WO2019193808A1

WO2019193808A1 - Container assembly, method for manufacturing the same, and container

Info

Publication number: WO2019193808A1
Application number: PCT/JP2019/000991
Authority: WO
Inventors: 克彦相馬
Original assignee: 東罐興業株式会社
Priority date: 2018-04-06
Filing date: 2019-01-16
Publication date: 2019-10-10
Also published as: JP7143047B2; JPWO2019193808A1

Abstract

Provided is a container assembly 5 capable of ensuring the sealing property and the resealing property including a container 1 and a seal lid 2. A plurality of first incision lines 41 extending in the circumferential direction is formed in a flange portion 20 of the container 1 at intervals in the circumferential direction. A plurality of second incision lines 42 extending in the circumferential direction is formed in the seal lid 2 and the flange portion 20. The flange portion 20 is divided into an inner region 21 and an outer region 22 along the entire circumference by a cutting line 40 constituted by the first incision lines 41 and the second incision lines 42. The seal lid 2 is annularly and continuously fixed to the inner region 21 of the flange portion 20 in order to seal an accommodating portion 10 and is also fixed to the outer region 22. A portion of the seal lid 2 which exceeds the first incision lines 41 is provided as a connecting portion 2a which connects the inner region 21 and the outer region 22 of the flange portion 20.

Description

Container assembly, manufacturing method thereof and container

The present invention relates to a container assembly that can be resealed after opening, a manufacturing method thereof, and a container that is a main component of the container assembly.

The container assembly that contains the ingredients is required to be sealed to prevent the ingredients from being tampered with or deteriorated. In addition, when it is assumed that the food cannot be eaten in one meal, or when it is assumed that the food is consumed little by little, such as boiled or pickled, it is required that the food can be resealed after opening. .

As described above, a container assembly that requires sealing and resealability generally includes three parts, that is, a container, a sealing lid, and a resealing lid. The container has a housing part for containing foodstuffs and a flange part connected to the opening periphery of the housing part. The seal lid material is in the form of a film or a sheet, and after the container is filled with food, it is heat welded to the flange. The internal space of the housing portion is sealed by this heat welding. The reseal lid is detachably placed on the flange portion.

When removing the food from the container assembly, remove the reseal lid from the flange and peel off the seal lid from the flange. The seal lid material cannot be resealed after being peeled off from the flange portion, but can be resealed by covering the flange portion with the reseal lid again.

The container assembly requires a sealing lid member for sealing and a re-sealing lid in addition to the container, so that the manufacturing cost increases.
In the embodiment of FIG. 10 of Patent Document 1 and Patent Document 2, a container assembly including a container and a seal lid member is disclosed. The flange portion of the container is formed by drawing a continuous annular line that is to be cut by an external force, and the flange portion is divided into an inner region and an outer region by the planned cut line. The seal lid member is thermally welded to the inner region and the outer region of the flange portion.

In the container assemblies of

Patent Documents

1 and 2, the internal space of the housing portion is sealed by thermal welding between the seal lid material and the inner region of the flange portion. When opening, by applying force to pinch the outer area of the flange part and the seal cover material with your fingers and fold it upward, the flange part will be cut along the planned cutting line, and the seal cover material and the inner area of the flange part will Release the welded state. Thereby, it isolate | separates into the container main body which consists of a storage part and the inner area | region of a flange part, and the reseal lid | cover which consists of a sealing lid material and the outer area | region of a flange part.

At the time of resealing, the reseal lid is placed on the inner area of the flange portion of the container body.
As described above, the sealing lid material for sealing forms a reseal lid in cooperation with the outer region of the flange portion of the container after opening, so that the number of parts can be reduced without requiring a reseal lid separately. .

Japanese Patent No. 5700163 JP 2018-39573 A

In the container assembly of

Patent Documents

1 and 2, when the planned cutting line formed on the flange part of the container is formed by perforations, the flange part is torn off with a relatively strong force along the planned cutting line when opened. Since it is necessary, the opening operation is complicated.

