Paper-made lid and lidded container

Abstract

To provide a lidded container capable of suppressing a liquid leak due to a step gap.SOLUTION: A paper-made lid 6 is adaptively fitted to a container 1 which has a curled flange 4. The paper-made lid 6 comprises a lid body part 7, a plurality of lock mechanisms 10, 31 and 32 provided at an outer periphery of the lid body part 7 and locked to the curled flange 4, and a drinking spout part 50 provided between the one lock mechanism 10 and the adjacent lock mechanism 31. The lock mechanism 10 consists of a flap part 11 extended outward from the lid body part 7 in a blank state, a protrusion cutting line 12 provided to the flap part 11 to protrude toward the lid body part 7, and left and right cutting lines 13, 14 for folding provided straddling the protrusion cutting line 12 along a position corresponding to the curled flange 4.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a lid for a container, and more particularly to a paper lid for a container having a curled flange. [Background technology]

[0002] It is preferable that containers for beverages or liquid foods have lids. For example, at convenience stores and coffee chains, coffee is poured into paper containers, which are then covered with plastic lids for takeaway. Plastic lids also make it easy to form a drinking spout (for example, Patent Document 1).

[0003] In recent years, there has been a trend toward paper containers being preferred over plastic containers from the viewpoint of environmental consideration, and paper lids have also been considered as an alternative to plastic lids (for example, Patent Document 2). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2018-065598 A [Patent Document 2] Patent No. 3432316 Summary of the Invention [Problem to be solved by the invention]

[0005] However, while resin is easy to process and can be molded into complex shapes, such as three-dimensional shapes, and various functions can be added to resin lids, such as opening and closing the mouth and locking functions, paper is not as easy to process as resin, and there are limitations to the shapes that can be molded, as well as the functions that can be added to paper lids. As a result, paper lids are not as commonly used as resin lids.

[0006] On the other hand, even though they do not have the same functionality as plastic lids, there is demand for simple paper lids, such as those used when carrying coffee from a conference room to your desk in the office.

[0007] The present invention is intended to solve the above problems, and aims to provide a paper lid that has a simple structure and multiple functions. [Means for solving the problem]

[0008] The paper lid of the present invention, which is for achieving the above object, corresponds to a container having a curled flange. The paper lid includes a lid body, a plurality of locking mechanisms provided on the outer periphery of the lid body and locked to the curled flange, and a drinking spout provided between one locking mechanism and an adjacent locking mechanism.

[0009] This allows the paper lid to have both a locking function and a drinking spout function, and in particular prevents the lid from coming off when the drinking spout is opened or closed.

[0010] In the above invention, preferably, the locking mechanism comprises, in a blank state, a flap portion extending outward from the lid main body portion, a convex cut line provided on the flap portion so as to be convex toward the lid main body portion, and left and right folding cut lines provided along a position corresponding to the curled flange and spanning the convex cut line.

[0011] This makes it possible to realize the locking function with a simple configuration of one blank.

[0012] In the above invention, preferably, in the locking mechanism, in a locked state, the flap portion is rotated downward around both ends of the left and right folding cut lines as axes, the apex of the convex portion formed by the convex cut line is positioned below the curled flange to form a first locking portion, and the upper both ends of the flap portion abut against the side surfaces of the curled flange to form a second locking portion.

[0013] This makes it difficult for it to come off even if an external force is applied from any direction.

[0014] In the above invention, preferably, the lid body has an outer periphery provided with cutout portions cut toward the center of the lid body adjacent to both ends of the folding cut line.

[0015] This reduces the sharp edges that occur when the locking mechanism is formed, making it easier to hold and carry the container without feeling uncomfortable.

[0016] In the above invention, preferably, the locking mechanism is provided at three locations.

[0017] The number of locking mechanisms is preferably 2 to 4, and particularly preferably 3. When the locking mechanism is in three places, a good balance can be achieved between ease of installation, stability (difficulty in coming off), and securing the drinking spout size.

