Container

Abstract

The invention provides a container capable of suppressing cracking at the lower end of a protruding part. According to the present invention, a container is provided with a containing part and a protruding part, the bottom surface of the containing part is provided with a central part and a peripheral part surrounding the central part, the central part is configured to be recessed relative to the peripheral part and the bottom of the central part is suspended, and the protruding part is configured to protrude downward from the central part. The protruding part is provided with a bent part which is bent upwards in a region including the center of the lower end of the protruding part in the longitudinal direction.

Description

[0001] The present application is a divisional application of the Chinese Invention Patent Application with the application number 202310384812.X, the application date May 22, 2019, and the invention name “Container”.

[0002] The Chinese Invention Patent Application with the application number 202310384812.X is a divisional application of the original application with the application number “201980027279.3” and the invention name “Container” entered Chinese national stage from the PCT International Application with the international application date May 22, 2019. TECHNICAL FIELD

[0003] The present application relates to a container. BACKGROUND

[0004] (First Viewpoint) A container manufactured by direct blow molding using a tubular parison is known. For example, a layered peelable container having an outer shell and an inner bag and shrinking the inner bag as the content decreases is disclosed in Patent Document 1.

[0005] (Second Viewpoint) As Patent Document 2, various structures having a bottomed tubular trunk portion, a tubular shoulder portion connected to the trunk portion, and a cylindrical mouth portion connected to the shoulder portion on a container body of a layered peelable container are proposed. The container body of the layered peelable container is manufactured by a method of forming a parison mold into a tubular shape. An outer shell and an inner bag provided inside the outer shell are formed on the container body of the layered peelable container. The content is accommodated in the inner bag, and when the user compresses the layered peelable container to discharge the content of the inner bag, air enters the outer shell and the inner bag, and the inner bag peels from the inner surface of the outer shell.

[0006] (Third Viewpoint) A check valve is disclosed in Patent Document 3, which is configured to open and close a through-hole of a tubular body with a lid portion. The lid portion is connected to the body portion at a hinge portion, and the through-hole is opened and closed by rotating the lid portion at the hinge portion.

[0007] PRIOR ART DOCUMENT PATENT DOCUMENT Patent Document 1: Japanese Patent No. 3401519 Patent Document 2: Japanese Patent Application Publication No. 2016-117507 Patent Document 3: Japanese Patent Application Publication No. 2012-106800 SUMMARY PROBLEMS TO BE SOLVED BY THE INVENTION (First Viewpoint) A protrusion is formed at the bottom of the container when the fused deposition modeling type blank is set at one end, but when an impact such as a drop is applied, stress is concentrated in the central portion in the long side direction near the lower end of the protrusion, and thus there is a risk of cracking.

[0008] The present application was made in view of the above circumstances, and provides a stacked and peeled container that can suppress cracking of the lower end of the protrusion, particularly the central portion in the long side direction.

[0009] (Second Viewpoint) Since the mouth portion protrudes from the shoulder portion and the diameter of the mouth portion is smaller than that of the shoulder portion, there is a risk that the portion where the mouth portion is connected to the shoulder portion is deformed. For example, when an external force is applied to the mouth portion, there is a risk that the mouth portion is bent and retracted toward the shoulder portion. As the case where an external force is applied to the mouth portion, there are, for example, a case where an article is placed on the stacked and peeled container when the stacked and peeled container is carried, and a case where the stacked and peeled container falls and collides with the ground at the mouth portion.

[0010] The present application was made in view of the above circumstances, and provides a stacked and peeled container that can suppress bending and retraction of the mouth portion toward the shoulder portion.

[0011] (Third Viewpoint) The present inventors found that when the check valve of Patent Document 3 is used on the stacked and peeled container, there is a risk that the check valve does not work properly and that external air enters the inner bag after the contents are discharged.

[0012] The present application was made in view of the above circumstances, and provides a stacked and peeled container that can suppress entry of external air into the inner bag.

[0013] Technical Solution for Solving the Problem (First Viewpoint) According to the present application, there is provided a container including a housing portion and a protrusion. The bottom surface of the housing portion includes a central portion and a peripheral portion surrounding the central portion, the central portion is recessed with respect to the peripheral portion and the bottom is suspended, the protrusion is configured to protrude downward from the central portion, and the protrusion includes a bending portion that is bent upward in a region in the central portion in the long side direction including the lower end of the protrusion.

[0014] The present inventors found through intensive research that by bending the region in the central portion in the long side direction including the lower end of the protrusion upward, stress concentration on the central portion in the long side direction when an impact such as a drop is applied can be alleviated, and thus cracking can be suppressed.

[0015] Hereinafter, various embodiments of the present application will be described. The embodiments shown below can be combined with each other.

[0016] It is preferable that the lower end of the protrusion is located closer to the upper side than the ground-contacting surface of the peripheral portion.

[0017] The ratio of the distance from the top to the deepest recess of the recessed portion to the distance from the top of the bottom of the central portion that is most cantilevered to the ground surface is preferably 0.75 to 0.99.

[0018] The container is preferably configured to have an outer bag and an inner bag, and the inner bag contracts as the contents decrease.

[0019] The outer layer that configures the outer bag and the inner layer that configures the inner bag are preferably disposed at positions that are relatively symmetrical with respect to a plane defined by the long side direction and the up-down direction of the protruding portion.

[0020] The protruding portion preferably has a tapered portion whose cross section perpendicular to the long side direction is tapered from the bottom surface to the tip end.

[0021] A thin-walled portion is preferably provided at a position on the lower end side of the tapered portion and has a thickness that is thinner than the tapered portion.

[0022] The container is preferably one in which the inner bottom surface, which is the bottom surface on the inner side, is a curved shape that is convex toward the inner side of the container, and the radius of curvature of the inner bottom surface in the central region of the container is smaller than the radius of curvature at the surrounding region around the central region.

[0023] A container is one that has a housing portion and a protruding portion, and the bottom surface of the housing portion preferably has a central portion that is recessed with respect to the surrounding portion and has a bottom that is cantilevered, and the protruding portion is configured to protrude downward from the central portion. The inner bottom surface, which is the bottom surface on the inner side, is a curved shape that is convex toward the inner side of the container, and the radius of curvature of the inner bottom surface in the central region of the container is smaller than the radius of curvature at the surrounding region around the central region.

[0024] (Second Viewpoint) A laminated peeling container is provided that has a container body having an outer bag and an inner bag, in which the container body has a trunk portion, a shoulder portion, and a mouth portion. The trunk portion is formed in a bottomed cylindrical shape, and the trunk portion is connected to the shoulder portion. The shoulder portion has a flat surface portion and a reinforcing recess portion. The flat surface portion is connected to the mouth portion. The reinforcing recess portion is recessed in a direction from the outer bag side to the inner bag side, and the reinforcing recess portion extends from the flat surface portion side to a position that is hidden by the mouth portion when the container body is viewed from above.

[0025] According to the present application, the reinforcing recess extends from a position hidden in the mouth portion when viewed from the top of the container main body, from the flat surface portion side, and as a result, the reinforcing recess is closer to a portion where the mouth portion and the shoulder portion are connected, so that the mouth portion can be prevented from bending and retracting to the shoulder portion side.

[0026] Hereinafter, various embodiments of the present application will be illustrated. The embodiments shown below can be combined with each other.

[0027] A laminated peeling container is provided, preferably the mouth portion has a root portion, and the root portion is formed to be raised on the flat surface portion, and the reinforcing recess reaches the root portion from the flat surface portion side.

[0028] A laminated peeling container is provided, preferably the shoulder portion is projected in a manner that protrudes from the inside space side of the container main body to the outside space side of the container main body.

[0029] A laminated peeling container is provided, preferably a first reinforcing recess and a second reinforcing recess corresponding to the reinforcing recess are formed on the shoulder portion, and the first reinforcing recess and the second reinforcing recess are arranged to be 180 degrees with reference to the center axis of the shoulder portion.

[0030] A laminated peeling container is provided, preferably the reinforcing recess has a bottom wall portion, a first side wall portion, and a second side wall portion, the first side wall portion and the second side wall portion are respectively provided at one side end and the other side end of the bottom wall portion, and the bottom wall portion, the first side wall portion, and the second side wall portion reach the root portion.

[0031] A laminated peeling container is provided, preferably the inclination angle of the bottom wall portion is constant from the flat surface portion side to the root portion.

[0032] A laminated peeling container is provided, preferably the shoulder portion further has a curved surface portion, the curved surface portion is formed in a cylindrical shape, and the curved surface portion is connected to the flat surface portion and the trunk portion.

[0033] (3rd viewpoint) A laminated peelable container according to the present application is a laminated peelable container provided with a lid, a container main body, and a valve member, the container main body having an outer shell and an inner bag and configured to shrink the inner bag as contents decrease, the container main body provided with a mouth portion discharging the contents, an outside air introduction hole communicating an intermediate space between the outer shell and the inner bag and an outside space, the lid mounted on the mouth portion and provided with a check valve, the check valve provided with a cylindrical main body portion having a through hole, and a lid portion configured to open and close the through hole, the lid portion provided with an inclined surface abutting against a rim of the through hole to close the through hole, the main body portion and the lid portion connected by a hinge portion and configured to rotate the lid portion about the hinge portion to open the through hole, the valve member provided with a cylinder and a moving body, the cylinder having a hollow portion provided to communicate the intermediate space and the outside space, the moving body housed to be movable in the hollow portion, the cylinder having a stop portion engaging with the moving body and blocking air flow through the hollow portion when the moving body moves toward the outside space.

[0034] The present inventors have found that a method of inhibiting inflow of outside air into an inner bag can be achieved by relatively easily mounting a valve member having a specific structure on a main body.

[0035] Various embodiments of the present application will be described below. The embodiments shown below can be combined with each other.

[0036] A laminated peelable container, preferably an angle between an inner surface of the main body portion and the inclined surface is 25.1 degrees or more.

[0037] A laminated peelable container, preferably the moving body is spherical.

[0038] A laminated peelable container, preferably a weight of the moving body is 0.0250 g or less.

[0039] A laminated peelable container, preferably a weight of the moving body is 0.0150 g or less.

[0040] A laminated peelable container, preferably a diameter of the moving body is 2.356 mm to 2.406 mm. BRIEF DESCRIPTION OF DRAWINGS

[0041] Figure 1 is a perspective view of a laminated peelable container 1 according to a first embodiment of a first aspect of the present application.

[0042] Figure 2 is a cross-sectional view of a region of the valve member 4 of the laminated peelable container 1 in Figure 1

[0043] ​Figure 3 It includes Figure 1 A three-dimensional view of the bottom 30 region of the layered peeling container 1.

[0044] Figure 4 yes Figure 1 Bottom view of the stacked peeling container 1.

[0045] Figure 5A yes Figure 4 AA section view in the middle, Figure 5B yes Figure 4 BB cross-section diagram in the middle, Figure 5C yes Figure 5B An enlarged view of the main structure in the cross-section.

[0046] Figure 6 yes Figure 5A A partially enlarged cross-sectional view of region E.

[0047] Figure 7A This diagram is meant to illustrate the shape of the lower end of the protrusion in the past. Figure 7B This figure is a diagram that emphasizes the shape of the lower end of the protrusion 40 of the stacked peeling container 1 of the present invention.

[0048] Figure 8A This is a diagram showing the shape of the protrusion involved in a modified example of the present invention. Figure 8B This is a diagram showing the shape of the protrusion involved in other variations of the present invention.

[0049] Figure 9 This is a perspective view of the area of ​​the bottom 30 of the stacked peeling container 1 according to the second embodiment of the first aspect of the present invention.

[0050] Figure 10 yes Figure 9 The bottom view.

[0051] Figure 11 yes Figure 10 AA section view.

