Lid

Abstract

To provide a lid body which is excellent in a sealing performance.SOLUTION: A lid body comprises a top lid integrally having a top surface part and a peripheral surface part, and an annular outer wall material being formed of a paper-based raw material and surrounding the top lid. The top surface part has a folded portion at an outer peripheral edge of the top surface part, which leads to the peripheral surface part, at the folded portion. The outer wall material has an outer wall part to be joined to the outer peripheral surface of the peripheral surface part, and has a folded-back part folded back from a position of a lower end of the outer wall part to an inner peripheral surface of the peripheral surface part. An extending end of the folded-back part opposes to an inner peripheral surface of the peripheral surface part, and separates from the top surface part. In the peripheral surface part, a locking part that locks to an edge of an opening of a container when the part is attached to the container is formed in a region above a portion opposing to the extending end.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a lid. [Background technology]

[0002] 2. Description of the Related Art Lids made of paper-based materials have been proposed as lids that can be attached to containers that hold contents such as beverages such as coffee, dried foods, or prepared foods.

[0003] A known lid has a structure with a canopy and an annular wall material attached to the outer periphery of the canopy. Usually, such a lid is attached to a container in a detachable manner. When the lid is attached to the container, the opening of the container is covered by the canopy and the opening edge of the body of the container is in contact with the wall material. The contact portion between the wall material and the opening edge forms an engagement portion.

[0004] As an annular wall material used for the lid, for example, a blank material made of a strip-shaped paper-based material is rolled into a ring, the ends of the blank material are overlapped to form an overlapping portion, and the ends of the blank material constituting the overlapping portion are joined together, as shown in Patent Document 1. However, because a step is formed at the overlapping portion, a gap is generated in the engagement portion between the lid and the container near the overlapping portion of the wall material, which may cause the contents to unintentionally leak from the gap when the container is tilted, etc.

[0005] Therefore, there is a demand for reducing the gap that occurs between the step of the overlapping portion and the container when the lid is attached to the container.

[0006] As a method for reducing such gaps, for example, as disclosed in Patent Document 2, a technique has been proposed in which a resin is applied to the portion including the step of the overlapping portion to fill in the step. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Special Publication No. 2015-529602 [Patent Document 2] JP 2015-227170 A Summary of the Invention [Problem to be solved by the invention]

[0008] In the technology proposed in Patent Document 2, once resin is applied to the overlapping portion, the difference in the strength of the shape retention of the wall material between the portion to which the resin is applied and the other portion is likely to become large. Therefore, when a lid in which the step is filled with resin is attached to a container, distortion or breakage may occur at the boundary between the portion of the wall material with strong shape retention and the portion with weak shape retention, and there is room for further improvement in the airtightness in terms of preventing the contents from leaking out from the distorted portion of the lid when the container with the lid attached is tilted.

[0009] An object of the present invention is to provide a lid body with excellent sealing properties. [Means for solving the problem]

[0010] The present invention provides a method for manufacturing a car seat comprising: (1) a canopy having an integral top surface portion and a peripheral surface portion; and an annular exterior wall material formed of a paper-based material and surrounding the canopy; The top surface portion has a bent portion on an outer periphery of the top surface portion and is connected to the peripheral surface portion at the bent portion, The exterior wall material has an exterior wall portion joined to an outer peripheral surface of the peripheral portion, and a folded-back portion is provided extending from a lower end position of the exterior wall portion to an inner peripheral surface of the peripheral portion, The extension end of the folded portion faces the inner circumferential surface of the circumferential surface portion and is spaced apart from the top surface portion. And, The peripheral portion has a locking portion that locks onto an open end edge of the container when the peripheral portion is attached to the container, in an upper region of the opposing portion that faces the extended end, When a cut surface is assumed in which the engaging portion is cut along a plane including a center line passing through the center of the canopy and aligned in the thickness direction of the canopy, the distance from the center line to the upper end of the peripheral portion is longer than the distance from the center line to the opposing portion on the cut surface. Lid body, (2) The locking portion has a protruding portion protruding outward. The lid body described in (1) above, (3) The locking portion is formed up to the upper end of the peripheral surface portion. The lid body according to (1) above, (4) The locking portion is further formed in the region of the bent portion. the above (3) The lid body according to (5) The region of the bent portion forms a top surface protruding portion protruding upward or obliquely upward. The lid body according to (1) above, (6) A protrusion is formed on the peripheral surface at a position between the locking portion and the opposing portion. The lid body according to (1) above, (7) A bulge is formed in the folded portion. The lid body according to (1) above, (8) The folded portion has a compressed portion formed around the bulging portion. the above (7) The lid body according to (9) The canopy is a press-molded body. The lid body according to (1) above, (10) The exterior wall material has a structure in which a blank material made of the paper-based material is wound into a ring shape. The lid body according to (1) above, (11) An inclined surface is formed on the upper surface of the top surface portion from the outer periphery of the top surface portion toward the center. The lid body according to (1) above, (12) A compression recess is formed below the top surface portion by compression processing in the surface direction of the top surface portion. The gist of the present invention is the lid body described in (1) above. Effect of the Invention

[0011] According to the present invention, an outer wall material surrounding the canopy is provided on the lid body, and the peripheral portion of the canopy is disposed inside the outer wall material. The outer wall material has an outer wall portion joined to the outer peripheral surface of the peripheral portion, and a folded portion is extended from the lower end position of the outer wall portion to the inner peripheral surface of the peripheral portion. Furthermore, the extended end of the folded portion faces the inner peripheral surface of the peripheral portion. The peripheral portion has a locking portion that locks with the opening edge of the container when attached to the container, formed in an upper area of ​​the opposing portion facing the extended end. That is, the locking portion of the lid body is formed on the peripheral portion above the folded portion. Therefore, even if an overlapping portion is formed in the outer wall material or the folded portion, the overlapping portion of the outer wall material is hidden by the peripheral portion, and the folded portion is located outside the locking portion, so that the lid body can be attached more closely to the container by the locking portion of the lid body.

[0012] In the present invention, when the locking portion is formed with a protruding portion that protrudes outward, wrinkles are less likely to occur on the inner surface of the locking portion, and the lid body is more tightly attached to the container. In this respect, too, the present invention provides a lid body with excellent sealing properties.

[0013] According to the present invention, the lid has an annular outer wall material disposed on the outer peripheral surface of the peripheral portion, and further has a folded portion formed at the lower end of the outer wall material. Therefore, a portion (first portion) of the peripheral portion in which the outer wall material is laminated on the outer peripheral surface side and the inner peripheral surface side is exposed, and a portion (second portion) in which the peripheral portion is sandwiched between the outer wall material and the folded portion are formed. Since the second portion has more layers laminated than the first portion, the shape retention of the second portion is improved, and distortion or folding of the outer wall material and the peripheral portion is less likely to occur, and the shape retention of the lid as a whole is improved. In addition, the first portion, which is more flexible than the second portion, is formed above the second portion, and the locking portion is located in the first portion. When the lid is attached to the container, the lid is tightly fixed to the opening edge of the container by the locking portion of the first portion. Then, after the lid is attached to the container, the attached state can be maintained by the second portion. Therefore, when the lid is attached to the container, the shape of the peripheral portion is likely to be maintained even if a force is applied from the container to the peripheral portion in the outward direction, and it is possible to prevent the locking state between the locking portion of the peripheral portion and the opening edge portion from being unintentionally released. In addition, since the second portion makes it difficult for the exterior wall material and the peripheral portion to be distorted or broken, it is also possible to prevent the contents from leaking from the distorted part of the lid. [Brief description of the drawings]