[0018] In the above invention, preferably, the central angle formed by the center of the first locking mechanism and the center of the second locking mechanism on the outer circumference is larger than the central angle formed by the center of the first locking mechanism and the center of the third locking mechanism and the central angle formed by the center of the second locking mechanism and the center of the third locking mechanism, and the drinking spout is located between the first locking mechanism and the second locking mechanism.

[0019] This allows a relatively large mouth size to be ensured.

[0020] In the above invention, preferably, the drinking spout portion comprises a pivot axis provided in the center of the lid main body portion, an opening / closing portion that enables the drinking spout to be opened and closed via the pivot axis, a knob portion provided distal to the opening / closing portion, and a hooking cut line provided on the knob portion, and the hooking portion formed by the hooking cut line can be hooked to a corresponding portion of the curled flange when the drinking spout is closed, and can be hooked to a symmetrical portion of the curled flange when the drinking spout is open.

[0021] This makes it possible to realize the opening and closing function of the drinking spout using a simple structure consisting of a single blank.

[0022] In order to achieve the above object, the present invention provides a container with a lid, comprising the above-described paper lid and a container having a curled flange.

[0023] This allows the locking function and the drinking spout function to be achieved with a simple configuration. Effect of the Invention

[0024] The paper lid of the present invention can add multiple functions to the paper lid with a simple structure.

[0025] The paper lid of the present invention can be easily attached to a container with one hand and is also difficult to come off.

[0026] The paper lid of the present invention allows the user to drink from the bottle with the lid on, and the opening is also difficult to come off when opening the bottle. [Brief description of the drawings]

[0027] [Figure 1] Overall structure of the lid [Diagram 2] Diagram of the lock mechanism in the blank state [Diagram 3] Configuration diagram of the locking mechanism in the locked state [Figure 4] Configuration diagram of the locking mechanism in the locked state [Diagram 5] Configuration diagram of the mouth part in blank state [Figure 6] Operational diagram for attaching the lid [Figure 7] Explanation of the operation of opening and closing the drinking spout [Figure 8] Configuration diagram according to a comparative example [Figure 9] Diagram showing an example of uneven placement [Figure 10] Conceptual diagram of the conditions for the top of the convex part to be in the appropriate position [Figure 11] Configuration diagram of a modified example DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0028] ~Schematic configuration~ The container with lid consists of a container 1 and a lid 6. The container 1 is made of paper, which is generally laminated. The container 1 has a bottom 2 (not shown), a body 3, and a flange 4. The bottom 2 is circular in plan view. The body 3 is roughly in the shape of an inverted truncated cone in side view, and stands upright from the bottom 2. The flange 4 is formed in a curled shape at the upper end of the body 3.

[0029] The body 3 is formed by overlapping both ends of a roughly fan-shaped paper blank. A roughly circular opening (numbering omitted) is formed at the top end of the body 3. A blank-shaped lid 6 is folded and fitted onto the flange portion 4 to close the opening (see FIG. 6 described later).

[0030] In this embodiment, the container 1 is made of paper, but it may be a resin container as long as it has a curled flange 4.

[0031] The lid 6 is made of paper. A blank is cut out from the template. It may be laminated.

[0032] 1 is a diagram showing the overall configuration of the lid 6. The lid 6 is characterized by comprising a lid main body 7, a plurality of locking mechanisms 10, 31, 32, 33, and a drinking spout 50.

[0033] The lid body 7 is the main part of the lid, and has a shape (generally circular) that corresponds to the opening formed by the container flange 4.

[0034] Fig. 1A shows two locking mechanisms. Fig. 1B shows three locking mechanisms. Fig. 1C shows four locking mechanisms. Five or more locking mechanisms may be used, but two to four are preferred in consideration of installation work.

[0035] The drinking spout 50 is provided between one locking mechanism 10 and the adjacent locking mechanism 31.