[0052] Figure 12A yes Figure 10 BB cross-section diagram in the middle, Figure 12B yes Figure 12A An enlarged view of region B in the diagram.

[0053] Figures 13A-13C These are, respectively, a front view of the stacked peeling container 1 according to the second embodiment, a perspective view showing the front, and a view showing the upper surface.

[0054] Figure 14 yes Figure 13B An enlarged view of the stacked peeling container 1 shown.

[0055] Figures 15A-15B They are Figure 13A A rear view of the stacked peeling container 1 and a perspective view showing the rear side.

[0056] Figure 16 yes Figure 15B An enlarged view of the stacked peeling container 1 shown.

[0057] Figure 17A yes Figure 13C The AA cross-sectional view shown is shown. Figure 17B yes Figure 17A The enlarged view of the opening 9 and its surroundings shows the state with the pressure cap Cp installed on the opening 9.

[0058] Figure 18 yes Figure 13C The BB cross-section shown is shown.

[0059] Figure 19A yes Figure 17A The CC cross-section shown is shown. Figure 19B yes Figure 19A An enlarged view of the four corner regions B shown.

[0060] Figure 20A yes Figure 17A The diagram shows the end face of AA. Figure 20B yes Figure 17A The image shows the BB end face view.

[0061] Figure 21 This is a front view of the stacked peeling container 1 according to an embodiment of the third aspect of the present invention.

[0062] Figure 22 Is it to display included Figure 21 A cross-sectional view of the main parts of the cover 2 and valve component 4 of the stacked peeling container 1.

[0063] Figure 23 yes Figure 22 An enlarged view of cover 2.

[0064] Figure 24 express Figure 23 Check valve 26, Figure 24 A is a 3D diagram. Figure 24 B is the display and Figure 23 A 3D view of the same cross-section.

[0065] Figure 25 In the context of Figure 23 A cross-sectional view of check valve 26 at the same cross-section. Figure 25 A is in the off state. Figure 25 B is in an open state.

[0066] Figure 26A View from aboveFigure 22 a perspective view of the valve member 4 from below, Figure 26B a perspective view of the same valve member 4 from below.

[0067] Figure 27A Figure 22 a plan view of the valve member 4, Figure 27B a bottom view of the valve member 4.

[0068] Figure 28A Figure 27A a cross-sectional view taken along line A-A in Figure 28B a cross-sectional view taken along line B-B in Figure 27A .

[0069] Figures 29A-29C are end surface views taken along lines C-C, D-D, and E-E in Figure 28A and Figure 28B .

[0070] Figure 30A is a cross-sectional view showing a state after the valve member 4 is installed in the housing 12, Figure 30B is a cross-sectional view showing a state in which the moving body 6 abuts against the stop portion 52s to close the hollow portion 50.

[0071] Figure 31 is a perspective view showing the structure of the valve member of Comparative Example 1. DETAILED DESCRIPTION

[0072] Embodiments of the present application will be described below. The various technical features shown in the embodiments exemplified below can be combined with each other. Also, each technical feature can accomplish the present application independently.

[0073] (Embodiments of the First Aspect) 1. First Embodiment of the First Aspect 1-1. Overall Structure As shown in Figure 1 , the laminate peelable container 1 according to the first embodiment of the first aspect of the present application is provided with a substantially cylindrical container body 3 having a bottom and a valve member 4. The container body 3 is provided with a housing portion 17 that houses contents and a mouth portion 9 that discharges the contents from the housing portion 17.

[0074] As shown in Figure 2 , the container body 3 is provided with an outer layer 11 and an inner layer 13 at the housing portion 17 and the mouth portion 9, and is formed of the outer layer 11 as a housing 12 and the inner layer 13 as an inner bag 14. As the contents decrease, the inner layer 13 peels from the outer layer 11, and thus the inner bag 14 peels and shrinks from the housing 12.

[0075] ​​A fitting portion 9e capable of being engaged with a cap (not shown) provided with a check valve is provided in the mouth portion 9. The cap can be of a press-fitting type or a screwing type.

[0076] As shown in Figure 2 , the valve member 4 is inserted into the outside air introduction hole 15 formed in the housing portion 17. The valve member 4 is used to regulate the air exchange between the intermediate space between the outer case 12 and the inner bag 14 and the outside. The valve member 4 according to the present embodiment is configured to close the outside air introduction hole 15 when the outer case 12 is compressed to compress the inner bag 14, and to introduce outside air into the intermediate space when the compression force on the outer case 12 is released.

[0077] The housing portion 17 is covered with a shrink film after the valve member 4 is installed. At this time, the valve member 4 is installed on a valve member installation recess 3r provided in the housing portion 17 in such a manner that the valve member 4 does not interfere with the shrink film.

[0078] 1-2. Structure of the bottom portion 30 Next, the region near the bottom portion 30 of the housing portion 17 according to the present embodiment will be described with reference to Figures 3-6 . Note that, in Figure 5A and Figure 5B , the outer layer 11 and the inner layer 13 are not distinguished.

[0079] As shown in Figure 3 and Figure 4 , the bottom portion 30 of the housing portion 17 is provided with a central portion 31 and a peripheral portion 32. The peripheral portion 32 is provided around the central portion 31. The central portion 31 is recessed toward the inside of the container more than the peripheral portion 32, and is a convex bottom portion. Further, a protruding portion 40 protruding downward from the bottom surface is formed in the central portion 31.

[0080] As shown in an enlarged sectional view of the region E in Figure 5A (i.e. Figure 6 ), the protruding portion 40 is provided with a tapered portion 41 and a thin-walled portion 42. As shown in Figure 6 , the cross-sectional shape perpendicular to the longitudinal direction of the tapered portion 41 is tapered toward the tip end from the bottom surface. The thin-walled portion 42 is formed at a position on the lower end side of the tapered portion 41, and is thinner than the tapered portion 41. The cross-sectional shape of the thin-walled portion 42 is a rectangle with the direction perpendicular to the bottom surface as the longer side (see Figure 6 ). As shown in Figure 3 and Figure 5B , the protruding portion 40 is formed so as to span the entire bottom portion 30 in the longitudinal direction thereof (the left-right direction in Figure 5B ). Therefore, a part of the peripheral portion 32 is a recessed portion 33 (see Figure 3 ), and the central portion 31 and the recessed portion 33 are connected at this part.

[0081] It should be noted that the protrusion 40 protrudes from the central portion 31 and the recessed portion 33, which protrude upwards from the bottom of the peripheral portion 32, and therefore does not protrude further from the contact surface H defined by the peripheral portion 32 (see reference). Figure 5A The thin-walled portion 42 is located above the ground surface H.

[0082] like Figure 5B and Figure 7B As shown in the enlarged explanatory diagram (end view), the protrusion 40 according to this embodiment has a slightly upward (inward direction of the container) curved portion 43 in the region including the central portion of its lower end (lower end of the thin-walled portion 42) in the long side direction. In other words, the central portion of the lower end of the protrusion 40 in the long side direction is recessed upward. This will be described later.

[0083] 1-3. Shaping The stacked peelable container 1 described in this embodiment is formed by blow molding using a stacked preform. In this case, the stacked preform is clamped at the lower end of the protrusion 40 (the lower end of the thin-walled portion 42). That is, the portion of the stacked preform clamped by the mold defines the shape of the lower end of the protrusion 40.

[0084] During blow molding, when the mold is closed, the outer shell 12 and the inner bag 14 are sealed at the protrusion 40. At this time, the tapered portion 41 is tapered, and the thin-walled portion 42 becomes thinner. Therefore, the proportion of the inner layer 13 relative to the outer layer 11 at the protrusion 40 is less than that of the inner layer 13 in other parts of the bottom 30, the sides of the container body 3, and other locations. Therefore, as Figure 6 As shown, in at least a portion of the lower end of the protrusion 40, the outer layers 11 are fused together, meaning that the left and right outer layers 11 separated by the sealing portion are directly fused together without passing through the inner layer 13. With this structure, compared to a structure where the outer layers 11 are entirely fused together through the inner layer 13 at the protrusion 40, the welding force of the clamped portion is increased, thereby improving impact resistance.

[0085] It should be noted that the protrusion 40 in this embodiment is a structure with a non-bent lower end. Therefore, as Figure 6 As shown, at the protrusion 40, the outer layer 11 constituting the outer shell 12 and the inner layer 13 constituting the inner bag 14 are disposed relative to each other. Figure 4 The plane defined by the BB line (i.e. the plane defined by the long side direction and the vertical direction of the protrusion) is symmetrical.

[0086] 1-4. Shape of the lower end of the protrusion 40 In containers with protruding bottoms that were traditionally formed by blow molding or similar methods, such as Figure 7AThe lower end of the protruding portion is formed in a straight line across the long side direction as shown in the end view. This is because of the limitation of the mold shape, and in order to ensure the sealing area of the sealing laminate parison as much as possible above the ground surface H (refer to Figure 5C ). Thus, the container in which the lower end of the protruding portion is a straight line is likely to have the protruding portion cracked due to the impact of dropping or the like.

[0087] However, the inventors of the present application conducted a dropping experiment of the laminate peelable container in a state where the container was filled with contents, and observed the deformation process of the bottom at the moment of impact by using a video camera. As a result, it was found that the central portion of the bottom was immediately and instantaneously turned upside down to protrude downward after the impact. Thus, the stress in the stretching direction was concentrated on the central portion of the long side direction of the lower end of the protruding portion, and cracking perpendicular to the long side direction (i.e., the short side direction) occurred in the portion.

[0088] Based on this phenomenon, the inventors of the present application completed the present application by providing a structure in which the curved portion 43 is provided so as to curve the central portion of the long side direction of the lower end of the protruding portion 40 upward (in the inside direction of the container) as shown in Figure 5B and Figure 7B .

[0089] Note that the structure in which the curved portion 43 is provided in the protruding portion 40 is a structure in which the shape of the pinch-off portion of the mold is curved. This is a relatively easy change in the shape of the mold, and in other words, no other post-mold cracking prevention processing of the protruding portion 40 is required to prevent cracking. Due to this simple structure, the side surface of the protruding portion 40 according to the present embodiment (the surface shown in Figure 5B ) is a flat shape corresponding to the shape of the mold.

[0090] The curved portion 43 is curved slightly, and is preferably smaller in area due to the curvature. This is because if the protruding portion 40 is curved too much, a shape that is too concave is formed, and the sealing area of the outer shell 12 and the inner bag 14 at the protruding portion 40 is reduced, so that the impact resistance, particularly the impact resistance against cracking in the long side direction, is deteriorated (note that Figure 7B is a drawing showing the shape after the curvature is emphasized, and does not show the correct shape).

[0091] As shown in Figure 5CAs shown, in this embodiment, the curved portion 43 has a distance L2 from the top 31t, the highest point above the bottom surface of the central portion 31, to the contact surface H, and a distance L1 from the top 31t to the deepest recess 43t where the curvature of the curved portion 43 is greatest. The ratio X1 (=L1 / L2) of L1 to L2 is 0.75 to 0.99. The ratio X1 is preferably 0.85 to 0.95, and more preferably 0.88 to 0.93. The value of the ratio X1 can be, for example, 0.75, 0.76, 0.77, 0.78, 0.79, 0.80, 0.81, 0.82, 0.83, 0.84, 0.85, 0.86, 0.87, 0.88, 0.89, 0.90, 0.91, 0.92, 0.93, 0.94, 0.95, 0.96, 0.97, 0.98, and 0.99, or it can be within the range of any two values ​​listed here.

