JP2013095496A - Double container, outer container, and inner container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a double container enabling protection of an inner container and improvement of operability during replacement of the inner container.SOLUTION: The double container includes an outer container 10 and the inner container 30 fitted to/detached from the inside of the outer container 10. The outer container 10 includes: an outer container body 11 covering 50% or more and 70% or less of the surface of the inner container 30 in the fitted state; a first engagement part 13 arranged in the outer container body 11; and a fitting opening part 14 formed on a side wall part 11a of the outer container body 11 and to/from which the inner container 30 is fitted/detached. The inner container 30 includes a second engagement part 40 engaged with the first engagement part 13, and by engagement of the first engagement part 13 with the second engagement part 40, the inner container 30 is held by the outer container 10.

Description

  The present invention relates to a double container, an outer container, and an inner container.

  In general, a double container is known in which an inner container can be stored inside an outer container. Since this double container can exchange the inner container with respect to the outer container, the outer container can be reused. Therefore, it is only necessary to improve the appearance with respect to the outer container seen from the outside, and the inner container housed therein becomes the refill container to be discarded. For this reason, the inner container can reduce the amount of the container and can reduce the load on the global environment.

  Here, as an example of the double container, a dispenser container that can discharge the contents in a fixed amount will be described as an example. Many conventional double-container-type dispenser containers have a structure in which when a dispenser (quantitative discharge pump) is attached to an outer container by screwing, the inner container is also fixed to the outer container by this screwing force (see Patent Document 1). .

  When exchanging the inner container in this dispenser container, the dispenser is first turned to remove the dispenser from the outer container. As a result, the inner container is also removable from the outer container, and the used inner container is removed from the outer container and discarded. Subsequently, the new inner container is positioned at the mounting position of the outer container, and the dispenser is screwed to the outer container while maintaining this state. As described above, the replacement process of the inner container with respect to the outer container has been performed.

JP 2008-189315 A

  By the way, as for the conventional double container, as a method of attaching the inner container to the outer container, it is inserted and attached from the top of the outer container as in Patent Document 1, or an opening is formed in the bottom of the outer container. The method of inserting and mounting from under the outer container has been adopted. However, this conventional mounting method has a problem that the mounting operation of the inner container is troublesome when the contents of the inner container are heavy, such as shampoo.

  This invention is made | formed in view of said point, and it aims at providing the double container, the outer container, and the inner container which aimed at the improvement of operativity at the time of replacement | exchange.

From the first point of view, the above problem is
In a double container having an outer container and an inner container attached to and detached from the outer container,
The outer container is formed so as to open laterally on the rear surface of the container main body, a first engaging portion provided on the upper portion of the container main body, and the inner side of the container main body. Having an opening,
The inner container can be solved by a double container characterized by having a second type rear portion for positioning with respect to the outer container by engaging with the first engaging portion.

In addition, the above problem is from the second point of view.
An outer container in which an inner container is attached and detached,
An outer container body,
A first engagement portion that engages with a second engagement portion formed in the inner container;
This can be solved by an outer container having an opening formed in the outer container body so as to open to the side and to which the inner container is attached and detached.

In addition, the above problem is from the third viewpoint,
An inner container that is attached to and detached from the outer container,
Forming a large diameter portion and a small diameter portion smaller than the large diameter portion in the inner container body;
Contents in which the large-diameter portion is held by the outer container by engaging with a part of the outer container during the mounting of the inner container body to the outer container. It can be solved by a vessel.

  According to the disclosed invention, since the outer container covers the inner container over a wide area, the inner container can be reliably protected by the outer container. In addition, since the inner container can be attached / detached through the opening formed in the side wall portion of the outer container, the attaching / detaching process of the inner container with respect to the outer container can be easily performed.

FIG. 1 is an overall view of a double container according to an embodiment of the present invention, (A) is a plan view, (B) is a front view, (C) is a bottom view, (D) is a right side view, E) is a rear view. 2A and 2B are perspective views of an outer container constituting a double container according to an embodiment of the present invention. FIG. 2A is a perspective view seen from the front, and FIG. 2B is a perspective view seen from the back. FIG. 3 is a view showing an outer container constituting a double container according to an embodiment of the present invention, wherein (A) is a plan view, (B) is a front view, (C) is a left side view, and (D). FIG. 4A and 4B are diagrams showing an inner container constituting a double container according to an embodiment of the present invention, wherein FIG. 4A is a plan view, FIG. 4B is a front view, FIG. 4C is a bottom view, and FIG. It is a left side view. FIG. 5 is a view showing an inner container constituting a double container according to an embodiment of the present invention, wherein (A) is a cross-sectional view of the neck and (B) is a vertical cross-sectional view of the neck. FIG. 6 is a view for explaining the operation of mounting the inner container to the outer container (No. 1). FIG. 7 is a view for explaining the operation of mounting the inner container to the outer container (No. 2). FIG. 8 is a view for explaining the operation of mounting the inner container to the outer container (No. 3). FIG. 9 is a view for explaining the operation of mounting the inner container to the outer container (No. 4). FIG. 10 is a cross-sectional view showing a state where the inner container is mounted on the outer container.

