build

Abstract

To provide a lid that can prevent tilting when multiple units are stacked. [Solution] The lid 12 is fitted onto the curled portion 21b of the cup container 11, and comprises a fitting portion 33 that fits onto the curled portion 21b, a top wall portion 31 integrally formed with the fitting portion 33 and covering the open end of the cup container 11, and a peripheral wall portion 32 that has a tapered portion 31b continuous with the top wall portion 31 and a straight portion 31a continuous with the tapered portion 31b, and is continuous with the fitting portion 33 and the top wall portion 31.

Description

TECHNICAL FIELD

[0001] The present invention relates to a lid for use in a cup container. BACKGROUND ART

[0002] Lids that are detachably attachable to a cup container having a brim portion (curl portion) formed by curling treatment around an opening and that fit with the brim portion (curl portion) have been conventionally known (for example, see Patent Document 1). A plurality of such lids are stacked for transport and storage. PRIOR ART DOCUMENTS PATENT DOCUMENTS

[0003] PATENT DOCUMENT 1 Japanese Utility Model Laid-Open No. 6-64581 SUMMARY OF THE INVENTION PROBLEM TO BE SOLVED BY THE INVENTION

[0004] However, such lids have a relatively large gap between adjacent lids when stacked, for example when the pitch in the stacked state is large, which causes a problem that the stacked lids tilt when a plurality of lids are stacked. If the stacked lids tilt, there is a risk of falling over or the lids stacked on the upper side dropping. In addition, when distributing the manufactured lids, they are packed in bags that are long in one direction, but they are easily deformed in the left-right direction, resulting in a problem that the products are difficult to handle during transport on production lines and storage.

[0005] Accordingly, an object of the present invention is to provide a lid that can suppress tilting when a plurality of the lids are stacked. MEANS FOR SOLVING THE PROBLEM

[0006] According to one aspect of the present invention, the lid is fitted to the curled portion of a cup container and comprises a fitting portion that fits to the curled portion, a top wall portion integrally formed with the fitting portion and covering the open end of the cup container, and a peripheral wall portion that has a tapered portion continuous with the top wall portion and a straight portion continuous with the tapered portion, and is continuous with the fitting portion and the top wall portion. [Effects of the Invention]

[0007] According to the present invention, it is possible to provide a lid that can prevent tilting when multiple units are stacked. [Brief explanation of the drawing]

[0008] [Figure 1] A side view showing the configuration of a container according to one embodiment of the present invention, with a portion cut out. [Figure 2] A perspective view illustrating the structure of the lid used for the container. [Figure 3] A side view showing the structure of the lid. [Figure 4] A cross-sectional view showing the structure of the lid. [Figure 5] An explanatory diagram showing the main components when the lids are stacked. [Figure 6] An explanatory diagram showing the dimensional relationships of the main components when the lids are stacked. [Figure 7] An explanatory diagram showing the main components when the lids of the comparative example are stacked. [Figure 8] An explanatory diagram showing the dimensional relationships of the main components when the lids of the comparative example are stacked. [Figure 9] An explanatory diagram showing an example of the stacked state of the lid of the embodiment and the lid of the comparative example. [Figure 10] An explanatory diagram showing the configuration of the angle measuring device used in the evaluation test. [Figure 11] An explanatory diagram showing the floating state of the stacked lids, in relation to the evaluation test. [Figure 12] An explanatory diagram showing an example of the results of an evaluation test. [Figure 13] An explanatory diagram showing an example of the results of an evaluation test. [Modes for carrying out the invention]

