion thin portions 23A, 23B, but the lower annular ridge 22P is not discontinued in the circumferential direction and is provided below the mouth portion thin portions 23A, 23B. The threaded protrusion (spiral protrusion) 24 may be discontinued in the circumferential direction near the mouth portion thin 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 end 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 (female thread) 43 is provided on the inside of the peripheral wall 42.

[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(b), when the double container 3 is in the state shown, the depending tab 14 of the inner container 1 is 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 tab 14.

[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, which is in close contact with the underside of the top surface 41 of the cap 4, is sandwiched and engaged between the underside of the top surface 41 and the upper flange 13 of the inner container 1. When the cap 4 and the double container 3 are engaged with each other with the elastic packing 5 sandwiched between them, the contents will not leak even if the double container 3 is tilted or turned upside down.

[0027] 2, the direction in which cap 4 rotates relative to mouth 21 of outer container 2, loosening the screws and releasing the threaded engagement is defined as opening direction O. Note that in FIGS. 2 and 4, one thin-walled portion 23A and hanging tab 14A of double container 3 are visible, but the other thin-walled portion 23B and hanging tab 14B also have the same shape.

[0028] 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 side (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.

[0029] Additionally, an intermediate thickness region 26 that is thicker on the outer diameter side than the thin-walled portion 23A and thinner than the thick-walled portion 22B is provided below the retaining projection 25 in the outer container 2. The boundary between the intermediate thickness region 26 and the thin-walled portion 23A is located forward in the opening direction O (to the right in FIG. 4 ) of the tip of the retaining projection 25.

[0030] On the other hand, at the step (rear step) SR at the boundary between the thin-walled portion 23A of the outer container 2 and the thick-walled portion 22A located on the rear side in the opening direction O, the lower end of the thick-walled portion 22A forms an inclined edge 27 that is inclined so that it protrudes toward the front side in the opening direction O (toward the circumferential center of the thin-walled portion) as it goes downward.

[0031] 2 and 4, the hanging tab 14A 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, the front side edge (right side edge in FIG. 4) of the hanging tab 14A in the opening direction O, in the area facing the retaining protrusion 25 of the outer container 2, is a recessed recess 15.

[0032] In this configuration, the recess 15 of the hanging tab 14A is cut out in the shape of a horizontal right-angled trapezoid including the upper end, and the recess 15 is defined by a vertical end 15V corresponding to the upper base of the trapezoid extending downward from the upper end, and an inclined end 15I corresponding to the side edge of the trapezoid.

[0033] By forming such a recess 15, the lower side of the recess 15 of the hanging tab 14A becomes a lower extension portion 14LE that is long toward the front in the opening direction O, and in this configuration, the hanging tab 14A has a sock-like shape when viewed from the outside.

[0034] 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 extension portion 14LE of the hanging tab 14 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.

[0035] 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.

[0036] 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 14A tries to move toward the front step SF along the opening direction O (rotation direction).

[0037] However, in the configuration of the present invention, since an anti-slip protrusion 25 is provided at the mouth 21 of the outer container 2, even if a pulling force is applied to the hanging tabs 14A, 14B in the opening direction O due to the suction of the gasket 5, the vertical end 15V of the recess 15 of the hanging tab 14 comes into contact with the tip of the anti-slip protrusion 25, thereby preventing the inner container 1 from coming off the outer container 2.

[0038] Alternatively, even if a user grasps the hanging tabs 14A and 14B and lifts the double container 3, exerting a force pulling the inner container 1 including the hanging tab 14A upward, the inclined end 15I of the recess 15 of the hanging tab 14A comes into contact with the lower part of the anti-slip protrusion 25, thereby preventing the inner container 1 from coming off the outer container 2.

[0039] 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 14, a part of the recess 15 of the hanging tab 14 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.

[0040] 2 to 4 show an example in which two hanging tabs 14A, 14B are provided in the inner container 1, but the inner container 1 may have one or three or more hanging tabs 14. The number of thin-walled mouth portions 23 provided in the mouth 21 of the outer container 2 is the same as or greater than the number of hanging tabs 14, and when there are multiple hanging tabs 14 and more thin-walled mouth portions 23 than hanging tabs 14, the number of thin-walled mouth portions 23 provided is a multiple of the number of thin-walled mouth portions 23.

[0041] The inner container 1 is preferably made of, for example, metal or metal-coated resin, which can provide 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 that constitutes or is 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.).

[0042] 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.

