JP2023114233A - Can lid and beverage can - Google Patents

Abstract

To release pressure inside a beverage can, which increases by shaking the beverage can, to outside without forming a drinking mouth.SOLUTION: As a score line 600, a first score line 680 and a second score line 690 are provided. By rotating a tab 500 clockwise by 90° around a rivet 900 which is a center of rotation, the second score line 690 is positioned as an opposite position to a center line C of the tab 500. The second score line 690 is used to form a pressure relief portion for releasing a pressure inside a beverage can 100 that is increased by shaking the beverage can 100, to outside.SELECTED DRAWING: Figure 1

Description

The present invention relates to can lids and beverage cans.

Patent Literature 1 discloses a can lid and canned food in which a vent can be opened simultaneously by a series of operations of a tab that opens a main opening, and the opening operation can be easily and reliably performed.

JP 2021-102463 A

For a beverage can containing a carbonated beverage, by shaking the beverage can and then releasing the pressure inside the beverage can to the outside, the proportion of gas contained in the carbonated beverage can be reduced, and the user feels when drinking the carbonated beverage. Can reduce irritation.
As a mode for releasing the pressure inside the beverage can to the outside, for example, there is a mode in which the can lid is formed with a mouthpiece, and the pressure inside the beverage can is released to the outside through this mouthpiece.
SUMMARY OF THE INVENTION It is an object of the present invention to release to the outside the pressure inside a beverage can that increases when the beverage can is shaken without forming a drinking spout.

The can lid to which the present invention is applied is a can lid that can be used for a beverage can containing a carbonated beverage, and includes a base material and a first material formed on the base material and promoting breakage of the base material. A score line, which is a first score line used to form a drinking spout, and a second score line formed on the base material to promote breakage of the base material, wherein the beverage can is shaken to and a second score line used to form a pressure relief portion for releasing pressure build-up inside the beverage can to the outside.
Here, the second score line may be shorter than the first score line.
The tab may further comprise a tab used to form the mouthpiece, wherein the tab causes breakage of the base material at the second score line, and the second score line is shorter than the width dimension of the tab. You may
Further, a tab used for forming the mouthpiece is further provided, the tab is provided rotatably around a predetermined center of rotation, and when the tab is rotated around the center of rotation, the tab may move along a predetermined annular path, and at least a portion of the second score line may be formed along the annular path.
In addition, the base material has an outer peripheral edge, and the tab presses a portion of the base material located closer to the rotation center than the second score line. A bead that enhances the rigidity of the base material may be provided on the outer peripheral edge side of the second score line.
In addition, the base material has an outer peripheral edge, and the tab presses a portion of the base material located closer to the outer peripheral edge than the second score line, A bead that enhances the rigidity of the base material may be formed on the center of rotation side of the score line 2 .
Also, the second score lines may be formed in an enclosed area surrounded by the first score lines in the base material.
A tab used for forming the mouthpiece is further provided, and the second score line is a center line along the longitudinal direction of the tab that is arranged to face the portion where the mouthpiece is formed. , or may be provided at a location away from the facing position of the extension line of the center line.
Further, the tab is provided rotatably about a predetermined center of rotation, and by rotating the tab about the center of rotation, the tab can be positioned opposite to the center line or the extension line. score lines may be positioned.
Also, the second score lines may be formed outside an enclosed area that is an area surrounded by the first score lines.
Further, a tab used to form the drinking spout is further provided, and the tab is rotatably provided around a predetermined rotation center, and is formed outside the enclosed area by rotating the tab. The breakage of the base material at the second score line that is set may be performed using the tab.
Also, the second score line may be provided in the vicinity of the center of rotation.
Also, the depth of the second score line may be greater than the depth of the first score line.
In addition, the pressure formed by breaking the base material at the second score line is greater than the area of the mouthpiece formed by breaking the base material at the first score line. The relief portion may have a smaller area.
Further, the pressure relief portion formed by breaking the base material along the second score line may be a slit.
In addition, a tab used to form the mouthpiece is further provided, and the tab is provided rotatably around a predetermined rotation center, and by rotating the tab around the rotation center, the second The base material is provided with a shape and/or information indicating that the breaking of the base material at the score line can be performed by using the tab, and that the tab can be rotated. good too.
Further, a tab used for forming the mouthpiece is further provided, the tab is provided rotatably around a predetermined center of rotation, and the first score line is drawn from the central portion side of the base material. The base material has a portion that bulges toward the outer peripheral edge side, the second score line is formed at a location off a straight line connecting the top of the bulging portion and the center of rotation, and the tab The tip of the tab is arranged so as to be located at a position away from the position facing the straight line, and when the tab is used to break the base material at the position where the second score line is formed, the tab is rotated. The breaking may be performed without an operation.

Further, when the present invention is regarded as a beverage can, the beverage can to which the present invention is applied includes a can body containing a carbonated beverage and a can lid that closes the opening of the can body. A beverage can configured with the above can lid.

ADVANTAGE OF THE INVENTION According to this invention, even if it does not form a drinking spout, the pressure in the beverage can which increases by shaking a beverage can can be released to the outside.

Figure 2 is a top view of a beverage can; It is the figure which expanded and showed the 1st score line. FIG. 10 is a view showing the state of the beverage can when the tab is rotated clockwise by 90°; FIG. 3 is a view showing a beverage can with tabs omitted; (A) and (B) are diagrams showing other configuration examples of beads. FIG. 10 is a diagram showing another configuration example of a beverage can; FIG. 10 is a diagram showing another configuration example of a beverage can; FIG. 10 is a diagram showing another configuration example of a beverage can; FIG. 10 is a diagram showing another configuration example of a beverage can; FIG. 10 is a diagram showing another configuration example of a beverage can; FIG. 10 is a diagram showing another configuration example of a beverage can; FIG. 10 illustrates the condition of the beverage can after the tab has been rotated; FIG. 10 is a diagram showing another configuration example of a beverage can; (A) and (B) are diagrams showing cross-sectional shapes of a first score line and a second score line.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 is a top view of a beverage can 100 to which this embodiment is applied.
The beverage can 100 has a can body 200 (container body, can body) and a can lid 300 .
The can body 200 is formed in a cylindrical shape and has an opening at the top and a bottom at the bottom. The can lid 300 is attached to the opening of the container body 200 and closes the opening.
The beverage can 100 contains carbonated drinks (sparkling drinks) such as beer and soft drinks.

