TW202413222A - Lid, container with lid, combination of lid and container, and method of manufacturing the lid - Google Patents

Abstract

Provided are a lid body, a container with a lid body, a combination of a lid body and a container, and a method for manufacturing a lid body, which can inhibit water from penetrating into fibers constituting a lid body and can bond a container to the lid body by a sealing method even if the type of resin constituting the resin coating formed on the surface of the container is diverse. The lid body is formed to be in contact with a container having an edge and is formed from a blank having a fiber sheet including fibers formed from a paper-based raw material, and a resin material is attached to the fibers forming at least a portion of the interior of the fiber sheet.

Description

Cover, container with cover, combination of cover and container, and method for manufacturing cover

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

A method of storing food and drink (hereinafter also referred to as "content") in a container having an opening formed at an upper end and attaching a lid to provide the container in a sealed state is widely performed.

As a lid body mounted on a container, from the viewpoint of reducing the environmental burden, a lid body using a paper-based material is sought. As a method of mounting a lid body on a container, a method of joining the lid body to the peripheral edge of the container forming the upper end opening using a method such as heat pressing (sealing method) is known. As a method of taking out the contents accommodated in the lid body, a method of removing the lid and a method of providing a pull tab as in the lid body described in Patent Document 1 are known. In the lid body disclosed in Patent Document 1, if the user pinches the pull tab and pulls it up, a bell-shaped or gourd-shaped hole opens to form a drinking opening.

In addition, as a method for mounting a lid on a container, the following method is known: when the lid has a top portion, a curved portion, and a side wall portion, a structure such as a combination of the curved portion or the top portion and the side wall portion is fitted into the edge of the container, thereby forming a state in which the lid is in contact with the edge of the outer periphery of the container forming the upper end opening (fitting method). As a method for forming such a lid, a method of forming by shaping a blank for forming the lid is known. [Prior art literature] [Patent literature]

Patent Document 1: International Publication No. 2016/069755

[The problem the invention is trying to solve]

In the technology described in Patent Document 1, when the cover is formed of a paper-based material, there is a risk that moisture may penetrate into the fibers constituting the cover, and the rigidity of the cover may be greatly damaged, thereby reducing the strength of the cover. Therefore, there is room for improvement in suppressing moisture from penetrating into the fibers constituting the cover.

In addition, it is also considered to form a resin layer on the surface of the lid (on the opposite surface facing the container, etc.) in order to inhibit the penetration of water. However, a resin coating for waterproofing the container is usually formed on the surface of the container. Depending on the material of the resin material constituting the resin layer, there is a possibility that the adhesion with the resin constituting the resin coating is impaired, and it is difficult to bond the container and the lid by the sealing method. Therefore, there is still room for improvement in that the container and the lid can be bonded by the sealing method even if the type of resin constituting the resin coating formed on the surface of the container is diversified.

In addition, when the lid is formed of a paper material, when the lid is formed into a top portion, a curved portion, and a side wall portion by shaping the blank, the shape may be restored due to the restoring force of the paper material after the side wall portion, the curved portion, etc. are formed. When the curved portion, etc., has restored its shape, even if the lid is fitted into the container, the contact between the lid and the container is loose, and a gap between the lid and the container is easily generated, and there is a risk that the contents of the container will fall out from the gap.

The present invention is made in view of such problems, and its purpose is to provide a lid, a container with a lid, a combination of a lid and a container, and a method for manufacturing the lid, which can suppress water from penetrating into the fibers constituting the lid and can bond the container and the lid by a sealing method even if the resin constituting the resin coating formed on the surface of the container is of various types. In addition, as another purpose of the present invention, a lid, a container with a lid, a combination of a lid and a container, and a method for manufacturing the lid are provided, which can suppress the shape restoration of the blank after shaping.

The present invention is based on the following aspects (1) to (21).

(1) A lid body, which is formed to be in contact with a container having an edge and is formed from a blank, the blank having a fiber sheet including fibers formed from a paper-based material, and a resin material is attached to the fibers forming at least a portion of the interior of the fiber sheet. (2) The lid body as described in (1), which has a joint area corresponding portion corresponding to a region joined to the container along the edge of the container, and a lid area corresponding portion composed of a portion located on the inner side relative to the joint area corresponding portion, and the resin material is attached to the fibers forming at least a portion of the interior of the fiber sheet in at least a portion corresponding to the joint area corresponding portion. (3) The cover as described in (2) above, which has a through portion cut from one side of the blank to the other side, the cross section of the fiber sheet is exposed at the peripheral surface of the through portion, and the resin material is exposed at least in a portion of the cross section. (4) The cover as described in (3) above, which has an inclined portion, the peripheral surface of the through portion being set as an end, and the inclined portion is inclined upward in a direction away from the end. (5) The cover as described in (4) above, wherein the density of the fibers constituting the fiber sheet in the inclined portion is higher as the position is closer to the end of the inclined portion. (6) The cover body as described in (3) above, wherein a weakened portion for guiding the cut-off position in the cover area corresponding portion is provided in the cover area corresponding portion, and the weakened portion has a plurality of the through portions and at least one continuous portion formed between at least two of the through portions. (7) The cover body as described in (6) above, wherein the continuous portion has a half-cut structure. (8) The cover body as described in (6) above, wherein the weakened portion has a plurality of the through portions formed in a radial shape around the continuous portion. (9) The lid body as described in (3) above, wherein the lid region corresponding portion comprises: a base having a small opening portion having an opening area smaller than the opening portion surrounded by the edge portion of the container; a small lid portion for opening and closing the small opening portion; and a hinge portion connecting the base and the small lid portion; the small lid portion is configured to be rotatable relative to the base portion about the hinge portion; and at least a portion of the through portion is formed at a boundary position between the outer periphery of the small lid portion and the opening edge of the small opening portion. (10) The lid body as described in (9) above, wherein a grip portion is provided on the upper surface side of the small lid portion. (11) A lid as described in (10) above, wherein the grip portion has a pull-tab member, and the pull-tab member is joined to the upper surface side of the small lid portion. (12) A lid as described in (9) above, which has a retaining structure that retains the small lid portion in a state where the small opening portion is opened by rotating the small lid portion relative to the base portion about the hinge portion. (13) A lid as described in (9) above, wherein an extension portion is formed on the outer periphery of the base portion, and the base portion and the extension portion are formed integrally from the blank. (14) A lid as described in (13) above, wherein the hinge portion is formed between the extension portion and the front end of the small lid portion. (15) The lid as described in (9) above, which has a retaining structure, which retains the small lid in a state where the small opening is opened by rotating the small lid relative to the base with the hinge as the axis; a gripping portion is provided on the upper surface side of the small lid; a claw portion is provided on the gripping portion; an extension portion is formed on the outer periphery of the base; the extension portion and the receiving portion form the retaining structure. (16) The lid as described in (1) above, wherein a bulge is formed. (17) The lid as described in (1) above, wherein at least a portion of the resin material is impregnated between at least a portion of the fibers. (18) A container with a cover, comprising the cover as described in (1) above, and the container having the edge, wherein the container with a cover joins the cover to the container. (19) A combination of a cover and a container, comprising the cover as described in (1) above, and the container having the edge. (20) A method for manufacturing a cover, comprising: an impregnation step of impregnating a fiber sheet in an impregnation liquid containing a resin material; and a drying step of drying the fiber sheet containing the impregnation liquid. (21) A method for manufacturing a cover as described in (20) above, wherein a shaping treatment is performed on the fiber sheet containing the impregnation liquid in the middle of the drying step or before the drying step. [Effect of the invention]

According to the present invention, it is possible to provide a lid, a container with a lid, a combination of a lid and a container, and a method for manufacturing a lid, which can suppress water from penetrating into fibers constituting the lid and can bond a container and the lid by a sealing method even if the resin constituting the resin coating formed on the surface of the container is of various types. Furthermore, it is possible to provide a lid, a container with a lid, a combination of a lid and a container, and a method for manufacturing a lid, which can suppress the restoration of the shape of the blank after the blank is formed by shaping the blank.

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

Hereinafter, the first embodiment, the second embodiment, the third embodiment, the fourth embodiment, the fifth embodiment, the sixth embodiment, the seventh embodiment, the eighth embodiment and applicable examples related to the present invention will be described in sequence with reference to the drawings. In this specification and drawings, structures having substantially the same functional configuration are labeled with the same drawing reference numerals to omit repeated descriptions.

The following description is a suitable specific example of the present invention, and the content of the present invention is not limited to these embodiments. In addition, in the following description, although the directions such as front and back, left and right, up and down, and the direction of the horizontal plane are shown for the convenience of description, the content of the present invention is not limited to these directions. In the examples of Figures 1 to 21, the Z-axis direction is set as the up and down direction (the upper side is the +Z direction, and the lower side is the -Z direction), the X-axis direction is set as the front and back direction (the rear side is the +X direction, and the front side is the -X direction), the directions along the mutually orthogonal X-axis and Y-axis determined on the plane with the Z-axis direction as the normal are set as the X-axis direction and the Y-axis direction, and the plane where the X-axis and the Y-axis are located, that is, the XY plane is set as the horizontal plane, and the description is based on these. The relative size ratios such as the sizes shown in each of FIGS. 1 to 21 are described for the sake of convenience, and the actual size ratios are not limited unless otherwise specified.

[1  First embodiment] [1-1  Structure] The cover 1 of the first embodiment is formed to be able to contact with a container 101, as described later using FIG. 14A, FIG. 14B, etc., and the container 101 has an opening 102 formed at the upper end and an edge 103 forming the outer periphery of the opening 102 and serving as an upper edge. Regarding the state in which the cover 1 contacts the container, the cover 1 is formed to be able to join with the container 101 having an opening 102 formed at the upper end (the opening 102 is formed by a portion surrounded by the edge 103) and an edge 103 forming the outer periphery of the opening 102 and serving as an upper edge, as shown in FIG. 14A and FIG. 14B. Fig. 14A and Fig. 14B are a perspective view and a cross-sectional view showing an example of a container 150 with a lid body obtained by joining the lid body 1 shown in Fig. 1A, Fig. 1B and Fig. 1C to a container 101. The lid body 1 can be used by joining along the edge 103. In the lid body 1, the area joined to the edge 103 when the lid body 1 is viewed from above is called the joining area R. Fig. 1A is a top view showing an embodiment of the lid body 1. Fig. 1B is a cross-sectional view schematically showing a longitudinal section along the A-A line of Fig. 1A. Fig. 1C is a diagram showing a state in which a part of the peripheral surface 11 of the through-portion 10 described later is enlarged. In addition, as the container 101, it is more preferable to use a container having flexibility at the edge 103 of the opening 102. However, these contents do not prohibit the container 101 from being a container with low or almost no flexibility, such as a metal container.

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

(Blank material) The lid 1 is formed of a blank material 30. The blank material 30 is obtained by processing a sheet formed of a material corresponding to the material of the lid 1 into a shape corresponding to the shape of the lid 1. In addition, the lid 1 is formed of the blank material 30 is not limited to the case where the lid 1 is formed only of the blank material 30, including the case where the lid 1 has a structure in which a pull-tab member 22 and other components are mounted on the blank material 30, and also includes the case where the lid 1 is subjected to various processing such as shaping processing (embossing processing, etc.) on the blank material 30.

(Material of blank) The blank 30 is formed of a sheet having a fiber sheet 31 and a resin material 32, wherein the fiber sheet 31 has fibers containing a paper-based raw material. In the example of the cover 1 of the first embodiment shown in FIG1A, as shown in FIG1C, the sheet forming the blank 30 has a structure in which the resin material 32 is attached to at least a portion of the fiber 31A forming the inside of the fiber sheet 31. The blank 30 has a structure in which the resin material 32 is contained in at least a portion of the fiber 31A forming the inside of the fiber sheet 31, similarly to the sheet.

(Fiber sheet containing paper-based raw materials) As the fiber sheet 31 containing paper-based raw materials, there can be listed so-called paper obtained by taking a pulp of a 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 open 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 pile to each other by an adhesive, etc., so-called airflow mesh sheets, etc., etc., etc. In addition, the fiber sheet containing paper-based raw materials includes a fiber sheet having a stacked structure obtained by stacking a plurality of sheets of the above-mentioned paper. In addition, the fiber sheet 31 includes sheets of fibers other than paper pulp, such as chemical fibers, fibers imparted with functions such as water resistance, metal fibers, and glass fibers, in addition to paper raw materials.

The fiber sheet 31 may be composed of only the fibers 31A (intertwined structure of only the fibers 31A), or may have a structure in which a plurality of fibers 31A are crosslinked by a crosslinking agent or the like, or may contain other additives other than the resin material described later. In the fiber sheet 31, by crosslinking a plurality of fibers 31A with a crosslinking agent, the shape of the fiber sheet 31 is stabilized and it is difficult to form a state of fiber disintegration.

(Fiber) The fiber 31A constituting the fiber sheet 31 may be composed of a single unit fiber or may have a structure in which a plurality of unit fibers are intertwined. Fibers having either structure may be included in the fiber sheet 31. The fiber sheet 31 is preferably formed in a state in which a plurality of fibers having such a structure are further intertwined.