[0036] When there are two locking mechanisms, the lock is somewhat more easily released when opening the drinking spout 50 than when there are three locking mechanisms.

[0037] When there are four locking mechanisms, it is more difficult to ensure the size of the drinking spout 50 than when there are three locking mechanisms. Also, it is somewhat difficult to attach the lid with one hand.

[0038] When there are three locking mechanisms, the container is easy to attach with one hand, and the lock is not easily released when opening the drinking spout 50. In addition, a relatively large size of the drinking spout 50 can be ensured. In this way, the balance is good. The case where there are three locking mechanisms will be described below.

[0039] ~Lock mechanism configuration~ FIG. 2 is a diagram showing the configuration of the lock mechanism 10 in the blank state.

[0040] The locking mechanism 10 is provided on the outer periphery of the lid body 7. The locking mechanism 10 is composed of a flap portion 11, a convex cut line 12, folding cut lines 13, 14, connection portions 15, 16, and notches 17, 18.

[0041] The flap portion 11 extends outward along a circular arc from the lid body portion 7. As a result of the three flaps being extended, the blank has a generally triangular shape.

[0042] The convex cut line 12 is provided on the flap portion 11 so as to be convex toward the lid body portion 7. The detailed shape of the convex shape is not limited, but in the illustrated example, it is an arc. Also, in the illustrated example, small arcs (numbering omitted) are formed so as to continue to both ends of the arc. The top of the convex shape bites into the lid body portion 7 side.

[0043] The folding score lines 13 and 14 are provided on the left and right sides along a position corresponding to the container flange portion 4 so as to straddle the convex score line 12 .

[0044] It is preferable that the position corresponding to the container flange portion 4 coincides with the arc formed by the curled top of the container flange portion 4, but some inward or outward deviation (offset) is acceptable as long as it is within twice the curl diameter.

[0045] One end of the folding score line 13 is continuous with the convex score line 12, while the other end is adjacent to the connection portion 15. One end of the folding score line 14 is continuous with the convex score line 12, while the other end is adjacent to the connection portion 16.

[0046] The connection parts 15 and 16 are provided on the proximal sides of both ends of the flap part 11. The lid main body part 7 and the flap part 11 are cut off along the convex cut line 12 and the folding cut lines 13 and 14, but are continuous through the connection parts 15 and 16.

[0047] The notch 17 is provided on the opposite side of the end of the bending cut line 13 of the connection part 15, so as to be slightly cut out on the outer periphery of the lid main body part 7 toward the center of the lid main body part 7. The notch 18 is provided on the opposite side of the end of the bending cut line 14 of the connection part 16, so as to be slightly cut out on the outer periphery of the lid main body part 7 toward the center of the lid main body part 7. The shape of the cutout is not limited, but is an arc in the illustrated example.

[0048] Figures 3 and 4 are diagrams showing the configuration of the lock mechanism 10 in a locked state. Figure 3 is a partially cutaway perspective view showing a cross section of the container 1. Figure 4 is a side view.

[0049] The locking mechanism 10 is made up of a first locking portion 21 and second locking portions 22, 22.

[0050] The flap portion 11 can be rotated downward about the line connecting the connecting portions 15, 16. The lid main body portion 7 and the flap portion 11 are separated at the folding cut lines 13, .

[0051] As the flap portion 11 rotates, a convex portion 23 is formed via the convex cut line 12, and the convex portion 23 moves while pressing against the curled shape of the container flange portion 4. When the top of the convex portion 23 is positioned on the underside of the curled shape of the container flange portion 4, a first locking portion 21 is formed, and the elasticity of the connecting portions 15, 16 causes the top of the convex portion 23 to push up the curled underside of the container flange portion 4.

[0052] In addition, as the flap portion 11 rotates, the connection portions 15, 16 are positioned above the flap portion 11 and abut against the curled side of the container flange portion 4, forming second locking portions 22, 22, and the elasticity of the connection portions 15, 16 causes the connection portions 15, 16 to push into the curled side of the container flange portion 4.