[0092] The curved portion 43 of the protrusion 40 involved in this embodiment is from, for example Figure 5B The arc shape shown when viewed from the side, as... Figure 5C The radius of curvature Ra of the curved portion 43 shown is greater than that of the same Figure 5C The radius Rb of the bottom 30 shown is large. Specifically, the ratio X2 (=R1 / R2) of the radius of curvature Ra of the curved portion 43 relative to the radius Rb of the bottom 30 is preferably 3.0 or more. The ratio X2 is more preferably 4.0 or more, further preferably 5.0 to 10, even more preferably 6.0 to 8.0, and most preferably 6.5 to 7.5. The value of the ratio X2 can be, specifically, such as 5.0, 5.1, 5.2, 5.3, 5.4, 5.5, 5.6, 5.7, 5.8, 5.9, 6.0, 6.1, 6.2, 6.3, 6.4, 6.5, 6.6, 6.7, 6.8, 6.9, 7.0, 7.1, 7.2, 7.3, 7.4, 7.5, 7.6, 7.7, 7.8, 7.9, 8.0, 8.1, 8.2, 8.3, 8.4, 8.5, 8.6, 8.7, 8.8, 8.9, 9.0, 9.1, 9.2, 9.3, 9.4, 9.5, 9.6, 9.7, 9.8, 9.9, 10.0, or it can be within the range of any two values ​​listed here.

[0093] 1-5. Effects In this embodiment, the central portion of the protrusion 40 at its lower end in the long side direction bends upward. Therefore, when the central portion 31 of the bottom 30 protrudes (expands) downward from the bottom surface, the stress in the long side direction at the central portion of the lower end of the protrusion 40 is applied in the compressive direction rather than the tensile direction. Thus, cracking in the short side direction at the central portion can be suppressed.

[0094] Further, by making the bent portion 43 slightly curved, it is possible to suppress cracking in the short side direction at the central portion while ensuring the sealing area at the protruding portion 40 to suppress cracking in the long side direction.

[0095] Further, by making the central portion in the long side direction of the lower end of the protruding portion 40 curved upward, even if the bottom surface swells and protrudes downward, the central portion in the long side direction of the lower end of the protruding portion 40 does not protrude downward more than the ground surface H defined by the peripheral portion 32. Thus, it is possible to prevent the container from overturning.

[0096] Sometimes, a high-temperature content (hot compress) is filled in the housing portion 17, and a shrink film is attached to the housing portion 17 in a state where the container 1 is heated. Since the container 1 is softened by heating, when a shrink film is attached in a heated state in the conventional container, the protruding portion 40 can be deformed downward so that the container 1 is deformed (i.e., the container 1 protrudes backward) due to the compression of the housing portion 17 at the time of attachment, and thus the protruding portion 40 can protrude from the ground surface H so that the container is easily overturned. If the container according to the present embodiment is used, since the bent portion 43 is provided at the lower end of the protruding portion 40, the protruding portion 40 is not easily deformed downward, and thus it is possible to suppress the protruding portion 40 from protruding backward.

[0097] 1-6. Modified example Note that the present application can also be implemented in the following manner.

[0098] In the above embodiment, although the protruding portion 40 is formed from the tapered portion 41 and the thin-walled portion 42, the thin-walled portion 42 is not essential. When the thin-walled portion 42 is not provided, by making the central portion in the long side direction of the lower end of the tapered portion 41 curved upward, the same effect as the above embodiment can be obtained. Further, the cross-sectional shape of the protruding portion 40 can not be tapered, but can be, for example, rectangular.

[0099] In the above embodiment, as shown in the schematic view of Figure 7B , the lower end of the protruding portion 40 is curved almost across the long side direction. Meanwhile, as shown in Figure 8A , the lower end of the protruding portion 40 can also be made to be curved only in the central portion in the long side direction upward. Further, as shown in Figure 8B , the curved portion of the lower end of the protruding portion 40 can also be included in the central portion in the long side direction of the protruding portion and slightly offset from the center. These shapes also make it possible to suppress cracking in the short side direction at the central portion.

[0100] 2. Second embodiment of the first aspect The use of Figures 9-12BThe laminated peeling container 1 according to the second embodiment of the first aspect of the present application will be described. The container 1 according to the present embodiment is similar to the first embodiment of the first aspect, and the main difference is the structure of the inner bottom surface la on the inner side of the container 1. The following description will focus on this difference.

[0101] In the present embodiment, the inner bottom surface la is a curved shape convex toward the inner side of the container, and the radius of curvature Cl at the central region Pl of the container 1 is smaller than the radius of curvature C2 at the surrounding region P2 located around the central region Pl. According to such a structure, the deformation of the protrusion 40 downward is less likely to occur. Therefore, the deformation of the protrusion 40 downward when the shrink film is immediately installed after the hot pack can be suppressed.

[0102] C1 / C2 is 0.1 to 0.9, preferably 0.2 to 0.6, and specifically can be 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, or a range between any two of the values exemplified herein.

[0103] Let Yl be the distance from the center C of the container to the boundary of the regions Pl and P2, and Y2 be the distance from the center C of the container to the lowest portion 32b at the periphery of the inner bottom surface la, and Y1 / Y2 is 0.1 to 0.9, preferably 0.2 to 0.6, and specifically can be 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, or a range between any two of the values exemplified herein.

[0104] It should be noted that the shape of the inner bottom surface la described in the second embodiment of the first aspect can also be applied to a container without the protrusion 40. Even in such a case, by making the radius of curvature Cl smaller than the radius of curvature C2, the deformation of the protrusion 40 downward can be suppressed.

[0105] 3. Other embodiments of the first aspect In the above embodiments, although the laminated peeling container 1 as the container has been described, the present application can also be applied to other containers other than the laminated peeling container. That is, as long as the container has a protrusion, by bending the region including the center of the long side direction of the lower end of the protrusion upward, the stress at the center portion in the long side direction can be alleviated to suppress the occurrence of cracking.

[0106] (Embodiments of the second aspect) 1. Structure of the laminated peeling container 1 As Figures 13A-14As shown, the laminated peelable container 1 is provided with a container main body 3 and a valve member 4. The container main body 3 is provided with a trunk portion 7 that houses a content, a shoulder portion 8 that houses the content, and a mouth portion 9 that discharges the content in the container main body 3 to the outside of the container main body 3. As shown in Figure 17B As shown, the mouth portion 9 is provided with a pressure cap Cp. That is, the mouth portion 9 is a press type mouth portion, and the pressure cap Cp is attached to the mouth portion 9 by being pressed against the mouth portion 9. Note that, in Figure 17B , the pressure cap Cp is schematically shown by a broken line.

[0107] 1-1. Container main body 3 1-1-1. Outer shell 12 and inner bag 14 The trunk portion 7, the shoulder portion 8, and the mouth portion 9 of the container main body 3 are provided with an outer shell 12 and an inner bag 14. As the content decreases, the inner bag 14 peels from the inner surface of the outer shell 12, and the inner bag 14 separates and shrinks from the inner surface of the outer shell 12. The thickness of the outer shell 12 is greater than that of the inner bag 14 to improve the recovery property. The outer shell 12 is composed of, for example, low-density polyethylene, linear low-density polyethylene, high-density polyethylene, polypropylene, an ethylene-propylene copolymer, and a mixture thereof. The outer shell 12 can be composed of a plurality of layers. The inner bag 14 is preferably composed of a plurality of layers. For example, an EVOH layer composed of an ethylene-vinyl alcohol copolymer (EVOH) resin is used in a layer that contacts the outer shell 12, and an inner surface layer composed of, for example, a polyolefin such as low-density polyethylene, linear low-density polyethylene, high-density polyethylene, polypropylene, an ethylene-propylene copolymer, and a mixture thereof can be used in a layer that contacts the content. Further, an adhesive layer is preferably used between the EVOH layer and the inner surface layer.

[0108] 1-1-2. Trunk portion 7 As shown in Figure 13A and Figure 13B The trunk portion 7 is a bottomed cylindrical member. The trunk portion 7 is provided with an upper portion 7A, a necked portion 7B, and a bottom portion 7C. The outer diameter of the necked portion 7B is smaller than that of the upper portion 7A, and thus the necked portion 7B is easily held by a user. The upper portion 7A is connected to the shoulder portion 8.

[0109] 1-1-2. Shoulder portion 8 As shown in Figure 14 and Figure 16 The upper end of the shoulder portion 8 is connected to the mouth portion 9, and the lower end of the shoulder portion 8 is connected to the trunk portion 7. As shown in Figure 18 The shoulder portion 8 is convexly projected from the inside space S2 side of the container main body 3 to the outside space S1 side of the container main body 3, and thus the container main body 3 is a shape in which the content volume is easily ensured. Specifically, as shown in Figure 18As shown in the drawing, the position of the inner side surface of the root 9A to be mentioned later is taken as the position PI, the position of the inner side surface of the portion where the curved surface portion 8B is connected to the upper portion 7A is taken as the position P2, and a straight line passing through the position PI and the position P2 is taken as an imaginary line G. The shoulder portion 8 is convexly projected from the side of the imaginary line G toward the outside space SI side direction Dr. That is, the entire shoulder portion 8 is convexly projected toward the direction Dr.

[0110] The shoulder portion 8 has a flat surface portion 8A and a curved surface portion 8B. The flat surface portion 8A is provided above the curved surface portion 8B. The flat surface portion 8A is formed as a ring-shaped member, and the flat surface portion 8A is formed as a flat plate. The inner side edge of the flat surface portion 8A is in contact with the mouth portion 9, and the outer side edge of the flat surface portion 8A is connected to the curved surface portion 8B. The flat surface portion 8A is inclined downward from the side of the mouth portion 9 to the side of the curved surface portion 8B. The curved surface portion 8B is formed as a cylindrical shape. The upper end portion of the curved surface portion 8B is connected to the flat surface portion 8A, and the lower end portion of the curved surface portion 8B is connected to the trunk portion 7. The curved surface portion 8B is inclined downward from the side of the flat surface portion 8A to the trunk portion 7, and the inclination angle of the outer surface of the curved surface portion 8B is larger than the inclination angle of the outer surface of the flat surface portion 8A.

[0111] As shown in the drawing, Figure 13A , Figure 13B , Figure 15A and Figure 15B As shown in the drawing, the shoulder portion 8 is formed with reinforcing recesses Rf, Rr. One of the reinforcing recesses Rf and the reinforcing recess Rr corresponds to the first reinforcing recess, and the other corresponds to the second reinforcing recess. The reinforcing recesses Rf, Rr reinforce the root 9A of the mouth portion 9. That is, by the reinforcing recesses Rf, Rr being formed in the shoulder portion 8, the root 9A is reinforced by the reinforcing recesses Rf, Rr, and thus the bending of the mouth portion 9 is suppressed from being retracted to the shoulder portion 8 side. The reinforcing recess Rf is formed on the front side of the container main body 3, and the reinforcing recess Rf is formed on the back side of the container main body 3. The reinforcing recesses Rf, Rr are arranged so as to be 180 degrees with the center axis of the shoulder portion 8 as a reference. That is, the reinforcing recess Rf, a point on the center axis of the shoulder portion 8, and the reinforcing recess Rr are arranged in a straight line. The reinforcing recesses Rf, Rr are arranged so as to be 180 degrees with the center axis of the shoulder portion 8 as a reference, and thus the reinforcing regions of the reinforcing recesses Rf, Rr are suppressed from deviating, and the bending of the mouth portion 9 is more reliably suppressed from being retracted to the shoulder portion 8 side.

