TWI827668B - cover - Google Patents

Abstract

A lid (1) including: a lid body (11) having a disc-shaped top plate portion (21) and a cylindrical edge portion (22) provided on the peripheral portion of the top plate portion (21); and a sealing member (12) , is a separate entity from the cover body (11), and is arranged in the cover body (11) opposite to the top plate portion (21). The outer diameter is formed to be smaller than the inner diameter of the edge portion (22); the round edge portion (32) , is provided on the edge portion (22), restricts and supports the movement of the sealing member (12) in the direction away from the top plate portion (21), and protrudes annularly toward the radial inner side of the edge portion (22); and the slit portion (33) ), is provided on the circular edge portion (32).

Description

cover

This invention relates to lids for closing can containers.

Conventionally, caps for sealing the mouth of a can container have a structure in which a sealing member made of a resin material that is in close contact with the mouth is provided on the inner surface of the cap body. In addition, Japanese Patent Application Laid-Open No. 2017-178421 discloses a technology for forming such a cap in a non-adhesive manner in order to reduce the opening torque when opening the cap. When the sealing member is formed to be non-adhesive in this way, the sealing member is locked so that the sealing member does not fall off by forming a locking protrusion protruding inward at the edge of the cover body.

In addition, when the lid is used for a positive-pressure tank in which the internal pressure of the tank is positive, a ventilation gap is formed in the lid in order to release the internal pressure when opening. [Prior technical literature] [Patent Document]

Patent Document 1 Japanese Patent Application Publication No. 2017-178421

[Problem to be solved by the invention]

However, when the ventilation slit is provided in the cover, there is a concern that when the lid is opened through the cut end of the ventilation slit, discomfort may occur on the hand, and the tactile feel during opening may be reduced. In addition, there is a concern that the contents and the gas in the tank will fly out from the ventilation gap when it is opened, so technology is needed to prevent the contents from flying through the ventilation gaps.

Therefore, an object of the present invention is to provide a cover that can improve the tactile feel when opening and suppress scattering of contents. [Technical means to solve problems]

As one aspect of the present invention, a cap includes: a cap body having a disk-shaped top plate portion and a cylindrical edge portion provided on a peripheral portion of the top plate portion; and a sealing member that is a separate entity from the cap body and is different from the cap body. The top plate portion is disposed oppositely in the cover body, and the outer diameter is formed to be smaller than the inner diameter of the edge portion; the round edge portion is disposed on the edge portion to restrict the movement of the sealing member in a direction away from the top plate portion. It is supported and annularly protrudes toward the radial inner side of the edge portion; and the slit portion is provided on the circular edge portion. [Effects of the invention]

According to the present invention, it is possible to provide a cover that can improve the tactile feel when opening and suppress scattering of contents.

Hereinafter, the cover 1 according to one embodiment of the present invention will be described using FIGS. 1 to 6 . FIG. 1 is a partially cross-sectional side view showing the structure of the cover 1 according to the first embodiment of the present invention. FIG. 2 is a side view showing the structure of the cover 1 . Fig. 3 is a cross-sectional view showing a structure of the cover 1 partially omitted. FIG. 4 is a cross-sectional view showing the structure of an important part of the cap 1 and the movement of gas in the tank container 100 when the cap 1 is away from the mouth 110 of the tank container 100 . FIG. 5 is a cross-sectional view showing the structure of the cap body 11 used for the cap 1 along the line V-V in FIG. 2 . FIG. 6 is a cross-sectional view showing the structure of the circular edge portion 32 and the slit portion 33 of the cover body 11 along the line VI-VI in FIG. 2 , with other structures partially omitted.

As shown in FIG. 1 , the cap 1 is attached to the mouth 110 of the can container 100 , and is sealed and fixed while being put on the mouth 110 of the can container 100 , thereby sealing the can container 100 .