In order to avoid the inconvenience described above, the cutting planned line is constituted by dotted joints and cut lines arranged at intervals in the circumferential direction, and the inner area and the outer area of the flange portion are connected relatively weakly. Is also possible. However, in that case, there is a possibility that the outer region of the flange portion may drop off in the process of transporting the container to the factory where the container is filled with the contents. Further, since the support of the outer region is unstable, there is a possibility that the filling of the contents and the welding (adhering) of the sealing lid material may be hindered.
In addition, even if the planned cutting line has any of the configurations described above, a burr-like trace remains on the outer peripheral edge of the inner region of the flange portion separated at the time of opening, and the appearance is impaired.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and includes a container assembly having a container, a container having a flange connected to the opening periphery of the container, and a sealing lid member for sealing the container. In
A plurality of first cut lines extending in the circumferential direction are formed at intervals in the circumferential direction in the flange portion of the container, and a plurality of extending in the circumferential direction are formed in the flange portion of the seal lid member and the container. The second score line is disposed between the first score lines and connected to the first score line, and the flange portion is formed between the first score line and the second score line. It is separated into an inner region and an outer region over the entire circumference by a cutting line constituted by a lead-in wire, and the sealing lid material is continuously formed in an annular shape in the inner region of the flange portion in order to seal the housing portion. In addition to being fixed to be peeled off, it is also fixed to the outer region, and a portion of the seal lid member that exceeds the first cut line connects the inner region and the outer region of the flange portion. Provided as connecting part It is characterized in.

According to the above configuration, at the time of opening, the container body including the housing portion and the inner region of the flange portion and the regeneration lid including the outer region of the flange portion and the sealing lid material can be separated, and the sealing performance is reduced with a small number of parts. Resealability can be obtained.
Since the inner and outer regions of the flange part are separated over the entire circumference, no force is required to separate the flange part at the time of opening, and it is only necessary to release the fixation between the seal lid material and the inner region of the flange part. Opening work is easy.
In the opened container body, no burr-like traces remain on the outer periphery of the inner region, and the appearance is improved.
Since the second score line is formed in the flange portion and the seal lid material, it is possible to form the second score line even after the container is filled with the contents and sealed with the seal lid material. Before filling the object and fixing the seal lid to the flange, the outer area can be firmly connected to the inner area via the second cut line formation planned place, Can be prevented, and the filling of the contents and the fixing of the seal lid material can be performed stably.

Preferably, the outer peripheral edge of the inner region has a plurality of engagement edges defined by the plurality of first cut lines, and the outer region of the flange portion is engaged with the plurality of engagement edges. A plurality of engageable engagement structures are formed, and the engagement structures are arranged away from the engagement edge in a circumferential direction by a predetermined angle.
According to the above configuration, a stable re-sealing state can be obtained by rotating the regeneration lid from the position at the time of opening and engaging the engagement structure of the regeneration lid with the engagement edge of the container body.
More preferably, the engagement structure includes a hanging wall that hangs down from the outer region of the flange portion, and an engaging convex portion that is formed on the hanging wall and protrudes inward in the radial direction.

Preferably, the end portion of the first cut line and the end portion of the second cut line intersect each other and have an extension portion further extending from the intersection.
According to the said structure, the continuous cutting line can be formed reliably.

More preferably, an end of at least one of the first cut line and the second cut line is inclined radially outward, and the outer peripheral edge of the inner region is at the intersection. It becomes convex outward in the radial direction, and the extension of the first cut line and the second cut line is formed in the outer region.
According to the said structure, a score line does not remain in the inner side area | region of the flange part after opening, and an external appearance is good.

Another aspect of the present invention provides a method for manufacturing a container assembly,
And a plurality of first cut lines extending in the circumferential direction at intervals in the circumferential direction. Preparing a container in which the flange portion is partially separated into an inner region and an outer region by a score line;
Filling the container with the contents,
A step of fixing a seal lid member to the inner region of the flange portion so as to be continuously peelable in order to seal the housing portion, and also to be fixed to the outer region;
A plurality of second cut lines extending in the circumferential direction and arranged between the first cut lines and connected to the first cut lines are formed in the flange portion and the seal lid member, thereby forming the flanges. The part is separated into the inner region and the outer region over the entire circumference by a cutting line constituted by the first cutting line and the second cutting line, and the first cutting line in the seal lid member Providing a crossing site as a connecting portion for connecting the inner region and the outer region;
It is provided with.

