TW202000536A - container - Google Patents

Abstract

Provided is a container in which the occurrence of cracking at a lower end of a projecting part can be reduced. According to the present invention, provided is a container provided with: a storage part; and a projecting part. The bottom surface of the storage part is provided with a central section and a peripheral section surrounding the central section. The central section is configured to form a raised bottom by being recessed relative to the peripheral section. The projecting part is configured to project downward from the central section. The projecting part is provided with, in a region including a longitudinal center of the lower end thereof, a curved section which is curved upward.

Description

Container

The invention relates to a container.

(Point 1)

Conventionally, a container manufactured by direct blow molding using a cylindrical parison is known. For example, Patent Document 1 discloses a laminated peel container having an outer shell and an inner bag, and the inner bag shrinks as the content decreases.

(Viewpoint 2)

As disclosed in Patent Document 2, various structures are proposed in which a container body of a laminated peel container is provided with a cylindrical trunk portion having a bottom, a cylindrical shoulder portion connected to the trunk portion, and a cylindrical mouth portion connected to the shoulder portion . The container body of the laminated peel container is manufactured by forming the parison into a cylindrical shape with a mold. An outer shell and an inner bag provided inside the outer shell are formed on the container body of the laminated peel container. The contents are accommodated in the inner bag, and when the user compresses and stacks the peeling container to discharge the contents of the inner bag, air enters the outer shell and the inner bag, and the inner bag peels off from the inner surface of the outer shell.

(Viewpoint 3)

Patent Document 3 discloses a check valve configured to open and close a through-hole of a cylindrical body with a lid. The cover portion is connected to the main body portion through a hinge portion, and the cover portion is rotated at the hinge portion to open and close the through hole.

【Advanced technical documents】

【Patent Document】

Patent Document 1: Japanese Patent No. 3401519

Patent Document 2: Japanese Patent Laid-Open No. 2016-117507

Patent Document 3: Japanese Patent Laid-Open No. 2012-106800

(Point 1)

At the bottom of such a container, a protruding portion formed when fusing the laminated parison end is provided, but when subjected to an impact such as dropping, the stress is concentrated at the central portion in the longitudinal direction near the lower end of the protruding portion, so there may be cracks risk.

The present invention has been completed in view of the above circumstances, and provides a laminated peel container capable of suppressing cracking at the lower end of the protruding portion, particularly at the central portion in the longitudinal direction.

(Viewpoint 2)

Since the mouth protrudes from the shoulder and the diameter of the mouth is smaller than the diameter of the shoulder, the portion where the mouth and the shoulder are connected may be deformed. For example, when an external force is applied to the mouth, the mouth may bend toward the shoulder and recede. Examples of the case where an external force is applied to the mouth include, for example, a case where an article is placed on the layered peeling container when the layered peeling container is carried, and a case where the layered peeling container drops and the mouth collides with the ground.

The present invention has been made in view of the above circumstances, and provides a laminated peeling container capable of suppressing the mouth portion from bending and retracting toward the shoulder side.

(Viewpoint 3)

The present inventor found that when the check valve of Patent Document 3 is used on the stacked peeling container, there may be a case where the check valve does not work properly, causing outside air to enter the inner bag after the contents are discharged.

The present invention has been completed in view of the above circumstances, and provides a laminated peeling container capable of suppressing entry of outside air into an inner bag.

(Point 1)

According to the present invention, there is provided a container which is provided with a storage portion and a protruding portion. The bottom surface of the housing portion includes a central portion and a peripheral portion surrounding the central portion, the central portion is configured to be recessed relative to the peripheral portion and the bottom rises, and the protruding portion is configured to be downward from the central portion Protruding, the protruding portion includes a curved portion curved upward in a region including the center of the lower end in the longitudinal direction.

The inventors have conducted intensive research and found that by bending the region including the lower end of the protruding portion in the center of the longitudinal direction upward, it is possible to alleviate the stress concentration on the central portion in the longitudinal direction when receiving an impact due to a fall or the like, thereby suppressing the occurrence Cracked.

Hereinafter, various embodiments of the present invention will be exemplified. The embodiments shown below can be combined with each other.

Preferably, the lower end of the protruding portion is located above the ground surface of the peripheral portion.

It is preferable that the ratio of the distance from the top part formed from the bottommost surface of the central part to the most concave most concave part of the curved part to the distance from the top part to the ground plane is 0.75 to 0.99.

Preferably, the container is configured to have an outer shell and an inner bag, and the inner bag shrinks as the content decreases.

Preferably, in the protruding portion, the outer layer constituting the outer shell and the inner layer constituting the inner bag are arranged at positions symmetrical to the plane defined by the longitudinal direction of the protruding portion and the vertical direction.

Preferably, the protruding portion includes a tapered portion, and the tapered portion has a cross-section perpendicular to the longitudinal direction, and has a tapered shape from the bottom to the lower end.

It is preferable to include a thin portion formed at a position on the lower end side of the tapered portion and having a thinner thickness than the tapered portion.

It is preferable that the container, wherein the inner bottom surface of the inner bottom surface of the container is a curved shape 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 larger than that around the central region The radius of curvature at the surrounding area is small.

A container comprising a container portion and a protruding portion. Preferably, the bottom surface of the container portion includes a central portion and a peripheral portion surrounding the central portion. The central portion is configured to be recessed relative to the peripheral portion and have a bottom Ascending, the protruding portion is configured to protrude downward from the central portion, the inner bottom surface of the inner bottom surface of the container is a curved shape convex toward the inner side of the container, and the inner bottom surface is located at the center of the container The radius of curvature of the area is smaller than the radius of curvature at the surrounding area around the central area.

(Viewpoint 2)

According to the present invention, there is provided a laminated peel container including a container body having an outer shell and an inner bag, wherein the container body has a trunk portion, a shoulder portion, and a mouth portion, and the trunk portion is formed with a bottom A cylindrical shape, and the torso portion is connected to the shoulder portion, the shoulder portion has a flat face portion and a reinforced concave portion, and the flat face portion is connected to the mouth portion, the reinforced concave portion extends from the housing side to the The direction of the inner bag side is recessed, and the reinforcing recess extends from the flat surface side toward the position hidden in the mouth when viewed from the upper surface of the container body.

According to the laminated peel container according to the present invention, the reinforced concave portion extends from the flat face side to the position hidden in the mouth when the container body is viewed from the upper surface. As a result, the reinforced concave portion is closer to the portion where the mouth and the shoulder are connected, As a result, it is possible to suppress the mouth portion from retreating to the shoulder side.

Hereinafter, various embodiments of the present invention will be exemplified. The embodiments shown below can be combined with each other.

Provided is a laminated peeling container, preferably the mouth portion has a root portion, and the root portion is formed to swell on the flat surface portion, and the reinforcing concave portion reaches the root portion from the flat surface portion side.

Provided is a laminated peel container, and it is preferable that the shoulder protrudes in a direction protruding from the inner space side of the container body to the outer space side of the container body.

Provided is a laminated peeling container, preferably a first reinforced concave portion and a second reinforced concave portion corresponding to the reinforced concave portion are formed on the shoulder portion, the first reinforced concave portion and the second reinforced concave portion are arranged such that the central axis of the shoulder portion It is 180 degrees from the reference.

Provided is a laminated peeling container, preferably, the reinforcing concave portion has a bottom wall portion, a first side wall portion, and a second side wall portion, and the first side wall portion and the second side wall portion are respectively provided on one side end of the bottom surface wall portion and the other One side end, the bottom wall portion. The first side wall portion and the second side wall portion reach the root portion.

Provided is a laminated peeling container, preferably, the inclination angle of the bottom wall portion is constant from the flat surface side to the root portion.

Provided is a laminated peel container. 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 and the flat surface portion are connected to the trunk portion.

(Viewpoint 3)

According to the present invention, there is provided a laminated peel container including a lid, a container body, and a valve member. The container body has an outer shell and an inner bag, and the inner bag shrinks as the content decreases. The container body includes a mouth portion for discharging the contents, an outside air introduction hole that connects an intermediate space between the outer casing and the inner bag and an outer space, and the lid is mounted on the mouth portion and has a non-return A valve, the check valve includes a cylindrical body portion having a through hole, and a cover portion configured to open and close the through hole, and the cover portion includes an abutment with an edge of the through hole to close the through hole The inclined surface of the hole, the body portion and the cover portion are connected by a hinge portion, and the cover portion is configured to rotate around the hinge portion to open the through hole, and the valve member is provided with a cylinder and a movement The body has a hollow portion, the hollow portion is provided so that the intermediate space communicates with the external space, the moving body is accommodated to be movable within the hollow portion, and the cylindrical body has a stopper portion, When the moving body moves to the external space, the stopper engages with the moving body and blocks air flow through the cavity.

The present inventors found through deep research how to suppress the inflow of outside air into the inner bag: a method of suppressing the inflow of outside air into the inner bag when the valve member of a specific structure is relatively easily mounted on the main body.

Hereinafter, various embodiments of the present invention will be exemplified. The embodiments shown below can be combined with each other.

In a laminated peel container, it is preferable that the angle between the inner surface of the main body portion and the inclined surface is 25.1 degrees or more.

In a stacked peeling container, it is preferable that the moving body is spherical.

In a layered peeling container, the weight of the moving body is preferably 0.0250 g or less.

In a layered peeling container, the weight of the moving body is preferably 0.0150 g or less.

For a layered peeling container, the diameter of the moving body is preferably 2.356 mm to 2.406 mm.