Here, the can container 100 is a so-called bottle-type container that stores beverages and the like. For example, the tank container 100 is made of a metal material such as an aluminum alloy and a surface-treated steel plate in which a resin film is laminated on both surfaces. The tank container 100 is formed into a cylindrical shape with a different outer diameter in which one end portion is reduced in diameter. The can container 100 has a mouth 110 at one end thereof for discharging the stored beverage. The mouth portion 110 has a lower jaw portion 111, a male screw portion 112, and a curled portion 113 on its outer peripheral surface from the bottom surface side of the can container 100 toward the end.

The lower jaw 111 is formed by an annular protrusion. The curled portion 113 is formed to have a smaller diameter than the male screw portion 112 . In addition, the outer diameter of the curled portion 113 is smaller than the inner diameter of the cover 1 . The curled portion 113 is formed by folding the end of the mouth portion 110 more than once. The curled portion 113 is an opening configured to discharge the beverage stored in the can container 100 .

As shown in FIGS. 1 to 4 , the cap 1 includes a cap body 11 and sealing members 12 that are separately provided in the cap body 11 .

The cover body 11 is made of a material in which a resin film layer is formed on a metal material such as an aluminum alloy. The cover body 11 is formed by molding the thin flat plate-shaped material into a cup shape by performing various processes such as stretch molding, knurl molding, and roll molding.

The cover body 11 includes a disc-shaped top plate portion 21 and a cylindrical edge portion 22 integrally provided on the peripheral edge portion of the top plate portion 21 . The cover body 11 is configured such that the top plate portion 21 and the edge portion 22 are annular and are connected integrally with the curved corner portions 23 .

The top plate portion 21 is disk-shaped and has a flat main surface. One end of the edge part 22 is connected to the top plate part 21 via the corner part 23, and the other end is open. The edge portion 22 is provided from the end on the top plate portion 21 side to the front end of the opening: a plurality of recessed portions 31, a round edge portion 32, a plurality of slit portions 33, a female screw portion 34, and a tamper-resistant belt portion. 35.

As shown in Figures 1 to 6, the plurality of recessed portions 31, the round edge portions 32, the plurality of slit portions 33, the female screw portions 34 and the tamper-proof belt portions 35 are formed by forming the top plate portion 21; The cylindrical edge portion 22 of the recessed portion 31, the round edge portion 32, the plurality of slit portions 33, the female screw portion 34 and the tamper-resistant belt portion 35; and the corner portion 23 are knurled. And formed by processes such as roll forming.

As shown in FIGS. 1 , 2 and 5 , a plurality of recessed portions 31 are provided between the top plate portion 21 and the circular edge portion 32 of the edge portion 22 . The plurality of recessed portions 31 are, for example, arranged at equal intervals in the circumferential direction of the edge portion 22 . The plurality of recessed portions 31 are formed such that the dimension in the axial direction of the cover 1 is longer than the dimension in the circumferential direction of the cover 1 .

As shown in FIGS. 1 , 2 , 4 and 6 , the circular edge portion 32 is formed in an annular shape. The circular edge portion 32 is formed on the front end side of the edge portion 22 rather than the plurality of recessed portions 31 and annularly protrudes radially inward through the edge portion 22 . The inner diameter of the rim portion 32 is smaller than the outer diameter of the sealing member 12 . Therefore, the round edge portion 32 is a locking portion configured to preliminarily restrict the movement of the top plate portion 21 in a direction away from the sealing member 12 arranged on the top plate portion 21 . Specifically, as shown in FIGS. 1 , 3 , and 4 , the rim portion 32 is set to have an inner diameter that is the smallest, smaller than the outer diameter of the sealing member 12 , and from this position. The portion up to the edge portion 22 is inclined relative to the axis of the edge portion 22 .

As shown in FIGS. 1 , 2 , 4 and 6 , a plurality of slit portions 33 are provided in the circular edge portion 32 . The plurality of slit portions 33 are arranged at equal intervals along the circumferential direction of the circular edge portion 32 . For example, the slit portions 33 are provided at eight locations in the circumferential direction at equal intervals in the circular edge portion 32 . The slit portion 33 is formed by a partial cutout provided in the circular edge portion 32 . The slit 33 releases the internal pressure of the sealed can container 100 when the lid 1 is opened and the lid 1 is removed from the can container 100 .