[0043] 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 resin such as polypropylene (PP), polyethylene (PE), acrylonitrile butadiene styrene (ABS), polybutylene terephthalate (PBT), polyacetal (POM), polyethylene terephthalate (PET), or a biodegradable resin. Alternatively, the paper that constitutes the inner container 1 may be, for example, a laminate with a paper base material.

[0044] 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.

[0045] 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 made of foam packing made of, for example, elastic rubber, resin (e.g., PP, PE, PET), or aluminum film.

[0046] 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.

[0047] 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.

[0048] 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.

[0049] 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 14A in the opening direction O of the rotational direction (counterclockwise, left rotation) due to the suction of the gasket 5 in order to open the cap 4, a part of the recess 15 of the hanging tab 14A 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.

[0050] However, when removing the inner container 1 from the outer container 2 to replace the refill, as shown in Figure 4, the user holds the outer container 2 in place with one hand and pulls the inner container 1 upward with the other, causing the inclined surface at the tip of the retaining projection 25 of the outer container 2 to come into contact with the upper inclined end 15I of the lower extension 14LE of the inner container 1, causing the inner container 1 to rotate clockwise and disengage. The movement of the hanging tab 14 of the inner container 1 relative to the outer container 2 is described below.

[0051] (Movement of the hanging tab when the inner container is attached) Here, the movement of the hanging tab 14 when the inner container 1 is attached will be described with reference to Figure 5. Figure 5 is an explanatory diagram showing the movement of the hanging tab 14 relative to the opening 21 of the outer container 2 when the inner container 1 of the first embodiment is attached.

[0052] When attaching the inner container 1 to the outer container 2, the hanging tab 14A 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)).

[0053] Then, due to gravity, the rear side edge of the hanging tab 14 of the inner container 1 in the opening direction O moves downward relative to the outer container 2 so that it follows the step SR at the boundary between the thin-walled portion 23A of the outer container 2 and the thick-walled portion 22A.

[0054] Then, when the lower corner LC of the rear side edge of the hanging tab 14 in the opening direction O reaches the inclined edge 27 at the lower end of the step SR, the lower corner LC of the hanging tab 14 comes into contact with the inclined edge 27, and the hanging tab 14A slides diagonally downward, rotating in a direction that also fixes the inner container 1 to the outer container 2, i.e., clockwise (right rotation) (Figure 5(b)).

[0055] Then, due to gravity, the downward-moving tab 14A is guided by the inclined edge 27, and the lower extension 14LE below the recess 15 of the downward-moving tab 14 is guided below the retaining projection 25 of the outer container 2, and the lower extension 14LE comes into contact with the end of the intermediate-thickness region 26 and stops. Then, when the user further presses the inner container 1 downward or tightens the cap 4, a downward force is applied to the inner container 1, and the lower extension 14LE of the downward-moving tab 14A rides up onto the intermediate-thickness region 26, and the vertical end 15V of the recess 15 comes into contact with the tip of the retaining projection 25 and stops, thereby achieving an engaged state (FIG. 5(c)).

[0056] Here, recess 15 of depending tab 14A is cut out into a horizontally facing right-angled trapezoidal shape including the upper end. Preferably, the inclination of inclined edge 27 of outer container 2 and the inclination of inclined end 15I of depending tab 14A, which corresponds to the trapezoidal side of recess 15, are parallel. This parallel relationship allows recess 15 to prevent the upper end of depending tab 14A from hitting retaining protrusion 25 when depending tab 14A slides over inclined edge 27 during the process of setting inner container 1 into outer container 2. Meanwhile, when removing inner container 1 from outer container 2, inclined end 15I of depending tab 14A slides over retaining protrusion 25 to remove it, but the parallel inclined edge 27 prevents the lower end of depending tab 14A from hitting it.

[0057] In this way, in the configuration of the present invention, engagement occurs while sliding in the circumferential direction, and the depending tab does not climb over the protrusion of the outer container in the radial direction during engagement, etc. Therefore, even if the outer container is made of a material that is difficult to deform, such as glass, the mechanism involved in engagement will not be damaged by engagement or disengagement with the inner container.

[0058] If the inner container 1 is made of metal and the outer container 2 is made of glass, there is almost no deformation of the depending tab 14A and the opening 21 when the depending tab 14A is attached to or detached from the thin-walled portion 23A during refill replacement, etc. Therefore, the upper end of the thin-walled portion 23A of the outer container 2 is formed wider than the lower end of the depending tab 14A so that it can be attached and detached without deformation. Furthermore, because the attachment and detachment of the depending tab 14A do not require deformation, the inner container 1 can be formed thin, for example, with a thickness of 0.2 mm to 2.3 mm, more preferably 0.3 mm to 1.2 mm.