1‧‧‧Lamination peeling container

1a‧‧‧Inner bottom

2‧‧‧ cover

3‧‧‧Container body

3r‧‧‧Valve parts installation recess

4‧‧‧Valve parts

5‧‧‧Cylinder

6‧‧‧Mobile

7‧‧‧ Torso

7A‧‧‧Upper

7B‧‧‧Shrink neck

7C‧‧‧Bottom

8‧‧‧ shoulder

8A‧‧‧Flat face

8B‧‧‧Curved part

8a1‧‧‧Bottom wall

8a2‧‧‧Side wall part

8a3‧‧‧round wall

8a4‧‧‧arc wall

8b1‧‧‧Bottom wall

8b2‧‧‧Side wall part

9‧‧‧ Mouth

9A‧‧‧Root

9B‧‧‧Standing Department

9C‧‧‧Installation convex part

9D‧‧‧Expansion Department

9E‧‧‧Wall

9F‧‧‧Wall

9G‧‧‧ mouth upper end

9H‧‧‧shape

9e‧‧‧Joint Department

11‧‧‧Outer

12‧‧‧Housing

13‧‧‧Inner layer

14‧‧‧Inner bag

15‧‧‧Outer air introduction hole

17‧‧‧ Containment Department

17a‧‧‧Valve component mounting recess

17b‧‧‧Air circulation slot

20‧‧‧Cover body

21‧‧‧Intermediate space

22‧‧‧ Cover

23‧‧‧Hinges

24‧‧‧Main cover parts

24e‧‧‧Thread groove

24o‧‧‧Outer tube

2p‧‧‧ring protrusion

24t‧‧‧Top Board Department

26‧‧‧Check valve

26a‧‧‧Main part

26a1‧‧‧Through hole

26a2‧‧‧Inside

26b‧‧‧Cover

26b1‧‧‧inclined surface

26c‧‧‧Hinge Department

29‧‧‧Parts

29d‧‧‧Disc Department

29e‧‧‧Joint Department

29m‧‧‧ mouth

30‧‧‧Bottom

31‧‧‧Central Department

31t‧‧‧Top

32‧‧‧Peripheral Department

32b‧‧‧The lowest part

33‧‧‧Notch

40‧‧‧Projection

41‧‧‧Cone

42‧‧‧Thin Wall

43‧‧‧Bend

43t‧‧‧The most concave part

50‧‧‧Empty Department

50g‧‧‧ gap

51‧‧‧Shaft

51c‧‧‧Circular wall

51s‧‧‧Plane wall

52‧‧‧Joint Department

52a‧‧‧adjacent area

52o‧‧‧ opening

52p‧‧‧ Highlighted area

52s‧‧‧stop

52u‧‧‧upper surface

53‧‧‧Expansion Department

53c‧‧‧Circular wall

53e‧‧‧flat surface

53n‧‧‧Notch

53p‧‧‧Support

53p1‧‧‧inclined surface

53p2‧‧‧inclined surface

53s‧‧‧Plane wall

C‧‧‧Container center

C1‧‧‧ radius of curvature

C2‧‧‧ radius of curvature

Cp‧‧‧Press cover

Cp1‧‧‧Lower end

Dr‧‧‧ direction

E‧‧‧Region

F‧‧‧force

Fc‧‧‧force

G‧‧‧Imaginary line

H‧‧‧Ground

L‧‧‧Imaginary line

L1‧‧‧Distance

L2‧‧‧Distance

P1‧‧‧Central area

P2‧‧‧ Surrounding area

R1‧‧‧First recess

R2‧‧‧Second recess

Ra‧‧‧ radius of curvature

Rb‧‧‧radius

Rf‧‧‧Enhanced concave

Rr‧‧‧Enhanced concave

S‧‧‧External space

S1‧‧‧External space

S2‧‧‧Internal space

T‧‧‧Support fixture

a1‧‧‧Upper end

a2‧‧‧Middle

a3‧‧‧Lower end

b1‧‧‧Upper end

b2‧‧‧ Middle

b3‧‧‧Lower end

d1‧‧‧Distance

d2‧‧‧Diameter

d3‧‧‧Diameter

d4‧‧‧Distance

h1‧‧‧ height position

h2‧‧‧Altitude position

h3‧‧‧Altitude position

α‧‧‧Angle

FIG. 1 is a perspective view of the laminated peeling container 1 according to the first embodiment of the first aspect of the present invention.

FIG. 2 is a cross-sectional view of a region including the valve member 4 of the laminated peel container 1 in FIG. 1.

FIG. 3 is a perspective view of a region including the bottom 30 of the laminated peeling container 1 of FIG. 1.

FIG. 4 is a bottom view of the laminated peeling container 1 of FIG. 1.

5A is an A-A cross-sectional view in FIG. 4, FIG. 5B is a B-B cross-sectional view in FIG. 4, and FIG. 5C is an enlarged view of a main structure of the cross-sectional view in FIG. 5B.

6 is a partially enlarged cross-sectional view of area E of FIG. 5A.

7A is a diagram for explaining the shape of the lower end of the conventional protrusion, and FIG. 7B is a diagram focusing on the shape of the lower end of the protrusion 40 of the laminated peeling container 1 of the present invention.

FIG. 8A is a diagram showing the shape of a protrusion according to a modification of the present invention, and FIG. 7B is a diagram showing the shape of a protrusion according to another modification of the present invention.

9 is a perspective view of a region including the bottom 30 of the laminated peeling container 1 according to the second embodiment of the first aspect of the present invention.

Fig. 10 is a bottom view of Fig. 9.

Fig. 11 is a cross-sectional view taken along line A-A in Fig. 10.

12A is a cross-sectional view taken along line B-B in FIG. 10, and FIG. 12B is an enlarged view of area B in FIG. 12A.

13A to 13C are respectively a front view of the laminated peeling container 1 according to the embodiment of the second viewpoint, a perspective view showing the front, and a diagram showing the upper surface.

FIG. 14 is an enlarged view of the laminated peeling container 1 shown in FIG. 13B.

15A to 15B are respectively a rear view and a perspective view showing the rear of the laminated peeling container 1 of FIG. 13A.

FIG. 16 is an enlarged view of the laminated peeling container 1 shown in FIG. 15B.

Fig. 17A is a cross-sectional view taken along line A-A shown in Fig. 13C, and Fig. 17B is an enlarged view of the mouth portion 9 shown in Fig. 17A and its surroundings, showing a state in which the cap Cp is attached to the mouth portion 9.

Fig. 18 is a sectional view taken along line B-B shown in Fig. 13C.

19A is a cross-sectional view taken along line C-C shown in FIG. 17A, and FIG. 19B is an enlarged view of the four-corner area B shown in FIG. 19A.

FIG. 20A is an A-A end view shown in FIG. 17A, and FIG. 20B is an B-B end view shown in FIG. 17A.

FIG. 21 is a front view of the laminated peeling container 1 according to an embodiment of the third aspect of the present invention.

22 is a cross-sectional view showing a main part including the lid 2 and the valve member 4 of the laminated peeling container 1 of FIG. 21.

FIG. 23 is an enlarged view of the cover 2 of FIG. 22.

FIG. 24 shows the check valve 26 of FIG. 23, FIG. 24A is a perspective view, and FIG. 24B is a perspective view showing the same cross section as FIG.

FIG. 25 is a cross-sectional view of the check valve 26 at the same cross-section as FIG. 23, FIG. 25A is a closed state, and FIG. 25B is an open state.

FIG. 26A is a perspective view when the valve member 4 of FIG. 22 is viewed from above, and FIG. 26B is a perspective view when the valve member 4 is viewed from below.

27A is a plan view of the valve member 4 of FIG. 22, and FIG. 27B is a bottom view of the valve member 4.

FIG. 28A is a cross-sectional view taken along the line A-A in FIG. 27A, and FIG. 28B is a cross-sectional view taken along the line B-B in FIG. 27A.

FIGS. 29A to 29C are end views showing cross sections taken along lines C-C, D-D, and E-E in FIGS. 28A and 28B, respectively.

30A is a cross-sectional view showing a state where the valve member 4 is attached to the housing 12, and FIG. 30B is a cross-sectional view showing a state where the movable body 6 abuts on the stopper 52s to close the cavity 50.

31 is a perspective view showing the structure of a valve member of Comparative Example 1. FIG.

The embodiments of the present invention will be described below. The various technical features shown in the embodiments illustrated below can be combined with each other. And each technical feature can independently complete the present invention.

(Embodiment of the first viewpoint)

1. The first embodiment of the first viewpoint

1-1. Overall structure

As shown in FIG. 1, the laminated peeling container 1 according to the first embodiment of the first aspect of the present invention includes a bottomed substantially cylindrical container body 3 and a valve member 4. The container body 3 includes a storage portion 17 for storing the content and a mouth portion 9 for discharging the content from the storage portion 17.

As shown in FIG. 2, the container body 3 includes an outer layer 11 and an inner layer 13 in the accommodating portion 17 and the mouth portion 9, the outer layer 11 constitutes the outer shell 12, and the inner layer 13 constitutes the inner bag 14. As the content decreases, the inner layer 13 peels off from the outer layer 11, so that the inner bag 14 peels off from the outer shell 12 and shrinks.

The mouth portion 9 is provided with an engaging portion 9e that can be engaged with a cover (not shown) with a check valve. The cover can be gland-type or threaded.

As shown in FIG. 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 in and out between the intermediate space between the outer casing 12 and the inner bag 14 and the outer space. The valve member 4 according to the present embodiment is configured to close the outside air introduction hole 15 to compress the inner bag 14 when the casing 12 is compressed, and to introduce outside air into the intermediate space when the compression force on the casing 12 is released.

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 mounted on the valve member mounting recess 3r provided in the housing portion 17 so that the valve member 4 does not interfere with the shrink film.

