WO2016021434A1 - Can lid and beverage can - Google Patents

Abstract

As illustrated in (A), a tab (500) has a tab tongue portion (550) disposed on the inside of a U-shaped pierced portion (560). The right end portion of the tab tongue portion (550) in the figure (the base part of the tab tongue portion (550)) is connected to the tab main portion (520). Furthermore, the tab tongue portion (550) is formed so as to extend to the left in the figure when the point where the portion connects to the tab main portion (520) is defined as the start point. Furthermore, as illustrated in (D), a groove (580) is formed on the back face (500B) side of the tab (500) at the base part of the tab tongue portion (550).

Description

Can lid and beverage can

The present invention relates to a can lid and a beverage can.

An easy opening slit is formed on the tab panel surface between the center position of the rivet hole and the rear edge of the finger hook hole so that the rear portion of the tab can be easily bent up to a predetermined angle and not bent beyond the predetermined angle. A can lid has been proposed (see, for example, Patent Document 1).

JP 2002-211151 A

Here, when the tab attached to the can lid is operated to form the opening in the can lid, if the rigidity of the tab is large, a load is easily transmitted from the tab to the can lid, and the opening is easily formed. On the other hand, when the rigidity of the tab is large, it is difficult for an operator's finger to enter between the tab and the panel when the tab is raised from the panel, and the operability of the tab is lowered.
The objective of this invention is improving the operativity at the time of an operator operating a tab, ensuring the rigidity of a tab.

A can lid to which the present invention is applied is formed along a panel, a score line formed on the panel, and one direction, and has one end and another end. A tab for pressing an area located inside the score line, a rivet for fixing a portion located between the one end and the other end of the tab to the panel, and the tab more than the rivet Is located on the one end portion side, and connects the rivet and the one end portion, and is provided on the connection portion having a panel facing portion on the side facing the panel, and on the panel facing portion of the connecting portion, It is a can lid | cover provided with the groove | channel formed so that it might advance in the direction which cross | intersects the said one direction which is the direction where the said tab extends.
Here, the connecting portion is provided with a protruding portion that protrudes toward the panel side, and the groove is formed in the protruding portion. In this case, a groove can be formed in the connection portion even if the thickness of the connection portion is small.
The width of the end portion in the longitudinal direction of the groove may be larger than the width of the central portion in the longitudinal direction of the groove. In this case, it is possible to suppress variation in the abutting position when the portions of the protruding portion that face each other across the groove abut each other.
In addition, the protruding portion in which the groove is formed is a base material that constitutes the tab and presses a mold against a portion of the base material in which the slit is formed in advance. It can be characterized by having been formed. In this case, compared with the case where the groove is formed in the protrusion after the protrusion is formed, the process for forming the protrusion with the groove can be simplified.
Moreover, the recessed part into which the said protrusion part enters may be formed in the part facing the said protrusion part of the said panels. In this case, the connection portion can be brought close to the panel.
Moreover, the part connected to the said rivet among the said connection parts may protrude toward the said panel side. In this case, the portion of the connecting portion that is connected to the rivet can be brought close to the panel.
From another point of view, a can lid to which the present invention is applied is formed on a panel having a first surface and a second surface opposite to the first surface, and the panel. The score line is disposed on the first surface side of the panel and is formed along one direction, and has one end and the other end, and the one end of the score line of the panel A tab that presses a region located on the inside; a rivet that fixes a portion located between the one end and the other end of the tab to the panel; and the one end of the tab relative to the rivet The rivet and the one end are connected to each other, a panel facing portion is provided on the side facing the panel, the panel breaks at the score line, and the one end of the tab is the second portion. A connection portion that bends as it moves toward the surface of the Provided the panel-facing portion, the position in the one direction are arranged differently from each other, is a can lid comprising a contact portion, a in contact with each other with the bending of the connection portion.
Further, the contact portion may be constituted by a protruding portion protruding from the panel facing portion of the connection portion. In this case, even if the panel facing portion of the connecting portion is a flat surface, the contact portion can be provided on the panel facing portion.
The protrusion may have a shape in which a top portion of the protrusion is removed. In this case, the amount of floating of the tab from the panel can be reduced as compared with a case where the top portion of the protruding portion is not removed.
Further, in the region located inside the score line of the panel, the second region is connected to the score line and is formed so as to go from the connecting portion with the score line to the region. The score line is formed. In this case, the operation load when the operator operates the tab can be reduced.
Moreover, when the present invention is regarded as a beverage can, the beverage can to which the present invention is applied is a beverage can comprising a can body containing a beverage and a can lid attached to the can body, The can lid is a beverage can which is the can lid according to any one of the above.

According to the present invention, it is possible to improve the operability when the operator operates the tab while securing the rigidity of the tab.

It is a top view of the beverage can to which this embodiment is applied. (A)-(D) are the figures explaining a tab. (A), (B) is a figure explaining the can lid | cover before a tab is attached. It is the figure which showed the state of the drink can when the tab was operated. It is the figure which showed the base part of a tab tongue piece part. It is a figure explaining a groove | channel. It is the figure which showed the other structural example vicinity of a tab tongue piece part. It is the figure which showed the base part of a tab tongue piece part when a tab is operated. It is the figure which showed the other structural example vicinity of a tab tongue piece part. It is the figure which showed the other structural example vicinity of a tab tongue piece part. It is the figure which showed the other structural example. It is the figure which showed the other structural example vicinity of a tab tongue piece part. It is the figure which showed the state of the base part of a tab tongue piece part when a tab is operated. It is the figure which showed the other structural example vicinity of a tab tongue piece part. It is the figure which showed the state of the base part of a tab tongue piece part when a tab is operated. It is the figure which showed the other structural example vicinity of a tab tongue piece part. It is the figure which showed the other structural example vicinity of a tab tongue piece part. It is the figure which showed the other structural example vicinity of a tab tongue piece part. It is the figure which showed the other structural example vicinity of a tab tongue piece part. It is a figure at the time of seeing the protrusion part shown in FIG. 19 from the back surface side of a tab. (A) to (D) are views showing a method of forming the protrusion shown in FIGS. (A)-(F) are the figures which showed the other example of the slit. (A), (B) is sectional drawing of the tab in the XXIII-XXIII line of FIG. It is the figure which showed the modification of the 1st contact part and the 2nd contact part.

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings.
FIG. 1 is a top view of a beverage can 100 to which the present embodiment is applied.
As shown in the figure, the beverage can 100 has a container body (can body) 200 having an opening at the top and a bottom at the bottom and formed in a cylindrical shape, and is attached to the opening of the container body 200. And a can lid 300 for closing the opening. The beverage can 100 contains beverages such as soft drinks, carbonated drinks, and alcoholic drinks.