Still another aspect of the present invention is a container having a housing portion and a flange portion connected to the opening periphery of the housing portion.
A plurality of first score lines extending in the circumferential direction are formed in the flange portion at intervals in the circumferential direction, and the flange portion is partially separated into an inner region and an outer region by the first score line. The inner region has a plurality of engaging edges defined by the plurality of first cut lines, and the outer region of the flange portion can be engaged with the plurality of engaging edges, respectively. A plurality of engaging structures are formed, and the engaging structures are arranged away from the engaging edge portion by a predetermined angle in the circumferential direction.

Preferably, the first cut line is formed in a ridge shape convex in the radially outward direction, and both end portions thereof are inclined toward the radially outward direction.

According to the present invention, sealability and resealability can be obtained with a small number of parts, the opening operation of the sealing lid material is easy, the appearance of the container body after opening is good, and the sealing lid material The flange portion of the container can be stably supported before mounting.

It is a top view of the container concerning one embodiment of the present invention. It is sectional drawing which follows the II-II line | wire of FIG. 1, and shows exaggerating thickness. It is a top view of the container assembly comprised by welding a sealing cover material to the said container. FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. 3, exaggerating the thickness. It is a principal part enlarged plan view of FIG. 3, and shows the crossing state of a 1st cut line and a 2nd cut line. It is a top view which shows the state which isolate | separated the said container assembly into the container main body and the reproduction | regeneration lid | cover. FIG. 5 is a view corresponding to FIG. 4 showing the container body and the regeneration lid. It is a top view which shows the state which resealed the said container main body with the said reseal lid. It is a principal part enlarged plan view which shows the said reseal state. FIG. 10 is an enlarged cross-sectional view of a main part taken along line XX in FIG.

Hereinafter, a container assembly constituting an embodiment of the present invention will be described with reference to the drawings. As shown in FIGS. 3 and 4, the container assembly 5 includes a container 1 and a seal lid member 2. The container 1 is obtained by vacuum press molding a resin sheet such as PS, PP, or PET. The seal lid member 2 is made of, for example, a resin film or a resin sheet.

As shown in FIGS. 1 and 2, the container 1 includes a housing portion 10, a flange portion 20 that continues to the opening peripheral edge 10 a of the housing portion 10 and projects outward in the radial direction, and a lower portion from the outer peripheral edge 20 a of the flange portion 20. And an annular hanging wall 30 projecting into a single body.

The housing part 10 has a bottom part 11 and a body part 12. A raised portion 25 that draws an annular line is formed on the flange portion 20. The raised portion 25 is slightly raised upward (for example, about 0.5 mm) from the flange portion 20.

The bottom part 11, the body part 12, the opening peripheral edge 10a and the annular raised part 25 of the container 10 of the container 1 are regular octagons, the respective sides are parallel, and the respective corners are at the same angular position. However, in the bottom part 11, the trunk | drum 12, and the opening periphery 10a, one corner | angular part is missing and it swells inside. Corresponding to this bulging shape, the flange portion 20 is formed with a wide display portion 26 inside the raised portion 25, and an arrow Ma is displayed on the display portion 26 as an alignment mark to be described later. .

The outer peripheral edge 20 a of the flange portion 20 and the hanging wall 30 have an irregular octagon shape, and the corner portion is at the same angular position as the corner portion of the raised portion 25. The eight corners of the container 1 are composed of every other four first corners C1 and four other second corners C2.
The distance between the outer peripheral edge 20a of the flange part 20 at the first corner C1 and the central axis L of the housing part 10 is longer than the distance between the outer peripheral edge 20a and the central axis L at the second corner C2. It has become.

The outer peripheral edge 20a of the flange portion 20 at one first corner portion C1 bulges outward in the radial direction, whereby the flange portion 20 has a tab 27 that serves as a knob at the time of opening. Also on this tab 27, an arrow Mb is displayed as an alignment mark.

As shown in FIG. 1, a continuous first cut line 41 extending in the circumferential direction is formed in the flange portion 20 for each first corner portion C1. The first cut line 41 partially separates the flange portion 20 into an inner region 21 and an outer region 22. The first score line 41 partially defines the outer peripheral edge of the inner region 21. The raised portion 25 is formed in the inner region 21.

The first cut line 41 has a mountain shape that is convex outward in the radial direction, and the outer peripheral edge of the inner region 21 has a mountain portion spaced apart in the circumferential direction correspondingly. The top of the first cut line 41 is recessed, and correspondingly, an engagement recess 21 a is formed on the top of the chevron of the inner region 21. Both sides of the engaging recess 21a are provided as a pair of engaging edge portions 21b having an action to be described later in the crest portion of the outer peripheral edge of the inner region 21.