(Paper raw materials) As paper raw materials, in addition to raw materials consisting of pulp alone, raw materials containing non-pulp natural fibers, synthetic fibers, recycled fibers, etc. can also be used, but the pulp preferably contains 50 mass% or more, more preferably 70 mass% or more, and further preferably 80 mass% or more, but it is particularly preferred that it is composed of 100 mass% of pulp. Paper raw materials can also be used as composite materials with wood raw materials such as non-woven fabrics and wood chips, and raw materials such as aluminum foil. In the case of a composite material, it is preferred that the composite material as a whole contains 50 mass% or more of pulp, and it is particularly preferred that it contains 80 mass% or more of pulp. The higher the pulp content, the easier it is for the paper raw material to be biodegraded, so it is better.

(Resin material) The resin material 32 attached to the fiber 31A is not particularly limited, and examples thereof include synthetic resins, natural resins, and the like. Examples of synthetic resins include olefin resins such as polyethylene (PE) and polypropylene (PP), styrene resins such as polystyrene (PS), acrylic resins such as polyacrylate and polymethacrylate, vinyl resins such as polyvinyl chloride (PVC) and polyvinyl acetate, polyamide resins, polyimide resins, polyester resins such as polyethylene terephthalate (PET), fluorine resins, polycarbonate resins (PC), polyetheretherketone (PEEK), and Synthetic polymers such as polyether sulphate (PES) and other polyether resins, phenolic resins, urea resins, melamine resins, epoxy resins, polyurethane resins, silicone resins, polyacetal resins, polysulfone resins, polyetherimide resins, polybutylene terephthalate (PBT) and other thermosetting resins, polyvinyl alcohol (PVA), ethylene-vinyl acetate copolymers (EVA), polyvinyl alcohol derivatives, polymers or copolymers of unsaturated carboxylic acids or their salts.

The resin material 32 is preferably a biodegradable resin with less environmental pollution problems among various resins. Examples of biodegradable resins include microbial biodegradable resins such as polyhydroxy fatty acid esters (PHA) and PHA copolymers; natural biodegradable resins such as cellulose derivatives such as cellulose acetate and starch resins with starch such as corn starch as the main raw material; lactic acid resins such as polylactic acid (PLA), polylactic acid/polycaprolactone copolymers, polylactic acid/polyether copolymers, polybutylene succinate (PBS), polybutylene succinate-adipate (PBSA), polyethylene terephthalate succinate (PET), polybutylene terephthalate succinate (PES), polybutylene terephthalate succinate (PES-ADIP ... succinate: PETS) and other succinic acid resins, chemically synthesized biodegradable resins such as polycaprolactone and polyvinyl alcohol (PVA), polysaccharide derivatives such as carboxymethyl cellulose (CMC), carboxyethyl cellulose, carboxymethylated starch or its salts, starch, methyl cellulose, ethyl cellulose, nitrocellulose, cellulose acetate and other cellulose resins, natural polysaccharides such as guar gum, trant gum, xanthan gum, sodium alginate, carrageenan, gum arabic, gelatin, casein, etc., as well as polyglycolic acid (PGA), polybutylene terephthalate-adipate, biodegradable polyolefins (trade name: Biorecover, trade name; CraDrop, etc.).

(Resin material attachment structure) At least a part of the resin material 32 is attached to at least a part of the fiber 31A forming the inside of the fiber sheet 31. The case where the resin material 32 is attached to the fiber 31A includes the case where the resin material 32 is attached to the surface of the fiber 31A and the case where the resin material 32 is impregnated inside the fiber 31A. In addition, when the fiber 31A constituting the fiber sheet 31 includes non-pulp-based natural fibers or synthetic fibers, recycled fibers, etc. in addition to pulp, at least a part of the resin material 32 is attached to the fibers formed of pulp in the fiber 31A. That is, in the cover 1, it is suitable that at least a part of the resin material 32 is attached to the fiber formed of pulp in the fiber 31A. However, this does not prohibit at least a part of the resin material 32 from being attached to natural fiber or synthetic fiber, recycled fiber, etc., which is not pulp, in the fiber 31A.

In addition, the resin material 32 may fill at least a portion of the space (gap space) formed between the fibers 31A constituting the fiber sheet 31 (i.e., a state may be formed in which the resin material 32 is impregnated between at least a portion of the fibers 31A), or the gap space may be substantially occupied by the resin material 32.

The cover body 1 has a joint region corresponding portion 5A and a cover region corresponding portion 5B.

(Jointing area corresponding portion) The joining area corresponding portion 5A is a portion of the lid 1 corresponding to the area 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). In the container 150 with a lid, the joining area corresponding portion 5A is a portion of the lid 1 that forms the joining portion 151 between the lid 1 and the container 101. Specifically, when the lid 1 is viewed from above (when the Z-axis direction (up and down direction) is set as the line of sight in the example of FIG. 1A ), the portion forming the joining area R is determined as the joining area corresponding portion 5A. The joining area corresponding portion 5A is usually formed in a ring shape as shown in FIG. 1A . In particular, as shown in FIG1A, when the edge 103 of the container 101 is roughly formed into a circular ring, the joint area R is formed into a circular ring, and the joint area corresponding portion 5A is also roughly formed into a circular ring 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 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 FIG1A. 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 set to be also included in the joint area corresponding portion 5A described later.

In the cover 1 shown in the example of FIG. 1A , in a portion corresponding to the joining region corresponding portion 5A, a resin material 32 is attached to fibers 31A forming at least a portion of the inside of the fiber sheet 31 .

(Lid area corresponding part) The lid area corresponding part 5B is a part of the lid body 1 that is located on the inner side relative to the joint area corresponding part 5A. That is, the lid area corresponding part 5B is a part that is located on the inner side relative to the inner edge end of the joint area corresponding part 5A, and the outer peripheral end of the lid area corresponding part 5B is common to the inner edge end 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 a case where a window part is formed in a part as will be described in the third embodiment and a case where there is a small opening part as will be described in the second embodiment, etc. In addition, as shown in the example of FIG. 1 , the portion of the cover body 1 located outside the outer peripheral end of the cover area corresponding portion 5B is referred to as the cover area non-forming portion 5C (in the second embodiment described later, the cover area non-forming portion 5C corresponds to the portion of the base 2 located outside the inner edge end of the joint area corresponding portion 5A).

(Through portion) In the lid body 1, it is preferred that a through portion 10 is formed at least in the lid region corresponding portion 5B. The through portion 10 has a structure (through structure) that cuts from one side of the blank 30 to the other side in the up-down direction (thickness direction, Z-axis direction), and is the so-called cut-in portion 8. The through portion 10 has a peripheral portion 11 and an end portion 12. The peripheral portion 11 extends in the length direction of the through portion 10, and the end portion 12 is formed at the cut-in end.

When the cover body 1 is formed with the through-portion 10, the through-portion 10 can function as an exhaust portion. Here, the exhaust portion refers to a portion that allows gas to pass from one side of the cover body 1 to the other side (from the opposite surface 73 side to the exposed surface 72 side). In addition, the through-portion 10 may have other functions in addition to functioning as an exhaust portion. For example, when the cover body 1 is used in a container 150 with a cover body, the through-portion 10 may also function as an insertion port 19 for inserting a component from the outside of the container 150 with a cover body toward the inside of the container 101 (space portion 105) or a portion constituting the insertion port 19. In the example of FIG. 1A , the cover body 1 has a through portion 10, and the through portion 10 is formed to function as an insertion port 19. For example, a straw or the like can be exemplified as a component that can be inserted from the insertion port 19. In addition, the through portion 10 shown in the example of FIG. 1A can also function as an exhaust portion as described above.

(Shape of through-portion) The shape of the through-portion 10 is not particularly limited as long as it can be formed by cutting. For example, in the example of FIG. 1A, a cut-in portion 8 is formed on the cover body 1 in the shape of a cross cut into the blank 30 in the vertical direction, and the cut-in portion 8 forms the through-portion 10. The through-portion 10 also serves as the insertion port 19 as described above. In addition, this is only an example, and the shape of the cut-in portion 8 forming the through-portion 10 is not limited to a cross shape as long as it can be used as the insertion port 19, and it can also be a C shape as shown in FIG. 4A and FIG. 4B, and various shapes such as a tongue shape can also be used. FIG. 4A and FIG. 4B are top views schematically showing another embodiment in which the cover body 1 has an insertion port 19 as the through-portion 10.

(Peripheral surface of through-portion) In the cover 1, as shown in FIG1C, in the area of the peripheral surface 11 forming the through-portion 10 (area of the peripheral surface 11), the cross section of the fiber sheet 31 is exposed. In addition, at this time, at least a portion of the resin material 32 is exposed in at least a portion of the peripheral surface 11, that is, the cross section of the fiber sheet 31. Regarding the exposure of at least a portion of the resin material 32 in the peripheral surface 11, as shown in FIG1C, there can be cited a case where a portion of the resin material 32 faces a portion of the peripheral surface 11 (the cross section area of the fiber sheet 31) and a case where a portion of the resin material 32 faces the entire area of the peripheral surface 11 (the entire cross section area of the fiber sheet 31). In the example of FIG1C, a case where the cross section of at least a portion of the fiber 31A in the peripheral surface 11 is exposed is illustrated. However, this does not prohibit the situation where at least a portion of the cross section of the fiber 31A is not exposed in the peripheral surface portion 11, nor does it prohibit the situation where the side surface of the fiber 31A is exposed.

(Inclined portion) When the through portion 10 is formed on the cover 1, it is preferred that an inclined portion 13 is formed in the portion from the periphery of the through portion 10 to the through portion 10. The inclined portion 13 represents a portion that is inclined upward in a direction away from the end 13A with the peripheral surface 11 of the through portion 10 as the end 13A. The inclined portion 13 may be formed on only one side of the cover 1 as shown in FIG. 1B and FIG. 2A, or may be formed on both sides of the cover 1 (the exposed surface 72 (non-opposing surface) and the surface facing the space portion 105 side of the container 101 (opposing surface 73)) as shown in FIG. 2B. In addition, in FIG. 1B , the inclined portion 13 is formed with an inclined surface on the exposed surface 72 side of the cover body 1 , and in FIG. 2A , the inclined portion 13 is formed with an inclined surface on the opposite surface 73 side of the cover body 1 .

(Density of fibers in the inclined portion) In the cover 1, it is preferred that the density of the fibers 31A constituting the fiber sheet 31 in the inclined portion 13 is higher as the position is closer to the end of the inclined portion. For example, as shown in FIG. 1B, FIG. 2A, and FIG. 2B, when a position P1 close to the end 13A of the inclined portion 13 and a position P2 farther from the end 13A than the position P1 are selected, the fiber sheet 31 preferably has a higher density of the fibers 31A at the position P1 than at the position P2. Such a structure can be achieved by applying a stronger pressure to the position closer to the peripheral surface 11 of the through-portion 10 when forming the through-portion 10. In this case, as shown in FIG. 1B , FIG. 2A , and FIG. 2B , the inclined portion 13 is formed in a shape that is inclined downward toward the through-portion 10 . In addition, the structure of the inclined portion and the density of the fibers in the inclined portion is the same in the through-portion formed in the second to fourth embodiments described later.

[1-2  Manufacturing method] The cover body 1 of the first embodiment can be manufactured, for example, as follows. A fiber sheet 31 formed of a material corresponding to the material of the cover body 1 as a roll sheet is immersed in an impregnation liquid (impregnation step). The impregnation liquid is a liquid containing a resin material 32 (resin-containing liquid). In the example described here, for example, the resin-containing liquid is a mixed liquid of the resin material 32, water, and a non-aqueous solvent. When the resin material 32 is contained in the cover body 1, it is possible to increase the waterproofness of the cover body 1. After the impregnation step, a step of drying the fiber sheet 31 (fiber sheet 31 containing the impregnation liquid) subjected to the impregnation step is performed (drying step). The fiber sheet 31 (fiber sheet 31 with resin material 32 attached thereto) subjected to the drying step is processed into a shape corresponding to the shape of the cover 1, thereby forming a blank 30. The blank 30 can be used directly as the cover 1. In addition, in the example of FIG. 1A, the cover 1 is formed by forming the through portion 10 by forming the cutout portion 8 on the blank 30.

In the manufacturing method described above, although acrylic resins, polyolefin resins, etc. can be exemplified as the resin material 32 contained in the impregnation liquid, biodegradable resins are preferred. The non-aqueous solvent is not particularly limited as long as it can be mixed with the resin material, and alcohol solvents such as ethanol can be exemplified.

In the drying step, the water and the non-aqueous solvent contained in the fiber sheet 31 including the impregnation liquid may be almost completely evaporated, or the water and the non-aqueous solvent may slightly remain in the fiber sheet 31 .

[1-3  Function and Effect] Previously, when the lid is formed of a paper material, there is a risk that moisture will penetrate into the fibers of the paper material constituting the lid, causing the rigidity of the lid to be greatly damaged and the strength of the lid to be reduced. In this regard, it is conceivable that a resin layer is formed on both sides of the lid (the exposed side and the opposite side) in order to suppress the penetration of moisture. However, when the container and the lid are bonded using a sealing method, there is a risk that the adhesion will be greatly reduced. That is, in general, a resin coating is formed on the surface of a container for storing items containing water, such as beverages and cooked food, in order to make the container waterproof. The material of the resin material forming the resin coating is required to be selected appropriately according to the contents contained in the container, and therefore the material of the resin material used to form the resin coating is required to be diverse. Therefore, if a resin layer is formed on the surface of the lid, depending on the material of the resin material constituting the resin layer, there is a risk that the adhesion with the resin constituting the resin coating is impaired, and it is difficult to bond the container and the lid by a sealing method. Therefore, there is room for improvement in that the container and the lid can be bonded by a sealing method even if the types of resins constituting the resin coating formed on the surface of the container are various.

