A lid, and a container including the lid

Abstract

Provided are a lid body that suppresses oxidation of a liquid, easily discharges bubbles and the like generated from the liquid, and enables easy stirring of the liquid, and a container including the lid body. **Solution means**: A lid body 10 floating on the liquid surface in a container, the lid body being formed by at least two or more individual sheet pieces spaced apart from each other. Preferably, the individual sheet pieces 10a and 10b are connected by a connecting member, and the individual sheet pieces are provided with openings that are at least one of a slit hole, a round hole, a polygonal hole, an elliptical hole, and an irregular hole.

Description

Technical Field

[0001] The present invention relates to a lid floating on a liquid surface and a container provided with the lid.

Background Art

[0002] Conventionally, liquids such as alcoholic beverages, soy sauce, and coffee are oxidized by the air in contact with the liquid surface when placed in a container, and the quality deteriorates. To suppress the oxidation of the liquid, for example, sealing the container can be mentioned.

[0003] However, when the liquid is drawn out of the container, the lid of the container must always be opened, and the air corresponding to the volume of the drawn-out liquid enters the container. Therefore, the liquid in the container cannot avoid oxidation. There are oxidation prevention devices by substitution with nitrogen gas and argon gas, etc., but they are expensive, and since it is necessary to replace them with these gases every time the lid is opened and closed, it is not practical. In particular, when used for food, it is difficult to use at home, etc., and the versatility is low.

[0004] Therefore, conventionally, a technique of suppressing the oxidation of a liquid by floating a lid on the liquid surface has been adopted. In order to suppress the oxidation of the liquid, from the viewpoint of suppressing the contact between the liquid and the air, it is necessary to make the distance between the end of the lid and the inner wall of the container as narrow as possible. However, if too much attention is paid only to suppressing the oxidation of the liquid, other problems will occur, and various studies have been made conventionally.

[0005] For example, as described above, if the inner wall of the container and the side surface of the lid are too close to each other, the lid will be caught by the inner wall of the container. Then, even if the container is tilted, there is a concern that the lid will not follow the liquid surface and the liquid cannot be drawn out of the container even when the container is tilted. Therefore, Patent Document 1 discloses a technique of providing a gap between the side surface of the lid and the inner wall of the container so that the lid returns to a state of floating on the liquid surface even when the container is tilted and then returned to the original state.

[0006] Also, if the distance between the end of the lid and the inner wall of the container is made as narrow as possible to suppress the oxidation of the liquid, when it is desired to put a liquid different from the liquid in the container into the container, it is necessary to introduce it into the internal liquid through the gap of the lid, and it is difficult to dispense another liquid into the internal liquid. Therefore, Patent Document 2 discloses a lid having an opening of a predetermined size in order to dispense a reagent from a liquid container and suppress the oxidation of the reagent.

[0007] Furthermore, Patent Document 3 discloses a lid in which a spiral slit is provided from the central portion to the peripheral portion of a substantially circular sheet. Since this lid is inserted into the container in an elastically stretched state, even when the mouth of the container is small, the lid can be inserted into the container.

Prior Art Documents

Patent Documents

[0008]

Patent Document 1

Patent Document 2

Patent Document 3

Summary of the Invention

Problems to be Solved by the Invention

[0009] As described above, the lids described in Patent Documents 1 to 3 focus on problems when inserting the lid into the container, and problems when the container into which the liquid is introduced is tilted or another liquid is introduced after the lid is inserted into the container, in addition to suppressing the oxidation of the liquid. However, for example, there may be a situation where it is better to float the dropping lid on the liquid surface during the fermentation of the liquid.

[0010] Also, when fermenting a liquid or the like, if the bubbles generated during fermentation remain in the liquid, the influence on fermentation is reduced. However, since it is difficult to specify the position where the bubbles float, it is better to make it easier for the bubbles to be released regardless of the position on the liquid surface from which the bubbles float.