The can lid 300 has a disk-shaped panel 400 that functions as a substrate and is attached to the container body 200. A tab 500 that is operated by an operator is attached to the front surface (first surface) of the panel 400. When the tab 500 is operated (lifted) by one end (left end in the drawing) by the operator, the tab 500 is in contrast to a predetermined portion (details will be described later) of the panel 400. The end portion (tip portion) is pressed and the panel 400 is pressed.
In the present specification, the left end portion of the tab 500 in the drawing is referred to as an operated portion 505, and the right end portion of the tab 500 in the drawing is referred to as a tip portion 510.

The tab 500 is fixed to the panel 400 by a rivet 900 provided at a position shifted from the center of the panel 400. In other words, the tab 500 is fixed to the panel 400 by a rivet 900 provided in an eccentric state with respect to the panel 400. Further, the tab 500 is fixed to the panel 400 by a rivet 900 at a portion located between the operated portion 505 and the tip portion 510.

The tab 500 may be fixed to the panel 400 with a rivet 900 provided at the center of the panel 400.
Further, in the present embodiment, the tab 500 in which the tip portion 510 is formed in an arc shape is illustrated, but the tab 500 can also be formed in a rectangular shape. In this case, the tip portion 510 of the tab 500 is linear. It becomes.

The tab 500 will be described with reference to FIGS. 2A to 2D (a diagram illustrating the tab 500).
2A is a front view of the tab 500, and FIG. 2B is a cross-sectional view taken along the line IIB-IIB in FIG. 2A. FIG. 6C is a view when the tab 500 is viewed from the direction of arrow IIC in FIG. FIG. 4D is a rear view of the tab 500. If it adds, the figure (D) is a figure at the time of seeing the tab 500 from the opposing surface side which opposes the panel 400 (refer FIG. 1).

The tab 500 has a tab body 520 formed in a plate shape and in a substantially rectangular shape as shown in FIG. Further, the tab 500 has a front surface 500A and a back surface 500B as shown in FIGS.

In this embodiment, as shown in FIGS. 4B and 4D, the outer peripheral edge of the tab main body 520 is bent (curled), and the outer peripheral edge of the tab main body 520 is on the inner side. It is in a curled state. In other words, a curl portion is formed at an edge portion provided on each side of the tab main body portion 520. Thereby, in this embodiment, the bending rigidity of the tab 500 is improved.

Further, as shown in FIG. 5A, the tab 500 is formed with a through hole (finger hole) 530 on which the operator's finger is hooked on the operated portion 505 side.
The tab 500 is provided with a penetrating portion (tampier) 560 that is formed in a U shape and penetrates the tab main body portion 520. Here, the through portion 560 formed in a U shape has one end 560A and the other end 560B, and is formed so as to swell toward the operated portion 505 side of the tab 500.

Further, the tab 500 is provided with a tab tongue piece 550 inside the U-shaped through portion 560 as shown in FIG. The tab tongue piece 550 is connected to the tab body 520 at the right end in the figure (the root portion of the tab tongue piece 550). Furthermore, the tab tongue piece 550 is formed so as to extend in the left direction in the drawing when a portion connected to the tab main body 520 is a starting point.

Furthermore, in this embodiment, as shown in FIG. 5A, the tab tongue piece 550 is formed with an insertion hole 540 into which a protruding portion 420 (described later) provided on the panel 400 is inserted.
Further, in the present embodiment, as shown in FIG. 4D, at the base portion of the tab tongue piece portion 550 (at the connection portion between the tab tongue piece portion 550 and the tab main body portion 520), and the tab 500 A groove 580 is formed on the back surface 500B side. The groove 580 is formed so as to proceed in a direction (crossing direction) orthogonal to one direction (longitudinal direction) (left-right direction in the drawing) in which the tab extends.

In addition, in this embodiment, a groove 580 is formed in the connection portion 2F shown in FIG. In the present embodiment, the rivet 900 (see FIG. 1) and the tip portion 510 of the tab 500 are connected by the connecting portion 2F, but in the present embodiment, the connecting portion 2F has a groove. 580 is formed. More specifically, the groove 580 is formed on the panel facing surface side facing the panel 400 (FIG. 1) in the connecting portion 2F.

3A and 3B are diagrams illustrating the can lid 300 before the tab 500 is attached. 2A is a front view, and FIG. 2B is a cross-sectional view taken along line IIIB-IIIB in FIG. 2A.

As shown in FIG. 3A, the can lid 300 of the present embodiment includes a panel 400 formed in a disk shape. The panel 400 has an outer peripheral edge 410 that is bent. In this embodiment, the outer peripheral edge 410 and the upper edge (not shown) of the container body 200 (see FIG. 1) are in contact with each other, so that a so-called winding process is performed on the outer peripheral edge 410 and the upper edge. Applied. Thereby, the can lid 300 is fixed to the upper edge part of the container main body 200.

Further, the can lid 300 is formed with a protruding portion (nipple) 420 which is crushed when the tab 500 is fixed to the panel 400 and becomes the rivet 900 (see FIG. 1) described above.
A first score line 430 is formed on the surface of the panel 400.

The first score line 430 is constituted by a groove formed on the surface of the panel 400, and plays a role of inducing breakage (described later) of the panel 400. In addition, the first score line 430 can be regarded as a planned fracture line where the panel 400 is scheduled to be broken. More specifically, the first score line 430 has a role of prompting the breakage of the panel 400 so that the breakage of the panel 400 that occurs when the tab 500 presses the panel 400 occurs at a predetermined location of the panel 400.

Here, the first score line 430 is provided with a U-shaped portion 430A formed in a U-shape and a linear portion 430B connected to the U-shaped portion 430A.
The U-shaped portion 430A is formed so as to swell from the central portion CP side of the panel 400 toward the outer peripheral edge 410 side of the panel 400, and the shape when the panel 400 is viewed from the front is U-shaped. Furthermore, the U-shaped portion 430 </ b> A has one end 431 and the other end 432 on the center CP side of the panel 400, and a top 433 </ b> A on the outer peripheral edge 410 side of the panel 400.

The straight line portion 430B is connected to one end portion 431 of the U-shaped portion 430A, and is formed so as to extend toward the other end portion 432 of the U-shaped portion 430A, starting from the connection portion with the one end portion 431. Yes. In other words, the straight line portion 430B is formed so as to start from the connection portion with the one end portion 431 toward the other end portion 432 of the U-shaped portion 430A. Furthermore, the straight line portion 430B has a lower end portion 491 located on the lower side in the drawing and connected to the one end portion 431, and an upper end portion 492 located on the upper side in the drawing and disposed near the other end portion 432.

In the present embodiment, the other end portion 432 of the U-shaped portion 430A and the upper end portion 492 of the linear portion 430B are curled, and the breakage of the panel 400 beyond the other end portion 432 and the upper end portion 492 Excessive breakage of the panel 400 is suppressed. When the curl is not curled and formed in a straight line, the panel 400 is torn at a location exceeding the other end 432 and a location exceeding the upper end 492, and the panel 400 is broken. May occur.