[0053] At this time, the connecting portions 15 and 16 are bent, the paper is deformed, and becomes angular, but the notched portions 17 and 18 reduce the occurrence of the angularity.

[0054] In addition, the convex cut line 12 below the folding cut lines 13, 14 and the cutouts 17, 18 make both end regions of the flap portion 11 more easily deformable, and the connecting portions 15, 16 more easily deform along the container flange portion 4. This reinforces the function of the second locking portions 22, 22.

[0055] ~Drinking mouth configuration~ FIG. 5 is a diagram showing the configuration of the drinking spout portion 50 in a blank state.

[0056] The drinking spout portion 50 is composed of a rotating shaft 51, an opening / closing portion 52, a grip portion 53, and a cut line 54 for fastening.

[0057] The rotation axis 51 is provided in the center of the lid main body 7. Specifically, cut lines are provided from both ends of the position corresponding to the rotation axis 51 toward the outer edge, and the line connecting the ends of the two cut lines forms the rotation axis 51.

[0058] The opening / closing portion 52 is formed by a rotating shaft 51 and two cut lines, and allows the drinking spout 56 to be opened and closed via the rotating shaft 51.

[0059] The opening / closing portion 52 extends outward from the center of the lid body 7 , and the knob portion 53 is provided distal to the opening / closing portion 52 .

[0060] The hooking cut line 54 is provided on the knob portion 53. In the illustrated example, the cut line is an arc that protrudes toward the lid main body portion 7.

[0061] When the tab 53 is pulled, a slit is formed along the hooking cut line 54. The container flange 4 is inserted into the slit, thereby forming a hook portion 55.

[0062] ~Operation~ The characteristic operations of the present application, ie, the lid attachment operation and the opening and closing operation of the drinking spout, will now be described.

[0063] FIG. 6 is an explanatory diagram of the operation involved in attaching the lid.

[0064] The lid 6 is placed in a blank state so as to cover the opening of the container 1. Then, the blank is grasped with one hand. For example, the flap portion of the locking mechanism 31 is grasped with the thumb, the flap portion of the locking mechanism 10 with the index finger, and the flap portion of the locking mechanism 32 with the ring finger.

[0065] Since each locking mechanism is provided with a folding cut line, the flap portion rotates with only a light push of a finger, the locking mechanism is activated, and the lid 6 is securely attached to the container 1.

[0066] When the blank is held in one hand, the mouth portion 50 is between the thumb and index finger, no force is applied, and the mouth portion 50 remains flat.

[0067] This is a one-handed operation, so you can use your other hand to do something else, for example, attach the lid while carrying luggage or using your mobile phone.

[0068] Furthermore, the cutouts 17 and 18 reduce the angularity, so that the container can be carried without discomfort even when held in its closed position.

[0069] FIG. 7 is an explanatory diagram of the operation of opening and closing the drinking spout.

[0070] Immediately after the lid is attached, the drinking spout portion 50 remains flat and closes the container opening.

[0071] Opening / closing part 52 is folded back via pivot shaft 51, and when spout 56 is open, hooking part 55 is hooked onto container flange 4, which is in a position symmetrical to the initial position. This ensures that opening 56 is formed reliably, and the mouth does not come into contact with opening / closing part 52, allowing the user to drink a beverage without discomfort.

[0072] When drinking is to be stopped, the opening 56 is closed again. When the drinking spout 56 is in the closed state, the hook portion 55 is hooked to a corresponding portion of the flange portion 4 of the container.

[0073] The hook portion 55 allows the drinking spout to be repeatedly opened and closed multiple times.

[0074] Since the rotation shaft 51 is located at the center of the lid main body 7, the latch part 55 functions both in the open state and in the closed state.