[0009] Hereinafter, a lid 12 and a container 1 using the lid 12 according to one embodiment of the present invention will be described with reference to Figures 1 to 14. Figure 1 is a side view showing a partially cutaway configuration of the container 1 according to one embodiment of the present invention, Figure 2 is a perspective view illustrating the configuration of the lid 12 used in the container 1, Figure 3 is a side view showing the configuration of the lid 12, and Figure 4 is a cross-sectional view showing the configuration of the lid 12. Figure 5 is an explanatory diagram showing the main components when the lids 12 are stacked, and Figure 6 is an explanatory diagram showing an enlarged view of the main components enclosed by the dashed line in Figure 5 when the lids 12 are stacked, as well as the dimensional relationships. Figure 7 is an explanatory diagram showing the main components when the lid 12A according to a comparative example is stacked, and Figure 8 is an explanatory diagram showing the dimensional relationships of the main components enclosed by the dashed line in Figure 7 when the lid 12A according to a comparative example is stacked. Figure 9 is an explanatory diagram showing an example of the stacked state of the lid 12 of the embodiment and the lid 12A of the comparative example. Figure 10 is an explanatory diagram showing the configuration of the angle measuring device 100 used in the evaluation test. Figure 11 is an explanatory diagram showing the floating state of the stacked lids 12 and 12A in relation to the evaluation test. Figures 12 and 13 are explanatory diagrams showing an example of the evaluation test results.

[0010] As shown in Figure 1, the container 1 comprises a container body 11 and a lid 12. The container 1 holds contents such as beverages. Here, the contents are, for example, hot beverages such as hot coffee. The container 1 is used, for example, in a beverage service at a store such as a convenience store or coffee shop.

[0011] As shown in Figure 1, the container body 11 is a cup container formed from, for example, a resin material or a paper substrate. In this embodiment, the container body 11 will be described using the example of a paper cup formed from a paper substrate. As shown in Figure 1, the container body 11 comprises a body portion 21 and a bottom portion 22.

[0012] The body part 21 is formed in a cylindrical shape with a bottom part 22 provided at one end and the other end open. The body part 21 gradually increases in diameter from one end toward the open other end. The body part 21 is formed, for example, by forming a rectangular or fan-shaped paper base material into a tubular shape, overlapping both ends and bonding them together. Therefore, the body part 21 has a double overlapping seam part 21a by bonding both ends of the paper base material together.

[0013] Further, the body part 21 has a curled portion 21b constituting a mouth portion at the open end (the other end). The curled portion 21b is a so-called top curl, and is formed by curling the end of the body part 21. The curled portion 21b is formed in an annular shape. The curled portion 21b protrudes outward from the outer peripheral surface of the end of the body part 21. The curled portion 21b is wound a plurality of times and has a substantially circular cross section. The lid 12 is fitted to the curled portion 21b.

[0014] The bottom part 22 is provided on one end side of the body part 21. The bottom part 22 is positioned slightly inside the body part 21 from one end of the body part 21, and is integrally bonded to the body part 21. The bottom part 22 closes the one end side of the body part 21.

[0015] The lid 12 is a so-called lid. As shown in Figure 1, the lid 12 is detachably fitted to the curled portion 21b of the container body 11. As shown in Figures 1 to 4, the lid 12 includes a top wall portion 31, a peripheral wall portion 32, a fitting portion 33, and a skirt portion 34. The lid 12 is formed by integrally molding the top wall portion 31, the peripheral wall portion 32, the fitting portion 33, and the skirt portion 34 from a sheet-shaped resin material. Examples of the resin material forming the lid 12 include polystyrene (PS), polypropylene (PP), polyethylene terephthalate (PET), biodegradable resins, and the like. Further, the resin material is a roll sheet formed by winding a sheet, and the lid 12 is formed by molding this roll sheet with a manufacturing apparatus.

[0016] The top wall portion 31 covers the open end of the container body 11. As shown in Figure 2, the surface shape of the top wall portion 31 is appropriately set to be flat, uneven, or the like according to usability such as design properties and ease of drinking. The top wall portion 31 includes, for example, a score 41, a hinge portion 42, a locking portion 44, and a locked portion 45.