[0112] 1-1-3. Mouth portion 9 The mouth portion 9 is connected to the upper portion of the trunk portion 7. The mouth portion 9 is a cylindrical member. As shown in the drawing, Figure 17A and Figure 17BAs shown, the mouth portion 9 has a root portion 9A, an upright portion 9B, an enlarged diameter portion 9D, a wall portion 9E, a mounting protrusion 9C, a tapered front wall portion 9F, and an upper mouth portion 9G. The root portion 9A is the part where the mouth portion 9 connects to the shoulder portion 8, that is, the part provided at the root of the mouth portion 9. The root portion 9A is formed such that the flat surface 8A rises upwards. The height dimension of the root portion 9A, that is, the upward amount of the root portion 9A, is, for example, 0.5mm to 2.0mm. In addition, the difference between the inner and outer diameters of the root portion 9A is 0.5mm to 2.0mm. The outer surface of the root portion 9A is provided to slope from the upright portion 9B to the flat surface 8A. That is, the outer surface of the root portion 9A is conical. The upright portion 9B extends in the vertical direction. That is, the upright portion 9B is a straight cylindrical portion. The diameter of the upright portion 9B is smaller than the diameter of the root portion 9A. Figure 14 , Figure 17A and Figure 17B The opening 9 is formed with a necked shape 9H from the root portion 9A, the upright portion 9B to the widened portion 9D. The widened portion 9D extends in a direction substantially perpendicular to the central axis of the container body 3. The inner side of the widened portion 9D is connected to the upright portion 9B, and the outer side of the widened portion 9D is connected to the wall portion 9E. The wall portion 9E extends upward. The upper end of the wall portion 9E is connected to the mounting protrusion 9C. The mounting protrusion 9C is the portion for mounting the pressure cap Cp, and the outer diameter of the mounting protrusion 9C is the largest of the outer diameters of the opening 9. The tapered wall portion 9F is formed with a tapered front end from the mounting protrusion 9C side to the upper end portion 9G side of the opening. The upper end portion 9G of the opening corresponds to the contents flow outlet inside the container body 3, and the upper end portion 9G of the opening is located at the uppermost part of the opening 9.

[0113] 1-2. Valve component 4 like Figure 17A The valve component 4 is installed in the external air inlet 15 formed on the body 7 to regulate the airflow between the intermediate space 21 between the outer shell 12 and the inner bag 14 and the external space S1. The external air inlet 15 is a through hole only provided on the outer shell 12 and does not reach the inner bag 14. The valve component 4 includes a cylindrical body 5 configured to communicate between the intermediate space 21 and the external space S1, and a movable body 6 housed within the cylindrical body 5. The cylindrical body 5 and the movable body 6 are formed by injection molding or the like. The movable body 6 is preferably spherical.

[0114] 2. Detailed description of the reinforced recess 2-1. Reinforce the concave portion Rf like Figure 14 , Figure 19A and Figure 19BAs shown, the formation range of the reinforcing recess Rf extends over the root 9A of the mouth portion 9, the flat surface portion 8A, and the curved surface portion 8B. That is, the reinforcing recess Rf does not only form in the curved surface portion 8B and the flat surface portion 8A, but reaches the root 9A from the curved surface portion 8B. In other words, the reinforcing recess Rf is formed in a manner extending from the curved surface portion 8B to the root 9A. The reinforcing recess Rf has a first recess Rl and a second recess R2. The first recess Rl and the second recess R2 are connected, and the first recess Rl extends linearly from the portion connected to the second recess R2 to the root 9A. The second recess R2 is substantially circular, and the valve member 4 is disposed in the second recess R2.

[0115] As shown in FIG. 1, the shoulder portion 8 has a bottom wall portion 8al, a pair of side wall portions 8a2, a circular wall portion 8a3, and an arc wall portion 8a4. One of the pair of side wall portions 8a2 corresponds to the first side wall portion, and the other of the pair of side wall portions 8a2 corresponds to the second side wall portion. The first recess Rl is formed by the bottom wall portion 8al and the pair of side wall portions 8a2, and the second recess R2 is formed by the circular wall portion 8a3 and the arc wall portion 8a4. The bottom wall portion 8al is disposed so as to span the root 9A, the flat surface portion 8A, and the curved surface portion 8B. Similarly, the pair of side wall portions 8a2 is disposed so as to span the root 9A, the flat surface portion 8A, and the curved surface portion 8B. Figure 14 , Figure 17A , Figure 20A and Figure 20B As shown, the shoulder portion 8 has a bottom wall portion 8al, a pair of side wall portions 8a2, a circular wall portion 8a3, and an arc wall portion 8a4. One of the pair of side wall portions 8a2 corresponds to the first side wall portion, and the other of the pair of side wall portions 8a2 corresponds to the second side wall portion. The first recess Rl is formed by the bottom wall portion 8al and the pair of side wall portions 8a2, and the second recess R2 is formed by the circular wall portion 8a3 and the arc wall portion 8a4. The bottom wall portion 8al is disposed so as to span the root 9A, the flat surface portion 8A, and the curved surface portion 8B. Similarly, the pair of side wall portions 8a2 is disposed so as to span the root 9A, the flat surface portion 8A, and the curved surface portion 8B. Figure 20A As shown, one of the pair of side wall portions 8a2 is connected to one side end of the bottom wall portion 8al, and the other of the pair of side wall portions 8a2 is connected to the other side end of the bottom wall portion 8al. The angle formed by the bottom wall portion 8al and each of the side wall portions 8a2 is greater than 90 degrees. As shown, the outer surface of the bottom wall portion 8al and the outer surface of the circular wall portion 8a3 are inclined surfaces, and the inclination angle of the outer surface of the circular wall portion 8a3 is greater than the inclination angle of the outer surface of the bottom wall portion 8al. Figure 17A As shown, the outer surface of the bottom wall portion 8al and the outer surface of the circular wall portion 8a3 are inclined surfaces, and the inclination angle of the outer surface of the circular wall portion 8a3 is greater than the inclination angle of the outer surface of the bottom wall portion 8al.

[0116] As shown in FIG. 1, the shoulder portion 8 has a bottom wall portion 8al, a pair of side wall portions 8a2, a circular wall portion 8a3, and an arc wall portion 8a4. One of the pair of side wall portions 8a2 corresponds to the first side wall portion, and the other of the pair of side wall portions 8a2 corresponds to the second side wall portion. The first recess Rl is formed by the bottom wall portion 8al and the pair of side wall portions 8a2, and the second recess R2 is formed by the circular wall portion 8a3 and the arc wall portion 8a4. The bottom wall portion 8al is disposed so as to span the root 9A, the flat surface portion 8A, and the curved surface portion 8B. Similarly, the pair of side wall portions 8a2 is disposed so as to span the root 9A, the flat surface portion 8A, and the curved surface portion 8B. Figure 14As shown, the bottom wall portion 8a1 has an upper end portion a1, a middle portion a2, and a lower end portion a3. The inclination angle of the outer surface of the upper end portion a1, the middle portion a2, and the lower end portion a3 is the same. That is, the inclination angle of the outer surface of the bottom wall portion 8a1 is constant. Here, the inclination angle of the bottom wall portion 8a1 does not decrease from the middle portion a2 to the upper end portion a1, but rather the inclination angle of the bottom wall portion 8a1 is constant from the flat surface portion 8A side to the root portion 9A. In other words, the bottom wall portion 8a1 maintains its inclination angle, extending from the flat surface portion 8A side to the root portion 9A. Although the inclination angle of the upper end portion a1 is smaller than that of the middle portion a2, the bottom wall portion 8a1 is located on one side of the mouth portion 9, making it difficult for the bottom wall portion 8a1 to support the mouth portion 9. However, in this embodiment, the bottom wall portion 8a1 maintains an inclined angle from the middle portion a2 to the upper end portion a1 and continues until it reaches the root portion 9A. The bottom wall portion 8a1 is located closer to the opening portion 9 directly below it, thus the bottom wall portion 8a1 can more reliably support the opening portion 9. An external air inlet hole 15 is formed on the circular wall portion 8a3, and a valve component 4 is installed on the circular wall portion 8a3. The arc-shaped wall portion 8a4 is connected to the periphery of the circular wall portion 8a3.

[0117] like Figure 14 As shown, the width of the bottom wall portion 8a1 from the lower end a3 to the upper end a1 is constant. Here, "width" refers to the width in a direction parallel to the direction from one side wall portion 8a2 towards the other side wall portion 8a2. If the width of the upper end a1 gradually narrows towards the root portion 9A, the bottom wall portion 8a1 would find it difficult to support the opening 9. However, in this embodiment, since the width of the bottom wall portion 8a1 from the lower end a3 to the upper end a1 is constant, the bottom wall portion 8a1 can support the opening 9 more reliably.

[0118] 2-2. Reinforce the concave portion Rr like Figure 16 , Figure 19A and Figure 19B As shown, the forming range of the reinforcing recess Rr is the same as that of the reinforcing recess Rf, extending to the root 9A, flat surface 8A, and curved surface 8B of the opening 9. That is, the reinforcing recess Rr is not only formed on the curved surface 8B and flat surface 8A, but extends from the curved surface 8B to the root 9A. In other words, the reinforcing recess Rr is formed to extend from the curved surface 8B to the root 9A.

[0119] like Figure 16 , Figure 17A and Figure 20AAs shown, the shoulder portion 8 has a bottom wall portion 8b1 and a pair of side wall portions 8b2. One of the side wall portions 8b2 corresponds to a first side wall portion, and the other side wall portion 8b2 corresponds to a second side wall portion. The reinforcing recess Rr is formed by the bottom wall portion 8b1 and the pair of side wall portions 8b2. The bottom wall portion 8b1 is configured to span the root portion 9A, the flat surface portion 8A, and the curved surface portion 8B. Similarly, the pair of side wall portions 8b2 are configured to span the root portion 9A, the flat surface portion 8A, and the curved surface portion 8B. Figure 20A As shown, one sidewall portion 8b2 is connected to one end of the bottom wall portion 8b1, and the other sidewall portion 8b2 is connected to the other end of the bottom wall portion 8b1. The angle formed between the bottom wall portion 8b1 and each sidewall portion 8b2 is greater than 90 degrees. Figure 17A As shown, the outer surface of the bottom wall portion 8b1 is an inclined surface.

[0120] like Figure 16 As shown, the bottom wall portion 8b1 has an upper end portion b1, a middle portion b2, and a lower end portion b3. The inclination angle of the outer surface of the upper end portion b1 is the same as the inclination angle of the outer surface of the middle portion b2. It should be noted that the inclination angle of the outer surface of the lower end portion b3 is smaller than the inclination angle of the outer surface of the upper end portion b1. Furthermore, the inclination angle of the bottom wall portion 8b1 does not decrease from the middle portion b2 to the upper end portion b1, and the bottom wall portion 8b1 is constant from the flat surface portion 8A side to the root portion 9A. In other words, the bottom wall portion 8b1 maintains its inclination angle while extending from the flat surface portion 8A side to the root portion 9A. Since the bottom wall portion 8b1 maintains its inclination angle from the middle portion b2 to the upper end portion b1 and reaches the root portion 9A, the bottom wall portion 8b1 is located closer to the mouth portion 9 directly below, thereby enabling the bottom wall portion 8b1 to more reliably support the mouth portion 9.

[0121] like Figure 16 As shown, the width of the bottom wall portion 8b1 from the lower end b3 to the upper end b1 is constant. Here, "width" refers to the width in a direction parallel to the direction from one side wall portion 8b2 towards the other side wall portion 8b2. Therefore, the bottom wall portion 8b1 can more reliably support the opening 9.

[0122] 3. Manufacturing method of stacked peeling container Next, an example of the manufacturing method of the laminated peelable container 1 will be described. The laminated parison in a molten state is extruded from an extruder and put into a split mold for blow molding, and then the split mold is closed. Next, a blow nozzle is inserted into the opening portion on the mouth portion 9 side of the container body 3, and air is blown into the cavity of the split mold in the closed mold state. Then, the split mold is opened to take out the blow molded product. Then, the outer air introduction hole 15 is formed in the outer shell 12 of the container body 3 of the laminated peelable container 1. It should be noted that, when the outer air introduction hole 15 is formed, the peel tool is brought into abutment with the container body 3 in a state where the container body 3 is mounted to a support mold. The reinforcing recess Rr is engaged with the support mold in a state where the container body 3 is mounted to the support mold. That is, the reinforcing recess Rr not only functions to reinforce the root portion 9A of the mouth portion 9, but also functions to position the container body 3 in the axial direction when the outer air introduction hole 15 is formed.