[0075] ~Effects~ 8 is a diagram showing an example of the configuration of a paper lid and a container with a lid according to a comparative example of the present application. The effects of the present application will be described by comparing the examples of the present application with the comparative example of the present application.

[0076] The comparative example of this application is a simplification of a commercially available product. The comparative example lid is in a blank state and is a substantially square shape that includes the container opening. A pair of locking mechanisms are formed at the diagonal corners of the square. For example, a locking mechanism for a 7-ounce container and a locking mechanism for a 9-ounce container are formed, respectively. Specifically, each is a pair of cuts, the blank diagonal is pulled, a pair of slits are formed at the cut locations, and a container flange is inserted into the slits to form the locking mechanism.

[0077] The effects common to the comparative examples and the examples of the present application will be described.

[0078] Both the comparative example and the example of the present application can be easily formed from a single blank, and stacking a plurality of blanks does not increase the bulk, facilitating inventory management.

[0079] In both the comparative example and the example of the present application, the container opening can be easily sealed, and the intrusion of dust and splashes can be prevented.

[0080] In both the comparative example and the example of the present application, the slit formed near the locking mechanism functions as an incense window, and also makes it possible to immediately call attention to the non-sealed state.

[0081] The advantageous effects of the present embodiment compared to the comparative example will be described.

[0082] The comparative example of the present application has a minimal locking mechanism. In contrast, the embodiment of the present application can add multiple functions to the paper lid 6 with a simple structure. Specifically, a locking function and a function for opening and closing the drinking spout are added.

[0083] The locking mechanism of the comparative example requires two-handed operation because it is formed by pulling diagonally. In contrast, the locking mechanism of the embodiment of the present invention can be formed with one hand because it is only required to grip with three fingers. In other words, it can be easily attached to the container with one hand.

[0084] There is no way to confirm whether the locking mechanism of the comparative example of the present application is working properly. In contrast, in the present embodiment, the locking mechanism can be confirmed to be working properly by the touch and sound produced when the convex portion 23 overcomes the curl of the container flange portion 4.

[0085] The locking mechanism in the comparative example of the present application is simply a slit insertion, and is easily removed. Note that the comparative example of the present application does not have the technical idea of ​​a drinking spout, and is intentionally made easy to remove, so that the bottle can be drunk by removing the lid. In contrast, the locking mechanism in the embodiment of the present application is difficult to remove even when an external force acts from any direction, due to the first locking part 21 that resists upward external forces and the second locking parts 22, 22 that resist horizontal external forces.

[0086] In particular, the two second locking parts 22, 22 on both the left and right ends of the locking mechanism face slightly different directions in the horizontal plane, which makes them less likely to come off even if an external force is applied from any direction.

[0087] Furthermore, when there are three locking mechanisms, even if an external force is applied from any direction, one of the locking mechanisms will surely function, making it difficult to come off.

[0088] The comparative example of the present application does not have the technical idea of ​​a drinking spout, and the drink can be consumed by removing the lid. The action of removing the lid is troublesome. In addition, when the contents are hot coffee, etc., water droplets may form on the back of the lid, and when the lid is removed, the water droplets may spread to the surroundings. In addition, when drinking is stopped, the action of reattaching the lid is troublesome. In addition, reattaching the lid may be felt as unsanitary.

[0089] In contrast, the embodiment of the present application is provided with a drinking spout 50, and by opening the drinking spout 56, it is possible to drink from the bottle with the lid on. When drinking is stopped, the drinking spout 56 is closed and can be closed again.

[0090] The comparative example of the present application does not have the technical idea of ​​a drinking spout, and therefore does not have any problems associated with providing a drinking spout. In contrast, the embodiment of the present application has problems associated with providing a drinking spout 50. When the knob 53 is pulled up, the opening / closing part 52 opens the drinking spout 56 via the pivot 51. At this time, the lid 6 is subjected to an external force in the upward direction and an external force in the horizontal direction. As a result, the lid 6 may become easily removed.