  Next, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 shows a double container 1 according to an embodiment of the present invention. The double container 1 includes an outer container 10 and an inner container 30. The inner container 30 is mounted inside the outer container 10, and the inner container 30 is held by the outer container 10 in this mounted state.

  In this embodiment, the example which applied the double container 1 to the shampoo container is shown. For this reason, a dispenser 50 is attached to the neck 32 of the inner container 30. This double container 1 is used in a state where it is placed on a bathroom, a washstand or the like. However, the application of the double container 1 according to the present invention is not limited to a shampoo container, and can be applied to various containers in which the internal space is replaced as a refill with respect to the outer container.

  Next, the outer container 10 and the inner container 30 constituting the double container 1 will be described.

  First, the outer container 10 will be described. 2 and 3 are diagrams for explaining the outer container 10. FIG. 2 is a perspective view of the outer container 10, and FIG. 3 shows a plane, a front surface, a side surface, and a rear surface of the outer container 10, respectively.

  The outer container 10 is formed of a hard resin. However, the material of the outer container 10 is not limited to resin, and other materials such as metal and ceramic can be used. The outer container 10 has an outer container main body 11, a mounting recess 12, a first engaging portion 13, a mounting opening 14, an extension portion 15, a rotation preventing cutout 16, a bottom 18 and the like. It is configured.

  The outer container body 11 has a function of storing and holding an inner container 30 to be described later. The outer container body 11 can be formed in an arbitrary shape on condition that the inner container 30 is accommodated therein. Therefore, it can be made a shape rich in design.

  In the present embodiment, the outer container body 11 is configured to hold the inner container 30 mounted therein in a suspended state. For this reason, the outer container main body 11 is provided with a first engaging portion 13 for holding the inner container 30 in a suspended state.

  The first engagement portion 13 is formed on the top plate portion 17 of the outer container body 11. As shown in FIG. 3A, the top plate portion 17 of the outer container body 11 is formed with a U-shaped mounting recess 12 into which the neck portion 32 of the inner container 30 is inserted. The outer peripheral edge portion of the mounting recess 12 becomes the first engagement portion 13.

  Further, a rotation preventing notch 16 is formed at the center position of the first engaging portion 13. The anti-rotation notch 16 is a rectangular notch, and when the inner container 30 is mounted on the outer container 10, the anti-rotation protrusion 45 (see FIG. 5) formed on the inner container 30 is engaged. Configured to match.

  As shown in FIGS. 2B and 3D, the mounting opening 14 is formed on the back surface of the outer container body 11 so as to open sideways. The inner container 30 is attached to and detached from the inner space 20 formed inside the outer container main body 11 through the attachment opening 14. That is, the double container 1 according to the present embodiment is configured such that the inner container 30 is attached to and detached from the side portion of the outer container 10.

  The internal space 20 formed in the outer container 10 corresponds to the shape of the inner container 30 described later, and the upper internal space 20A formed in the upper part has a larger volume than the lower internal space 20B formed in the lower part. It is made into the shape which has.

  The extending portion 15 is formed inward from the side wall portion 11 a sandwiching the mounting opening 14 of the outer container main body 11. In other words, the extending portion 15 is formed so as to extend into the mounting opening 14 from the side wall portion 11a.

  By forming the extended portion 15, the shape of the mounting opening portion 14 is substantially a bowl shape as a whole. Specifically, as shown in FIGS. 2B and 3D, a large-diameter curved portion 14a exists at the uppermost portion, and an extended portion 15 extending inward exists at the lower portion. In the lower part, the same width portion 14b having the same width (the dimension indicated by the arrow W3 in FIG. 3D) is present.

  Further, a predetermined position (a part on the upper side) of the extending portion 15 is engaged with a boundary portion 36 of the inner container 30 to be described later, and becomes a guide portion 21 that guides the mounting of the inner container 30 to the outer container 10. What is indicated by an arrow W2 in FIG. 3D is the width dimension between the pair of left and right guide portions 21.