[0011] Furthermore, it may be necessary to stir the liquid while it is fermenting. At this time, in order to suppress the oxidation of the liquid, if a lid with an area as close as possible to the area of the liquid surface floats on the liquid surface, the gap is narrow and the stirring rod cannot be inserted into the liquid. For example, when stirring a liquid introduced into a large container such as those used in wineries, it is necessary to insert the stirring rod at any location inside the container and stir evenly.

[0012] However, just providing a gap between the side surface of the lid and the inner wall of the container as in Patent Document 1 allows stirring only in the vicinity of the side surface of the container. Also, even if there is only one hole as in Patent Document 2, it is difficult to stir the entire liquid evenly. In Patent Document 3, only slits are provided, and no gap for inserting a stirring rod or the like is considered. On the other hand, if innumerable holes are provided so that bubbles can be generated from the liquid in the container or the liquid can be stirred, it is difficult to exert the liquid oxidation suppression effect. Furthermore, even when it is desired to stir an arbitrary position, if there is no hole at that location, it is impossible to stir that arbitrary location.

[0013] As described above, in the conventional lid, although suppressing the oxidation of the liquid has been considered, the situation where bubbles and the like are generated due to fermentation of the liquid has not been sufficiently considered. Also, it is not practical to remove the lid only when bubbles are generated or when the liquid is stirred. In recent years, for example, when the shipment volume of wine or the like decreases, there is a need to store while suppressing the oxidation of the liquid, and a lid that can suppress the oxidation effect and does not affect the fermentation or stirring of the liquid is desired.

[0014] An object of the present invention is to provide a lid that can suppress the oxidation of a liquid, easily release bubbles and the like generated from the liquid, and also easily stir the liquid, and a container provided with the lid.

Means for Solving the Problems

[0015] From the perspective of suppressing the oxidation of the liquid, the inventors have earnestly studied to enable the free release of bubbles whose generation positions cannot be specified on the premise that the lid is in the form of a sheet as in the prior art, and to be able to stir the liquid in the container at any stirring position.

[0016] Since all conventional lids are integrally formed, no consideration has been given to the release of bubbles from the liquid or the stirring of the liquid. Also, when the lid is integrally formed, the positions for releasing bubbles and stirring the liquid are limited. Further, as disclosed in Patent Document 3, when a lid is placed in a container with a narrow inlet, since the lid needs to return to its original shape after being inserted into the container, the lid needs to be integrally formed.

[0017] In order to be able to suppress the oxidation of the liquid, facilitate the release of bubbles generated from the liquid, and enable the stirring of the liquid at any position, the inventors came up with the idea, which is the exact opposite of the prior art, of dividing the planar lid.

[0018] For a lid having a plurality of divided individual sheets, the area of one individual sheet becomes small. For example, when bubbles are released from the liquid, the liquid surface bulges due to the buoyancy of the bubbles, and the individual sheets are likely to move away from the bubbles, so the release of bubbles is not hindered. Also, when stirring the liquid, a stirring rod can be inserted through the gaps between the plurality of individual sheets for stirring. And since each of the divided individual sheets can move freely without interference until they come into contact with each other, it is possible to stir at any position without being limited to a specific stirring location while floating the lid on the liquid. Also, if a lid having a plurality of divided individual sheets floats on the liquid surface, the oxidation of the liquid can be suppressed as well as that of the conventional lid. The present invention thus completed is as follows.

[0019] (1) A lid floating on the liquid surface in a container, wherein the lid is formed by at least two or more individual sheets being separated from each other A lid characterized by the following.

[0020] (2) The lid according to (1) above, wherein the individual sheets are connected by a connecting member.

[0021] (3) The lid according to (1) or (2) above, wherein the individual sheets are provided with an opening which is at least one of a slit hole, a round hole, a polygonal hole, an elliptical hole, and an irregular hole.