[0123] 4. Effects of Embodiments There is a demand for large capacity (for example, 600 ml or more) of the container body 3 of the laminated peelable container 1. When the capacity of the container body 3 is increased, the shape of the mouth portion 9 is not necessarily changed. If the diameter of the mouth portion 9 is increased, there is a case where the existing cap cannot be continued to be used, and even if the diameter of the mouth portion 9 is increased, the capacity of the container body 3 is hardly increased. Therefore, when the capacity of the container body 3 is increased, for example, the diameter of the shoulder portion 8 or the diameter of the trunk portion 7 can be set to be large. In a case where the amount of the laminated parison used when one container body 3 is manufactured is constant, if the diameter of the shoulder portion 8 or the diameter of the trunk portion 7 is set to be large, the laminated parison in the split mold is extended accordingly. That is, although the thickness of the shoulder portion 8 or the thickness of the trunk portion 7 tends to be thinner than the thickness of the mouth portion 9, when the diameter of the shoulder portion 8 or the diameter of the trunk portion 7 is set to be large, the thickness of the shoulder portion 8 or the thickness of the trunk portion 7 tends to be thinner than the thickness of the mouth portion 9. When the thickness of the shoulder portion 8 is thin, the mouth portion 9 is easily bent and retracted on the shoulder portion 8 side. That is, as the capacity of the container body 3 is increased, the thickness of the shoulder portion 8 is easily made thin, so that the mouth portion 9 (the root portion 9A) is easily bent and retracted on the shoulder portion 8 side. The shoulder portion 8 of the container body 3 of the laminated peelable container 1 according to the present embodiment is formed with the reinforcing recesses Rf, Rr. The reinforcing recesses Rf, Rr have a function to support the mouth portion 9 as a rib.

[0124] Specifically, the reinforcing recesses Rf, Rr are formed in the shoulder portion 8, and a wall portion (bottom wall portion 8a1, 8b1 and side wall portion 8a2, 8b2) is formed on the reinforcing recesses Rf, Rr. The wall portion is formed to stand upright, and thus, compared with the flat surface portion 8A and the curved surface portion 8B, it is more resistant to external force in the up-down direction (a direction parallel to the central axis of the container body 3). That is, the wall portion functions as a reinforcing rib with the mouth portion 9 (root portion 9A) as a base when an external force in the up-down direction is applied to the mouth portion 9. In the present embodiment, the reinforcing recesses Rf, Rr reach the root portion 9A, and thus the wall portion functioning as a rib also reaches the root portion 9A. In this way, the root portion 9A is supported by the wall portion from a position near the position directly below the root portion 9A. The container body 3 of the laminate peelable container 1 according to the present embodiment is resistant to the action of embedding the root portion 9A into the shoulder portion 8. Thus, even if the volume of the container body 3 is increased and the thickness of the shoulder portion 8 is thinner than the thickness of the mouth portion 9, the mouth portion 9 (root portion 9A) of the container body 3 of the laminate peelable container 1 according to the present embodiment is still able to suppress bending from retreating to the shoulder portion 8 side.

[0125] The shoulder portion 8 of the container body 3 of the laminate peelable container 1 according to the present embodiment is projected in a manner that it is convex in the direction from the inside space S2 side of the container body 3 to the outside space S1 side of the container body 3. Thus, the container body 3 is a shape that can meet the demand for large volume. However, when the shoulder portion 8 is projected in a manner that it is convex in the direction from the inside space S2 side of the container body 3 to the outside space S1 side of the container body 3, it also correspondingly makes it difficult for the shoulder portion 8 to support the mouth portion 9 from a position directly below the mouth portion 9. As a result, when an external force is applied to the mouth portion 9, the mouth portion 9 (root portion 9A) is easily bent from retreating to the shoulder portion 8 side. The shoulder portion 8 of the container body 3 of the laminate peelable container 1 according to the present embodiment is formed with reinforcing recesses Rf, Rr that function as the above-mentioned ribs. In the present embodiment, the reinforcing recesses Rf, Rr reach the root portion 9A, and thus the wall portion functioning as a rib also reaches the root portion 9A. In this way, the root portion 9A is supported by the wall portion from a position near the position directly below the root portion 9A. As a result, the root portion 9A is resistant to the action of embedding into the shoulder portion 8 side, and thus the mouth portion 9 (root portion 9A) is suppressed from bending from retreating to the shoulder portion 8 side.

[0126] Note that the wall portion (bottom wall portion 8a1, 8b1 and side wall portion 8a2, 8b2) can be in the vertical direction. In this way, the root portion 9A is supported by the wall portion from a position directly below the root portion 9A, and thus the mouth portion 9 (root portion 9A) is further suppressed from bending from retreating to the shoulder portion 8 side.

[0127] In the present embodiment, the reinforcing recesses Rf, Rr reach the root 9A, and thus the resistance of the container body 3 to the action of the root 9A being embedded to the shoulder 8 side can be ensured even if the shoulder 8 does not have a necessary thickness.

[0128] In the present embodiment, the cap Cp is pressed against the mouth 9 and thus mounted to the mouth 9, as shown in Figure 17B When the cap Cp is pressed and mounted to the mouth 9, the mouth 9 is subjected to a force Fc that bends and retracts to the shoulder 8 side, as shown in Figure 17B The lower end portion Cp1 of the cap Cp is disposed above the standing portion 9B of the mouth 9, and a space Sp wider than the space between the lower end portion Cp1 of the cap Cp and the shoulder 8 of the container body 3 is provided in the mouth 9, as shown in The space Sp is provided in the mouth 9 to support the mouth 9 when the cap Cp is pressed and mounted to the mouth 9, and thus a support jig T needs to be disposed to the flared portion 9D. Thus, by providing the space Sp in the mouth 9, the lower portion of the mouth 9 is formed in a necked-down shape 9H, and if the reinforcing recesses Rf, Rr are not formed in the shoulder 8, the possibility of the mouth 9 bending and retracting to the shoulder 8 side when the container body 3 (the laminated peelable container 1) falls increases. Note that the necked-down shape 9H is still exposed to the outside in a state where the cap Cp is mounted to the mouth 9. Thus, if the cap Cp is mounted to the mouth 9 and the reinforcing recesses Rf, Rr are not formed in the shoulder 8, the possibility of the mouth 9 bending and retracting to the shoulder 8 side when the container body 3 (the laminated peelable container 1) falls increases. In contrast, the shoulder 8 of the container body 3 of the laminated peelable container 1 according to the present embodiment is formed with the reinforcing recesses Rf, Rr as described above, and thus even if the lower portion of the mouth 9 is in the necked-down shape 9H, the mouth 9 can be inhibited from bending and retracting to the shoulder 8 side. Thus, the effect of inhibiting the mouth 9 from bending and retracting to the shoulder 8 side can be exerted regardless of whether the cap Cp is mounted to the mouth 9 or not.

[0129] 5. Range of formation of reinforcing recesses Rf, Rr In the present embodiment, although an example in which the reinforcing recesses Rf, Rr reach the root 9A from the curved portion 8B side is described, the present embodiment is not limited to this. Specifically, as shown in Figures 13A-13C The reinforcing recesses Rf, Rr can extend from the flat portion 8A side to a position hidden by the mouth 9 (the mounting protrusion 9C) when the container body 3 is viewed from the upper surface side. In other words, as shown in Figure 17BAs shown, the upper end portion of the reinforcing recesses Rf, Rr is located closer to the center axis of the container body 3 than an imaginary line L extending in the vertical direction from the mounting protrusion 9C. The container body 3 having this structure can achieve the same effects as the above-described embodiment. Note that the laminated peelable container 1 according to the present embodiment is not limited to the one having the cap Cp mounted to the mouth 9. Instead of the cap Cp, a screw-type cap can be used on the cap of the laminated peelable container 1, and a thread portion that screws with the screw-type cap can be formed on the mouth 9 in place of the mounting protrusion 9C. Even the container body 3 having this structure can achieve the same effects as the above-described embodiment.

[0130] (Embodiment of the 3rd Aspect) As Figure 21 described, the laminated peelable container 1 according to one embodiment of the 3rd aspect of the present application has a cap 2, a container body 3, and a valve member 4. The container body 3 has a housing portion 17 that houses a content, and a mouth 9 that discharges the content from the housing portion 17.

[0131] As Figure 22 shown, the container body 3 has an outer shell 12 and an inner bag 14 between the housing portion 17 and the mouth 9. As the content decreases, the inner bag 14 peels from the outer shell 12, and thus the inner bag 14 separates and shrinks from the outer shell 12.

[0132] The outer shell 12 is formed to have a thickness higher than that of the inner bag 14 for recovery. The outer shell 12 can be composed of, for example, low-density polyethylene, linear low-density polyethylene, high-density polyethylene, polypropylene, an ethylene-propylene copolymer, and a mixture thereof. The outer shell 12 can be composed of a plurality of layers. The inner bag 14 is preferably composed of a plurality of layers. For example, an EVOH layer composed of an ethylene-vinyl alcohol copolymer (EVOH) resin can be used in a layer that contacts the outer shell 12, and an inner surface layer composed of a polyolefin such as low-density polyethylene, linear low-density polyethylene, high-density polyethylene, polypropylene, an ethylene-propylene copolymer, and a mixture thereof can be used in a layer that contacts the content. Further, an adhesive layer is preferably used between the EVOH layer and the inner surface layer.

[0133] The cap 2 is mounted to the mouth 9 of the container body 3. In the present embodiment, the cap 2 is screw-type, but can be press-type. As Figure 21 described, the cap 2 has a cap body 20 and a cap cover 22 formed of synthetic resin. The cap body 20 and the cap cover 22 are connected by a hinge 23, and the cap cover 22 is openable and closable. The cap body 20 has a main cap member 24, a check valve 26, and a pouring member 29. Note that the cap cover 22 is omitted in Figures 22-23 .

[0134] The main lid member 24 is a member that forms the outer shape of the lid 2, and has a cylindrical outer side cylinder portion 24o, a top plate portion 24t, an annular protruding portion 24p, and a screw groove 24e. The top plate portion 24t extends inward from the upper end of the outer side cylinder portion 24o, and the annular protruding portion 24p extends downward from the inner edge of the top plate portion 24t. The outer peripheral surface of the annular protruding portion 24p abuts against the inner peripheral surface of the mouth portion 9. The screw groove 24e is formed in the inner peripheral surface of the outer side cylinder portion 24o, and engages with the engagement portion of the mouth portion 9.

[0135] The check valve 26 is installed in the annular protruding portion 24p. As shown in Figures 24-25 , the check valve 26 has a main body portion 26a, a lid portion 26b, and a hinge portion 26c. The main body portion 26a is cylindrical and has a through-hole 26al. The lid portion 26b is configured to open and close the through-hole 26al. The lid portion 26b has an inclined surface 26bl. By the inclined surface 26bl abutting against the edge of the through-hole 26al, the through-hole 26al is closed and the check valve 26 becomes a closed state. The main body portion 26a and the lid portion 26b are connected by the hinge portion 26c. The hinge portion 26c is configured to be elastically deformable, and the lid portion 26b rotates about the hinge portion 26c by elastic deformation of the hinge portion 26c. In this way, the through-hole 26al is opened and the check valve 26 becomes an open state.

[0136] The check valve 26 is preferably formed of an elastomer such as a rubber material, and the main body portion 26a, the lid portion 26b, and the hinge portion 26c are preferably integrally formed.

