TW202413223A - Lid, container with lid, combination of lid and container - Google Patents

Abstract

The present invention provides a lid, a container with the lid attached, and a combination of the lid and the container. When the types of the lid size are less than the types of the container size and the sizes of the opening of the container to which the lid is attached are various, even if there is a difference in the size of the lid and the edge of the container, resulting in a change in the distance from the outer periphery of the lid to the opening of the container, the container with the lid attached can be easily carried by holding the edge of the container. The lid body is formed in a manner capable of being joined to a container, the container having an opening portion formed at an upper end and an edge portion forming the outer periphery of the above-mentioned opening portion, the above-mentioned lid body having: a joining area corresponding portion, which corresponds to an area joined to the above-mentioned container along the above-mentioned edge portion; a lid area corresponding portion, which is composed of a portion located on the inner side relative to the inner periphery of the above-mentioned joining area corresponding portion; and an outer side area corresponding portion, which includes the above-mentioned joining area corresponding portion and is composed of a portion located on the outer side relative to the inner periphery of the above-mentioned joining area corresponding portion, when the above-mentioned outer side area corresponding portion and the above-mentioned joining area corresponding portion are divided by a line segment when the above-mentioned outer side area corresponding portion is viewed from above. The line segment is a line segment connecting the center position defined as the center of the cover area corresponding part and the outer periphery of the outer area corresponding part, and the part dividing the outer area corresponding part is set as the first dividing part, and the part dividing the joint area corresponding part is set as the second dividing part, and when the line segment that makes the length of the first dividing part the smallest is used as the reference line segment, the outer area corresponding part is configured to meet the following conditions: a plurality of similar shapes with different diameters are defined, and these similar shapes pass through a common point defined at the position of the reference line segment and the position of the second dividing part and are contained in the area of the outer area corresponding part.

Description

Cover, container with cover, and combination of cover and container

The present invention relates to a cover, a container with the cover, and a combination of the cover and the container.

The practice of housing food and drinks (hereinafter also referred to as "contents") in a container having an opening formed at an upper end and attaching a lid to provide the contents in a sealed state is widely practiced.

As a lid body mounted on a container, from the viewpoint of reducing the environmental burden, it is required to use a lid body used for paper materials. As a method of mounting a lid body on a container, Patent Document 1 proposes a method of joining the lid body to an edge formed by the outer periphery of the opening portion at the upper end of the container using a heat sealing method or a heat pressure method. Prior Art Document Patent Document

Patent document 1: Japanese Patent Application Publication No. 2011-219116

Depending on the temperature of the contents of the container, when picking up a container with a lid, the user may hold the edge of the container to carry it. For example, when the contents of the container are liquids such as hot coffee, the container becomes hot, and when picking up the container with a lid, the user may hold the edge of the container to carry it.

Regarding the combination of the lid and the container, when the types of the sizes of the lid are less than the types of the sizes of the container and when the sizes of the opening of the container to which the lid is mounted are various, due to the combination of the lid and the container, the difference between the size of the lid and the size of the edge of the opening of the container may become larger, and the distance difference between the outer peripheral edge of the lid and the edge of the opening of the container may become larger, resulting in that when the container with the lid is carried by holding the edge of the container, it may be difficult to grasp the edge. In particular, when the lid is formed of a paper material, unexpected folds and deformation portions may be formed on the entire outer edge of the lid, which may make the edge of the container more difficult to hold when carrying the container. On the other hand, when the difference between the size of the lid and the size of the edge of the opening of the container is the same, it is easy to hold the edge of the container when carrying the container with the lid. However, if the content of the container is a hot liquid or the like as described above, heat is transferred to the edge of the container, causing the temperature of the edge to rise, which may become an obstacle when carrying the container with the lid.

One of the objects of the present invention is to provide a cover. That is, to provide a cover that can easily hold the edge of the container and carry the container with the cover attached, even if there is a difference in the size of the edge of the cover and the container, resulting in a change in the distance from the outer periphery of the cover to the opening of the container. In addition, to provide a cover that can reduce the risk of difficulty in carrying the container due to the temperature rise of the edge.

The present invention is based on the following inventions (1) to (19).

(1) A cover body formed in a manner capable of being joined to a container, the container having an opening formed at an upper end and an edge forming the outer periphery of the opening, the cover body having: a joining area corresponding portion corresponding to an area along the edge of the container where the cover body joins to the container; a cover area corresponding portion consisting of a portion located on the inner side relative to the inner periphery of the joining area corresponding portion; and an outer side area corresponding portion including the joining area corresponding portion and consisting of a portion located on the outer side relative to the inner periphery of the joining area corresponding portion, when the outer side area corresponding portion is viewed from above, In the case where the outer area corresponding part and the joint area corresponding part are divided by a line segment, the line segment is a line segment connecting the center position defined as the center of the cover area corresponding part and the outer periphery of the outer area corresponding part, and the portion dividing the outer area corresponding part is set as the first dividing part, and the portion dividing the joint area corresponding part is set as the second dividing part, and the line segment that makes the length of the first dividing part the smallest is used as the reference line segment, the outer area corresponding part is configured to meet the following conditions: A plurality of similar shapes with different diameters are defined, and these similar shapes pass through a common point defined at the position of the reference line segment and the position of the second dividing portion and are contained in the area of the corresponding portion of the outer region. (2) A lid according to (1), wherein the reference line segment sets the difference between the length of the first dividing portion and the length of the second dividing portion to a minimum. (3) A lid according to (1), wherein the line segment passing through a predetermined area of the corresponding portion of the outer region corresponds to the reference line segment. (4) A cover body according to (1) above, wherein, when a straight line is set as a dividing straight line, which extends along the surface direction of the joint area corresponding part and in a direction perpendicular to the extension direction of the reference line segment and passes through the center of the cover area corresponding part to divide the outer area corresponding part, and in the outer area corresponding part divided by the dividing straight line, a portion including a position of the outer area corresponding part corresponding to the reference line segment is set as the first portion, and a portion other than the first portion is set as the second portion, the area of the second portion is larger than the area of the first portion. (5) The cover according to (4) above, wherein, the first part is formed such that the length of the first dividing portion becomes longer as the first dividing portion is located farther from the reference line segment along the outer periphery of the outer region corresponding portion. (6) The cover according to (1) above, wherein, an extension portion is formed in the outer region corresponding portion. (7) The cover according to (1) above, wherein, a groove portion is formed in the cover region corresponding portion. (8) The cover according to (1) above, wherein, an insertion port is formed in the cover region corresponding portion. (9) A cover body according to (8) above, wherein: In the cover area corresponding portion, a fragile portion is provided as the insertion port to guide the separation position in the cover area corresponding portion, The fragile portion has a plurality of penetration portions and at least one continuous portion formed between at least two of the penetration portions. (10) A cover body according to (1) above, wherein: The cover area corresponding portion has: a base having a small opening portion having an opening area smaller than the opening portion of the container; a small cover portion for opening and closing the small opening portion; and a hinge portion for connecting the base and the small cover portion, The small cover portion is configured to be rotatable relative to the base with the hinge portion as an axis. (11) The lid according to (10), wherein a gripping portion is provided on the upper surface side of the small lid. (12) The lid according to (11), wherein the gripping portion has a pull-tab component, and the pull-tab component is joined to the upper surface side of the small lid. (13) The lid according to (1), wherein the lid is formed of a paper material. (14) The lid according to (1), wherein the plurality of similar shapes are a plurality of circles having different diameters. (15) The lid according to (1), wherein the lid has a breathable sheet, and at least a portion of the breathable sheet is provided on at least a portion of the corresponding portion of the lid region. (16) A lid according to (1), having a window, wherein the window is formed in at least a portion of the lid region corresponding portion. (17) A lid according to (1), wherein, when the narrowest position of the width of the joint region corresponding portion in the joint region corresponding portion is set as the narrow portion reference position, a portion having a width that is more than twice the width of the narrow portion reference position is set as an expanded portion, and a portion other than the expanded portion is set as a non-expanded portion, a plurality of expanded portions and non-expanded portions are formed respectively. (18) A container with a lid, comprising: the lid according to (1); and the container, wherein the container has the opening formed at the upper end, and the lid is joined to the container. (19) A combination of a lid and a container, comprising: The lid described in (1) above; and The container, wherein the container has the opening formed at the upper end. Effect of the invention

According to the present invention, the following cover, container with cover attached, and combination of cover and container are provided. According to the cover, container with cover attached, and combination of cover and container of the present invention, when the types of sizes of the cover are less than the types of sizes of the container and when the sizes of the opening of the container to which the cover is mounted are various, even if there is a difference in the sizes of the edges of the cover and the container, resulting in a change in the distance from the outer periphery of the cover to the opening of the container, the container with cover attached can be easily carried by holding the edge of the container. In addition, according to the present invention, the following cover can be provided, which can reduce the hidden danger of difficulty in carrying the container due to the increase in temperature of the edge of the container.

The lid of the present invention is described in detail below based on the drawings. In addition, the lid of the present invention is described by taking a lid used for a container (cup) for various beverages such as a coffee cup as an example, but is not limited to a lid for a container for beverages, and can also be applied as a lid for a container for food other than beverages. In addition, the lid of the present invention can also be applied to containers that can accommodate various items other than beverages and food, such as parts such as bolts and nuts, and items other than the above. Moreover, the lid of the present invention is described below using an example in which the shape when viewed from above is circular, but the shape of the lid is not limited to a circular shape when viewed from above, and can also be applied to various shapes other than a circular shape, such as an elliptical shape, a rectangular shape, a triangular shape, a chamfered rectangular shape, a chamfered polygonal shape, and the like.

Hereinafter, the first to ninth embodiments and applicable examples of the present invention will be described with reference to the drawings in sequence. In this specification and drawings, components having substantially the same functional structure are denoted by the same drawing reference numerals to omit repeated descriptions.

The following description is a preferred embodiment of the present invention, and the content of the present invention is not limited to these embodiments, etc. In addition, in the following description, the front and back, left and right, up and down directions and the horizontal direction are shown for the convenience of explanation, but the content of the present invention is not limited to these directions.

[1 First embodiment] [1-1. Structure] The lid 1 of the first embodiment is formed so as to be able to cover the opening 102 relative to the container 101 having the opening 102 and to be able to join the container 101. As described later using A and B of FIG. 14, the lid 1 is formed so as to be able to join with the container, which has the opening 102 formed at the upper end and the edge 103 that forms the upper end edge of the outer periphery of the opening 102. A and B of FIG. 14 are a perspective view and a cross-sectional view of an example of a container 150 with a lid attached after joining the lid 1 shown in A and B of FIG. 1 to the container 101. The lid 1 can be used by joining along the edge 103. In the lid body 1, when the lid body 1 is viewed from above, the area joined to the edge 103 is called the joining area R. A of FIG1 is a top view showing an embodiment of the lid body 1. B of FIG1 is a cross-sectional view showing an embodiment of the lid body (a longitudinal cross-sectional view along the A-A line in A of FIG1). In addition, as the container 101, it is preferred to use a container having flexibility at the edge 103 of the opening 102. However, these descriptions do not prohibit the container 101 from being a container having little flexibility or being considered to have almost no flexibility, such as a metal container.

In the example of FIG. 1 , the joining region R corresponds to a region formed in a substantially annular shape along the opening 102 of the container 101 in a shape corresponding to the opening 102 .

The cover 1 preferably includes or is formed of a paper material. In the example of Fig. 1 , the cover 1 is formed of a sheet member, and the sheet member includes or is formed of a paper material.