One end 431 of the U-shaped portion 430A is one of two regions opposed to each other with a center line CL of the tab 500 (center line along the longitudinal direction of the tab 500) (see also FIG. 2D). It is arrange | positioned at the area | region (lower area | region in a figure) side. On the other hand, the other end 432 is arranged on the other region (upper region in the drawing) side of the two regions facing each other with the center line CL interposed therebetween. In the present embodiment, the U-shaped portion 430A is formed so as to be line symmetric with respect to the center line CL of the tab 500.

Furthermore, in the present embodiment, the upper end 492 of the linear portion 430B and the other end 432 of the U-shaped portion 430A are provided in a state of being separated from each other, whereby the upper end 492 and the other end 432 are provided. The discontinuous part 480 in which the 1st score line 430 is not formed is provided in between. By providing the discontinuous portion 480, a panel tongue piece portion 440 described later does not detach from the panel 400, and the panel tongue piece portion 440 remains attached to the panel 400. In the present embodiment, the center line CL of the tab 500 passes through the center portion CP of the panel 400 and the protruding portion 420 formed on the panel 400 as shown in FIG.

In the present embodiment, a virtual line orthogonal to the center line CL and passing through the protrusion 420 (rivet 900) (hereinafter, this virtual line is referred to as “rivet line RL”) is assumed. The one end 431 and the other end 432 are located closer to the center CP of the panel 400 than the rivet line RL.
In the present embodiment, as shown in FIG. 3A, the virtual line KL orthogonal to the center line CL and out of two regions facing each other across the virtual line KL passing through the center portion CP of the panel 400 The top portion 433A is located in one of the regions, and the one end portion 431 and the other end portion 432 are located in the other region.

Furthermore, the protrusion 420 which becomes the rivet 900 is provided in a portion surrounded by the first score line 430 in the panel 400. Further, the U-shaped portion 430A is provided with a curved portion 433 as shown in FIG. The curved portion 433 swells toward the outer peripheral edge 410 side of the panel 400 and passes through the outer peripheral edge 410 side of the panel 400 rather than the protruding portion 420.

In the present embodiment, when the tab 500 is operated by the operator, the area surrounded by the first score line 430 is pressed by the tab 500, and the panel 400 is placed at a place where the first score line 430 is formed. Fracture (details will be described later). Thereby, the area | region in which the 1st score line 430 is formed becomes a tongue piece shape, and this area | region bends toward the inside of the drink can 100. FIG. Thereby, the opening which plays the role as a drinking mouth is formed in the drink can 100.
In the present specification, hereinafter, the tongue-like portion formed by breakage occurring at the first score line 430 may be referred to as a panel tongue piece 440.

Furthermore, in the present embodiment, as shown in FIG. 3A, the second score line 450 is formed on the surface of the panel 400. The second score line 450 is also formed by a groove formed on the surface of the panel 400 and plays a role of inducing breakage of the panel 400. The second score line 450 is provided in a region where the top portion 433A is provided, out of two regions facing each other across the rivet line RL.

The second score line 450 has one end 451 and the other end 452. Here, the other end 452 of the second score line 450 is connected to a bending portion 433 provided on the first score line 430. For this reason, in this embodiment, a score line branches in the location where the 1st score line 430 and the 2nd score line 450 connect.

The other end 452 of the second score line 450 is connected to a portion located between the center line CL and the rivet line RL in the curved portion 433 of the first score line 430. More specifically, the other end 452 of the second score line 450 is connected to a portion of the first score line 430 located between the top 433A and the other end 432.

Further, in the present embodiment, the second score line 450 is provided so as to go from the connection portion with the first score line 430 toward the area surrounded by the first score line 430.
In the present embodiment, a connecting portion between the first score line 430 and the second score line 450 is provided on the side where the top portion 433A is provided with respect to the rivet line RL arranged in a relationship orthogonal to the center line CL. It has been.

Further, in the present embodiment, a connecting portion between the first score line 430 and the second score line 450 is provided on the side where the region RA is located with respect to the rivet line RL. In addition, in this embodiment, the portion of the region RA is pressed by the tip portion 510 of the tab 500, but in this embodiment, the second score line is between the region RA to be pressed and the rivet line RL. 450 is provided.

In the present embodiment, the case where the second score line 450 is formed so as to be directed from the center portion CP side of the panel 400 toward the upper right direction in the figure has been described. You may form so that it may go to a direction. In this case, the second score line 450 is connected to a portion located between the top portion 433A and the one end portion 431 of the U-shaped portion 430A.

Furthermore, one end 451 of the second score line 450 is provided in the vicinity of the protruding portion 420. In addition, one end 451 of the second score line 450 is disposed on one of the two regions facing each other across the center line CL, and the other end 452 of the second score line 450 It arrange | positions at the other area | region side of the area | regions.
Furthermore, the second score line 450 has a straight line portion 453 that extends from the other end portion 452 toward the protruding portion 420. Moreover, it has the curved part 454 which was connected to the linear part 453, and was arrange | positioned with a distance between the protrusion parts 420 formed in the column shape, and was formed so that the outer periphery of the protrusion part 420 might be followed.

The curved portion 454 of the second score line 450 is formed between the top portion 433A and the protruding portion 420. The curved portion 454 is provided so as to pass between the region RA pressed by the tab 500 of the panel 400 and the protruding portion 420. In addition, in the present embodiment, the second score line 450 is provided so as to pass through the side where the protruding portion 420 (rivet 900) is provided with respect to the region RA. It passes between RA and the protrusion 420.

Further, the curved portion 454 of the second score line 450 is provided so as to intersect the center line CL. More specifically, the second score line 450 in the present embodiment passes between the region RA and the protrusion 420 and then travels along the direction intersecting the center line CL. Connected to 430A.

More specifically, the second score line 450 that proceeds along the direction intersecting the center line CL and toward the U-shaped portion 430A passes through the side of the region RA. The second score line 450 passes between the region RA and the protruding portion 420, and then gradually moves away from the rivet line RL, and is connected to the U-shaped portion 430A.

Here, in the configuration of the present embodiment, when the tab 500 is operated by the user and the portion of the region RA is pressed by the tip portion 510 of the tab 500, the region RA and the rivet 900 in the second score line 450 are displayed. The panel 400 is broken at a portion located between the (protruding portion 420).
Thereafter, the panel 400 is broken along the second score line 450, and the panel 400 is broken to the connection portion between the first score line 430 and the second score line 450. Thereafter, the panel 400 is broken from the connecting portion toward the other end 432 of the first score line 430 and the panel 400 is broken toward the upper end 492 of the first score line 430.

FIG. 4 is a diagram showing a state of the beverage can 100 when the tab 500 is operated. In FIG. 4, a top view of the beverage can 100 is shown in the upper part of the drawing, and a cross-sectional view of the central portion of the can lid 300 is shown in the middle and lower part of the drawing.

FIG. 4A shows a state of the beverage can 100 before the tab 500 is caused.
FIG. 4B shows the state of the beverage can 100 immediately after the tab 500 starts to be raised. In this state, the panel 400 is broken at the second score line 450, and the panel 400 is broken at a part of the first score line 430. Specifically, the panel 400 is broken up to the rivet line RL.