  The bottom 18 is disposed at the lower part of the outer container body 11. The outer container body 11 has a bowl shape, and enhances stability when the outer container 10 is placed. Further, a hook portion 23 is formed at a position facing the mounting opening 14 of the bottom 18 (see FIGS. 2B and 3D). The hook 23 is configured such that the lower portion of the inner container 30 is engaged when the inner container 30 is mounted on the outer container 10.

  Next, the inner container 30 will be described with reference to FIGS. 4 and 5.

  FIG. 4 shows a plane, a front surface, a bottom surface, and a side surface of the inner container 30. FIG. 5 shows a longitudinal section and a transverse section of the neck 32 of the inner container 30.

  The inner container 30 is a refill container, and is removed from the outer container 10 and discarded when use of the contents (shampoo in this embodiment) is completed. In this embodiment, since the shampoo is used as the contents, the volume of the inner container 30 is set in the range of 50 ml to 10000 ml.

  When the inner container 30 having this volume is loaded with shampoo, the weight is 50 g to 10,000 g. Thus, since the inner container 30 filled with the contents becomes considerably heavy, the conventional method of mounting the inner container with respect to the outer container from above or from below is troublesome to replace the inner container with respect to the outer container. As described above.

  The inner container 30 is configured to include an inner container body 31, a neck 32, a second engaging portion 40, a rotation preventing projection 45, and the like.

  The inner container body 31 and the neck portion 32 are integrally formed of resin. In the inner container 30, the thickness of the inner container body 31 is set as thin as possible within a range in which a predetermined strength can be maintained, except for a neck portion 32 that requires strength. Specifically, in this embodiment, the thickness is about 0.2 mm.

  This is set from the aspect of reducing the amount of discarded as much as possible in order to protect the global environment and reduce the load. In order to achieve the same object, the material of the inner container 30 may be a plant-derived plastic or biodegradable plastic.

  The inner container body 31 is configured such that a large diameter portion 33, a small diameter portion 34, and a bottom portion 35 are integrally formed. The large-diameter portion 33 has a large-diameter portion upper portion 33a that gradually increases in diameter as it goes downward from the neck portion 32, a large-diameter portion lower portion 33b that gradually decreases in diameter as it goes downward, and the large-diameter portion upper portion 33a and the large-diameter It is comprised by the boundary part 36 formed in the boundary part of the part lower part 33b.

  At the position where the large diameter portion upper portion 33a and the large diameter portion lower portion 33b are in contact, the diameter of the large diameter portion 33 is the maximum. The diameter (maximum diameter) at this time is indicated by an arrow L2 in FIG.

  The boundary portion 36 is formed at a position where the large diameter portion upper portion 33a and the large diameter portion lower portion 33b are in contact with each other. The boundary portion 36 is an inclined surface inclined inward.

  The small diameter portion 34 is provided below the large diameter portion 33. The small diameter portion 34 is a cylindrical portion having the same diameter (indicated by an arrow L3 in FIG. 4B). The bottom portion 35 is provided below the small diameter portion 34. The bottom portion 35 has a substantially hemispherical shape.

  As described above, the large-diameter portion 33, the small-diameter portion 34, and the bottom portion 35 constituting the inner container main body 31 are set to be as thin as about 0.2 mm. For this reason, the rigidity of the inner container body 31 itself is lower than that of the outer container 10, and the strength is also weaker than that of the outer container 10.

  The neck portion 32 is integrally formed on the upper portion of the inner container main body 31. The thickness of the neck 32 is set to be thicker than the thickness of the inner container body 31. Therefore, the neck 32 has a predetermined strength, and there is no inconvenience when the neck 32 is held in the outer container 10 to be described later or when the dispenser 50 is attached.

  The neck portion 32 includes a screw portion 37, a second engagement portion 40, a rotation prevention protrusion 45, and the like. The threaded portion 37 is formed on the outer periphery of the neck portion 32. The dispenser 50 and a cap 39 to be described later are attached to the inner container 30 by being screwed onto the screw portion 37.

  The second engaging portion 40 is formed away from the upper surface portion 41 of the inner container main body 31. The second engaging portion 40 has a bowl-like shape having a circular shape in plan view. The diameter L1 (shown in FIG. 4 (A)) of the second engaging portion 40 is the diameter W1 of the mounting recess 12 formed in the top plate portion 17 of the outer container 10 (see FIG. 3 (A)). (L1> W1).