In contrast, according to the lid 1 of the first embodiment, since at least a portion of the resin material 32 is attached to at least a portion of the fibers 31A forming the inside of the fiber sheet 31 (the fiber sheet 31 constituting the lid 1), the resin material 32 can suppress the penetration of water into the fibers 31A. In addition, when the sealing method is applied when the lid 1 is mounted on the container 101, since at least a portion of the fibers 31A constituting the fiber sheet 31 can exist between the fibers 31A, the resin constituting the resin coating formed on the surface of the edge 103 of the container 101 can enter the space, and the resin coating and the lid 1 can be easily bonded. That is, even if the material of the resin forming the resin coating layer lacks adhesion to the resin material 32, it becomes easy to bond the container 101 and the lid body 1 by the sealing method. Next, a modified example of the first embodiment is described.

[1-4  Modifications] (Modification 1) In the cover 1 of the first embodiment, when the cover 1 is provided with a through portion 10, as shown in FIG. 3A, the through portion 10 may form a part of the fragile portion 14. This embodiment is referred to as Modification 1 of the first embodiment. FIG. 3A is a top view schematically showing an embodiment of the cover 1 of Modification 1 of the first embodiment.

(Fragile portion) As shown in the example of FIG. 3A , the fragile portion 14 has a plurality of through-portions 10 and at least one continuous portion 15 formed between the ends 12 of at least two through-portions 10. When a force of lifting or pressing is applied to the fragile portion 14 to form a cut-off portion on the cover, the fragile portion 14 guides the position where the cut-off occurs (cut-off position). That is, the position where the cut-off occurs is formed roughly along the fragile portion. For example, in the example of FIG. 3A , if a force is applied to press the portion corresponding to the insertion port 19 from the exposed surface 72 side to the opposite surface 73 side, the continuous portion 15 is destroyed, and a cut-off occurs along the through-portion 10 with the continuous portion 15 as the end 12, forming the insertion port 19 (the insertion port 19 becomes an open state).

(Layout of the fragile portion) The layout of the fragile portion 14 is not particularly limited and can be determined according to conditions such as the function of the fragile portion 14. In the example of the fragile portion 14 shown in the example of FIG. 3A, the continuous portion 15 is formed at one place, and a total of four through portions 10 are formed. In this example, the through portions 10 are formed in a manner extending radially from the continuous portion 15 in four different directions. In addition, this is an example of the fragile portion 14. In the case where the fragile portion 14 has a plurality of through portions 10 formed radially around the continuous portion 15, the through portions 10 may extend in three directions away from the continuous portion 15, or may extend in five or more directions. In addition, the through portions 10 may extend in two directions away from the continuous portion 15.

In addition, in the example of FIG. 3A , the fragile portion 14 is formed in a cross shape, but it can also be formed in a C shape as shown in FIG. 4B . In addition, as shown in this example, the formation position of the connecting portion 15 is not limited to one place, and it can also be formed in multiple places. In the example of FIG. 4B , the connecting portion 15 is formed in three places, and the through-portions 10 are formed in two directions from each connecting portion 15 (a total of four through-portions 10). The multiple through-portions 10 are formed by the curved cut-in portion 8 so that the fragile portion 14 as a whole is roughly in the shape of the letter C.

Although the position of the fragile portion 14 is not particularly limited, it is preferably provided at the cover region corresponding portion 5B. In this case, a cutoff position is formed at the cover region corresponding portion 5B.

(Continuous portion) The continuous portion 15 may be a portion formed in a state where the blank 30 forming the lid body 1 is not penetrated, and may be a non-cut portion or a half-cut portion 16 in which the blank 30 is cut in the thickness direction within a range that avoids penetrating the blank 30 as shown in FIG. 12B. FIG. 12B is a diagram for explaining an embodiment of the half-cut portion 16. The half-cut portion 16 is defined as a portion that forms a structure that cuts the lid body 1 halfway along the thickness direction of the lid body 1, i.e., a half-cut structure. In addition, the half-cut portion 16 is not limited to a portion that cuts into half the thickness of the lid body 1 along the thickness direction of the lid body 1. The half-cut portion 16 includes a structure that avoids penetrating the lid body 1 and cuts into more than half the thickness of the lid body 1, and a structure that cuts into the thickness direction of the lid body 1 to a degree less than half the thickness of the lid body 1.

(Variant 2) In the cover 1 of the first embodiment, an extension portion may be formed as shown in FIG. 3B. This embodiment is referred to as variant 2 of the first embodiment. FIG. 3B is a top view schematically showing an embodiment of the cover 1 of variant 2 of the first embodiment.

(Extension) In the cover body 1 of the second modification of the first embodiment, the position and shape of the extension 7 are not particularly limited, but in the example of FIG. 1A , the extension 7 is formed on the outer periphery 50 of the cover region non-forming portion 5C of the cover body 1 (corresponding to the outer periphery 2A of the base 2 in the second embodiment described later), and the shape of the extension 7 is determined in such a way that the outer periphery 7A of the extension 7 becomes a mountain shape that is smoothly curved in a convex shape.

If the extension portion 7 is formed, a mark, a character, or the like indicating the container 101 corresponding to the cover 1 can be arranged on the extension portion 7. For example, characters such as S, M, and L can be arranged on the extension portion 7 by printing. Furthermore, the types of the container 101 and the cover 1 are associated with each other in the following manner: when the size of the container 101 is a small size, the cover 1 printed with the character S is used; when the size of the container 101 is a medium size, the cover 1 printed with the character M is used; and when the size of the container 101 is a large size, the cover 1 printed with the character L is used. Thus, when the cover 1 is joined to the container 101, it is possible to prevent the container 101 and the cover 1 from being joined with different combinations of wrong sizes.

Furthermore, if the extended portion 7 is formed in the lid body 1, the extended portion 7 can be used as a gripping portion.

[2  Second Implementation Form] In the above-mentioned first implementation form, the case where the through-portion 10 forms the insertion port 19 is explained as an example. The cover body 1 is not limited to this, and the through-portion 10 may also form at least a portion of the boundary between the opening edge of the small opening portion and the outer peripheral edge of the small cover portion as shown in FIG. 7A and FIG. 7B. That is, as shown in FIG. 7A and FIG. 7B, the cover body 1 has: a base portion, which has a small opening portion, and the small opening portion has an opening area smaller than the opening portion 102 of the container 101; a small cover portion, which opens and closes the above-mentioned small opening portion; and a hinge portion, which connects the above-mentioned base portion and the above-mentioned small cover portion. The implementation form having such a structure is called the second implementation form. FIG. 7A is a top view showing an example of the cover body 1 of the second embodiment. FIG. 7B is a cross-sectional view schematically showing the state of the longitudinal section along the D-D line of FIG. 7A. The second embodiment may be the same as the first embodiment except that the through portion 10 forms at least a part of the boundary between the opening edge of the small opening portion and the outer peripheral edge of the small cover portion. In addition, the insertion port 19 also shown in the first embodiment may also be formed in the second embodiment.

[2-1 Structure] The cover body 1 of the second embodiment has a base 2, a small cover 3 and a hinge 4 as shown in FIG. 7A and FIG. 7B. In the example of FIG. 7A and FIG. 7B, the cover area corresponding portion 5B of the cover body 1 has the base 2, the small cover 3 and the hinge 4, and the cover area non-forming portion 5C has the base 2.

(Base) The base 2 is defined as a portion having a bonding area corresponding portion 5A and forming a small opening portion 6. The base 2 can be defined as a portion that defines a displacement reference of a small cover portion 3 described later. In addition, in the example of FIG. 7A, when the cover body 1 is viewed from above, the base 2 and the small cover portion 3 form an exposed surface 72 of the cover body 1. In the second embodiment, when the cover body 1 is viewed from above (when the Z-axis direction (up and down direction) is set as the line of sight in the example of FIG. 7A), the bonding area corresponding portion 5A corresponds to a portion that forms the bonding area R and is formed on the base 2.

(Small opening) The small opening 6 is formed by penetrating the opposite surface 73 of the lid 1 relative to the container 101 and the non-opposite surface of the lid 1 relative to the container 101 (the exposed surface 72 of the lid 1). When the lid 1 is viewed from above, the small opening 6 is formed in a state where the opening area is smaller than the opening 102 of the container 101 on the inner side of the portion corresponding to the joint area corresponding portion 5A. The small opening 6 is a portion for forming an entrance and exit of the contents (such as beverages, food, etc.) in the space 105 of the container 101 with the lid 1 joined to the container 101. The small opening 6 forms the opening forming portion 20 in combination with the small lid 3 described later.

(Opening forming portion) As shown in FIG. 7A and the like, the opening forming portion 20 is defined as a portion having a small opening portion 6 and a small cover portion 3. In the opening forming portion 20, the small opening portion 6 opens and closes as the small cover portion 3 is displaced. The opening forming portion 20 is formed in a manner such that the small cover portion 3 closes the small opening portion 6 as shown in FIG. 7A, and the small cover portion 3 is displaced and the small opening portion 6 is opened. When the small cover portion 3 is rotated in a manner such that the small cover portion 3 is pulled up with the base portion 2 as a reference, the small opening portion 6 is exposed to form an exposed opening. That is, the opening forming portion 20 combines the small opening portion 6 and the small cover portion 3 in such a way that if the small cover portion 3 is pulled up when the cover body 1 is installed on the container 101, the space portion 105 of the container 101 can be visually recognized from the small opening portion 6.

In addition, when the small opening 6 is exposed, it can be provided as a supply port for additional liquids such as drinks or solids such as ice as described later. In addition, when there is liquid such as drinks inside the container 101 (space 105), the small opening 6 can also be used as a drinking port or pouring port for drinks.

(Small lid) A small lid 3 is provided on the lid body 1. The small lid 3 is formed to cover the small opening 6 in a manner that enables the small opening 6 to be opened and closed. In the example of FIG. 7A, as described later using FIG. 9C, the small lid 3 is formed to be displaceable to a state in which it is pulled up relative to the base 2, and the small opening 6 is formed (opened) when the small lid 3 is pulled up. In the example shown in FIG. 7A, the shape of the small lid 3 can be determined in a manner that the outer peripheral contour shape of the small lid 3 follows the shape of the opening edge 6A of the small opening 6 when the small opening 6 is closed by the small lid 3. In this case, when the small opening portion 6 is closed by the small cover portion 3, the end surface of the outer peripheral edge 3A of the small cover portion 3 is easily brought into contact with the end surface of the opening edge 6A of the small opening portion 6.

In the lid body 1 shown in the example of FIG. 7A , the small lid portion 3 is arranged on the inner side (lid area corresponding portion 5B) (center CT side) compared to the joint area corresponding portion 5A when the lid body 1 is viewed from above. The small lid portion 3 is displaced (rotated) in a manner such that the small lid portion 3 is pulled up. The small lid portion 3 is connected to the base portion 2 using the hinge portion 4. As the small lid portion 3 is pulled up with the hinge portion 4 as a support, the small opening portion 6 is exposed.

In the lid body 1, when the small lid part 3 is pulled up, the small opening part 6 is exposed as described above. This state is called the open lid state. The state in which the small opening part 6 is covered by the small lid part 3 is called the closed lid state.

In the cover body 1, even after becoming an open cover state (after the small opening portion 6 is exposed by the small cover portion 3 standing up), it can be set to a closed cover state again. When it is set to a closed cover state, the end face of the opening edge 6A of the small opening portion 6 of the base 2 can be opposite to the end face (peripheral end face) of the outer peripheral edge 3A of the small cover portion 3.

(Hinge) As described above, the cover body 1 has a hinge 4. The hinge 4 is roughly composed of a portion corresponding to a line segment connecting two base end portions 74 along the outer periphery 3A of the small cover 3, corresponding to the boundary portion of the base 2 and the small cover 3. The hinge 4 is a portion that becomes a rotation axis when the small cover 3 rotates. However, in the case where the small cover 3 rotates, it includes not only a case where the small cover 3 stands up from the base 2 at a certain angle at the position of the hinge 4, but also a case where the small cover 3 stands up while gradually bending from the hinge 4 toward the front edge 75 of the small cover 3.

The base 2 is connected to the small cover 3 at least at the hinge 4. The hinge 4 has no particular structure as long as it is a portion defined as the boundary between the base 2 and the small cover 3. The hinge 4 may be a perforated structure or a half-cut portion, similar to the connection structure 17 described later.

(Boundary between the outer periphery of the small cover portion and the opening edge of the small opening portion) At the boundary position between the outer periphery 3A of the small cover portion 3 and the opening edge 6A of the small opening portion 6, the small cover portion 3 and the small opening portion 6 may be cut off (may be in a non-connected state), or a connecting structure 17 may be formed as described later. When the small cover portion 3 and the small opening portion 6 are in a non-connected state at the boundary position between the outer periphery 3A of the small cover portion 3 and the opening edge 6A of the small opening portion 6, a through portion 10 is formed as a structural portion that cuts off the outer periphery 3A of the small cover portion 3 and the opening edge 6A of the small opening portion 6, as shown in FIG. 7B. The peripheral surface 11 of the through-portion 10 forms the end surface of the outer peripheral edge 3A of the small cover portion 3 and the end surface of the opening edge 6A of the small opening portion 6. In addition, the end 12 of the through-portion 10 is located at the base end 74 of the hub 4. The structure of the through-portion 10 is the same as that described in the first embodiment, so the description is omitted.