Here, in the state shown in FIG. 5B, the tab 500 is bent in the vicinity of the base of the tab tongue piece 550 as shown in FIGS. In addition, in the state shown in FIGS. (B1) and (B2), the tip portion 510 of the tab 500 enters the inside of the beverage can 100, while the portion of the rivet 900 does not enter the inside. Accordingly, the tab 500 is bent near the base of the tab tongue piece 550.

FIG. 5C shows a state after the tab 500 is further raised. In this state, the panel 400 is further broken at the first score line 430, and the panel tongue piece 440 is formed. Further, in this state, bending of panel 400 is started at discontinuous portion 480 (see FIG. 3A).
FIG. 4D shows a state where the tab 500 is further raised. At this stage, the panel 400 is further bent, and the panel tongue piece 440 is pushed further into the beverage can 100.

Here, at the stage of FIG. 4B, as described above, the tip portion 510 of the tab 500 enters the inside of the beverage can 100, while the portion of the rivet 900 does not enter the inside. In such a case, the tab 500 is bent (tilted) at the base portion of the tab tongue piece 550.
By the way, when the rigidity of the base portion of the tab tongue piece portion 550 is small and the tab 500 is easily bent, the tab 500 is formed at the root portion of the tab tongue piece portion 550 as shown in FIG. It bends greatly.

In this case, the panel tongue piece 440 does not enter the beverage can 100 as shown in FIGS. 4 (C) and 4 (D), and the formed opening is smaller than the originally planned opening. There is a risk of becoming. If it adds, the force from the operator given to the to-be-operated part 505 of the tab 500 will not act as a force which tries to enter the panel tongue piece part 440 into the inside of the beverage can 100, and the panel tongue piece part 440 will be used. Acts as a force to bend partially.
In order to suppress the occurrence of such a problem, it is necessary to increase the bending rigidity of the base portion of the tab tongue piece 550.

On the other hand, when the bending rigidity of the base portion of the tab tongue piece 550 is large, the deformation of the tab 500 is less likely to occur than when the bending rigidity is small, and the operability when the operator moves the tab 500 is improved. It tends to decline. In other words, when the operator moves the tab 500, the operator needs to put his finger between the tab 500 and the panel 400. At this time, it becomes difficult for the operator to put the finger.

Moreover, when the bending rigidity of the base part of the tab tongue piece part 550 is large, the opening property is also deteriorated as compared with the case where the bending rigidity is small.
Here, when causing the panel 400 to break along the score line, it is necessary to apply a force to the operated portion 505 of the tab 500. However, if the bending rigidity is large as described above, the operated portion In 505, not only a force for breaking the panel 400 but also a force for bending the tab tongue piece 550 is required. In such a case, the openability is deteriorated.

For this reason, in this embodiment, as shown in FIG. 2D, by forming the groove 580 in the base portion of the tab tongue piece 550, the rigidity of the tab 500 is ensured, and the operator To improve the operability of the system. Specifically, in the initial operation of the tab 500, the bending rigidity of the base portion of the tab tongue piece 550 is made small, and when the tab 500 is operated to some extent, the bending of the base portion of the tab tongue piece 550 is performed. The rigidity is increased.

In addition, in the present embodiment, when the break in the panel 400 passes the rivet line RL, the setting is changed so that the bending rigidity of the tab 500 is increased, and the rotational moment centered around the rivet 900 is changed to the panel tongue. It acts on the piece part 440, and thereby, the panel tongue piece part 440 can easily enter the inside of the beverage can 100. On the other hand, until the break in the panel 400 reaches the rivet line RL, the bending rigidity of the tab 500 is small, and the operator places his finger between the operated portion 505 of the tab 500 and the panel 400. Easy to put.

FIG. 5 is a view showing a base portion of the tab tongue piece 550. In other words, FIG. 5 is an enlarged view of the portion indicated by the symbol V in FIG.
FIG. 5A shows a state before the tab 500 is operated.
Although not described above, the groove 580 of the present embodiment is a trapezoidal groove as shown in FIG. Further, in the groove 580 of the present embodiment, the groove side surface 580L and the groove side surface 580R have a distance from each other and face each other.
In the present embodiment, the thin portion 590 is provided on the tab 500 by providing the groove 580.
The depth of the groove 580 is the depth Δt, and the thickness of the tab 500 is the thickness t. Further, the thickness of the thin portion 590 is the thickness (t−Δt).

FIG. 5B shows a state in which an operator's finger is put between the panel 400 and the tab 500.
When an operator's finger is put between the panel 400 and the tab 500, the tab 500 is bent so as to protrude upward in the figure as shown in FIG. At this time, in this embodiment, this bending occurs at the thin portion 590, and the tab 500 is easily bent. For this reason, the operator can easily put his finger between the panel 400 and the tab 500.

FIG. 5C shows a state after the operator's finger is put between the panel 400 and the tab 500 and then the tab 500 is further raised.
In this state, the groove side surface 580L and the groove side surface 580R come into contact with each other. Thereby, the bending rigidity in the base of the tab tongue piece part 550 increases. Thereby, the force which tries to put the panel tongue piece part 440 in the inside of the drink can 100 increases.

FIG. 6 is a diagram illustrating the groove 580.
In the above description, the case where the groove 580 is formed of a trapezoidal groove has been described as an example. However, the groove 580 is not limited to the trapezoidal groove, and other shapes may be adopted.
For example, as shown in FIG. 6A, the groove side surface 580L and the groove side surface 580R may be parallel grooves arranged in parallel to each other. Moreover, as shown to the same figure (B), it is good also as a parallel groove | channel which provided the curvature with respect to the corner of a bottom part. Similarly, the curvature can be given to the corner of the bottom of the trapezoidal groove.
Further, the range in which the groove 580 is formed is not particularly limited, and the groove 580 may be formed over the entire region in the width direction of the tab tongue piece 550, or in a part of the tab tongue piece portion 550 in the width direction. A groove 580 may be formed.

FIG. 7 is a view showing another configuration example in the vicinity of the tab tongue piece 550.
2A is a view when the tab tongue piece 550 and the like are viewed from the surface 500A side of the tab 500, and FIG. 2B is a cross-sectional view taken along the line VIIB-VIIB in FIG. FIG. 3C is a cross-sectional view taken along the line VIIC-VIIC in FIG.

In the present embodiment, bending is performed on the peripheral portion of the penetrating portion 560 and the portion where the one end 560A of the penetrating portion 560 is located and the portion where the other end 560B is located. Thereby, in this embodiment, as shown to the same figure (B) and (C), the protrusion part 586 which protrudes in the back surface 500B side of the tab 500 is provided.