(Paper materials) As paper materials, in addition to materials consisting only of pulp, materials including non-pulp natural fibers, synthetic fibers, recycled fibers and other fibers may also be used, but preferably, pulp contains 50% by mass or more, more preferably, 70% by mass or more, still more preferably, 80% by mass or more, and particularly preferably, 100% by mass of pulp is preferably used. Paper materials can use films of synthetic resins and natural resins, non-woven fabrics, wood-based raw materials such as wood foil, and composite materials with raw materials such as aluminum foil can also be used, but when a composite material is used, the composite material as a whole preferably contains 50% by mass or more of pulp, and particularly preferably, 80% by mass or more of pulp. The higher the pulp content, the easier it is for the paper material to biodegrade, and thus it is better.

As shown in A and B of FIG. 1 , the cover body 1 has a joint region corresponding portion 5A, a cover region corresponding portion 5B, and an outer side region corresponding portion 5C.

(Jointing area corresponding portion) The joining area corresponding portion 5A is a portion of the lid 1 corresponding to the area where the lid 1 is joined to the container 101 along the edge 103 of the container 101. That is, the joining area corresponding portion 5A is a portion of the lid 1 corresponding to the joining area R (the area facing the edge 103 of the container 101 and joined to the container 101). The joining area corresponding portion 5A is a portion of the lid 1 where the joining portion 151 between the lid 1 and the container 101 is formed in the lid-attached container 150. Specifically, when the lid 1 is viewed from above (in the example of A in FIG. 1 , with the Z-axis direction (up and down direction) as the viewing direction), the portion forming the joining area R is defined as the joining area corresponding portion 5A. The joining area corresponding portion 5A is usually formed in a ring shape as shown in A in FIG. 1 . In particular, as shown in A of FIG. 1 , when the edge 103 of the container 101 is roughly formed into a circular ring shape, the joint area R is formed into a circular ring shape, and the joint area corresponding portion 5A is also roughly formed into a circular ring shape when the lid 1 is viewed from above. The outer edge of the joint area corresponding portion 5A is determined according to the position of the outer edge of the joint area R. The outer edge 51 of the joint area corresponding portion 5A can be located at the outer periphery of the lid 1, or it can be located inside compared to the outer periphery of the lid 1 as shown in the example of A of FIG. 1 . When the joint area R of the lid 1 and the container 101 is not formed continuously, the portion sandwiched by the adjacent joint areas R and facing the edge 103 is also included in the joint area corresponding portion 5A described later.

(Lid area corresponding part) The lid area corresponding part 5B is a part that covers the opening part 102. In the example of FIG. 1 , the lid area corresponding part 5B is a part of the lid body 1 that is located on the inner side relative to the inner periphery 52 of the joint area corresponding part 5A. The lid area corresponding part 5B is a part that covers the opening part 102 in the container 150 with a lid body. In addition, the part that covers the opening part 102 refers to a part that covers at least a part of the opening part 102, including the case where there is a small opening part 66 as described in the third embodiment.

(Outer area corresponding portion) In addition, as shown in the example of A in FIG. 1 , the portion outside the cover area corresponding portion 5B of the cover body 1 is the outer area corresponding portion 5C. The outer area corresponding portion 5C includes the joint area corresponding portion 5A and is composed of a portion located outside the inner periphery 52 of the joint area corresponding portion 5A.

The outer region corresponding portion 5C is configured to satisfy the following conditions defined based on the first dividing portion 6, the second dividing portion 7, the reference line segment MP defined by the first dividing portion 6, and the similar shape SH.

The condition is that a plurality of similar shapes SH having different proportions are defined, and these similar shapes SH pass through a common point defined at the position of the reference line segment MP and the position of the second dividing portion 7 and are contained within the region of the outer region corresponding portion 5C.

Among them, the above-mentioned first dividing portion 6, the second dividing portion 7, the reference line segment MP, and the similar shape SH are defined as follows.

(First dividing portion and second dividing portion) Regarding the first dividing portion 6 and the second dividing portion 7, as shown in FIG2A, when the outer region corresponding portion 5C is viewed from above, it is assumed that the outer region corresponding portion 5C and the joint region corresponding portion 5A are divided by a line segment M, which is a line segment connecting the center position C specified as the center of the cover region corresponding portion 5B and the outer periphery 53 of the outer region corresponding portion 5C. At this time, the portion dividing the outer region corresponding portion 5C is defined as the first dividing portion 6. In addition, as shown in FIG2A, the portion (the portion of the line segment) dividing the joint region corresponding portion 5A is defined as the second dividing portion 7.

(Baseline segment) Baseline segment MP is defined as the segment M that minimizes the length of the first dividing portion 6. Baseline segment MP is preferably defined as the segment that minimizes the difference between the length of the first dividing portion 6 and the length of the second dividing portion 7. In A of FIG. 2 , the position of the outer periphery 53 of the outer region corresponding portion 5C corresponding to the baseline segment MP is indicated by position N.

(Similar shapes) As the similar shapes SH indicated by the above-mentioned "conditions", a circle can be cited as an example. In the example of A in FIG2 , the "plural similar shapes" indicated by the condition are a plurality of circles SC1, SC2, etc. having different diameters. That is, in the example shown in A in FIG2 , a position N on the outer periphery 53 of the outer region corresponding portion 5C is defined as the position where the first dividing portion 6 is minimized, and a line segment connecting the center position C of the cover region corresponding portion 5B and the position N is defined as the reference line segment MP. Furthermore, when the designated position N1 is defined as a position defined by the position of the reference line segment MP and the position of the second dividing portion 7, the outer region corresponding portion 5C is formed so that a plurality of circles SC1 and SC2 having different diameters (diameters) can exist as circles passing through the designated position N1 and being contained in the region of the outer region corresponding portion 5C. At this time, the designated position N1 exists as a position where the circles SC1 and SC2 having different diameters pass through in common.

(Length of the first dividing portion) It is preferable that the first dividing portion 6 is formed so that the further away from the reference line segment MP along the outer periphery 53 of the outer region corresponding portion 5C (in FIG. 2 , the further away from the position N in the direction of arrows F1 and F2), the longer the length of the first dividing portion 6 becomes. When the outer region corresponding portion 5C is divided into the first part 8 and the second part 9 as described later, it is preferable that at least in the first part 8, the first dividing portion 6 is formed so that the further away from the reference line segment MP along the outer periphery 53 of the outer region corresponding portion 5C, the longer the length of the first dividing portion 6 becomes. If formed in this way, it is easier to form the outer region corresponding portion 5C in a manner that allows a plurality of similar shapes SH to exist.

In the cover 1 of the first embodiment, as shown in B of Fig. 2, it is preferable that the area of the first portion 8 and the area of the second portion 9 divided by the outer region corresponding portion 5C have a specific size relationship. Fig. 2B is a top view for explaining the first portion 8 and the second portion 9.

(Part 1 and Part 2) Part 1 8 and Part 2 9 are parts of the outer region corresponding part 5C defined under the assumption that the outer region corresponding part 5C is divided by the dividing straight line NP. Part 1 8 is defined as a part of the outer region corresponding part 5C divided by the dividing straight line NP, including the position of the outer region corresponding part 5C corresponding to the reference line segment MP. In addition, Part 2 9 is defined as a part other than Part 1 8 (a part of the outer region corresponding part 5C different from Part 1 8).

(Dividing Line) The dividing line NP is a line extending along the surface direction of the joint region corresponding part 5A (in the example of B in FIG. 2 , the XY plane direction) and perpendicular to the extending direction of the reference line segment MP, and passing through the center (center position C) of the cover region corresponding part 5B to divide the outer region corresponding part 5C.

In the cover body 1 shown in Fig. 2B, the area of the second portion 9 is larger than the area of the first portion 8. With such a configuration, the outer region corresponding portion 5C can be easily defined so that even similar shapes SH with greatly different similarity ratios can be contained within the region of the outer region corresponding portion 5C.

[1-2. Manufacturing method] As a manufacturing method of the cover body 1, for example, a sheet (raw material sheet) formed of a material corresponding to the material of the cover body 1 is punched out according to the shape of the cover body 1 to manufacture a blank, and the blank is processed as needed to manufacture the cover body 1. In addition, the blank may be directly used as the cover body 1 without performing processing on the blank.

In addition, the processing applied to the blank can be exemplified by performing shaping processing such as concave-convex processing on the blank. In addition, the processing applied to the blank includes the case where the cover body is equipped with a pull-tab component and the like on the blank.

The raw material sheet is preferably composed of a fiber sheet including a paper material.

(Fiber sheet containing paper material) As fiber sheets containing paper material, there can be listed so-called paper obtained by taking a pulp of fiber raw material onto a net and drying or press-drying it, and then making it into a sheet, and so-called paper produced by piling fiber raw materials such as pulverized pulp obtained by pulverizing a raw material sheet composed of pulp-based fibers, etc. by a pulverizer, and fixing the fibers of the fiber stack to each other by an adhesive, etc., so-called airflow mesh sheets, etc., etc., etc. In addition, fiber sheets containing paper material include fiber sheets having a layered structure obtained by stacking a plurality of sheets of the above-mentioned paper. In addition, fiber sheets include sheets made of fibers other than paper pulp, such as chemical fibers, fibers with functions such as water resistance, metal fibers, and glass fibers, in addition to paper materials.

[1-3. Function and Effect] According to the present invention, when the types of the size of the lid 1 are less than the types of the size of the container 101, and when the size of the opening 102 of the container 101 to which the lid 1 is mounted is various, even if there is a difference in the size of the lid 1 and the edge 103 of the container 101, resulting in a change in the distance from the outer periphery of the lid 1 to the edge 103 of the opening 102 of the container 101, the container 150 with the lid attached can be easily carried by holding the edge 103 of the container 101.

In particular, when the lid is formed of a paper material, an unexpected fold may be formed on the entire outer edge of the lid, which may make the edge of the container more difficult to hold when the container is carried. In view of this, according to the present invention, the length of the first dividing portion 6 can be minimized at the position N. And when the difference between the first dividing portion 6 and the second dividing portion 7 is substantially eliminated at the position N, the position N can be set to a portion where it is difficult to generate a fold or a distortion portion when holding the edge 103 of the container 150 with the lid (a portion where the generation of a fold or a distortion portion is limited). Therefore, when carrying the container with a cap, the user can place the fingers at position N and its vicinity, thereby easily reducing the possibility of folds and deformation portions being generated on the cap at position N and its vicinity, thereby making it easier to carry the container.

[1-4. Variations] (Variation 1) In the cover 1 of the first embodiment, as shown in FIG3, the lengths of the first dividing portion 6 and the second dividing portion 7 specified when the line segment dividing the outer region corresponding portion 5C is the reference line segment MP can be made equal (the width of the outer region corresponding portion 5C at the position of the reference line segment MP is the same as the width of the joint region corresponding portion 5A). This embodiment is referred to as Variation 1 of the first embodiment. FIG3 is a top view of an embodiment of the cover 1 for illustrating Variation 1 of the first embodiment. In the cover 1 of the modification 1 of the first embodiment, the position N on the reference line segment MP is a position on the outer periphery of the second dividing portion 7 (the outer periphery 51 of the joint region corresponding portion 5A), and becomes a position on the outer periphery of the first dividing portion 6 (the outer periphery 53 of the outer region corresponding portion 5C). FIG. 3 also serves as a top view of an embodiment of the cover 1 for explaining the modification 2 of the first embodiment described later.