(Connection structure between base and small lid) In the lid body 1, at the boundary position between the outer periphery 3A of the small lid 3 and the opening edge 6A of the small opening 6, a structure (connection structure 17) in which the opening edge 6A of the small opening 6 of the base 2 and the outer periphery 3A of the small lid 3 are connected can be formed as described above. As shown in FIG12A, the connection structure 17 is preferably configured as a fragile portion 14 that is a portion that is weaker than the small lid 3. FIG12A is a diagram showing an embodiment of the case where the connection structure 17 is the fragile portion 14. By making the connection structure 17 the fragile portion 14, when the small lid 3 rotates relative to the base 2 with the hinge 4 as an axis, the fragile portion 14 can be destroyed (the continuous portion 15 is destroyed). In addition, the small cover 3 is separated from the base 2 roughly along the connecting structure 17, and stands up relative to the base 2.

(Weakened portion) The weakened portion 14 is formed by a combination of the through portion 10 and the continuous portion 15 as described in the first modification of the first embodiment. Therefore, when the connection structure 17 is the weakened portion 14, the boundary position between the outer periphery 3A of the small cover portion 3 and the opening edge 6A of the small opening portion 6 is formed by a combination of the through portion 10 and the continuous portion 15. In the example of FIG. 12A, the combined structure is a structure in which the combined structure of the continuous portion 15 and the through portion 10 is alternately arranged along the length direction of the portion where the end face of the opening edge 6A of the small opening portion 6 and the end face of the outer periphery 3A of the small cover portion 3 face each other (so-called perforated structure).

In addition, the connection structure 17 is not limited to the perforated structure, and the connection structure 17 may be entirely formed as the half-cut portion 16 as shown in Fig. 12B. The half-cut portion 16 is the same as the half-cut portion 16 described in the first embodiment using Fig. 12B, and thus its description is omitted.

Furthermore, when the connection structure 17 has the continuous portion 15 and the through portion 10, the continuous portion 15 may be a half-cut portion 16 as shown in FIG. 12B .

In the case where the cover body 1 of the second embodiment is formed with the through portion 10, the through portion 10 can also be formed as an exhaust portion at a position different from the boundary position between the outer periphery of the small cover portion and the above-mentioned opening edge of the small opening portion. For example, in the case where the connection structure 17 is formed at the boundary position between the outer periphery of the small cover portion and the above-mentioned opening edge of the small opening portion, and the connection structure 17 is formed as a half-cut portion 16 as a whole, the through portion 10 can be formed into a structure different from the connection structure 17.

In addition, the through-portion 10 can also be formed at the boundary position between the outer periphery of the small lid portion and the above-mentioned opening edge of the small opening portion, and at a position different from the boundary position. Like this, in the lid body 1 of the second embodiment, at least a part of the through-portion can be formed at the boundary position between the outer periphery of the small lid portion and the above-mentioned opening edge of the small opening portion.

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

The following further describes variations of the second embodiment.

[2-3 Variations] (Variation 1) In the cover 1 of the second embodiment, as shown in FIG. 8A, FIG. 8B, etc., a gripping portion 21 is provided on the small cover portion 3. The cover 1 having such a structure is referred to as Variation 1 of the second embodiment. FIG. 8A is a top view schematically showing an embodiment of the cover 1 of Variation 1 of the second embodiment. FIG. 8B is a cross-sectional view schematically showing the state of the longitudinal section taken along the E-E line of FIG. 8A.

The cover body 1 of the variation example 1 of the second embodiment may be the same as the above-mentioned second embodiment except that the small cover portion 3 is provided with a pinching portion 21, so the description of other structures (base 2, hub 4, etc.) except the structure of the pinching portion 21 being provided in the small cover portion 3 is omitted.

(Pinching portion) In the example of the second embodiment shown in FIG. 8A and FIG. 8B , when the small opening portion 6 is closed by the small cover portion 3, a pinching portion 21 is provided on the exposed surface of the small cover portion 3 (exposed surface 72 of the cover body 1), that is, on the upper surface side. Although the structure of the pinching portion 21 is not particularly limited as long as it is a structure that enables the small cover portion 3 to rotate around the hinge portion 4, in the example of FIG. 8A and FIG. 8B , a pull-tab member 22 is provided as the pinching portion 21.

(Pull-tab member) In the example of FIG. 8A and FIG. 8B, when the small opening portion 6 is closed by the small cover portion 3, the pull-tab member 22 joins one end 22A of the pull-tab member 22 to the small cover portion 3, and sets the other end 22B of the pull-tab member 22 as a free end. The portion of the pull-tab member 22 joined to the small cover portion 3 is called the pull-tab joint portion 23. The shape and structure of the portion of the pull-tab member 22 on the free end side (the portion on the other end 22B side) other than the pull-tab joint portion 23 of the pull-tab member 22 are not particularly limited as long as they are formed to a size and shape that allows the pull-tab member 22 to be held by a person's hand. The material of the pull-tab member 22 may be the same as the material of the blank 30 described in the first embodiment, or may be composed of a paper-based raw material.

In the cover body 1, the installation position and installation direction of the pull-tab member 22 in the small cover portion 3 are not particularly limited. In the example of Figures 8A and 8B, the pull-tab member 22 is joined to the small cover portion 3 at a position close to the front end of the small cover portion 3 (i.e., near the front end edge 75).

The method for joining the pull-tab member 22 to the small cover portion 3 (i.e., the method for forming the pull-tab joint 23) can be exemplified by various methods such as ultrasonic joining, heat sealing, and joining based on an adhesive. As the method for forming the pull-tab joint 23, among the above methods, ultrasonic joining is preferred from the viewpoints of ease of joining and strength of joining. As for the formation position of the pull-tab joint 23 in the small cover portion 3, from the viewpoint of easily raising the small cover portion 3 (rotating the small cover portion 3) by pulling up the pull-tab member 22, it is preferred to be a position deviated from the central portion of the small cover portion 3.

(Direction of the pull-tab member (installation direction)) In the lid 1, in the example of FIG. 8A, the other end 22B side (free end side) of the pull-tab member 22 is arranged closer to the hinge 4 side than the one end 22A of the pull-tab member 22. However, this is only an example, and the direction of the pull-tab member 22 may be a direction other than the direction shown in the example of FIG. 8A. For example, the pull-tab member 22 may be arranged in a manner such that the other end 22B side of the pull-tab member 22 is located farther from the hinge 4 than the one end 22A of the pull-tab member 22.

In the cover body 1 of the modification 1 of the second embodiment, the small cover part 3 can be easily pulled up by providing the gripping part 21.

(Variant 2) In the cover body 1 of the variant 2 of the second embodiment, as shown in the examples of FIG. 13A and FIG. 13B, etc., a retaining structure forming portion may also be provided, which is a portion forming a retaining structure, and the retaining structure retains the small cover part 3 in a state where the small opening part 6 is opened by rotating the small cover part 3 relative to the base part 2 with the hinge part 4 as an axis. The cover body 1 having such a structure is referred to as the variant 2 of the second embodiment. FIG. 13A is a top view schematically showing an embodiment of the cover body 1 of the variant 2 of the second embodiment. FIG. 13B is a cross-sectional view schematically showing the state of the H-H line longitudinal section of FIG. 13A.

(Retention structure forming part) The structure of the retention structure forming part is not particularly limited. For example, in the example of the cover body 1 shown in FIG. 13A and FIG. 13B, the claw portion 24 and the receiving portion 25 form the retention structure forming part.

(Claw) The claw 24 may be a portion having a structure that can be locked relative to the receiving portion 25 described later by locking or insertion, as shown in the example of FIG. 13A. In the example of FIG. 13A, the claw 24 is provided on the pull-tab member 22 as an example of the gripping portion 21. In this example, the claw 24 is formed by a cut-out portion having a contour shape such as a mountain shape at a predetermined position of the pull-tab member 22.

(Receiving portion) The receiving portion 25 is formed into a shape that can be locked or inserted into the claw portion 24. In the example of FIG. 13A, the receiving portion 25 is a slit formed by a cutout at a predetermined position of the base 2. In this case, the receiving portion 25 corresponds to the through portion 10. The receiving portion 25 is formed at a position that can be opposite to the claw portion 24 when the pull-tab member 22 is displaced by rotating the small cover portion 3.

(Formation of holding structure) When the small cover 3 is raised in the cover body 1, the gripping portion 21 is pulled up. At this time, the pull-tab member 22 is pulled up and a predetermined portion of the free end side (the other end 22B side) of the pull-tab member 22 is bent, so that the claw portion 24 becomes a shape protruding downward or upward. Then, the pull-tab member 22 is displaced in such a manner that the small cover 3 is rotated to a position where the claw portion 24 of the small cover 3 is opposite to the receiving portion 25 or a position near the position. Then, the claw portion 24 of the pull-tab member 22 is locked or inserted into the receiving portion 25. Thus, a holding structure for holding the small cover 3 while the small opening portion 6 is exposed is formed.

In the above description, the case where the holding structure forming portion is formed with the slit portion (through portion 10) as the receiving portion 25 is described, but as described later in Modification 3 of the second embodiment, the structure corresponding to the receiving portion 25 is not limited to the slit portion.

(Variant 3) The cover 1 of the second embodiment may be provided with an extension portion 7 as shown in Fig. 9A, Fig. 9B, etc., similarly to the variant 2 of the first embodiment. This method is referred to as variant 3 of the second embodiment. Fig. 9A is a top view schematically showing an embodiment of the cover of variant 1 of the second embodiment. Fig. 9B is a cross-sectional view schematically showing the state of the longitudinal section along the F-F line of Fig. 9A. In the cover 1 of the second embodiment, the structure of the extension portion 7 is the same as that of variant 2 of the first embodiment, so the description is omitted. In addition, Fig. 9A illustrates a case where the extension portion 7 is formed in the cover 1 of variant 2 of the second embodiment.

In the example of FIG. 9A , regarding the formation position of the extension portion 7, the extension portion 7 is determined on the outer periphery 2A of the base 2 in such a manner that the hub 4 is located between the front edge 75 forming the front end of the small cover portion 3 and the extension portion 7. In this case, the position of the front edge 75 of the small cover portion 3 can be set to be as far away from the position of the extension portion 7 as possible. By making the position of the front edge 75 of the small cover portion 3 as far away from the position of the extension portion 7 as possible, even if the cover body 1 is moved by a person holding the extension portion 7 by hand, the risk of the person holding the cover body 1 touching the small cover portion 3 of the cover body 1 can be suppressed, and contamination of the small cover portion 3 due to contact by the hand of the person can be suppressed.

In the cover body 1 of the modification 3 of the second embodiment, the extension portion may also have the function of the receiving portion described in the modification 2 of the second embodiment.

(Retention structure forming part) The cover body 1 shown in FIG. 9A is similar to the example of FIG. 13A, and the claw portion 24 is formed on the gripping portion 21 (the pull-tab member 22 in FIG. 13A and FIG. 9A), and the claw portion 24 and the extension portion 7 form a retention structure forming part. In the example of FIG. 9A, the extension portion 7 is formed so that when the pull-tab member 22 is displaced by rotating the small cover portion 3, the outer periphery 7A of the extension portion 7 can be opposite to the claw portion 24.

(Formation of the holding structure) In the lid body 1 shown in the example of FIG. 9A, similarly to the example of FIG. 13A, when the small lid portion 3 is erected, the pull-tab member 22 is pulled up in the direction of the arrow mark F1 in FIG. 9B. In the example of FIG. 9A, similarly to the example of FIG. 13A, by pulling up the pull-tab member 22 and bending a predetermined portion of the free end side (the other end 22B side) of the pull-tab member 22, the claw portion 24 is formed into a shape protruding downward or upward. Then, the pull-tab member 22 is displaced in such a manner that the small lid portion 3 is rotated to a position where the claw portion 24 is opposite to the outer periphery 7A of the extension portion 7 or a position near the position. Then, as shown in FIG. 9C, the claw portion 24 is locked or inserted into the extension portion 7. Thus, a holding structure is formed for holding the small cover portion 3 in a state where the small opening portion 6 is set as an exposure opening of the space portion 105. FIG. 9C is a cross-sectional view for illustrating an embodiment of the holding structure.

(Size of extension portion) When the extension portion 7 has the function of the receiving portion 25, as shown in FIG10, the extension distance D1 of the extension portion 7 may be smaller than the separation distance D2 between the front end of the small opening portion 6 and the outer periphery 2A of the base 2. FIG10 is a top view for illustrating an embodiment of the extension portion 7. The extension distance D1 of the extension portion 7 represents the longest separation distance from the outer periphery 2A of the cover body 1 to the outer periphery 7A of the extension portion 7 in the direction radially away from the position of the center CT of the cover body 1. In this case, if the front end of the small opening 6 (the front end edge 75 of the small lid 3) is to be formed close to the outer periphery 2A of the lid body 1 and the small opening 6 is to be used as a drinking port, the size of the extension 7 can be reduced, and it can be difficult for the user to recognize the extension 7 as a gripping portion for forming a take-out port. In other words, it can be difficult for the user to use the tear hole formed by pulling up the extension 7 and tearing the lid body 1 as a take-out port for the contents.

In addition, if the blank 30 is a material in which a resin material is attached to the fibers forming the inner part of the fiber sheet, the rigidity of the blank 30 does not become too strong, and when the claw 24 is locked to the extension 7, the extension 7 can be slightly bent, and even if the front end of the claw 24 enters the edge 103 of the container 101, the front end of the claw 24 can slide to the extension 7 in the direction of releasing the locking of the extension 7 and the claw 24. In addition, it is easy to form a holding structure in a state where the front end of the claw 24 is located further outside than the edge 103 of the container 101. If such a holding structure is formed, even if contamination occurs on the edge 103 of the container 101, the contamination will not spread to the claw 24 of the lid body 1, and the hygienic state can be improved.