[0091] In this embodiment, the first locking portion 21 resists an upward external force, and the second locking portions 22, 22 resist a horizontal external force. As a result, even when the spout is opened, the lid 6 is not easily removed.

[0092] ~Additional Consideration 1~ From the viewpoint of ease of installation, it is preferable that there are two to four locking mechanisms, and from the viewpoint of a balance between ease of installation, stability (difficulty in coming off), and securing the drinking spout size, it is even more preferable that there are three locking mechanisms.

[0093] When there are three locking mechanisms, they may be arranged evenly in the circumferential direction (central angle of 120 degrees), but they may also be arranged unevenly.

[0094] FIG. 9 is a diagram showing an example of a non-uniform arrangement.

[0095] On the outer periphery, the central angle of the arc formed by the centers of locking mechanisms 10 and 31 is 140 degrees. The central angle of the arc formed by the centers of locking mechanisms 31 and 32 is 110 degrees. The central angle of the arc formed by the centers of locking mechanisms 32 and 10 is 110 degrees.

[0096] The drinking spout 50 is provided between the centers of the locking mechanisms 10 and 31, which have a larger central angle. This makes it easier to ensure the size of the drinking spout compared to an even arrangement.

[0097] However, if the central angle of the arc formed by the centers of locking mechanisms 10 and 31 exceeds 180 degrees, the balance of the arrangement of locking mechanisms 10, 31, and 32 will be extremely poor, the lid will come off, and it will be difficult to attach with one hand. Therefore, it is preferable that the central angle of the arc formed by the centers of locking mechanisms 10 and 31 is greater than 120 degrees and less than 180 degrees.

[0098] ~Additional Consideration 2~ In this embodiment, it is important that the flap portion 11 rotates so that the top of the convex portion 23 is appropriately positioned on the curled underside of the container flange portion 4 .

[0099] 10 is a conceptual diagram showing the conditions under which the top of the convex portion 23 is appropriately positioned on the curled underside of the container flange portion 4. For the numbering, refer to the numbering in FIGS.

[0100] In order for the top of the convex portion 23 to be properly positioned on the curled underside of the container flange portion 4, it is important that the convex top of the convex cut line 12 is embedded closer to the lid main body portion 7 than the folding cut lines 13, 14.

[0101] The biting amount is preferably 0 to less than 3 times the curl diameter of the container flange 4. More preferably, it is more than 0 to 2 times. Under these conditions, the top of the convex portion 23 is appropriately positioned under the curl of the container flange 4.

[0102] If it is less than 0 times (i.e., it does not bite into), even if the flap portion 11 rotates, the top of the convex portion 23 does not push up the curled underside of the container flange portion 4. The first locking portion 21 does not function. If it is 3 times or more, the rotation of the flap portion 11 is restricted midway, and the top of the convex portion 23 does not come into position on the curled underside of the container flange portion 4.

[0103] In order for the top of the convex portion 23 to be properly positioned on the curled underside of the container flange portion 4, it is important that the folding score lines 13, 14 are of an appropriate length.

[0104] The central angle of the arc formed by one end of the folding cut line 13 and the other end of the folding cut line 14 is preferably more than 50 degrees and less than 90 degrees. More preferably, it is more than 60 degrees and less than 80 degrees. Under these conditions, the flap portion 11 rotates and the top of the convex portion 23 is appropriately positioned on the curled underside of the container flange portion 4.

[0105] If the central angle of the arc formed by one end of folding cut line 13 and the other end of folding cut line 14 is 50 degrees or less, the rotation of flap portion 11 is restricted midway, and the apex of convex portion 23 is not positioned on the curled underside of container flange 4. If the central angle is 90 degrees or more, the mouth size is insufficient.