As shown in FIGS. 1 , 3 , and 4 , the slit portion 33 is provided at a position closer to the front end side of the edge portion 22 than a portion that is the innermost peripheral portion in the radial direction of the circular edge portion 32 . In other words, the slit portion 33 is provided closer to the front end side of the edge portion 22 than the portion where the inner diameter of the circular edge portion 32 becomes the smallest diameter. The slit portion 33 is formed by a partial cutout provided in the circular edge portion 32 and extending in the circumferential direction. Therefore, as shown in FIGS. 1 , 3 and 4 , the slit portion 33 has a first end portion 33 a on the top plate portion 21 side and a second end portion 33 b on the front end side of the edge portion 22 .

The first end portion 33a and the second end portion 33b of the slit portion 33 are formed from a part of the circular edge portion 32. The first end portion 33 a is radially inward and extends from the top plate portion 21 side toward the front end side of the edge portion 22 . In other words, as shown in FIG. 4 , when the lid 1 is placed on the mouth 110 of the can container 100 , with the can container 100 being the lower part and the lid 1 being the upper part, the first end 33 a is the lid 1 inside and extending downward.

In addition, for example, as shown in FIG. 4 , the front end of the first end portion 33 a is bent toward the axial direction of the cover 1 and extends toward the front end of the cover 1 in the axial direction of the cover 1 . Here, the front end of the first end portion 33a extends toward the front end of the cover 1 in the axial direction. The extended length of the first end portion 33a does not need to have a predetermined length. In order to make the front end of the first end portion 33a face the axial direction, It is sufficient that the front end faces the axis direction through the partial bending of the first end 33a.

The second end portion 33b is radially inward and extends from the front end side of the edge portion 22 toward the top plate portion 21 side. In other words, as shown in FIG. 4 , when the lid 1 is placed on the mouth 110 of the can container 100 , the second end 33 b is the lid 1 when the can container 100 is positioned downward and the lid 1 is positioned upward. inside and extending upward.

In such a slit portion 33, as shown in FIG. 4, the front end of the first end portion 33a is located further inside than the front end of the second end portion 33b in the radial direction of the edge portion 22. That is, the slit portion 33 is located closer to the center side of the edge portion 22 than the front end of the second end portion 33b of the first end portion 33a.

The female screw part 34 is configured to be screwably engaged with the male screw part 112 of the tank container 100 . The female screw portion 34 is integrally formed with the can container 100 . That is, the female screw portion 34 is not yet formed on the lid 1 before being attached to the can container 100, and is formed when it is integrated with the can container 100.

As shown in FIGS. 1 and 2 , the tamper-resistant belt portion 35 is engaged with the lower jaw portion 111 of the can container 100 in the direction in which the cover 1 is away from the can container 100 and in the axial direction of the cover 1 . In addition, the tamper-proof tape portion 35 has a breaking portion 35 a that breaks when the cover 1 is opened and is used to separate from the edge portion 22 . That is, the tamper-proof tape portion 35 is formed by leaving the broken portion 35a on the end side of the edge portion 22 to form a gap. Like the female screw portion 34, when it is integrally combined with the can container 100, it is provided with a slit. It is shaped like the lower jaw part 111 of the can container 100, and is engaged with the lower jaw part 111.

As shown in FIG. 3 , the sealing member 12 is configured as a separate entity from the cap body 11 . That is, the sealing member 12 is disposed relative to the top plate portion 21 and the edge portion 22 and is not in contact with the cover 1 . Specifically, as shown in FIGS. 1 , 3 and 4 , the sealing member 12 is configured in a disk shape and has a circular edge portion 32 with a diameter set to be larger than the edge portion 22 of the cover body 11 . The inner diameter is larger than the outer diameter. In addition, the sealing member 12 is set to have an outer diameter that is the same as or slightly smaller than the diameter of a connecting circle that contacts the inner surfaces of the plurality of recessed portions 31 provided on the edge portion 22 of the cover body 11 .