  Further, the separation distance of the gap portion 42 formed between the upper surface portion 41 and the second engagement portion 40 is set to be approximately equal to the thickness of the first engagement portion 13. Specifically, the gap distance of the gap portion 42 is such that when the first engagement portion 13 is inserted into the gap portion 42 as described later, the first engagement portion 13 is the second engagement portion 40. And the upper surface portion 41 are set so as to be sandwiched.

  Further, as shown in FIGS. 5A and 5B, a rotation preventing projection 45 is formed inside the gap portion 42 of the neck portion 32. The rotation prevention protrusion 45 is a rectangular protrusion and is configured to protrude outward from the neck portion 32. Further, the rotation prevention protrusion 45 has a shape that engages with the rotation prevention notch portion 16 formed in the first engagement portion 13 described above.

  Further, a positioning mark 43 is formed at a position corresponding to the rotation preventing protrusion 45 of the second engaging portion 40 (see FIG. 4A). Therefore, even if the rotation preventing protrusion 45 is formed at the lower part of the hook-shaped second engaging part 40, the user of the double container 1 (inner container 30) can move the upper part of the second engaging part 40. Thus, the position of the rotation preventing projection 45 can be recognized.

  Next, the operation | movement which mounts the inner container 30 with respect to the outer container 10 in the double container 1 set as the said structure is demonstrated. 6 to 9 show an operation of mounting the inner container 30 to the outer container 10.

  A cap 39 is attached to the neck 32 of the inner container 30. In order to attach the inner container 30 to the outer container 10, the operator who performs the attaching process first tilts the inner container 30 with respect to the outer container 10 as shown in FIG. 6. Then, the small diameter portion 34 and the bottom portion 35 of the inner container 30 are inserted into the mounting opening 14 of the outer container 10. As a result, the small diameter portion 34 and a part of the bottom portion 35 are inserted into the same width portion 14 b located at the lower portion of the mounting opening 14, and thus inserted into the lower internal space 20 </ b> B formed inside the outer container 10. Is done.

  At this time, the width dimension W3 (shown in FIG. 3D) of the same width portion 14b of the mounting opening 14 is set larger than the diameter L3 (see FIG. 5B) of the small diameter portion 34 (see FIG. 5B). W3> L3). Therefore, even when the extending portion 15 is formed to extend into the mounting opening 14, the mounting opening 14 becomes an obstacle when the small-diameter portion 34 and the bottom 35 are inserted into the mounting opening 14. There is no such thing as.

  Next, as shown in FIG. 7, the operator hooks the bottom portion 35 on the hook portion 23 formed on the bottom portion 18 of the outer container 10. Then, the inner container 30 is rotated in the direction of arrow A (the direction toward the outer container 10) in the drawing around the hook portion 23. By this operation, the large diameter portion 33 is inserted into the upper internal space 20 </ b> A formed in the outer container 10 through the curved portion 14 a formed in the mounting opening 14.

  At this time, the maximum diameter L2 of the large-diameter portion 33 is set to be slightly larger than the width dimension W2 between the pair of guide portions 21 (L2> W2). Therefore, the large diameter portion 33 engages with the guide portion 21 during the mounting of mounting the large diameter portion 33 in the upper internal space 20A.

  Specifically, the boundary portion 36 formed at the maximum diameter position of the large diameter portion 33 is engaged with the guide portion 21. As a result, the large-diameter portion 33 is in a state of riding on the extension portion 15, and the inner container 30 is held in the extension portion 15.

  Therefore, after the boundary portion 36 is engaged with the guide portion 21, the weight of the inner container 30 is received by the boundary portion 36 (extension portion 15), so that the operator needs to hold the heavy inner container 30 by hand. Disappear. Thus, in the subsequent mounting process, the operator only needs to slide the inner container 30 in the direction of arrow A, so that the mounting process of the inner container 30 to the outer container 10 can be easily performed.

  When the operator further urges the inner container 30 to rotate in the direction of arrow A, the inner container 30 is positioned at the engagement position between the hook portion 23 and the bottom portion 35 and the engagement position between the boundary portion 36 and the guide portion 21. While rotating in the direction of arrow A. Thereby, the neck portion 32 formed at the upper end portion of the inner container 30 is inserted into the mounting recess portion 12 formed in the top plate portion 17 of the outer container 10.