Can lid 300 has panel 400 . This panel 400, which is an example of a base material, is made of a metal plate. Also, the panel 400 is formed in a disc shape and has an outer peripheral edge 401 .
Additionally, the can lid 300 is fitted with a tab 500 that is manipulated by the operator.
One end 505 (upper end in the figure) of the tab 500 is operated (lifted) by the operator, and the other end of the panel 400 is pressed against a predetermined pressing point. 510 (tip) is pressed to press panel 400 .

Tab 500 is formed in a substantially rectangular shape. An end portion 510 (tip portion) of the tab 500 is curved, and the end portion 510 bulges outward from the tab 500 and forms an arc. In other words, end 510 is formed in a semicircular shape.
Also, the tab 500 is formed in a shape that is symmetrical with respect to the center line C along the longitudinal direction of the tab 500 as an axis of symmetry.
In this specification, the upper end portion of the tab 500 in the drawings is hereinafter referred to as the operated portion 505 , and the lower end portion of the tab 500 in the drawings is referred to as the distal end portion 510 .

Tab 500 is secured to panel 400 by rivet 900 provided in central portion 403 of panel 400 . Also, the tab 500 is fixed to the panel 400 with a rivet 900 at a portion located between the operated portion 505 and the distal end portion 510 .
Also, the tab 500 is rotatably provided around a predetermined center of rotation. Specifically, the tab 500 is provided rotatably around a portion supported by the rivet 900 as a center of rotation.

A through hole 505A into which an operator's finger is inserted is formed on the operated portion 505 side of the tab 500 .
Further, a U-shaped through-hole 506 is formed in the tab 500 on the distal end portion 510 side of the through-hole 505A. This through hole 506 has one end 506A, the other end 506B, and a top 506C.
In this embodiment, the one end 506A and the other end 506B are positioned on the tip 510 side of the tab 500, and the top 506C is positioned on the operated part 505 side of the tab 500. FIG.

A tongue-shaped elastic piece 507 is provided in a region surrounded by the through hole 506 (a region located inside the through hole 506).
The elastic piece 507 is connected to the tab main body 500A at the portion located on the tip end portion 510 side, and extends toward the operated portion 505 side of the tab 500 starting from the portion connected to the tab main body 500A. .
Furthermore, in this embodiment, the portion of the tab 500 provided with the elastic piece 507 is fixed to the panel 400 with a rivet 900 .

Further, the panel 400 is formed with a score line 600 that encourages breaking of the panel 400 . Score lines 600 are formed by grooves formed on the surface of panel 400 .
In this embodiment, as the score lines 600, a first score line 680 and a second score line 690 are provided.

In the present embodiment, of the panel 400 , an enclosed area 91 that is an area enclosed by the first score lines 680 is pressed by the distal end portion 510 of the tab 500 .
In other words, in this embodiment, the portion of the panel 400 where the drinking spout is formed is pressed by the distal end portion 510 of the tab 500 .
This causes the panel 400 to break along the first scoreline 680 . When the breakage of the panel 400 along the first scoreline 680 occurs, the panel 400 is formed with a spout (an opening is formed in the portion inside the first scoreline 680). This allows the user to drink the beverage inside the beverage can 100 .
In this embodiment, the tab 500 is thus used to form the spout.

Further, the panel 400 is provided with a recess 710 that is recessed toward the back side of the plane of the drawing in order to increase the rigidity of the panel 400 . Further, the panel 400 is formed with a step 720 surrounding the recess 710 .
In this embodiment, a first scoreline 680 and a second scoreline 690 are formed in the area surrounded by the step 720 of the panel 400, and furthermore, the tab 500 is formed in this area surrounded by the step 720. is provided.

In addition, the panel 400 is provided with an annular bead 730 that increases the stiffness of the panel 400 in the region located inside the first scoreline 680 . In other words, in this embodiment, an annular bead 730 that increases the rigidity of the panel 400 is provided in the surrounded area 91 surrounded by the first score line 680 of the panel 400 .
The bead 730 is formed by a recess that is recessed toward the back side of the can lid 300 . In addition, the bead may be configured by a convex portion protruding toward the surface side of the can lid 300 .
In this embodiment, when panel 400 breaks along first score line 680, a tongue-like region is created, and bead 730 increases the stiffness of this tongue-like region.

FIG. 2 is an enlarged view of the first score line 680. As shown in FIG.
The first score line 680 of this embodiment is provided with a U-shaped portion 650 and a connecting portion 610 connected to the U-shaped portion 650 .
U-shaped portion 650 has one end 651 and another end 652 . One end portion 651 and the other end portion 652 are located on the central portion 403 (see FIG. 1) side of the panel 400 .

Furthermore, the one end portion 651 is provided in one region 671 of the one region 671 and the other region 672 facing each other across the center line C (see also FIG. 1) of the tab 500 . The other end 652 is provided in the other region 672 .
Further, the U-shaped portion 650 is formed so as to swell from the central portion 403 (see FIG. 1) side of the panel 400 toward the outer peripheral edge 401 (see FIG. 1) side, and the top portion 653 extends toward the outer peripheral edge 401 side of the panel 400. have In this embodiment, the first score line 680 thus has a portion that bulges from the central portion 403 of the panel 400 toward the outer peripheral edge 401 of the panel 400 .
In the present embodiment, the apex 653 is located at a portion of the U-shaped portion 650 (bulging portion) that is closest to the outer peripheral edge 401 (see FIG. 1).
In the present embodiment, when the other end 652 of the U-shaped portion 650 is the starting point and the one end 651 is the terminal, the U-shaped portion 650 progresses toward the top 653 and the outer peripheral edge 401 (see FIG. 1). ), and is closest to the outer peripheral edge 401 at the point where the top 653 is located. After passing the top 653 , the U-shaped portion 650 gradually separates from the outer peripheral edge 401 .

