Stopper cap

Abstract

To provide a plug cap which improves a plug opening property.SOLUTION: In the plugging cap 10, the skirt portion 22 of the cap main body 20 has the skirt flap portion 24, the outer peripheral wall 40 includes the outer peripheral wall main body portion 31 and the handle side wall portion 32 which is disposed between one end and the other end of the outer peripheral wall main body portion 31 in the circumferential direction and is connected to the skirt flap portion 24 by the inner peripheral side connection portion 60, and the handle side wall portion 32 and the operation handle 40 are connected by the outer peripheral side connection portion 50.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a stoppering cap that is attached by being placed on the mouth of a container and then pressed downward. [Background technology]

[0002] Conventionally, as a cap to be attached to the mouth of a container such as a bottle or a PET bottle, a stopper cap is known which is attached by being placed on the mouth of the container and then pressed downward (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2013-241219 Summary of the Invention [Problem to be solved by the invention]

[0004] However, there is room for improvement in terms of ease of opening such a stopper cap. That is, when opening the cap, first the finger grip 3a is pulled upward, the entire annular band 3 is raised, the outer tube 1c and the inner tube ridge 1e are removed from the container via the connecting portion 5, and the base cap 1 is detached from the container. At this time, because the outer tube 1c is annular, it is deformed into an ellipse during the process of removing it from the container, and the outer tube 1c and the inner tube ridge 1e, which are perpendicular to the connecting portion 5, are deformed toward the inner diameter, which locally increases the engagement force with the container and makes it difficult to detach the cap from the container.

[0005] Therefore, the present invention aims to solve these problems and provide a stoppering cap that improves the ease of opening. [Means for solving the problem]

[0006] The stoppering cap of the present invention comprises a cap body to be attached to the mouth of a container, an outer peripheral wall disposed on the outer peripheral side of the cap body and connected to the cap body, and an operating handle disposed on the outer peripheral side of the outer peripheral wall and connected to the outer peripheral wall, wherein the cap body has a body top surface portion including a seal portion that can fit tightly against the mouth of the container, and a skirt portion formed on the outer peripheral side of the body top surface portion, the skirt portion having a skirt body portion separated by a pair of slits formed in the circumferential direction thereof, and a rotatable skirt flap portion, the skirt body portion having a cap-side engaging portion on its inner peripheral surface that engages with the mouth of the container, the outer peripheral wall comprising an outer peripheral wall body portion disposed on the outer peripheral side of the skirt portion, and a handle-side wall portion disposed between one and the other circumferential ends of the outer peripheral wall body portion and connected to the skirt flap portion by an inner peripheral connecting portion, and the handle-side wall portion and the operating handle are connected by the outer peripheral connecting portion, thereby solving the above-mentioned problem. [Effects of the Invention]

[0007] In the present invention, the openability can be improved. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is an explanatory diagram showing a state in which a stopper cap according to one embodiment of the present invention is placed on a container. [Figure 2] FIG. 4 is an explanatory diagram showing the stopper cap from above. [Figure 3] FIG. 4 is an explanatory diagram showing the stopper cap from the bottom side. [Figure 4] 1 is an explanatory diagram showing the state during the opening operation after the stopper cap has been placed on the container. [Figure 5] 1 is an explanatory diagram showing the state during the opening operation after the stopper cap has been placed on the container. [Figure 6] 2 is an explanatory cross-sectional view of the stoppering cap in the state shown in FIG. 1. FIG. [Figure 7] FIG. 5 is an explanatory cross-sectional view of the stoppering cap in the state shown in FIG. 4. DETAILED DESCRIPTION OF THE INVENTION

[0009] A stoppering cap 10 according to one embodiment of the present invention will be described below with reference to the drawings.