  As described above, the second engaging portion 40 is formed on the neck portion 32 of the inner container 30. Further, a gap portion 42 is formed between the upper surface portion 41 and the second engagement portion 40. Therefore, as shown in FIG. 8, the first engagement portion 13 relatively positioned on the outer peripheral edge of the mounting recess 12 is inserted into the gap 42 as the inner container 30 rotates in the direction of arrow A. go.

  As described above, the diameter L1 (see FIG. 4A) of the second engaging portion 40 is set larger than the diameter W1 (see FIG. 3A) of the mounting recess 12 (L1>). W1). Therefore, when the first engaging portion 13 is inserted into the gap portion 42, the first engaging portion 13 and the second engaging portion 40 are engaged.

  Further, by rotating the inner container 30 in the direction of arrow A, the second engaging portion 40 further moves in the direction of arrow A. Then, when the inner container 30 moves to a position immediately before the predetermined mounting position, the operator moves the positioning mark 43 (see FIG. 4A) formed on the second engaging portion 40 and the outer container 10. Positioning with the notch 16 for preventing rotation formed in the first engaging portion 13 (top plate portion 17).

  This positioning is performed by rotating the inner container 30 with respect to the outer container 10. At this time, since the first engaging portion 13 and the second engaging portion 40 are engaged as described above, the weight of the inner container 30 is the first and second engaging portions 13 and 40. Is received at the engagement position. For this reason, the positioning process of the inner container 30 can be easily performed.

  When the positioning of the rotation prevention notch 16 and the positioning mark 43 is completed, the operator further moves the inner container 30 in the arrow A direction. As a result, the rotation prevention protrusion 45 advances into the rotation prevention notch 16, and the rotation prevention protrusion 45 and the rotation prevention notch 16 are engaged.

  The rotation of the inner container 30 relative to the outer container 10 is restricted by the engagement of the rotation prevention protrusion 45 and the rotation prevention notch 16. Therefore, the process of removing the cap 39 from the inner container 30 and the process of attaching the dispenser 50 to the screw part 37 of the neck part 32 can be easily performed.

  By the above operation, the inner container 30 is mounted in the outer container 10 as shown in FIGS. According to the mounting operation described above, after the boundary portion 36 and the guide portion 21 are engaged, the weight of the inner container 30 is received at the engagement position between the boundary portion 36 and the guide portion 21. Even if it is heavy, the subsequent mounting operation can be easily performed.

  The positioning of the rotation prevention notch 16 and the rotation prevention protrusion 45 is also prevented by using a positioning mark 43 formed on the second engagement portion 40 that can be viewed from above by the operator. This can be easily performed by aligning with the notch 16 for use.

  Further, in the present embodiment, the inner container 30 is held in a state suspended from the outer container 10, and therefore, unlike the configuration in which the inner container 30 is placed, the shape of the bottom 35 is formed even if the inner container 30 is a thin walled container. Will not be deformed. For this reason, the content in the inner container 30 can be reliably discharged by the dispenser 50 to the end.

  Here, attention is paid to the outer container 10 and the inner container 30 in the mounted state.

  The double container 1 according to the present embodiment is configured to mount the inner container 30 from the side with respect to the mounting opening 14 formed on the side wall of the outer container 10. In this mounted state, in this embodiment, the outer container 10 is set to cover 50% or more and 70% or less of the surface of the inner container 30. In the present embodiment, the area of the mounting opening 14 is set to be 20% or more and 40% or less with respect to the surface area of the outer container 10.

  With this configuration, it is possible to reliably protect the inner container 30 by the outer container 10 while maintaining good operability during mounting / demounting. The reason will be described below.

  First, paying attention to the area of the mounting opening 14, when the area of the mounting opening 14 formed in the outer container 10 increases, the area where the inner container 30 is exposed to the outside increases accordingly. When the exposed area of the inner container 30 with respect to the outside increases, the possibility of damage to the inner container 30 due to the application of external force or the like increases.

  As described above, since the inner container 30 is finally discarded, the thickness of the inner container 30 is reduced in terms of reducing the load on the global environment. For this reason, the strength of the inner container 30 is weaker than that of the outer container 10 that is not discarded. Therefore, when the inner container 30 considering the global environment is used, the above problem becomes more serious.

  In order to prevent this, it is conceivable that the outer container wraps the entire inner container as in the prior art. However, in this configuration, although the inner container 30 can be protected, it is necessary to insert the inner container into the outer container from the upper part or the lower part, and the operation becomes troublesome particularly when the inner container 30 is heavy. This is as described above.