The sealing member 12 is integrally provided with the circular edge portion 32 protruding from the inner circumferential surface of the edge portion 22 in the radial direction, and is engaged in the axial direction of the cover body 11 to limit falling off from the cover body 11 in the axial direction. On the cover body 11. In addition, the sealing member 12 comes into contact with the inner surfaces of the plurality of recessed portions 31 of the edge portion 22 and engages with the cover body 11 in the radial direction, so that the center of the sealing member 12 is located in a predetermined range on the axis of the cover body 11 way to center.

The sealing member 12 includes a disc-shaped sliding layer 41 and a disc-shaped sealing layer 42 laminated on the sliding layer 41 in volume. The sealing member 12 is formed by integrally molding the sliding layer 41 and the sealing layer 42 from different resin materials. The sealing member 12 includes, for example, a flat plate portion 12a with a uniform thickness, and a curved surface portion 12b whose outer peripheral edge on the top plate portion 21 side has a curved surface. In other words, the sealing member 12 is formed in a disk shape, and the edge portion on the top plate portion 21 side is formed as a curved surface with a predetermined curvature. In addition, the sealing member 12 is configured such that the thickness of the curved portion 12b constituting the outer peripheral edge side is thinner than that of the flat plate portion 12a, and the thickness of the curved portion 12b gradually becomes thinner from the center side toward the outer peripheral edge. The front end of the curved portion 12b, that is, the outer peripheral edge Made to be thinnest compared to other parts. The flat plate portion 12a is a sealing portion configured so that a part on the side of the curved surface portion 12b comes into contact with the mouth portion 110 of the can container 100 . The flat plate portion 12a is configured such that the sealing portion is thicker than other portions, for example.

The sliding layer 41 is made of a resin material with a relatively higher hardness (harder) than the sealing layer 42 . In addition, the sliding layer 41 is made of a resin film layer that covers the main body 11 and a resin material that does not have adhesiveness or adhesiveness. That is, the sliding layer 41 is not in contact with the top plate portion 21 and slides the top plate portion 21 while in contact with the top plate portion 21 .

Examples of resin materials used for the sliding layer 41 include olefin-based resins such as polypropylene resin and polyethylene resin, polyester-based resins such as polyethylene phthalate, styrene-based resins, and acrylic resins. In this embodiment, the sliding layer 41 is made of polypropylene resin, for example. In addition, pigments, lubricants, softeners, etc. may be appropriately added to the resin material used for the sliding layer 41 .

The sliding layer 41 faces the top plate portion 21 of the cover body 11 and is provided in a separate body from the cover body 11 . The sliding layer 41 is made of a resin material and is configured to be slidable with the top plate portion 21 of the cover body 11 . The sliding layer 41 is configured in a disc shape. The outer diameter of the sliding layer 41 is smaller than the inner diameter of the edge portion 22 and smaller than the inscribed circles of the plurality of recessed portions 31 , and is configured to be larger than the smallest inner diameter of the circular edge portion 32 .

The sliding layer 41 includes: a first flat plate portion 41a having a uniform thickness; a first curved portion 41b in which the outer surface of the outer peripheral edge on the top plate portion 21 side is a curved surface; and a protruding portion 41c provided in the first curved portion. The sealing layer 42 side of 41b. The first flat plate portion 41 a is configured to have a uniform thickness from the center of the sliding layer 41 to a portion further outer than the portion facing the curled portion 113 of the mouth portion 110 .

The thickness of the first curved surface portion 41 b is gradually reduced toward the outer peripheral edge from the outer peripheral side of the portion facing the curled portion 113 of the mouth portion 110 to the outer peripheral edge. The protruding portion 41 c is an annular protrusion that is inclined with respect to the axial direction of the sliding layer 41 and the surface direction of the top plate portion 21 and is curved or inclined toward the open end side of the edge portion 22 . The thickness of the protruding portion 41c gradually decreases from the first curved portion 41b toward the front end.

The sealing layer 42 is made of a resin material with a relatively lower hardness (softer) than the sliding layer 41 . Examples of resin materials used for the sealing layer 42 include olefin resins, polyester resins, styrene resins, and acrylic resins. A more suitable example is a mixed material of styrene elastomer and polypropylene resin. , mixed materials of low-density polyethylene and styrene-based elastomers, and polyester-based elastomers, etc. In this embodiment, the sealing layer 42 is made of a mixed material of styrene elastomer and polypropylene resin, for example. In addition, pigments, lubricants, softeners, etc. may be appropriately added to the resin material used for the sealing layer 42 .