[0137] The angle α of the inner surface 26a2 of the main body portion 26a and the inclined surface 26bl of the lid portion 26b is not particularly limited, but is preferably 25.1 degrees or more, and more preferably 25.5 degrees or more. The angle α can be 25.1 to 40 degrees, and specifically can be 25.1, 25.5, 26, 26.5, 27, 27.5, 28, 28.5, 29, 29.5, 30, 35, 40 degrees, or can be in a range between any two of the values exemplified here. If the angle α is too small, the lid portion 26b can be inserted into the through-hole 26al and the check valve 26 can not easily become an open state. Setting the angle α to 25.1 degrees or more is advantageous in making the check valve 26 become an open state.

[0138] The pouring member 29 has a thin plate-like disc portion 29d, a pouring port 29m, and an engagement portion 29e. The pouring port 29m is formed in the center of the disc portion 29d, and the engagement portion 29e engages with the inner edge of the top plate portion 24t of the main lid member 24. With this pouring member 29, it is possible to prevent dripping when the contents are discharged, and it is easy to control the direction of discharge.

[0139] As shown in Figure 22As shown, the valve member 4 is installed in the outside air introduction hole 15 formed in the housing portion 17, and functions to regulate the gas exchange between the intermediate space 21 between the outer case 12 and the inner bag 14 and the outside space S. The outside air introduction hole 15 is a through-hole provided only in the outer case 12, and does not reach the inner bag 14. As shown in Figure 22 、 Figure 26A and Figure 26B As shown, the valve member 4 has: a cylinder 5 provided so as to communicate the intermediate space 21 with the outside space S; and a moving body 6 housed so as to be movable within a hollow portion 50. The cylinder 5 and the moving body 6 are formed by injection molding or the like. The moving body 6 is preferably spherical.

[0140] As shown in Figures 26A-28B , the cylinder 5 has: a shaft portion 51 of a narrow diameter disposed within the outside air introduction hole 15; a locking portion 52 provided on the outside space S side of the shaft portion 51 to prevent the cylinder 5 from entering the intermediate space 21, and is disc-shaped; and a diameter expansion portion 53 provided on the intermediate space 21 side of the shaft portion 51 to prevent the cylinder 5 from being pulled out from the outside of the container main body 3. An upper surface 52u (i.e., an outer surface on the outside space S side of the cylinder 5) of the locking portion 52 is formed with an opening 52o connected to the hollow portion 50. An abutment region 52a is a circular flat region. Further, a protruding region 52p of a circular ring shape protruding toward the outside space S side from the abutment region 52a is formed on the outside of the abutment region 52a of the upper surface 52u of the locking portion 52.

[0141] The hollow portion 50 is a hole through the cylinder 5 in the axial direction (a direction perpendicular to the outside air introduction hole 15), and in order to house the spherical moving body 6, the intermediate space 21 side and the outside space S side in the axial direction are tapered with respect to the central portion. Specifically, as shown in Figure 28A and Figure 28B , the portion corresponding to the inside of the locking portion 52 on the intermediate space 21 side of the hollow portion 50 is a circular truncated cone shape that is tapered toward the outside space S side, and a stop portion 52s that engages with the moving body 6 to block the passage of gas is formed in the circumferential direction. On the intermediate space 21 side of the hollow portion 50, a pair of support portions 53p (refer to Figure 26B 、 Figure 28A ) are formed at two opposite positions, and the pair of support portions 53p protrude toward the radially inner side and support the moving body 6 housed within the hollow portion 50. In the present embodiment, the support portion 53p has an inclined surface 53p1 inclined toward the outside space S side, and the moving body 6 abuts against the inclined surface 53p1, so that the moving body 6 is supported.

[0142] With the above structure, as shown in Figure 29A to Figure 29CAs shown, the cross-sectional shape of the hollow portion 50 is circular with a diameter that gradually decreases toward the outside space S side at the position corresponding to the engagement portion 52 (C-C cross section). Further, the cross section at the position corresponding to the shaft portion 51 (D-D cross section) is a shape formed by a pair of flat walls 51s having parallelism and two circular-arc-shaped walls 51c that can be formed by cutting two opposite portions of a circle. The cross section at the position corresponding to the flare portion 53 (E-E cross section) is a shape formed by a pair of flat walls 53s having parallelism and two circular-arc-shaped walls 53c that can be formed by cutting two opposite portions of a circle. Here, the flat wall 53s is formed by an inclined surface 53pl.

[0143] It should be noted that the support portion 53p has an inclined surface 53pl that is inclined toward the outside space S side, and thus when the cylindrical body 5 is formed by injection molding, the support portion 53p can be prevented from being flipped as an undercut when the center pin of the hollow portion 50 of the cylindrical body 5 is pulled out from the intermediate space 21 side. Further, as shown in FIG. 6, the support portion 53p has an inclined surface 53p2 that is inclined toward the intermediate space 21 side at the intermediate space 21 side of the support portion 53p. Figure 28A

[0144] As shown in FIG. 6, the support portion 53p has an inclined surface 53pl that is inclined toward the outside space S side, and thus when the cylindrical body 5 is formed by injection molding, the support portion 53p can be prevented from being flipped as an undercut when the center pin of the hollow portion 50 of the cylindrical body 5 is pulled out from the intermediate space 21 side. Further, as shown in FIG. 6, the support portion 53p has an inclined surface 53p2 that is inclined toward the intermediate space 21 side at the intermediate space 21 side of the support portion 53p. Figure 26B Figure 27B As shown in FIG. 6, the front end portion (end portion of the flare portion 53) of the cylindrical body 5 is a flat surface 53e in the shape of a circular ring, and at two positions opposite in the circumferential direction, the flat surface 53e is provided with notches 53n formed by being missing.

[0145] As shown in FIG. 6, the support portion 53p has an inclined surface 53pl that is inclined toward the outside space S side, and thus when the cylindrical body 5 is formed by injection molding, the support portion 53p can be prevented from being flipped as an undercut when the center pin of the hollow portion 50 of the cylindrical body 5 is pulled out from the intermediate space 21 side. Further, as shown in FIG. 6, the support portion 53p has an inclined surface 53p2 that is inclined toward the intermediate space 21 side at the intermediate space 21 side of the support portion 53p. Figure 30A As shown in FIG. 6, the support portion 53p has an inclined surface 53pl that is inclined toward the outside space S side, and thus when the cylindrical body 5 is formed by injection molding, the support portion 53p can be prevented from being flipped as an undercut when the center pin of the hollow portion 50 of the cylindrical body 5 is pulled out from the intermediate space 21 side. Further, as shown in FIG. 6, the support portion 53p has an inclined surface 53p2 that is inclined toward the intermediate space 21 side at the intermediate space 21 side of the support portion 53p.

[0146] Figure 29B ​​​As shown, with the movable body 6 housed in the hollow portion 50 of the cylindrical body 5, on the cross section (DD section) corresponding to the shaft portion 51, the distance d1 between a pair of planar walls 51s is slightly larger than the diameter d2 of the movable body 6. The ratio (d1 / d2) of the distance d1 between the pair of planar walls 51s to the diameter d2 of the movable body 6 is preferably 1.01 to 1.20. This ratio can be 1.01, 1.02, 1.03, 1.04, 1.05, 1.06, 1.07, 1.08, 1.09, 1.10, 1.11, 1.12, 1.13, 1.14, 1.15, 1.16, 1.17, 1.18, 1.19, or 1.20, or it can be within any range of two values ​​exemplified here. It should be noted that in the embodiment shown in the figure, d1 / d2 = 1.09 (d1 = 2.600 mm, d2 = 2.381 mm). Furthermore, the ratio (d3 / d2) of the diameter d3 of the arc-shaped wall 51c to the diameter d2 of the moving body 6 is preferably 1.02 to 1.60. This ratio can be 1.02, 1.04, 1.06, 1.08, 1.10, 1.12, 1.14, 1.16, 1.18, 1.20, 1.22, 1.24, 1.26, 1.28, 1.30, 1.32, 1.34, 1.36, 1.38, 1.40, 1.42, 1.44, 1.46, 1.48, 1.50, 1.52, 1.54, 1.56, 1.58, or 1.60, or it can be within the range of any two values ​​exemplified here. It should be noted that in the embodiment shown in the figure, d3 / d2 = 1.26 (d3 = 3.000 mm, d2 = 2.381 mm). The diameter d3 is preferably larger than the distance d1. This dimensional relationship allows the movable body 6 to move vertically (perpendicular to the axis) within the cavity 50, and ensures a passage for gas flow at the gap 50g between the arc-shaped wall 51c and the movable body 6. On the other hand, as Figure 29C As shown, in the cross-section (EE section) at the position corresponding to the expansion section 53, the distance d4 between the planar walls 53s is smaller than the diameter d2 of the moving body 6, thereby enabling the moving body 6 to be held in place. However, in the EE section, a gap 50g is formed between the arc-shaped wall 53c and the moving body 6. Through the gap 50g, the gas flow is not obstructed even when the moving body 6 is held in place by the support section 53p.

[0147] Valve component 4, as described above, Figure 30AAs shown, the expanded diameter portion 53 presses against the outer air introduction hole 15 while the expanded diameter portion 53 is inserted into the intermediate space 21 to be mounted on the container main body 3. The valve member 4 is held on the housing 12 in a state where the outer peripheral surface of the shaft portion 51 is in close contact with the edge of the outer air introduction hole 15 until the engaging portion 52 is pressed into a position where it is in abutment with the outer surface of the housing 12. The outer peripheral surface of the shaft portion 51 is in close contact with the edge of the outer air introduction hole 15, so that the outflow of gas from the gap between the edge of the outer air introduction hole 15 and the cylinder body 5 into the intermediate space 21 can be suppressed when the container main body 3 is compressed.

[0148] Note that the cylinder body 5 is mounted on the container main body 3 with the outer peripheral surface of the shaft portion 51 in close contact with the edge of the outer air introduction hole 15, so the expanded diameter portion 53 is not essential. In addition, the front end of the cylinder body 5 is provided with a flat surface 53e, so even if the front end of the valve member 4 collides with the inner bag 14 when the valve member 4 is pressed into the intermediate space 21, the inner bag 14 is not easily damaged. In addition, in the present embodiment, the stop portion 52s is formed on the inner side of the engaging portion 52 that is offset to the outside space S side from the shaft portion 51, so even if the edge of the outer air introduction hole 15 presses against the shaft portion 51, the stop portion 52s is not deformed, so the passage of gas can be properly blocked.

[0149] The housing portion 17 is covered with a shrink film after the valve member 4 is mounted. At this time, the valve member 4 is mounted in a valve member mounting recess 17a provided in the housing portion 17 in such a way that the valve member 4 does not interfere with the shrink film. In addition, an air passage groove 17b is provided in a direction from the valve member mounting recess 17a to the mouth portion 9 in such a way that the valve member mounting recess 17a is not sealed by the shrink film (see FIG. 6). Figure 21 In addition, the valve member 4 according to the present embodiment is provided outside the abutting region 52a of the upper surface 52u of the cylinder body 5 and is provided with a circular ring-shaped protruding region 52p that protrudes to the outside space S side from the abutting region 52a, so the shrink film can be brought into abutment with the protruding region 52p, and the movement of the movable body 6 can be prevented from being hindered by the shrink film coming into contact with the movable body 6.