[0059] Fig. 6 is an enlarged perspective cross-sectional view passing through the lower extension 14LE of the hanging tab 14A of the double container 3. Fig. 6 corresponds to a part of the CC' cross section in the state of Fig. 5(c).

[0060] 6, in the mouth portion 21 of the outer container 2, the intermediate-thickness region 26 transitions gradually from the boundary with the thin-walled portion 23. That is, the boundary between the intermediate-thickness region 26 and the thin-walled portion 23A changes in thickness gradually while curving outward in cross-sectional view.

[0061] As a result, when the state changes from Figure 5(b) to Figure 5(c), the lower extension portion 14LE, which is the end portion on the front end side of the hanging tab 14 in the opening direction O, rides up onto the intermediate thickness region 26, but no impact is generated due to the ride-up.

[0062] 6, the cross section of the hanging tab 14 is curved along the outer peripheral surface of the thin-walled portion 23A of the outer container 2. In the engaged double container 3, the lower extension 14LE of the hanging tab 14 rides up onto the intermediate thickness region 26, thereby making surface contact therewith.

[0063] In this way, the lower extension portion 14LE rides up onto the intermediate thickness region 26, thereby making surface contact, so even if the outer container 2 is made of glass and manufacturing variations occur, rattling of the inner container 1 can be prevented when they are engaged to form the double container 3.

[0064] Furthermore, when the double container 3 is engaged, even if a force is applied to pull the hanging tab 14A in the opening direction O due to the suction of the gasket 5, the movement of the hanging tab 14 relative to the outer container 2 is restricted by friction caused by surface contact due to riding up, and engagement rattle can also be restricted.

[0065] As described above, if the lower extension 14LE below the recess 15 of the depending tab 14 is positioned below the retaining projection 25, even if a pulling force is applied to the depending tab 14A in the opening direction O of the rotational direction when the cap 4 is opened, the outer container 2 and the inner container 1 will not be disengaged. Furthermore, even if a force is applied to pull the inner container 1 upward for some reason, the lower extension 14LE will abut against the retaining projection 25, so the inner container 1 will not come off from the outer container 2.

[0066] In this way, as long as the lower extending portion 14LE is positioned below the retaining projection 25 of the outer container 2, it is possible to prevent disengagement between the outer container 2 and the inner container 1. Therefore, it is not necessary to highly precisely define the dimensions of the lower extending portion 14LE and the space in which the lower extending portion 14LE can be positioned below the retaining projection 25 of the outer container 2. For example, even if the height (depth) dimension of the lower extending portion 14LE is reduced to make the lower extending portion 14LE slender, and a gap is formed between the retaining projection 25 and the lower extending portion 14LE, it is still possible to prevent disengagement between the outer container 2 and the inner container 1.

[0067] <Modification 1 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.

[0068] FIG. 7 is an enlarged view showing a modified example of the retaining protrusion of the outer container according to the first embodiment.

[0069] In the configuration shown in Figure 7(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. In this configuration, the intermediate-thickness region 26α below the retaining projection 25α is vertically shortened. When the retaining projection 25α is provided as in Figure 7(a), although not shown, it is preferable that the vertical end 15V of the recess 15 of the depending tab 14 of the inner container 1 is longer than in the configuration of Figure 4, and the vertical length of the lower extension 14LE is shorter.

[0070] In the configuration shown in Figure 7(b), the retaining projection 25β ​​of the outer container 2β extends at an angle from the upper end of the thick-walled portion 22Bβ. In this configuration, the intermediate-thickness region 26β below the retaining projection 25β ​​is shortened in the vertical direction. Furthermore, although not shown, when the retaining projection 25β ​​is provided as in Figure 7(b), it is preferable that the recess 15 of the depending tab 14 of the inner container 1 is deeper than in the configuration of Figure 4, that both the vertical end 15V and the inclined end 15I are longer, and that the vertical length of the lower extension 14LE is shorter.

[0071] In the first modification shown in Figures 7(a) and (b), the space below the retaining protrusion 25 is narrow, although this is a schematic diagram. However, even in this case, by making the lower extension portion 14LE narrow in height and slimming it, the lower extension portion 14LE can be positioned in the space below the retaining protrusion 25. Note that in Figures 7(a) and (b), the lower space can also be made wider as shown schematically in Figure 5.

[0072] <Modification 2 of First Embodiment (Dangling Tab)> Fig. 8 is an enlarged view showing a modified example of the hanging tab of the inner container according to the first embodiment. As shown in Fig. 8, the hanging tab 14Aγ may be provided with an opening 16. The other shapes are the same as those in Fig. 2.