1-2. Structure of bottom 30

Next, the area near the bottom 30 of the housing portion 17 according to this embodiment will be described using FIGS. 3 to 6. It should be noted that the outer layer 11 and the inner layer 13 are not distinguished in the cross-sectional views of FIGS. 5A and 5B.

As shown in FIGS. 3 and 4, the bottom 30 of the housing portion 17 includes 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 into the container inner side than the peripheral portion 32 and is a convex bottom. In addition, a protruding portion 40 protruding downward from the bottom surface is formed in the central portion 31.

As shown in the enlarged cross-sectional view of the region E in FIG. 5A (that is, FIG. 6 ), the protruding portion 40 includes a tapered portion 41 and a thin portion 42. As shown in FIG. 6, the tapered portion 41 has a cross-sectional shape perpendicular to the longitudinal direction and has a tapered shape from the bottom to the front end. The thin portion 42 is formed at the lower end side of the tapered portion 41 and is thinner than the tapered portion 41. The cross-sectional shape of the thin portion 42 is a rectangle whose long side is a direction perpendicular to the bottom surface (see FIG. 6 ). As shown in FIGS. 3 and 5B, the protruding portion 40 is formed to extend across the entire bottom portion 30 in the longitudinal direction (left-right direction in FIG. 5B). Therefore, a portion of the peripheral portion 32 is the groove portion 33 (see FIG. 3 ), and the central portion 31 is connected to the groove portion 33 at this portion.

It should be noted that the protruding portion 40 protrudes from the central portion 31 and the groove portion 33 protruding upward from the bottom of the peripheral portion 32, so it does not protrude further from the ground plane H defined by the peripheral portion 32 (see FIG. 5A). The thin portion 42 is located above the ground plane H.

As shown in the enlarged explanatory diagrams (end views) of FIGS. 5B and 7B, the protrusion 40 according to the present embodiment includes an upward portion (container) in a region including the lower end (the lower end of the thin portion 42) of the central portion in the longitudinal direction Inner direction) The curved portion 43 slightly curved. In other words, the central portion of the lower end of the protruding portion 40 in the longitudinal direction is recessed upward. This content will be described later.

1-3. Forming

The stacked peeling container 1 according to this embodiment is formed by blow molding using a laminated parison. At this time, the laminated parison is pinched off at the lower end of the protruding portion 40 (the lower end of the thin portion 42). That is, the portion of the laminated parison pinched by the mold defines the shape of the lower end of the protrusion 40.

When the mold is closed during blow molding, 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 thin. Therefore, the ratio of the inner layer 13 relative to the outer layer 11 at the protruding portion 40 is greater than other parts of the bottom 30 or the container body The side surface of 3, etc., and the ratio of the inner layer 13 at other positions are small. Therefore, as shown in FIG. 6, the outer layers 11 are welded to each other in at least a part of the lower end portion of the protruding portion 40, that is, the left and right outer layers 11 across the sealing portion are directly welded together without passing through the inner layer 13. With such a structure, as compared with a structure in which the entire outer layer 11 is welded together by the inner layer 13 at the protruding portion 40, the welding force of the pinch-off portion is improved, and the impact resistance can be improved.

It should be noted that the protruding portion 40 according to this embodiment has a structure where the lower end portion does not bend. Therefore, as shown in FIG. 6, at the protruding portion 40, the outer layer 11 constituting the outer shell 12 and the inner layer 13 constituting the inner bag 14 are arranged on a plane defined by the BB line in FIG. 4 (that is, the protruding portion The long-side direction and the plane defined by the up-down direction are symmetrical.

1-4. Shape of the lower end of the protrusion 40

In a container having a protruding portion at the bottom formed by blow molding or the like in the past, as shown in the end view of FIG. 7A, the lower end of the protruding portion is formed linearly across the longitudinal direction. This is because the shape of the mold is limited, and the sealing area of the sealed laminated parison is kept above the ground plane H (see FIG. 5C) as much as possible. As a result, the lower end of the protruding portion is a linear container, and a phenomenon in which the protruding portion is cracked due to the impact of falling or the like occurs.

However, the present inventors conducted a drop test of the stacked peeling container in a state filled with contents, and photographed with a camera to observe the deformation process of the bottom part at the moment of impact. As a result, it was found that, after being impacted, the central part of the bottom would immediately and instantaneously turn over to protrude downward. Thereby, the stress in the tensile direction is concentrated on the central portion in the longitudinal direction of the lower end of the protruding portion, and cracks perpendicular to the longitudinal direction (that is, the short-side direction) occur in the portion.

Based on this phenomenon, the present inventors completed the present invention with a structure provided with a bent portion 43, as shown in FIG. 5B and FIG. 7B, the center portion of the lower end of the protruding portion 40 in the longitudinal direction is upward (inner direction of the container) )bending.

It should be noted that the configuration in which the bent portion 43 is provided in such a protruding portion 40 only needs to bend the shape of the pinch-off portion of the mold. Simply changing the shape of the mold in this way, in other words, the protruding portion 40 does not need to be processed to suppress cracking after other mold closing, that is, cracking can be suppressed. Due to such a simple structure, the side surface (the surface shown in FIG. 5B) of the protruding portion 40 according to this embodiment has a flat shape corresponding to the shape of the mold.

The curved portion 43 only needs to be slightly curved, and it is preferable that the area due to the bending decreases and becomes smaller. This is because if the protruding portion 40 is too bent, it will form an excessively concave shape, 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, especially for cracks in the longitudinal direction The impact resistance will be deteriorated (it should be noted that FIG. 7B is a diagram after focusing on bending, not showing the correct shape).

As shown in FIG. 5C, in the curved portion 43 according to the present embodiment, the distance from the top 31t of the bottom surface of the central portion 31 to the ground surface H is L2, and the maximum depression from the top 31t to the curved portion 43 is the largest. The distance of the concave portion 43t is L1, and the ratio X1 (=L1/L2) of the L1 to the 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 may specifically be such as 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 may be in the range between any two of the numerical values exemplified here.

The curved portion 43 of the protruding portion 40 according to the present embodiment has an arc shape when viewed from the side as shown in FIG. 5B, and the radius of curvature Ra of the curved portion 43 shown in FIG. 5C is lower than that of the bottom portion 30 shown in FIG. 5C. The radius Rb is large. Specifically, the ratio X2 (=R1/R2) of the curvature radius Ra of the curved portion 43 with respect to the radius Rb of the bottom portion 30 is preferably 3.0 or more. The ratio X2 is more preferably 4.0 or more, further preferably 5.0 to 10, still 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 may be within the range between any two of the numerical values exemplified here.

1-5. Effect

Since the central portion of the lower end of the protruding portion 40 of the stacked peeling container 1 according to the present embodiment is bent upward, when the central portion 31 of the bottom portion 30 protrudes (expands) downward from the bottom surface, the long side of the lower end of the protruding portion 40 The stress in the longitudinal direction at the central portion of the direction is not applied in the tensile direction but in the compression direction. Therefore, cracking in the short side direction at the central portion can be suppressed.

In addition, by slightly bending the bent portion 43, it is possible to suppress cracking in the short side direction at the central portion, and to secure a sealing area at the protruding portion 40 and suppress cracking in the long side direction.

In addition, by bending the central portion in the longitudinal direction of the lower end of the protruding portion 40 upward, even if the bottom surface swells and protrudes downward, the central portion in the longitudinal direction of the lower end of the protruding portion 40 will not be more limited than the peripheral portion 32 The ground plane H protrudes further downward. This can prevent the container from tipping over.

In some cases, the accommodating portion 17 is filled with a high-temperature content (hot compress), and the shrink film is attached to the accommodating portion 17 while the container 1 is heated. Since the container 1 is heated and softened, when the conventional container is used, if the shrink film is installed in a heated state, the protrusion portion 40 may be deformed downward due to the compression of the receiving portion 17 during installation, so that the container 1 may be deformed. Situation (ie, the container 1 protrudes backward), causing the protrusion 40 to protrude from the ground plane H so that the container is easily tipped over. 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, so that the container 1 can be suppressed from protruding backward.

1-6. Modification

In addition, this invention can also be implemented as follows.

. In the above embodiment, although the protruding portion 40 is formed from the tapered portion 41 and the thin portion 42, the thin portion 42 is not essential. When the thin-walled portion 42 is not provided, the central portion in the longitudinal direction of the lower end of the tapered portion 41 is bent upward, and the same effect as the above-described embodiment can be obtained. In addition, the cross-sectional shape of the protrusion 40 may not be tapered, but may have a rectangular cross-section, for example.

. In the above-mentioned embodiment, as shown in the schematic diagram of FIG. 7B, the lower end of the protruding portion 40 has a shape bent almost across the longitudinal direction. At the same time, as shown in FIG. 8A, the lower end of the protruding portion 40 may be formed in a shape that is curved upward only in the central portion in the longitudinal direction. In addition, as shown in FIG. 8B, the curved portion at the lower end of the protrusion 40 may be slightly offset from the center including the center of the protrusion in the longitudinal direction. These shapes can also suppress cracking in the short side direction at the central portion.

2. The second embodiment of the first viewpoint

The laminated peel container 1 according to the second embodiment of the first aspect of the present invention will be described with reference to FIGS. 9 to 12. The container 1 according to the present embodiment is similar to the first embodiment in the first viewpoint, and the main difference is that the structure of the inner bottom surface 1a inside the container 1 is different. Hereinafter, the difference will be mainly described.

In the present embodiment, the inner bottom surface 1a has a curved shape convex toward the inside of the container, and the radius of curvature C1 at the central region P1 of the container 1 is smaller than the radius of curvature C2 at the peripheral region P2 located around it. According to such a structure, it is unlikely that the protrusion 40 is deformed downward. Therefore, it is possible to suppress the deformation of the protruding portion 40 downward when the shrink film is installed immediately after heat application.