The structure in which the size of the extension portion 7 is reduced as shown in FIG10 shown in the modification 3 of the second embodiment can also be applied to a cover body using a sheet material having a resin layer formed on the surface of the fiber sheet 31 on at least one of the exposed surface 72 and the opposite surface 73 instead of the cover body 1 having the blank 30. However, if the cover body 1 is the blank 30 and the extension portion 7 is also formed of the blank 30, it is easier to make the surface of the extension portion 7 rougher and easier to make the extension portion 7 slightly buckled than in the case of using a sheet material having a resin layer formed thereon, which is more preferable.

[3  Third Implementation Form] In the cover body 1 of the first implementation form and the second implementation form, a window portion may be formed as shown in FIG. 5A and FIG. 5B. This implementation form is referred to as the third implementation form. FIG. 5A is a top view showing an example of the cover body 1 of the third implementation form. FIG. 5B is a cross-sectional view schematically showing the state of the B-B line longitudinal section of the cover body 1 shown in FIG. 5A.

(Window) The window 40 is a light-transmitting portion that improves visibility from the outside to the space 105 in the container 150 with a lid. The window 40 has a structure in which the opening (opening 41 inside the lid) formed in the corresponding portion 5B of the lid area is covered with a window sheet 42 such as a light-transmitting film. The window sheet 42 is not particularly limited as long as it is a light-transmitting sheet such as a light-transmitting film, and the following films can be exemplified. As the material of the film forming the window sheet 42, synthetic resins, natural resins, etc. can be listed. As synthetic resins and natural resins, there can be cited olefin resins such as polyethylene (PE) and polypropylene (PP), styrene resins such as polystyrene (PS), acrylic resins such as polyacrylate and polymethacrylate, vinyl resins such as polyvinyl chloride (PVC) and polyvinyl acetate, polyamide resins, polyimide resins, polyester resins such as polyethylene terephthalate (PET), fluorine resins, polycarbonate resins (PC), polyether ether ketone (PEEK) and polyether sulfone (PES) and other polyether resins, etc. As the material for forming the film of the window sheet 42, from the viewpoint of reducing the environmental burden, biodegradable resins are preferred. Examples of biodegradable resins include microbial biodegradable resins such as polyhydroxy fatty acid esters (PHA) and PHA copolymers; natural biodegradable resins such as cellulose derivatives such as cellulose acetate and starch-based resins made mainly from starch such as corn starch; lactic acid-based resins such as polylactic acid (PLA), polylactic acid/polycaprolactone copolymers, polylactic acid/polyether copolymers, and polybutylene succinate (P BS), polybutylene succinate-adipate (PBSA), polyethylene terephthalate succinate (PETS) and other succinic acid resins, polycaprolactone, polyvinyl alcohol (PVA) and other chemically synthesized biodegradable resins, as well as polyglycolic acid (PGA), polybutylene terephthalate-adipate, biodegradable polyolefins (product name: Biorecover, CraDrop, etc.).

In addition, when the content of the container is liquid or the like, the window sheet 42 is preferably made of a material having excellent water resistance, oil resistance, etc.

The window sheet 42 provided in the window portion 40 is formed with a portion (bonding portion 46) bonded along the portion of the blank 30 corresponding to the periphery of the lid inner opening portion 41. The method of bonding the window sheet 42 to the portion corresponding to the periphery of the lid inner opening portion 41 is not particularly limited. For example, a hot melt adhesive may be applied between the periphery of the lid inner opening portion 41 and the window sheet 42 to form a coated portion, and the coated portion may be heat-sealed to bond the window sheet 42 to the portion corresponding to the periphery of the lid inner opening portion 41 to form the bonding portion 46. The window portion 40 is provided relative to the cover body 1 of the first embodiment in the example of Fig. 5A, but may be provided relative to the cover body 1 of the second embodiment as shown in Fig. 11A, or relative to the cover body 1 of the fourth embodiment described later as shown in Fig. 11B and Fig. 11C. Fig. 11A and Fig. 11B are top views showing other examples of the cover body 1 of the third embodiment, and Fig. 11C is a cross-sectional view schematically showing the state of the longitudinal cross-section along the line G-G of Fig. 11B.

The structure of the window portion 40 shown in the third embodiment can be applied to a cover body using a sheet having a resin layer formed on the surface of the fiber sheet 31 of at least one of the exposed surface 72 and the opposite surface 73, instead of the cover body 1 having the blank 30. However, if the cover body 1 is the blank 30, when the adhesive portion 46 is formed between the window sheet 42 and the blank 30, even if various resin materials are used as the material for forming the adhesive portion 46 such as hot melt adhesive, it is more preferable in that good adhesion between the window sheet 42 and the blank 30 can be expected.

[4  4th Implementation Form] In the cover body 1 of the 1st to 3rd implementation forms, a protrusion (bulging portion) may be formed as shown in FIG. 6A, FIG. 6B, etc. This implementation form is referred to as the 4th implementation form.

(Protrusion) The protrusion 43 is formed on the exposed surface 72 side of the cover body 1, and is a portion protruding upward (in the +Z direction) based on the outer side of the protrusion 43 (outer than the base end of the protrusion 43) (in the example of Figures 6A and 6B, it is a portion protruding to the +Z direction based on the position of the joint area corresponding part 5A). The protrusion 43 is preferably provided on the inner side relative to the inner edge end of the joint area corresponding part 5A. That is, the protrusion 43 can be formed on the entire cover area corresponding part 5B, or it can be provided on a part of the inner side of the cover area corresponding part 5B.

(Depressed portion) On the opposite side of the exposed surface 72 of the lid body 1 (opposite surface 73 side), a recessed portion 44 is formed in the portion corresponding to the raised portion 43 (opposite portion). In this case, the portion forming the raised portion 43 becomes a convex structure portion in the embossed structure. Thus, in the state of the container 150 with the lid body attached, even if the contents are present at a position higher than the opening 102 of the container 101, the contents will not contact the lid body 1, and the state in which the lid body 1 is installed can be easily maintained. For example, when liquid such as coffee is contained in the container 101 as a content and fresh cream is floated on the surface of the liquid, even if the upper end of the fresh cream is located above the opening 102 of the container 101, the upper end of the fresh cream can be contained in the space in the recessed portion 44, and the risk of the upper end of the fresh cream adhering to the opposite surface 73 of the lid 1 can be suppressed.

When the lid body 1 is formed with a raised portion 43, from the perspective of easily visually recognizing the entire space (recessed portion 44) including the space portion 105 in the container 101, it is preferred that a window portion 40 is formed in an area including the front end portion 43A of the raised portion 43, as shown in Figures 11B and 11C.

In addition, when the cover body 1 is formed with a raised portion 43, as shown in Fig. 6A and Fig. 6B, it is preferred that the outer periphery 3A of the small cover portion 3 and the hinge portion 4 are formed along the base end of the raised portion 43. In this case, when the small cover portion 3 is pulled up with the hinge portion 4 as the axis, the raised portion 43 can be set to a state where the entirety of the raised portion 43 is pulled up.

(Manufacturing method) The cover body 1 of the fourth embodiment can be manufactured, for example, as follows. The impregnation step and the drying step are performed as described in [1-2 Manufacturing method] in the above-mentioned first embodiment. However, in the middle of the drying step or before the drying step (however, after the impregnation step (i.e., between the impregnation step and the drying step)), a shaping process is performed to shape the fiber sheet 31 containing the impregnation liquid. The shaping process can be exemplified by embossing. In the shaping process, a structure corresponding to the raised portion 43 is formed (a structure corresponding to the recessed portion 44 is also formed). After the shaping and drying steps are performed, the blank 30 is formed by performing processing corresponding to the shape of the cover body 1.

In the drying step, the water and non-aqueous solvent contained in the fiber sheet 31 including the impregnation liquid may be almost completely evaporated, or the water and non-aqueous solvent may be slightly left in the fiber sheet. In addition, if the water and non-aqueous solvent slightly remain in the fiber sheet, the shaping treatment may be applied after the drying step. However, from the viewpoint of making the appearance of the protrusion formed by the shaping step good, it is preferable to apply the shaping treatment in the middle of the drying step or before the drying step.

The structure of the raised portion 43 (and the recessed portion 44) shown in the fourth embodiment can be applied to a cover body using a sheet material having a resin layer formed on the surface of the fiber sheet 31 of at least one of the exposed surface 72 and the opposite surface 73, instead of the cover body 1 having the blank 30. However, if the cover body 1 is the blank 30, the manufacturing method of the cover body 1 of the fourth embodiment can be easily applied, which is more preferable in that the raised portion 43 with good appearance can be easily obtained.

In the state of the lid body 1 of the first to fourth embodiments described above, the lid body 1 is joined to the container 101 in the state of the lid body-attached container 150 described later, forming a joint portion 151. The joint portion 151 is a portion where the container 101 and the lid body 1 are bonded (including adhesion) to each other, and in order to separate the lid body 1 and the container 101, the lid body 1 and the container 101 are peeled off at the joint portion 151. The lid body 1 is not limited to this, and the lid body 1 may also be fitted to the container 101 as described below.

[5  Fifth embodiment] [5-1  Structure] The lid 201 of the fifth embodiment has a top cover 202 and a side wall 203 as shown in FIG. 15A and FIG. 15B. The lid 201 of the fifth embodiment is formed to be in contact with a container 101 having an opening 102 formed at the upper end and an edge 103 forming the outer periphery of the opening 102 as described later using FIG. 21. With regard to the state in which the lid 201 is in contact with the container, the lid 201 is formed to be fittable with a container having an opening 102 formed at the upper end and an edge 103 forming the outer periphery of the opening 102 as the upper end edge. FIG. 15A is a perspective view schematically showing an example of a cover of the fifth embodiment. FIG. 15B is a cross-sectional view schematically showing an example of a cover of the fifth embodiment. In addition, FIG. 15B shows the state of the longitudinal section along the N-N line of FIG. 15A. FIG. 21 is a cross-sectional view showing an example of a container 150 with a cover obtained by joining the cover 1 shown in FIG. 15A and FIG. 15B to the container 101. In addition, in FIG. 15A, the N-N line is set to a position that passes roughly directly above the insertion port 219. This is also the same for the J-J line of FIG. 16A, the K-K line of FIG. 17A, and the L-L line of FIG. 18A.

As shown in the example of Fig. 15A and Fig. 15B, the cover body 201 preferably has a curved portion 204. The curved portion 204 is a portion connecting the top cover portion 202 and the side wall portion 203. In the example of Fig. 15A and Fig. 15B, the curved portion 204 is formed continuously (integrally) with the side wall portion 203.

(Top cover) As shown in FIG. 21, when the cover body 201 is mounted (assembled) to the container 101, the top cover 202 becomes the portion that covers the opening 102 of the container 101. The shape of the top cover 202 can be determined according to the shape of the container 101, and examples thereof include a circular shape, an elliptical shape, a triangular shape, a rectangular shape, a polygonal shape, a chamfered shape, etc.

(Bend portion) The bend portion 204 is formed so as to surround the outer periphery of the top cover portion 202, and is a portion forming a boundary between the top cover portion 202 and the side wall portion 203. The bend portion 204 is formed so that when the cover body 201 is attached to the container 101, the side wall portion 203 faces the side wall 104 or the edge portion 103 of the container 101. In the example of FIG. 15A to FIG. 15B, the bend portion 204 has a bending structure, but as described later, the bend portion 204 is not limited to the case of having a bending structure. In addition, "a portion forming the boundary between the top cover 202 and the side wall 203" includes a case where the portion itself becomes the boundary, and a case where the boundary is determined inside or at the end of the portion (a case where a portion of the top cover 202 and/or the side wall 203 also serves as the curved portion 204). The boundary between the top cover 202 and the side wall 203 is determined at the center of the curved portion 204. When the curved portion 204 has a curved structure (for example, FIG. 20A to FIG. 20B showing an example of a modified example 4 of the fourth embodiment described later), the curved portion 204 is composed of a specific portion within the curved range, and the boundary between the top cover portion 202 and the side wall portion 203 is determined by the approximate center of the curved portion 204.

(Side wall portion) The side wall portion 203 is formed in a ring shape along the outer peripheral end of the top cover portion 202.

The cover body 201 of the fifth embodiment can be obtained by integrally molding the blank 250 for forming the cover body 201, thereby integrally forming the top cover portion 202, the bent portion 204, the side wall portion 203 and the top cover portion 202.

(Blank material) In the cover 201 of the fifth embodiment, the blank 250 can be formed in the same manner as the blank 30 shown in the description of the first to fourth embodiments. That is, the blank 250 is formed by a sheet having a fiber sheet 260 and a resin material, wherein the fiber sheet 260 includes fibers formed from a paper-based raw material. The sheet has a structure in which the resin material is attached to at least a portion of the fibers forming the inside of the fiber sheet 260. It can be the same as the resin material described in the first to fourth embodiments. The fiber sheet 260 can be the same as the fiber sheet 31 described in the first to fourth embodiments.