The sealing layer 42 is integrally provided on the main surface of the sliding layer 41 on the side opposite to the mouth 110 . The sealing layer 42 is configured in a disc shape. The outer diameter of the sealing layer 42 is larger than the outer diameter of the curled portion 113 of the mouth portion 110 and is substantially the same as the outer diameter of the sliding layer 41 .

The sealing layer 42 includes a second flat plate portion 42a that is thicker at the portion facing the mouth 110 than the other portion, and a second curved portion 42b that has a curved outer surface on the outer peripheral edge of the top plate portion 21 side. ; and the annular recess 42c is provided on the main surface opposite to the sliding layer 41 side of the second curved portion 42b. The main surface of the second flat plate portion 42a facing the curled portion 113 is a flat surface. For example, the second flat plate portion 42 a is configured to have the same diameter as the first flat plate portion 41 a of the sliding layer 41 . The second flat plate portion 42a constitutes the flat plate portion 12a of the sealing member 12 together with the first flat plate portion 41a.

The second curved portion 42b has, for example, a main surface that is the same plane as the main surface of the curled portion 113 facing the second flat portion 42a. The thickness of the second curved surface portion 42 b is gradually reduced toward the outer peripheral edge from the outer peripheral side to the outer peripheral edge than the portion facing the curled portion 113 of the mouth portion 110 . The second curved surface portion 42b is laminated on the first curved surface portion 41b and the protruding portion 41c. The second curved surface portion 42b forms the curved surface portion 12b of the sealing member 12 together with the first curved portion 41b and the protruding portion 41c.

The depression 42c is, for example, an annular depression having a semicircular cross section. The sealing member 12 is locked by contacting the round edge portion 32 when the cover 1 is placed with the top plate portion 21 facing upward and the sealing member 12 falls below the top plate portion 21 . The downward movement of the sealing member 12 in the direction of gravity is restricted. In addition, when the lid 1 is removed from the can container 100, the sealing member 12 is supported by the rim portion 32, thereby moving away from the mouth portion 110 and moving together with the lid body 11.

The manufacturing method of the lid 1 configured in this way will be briefly described below. First, the lid body 11 on the cup is formed, for example, from sheet metal material. Next, the cover body 11 is placed on the lower mold in an attitude such that the top plate portion 21 is located downward in the direction of gravity. Next, the molten or softened resin material for the sliding layer 41 is supplied to the top plate portion 21 , and the supplied resin material is compressed and molded using a mold to form the sliding layer 41 . Next, the melted or softened resin material for the sealing layer 42 is supplied to the sliding layer 41 , and the resin material supplied from the upper mold is compressed and molded to form the sealing layer 42 on the sliding layer 41 . After that, the recessed portion 31, the circular edge portion 32, the slit portion 33, the tamper-resistant belt portion 35, etc. are formed on the edge portion 22 of the cover body 11. For example, the round edge portion 32 is formed by pressing a molding tool with a curved front end against the outer surface of the edge portion 22 . In addition, the slit portion 33 is formed by arranging a molding tool with a blade tip on the outer surface side and the inner surface side of the edge portion 22, sandwiching and shearing the formed round edge portion 32 from the outer surface side and the inner surface side. The cover 1 is manufactured through such steps.

In addition, when the manufactured cap 1 is mounted on the mouth 110 of the can container 100, the top plate part 21 of the cap 1 is in an upward attitude. At this time, the sealing member 12 is positioned at the center of the cover body 11 by contacting the inner surfaces of the plurality of recessed portions 31 . Furthermore, when the sealing member 12 is lowered by a fixed distance, it is supported by the rim portion 32 and its movement in the lowering direction is restricted. In this state, when the cap 1 is placed on the mouth 110 , a predetermined portion of the sealing layer 42 of the sealing member 12 faces the mouth 110 . In this state, the lid 1 is sealed and fixed to the mouth 110 of the can container 100 by stretching the corner portion 23 of the lid body 11 and rolling the edge portion 22 of the lid body 11 .