(Variant 2) In the cover 1 of the first embodiment, as shown in FIG3 , the line segment passing through the specified area P of the outer area corresponding portion 5C can correspond to the reference line segment MP. This embodiment is referred to as variant 2 of the first embodiment. In the example of FIG3 , the outer area corresponding portion 5C and the joint area corresponding portion 5A can be specified so that the line segment connecting the position specified in the area P and the center position C is equivalent to the reference line segment MP.

(Variant 3) In the cover body 1 of the first embodiment, as shown in FIG6 , an extension portion 11 may be formed in the outer region corresponding portion 5C. This embodiment is referred to as variant 3 of the first embodiment. In the example of FIG6 , the extension portion 11 is formed so that the center position C exists between a predetermined position and a position N in the extension portion 11.

The extension portion 11 may be a portion formed integrally and continuously from the outer region corresponding portion 5C, or may be a portion formed by joining a member different from the outer region corresponding portion 5C.

[2 Second Embodiment] [2-1. Structure] As shown in A and B of FIG. 4 , the cover body 1 of the second embodiment has an insertion port 12 formed in the cover area corresponding portion 5B. FIG. 4 A and B are a top view and a cross-sectional view (a longitudinal cross-sectional view taken along line B-B in FIG. 4 A) showing an embodiment of the cover body of the second embodiment. In the cover body 1 of the second embodiment, the structure other than the structure of the insertion port 12 is the same as that of the first embodiment. In the description of the second embodiment, the description of the structure that overlaps with the first embodiment is omitted.

(Insert port) An insert port 12 for inserting a straw or the like from the outside is formed in the cover region corresponding portion 5B. In the example shown in A of FIG. 4 , the insert port 12 is formed by a through portion 13 .

(Penetration portion) The penetration portion 13 has a structure (penetration structure) that cuts from one surface of the cover body 1 into another surface in the vertical direction (thickness direction), and is a so-called cut-in portion. The shape of the penetration portion 13 is not particularly limited, and can be a cross shape as shown in A of FIG. 4, but these are only examples, and the example of A of FIG. 4 does not limit the shape of the penetration portion 13.

[2-2. Modifications] In the cover body 1 of the second embodiment, as shown in A and B of FIG. 5 , the insertion port 12 is not limited to being formed by the penetration portion 13, and the insertion port 12 may also be formed by the fragile portion 14. That is, in the cover body 1, a fragile portion 14 for guiding the disconnection position in the cover area corresponding portion 5B may be provided in the cover area corresponding portion 5B. The fragile portion 14 may be formed by a structure having a plurality of penetration portions 13 and at least one continuous portion 15 formed between at least two penetration portions 13 (a combined structure of the penetration portion 13 and the continuous portion 15). In the example of FIG. 5 , the fragile portion 14 has a plurality of penetration portions 13 formed radially around the continuous portion 15. A and B in FIG. 5 are a top view and a cross-sectional view (a longitudinal cross-sectional view along the CC line in A in FIG. 5 ) of an embodiment of a cover body showing a variation of the second embodiment.

The weakened portion 14 is not limited to the combination of the through portion 13 and the continuous portion 15, but may be a half-cut portion (not shown). The half-cut portion has a structure in which the cover region corresponding portion 5B is cut in the middle in the vertical direction, and is not limited to a structure in which the cover region corresponding portion 5B is cut in the middle in the vertical direction.

In the cover body 1 of the second embodiment and the cover body 1 of the variation of the second embodiment, the insertion opening 12 may be different from the cross shape. For example, the insertion opening 12 may be formed in a C shape. In this case, the weakened portion 14 may have a structure in which the penetration portion 13 and the continuous portion 15 are arranged along the C shape (not shown).

[3 The third embodiment] [3-1. Configuration] In the lid of the third embodiment, as shown in A and B of FIG. 7 , the lid region corresponding portion 5B has: a base 62 having a small opening 66, the small opening 66 having an opening area smaller than the opening 102 of the container 101; a small lid 63 that opens and closes the small opening 66; and a hinge 64 that connects the base 62 and the small lid 63, the small lid 63 being configured to be rotatable relative to the base 62 with the hinge 64 as an axis. The base 62 is configured by removing the small lid 63 from the lid 1. In the example of A in FIG. 7 , the base 62 is composed of a portion obtained by removing the small cover 63 from the cover area corresponding portion 5B and adding the portion of the outer area corresponding portion 5C. The small cover 63 may be a member different from the base 62 connected by a hinge 64, but as shown in the example of A in FIG. 7 , the small cover 63 and the base 62 may also be formed in a continuous and integrated manner. However, in the case of being formed in a continuous and integrated manner, the case includes a case where the small cover 63 and the base 62 are connected even slightly, and also includes a case where the hinge 64 is partially cut off. A and B in FIG. 7 are a top view and a cross-sectional view (a longitudinal cross-sectional view taken along line EE in A in FIG. 7 ) of an embodiment of the cover body of the third embodiment. In the cover body 1 of the third embodiment, the other structures except the base 62, the small cover 63 and the hinge 64 are the same as those of the first embodiment. In the description of the third embodiment, the structure parts that are repeated with the first embodiment are omitted.

A penetration portion 13 may be formed at a boundary position (boundary DL) between the outer periphery 163 of the small cover portion 63 and the opening edge 166 of the small opening portion 66. The penetration portion 13 may be a portion having the same structure as that described in the second embodiment. A fragile portion 14 may be formed at a boundary position (boundary DL) between the outer periphery 163 of the small cover portion 63 and the opening edge 166 of the small opening portion 66 instead of the penetration portion 13. The fragile portion 14 may be a portion having the same structure as that described in the modification of the second embodiment.

(Positional relationship between small cover and reference line segment) The small cover 63 is preferably formed so that its front edge 164 intersects with the reference line segment MP. In this case, the portion of the opening edge 166 of the small opening 66 that faces the front edge 164 is also formed so as to intersect with the reference line segment MP. In addition, it is preferably formed so that the top end 164A of the front edge 164 is formed on the reference line segment MP. In this case, the portion of the opening edge 166 of the small opening 66 that faces the top end 164A of the front edge 164 is also formed on the reference line segment MP.

[3-2. Function and Effect] The cover 1 of the third embodiment can obtain the same effect as the first embodiment.

When manufacturing a container with a lid, the center of the lid is generally aligned with the center of the container with the vertical direction as the line of sight, and the lid and the container are joined (sealed) by heat pressure or the like. If the size of the lid is roughly the same as the size of the edge of the opening of the container, the outer periphery of the lid will not protrude significantly outward from the edge of the container, and the user can firmly hold the edge of the container with a lid and carry the container with a lid. However, if the size of the lid is inconsistent with the size of the edge of the container and the size of the lid is too large, if the center of the lid is roughly aligned with the center of the container and the lid and the container are joined, the outer periphery of the lid will protrude significantly outward from the edge of the container, and there is a possibility that at least a part of the small opening that becomes the drinking port is located outside the edge of the opening. In this case, it is difficult to take the contents from the small opening. In addition, although the small opening can be located inside the edge of the opening by setting the position of the small opening to be close to the center of the cover area forming portion, in this case, the small opening is located much inside the cover area forming portion compared to the corresponding portion of the outer area, and it is still difficult to use the small opening as a drinking port to take in contents.

In view of this, in the cover body 1 of the third embodiment, when the portion of the opening edge 166 of the small opening portion 66 that is opposite to the front edge 164 intersects with the reference line segment MP, even if the size of the cover body 1 is significantly different from the size of the edge 103 of the container 101, the small opening portion 66 can be located on the inner side of the edge of the container near the position of the small opening portion 66 and the distance between the outer periphery of the cover body 1 at a position close to the small opening portion 66 and the edge 103 of the container 101 can be roughly uniform. Therefore, even if the size of the lid 1 is significantly different from the size of the edge 103 of the container 101, the small opening 66 can function as a drinking port and the convenience of taking the contents of the container 101 can be roughly achieved.

[3-3. Modifications] (Modification 1) In the lid body 1 of the third embodiment, as shown in A and B of FIG8 , a gripping portion 71 may be provided on the upper surface side (exposed surface 16 side) of the small lid portion 63. This embodiment is referred to as Modification 1 of the third embodiment. FIG8 A and B are a top view and a cross-sectional view (a longitudinal cross-sectional view taken along the F-F line in FIG8 A ) of an embodiment of the lid body 1 of the third embodiment. In the examples of FIG8 A and B , when the small opening 66 is closed by the small lid portion 63, a gripping portion 71 is provided on the exposed surface side (exposed surface 16 of the lid body 1) of the small lid portion 63, i.e., on the upper surface side. The structure of the gripping portion 71 is not particularly limited, but it is preferred that the small cover portion 63 can be rotated around the hinge portion 64. In the examples A and B of FIG8 , a pull-tab component 73 is provided as the gripping portion 71.

(Pull-tab component) Preferably, when the small opening portion 66 is closed by the small cover portion 63, the pull-tab component 73 has one end 77A of the pull-tab component 73 joined to the small cover portion 63, so that the other end 77B of the pull-tab component 73 becomes a free end. In the case where the other end 77B is a free end, the other end 77B is fixed to the small cover portion 63 in a removable manner by an easily releasable adhesive. The portion of the pull-tab component 73 joined to the small cover portion 63 is called a pull-tab joint portion 78. The shape and structure of the portion of the pull-tab component 73 on the free end side (the portion on the other end 77B side) other than the pull-tab joint portion 78 is not particularly limited as long as it is formed to a size and shape that allows the pull-tab component 73 to be pinched by hand. The material of the pull-tab member 73 can be the same as the material of the cover body 1 described in the first embodiment, or can be made of a paper material.

In the cover body 1, the installation position and installation direction of the pull-tab component 73 in the small cover portion 63 are not particularly limited, but in the example of A in Figure 8, the pull-tab component 73 is engaged with the small cover portion 63 at a position close to the top of the small cover portion 63 (i.e., near the front edge 164).

The method for joining the pull-tab member 73 to the small cover portion 63 (i.e., the method for forming the pull-tab joint 78) can include various methods such as ultrasonic bonding, heat sealing, and bonding based on adhesives. Among the above methods, ultrasonic bonding is preferred from the viewpoints of the ease of bonding and the strength of bonding. The formation position of the pull-tab joint 78 in the small cover portion 63 is preferably a position offset from the center of the small cover portion 63 from the viewpoint of making it easy to stand up the small cover portion 63 (rotate the small cover portion 63) by picking up the pull-tab member 73.

(Variant 2) In the cover body 1 of the second embodiment, as shown in the examples of A and B in FIG. 9 , a retaining structure forming portion 72 may be provided, which is a portion of a retaining structure for retaining the small cover part 63 when the small cover part 63 is rotated relative to the base part 62 with the hinge part 64 as an axis so that the small opening part 66 is opened. The cover body 1 having such a structure is referred to as variant 1 of the second embodiment. FIG. 9 A and B are a top view and a cross-sectional view (G-G line longitudinal cross-sectional view) schematically showing an embodiment of the cover body 1 of variant 2 of the second embodiment.

(Retention structure forming part) The structure of the retention structure forming part 72 is not particularly limited. For example, in the example of the cover body 1 shown in A of FIG9 , the claw part 75 and the support part 76 form the retention structure forming part 72.

(Claw) The claw 75 can be any part as long as it has a structure that can be locked with respect to the support part 76 described later by locking or insertion. In the example of A in FIG9 , the claw 75 is provided on the pull-tab member 73 as an example of the gripping portion 71. In addition, in this example, the claw 75 is formed by a cut-in portion formed in a contour shape such as a substantially mountain shape at a predetermined position of the pull-tab member 73. In addition, the claw 75 in FIG9 is an example, and the structure of the claw 75 is not limited to this. The concept of the claw 75 may also include a structure having a shape different from the example of FIG9 and such a shape that can be locked or inserted with the support part 76.