[0010] The stoppering cap 10 is made of synthetic resin, and is placed on the container mouth C of a container such as a bottle, a PET bottle, or a metal container, and then pressed down firmly to attach to the container mouth C and close the container mouth C. As shown in FIGS. 1 to 3, the stoppering cap 10 comprises a cap body 20 attached to the container mouth C, an outer peripheral wall 30 disposed on the outer peripheral side of the cap body 20 and connected to a skirt portion 22 of the cap body 20, an operating handle 40 disposed on the outer peripheral side of the outer peripheral wall 30 and connected to the outer peripheral wall 30, and a handle portion 40 on the handle side of the outer peripheral wall 30. It is integrally provided with an outer connecting portion 50 that connects the wall portion 32 and the operating handle 40, a first inner connecting portion 60 that connects the skirt flap portion 24 of the cap body 20 and the handle side wall portion 32, a second inner connecting portion 61 that connects the skirt main body portion 23 of the cap body 20 and the outer wall main body portion 31 of the outer wall 30, a TE bridge 70 that connects the outer wall main body portion 31 and the handle side wall portion 32, and a breakable bridge 80 that connects the skirt main body portion 23 and the handle side wall portion 32.

[0011] The specific configuration of each component of the stoppering cap 10 will be described below with reference to the drawings.

[0012] First, as shown in FIGS. 1 to 3, the cap body 20 has a disk-shaped body top surface portion 21 and a substantially cylindrical skirt portion 22 formed on the outer periphery of the body top surface portion 21.

[0013] The main body top surface portion 21 has a sealing portion that can be tightly fitted to the container mouth portion C, and in this embodiment, as shown in Figures 3 and 6, the sealing portion has an outer seal ring portion 21a that protrudes from the underside of the main body top surface portion 21, and an inner seal ring portion 21b that protrudes from the underside of the main body top surface portion 21 on the inner side of the outer seal ring portion 21a.

[0014] As shown in Figure 6, the outer seal ring portion 21a is a portion that can be tightly attached to the outer peripheral surface of the upper end of the container mouth portion C when the container is closed (when the stoppering cap 10 is attached to the container mouth portion C), and in this embodiment, is formed in a circular ring shape that is connected in a circumferential direction (circumferential direction of the cap body 20).

[0015] As shown in Figure 6, the inner seal ring portion 21b is a portion that can be tightly attached to the inner surface of the upper end of the container mouth portion C when the cap is closed, and in this embodiment, it is formed in a circular ring shape that is connected in a circumferential direction (circumferential direction of the cap body 20).

[0016] As shown in FIGS. 3 and 6, the inner seal ring portion 21b has a notch portion 21c formed by cutting out a part of it (in this embodiment, the outer peripheral surface side of that part in the circumferential direction). As shown in Figure 3, the cutout portion 21c is formed so that its circumferential position at least partially overlaps with the circumferential position of the skirt flap portion 24 (or the slit 22a described later). In other words, when viewed in the vertical direction, at least a portion of the cutout portion 21c is formed so that it is located on the inner circumferential side of (overlaps in the radial direction with) the skirt flap portion 24 (or the circumferential position of the slit 22a). More specifically, in this embodiment, as shown in FIG. 3, the circumferential center position of the cutout portion 21c and the circumferential center position of the skirt flap portion 24 are formed to be located at the same position in the circumferential direction.

[0017] The skirt portion 22 has an overall tubular (cylindrical in this embodiment) shape, and as shown in Figures 1 to 3, has a C-ring-shaped skirt main body portion 23 separated by a pair of slits 22a formed in the circumferential direction, and a skirt flap portion 24 arranged between one end and the other end in the circumferential direction of the skirt main body portion 23, the lower end of which is rotatable (movable, swingable) in the radial direction.

[0018] As shown in FIGS. 1 to 3, the skirt main body 23 has a plurality of cap side engaging portions 23a formed on its inner circumferential surface to engage with the container opening C, as shown in FIG. As shown in Figures 3 and 6, the cap side engagement portion 23a is formed to protrude from the inner surface of the skirt main body portion 23, and when the cap is closed, it engages with the container side engagement portion C2 that protrudes from the outer surface of the container mouth portion C, thereby preventing the stoppering cap 10 from coming off the container mouth portion C.

[0019] As shown in Figures 1 and 3, the skirt flap portion 24 has a skirt connected portion 24a that is connected to the handle side wall portion 32 by the inner connecting portion 60, and a cap side engaging portion 24b that is formed on the inner surface of the skirt flap portion 24 and engages with the container mouth portion C. The skirt flap portion 24 is preferably formed as a region having an angle range of 10 to 60 degrees in the circumferential direction of the skirt portion 22.