[0014] [Figure 1] FIG. 1 is a perspective view for explaining an example of the first embodiment. [Diagram 2] FIG. 2 is a cross-sectional view taken along line AA in FIG. 1 and a partially enlarged view of an area S1 enclosed by a dashed dotted line. [Diagram 3] FIG. 3 is a vertical cross-sectional view showing a cross-section taken along line BB in FIG. [Figure 4] FIG. 4 is a cross-sectional view showing an example of a state in which the lid according to the first embodiment is attached to the container, and a partially enlarged view of a region S2 surrounded by a dashed line. [Diagram 5] FIG. 5 is a partial vertical sectional view for explaining another example of the first embodiment. [Figure 6]6A and 6B are partial vertical sectional views for explaining a modified example of the first embodiment. [Figure 7] FIG. 7 is a partial vertical sectional view for explaining a modified example of the first embodiment. [Figure 8] FIG. 8 is a partial vertical sectional view for explaining a modified example of the first embodiment. [Figure 9] 9A and 9B are perspective views for explaining one example of the second embodiment. [Figure 10] FIG. 10 is a cross-sectional view of a main part showing an example of a state in which a lid according to the second embodiment is attached to a container. [Figure 11] FIG. 11 is a perspective view for explaining an example of the third embodiment. [Figure 12] FIG. 12 is a cross-sectional view of a main part showing an example of a state in which a lid according to the third embodiment is attached to a container. [Figure 13] 13A, 13B, 13C, 13D, 13E, and 13F are cross-sectional views for explaining one example of the fifth embodiment. [Figure 14] FIG. 14 is a cross-sectional view for explaining one example of a modification of the fifth embodiment. [Figure 15] Fig. 15A is a cross-sectional view for explaining an example of a modification of the fifth embodiment, and Fig. 15B is a cross-sectional view of a main part showing an example of a state in which a lid according to the modification of the fifth embodiment is attached to a container. [Figure 16] 16A to 16D are cross-sectional views for explaining one example of the fourth embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. The description will be made in the following order. In this specification and the drawings, components having substantially the same functions are denoted by the same reference numerals, and duplicated description will be omitted.

[0016] The following description is a preferred specific example of the present invention, and the contents of the present invention are not limited to these embodiments. In the following description, directions such as front-back, left-right, and up-down are shown for convenience of explanation, but the contents of the present invention are not limited to these directions. In the examples of Figs. 1 to 12, the Z-axis direction is the up-down direction (upper side is +Z direction, lower side is -Z direction), the X-axis direction is the front-back direction (front side is +X direction, rear side is -X direction), and the Y-axis direction is the left-right direction (right side is +Y direction, left side is -Y direction), and the description will be based on this. The relative size ratios of the sizes and thicknesses of the various parts shown in Figs. 1 to 16 are described for convenience, unless otherwise specified, and do not limit the actual size ratios.

[0017] [1 First embodiment] [1-1 Configuration] The lid body 1 according to the first embodiment of the present invention includes a top cover 2 and an outer wall material 3, as shown in Figs. 1, 2, and 3. The lid body 1 can be attached to the opening edge 130 of a bottomed container T with an open top, as described later with reference to Fig. 4 and other figures. In this case, the container T is preferably one having flexibility, particularly at the opening edge 130. However, this does not prohibit the container T from being a container with little or no flexibility, such as a metal container. The lid body 1 can also be attached to a container with little flexibility. Note that Fig. 4 illustrates an example in which a container curl portion 150 is formed at the opening edge 130, which will be described later.

[0018] (canopy) The canopy 2 has a top surface portion 4 and a peripheral surface portion 5 which are integrally formed. The canopy 2 is formed by forming a bent portion 6 by integrally molding a blank material for forming the canopy, which will be described later, to integrally form the top surface portion 4 and the peripheral surface portion 5. An example of integral molding is bending molding, as will be described later. An example of bending molding is press molding. That is, the canopy 2 may be formed, for example, from a bent molded body or a press molded body.

[0019] (Top part) The top surface portion 4 is a portion that covers the opening 140 of the container T when the lid 1 is attached to the container T. The shape of the top surface portion 4 may be determined according to the shape of the container T, and examples of the shape include a circular shape, an elliptical shape, a triangular shape, a rectangular shape, a polygonal shape, and a chamfered shape. In the example shown in Figs. 1 and 2, the top surface portion 4 is configured with a horizontal plane (a plane parallel to the XY plane stretched by the X-axis and the Y-axis) in the inner region of a folding portion 6 described later.

[0020] (Bending part) The top surface portion 4 has a bent portion 6 at its outer periphery 4a. The top surface portion 4 is connected to the peripheral portion 5 at the bent portion 6. The bent portion 6 may be bent, curved, or folded back. In the example of FIG. 1, the bent portion 6 is slightly curved. The outer periphery 4a of the top surface portion 4 is defined by a predetermined region from the outer periphery end 40a of the top surface portion 4 to a position a predetermined distance inward from the outer periphery end 40a.

[0021] Furthermore, the bent portion 6 may be formed so as to be capable of contacting the opening edge portion 130 of the container T when the container T is attached thereto. In other words, when the lid body 1 is attached to the container T, the bent portion 6 of the lid body 1 may come into contact with the container T.

[0022] (peripheral part) The peripheral portion 5 is continuous with the upper end 50a side of the peripheral portion 5 at a bent portion 6 formed on the outer peripheral edge 4a of the top surface portion 4. In addition, in the example of Figs. 1 to 3, the peripheral portion 5 extends slightly diagonally downward from the upper end 50a of the peripheral portion 5.

[0023] The peripheral portion 5 may be formed at least in a position facing the overlapping portion 9 of the exterior wall material 3, but in order to improve the strength of the entire structure of the lid 1 and to achieve a state in which the lid 1 is more tightly locked to the opening edge portion 130 of the container T, it is preferable that the peripheral portion 5 is formed around the entire outer circumferential edge 40a of the top surface portion 4 as shown in Fig. 1 etc. Note that locking the lid 1 to the container T means that the lid 1 can be fixed to the container T in a detachable manner.

[0024] (Side joint) In the examples of Figs. 1 to 3, the outer peripheral surface 5b of the peripheral portion 5 is joined to the inner peripheral surface 3a of the exterior building material 3 at a predetermined position of the exterior building material 3. In this case, it is preferable that the peripheral portion 5 and the exterior building material 3 are surface-joined. The joint portion between the peripheral portion 5 and the exterior building material 3 is called the side joint portion 8. The structure of the side joint portion 8 is not particularly limited as long as it is a portion that joins the peripheral portion 5 and the exterior building material 3, and it may be, for example, an adhesive layer formed by applying an adhesive between the peripheral portion 5 and the exterior building material 3. In addition, when at least one of the peripheral portion 5 and the exterior building material 3 is a coated paper whose surface is coated with a resin or the like, the side joint portion 8 may be a joint formed when the peripheral portion 5 and the exterior building material 3 are directly joined by heat sealing or the like. This does not limit the method of forming the side joint portion 8.

[0025] (Latching part) The peripheral portion 5 has a portion that engages with the opening edge portion 130 of the container T when the lid body 1 is attached to the container T. This portion becomes the engaging portion 15. In the example shown in Figs. 1 to 3, the engaging portion 15 is formed in an area above a portion (opposing portion 16) that faces an extending end 33a of the folded-back portion 33 described below. In the example shown in Figs. 1 to 3, the engaging portion 15 is formed in a shape such that the inclination in a vertical cross section (cross section cut in the Z-axis direction) of the lid body 1 is approximately constant.

[0026] 1 to 4, the lower end 15b of the locking portion 15 is located above the opposing portion 16, but may be located at the opposing portion 16. Therefore, the opening edge portion 130 of the container T may come into contact with the extending end 33a of the folded-back portion 33. Furthermore, when the lid body 1 is attached to the container T, the opening edge portion 130 may come into contact with not only the locking portion 15 but also the inner peripheral surface side of the folded-back portion 33.

[0027] The position of upper end 15a of locking portion 15 is not particularly limited as long as it is located above facing portion 16 and can be locked with opening edge portion 130 of container T. Upper end 15a of locking portion 15 may be located below upper end 50a of peripheral portion 5 as shown in the examples of Figs. 1 to 3, or may be at upper end 50a of peripheral portion 5. Furthermore, locking portion 15 may be further formed on top surface portion 4 as shown in a third embodiment described later.