(Supporting portion) The supporting portion 76 is formed into a shape that can be locked or inserted into the claw portion 75. In the example of A in FIG. 9 , the supporting portion 76 is a penetration portion 13 formed at a predetermined position of the base portion 62. The penetration portion 13 may have a structure similar to that described in the second embodiment. The supporting portion 76 is formed at a position that can be opposite to the claw portion 75 when the pull-tab member 73 is displaced so that the small cover portion 63 rotates approximately around the hinge portion 64 or its vicinity.

(Formation of holding structure) In the example of A in FIG. 9 , when the small cover portion 63 is erected in the cover body 1, the grip portion 71 is pulled up. At this time, the pull-tab member 73 is pulled up, and a predetermined portion of the free end side (the other end 77B side) of the pull-tab member 73 is bent or twisted, thereby forming a shape in which the claw portion 75 protrudes downward or upward. Furthermore, the pull-tab member 73 is displaced to rotate the small cover portion 63 until the claw portion 75 of the small cover portion 63 reaches a position opposite to the support portion 76 or a position near the position. Furthermore, the claw portion 75 of the pull-tab member 73 is locked or inserted into the support portion 76. Thus, a holding structure is formed that holds the small cover portion 63 while the small opening portion 66 is exposed.

In the above description, a case is described in which the holding structure forming portion 72 is formed with the penetration portion 13 as the support portion 76 , but the structure corresponding to the support portion 76 is not limited to the penetration portion 13 .

(Variant 3) In the cover of the third embodiment, an extension portion 11 may also be formed in the outer region corresponding portion 5C. This embodiment is referred to as variant 3 of the third embodiment. In the example of A and B in FIG. 10 , the extension portion 11 is formed in such a way that the center position C exists between the predetermined position and the position N in the extension portion 11. The extension portion 11 may be configured as described in the first embodiment. FIG. 10 A and B are a top view and a cross-sectional view (H-H line longitudinal cross-sectional view) schematically showing an embodiment of the cover of variant 3 of the third embodiment.

[4 Fourth embodiment] [4-1. Structure] In the cover body 1 of the third embodiment, as shown in A and B of FIG. 11, the cover area corresponding portion 5B may have an obstruction portion 20 formed on the inner side relative to the outer periphery of the cover area corresponding portion 5B (the inner periphery 52 of the joint area corresponding portion 5A), and at least a portion of the inner side relative to the inner edge 20A of the obstruction portion 20 may have a height difference portion 21 and a penetration portion 13 formed therein. FIG. 11A and B are a top view and a cross-sectional view (a longitudinal cross-sectional view taken along line II) schematically showing an example of the cover body 1 of the fourth embodiment.

(Obstruction portion) The obstruction portion 20 is a portion that prevents the liquid that becomes the content from flying out from the penetration portion 13 of the lid when the container 101 is shaken vigorously when the liquid is injected into the container 150 with the lid body as the content. The obstruction portion 20 is formed as a portion extending inwardly (toward the center position C of the lid area corresponding portion 5B when viewed from above) from at least a portion of the outer periphery of the lid area corresponding portion 5B. In the example of A in FIG. 11 , the obstruction portion 20 is formed as a portion extending inwardly (toward the center position C) from the entire outer periphery of the outer periphery of the lid area corresponding portion 5B when the lid body 1 is viewed from above.

(Shape of the obstruction portion) Regarding the shape of the obstruction portion 20, the obstruction portion 20 is preferably formed so that its width WL becomes the maximum at the position of the reference line segment MP. The width WL is defined as described above as follows. That is, assuming a line segment connecting the selected position LU on the outer periphery of the obstruction portion 20 and the center position C of the cover area forming portion, the length of the portion where the line segment intersects the obstruction portion 20 is defined as the width WL of the obstruction portion.

Preferably, the obstruction portion 20 is formed such that the width WL of the obstruction portion 20 becomes smaller as the distance from the reference position along the outer periphery of the obstruction portion 20 increases, based on the intersection position between the reference line segment MP and the outer periphery of the obstruction portion 20 .

(Step portion) The step portion 21 is formed on the inner side relative to the inner end of the obstruction portion 20 in the cover area corresponding portion 5B, and forms a portion with different positions in the vertical direction. In the example of A in FIG11 , the step portion 21 is a structural portion having a groove portion 22. In the cover body 1 of A in FIG11 , it corresponds to the side wall (outer wall 22A) of the groove portion 22 connected to the obstruction portion 20. The groove portion 22 is an example, and the step portion 21 may also be a step portion.

(Groove portion) The groove portion 22 has an inner wall 22B and an outer wall 22A, and has a bottom 22C connecting the inner wall 22B and the outer wall 22A. In the example of A in FIG11 , the upper end of the side wall (inner wall 22B) located on the inner side (close to the center of the corresponding portion of the cover area) of the side wall forming the groove portion 22 is connected to the outer periphery of the plane portion 23. The height difference portion 21 has a structure that forms a position difference in the height direction between the bottom 22C of the groove portion 22 and the obstruction portion 20. In the example of A in FIG11 , the height difference portion 21 also forms a position difference in the height direction between the bottom 22C of the groove portion 22 and the upper end of the inner wall 22B. With such a structure, a height difference is also formed between the plane portion 23 and the obstruction portion 20. In the groove portion 22, the heights of the outer wall 22A and the inner wall 22B (the size of the height difference from the lower end to the upper end) are different, and the height of the inner wall 22B is greater than the height of the outer wall 22A, but this is only an example.

The groove portion 22 is formed in a ring shape over the entire outer circumference of the inner edge of the obstruction portion 20. The cross-sectional shape of the groove portion 22 is not particularly limited, and may be a V-shaped cross section, a U-shaped cross section, or the like.

(Plane portion) In the lid body 1, in the example of A in FIG. 11 , a plane portion 23 is formed on the inner side of the height difference portion 21 in the lid area corresponding portion 5B. However, this is only an example. In addition, in the example of A in FIG. 11 , the positions of the plane portion 23 and the obstruction portion 20 in the height direction are different from each other, and the position of the plane portion 23 is arranged at a position higher than the position of the obstruction portion 20. In this case, on the surface of the lid body 1 that is opposite to the exposed surface 16 (the surface opposite to the container 101), it is easy to form a deep concave structure by the plane portion 23 and the inner wall 22B, which can increase the space between the container 101 and the lid body 1, and can more effectively suppress the hidden danger of the contents overflowing from the inside of the container 101 to the outside.

In the example of A in FIG. 11 , the entire outer periphery of the planar portion 23 is connected to the groove portion 22 (inner wall 22B), and the step portion 21 is formed so as to surround the planar portion 23 when the lid body 1 is viewed from above.

In the cover body 1, the plane part 23 may be changed to form an inclined surface (not shown) on the inner side of the height difference part 21 in the cover area corresponding part 5B. In addition, the plane part 23 may be changed to form a curved surface (not shown) on the inner side of the height difference part 21 in the cover area corresponding part 5B.

(Penetration portion) In the cover region corresponding portion 5B, a penetration portion 13 is formed inside and/or inside the step portion 21. In the example of A in FIG. 11 , the penetration portion 13 is formed on a flat portion 23 formed inside the step portion 21. However, this is only an example, and the position of the penetration portion 13 is not limited to this.

As described in the second embodiment, the penetration portion 13 has a structure (a penetration structure) that cuts into the other surface of the cover body 1 in the vertical direction (thickness direction), and is a so-called cut-in portion. The shape of the penetration portion 13 is not particularly limited, and can be a cross shape as shown in A of FIG. 11, but these are only examples and do not limit the shape of the penetration portion 13. The penetration portion 13 shown in the example of A of FIG. 11 is a structural portion that becomes the insertion port 12.

[4-2. Manufacturing method] As a manufacturing method for the cover body 1, for example, a blank obtained by punching a sheet (raw material sheet) formed of a material corresponding to the material of the cover body 1 according to the shape of the cover body 1 can be subjected to a shaping process, and the cover body 1 can be manufactured through this process. The raw material sheet is preferably composed of a fiber sheet containing a paper material. In this case, when the above-mentioned manufacturing method for the cover body 1 is applied, the paper material constituting the cover body 1 is partially extended. In particular, in the cover body 1, a low-density portion in which the density of the fiber constituting the paper material is lower than that of the obstruction portion 20 is formed in the portion extending from the boundary between the obstruction portion 20 and the height difference portion 21 toward the height difference portion 21. In addition, by forming such a low-density portion, it is believed that the cushioning property of the low-density portion can be used to impart cushioning property to the entire lid body 1. Even if a force such as vibration in the up-down direction is applied to the container 101, the content portion jumps upward and contacts the obstruction portion 20, and the collision force of the content on the obstruction portion 20 can be mitigated (cushioned).

[4-3. Function and Effect] The cover 1 of the fourth embodiment can obtain the same effect as the first embodiment. In addition, in the cover 1 of the fourth embodiment, since the obstruction part 20 and the step part 21 are formed, when liquid is contained in the container 101 as the content, even if the penetration part 13 is formed on the flat part 23 of the cover 1, the obstruction part 20 and the step part 21 can suppress the leakage of the liquid from the penetration part 13.

[4-4. Modifications] (Modification 1) In the lid body 1 of the fourth embodiment, as in the third embodiment, as shown in A and B of FIG. 12 , the lid region corresponding portion 5B may include: a base 62 having a small opening 66, the small opening 66 having an opening area smaller than the opening 102 of the container 101; a small lid 63 that opens and closes the small opening 66; and a hinge 64 that connects the base 62 and the small lid 63, the small lid 63 being configured to be rotatable relative to the base 62 with the hinge 64 as an axis. This embodiment is referred to as Modification 1 of the fourth embodiment. A and B in FIG. 12 are a top view and a cross-sectional view (J-J line longitudinal cross-sectional view) schematically showing an embodiment of the cover body 1 of the fourth embodiment.

The small cover portion 63, the small opening portion 66, and the hinge portion 64 are preferably formed at a position avoiding the groove portion 22, and are preferably formed at the obstruction portion 20. By forming them at the obstruction portion 20, the small opening portion 66 can be easily used as a drinking port.

Although the through portion 13 can be formed at the position of the boundary DL between the outer periphery 163 of the small cover portion 63 and the opening edge 166 of the small opening portion 66, it is preferred to form a half-cut portion at the position of the boundary DL from the perspective of making the liquid leakage suppression achieved based on the blocking portion 20 more effective.

(Positional relationship between small cover and reference line segment) The small cover 63 is preferably formed in a manner such that the front edge 164 intersects the reference line segment MP, similarly to the third embodiment described above. In this case, the portion of the opening edge 166 of the small opening 66 that faces the front edge 164 is also formed in a manner such that it intersects the reference line segment MP. In addition, it is preferred that the top 164A of the front edge 164 is formed on the reference line segment MP. In this case, the portion of the opening edge 166 of the small opening 66 that faces the top 164A of the front edge 164 is also formed on the reference line segment MP.