[0020] As shown in Figures 1 and 3, the skirt connected portion 24a is the portion to which the inner connecting portion 60 is connected, and is formed to extend in the circumferential direction (i.e., the circumferential width is longer than the vertical width). As shown in Figures 3 and 6, the cap side engagement portion 24b is formed to protrude from the inner surface of the skirt flap portion 24, and when the cap is closed, it engages with the container side engagement portion C2 that protrudes from the outer surface of the container mouth portion C, thereby preventing the stoppering cap 10 from coming off the container mouth portion C.

[0021] As shown in FIGS. 1 to 3, the slit 22a penetrates the skirt portion 22 in the thickness direction and is formed along the vertical direction so as to reach the lower end of the skirt portion 22. As shown in FIG. 1, the upper end of the slit 22a is located above the inner periphery side connecting portion 60 (skirt connected portion 24a).

[0022] The outer wall 30 has an overall tubular (cylindrical in this embodiment) shape, and as shown in Figures 1 to 3, has a C-ring-shaped outer wall main body portion 31 arranged on the outer circumferential side of the skirt portion 22, and a handle side wall portion 32 arranged between one circumferential end and the other circumferential end of the outer wall main body portion 31.

[0023] As shown in Figure 1, the outer wall main body portion 31 has a portion located above the cap main body 20, and in this embodiment, the upper end of the outer wall 30 is located protruding above the cap main body 20 throughout the entire circumferential direction, thereby preventing external forces such as impacts and loads from acting directly on the cap main body 20 even if a container equipped with the stoppering cap 10 is dropped or stacked.

[0024] In addition, as shown in Figures 1 and 6, the lower ends of the outer wall main body portion 31 and the handle side wall portion 32 are configured to abut against the upper surface of a neck ring C1 that protrudes from the outer surface of the container mouth portion C when the container is closed. As shown in Figures 1 and 3, multiple cutouts 31a are formed at the lower end of the outer wall main body 31, and these cutouts 31a function as areas that improve water drainage during shower processing to clean the stopper cap 10.

[0025] As shown in FIGS. 1 to 3, the handle side wall portion 32 is connected to the skirt flap portion 24 by a first inner peripheral side connecting portion 60, and is also connected to the operating handle 40 by an outer peripheral side connecting portion 50. As shown in Figures 1 to 3, one circumferential end of the handle side wall portion 32 is connected to one circumferential end of the outer wall main body portion 31 by a TE bridge 70 that is intended to break, and the other circumferential end is connected to the other circumferential end of the outer wall main body portion 31.

[0026] Furthermore, as shown in Figures 2 and 3, one circumferential end of the handle side wall portion 32 is connected to one circumferential end of the skirt main body portion 23 by a bridge 80 intended to break, and the other circumferential end is connected to the other circumferential end of the skirt main body portion 23. Specifically, in this embodiment, as shown in Figures 2 and 3, the handle side wall portion 32 is arranged so that one end side and the other end side in the circumferential direction overlap the outer circumferential side of the skirt main body portion 23 with a gap therebetween, and the breakable bridge 80 is formed so as to connect the inner circumferential surface of the handle side wall portion 32 and the outer circumferential surface of the skirt main body portion 23.

[0027] As shown in FIG. 1, the handle side wall portion 32 is formed so that the height of its upper side portion is lower than that of the outer peripheral wall main body portion 31. The handle side wall portion 32 is formed so that the height of its upper portion is lower than the top surface of the main body top surface portion 21 . Moreover, the handle side wall portion 32 is preferably formed as a region having an angle range of 10 to 75 degrees in the circumferential direction of the outer peripheral wall 30.

[0028] As shown in Figure 1, the operating handle 40 has a lever portion 41 extending downward from the outer circumferential connecting portion 50 (the connecting point with the outer circumferential connecting portion 50), and an extension portion 42 extending upward from the outer circumferential connecting portion 50 (the connecting point with the outer circumferential connecting portion 50).

[0029] As shown in Figure 1, a portion of the extension portion 42 (the upper end portion) is positioned opposite to or in contact with the handle side wall portion 32 (the upper portion) (in this embodiment, it is positioned opposite to and in contact with the handle side wall portion 32), and is formed so that a portion of it abuts against the handle side wall portion 32 during the cap opening operation, as shown in Figures 4 and 5.