The hanging wall 30 provides an engagement structure 35 for each second corner C2. The engagement structure 35 is separated from the first cut line 41 by 45 ° in the circumferential direction, and is formed at a corner portion of the hanging wall 30 and has an engagement bulging portion 31 for rotation prevention that bulges radially inward. Further, on both sides of the engagement bulge portion 31, there is an engagement convex portion 32 that linearly extends along the side portion of the hanging wall 30 and projects radially inward.

The engagement bulging portion 31 of the engagement structure 35 has a shape corresponding to the engagement recess 21a of the inner region 21, and the distance from the central axis L is equal to or slightly longer than the engagement recess 21a.
The distance from the central axis L of the two sides of the hanging wall 30 in the engaging structure 35 is equal to or slightly longer than the pair of engaging edge portions 21b, and the distance from the central axis L of the pair of engaging convex portions 32. Is slightly shorter than the pair of engaging edges 21b.

The skirt portion of the first cut line 41 is gently inclined so as to gradually approach the central axis L as it is away from the top portion, but its end portion 41a is directed radially outward as it is away from the top portion. It is inclined to.

The container 1 having the above configuration is transported to a factory that is filled with contents such as ingredients. After the container 10 is filled with the contents in this factory, the container 10 is sealed by the seal lid member 2 as shown in FIGS. More specifically, a resin film or sheet is thermally welded (fixed) to the raised portion 25 of the flange portion 20, and is also annularly welded (fixed) to the outer region 23 of the flange portion 20. By cutting this film or sheet along the outer peripheral edge 20a of the flange portion 20, the seal lid member 2 is obtained. Since the heat welding region between the seal lid member 2 and the raised portion 25 is narrow, the seal lid member 2 can be peeled off from the raised portion 25.

The inner region 21 and the outer region 22 of the flange portion 20 of the container 1 are partially separated by a plurality of first cut lines 41, but are firmly connected at a portion between the first cut lines 41. Yes. Therefore, it is possible to reliably prevent the outer region 22 from being detached in the process of transporting the container 1 to the factory where the contents are filled. Moreover, since the outer region 22 is stably supported, the filling of the contents and the welding of the seal lid member 2 can be performed satisfactorily and smoothly.

The sealing lid material 2 is continuously welded to the annular raised portion 25 of the inner region 21 over the entire circumference, so that the internal space of the accommodating portion 10 is sealed, and the contents such as food can be prevented from being falsified and deteriorated. .

2nd cut line 42 is formed in flange part 20 and seal lid material 2 of container 1 which were piled up in the 2nd corner C2 after welding of the above-mentioned seal lid material 2. The second cut line 42 extends continuously in the circumferential direction to form a gentler mountain shape than the first cut line 41, and its skirt portion is substantially straight.

3 to 5, the second cut line 42 is indicated by a solid line, but the first cut line 41 is indicated by a broken line because it is covered with the seal lid 2. The said 1st cut line 41 and the 2nd cut line 42 are alternately arrange | positioned in the circumferential direction, and are providing the cyclic | annular cutting line 40 continuous over the perimeter by mutually connecting. Therefore, the flange portion 20 of the container 1 is separated into an inner region 21 and an outer region 22 over the entire circumference by the cutting line 40.
Since the sealing lid member 2 is welded to the raised portion 25 located inside the cutting line 40, the sealing function of the accommodating portion 10 is maintained.

As shown in FIG. 5, the end 41 a of the first cut line 41 and the end 42 a of the second cut line 42 cross each other and further extend from the intersection P. Thereby, the cutting line 40 can be reliably continued.
Since the end 41a of the first cut line 41 is inclined in the radially outward direction, an extension from the intersection P of the

ends

41a and 42a of the cut lines 41 and 42 is formed in the outer region 22. It will be. On the other hand, in the outer peripheral edge of the inner region 21, the portion defined by the first cut line 41 and the second cut line 42 in the vicinity of the intersection P becomes a convex portion 21c that protrudes in the radially outward direction. .