[0150] Note that, as shown in FIG. 6, the valve member 4 is provided with a circular ring-shaped protruding region 52p that protrudes to the outside space S side from the abutting region 52a of the upper surface 52u of the cylinder body 5, so the shrink film can be brought into abutment with the protruding region 52p, and the movement of the movable body 6 can be prevented from being hindered by the shrink film coming into contact with the movable body 6. Figure 30BIn the state where the mobile body 6 is engaged with the stopper 52s, the height position hi (here, based on the outer surface of the housing 12 in the state where the cylinder 5 is attached to the housing 12, the same applies hereinafter) of the valve member 4 in the direction of the outside air introduction hole 15 perpendicular to the end portion of the mobile body 6 on the outside space side is higher than the height position h2 of the adjoining region 52a of the cylinder 5 (i.e., hi > h2). That is, in the state where the mobile body 6 is engaged with the stopper 52s, a portion of the mobile body 6 is configured to fly out from the opening 52o. With such a configuration, even if the hollow portion 50 is narrow, the movement amount of the mobile body 6 can be concealed, and thus the valve member can be downsized (thinned). Further, in the state where the mobile body 6 is engaged with the stopper 52s, the height position hi in the direction of the outside air introduction hole 15 perpendicular to the end portion of the mobile body 6 on the outside space side is lower than the height position h3 of the protruding region 52p (i.e., hi < h3). With such a configuration, the mobile body 6 can be effectively prevented from coming into contact with the shrink film.

[0151] The mobile body 6 preferably has a weight of 0.0250 g or less. If the mobile body 6 is too heavy, when a compression force is applied to the housing 12 and when the compression force is released from the housing 12, the mobile body 6 cannot move quickly, and thus the dischargeability deteriorates, and there is a risk that the outside air easily flows into the inner bag 14 through the check valve 26. The weight is further preferably 0.0150 g or less, and more further preferably 0.0100 g or less. In such a case, the mobile body 6 can more easily move quickly. The weight of the mobile body 6 is preferably 0.0030 g or more. If the mobile body 6 is too light, the rigidity of the mobile body 6 easily becomes insufficient. The weight of the mobile body 6 can be specifically 0.0030, 0.0040, 0.0050, 0.0060, 0.0070, 0.0080, 0.0090, 0.0100, 0.0110, 0.0120, 0.0130, 0.0140, 0.0150, 0.0200, 0.0250 g, or a range between any two of the values exemplified here.

[0152] The material of the mobile body 6 is not particularly limited, and can be any one of resin, metal, or ceramic.

[0153] The mobile body 6 preferably has a diameter of 2.356 mm to 2.406 mm. If the mobile body 6 is too small or too large, there is a risk that the mobile body 6 cannot move smoothly. Specifically, the diameter of the mobile body 6 can be 2.356, or 2.356, 2.360, 2.365, 2.370, 2.375, 2.380, 2.385, 2.390, 2.395, 2.400, 2.405, 2.406 mm, or a range between any two of the values exemplified here.

[0154] The operation mode of the stacked peeling container 1 according to this embodiment will now be described.

[0155] First, when expelling the contents, open... Figure 21 The cover 22 exposes the pouring component 29. The container body 3 is tilted so that the pouring port 29m faces downwards, and the outer shell 12 of the container body 3 is compressed. When the outer shell 12 is compressed while gas is inside the intermediate space 21, the gas in the intermediate space 21 will enter the cavity 50 from the expansion section 53 side, such as... Figure 30B The movable body 6 is lifted so that it abuts against the stop part 52s. When the movable body 6 is engaged by the stop part 52s, the gas flow through the cavity part 50 is blocked. In this state, further compression of the outer shell 12 increases the pressure in the intermediate space 21, causing the inner bag 14 to be compressed.

[0156] When the inner bag 14 is compressed, the internal pressure of the contents inside the inner bag 14 increases, thereby pressing the cover 26b. Pressing the cover 26b causes the hinge 26c to elastically deform, causing the cover 26b to rotate around the hinge 26c. This opens the check valve 26, allowing the contents to be discharged through the pouring port 29m. When the angle α between the inner surface 26a2 of the main body 26a and the inclined surface 26b1 of the cover 26b is less than 25 degrees, the cover 26b will become embedded in the through hole 26a1, making it difficult to open the through hole 26a1. However, when the angle α is greater than 25.1 degrees, the through hole 26a1 can be opened smoothly.

[0157] Subsequently, after the required amount of contents is discharged, the container body 3 returns to its upright position and the compressive force on the outer shell 12 is released. The compressive force on the inner bag 14 is also released, thereby reducing the internal pressure of the contents inside the inner bag 14. The cover 26b and the hinge 26c return to their original shape, thereby closing the through hole 26a1 and putting the check valve 26 in a closed state.

[0158] When the compressive force on the outer casing 12 is released, the outer casing 12 will return to its original shape due to its own elasticity. As the pressure in the intermediate space 21 decreases as the outer casing 12 returns to its original shape, such as... Figure 30B As described above, a force F in the direction of the container's interior will be applied to the moving body 6 in the intermediate space 21. In this way, the moving body 6 moves towards the bottom surface of the cavity 50, forming... Figure 30A As shown, external gas is introduced into the intermediate space 21 through the gap between the walls forming the movable body 6 and the cavity 50. It should be noted that in this embodiment, a gap 50g is formed between the arc-shaped walls 51c and 53c forming the movable body 6 and the cavity 50 (see reference). Figure 29B and Figure 29C Therefore, especially after the contents are expelled, the cross-sectional area for inhaling external gas increases, thereby enhancing the resilience of the outer shell 12.

[0159] Note that if the pressure of the intermediate space 21 decreases before the through-hole 26al in the check valve 26 is closed, the outside air easily flows back into the inner bag 14 from the check valve 26. When the angle α is 25.1 degrees or more, the through-hole 26al is not easily closed, and thus the above situation easily occurs. However, in the valve member of the structure of the present embodiment, the moving body 6 moves very quickly as the pressure of the intermediate space 21 decreases, and thus the outside air introduced into the intermediate space 21 to lower the pressure of the intermediate space 21 can be prevented. Thus, the present embodiment can prevent the outside air from flowing into the inner bag 14. In the case where the moving body 6 is a ball, has a weight of 0.0250 g or less, and has a specific structure with a size of φ 2.356 mm to 2.406 mm, the outside air flowing into the inner bag 14 can be particularly effectively prevented.

[0160] Example The following examples and comparative examples mainly relate to the invention of the third aspect.

[0161] 1. Manufacture of the laminated peel container <Example 1> The laminated peel container 1 according to the above embodiment was manufactured with the angle α = 26.0 degrees, the distance dl between the pair of flat walls 51s = 2.600 mm, the diameter d2 of the moving body 6 = 2.381 mm, and the weight of the moving body 6 = 0.096 g.

[0162] <Example 2> The laminated peel container 1 was manufactured under the same conditions as in Example 1 except that the angle α was made to be 24.0 degrees.

[0163] <Example 3> The laminated peel container 1 was manufactured under the same conditions as in Example 1 except that the diameter d2 was made to be 2.350 mm without changing the material of the moving body 6 in Example 1.

[0164] <Example 4> The laminated peel container 1 was manufactured under the same conditions as in Example 1 except that the diameter d2 was made to be 2.410 mm without changing the material of the moving body 6 in Example 1.

[0165] <Example 5> The laminated peel container 1 was manufactured under the same conditions as in Example 1 except that the diameter of the moving body 6 in Example 1 was not changed and the weight was made to be 0.0542 g by changing the material.

[0166] <Comparative Example 1> In Comparative Example 1, the laminated peel container 1 was manufactured as follows: Figure 31The valve member of the shown structure is inserted into the outside air introduction hole 15, and the valve member is moved with respect to the outer case 12 to open and close the outside air introduction hole 15, and the laminate peelable container 1 is manufactured under the same conditions as in Example 1 except for this.

[0167] 2. Discharge Test The laminate peelable containers in the above examples and comparative examples were filled with water, and whether or not the contents were discharged when the outer case 12 was slightly compressed (discharge property), and whether or not the inflow of outside air into the inner bag 14 could be suppressed after the contents were discharged halfway (inflow suppression property) were confirmed. Ten samples were produced according to the examples and comparative examples, and the test was performed for each sample.

[0168] All of the samples of the container of Comparative Example 1 were poor in inflow suppression property. All of the samples of the containers of Examples 1 to 2 were excellent in discharge property and inflow suppression property, and the container of Example 1 was better in discharge property than the container of Example 2. The containers of Examples 3 to 5 had samples excellent in both discharge property and inflow suppression property, and samples poor in at least one of discharge property and inflow suppression property.

[0169] (Explanation of Reference Numerals) 1: stacked peelable container, 1a: inner bottom surface, 2: lid, 3: container main body, 3r: valve member mounting recess, 4: valve member, 5: cylinder, 6: moving body, 7: trunk, 7A: upper portion, 7B: necked portion, 7C: bottom portion, 8: shoulder, 8A: flat surface portion, 8B: curved surface portion, 8a1: bottom surface wall portion, 8a2: side wall portion, 8a3: circular wall portion, 8a4: arcuate wall portion, 8b1: bottom surface wall portion, 8b2: side wall portion, 9: mouth portion, 9A: root portion, 9B: standing portion, 9C: mounting protrusion, 9D: enlarged diameter portion, 9E: wall portion, 9F: wall portion, 9G: mouth upper end portion, 9H: shape, 9e: engagement portion, 11: outer layer, 12: outer shell, 13: inner layer, 14: inner bag, 15: outside air introduction hole, 17: housing portion, 17a: valve member mounting recess, 17b: air flow passage, 20: lid main body, 21: intermediate space, 22: lid cover, 23: hinge, 24: main lid member, 24e: screw groove, 24o: outer side cylinder portion, 2p: annular protrusion, 24t: top plate portion, 26: check valve, 26a: main body portion, 26a1: through hole, 26a2: inner surface, 26b: cover portion, 26b1: inclined surface, 26c: hinge portion, 29: pouring member, 29d: disc portion, 29e: engagement portion, 29m: mouth, 30: bottom portion, 31: central portion, 31t: top portion, 32: peripheral portion, 32b: lowest portion, 33: recessed portion, 40: protrusion, 41: tapered portion, 42: thin wall portion, 43: bent portion, 43t: most concave portion, 50: hollow portion, 50g: gap, 51: shaft portion, 51c: circular arc wall, 51s: flat wall, 52: engagement portion, 52a: abutment region, 52o: opening, 52p: protrusion region, 52s: stop portion, 52u: upper surface, 53: enlarged diameter portion, 53c: circular arc wall, 53e: flat surface, 53n: notch, 53p: support portion, 53p1: inclined surface, 53p2: inclined surface, 53s: flat wall, C container center, C1: radius of curvature, C2: radius of curvature, Cp: press lid, Cp1: lower end portion, Dr: direction, E: region, F: force, Fc: force, G: imaginary line, H: ground surface, L: imaginary line, L1: distance, L2: distance, P1: central region, P2: peripheral region, R1: 1st recessed portion, R2: 2nd recessed portion, Ra: radius of curvature, Rb: radius, Rf: reinforcing recessed portion, Rr: reinforcing recessed portion, S: outer space, S1: outer space, S2: inner space, T: support jig, a1: upper end portion, a2: intermediate portion, a3: lower end portion, b1: upper end portion, b2: intermediate portion, b3: lower end portion, d1: distance, d2: diameter, d3: diameter, d4: distance, h1: height position, h2: height position, h3: height position, a: angle.

Claims

1. A container comprising a container body having a housing portion and a protruding portion, a bottom surface of the housing portion having a central portion and a peripheral portion surrounding the central portion, the central portion being recessed with respect to the peripheral portion with a bottom portion suspended, the protruding portion being protruded downward from the central portion, an inner bottom surface being a bottom surface of an inner side of the container body is a curved shape protruding toward the inner side of the container body, in a region of the inner bottom surface corresponding to the central portion, a radius of curvature at a central region of the container body is smaller than a radius of curvature at a peripheral region surrounding the central region, the protruding portion has a curved portion curved upward in a region including a central portion of a long side direction of the protruding portion.

2. The container according to claim 1, wherein a radius of curvature of the curved portion is smaller than the radius of curvature at the peripheral region.