[0022] (4) The lid according to any one of (1) to (3) above, wherein the sizes of the individual sheets are substantially the same. (5) The lid according to any one of (1) to (4) above, wherein the individual sheets are formed by laminating a plurality of sheets.

[0023] (6) A container comprising the lid according to any one of (1) to (5) above.

Brief Description of the Drawings

[0024]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Modes for Carrying Out the Invention

[0025] The present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiments described in detail below, and each aspect may be combined as appropriate.

[0026] 1. Lid (1) Lid FIG. 1 is a perspective view showing an example of the lid 10 according to the present embodiment. As shown in FIG. 1, the lid 10 includes individual sheets 10a and 10b. The lid 10 may have substantially the same shape as the cross-sectional shape of the container when viewed from above.

[0027] For example, if the cross-sectional shape of the container is substantially circular, the shape of the lid 10 when viewed from above may be substantially circular as shown in FIG. 1. When the shape of the lid 10 when viewed from above is substantially the same as the cross-sectional shape of the container as in the lid 10, when the lid 10 floats on the liquid surface in the container, the gap between the inner wall of the container and the end of the lid 10 can be reduced as much as possible, so that the oxidation suppressing effect of the liquid can be more sufficiently exhibited. If the cross-section of the container is substantially rectangular, the shape of the lid 10 when viewed from above may be substantially rectangular. In the present embodiment, the shape of the lid when viewed from above does not necessarily have to conform to the cross-sectional shape of the container. For example, as shown in FIG. 2(b), it may be composed only of the individual sheet 10b.

[0028] The individual sheets 10a and 10b constituting the lid 10 are separated from each other and float on the liquid surface. For example, when bubbles rise from the liquid in the container to the liquid surface, the individual sheets 10a and 10b move in a direction away from the bubbles according to the buoyancy of the bubbles. Therefore, even if the lid 10 floats on the liquid surface, the release of bubbles is not hindered.

[0029] In this way, the lid body 10 is formed such that the individual sheets 10a and 10b are spaced apart from each other. When the liquid level rises due to the floating of bubbles or the like, the adjacent individual sheets 10a and 10b can move until they come into contact with each other without interfering with each other. In reality, although the position where bubbles float cannot be specified, the individual sheets 10a and 10b move in a direction away from the bubbles according to the buoyancy of the bubbles. Therefore, regardless of the floating position of the bubbles, the bubbles can be released from the liquid surface.

[0030] Also, for example, when stirring the liquid in the container with a stirring rod or the like, the individual sheets 10a and 10b at or near the position to be stirred can be moved, and the stirring rod can be inserted into the liquid and stirred. Some conventional lid bodies are provided with holes, but these holes are through-holes in the lid body, and the positions of the holes are fixed. Therefore, even when the holes are large enough to allow the stirring rod to be inserted, the rod has to be inserted and stirred only through the holes provided in the lid body. Therefore, in the case of stirring the liquid introduced into a large container used in a winery or the like, it was not possible to uniformly stir the liquid with the conventional lid body floating on the liquid surface.

[0031] On the other hand, as described above, the lid body 10 according to the present embodiment is formed such that the individual sheets are spaced apart from each other. Therefore, the liquid in the container can be stirred by inserting a stirring rod at the place to be stirred. Also, since the individual sheets 10a and 10b can move freely without interfering with each other until they come into contact with each other, the stirring rod can move freely while the lid body 10 is floating. Therefore, for example, even when the liquid in the container has a certain degree of viscosity, uniform stirring can be performed because the stirring position is hardly restricted.

[0032] Accordingly, as described above, even when bubbles float from the liquid, the individual sheets 10a and 10b automatically move according to the floating position. Therefore, the release of bubbles is not inhibited, and the fermentation of the liquid or the like is not inhibited.