As described above, the sealing lid member 2 is separated at the second cut line 42 into an inner portion and an outer portion. However, since the 1st cut line 41 is formed only in the flange part 20 of the container 1, and is not formed in the seal cover material 2, the seal cover material 2 is connected to the connection part 2a ( 3). The outer region 22 and the inner region 21 of the flange portion 20 are connected via the connecting portion 2a of the seal lid member 2, and the outer region 22 is stably supported.

In addition, formation of the 2nd cut line 42 may be performed simultaneously with the cutting process of the outer periphery of the seal cover material 2, and may be performed before and after that. The formation of the second cut line 42 may be performed simultaneously with the welding process of the seal lid member 2.

As described above, the user who has purchased the container assembly 5 containing the contents such as ingredients can open the container 1 and take out the contents. Specifically, the outer region 22 of the flange portion 20 is pulled up by holding the tab 27. As a result, the welded state between the raised portion 25 and the seal lid member 2 is released, and the outer region 22 is separated from the inner region 21. As a result, as shown in FIGS. 6 and 7, the container assembly 5 is separated into the container main body 1A and the reseal lid 2A.

The container main body 1A has a configuration in which the inner region 21 of the flange portion 20 of the container 1 is left and the outer region 22 and the hanging wall 30 are removed.
The reseal lid 2 </ b> A includes an outer region 22 of the flange portion 20 of the container 1, a hanging wall 30, and the seal lid member 2. In the reseal lid 2A, the seal lid material 2 has flexibility, but the outer region 22 of the flange portion 20 is part of the container 1 in the initial state, which is a molded product, and can be elastically deformed. It has the shape-retaining property (predetermined rigidity) and plays the role of the frame of the reseal lid 2A.

At the time of opening, since the flange portion 20 is completely separated into the inner region 21 and the outer region 22 in advance by the cutting line 40, the force for separating them is unnecessary, and the opening operation can be performed easily. .

Further, when the inner region 21 and the outer region 22 are separated, the perforation is not torn as in the conventional case, so that a burr-like trace is formed on the outer peripheral edge of the inner region 21 which is the flange portion of the container body 1A. Does not remain. Moreover, it becomes the convex part 21c at the intersection P of the 1st cut line 41 and the 2nd cut line 42, and the extension part of the

edge parts

41a and 42a of these

cut lines

41 and 42 is not formed in the inner side area | region 21. . Therefore, a good appearance of the container body 1A can be ensured.

After opening, the container 10 of the container body 1A can be resealed by the reseal lid 2A. Specifically, as shown in FIG. 8, the arrow Mb of the reseal lid 2A is aligned with the arrow Ma of the container body 1A. That is, the reseal lid 2A is rotated 135 ° with respect to the container body 1A from the position before separation. Thereby, the engagement bulging part 31 for every four 1st corner | angular parts C1 of the reseal lid 2A is aligned with the engagement recessed part 21a of the inner side area | region 21 of 1 A of container main bodies, and a pair of engagement convex part 32 is set. And the pair of engaging edges 21b of the inner region 21 of the container body 1A.

When the reseal lid 2A is pressed against the container main body 1A in the above alignment state, as shown in FIG. 10, the engagement of the inner region 21 of the container main body 1A with the elastic deformation of the container main body 1A and the reseal lid 2A. The edge portion 21 b passes over the engaging convex portion 32 of the reseal lid 2 </ b> A and reaches between the engaging convex portion 32 and the outer region 22. As a result, the outer region 22 of the reseal lid 2A overlaps the inner region 21 of the container body 1, and a reseal state in which the reseal lid 2A covers the opening of the accommodating portion 10 of the container body 1A is obtained.

The re-sealing lid 2A can stably maintain the resealing state because the engaging convex portion 32 is locked to the engaging edge portion 21b and the axial movement is prohibited. Moreover, as shown in FIG. 9, since the engagement bulging part 31 of the reseal lid 2A fits into the engagement recess 21a of the inner region 21 of the container body 1A, the reseal lid 2A is also prohibited from rotating.

The present invention is not limited to the above embodiment, and various aspects can be adopted.
The shape of the accommodating part 10, the flange part 20, and the hanging wall 30 can be variously selected from polygons of even angles including four corners and hexagons, other polygons, circles, and ellipses.
The engagement structure formed in the outer region of the flange portion may be a hollow convex portion that protrudes downward between the inner peripheral edge and the outer peripheral edge of the outer region. The wall on the radially inner side of the convex portion is provided as a hanging wall, and the engaging convex portion is formed on the wall.
The reseal lid may be resealed simply by placing it without engaging the container body.
In the above embodiment, the container body and the seal lid member are made of resin, but either one or both may be a material other than resin, such as paper or metal.