[0017] The score 41 is provided along a part of the region of the beverage passage portion for discharging the content. The score 41 is disposed on a part of the top wall portion 31 on the side of the peripheral wall portion 32. The score 41 is a cut provided in the top wall portion 31. The region of the top wall portion 31 surrounded by the score 41 rotates around the hinge portion 42 in a direction away from the outer surface of the other region of the top wall portion 31, thereby forming a beverage passage portion serving as a drinking spout in the top wall portion 31. The shape of the score 41 can be appropriately set as long as the beverage passage portion can be formed. For example, in the example of the present embodiment, the score 41, together with the hinge portion 42, surrounds a trapezoidal region, with the score 41 constituting the short side and the inclined sides, and the hinge portion 42 constituting the long side.

[0018] The hinge portion 42 is provided linearly between both ends of the score 41. The hinge portion 42 is formed by, for example, a recess or a step provided in the top wall portion 31. The hinge portion 42 forms a rotation axis for the part surrounded by the score 41.

[0019] As shown in Figure 2, the locking portion 44 is a protrusion provided in the region surrounded by the score 41. As shown in Figure 2, the locked portion 45 is a recess provided at a position symmetrical to the locking portion 44 with the hinge portion 42 as the center. The locked portion 45 is formed in a shape that allows the locking portion 44 to be fitted therein.

[0020] As shown in Figures 1 to 5, the peripheral wall portion 32 is continuous with the outer peripheral edge of the top wall portion 31 at one end and with the fitting portion 33 at the other end. For example, the peripheral wall portion 32 is formed in a cylindrical shape of the same diameter from the fitting portion 33 side toward the top wall portion 31 side, and is formed in a cylindrical shape that gradually decreases in diameter from a predetermined position. Specifically, the peripheral wall portion 32 has a straight portion 32a formed in a cylindrical shape of the same diameter, and a tapered portion 32b that is continuous with the straight portion 32a and the top wall portion 31. In the axial direction, the length of the straight portion 32a is shorter than the length of the tapered portion 32b. The peripheral wall portion 32 also has an annular plate portion 32c at the other end that extends in a direction perpendicular to the axial direction and is continuous with the straight portion 32a and the fitting portion 33. Furthermore, the corners of the straight portion 32a and the annular plate portion 32c of the peripheral wall portion 32 are continuous with a curved surface of a predetermined radius of curvature.

[0021] For example, the angle θ1 of the straight portion 32a with respect to the axial direction is 0°, and the straight portion 32a extends along the axial direction. That is, the angle of the straight portion 32a with respect to the direction perpendicular to the axial direction, for example, the extending direction of the annular plate portion 32c, is 90°. Also, the inclination angle θ2 of the tapered portion 32b with respect to the axial direction is set to 4° to 10° as an example.

[0022] As a specific example, the height H from the lower surface of the annular plate portion 32c to the upper end of the straight portion 32a is set to 3 mm to 5 mm. Also, the radius of curvature R of the corners of the straight portion 32a and the annular plate portion 32c of the peripheral wall portion 32 is set to, for example, 0.5 to 1.5 mm.

[0023] The fitting portion 33 is formed in an annular shape, and its inner surface shape is formed to be substantially the same as the outer surface shape of the curled portion 21b of the container body 11. The fitting portion 33 fits with the curled portion 21b of the container body 11. The fitting portion 33 is continuous with the annular plate portion 32c of the peripheral wall portion 32.

[0024] The skirt portion 34 is integrally provided with the fitting portion 33. The skirt portion 34 is formed in a cylindrical shape that expands in diameter from top to bottom. The skirt portion 34 guides the movement of the curled portion 21b of the container body 11 toward the fitting portion 33. The skirt portion 34 also has a plurality of protrusions 34a provided along the circumferential direction.

[0025] Multiple protrusions 34a are provided on the skirt portion 34 at equal intervals with predetermined spacings in the circumferential direction of the skirt portion 34. Each protrusion 34a is a recess extending along the circumferential direction of the skirt portion 34. The circumferential length of each protrusion 34a is set to be longer than the spacing between adjacent protrusions 34a. Multiple protrusions 34a are formed to be able to abut against the lower surface of the curl portion 21b.