The connection portion 610 is connected to the other end portion 652 of the U-shaped portion 650 , and progresses toward the one end portion 651 side of the U-shaped portion 650 starting from the point where it is connected to the U-shaped portion 650 .
A downstream end portion 610A is provided on the downstream side of the connecting portion 610 in the traveling direction.
In addition, connecting portion 610 traverses centerline C along the length of tab 500 . Also, the connecting portion 610 passes between the pressed portion RA pressed by the tab 500 (see FIG. 1) of the panel 400 and the rivet 900 (see FIG. 1).

The connecting portion 610 does not reach one end portion 651 of the U-shaped portion 650, and in this embodiment, the first score line 680 is formed between the downstream end portion 610A of the connecting portion 610 and the one end portion 651. There is a non-formation region 92 that is not formed.
In the present embodiment, when the drinking spout (opening) is formed in the can lid 300 (see FIG. 1), first, the operator operates the tab 500, and the operated portion 505 side of the tab 500 is lifted. (operated portion 505 moves away from panel 400).

As a result, the tip portion 510 of the tab 500 is pressed into the enclosed area 91 surrounded by the first score line 680 of the panel 400, and first, the connection portion 610 (see FIG. 2) of the panel 400 is pressed. rupture occurs.
More specifically, the distal end portion 510 of the tab 500 is pressed against the pressed portion RA, and the panel 400 is broken at the connecting portion 610 . More specifically, panel 400 breaks at a portion of connection portion 610 that is located on center line C. As shown in FIG.

The breakage of panel 400 then proceeds along U-shaped portion 650 and finally occurs to one end 651 of U-shaped portion 650 .
Specifically, the breakage of the panel 400 proceeds via the other end 652 and top 653 of the U-shaped portion 650 and finally reaches one end 651 of the U-shaped portion 650 .

Additionally, in the present embodiment, when the panel 400 is broken along the first score line 680, the break progresses in the direction indicated by the arrow 2S in FIG.
In this embodiment, the break reaches one end 651 of the first score line 680 (the end of the first score line 680 located downstream in the direction in which the break advances).

In this embodiment, as the breakage of the panel 400 progresses along the first score line 680 , this breakage finally reaches the one end portion 651 .
In addition, in the present embodiment, one end 651 of the U-shaped portion 650 is positioned downstream in the direction in which the breaking of the panel 400 progresses, and the panel 400 along the first score line 680 is positioned on the downstream side. Fracture occurs up to this one end 651 .
In this embodiment, when the panel 400 is broken up to the one end portion 651, the can lid 300 is in a state where an opening (drinking mouth) is formed.

Next, the second score line 690 (see FIG. 1) will be described.
The second score line 690 is provided at a position away from the center line C along the longitudinal direction of the tab 500 . Also, the second score line 690 is provided at a position away from the position facing the extension line E of the center line C. As shown in FIG.
In the configuration example shown in FIG. 1, the tab 500 is arranged such that the top portion 653 of the first score line 680 is positioned on the extension line E of the center line C along the longitudinal direction of the tab 500 . It's becoming

In FIG. 1, the tab 500 is shown positioned opposite where the spout is to be formed. In other words, FIG. 1 shows tab 500 positioned opposite enclosed area 91 .
In this state, the second score line 690 is provided at a location away from the opposing position of the center line C along the longitudinal direction of the tab 500 . Also, in this state, the second score line 690 is provided at a position away from the facing position of the extension line E of the center line C. As shown in FIG.
Further, in this embodiment, the second score line 690 is positioned behind the tab 500 when the can lid 300 is viewed from the front.

Also, the second score lines 690 are formed outside the surrounded area 91 that is the area surrounded by the first score lines 680 .
"Formed outside the enclosed region 91" includes not only all portions of the second score lines 690 formed outside the enclosed region 91, but also part of the second score lines 690. It also includes a mode in which it is formed outside the recessed region 91 .
In the present embodiment, if at least part of the second score lines 690 are formed outside the enclosed area 91, it can be said that the second score lines 690 are formed outside the enclosed area 91. .

In this embodiment, the lower end portion of the second score line 690 in the figure is included in the enclosed area 91, as indicated by reference numeral 1S in FIG. On the other hand, the portion of the second score line 690 located above the lower end in the figure is located outside the enclosed area 91 .
Here, in the non-formation region 92 where the first score line 680 is not formed, the boundary of the enclosed region 91 is the portion indicated by the dashed line 1X. More specifically, in the non-formation region 92 , the boundary of the enclosed region 91 is the portion where the straight lines connecting the ends of the first score lines 680 are located.
In this embodiment, the lower end of the second score line 690 in the drawing is positioned below the dashed line 1X, and the portion of the second score line 690 positioned above the lower end in the drawing is above the dashed line 1X. located above.

The second score line 690 is formed in a substantially U shape and is formed so as to bulge leftward in the figure. In other words, the second score line 690 has a curvature and is formed to swell in a direction away from the rivet 900 located in the central portion 403 of the panel 400 .
In addition, in the present embodiment, the second score line 690 is bent at both ends of the second score line 690, and the second score line 690 is bent at both ends of the second score line 690 in the radial direction of the panel 400. It goes to the central part 403 side.

In this case, breakage of the panel 400 that occurs in the central portion of the second score line 690 in the longitudinal direction and progresses toward both ends of the second score line 690 tends to stop at the location indicated by reference numeral 1Y. In this case, problems such as breakage of the panel 400 exceeding the second score line 690 are less likely to occur.
In FIG. 1 , the second score line 690 is directed toward the central portion 403 of the panel 400 at both ends of the second score line 690 . Alternatively, the second score line 690 may be directed toward the outer peripheral edge 401 of the panel 400 .