3. A container comprising a container body having a housing portion and a protruding portion, a bottom surface of the housing portion having a central portion and a peripheral portion surrounding the central portion, the central portion being recessed with respect to the peripheral portion with a bottom portion suspended, the protruding portion being protruded downward from the central portion, an inner bottom surface being a bottom surface of an inner side of the container body is a curved shape protruding toward the inner side of the container body, the protruding portion has a curved portion curved upward in a region including a central portion of a long side direction of the protruding portion, the protruding portion is curved upward only in the central portion of the long side direction.

4. A container comprising a container body and a lid, the container body having a mouth portion, the mouth portion having a standing portion, a diameter expanding portion, a wall portion, a mounting protrusion, a front end tapered wall portion, and a mouth upper end portion, the diameter expanding portion extending in a direction substantially perpendicular to a central axis of the container body, an inner side portion of the diameter expanding portion being connected to the standing portion, an outer side portion of the diameter expanding portion being connected to the wall portion, the wall portion extending to rise upward, an upper end portion of the wall portion being connected to the mounting protrusion, the mounting protrusion being a portion where the lid is mounted, an outer diameter of the mounting protrusion being the largest among outer diameters of the mouth portion, the front end tapered wall portion being formed such that a portion from the mounting protrusion side to the mouth upper end portion side is tapered toward a front end.

5. The container according to claim 4, wherein an outer diameter of a lower end portion of the wall portion is larger than an outer diameter of the upper end portion of the wall portion.

6. The container according to claim 4, wherein the mounting protrusion has a portion parallel to the central axis of the container body.

7. The container according to claim 4, wherein the front end tapered wall portion is curved so as to protrude toward an outer side of the container body.

8. A container comprising a container body having a housing portion, a bottom surface of the housing portion having a central portion and a peripheral portion surrounding the central portion, the central portion being recessed with respect to the peripheral portion with a bottom portion suspended, a groove portion connected to the central portion being provided in the peripheral portion, the groove portion being provided on an extension line of a long side direction of the protruding portion.

9. A container comprising a container body having a housing portion and a protruding portion, a bottom surface of the housing portion having a central portion and a peripheral portion surrounding the central portion, the central portion being recessed with respect to the peripheral portion and having a bottom portion suspended, the protruding portion being protruded downward from the central portion, the protruding portion having a curved portion curved upward in a region including a central portion of a long side direction of a lower end of the protruding portion, the container body having an outer bag and an inner bag, and the inner bag being contracted as contents are reduced, the inner bag being tapered toward a front end in the protruding portion.

10. The container according to claim 9, wherein the inner bag is tapered toward a front end in the entire protruding portion.

11. The container according to claim 9 or 10, wherein the inner bag extends straight toward a front end in the protruding portion.

12. A container comprising a container body having a housing portion and a protruding portion, a bottom surface of the housing portion having a central portion and a peripheral portion surrounding the central portion, the central portion being recessed with respect to the peripheral portion and having a bottom portion suspended, the protruding portion being protruded downward from the central portion, the protruding portion having a curved portion curved upward in a region including a central portion of a long side direction of a lower end of the protruding portion, the container body having an outer bag and an inner bag, and the inner bag being contracted as contents are reduced, the inner bag extending straight toward a front end in the protruding portion.

13. A container comprising a container body having a housing portion and a protruding portion, a bottom surface of the housing portion having a central portion and a peripheral portion surrounding the central portion, the central portion being recessed with respect to the peripheral portion and having a bottom portion suspended, the protruding portion being protruded downward from the central portion, the protruding portion having a curved portion curved upward in a region including a central portion of a long side direction of a lower end of the protruding portion, the container body having an outer bag and an inner bag, and the inner bag being contracted as contents are reduced, the inner bag not being curved in the protruding portion.

14. A container comprising a container body having a housing portion and a protruding portion, a bottom surface of the housing portion having a central portion and a peripheral portion surrounding the central portion, the central portion being recessed with respect to the peripheral portion and having a bottom portion suspended, the protruding portion being protruded downward from the central portion, the protruding portion having a curved portion curved upward in a region including a central portion of a long side direction of a lower end of the protruding portion, the protruding portion being a symmetrical shape with respect to a central plane parallel to the long side direction of the protruding portion.

15. The container according to claim 14, wherein the container body having an outer bag and an inner bag, and the inner bag being contracted as contents are reduced, the outer bag and the inner bag being symmetrical shapes with respect to the central plane, respectively.

16. A container comprising a container body having a housing portion and a protruding portion, a bottom surface of the housing portion having a central portion and a peripheral portion surrounding the central portion, The central portion is recessed with respect to the peripheral portion and has a bottom that is suspended, The protruding portion is configured to protrude downward from the central portion, The protruding portion has a curved portion that is curved upward in a region that is in the center of the long side direction of the protruding portion including the lower end of the protruding portion, The protruding portion is symmetric with respect to a central plane that is perpendicular to the long side direction of the protruding portion.

17. The container according to claim 16, wherein The container body is configured to have an outer bag and an inner bag, and the inner bag shrinks as the contents decrease, The outer bag and the inner bag are respectively symmetric with respect to the central plane.

18. A container having a container body with a housing portion and a protruding portion, The bottom surface of the housing portion has a central portion and a peripheral portion surrounding the central portion, The central portion is recessed with respect to the peripheral portion and has a bottom that is suspended, The protruding portion is configured to protrude downward from the central portion, The protruding portion is configured to have a curved portion that is curved upward in a region that is in the center of the long side direction of the protruding portion including the lower end of the protruding portion, The container body is configured to have an outer bag and an inner bag, and the inner bag shrinks as the contents decrease, A valve member is provided in the housing portion, and the valve member is configured to adjust the air exchange between an intermediate space between the outer bag and the inner bag and an outer space.

19. The container according to claim 18, wherein The valve member is disposed in a recess provided in the housing portion.

20. A container having a container body with a housing portion and a protruding portion, The bottom surface of the housing portion has a central portion and a peripheral portion surrounding the central portion, The central portion is recessed with respect to the peripheral portion and has a bottom that is suspended, The protruding portion is configured to protrude downward from the central portion, The protruding portion is configured to have a curved portion that is curved upward in a region that is in the center of the long side direction of the protruding portion including the lower end of the protruding portion, The container body is configured to have an outer bag and an inner bag, and the inner bag shrinks as the contents decrease, In the protruding portion, a portion where a laminated type blank is cut is provided across the entire protruding portion.

21. A container having a housing portion and a protruding portion, wherein The bottom surface of the housing portion has a central portion and a peripheral portion surrounding the central portion, The central portion is recessed with respect to the peripheral portion and has a bottom that is suspended, The protruding portion is configured to protrude downward from the central portion, The protruding portion has a curved portion that is curved upward in a region that is in the center of the long side direction of the protruding portion including the lower end of the protruding portion.

22. The container according to claim 21, wherein The lower end of the protruding portion is located closer to the upper side than the ground surface of the peripheral portion.

23. The container according to claim 22, wherein The ratio of the distance from the top to the most recessed concave portion of the curved portion to the distance from the top of the most suspended bottom of the central portion to the ground surface is 0.75 to 0.

99.

24. The container according to any one of claims 21 to 23, wherein The container is configured to have an outer bag and an inner bag, and the inner bag shrinks as the contents decrease.

25. The container according to claim 24, wherein In the protruding portion, the outer layer constituting the outer bag and the inner layer constituting the inner bag are respectively arranged at positions symmetrical with respect to a plane defined by the long side direction and the up-down direction of the protruding portion.

26. The container according to claim 25, wherein The protruding portion has a tapered portion whose cross section perpendicular to the long side direction is tapered from the bottom surface toward the lower end.

27. The container according to claim 26, wherein The container has a thin-walled portion, The thin-walled portion is formed at a position on the lower end side of the tapered portion and is a shape thinner in thickness than the tapered portion.

28. The container according to any one of claims 21 to 27, wherein An inner bottom surface that is a bottom surface on an inner side of the container is a curved shape that protrudes toward the inner side of the container, A radius of curvature at a central region of the container of the inner bottom surface is smaller than a radius of curvature at a surrounding region located around the central region.

29. A container having a housing portion and a protruding portion, wherein A bottom surface of the housing portion has a central portion and a peripheral portion surrounding the central portion, The central portion is recessed with respect to the peripheral portion with a bottom portion hanging, The protruding portion is configured to protrude downward from the central portion, An inner bottom surface that is a bottom surface on an inner side of the container is a curved shape that protrudes toward the inner side of the container, A radius of curvature at a central region of the container of the inner bottom surface is smaller than a radius of curvature at a surrounding region located around the central region.

30. A laminated peelable container having a container body having an outer bag and an inner bag, wherein The container body has a trunk portion, a shoulder portion, and a mouth portion, The trunk portion is formed in a bottomed cylindrical shape, and the trunk portion is connected to the shoulder portion, The shoulder portion has a flat surface portion and a reinforcing recess portion, and the flat surface portion is connected to the mouth portion, The reinforcing recess portion is recessed in a direction from the outer bag side toward the inner bag side, and the reinforcing recess portion extends from the flat surface portion side toward a position hidden by the mouth portion when the container body is viewed from above.

31. The laminated peelable container according to claim 30, wherein The mouth portion has a root portion, and the root portion is formed in a shape protruding on the flat surface portion, The reinforcing recess portion reaches the root portion from the flat surface portion side.

32. The laminated peelable container according to claim 30 or 31, wherein The shoulder portion protrudes in a manner protruding in a direction from an inner space side of the container body toward an outer space side of the container body.

33. The laminated peelable container according to any one of claims 30 to 32, wherein A first reinforcing recess portion and a second reinforcing recess portion corresponding to the reinforcing recess portion are formed in the shoulder portion, The first reinforcing recess portion and the second reinforcing recess portion are arranged so as to be 180 degrees with reference to a central axis of the shoulder portion.

34. The laminated peelable container according to claim 31, wherein The reinforcing recess portion has a bottom surface wall portion, a first side wall portion, and a second side wall portion, The first side wall portion and the second side wall portion are respectively provided at one side end and the other side end of the bottom surface wall portion, The bottom wall portion, the first side wall portion, and the second side wall portion reach the root portion.

35. The stacked container of claim 34, wherein, An angle of inclination of the bottom wall portion is constant from the flat face portion side to the root portion.

36. The stacked container of any one of claims 30 to 33, wherein, The shoulder portion further has a curved portion, The curved portion is formed in a cylindrical shape, and the curved portion is connected to the flat face portion and the trunk portion.

37. A stacked container comprising a lid, a container main body, and a valve member, wherein The container main body has an outer shell and an inner bag, and is configured so that the inner bag shrinks as contents decrease, The container main body has a mouth portion that discharges the contents, and an air inlet hole that communicates an intermediate space between the outer shell and the inner bag with an external space, The lid is attached to the mouth portion, and has a check valve, The check valve has a cylindrical main body portion having a through hole, and a lid portion configured to open and close the through hole, The lid portion has an inclined surface that abuts against an edge of the through hole to close the through hole, The main body portion and the lid portion are connected by a hinge portion, and the lid portion is configured to rotate about the hinge portion to open the through hole, The valve member has a cylinder and a moving body, The cylinder has a hollow portion configured to communicate the intermediate space with the external space, The moving body is housed so as to be movable in the hollow portion, The cylinder has a stopper portion that engages with the moving body and blocks the flow of air through the hollow portion when the moving body moves toward the external space.

38. The stacked container of claim 37, wherein An angle between an inner surface of the main body portion and the inclined surface is 25.1 degrees or more.

39. The stacked container of claim 37 or 38, wherein The moving body is spherical.

40. The stacked container of any one of claims 37 to 39, wherein A weight of the moving body is 0.0250 g or less.

41. The stacked container of claim 40, wherein The weight of the moving body is 0.0150 g or less.

42. The stacked container of any one of claims 37 to 41, wherein A diameter of the moving body is 2.356 mm to 2.406 mm.

Images