Furthermore, in this embodiment, as shown in FIG. 5B, a groove 580 is formed in the protruding portion 586. Similar to the above, the groove 580 is formed so as to proceed in a direction orthogonal to (intersect) the center line CL along the longitudinal direction of the tab 500. More specifically, the groove 580 shown in this figure is formed so as to be placed on an extension line of the groove 580 shown in FIG. In the form shown in FIG. 7, the groove 580 is formed only in the protrusion 586, but the groove 580 may be formed in both the protrusion 586 and the root portion of the tab tongue piece 550.

Here, in the form shown in FIG. 7, the groove 580 can be formed in the tab 500 even if the thickness of the tab 500 is small. In addition, since the groove 580 is directly formed in the plate-like portion in the form shown in FIG. 2, it is difficult to form the groove 580 if the thickness of the tab 500 is small. .
On the other hand, in this embodiment, since the protrusion 586 is formed and the groove 580 is formed in the protrusion 586, the groove 580 can be formed even if the thickness of the tab 500 is small.

FIG. 8 is a diagram showing a root portion of the tab tongue piece 550 when the tab 500 is operated.
FIG. 8A shows a state before the operation of the tab 500 is started, and the groove 580 is provided with a groove side surface 580R and a groove side surface 580L facing each other as described above.
The depth of the groove 580 is the depth h. In the present embodiment, the protruding amount of the protruding portion 586 from the back surface 500B of the tab 500 matches the depth h. Further, in the present embodiment, the thickness of the base portion of the tab tongue piece 550 (the thickness of the tab 500 itself) is the thickness t.

FIG. 5B shows a state when an operator's finger is put between the panel 400 and the tab 500.
As the operator's finger is inserted between the panel 400 and the tab 500, the tab 500 bends at the base of the tab tongue 550. At this time, as shown in FIG. The groove side surface 580R and the groove side surface 580L are not in contact with each other, and the tab 500 is easily bent. For this reason, it becomes easy for an operator's finger to enter between the panel 400 and the tab 500.

FIG. 5C shows a state after the tab 500 is further raised.
In this state, the groove side surface 580L and the groove side surface 580R come into contact with each other. Thereby, the bending rigidity of the base part of the tab tongue piece part 550 increases.
In addition, before the groove side surface 580L and the groove side surface 580R abut, the portion of the wall thickness t is bent, but after the groove side surface 580L and the groove side surface 580R abut against the wall thickness t. Then, bending is performed on a portion having a dimension obtained by adding the protruding dimension of the protruding portion 586, and the bending rigidity is increased. In this case, as in the case described above, the force for inserting the panel tongue piece 440 into the beverage can 100 increases.

7 and 8, the case where the depth h of the groove 580 and the protruding dimension of the protruding portion 586 are the same has been described as an example. The depth h of 580 may be larger than the projecting dimension of the projecting portion 586. Further, the depth h of the groove 580 may be smaller than the projecting dimension of the projecting portion 586.
Further, the groove 580 may be formed only in the protruding portion 586, or may be formed in both the protruding portion 586 and the root portion of the tab tongue piece portion 550.
Further, in the above, the protruding portion 586 is formed by bending, but as shown in FIG. 9 (a diagram showing another configuration example in the vicinity of the tab tongue piece portion 550), the protruding portion is formed by curling. 586 may be formed.

Further, the protruding portion 586 may be formed as shown in FIGS. 17 and 18 (a diagram showing another configuration example in the vicinity of the tab tongue piece portion 550). 17A shows the state of the tab 500 on the front surface 500A side, and FIG. 17B shows the state of the tab 500 on the back surface 500B side. Further, FIG. 18 shows a state of a cross section taken along line XVIII-XVIII in FIG.

In this configuration example, a die is pressed against the tab 500 from the surface 500A side of the tab 500, and the tab 500 is embossed. As a result, two protrusions 586 that protrude toward the panel 400 are provided on the back surface 500B side of the tab 500 and at the base portion of the tab tongue piece 550, as shown in FIGS. It is formed.

Here, as shown in FIG. 17, the two protrusions 586 are arranged so as to be shifted from each other in a direction orthogonal to (intersect) the center line CL of the tab 500 (the center line along the longitudinal direction of the tab 500). Has been.
Further, as shown in FIGS. 17B and 18A, a groove 580 formed along a direction orthogonal to (intersects) the center line CL of the tab 500 is formed in each of the protrusions 586. ing. The groove 580 is formed so as to be recessed from the top side of the protruding portion 586 to the inner side of the protruding portion 586. Furthermore, as shown in FIG. 18A, each of the protrusions 586 is provided with a groove side surface 580L and a groove side surface 580R facing the groove 580.

Here, the state of the protrusion 586 when the tab 500 is operated will be described.
At the initial stage when the operation of the tab 500 is started, the groove side surface 580R and the groove side surface 580L are not in contact with each other. In such a case, as described above, the tab 500 can be easily bent, and the operator's finger can easily enter between the panel 400 and the tab 500.
Then, when the tab 500 is further operated, as shown in FIG. 18B, the groove side surface 580L and the groove side surface 580R provided in the protruding portion 586 abut against each other. Thereby, the bending rigidity of the base part of the tab tongue piece part 550 increases, and the force which tries to put the panel tongue piece part 440 (refer FIG. 4) into the inside of the drink can 100 increases.

Note that the groove 580 is not limited to the protruding portion 586 but may be formed between the two protruding portions 586 as indicated by reference numeral 17D in FIG. In other words, the groove 580 may be formed in both the protrusion 586 and the base portion of the tab tongue piece 550.
Furthermore, in FIGS. 17 and 18, the case where the protruding portion 586 is formed in a hemispherical shape has been described as an example, but the protruding portion 586 may have other shapes such as an ellipse, an oval, a rectangle, and a triangle.
Further, the cross-sectional shape of the groove 580 formed in the protruding portion 586 is not particularly limited, and may be a V shape or a rectangular shape. Furthermore, it may be an inverted trapezoidal shape.

FIG. 19 is a view showing another configuration example in the vicinity of the tab tongue piece 550. In addition, it is a view when the vicinity of the tab tongue piece 550 is viewed from the surface 500A side of the tab 500.
In this configuration example, similarly to the configuration examples shown in FIGS. 17 and 18, the mold is pressed against the tab 500 from the front surface 500 </ b> A side of the tab 500, and two protrusions project to the back surface 500 </ b> B side of the tab 500. A portion 586 is provided.
The two protrusions 586 are arranged in a state of being shifted from each other in a direction perpendicular to (intersecting) the center line CL of the tab 500 (the center line along the longitudinal direction of the tab 500).

20 is a view of the protruding portion 586 shown in FIG. 19 when viewed from the back surface 500B side of the tab 500. As shown in FIG.
The protruding portion 586 of the present embodiment is formed so that the shape when viewed from above in the drawing is an ellipse. Further, the protruding portion 586 is arranged so that the major axis direction thereof is along the center line CL (see FIG. 19) of the tab 500.