The shape of the second score lines 690 is not particularly limited, and as described above, the second score lines 690 may be curved, or the second score lines 690 may be formed linearly.
Further, for example, the central portion of the second score line 690 in the longitudinal direction may be linear, and both end portions of the second score line 690 may be curved.

FIG. 3 shows the state of the beverage can 100 when the tab 500 is rotated 90 degrees clockwise. FIG. 4 is a diagram showing the beverage can 100 with the tab 500 omitted.
FIG. 4 shows a movement path R1 of tip portion 510 (see FIG. 1) of tab 500 when tab 500 is rotated around rivet 900, which is the center of rotation.
This moving route R1 is circular, and in this embodiment, when the tab 500 is rotated, the distal end portion 510 of the tab 500 moves along this predetermined circular moving route R1.
In this embodiment, the second score line 690 has a curvature and is formed along this annular movement path R1.
In addition, the second score line 690 is not limited to having a shape along the moving route R1 as a whole, and may be partially shaped along the moving route R1. In this embodiment, at least a portion of the second score line 690 is formed along the circular movement route R1.

In this embodiment, by rotating the tab 500 clockwise by 90° around the rivet 900 which is the center of rotation, a second score is formed at a position facing the center line C of the tab 500 as shown in FIG. Line 690 comes to lie.
The second scorelines 690 are formed on the panel 400 and have the function of prompting the breakage of the panel 400 in the same manner as the first scorelines 680 .
The second score line 690 is used to form a pressure relief portion 88 for releasing the pressure inside the beverage can 100 to the outside. More specifically, the second score line 690 is used to form a pressure relief portion 88 for releasing to the outside the pressure inside the beverage can 100 that builds up when the beverage can 100 is shaken.

In this embodiment, the tab 500 is raised in the state shown in FIG.
As a result, the tab 500 presses the portion of the panel 400 indicated by reference numeral 3A in this embodiment.
Specifically, in the present embodiment, the tab 500 presses a portion of the panel 400 that is positioned closer to the rivet 900 than the second score line 690 .

As a result, the panel 400 is broken at the position where the second score line 690 is formed, and the panel 400 is formed with the pressure relief portion 88 that connects the inside and outside of the beverage can 100 .
In this embodiment, the pressure relief portion 88 formed by breaking the panel 400 at the second score line 690 is a slit.
In this embodiment, the pressure inside the beverage can 100 escapes to the outside through the pressure relief portion 88 .
In this embodiment, by rotating the tab 500 in this manner, the breakage of the panel 400 at the second scoreline 690 formed outside the enclosed area 91 is achieved using the tab 500. can do

In the beverage can 100 containing the carbonated beverage, by shaking the beverage can 100 and releasing the pressure inside the beverage can 100 to the outside, the ratio of gas contained in the carbonated beverage can be reduced, and the user can drink the carbonated beverage. You can reduce the irritation you feel.
In this embodiment, as described above, the can lid 300 is formed with the pressure relief portion 88 that connects the inside and outside of the beverage can 100 . As a result, the pressure inside the beverage can 100 can be released to the outside through the pressure relief portion 88 .

In this embodiment, the second scoreline 690 is shorter than the first scoreline 680 . Also, in this embodiment, the second score line 690 is shorter than the width dimension W of the tab 500, as shown in FIG. Here, the width dimension W of the tab 500 refers to the length of the tab 500 in the direction perpendicular to the longitudinal direction of the tab 500 .
Also, in the present embodiment, the lengths of the first score line 680 and the second score line 690 refer to lengths measured along the score lines.

In this embodiment, the drinking mouth formed by breaking the panel 400 at the first score line 680 is a large opening. On the other hand, the area of the pressure relief portion 88 formed by breaking the panel 400 at the second score line 690 is small.
In this embodiment, the pressure relief portion 88 formed by breaking the panel 400 at the second score line 690 is larger than the area of the mouthpiece formed by breaking the panel 400 at the first score line 680. area is smaller.

Further, in the present embodiment, as shown in FIG. 3 , a second score line is provided on the side closer to the central portion 403 of the radial direction central portion 403 of the can lid 300 and the outer peripheral edge 401 of the can lid 300 . 690 is provided.
In other words, when a straight line connecting the central portion 403 and the outer peripheral edge 401 in the radial direction of the can lid 300 is assumed, the second score line 690 is provided on the central portion 403 side of the midpoint of the straight line. there is
In addition, in this embodiment, when the can lid 300 shown in FIG. 1 is viewed from the front, the second score line 690 is provided on the portion of the panel 400 located behind the tab 500 .

In this embodiment, the user first shakes the beverage can 100 when reducing the percentage of gas contained in the carbonated beverage. The user then rotates the tab 500 clockwise 90° and then pulls the tab 500 up.
When the user pulls the tab 500 , a break in the panel 400 occurs at the formation of the second scoreline 690 and a pressure relief 88 is formed in the panel 400 . The pressure in the beverage can 100 escapes to the outside through the pressure relief portion 88 .
Although the case where the tab 500 is rotated clockwise by 90° after shaking the beverage can 100 has been described as an example, depending on the user, the case where the beverage can 100 is shaken after rotating the tab 500 is described as an example. There is also

Thereafter, in the present embodiment, the user rotates the tab 500 counterclockwise 90 degrees to position the tab 500 opposite the enclosed area 91 . In other words, the user restores tab 500 to its original state.
The user then brings up tab 500 . This causes the panel 400 to break at the first score line 680 and forms a drinking hole in the panel 400 . This allows the user to drink the beverage inside the beverage can 100 .