C1/C2 is 0.1 to 0.9, preferably 0.2 to 0.6, specifically, it can be 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, or any two of the values exemplified here Within the range between the values.

If the distance from the center C of the container to the boundary between the areas P1 and P2 is Y1, and the distance from the center C of the container to the lowest portion 32b at the periphery of the inner bottom surface 1a is Y2, then Y1/Y2 is 0.1 to 0.9, preferably 0.2 to 0.6 Specifically, it may be 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, or may be within a range between any two of the numerical values exemplified here.

It should be noted that the shape of the inner bottom surface 1a described in the second embodiment of the first viewpoint can also be applied to a container in which the protrusion 40 is not provided. Even in such a case, the curvature radius C1 is smaller than the curvature radius C2, so that the protrusion 40 can be suppressed from deforming downward.

3. Other embodiments of the first viewpoint

. In the above-described embodiment, the stacked peeling container 1 as a container has been described as an example, but the present invention may also be applied to other containers than the stacked peeling container. That is, as long as the container is provided with the protruding portion, by bending the region including the center of the lower end of the protruding portion in the longitudinal direction upward, the stress in the central portion in the longitudinal direction can be relieved to suppress the occurrence of cracking.

(Embodiment of the second viewpoint)

1. Description of the structure of the laminated peel container 1

As shown in FIGS. 13A to 14, the stacked peeling container 1 includes a container body 3 and a valve member 4. The container body 3 includes a torso portion 7 for storing contents, a shoulder portion 8 for storing contents, and a mouth portion 9 for discharging the contents in the container body 3 out of the container body 3. As shown in FIG. 17B, a gland Cp is attached to the mouth portion 9. That is, the mouth 9 is a mouth of a push-type structure, and the cap Cp is attached to the mouth 9 by being pressed against the mouth 9. In addition, in FIG. 17B, the cap Cp is schematically indicated by a broken line.

1-1. Container body 3

1-1-1. Shell 12 and inner bag 14

The trunk portion 7, shoulder portion 8 and mouth portion 9 of the container body 3 include 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 thicker than that of the inner bag 14 to improve recoverability. The housing 12 is composed of, for example, low-density polyethylene, linear low-density polyethylene, high-density polyethylene, polypropylene, ethylene-propylene copolymer, and mixtures thereof. The housing 12 may be composed of multiple layers. The inner bag 14 is preferably composed of multiple layers. For example, an EVOH layer composed of an ethylene-vinyl alcohol copolymer (EVOH) resin is used in the layer in contact with the housing 12, and a low-density polyethylene or a linear low-density polyethylene can be used in the layer in contact with the contents. , High-density polyethylene, polypropylene, ethylene-propylene copolymer and mixtures of polyolefin inner surface layer. In addition, an adhesive layer is preferably used between the EVOH layer and the inner surface layer.

1-1-2. Torso 7

As shown in FIGS. 13A and 13B, the trunk portion 7 is a cylindrical member with a bottom. The trunk portion 7 includes an upper portion 7A, a constricted neck portion 7B, and a bottom portion 7C. The outer diameter of the constricted neck 7B is smaller than the outer diameter of the upper portion 7A, so the user can easily grasp the constricted neck 7B. The upper portion 7A is connected to the shoulder 8.

1-1-2. Shoulder 8

As shown in FIGS. 14 and 16, the upper end of the shoulder 8 is connected to the mouth 9, and the lower end of the shoulder 8 is connected to the trunk 7. As shown in FIG. 18, the shoulder 8 protrudes in a convex shape from the side of the internal space S2 of the container body 3 to the side of the external space S1 of the container body 3, so the container body 3 has a shape that can easily ensure the inner volume. Specifically, as shown in FIG. 18, the position of the inner side of the root 9A to be mentioned later is taken as the position P1, and the position of the inner side of the portion where the curved portion 8B is connected to the upper portion 7A is taken as the position P2 to pass through the position The straight line between P1 and position P2 is an imaginary line G. The shoulder 8 protrudes in a convex shape from the imaginary line G side to the external space S1 side direction Dr. That is, the entire shoulder portion 8 protrudes convexly in the direction Dr.

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 in a flat plate shape. The inner edge of the flat surface portion 8A is in contact with the mouth portion 9, and the outer 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 mouth 9 side to the curved portion 8B side. The curved portion 8B is formed in 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 flat surface portion 8A side to the trunk portion 7, and the inclined angle of the outer surface of the curved surface portion 8B is larger than the inclined angle of the outer surface of the flat surface portion 8A.

As shown in FIGS. 13A, 13B, 15A, and 15B, the reinforcing recesses Rf and Rr are formed at the shoulder 8. One of the reinforced concave portion Rf and the reinforced concave portion Rr corresponds to the first reinforced concave portion, and the other corresponds to the second reinforced concave portion. The reinforcing recesses Rf, Rr reinforce the root 9A of the mouth 9. That is, by forming the reinforcing recesses Rf and Rr on the shoulder 8, the root portion 9A is reinforced by the reinforcing recesses Rf and Rr, thereby suppressing the mouth portion 9 from bending back to the shoulder 8 side. The reinforcement recess Rf is formed on the front side of the container body 3, and the reinforcement recess Rf is formed on the back side of the container body 3. The reinforcing recesses Rf and Rr are arranged at 180 degrees with reference to the central axis of the shoulder 8. In other words, the reinforcement recess Rf, the point on the center axis of the shoulder 8 and the reinforcement recess Rr are arranged in a straight line. The reinforcement recesses Rf and Rr are arranged at 180 degrees with respect to the central axis of the shoulder 8 to suppress the deviation of the reinforcement regions of the reinforcement recesses Rf and Rr, and to more reliably suppress the mouth 9 from bending back to the shoulder 8 side.

1-1-3. Mouth 9

The mouth 9 is connected to the upper part of the trunk 7. The mouth 9 is a cylindrical member. As shown in FIGS. 17A and 17B, the mouth portion 9 has a root portion 9A, a standing portion 9B, an enlarged diameter portion 9D, a wall portion 9E, a mounting convex portion 9C, a tip tapered wall portion 9F, and an upper mouth end portion 9G. The root portion 9A is a portion where the mouth portion 9 and the shoulder portion 8 are connected, that is, a portion provided at the root portion of the mouth portion 9. The root portion 9A is formed such that the flat surface portion 8A rises upward. The height dimension of the root portion 9A, that is, the upward amount of the root portion 9A is, for example, 0.5 mm to 2.0 mm. In addition, the magnitude of the difference between the inner and outer diameters of the root 9A is 0.5 mm to 2.0 mm. The outer surface of the root portion 9A is provided to be inclined from the standing portion 9B to the flat surface portion 8A. That is, the outer surface of the root portion 9A has a tapered shape. The standing portion 9B extends in the vertical direction. That is, the standing portion 9B is a linear cylindrical portion. The diameter of the standing portion 9B is smaller than the diameter of the root portion 9A. As shown in FIGS. 14, 17A, and 17B, the mouth portion 9 is formed with a necked shape 9H formed from the root portion 9A, the standing portion 9B to the enlarged diameter portion 9D. The enlarged diameter portion 9D extends in a direction substantially perpendicular to the central axis of the container body 3. The inner portion of the enlarged diameter portion 9D is connected to the standing portion 9B, and the outer portion of the enlarged diameter portion 9D is connected to the wall portion 9E. The wall portion 9E extends to rise upward. The upper end portion of the wall portion 9E is connected to the mounting convex portion 9C. The mounting convex portion 9C is a portion where the gland Cp is mounted, and the outer diameter of the mounting convex portion 9C is the largest of the outer diameters of the mouth portion 9. The tip tapered wall portion 9F is a wall portion formed so that the portion from the attachment convex portion 9C side to the mouth upper end portion 9G side has a tapered tip. The upper end portion 9G corresponds to the content flow outlet in the container body 3, and the upper end portion 9G is located at the uppermost portion of the mouth portion 9.

1-2. Valve parts 4

As shown in FIG. 17A, the valve member 4 is installed in the outside air introduction hole 15 formed in the trunk portion 7 to regulate the inflow and outflow of air between the intermediate space 21 between the outer shell 12 and the inner bag 14 and the outer space S1. 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. The valve member 4 includes a cylindrical body 5 configured such that the intermediate space 21 communicates with the external space S1, and a movable body 6 housed in the cylindrical body 5 to be movable. The cylindrical body 5 and the movable body 6 are formed by injection molding or the like. The moving body 6 is preferably spherical.

2. Detailed description of the reinforced recess

2-1. Reinforced recess Rf

As shown in FIG. 14, FIG. 19A and FIG. 19B, the formation range of the reinforced concave portion Rf extends over the root portion 9A of the mouth portion 9, the flat surface portion 8A, and the curved surface portion 8B. In other words, the reinforced concave portion Rf is not only formed on the curved surface portion 8B and the flat surface portion 8A, but also reaches the root portion 9A from the curved surface portion 8B side. In other words, the reinforcing concave portion Rf is formed to extend from the curved surface portion 8B to the root portion 9A. The reinforcing recess Rf has a first recess R1 and a second recess R2. The first concave portion R1 is connected to the second concave portion R2, and the first concave portion R1 linearly extends from the portion connected to the second concave portion R2 to the root portion 9A. The second recess R2 is substantially circular, and the valve member 4 is disposed in the second recess R2.