Further, a groove 580 extending along a direction orthogonal to the center line CL (see FIG. 19) of the tab 500 is formed in the protruding portion 586. Further, each of the protrusions 586 is provided with a groove side surface 580L facing the groove 580 and a groove side surface 580R.
In the present embodiment, the width of the groove 580 is different in the longitudinal direction of the groove 580, and the width of the central portion in the longitudinal direction of the groove 580 is larger than the width of the end portion in the longitudinal direction of the groove 580. It has become. In other words, the width of the groove 580 is different between the top of the protrusion 586 and the root of the protrusion 586, and the width of the groove 580 at the top of the protrusion 586 is the groove 580 at the root of the protrusion 586. It is larger than the width.

When the tab 500 is operated, the groove side surface 580L and the groove side surface 580R provided in the projecting portion 586 abut against each other as described above. Thereby, the bending rigidity of the base part of the tab tongue piece part 550 increases like the above, and the force which tries to put the panel tongue piece part 440 (refer FIG. 4) in the inside of the drink can 100 increases.

21A to 21D are views showing a method for forming the protruding portion 586 shown in FIGS.
In forming the protruding portion 586, as shown in FIG. 21A, a slit SL is formed in advance at the base portion of the tab tongue piece portion 550. Specifically, two slits SL are formed so as to correspond to the two protrusions 586.

Here, in this example, the slit SL is formed such that the width at both ends in the longitudinal direction is larger than the width at the center.
In manufacturing the tab 500, a plate material is usually punched into a plate material to form a plate-like base material from which the tab 500 is formed. During the punching process, a slit SL is formed in the base material. Keep it.

Next, as shown in FIG. 21 (B), the base material (the base material from which the tab 500 is based) (hereinafter referred to as “base material 620”) is lowered with a die 600 having an elliptical opening 610. Support from. At this time, the base material 620 is installed on the die 600 so that the slit SL is positioned inside the edge of the opening 610.

Next, as shown in FIGS. 21B and 21D, the punch 630 is advanced toward the opening 610 formed in the die 600. The tip of the punch 630 is provided with the same shape as the inner surface of the protrusion 586.
As a result, as shown in FIGS. 21C and 21D, the base material 620 is deformed so as to follow the shape of the tip of the punch 630, and the protruding portion 586 is formed.

Here, in this embodiment, the slit SL is formed at the time of forming the base material 620 as described above, the punch 630 is pressed against the base material 620 on which the slit SL is formed, and the protruding portion 586 having the groove 580 is formed. Form. In this case, the manufacturing process can be simplified compared to the case where the groove 580 is formed by pressing the mold against the protrusion 586 after the protrusion 586 is formed.

22A to 22F are diagrams showing other examples of the slit SL.
FIG. 22A illustrates a slit SL in which the width of the end portion in the longitudinal direction is larger than the width of the central portion in the longitudinal direction. In other words, a slit SL whose width gradually decreases from the end in the longitudinal direction toward the center in the longitudinal direction is illustrated.
In this example, curvature is given to the four corners of the slit (R processing is applied).

FIG. 22B illustrates a slit SL formed in a rectangular shape. In addition, the slit SL is illustrated in which the width of the end portion in the longitudinal direction is equal to the width of the central portion in the longitudinal direction. In this example, the curvature of the four corners of the slit SL is made larger than that shown in FIG. 22A, and the four corners of the slit SL are corners.

FIG. 22C illustrates a slit SL in which the width of the end portion in the longitudinal direction is equal to the width of the central portion in the longitudinal direction. Furthermore, in this example, a curvature is given to the side (short side) where the end of the slit SL in the longitudinal direction is located, and the side is formed in a semicircular shape.
In addition, in this example as well, the slit SL is formed in a substantially rectangular shape and has four sides. Of these four sides, the sides located at both ends in the longitudinal direction of the slit SL are directed outward. Curved to swell.

FIG. 22D illustrates a slit SL in which curvature is given to both end portions in the longitudinal direction and both end portions are circular.
In the example shown in FIG. 22E, the slit SL whose width at the end in the longitudinal direction is smaller than the width at the center in the longitudinal direction is illustrated. In addition, the slit SL whose width gradually increases from the end in the longitudinal direction toward the center in the longitudinal direction is illustrated.
22F illustrates a slit SL in which the width of the end portion in the longitudinal direction is larger than the width of the central portion in the longitudinal direction, like the slit SL illustrated in FIG. In this example, the four corners of the slit SL are corners.

Here, in FIG. 20, the groove 580 whose width in the end portion in the longitudinal direction is smaller than the width in the center portion in the longitudinal direction is illustrated, but on the contrary, it is longer than the width in the center portion in the longitudinal direction. When the width of the end portion in the direction is made larger, variations are less likely to occur at the abutting position when the groove side surface 580L and the groove side surface 580R abut.

In addition, in this embodiment, the tab 500 is bent at the base of the tab tongue piece portion 550, so that the width of the groove 580 is gradually narrowed. If the width of the end portion is smaller than that, the groove side surface 580L and the groove side surface 580R may collide with each other only at the base portion of the protruding portion 586.
Further, if the width of the end portion is smaller than the width of the center portion, even if the groove side surface 580L and the groove side surface 580R come into contact with each other at the top of the projecting portion 586, the contact pressure between the two contacts Variation tends to occur.
In these cases, variations tend to occur in the abutting position when the groove side surface 580L and the groove side surface 580R abut.

On the other hand, when the width of the end portion in the longitudinal direction is larger than the width of the central portion in the longitudinal direction, the groove side surface 580L and the groove side surface 580R come into contact with each other more reliably at the top of the protruding portion 586. . In this case, the abutting position when the groove side surface 580L and the groove side surface 580R abut is less likely to vary.
Further, if the width of the end portion in the longitudinal direction is larger than the width of the central portion in the longitudinal direction, stress concentration at the root portion of the protrusion 586 (the end portion in the longitudinal direction of the groove 580) is suppressed. .

23 is a cross-sectional view of the tab 500 taken along line XXIII-XXIII in FIG.
In the present embodiment, as shown in FIG. 23A, the cross-sectional shape of the protruding portion 586 is a semicircular shape. In addition, as shown in FIG. 23B, the projecting portion 586 may have a semi-elliptical cross section. Moreover, although illustration is abbreviate | omitted, the protrusion part 586 is good also considering the cross-sectional shape as a triangle, a rectangle, and a polygon.

FIG. 10 is a view showing another configuration example in the vicinity of the tab tongue piece 550.
2A is a view when the tab tongue piece 550 and the like are viewed from the surface 500A side of the tab 500, and FIG. 2B is a cross-sectional view taken along line XB-XB in FIG. FIG. FIG. 6C is a diagram showing a modification.

In this embodiment, the tab tongue piece 550 and the connecting portion 2F (see FIG. 2D) are subjected to bending as shown in FIG. 10B, and a part of the tab tongue piece 550, A part of the connecting portion 2F is projected to the panel 400 side.
If it adds, the part located in the center part in the transversal direction of the tab 500 among the tab tongue piece part 550 and the connection part 2F is protruded to the panel 400 side. More specifically, in the present embodiment, a portion of the tab 500 located around the insertion hole 540 (portion connected to the rivet 900) is projected to the panel 400 side.