[0026] The lid 12 configured in this way has a straight portion 32a at the lower end of the tapered portion 32b of the peripheral wall portion 32, which is on the fitting portion 33 side. As a result, as shown in Figures 5 and 6, when the lids 12 are stacked, the corner formed by the straight portion 32a and the annular plate portion 32c of the upper stacked lid 12 will come into contact with or be close to the tapered portion 32b of the lower lid 12. As a result, the gap that occurs in the radial direction of the stacked lids 12 is eliminated or reduced, and as shown in the embodiment of Figure 9, the lid 12 of the embodiment can suppress tilting of the stacked lids 12 even when there are many stacked lids 12.

[0027] On the other hand, as shown in the comparative examples in Figures 7 and 8, in a lid 12A that does not have a straight portion 32a at the lower end of the tapered portion 32b, when stacked lids 12A that are adjacent to each other vertically, the tapered portions 32b of the upper lid 12A and the tapered portion 32b of the lower lid 12A will face each other at positions with different inner diameters. That is, the tapered portions 32b of the upper lid 12A will face each other at a position where the inner diameter of the tapered portion 32b of the upper lid 12A is larger than the outer diameter of the tapered portion 32b of the lower lid 12A. Therefore, when the lids 12A of the comparative examples are stacked, a radial gap is created between the upper and lower lids 12A. Consequently, when the number of stacked lids 12A increases, the upper lid 12A will shift radially, causing the stacked lids 12 to tilt as a whole, as shown in the comparative example in Figure 9. Thus, the lid 12 according to this embodiment has a straight portion 32a at the lower end of the peripheral wall portion 32, which suppresses tilting when stacked compared to the lid 12A which does not have a straight portion 32a.

[0028] Furthermore, since the angle of inclination of the tapered portion 32b of the lid 12 can be the same as that of the conventional lid 12A which does not have a straight portion 32a, it is possible to suppress tilting when stacked without having to significantly change the design of the lid 12.

[0029] Furthermore, since the lid 12 can suppress tilting when stacked, it can suppress losses caused by tipping over.

[0030] Next, several evaluation tests using the lid 12 configured in this way, and the evaluation results, will be described below.

[0031] [Evaluation Test] As an evaluation test, the inclination angle of the stacked lids 12 and 12A was measured when 50 lids 12 from Examples 1 to 3 and lids 12A from Comparative Examples 1 to 3 were stacked. Here, the inclination angle was measured using the angle measuring device 100 shown in Figure 10. In addition, the angle when the bottom lid 12 or 12A of the stacked lids 12 or 12A lifted off the installation surface (base 101 of the angle measuring device 100) (lift angle), and the angle when the stacked lids 12 or 12A tipped over (tipping angle) were measured using the angle measuring device 100, as shown by the arrow X in Figure 11. Furthermore, as the tilt angle, the side where the drinking spout (score 41) is formed was set to 0°, and the angles were set to 90°, 180°, and 270° clockwise. The floating angle (°) and tipping angle (°) were measured in each of the 0°, 90°, 180°, and 270° directions, and the average value (ave.) for each direction was calculated.

[0032] Furthermore, a larger floating angle indicates that the stacked lids 12 and 12A are tilted, so a smaller value suggests that they are not tilted when stacked.

[0033] An angle measuring device 100 used to measure such an inclination angle includes, for example, a base 101, a fixed body 102 fixed to the base 101, a rotating body 103 rotatably supported by the fixed body 102 and rotatable within a predetermined angular range around a single axis, for example, from 0° to 90°, a pressing body 104 provided on the rotating body 103 that presses the covers 12, 12A in the rotational direction of the rotating body 103, and a scale 105 that indicates the rotation angle of the rotating body 103 from a reference position. The rotating body 103 extends in one direction, for example, vertically in a reference position where it is not rotating, and is supported by the fixed body 102 so as to be rotatable around a rotation center provided below it.