When the portion of the opening edge 166 of the small opening 66 that faces the front edge 164 is formed to intersect the reference line segment MP, similarly to the third embodiment, even if the size of the lid 1 is greatly different from the size of the edge 103 of the container 101, the small opening 66 can be located inside the edge of the container near the position of the small opening 66 and the distance between the outer periphery of the lid 1 at a position close to the small opening 66 and the edge 103 of the container 101 can be made substantially uniform. Therefore, even if the size of the lid 1 is greatly different from the size of the edge 103 of the container 101, the small opening 66 can function as a drinking port and the convenience of taking the contents of the container 101 can be substantially achieved.

(Variant 2) In the example of the cover body 1 of the fourth embodiment, at least a portion of the groove portion 22 in the height difference portion 21 may have a concave-convex shape (a concave-convex shape in the inner and outer directions). This embodiment is referred to as variant 2 of the fourth embodiment. For example, the inner wall 22B in the groove portion 22 may have a structure that is molded into a concave-convex shape such as a wave shape. At least a portion of the groove portion 22 in the height difference portion 21 has a concave-convex shape (a concave-convex shape in the inner and outer directions), and thus when the blank is molded during the manufacture of the cover body 1, the paper material stretches, and the size of the paper material changes accordingly, thereby worrying about the generation of wrinkles on the blank. This variant can suppress this hidden danger.

[5 Fifth Embodiment] [5-1. Structure] In the cover body 1 of the fifth embodiment, as shown in A and B of FIG. 13, a combination structure of a label portion 30 and a display portion 31 is formed in the outer area corresponding portion 5C. The combination structure serves as a content identification portion 32. FIG. 13A and B are a top view and a cross-sectional view (a longitudinal cross-sectional view taken along line K-K in FIG. 13A) of an embodiment of the cover body of the fifth embodiment. In the cover body 1 of the second embodiment, the other structures except the combination structure of the label portion 30 and the display portion 31 are the same as those of the third embodiment. In the description of the fifth embodiment, the description of the structure that is repeated in the third embodiment is omitted.

(Label portion) The cover 1 has a plurality of label portions 30 at the outer periphery 53 of the outer region corresponding portion 5C. The label portion 30 can be formed by the extension portion 11. The label portion 30 is formed so as to be able to bend individually with the base end 30A as the axis. The base end 30A of the label portion 30 is a portion defined by a straight line connecting two positions (protrusion start positions NB1, NB2) protruding roughly along the outer periphery 30B of the label portion 30. The size and shape of the label portion 30 are not particularly limited as long as it has a shape that protrudes to the extent that the user can bend the label portion 30 by hand, etc. When three or more label portions 30 are formed, the label portions 30 can be formed so that the separation intervals are equal.

(Display portion) With respect to at least a portion of the label portion 30, it is preferred that the display portion 31 is provided at a position offset from the label portion 30 toward the inner side of the cover region corresponding portion 5B. In addition, in the case where the display portion 31 is provided at a position offset from the label portion 30 toward the inner side of the cover region corresponding portion 5B, the case where the display portion 31 is formed by two parts, namely, a part straddling the label portion 30 and a part offset from the label portion 30 toward the inner side of the cover region corresponding portion 5B.

The display portion 31 may be any one of text, graphics, shapes, colors, symbols, etc., or a combination of these. In addition, the display portions may be connected to each other. In the example of A in FIG13 , the display portion 31 is composed of text. Each display portion 31 may be a portion forming text such as COLA, TEA, JUICE, OTHER, etc. In addition, the display portion 31 may be a printing portion, or a portion formed into a concave and convex shape by embossing, etc. In the example of A in FIG13 , the display portion 31 is a printing portion. In this example, the printing portion is a portion on which text is printed.

(Combination of label section and display section) The combination of label section 30 and display section 31 constitutes content identification section 32.

(Relationship between label portion and reference line segment) The label portion 30 is preferably formed at a position away from the position N corresponding to the position of the reference line segment MP in the outer periphery 53 of the outer region corresponding portion 5C. For example, assuming that the formation position of the label portion 30 is the position (selected position SN) of the outer periphery 53 of the outer region corresponding portion 5C, and in the case where the selected position SN is selected so that the center position C exists on the straight line NK connecting the selected position SN and the position N, it is preferably a position within a range such that the azimuth angle α becomes less than 30 degrees (degrees) from the selected position SN along the outer periphery 53 of the outer region corresponding portion 5C. The azimuth angle α represents the deviation angle relative to the direction of the reference direction, with the direction of the line segment connecting the selected position SN and the center position C as the reference direction. The line segments Mα1 and Mα2 in Figure 13 represent line segments with an azimuth angle α of 30 degrees.

[5-2. Function and Effect] The cover of the fifth embodiment can obtain the same effect as the first embodiment. In addition, in the cover of the fifth embodiment, a combination of a label portion 30 and a display portion 31 is formed, and the label portion 30 and the display portion 31 are formed at staggered positions, so that when the label is bent to identify the content, the display portion 31 can be suppressed from being blocked, and the combination of the label portion 30 and the display portion 31 can effectively function as a content identification portion 32.

[6 Sixth embodiment] In the cover body 1 of the sixth embodiment, a window portion 41 is formed as shown in A and B of FIG. 15. A and B of FIG. 15 are respectively a top view and a cross-sectional view for illustrating an embodiment of the cover body of the sixth embodiment. In addition, B of FIG. 15 is a cross-sectional view schematically showing the state of the longitudinal section along the M-M line in A of FIG. 15. In the cover body 1 of the sixth embodiment, the other structures except the structure of the window portion 41 are the same as those of the first to fifth embodiments. In the description of the sixth embodiment, the description of the structure that is repeated in the first to fifth embodiments is omitted.

(Window portion) The window portion 41 is a portion configured to allow visible light to pass through the main body 1A of the cover body 1 in the thickness direction (Z-axis direction in B of FIG. 15 ), and has an opening hole 42 formed on a portion of the cover body 1 and a light-transmissive cover sheet 43, and has a structure in which the opening hole 42 is covered by the cover sheet 43. The cover sheet 43 is bonded around the opening hole 42, and the cover sheet 43 and the opening hole 42 may be directly fused or bonded via an adhesive. The cover sheet 43 can be formed by pasting a colored or non-colored transparent or translucent resin film, cerophane paper, oil-resistant paper, etc., or using a transparent paper made of cellulose nanofibers (cellulose microfibers) as a transparent paper material. By providing the window portion 41 pasted with a transparent or translucent material, the contents of the container 101 can be confirmed while the lid body 1 and the container 101 are kept in a state of being joined (closed state). From the viewpoint of more reliably confirming the contents of the container 101, the opening hole 42 of the window portion 41 is preferably formed on the inner side of the lid region corresponding portion 5B. In addition, from the perspective of the influence on the adhesion between the lid body 1 and the container 101, it is preferable that the adhesion area around the cover sheet 43 and the opening hole 42 is also formed on the inner side of the lid area corresponding portion 5B.

In addition, the shape of the window portion 41 is not limited to the shape shown in the figure, and can be formed in any size and shape.

[7 Seventh embodiment] In the cover body 1 of the seventh embodiment, as shown in A and B of FIG. 16, a penetration portion 45 and a breathable sheet 46 are provided. FIG. 16A and FIG. 16B are respectively a top view and a cross-sectional view for illustrating an embodiment of the cover body 1 of the seventh embodiment. In addition, FIG. 16B is a cross-sectional view schematically showing the state of the longitudinal section along the N-N line in FIG. 16A. In the cover body 1 of the seventh embodiment, except for the structure of the penetration portion 45 and the breathable sheet 46, the other structures are the same as those of the first to sixth embodiments. In the description of the seventh embodiment, the description of the structure that is repeated in the first to sixth embodiments is omitted.

(Penetration portion) The penetration portion 45 can be formed in the same manner as the penetration portion 13 described in the second embodiment. The penetration portion 45 has a structure (penetration structure) that cuts from one surface of the cover body 1 into another surface in the up-down direction (thickness direction), and is a so-called cut-in portion. The shape of the penetration portion 45 is not particularly limited, and can be a cross shape as shown in A of FIG. 16, but these are only examples, and the example of A of FIG. 16 does not limit the shape of the penetration portion 45. In the example shown in A of FIG. 16, the insertion port 12 is formed by the penetration portion 45. In addition, in this example, the penetration portion 45 is formed in the cover area corresponding portion 5B, and an insertion port 48 for inserting a straw or the like from the outside is formed in the cover area corresponding portion 5B. The insertion port 48 is the same as the insertion port 12 described in the second embodiment, so a detailed description is omitted.

The cover 1 has a structure in which a breathable sheet 46 is provided on the main body 1A. The main body 1A referred to here forms a cover area corresponding portion 5B and an outer area corresponding portion 5C, which corresponds to the sheet-like component forming the cover 1 in the description of the first embodiment. In addition, the definition of the main body 1A is the same in the above-mentioned first to sixth embodiments.

(Breathable sheet) In the lid body 1, at least one (one) breathable sheet 46 is provided. In addition, at least one breathable sheet 46 is arranged in such a manner that at least a portion of the breathable sheet 46 faces at least a portion of the surface of the lid region corresponding portion 5B that faces the container. In the example of A in FIG. 16 , the breathable sheet 46 is provided in the lid region corresponding portion 5B of the lid body 1. The breathable sheet 46 is arranged at least on the side of the surface 73 facing the container 101 in the surface of the lid region corresponding portion 5B of the main body 1A.

(Breathability) The breathable sheet 46 preferably has a degree of breathability that allows carbonic acid gas and steam (water vapor, etc.) to pass from the surface of the breathable sheet 46 facing one surface (opposite surface 73 of lid 1) to the surface facing the other surface (exposed surface 72 of lid 1) (surface facing main body 1A). Carbonic acid gas and steam (water vapor, etc.) are sometimes collectively referred to as "gas, etc."

(Area for installing the breathable sheet) Regarding the area for installing the breathable sheet 46 relative to the main body 1A, at least a portion of at least one surface of the breathable sheet 46 faces at least a portion of the surface of the lid area corresponding portion 5B that faces the container 101 (the surface facing the same direction as the facing surface 73 of the lid body 1).

In the example of A in FIG. 16 , the breathable sheet 46 is arranged so as to cover substantially the entire surface of the cover area corresponding portion 5B of the main body 1A. In addition, the breathable sheet 46 may be arranged so as to also cover the area outside the cover area corresponding portion 5B of the main body 1A. For example, the breathable sheet 46 may be arranged so as to cover not only the cover area corresponding portion 5B but also at least a portion of the joint area corresponding portion 5A. However, from the viewpoint of being able to suppress the influence of the bonding force between the breathable sheet 46 and the container and improving the close contact between the container and the cover body, the breathable sheet 46 is preferably arranged so as to avoid at least a portion of the joint area corresponding portion 5A and is preferably arranged on the inner side relative to the cover area corresponding portion 5B. When the breathable sheet 46 is arranged to avoid at least a portion of the joining area corresponding portion 5A, the breathable sheet 46 is arranged on the inner side compared to the outer periphery of the joining area corresponding portion 5A, but it is better from the viewpoint of suppressing the influence of the joining force between the breathable sheet 46 and the container within the entire outer periphery of the joining area corresponding portion 5A and simultaneously achieving the joining of the container and the lid body.