As shown in FIGS. 14, 17A, 20A, and 20B, the shoulder portion 8 has a bottom wall portion 8a1, a pair of side wall portions 8a2, a circular wall portion 8a3, and an arcuate wall portion 8a4. One side wall portion 8a2 of the pair of side wall portions 8a2 corresponds to the first side wall portion, and the other side wall portion 8a2 corresponds to the second side wall portion. The first recess R1 is formed by the bottom wall portion 8a1 and the pair of side wall portions 8a2, and the second recess R2 is formed by the circular wall portion 8a3 and the arc-shaped wall portion 8a4. The bottom wall portion 8a1 is provided across the root portion 9A, the flat surface portion 8A, and the curved surface portion 8B. Similarly to this, the pair of side wall portions 8a2 are provided to span the root portion 9A, the flat surface portion 8A, and the curved surface portion 8B. As shown in FIG. 20A, one side wall portion 8a2 is connected to one side end of the bottom wall portion 8a1, and the other side wall portion 8a2 is connected to the other side end of the bottom wall portion 8a1. The angle formed by the bottom wall portion 8a1 and each side wall portion 8a2 is greater than 90 degrees. As shown in FIG. 17A, the outer surface of the bottom wall portion 8a1 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 larger than that of the outer surface of the bottom wall portion 8a1.

As shown in FIG. 14, the bottom wall portion 8a1 has an upper end portion a1, an intermediate portion a2, and a lower end portion a3. The inclination angle of the outer surface of the upper end portion a1, the inclination angle of the outer surface of the intermediate portion a2, and the inclination angle of the outer surface of the lower end portion a3 are the same. In other words, 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 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 an inclination angle and extends 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 the inclination angle of the middle portion a2, the bottom wall portion 8a1 is located on the side of the side surface of the mouth portion 9, so that it is difficult for the bottom wall portion 8a1 to support the mouth portion 9. However, in this embodiment, the bottom wall portion 8a1 is maintained at an inclination angle from the middle portion a2 to the upper end portion a1 until reaching the root portion 9A. The bottom wall portion 8a1 is located closer to the position directly below the mouth portion 9, so the bottom surface wall portion 8a1 can The mouth 9 is supported more reliably. The outside air introduction hole 15 is formed in the circular wall portion 8a3, and the valve member 4 is attached to the circular wall portion 8a3. The arc-shaped wall portion 8a4 is connected to the peripheral edge of the circular wall portion 8a3.

As shown in FIG. 14, the width of the portion of the bottom wall portion 8a1 from the lower end a3 to the upper end a1 is constant. Here, the width refers to the width in a direction parallel to the direction from one side wall portion 8a2 toward the other side wall portion 8a2. If the width of the upper end portion a1 gradually narrows toward the root portion 9A, the bottom wall portion 8a1 becomes difficult to support the mouth portion 9. However, in this embodiment, since the width of the bottom wall portion 8a1 ranging from the lower end portion a3 to the upper end portion a1 is constant, the bottom surface wall portion 8a1 can support the mouth portion 9 more reliably.

2-2. Reinforced recess Rr

As shown in FIGS. 16, 19A, and 19B, the forming range of the reinforced concave portion Rr is the same as the reinforced concave portion Rf, and extends over the root portion 9A of the mouth portion 9, the flat surface portion 8A, and the curved surface portion 8B. That is, the reinforcing concave portion Rr is not formed only on the curved surface portion 8B and the flat surface portion 8A, but the reinforcing concave portion Rr reaches the root portion 9A from the curved surface portion 8B side. In other words, the reinforcing concave portion Rr is formed to extend from the curved surface portion 8B to the root portion 9A.

As shown in FIGS. 16, 17A, and 20A, the shoulder portion 8 has a bottom wall portion 8b1 and a pair of side wall portions 8b2. One side wall portion 8b2 of the pair of side wall portions 8b2 corresponds to the first side wall portion, and the other side wall portion 8b2 corresponds to the second side wall portion. The reinforcing concave portion Rr is formed by the bottom wall portion 8b1 and the pair of side wall portions 8b2. The bottom wall portion 8b1 is provided to span the root portion 9A, the flat surface portion 8A, and the curved surface portion 8B. Similarly to this, the pair of side wall portions 8b2 are provided to span the root portion 9A, the flat surface portion 8A, and the curved surface portion 8B. As shown in FIG. 20A, one side wall portion 8b2 is connected to one side end of the bottom wall portion 8b1, and the other side wall portion 8b2 is connected to the other side end of the bottom wall portion 8b1. The angle formed by the bottom wall portion 8b1 and each side wall portion 8b2 is greater than 90 degrees. As shown in FIG. 17A, the outer surface of the bottom wall portion 8b1 is an inclined surface.

As shown in FIG. 16, the bottom wall portion 8b1 has an upper end b1, an intermediate portion b2, and a lower end 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 intermediate portion b2. In addition, the inclination angle of the outer surface of the lower end b3 is smaller than the inclination angle of the outer surface of the upper end b1. In addition, 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 extends from the flat surface portion 8A side to the root portion 9A while maintaining the inclination angle. The bottom wall portion 8b1 maintains an inclined angle from the middle portion b2 to the upper end portion b1 and reaches the root portion 9A, so the bottom wall portion 8b1 is located closer to the position directly below the mouth portion 9 so that the bottom wall portion 8b1 can more reliably support the mouth portion 9.

As shown in FIG. 16, the width of the bottom wall portion 8b1 from the lower end b3 to the upper end b1 is constant. The width here refers to the width in a direction parallel to the direction from one side wall portion 8b2 toward the other side wall portion 8b2. Thus, the bottom wall portion 8b1 can more reliably support the mouth portion 9.

3. Manufacturing method of laminated peel container

Next, an example of a method for manufacturing the laminated peel container 1 will be described. The laminated parison in the molten state is extruded from the extruder, and the laminated parison in the molten state is put into a split mold for blow molding, and then the split mold is closed. Next, a blow nozzle is inserted into the opening of the container body 3 on the mouth 9 side, and air is blown into the cavity of the divided mold with the mold closed. Subsequently, the split mold was opened to take out the blow molded product. Then, an outside air introduction hole 15 is formed in the casing 12 of the container body 3 of the laminated peel container 1. In addition, when the outside air introduction hole 15 is formed, the peeling tool is brought into contact with the container body 3 in a state where the container body 3 is attached to the support mold. In a state where the container body 3 is attached to the support mold, the reinforcement recess Rr is engaged with the support mold. In other words, the reinforcing concave portion Rr not only functions to reinforce the root portion 9A of the mouth portion 9, but also has the function of positioning the container body 3 in the axial direction when the outside air introduction hole 15 is formed.

4. Effect of implementation

The container body 3 of the laminated peeling container 1 is required to have a larger volume (for example, 600 ml or more). When the volume of the container body 3 is increased, it is generally not necessary to change the shape of the mouth 9. If the diameter of the mouth portion 9 is increased, the existing cap cannot be continued, and even if the diameter of the mouth portion 9 is increased, the volume of the container body 3 hardly increases. Therefore, when the volume 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 larger. When the amount of the laminated parison used when manufacturing one container body 3 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 8 or the trunk 7 tends to be thinner than the thickness of the mouth 9, when the diameter of the shoulder 8 or the trunk 7 is set relatively large, the shoulder 8 The thickness of the torso 7 or the torso 7 tends to be thinner than the thickness of the mouth 9. When the thickness of the shoulder portion 8 is thin, the mouth portion 9 is easily bent and retracted by the shoulder portion 8 side. In other words, when the volume of the container body 3 is increased, the thickness of the shoulder portion 8 is likely to become thin, so that the mouth portion 9 (root portion 9A) is easily bent and retracted by the shoulder portion 8 side. The shoulder portion 8 of the container body 3 of the laminated peeling container 1 according to the present embodiment is formed with reinforcing recesses Rf and Rr. The reinforcing concave portions Rf and Rr have a function as the rib supporting the mouth portion 9.

Specifically, the reinforcing recesses Rf and Rr are formed on the shoulder portion 8, and wall portions (bottom wall portions 8a1 and 8b1 and side wall portions 8a2 and 8b2) are formed on the reinforcing recesses Rf and Rr. Since the wall portion is formed to stand upright, it is more resistant to external forces in the vertical direction (direction parallel to the central axis of the container body 3) than the flat surface portion 8A and the curved surface portion 8B. That is, when the wall portion acts on the mouth portion 9 with an external force in the vertical direction, the mouth portion 9 (root portion 9A) can function as a reinforcing rib. In the present embodiment, the reinforcing concave portions Rf and Rr reach the root portion 9A, so 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 laminated peeling container 1 according to the present embodiment has enhanced resistance to the action of fitting the root 9A into the shoulder 8 side. Therefore, 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 laminated peeling container 1 according to the present embodiment can still suppress bending Retract to the shoulder 8 side.

The shoulder portion 8 of the container body 3 of the laminated peeling container 1 according to the present embodiment protrudes in a direction protruding from the inner space S2 side of the container body 3 toward the outer space S1 side of the container body 3. Therefore, the container body 3 has a shape that can meet the demand for larger volume. However, when the shoulder portion 8 protrudes in a direction protruding from the inner space S2 side of the container body 3 to the outer space S1 side of the container body 3, the shoulder portion 8 will also be difficult to reach from directly below the mouth 9 Support mouth 9. As a result, when an external force is applied to the mouth portion 9, the mouth portion 9 (the root portion 9A) is easily bent and retracted to the shoulder 8 side. In the shoulder body 8 of the container body 3 of the laminated peeling container 1 according to the present embodiment, the reinforcing recesses Rf and Rr that function as the ribs described above are formed. In the present embodiment, the reinforcing recesses Rf and Rr reach the root 9A, so the wall that functions as a rib also reaches the root 9A. In this way, the root portion 9A can be supported by the wall portion from a position near the position directly below the root portion 9A. As a result, the root portion 9A enhances the resistance to the action of fitting into the shoulder 8 side, thereby suppressing the mouth portion 9 (root portion 9A) from bending back to the shoulder 8 side.