Here, in general, the panel 400 is planar, and when the protruding portion 586 is formed on the back surface 500B side of the tab 500, the tab tongue piece 550 and the connection portion 2F float from the panel 400, and the tab tongue piece 550 A gap is generated between the panel 400. In such a case, it is difficult to fix the tab tongue piece 550 to the panel 400.

Further, even if the tab tongue piece 550 can be fixed to the panel 400, the protruding portion 586 is always pressed against the panel 400, which is not a preferable state. In other words, in this case, the tab 500 receives a reaction force from the panel 400 side, and the tab 500 is easily detached from the panel 400. In this case, stress is easily applied to the score line, and the score line is easily broken.

On the other hand, as in the present embodiment, when a part of the tab tongue piece 550 or a part of the connection portion 2F is projected to the panel 400 side (a convex portion is formed on the tab tongue piece 550 or the connection portion 2F). When provided, this part (the part fixed to the panel 400 by the rivet 900) can be brought into close contact with the panel 400. In this case, the tab 500 can be easily fixed to the panel 400, and the protrusion 586 can be suppressed from being pressed against the panel 400.

In the example shown in FIG. 10B, the case where the tab tongue piece portion 550 and a part of the connecting portion 2F are protruded by bending is described. However, as shown in FIG. The tab tongue piece 550 and the connection portion 2F may be partly protruded by giving a curvature to the tab tongue piece 550 and the connection portion 2F.

Further, in FIG. 10, the tab 500 having the protruding portion 586 formed by bending is described as an example. However, the tab 500 having the protruding portion 586 formed by curling (see FIG. 9) or Similarly, in the tab 500 (see FIG. 17) having the protruding portion 586 formed by embossing, the tab tongue piece portion 550 and a part of the connecting portion 2F can be protruded to the panel 400 side. .

FIG. 11 is a diagram showing another configuration example.
Here, in FIG. 11, in addition to the tab 500, a panel 400 is also displayed. FIG. 4A is a view of the tab tongue 550 and the like viewed from the surface 500A side of the tab 500, and FIG. 4B is a cross-sectional view taken along line XIB-XIB in FIG. FIG.

In this configuration example, a recess 490 is formed in the panel 400 as shown in FIG. In other words, a recessed portion 490 is formed at a position facing the protruding portion 586 provided on the tab 500, and the protruding portion 586 is housed in the recessed portion 490. In addition, in FIG. 11, although the protrusion part 586 formed by performing the bending process is illustrated, the protrusion part 586 formed by performing the curling process and the protrusion part 586 formed by performing the embossing process are also illustrated. It can be stored in the recess 490.

As described above, when the protruding portion 586 protruding toward the panel 400 is formed, when the tab 500 is fixed to the panel 400, the protruding portion 586 is pressed against the panel 400. Further, the tab tongue piece 550 and the connection part 2F come to float from the panel 400.

On the other hand, in this embodiment, since the protrusion part 586 comes to be accommodated in the recessed part 490, it is suppressed that the protrusion part 586 is pressed with respect to the panel 400, and also the tab tongue piece part 550. Further, the connection portion 2F is prevented from floating from the panel 400.
Further, in the configuration of the present embodiment, the protrusion 586 is hooked on the panel 400 (the inner surface of the recess 490), so that the rotation of the tab 500 can be suppressed.
In the present embodiment, as shown in FIG. 11A, the recess 490 is formed in a circular shape, but may have a shape other than a circular shape.

FIG. 12 is a view showing another configuration example near the tab tongue piece 550.
2A is a view when the tab tongue piece 550 and the like are viewed from the surface 500A side of the tab 500, and FIG. 2B is a cross-sectional view taken along line XIIB-XIIB in FIG. FIG. 6C is a cross-sectional view taken along the line XIIC-XIIC in FIG.
FIG. 13 is a diagram showing a state of the root portion of the tab tongue piece 550 when the tab 500 is operated.

In the present embodiment, as shown in FIG. 12B, a first contact portion 551 and a second contact portion 552 are provided at the base portion of the tab tongue piece portion 550 and on the opposite side facing the panel 400. ing. The first contact portion 551 and the second contact portion 552 are arranged so that their positions in the left-right direction in the drawing are different from each other. If it adds, the position in the longitudinal direction of the tab 500 is arrange | positioned so that it may mutually differ. More specifically, the tabs 500 are arranged so that the positions in one direction, which is the direction in which the tab 500 extends, are different from each other.

12B shows a pair of the first contact portion 551 and the second contact portion 552. As shown in FIG. 12A, the first contact portion 551 and the second contact portion 552 are shown. In FIG. 12A, the first contact portion 551 and the second contact portion 552 of the first set are provided in the upper part of the figure, and the second contact of the second set is provided in the lower part of the figure. A portion 551 and a second contact portion 552 are provided.

In addition, the 1st contact part 551 and the 2nd contact part 552 of this embodiment are comprised by the protrusion part formed by embossing with respect to the tab 500. FIG. Note that the shape of the emboss is not limited to a hemispherical shape as in this example, and examples thereof include a cone, a triangular pyramid, and a rectangular parallelepiped.
Moreover, the 1st contact part 551 and the 2nd contact part 552 are not restricted to a protrusion part like this embodiment. Each of the groove side surface 580L and the groove side surface 580R described above can also be regarded as the first contact portion 551 and the second contact portion 552.

The movement when the tab 500 is operated by the operator will be described with reference to FIG.
FIG. 5A shows a state before the tab 500 is operated by the operator.
FIG. 5B shows a state when an operator's finger is put between the panel 400 and the tab 500. When an operator's finger is inserted between the panel 400 and the tab 500, the tab 500 is bent so as to protrude upward as shown in FIG. At this time, the first contact portion 551 and the second contact portion 552 are not yet in contact with each other, and the tab 500 is easily bent.

FIG. 6C shows a state where the tab 500 is further raised after the operator's finger is put between the panel 400 and the tab 500.
If it will be in this state, the 1st contact part 551 and the 2nd contact part 552 will mutually contact, and, thereby, the bending rigidity in the base of the tab tongue piece part 550 will increase. Thereby, the force which is going to insert the panel tongue piece part 440 in the inside of the drink can 100 increases like the above.
Also in this configuration example, as shown in FIG. 10, the tab tongue piece 550 and a part of the connection portion 2F can be protruded toward the panel 400. Moreover, you may provide the recessed part 490 which accommodates the 1st contact part 551 and the 2nd contact part 552 similarly to FIG.

Further, the first contact portion 551 and the second contact portion 552 may have the form shown in FIG. 24 (a diagram showing a modification of the first contact portion 551 and the second contact portion 552). Note that FIG. 24 shows a cross-sectional state of the first contact portion 551 and the second contact portion 552.
In the example shown in FIG. 24, the top portions of the first contact portion 551 and the second contact portion 552 that are formed in a hemispherical shape do not exist, and the top portions of the first contact portion 551 and the second contact portion 552 are removed. The height dimension of the 1st contact part 551 and the 2nd contact part 552 is smaller than the aspect shown in FIG. 12, FIG.