[0028] (Positional relationship between the upper and lower ends of the locking part) Assuming a plane α that passes through the center K of the canopy 2 and includes a center line m along the thickness direction (Z-axis direction) of the canopy, and assuming a cut surface (corresponding to FIG. 3) obtained by cutting the inner peripheral surface 5a of the peripheral portion 5 with the plane α, it is preferable that the distance from the center line m to the upper end 50a of the peripheral portion 5 is longer than the distance from the center line m to the facing portion 16 on the cut surface as shown in FIG. 3. In other words, when the thickness direction of the canopy 4 is the line of sight (-Z direction), it is preferable that the position A1 corresponding to the facing portion 16 is located closer to the center of the top surface portion 4 (closer to the inside of the lid body 1 in the inward / outward direction of the lid body 1) than the position A2 corresponding to the upper end 50a of the peripheral portion 5.

[0029] It is also preferable that the exterior wall material 3, which will be described later, conforms to the peripheral portion 5. In this case, as shown in Fig. 4, when position B1 of the exterior wall material 3 facing position A1 is compared with position B2 of the exterior wall material 3 facing position A2, it is preferable that position B1 is closer to the inside of the lid body 1 in the inward / outward direction of the lid body 1 than position B2. In this case, it becomes easier to maintain the exterior wall material 3 in a state where position A1 is closer to the inside of the lid body 1 than position A2 of the peripheral portion 5.

[0030] When position A1 is closer to the inside of the lid 1 than position A2 of the peripheral portion 5, the locking portion 15 is easily formed on the inner peripheral surface 5a of the peripheral portion 5 of the lid 1 so as to be oriented in an obliquely upward direction. That is, the direction of the line L perpendicular to the straight line mp passing through positions A1 and A2 is easily oriented in an obliquely upward direction toward the center line m. In such a case, even if the opening edge portion 130 of the container T is pressed against the locking portion 15 of the lid 1 and the opening edge portion 130 of the container T tries to move outward due to the action of the restoring force of the opening edge portion 130, and an outward force acts on the locking portion 15 of the peripheral portion 5, the opening edge portion 130 receives a pressing pressure from the locking portion 15 on the obliquely lower side, and the opening edge portion 130 is more likely to receive a pressing pressure upward, which is more likely to act in a direction that strengthens the locking state between the opening edge portion 130 and the locking portion 15.

[0031] However, this does not prohibit the case where the distance from position A1 of the peripheral portion 5 to the center line m and the distance from position A2 to the center line m are approximately the same (when the peripheral portion 5 extends directly downward) as shown in Fig. 7. Depending on various conditions such as the shape of the container T, the distance from position A1 of the peripheral portion 5 to the center line m and the distance from position A2 to the center line m may be approximately the same.

[0032] (Materials that make up the canopy) The material constituting the canopy 2 is not particularly limited. For example, it can be a paper-based material, a non-paper-based material, or a combination or laminate of these. Examples of paper-based materials include so-called paper, which is manufactured by bonding plant fibers and other fibers, as well as chemical fiber paper, synthetic paper, waterproof paper, coated paper, substitute paper, parchment, wool paper, glass fiber paper, stone paper, ceramic paper, etc. Examples of non-paper-based materials include cloth-based materials (woven fabric materials and non-woven fabric materials), resin-based materials, metal-based materials, wood-based materials, glass-based materials, etc. Examples of a combination of paper-based materials and non-paper-based materials include a sheet made of a paper-based material with a hole formed in the hole and a non-paper-based material attached to the hole. Examples of non-woven fabric materials include so-called air-laid sheets formed by bonding crushed pulp piled up by air flow to form a sheet, pulp-based materials, and non-woven fabrics made of fibers such as natural fiber materials and synthetic fibers. Examples of the resin-based material include resin film and sheet materials, such as films and sheets made of synthetic resin, natural resin, and biodegradable resin. As the resin-based material, films and sheets made of biodegradable resin are preferably used.

[0033] The material forming the canopy 2 may be the same or different between the top surface portion 4 and the peripheral surface portion 5. In the top surface portion 4 as well, the material of the folded portion 6 may be different from that of the portion other than the folded portion 6.

[0034] From the viewpoints of environmental impact and ease of handling, it is preferable that the material constituting the canopy 2 is made entirely of a paper-based material for both the top surface portion 4 and the peripheral surface portion 5. However, this does not mean that the material constituting the canopy 2 is limited to being entirely of a paper-based material when all of the materials constituting the canopy 2 are made of the same material. For example, part or all of the material constituting the canopy 2 may be a resin film.

[0035] From the viewpoint of more effectively concealing the step 11 of the exterior wall material 3, it is preferable to use a paper-based material for at least the material constituting the peripheral portion 5. Examples of paper-based materials include so-called papers produced by bonding plant fibers and other fibers, as well as chemical fiber paper, synthetic paper, waterproof paper, coated paper, substitute paper, parchment, wool paper, glass fiber paper, stone paper, ceramic paper, etc. However, even if the material constituting the peripheral portion 5 is a film material, it is possible to reduce the difficulty in sealing caused by the step 11 of the overlapping portion 9 of the exterior wall material 3.

[0036] As described later, the canopy 2 can be obtained, for example, by bending a blank material for forming a canopy, which is formed by punching a raw material. The raw material for the blank material for forming a canopy (raw material for forming a canopy) can be made of various materials that can be used for the top surface portion 4 and the peripheral surface portion 5.

[0037] (Exterior wall material) The cover body 1 has an exterior wall material 3. The exterior wall material 3 is made of a paper-based material and is formed in a ring shape. In the cover body 1, the exterior wall material 3 surrounds the canopy 2.

[0038] The exterior wall material 3 includes an overlapping portion 9 where two end portions 31, 32 of a blank material 300 for forming a wall material having a predetermined shape are overlapped, and a wall material joint portion 10 that joins the end portions 31, 32 to each other at the overlapping portion 9. The exterior wall material 3 has a structure in which the blank material 300 is rolled into a ring shape.

[0039] A paper-based material is used as the raw material for forming the blank material 300 for forming the wall material. Therefore, a paper-based material is used as the blank material 300. As the paper-based material, various paper-based materials such as those described above regarding the material constituting the peripheral portion 5 can be appropriately used. In the example of Figs. 1 to 3, a paper-based material formed in a fan shape is used as the blank material 300 for forming the wall material, and the blank material 300 is rolled into a ring shape. At this time, two end portions 31 and 32 spaced apart along the circumferential direction of the blank material 300 are overlapped with each other to form an overlapping portion 9. The end portions 31 and 32 here refer to the portions from the edge of the blank material 300 to a predetermined position toward the inside.

[0040] (Wall material joints) As shown in Fig. 2, the wall material joint 10 is formed by joining two ends 31, 32 together at least a part of the overlapping portion 9, preferably the entire overlapping portion 9. Methods for joining the two ends 31, 32 include adhesives, hot melt adhesives, two-part adhesives, heat sealing, ultrasonic bonding, etc., with heat sealing and ultrasonic bonding being preferably used. Reference numeral 11 denotes a step formed in the overlapping portion 9.

[0041] (Outer wall) The exterior wall material 3 has an exterior wall portion 34 facing the outer peripheral surface 5b of the peripheral portion 5, and the inner peripheral surface (inner peripheral surface 3a of the exterior wall material 3) of the exterior wall portion 34 is joined to the outer peripheral surface 5b of the peripheral portion 5. In the example of Figs. 1 to 3, the exterior wall portion 34 is surface-joined to the peripheral portion 5. By disposing the exterior wall portion 34 on the outer peripheral surface 5b side of the peripheral portion 5, the strength of the lid 1 can be improved, and by surface-joining the exterior wall portion 34 to the peripheral portion 5, the shape retention of the peripheral portion 5 is improved.

[0042] (Circumferential surface shape of outer wall portion 34) From the viewpoint of closely surface-joining the outer wall portion 34 to the outer peripheral surface 5b of the peripheral portion 5, it is preferable that the surface-direction shape of the peripheral surface (inner peripheral surface 3a, outer peripheral surface 3b) of the outer wall portion 34 of the exterior wall material 3 is a shape that follows the shape of the outer peripheral surface 5b of the peripheral portion 5 of the canopy 2, as shown in the examples of Figures 1 to 3.