According to the cover 1 configured in this way, the edge portion 22 is provided with the bead portion 32 for restricting the movement of the sealing member 12 in the axial direction of the cover 1, and the bead portion 32 is provided for releasing the internal pressure of the can container 100. The structure of the gap portion 33. With this structure, since the slit portion 33 is provided in the circular edge portion 32 that is annularly recessed inward from the edge portion 22 , the slit portion 33 is located radially inward of the outer peripheral surface of the edge portion 22 .

Therefore, when the cover 1 is opened, the slit 33 does not come into contact with the fingers, and there is no discomfort caused by the contact of the slit 33 . Therefore, even if the cover 1 is provided with the slit portion 33, the tactile feeling when opening can be improved.

In addition, since the distance from the slit portion 33 to the outer peripheral surface of the edge portion 22 can be ensured, when the internal pressure of the can container 100 is released, the content can be suppressed from scattering together with the gas in the can container 100 .

In addition, the slit portion 33 is disposed at a position where the inner diameter of the circular edge portion 32 is the smallest and closer to the front end side of the edge portion 22 , that is, below the posture in which the can container 100 is installed. Therefore, the edge portion 22 is located It is lower than the gap created by the separation of the sealing member 12 and the mouth part 110 at the time of opening. Therefore, the moving distance of the gas and the contents becomes longer, and the gas and contents move downward from the inside of the can container 100 through the gap between the sealing member 12 and the mouth 110 , and become a flow that moves from the gap 33 into the atmosphere. Therefore, it is possible to prevent the contents from moving toward the slit portion 33 as much as possible, and therefore it is further possible to suppress the scattering of the contents from the slit portion 33 .

Furthermore, the slit portion 33 is such that the front end of the first end portion 33 a is located inside the front end of the second end portion 33 b in the radial direction of the edge portion 22 . Therefore, as shown by the arrows in FIG. 4 , the gas and contents moving downward through the gap between the sealing member 12 and the mouth 110 further move toward the space between the front ends of the first end 33 a and the second end 33 b. Move diagonally upward. As a result, the movement of the contents is blocked by the first end portion 33 a of the slit 33 , and scattering of the contents from the slit 33 can be further suppressed.

In addition, by forming the end portion of the first end portion 33a into a structure extending downward, as shown by the arrow in FIG. 4, due to the movement of gas and contents, the end portion of the first end portion 33a extends from the downward direction. Since the movement is upward, it is possible to further suppress the content from moving from the gap portion 33 .

In other words, by the structure in which the front end of the first end portion 33a is located further inside than the front end of the second end portion 33b in the radial direction of the edge portion 22, and by the structure in which the front end of the first end portion 33a is formed to extend downward, the 1. The front end of the end portion 33a has a function of blocking the liquid, which is the content that moves together with the gas. Thereby, the slit part 33 exerts the effect of suppressing the scattering of contents.

In addition, the cover 1 has a structure in which a plurality of recessed portions 31 are provided closer to the top plate portion 21 than the circular edge portion 32 of the edge portion 22 , so that the sealing member 12 can be centered by the inner surface of the recessed portion 31 . In addition, the plurality of recessed portions 31 in the cover 1 improve the gripping properties of the cover 1 when opening, and can also achieve the effect of preventing the upper portion of the cover 1 from shrinking due to the molding of the round edge portion during manufacturing.

As described above, the lid 1 according to one embodiment of the present invention has a structure in which the slit portion 33 is provided in the round edge portion 32, thereby improving the tactile feel when opening and suppressing scattering of contents.