[0033] (2) Individual sheets As shown in FIG. 1, the lid 10 according to the present invention includes a plurality of individual sheets 10a and 10b. FIG. 2 is a perspective view separately showing the outer individual sheet 10a and the inner individual sheet 10b constituting the lid 10 shown in FIG. 1. FIG. 2(a) is an aggregate of the outer individual sheets 10a, and FIG. 2(b) is an aggregate of the inner individual sheets 10b.

[0034] The individual sheet 10a is provided to fill the gap between the inner wall of the container and the lid 10. Thereby, the oxidation of the liquid can be more sufficiently prevented. The shape of the individual sheet 10a is not particularly limited as long as it fills the outer peripheral portion when determining the overall shape of the lid 10. It may be amorphous as shown in FIG. 2(a).

[0035] In addition, for example, in the case of the lid 10 shown in FIG. 1, the individual sheet 10a may be the remainder after separating the individual sheet 10b having the same size and shape from a circular sheet obtained by cutting the sheet into the substantially cross-sectional shape of the container. In this case, the shape of the individual sheet 10a becomes amorphous. Also, the individual sheet 10a may be integral, but preferably may be composed of a plurality of individual sheets 10a as shown in FIG. 2(a).

[0036] The individual sheet 10b may be formed by separating individual sheets 10b having the same size and shape from a sheet having the substantially cross-sectional shape of the container as shown in FIGS. 1 and 2(b). Even without the individual sheet 10a, the liquid is not instantaneously oxidized, but the presence of the individual sheet 10a has a higher effect of suppressing the oxidation of the liquid.

[0037] Also, the individual sheets 10b preferably have the same size and shape. Thereby, it is easy to put into a container with a small mouth, promotes cost reduction, and is further easy to replace, so it has high versatility. However, in order to exhibit the effects of the present embodiment, it is not necessarily required to have the same size or shape. It may have a random shape or different sizes.

[0038] The shape of the individual sheet 10b may be irregular. In this case, since the gap between each individual sheet 10b widens and the movement range of the individual sheet 10b increases, the degree of freedom in discharging bubbles and the stirring position improves. On the other hand, since the gap increases, although the oxidation suppression effect is slightly inferior, the oxidation suppression effect is not a problem in practical use.

[0039] The individual sheets 10b may have random areas and shapes, may have different areas and substantially the same shape, or may have the same area and different shapes. If the area and shape are in such a relationship, the discharge of bubbles is not inhibited, and the degree of freedom in the stirring position improves. For example, pentagons and hexagons may be alternately arranged.

[0040] It is preferable that the individual sheets 10b have substantially the same area and shape. Like the individual sheets 10b shown in FIGS. 1 and 2(b), if the individual sheets 10b have the same area and shape, they have high versatility, can suppress the manufacturing cost, and can reduce the gap as much as possible.

[0041] The shape of the individual sheet 10b is not particularly limited, such as polygons such as triangles and quadrilaterals, circles, ellipses, etc. However, when a higher oxidation suppression effect is required, it is preferably a triangle to a hexagon. The number of individual sheets 10b may be two or more. Considering the degree of freedom in discharging bubbles and stirring, four or more are preferable, six or more are more preferable, and ten or more are even more preferable. On the other hand, the upper limit is not particularly limited, but it may be 30 divisions or less from the viewpoint of the oxidation suppression effect.

[0042] If the area of the individual sheet 10b is too small, the area covering the liquid surface becomes small. Therefore, in order for the oxidation suppression effect to be sufficiently exhibited, it may be 1 cm 2 or more, but it may be appropriately adjusted according to the cross-sectional area and the number of the containers.

[0043] The thicknesses of the individual sheets 10a and 10b are not particularly limited, but even when the lid of the container is small, for example, if the film thickness is such that the sheet can be rolled up, the lid of the container can be opened and inserted into the container. If the thickness is appropriate, adhesion to the side walls and bottom surface of the container due to surface tension is suppressed. When inserting the lid into a container with a small lid, a soft material is preferable.