It should be noted that the wall portions (bottom wall portions 8a1, 8b1 and side wall portions 8a2, 8b2) may 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, so that it is possible to further suppress the mouth portion 9 (root portion 9A) from bending back to the shoulder portion 8 side.

In the present embodiment, the reinforcing recesses Rf and Rr reach the root 9A, so even if the shoulder 8 does not exceed the necessary thickness, the resistance of the container body 3 against the effect of the root 9A being fitted on the shoulder 8 side can be ensured.

In the present embodiment, the gland Cp is pressed against the mouth 9 to be installed on the mouth 9, as shown in FIG. 17B, when the gland Cp is pressed onto the mouth 9, the mouth 9 has a curved back to the shoulder The effect of the force Fc on the 8 side. As shown in FIG. 17B, the lower end portion Cp1 of the cap Cp is disposed above the standing portion 9B of the mouth portion 9, and the mouth portion 9 is provided between the lower end portion Cp1 of the cap Cp and the shoulder portion 8 of the container body 3. Wider interval Sp. The interval Sp is provided in the mouth portion 9 in order to support the mouth portion 9 when the gland Cp is pressed and attached to the mouth portion 9, and therefore it is necessary to arrange the support jig T in the enlarged diameter portion 9D. Thus, by providing the gap Sp in the mouth portion 9, the lower portion of the mouth portion 9 forms a necked shape 9H, and if the reinforcement recesses Rf and Rr do not form the shoulder portion 8, the mouth portion 9 is dropped when the container body 3 (laminated peel container 1) falls The possibility of the deformation receding to the shoulder 8 side will increase. It should be noted that the constricted shape 9H is still exposed to the outside in a state where the gland Cp is attached to the mouth 9. Therefore, if the cap Cp is attached to the mouth portion 9 and the reinforcing recesses Rf and Rr are not formed on the shoulder portion 8, the mouth portion 9 may bend and retreat to the shoulder portion 8 side when the container body 3 (laminated peeling container 1) falls Sex will increase. In contrast to this, the shoulder portion 8 of the container body 3 of the laminated peel container 1 according to the present embodiment is formed with the reinforced recesses Rf and Rr as described above, and even if the lower portion of the mouth portion 9 is the necked shape 9H, it can still be suppressed The mouth 9 bends and retracts to the shoulder 8 side. Therefore, regardless of whether the gland Cp is attached to the mouth portion 9, it is possible to exert an effect of suppressing the mouth portion 9 from bending back to the shoulder portion 8 side.

5. The forming range of the reinforced concave portions Rf and Rr

In the present embodiment, the example in which the reinforcing concave portions Rf and Rr reach the root portion 9A from the curved surface portion 8B side has been described, but it is not limited to this method. Specifically, as shown in FIGS. 13A to 13C, the reinforcing concave portions Rf and Rr may be hidden in the mouth portion 9 (mounting convex portion 9C) when extending from the flat surface portion 8A side to the container body 3 when viewed from the direction of the upper surface position. In other words, as shown in FIG. 17B, the upper ends of the reinforcing recesses Rf and Rr are located closer to the central axis of the container body 3 than the imaginary line L extending vertically from the mounting convex portion 9C. The container body 3 provided with this structure can achieve the same effect as the above-described embodiment. In addition, although the laminated peeling container 1 concerning this embodiment is the mode provided with the mouth part 9 to which the cap Cp is attached, it is not limited to this mode. Instead of the cap Cp, a screw-type cover may be used on the lid of the laminated peeling container 1, and a screw portion screwed to the screw-type cover may be formed on the mouth portion 9 instead of the mounting protrusion 9C. Even the container body 3 having this structure can still achieve the same effect as the above-described embodiment.

(Embodiment of the third viewpoint)

As shown in FIG. 21, the stacked peeling container 1 according to an embodiment of the third aspect of the present invention includes a lid 2, a container body 3, and a valve member 4. The container body 3 includes a storage portion 17 for storing the content, and a mouth portion 9 for discharging the content from the storage portion 17.

As shown in FIG. 22, the container body 3 includes an outer shell 12 and an inner bag 14 in the storage portion 17 and the mouth portion 9. As the content decreases, the inner bag 14 peels off from the outer shell 12 so that the inner bag 14 separates and contracts from the outer shell 12.

The outer shell 12 is formed to be thicker than the inner bag 14 for high recoverability. The housing 12 may be composed of, for example, low-density polyethylene, linear low-density polyethylene, high-density polyethylene, polypropylene, ethylene-propylene copolymer, and mixtures thereof. The housing 12 may be composed of multiple layers. The inner bag 14 is preferably composed of multiple layers. For example, an EVOH layer composed of an ethylene-vinyl alcohol copolymer (EVOH) resin may be used for the layer in contact with the housing 12, and a layer such as low density polyethylene, linear low density polyethylene, high Inner surface layer composed of polyolefin such as density polyethylene, polypropylene, ethylene-propylene copolymer and mixtures thereof. In addition, an adhesive layer is preferably used between the EVOH layer and the inner surface layer.

The cap 2 is attached to the mouth 9 of the container body 3. In this embodiment, although the cover 2 is screw-type, it may be attached by a press type. As shown in FIG. 21, the cover 2 includes a cover body 20 and a cover 22 formed of synthetic resin. The cover body 20 and the cover 22 are connected by a hinge 23, and the cover 22 can be opened and closed. The cover body 20 includes a main cover member 24, a check valve 26, and a pouring member 29. It should be noted that the cover 22 is omitted in FIGS. 22 to 23.

The main cover member 24 is a member that forms the outer shape of the cover 2 and includes a cylindrical outer cylindrical portion 24o, a top plate portion 24t, an annular protrusion 24p, and a screw groove 24e. The top plate portion 24t extends inward from the upper end of the outer cylindrical portion 24o, and the annular protrusion 24p extends downward from the inner edge of the top plate portion 24t. The outer peripheral surface of the annular protrusion 24p is in contact with the inner peripheral surface of the mouth 9. The screw groove 24e is formed on the inner circumferential surface of the outer cylindrical portion 24o, and is engaged with the engaging portion of the mouth portion 9.

The check valve 26 is attached to the annular protrusion 24p. As shown in FIGS. 24 to 25, the check valve 26 includes a main body 26a, a cover 26b, and a hinge 26c. The main body portion 26a is cylindrical and has a through hole 26a1. The lid portion 26b is configured to open and close the through-hole 26a1. The cover portion 26b has an inclined surface 26b1. The inclined surface 26b1 abuts the edge of the through-hole 26a1, and the through-hole 26a1 is closed, so that the check valve 26 is closed. The main body portion 26a and the cover portion 26b are connected by a hinge portion 26c. The hinge portion 26c is configured to be elastically deformable, and the lid portion 26b rotates around the hinge portion 26c by the elastic deformation of the hinge portion 26c. In this way, the through-hole 26a1 is opened to make the check valve 26 open.

The check valve 26 is preferably formed of an elastic body such as a rubber material, and the body portion 26a, the cover portion 26b, and the hinge portion 26c are preferably integrally formed.

Although the angle α of the inner surface 26a2 of the main body portion 26a and the inclined surface 26b1 of the cover portion 26b is not particularly limited, it is preferably 25.1 degrees or more, and more preferably 25.5 degrees or more. Angle α can be 25.1~40 degrees, specifically 25.1, 25.5, 26, 26.5, 27, 27.5, 28, 28.5, 29, 29.5, 30, 35, 40 degrees, or it can be the value exemplified here Within the range between any two values. If the angle α is too small, the check valve 26 may not be easily opened when the cover portion 26b is fitted into the through hole 26a1. Setting the angle α to 25.1 degrees or more is advantageous for the check valve 26 to be opened.

The pouring member 29 includes a thin plate-shaped disk portion 29d, a pouring port 29m, and an engaging portion 29e. The pouring opening 29m is formed in the center of the disk portion 29d, and the engaging portion 29e is engaged with the inner edge of the top plate portion 24t of the main cover member 24. The pouring member 29 can prevent dripping when the contents are discharged, and it is easy to control the discharge direction.

As shown in FIG. 22, the valve member 4 is attached to the outside air introduction hole 15 formed in the accommodating portion 17, and is used to adjust the inflow and outflow of gas between the intermediate space 21 between the outer casing 12 and the inner bag 14 and the outer 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 FIGS. 22, 26A, and 26B, the valve member 4 includes: a cylindrical body 5 that is provided so that the intermediate space 21 communicates with the external space S; and a movable body 6 that is accommodated to be movable within the cavity 50. The cylindrical body 5 and the movable body 6 are formed by injection molding or the like. The moving body 6 is preferably spherical.

As shown in FIGS. 26A to 28B, the cylindrical body 5 has: a narrow-diameter shaft portion 51 disposed in the outside air introduction hole 15; and an engaging portion 52, which is provided on the outer space S side of the shaft portion 51 to prevent the cylindrical body 5 from entering Into the intermediate space 21, and is disc-shaped; the enlarged diameter portion 53, which is provided on the intermediate space 21 side of the shaft portion 51, prevents the cylindrical body 5 from being pulled out from the outside of the container body 3. The upper surface 52 u of the engaging portion 52 (that is, the outer surface on the outer space S side of the cylindrical body 5) is formed with an opening 52 o connected to the cavity portion 50. The adjacent area 52a is a circular flat area. In addition, an annular protruding region 52 p protruding from the adjacent region 52 a toward the external space S side is formed outside the adjacent region 52 a of the upper surface 52 u of the engaging portion 52.