The present invention can be applied to a container assembly that is filled with food and the like.

Claims

A container assembly including a container (1) having a housing part (10), a flange part (20) connected to an opening peripheral edge (10a) of the housing part, and a sealing lid member (2) for sealing the housing part. In
In the flange portion (20) of the container (1), a plurality of first cut lines (41) extending in the circumferential direction are formed at intervals in the circumferential direction,
In the flange portion (20) of the seal lid member (2) and the container (1), a plurality of second cut lines (42) extending in the circumferential direction are disposed between the first cut lines. And formed to be continuous with the first cut line,
The flange portion (20) includes an inner region (21) and an outer region (over the entire circumference) by a cutting line (40) constituted by the first cutting line (41) and the second cutting line (42). 22),
The seal lid member (2) is attached to the inner region (21) of the flange portion (20) so as to be continuously peelable and peelable to seal the housing portion (10). It is also fixed to the outer region (22),
A connecting portion (2a) for connecting the inner region (21) and the outer region (22) of the flange portion (20) at a portion exceeding the first cut line (41) in the seal lid member (2). A container assembly characterized by being provided as:
The outer peripheral edge of the inner region (21) has a plurality of engagement edges (21b) defined by the plurality of first cut lines (41), and the outer region (22) of the flange portion (20). ) Is formed with a plurality of engagement structures (35) that can be engaged with the plurality of engagement edges, and the engagement structures are arranged apart from the engagement edges in the circumferential direction by a predetermined angle. The container assembly according to claim 1.
The engagement structure (35) includes a hanging wall (30) that hangs down from the outer region (22) of the flange portion (20), and an engaging protrusion that is formed on the hanging wall and protrudes radially inward. (32) The container assembly according to claim 2.
The end part (41a) of the first cut line (41) and the end part (42b) of the second cut line (42) cross each other, and have an extension part further extending from the intersection (P). The container assembly according to any one of claims 1 to 3, wherein the container assembly is provided.
An end (41a) of at least one of the first cut line (41) and the second cut line (42) is inclined radially outward, and the inner region (21 ) Is radially outward at the intersection (P), and the extension of the first cut line and the second cut line is formed in the outer region (22). The container assembly according to claim 4.
The housing portion (10) has a flange portion (20) connected to the opening periphery (10a) of the housing portion, and a plurality of first cut lines (41) extending in the circumferential direction are provided around the flange portion. Providing a container (1) formed at intervals in a direction and having the flange portion partially separated into an inner region (21) and an outer region (22) by the first cut line;
Filling the container (1) with the contents (10);
A sealing lid member (2) is attached to the inner region (21) of the flange portion (20) so as to be continuously peelable and peelable to seal the housing portion (10). Fixing to the region (22);
A plurality of second cut lines extending in the circumferential direction in the flange portion (20) and the seal lid member (2) and arranged between the first cut lines (41) and continuing to the first cut lines. (42) is formed, whereby the flange portion is connected to the inner region (21) and the outer side over the entire circumference by a cutting line (40) constituted by the first cutting line and the second cutting line. Separating the region (22) and providing a portion of the seal lid member (2) that exceeds the first cut line as a connecting portion (2a) for connecting the inner region and the outer region; ,
A method for manufacturing a container assembly, comprising:
In a container having a housing part (10) and a flange part (20) connected to the opening periphery (10a) of the housing part,
A plurality of first cut lines (41) extending in the circumferential direction are formed in the flange section (20) at intervals in the circumferential direction, and the flange section is formed in the inner region (21) by the first cut lines. And partially separated into the outer region (22),
The inner region (21) has a plurality of engagement edges (21b) respectively defined by the plurality of first cut lines (41), and is formed in the outer region (22) of the flange portion (20). Are formed with a plurality of engagement structures (35) that can be respectively engaged with the plurality of engagement edges, and the engagement structures are arranged away from the engagement edges by a predetermined angle in the circumferential direction. A container characterized by that.
The first cut line (41) is formed to have a mountain shape convex in the radially outward direction, and both end portions (41a) are inclined toward the radially outward direction. Container as described in.