In addition, this invention is not limited to the above-mentioned embodiment. For example, the slit portion 33 is not limited to the above-described structure. In the above example, the slit portion 33 may be provided only in the circular edge portion 32 that is annularly recessed inward from the edge portion 22 . The slit portion 33 having this structure can also improve the tactile feel of the cover 1 when opening and suppress the contents from scattering. Similarly, the slit portion 33 may have a structure in which the front end of the first end portion 33 a and the front end of the second end portion 33 b are at the same position in the radial direction of the edge portion 22 , or are located outside the edge portion 22 in the radial direction. In addition, the slit portion 33 may have a shape such that the front end of the first end portion 33a and the other portions of the first end portion 33a face the same direction. However, in consideration of suppressing the scattering of the contents, the structure of the slit portion 33 is preferably closer to the front end side of the edge portion 22 than the portion where the inner diameter of the circular edge portion 32 becomes the smallest, and the front end of the first end portion 33a is directed toward the axis. The front end of the first end portion 33a is extended in the radial direction, and the front end of the first end portion 33a is arranged further inward in the radial direction than the front end of the second end portion 33b.

In addition, the present invention is not limited to the above-described embodiment, and various changes can be made at the implementation stage without departing from the gist of the invention. In addition, each embodiment can also be implemented by combining them appropriately, and the combined effect in each case can be obtained. Furthermore, the above-described embodiments include various inventions, and various inventions can be extracted by selecting combinations from the plurality of disclosed structural elements. For example, even if a few structural elements are deleted from the total structural elements shown in the embodiments, the problem can still be solved, and when an effect is obtained, the configuration in which these structural elements are deleted can be extracted as the invention.

1: cover 11: Cover the body 12:Sealing components 12a: Flat part 12b: Curved face 21:Roof part 22: Edge part 23: Corner 31: concave part 32: Round edge part 33: Gap part 33a: 1st end 33b: 2nd end 34:Female screw part 35: Tamper-proof belt 35a: fracture part 41: Sliding layer 41a: 1st flat plate part 41b: 1st curved face 41c:Protrusion 42:Sealing layer 42a: 2nd flat plate part 42b: 2nd curved face 42c: depression 100:Can container 110: Mouth 111: Mandible 112: Male screw part 113: Curly part

[FIG. 1] It is a side view which shows the structure of the cover concerning the 1st Embodiment of this invention in partial cross-section. [Fig. 2] is a side view showing the structure of the cover. [Fig. 3] is a cross-sectional view showing the structure of the cover partially omitted. [Fig. 4] is a cross-sectional view showing the structure of an important part of the cover. [Fig. 5] is a cross-sectional view showing the structure of the lid body of the lid. [Fig. 6] is a cross-sectional view showing the structure of the cover body.

1: cover

11: Cover the body

12:Sealing components

12b: Curved face

21:Roof part

22: Edge part

23: Corner

31: concave part

32: Round edge part

33: Gap part

33a: 1st end

33b: 2nd end

34:Female screw part

35: Tamper-proof belt

35a: fracture part

41: Sliding layer

41a: 1st flat plate part

41b: 1st curved face

41c:Protrusion

42:Sealing layer

42a: 2nd flat plate part

42b: 2nd curved face

42c: depression

100:Can container

110: Mouth

111: Mandible

112: Male screw part

113: Curly part

Claims (4)

A lid provided with: a lid body having a disk-shaped top plate portion and a cylindrical edge portion provided at the peripheral edge portion of the top plate portion; and a sealing member that is a separate entity from the lid body and is non-adherent to the lid body. , is provided in the cover body opposite to the top plate portion, and has an outer diameter smaller than the inner diameter of the edge portion; the round edge portion is the sealing member provided on the edge portion and restricts the direction away from the top plate portion. The movement and support of the edge portion annularly protrudes toward the radial inner side of the edge portion; and a slit portion is provided in the aforementioned circular edge portion, and the aforementioned slit portion is formed closer than a portion having the smallest inner diameter of the aforementioned circular edge portion. The front end side of the aforementioned edge portion. The cover according to claim 1, wherein the slit portion has a first end portion on the top plate side and a second end portion on the front end side of the edge portion, and the first end portion is located farther than the aforementioned edge portion. The second end portion is further radially inward of the edge portion. The cap according to claim 2, wherein the front end of the first end portion extends toward the front end of the edge portion along the axial direction of the edge portion. The cap according to claim 1, further comprising: a plurality of recessed portions provided in the edge portion closer to the top plate portion than the circular edge portion in the circumferential direction.

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