[0030] As shown in Figures 1 to 3, the outer peripheral connecting portion 50 is a portion that connects the handle side wall portion 32 and the operating handle 40, and in this embodiment, the handle side wall portion 32 and the operating handle 40 are connected at two locations that are circumferentially spaced apart. As shown in Figures 1 to 3, the outer peripheral connecting portion 50 is formed to extend in the circumferential direction (i.e., the circumferential width is longer than the vertical width), and is formed to be bendable (elastically deformable) so that, when a user moves the lever portion 41 toward the front (outer peripheral side) to perform an opening operation, as shown in Figures 4 and 5, the extension portion 42 moves toward the handle side wall portion 32 and the operating handle 40 tilts so that the lever portion 41 moves away from the handle side wall portion 32.

[0031] As shown in Figures 1 to 3, the first inner connecting portion 60 is formed to extend in the circumferential direction (i.e., its circumferential width is longer than its vertical width), and is a portion that connects the skirt flap portion 24 and the handle side wall portion 32. As shown in Figure 1, the upper end surface of the first inner connecting portion 60 extends inward, continuing from the upper end surface of the handle side wall portion 32, and is connected to the outer surface of the skirt flap portion 24 at a position lower than the upper end of the slit 22a.

[0032] As shown in FIGS. 2 and 3, the second inner peripheral side connecting portion 61 is formed as a portion that connects the skirt main body portion 23 and the outer peripheral wall main body portion 31. In this embodiment, the second inner connecting portion 61 is formed in multiple locations spaced apart in the circumferential direction, as shown in Figures 2 and 3, in consideration of drainage during shower processing to clean the stoppering cap 10, but it may also be formed so as to be continuous in the circumferential direction.

[0033] As shown in Figures 1 to 3, the TE bridge 70 connects the outer wall main body portion 31 and the handle side wall portion 32 near the lower end of the outer wall 30, and as shown in Figure 5, it is a portion that is broken during the opening operation, thereby providing a so-called tamper-evident function that prevents the stopper cap 10 from being opened illicitly during the distribution process, etc.

[0034] The bridge 80 to be broken connects the skirt main body 23 and the handle side wall 32, and is a portion to be broken during the bottle opening operation. As shown in Figures 2 and 3, each bridge 80 to be broken has at least two bridge pieces 81 formed so that their vertical positions are different from each other, and in this embodiment, it has three bridge pieces 81 formed so that their vertical positions become higher as they move outward in the circumferential direction. Furthermore, in the unopened state, the bridge 80 to be broken connects the skirt main body 23 in a circular ring shape in the circumferential direction via the handle side wall 32, so that sufficient engagement force with the container opening C is ensured.

[0035] Next, the operation of the stoppering cap 10 of this embodiment during the opening operation will be described below mainly with reference to FIGS.

[0036] First, when opening the stopper cap 10, the user moves the lever portion 41 toward the outer periphery. As shown in Figures 4 and 7, when the lever portion 41 is moved toward the outer periphery, the outer periphery connecting portion 50 bends, and the operating handle 40 tilts so that the extension portion 42 moves toward the handle side wall portion 32 and the lever portion 41 moves away from the handle side wall portion 32, and the extension portion 42 abuts against the handle side wall portion 32.

[0037] Next, when the user continues to move the lever portion 41 toward the outer periphery, as shown in Figure 5, the TE bridge 70 connecting the outer periphery wall main body portion 31 and the handle side wall portion 32 and the breakable bridge 80 connecting the skirt main body portion 23 and the handle side wall portion 32 break.

[0038] In this case, it is possible to utilize the principle of leverage, with the extension portion 42 abutting against the handle side wall portion 32 as the fulcrum, the outer peripheral connecting portion 50 as the point of action, and the lever portion 41 as the force point, so that with a light force, the TE bridge 70 and the bridge to be broken 80 can be broken, and the handle side wall portion 32 and skirt flap portion 24 can be pulled toward the outer periphery.

[0039] Next, when the user continues to pull the lever portion 41 toward the outer periphery (and upward), the skirt flap portion 24 is pulled toward the outer periphery so that the lower side of the skirt flap portion 24 moves toward the outer periphery, resulting in the disengagement of the cap side engagement portion 24b from the container mouth portion C and creating a gap between the outer seal ring portion 21a and the upper end portion of the container mouth portion C, allowing the gas inside the container to be released to the outside through this gap.