[0043] (Folded part) The exterior wall material 3 has a folded portion 33 extending from the lower end 30b. The folded portion 33 has a structure folded back from the lower end 30b of the exterior wall material 3 to the inner peripheral surface 5a of the peripheral portion 5. Therefore, the exterior wall material 3 is configured so that the outer wall portion 34 and the folded portion 33 cover the lower end 50b side of the peripheral portion 5. In addition, the extending end 33a of the folded portion 33 faces the inner peripheral surface 5a of the peripheral portion 5. In addition, a predetermined portion of the extending end 33a side of the folded portion 33 is located below the top surface portion 4 and is separated from the top surface portion 4.

[0044] It is preferable that the folded portion 33 is formed continuously along the lower end 50b of the peripheral portion 5 so as to cover the entire lower end 50b of the peripheral portion 5.

[0045] Incidentally, the folded portion 33 may face the peripheral portion 5 almost entirely as shown in the examples of FIGS. 1 to 3, or only a partial area of ​​the folded portion 33 may face the peripheral portion 5.

[0046] (Top position of exterior wall material) The position of the upper end 30a of the exterior building material 3 (the position of the upper end of the exterior wall portion 34) is not particularly limited, and may be a position corresponding to the upper end 50a of the peripheral portion 5 as shown in the example of Fig. 1, or may be a position below (on the -Z side) the upper end 50a of the peripheral portion 5. In addition, as will be described in the fourth embodiment later, the upper end 30a side of the exterior building material 3 may extend above (on the +Z side) the upper end 50a of the peripheral portion 5.

[0047] [1-2 Effects] As shown in FIG. 4, the lid 1 according to the first embodiment can be attached to the opening edge 130 of a bottomed container T with an open upper end. The container T includes a bottom portion 120 and a cylindrical body material 110. The container T has a space portion 160 for accommodating contents formed by joining the inner peripheral surface of the cylindrical body material 110 to the periphery of the bottom portion 120. The container T has an opening 140 formed by opening the upper side of the space portion 160. The opening edge portion 130 that defines the opening 140 is formed along the edge of the upper end side of the body material 110. As the container T, a container having a flexible opening edge portion 130 is preferably used. In the example of FIG. 4, a container curl portion 150 for engagement is formed in an outward curl at the opening edge portion 130. The container curl portion 150 can be formed by outwardly rolling an end portion of a blank material for forming the body material 110 that corresponds to the opening edge portion 130. The container T shown in FIG. 4 is an example, and does not limit the container to which the lid 1 can be attached. In addition, in FIG. 4, a gap SP is formed between the position A2 corresponding to the upper end 50a of the locking portion 15 of the peripheral portion 5 and the lower surface of the container curl portion 150 and the top surface portion 4, but the positional relationship between the container curl portion 150 and the lid 1 is not limited to the example in FIG. 4. It is preferable that the gap SP is smaller, and it is more preferable that the gap SP disappears when the lid 1 is attached to the container T. In other words, it is preferable that the locking portion 15 is formed up to the upper end of the peripheral portion 5. In addition, it is more preferable that the top surface portion 4 is in surface contact with the container curl portion 150 as shown in FIG. 5 from the viewpoint of closely attaching the lid 1 to the container T.

[0048] When the lid body 1 is attached to the container T, the lid body 1 is inclined obliquely relative to the opening 140 of the container T, and the inner peripheral surface 5a side of the locking portion 15 of the lid body 1 is abutted against a predetermined position (contact start point) of the opening edge portion 130 of the container T. Next, while maintaining the contact state between the opening edge portion 130 and the locking portion 15, the inclination of the lid body 1 is made closer to horizontal. Accordingly, the contact area between the opening edge portion 130 and the locking portion 15 expands along the opening edge portion 130 from the contact start point, and eventually a state is formed in which only a predetermined portion (protruding portion) of the opening edge portion 130 is located outside the locking portion 15. The peripheral portion 5 is expanded outside the protruding portion of the opening edge portion 130 while a portion located near the upper side of the protruding portion is locally deformed. Then, the opening edge portion 130 is also pushed into the lid body 1, and is locked by the locking portion 15 of the peripheral portion 5.

[0049] In the lid 1, the annular outer wall material 3 is disposed on the outer peripheral surface 5b of the peripheral surface portion 5, and further, a folded portion 33 is formed at the lower end 30b of the outer wall material 3, so that a portion of the peripheral surface portion 5 where the outer wall material 3 is laminated on the outer peripheral surface 5b side and the inner peripheral surface 5a side is exposed (first portion 500a), and a portion where the peripheral surface portion 5 is sandwiched between the outer wall portion 34 of the outer wall material 3 and the folded portion 33 (second portion 500b) are formed. Since the second portion 500b has more layers laminated than the first portion 500a, the shape retention of the second portion 500b is improved, and the shape retention of the lid 1 as a whole is also improved. In addition, the first portion 500a, which is softer than the second portion 500b, is formed above the second portion 500b, and the locking portion 15 is formed in the first portion 500a. Therefore, the lid 1 can form a bonded state in which the locking portion 15 of the first portion 500a is closely bonded to the opening edge portion 130 of the container T, and the bonded state is strongly held by the second portion 500b. Therefore, when the lid 1 is attached to the container T, the peripheral portion 5 can lock the opening edge portion 130 at the locking portion 15 while being locally deformed at the first portion 500a. After the lid 1 is attached to the container T, the shape of the peripheral portion 5 is easily maintained even if a force is applied to the peripheral portion 5 in the outward direction from the container T due to the excellent shape retention of the second portion 500b, so that the state in which the opening edge portion 130 is pressed into the lid 1 is easily held. In this way, the lid 1 can prevent the locking state between the locking portion 15 of the peripheral portion 5 and the opening edge portion 130 from being unintentionally released. In addition, due to the excellent shape retention of the second portion 500b, the exterior wall material 3 and the peripheral portion 5 are less likely to warp or break, which makes it possible to prevent the contents from leaking out from the distorted parts of the lid body 1 after the lid body 1 is attached to the container T.

[0050] In the lid body 1 according to the first embodiment, an outer wall material 3 is provided surrounding the canopy 2, and the peripheral portion 5 of the canopy 2 is disposed on the inner peripheral surface 3a side of the outer wall material 3. The outer wall material 3 has an outer wall portion 34 joined to the outer peripheral surface 5b of the peripheral portion 5, and a folded portion 33 is extended from the lower end 30b position of the outer wall portion 34 toward the inner peripheral surface 5a side of the peripheral portion 5. Furthermore, the extending end 33a of the folded portion 33 faces the inner peripheral surface 5a of the peripheral portion 5. In the peripheral portion 5, a locking portion 15 that locks with the opening edge portion 130 of the container T when the lid body 1 is attached to the container T is formed in an upper region of the facing portion 16 that faces the extending end 33a. That is, the locking portion 15 of the lid body 1 is formed in the peripheral portion 5 part above the folded portion 33. Therefore, even if an overlapping portion 9 is formed in the exterior wall material 3 so that an overlapping portion 9 is formed in the outer wall portion 34 or the folded portion 33, the overlapping portion 9 of the outer wall portion 34 is concealed by the peripheral portion 5, and the folded portion 33 is formed in a position away from the engaging portion 15, so that the lid body 1 can be attached more closely to the container T by the engaging portion 15 of the lid body 1.

[0051] [1-3 Modifications] (Variation 1) As shown in FIG. 6A, the peripheral surface portion 5 of the cover 1 may have a protrusion 350 formed at a position between the locking portion 15 and the opposing portion 16 or at the locking portion 15 (Modification 1). In the example of FIG. 6A, the protrusion 350 is formed at a position between the locking portion 15 and the opposing portion 16. The protrusion 350 is formed in a state of extending along the circumferential direction of the peripheral surface portion 5. The method of formation and material of the protrusion 350 are not particularly limited. For example, the protrusion 350 may be formed of a resin or the like applied to a predetermined position on the inner peripheral surface 5a of the peripheral surface portion 5. The protrusion 350 may also be formed of a strip of a paper-based material attached to a predetermined position on the inner peripheral surface 5a of the peripheral surface portion 5. According to the cover body 1 of the modified example 1, a protrusion 350 is formed at a position between the engaging portion 15 and the opposing portion 16 or at the engaging portion 15, so that the downward movement of the opening edge portion 130 is prevented by the protrusion 350, thereby more effectively preventing the engaging state between the engaging portion 15 of the peripheral portion 5 and the opening edge portion 130 from being unintentionally released.

[0052] (Variation 2) In the cover 1, as shown in FIG. 6B, a bulging portion 360 may be formed in the folded portion 33 (Modification 2). The method of formation and material of the bulging portion 360 are not particularly limited. For example, the bulging portion 360 can be formed by compressing a predetermined region in the folded portion 33. That is, as shown in FIG. 6B, a compressed portion 370 is formed in the compressed region in the folded portion 33. The thickness of the non-compressed portion 380 outside the compressed region is relatively thicker than the thickness of the compressed portion 370. At this time, as shown in FIG. 6B, the bulging portion 360 is formed in the non-compressed portion 380, and the compressed portions 370 are formed around the non-compressed portion 380 (above and below in the example of FIG. 6B).

[0053] According to the lid body 1 of the second modification, the bulging portion 360 is formed in the folded portion 33, and thus the downward movement of the opening edge portion 130 is prevented by the bulging portion 360, so that it is possible to more effectively prevent the locking state between the locking portion 15 of the peripheral portion 5 and the opening edge portion 130 from being unintentionally released. In addition, the compressed portion 370 is formed around the bulging portion 360, and thus the structure of the folded portion 33 can be strengthened, and the shape retention of the lid body 1 can be further improved.

[0054] (Variation 3) As shown in FIG. 8, the top surface 4 may have an inclined surface 250 that slopes downward from the outer periphery 4a of the top surface 4 of the canopy 2 toward the center (Modification 3). In this case, it is preferable that an opening that serves as the outlet 200 is formed at a predetermined position of the canopy 2. With such a lid 1, when a user is about to drink the contents of a container T containing a liquid (beverage) such as coffee while the lid 1 is attached to the container T, the contents discharged from the outlet 200 to the outside of the canopy 2 flow efficiently through the inclined surface 250 into the user's mouth. In addition, a straw can be inserted into the outlet 200 to suck out the contents with the straw. As shown in the example of FIG. 8, a sealant 210 may be attached so as to cover the position of the outlet 200. As the sealant 210, a resin film having an adhesive layer formed on one side thereof can be used, and the sealant 210 can be attached to the surface of the top surface 4 with the adhesive layer facing the periphery of the outlet 200.

[0055] [2 Second embodiment] [2-1 Configuration] In the cover 1 according to the first embodiment, the peripheral portion 5 extends downward at a constant inclination in the vertical direction in the cross section cut along the plane α described above, but as shown in Figures 9A and 9B, the peripheral portion 5 of the cover 1 may have a protruding portion 7 (second embodiment). In this case, it is preferable that the protruding portion 7 is formed on the locking portion 15 of the peripheral portion 5 as shown in Figures 9A and 9B.

[0056] (overhang) In the cover 1 according to the second embodiment, the locking portion 15 of the peripheral portion 5 has the protruding portion 7 protruding outward as described above. However, the direction from the center of the top surface portion 4 toward the outer peripheral edge 4a is the outward direction. The center of the top surface portion 4 indicates the position (position K in FIG. 1) that is the geometric center of the shape of the top surface portion 4 when the top surface portion 4 is viewed in a plane. In the example of FIG. 9A etc., the protruding portion 7 is formed in a state where the entire locking portion 15 of the peripheral portion 5 protrudes outward, and the inner peripheral surface 5a side of the peripheral portion 5 is a concave curved surface, and the outer peripheral surface 5b side of the peripheral portion 5 is a convex curved surface. The concave curved surface of the inner peripheral surface 5a and the convex curved surface of the outer peripheral surface 5b have corresponding concave and convex surface shapes.

[0057] 9A does not limit the formation range of the protrusion 7 to only the locking portion 15. For example, as shown in FIG. 9B, the protrusion 7 may be formed in a state in which the entire peripheral portion 5 including the locking portion 15 protrudes outward. Moreover, the protrusion 7 may be formed on a portion of the locking portion 15.

[0058] In the lid 1, the locking portion 15 is preferably formed into a shape that matches the shape of the opening edge portion 130 of the container T by the concave curved surface of the overhanging portion 7. In this case, as shown in Fig. 10, the lid 1 can be formed so that the locking portion 15 can come into surface contact with the opening edge portion 130 of the container T when the lid 1 is attached to the container T. Note that in the example of Fig. 9A, the locking portion 15 is formed into a shape that matches the shape of the container curl portion 150 by the concave curved surface of the overhanging portion 7.

[0059] In the second embodiment, the outer wall portion 34 of the exterior wall material 3 is preferably formed in a state of projecting outward in accordance with the shape of the peripheral surface portion 5. In this case, it becomes easy to surface-bond the exterior wall material 3 to the region of the outer peripheral surface 5b that corresponds to the projecting portion 7, and when the lid body 1 is attached to the container T, the fixed state between the container T and the lid body 1 can be strengthened.

[0060] (wrinkle) When the canopy 2 is obtained by bending a blank material for forming a canopy, wrinkles may occur from the bent portion 6 of the outer peripheral edge 4a of the top surface portion 4 to the peripheral surface portion 5. In this regard, the formation of the overhanging portion 7 in the peripheral surface portion 5 makes it easier for wrinkles to be formed in a stretched state. By adjusting the shape of the overhanging portion 7, etc., even if wrinkles are formed in the engaging portion 15 of the peripheral surface portion 5, the formation of the overhanging portion 7 in the engaging portion 15 makes it possible to reduce the number of wrinkles formed from the ends (upper end 15a and lower end 15b) of the engaging portion 15 toward the center of the overhanging portion 7.

[0061] [2-2 Effects] According to the lid body 1 of the second embodiment, as in the first embodiment, the overlapping portion 9 of the exterior wall material 3 is concealed by the peripheral portion 5, and the folded-back portion 33 is positioned outside the engaging portion 15, so that the lid body 1 can be more closely attached to the container T by the engaging portion 15 of the lid body 1.

[0062] Furthermore, in the lid body 1 of the second embodiment, as shown in Figures 9A, 9B, 10, etc., the inner side of the protrusion portion 7 of the peripheral portion 5 is a curved surface in the longitudinal section of the peripheral portion 5. Therefore, when the lid body 1 is attached to the container T, it is less likely that the opening edge portion 130 will easily and unintentionally detach from the peripheral portion 5.

[0063] In particular, when the container T has flexibility in the opening edge 130, the opening edge 130 pressed into the overhanging portion 7 formed in the locking portion 15 may exert an outward restoring force on the overhanging portion 7, but since the inner surface side of the overhanging portion 7 is a curved surface, the opening edge 130 is pressed further into the overhanging portion 7, which tends to act in a direction that strengthens the locking state between the opening edge 130 and the overhanging portion 7. In addition, since the locking portion 15 is formed so as to be able to make surface contact with the opening edge 130 at the overhanging portion 7, the locking state between the opening edge 130 and the locking portion 15 is further strengthened. In particular, when the exterior wall material 3 is formed of a paper-based material and is formed in a shape that matches the peripheral surface portion 5, the state of the curved surface of the overhanging portion 7 becomes more stable, which tends to improve the stability of the state in which the opening edge 130 is pressed into the overhanging portion 7, and the opening edge 130 is less likely to easily come off unintentionally from the overhanging portion 7 of the peripheral surface portion 5.

[0064] [3 Third embodiment] [3-1 Configuration] In the lid body 1 of the second embodiment described above, a protrusion 7 was formed on the engaging portion 15 of the peripheral portion 5, but as shown in Figure 11, the lid body 1 may further include a top protrusion 70 formed in the area of ​​the folded portion 6 of the top portion 4 (third embodiment).

[0065] (Top protrusion) In the top surface portion 4 of the lid body 1, a top surface protrusion 70 that protrudes upward or obliquely upward is formed in the region of the folded portion 6. In the example of FIG. 11, the top surface protrusion 70 is formed in a state in which the top surface portion 4 protrudes upward, a concave curved surface is formed on the lower surface side of the top surface portion 4, and a convex curved surface corresponding to the concave curved surface is formed on the upper surface side of the top surface portion 4. The concave curved surface formed on the top surface protrusion 70 of the top surface portion 4 is a continuous surface with the concave curved surface formed on the protrusion 7 of the peripheral surface portion 5. In addition, the concave curved surface of the top surface protrusion 70 and the concave curved surface of the protrusion 7 are formed in a shape that matches the shape of the opening edge portion 130 of the container T, that is, the lid body 1 is formed so as to be able to make surface contact with the opening edge portion 130 of the container T when it is attached to the container T. In the example of FIG. 11, the concave curved surface of the top surface protruding portion 70 and the concave curved surface of the protruding portion 7 are formed into a shape that matches the shape of the container curl portion 150.

[0066] (Latching part) As shown in the example of Figures 11 and 12, the locking portion 15 in the lid 1 according to the third embodiment is not only formed up to the upper end 50a of the peripheral portion 5, but is also formed in the area of ​​the folded portion 6 of the top surface portion 4. In the example of Figures 11 and 12, the locking portion 15 is formed over an area including a predetermined area (area K1) from the upper end 50a of the peripheral portion 5 to the lower end 50b side of the peripheral portion 5 and the area of ​​the folded portion 6 (area K2). A protrusion 7 is formed in area K1, and a top surface protrusion 70 is formed in area K2.

[0067] [3-2 Effects] According to the lid body 1 of the third embodiment, as in the first embodiment, the overlapping portion 9 of the exterior wall material 3 is concealed by the peripheral portion 5, and the folded-back portion 33 is positioned outside the engaging portion 15, so that the lid body 1 can be more closely attached to the container T by the engaging portion 15 of the lid body 1.

[0068] Furthermore, as with the second embodiment, when the lid body 1 of the third embodiment is attached to the container T, the opening edge portion 130 is less likely to unintentionally detach from the protruding portion 7 of the peripheral portion 5.

[0069] In particular, when the container T has flexibility in the opening edge 130, the opening edge 130 pressed into the locking portion 15 that forms the overhanging portion 7 and the top surface overhanging portion 70 may try to apply an outward restoring force to the locking portion 15, but since the inner surface side of the overhanging portion 7 is curved, the opening edge 130 is pressed further into the overhanging portion 7, and a pressing force is applied upward from the lower end side of the overhanging portion 7 to the opening edge 130. In the third embodiment, since the top surface overhanging portion 70 is formed, the opening edge 130 is pressed further into the top surface overhanging portion 70. For this reason, the locking state between the opening edge 130 and the locking portion 15 is easily strengthened. In addition, since the locking portion 15 is formed so as to be able to come into surface contact with the opening edge 130 at the overhanging portion 7 and the top surface overhanging portion 70, the locking state between the opening edge 130 and the locking portion 15 is further strengthened. In particular, when the exterior wall material 3 is formed from a paper-based material and is formed into a shape that matches the peripheral portion 5, the state of the curved surface of the protrusion portion 7 becomes more stable, making it less likely that the opening edge portion 130 will easily and unintentionally detach from the engaging portion.

[0070] [4 Fourth embodiment] [4-1 Configuration] 16A and other figures, the lid 1 of the first embodiment may have a compression recess 700 formed on the underside of the top surface 4 of the lid 1 (fourth embodiment). In the example of FIG. 16A, the compression recess 700 is formed in the locking portion 15 of the peripheral surface portion 5.

[0071] (Compression recess) 16A, in the cover 1 according to the fourth embodiment, the compressed recess 700 is formed as a portion of the peripheral surface portion 5 that is relatively compressed in the thickness direction of the peripheral surface portion 5. In the example of Fig. 16A etc., the entire locking portion 15 of the peripheral surface portion 5 is compressed more than the outside of the locking portion 15, forming a concave surface on the inner peripheral surface 5a side of the peripheral surface portion 5, and the portion of the peripheral surface portion 5 that forms the locking portion 15 is the compressed recess 700.

[0072] In the example of FIG. 16A, the compressed recess 700 has a concave curved surface on the inner circumferential surface 5a side of the peripheral surface portion 5, and a non-convex surface on the outer circumferential surface 5b side of the peripheral surface portion 5. However, this is not limited to the case where the compressed recess 700 has a non-convex surface on the outer circumferential surface 5b side of the peripheral surface portion 5. For example, as shown in FIG. 16D, a convex curved surface may be formed on the outer circumferential surface 5b of the peripheral surface portion 5. In this case, it is preferable that the outer wall portion 34 of the exterior wall material 3 is compressed and the compressed recess 720 is formed on the outer wall portion 34 side. In FIG. 16D, the inner circumferential surface 3a side of the compressed recess 720 on the outer wall portion 34 side is a concave curved surface. In this case, it is preferable that the concave curved surface of the inner circumferential surface 3a formed in the compressed recess 720 has a shape following the convex curved surface formed on the outer circumferential surface 5b of the peripheral surface portion 5. This can be realized, for example, by applying pressure to a predetermined position on the inner peripheral surface 5a of the peripheral surface portion 5 from the inner peripheral surface 5a of the peripheral surface portion 5 toward the outer wall portion 34. When pressure is applied to a predetermined position on the inner peripheral surface 5a of the peripheral surface portion 5, the pressure is applied from the predetermined position to the outer wall portion 34 via the peripheral surface portion 5, and the outer wall portion 34 is compressed and a concave surface is formed at the position on the outer wall portion 34 where the pressure is applied, that is, the compressed concave portion 720 is formed. At this time, a convex surface corresponding to the concave surface of the compressed concave portion 720 is formed on the outer peripheral surface 5b side of the peripheral surface portion 5. Then, a concave surface is formed at a predetermined position on the inner peripheral surface 5a of the peripheral surface portion 5. In the portion where the concave surface is formed (the predetermined position on the inner peripheral surface 5a), the peripheral surface portion 5 may be compressed to form the compressed concave portion 700, or may be a non-compressed portion. In addition, in the predetermined position on the inner peripheral surface 5a where the concave surface is formed, the peripheral surface portion 5 may be stretched without being compressed. For example, when a resin film material is used as the material for the canopy 2, due to the rollability of the film material, when pressure is applied to the peripheral portion 5, the film material forming the canopy 2 is stretched to form a concave surface at the position where the concave surface is formed on the inner peripheral surface 5a of the peripheral portion 5. When the canopy 2 is formed from a film material, it is possible to make the peripheral portion 5 thinner than when the canopy 2 is formed from a thick sheet material, and this makes it easier to form the compressed recess 720 on the outer wall portion 34 side, as shown in Fig. 16D.In addition, in FIG. 16D, the outer peripheral surface 3b of the outer wall portion 34 is a non-irregular surface at the position of the compressed recess 720, but this is just one example, and a slightly convex surface may be formed at the position of the compressed recess 720.

[0073] In the example of Fig. 16A, one compressed recess 700 is formed in the locking portion 15, but as shown in Fig. 16B, a plurality of compressed recesses 700 may be formed. When a plurality of compressed recesses 700 are formed, they are preferably formed side by side in the vertical direction. In the example of Fig. 16B, the locking portion 15 is formed with an uneven portion 710 in which the plurality of compressed recesses 700 form an uneven surface that is continuous in the vertical direction. The uneven surface formed in the uneven portion 710 may be wavy or have a continuous mountain shape, or may be an uneven surface that is not uniform.

[0074] Moreover, the compressed recess 700 and the compressed recess 720 may be combined with not only the first embodiment but also the second and third embodiments and the fifth embodiment described later. For example, Fig. 16C shows an example in which the compressed recess 700 is formed in the lid 1 according to a modified example of the fifth embodiment described later.

[0075] The compression recesses 700 can be realized by using a roller in the joining step that has a peripheral surface formed with recesses and protrusions corresponding to the compression recesses 700. The joining step is a step of joining the exterior wall material 3, the peripheral surface portion 5, and the folded-back portion 33, as will be described in detail later in the manufacturing method for the lid body 1.

[0076] [4-2 Effects] As described in the second and third embodiments, when canopy 2 is obtained by bending a blank material for forming a canopy, wrinkles may occur from bent portion 6 of outer peripheral edge 4a of top surface portion 4 to peripheral surface portion 5. In this regard, in bent portion 6 continuing to peripheral surface portion 5, a stretched state of wrinkles from bent portion 6 to peripheral surface portion 5 is easily formed because compressed recesses 700 (compressed recesses 720 in outer wall portion 34) are formed. In particular, even if wrinkles are formed within engaging portion 15 of peripheral surface portion 5, the number of wrinkles formed at engaging portion 15 in peripheral surface portion 5 can be reduced because compressed recesses 700 (compressed recesses 720 in outer wall portion 34) are formed.

[0077] [5 Fifth embodiment] [5-1 Configuration] 13A, 13C, etc., in the lid 1 of the first to fourth embodiments, the upper end 30a of the exterior wall material 3 may be extended above the upper surface of the top surface 4 (fifth embodiment). The portion of the exterior wall material 3 above the upper surface of the top surface 4 is referred to as an upper outer wall portion 35.

[0078] [5-2 Effects] According to the fifth embodiment, the upper outer wall portion 35 is formed, so that the lid body 1 can be easily attached and detached to and from the container T to which the lid body 1 is attached. In addition, when the top surface portion 4 is formed with an outlet 200 as exemplified in Fig. 8, by tilting the container T to which the lid body 1 is attached with the mouth placed against the upper outer wall portion 35, the contents that flow out from the outlet 200 onto the upper surface of the top surface portion 4 and flow over the upper outer wall portion 35 can be easily swallowed through the mouth.

[0079] [5-3 Modifications] (Variation 1) In the fifth embodiment, a ring-shaped curled portion 100 may be formed by winding outward along the upper end of the upper outer wall portion 35 (the upper end 30a of the outer wall material 3) (FIG. 13B). In this example, an opening surrounded by the curled portion 100 is formed on the upper end 30a side of the outer wall material 3 in the lid 1.

[0080] In the lid 1, when the curled portion 100 is formed on the exterior wall material 3, the shape of the exterior wall material 3 becomes more stable, and the stability of the state in which the opening edge portion 130 is pressed into the lid 1 when the container T is attached to the lid 1 is improved. Therefore, the opening edge portion 130 is less likely to be unintentionally detached from the locking portion 15 of the peripheral portion 5. In addition, when an opening that becomes the outlet 200 is formed in a part of the top surface portion 4 of the lid 1, the end face of the blank material 300 for forming the exterior wall material 3 can be prevented from being exposed to the upper end 30a of the exterior wall material 3. Therefore, when a user takes the contents that have flowed out from the outlet 200 onto the surface of the top surface portion 4, even if the user places his / her mouth on the curled portion 100, the end face of the blank material 300 for forming the exterior wall material 3 can be prevented from directly contacting the mouth, and the texture of the exterior wall material 3 can be improved.

[0081] From the viewpoint of the structure to avoid exposing the end face of the blank material 300 for forming the exterior building material 3 at the upper end 30a of the exterior building material 3 as described above, a structural part different from the curled part 100 may be formed at the upper end of the upper exterior wall part 35 (the upper end 30a of the exterior building material 3) as shown in Fig. 13D to Fig. 13F. In Fig. 13D to Fig. 13F, a predetermined part near the end face of the blank material 300 is folded back downward on the upper end 30a side of the exterior building material 3 to form an upper folded back part 101. The folding direction of the upper folded back part 101 may be the outer peripheral surface 3b side (Fig. 13D) or the inner peripheral surface 3a side. When a predetermined part near the end face of the blank material 300 is folded back to the inner peripheral surface side 3a, the end face of the blank material 300 (the lower end of the upper end folded back part 101) may reach the top surface part 4 (Fig. 13E) or may be separated from the top surface part 4 (Fig. 13F).

[0082] (Variation 2) In the cover 1 according to the fifth embodiment, as shown in Figures 14, 15A and 15B, a protruding portion 71 protruding upward may be formed along the outer peripheral end 40a of the outer peripheral edge 4a of the top surface 4. It is preferable that the protruding portion 71 is formed at a position on the outer peripheral edge 4a of the top surface 4 closer to the outer peripheral end 40a.

[0083] (ridge) As shown in Fig. 14, Fig. 15A, and Fig. 15B, a protruding portion 71 is formed in the upper direction on the top surface 4 of the lid 1 at a position closer to the boundary between the folded portion 6 and the peripheral surface 5. In the example of Fig. 14, a concave curved surface is formed on the lower surface side of the protruding portion 71, and a convex curved surface corresponding to the concave curved surface is formed on the upper surface side of the protruding portion. In the example of Fig. 15A, in addition to the protruding portion 71, the lid 1 has a bulging portion 360 formed on the folded portion 33 as described in the second modification of the first embodiment.

[0084] (Action and effect) With such a lid body 1, a raised portion 71 is formed that rises upward along the outer peripheral end 40a of the outer edge 4a of the top surface portion 4, thereby effectively preventing the contents that have flowed down the upper outer wall portion 35 from accumulating at the boundary between the top surface portion 4 and the outer wall material 3.

[0085] When the canopy 2 is obtained by bending a blank for forming a canopy, wrinkles may occur from the bent portion 6 of the outer peripheral edge 4a of the top surface portion 4 to the peripheral surface portion 5. In this regard, in the bent portion 6 continuing to the peripheral surface portion 5, the formation of the raised portion 71 makes it easy for the wrinkles from the bent portion 6 to the peripheral surface portion 5 to be stretched out. In particular, even if wrinkles are formed within the locking portion 15 of the peripheral surface portion 5, the formation of the raised portion 71 makes it possible to reduce the number of wrinkles formed at the locking portion 15 of the peripheral surface portion 5. Therefore, the locking portion 15 formed on the peripheral surface portion 5 can be made to come into closer surface contact with the opening edge portion 130.

[0086] For example, in the lid body 1 shown in the example of FIG. 15A, when the lid body 1 is attached to the container T as shown in FIG. 15B, the opening edge portion 130 of the container T can be locked by the bulge portion 360 formed on the folded portion 33, the upper portion of the bulge portion 360 in the folded portion 33, and the locking portion 15 formed on the peripheral surface portion 5. In this case, the locking portion 15 formed on the peripheral surface portion 5 can be in closer surface contact with the opening edge portion 130 due to the formation of the raised portion 71, and the bulge portion 360 formed on the folded portion 33 and the upper portion of the bulge portion 360 in the folded portion 33 contact the lower side of the opening edge portion 130, thereby preventing the opening edge portion 130 from coming off. Therefore, the lid body 1 can be tightly attached to the container T and unintentional detachment of the lid body 1 from the container T can be prevented.

[0087] Next, a method for manufacturing the lid of the present invention will be described in detail below. The method will be described below by taking as an example a case where the lid according to the first embodiment is manufactured and the entire lid 1 is made of a paper-based material.

[0088] [7 Manufacturing method] [7-1 Manufacturing method details] First, a raw material made of a paper-based material is punched into a circular shape to integrally form a blank material for forming a canopy, thereby forming a bent portion 6, at which time a top surface portion 4 and a peripheral portion 5 are formed. An example of integral molding is a bending process. Specifically, the blank material made of a paper-based material is bent while the outer peripheral edge portion is fixed, thereby integrally forming a canopy 2 having a top surface portion 4 and a peripheral portion 5 that are continuous at the bent portion 6 (shaping process).