When the protruding portions such as the first contact portion 551 and the second contact portion 552 are provided, the tab 500 is lifted from the panel 400. However, as shown in FIG. The height dimension of the contact part 551 and the second contact part 552 is reduced, and the amount of floating of the tab 500 from the panel 400 can be reduced. In addition, when the concave portion 490 that accommodates the first contact portion 551 and the second contact portion 552 is provided, the depth of the concave portion 490 can be reduced.

In the configuration in which the first contact portion 551 and the second contact portion 552 are provided, as shown in FIG. 13C, the first contact portion 551 and the second contact portion 552 are not top portions but side portions. The parts touch each other. For this reason, even if it is a structure without a top part, a malfunction does not arise in particular.
Here, for example, the first contact portion 551 and the second contact portion 552 shown in FIG. 24 perform drilling processing on the plate-like base material that is the base of the tab 500, and then perform embossing processing. Can be formed.
Also, the overall shapes of the first contact portion 551 and the second contact portion 552 shown in FIG. 24 are not particularly limited, and may be a truncated cone, a triangular truncated cone, or a rectangular parallelepiped. In addition, a through hole is formed in the top portion, but the shape of the through hole is not particularly limited, and the shape of the through hole (the shape when the through hole is viewed from the front) is, for example, It can be circular, elliptical or rectangular.

FIG. 14 is a view showing another configuration example in the vicinity of the tab tongue piece 550. FIG. 15 is a diagram showing a state of the root portion of the tab tongue piece 550 when the tab 500 is operated.
14A is a view when the tab tongue 550 is viewed from the surface 500A side of the tab 500, and FIG. 14B is a cross-sectional view taken along the line XIVB-XIVB in FIG. FIG. 3C is a cross-sectional view taken along the line XIVC-XIVC in FIG.

In the embodiment shown in FIG. 14, the groove 580 is formed by performing bead processing (bending processing). In addition, in this embodiment, the groove 580 is formed by causing a part of the tab 500 to protrude toward the surface 500 </ b> A side of the tab 500.

Here, the movement when the tab 500 is operated by the operator will be described with reference to FIG.
FIG. 5A shows a state before the tab 500 is operated by the operator.
FIG. 5B shows a state when an operator's finger is put between the panel 400 and the tab 500. When an operator's finger is inserted between the panel 400 and the tab 500, the tab 500 is bent so as to protrude upward as shown in FIG. At this time, since the groove side surface 580L and the groove side surface 580R are not yet in contact, the tab 500 is easily bent.

FIG. 6C shows a state where the tab 500 is further raised after the operator's finger is put between the panel 400 and the tab 500.
In this state, the groove side surface 580L and the groove side surface 580R come into contact with each other, thereby increasing the bending rigidity at the base of the tab tongue piece 550. Thereby, the force which is going to insert the panel tongue piece part 440 in the inside of the drink can 100 increases like the above.

In the configuration example shown in FIG. 14, bead processing is applied to the entire region in the width direction of the tab tongue piece 550 among the base portion of the tab tongue piece 550, but a part in the width direction is provided. You may make it perform bead processing with respect to this area | region. Specifically, for example, bead processing may be performed on both ends of the tab tongue piece 550 except for the central portion in the width direction. Further, the bead processing is not limited to a linear shape, and may be formed in a curved shape as shown in FIG. 16 (a diagram showing another configuration example in the vicinity of the tab tongue piece 550).

(Other)
In the embodiment described above, the aspect in which the rivet 900 is provided in the region surrounded by the score line (first score line 430) has been described as an example, but the rivet 900 is provided outside the region surrounded by the score line. Each of the configurations described above can also be applied to the configuration provided with.
Further, in the present embodiment, the case where the second score line 450 is provided has been described as an example, but each configuration described above is also applicable to the can lid 300 where the second score line 450 is not provided. it can.

2F: Connection part, 100: Beverage can, 200: Container body (can body), 300: Can lid, 400 ... Panel, 430 ... First score line, 450 ... Second score line, 490 ... Recess, 500 ... Tab, 551 ... 1st contact part, 552 ... 2nd contact part, 580 ... Groove, 586 ... Projection part, 900 ... Rivet

Claims (11)

1. A panel,
   A score line formed on the panel;
   A tab that is formed along one direction, has one end and the other end, and presses a region located inside the score line of the panel at the one end,
   A rivet for fixing a portion located between the one end and the other end of the tab to the panel;
   Positioned on the one end portion side of the tab from the rivet, connecting the rivet and the one end portion, and a connecting portion having a panel facing portion on the side facing the panel;
   A groove provided in the panel-facing portion of the connecting portion and formed so as to proceed in a direction crossing the one direction in which the tab extends;
   Can lid with.
2. The connecting portion is provided with a protruding portion protruding toward the panel side,
   The can lid according to claim 1, wherein the groove is formed in the protruding portion.
3. The can lid according to claim 2, wherein the width of the end portion in the longitudinal direction of the groove is larger than the width of the central portion in the longitudinal direction of the groove.
4. The protruding portion in which the groove is formed is a base material constituting the tab, and the mold is pressed against a portion of the base material in which the slit is formed in advance. The can lid according to claim 2, wherein the can lid is formed.
5. The can lid according to any one of claims 2 to 4, wherein a concave portion into which the protruding portion enters is formed in a portion of the panel facing the protruding portion.
6. The can lid according to any one of claims 2 to 4, wherein a portion of the connecting portion connected to the rivet protrudes toward the panel side.
7. A panel having a first surface and a second surface opposite to the first surface;
   A score line formed on the panel;
   A region that is disposed on the first surface side of the panel, is formed along one direction, has one end and another end, and is located on the inside of the score line in the panel at the one end. A tab to press,
   A rivet for fixing a portion located between the one end and the other end of the tab to the panel;
   It is located on the one end side of the tab from the rivet, connects the rivet and the one end part, has a panel facing part on the side facing the panel, and breaks the panel at the score line. A connecting portion which is generated and bent as the one end of the tab moves toward the second surface side;
   Contact portions provided on the panel facing portion of the connecting portion, arranged so that positions in the one direction are different from each other, and contacting each other with the bending of the connecting portion;
   Can lid with.
8. The can lid according to claim 7, wherein the contact portion is constituted by a protruding portion protruding from the panel facing portion of the connecting portion.
9. 9. The can lid according to claim 8, wherein the protruding portion has a shape in which a top portion of the protruding portion is removed.
10. In the region located inside the score line of the panel,
    10. The second score line formed so as to be connected to the score line and to go into the region from a connection portion with the score line. The can lid described in 1.
11. A beverage can comprising a can body containing a beverage and a can lid attached to the can body,
    A beverage can, wherein the can lid is the can lid according to any one of claims 1 to 10.

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