(Other examples of the area where the breathable sheet is set) In addition, when the breathable sheet 46 is set in a manner that also covers the area outside the cover area corresponding to the portion 5B of the main body 1A, as shown in A and B of Figure 17, the breathable sheet 46 is preferably configured in a manner that covers a portion of the area on the side of the second part 9. In this case, the portion of the second part 9 covered by the breathable sheet 46 becomes an area with stronger toughness than other parts, and the user holds the area around the portion of the second part 9 covered by the breathable sheet 46, thereby easily generating folds along the area with strong toughness, and the user can suppress the potential risk that the user holds the container 150 with the attached cover at the second part 9, generates folds at an unintended position, and causes the user to drop the container 150 with the attached cover. In addition, by making it easy to form a fold at a specific portion of the second portion 9 of the cover 1, the user holds the container 150 with the cover at the folded portion, thereby making it difficult for the edge 103 of the container 101 to be touched by the user's hand. Even if the temperature of the edge 103 of the container 101 rises, it is possible to suppress the worry that the heat of the edge 103 will become an obstacle when carrying the container 150 with the cover. In addition, from the viewpoint of improving this effect, it is preferred that the portion of the air-permeable sheet 46 facing the second portion 9 is fully joined to the main body 1A by bonding or fusion, etc., so that the toughness of the second portion 9 can be improved. In addition, A and B of FIG. 17 are a plan view and a cross-sectional view, respectively, for explaining an example of the cover 1 of the seventh embodiment. In addition, FIG. 17B is a cross-sectional view schematically showing the state of the longitudinal section along the line O-O in FIG. 17A. In FIG. 17A and FIG. 17B, the description of the slit portion 47 is omitted for the sake of convenience.

(Joint portion between the breathable sheet and the corresponding portion of the cover area) The joint portion formed by joining the breathable sheet 46 and the corresponding portion of the cover area 5B is formed along the outer periphery of the breathable sheet 46 in the example of A in FIG. 16 . On the inner side of the joint portion, the breathable sheet 46 and the corresponding portion of the cover area 5B are in a non-joined state. However, this is only an example, and the joint portion may also be formed in the inner area of the breathable sheet 46. In addition, the formation area of the joint portion formed by joining the breathable sheet 46 and the corresponding portion of the cover area 5B is preferably a part of the breathable sheet 46. In this case, a gap can be generated between the breathable sheet 46 and the main body 1A, thereby easily buffering the momentum of the liquid that collides with the breathable sheet 46. In addition, the liquid that enters the breathable sheet 46 can easily pass through the gap between the breathable sheet 46 and the main body 1A and be buffered, which can effectively prevent the liquid from flying out of the penetration portion 45.

In addition, in the example of A in FIG. 16 , the joint formed by joining the air-permeable sheet 46 and the cover region corresponding portion 5B is formed in a ring shape along the outer periphery of the air-permeable sheet 46, but it may be formed locally or formed at a plurality of positions along the outer periphery of the air-permeable sheet 46. The joint may be a portion where the air-permeable sheet 46 and the cover region corresponding portion 5B are joined by an adhesive or the like, or a portion where the air-permeable sheet 46 and the cover region corresponding portion 5B are joined by ultrasound (ultrasonic joint). As a method of joining by ultrasound, ultrasonic welding method or the like can be cited. In addition, the joint is effectively a portion where the air-permeable sheet 46 and the main body 1A are firmly joined in order to prevent the air-permeable sheet 46 from coming off due to the impact of contact with liquid or the like as much as possible.

(Material of the breathable sheet) The breathable sheet 46 is a sheet material having a plurality of fibers. The breathable sheet 46 preferably has a fiber sheet.

(Fiber sheet) As the fiber sheet, a woven fabric sheet and a nonwoven fabric sheet can be cited. From the viewpoint of improving the effect of suppressing the leakage of liquid from the penetration portion 45, a nonwoven fabric sheet is preferred. In the examples of A and B in FIG. 16 , a nonwoven fabric sheet is used as the fiber sheet that becomes the breathable sheet 46.

(Nonwoven fabric sheet) As a nonwoven fabric, it is defined as "a product in which fibers are oriented in one direction or randomly, and the fibers are connected by crossing and/or fusion and/or bonding. However, paper, woven fabric, knitted fabric, tufted fabric and shrink felt are excluded." Nonwoven fabric sheets can include, for example, spunbond nonwoven fabric, chemically bonded nonwoven fabric, airlaid nonwoven fabric, needle-punched nonwoven fabric, spunlace nonwoven fabric, heat-sealed nonwoven fabric, pulp airlaid nonwoven fabric, nanofiber nonwoven fabric, etc., and melt-blown nonwoven fabric can also be cited. As the nonwoven fabric sheet, it is preferred to use a material with pulp fibers as the main fiber component, but it is not limited thereto, and a material composed of fibers mainly composed of non-pulp fibers such as synthetic fibers may also be used. The nonwoven fabric sheet with pulp fibers as the main fiber component means that the amount of pulp fibers contained is 50% by mass or more, preferably 70% by mass or more, and more preferably 80% by mass or more. Examples of non-pulp fibers include natural fibers such as wool, silk, and cotton, polyester fibers such as nylon, vinyl, and polyethylene terephthalate, synthetic fibers such as polypropylene, polyolefins such as polyethylene and polypropylene, and polyurethane, regenerated fibers such as rayon, and semi-synthetic fibers such as acetate. However, it is preferred to use synthetic fibers.

The nonwoven sheet can be obtained by overlapping nonwoven sheets of the same or different types, or by overlapping raw materials composed of different materials.

(Fiber) The fiber constituting the fiber sheet is preferably pulp fiber, but this does not mean that the fiber is limited to pulp fiber. The fiber may be non-pulp fiber. As non-pulp fiber, natural fiber materials other than pulp fiber, synthetic fiber, metal fiber, wood formed in a fiber shape, glass fiber, etc. can be cited.

(Slit portion) In the lid body 1, a slit portion 47 is provided in a manner overlapping at least a portion of the position corresponding to the penetration portion 45. The slit portion 47 is a portion that is cut into the air-permeable sheet 46 in a manner that penetrates along the thickness direction thereof. By providing the air-permeable sheet 46 with the slit portion 47, even when the penetration portion 45 forms an insertion port 48, a component such as a straw can be reliably inserted from the insertion port 48 toward the space 105 in the container 101.

The slit portion 47 is formed in a cross shape. However, this is only an example, and the shape of the slit portion 47 is not particularly limited, and may also be a curved shape. In addition, the extending direction of the cut forming the slit portion 47 is preferably not consistent with the extending direction of the cut forming the penetration portion 45. In addition, the slit portion 47 may also be omitted. In this case, it is preferred that the thickness of the portion corresponding to the slit portion 47 or the portion near it is thinner than the thickness of other portions, and the portion corresponding to the slit portion 47 or the portion near it is set to a fragile structure (a structure that is easily broken).

[8 8th Implementation] As shown in A and B of FIG. 18, the cover 1 of the 8th implementation is changed from the breathable sheet in the cover of the 7th implementation to a gas-liquid separation material 49. FIG. 18A and FIG. 18B are respectively a top view and a cross-sectional view for illustrating an implementation example of the cover 1 of the 8th implementation. In addition, FIG. 18B is a cross-sectional view schematically showing the state of the longitudinal section along the PP line in FIG. 18A. In the cover 1 of the 8th implementation, the other structures except the structure in which the gas-liquid separation material 49 is configured are the same as those of the 7th implementation. In the description of the 8th implementation, the description of the parts other than the gas-liquid separation material is omitted.

The gas-liquid separation material 49 is a sheet material capable of separating the gas phase gas and at least a part of the liquid phase liquid from a mixed fluid having a gas phase and a liquid phase. As the sheet material constituting the gas-liquid separation material, a paper ventilation sheet 50 is preferably used.

The paper ventilation sheet 50 is a sheet (fiber sheet) containing fibers and having air permeability. The fibers of the paper ventilation sheet include long fibers. The paper ventilation sheet has long fibers as the main component, but it is preferred from the viewpoint of strength. As the long fibers, it is preferred to use paper fibers. The main component means that 50% by mass or more of the fibers constituting the paper ventilation sheet are long fibers.

The fiber forming the paper ventilation sheet 50 is preferably so-called paper fiber (pulp fiber). Therefore, the gas-liquid separation material 49 is preferably a component that can be called gas-liquid separation paper. Pulp fibers can include fibers of wood pulp, fibers of non-wood pulp, and the like. With respect to either wood pulp or non-wood pulp, virgin pulp is preferred from the viewpoint of maintaining the fiber length in a relatively long state. In addition, with respect to pulp fibers, base paper having excellent wet strength can also be obtained from wood pulp, so unbleached sulfate pulp (UKP), bleached sulfate pulp (BKP) or a combination thereof is preferred. Unbleached pulp refers to wood pulp that has not been bleached. Bleached pulp refers to wood pulp that has been bleached. Examples of bleaching methods for bleached pulp include bleaching methods using alkali, chlorine, sodium hypochlorite, etc., bleaching methods using chlorine dioxide, etc. (ECF (Elementary Chlorine Free) bleaching method), and bleaching methods using oxygen, hydrogen peroxide, ozone, etc. (TCF (Total Chlorine Free) bleaching method). Examples of non-wood pulp include short-staple pulp, kenaf pulp, bagasse pulp, bamboo pulp, hemp pulp, etc.

In addition, long fibers refer to fibers having a fiber length (usually about 1 mm or more) of relatively short broadleaf pulp (L material) among pulp fibers generally used to form foreign paper. From the viewpoint of obtaining a paper ventilation sheet having excellent wet strength among such pulp fibers, long fibers are preferably wood pulp fibers obtained from coniferous pulp (N material). However, the fibers contained in the paper ventilation sheet 50 only need to be fibers of a material having the above-mentioned fiber length on average, and the situation of including fibers having a fiber length less than that of broadleaf pulp (L material) is not completely excluded. That is, short fibers having a fiber length shorter than long fibers may be mixed in the paper ventilation sheet. Specifically, for example, the paper ventilation sheet 50 preferably contains fibers of softwood pulp, but may also contain fibers of broadleaf pulp.

The paper ventilation sheet 50 is preferably a non-woven fabric sheet. The definition of the non-woven fabric sheet is the same as that in the seventh embodiment, but the non-woven fabric sheet constituting the paper ventilation sheet can preferably be a sheet obtained by squeezing the fibers (pulp fibers, etc.) as described above using water, etc. The paper ventilation sheet can reduce the manufacturing cost by using such a sheet, and it is easy to ensure a gap between adjacent fibers.

(Repellent) The gas-liquid separation material 49 has a structure in which a repellent capable of imparting repellency to the paper ventilation sheet 50 is arranged on at least one side of the paper ventilation sheet 50. The structure in which the repellent is arranged relative to the paper ventilation sheet 50 means that the repellent is in contact with the fibers forming the paper ventilation sheet 50.

(Type of repellent) The repellent is preferably determined according to the type of liquid contained in the container 101 in the state of the container 150 with the cap attached. When the liquid in the content includes water, a water repellent is preferably used as the repellent. The water repellent is not particularly limited, but fluorine-based water repellents, silicone-based water repellents, waxes, etc. can be used.

(Method of attaching water-repellent as liquid repellent) The method of attaching water-repellent can represent a method of performing water-repellent treatment on the paper ventilation sheet 50. The method of water-repellent treatment is not particularly limited, and for example, the following method can be cited: immersing the paper ventilation sheet in the treatment liquid, pulling out the immersed paper ventilation sheet and then drying it. In addition, the method of water-repellent treatment can be cited as a method of coating the surface of the paper ventilation sheet with the treatment liquid. In addition, as a coating method, specifically, a printing method can be cited. As a printing method, coating methods such as roller coating and spray coating, gravure printing, screen printing, etc. can be cited.