[0044] The individual sheets 10a and 10b require a certain degree of high buoyancy. In order to obtain such buoyancy, it is preferable to select a material with a specific gravity smaller than that of the liquid (such as water or alcohol) in the container, for example. For example, conventionally used materials such as polyethylene, polypropylene, and polyethylene terephthalate may be used, and polyethylene terephthalate is preferable from the viewpoints of heat resistance, cold resistance, transparency, water resistance, etc.

[0045] As shown in FIG. 1, when the lid 10 is substantially the same as the cross-sectional shape of the container when viewed from above, the distance between the end of the lid 10, that is, the end of the individual sheet 10a and the side wall of the container, may be about 0.3 to 3.0 mm. If it is within this range, when the container is tilted and then returned to its original state, the individual sheets 10a and 10b will not be caught on the side wall of the container and will return to a horizontal state similar to the liquid surface.

[0046] The ratio of the area of the lid 10 covering the liquid surface to the area of the liquid surface ((area of the lid ÷ area of the liquid surface) × 100) is preferably 70 to 99% and more preferably 80 to 95% from the viewpoint of suppressing oxidation of the liquid.

[0047] At least one of the individual sheets 10a and 10b constituting the lid 10 may be provided with an opening. The shape of the opening is not particularly limited, but may be at least one of a slit hole, a round hole, a polygonal hole, an elliptical hole, and an irregular hole. The slit-shaped opening may be provided simply by making a cut with a cutter or the like, and includes a linear opening without a gap. Round holes and the like and slit-shaped holes may be mixed. Note that the "area of the lid" refers to the area including the opening when the individual sheets 10a and 10b are provided with an opening.

[0048] Also, the individual sheets 10a and 10b may be laminated in two or more layers. When laminated in two or more layers, at least one of the top layer or the bottom layer may be provided with an opening. In the case of three or more layers, the intermediate layer may also be provided with an opening. Even in a situation where the individual sheets 10a and 10b do not move when the bubbles rise and stay at the lower part of each, the bubbles are discharged onto the liquid surface through the openings. Specifically, when the bubbles enter the openings due to surface tension, since the intermolecular force between water molecules is greater than the intermolecular force between water and air molecules, it is presumed that the bubbles are discharged above the liquid surface through the ends of the individual sheets 10a and 10b from the openings due to capillary action.

[0049] Since the lid 10 is used floating on the liquid surface introduced into the container described later, the individual sheets 10a and 10b constituting the lid 10 do not need to be physically joined to each other. Also, as described above, even when the individual sheets 10a and 10b are composed of two or more layers, each layer only needs to be laminated by the surface tension of the liquid. Therefore, each layer does not need to be physically joined. Even when the individual sheets 10a and 10b are laminated, the individual sheets 10a and 10b are separated from each other.

[0050] When the individual sheets 10a and 10b are multiple layers, since each of the individual sheets 10a and 10b itself has sufficient buoyancy, by simply stacking at least two sheets, the retention of liquid pools and air pools can be suppressed by utilizing capillary action.

[0051] In addition, when the individual sheets 10a and 10b have openings and a plurality of individual sheets 10a and 10b are stacked, the openings may or may not be located at positions penetrating the lowermost layer and the uppermost layer. Therefore, even when the individual sheets 10a and 10b have a large number of openings, sufficient buoyancy can be obtained and the retention of bubbles can be suppressed by capillary action. When the individual sheets 10a and 10b have openings, it is preferable that the density of the openings is provided in each sheet so that the area distribution of the openings is uniform.