(Contact portion) The cover 201 has a contact portion 274 that contacts the container 101 when it is fitted in the container 101. The contact portion 274 is formed in a predetermined portion of the side wall portion 203 (first contact portion 274A). In addition, as shown in FIG. 15B , the contact portion 274 is preferably formed in a portion corresponding to a predetermined area on the side of the opposite surface 273 in the top cover portion 202 (second contact portion 274B). When the cover 201 is fitted in the container 101, the contact portion 274 is formed to prevent the contents of the container 101 from leaking to the outside. The first contact portion 274A is preferably formed roughly around the entire outer end of the edge 103 of the container, and is preferably formed in a ring shape. The second contact portion 274B is preferably formed roughly around the upper end of the edge 103 of the container, and is preferably formed in a ring shape. The first contact portion 274A and the second contact portion 274B can be separated from each other or connected. The contact portion 274 (including the first contact portion 274A and the second contact portion 274B) shown in the fifth embodiment is also the same for the sixth embodiment, the seventh embodiment, and the eighth embodiment (the sixth embodiment to the eighth embodiment) described later.

In addition, in the examples of FIG. 15A and FIG. 15B, a through portion 210 is formed at a predetermined position of the top cover portion 202. An insertion port 219 is formed as the through portion 210. The through portion 210 is formed by the cut-in portion 208. The cut-in portion 208 is a cross cut in the example of FIG. 15. The insertion port 219 and the through portion 210 can be formed in the same manner as the insertion port 19 and the through portion 10 described in the first embodiment. The through portion 210 is a portion that penetrates the top cover portion 202 from the exposed surface 272 to the opposite surface 273. In the area forming the peripheral surface of the through-portion 210 (the same area as the peripheral surface 11 described in the first embodiment), the cross section of the fiber sheet 260 is exposed, as described in the first embodiment. In addition, at least a portion of the resin material is exposed in at least a portion of the cross section of the fiber sheet 260 exposed in the peripheral surface of the through-portion 210. The exposure of the cross section of the fiber sheet 260 and the exposure of the resin material shown in the fifth embodiment are also the same for the sixth to eighth embodiments described later.

[5-2  Function and Effect] When a blank for forming a lid having a curved portion (a lid having a side wall portion, a curved portion, and a top cover portion) is formed from a paper-based material and the blank is formed into the shape of the lid (three-dimensional shape), a large number of fine wrinkles and folds are generated near the curved portion and on the side wall portion. If the blank is formed only from a paper-based material, there is a situation in which a restoring force acts on the fibers constituting the lid after the forming, and such fine wrinkles and folds are also affected by the force applied to the lid when the lid is handled or when the lid is attached to a container, and the shape is restored. In this regard, according to the cover 201 of the fifth embodiment, it is possible to suppress the risk of the shape being restored after the shape is deformed (shaped) when the blank 250 is integrally formed.

[5-3  Variations] (Variation 1 of the fifth embodiment) In the cover body 201 of the fifth embodiment, as shown in FIG. 18A, FIG. 18B, etc., the top cover 202 and the side wall 203 may also be formed by separate parts (Variation 1 of the fifth embodiment). Variation 1 of the fifth embodiment includes a case where a part of the part forming the top cover 202 forms a part of the side wall 203, and a case where a part of the part forming the side wall 203 forms a part of the top cover 202. FIG. 18A and FIG. 18B show an example of a case where a part of the part forming the top cover 202 forms a part of the side wall 203.

Regarding the cover body 201 of the modification 1 of the fifth embodiment shown in FIG. 18A and FIG. 18B, for example, a top cover forming member 222 having a first portion 231 for forming the top cover 202 and a side wall forming member 223 for forming the side wall 203 is provided. A joint margin portion 230 configured to be joined to the side wall forming member 223 is extended from the outer end portion (outer edge end portion) of the first portion 231 of the top cover forming member 222 as a second portion 232. By bonding the joint margin 230 of the top cover forming member 222 to the upper end of the side wall forming member 223, the top cover forming member 222 and the side wall forming member 223 are joined to form the curved portion 204. At this time, the cover body 201 is formed. In this case, as shown in FIG. 19A and FIG. 19B, etc., blanks (referred to as the first blank 251 and the second blank 252, respectively) for forming the top cover forming member 222 and the side wall forming member 223 can be used as blanks. The first blank 251 for forming the top cover forming member 222 can be a sheet formed in a shape that matches the shape of the joint margin 230 with the shape of the top cover 202. The second blank 252 is formed into a shape corresponding to the shape of the side wall portion 203. For example, when the side wall portion 203 is a shape that decreases or expands toward the front end, a sheet formed into a fan shape (formed into a partial fan shape) can be used. The end edges 253, 253 at both ends of the second blank 252 can be joined to obtain the side wall portion forming member 223 that forms the side wall portion 203.

In the modification 1 of the fifth embodiment, at least one blank selected from the group consisting of the first blank 251 and the second blank 252 can be formed in the same manner as the above-mentioned blank 30. That is, at least one blank selected from the group consisting of the first blank 251 and the second blank 252 has a fiber sheet 260 containing fibers formed from a paper-based raw material. Moreover, a resin material is attached to at least a portion of the fibers forming the inside of the fiber sheet. In the examples of FIG. 18A, FIG. 18B, FIG. 19A, and FIG. 19B, the first blank and the second blank have a fiber sheet 260 containing fibers formed from a paper-based raw material.

(Variation 2 of the fifth embodiment) In the example of FIG. 15A and FIG. 15B, although the side wall portion 203 is formed in a manner that the front end tapers toward the lower side (toward the -Z direction) (the inner diameter of the cross section decreases (contracts)), this is a preferred example, and the side wall portion 203 may be formed in a manner that the front end thickens toward the lower side (the inner diameter of the cross section increases (expands)). In addition, the side wall portion 203 may be formed in a manner that the front end neither tapers nor thickens toward the lower side (the inner diameter of the cross section is constant), and the side wall portion 203 may be formed in a manner that has a portion that tapers and thickens toward the lower side (a portion where the inner diameter of the cross section changes) (Variation 2 of the fifth embodiment). The contents shown in the second variation of the fifth embodiment are also the same for the sixth to eighth embodiments described later. In addition, the cross section represents a cross-section of the side wall portion observed when the side wall portion is cut by a plane with the vertical direction as the normal. The cross-section inner diameter represents the diameter of the inner peripheral surface when the cross-section (cross-section) is roughly annular.

(Variant 3 of the fifth embodiment) The top cover 202 of the cover body 201 of the fifth embodiment may also be configured as described in the second to fourth embodiments (Variant 3 of the fifth embodiment). Therefore, in Variant 3 of the fifth embodiment, the top cover 202 may have a structure corresponding to the opening forming portion 20 (corresponding to the second embodiment), a structure corresponding to the window portion 40 (corresponding to the third embodiment), a structure corresponding to the raised portion 43 (corresponding to the fourth embodiment), and a combination of these structures. In addition, it is not prohibited to provide a structure corresponding to the variants shown in the first and second embodiments in the cover body 201 of the fifth embodiment. The contents shown in the third variation of the fifth embodiment are also the same for the sixth to eighth embodiments described later. In the cover 201 of the third variation of the fifth embodiment, the structure of the insertion port 219 can also be omitted.

(Variation 4 of the fifth embodiment) In the cover 201 of the eighth embodiment, as shown in FIGS. 20A and 20B , the curved portion 204 may be formed by the extension 226. In addition, a convex portion 225 may be formed at the end (outer end 228B) closer to the side wall 203 among the ends (inner end 228A, outer end 228B) of the extension 226 or in the vicinity thereof.

(Extended portion) In an example of the cover 201 of the modified example of the 8th embodiment shown in FIGS. 20A to 20B , an extended portion 226 is formed as a structure (extended structure) in which a predetermined area on the outer peripheral end side of the top cover 202 protrudes in an oblique upward direction, but the extended direction of the extended portion 226 may be an upward direction or a horizontal direction (a plane direction of the top cover 202). In addition, the inner surface 226A side of the extended portion 226 becomes a sunken portion (sunken portion 227). The shape of the sunken portion 227 is a shape corresponding to the shape of the extended portion 26. This can be achieved according to the shape of the mold when the cover 201 is formed from the blank 250. The size of the sunken portion 227 is preferably a size that can fit the edge 103 of the container 101. If the size of the sunken portion 227 is such a size, when the lid 201 is used as a container 150 with a lid, the edge 103 roughly enters the sunken portion 227, and the outer end portion of the edge 103 (in the example of FIG. 20 , the outer peripheral surface 111 of the edge 103) can be in contact with the sunken portion 227 surface, making it easy to securely install the lid 201 using the edge 103 of the container 101.

(Convex portion) As shown in the examples of FIG. 20A to FIG. 20B , a convex portion 225 may be formed on the side wall portion 203. The convex portion 225 is determined as, for example, a portion protruding in the inward direction (center CT direction, direction from the outer peripheral surface 203B of the side wall portion 203 toward the inner peripheral surface 203A) at a predetermined position of the side wall portion 203. The convex portion 225 is preferably a convex strip portion formed in a strip shape in a manner surrounding the inner peripheral surface of the side wall portion 203. A convex structure having the convex portion 225 may be formed on the inner peripheral surface side of the side wall portion 203, and a concave portion 224 may be formed on the outer peripheral surface 203B side of the side wall portion 203 at a position corresponding to the formation position of the convex structure. By forming such a structure, the shape of the side wall portion 203 can be made more stable.

[6  6th Implementation Form] [6-1  Structure] As shown in FIG. 16A and FIG. 16B, the cover body 201 of the 6th implementation form is the same as the 5th implementation form in that it has a top cover portion 202 and a side wall portion 203 and can be fitted into a container. The cover body 201A of the 6th implementation form has a structure in which a part of the side wall portion 203 extends toward the upper side and the lower side of the top cover portion 202. The side wall portion 203 has an annular (including cylindrical) shape and has an upper wall 205 and a lower wall 206. The lower wall 206 is a portion extending toward the lower side of the top cover portion 202, and the upper wall 205 is composed of a portion of the side wall portion 203 other than the lower wall 206. In the example of FIG. 16A and FIG. 16B , the side wall portion 203 is formed in a manner that the front end tapers toward the lower side. In addition, although the through portion 210 is formed at a predetermined position of the top cover portion 202 in the example of FIG. 16A and FIG. 16B , this is only an example.

(Components forming the top cover and the side wall, respectively) In the sixth embodiment, as shown in the first variation of the fifth embodiment, the top cover 202 and the side wall 203 are formed by separate components. In the example of FIG. 16A and FIG. 16B, the cover body 201 has a top cover forming member 222 and a side wall forming member 223 as the above-mentioned separate components, and has a joint portion for joining the top cover forming member 222 and the side wall forming member 223.

(Top cover forming member) The top cover forming member 222 has a first portion (first portion 231 of the top cover forming member 222) corresponding to the top cover 202, and a second portion (second portion 232 of the top cover forming member 222) extending from the outer peripheral end of the first portion 231, and the second portion 232 becomes the joint margin portion 230 shown in the first modification of the fifth embodiment. In the example of FIG. 16A, the second portion 232 of the top cover forming member 222 becomes a portion (standing portion) that stands up from the outer peripheral end of the first portion 231 in the obliquely upward direction or the straight upward direction in the state of the cover body 201, and when the second portion 232 is joined to the side wall forming member 223, the second portion 232 becomes a part of the side wall 203.

(Side wall forming member) The side wall forming member 223 is formed in an annular shape (including a cylindrical shape) and has a portion (upper forming portion) forming the upper wall 205 and a portion (lower forming portion) forming the lower wall 206. The upper forming portion has a portion (first contact wall portion 233) that contacts at least on the outer surface side with the joint margin portion 230 of the second portion 232 that becomes the top cover forming member 222.

In the example of Fig. 16A and Fig. 16B, the upper wall 205 (upper forming portion) has a first contact wall portion 233, a portion (second contact wall portion 234) that contacts the joint margin portion 230 of the second portion 232 that becomes the top cover forming member 222 on the inner surface side, and a continuous portion 235 that connects the first contact wall portion 233 and the second contact wall portion 234, and the continuous portion 235 covers the upper end surface of the joint margin portion 230 of the second portion that becomes the top cover forming member 222. The lower end of the second contact wall portion 234 is located on the upper surface side of the first portion 231 of the top cover forming member 222, and in the example of Fig. 16A and Fig. 16B, it is slightly separated from the first portion 231. However, this is just an example, and the lower end of the second contact wall portion 234 may also be in contact with the upper surface side of the first portion 231 of the top cover forming member 222 .

In the example of Fig. 16A and Fig. 16B, the lower wall 206 (lower forming portion) is a portion extending downward (in Fig. 16A and Fig. 16B, obliquely downward) with the lower end of the first contact wall portion 233 as the base end. The lower wall 206 (lower forming portion) is preferably located on the lower side of the lower surface of the first portion 231 of the top cover portion forming member 222 with respect to the position in the up-down direction.

(Blank material) The cover body 201 of the sixth embodiment can be formed by processing a blank material. As the blank material, a blank material for forming the top cover forming member 222 and the side wall forming member 223 (referred to as the first blank material and the second blank material, respectively, as described in the first variation of the fifth embodiment) can be used. At least one blank material selected from the group consisting of the first blank material and the second blank material can be formed in the same manner as the blank material 30 described in the first variation of the fifth embodiment.

The first blank for forming the top cover forming member 222 may be the same blank as the first blank 251 described in the first modification of the fifth embodiment, or may be a sheet formed into a shape that further matches the shape of the joint margin 230 with the top cover 202. The top cover forming member 222 is preferably formed by bending the first blank to form the first portion 231 and the rising portion (the second portion 232 that becomes the joint margin) corresponding to the top cover 202. That is, the second portion 232 is preferably formed by bending the first blank upward at the peripheral position of the first portion 231 (the base end of the joint margin 230).