[0106] In addition, when the strength was compared between a case in which the flap portion 11 rotated appropriately and the top of the convex portion 23 was appropriately positioned on the curled underside of the container flange portion 4 and a case in which the rotation of the flap portion 11 was restrained midway and the top of the convex portion 23 was not positioned on the curled underside of the container flange portion 4 (an inappropriate example), a difference of about 10 times was found when the gripping portion 53 was pulled up and the lid was removed.

[0107] ~Variations~ The present invention is characterized in that it includes a locking mechanism 10 and a drinking spout 50. The present invention is not limited to the above-described embodiment, and various modifications are possible within the scope of the above-described technical concept.

[0108] Figure 11 shows some modified lids, particularly modified spouts 50. The spout 50A in Figure 11A does not have the hooking cut line 54.

[0109] 11B does not have a knob 53, but instead has a notch provided distal to the opening / closing part 52. By hooking a finger in the space formed by the notch, the opening / closing part 52 can be rotated to open and close the drinking spout 56.

[0110] 11C does not have a knob 53, but instead has a C-shaped cut line provided distal to the opening / closing part 52. By hooking a finger in the space formed by the cut line, the opening / closing part 52 can be rotated to open and close the drinking spout 56.

[0111] In other words, the drinking spout 50 of the present invention only needs to be openable and closable, and it is even better if it has a hook portion 55 . [Explanation of symbols]

[0112] 1 container 2 bottom 3. Torso 4 Flange 6 Lid 7 Lid body 10 Locking mechanism 11 Flap section 12 Convex cut line 13 Folding cut lines 14 Folding cut lines 15 Connection 16 Connection 17 Notch 18 Notch 21 Rock Club 22 Rock Club 23 Convex part 31 Locking mechanism 32 Locking mechanism 33 Locking mechanism 50 Mouth 51 Rotating shaft 52 Opening and closing section 53 Knob 54 Cutting line for hooking 55 Latch part 56 Opening

Claims

1. A paper lid for a container having a curled flange, A lid main body portion, a plurality of locking mechanisms provided on an outer periphery of the lid body and locked to the curled flange; a drinking spout portion provided between one locking mechanism and an adjacent locking mechanism; A paper lid comprising:

2. The lock mechanism, in a blank state, A flap portion extending outward from the lid body portion; A convex cut line provided on the flap portion so as to be convex toward the lid main body portion; Left and right folding cut lines are provided along positions corresponding to the curled flanges so as to straddle the convex cut lines; 2. The paper lid according to claim 1, characterized in that it comprises

3. In the locking mechanism, in the locked state, The flap portion is rotated downward about both ends of the left and right folding cut lines, an apex of a convex portion formed by the convex cut line is located below the curled flange and forms a first locking portion; Both upper ends of the flap portion come into contact with the side surfaces of the curled flange to form a second locking portion.

3. The paper lid according to claim 2.

4. A cutout portion is formed on the outer periphery of the lid body portion adjacent to both ends of the bending cut line, the cutout portion being cut out toward the center of the lid body portion. The paper lid according to claim 2, further comprising:

5. The locking mechanism has three locations.

2. The paper lid according to claim 1.

6. a central angle formed by the center of the first lock mechanism and the center of the second lock mechanism on the outer periphery is larger than a central angle formed by the center of the first lock mechanism and the center of the third lock mechanism and a central angle formed by the center of the second lock mechanism and the center of the third lock mechanism, The drinking spout is provided between the first locking mechanism and the second locking mechanism. The paper lid according to claim 5.

7. The drinking spout portion is A rotation shaft provided at the center of the lid main body; An opening / closing unit that can open and close the drinking spout via the rotating shaft; A knob provided distal to the opening and closing portion; A hooking cut line provided on the knob portion; It consists of: The hook portion formed by the hook cut line is When the drinking spout is closed, the drinking spout can be hooked to a corresponding portion of the curled flange. When the drinking spout is open, it can be hooked to the symmetrical portion of the curled flange.

2. The paper lid according to claim 1.

8. The paper lid according to claim 1, A container having a curled flange; A container with a lid comprising:

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