[0040] Next, the user can lift the lever portion 41 upward to disengage the cap side engagement portion 23a of the skirt main body portion 23 from the container mouth portion C, and remove the stopper cap 10 from the container mouth portion C to open it.

[0041] In the stopper cap 10 of this embodiment obtained in this manner, the skirt flap portion 24 and the handle side wall portion 32 connected to the operating handle 40 are formed so as to move independently of the outer peripheral wall main body portion 31, so that when opening the cap, it is possible to reduce the operating force required to move the skirt flap portion 24 toward the outer periphery, thereby improving operability when opening the cap.

[0042] Furthermore, since the skirt flap portion 24 is configured to be able to move independently of the skirt main body portion 23, it is possible to reduce the operating force required to open the cap. In addition, when opening the cap, the skirt flap portion 24 can be moved independently of the skirt main body portion 23 while maintaining the engagement of the cap side engagement portion 23a of the skirt main body portion 23 with the container mouth portion C, thereby allowing the gas inside the container to be released to the outside. This prevents the stopper cap 10 from being blown off by the gas pressure inside the container when it is opened, a phenomenon known as blow-off.

[0043] Furthermore, if the skirt portion 22 does not have a slit 22a and is connected in a cylindrical shape, when a part of the skirt portion 22 is moved toward the outer periphery during opening, the skirt portion 22 will deform to become flat, and a part of the skirt portion 22 will move toward the inner periphery. As a result, the engagement between the cap side engagement portion 23a formed on the inner periphery of the part that has moved toward the inner periphery and the container mouth C will become stronger, making it difficult to remove the stopper cap 10 from the container mouth C. However, in this embodiment, the skirt flap portion 24 is configured to be able to move independently of the skirt main body portion 23, thereby avoiding the above-mentioned deformation of the skirt portion 22 (skirt main body portion 23) and reducing the operating force required for opening.

[0044] Furthermore, one circumferential end of the handle sidewall portion 32 is connected to one circumferential end of the outer peripheral wall main body portion 31 by the TE bridge 70 that is to be broken, and the other circumferential end is connected to the other circumferential end of the outer peripheral wall main body portion 31. As a result, not only can tamper-evident properties be ensured by the TE bridge 70 that breaks when the cap is opened, but also, since the outer peripheral wall main body portion 31 (and the handle sidewall portion 32) can be prevented from spreading outward before opening, the engagement of the cap side engaging portion 23a (and the cap side engaging portion 24b) with the container mouth portion C can be reliably maintained, and after the TE bridge 70 is broken, the skirt main body portion 23 (and the skirt flap portion 24) is allowed to spread outward, loosening the engagement of the cap side engaging portion 23a (and the cap side engaging portion 24b) with the container mouth portion C and reducing the operating force required for opening the cap.

[0045] Furthermore, as mentioned above, the bridge 80 to be broken is configured to be broken with a small operating force during the opening process by utilizing the principle of leverage. Therefore, even if the strength of the bridge 80 to be broken is increased and the airtightness using the bridge 80 to be broken is improved, the bridge 80 to be broken can be broken smoothly, making it easier to balance the airtightness and openability using the bridge 80 to be broken.

[0046] In addition, since the height of the upper part of the handle side wall portion 32 is formed lower than that of the outer wall main body portion 31, it is possible to shorten the distance between the contact point between the handle side wall portion 32 and the extension portion 42, which functions as a fulcrum, and the outer side connecting portion 50, which functions as a point of action, during the opening operation, thereby enabling a smooth opening operation to be achieved with a small operating force.

[0047] The outer peripheral wall 30 also has a handle-side wall 32 connected to the skirt flap 24 and the operating handle 40, and one circumferential end of the handle-side wall 32 is connected to one circumferential end of the skirt main body 23 by a bridge 80 to be broken, and the other circumferential end of the handle-side wall 32 is connected to the other circumferential end of the skirt main body 23. As a result, before opening, the bridge 80 to be broken can prevent the skirt main body 23 (and the skirt flap 24) from spreading outward, thereby reliably maintaining the engagement of the cap-side engaging portion 23a (and the cap-side engaging portion 24b) with the container opening C. After the bridge 80 to be broken, the skirt main body 23 (and the skirt flap 24) is allowed to spread outward, loosening the engagement of the cap-side engaging portion 23a (and the cap-side engaging portion 24b) with the container opening C and reducing the force required for opening the container.