[9 Ninth embodiment] In the cover body 1 of the ninth embodiment, as shown in A and B of Figure 19, the corresponding part 5A of the joint area has a plurality of width expansion parts 80 and non-width expansion parts 81. Figures 19A and 19B are respectively a top view and a cross-sectional view for illustrating an embodiment of the cover body 1 of the sixth embodiment. In addition, Figure 19B is a cross-sectional view schematically showing the state of the longitudinal section along the Q-Q line in Figure 19A. The cover body 1 of the ninth embodiment is the same as the first to eighth embodiments except that the corresponding part 5A of the joint area has a plurality of width expansion parts 80 and non-width expansion parts 81. Regarding the description of the 9th embodiment, the description of the structure that is repeated in the 1st to 8th embodiments is omitted.

(Width expansion portion and non-width expansion portion) The portion of the joint area corresponding portion 5A whose width is twice or more relative to the width of the narrow portion reference position NBP is defined as the width expansion portion 80. In addition, the portion of the joint area corresponding portion 5A other than the width expansion portion 80 is defined as the non-width expansion portion 81. In the example of A in FIG. 18 , the width expansion portion 80 (the first width expansion portion 80A) is formed in a prescribed portion of the joint area corresponding portion 5A that intersects with the reference line segment MP. In addition, a non-width expansion portion (the first non-width expansion portion) is formed in a prescribed portion along the joint area corresponding portion 5A including the narrow portion reference position NBP. In addition, a second non-width expansion portion 81B and a third non-width expansion portion 81C are formed from the end of the first width expansion portion 80A along the joint region corresponding portion 5A, and the second width expansion portion 80B is formed between the second non-width expansion portion 81B and the first non-width expansion portion 81A. In addition, a third width expansion portion 80C is formed between the third non-width expansion portion 81C and the first non-width expansion portion 81A.

When the outer region corresponding portion 5C is assumed to be divided along the boundary line between the width expansion portion 80 and the non-width expansion portion 81, the toughness strength of the portion including the width expansion portion 80 in the outer region corresponding portion 5C is likely to be stronger than the toughness strength of the portion including the non-width expansion portion 81 in the outer region corresponding portion 5C. In A of FIG. 18 , the straight line dividing the width expansion portion 80 and the non-width expansion portion 81 is represented by a dotted line DVL. In the example of A in Figure 18, assuming that the outer area corresponding portion 5C is divided along the boundary line between the width expansion portion 80 and the non-width expansion portion 81, it is easy for the toughness strength of the portion divided as a portion including the first width expansion portion 80A, the second width expansion portion 80B and the third width expansion portion 80C to be stronger than the toughness strength of the portion divided as a portion including the first non-width expansion portion 81A, the second non-width expansion portion 81B and the third non-width expansion portion 81C.

In addition, the number of the width expansion part 80 and the non-width expansion part 81 is not particularly limited as long as they are formed in plural numbers, but from the viewpoint of easily dividing the area of the strong toughness part and the weak toughness part, the width expansion part 80 and the non-width expansion part 81 are preferably about two to twelve, and more preferably about two to six. In addition, the length of each width expansion part 80 along the joint area corresponding part 5A and the length of each non-width expansion part 81 along the joint area corresponding part 5A are preferably substantially the same.

(Narrow portion reference position) For the narrow portion reference position NBP, the position where the width of the joint area corresponding portion 5A is narrowest among the positions along the inner peripheral end of the joint area corresponding portion 5A is defined as the narrow portion reference position NBP. The width of the joint area corresponding portion 5A represents the length of the line segment passing through the joint area corresponding portion 5A in the straight line connecting the center position C and the outer periphery of the cover body 1 (the outer periphery 53 of the outer area corresponding portion 5C). In the example of A in Figure 18, the narrow portion reference position NBP is defined as the position where the line ELL extending from the reference line segment MP toward the second part 9 along the extension direction of the reference line segment MP intersects with the joint area corresponding portion 5A. In this case, the narrow portion reference position NBP and its vicinity tend to become the weakest part in toughness. In addition, the width of the outer region corresponding portion 5C of the second portion 9 is larger than that of the first portion 8. When the user holds the container 150 with the attached lid, the narrow portion reference position NBP in the second portion 9 is prone to creases. In addition, in the example of A in FIG. 18 , the narrow portion reference position NBP is defined at the position where the width of the outer region corresponding portion 5C is the largest. In this regard, when the user holds the container 150 with the attached lid, the narrow portion reference position NBP in the second portion 9 is prone to creases.

In the lid 1 of the ninth embodiment, the width-expanded portion 80 is a region with stronger toughness than the non-width-expanded portion 81. When the user holds the non-width-expanded portion 81 and the vicinity thereof in the second portion 9, a crease is easily generated in the non-width-expanded portion 81, thereby controlling the position where the crease is easily generated. In addition, since the user holds the container 150 with the lid at the second portion 9, a crease is easily generated at a specific position. Therefore, when the container 150 with the lid is held at the second portion 9, the lid 1 is creased at an unintended position, and the balance of the force applied to the lid 1 is broken, and the user can suppress the potential danger of dropping the container 150 with the lid. In addition, by making it easy to generate a crease at a specific portion of the second portion 9 of the lid body 1, the user can hold the container 150 with the lid body at the creased portion, thereby making it difficult for the user's hand to come into contact with the edge 103 of the container 101. Even if the temperature of the edge 103 of the container 101 rises, it is possible to prevent the heat of the edge 103 from becoming a hindrance when carrying the container 150 with the lid body.

[6 Application Examples] As shown in A and B of FIG. 14 , the cover 1 of the first embodiment can be used in a container 150 with a cover attached. FIG. 14 A is a perspective view showing an embodiment in which the cover 1 of the first embodiment is joined to a container 101 having an opening 102 formed at the upper end, and an edge 103 formed on the outer periphery of the opening 102. FIG. 14 B is a cross-sectional view schematically showing the state of a longitudinal section (L-L longitudinal section) in FIG. 14 A. The container 150 with a cover attached will be described further using FIG. 14 A and B.

(Container with lid) The container with lid 150 has a joint 151 where the container 101 and the lid 1 are joined, and the area of the lid 1 where the joint 151 is formed is a joining area R. The method for joining the lid 1 and the container 150 is not particularly limited, and a joining method such as a press-welding method and a heat-welding method (heat sealing) can be appropriately used. The following is an example of using the lid 1 of the first embodiment in the container 150 with lid.

The container 101 has: a container body 110 having a cylindrical side wall 104 and a bottom 107 whose diameter increases as it goes upward (becomes thinner at the top toward the bottom), and a space 105 formed inside; and an opening 102 that opens at the upper end of the container body 110 (the upper end of the side wall 104). Although not shown, the opening 102 of the container 101 is formed in a circular shape. However, the container 101 shown here is an example and does not limit the structure of the container 101. For example, the container 101 may also have the opening 102 formed in a rectangular shape. The container 101 only needs to be able to cover the opening 102 with the lid 1. In addition, the items stored in the interior of the container 101 (the space 105) are not particularly limited, and examples thereof include liquid items, solid items, or a combination thereof.

In the container shown in A and B of Fig. 14, the edge 103 of the opening 102 has a flange. The flange may be a rolled portion 108 formed by rolling outward a member forming the container body 110, or may be a portion (curtain) extending outward on a plane.

In addition, the cover 1 of the first embodiment can also be used in combination with a container 101 having an opening 102.

The situation shown in [6 Applicable Example] above is not limited to the case of using the cover 1 of the first embodiment. The second to ninth embodiments can also be used as a component forming a container 150 with a cover body to be joined to the container 101 in the same manner as the cover 1 of the first embodiment (not shown). In addition, the cover 1 of the second to ninth embodiments can also be used as a combination with the container 101 having the opening 102.

As described above, the cover 1 of the present invention can be applied to such various types of cover 1. In addition, it can also be applied to cover 1 in forms other than those described above. The cover of the present invention is described in detail above, but the above is only an example of the cover of the present invention and is not limited to these. Therefore, it can be appropriately changed within the scope of the present invention. In addition, the structure of the cover described above can be used independently of the structure of the cover of each example, or the structure of the cover of each example can be appropriately combined for application.

Based on the above description of this specification, the present invention can adopt the following structures (1) to (19).

(1) A cover body formed in a manner capable of being joined to a container, the container having an opening formed at an upper end and an edge forming the outer periphery of the opening, the cover body having: a joining area corresponding portion corresponding to an area along the edge of the container where the cover body joins to the container; a cover area corresponding portion consisting of a portion located on the inner side relative to the inner periphery of the joining area corresponding portion; and an outer side area corresponding portion including the joining area corresponding portion and consisting of a portion located on the outer side relative to the inner periphery of the joining area corresponding portion, when the outer side area corresponding portion is viewed from above, When the outer area corresponding part and the joint area corresponding part are divided by a line segment, the line segment is a line segment connecting the center position defined as the center of the cover area corresponding part and the outer periphery of the outer area corresponding part, and the portion dividing the outer area corresponding part is set as the first dividing part, and the portion dividing the joint area corresponding part is set as the second dividing part, and the line segment that makes the length of the first dividing part the smallest is used as the reference line segment, the outer area corresponding part is configured to meet the following conditions: A plurality of similar shapes with different diameters are defined, and these similar shapes pass through a common point defined at the position of the reference line segment and the position of the second dividing portion and are contained in the area of the corresponding portion of the outer region. (2) The lid according to (1), wherein the reference line segment sets the difference between the length of the first dividing portion and the length of the second dividing portion to a minimum. (3) The lid according to (1) or (2), wherein the line segment passing through a predetermined area of the corresponding portion of the outer region corresponds to the reference line segment. (4) A cover body according to any one of (1) to (3) above, wherein, when a straight line is set as a dividing straight line, which extends along the surface direction of the joint area corresponding part and in a direction perpendicular to the extension direction of the reference line segment and passes through the center of the cover area corresponding part to divide the outer area corresponding part, and in the outer area corresponding part divided by the dividing straight line, a portion including a position of the outer area corresponding part corresponding to the reference line segment is set as the first portion, and a portion other than the first portion is set as the second portion, the area of the second portion is larger than the area of the first portion. (5) A cover according to (4), wherein, the first part is formed such that the length of the first dividing portion becomes longer as the first dividing portion is located farther from the reference line segment along the outer periphery of the outer region corresponding portion. (6) A cover according to any one of (1) to (5), wherein, an extension portion is formed in the outer region corresponding portion. (7) A cover according to any one of (1) to (6), wherein, a groove portion is formed in the cover region corresponding portion. (8) A cover according to any one of (1) to (7), wherein, an insertion port is formed in the cover region corresponding portion. (9) A cover body according to (8), wherein: A fragile portion for guiding the separation position in the cover area corresponding portion is provided as the insertion port in the cover area corresponding portion, The fragile portion has a plurality of penetration portions and at least one continuous portion formed between at least two of the penetration portions. (10) A cover body according to any one of (1) to (9), wherein: The cover area corresponding portion has: a base having a small opening portion having an opening area smaller than that of the opening portion of the container; a small cover portion for opening and closing the small opening portion; and a hinge portion for connecting the base and the small cover portion, The small cover portion is configured to be rotatable relative to the base with the hinge portion as an axis. (11) A lid according to (10), wherein a gripping portion is provided on the upper surface side of the small lid. (12) A lid according to (11), wherein the gripping portion has a pull-tab component, and the pull-tab component is joined to the upper surface side of the small lid. (13) A lid according to any one of (1) to (12), wherein the lid is formed of a paper material. (14) A lid according to any one of (1) to (13), wherein the plurality of similar shapes are a plurality of circles having different diameters. (15) A lid according to any one of (1) to (14), wherein the lid has a breathable sheet, and at least a portion of the breathable sheet is provided on at least a portion of the corresponding portion of the lid region. (16) A cover according to any one of (1) to (15), wherein it has a window portion, and the window portion is formed in at least a portion of the cover area corresponding portion. (17) A cover according to any one of (1) to (16), wherein in the above-mentioned joint area corresponding portion, the position where the width of the above-mentioned joint area corresponding portion is narrowest is set as the narrow portion reference position, the portion whose width is more than twice the width of the above-mentioned narrow portion reference position is set as the widening portion, and the portion other than the widening portion is set as the non-widening portion, the widening portion and the non-widening portion are respectively formed in plurality. (18) A container with a lid, comprising: The lid described in any one of (1) to (17) above; and The container, wherein the container has the opening formed at the upper end, and The lid is joined to the container. (19) A combination of a lid and a container, comprising: The lid described in any one of (1) to (18) above; and The container, wherein the container has the opening formed at the upper end.