The cavity 50 is a hole penetrating the cylindrical body 5 in the axial direction (direction perpendicular to the outside air introduction hole 15 ). In order to accommodate the spherical mobile body 6, the axial intermediate space 21 side and the external space S side are opposite to each other. The shape of the central part narrows. Specifically, as shown in FIGS. 28A and 28B, the portion corresponding to the inner side of the engagement portion 52 on the intermediate space 21 side of the hollow portion 50 is a truncated cone shape whose diameter decreases toward the outer space S side and is along the circumferential direction A stopper 52s that engages with the mobile body 6 to block the flow of gas is formed. On the side of the intermediate space 21 of the hollow portion 50, a pair of support portions 53p (refer to FIGS. 26B and 28A) are formed at two opposite positions. The pair of support portions 53p project radially inward and support and are accommodated in the hollow portion Moving body within 50 In the present embodiment, the support portion 53p has an inclined surface 53p1 inclined toward the external space S side, and the movable body 6 abuts on the inclined surface 53p1, so that the movable body 6 is supported.

With the above structure, as shown in FIGS. 29A to 29C, the cross-sectional shape of the hollow portion 50 is a circle whose diameter gradually decreases toward the external space S side at the cross-section (C-C cross-section) at the position corresponding to the engaging portion 52. In addition, the cross-section at the position corresponding to the shaft portion 51 (DD cross-section) is a shape formed by having a pair of parallel planar walls 51s and two arc-shaped walls 51c, which can be rounded by cutting Two opposite parts are formed. The cross section (EE cross section) at the position corresponding to the enlarged diameter portion 53 has a shape formed by a pair of parallel planar walls 53s and two arc-shaped walls 53c. The two arc-shaped walls 53c can be cut by cutting Formed by two opposite parts. Here, the flat wall 53s is formed by the inclined surface 53p1.

In addition, since the support portion 53p has the inclined surface 53p1 inclined toward the external space S side, when the cylindrical body 5 is formed by injection molding, it is possible to suppress the center pin forming the hollow portion 50 of the cylindrical body 5 from being pulled out from the intermediate space 21 side At this time, the support portion 53p as an undercut is reversed. In addition, as shown in FIG. 28A, the support portion 53p has an inclined surface 53p2 inclined toward the intermediate space 21 side on the side of the intermediate space 21.

As shown in FIGS. 26B and 27B, the front end portion (the end of the enlarged diameter portion 53) of the cylindrical body 5 is an annular flat surface 53e, and the flat surface 53e is formed in two places facing each other in the circumferential direction. Notch 53n.

As shown in FIG. 30A, the side of the intermediate space 21 (the side of the enlarged diameter portion 53) of the movable body 6 is introduced into the hollow portion 50 of the cylindrical body 5 having the above shape. Although the support portion 53p is provided in the cylindrical body 5, since the support portion 53p has the inclined surface 53p2, the movable body 6 can be inserted into the cavity portion 50 across the support portion 53p.

As shown in FIG. 29B, in a state where the moving body 6 is accommodated in the hollow portion 50 of the cylindrical body 5, the distance d1 between the pair of flat walls 51s is on a cross section (DD cross section) at a position corresponding to the shaft portion 51 It is slightly larger than the diameter d2 of the moving body 6. The ratio (d1/d2) of the distance d1 between the pair of plane walls 51s to the diameter d2 of the moving body 6 is preferably 1.01 to 1.20. The 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, 1.20, or it can be exemplified here Within the range between any two values. In addition, in the embodiment shown in the figure, d1/d2=1.09 (d1=2.600 mm, d2=2.381 mm). In addition, 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. The 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, 1.60 may also be within the range between any two of the numerical values exemplified here. In addition, 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. Such a dimensional relationship allows the movable body 6 to move in the vertical direction (direction perpendicular to the axis) within the cavity 50, and a passage for gas circulation can be secured in the gap 50g between the arc-shaped wall 51c and the movable body 6. On the other hand, as shown in FIG. 29C, in the cross section (E-E cross section) at the position corresponding to the enlarged diameter portion 53, the distance d4 between the plane walls 53s is smaller than the diameter d2 of the moving body 6, so that the moving body 6 can be held. However, in the E-E cross section, a gap 50g is formed between the arc-shaped wall 53c and the moving body 6, and through the gap 50g, the gas flow can be maintained without obstructing the moving body 6 while being held by the support portion 53p.

In the valve member 4 configured as described above, as shown in FIG. 30A, while the expanded diameter portion 53 presses the expanded outside air introduction hole 15, the expanded diameter portion 53 is inserted into the intermediate space 21 to be mounted on the container body 3. When the engaging portion 52 is pushed into contact 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 outside air introduction hole 15, and the valve member 4 is held in the housing 12 on. The outer peripheral surface of the shaft portion 51 is in close contact with the edge of the outside air introduction hole 15, so that the gas in the intermediate space 21 can be suppressed from flowing out from the gap between the edge of the outside air introduction hole 15 and the cylinder 5 when the container body 3 is compressed.

In addition, the cylindrical body 5 is attached to the container body 3 in close contact with the edge of the outside air introduction hole 15 through the outer peripheral surface of the shaft portion 51, so the enlarged diameter portion 53 is not necessary. In addition, the front end of the cylinder 5 is provided with a flat surface 53e. Therefore, when the valve member 4 is pushed into the intermediate space 21, even if the front end of the valve member 4 collides with the inner bag 14, it is not easy to damage the inner bag 14. In addition to this, in this embodiment, the stopper 52s is formed inside the engaging portion 52 that is offset from the shaft portion 51 to the external space S side, so even if the edge of the outside air introduction hole 15 presses the shaft portion 51 The stopper 52s is deformed, so that the flow of gas can be appropriately prevented.

The accommodating portion 17 is covered with a shrink film after the valve member 4 is installed. At this time, the valve member 4 is attached to the valve member mounting recess 17a provided in the housing portion 17 so that the valve member 4 does not interfere with the shrink film. In addition, an air circulation groove 17b is provided along the direction from the valve member mounting recess 17a to the mouth 9 so that the valve member mounting recess 17a is not sealed by the shrink film (see FIG. 21). In addition to this, the valve member 4 according to the present embodiment is provided outside the adjacent region 52a of the upper surface 52u of the cylindrical body 5 and is provided with an annular protruding region protruding from the adjacent region 52a toward the external space S side 52p, therefore, the shrinkable film can be in contact with the protruding region 52p, and the moving body 6 can be brought into contact with the shrinkable film to prevent the movement of the moving body 6 from being hindered.

In addition, as shown in FIG. 30B, in a state where the moving body 6 is engaged by the stopper 52 s, the valve member 4 according to the present embodiment introduces outside air at the end perpendicular to the outer space side of the moving body 6 The height position h1 in the direction of the hole 15 (here, based on the outer surface of the casing 12 in the state where the cylinder 5 is mounted on the casing 12 is taken as a reference, the same below) is higher than the height position h2 of the adjacent area 52a of the cylinder 5 (ie , H1>h2). That is, in a state where the mobile body 6 is engaged with the stopper 52s, a part of the mobile body 6 is configured to fly out from the opening 52o. With such a configuration, even if the cavity portion 50 is narrow, the amount of movement of the movable body 6 can be covered, so that the valve member can be miniaturized (thinned). In addition, when the moving body 6 is engaged with the stopper 52s, the height position h1 in the direction of the outside air introduction hole 15 perpendicular to the end of the outer space side of the moving body 6 is higher than the height position h3 of the protruding region 52p Low (ie, h1<h3). With such a configuration, it is possible to effectively suppress the contact between the moving body 6 and the shrink film.

The moving body 6 preferably has a weight of 0.0250 g or less. If the moving body 6 is too heavy, when the compressive force is applied to the housing 12 and when the compressive force is released from the housing 12, the mobile body 6 cannot move quickly and the dischargeability deteriorates, so that external air easily flows into the interior through the check valve 26 Inside the bag 14. The weight is more preferably 0.0150 g or less, and still more preferably 0.0100 g or less. In such a case, the mobile body 6 can move more easily and quickly. The weight of the moving body 6 is preferably 0.0030 or more. If the moving body 6 is too light, the rigidity of the moving body 6 tends to become insufficient. The weight of the moving body 6 may specifically be 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, 0.0250g, or may be the values exemplified here Within the range between any two values.

The material of the moving body 6 is not particularly limited, and may be any of resin, metal, or ceramic.

The movable 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, the mobile body 6 may not move smoothly. Specifically, the diameter of the moving body 6 is 2.356, and it can also be 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 the values exemplified here. Within the range between any two values.

Next, the operation mode of the stacked peeling container 1 according to this embodiment will be described.

First, when discharging the contents, the cover 22 shown in FIG. 21 is opened to expose the pouring member 29, the container body 3 is tilted so that the pouring port 29m faces downward, and the housing 12 of the container body 3 is compressed. When the casing 12 is compressed while the gas enters the intermediate space 21, the gas in the intermediate space 21 enters the hollow portion 50 from the enlarged diameter portion 53 side. As shown in FIG. The stopper 52s abuts. When the moving body 6 is engaged by the stopper 52s, the flow of gas passing through the cavity 50 is blocked. In this state, when the outer casing 12 is further compressed, the pressure in the intermediate space 21 becomes high, and the inner bag 14 is compressed.

When the inner bag 14 is compressed, the internal pressure of the contents in the inner bag 14 increases, thereby pressing the lid portion 26b. When the lid portion 26b is pressed, the hinge portion 26c is elastically deformed, so that the lid portion 26b rotates about the hinge portion 26c. Thereby, the check valve 26 becomes an open state, and the content is discharged through the pouring port 29m. When the angle α between the inner surface 26a2 of the main body portion 26a and the inclined surface 26b1 of the cover portion 26b is 25 degrees or less, the cover portion 26b is fitted into the through hole 26a1 so that it is difficult to open the through hole 26a1, and when the angle α is 25.1 degrees or more At this time, the through hole 26a1 can be opened smoothly.