In this embodiment, the case where the initial position of the tab 500 is the opposite position to the spout will be described as an example, but the initial position of the tab 500 is not limited to this, and the tab 500 is rotated clockwise. It may be the position after being rotated by 90°. Referring to the figures, the initial position of tab 500 may be the position shown in FIG.
In this case, the user does not have to rotate the tab 500 clockwise by 90 degrees. In other words, in this case, the user can break the panel 400 at the formation location of the second score line 690 without rotating the tab 500 . In other words, in this case, when breaking the panel 400 at the formation location of the second score line 690 using the tab 500 , this breaking can be performed without rotating the tab 500 .
In this case, the user causes panel 400 to break at the formation location of second score line 690, and then rotates tab 500 counterclockwise. The user then raises tab 500 to form a drinking spout in panel 400 .

In the configuration example shown in FIG. 3, the second score line 690 is formed at a location off the straight line CL. Here, “straight line CL” is an imaginary straight line that connects rivet 900 that is the center of rotation of tab 500 and top portion 653 of first score line 680 .
If the tab 500 is rotated in advance and the initial position of the tab 500 is the position shown in FIG. It is arranged like this.

In this case, as described above, when breaking the panel 400 at the formation location of the second score line 690 using the tab 500 , this breaking can be performed without rotating the tab 500 . In other words, in this case, the drinking spout can be formed in panel 400 without rotating tab 500 .
In order to be able to form the drinking spout in the panel 400 without rotating the tab 500, the tab 500 is rotated in advance. In other words, in order to be able to form a spout in the panel 400 without rotating the tab 500, the can lid 300 should be manufactured with the tab 500 already rotated.
11, 13, etc., if the can lid 300 with the tab 500 pre-rotated is manufactured, the drinking spout can be formed in the panel 400 without rotating the tab 500. become.

Here, as another method for releasing the pressure inside the beverage can 100 to the outside, for example, the second score line 690 is not provided, and the panel 400 is broken at the first score line 680 to form only the mouthpiece. , a method of releasing the pressure through this mouthpiece is also conceivable.
By the way, in this case, the beverage in the beverage can 100 tends to leak outside through the mouthpiece.
When the beverage can 100 is shaken, a burst occurs inside the beverage can 100 and the liquid level of the beverage rises. In this case, forming the mouthpiece as described above makes it easier for the beverage in the beverage can 100 to leak out through the mouthpiece.

In contrast, if the panel 400 is broken at the second score line 690 shorter than the first score line 680 as in the present embodiment, the area of the pressure relief portion 88 will be small. In this case, the beverage is less likely to leak out of the beverage can 100 .
In this embodiment, the second score line 690 is shorter than the width dimension W of the tab 500, and the absolute value of the length of the second score line 690 itself is small. As a result, the pressure relief portion 88 has a small area, and the beverage is less likely to leak out of the beverage can 100 .
Furthermore, in this embodiment, the pressure relief portion 88 is formed in a slit shape. This also prevents the beverage from leaking out of the beverage can 100 .

Here, in the configuration examples shown in FIGS. 1 to 4, the preferable range of the length of the second score line 690 is 2.0 mm to 8.0 mm.
According to experiments conducted by the inventor, if the length of the second score line 690 is less than 2.0 mm, it takes time to reduce the pressure inside the beverage can 100, and the length is longer than 8.0 mm. When it was large, the beverage easily leaked out of the beverage can 100 .
Therefore, as described above, the length of the second score line 690 is preferably 2.0 mm to 8.0 mm.

In addition, in the present embodiment, as described above, the second score line 690 is provided on the side of the central portion 403 in the radial direction of the can lid 300, whereby the pressure on the side of the central portion 403 in the radial direction of the can lid 300 A relief portion 88 is formed.
In this case, compared to the case where the pressure relief portion 88 is formed on the side near the outer peripheral edge 401 of the can lid 300, the beverage inside is less likely to reach the pressure relief portion 88, and the beverage flows out of the beverage can 100. Leakage is even less likely to occur.

Beverage in a foamed state tends to move upward along the inner wall of the beverage can 100, and if the pressure relief portion 88 is provided on the side of the can lid 300 near the central portion 403, the beverage will flow through the pressure relief portion. Hard to reach 88.
More specifically, the beverage is less likely to reach the pressure relief portion 88 than when the pressure relief portion 88 is formed on the side of the can lid 300 near the outer peripheral edge 401 .
In this case, the beverage is less likely to leak out of the beverage can 100 .

In addition, in the configuration examples shown in FIGS. 1 to 4, when breaking the panel 400 at the second score line 690, the load acting on the panel 400 from the tab 500 is less likely to act on the first score line 680. Breakage of the panel 400 at the 1 score line 680 is less likely to occur.
In the configuration examples shown in FIGS. 1 to 4, the second score line 690 is formed outside the enclosed area 91, and when the panel 400 is broken at the second score line 690, the tab 500 is attached to the panel 400. Among them, the part located outside the surrounded area 91 is pressed.
In this case, the load acting on the panel 400 from the tab 500 is less likely to act on the first score line 680, and the panel 400 is less likely to break at the first score line 680 when forming the pressure relief portion 88. Become.

The can lid 300 will be further described with reference to FIG.
In this embodiment, as shown in FIG. 1 , a bead 151 that increases the rigidity of the panel 400 is provided on the panel 400 closer to the outer peripheral edge 401 than the second score line 690 .
The bead 151 is formed by a recess formed in the panel 400 and along the second score line 690 . Note that the bead 151 is not limited to being a concave portion, and may be configured by a convex portion that protrudes toward the surface side of the panel 400 .

In the present embodiment, the bead 151 suppresses deformation of the portion of the panel 400 located closer to the outer peripheral edge 401 than the second score line 690 . In other words, the bead 151 increases the flexural rigidity of the portion of the panel 400 located closer to the outer peripheral edge 401 than the second score line 690 .
This makes it easier for the panel 400 to break at the locations where the second score lines 690 are formed.