[0052] Furthermore, when the individual sheets 10a and 10b have openings, the area ratio of the openings, which is the ratio of the sheet area to the total area of the openings, may be about 0.5 to 40%. As described above, the shapes of the openings are various. For this reason, the area ratio of the openings is obtained with the diameter of the openings as the equivalent circle diameter of the openings. The equivalent circle diameter is the length of the longest part of the opening as the equivalent circle diameter. For example, in the case of an ellipse, the major axis becomes the equivalent circle diameter. Also, when there are openings with various equivalent circle diameters, the frequency distribution of the equivalent circle diameters is obtained, each equivalent circle diameter is multiplied by the frequency of the equivalent circle diameter, and the sum of the multiplied results is divided by the total of the frequencies to obtain the average of the equivalent circle diameters.

[0053] 2. Another form of the lid FIG. 3 is a perspective view showing an example of the lid according to the present embodiment. The lid 20 is the same as that in FIG. 2(b) and is the part excluding FIGS. 1 to 2(a). Thus, it may be composed of only the inner individual sheet 20b without the outer individual sheet. Although the area of the lid 20 covering the liquid surface is slightly narrower than that of the lid 10 shown in FIG. 1, the operating area of the individual sheet 20b is wide. For this reason, when the bubbles rise, the individual sheet 20b is easily moved by the buoyancy of the bubbles, and the release of the bubbles is not hindered. Also, the liquid in the container can be stirred while moving the individual sheet 20b with a stirring rod. Therefore, the liquid in the container can be uniformly stirred while floating the lid 20.

[0054] Note that although FIG. 3 is the same as FIG. 2(b), when bubbles frequently occur or when the liquid is frequently stirred, the number of individual sheets 20b may be reduced. On the other hand, in order to further enhance the oxidation suppression effect, the interval between the individual sheets 20b may be narrowed and the number of individual sheets 20b may be increased. Also, even if the area of the individual sheets 20b is increased and the number is reduced, the oxidation suppression effect is improved.

[0055] 3. Another form of the lid FIG. 4 is a perspective view showing an example of the lid 30 according to the present embodiment, and is a perspective view showing an example of a lid in which each individual sheet 30b is connected by a connecting member 30c. As shown in FIG. 4, each individual sheet 30b may each be provided with an opening 30b-1 and may be connected by a connecting member 30c via the opening 30b-1.

[0056] The longer the length of the connecting member 30c, the higher the degree of freedom of movement of the individual sheets 30b, so it does not impair the degree of freedom of bubble release or stirring. Also, when each individual sheet 30b is connected by a connecting member 30c, for example, even if the lid 30 is pre-placed in an empty container and then the liquid is introduced into the container, the lid 30 can float on the liquid surface while maintaining a certain positional relationship of the individual sheets 30b so as to cover the liquid surface.

[0057] The opening 30b-1 may also serve as the aforementioned opening. Also, apart from the aforementioned opening, in order to connect the individual sheets 30b, as shown in FIG. 4, holes provided at the corners of each individual sheet 30b may be used. Note that not all of the openings 30b-1 need to be used for connection. As long as the individual sheets 30b can maintain their relative positional relationships, it is better to minimize the locations connected by the connecting member 30c. The individual sheets 30b only need to be connected via at least one opening. This is because it improves the degree of freedom of movement of the individual sheets 30b during bubble release and stirring.

[0058] The material of the connecting member 30c may be the same as that of the individual sheet 30b so as not to affect foods or the like. The connecting member 30c preferably connects the individual sheet 30b through the opening 30b-1 with the closest distance. In this case, the length of the connecting member 30c may be about 1.5 to 8 times the interval between the openings 30b-1. Within this range, the degree of freedom of movement of the individual sheet 30b is maintained. Note that the length of the connecting member 30c in the present embodiment represents the length of the connecting member 30c after connecting the openings 30b-1, as represented by L in FIG. 4. If the connecting member 30c is in a string shape as shown in FIG. 4, for example, the individual sheet 30c can be connected regardless of the shape of the opening.