Subsequently, when the required amount of contents is discharged, and the container body 3 returns to the standing position and releases the compressive force to the outer case 12, the compressive force to the inner bag 14 is also released and the internal pressure of the contents in the inner bag 14 decreases Then, the cover portion 26b and the hinge portion 26c return to their original shapes, and the through hole 26a1 is closed to bring the check valve 26 into a closed state.

When the compression force on the housing 12 is released, the housing 12 will return to its original shape due to its own elasticity. As the housing 12 recovers the pressure in the intermediate space 21, as shown in FIG. 30B, a force F in the direction of the inside of the container is applied to the moving body 6 of the intermediate space 21. In this way, the moving body 6 moves to the bottom surface of the cavity 50 to form the state shown in FIG. 30A, and the outside air is introduced into the intermediate space 21 through the gap forming the wall of the moving body 6 and the cavity 50. It should be noted that in this embodiment, a gap 50g is formed between the arc-shaped wall 51c and the arc-shaped wall 53c forming the movable body 6 and the cavity 50 (see FIGS. 29B and 29C ). After the contents are discharged, the cross-sectional area of the external air drawn in increases, so that the resilience of the housing 12 is improved.

2.356mm~2.406mm的特定結構的情況下，能夠特別有效地抑制外部氣體流入到內袋14內。 In addition, if the pressure of the intermediate space 21 decreases before the completion of the closing of the through hole 26a1 in the check valve 26, 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 26a1 is not easily closed, so it is very easy to form the above-mentioned situation. 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 it can be solved that outside air is introduced into the intermediate space 21 so that the intermediate space 21 is in a reduced pressure state. Therefore, according to this embodiment, the outside air can be prevented from flowing into the inner bag 14. The moving body 6 is spherical, has a weight of 0.0250 g or less, and has a size of

In the case of the specific structure of 2.356 mm to 2.406 mm, the inflow of outside air into the inner bag 14 can be particularly effectively suppressed.

【Example】

The following examples and comparative examples mainly relate to the invention of the third aspect.

1. Manufacture of laminated peel container

<Example 1>

The layer peeling according to the above-described embodiment was manufactured in such a manner that the angle α = 26.0 degrees, the distance d1 between the pair of plane walls 51s = 2.600 mm, the diameter d2 of the moving body 6 = 2.381 mm, and the weight of the moving body 6 was 0.096 g Container 1.

<Example 2>

The laminated peeling container 1 was manufactured under the same conditions as in Example 1 except that the angle α was 24.0 degrees.

<Example 3>

The material of the moving body 6 in Example 1 was not changed, and the laminated peeling container 1 was manufactured under the same conditions as Example 1 except that the diameter d2 was 2.350 mm.

<Example 4>

The material of the moving body 6 in Example 1 was not changed, and the laminated peeling container 1 was manufactured under the same conditions as in Example 1 except that the diameter d2 was 2.410 mm.

<Example 5>

The laminated peeling container 1 was manufactured under the same conditions as in Example 1 without changing the diameter of the moving body 6 in Example 1, changing the material, and making the weight other than 0.0542 g.

<Comparative Example 1>

In Comparative Example 1, the valve member having the structure shown in FIG. 31 was inserted into the outside air introduction hole 15 and the valve member was moved relative to the housing 12 to open and close the outside air introduction hole 15 except that it was the same as Example 1.的conditions Manufacturing laminated peeling container 1.

2. Discharge test

The stacked peeling containers in the above examples and comparative examples are filled with water, and it is confirmed whether the contents are discharged when the casing 12 is slightly compressed (dischargeability), and whether the outside air can be suppressed from flowing into the inner bag 14 after the contents are discharged by half (Suppress inflow). Ten samples were prepared according to the examples and comparative examples, and each sample was tested.

All samples of the container of Comparative Example 1 had poor inflow resistance. All the samples of the containers of Examples 1 to 2 were excellent in dischargeability and flow-inhibition, and the container of Example 1 had better dischargeability than the container of Example 2. In the containers of Examples 3 to 5, a sample excellent in both the dischargeability and the inflow suppression property, and a sample in which at least one of the dischargeability and the inflow suppression property were poor were mixed.

1‧‧‧Lamination peeling container

3‧‧‧Container body

3r‧‧‧Valve parts installation recess

4‧‧‧Valve parts

9‧‧‧ Mouth

9e‧‧‧Joint Department

17‧‧‧ Containment Department

30‧‧‧Bottom

Claims (22)

A container comprising a container portion and a protruding portion, wherein the bottom surface of the container portion includes a central portion and a peripheral portion surrounding the central portion, the central portion is configured to be recessed relative to the peripheral portion The bottom portion rises, and the protruding portion is configured to protrude downward from the central portion, and the protruding portion includes a curved portion curving upward in a region including the center of the lower end in the longitudinal direction. The container according to claim 1, wherein the lower end of the protruding portion is located above the ground surface of the peripheral portion. The container according to claim 2, wherein the ratio of the distance from the top that rises from the bottom of the central portion to the most recessed and concave portion of the curved portion to the distance from the top to the ground plane It is 0.75~0.99. The container according to any one of claims 1 to 3, wherein the container is configured to have an outer shell and an inner bag, and the inner bag shrinks as the content decreases. The container according to claim 4, wherein, in the protruding portion, the outer layer constituting the outer shell and the inner layer constituting the inner bag are respectively disposed to be defined by the longitudinal direction and the up-down direction of the protruding portion The symmetrical position of the plane. The container according to claim 5, wherein the protruding portion includes a tapered portion, and the tapered portion has a cross-section perpendicular to the longitudinal direction, and has a tapered shape from the bottom to the lower end. The container according to claim 6, comprising a thin-walled portion formed at a position on the lower end side of the tapered portion and being thinner than the thickness of the tapered portion. The container according to any one of claims 1 to 3, wherein the inner bottom surface of the container as the inner bottom surface presents a convex curved shape toward the inner side of the container, and the inner bottom surface is located on the container The radius of curvature of the central area is smaller than the radius of curvature at the surrounding area around the central area. A container comprising an accommodating portion and a protruding portion, wherein the bottom surface of the accommodating portion includes a central portion and a peripheral portion surrounding the central portion, the central portion is configured to be recessed relative to the peripheral portion and the bottom rises, The protruding portion is configured to protrude downward from the central portion, the inner bottom surface of the inner bottom surface of the container is a convex curved shape toward the inner side of the container, and the inner bottom surface is located in a central region of the container The radius of curvature of is smaller than the radius of curvature at the surrounding area around the central area. A laminated peel container includes a container body having an outer shell 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 and The shoulder portion is connected, the shoulder portion has a flat face portion and a reinforced concave portion, and the flat face portion is connected with the mouth portion, the reinforced concave portion is recessed from the outer shell side toward the inner pocket side, and the The reinforcing concave portion extends from the flat surface side toward a position hidden in the mouth portion when viewed from the upper surface of the container body. According to the laminated peeling container described in claim 10, the mouth portion has a root portion, and the root portion is formed to swell on the flat surface portion, and the reinforcing concave portion reaches the root portion from the flat surface portion side. The laminated peel container according to claim 10 or claim 11, wherein the shoulder portion protrudes in a direction protruding from the inner space side of the container body to the outer space side of the container body. The laminated peeling container according to claim 10 or claim 11, wherein a first reinforced concave portion and a second reinforced concave portion corresponding to the reinforced concave portion are formed on the shoulder portion, and the first reinforced concave portion and the second reinforced portion The concave portion is arranged at 180 degrees with respect to the central axis of the shoulder. According to the laminated peeling container described in claim 11, the reinforcing concave portion has a bottom wall portion, a first side wall portion, and a second side wall portion, and the first side wall portion and the second side wall portion are respectively provided on one side of the bottom surface wall portion And the other side end, the bottom wall portion, the first side wall portion, and the second side wall portion reach the root portion. The stacked peeling container according to claim 14, wherein the inclination angle of the bottom wall portion is constant from the flat surface side to the root portion. According to the laminated peel container described in claim 10 or claim 11, 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 torso portion . A laminated peeling container including a lid, a container body, and a valve member, wherein the container body has an outer shell and an inner bag, and the inner bag shrinks as the content decreases, and the container body includes a discharge port The mouth of the content, the outside air introduction hole that connects the intermediate space between the outer shell and the inner bag and the outer space, the cover is mounted on the mouth, and is provided with a check valve, the check The valve includes a cylindrical body portion having a through hole, and a cover portion configured to open and close the through hole. The cover portion includes an inclined surface that contacts the edge of the through hole to close the through hole. The body portion and the cover portion are connected by a hinge portion, and the cover portion is configured to rotate around the hinge portion to open the through hole, and the valve member includes a cylindrical body and a moving body, the cylindrical body There is a cavity portion, the cavity portion is provided so that the intermediate space communicates with the external space, the moving body is accommodated to be movable within the cavity portion, the cylinder body has a stopper portion, the stopper portion is When the moving body moves to the external space, it engages with the moving body and blocks air flow through the cavity. The stacked peeling container according to claim 17, wherein the angle between the inner surface of the main body portion and the inclined surface is 25.1 degrees or more. The stacked peeling container according to claim 17 or claim 18, wherein the moving body is spherical. The stacked peeling container according to claim 17 or claim 18, wherein the weight of the moving body is 0.0250 g or less. According to the stacked peeling container described in claim 20, the weight of the moving body is 0.0150 g or less. The stacked peeling container according to claim 17 or claim 18, wherein the diameter of the moving body is 2.356 mm to 2.406 mm.

Images