The length and shape of the bead 151 are not particularly limited. For example, as shown in FIG. may be shorter than the configuration example shown in .
Moreover, the bead 151 is not limited to a shape having a curvature, and may be formed in a straight shape as shown in FIG. 5(B).

In this embodiment, even in this bead 151 that is formed in a straight line, a portion of this bead 151 is along the second score line 690 .
Specifically, in the configuration example shown in FIG. Along.

Further, the pressed portion of the panel 400 that is pressed by the tab 500 is not limited to the portion described above.
A configuration in which a portion of the panel 400 positioned closer to the outer peripheral edge 401 than the second score line 690 is pressed by the tab 500 may be employed.
Specifically, for example, as shown in FIG. 6 (a diagram showing another configuration example of the beverage can 100), the second score line 690 is arranged on the central portion 403 side of the panel 400 (in FIG. 6 may be arranged on the central portion 403 side compared to the configuration example shown), and the portion indicated by reference numeral 6A in FIG.
That is, the tab 500 may press a portion of the panel 400 that is closer to the outer peripheral edge 401 than the second score line 690 .
In this case, it is preferable to form the bead 151 that increases the rigidity of the panel 400 on the rivet 900 side of the second score line 690 in the panel 400 .

Alternatively, the portion of the panel 400 where the second score lines 690 are formed may be pressed by the tab 500 .
In this case, the portion of the panel 400 located on the rivet 900 side of the second score line 690 and the portion of the panel 400 located on the outer peripheral edge 401 side of the second score line 690 Preferably, at least one of the panels 400 is formed with a bead 151 that enhances the rigidity of the panel 400 .

FIG. 7 is a diagram showing another configuration example of the beverage can 100. As shown in FIG.
FIG. 7 shows the state after the tab 500 has been rotated clockwise by 90 degrees.
In this configuration example, a second score line 690 is formed at a portion of the panel 400 that is not opposed to the tab 500 .
The second score lines 690 are not limited to being formed at positions facing the tabs 500 , and may be formed at a location away from the positions facing the tabs 500 as in this configuration example.

In this configuration example, the second score line 690 is located at a position facing the extension line E of the center line C of the tab 500 .
In this configuration example, similarly to the above, by rotating the tab 500 clockwise about the rivet 900 by 90°, the second score line 690 is positioned opposite the extension line E of the center line C of the tab 500. will come to
In this configuration example, the tab 500 presses a portion of the panel 400 that is positioned closer to the rivet 900 (not shown in FIG. 7) than the second score line 690 as described above.

Also, in this embodiment, the panel 400 is shaped to indicate to the user that the tab 500 needs to be rotated to break the panel 400 at the second score line 690 .
Specifically, in this embodiment, as shown in FIG. 1, two recesses 97 are provided at different positions in the circumferential direction of the can lid 300 .
In the present embodiment, provision of the concave portion 97 facilitates raising the tab 500 . Specifically, in the present embodiment, the user can easily put his or her finger between the operated portion 505 of the tab 500 and the panel 400 as compared with the case where the concave portion 97 is not provided, and the user can raise the tab 500 . easier.

The two recesses 97 are arranged so as to be positioned on the sides of the movement path R2 of the operated portion 505 when the tab 500 is rotated.
In this embodiment, the provision of the two recesses 97 allows the user to recognize that the tab 500 is rotatable. Recognize that it is necessary.
In other words, in this embodiment, the provision of the two recesses 97 allows the user to recognize that the tab 500 is rotatable, and also allows the user to rotate the tab 500 to release the pressure in the beverage can 100. Recognize the need for

Note that this is just an example, and information may be attached to panel 400 that directly informs the user that tab 500 needs to be rotated to break panel 400 at second score line 690 .
Specifically, text information such as "Please turn the tab 90 degrees" may be attached to the panel 400 by engraving or printing.

Further, for example, as shown in FIG. 8 (a diagram showing another configuration example of the beverage can 100), an example of information indicating that the gas content in the beverage is lowered and the beverage is easier to drink is displayed on the surface of the panel 400. You may attach character information, such as "MILD" as. This also allows the user to recognize that the tab 500 needs to be rotated.
In addition, the panel 400 may be provided with both the shape and the information indicating to the user that the tab 500 needs to be rotated.
Also, the shape and information indicating that the tab 500 needs to be rotated are not essential, and the panel 400 may not be provided with this shape or information.

FIG. 9 is a diagram showing another configuration example of the beverage can 100. As shown in FIG.
In the configuration example shown in FIG. 9 , the second score line 690 is formed within the enclosed area 91 .
Further, in this configuration example, as shown in FIG. 9, the second score line 690 is formed at a position facing the center line C of the tab 500 arranged facing the enclosed region 91 .
In this configuration example, the tab 500 is arranged such that the top portion 653 of the first score line 680 is positioned on the extension line E of the center line C along the longitudinal direction of the tab 500 . In this configuration example, a second score line 690 is formed at a position facing the center line C of the tabs 500 arranged in this way.
In this configuration example, similarly to the above, the tab 500 presses the portion of the panel 400 located closer to the rivet 900 than the second score line 690 .
Also in this configuration example, similarly to the above, the bead 730 that increases the rigidity of the panel 400 is provided on the outer peripheral edge 401 side of the second score line 690 in the panel 400 .

In this configuration example shown in FIG. 9, the user shakes the beverage can 100 in the same manner as described above when desiring to reduce the gas contained in the beverage.
The user then raises the tab 500 at a second angle that is less than the first angle, which is the angle of the tab 500 as the spout is formed. “Angle” here refers to the angle of tab 500 relative to panel 400 .

As a result, the panel 400 is broken at the location where the second score line 690 is formed, and the pressure relief portion 88 is formed in the panel 400 in the same manner as described above.
Then, in this example configuration, the user also brings up tab 500 . As a result, the panel 400 is broken at the position where the first score line 680 is formed, and a drinking hole is formed in the panel 400 .
In the configuration example shown in FIG. 9 , the user can release the pressure inside the beverage can 100 to the outside without rotating the tab 500 .