[0073] Second Embodiment 9 is a perspective view of the double container according to the second embodiment. Below, the same components as those in the second embodiment are given the same reference numerals, and the description thereof will be omitted.

[0074] In this embodiment, the thin-walled portion 23C of the outer container 2δ is provided with retaining protrusions 25 and 28 and intermediate thickness regions 26δ and 29 at both ends in the circumferential direction.

[0075] In detail, the second anti-slip protrusion 28 is formed by the upper end of the thick-walled portion 22C protruding to the front side in the opening direction O at the step at the boundary between the thin-walled portion 23C of the outer container 2δ and the thick-walled portion 22C located on the rear side in the opening direction O.

[0076] Furthermore, in this embodiment, a second intermediate thickness region 29 is provided below second retaining projection 28. The second intermediate thickness region 29 is thicker radially outward than thin portion 23C and thinner than thick portion 22C. The boundary between second intermediate thickness region 29 and thin portion 23C is located closer to the center in the circumferential direction (to the right in FIG. 9 ) than the tip of second retaining projection 28. The boundary between second intermediate thickness region 29 and thin portion 23C gradually changes in thickness while curving outward in cross section.

[0077] 2, the boundary between the intermediate thickness region 26δ provided below the retaining projection 25 in this embodiment and the thin-walled portion 23C is located closer to the center in the circumferential direction (the left side in FIG. 9) than the tip of the retaining projection 25. The boundary between the second intermediate thickness region 29 and the thin-walled portion 23C has a thickness that changes gradually while curving outward in cross section.

[0078] On the other hand, the hanging tab 14C of the inner container 1δ has recesses 15 and 17 formed at both ends in the circumferential direction, and the portions below these recesses 15 and 17 form lower extensions 14LE and 14LE2.

[0079] Specifically, the second recess 17 formed on the front edge of the hanging tab 14C of the inner container 1δ in the opening direction O is cut out in the shape of a horizontal right-angled trapezoid including the upper end, and the second recess 17 is defined by a vertical end 17V and an inclined end 17I extending downward from the upper end. Therefore, in the configuration shown in Fig. 9, the hanging tab 14C has a symmetrical shape. Note that in the hanging tab 14C, the recess 15 and the second recess 17 may be different sizes.

[0080] By forming such recesses 15 and 17, in the hanging tab 14C, the lower side of recess 15 becomes a lower extension portion 14LE that is long toward the front side in the opening direction O, and the lower side of recess 17 becomes a lower extension portion 14LE2 that is long toward the rear side in the opening direction O.

[0081] In this embodiment, too, the outer container 2δ is provided with an anti-slip protrusion 25, so that even if, when the cap 4 is opened, the adsorption of the gasket 5 causes a force to pull the hanging tab 14C in the opening direction O, causing the inner container 1 to rotate together, the lower extension portion 14LE rides up onto the intermediate thickness region 26δ side, fixing the hanging tab 14C, thereby preventing the inner container 1δ from coming off the outer container 2δ.

[0082] Furthermore, since the second anti-slip protrusion 28 is provided, even if, when tightening the cap 4, the suction of the gasket 5 causes a pulling force in the closing direction of the hanging tab 14C, causing the inner container 1 to rotate together, the lower extension portion 14LE2 moves toward the second intermediate thickness region 29, fixing the hanging tab 14C, thereby preventing the inner container 1δ from coming off the outer container 2δ.

[0083] In this embodiment, a portion of the lower extension portions 14LE, 14LE2, which are both circumferential ends of the hanging tab 14C, rides up onto intermediate thickness regions 26δ, 29, which are provided on both circumferential sides of the thin-walled portion 23C and whose thickness gradually changes from the center, thereby making surface contact.

[0084] In this way, the surface contact caused by the lower extension portions 14LE and 14LE2 riding up onto the intermediate thickness regions 26δ and 29 prevents rattling of the inner container 1δ when the outer container 2δ is formed from glass and is in the engaged double container 3δ state, even if manufacturing variations occur.

[0085] In this embodiment, when assembling the double container 3δ, the inner container 1δ is pressed downward, and the lower extensions 14LE, 14LE2 of the depending tab 14C of the inner container ride up onto the intermediate thickness regions 26δ, 29 before being fitted into the outer container 2δ. Therefore, the depending tab 14C does not ride over the protrusions of the outer container during radial engagement. Therefore, even if the outer container is made of glass that is difficult to deform, the mechanisms involved in engagement with and disengagement from the inner container will not be damaged.