[0059] 4. Usage form of the lid FIG. 5 is a perspective view showing a state in which the lid 10 according to the present embodiment floats on the liquid surface in the container. The lid 10 floats on the liquid surface 13 of the liquid 14 contained in the container 12. When bubbles rise from the inside of the liquid 14 due to fermentation of the liquid 14 or the like, the individual sheets 10a and 10b move away from the bubbles by the buoyancy of the bubbles until the adjacent individual sheets 10a and 10b come into contact with each other and / or until the individual sheet 10a comes into contact with the inner wall of the container. Therefore, the freedom of releasing and stirring the bubbles is not hindered.

[0060] Since the outer individual sheet 10a can move to the inner wall of the container 12, the individual sheets 10a and 10b can move freely within a wide range of movement. Therefore, a stirring rod (not shown) can be inserted into the liquid 14 at an arbitrary stirring position, and even if the container 12 is a large-capacity container used in a wine cellar or the like, the liquid 14 can be uniformly stirred while floating the lid 10.

[0061] 5. Manufacturing method of the lid The manufacturing method of the lid 10 according to the present invention includes a step of processing a sheet material into a predetermined shape and then cutting it into individual sheets 10a and 10b. In the case of the lid 20 composed of individual sheets 20b having the same shape and the same area, the shape of the individual sheets 20b may be efficiently cut out from the sheet material. When openings are provided in the individual sheets 10a and 10b, holes may be punched with a punch. Further, the slit-shaped opening may be provided by making a cut in the sheet material with a cutter or the like.

[0062] 6. Container The container according to the present invention includes the lid according to the present embodiment. The container is not particularly limited and may be various liquid containers such as a large cylindrical container used in brewing, a soy sauce dispenser, a wine bottle, and a one-liter bottle. The shape of the lid according to the present embodiment may be appropriately adjusted according to the cross-sectional shape of the container. The material of the side wall of the container may also be a conventionally used one and is not particularly limited, such as PET, glass, or stainless steel.

[0063] Further, the container according to the present invention is not limited to those containing liquid and also includes those not containing liquid. The shape of the container 12 may be substantially cylindrical as shown in FIG. 5, and the shape of the opening and the cross-sectional shape of the container may be substantially the same. In the case of a container having a large opening as shown in FIG. 5, the lid 10 can be easily and neatly arranged on the liquid surface 13.

Explanation of Reference Numerals

[0064] 10, 20, 30 Lids 10a (outer) individual sheet 10b, 20b, 30b (inner) individual sheets 12 Container 13 Liquid surface 14 Liquid 30b-1 Opening 30c Connecting member

Claims

1. A lid body that floats on the liquid surface in a container having a substantially circular cross-sectional shape, The lid body is composed of an assembly of inner individual sheets and an outer individual sheet of irregular shape provided in a gap between the assembly of inner individual sheets and an inner wall of the container, When viewed from the top surface of the lid, the individual sheets constituting the assembly of the inner individual sheets and the outer individual sheets are spaced apart from each other, The individual sheets constituting the assembly of the inner individual sheets are connected to each other via connecting members, The outer sheet is disposed outside the assembly of the inner sheets, and when viewed from the top surface of the lid, the shape of the lid is approximately the cross-sectional shape of the container. A lid body characterized by:

2. The lid body according to claim 1 , wherein at least one of the outer individual sheet and the assembly of the inner individual sheet has an opening which is at least one of a slit hole, a round hole, a polygonal hole, an elliptical hole, and an irregular hole.

3. A lid body as described in claim 1 or 2, wherein the outer individual sheet is integral or is composed of multiple outer individual sheets.

4. The lid according to claim 1 or 2, wherein at least one of the outer individual sheet assembly and the inner individual sheet assembly is formed by laminating a plurality of sheets.

5. A container comprising the lid according to claim 1 or 2.

6. The lid according to claim 3 , wherein at least one of the outer individual sheet assembly and the inner individual sheet assembly is formed by laminating a plurality of sheets.

7. A container comprising the lid according to claim 3.

8. A container comprising the lid according to claim 4.

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