As in the above, the portion of the panel 400 that is pressed by the tab 500 is not particularly limited, and the portion of the panel 400 that is located closer to the outer peripheral edge 401 than the second score line 690 is pressed by the tab 500. It may be configured to be
In this case, it is preferable to form a bead that enhances the rigidity of the panel 400 on the rivet 900 side of the second score line 690 in the panel 400 .

Further, as in the above case, the portion of the panel 400 where the second score lines 690 are formed may be pressed by the tab 500 .
In this case, at least one of a portion of the panel 400 located on the rivet 900 side of the second score line 690 and a portion of the panel 400 located on the outer peripheral edge 401 side of the second score line 690, It is preferable to form beads that increase the stiffness of panel 400 .

Further, for example, as shown in FIG. 10 (a diagram showing another configuration example of the beverage can 100), a second score line 690 may be formed on a portion of the panel 400 that does not face the tab 500. .
In the configuration example shown in FIG. 10 , the second score line 690 is located at a position facing the extension line E extending from the center line C of the tab 500 .

In addition, in the configuration examples shown in FIGS. 9 and 10, the preferable range of the length of the second score line 690 is 2.0 mm to 8.0 mm.
According to experiments conducted by the inventor, if the length of the second score line 690 is less than 2.0 mm, it takes time to reduce the pressure inside the beverage can 100, and the length is longer than 8.0 mm. When it was large, the beverage easily leaked out of the beverage can 100 .
Therefore, in the configuration examples shown in FIGS. 9 and 10, the length of the second score line 690 is preferably 2.0 mm to 8.0 mm.

FIG. 11 is a diagram showing another configuration example of the beverage can 100. As shown in FIG.
In this configuration example, the second score lines 690 are formed outside the surrounded area 91 that is the area surrounded by the first score lines 680 .
Also, in this configuration example, the second score line 690 is provided near the rivet 900 that is the center of rotation of the tab 500 .
Also, in this configuration example, the second score line 690 is provided at a position facing the tongue-shaped elastic piece 507 .

Further, in this configuration example, the second score line 690 is provided at a location away from the opposing position of the center line C along the longitudinal direction of the tab 500 . Also, the second score line 690 is provided at a position away from the position facing the extension line E of the center line C. As shown in FIG.
Moreover, the second score line 690 is directed toward the outer peripheral edge 401 of the can lid 300 at both ends thereof. As in the above, the second score line 690 may be directed toward the central portion 403 of the can lid 300 at both ends of the second score line 690 .

In this configuration example as well, by rotating the tab 500 clockwise by 90°, the center of the tab 500 can be adjusted as shown in FIG. A second score line 690 is located at a position opposite to the line C. As shown in FIG.
In this configuration example, similarly to the above, by rotating the tab 500, the panel 400 is broken at the second score line 690 formed outside the enclosed area 91, and the tab 500 is used to break the panel 400. This rupture can be performed.

In this configuration example, as shown in FIG. 12 , the tab 500 is lifted with the second score line 690 positioned opposite the center line C of the tab 500 .
In this case, the tab 500 lifts the portion of the panel 400 provided with the rivet 900 . On the other hand, the contact portion of panel 400 with which tip 510 of tab 500 contacts is pushed down. As a result, a shearing force acts on the portion of the panel 400 where the second score lines 690 are formed.
As a result, the panel 400 is broken at the location where the second score line 690 is formed, and the pressure relief portion 88 is formed in the panel 400 in the same manner as described above. As a result, the pressure inside the beverage can 100 escapes to the outside.

FIG. 13 is a diagram showing another configuration example of the beverage can 100. As shown in FIG.
FIG. 13 shows the state after the tab 500 has been rotated.
In this configuration example shown in FIG. 13, the second score line 690 is longer than the configuration examples shown in FIGS. As a result, in this case, the amount of gas released to the outside of the beverage can 100 through the pressure relief portion 88 (amount per unit time) can be increased.
In this configuration example shown in FIG. 13, compared with the configuration examples shown in FIGS. Compared to the illustrated configuration example, the second score line 690 as a whole is shifted upward.

In the configuration examples shown in FIGS. 11 and 12, if the length of the second score line 690 is increased, the second score line 690 and the first score line 680 intersect.
Therefore, in this configuration example shown in FIG. 13, by shifting the position of the second score line 690 upward in the drawing, the length of the second score line 690 is increased, and the second score line 690 and the first score are separated from each other. Avoid crossing line 680 .
In this configuration example, it is necessary to rotate the tab 500 by more than 90°, but in this configuration example as well, the pressure relief portion 88 can be formed in the same manner as described above, and the pressure inside the beverage can 100 can be released to the outside. .

Here, in the configuration examples shown in FIGS. 11 to 13, the preferable range of the length of the second score line 690 is 2.0 mm to 8.0 mm.
According to experiments conducted by the inventor, if the length of the second score line 690 is less than 2.0 mm, it takes time to reduce the pressure inside the beverage can 100, and the length is longer than 8.0 mm. When it was large, the beverage easily leaked out of the beverage can 100 .
Therefore, as described above, the length of the second score line 690 is preferably 2.0 mm to 8.0 mm.

14A and 14B are diagrams showing cross-sectional shapes of the first score line 680 and the second score line 690. FIG.
In the configuration examples shown in FIGS. 1 to 13 , the depth of the second scorelines 690 is greater than the depth of the first scorelines 680 .
Accordingly, in this embodiment, the thickness T1 of the panel 400 at the portion where the second score lines 690 are formed is smaller than the thickness T2 of the panel 400 at the portion where the first score lines 680 are formed.