[0086] In this embodiment, the upper ends of retaining projections 25, 28 are provided so as to be connected to the upper ends of thick portions 22D, 22C on the same straight line, but retaining projections 25, 28 may be configured as shown in Figures 7(A) and 7(b). Also, in depending tab 14C, opening 16 may be provided at a position more central than recesses 15, 17, as shown in Figure 8.

[0087] 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]

[0088] 1, 1γ, 1δ inner container 2, 2α, 2β, 2δ outer container 3, 3γ, 3δ double container 4 Cap 5. Packing 10 Storage section 11 Bottom 12 Side 13 Upper flange 14A, 14B, 14Aγ, 14C Hanging tab (hanging piece) 14LE, 14LE2 lower extension 15 recess 15I Slanted end 15V vertical end 16 Opening 17 Recess 17I Inclined end 17V vertical end 20 Case part 201 Bottom wall 222 Side wall 203 Shoulder 21, 21α, 21β, 21γ, 21δ Mouth 22, 22A, 22B, 22C, 22D Mouth thick wall part (thick wall part) 22P Annular ridge 23A, 23B, 23Aα, 23Aβ, 23C, 23D Mouth thin wall part (thin wall part) 25, 25α, 25β Anti-slip protrusion 26 Intermediate Thickness Region 27 Beveled edge 28 Second retaining protrusion 29 Second intermediate thickness region LC bottom corner SF step (front step) SR step (rear step) LC bottom corner

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 surface 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 the radial direction from the inner surface, and a 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 recess formed at or near the upper end of the inner container at a front side edge of the hanging tab in the opening direction, the recess being recessed at or near the upper end, and a lower extending portion extending forward below the recess; When the inner container is attached to the outer container, at least a part of the lower extension of the hanging tab is located below the retaining protrusion. double container.

2. At a step at the boundary between the thin-walled portion and the thick-walled portion located on the rear side in the opening direction, a lower end of the thick-walled portion forms an inclined edge that is inclined so as to protrude toward the front side of the thin-walled portion in the opening direction as it goes downward, The upper end of the thinned portion is wider than the lower end of the depending tab; When the inner container is attached to the outer container, by placing the inner container on the opening of the outer container, the lower corner of the rear side edge of the hanging tab of the inner container in the opening direction comes into contact with the inclined edge, and the hanging tab slides obliquely downward, and the lower extension of the hanging tab is guided under the stopper protrusion. The double container according to claim 1.

3. an intermediate thickness region that is thicker on the outer diameter side than the thin-walled portion and thinner than the thick-walled portion is provided below the retaining protrusion of the outer container; a boundary portion of the intermediate thickness region with the thin-walled portion is located closer to the front end in the opening direction than the tip of the retaining projection, and the thickness of the boundary portion changes gradually; When the inner container is attached to the outer container, at least a portion of the lower extension of the hanging tab is in surface contact with the intermediate thickness region. The double container according to claim 1.

4. The recess of the hanging tab is cut out in a horizontal right-angled trapezoid shape including an upper end, The inclination of the inclined edge of the outer container and the inclination of the inclined end of the recess of the hanging tab corresponding to the side of the right-angled trapezoid are parallel. The double container according to claim 2.

5. 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 surface 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 the radial direction from the inner surface, and a 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, an intermediate thickness region that is thicker on an outer diameter side than the thin wall portion and thinner than the thick wall portion is provided in at least a lower portion of each of both ends in the circumferential direction of the thin wall portion, The thickness of the intermediate thickness region at the boundary with the thin-walled portion changes gradually, a recess formed at or near the upper end of each of the two circumferential ends of the hanging tab of the inner container, the recess being a lower extension extending outwardly below the recess; When the inner container is attached to the outer container, at least a portion of the lower extensions at both ends in the circumferential direction of the hanging tab are in surface contact with the intermediate thickness region. double container.

6. a retaining protrusion is formed by a part of the thick-walled portion near the upper end protruding rearward in the opening direction at a step between the thin-walled portion of the outer container and the thick-walled portion at both ends in the circumferential direction, The boundary between the intermediate thickness region and the thin-walled portion is located closer to the center in the circumferential direction than the tip of the retaining projection. The double container according to claim 5.

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

8. The inner container is made of metal. The double container according to claim 1.

9. A double container according to any one of claims 1 to 8; a cap having an internal thread that can be threadably engaged with the mouth of the outer container; Double container with cap.

10. A sealant is provided on the underside of the top surface of the cap. The double container with a cap according to claim 9.

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