[0034] The pressing body 104 is fixed to the rotating body 103 and moves as the rotating body 103 rotates, thereby pressing a portion of the stacked lids 12 and 12A in the direction of rotation of the rotating body 103. The scale 105 is formed to measure the rotation angle of the rotating body 103 relative to the reference position after it has rotated from the reference position.

[0035] As shown in Figures 6 and 8, when the angle of the straight portion 32a with respect to the axial direction is θ1, the inclination angle of the tapered portion 32b with respect to the axial direction is θ2, the height from the lower surface of the annular plate portion 32c to the upper end of the straight portion 32a is H, the radius of curvature on the inner surface of the corners of the straight portion 32a and the annular plate portion 32c is R, and the gap (spacing) between the peripheral wall portions 32 of the upper and lower adjacent lids 12A when stacked is W, the lids 12 of Examples 1 to 3 and Comparative Examples 1 to 3 have the following configuration.

[0036] Each dimension and gap W are design values. In the case of the lid 12 in the embodiment in which the straight portion 32a is formed on the peripheral wall portion 32, the gap W is the minimum gap between the straight portion 32a of the upper lid 12 and the tapered portion 32b of the lower lid 12. In the case of the comparative example lid 12A in which the straight portion 32a is not formed on the peripheral wall portion 32, the gap W is the gap between the tapered portion 32b of the upper lid 12A and the tapered portion 32b of the lower lid 12A.

[0037] In Example 1, the lid 12 had θ1 set to 0° (angle with respect to the annular plate portion 32c of 90°), θ2 set to 6.5°, height H set to 3.51 mm, gap W set to 0.13 mm, and R set to 1.0 mm.

[0038] In Example 2, the lid 12 had θ1 set to 0° (angle with respect to the annular plate portion 32c of 90°), θ2 set to 6.5°, height H set to 3.95 mm, gap W set to 0.08 mm, and R set to 1.0 mm.

[0039] In Example 3, the lid 12 had θ1 set to 0° (angle with respect to the annular plate portion 32c of 90°), θ2 set to 6.5°, height H set to 3.95 mm, gap W set to 0.09 mm, and R set to 1.0 mm.

[0040] In Comparative Example 1, lid 12A had a θ2 of 6.5°, a gap W of 0.37 mm, and R of 0.5 mm.

[0041] In Comparative Example 2, lid 12A had a θ2 of 6.5°, a gap W of 0.36 mm, and R of 0.5 mm.

[0042] In Comparative Example 3, lid 12A had θ2 set to 5°, gap W set to 0.18 mm, and R set to 0.5 mm.

[0043] In this evaluation test, 50 lids 12 from Examples 1 to 3 and lids 12A from Comparative Examples 1 to 3 were stacked, and the second lid 12 or 12A from the top of the stack of 50 lids 12 or 12A was pressed by the angle measuring device 100 with a rotating body 103. The angle of lift when the stack of lids 12 or 12A was lifted and the angle of tipping when it tipped over were measured. The height (total height) of the stack of 50 lids 12 or 12A was measured with a scale, and the tilt state was imaged. In addition, images were taken of a stack of 5 lids 12 or 12A using an X-ray CT scanner (YXLON FF20 CT), and the gap W and the radius of curvature R of the corners were analyzed from the image data. Furthermore, the gap W was measured by taking the gaps between adjacent lids 12 and 12A in the vertical direction, on the drinking side (0° direction) and the opposite drinking side (180° direction) (lid gap). The average value of the left and right gaps for each vertical combination and the average of the left and right average values ​​for all vertical combinations (overall average value) were calculated.

[0044] [Results of the evaluation test] The results of the evaluation test are shown in Figures 12 and 13. As shown in Figure 12, the lid 12 of Example 1 had a total height of 294 mm, with a floating angle of 11° in the 0° direction, 8° in the 90° direction, 10° in the 180° direction, and 9° in the 270° direction, with an average floating angle of 10°. The tipping angle was 20° in all directions. As can be seen from the captured photographs, the stack of 50 lids 12 was slightly tilted. Furthermore, when data from X-ray CT scans of a stack of 5 lids 12 were analyzed, the radius of curvature R at the corners ranged from 0.9 mm to 1.0 mm, the gap W was in the range of 0.07 mm to 0.10 mm on the left and right average, and the overall average was 0.08 mm.

