JP3683023B2 - Easy open can lid - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an easy open can lid that can easily open a mouth of a canned beverage.
[0002]
[Prior art]
Usually, an easy open can lid is used as a can lid of a beverage can filled with beverages such as beer, coffee beverage, carbonated beverage and fruit juice beverage. In this kind of easy open can lid, the opening score formed by lifting the tab and engraved in the open loop shape on the can lid is broken, and even if the can lid is opened, the broken opening piece generated at that time becomes the can lid. A so-called steion tab type can lid is known in which the tab is pushed into the can while being connected, and the tab is fixed to the can lid with a rivet, so that neither can be separated from the can lid.
[0003]
This type of can lid is provided with a score that continues from the start to the end along the shape of the opening in the panel, and is provided with a break opening piece that is surrounded by the score to form a break opening. Since the start end and the end of the score are discontinuously provided with a predetermined interval, the fracture opening piece remains connected to the panel when the score breaks along the score.
[0004]
The score breaks by a tab that is permanently attached to the top surface of the panel by rivets. In order to open the fracture opening, a finger is put on the grip formed on the rear end of the tab, and the tab is pulled up in a direction to stand up with respect to the panel. As a result, the rupture opening is pressed against the tip edge of the tab, and the rupture opening piece broken along the score is pushed down toward the back surface of the panel. And it is folded in the back surface side of a panel in the state with which the fracture | rupture opening piece was connected with the panel, and a panel is opened.
[0005]
By the way, the tab may rotate on the panel around the rivet in the handling process of the lid. If the tab is rotated from a predetermined position to another position when opening the break opening of the panel, or if it is rotated during the opening operation, the tip of the tab is placed on the upper surface of the break opening. When abutting, the score breaks from the position where the breakage proceeds most reliably, and a large breaking force is required when breaking the score of the break opening, which may hinder smooth breakage. Therefore, the present applicant has previously proposed a number of easy open can lids which make the tab non-rotatable by Japanese Utility Model Application No. 4-43517. As a result, the tip end of the tab was brought into contact with the appropriate position of the breaking opening to achieve a smooth breakage of the score. What could be prevented was desired.
[0006]
[Problems to be solved by the invention]
The object of the present invention is to provide an easy-open can lid that can be smoothly opened and can be easily manufactured by reliably preventing the rotation of the tab on the panel.
[0007]
[Means for Solving the Problems]
In order to achieve such an object, the first aspect of the present invention includes a panel, a score engraved in the shape of a fracture opening in the panel, a fracture opening surrounded by the score, and a tip portion of the fracture A tab that faces the opening and has a gripping portion at the rear end, and a tongue that is fixed to the middle of the rear end by a rivet formed on the upper surface of the panel. The rupture opening is pushed down toward the back side of the panel while opening the rupture opening, and a part of the rupture opening piece formed by opening the rupture opening is folded to the back side of the panel. In the easy open can lid, a convex portion protruding from the upper surface of the panel is provided at a position corresponding to the tongue piece of the panel, a notch portion corresponding to the convex portion is provided on the tongue piece, Inside Overhanging to the pair of overhang portions provided to face each other, the convex portion is bulged shape the direction orthogonal to the protruding direction of the protruding portion in a plan view generally elliptical shape whose longitudinal, the overhang parts, in order to impossible rotation of rivets around the tab through the tongue, the tip of the overhung portion is therefore Tachinobo along the side walls of the convex portion is pressed against the side walls of the convex portion It is characterized by.
[0008]
The second aspect of the present invention, the convex portions provided on both side edges towards the respective convex portions protruding to the pair of overhang portions of the tongue, a direction orthogonal to the protruding direction of the protruding portion Is formed in a generally oval shape in plan view, and the projecting portion has a tip of the projecting portion on the side wall of the projecting portion so that the tab portion cannot be rotated around the rivet of the tab through the tongue piece. characterized in that it is pressed against the side walls of the two protrusions wants Tachinobo along.
[0009]
In each aspect of the present invention, the protruding portion of the tongue piece is in contact with the convex portion, and the convex portion regulates the rotation of the tongue piece via the protruding portion. Accordingly, rotation of the tab around the rivet can be prevented, and the tip of the tab can be brought into contact with an appropriate position of the fracture opening. That is, in the first aspect of the present invention, the tongue piece is formed with a notch corresponding to the convex portion, and a pair of overhang portions formed so as to project inwardly of the notch. There, Ru Tsuppa pressed against the side walls of the convex portion. