WO2022181737A1

WO2022181737A1 - Lid body

Info

Publication number: WO2022181737A1
Application number: PCT/JP2022/007764
Authority: WO
Inventors: 朗高野
Original assignee: 株式会社Ky7
Priority date: 2021-02-24
Filing date: 2022-02-24
Publication date: 2022-09-01
Also published as: JP2023126959A; JPWO2022181737A1

Abstract

The purpose of the present invention is to use a paper-based material to provide a lid body having a superior ability to seal a container opening.　The lid body of the present invention is detachably attached to the container opening, and is characterized in that: the lid body is formed by bending the peripheral edge of a top lid member comprising a paper-based material downward, and has a top lid part having a top surface part and a suspended piece formed at the periphery thereof, and a side wall part which is formed by joining both ends of a side-wall member comprising the paper-based material and surrounds the periphery of the top surface part of the top lid; the side wall part is formed as an incline tapering from the top end side toward the bottom end side, and is joined to the suspended piece of the top lid part at the inner surface of the side wall part; and the top surface part of the top lid part is formed so as to rise upward.

Description

lid

The present invention relates to a lid made of paper-based material.

　Convenience stores and supermarkets have traditionally sold food and drink in simple containers. For example, at convenience stores, beverages such as coffee are sold in cup-shaped containers made of paper or plastic. Various types of lids have been proposed to cover the opening of the container. Conventionally, lids made of plastic moldings have been widely used as this type of lid. However, since plastic products may cause various environmental problems, in recent years, there has been a call to reduce the use of plastic as a raw material for disposable simple containers and lids for food and beverages. For this reason, paper lids have been proposed instead of plastic lids, but paper materials have lower elasticity than plastic materials and are less moldable, so they can be molded into complicated shapes like plastic. Therefore, it is necessary to use paper that has a shape and structure that can reliably close the mouth of the container with high airtightness like a plastic lid and that does not leak even if the contents of the container are liquid. Getting the lid wasn't easy.

Conventionally, in order to improve the adhesion of the paper lid to the mouth of the container, various structural devices have been devised. and a canopy surrounded by the wall surface, and a lid configured to fit inside the mouth of the container and close the mouth of the container (for convenience, an inner fitting lid say.) is described. Further, Patent Document 2 discloses a top plate and a side wall installed downward around the top plate. A lid configured to close the part from the outside (for convenience, called an external fitting lid) is described.

JP-A-2006-248530 Japanese translation of PCT publication No. 2012-513940

The paper lids described in

Patent Documents

1 and 2 do not have sufficient adhesion to the mouth of the container when the lid is closed, and there is a risk that the liquid in the container may leak out. Like the lid body, the inner fitting lid configured to be fitted inside the container body to close the container is easy to fit into the mouth of the container, but the lid is easy to come off, and moreover, the inner wall of the container and the paper lid. There is a problem that the liquid in the container tends to leak out from between the wall surface of the container. On the other hand, like the paper lid described in Patent Document 2, the outer fitting lid having a structure that fits into the curled portion provided on the periphery of the mouth of the container is compared to the inner fitting lid described in Patent Document 1. It is excellent in sealing the container. However, when fitting the outer fitting lid into the mouth of the container, it is necessary to fit the lid into the mouth of the container while partially deforming the lid. Since it is not easily deformable, it is not easy to externally fit it into the mouth of the container. In particular, a paper lid having a structure in which a top plate is surrounded by side walls, as described in Patent Document 2, has high strength at the side wall portion, and therefore has poor deformability when fitted into the mouth of a container. In order to facilitate fitting into the mouth of the container, the inner dimension of the lid must be designed to be larger than the outer dimension of the mouth of the container. There was a problem.

The present invention has been made in view of the above points, and the hanging piece formed on the peripheral edge of the canopy is joined and integrated with the inner surface of the lower wall of the side wall, and is configured to close the mouth of the container from the outside. The lid is made of a paper-based material and can be easily fitted into and removed from the opening of the container. Another object of the present invention is to provide a lid body with extremely little risk of contents leaking out.

That is, the present invention
(1) A lid detachably attached to the mouth of a container, the lid is formed by bending a peripheral edge of a canopy member made of a paper-based material downward to form a top surface and a hanging piece formed on its peripheral edge. and a side wall portion formed by joining both ends of a side wall member made of a paper-based material and surrounding the top surface portion of the canopy portion, the side wall portion extending from the upper end side to the lower end The lid body is tapered toward the side and is joined to the hanging piece of the canopy portion on the inner surface of the side wall portion, and the top surface portion of the canopy portion is formed to rise upward. ,
(2) The inner surface of the lower wall where the side wall, which is tapered from the upper end to the lower end, is joined to the hanging piece of the canopy when the mouth of the container is sealed. The lid according to (1) above, in which the container mouth portion contacts the
(3) The lid according to (2) above, wherein the inner surface of the lower wall is formed with a fitting portion that fits with the mouth portion of the container.
(4) The lid according to (3) above, wherein the fitting portion is formed in a shape that fits with the curled portion of a container having a curled portion at the mouth.
(5) The lid according to (3) above, wherein the fitting portion of the lower wall is an annular groove formed by pressing the inner surface of the lower wall.
(6) The lid according to (2) above, wherein the inner dimension of the lower end of the lower wall is formed smaller than the outer dimension of the container mouth.
(7) The lid according to (1) above, wherein the side wall is inclined at an inclination angle equal to or smaller than the inclination angle of the container wall to which the lid is attached,
(8) The lid according to (1) above, wherein the lower end of the lower wall is attached in a non-contact state with the container wall when attached to the container mouth.
(9) The side walls and the canopy are integrally joined by joining the hanging pieces of the canopy that are bent at an angle of inclination less than the angle of inclination of the side walls along the inner surface of the side walls. The lid according to (1) above,
(10) The lid according to (1) above, wherein the upper end side of the side wall forms an upper side wall that protrudes upward from the top surface.
is the gist of it.

The lid body of the present invention is formed by joining both ends of a side wall member made of a paper-based material, forming a tapered slant shape from the upper end to the lower end of the side wall. The formed canopy portion is joined to the inner surface of the side wall portion, and is a lid body having a structure that is externally fitted to the mouth portion of the container. It fits tightly to the mouth and is excellent in sealing the container. The lid body of the present invention is a lid body in which a hanging piece around the top surface portion is joined to the inner surface of the side wall portion to integrate the canopy portion and the side wall portion, and the lower portion of the side wall externally fitted to the mouth portion of the container is the side wall. It has a structure in which the member and the hanging piece of the canopy part overlap, and the side wall part has a high strength, so the lid has a structure that does not easily deform when it is fitted to or removed from the container, but the top part is inside. Since the lid is curved upward in the direction of the container, when fitting the lid to the container, the lid is easily deformed and can be easily fitted to the mouth of the container. Since the fitting to the mouth of the container is excellent, there is very little possibility that the lid, once fitted to the container, will accidentally come off and the contents of the container will leak out. For this reason, unlike the case of a container containing hot coffee or the like, even if the internal pressure of the container becomes high, there is no risk that the lid will easily come off. Since the force in the direction of increasing the fitting force is increased, it is possible to realize a higher fitting property to the container, which is effective even when used as a lid body for a large-sized container. In addition, despite the high degree of fitting to the mouth of the container, the lid can easily be removed because the top surface of the lid can easily be deformed against the force of removal. Therefore, even if the size of the lid is slightly smaller than the outer diameter of the mouth of the container, the lid can be easily fitted into and removed from the mouth of the container, so that a lid with high sealing performance can be provided. In addition, since the side wall portion is formed in a tapered and slanted shape, the stacking property of the lid is good in addition to the fitting property, and the storage and transportation of the lid can be made space-saving.

FIG. 3 is a perspective view showing a state in which the container is closed with the lid of the present invention; FIG. 2 is a longitudinal sectional view along line II-II of FIG. 1; FIG. 4 is an enlarged cross-sectional view of the vicinity of the fitting portion in a state where the lid is fitted into the container; FIG. 4 is a longitudinal sectional view of a different embodiment of the lid; FIG. 10 is a longitudinal sectional view of yet another embodiment of the lid; FIG. 10 is a longitudinal sectional view of yet another embodiment of the lid; FIG. 10 is a longitudinal sectional view of yet another embodiment of the lid; FIG. 10 is a longitudinal sectional view of yet another embodiment of the lid; FIG. 10 is a longitudinal sectional view of yet another embodiment of the lid; FIG. 3 is a vertical cross-sectional view of a state in which the lid bodies of the embodiment shown in FIG. 2 are superimposed; FIG. 10 is an explanatory view of action when attaching and detaching the lid to and from the container; FIG. 4 is a perspective view of a lid with a label attached to an opening/closing piece; FIG. 13 is a perspective view showing a state in which the opening/closing piece of the lid shown in FIG. 12 is opened; FIG. 10 is a plan view of lids having different label forms; FIG. 10 is a perspective view showing a lid body of an embodiment with a different label form; FIG. 16 is a perspective view showing a state in which the opening/closing piece of the lid shown in FIG. 15 is opened;

The lid body of the present invention will be described below with reference to the drawings.

FIG. 1 shows a state in which a lid body 1 according to one embodiment of the present invention is fitted into a container 2, and FIG.
The lid 1 is formed of a side wall portion 3 and a canopy portion 4 surrounded by the side wall portion 3 and integrally joined to the side wall portion 3 . The side wall portion 3 joins both ends of a fan-shaped side wall member in which the length of the arc shape on the upper end side is longer than the length of the arc shape on the lower end side (the side different from the upper and lower ends of the arc shape of the side wall member). The side wall portion 3 is formed in an annular shape, and the side wall portion 3 is tapered from the upper end side to the lower end side (in the direction of the mouth portion of the container 2) and is formed in an inclined shape (generally inclined in the direction of the arrow a in FIG. 2), and the canopy portion 4 The outer surface side of the hanging piece 6 is joined to the inner surface side of the side wall portion 3 . The lower wall 8 of the side wall portion 3 is formed so that the inner dimension d2 on the lower end side is smaller than the inner dimension d1 on the upper end side. In the canopy part 4, a hanging piece 6 is formed on the peripheral edge of the top panel part 5 by, for example, bending the peripheral edge of a canopy member formed in a circular shape or the like downward, and the top panel part 5 extends upward toward the center. It is formed in a raised shape (in a shape in which the top surface portion 5 bulges toward the upper surface side). Further, in the lid body 1 of this embodiment, the lower end of the side wall portion 3 is folded toward the inner surface of the hanging piece 6 of the canopy portion 4 to form a folded portion 7 . The lower wall 8 (the side wall portion located below the top surface portion 5) is formed by being joined to the side. The inner side of the lower wall 8 of the side wall portion 3 of the lid 1 is a fitting portion 10 for fitting to the mouth portion of the container 2 (curl portion 9 in the case of the container shown in FIG. 2). In the lid body 1 of the present invention, the side wall portion 3 tapered from the upper end to the lower end is joined to the hanging piece 6 of the canopy portion 4 in a state where the mouth of the container is sealed. The opening of the container 2 is in contact with the inner surface of the lower wall 8 which is closed. Like the lid 1 shown in FIG. The mouth is made to touch. A curled portion 12 is formed at an upper end portion of an upper wall 11 of the side wall portion 3 (a portion of the side wall portion 3 positioned above the top surface portion 5), if necessary. When the lid body 1 is used for a beverage container such as coffee, the top surface portion 5 of the canopy portion 4 may be provided with a drinking spout 16 having an opening/closing piece as necessary. The shape and size of the mouthpiece 16 and the like are not limited to those shown in FIG. 1, and may be of any shape and size.

In the lid 1 of the present embodiment, the contact portion between the mouth portion (curl portion 9) of the container 2 and the folded portion 7 of the lower end portion of the side wall portion 3 folded toward the inner surface side of the hanging piece 6 of the canopy portion 4 is It is configured to be a fitting portion 10 , and when the lid is closed, the mouth portion of the container 2 is in contact with the folded portion 7 of the side wall portion 3 of the lid body 1 . In the lid body 1 of the present invention, the inner dimension of the lower wall 8 is smaller than the outer dimension of the container mouth, so that the fitting strength with the container mouth is increased, but the lower end of the side wall 3 is positioned inside. In the case of a lid body having a folded portion 7 that is folded back, the hardness of the lower wall 8 is high. It is possible to increase the strength of the fitting with the mouth of the container. Further, as shown in FIG. 3, if the inclination angle α of the side wall portion 3 of the lid 1 is made smaller than the inclination angle β of the side wall 2a of the container 2 (the lid 1), the fitting force of the lid 1 to the container 2 is increased, and the tightness is improved. The inclination angle α of the side wall portion 3 of the lid 1 and the inclination angle β of the side wall 2a of the container 2 may be the same or different, and may satisfy α>β. By setting α<β, the fitting strength of the lid 1 to the container 2 is enhanced. The inclination angle α of the side wall portion 3 is preferably 2.5° to 10°, more preferably 3° to 9°, and still more preferably 4.5° to 8.5°.
By making the inner dimension of the lower wall 8 of the lid 1 smaller than the outer dimension of the mouth of the container 2, or by making the inclination angle α of the side wall 3 smaller than the inclination angle β of the side wall 2 of the container, the container Although the fitting force of the lid 1 to the container 2 is increased, the lid 1 needs to deform more when fitting to the mouth of the container 2 . However, in the lid body 1 of the present invention, since the top surface portion 5 is formed in an upwardly curved shape, the lower wall 8 is formed by joining the side wall portion 3 and the hanging piece 6 of the canopy portion 4 to increase the strength. In spite of this, the lid 1 can be easily deformed when the lid 1 is fitted to or removed from the container 2, so that the lid 1 can be easily fitted to or removed from the container.
The lid 1 having the cut 17 at the lower end of the side wall 3 allows the liquid in the container 2 to leak when the container 2 is tilted when the mouth of the container 2 containing a liquid such as a beverage is closed. It is possible to reduce the risk of coming out. In particular, when the inner dimension of the lower end of the lid 1 is smaller than the outer dimension of the mouth of the container 2, the lid 1 is excellent in adhesion to the mouth of the container 2. , the liquid in the container 2 tends to leak out when the container 2 is tilted. In this regard, by providing the notch 17 on the lower end side of the side wall portion 3, leakage of the liquid in the container 2 can be prevented. In the case of the lid 1 provided with the mouthpiece 16 as shown in the figure, if the notch 17 is provided on the opposite side of the mouthpiece 16, leakage of the liquid in the container 2 can be effectively prevented. The shape and number of the cuts 17 are not particularly limited, and the cuts 17 are not limited to being provided at one location, and may be provided at a plurality of locations. If the number of cuts 17 provided is too large, the closed state of the lid body 1 tends to become unstable.
The inclination angle α of the side wall portion 3 of the lid 1 may be formed so as to be the same angle over the entire side wall portion 3 or may be varied depending on the location of the side wall portion 3 . For example, when the lid body 1 is circular as shown in FIG. 1 and the like, the inclination angle α of the side wall portion 3 may be formed to be the same angle. In addition, when the cover body 1 has a shape other than a circular shape, such as a polygonal shape including a square shape such as a rectangle or square, or an elliptical shape, , the inclination angle α of the side wall portion 3 may be changed according to the location of the side wall portion 3 . By varying the inclination angle α of the side wall portion 3 in this way, it is possible to maintain good sealing performance regardless of the shape of the container 2 . The shapes of the lid 1 and the container 2 are not limited to those described above, and may be other shapes.

The lid body 1 of the present invention is excellent in stackability because the side wall portion 3 is formed in a slanted shape, and as shown in FIG. can be stored and transported, and storage and transport costs can be reduced.

Since the side wall portion 3 is formed in an annular or cylindrical shape by joining both ends of the side wall member, a fitting portion that contacts the mouth portion (curl portion 9) of the container 2 like the lid body 1 shown in FIG. When 10 is made of a part (lower wall 8) of the side wall 3, that is, when the fitting part 10 is formed so that the container mouth contacts the folded part 7 at the lower end of the side wall 3, the fitting part 10 is formed. There is a joint portion of the side wall member in the joint portion 10, and the mouth portion of the container 2 is in contact with this joint portion when the lid is closed. There is a risk that gaps will form and that the tightness of the container will be compromised. Therefore, when the inner peripheral surface of the lower wall 8 of the side wall portion 3 is press-pressed, it is possible to reduce the difference in level at the joining portion of the folded portion 7, and it is difficult to form a gap between the lid body 1 and the container 2. The airtightness of the lid 1 is improved. In FIG. 4, the inner peripheral surface of the lower wall of the side wall portion 3 is compressed by a pressure press or the like to form a ridge portion 13 in a portion with a small degree of compression, and the ridge portion 13 is fitted between the top surface portion 5. FIG. 5 shows an aspect in which the fitting portion 10 in the shape of an annular groove is formed by pressing or the like. If the fitting portion 10 is formed between the top surface portion 5 and the ridge portion 13 as shown in FIG. can reduce the step of the joint portion, and the fitting property with the curled portion 9 of the container mouth portion can be improved, and the sealing property can be improved. The protruding streak portion 13 is not limited to the case where it is formed by the difference in the degree of compression at the time of pressure pressing or the like, and may be provided by joining a separate member or the like. The forming method is not limited to pressing or the like, and any method such as joining separate members to form a protruding portion can be adopted. Further, the shape and structure of the fitting portion 10 can be arbitrarily formed as long as the fitting portion 10 can be fitted to the mouth portion of the container.
In addition, in order to reduce the step at the joint portion of the side wall portion 3, it is not limited to the method of reducing the step by pressing. Before joining, the vicinity of the both ends is compressed so that the thickness is gradually reduced in the direction of the edge (the circumferential direction of the side wall 3), and then the both ends are joined to form the side wall 3. You can do it.

In the lid 1 of the present invention, the lower end 8a of the lower wall 8 of the lid 1 meets the side wall 2a of the container 2 when the fitting portion 10 is fitted to the mouth portion (curl portion 9) of the container and the lid is closed. It is preferable that they are formed so as not to contact each other. When removing the lid 1, the lower end 8a of the lower wall 8 can be lifted by putting a finger or the like thereon, so that the lid 1 can be easily removed.

In the lid 1 of the present invention, the joining of both ends of the side wall members for forming the side wall portions 3 and the joining of the hanging pieces 6 of the canopy portion 4 and the inner surface of the side wall portions 3 can be performed by a known joining method. can. Examples of bonding methods include ordinary adhesives, hot-melt adhesives, two-component adhesives, heat sealing, ultrasonic bonding, and the like. has heat-sealing properties, it is preferable from the standpoint of production efficiency because it can be joined by heat-sealing. The heat-sealing property can be imparted by laminating or coating a resin having heat-sealing property.

The side wall portion 3 is tapered from the upper end side to the lower end side, and the lid body 1 of the present invention is formed such that the top surface portion 5 of the canopy portion 4 is lifted upward. When the hanging piece 6 is formed around the top surface portion 5 by bending, the hanging piece 6 is formed at an angle smaller than the inclination angle of the side wall portion 3. More preferably, the top surface side of the top surface portion 5 and the hanging piece 6 The angle formed by the outer surface side of is 90 ° or less, more preferably less than 90 °. By a method such as joining the inner surface of the side wall portion 3, the lid body 1 having the top surface portion 5 raised upward can be formed. It is also possible to obtain the lid body 1 of the present invention in which the top surface 5 is raised upward by designing the outer dimension of the top surface 5 to be larger than the inner dimension of the side wall 3 to which the top surface 4 is joined. can. The lid body 1 of the present invention can be easily manufactured by applying the same technology as the manufacturing technology of conventional paper containers.

In the lid body 1 of the present invention, the top surface portion 5 may be formed to be lifted upward. It is preferably 1 mm or more. The upper limit of the lifting degree varies depending on the size of the lid body 1, but is usually preferably 6 mm or less, more preferably 5 mm or less, and even more preferably 4 mm or less. As shown in FIG. 2, the degree of lifting means the boundary portion between the top surface of the top surface portion 5 and the hanging piece 6 in the canopy portion 4 (the lowest portion in the top surface portion 5) and the maximum height of the lifted portion of the top surface portion 5. The difference between the lower part: h. The lifting height of the top panel 5 is adjusted by, for example, the inclination angle of the hanging piece 6 formed around the top panel 5, the outer dimension of the top panel 5, and the inner dimension of the side wall 3 to which the top panel 4 is joined. can be set by adjusting a combination of

As the paper-based material constituting the side wall portion 3 and the canopy portion 4 of the lid 1 of the present invention, a slurry of fiber raw materials is drawn on a net, dried or press-dried, and paper-made into a sheet. So-called paper materials and open fiber raw materials such as pulverized pulp obtained by pulverizing raw material sheets made of pulp fibers etc. with a pulverizer are stacked by air flow, and the fibers of the stacked body are fixed with a binder. The obtained so-called air-laid sheet and the like, and those obtained by laminating a plurality of these sheets, and the like can be mentioned. A so-called transparent paper made of cellulose nanofibers (cellulose microfibrils) can also be used. The paper-based material may be made of pulp alone, or may include fibers such as non-pulp fibers, synthetic fibers, and regenerated fibers, but natural fibers other than pulp and naturally degradable fibers are preferable. It preferably contains 50% by mass or more of pulp, more preferably 70% by mass or more, more preferably 80% by mass or more, and particularly preferably 100% by mass of pulp. The paper-based material can be a synthetic resin or natural resin film or non-woven fabric, a wood-based material such as wood foil, or a composite material with a material such as aluminum foil. It is preferable that the total content of pulp, natural fiber, naturally degradable resin, etc. is 50% by mass or more, and that containing 80% by mass or more of pulp is particularly preferable. The higher the content of naturally degradable components such as pulp, the easier it is for the paper-based material to biodegrade, which is preferable. In particular, it is preferable that the pulp content is 95% by mass or more.

Pulp includes those obtained from wood pulp, non-wood pulp, waste paper pulp, and the like. Pulp includes softwood pulp such as red pine, Todomatsu, Ezo pine, Douglas fir, hemlock, and spruce; hardwood pulp such as beech, oak, birch, eucalyptus, poplar, and alder; wood pulp such as a mixture of softwood and hardwood pulp; , bagasse pulp, bamboo pulp, cereal pulp, straw pulp, abaca pulp, non-wood pulp such as cotton pulp, waste paper pulp, and the like can be used. Since softwood pulp has a longer fiber length than hardwood pulp, paper materials using pulp with a long fiber length such as softwood pulp have a higher degree of entanglement between fibers. The pulverized pulp also has a longer fiber length than the pulverized pulp obtained by pulverizing a raw material sheet made of hardwood pulp, so the entanglement of the fibers improves the strength of the paper-based material.

It is preferable that the paper-based material has water resistance, and a material such as water-resistant paper that has been given water resistance in advance may be used. good. The coat layer can be provided by adhering a film or applying a coating agent, but is preferably provided by applying a coating agent. The coating layer is made of polyvinyl chloride, polyvinylidene chloride, polyurethane, polyethylene terephthalate, olefin resins such as polyethylene and polypropylene, polyvinyl alcohol, acrylic resins such as polyacrylic acid, polymethacrylic acid, and acrylonitrile-butadiene-styrene copolymer. etc., polyethylene terephthalate, cellophane, nylon, ethylene-vinyl alcohol copolymer, polymethylpentene, polyvinyl acetate, polylactic acid, polycaprolactone, polyhydroxyalkanoate, starch-based resin, etc., and two or more Among them, acrylic resins, olefin resins, urethane resins, biodegradable resins, etc. are preferable, and particularly, for example, cellulose derivatives, polylactic acid, polycaprolactone, polyvinyl alcohol, polybutylene succinate. Resins called biodegradable resins such as phosphate resins, modified polyethylene terephthalate, polyglycolic acid, starch resins, and biodegradable urethane resins are preferable because they improve natural degradability.
As the paper-based material used for the lid 1 of the present invention, those having a basis weight of about 150 to 400 g/m ² can be used, but those having a weight per unit area of 160 to 360 g/m ² are more preferable, and those having a basis weight of 170 to 350 g/m ² are more preferable. is more preferred.

(Other embodiments)
The lid 1 described above is configured so that the mouth of the container 2 is in contact with the folded portion 7 of the side wall 3 when the lid is closed. It may be configured to be in contact with the piece 6 . FIG. 6 shows a different embodiment of the lid 1 of the present invention. In the lid 1 of this embodiment, the folded portion 7 at the lower end of the side wall portion 3 is formed short, and the tip portion of the folded portion 7 and the canopy portion A fitting portion 10 is formed between the hanging piece 6 of 4 and the hanging piece 6 . The fitting portion 10 in the lid body 1 of this form is formed between the tip portion of the folded portion 7 and the surface of the hanging piece 6 , and when the lid is closed, the curled portion 9 of the container opening is positioned on the inner surface of the hanging piece 6 , and is in contact with the tip portion of the folded portion 7 . Incidentally, the fitting portion 10 may be formed in the shape of a concave groove by pressing the inner surface of the hanging piece 6 (not shown). The lid 1 shown in FIG. 6 is configured such that the container opening (curl portion 9) is in contact with the inner surface of the hanging piece 6 of the canopy portion 4 when the lid is closed. Since there is no step due to the above, there is little risk of forming a gap with the mouth of the container 2, and there is an advantage that the sealability is high. Further, if the smoothness of the inner surface of the hanging piece 6 is increased by further pressing the inner surface of the hanging piece 6, the sealing performance is further improved.

FIG. 7 shows an example in which the lid body 1 of the form shown in FIG. indicates When such a surrounding bulging line portion 14 is provided along the periphery of the upper surface side of the top surface portion 5, a drink such as coffee in the container can be drunk from a drinking port (not shown) provided on the lid body 1. In this case, the leftover beverage is likely to return into the container through the mouthpiece, and the risk of the beverage accumulating on the peripheral portion of the top surface portion 5 is reduced. Also in the lid body 1 of this embodiment, the fitting portion 10 may be formed into a concave groove by pressing or the like. In addition to the lid body of the present embodiment (for example, the lid body shown in FIGS. 2, 4, and 5), by forming the surrounding bulging streak portion 14 around the top surface portion 5, the top surface can be It is possible to prevent the beverage from accumulating on the peripheral portion of the face portion 5 . In the lid body 1 of this form, the lifting degree h of the top surface portion 5 is the height at the boundary between the top surface portion 5 and the rising portion of the bulging streak portion 14 as shown in FIG. is the difference between height and
Although the bulging streak portion 14 is provided at the boundary portion between the side wall portion 3 and the top surface portion 5 , a slight gap may be formed between the bulging streak portion 14 and the side wall portion 3 .

As shown in FIG. 8, the lid body 1 of the present invention does not have a folded portion 7 at the lower end of the side wall portion 3, and the outer surface side of the hanging piece 6 of the canopy portion 4 is joined to the inner surface side of the side wall portion 3. can be In the lid body 1 shown in FIG. 8, recessed grooves are formed on the surface of the hanging piece 6 by pressing or the like. However, like the lid body 1 shown in FIG. A bulge 15 may be formed in the . In addition, it is not limited to the case of forming the fitting portion 10 in the shape of a concave groove. The fitting portion 10 can be configured in any form as long as it can be made to fit. 8 and 9, the mouth portion of the container 2 is in contact only with the surface of the hanging piece 6 of the canopy portion 4 when the lid is closed, and has no contact with the side wall portion 3. As shown in FIG. Similarly to the lid 1 shown in FIG. 7, the lid 1 shown in FIGS. The airtightness is high, and the airtightness is further improved by increasing the smoothness by press-pressing the inner surface side of the hanging piece 6 or the like.

The side wall portion 3 and the canopy portion 4 in the lid body 1 of the present invention may be formed using the same paper-based material or different paper-based materials, but the manufacturing cost is reduced. It is preferable to use the same paper-based material from above. When the lid body 1 of the present invention is used as a lid for a beverage container such as coffee, the top surface portion 5 may be provided with a drinking opening (not shown). A window made of a transparent or translucent film or sheet such as synthetic resin, cellophane paper, paraffin paper, glassine paper, parchment paper, or the like may be provided on the top panel 5 so that the contents can be visually checked. The lid body 1 of the present invention is not limited to a container having an inclined side wall 2a such as a coffee cup or cup noodle container, but may be a cylindrical container such as a nut can. The lid 1 of the present invention can be used for various containers such as paper containers, plastic containers, plastic foam containers, and metal cans, and is not limited to containers for storing liquids, and can be used for various foodstuffs such as side dishes and lunch boxes. It can also be used as a lid for a container, a storage container for dry food, or a non-food container.

In the lid body 1 of each of the above embodiments, the side wall portion 3 has the upper wall 11 protruding toward the upper surface side around the top surface portion 5, but the side wall portion 3 does not necessarily have the upper wall 11. Also good. The upper end of the side wall portion 3 may be configured to be substantially flush with the top surface portion 5, but when used as a lid for a beverage container, an upper wall protruding from the upper surface of the top surface portion 5 may be formed. is preferred. Further, the side wall portion 3 may not have the curled portion 12 on the upper end side. Although not shown, instead of providing the curled portion 12, a bent portion formed by bending the upper end portion of the side wall portion 3 outward or inward may be provided. You can set it. When the lid body 1 is used as a lid body for a container containing a beverage such as coffee, it should have a curled portion 12 or a bent portion when the upper end portion of the side wall portion of the lid body is touched when drinking the beverage. When the content of the container is a liquid beverage such as coffee, the mouthfeel of the beverage is improved.

In the lid body 1 of each embodiment described above, the case where the top surface portion 5 is formed in a circular shape is shown, but the lid body 1 of the present invention can be formed in an arbitrary shape such as an elliptical shape or a rectangular shape. . In the above example, the container 2 provided with the curled portion 9 at the mouth portion was used, but the lid 1 of the present invention can be applied not only to containers having the curled portion 9, The shape of the opening of a container to which the lid 1 of the present invention can be applied is arbitrary.

When an opening/closing piece 16a for forming the mouthpiece 16 or the like is provided, a knob for opening/closing the opening/closing piece 16a is provided. The operation of pulling down (closing the drinking spout 16) can be easily and hygienically pulled up. As a method of providing the knob, for example, as shown in FIG. In the illustrated example, one end portion 18a of the label 18 is provided as a joint portion with the opening/closing piece 16a, and a knob portion 19 is formed on the other end portion 18b of the label 18, which is the free end side. A holding portion 20 is cut into the label 18, and a holding receiving portion 21 of the holding portion 20 is cut into the top surface portion 5. As shown in FIG. is pinched and the opening/closing piece 16a is pulled up to open the drinking spout 16, the holding portion 20 of the label 18 is inserted into the holding receiving portion 21 formed on the top surface portion 5 and held, thereby opening the opening/closing piece 16a. The state (state in which the spout 16 is open) can be maintained. As a method for joining one end of the label 18 to the opening/closing piece 16a, any method such as adhesive bonding, heat sealing bonding, ultrasonic bonding, high frequency bonding, or the like can be adopted.

An example in which an opening/closing piece 16a for forming the drinking spout 16 and the like is provided will be described below with reference to FIGS. 12 to 16. FIG. 12 to 16 show the lid 1 in which the curled portion 12 is not formed on the upper wall 11 of the side wall portion 3, but the curled portion 12 is formed on the upper wall 11 as described above. Alternatively, as a shape other than the curled portion 12, for example, the upper end portion of the upper wall 11 may be formed into a flange shape. Moreover, you may form in shapes other than these. In the example shown in FIGS. 12 and 13 , the top surface portion 5 is provided with a label 18 which is separate from the top surface portion 5 . One end portion 18a of the label 18 is joined to the opening/closing piece 16a, and a knob portion 19 is formed at the other end portion 18b (non-joint side end portion). A holding portion 20 is formed between one end portion 18a and the other end portion 18b of the label 18. The holding portion 20 provided on the label 18 is inserted into a holding receiving portion 21 formed by cutting the top surface portion 5. Although the case where it is held is shown, it is not limited to the case where the separate label 18 is joined to provide the knob portion 19, and the knob portion can be formed integrally with the opening/closing piece 16a. The method for holding the opening/closing piece 16a in the raised state is not limited to the case where the holding portion 20 formed by cutting the label 18 is inserted into the holding receiving portion 21 formed by cutting the top surface portion 5 to hold the label 18 or the like. Any known holding means can be employed, such as holding the label 18 or the like on the top surface 5 or the side wall 3 by providing an adhesive layer to keep the opening/closing piece 16a open. Further, when the holding portion 20 is formed by cutting the label 18, the shape of the holding portion 20 is not limited to the V-shaped cutting as shown in the figure, and can be formed by cutting into an arbitrary shape. Further, the label 18 is not limited to being pulled up along the opening direction of the opening/closing piece 16a as shown in the figure, but may be constructed so as to be pulled up diagonally or laterally with respect to the opening direction of the opening/closing piece 16a. As long as the opening/closing piece 16a can be pulled up, the lifting direction of the label 18 for pulling up the opening/closing piece 16a is arbitrary.

FIG. 14 shows a different embodiment of the holding portion 20 provided on the label 18. In this example, instead of forming the holding portion 20 by cutting, the side portion of the free end side (non-bonded portion side) of the label 18 as shown in the figure. A recessed notch 22 may be formed to form a holding portion 20 in the vicinity of the knob portion 19, and the label 18 may be twisted to insert and hold the holding portion 20 into the holding receiving portion 21 of the top surface portion 5. good. Further, when the holding portion 20 is formed by providing the concave cut 22 in the label 18, the concave cut 22 is not limited to the case where the holding portion 20 is inserted into the holding receiving portion 21 formed by cutting the top surface portion 5 to hold the holding portion 20. , the upper end edge portion (upper end portion 3a) of the side wall portion 3 may be engaged with and held. 15 and 16, a concave notch 22 is provided near the tab 19 of the label 18, the tab 19 of the label 18 is folded along the folding line 23, and the concave notch 22 is formed on the upper end 3a of the side wall 3. It shows a mode in which it is held by being locked to. Also in this case, the leading end of the recessed notch 22 provided in the label 18 may be inserted into a holding receiving portion cut into the top surface 5 to hold the opening/closing piece 16a in an open state. The means and structure for doing so can be arbitrarily selected.

12 to 16, a label 18 is provided on the opening/closing piece 16a, and a knob 19 formed on the label 18 is picked and operated to pull up the opening/closing piece 16a to open the drinking spout 16. However, instead of providing a label on the opening/closing piece 16a, the tip end of the opening/closing piece 16a is used as the holding portion 20, and is inserted into the holding receiving portion 21 formed on the top surface portion 5, so that the drinking mouth 16 can be opened. may be configured to maintain an open state. It should be noted that the holding portion 20 is not limited to the tip side end portion of the opening/closing piece 16, as long as it is configured so that the drinking spout 16 can be maintained in an open state by the holding receiving portion 21. , a portion other than the tip end may be used as the holding portion 20 . Here, with respect to the distal end and the proximal end of the opening/closing piece 16a, the end on the side where the opening/closing piece 16a is continuous with the top surface portion 5 (the portion that functions like a hinge when opening/closing) is referred to as the proximal end. The end on the opposite side is called the tip.

When the lid 1 of the present invention is fitted, the lid 1 tends to be deformed into an upward warp as a whole, and as shown in FIG. Then, the canopy portion 4 is warped, and the fitting portion 10 is sequentially fitted toward the opposite side of the lid body 1, to the mouth portion of the container 2. fitting of the lid body 1 can be performed easily and reliably.

1 Lid 2 Container 2a Side wall of container 3 Side wall 3a Upper end of side wall 4 Canopy 5 Top panel 6 Hanging piece 7 Lower end folded part of side wall 8 Lower wall 8a Lower end of lower wall 9 Curled part of container 10 Fitting Joint portion 11 Upper wall 12 Curled portion of lid body 13 Protruding portion 14 Protruding portion 15 Protruding portion 16 Mouthpiece 17 Notch 18 Label 19 Knob portion 20 Holding portion 21 Holding portion 22 Concave notch 23 Folding line

Claims

A lid detachably attached to the mouth of the container,
The lid is formed by bending the peripheral edge of the canopy member made of paper-based material downward to form a canopy portion having a top surface and hanging pieces formed on the peripheral edge thereof, and both ends of the side wall member made of paper-based material. a side wall portion that is formed by joining and surrounds the periphery of the top surface portion of the canopy portion;
The side wall portion is tapered from the upper end to the lower end, and is joined to the hanging piece of the canopy on the inner surface of the side wall,
A lid body, wherein a top surface portion of the canopy portion is formed so as to be lifted upward.
In a state where the mouth of the container is sealed, the inner surface of the lower wall where the hanging piece of the canopy is joined to the side wall portion tapered from the upper end to the lower end is joined to the inner surface of the container. 2. The lid according to claim 1, wherein the opening is in contact with the lid.
The lid according to claim 2, wherein the inner surface of the lower wall is formed with a fitting portion that fits with the mouth portion of the container.
The lid according to claim 3, wherein the fitting part is formed in a shape that fits with the curled part of a container having a curled part at the mouth.
The lid according to claim 3, wherein the fitting portion of the lower wall comprises an annular groove formed by pressing the inner surface of the lower wall.
The lid according to claim 2, wherein the inner dimension of the lower end of the lower wall is smaller than the outer dimension of the container mouth.
The lid according to claim 1, wherein the side wall is inclined at an inclination angle equal to or smaller than the inclination angle of the container wall to which the lid is attached.
The lid according to claim 1, wherein the lower end of the lower wall is attached in a non-contact state with the container wall when attached to the container mouth.
2. The side walls and the canopy are joined integrally by joining the hanging pieces of the canopy that are bent at an angle of inclination less than the angle of inclination of the side walls and joining along the inner surface of the side walls. Described lid.
2. The lid according to claim 1, wherein the upper end side of the side wall forms an upper side wall that protrudes upward from the top surface.