[0045] As shown in Figure 12, the lid 12 of Example 2 had a total height of 294 mm, with a floating angle of 4° in the 0° direction, 2° in the 90° direction, 3° in the 180° direction, and 2° in the 270° direction, with an average floating angle of 3°. The tipping angles were 20° in the 0° direction, 19° in the 90° direction, 18° in the 180° direction, and 18° in the 270° direction, with an average tipping angle of 19°. As can be seen from the captured photographs, the stack of 50 lids 12 was not significantly tilted. Furthermore, analysis of data obtained by imaging a stack of 5 lids 12 with an X-ray CT scanner revealed that the radius of curvature R at the corners ranged from 0.8 mm to 0.9 mm, and the gap W was 0 mm for both the left-right average and the overall average.

[0046] As shown in Figure 13, the lid 12 of Example 3 had a total height of 294 mm, with a floating angle of 4° in the 0° direction, 5° in the 90° direction, 3° in the 180° direction, and 2° in the 270° direction, with an average floating angle of 4°. The tipping angles were 20° in the 0° direction, 19° in the 90° direction, 19° in the 180° direction, and 18° in the 270° direction, with an average tipping angle of 19°. As can be seen from the captured photographs, the stack of 50 lids 12 was not significantly tilted. Furthermore, analysis of data obtained by X-ray CT imaging of a stack of 5 lids 12 showed that the radius of curvature R at the corners ranged from 0.6 mm to 0.7 mm, and the gap W was 0 mm for both the left-right average and the overall average.

[0047] As shown in Figure 12, the lid 12A of Comparative Example 1 had a total height of 291 mm, with a floating angle of 10° in the 0° direction, 17° in the 90° direction, 15° in the 180° direction, and 17° in the 270° direction, with an average floating angle of 15°. The tipping angles were 20° in the 0° direction, 17° in the 90° direction, 8° in the 180° direction, and 6° in the 270° direction, with an average tipping angle of 13°. As can be seen from the captured photographs, the stacked lid 12A was more inclined than the stacked lids 12 of Examples 1 to 3. Furthermore, analysis of data obtained by X-ray CT imaging of a stacked lid 12A showed that the radius of curvature R at the corners ranged from 0.8 mm to 1.0 mm, the gap W averaged from 0.35 to 0.37 mm on both sides, and the overall average was 0.36 mm.

[0048] As shown in Figure 13, the lid 12A of Comparative Example 2 had a total height of 291 mm, with a floating angle of 10° in the 0° direction, 18° in the 90° direction, 18° in the 180° direction, and 17° in the 270° direction, with an average floating angle of 16°. The tipping angles were 16° in the 0° direction, 15° in the 90° direction, 21° in the 180° direction, and 17° in the 270° direction, with an average tipping angle of 17°. As can be seen from the captured photographs, the stacked lid 12A was more inclined than the stacked lids 12 of Examples 1 to 3. Furthermore, analysis of data obtained by X-ray CT imaging of a stacked lid 12A of 5 revealed that the radius of curvature R at the corners ranged from 0.8 mm to 1.0 mm, the gap W averaged from 0.29 to 0.32 mm on both sides, and the overall average was 0.31 mm.

[0049] As shown in Figure 13, the lid 12A of Comparative Example 3 had a total height of 291 mm, with a floating angle of 6° in the 0° direction, 5° in the 90° direction, 6° in the 180° direction, and 6° in the 270° direction, with an average floating angle of 6°. The tipping angles were 24° in the 0° direction, 23° in the 90° direction, 22° in the 180° direction, and 22° in the 270° direction, with an average tipping angle of 23°. As can be seen from the captured photographs, the stacked 50 lids 12A were less tilted than the stacked 50 lids 12 of Example 1, but were more tilted than the stacked 50 lids 12 of Examples 2 and 3. Furthermore, analysis of data obtained by imaging five stacked lids 12A with an X-ray CT scanner revealed that the radius of curvature R at the corners ranged from 1.1 mm to 1.2 mm, the gap W averaged between 0.13 and 0.20 mm on both sides, and the overall average was 0.16 mm.