The second blank may be the same blank as the second blank 252 described in the first modification of the fifth embodiment, or may be a sheet formed in a fan shape. By folding the upper end side portion of the annular body formed by joining the end edge of the second blank inward at a position corresponding to the continuous portion 235, the first contact wall portion 233, the second contact wall portion 234 and the continuous portion 235 can be formed, and the upper forming portion (the structural portion corresponding to the upper wall 205) and the lower forming portion (the structural portion corresponding to the lower wall 206) can be formed. The side wall forming member 223 is formed by forming the upper forming portion and the lower forming portion. In addition, at least the first contact wall portion 233 and the second contact wall portion 234 are bonded to the joint margin portion 230. In the example of FIG. 16B , the first contact wall portion 233 , the second contact wall portion 234 , and the continuous portion 235 are bonded to the bonding margin portion 230 to form a bonding portion.

In addition, when manufacturing the cover body 201, it is preferable to use the above-mentioned annular body formed from the second blank. The lower end of the joint margin portion 230 (the second portion 232) of the top cover forming member 222 is aligned with the boundary position of the lower forming portion and the upper forming portion in the inner peripheral surface of the annular body (the boundary position of the upper wall 2505 and the lower wall 206), so that the joint margin portion 230 faces the inner peripheral surface of the annular body. And, by folding back the part of the upper end side of the annular body inward at the position corresponding to the continuous portion 235 in the annular body as described above, the joint margin portion 230 is covered from the upper end side. Then, the joining margin portion 230 is joined to the annular body that becomes the side wall portion forming member 223 in a manner sandwiched between the first contact wall portion 233 and the second contact wall portion 234. Thus, the side wall portion forming member 223 is formed and the cover body 201 is obtained.

[6-2  Function and Effect] According to the cover body 201 of the sixth embodiment, similarly to the fifth embodiment, the risk of the shape being restored after the shape deformation (shaping) when the cover body 201 is obtained by manufacturing the top cover forming member 222 and the side wall forming member 223 from the blank (the first blank, the second blank) can be suppressed.

[7  Seventh Implementation Form] [7-1  Structure] As shown in FIG. 17A and FIG. 17B, the cover body 201 of the seventh implementation form is the same as the fifth implementation form in that it has a top cover portion 202 and a side wall portion 203 and can be fitted into a container. The cover body 201 of the seventh implementation form has a structure in which a portion of the side wall portion 203 extends toward the upper side and the lower side of the top cover portion 202. The side wall portion 203 has an annular (including cylindrical) shape and has an upper wall 205 and a lower wall 206. The lower wall 206 is a portion extending toward the lower side of the top cover portion 202, and the upper wall 205 is composed of a portion of the side wall portion 203 other than the lower wall 206. In the example of FIG. 17A and FIG. 17B , the side wall portion 203 is formed in a manner that the front end tapers toward the lower side. In addition, although the through portion 210 is formed at a predetermined position of the top cover portion 202 in the example of FIG. 17A and FIG. 17B , this is only an example.

(Components forming the top cover and the side wall, respectively) In the seventh embodiment, as shown in the first variation of the fifth embodiment and the sixth embodiment, the top cover 202 and the side wall 203 are formed by separate components. In the example of FIG. 17A and FIG. 17B, the cover body 201 has a top cover forming member 222 and a side wall forming member 223 as the above-mentioned separate components, and has a joint portion for joining the top cover forming member 222 and the side wall forming member 223.

(Top cover forming member) The top cover forming member 222 has a first portion (first portion 231 of the top cover forming member 222) corresponding to the top cover 202 and a second portion (second portion 232 of the top cover forming member 222) extending from the outer peripheral end of the first portion 231, and the second portion 232 becomes the joint margin portion 230 shown in the first modification of the fifth embodiment. In the example of FIG. 16A, the second portion of the top cover forming member 222 becomes a portion (hanging portion) extending from the outer peripheral end of the first portion 231 in an obliquely downward direction or a straight downward direction, and when the second portion 232 is joined to the side wall forming member 223, the second portion 232 becomes a portion of the side wall 203.

(Side wall forming member) The side wall forming member 223 is formed in an annular shape (including a cylindrical shape) and has a portion (upper forming portion) forming the upper wall 205 and a portion (lower forming portion) forming the lower wall 206. The lower forming portion has a portion (lower first contact wall portion 237) that contacts the joint margin portion 230 of the second portion 232 that becomes the top cover forming member 222 at least on the outer surface side.

In the example of Figures 17A and 17B, the lower forming portion has a lower first contact wall portion 237, a portion (lower second contact wall portion 238) that contacts the inner surface side of the joining margin portion 230 of the second portion 232 that becomes the top cover forming component 222, and a lower end side connecting portion 239 that connects the lower first contact wall portion 237 and the lower second contact wall portion 238, and the lower end side connecting portion 239 covers the lower end surface of the joining margin portion 230 of the second portion 232 that becomes the top cover forming component 222. The upper end of the lower second contact wall portion 238 is located on the lower surface (opposite surface 273) side of the first portion 231 of the top cover forming member 222, and in the example of Figures 17A and 17B, it is preferably separated from the first portion 231. It is preferred that the edge 103 of the container 101 (for example, a portion of the outer peripheral surface of the curled portion) can enter between the first portion and the upper end of the lower second contact wall portion 238.

In the example of FIG. 17A and FIG. 17B , the upper wall 205 (upper forming portion) is a portion extending upward (in FIG. 17B , obliquely upward) with the upper end of the lower first contact wall portion 237 as the base end. The upper wall 205 (upper forming portion) is preferably located, for example, on the upper side of the upper surface of the first portion 231 of the top cover forming member 222 in terms of the vertical direction. As shown in the example of FIG. 17A and FIG. 17B , the upper forming portion preferably has a curled portion (side wall upper end curled portion 236) formed on its upper end side. In this case, the end surface of the blank (the second blank for forming the side wall forming member 223) formed at the upper end of the upper forming portion can be prevented from being exposed, and even when the user puts his mouth to the end surface of the blank to suck the contents in the container 101, the discomfort caused by the user's mouth contacting the end surface of the blank can be suppressed. In addition, by forming the side wall upper end curled portion 236, it is difficult for liquid to contact the portion of the side wall portion 203 corresponding to the end surface of the blank.

(Blank material) The cover body 201 of the seventh embodiment can be formed by processing a blank material. As the blank material, a blank material for forming the top cover forming member 222 and the side wall forming member 223 (referred to as the first blank material and the second blank material, respectively, as described in the first variation of the fifth embodiment) can be used. At least one blank material selected from the group consisting of the first blank material and the second blank material can be formed in the same manner as the blank material 30 described in the first variation of the fifth embodiment.

The first blank for forming the roof-cover forming member 222 may be the same blank as the first blank 251 described in the first modification of the fifth embodiment, or may be a sheet formed in a shape such that the joining margin 230 further matches the shape of the roof-cover 202. The roof-cover forming member 222 is preferably formed by bending the first blank to form a first portion 231 corresponding to the roof-cover 202 and a second portion 232 serving as the joining margin 230. That is, the second portion 232 is preferably formed by bending the first blank downward at the periphery of the first portion 231.

The second blank may be the same blank as the second blank 252 described in the first modification of the fifth embodiment, or may be a sheet formed in a fan shape. By joining the end edge of the second blank to form an annular body, the lower end side portion of the annular body is folded back inward at a position corresponding to the lower end side continuous portion 239, thereby forming the lower first contact wall portion 237, the lower second contact wall portion 238 and the lower end side continuous portion 239, and forming the lower forming portion (lower wall 206), and further forming the upper forming portion (upper wall 205). By forming the lower forming portion and the upper forming portion, the side wall forming member 223 is formed.

Furthermore, when manufacturing the cover body 201, it is preferable to use the above-mentioned annular body formed from the second blank. The upper end of the joint margin portion 230 (the second portion 232) of the top cover forming member 222 is aligned with the boundary position of the lower forming portion and the upper forming portion (the boundary position of the upper wall 205 and the lower wall 206) in the inner peripheral surface of the annular body, and the joint margin portion 230 is made to face the inner peripheral surface of the annular body. In addition, by folding back the lower end side portion of the annular body inward at the position corresponding to the lower end side continuous portion 239 in the annular body as described above, the joint margin portion 230 is covered from the lower end side. Furthermore, the bonding margin portion 230 is bonded (adhered) to the lower forming portion (annular body forming the side wall forming member 223) in a manner of being sandwiched between the lower first contact wall portion 237 and the lower second contact wall portion 238. Thus, the side wall forming member 223 is formed and the cover body 201 is obtained.

[7-2 Function and Effect] According to the cover body 201 of the seventh embodiment, similarly to the fifth embodiment, the risk of the shape being restored after the shape deformation (shaping) when the cover body 201 is obtained by manufacturing the top cover forming member 222 and the side wall forming member 223 from the blank (the first blank, the second blank) can be suppressed.

[5  Applicable Examples] (First Example) The lid 1 of the first embodiment can be used in a container 150 with a lid, as shown in, for example, FIG. 14A and FIG. 14B. FIG. 14A is a perspective view showing an embodiment in which the lid 1 of the first embodiment is joined to an edge 103 forming the outer periphery of the opening 102 of a container 101 having an opening 102 formed at the upper end, so that the container 101 and the lid 1 are brought into contact (the edge 103 is brought into contact with a portion of the opposite surface). FIG. 14B is a cross-sectional view schematically showing the state of the longitudinal section taken along line I-I of FIG. 14A. The container 150 with a lid will be described further using FIG. 14A and FIG. 14B.

(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 101 is not particularly limited, and a joining method such as a crimping method, a heat fusion 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.

In the example shown in FIG. 14A and FIG. 14B , the container 101 has: a container body 110 having a cylindrical side wall 104 and a bottom 107 whose diameter increases toward the upper direction (and whose front end decreases toward the lower direction), and a space 105 formed inside; and an opening 102 which 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 the structure of the container 101 is not limited. For example, the container 101 may also have the opening 102 formed in a rectangular shape. The container 101 may be any container as long as the opening 102 can be covered by the lid 1. In addition, the articles accommodated in the interior (space 105) of the container 101 are not particularly limited, and examples thereof include liquid articles, solid articles, and a combination thereof.

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

In addition, the cover body 1 of the first embodiment may be provided in combination with a container 101 having an opening 102 .

(Second example) The lid 1 of the fifth embodiment can be used for a container 350 with a lid, for example, as shown in FIG21. FIG21 is a cross-sectional view showing an embodiment in which the lid 1 of the fifth embodiment is fitted into the edge 103 forming the outer periphery of the opening 102 of the container 101 having the opening 102 formed at the upper end, so that the container 101 and the lid 1 are in contact (the edge 103 is in contact with part of the top cover 202).

The container 350 with a lid can be obtained by fitting the lid 201 into the edge 103 so as to cover the opening 102 of the container 101 .

In addition, the cover body 1 of the fifth embodiment may be provided in combination with a container 101 having an opening 102 .

The contents shown in (Example 1) of the above-mentioned [5 Applicable Examples] are not limited to the case of using the lid 1 of the first embodiment. For the second to fourth embodiments, the lid 1 of the first embodiment can also be used for a container 150 (not shown) with a lid body joined to the container 101.

The contents shown in (Example 2) of the above-mentioned [5 applicable examples] are not limited to the case of using the lid 1 of the fifth embodiment. For the sixth to eighth embodiments, the lid 201 of the fifth embodiment can also be used for a container 350 (not shown) with a lid attached that is joined to the container 101.

As described so far, the cover 1, 201, etc. of the present invention can be applied to such various forms of cover 1, 201, etc. In addition, it can also be applied to the cover 1, 201, etc. of forms other than those described above. The cover of the present invention is described in detail above, but the above content is only an example of the cover of the present invention and is not limited to this. Therefore, it can also be appropriately changed within the scope of the main purpose of the present invention. In addition, the structure of the cover mentioned above can use the structure of the cover of each example independently, and can also be applied by appropriately combining the structure of the cover of each example.

Based on the above description of this specification, the present invention can adopt the structures shown in the following [E1] to [E22].