If the depth of the second scoreline 690 is greater than the depth of the first scoreline 680, the breakage of the panel 400 at the formation location of the second scoreline 690 is greater than that at the formation location of the first scoreline 680. This is more likely than the breakage of the panel 400 .
Here, if the tab 500 is used to form the pressure relief portion 88 in addition to forming the mouthpiece as in the present embodiment, the load on the tab 500 is increased. In this case, the tab 500 may be deformed or damaged during the formation of the drinking spout, which is performed after the formation of the pressure relief portion 88 .

On the other hand, if the depth of the second score line 690 is greater than the depth of the first score line 680 as in this embodiment, the depth of the second score line 690 is greater than the depth of the first score line 680. The load on the tab 500 is smaller than when the depth is the same as or smaller than the depth of the tab 500 .
In this case, the tab 500 is less likely to be deformed or damaged when the drinking spout is formed after the pressure relief portion 88 is formed.

(others)
In the above description, the rotation angle of the tab 500 (the rotation angle in the circumferential direction of the can lid 300) when the panel 400 is broken at the second score line 690 is all less than 180°. By the way, not limited to this, the second score line 690 may be formed on the opposite side of the enclosed region 91 with the rivet 900 interposed therebetween. In this case, the rotation angle of the tab 500 is 180°.
However, as described above, the rotation angle of tab 500 is preferably less than 180°. More preferably, the rotation angle of tab 500 is 90° or less. In this case, the amount of rotation of the tab 500 is small, and the operability for the user is improved.
Here, the rotation angle of the tab 500 refers to the rotation angle of the tab 500 with reference to the position of the tab 500 when forming the spout.
More specifically, the rotation angle of the tab 500 is such that the apex 653 of the first score line 680 is positioned on the extension line E of the center line C (see FIG. 1) along the longitudinal direction of the tab 500. , indicates the rotation angle of the tab 500 when the state in which the tab 500 is arranged is taken as a reference state.

88 Pressure relief portion 91 Enclosed region 100 Beverage can 200 Can body 151 Bead 300 Can lid 400 Panel 401 Peripheral edge 500 Tab 510 Tip 680 ... first score line, 690 ... second score line, 900 ... rivet, C ... center line, E ... extension line, R1 ... movement path

Claims (18)

A can lid that can be used for a beverage can containing a carbonated beverage,
a substrate;
a first score line formed on the base material to promote breakage of the base material, the first score line being used to form a mouthpiece;
A second score line that is formed on the base material and promotes breakage of the base material, and is used to form a pressure relief portion for releasing to the outside the pressure inside the beverage can that increases when the beverage can is shaken. a second scoreline that is
A can lid with a 2. The can lid of claim 1, wherein said second score line is shorter than said first score line. Further comprising a tab used to form the mouthpiece,
the tab causes breakage of the substrate at the second score line;
2. The can lid according to claim 1, wherein said second score line is shorter than the width dimension of said tab. Further comprising a tab used to form the mouthpiece,
The tab is provided rotatably around a predetermined center of rotation,
When the tab is rotated around the center of rotation, the tip of the tab moves along a predetermined annular path,
2. The can lid according to claim 1, wherein said second score line is at least partially formed along said annular path. The substrate has an outer peripheral edge,
The tab presses a portion of the base material positioned closer to the center of rotation than the second score line,
The can lid according to claim 4, wherein a bead that enhances the rigidity of the base material is provided on the outer peripheral edge side of the base material with respect to the second score line. The substrate has an outer peripheral edge,
The tab presses a portion of the base material located closer to the outer peripheral edge than the second score line,
The can lid according to claim 4, wherein a bead that enhances the rigidity of the base material is formed on the base material closer to the center of rotation than the second score line. 2. The can lid according to claim 1, wherein said second score line is formed within an enclosed area of said substrate surrounded by said first score line. Further comprising a tab used to form the mouthpiece,
The second score line is provided at a position deviating from a position opposed to a center line along the longitudinal direction of the tab arranged to face the part where the drinking spout is formed, and 2. The can lid according to claim 1, wherein the can lid is provided at a location away from the opposed position of the extension of the line. The tab is provided rotatably around a predetermined center of rotation,
9. The can lid of claim 8, wherein rotating the tab about the center of rotation causes the second score line to be positioned opposite the center line or the extension line. 2. The can lid according to claim 1, wherein said second score line is formed outside an enclosed area which is an area enclosed by said first score line. Further comprising a tab used to form the mouthpiece,
The tab is provided rotatably around a predetermined center of rotation,
10. By rotating the tab, the breaking of the base material at the second score line formed outside the enclosed area can be performed using the tab. The can lid described in . 12. The can lid according to claim 11, wherein said second score line is provided near said center of rotation. 2. The can lid of claim 1, wherein the depth of said second score line is greater than the depth of said first score line. The pressure relief portion formed by breaking the base material at the second score line is larger than the area of the mouthpiece formed by breaking the base material at the first score line. The can lid according to claim 1, wherein the area of is smaller. 15. The can lid according to claim 14, wherein the pressure relief portion formed by breaking the base material at the second score line is a slit. Further comprising a tab used to form the mouthpiece,
The tab is provided rotatably around a predetermined center of rotation,
By rotating the tab as the center of rotation, the breakage of the base material on the second score line can be performed by using the tab,
Can lid according to claim 1, wherein the substrate is provided with a shape and/or information indicating that the tub is rotatable. Further comprising a tab used to form the mouthpiece,
The tab is provided rotatably around a predetermined center of rotation,
The first score line has a portion that bulges from the central portion side of the base material toward the outer peripheral edge side of the base material,
The second score line is formed at a location off a straight line connecting the top of the bulging portion and the center of rotation,
The tab is arranged so that the tip of the tab is located at a position deviated from the position facing the straight line,
2. The can lid according to claim 1, wherein when the tab is used to break the base material at the locations where the second score lines are formed, the breakage can be performed without rotating the tab. A beverage can comprising a can body containing a carbonated beverage and a can lid closing an opening of the can body, wherein the can lid is the can lid according to any one of claims 1 to 17.