[0089] The bending process can be realized by, for example, performing a press working process. The press working process can be performed, for example, as follows.

[0090] First, the outer peripheral edge of the blank material for forming the canopy is fixed by a blank holder. In this state, the blank material is sandwiched between a die having a shape corresponding to the shape of the canopy 2, and the blank material is pressurized by the die. At this time, the blank material is shaped into the shape of the canopy 2. The conditions of the press processing, such as temperature, pressure, and humidity, are not particularly limited, and may be determined according to conditions such as the shape of the canopy 2 and the material of the blank material. Therefore, the press processing may be performed in a non-heated state or in a heated state. In addition, it may be performed in a humidified state or in a non-humidified state. From the viewpoint of realizing a more dense shaping in the press processing, it is preferable that the press processing is performed under a heated and humidified state.

[0091] When the canopy 2 is manufactured in the shaping process, it is possible to avoid the formation of a structure in the peripheral portion 5 that corresponds to the step 11 caused by the overlapping portion 9 in the exterior wall material 3. Furthermore, by carrying out the press processing after fixing the blank material with the blank holder in advance, it is possible to suppress the formation of wrinkles in the peripheral portion 5. From the viewpoint of further suppressing the formation of wrinkles, it is preferable that the blank holder is arranged so as to fix the entire periphery of the blank material.

[0092] A blank material for forming a wall material is prepared. For example, a roll of paper material punched into a fan shape can be used as the blank material for forming the wall material. Ends 31, 32 of the blank material for forming the wall material are overlapped to form an overlapping portion 9, and the wall material joint 10 is formed at the overlapping portion 9. As described above, the method for forming the wall material joint 10 is not particularly limited, and for example, a method such as ultrasonic welding can be used. As a result, a ring-shaped exterior wall material 3 is formed.

[0093] The inner peripheral surface of the annular exterior wall material 3 is brought into contact with the outer peripheral surface 5b of the peripheral portion 5 of the canopy 2, and the lower end side of the exterior wall material is folded back toward the inner peripheral surface of the peripheral portion to form the folded back portion 33. At this time, the portion of the exterior wall material facing the outer peripheral surface of the peripheral portion becomes the exterior wall portion. Then, the exterior wall material 3, the peripheral portion 5, and the folded back portion 33 are joined (joining process). In the joining process, the inner peripheral surface 3a of the exterior wall material 3 and the outer peripheral surface 5b of the peripheral portion 5 are joined, and the folded back portion 33 and the inner peripheral surface of the peripheral portion are joined. For the joining process, heat sealing or the like can be used. As a specific example of the process, an adhesive is applied to the outer peripheral surface 5b of the peripheral portion 5 in advance, and in a state where the peripheral portion 5 of the canopy 2 is pressed against the inner peripheral surface 3a of the exterior wall material 3, a roller is pressed against the inner peripheral surface 5a of the peripheral portion 5 to apply pressure. The roller rotates along the inner peripheral surface 5a of the peripheral portion 5 while rotating. At this time, the roller is preferably in a heated state. The above-mentioned joining process is an example, and the joining process is not limited to this method. For example, coated paper with a coating layer formed on the surface with resin or the like may be used as the blank material for forming the canopy and the blank material for forming the wall material, and the coating layers may be placed facing each other on the peripheral surface 5 of the canopy 2 and the inner peripheral surface 3a of the exterior wall material 3, and the rollers may be pressed against each other to heat and pressurize. Other joining methods may be used. The same process may be performed on the folded portion 33 and the peripheral surface 5. A roller having a shape corresponding to the uneven shape on the peripheral surface may be used. Even if wrinkles are formed on the peripheral surface 5 in the shaping process, the wrinkles on the peripheral surface 5 are spread out, making it possible to reduce the wrinkles on the peripheral surface 5.

[0094] In addition, when the protruding portion 7 is formed on the peripheral portion 5 as in the second embodiment, it is preferable to use a roller having a shape corresponding to the shape of the protruding portion 7 formed on the peripheral surface. In this case, it is also possible to form the protruding portion 7 on the peripheral portion 5 in the joining step. For example, when the protruding portion 7 forms a convex curved surface, it is preferable to use a roller having a convex curved surface formed on its peripheral surface. When the protruding portion 7 is formed, even if wrinkles are formed on the peripheral portion 5 in the shaping step, the wrinkles on the peripheral portion 5 are pushed out, and it is also possible to reduce the wrinkles on the peripheral portion 5.

[0095] [7-2 Effects] According to the above-mentioned method for manufacturing a lid, a lid that has excellent sealing properties and in which the occurrence of wrinkles on the side surface is more effectively prevented can be manufactured.

[0096] Although one embodiment of the present invention and its modified examples have been specifically described, the present invention is not limited to the above-mentioned embodiment and its modified examples, and various modifications based on the technical idea of ​​the present invention are possible, and for example, each embodiment and its modified examples can be combined with each other. Furthermore, for example, the configurations, methods, steps, shapes, materials, values, etc. listed in the above-mentioned embodiment and its modified examples are merely examples, and configurations, methods, steps, shapes, materials, values, etc. different from these may be used as necessary. [Explanation of symbols]

[0097] 1 Lid 2. Canopy 3. Wall Materials 3a Inner surface of wall material 3b Outer surface of wall material 4 Top section 4a Outer edge of top surface 40a Outer edge of top surface 5 Side part 5a Inner surface of side part 5b Outer surface of side part 6 Bending section 7 Overhang 8 Side joint 9. Overlap 10 Wall material joints 11 Steps 15 Locking part 16 Opposing part 31, 32 End of blank 33 Folded section 33a Extended end 34 Exterior wall 35 Upper outer wall 70 Top projection 71 Ridge 100 Curl section 200 Outlet 210 Sealing material 250 Slope 350 Protrusion 360 Bulge 500a First Part 500b Second Part T container SP Gap

Claims

1. A canopy having a top surface portion and a peripheral surface portion integrally therewith, and an annular outer wall material formed of a paper-based material and surrounding the canopy, The top surface portion has a bent portion on an outer periphery of the top surface portion and is connected to the peripheral surface portion at the bent portion, The exterior wall material has an exterior wall portion joined to an outer peripheral surface of the peripheral portion, and a folded-back portion is provided extending from a lower end position of the exterior wall portion to an inner peripheral surface of the peripheral portion, an extension end of the folded portion faces the inner circumferential surface of the circumferential surface portion and is spaced apart from the top surface portion; The peripheral portion has a locking portion that locks onto an open end edge of the container when the peripheral portion is attached to the container, in an upper region of the opposing portion that faces the extended end, When a cut surface is assumed in which the engaging portion is cut along a plane including a center line passing through the center of the canopy and aligned in the thickness direction of the canopy, the distance from the center line to the upper end of the peripheral portion is longer than the distance from the center line to the opposing portion on the cut surface. Lid body.

2. The locking portion has a protruding portion protruding outward. The lid according to claim 1 .

3. The locking portion is formed up to the upper end of the peripheral surface portion. The lid according to claim 1 .

4. The locking portion is further formed in the region of the bent portion. The lid according to claim 3.

5. The region of the bent portion forms a top surface protruding portion protruding upward or obliquely upward. The lid according to claim 1 .

6. A protrusion is formed on the peripheral surface at a position between the locking portion and the opposing portion. The lid according to claim 1 .

7. A bulge is formed in the folded portion. The lid according to claim 1 .

8. The folded portion has a compressed portion formed around the bulging portion. The lid according to claim 7.

9. The canopy is a press-molded body. The lid according to claim 1 .

10. The exterior wall material has a structure in which a blank material made of the paper-based material is wound into a ring shape. The lid according to claim 1 .

11. An inclined surface is formed on the upper surface of the top surface portion from the outer periphery of the top surface portion toward the center. The lid according to claim 1 .

12. A compression recess is formed below the top surface portion by compression processing in the surface direction of the top surface portion. The lid according to claim 1 .

Images