[E1] A lid body formed to be in contact with a container having an edge and formed from a blank, the blank having a fiber sheet including fibers formed from a paper-based material, and a resin material being attached to the fibers forming at least a portion of the interior of the fiber sheet. [E2] The lid body as described in [E1] above, having a joint region corresponding portion corresponding to a region joined to the container along the edge of the container, and a lid region corresponding portion consisting of a portion located on the inner side relative to the joint region corresponding portion, and at least in a portion corresponding to the joint region corresponding portion, the resin material is attached to the fibers forming at least a portion of the interior of the fiber sheet. [E3] The lid as described in [E1] or [E2] above, which has a through portion cut from one side of the blank to the other side, the cross section of the fiber sheet is exposed at the peripheral surface of the through portion, and the resin material is exposed at least in a portion of the cross section. [E4] The lid as described in [E3] above, which has an inclined portion, the peripheral surface of the through portion being set as an end, and the inclined portion is inclined upward in a direction away from the end. [E5] The lid as described in [E3] or [E4] above, wherein the density of the fibers constituting the fiber sheet in the inclined portion is higher as the position is closer to the end of the inclined portion. [E6] A cover as described in any one of "the above [E3] to [E5]" subordinate to the above [E2], wherein a fragile portion is provided in the above cover area corresponding portion to guide the cut-off position in the above cover area corresponding portion, and the above fragile portion has a plurality of the above through portions and at least one continuous portion formed between at least two of the above through portions. [E7] A cover as described in the above [E7], wherein the above continuous portion has a half-cut structure. [E8] A cover as described in the above [E6] or [E7], wherein the above fragile portion has a plurality of the above through portions formed in a radial shape around the above continuous portion. [E9] A lid as described in any one of "the above [E3] to [E8]" subordinate to the above [E2], wherein the lid region corresponding portion comprises: a base having a small opening portion, the small opening portion having an opening area smaller than the opening portion surrounded by the above edge of the above container; a small lid portion, which opens and closes the above small opening portion; and a hinge portion, which connects the above base and the above small lid portion; the above small lid portion is configured to be rotatable relative to the above base portion with the above hinge portion as an axis; at least a portion of the above through portion is formed at a boundary position between the outer periphery of the above small lid portion and the above opening edge of the above small opening portion. [E10] A lid as described in the above [E9], wherein a grip portion is provided on the upper surface side of the above small lid portion. [E11] The lid as described in [E10] above, wherein the gripping portion has a pull-tab member, and the pull-tab member is joined to the upper surface side of the small lid. [E12] The lid as described in any one of [E9] to [E11] above, which has a retaining structure that retains the small lid in a state where the small lid is rotated relative to the base with the hinge as an axis to open the small opening. [E13] The lid as described in any one of [E9] to [E12] above, wherein an extension portion is formed on the outer periphery of the base, and the base and the extension portion are formed integrally from the blank. [E14] The lid as described in [E13] above, wherein the hinge portion is formed between the extension portion and the front end of the small lid. [E15] The lid as described in [E9] above, which has a retaining structure, the retaining structure retaining the small lid in a state where the small lid is rotated relative to the base with the hinge as the axis to open the small opening; a gripping portion is provided on the upper surface side of the small lid; a claw portion is provided on the gripping portion; an extension portion is formed on the outer periphery of the base; the extension portion and the receiving portion form the retaining structure. [E16] The lid as described in any one of [E1] to [E15] above, wherein a bulge is formed. [E17] The lid as described in any one of [E1] to [E16] above, wherein the lid has a window portion. [E18] A lid as described in any one of [E1] to [E17], wherein at least a portion of the resin material is impregnated between at least a portion of the fibers. [E19] A lid as described in any one of [E1] to [E18], wherein the lid is formed to be joinable and/or fitable to a container having an edge. [E20] A container with a lid, comprising the lid as described in any one of [E1] to [E19], and the container having the edge, wherein the lid is joined to the container. [E21] A combination of a lid and a container, comprising the lid as described in any one of [E1] to [E19], and the container having the edge. [E22] A method for manufacturing a cover, comprising: an impregnation step of impregnating a fiber sheet in an impregnation liquid containing a resin material; and a drying step of drying the fiber sheet containing the impregnation liquid. [E23] A method for manufacturing a cover as described in [E22] above, wherein a shaping treatment of shaping the fiber sheet containing the impregnation liquid is performed in the middle of the drying step or before the drying step.

1: Lid body 2: Base 2A: Outer periphery 3: Small lid part 3A: Outer periphery 4: Hub part 5A: Joint area corresponding part 5B: Lid area corresponding part 5C: Lid area non-formed part 6: Small opening part 6A: Opening edge 7: Extension part 7A: Outer periphery 8: Cut-in part 10: Through part 11: Peripheral part 12: End part 13: Inclined part 13A: End part 14: Fragile part 15: Continuous part 16: Half-cut part 17: Connection structure 19: Insertion port 20: Opening forming part 21: Gripping part 22: Pull-tab member 22A: One end part 22B: other end 23: pull tab joint 24: claw 25: receiving portion 26: extension portion 30: blank 31: fiber sheet 31A: fiber 32: resin material 40: window 41: lid inner opening 42: window sheet 43: raised portion 43A: front end 44: recessed portion 46: bonding portion 50: outer periphery 72: exposed surface 73: opposite surface 74: base end 75: front edge 101: container 102: opening 103: edge 104: side wall 105: space 107: bottom 108: curled portion 110: container body 111: Outer peripheral surface 150: Container with lid 151: Joint 201: Lid 202: Top cover 203: Side wall 203A: Inner peripheral surface 203B: Outer peripheral surface 204: Bend 205: Upper wall 206: Lower wall 208: Cut-in portion 210: Through-through portion 219: Insertion port 222: Top cover forming member 223: Side wall forming member 224: Concave portion 225: Convex portion 226: Extending portion 226A: Inner surface 227: Sunk portion 228A: Inner end portion 228B: Outer end portion 230: Joint margin portion 231: Part 1 232: Part 2 233: First contact wall 234: Second contact wall 235: Continuous part 236: Curled part at the upper end of the side wall 237: First contact wall at the lower part 238: Second contact wall at the lower part 239: Continuous part at the lower end side 250: Blank 251: First blank 252: Second blank 253: Edge 260: Fiber sheet 272: Exposed surface 273: Opposite surface 274: Contact part 274A: First contact part 274B: Second contact part 350: Container with lid 2505: Upper wall CT: Center D1: Extension distance D2: Separation distance F1: Arrow mark P1: Position P2: Position R: Joint area

[Fig. 1] Fig. 1A is a top view of an embodiment of a cover body of the first embodiment. Fig. 1B is a cross-sectional view schematically showing the state of the longitudinal section along the A-A line of Fig. 1A. Fig. 1C is a cross-sectional view showing a portion of the peripheral surface of the through-portion. [Fig. 2] Fig. 2A and Fig. 2B are cross-sectional views of an embodiment of an inclined portion of a cover body of the first embodiment. [Fig. 3] Fig. 3A is a top view of an embodiment of a cover body of a modification 1 of the first embodiment. Fig. 3B is a top view of an embodiment of a cover body of a modification 2 of the first embodiment. [Fig. 4] Fig. 4A and Fig. 4B are top views of another embodiment of a cover body of the first embodiment. [Fig. 5] Fig. 5A is a top view of an embodiment of a cover body of the third embodiment. Fig. 5B is a cross-sectional view schematically showing the state of the B-B line longitudinal section of Fig. 5A. [Fig. 6] Fig. 6A is a top view of an embodiment of a cover body of the fourth embodiment. Fig. 6B is a cross-sectional view schematically showing the state of the C-C line longitudinal section of Fig. 6A. [Fig. 7] Fig. 7A is a top view of an embodiment of a cover body of the second embodiment. Fig. 7B is a cross-sectional view schematically showing the state of the D-D line longitudinal section of Fig. 7A. [Fig. 8] Fig. 8A is a top view of an embodiment of a cover body of a modification 1 of the second embodiment. Fig. 8B is a cross-sectional view schematically showing the state of the E-E line longitudinal section of Fig. 8A. [Figure 9] Figure 9A is a top view of an embodiment of a cover body of a modification 3 of the second embodiment. Figure 9B is a cross-sectional view schematically showing the state of the F-F line longitudinal section of Figure 9A. Figure 9C is a cross-sectional view schematically showing an embodiment of a retaining structure. [Figure 10] is a top view of another embodiment of a cover body of a modification 3 of the second embodiment. [Figure 11] Figures 11A and 11B are top views of another embodiment of a cover body of the third embodiment. Figure 11C is a cross-sectional view schematically showing the state of the G-G line longitudinal section of Figure 11B. [Figure 12] Figure 12A is a top view of an embodiment of a connection structure of a cover body of the third embodiment. Figure 12B is a cross-sectional view schematically showing a half-cut portion. [Fig. 13] Fig. 13A is a top view of an embodiment of a cover body of a modification 2 of the second embodiment. Fig. 13B is a cross-sectional view schematically showing the state of the H-H line longitudinal section of Fig. 13A. [Fig. 14] Fig. 14A is a top view of an embodiment of a container with a cover body. Fig. 14B is a cross-sectional view schematically showing the state of the I-I line longitudinal section of Fig. 14A. [Fig. 15] Fig. 15A is a three-dimensional view of an embodiment of a cover body of the fifth embodiment. Fig. 15B is a cross-sectional view schematically showing the state of the N-N line longitudinal section of Fig. 15A. [Fig. 16] Fig. 16A is a three-dimensional view of an embodiment of a cover body of the sixth embodiment. FIG. 16B is a cross-sectional view schematically showing the state of the J-J line longitudinal section of FIG. 16A. [FIG. 17] FIG. 17A is a perspective view showing an embodiment of the cover of the seventh embodiment. FIG. 17B is a cross-sectional view schematically showing the state of the K-K line longitudinal section of FIG. 17A. [FIG. 18] FIG. 18A is a top view showing an embodiment of the cover of the modification 1 of the fifth embodiment. FIG. 18B is a cross-sectional view schematically showing the state of the L-L line longitudinal section of FIG. 18A8. [FIG. 19] FIG. 19A and FIG. 19B are top views showing an embodiment of the blank of the cover of the modification 1 of the fifth embodiment. [Fig. 20] Fig. 20A is a top view showing an embodiment of a lid body of variation 4 of the fifth embodiment. Fig. 20B is a cross-sectional view schematically showing the state of the longitudinal section along the M-M line of Fig. 20A. [Fig. 21] is a cross-sectional view showing an embodiment of a container with a lid body.

1: Cover

5A: Corresponding part of the joint area

5B: Covering area corresponding part

5C: Non-formed part of the cover area

8: Cut-in section

10: Communications Department

11: Face

12: End

13: Inclined part

13A: End

19: Insertion port

30: Blank

31: Fiber sheets

31A: Fiber

32: Resin material

50: Periphery

72: Reveal your face

73: Opposite each other

CT: Center

P1: Location

P2: Location

R:Joint area

Claims (21)

A lid, wherein: the lid is formed to be in contact with a container having an edge and is formed from a blank; the blank has a fiber sheet including fibers formed from a paper-based material; a resin material is attached to the fibers forming at least a portion of the interior of the fiber sheet. The lid body as described in claim 1 has: a joint area corresponding portion corresponding to the area joined to the container along the edge of the container; and a lid area corresponding portion formed by a portion on the inner side relative to the joint area corresponding portion; at least in the portion corresponding to the joint area corresponding portion, the resin material is attached to the fibers forming at least a portion of the interior of the fiber sheet. The cover as described in claim 2 has a through portion cut from one side of the blank to the other side; The cross section of the fiber sheet is exposed at the peripheral surface of the through portion, and the resin material is exposed at least in a portion of the cross section. The cover body as described in claim 3 has an inclined portion, which sets the aforementioned peripheral surface portion of the aforementioned through-portion as an end portion and inclines upward in a direction away from the aforementioned end portion. The cover as described in claim 4, wherein, the closer to the end of the inclined portion, the higher the density of the fibers constituting the fiber sheet in the inclined portion. The cover body as described in claim 3, wherein: A fragile portion is provided in the cover area corresponding portion for guiding the cut-off position in the cover area corresponding portion; The fragile portion has a plurality of the through portions and at least one continuous portion formed between at least two of the through portions. The cover as described in claim 6, wherein the aforementioned continuous portion has a half-cut structure. The cover as described in claim 6, wherein the weakened portion has a plurality of the through-portions formed in a radial pattern around the continuous portion. The lid body as described in claim 3, wherein, the corresponding portion of the lid region comprises: a base having a small opening portion, the small opening portion having an opening area smaller than the opening portion surrounded by the edge portion of the container; a small lid portion, which opens and closes the small opening portion; and a hinge portion, which connects the base and the small lid portion; the small lid portion is configured to be rotatable relative to the base portion with the hinge portion as an axis; at least a portion of the through portion is formed at the boundary position between the outer periphery of the small lid portion and the opening edge of the small opening portion. The lid body as described in claim 9, wherein, a gripping portion is provided on the upper surface side of the aforementioned small lid portion. The lid body as described in claim 10, wherein, the aforementioned gripping portion has a pull-tab member; the aforementioned pull-tab member is joined to the upper surface side of the aforementioned small lid portion. The cover body as described in claim 9 has a retaining structure that retains the small cover portion in a state where the small opening portion is opened by rotating the small cover portion relative to the base portion around the hinge portion. The cover as described in claim 9, wherein, an extension portion is formed on the outer periphery of the aforementioned base portion; the aforementioned base portion and the aforementioned extension portion are formed integrally from the aforementioned blank. The cover body as described in claim 13, wherein the hinge portion is formed between the extension portion and the front end of the small cover portion. A cover body as described in claim 9, wherein: the cover body has a retaining structure, which retains the small cover portion in a state where the small opening portion is opened by rotating the small cover portion relative to the base portion about the hinge portion; a gripping portion is provided on the upper surface side of the small cover portion; a claw portion is provided on the gripping portion; an extension portion is formed on the outer periphery of the base portion; the extension portion and the claw portion form the retaining structure. A cover as described in claim 1, wherein a ridge is formed. The cover as described in claim 1, wherein at least a portion of the resin material is impregnated between at least a portion of the fibers. A container with a lid, comprising: the lid as described in claim 1; and the container having the edge, the container with the lid being connected to the container. A combination of a lid and a container, comprising: The lid as described in claim 1; and The aforementioned container having the aforementioned edge. A method for manufacturing a cover body, comprising: an immersion step of immersing a fiber sheet in an immersion liquid containing a resin material; and a drying step of drying the fiber sheet containing the immersion liquid. The method for manufacturing a cover as described in claim 20, wherein, In the middle of the aforementioned drying step or before the aforementioned drying step, a shaping treatment is performed on the aforementioned fiber sheet containing the aforementioned impregnation liquid.