1: Cover body 5A: Joint area corresponding part 5B: Cover area corresponding part 5C: Outer area corresponding part 6: First dividing part 7: Second dividing part 8: First part 9: Second part 11: Extension part 12: Insertion port 13: Through-hole part 14: Fragile part 15: Continuous part 16: Exposed surface 20: Obstruction part 20A: Inner edge 21: Height difference part 22: Groove part 22A: Outer wall 22B: Inner wall 22C: Bottom 23: Plane part 30: Label part 30A: Base end 30B: Outer periphery 31: Display part 32: Content identification part 41: Window part 42: Opening hole 43: Cover sheet 45: Through-hole part 46: Breathable sheet 47: Slit part 48: Insertion port 49: Gas-liquid separation material 50: Paper ventilation sheet 51: Outer periphery 52: Inner periphery 53: Outer periphery 62: Base part 63: Small cover part 64: Hinge part 66: Small opening part 71: Gripping part 72: Retention structure forming part 73: Pull tab part 75: Claw part 76: Support part 77A: One end part 77B: The other end part 78: Pull tab joint part 80: Width expansion part 80A: 1st width expansion part 80B: 2nd width expansion part 80C: 3rd width expansion part 81: Non-width expansion part 81A: 1st non-width expansion part 81B: 2nd non-width expansion part 81C: 3rd non-width expansion part 101: Container 102: Opening part 103: Edge part 104: Side wall 105: Space part 107: Bottom part 108: Curled part 110: Container body 150: Container with lid 151: Joint part 163: Outer periphery 164: Front edge part 164A: Top 166: Opening edge C: Center position DL: Boundary DVL: Dashed line ELL: Line F1: Arrow F2: Arrow LU: Position M: Line segment MP: Base line segment Mα1: Line segment N: Position N1: Specified position NB1: Protrusion start position NB2: Protrusion start position NBP: Narrow part base position NK: Straight line NP: Dividing straight line P: Region R: Joint region SC1: Circle SC2: Circle SH: Similar shape SN: Selected position V: Section WL: Width α: Azimuth

In [Fig. 1], A of Fig. 1 is a top view showing an embodiment of the cover body of the first embodiment. B of Fig. 1 is a cross-sectional view schematically showing the state of the longitudinal section along the line A-A in A of Fig. 1. In [Fig. 2], A and B of Fig. 2 are top views showing an embodiment of the cover body of the first embodiment. [Fig. 3] is a top view of an embodiment of the cover body for explaining the variant 1 and variant 2 of the first embodiment. In [Fig. 4], A of Fig. 4 is a top view showing an embodiment of the cover body of the second embodiment. B of Fig. 4 is a cross-sectional view schematically showing the state of the longitudinal section along the line B-B in A of Fig. 4. In [Fig. 5], A of Fig. 5 is a top view showing an embodiment of the cover body of the second embodiment. B of FIG. 5 is a cross-sectional view schematically showing the state of the longitudinal section along the line CC in A of FIG. 5. In [FIG. 6], A of FIG. 6 is a top view showing an embodiment of the cover body of the modification 3 of the first embodiment. B of FIG. 6 is a cross-sectional view schematically showing the state of the longitudinal section along the line D-D in A of FIG. 6. In [FIG. 7], A of FIG. 7 is a top view showing an embodiment of the cover body of the third embodiment. B of FIG. 7 is a cross-sectional view schematically showing the state of the longitudinal section along the line E-E in A of FIG. 7. In [FIG. 8], A of FIG. 8 is a top view showing an embodiment of the cover body of the third embodiment. B of FIG. 8 is a cross-sectional view schematically showing the state of the longitudinal section along the line F-F in A of FIG. 8. In [Fig. 9], Fig. 9A is a top view showing an embodiment of the cover body of the third embodiment. Fig. 9B is a cross-sectional view schematically showing the state of the longitudinal section along the line G-G in Fig. 9A. In [Fig. 10], Fig. 10A is a top view showing an embodiment of the cover body of the third embodiment. Fig. 10B is a cross-sectional view schematically showing the state of the longitudinal section along the line H-H in Fig. 10A. In [Fig. 11], Fig. 11A is a top view showing an embodiment of the cover body of the fourth embodiment. Fig. 11B is a cross-sectional view schematically showing the state of the longitudinal section along the line I-I in Fig. 11A. In [Fig. 12], Fig. 12A is a top view showing an embodiment of the cover body of the fourth embodiment. B of FIG. 12 is a cross-sectional view schematically showing the state of the longitudinal section along the J-J line in A of FIG. 12. In [FIG. 13], A of FIG. 13 is a top view showing an embodiment of the lid body of the fifth embodiment. B of FIG. 13 is a cross-sectional view schematically showing the state of the longitudinal section along the K-K line in A of FIG. 13. In [FIG. 14], A of FIG. 14 is a three-dimensional view showing an embodiment of a container with a lid body. B of FIG. 14 is a cross-sectional view schematically showing the state of the longitudinal section along the L-L line in A of FIG. 14. In [FIG. 15], A of FIG. 15 is a top view showing an embodiment of the lid body of the sixth embodiment. B of FIG. 15 is a cross-sectional view schematically showing the state of the longitudinal section along the M-M line in A of FIG. 15. In [Figure 16], A of Figure 16 is a top view showing an embodiment of the cover body of the seventh embodiment. B of Figure 16 is a cross-sectional view schematically showing the state of the longitudinal section along the line N-N in A of Figure 16. In [Figure 17], A of Figure 17 is a top view showing an embodiment of the cover body of the seventh embodiment. B of Figure 17 is a cross-sectional view schematically showing the state of the longitudinal section along the line O-O in A of Figure 17. In [Figure 18], A of Figure 18 is a top view showing an embodiment of the cover body of the eighth embodiment. B of Figure 18 is a cross-sectional view schematically showing the state of the longitudinal section along the line P-P in A of Figure 18. In [Figure 19], A of Figure 19 is a top view showing an embodiment of the cover body of the ninth embodiment. B of FIG. 19 is a cross-sectional view schematically showing the state of the longitudinal section along the Q-Q line in A of FIG. 19 .

1: Cover

5A: Corresponding part of the joint area

5B: Covering area corresponding part

5C: Corresponding part of the outer area

51: Periphery

52: Inner periphery

R:Joint area

Claims (19)

A cover body is formed in a manner capable of being joined to a container, wherein the container has an opening formed at an upper end and an edge forming the outer periphery of the opening, wherein the cover body has: a joining area corresponding portion corresponding to an area along the edge of the container where the cover body joins to the container; a cover area corresponding portion consisting of a portion located inside relative to the inner periphery of the joining area corresponding portion; and an outer area corresponding portion including the joining area corresponding portion and consisting of a portion located outside relative to the inner periphery of the joining area corresponding portion; when the outer area corresponding portion is viewed from above, When the outer area corresponding part and the joint area corresponding part are divided by a line segment, the line segment is a line segment connecting the center position defined as the center of the cover area corresponding part and the outer periphery of the outer area corresponding part, and the portion dividing the outer area corresponding part is set as the first dividing part, and the portion dividing the joint area corresponding part is set as the second dividing part, and the line segment that makes the length of the first dividing part the smallest is used as the reference line segment, the outer area corresponding part is configured to meet the following conditions: A plurality of similar shapes with different diameters are defined, and these similar shapes pass through a common point defined at the position of the reference line segment and the position of the second dividing portion and are contained within the region corresponding to the outer region. The cover body according to claim 1, wherein the reference line segment sets the difference between the length of the first dividing portion and the length of the second dividing portion to the minimum. According to the cover body described in claim 1, the line segment passing through the predetermined area of the corresponding portion of the outer area corresponds to the reference line segment. According to the cover body described in claim 1, wherein, when the following straight line is set as a dividing straight line, the straight line extends along the surface direction of the above-mentioned joint area corresponding part and in a direction perpendicular to the extension direction of the above-mentioned reference line segment and passes through the above-mentioned center of the above-mentioned cover area corresponding part to divide the above-mentioned outer area corresponding part, and in the above-mentioned outer area corresponding part divided by the above-mentioned dividing straight line, the part including the position of the above-mentioned outer area corresponding part corresponding to the above-mentioned reference line segment is set as the first part, and the part other than the above-mentioned first part is set as the second part, the area of the above-mentioned second part is larger than the area of the above-mentioned first part. According to the cover body described in claim 4, the first portion is formed so that the length of the first dividing portion becomes longer as the first dividing portion is located farther from the reference line segment along the outer periphery of the corresponding portion of the outer region. According to the cover body described in claim 1, an extension portion is formed at a portion corresponding to the outer region. According to the cover body described in claim 1, a groove portion is formed in the corresponding portion of the cover area. According to the cover body described in claim 1, an insertion port is formed in the corresponding portion of the cover area. According to the cover body described in claim 8, a fragile portion for guiding the separation position in the cover area corresponding portion is provided as the insertion port in the cover area corresponding portion, the fragile portion has a plurality of penetration portions and at least one continuous portion formed between at least two of the penetration portions. According to the lid body described in claim 1, the lid region corresponding portion comprises: a base having a small opening, the small opening having an opening area smaller than the opening of the container; a small lid opening and closing the small opening; and a hinge connecting the base and the small lid, wherein the small lid is configured to be rotatable relative to the base with the hinge as an axis. According to the cover body described in claim 10, a gripping portion is provided on the upper surface side of the small cover portion. According to the cover body described in claim 11, the grip portion has a pull-tab component, and the pull-tab component is joined to the upper surface side of the small cover portion. According to claim 1, the cover is formed of a paper material. The cover according to claim 1, wherein the plurality of similar shapes are a plurality of circles with different diameters. According to the cover body described in claim 1, it has a breathable sheet, and at least a portion of the breathable sheet is provided at least a portion of the corresponding portion of the cover area. According to the cover body of claim 1, it has a window portion, and the window portion is formed in at least a part of the corresponding portion of the cover area. According to the cover body described in claim 1, In the case where the position where the width of the above-mentioned joint area corresponding part is the narrowest in the above-mentioned joint area corresponding part is set as the narrow part reference position, the part whose width is more than twice the width of the above-mentioned narrow part reference position is set as the widened part, and the part other than the above-mentioned widened part is set as the non-widened part, the above-mentioned widened part and the above-mentioned non-widened part are respectively formed in plurality. A container with a lid, comprising: the lid as described in claim 1; and the container, wherein the container has the opening formed at the upper end, and the lid is joined to the container. A combination of a lid and a container, comprising: The lid as described in claim 1; and the container, wherein the container has the opening formed at the upper end.