  The double container 1 according to the present embodiment improves the mounting workability by adopting a configuration in which the inner container 30 can be mounted on the outer container 10 from the side of the outer container 10 through the mounting opening 14. It is characterized in that the area of the mounting opening 14 is set to a minimum area that allows easy mounting work.

  In the experiment of the present inventor, if the area of the outer container 10 covering the inner container 30 (hereinafter referred to as “covered area”) is less than 50% of the surface of the inner container 30, damage to the inner container 30 due to application of external force or the like. Was found to occur frequently. On the contrary, if the covering area is more than 70% of the surface of the inner container 30, the area of the mounting opening 14 becomes relatively small, and the operation of mounting and removing the inner container 30 with respect to the outer container 10 is hindered. I understood.

  On the other hand, when the area of the mounting opening 14 is less than 20% with respect to the surface area of the outer container 10, it has been found that there is a problem in the mounting / demounting operation of the inner container 30 relative to the outer container 10. Further, it was found that when the area of the mounting opening 14 exceeds 40% of the surface area of the outer container 10, the strength of the outer container 10 is reduced, although the mounting / demounting property of the inner container 30 is improved. . In particular, it has been found that when the area of the mounting opening 14 exceeds 50% of the surface area of the outer container 10, the outer container 10 may be distorted depending on how the dispenser 50 is pressed.

  Therefore, according to the double container 1 which concerns on this embodiment, while being able to make the mounting property with respect to the outer container 10 of the inner container 30 favorable, it becomes possible to protect the inner container 30 reliably.

  The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the specific embodiments described above, and various modifications are possible within the scope of the gist of the present invention described in the claims. It can be modified and changed.

DESCRIPTION OF SYMBOLS 1 Double container 10 Outer container 11 Outer container main body 12 Mounting recessed part 13 1st engaging part 14 Mounting opening 15 Extension part 16 Notch part 20 for rotation prevention Internal space 20A Upper internal space 20B Lower internal space 21 Guide part 23 Hook part 30 Inner container 31 Inner container body 32 Neck part 33 Large diameter part 34 Small diameter part 35 Bottom part 36 Boundary part 37 Screw part 40 Second engagement part 42 Gap part 43 Positioning mark 45 Anti-rotation protrusion 50 dispenser

Claims (12)

In a double container having an outer container and an inner container attached to and detached from the outer container,
The outer container has an outer container main body, a first engaging portion provided in the outer container main body, and an opening formed to open to the outer container main body toward the side, and the inner container is attached to and detached from the outer container main body. And
The inner container has a second engagement portion that engages with the first engagement portion,
The double container characterized in that the inner container is held by the outer container by engaging the first engaging part and the second engaging part.   The double container according to claim 1, wherein the outer container body covers 50% or more and 70% or less of the surface of the inner container in a mounted state.   The double container according to claim 1 or 2, wherein an area of the opening is 20% or more and 40% or less with respect to a surface area of the outer container main body. The outer container has an extending portion that extends toward the inside of the opening from both sides of the formation position of the opening,
The inner container has a large diameter part and a small diameter part smaller than the large diameter part,
The inner container is held by the outer container by engaging the large-diameter portion with the extension part during the mounting of the inner container to the outer container. Item 4. The double container according to any one of Items 1 to 3. The first engagement portion has a first rotation prevention portion,
The second engaging portion includes a second anti-rotation portion that engages with the first anti-rotation portion in a mounted state and restricts rotation of the inner container relative to the outer container. Item 5. The double container according to any one of Items 1 to 4.   The double container according to any one of claims 1 to 5, wherein the inner container has a volume of 50 ml to 10,000 ml. An outer container in which an inner container is attached and detached,
An outer container body,
A first engagement portion that engages with a second engagement portion formed in the inner container;
An outer container, comprising: an opening formed on the outer container body so as to open toward a side, and the inner container is attached to and detached from the outer container.   The outer container according to claim 7, wherein the outer container body covers 50% to 70% of the surface of the inner container in a mounted state.   The outer container according to claim 7 or 8, wherein an area of the opening is 20% or more and 40% or less with respect to a surface area of the outer container main body.   The outer container according to any one of claims 7 to 9, wherein the outer container main body has an extending portion extending from both sides of the opening forming position toward the inside of the opening. An inner container that is attached to and detached from the outer container,
Forming a large diameter portion and a small diameter portion smaller than the large diameter portion in the inner container body;
Contents in which the large-diameter portion is held by the outer container by engaging with a part of the outer container during the mounting of the inner container body to the outer container. vessel.   The inner container according to claim 11, wherein the inner container has a volume of 50 ml to 10,000 ml.

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