[0048] Furthermore, since each bridge 80 to be broken has at least two bridge pieces 81 formed so that their vertical positions are different from each other, it is possible to stagger the timing at which each bridge piece 81 breaks when the bottle is opened, thereby ensuring the connecting strength of the bridge 80 to be broken while keeping the force (peak force) required to break the bridge 80 low.

[0049] The above describes in detail an embodiment of the present invention, but the present invention is not limited to the above embodiment, and various design modifications can be made without departing from the present invention as described in the claims, such as forming a stopper cap 10 by any combination of the configurations of the above or below embodiments and modified examples.

[0050] For example, in the above-described embodiment, the extension portion 42 is described as being positioned opposite and spaced apart from the handle side wall portion 32 and is formed so as to abut against the handle side wall portion 32 during the opening operation, but the extension portion 42 may also be configured to abut against the handle side wall portion 32 from the beginning (before the opening operation).

[0051] Furthermore, in the above-described embodiment, the skirt flap portion 24 is provided with the cap side engaging portion 24b, but the cap side engaging portion 24b may not be provided. [Explanation of symbols]

[0052] 10. Stopper cap 20 ··· Cap body 21 Top of the main body 21a: Outer seal ring (seal) 21b: Inner seal ring (seal) 21c Notch 22 ··· Skirt part 22a Slit 23 Skirt body 23a Cap side engagement portion 24 Skirt flap 24a Skirt connection part 24b Cap side engagement part 30 ... outer wall 31 ... Outer wall main body part 31a Notch 32 Handle side wall 40 Operating handle 41 Lever section 42 ··· Extension part 50 Outer periphery connection part 60 ... 1st inner peripheral side connection part 61 ... 2nd inner connection part 70 TE Bridge 80 ··· Bridge expected to break 81 Bridge piece C...Container opening C1 ··· Neck Ring C2 ... Container side engaging part C2

Claims

1. A stoppering cap comprising: a cap body to be attached to a container opening; an outer peripheral wall disposed on the outer peripheral side of the cap body and connected to the cap body; and an operating handle disposed on the outer peripheral side of the outer peripheral wall and connected to the outer peripheral wall, the cap body has a body top surface portion including a seal portion that can be tightly fitted to the container opening, and a skirt portion formed on the outer periphery of the body top surface portion, The skirt portion has a skirt main body portion separated by a pair of slits formed in the circumferential direction thereof and a pivotable skirt flap portion, the skirt body has a cap side engaging portion on its inner circumferential surface that engages with the container opening, the outer peripheral wall includes an outer peripheral wall main body portion disposed on the outer peripheral side of the skirt portion, and a handle side wall portion disposed between one end and the other end in the circumferential direction of the outer peripheral wall main body portion and connected to the skirt flap portion by an inner peripheral side connecting portion, The stoppering cap is characterized in that the handle side wall portion and the operating handle are connected by an outer peripheral side connecting portion.

2. The stopper cap described in claim 1, characterized in that one circumferential end of the handle side wall portion is connected to one circumferential end of the outer wall main body portion by a TE bridge that is intended to break, and the other circumferential end of the handle side wall portion is connected to the other circumferential end of the outer wall main body portion.

3. 2. The stopper cap according to claim 1, wherein the skirt flap has a cap-side engaging portion on its inner circumferential surface that engages with the container opening.

4. The stopper cap described in claim 1, characterized in that the operating handle has a lever portion extending downward from the outer peripheral connecting portion and an extension portion extending upward from the outer peripheral connecting portion and positioned opposite to or in contact with the handle side wall portion.

5. The handle side wall portion is formed so that the height of its upper side portion is lower than that of the outer peripheral wall main body portion, The stopper cap according to claim 4, wherein the extension is disposed opposite to or in contact with an upper side portion of the handle side wall.

6. The stopper cap described in claim 1, characterized in that the upper end surface of the inner connecting portion extends inwardly from the upper end surface of the handle side wall portion and is connected to the outer surface of the skirt flap portion at a position lower than the upper end of the slit.

7. 2. The stopper cap according to claim 1, wherein the outer peripheral wall main body portion has a portion positioned above the cap body.

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