[0050] As can be seen from the evaluation test results, by providing the straight section 32a, the radial gap of the stacked lids 12 can be eliminated or reduced, thereby preventing the lids 12 from tipping over when stacked. As in Comparative Example 3, setting a small gap W when the lids 12A are stacked can also prevent tipping, but this makes clearance control difficult, leading to decreased manufacturability and increased manufacturing costs.

[0051] Furthermore, by providing a straight section 32a and eliminating the gap W, tilting can be almost completely eliminated even when 50 lids are stacked, as shown in Examples 2 and 3. Therefore, the stacked lids 12 are stable, and when packaged in a bag or other packaging body, the lids 12 can prevent a decrease in workability during transport and storage. Although eliminating the gap W eliminates the tilting of the stacked lids 12, it may become difficult to separate a single lid from the stack. Therefore, it is more preferable to provide a gap W to the extent that it does not affect the stability of the stacked lids 12.

[0052] Furthermore, variations were observed in the tipping angle of the lids 12 of Examples 1 to 3 and the lids 12A of Comparative Examples 1 to 3. This is presumed to be because, in the stacked lids 12, the conditions for tipping differ depending on whether the gap W between the stacked lids 12 and 12A is small or large.

[0053] As described above, according to the lid 12 of this embodiment, by providing a straight portion 32a on the peripheral wall portion 32, tilting when multiple lids are stacked can be suppressed.

[0054] It should be noted that the present invention is not limited to the embodiments described above. In the example described above, the lid 12 may be configured so that the score 41 does not have a locking portion 44 and a locked portion 45. In such a configuration, instead of forming the score 41 when molding the lid 12, the drinking spout can be formed by punching.

[0055] Furthermore, in the example described above, the skirt portion 34 is described as being formed in a tapered shape that expands in diameter from top to bottom on the radially outward side, but it is not limited to this configuration, and the skirt portion 34 may also be formed in a cylindrical shape with the same diameter.

[0056] It should be noted that the present invention is not limited to the embodiments described above, and can be modified in various ways during implementation without departing from its essence. Furthermore, each embodiment may be combined as appropriate, and in that case, the combined effects can be obtained. Moreover, the above embodiments include various inventions, and various inventions can be extracted by selecting combinations from the multiple constituent elements disclosed. For example, if the problem can be solved and effects obtained even if some constituent elements are deleted from all the constituent elements shown in the embodiment, then the configuration with these deleted constituent elements can be extracted as an invention. [Explanation of symbols]

[0057] 1...Container, 11...Container body (cup container), 12, 12A...Lid, 21...Body, 21a...Seam, 21b...Curled, 22...Bottom, 23b...Tapered, 31...Top wall, 32...Surface wall, 32a...Straight, 32b...Tapered, 32c...Ring plate, 33...Fitting part, 34...Skirt, 34a...Protrusion, 41...Score, 42...Hinge, 44...Locking part, 45...Locking part, 100...Angle measuring device, 101...Base, 102...Fixed body, 103...Rotating body, 104...Pressing body, 105...Scale.

Claims

1. A lid that fits onto the curled part of a cup container, A fitting part that fits into the curled part, A top wall portion that covers the open end of the cup container, which is integrally formed with the fitting portion, The tapered portion is continuous with the top wall portion and the straight portion is continuous with the tapered portion, and the fitting portion and the top wall portion are continuous with the peripheral wall portion, A lid equipped with a cover.

2. The lid according to claim 1, wherein the straight portion contacts the tapered portion of the lower lid when the two lids are stacked.

Images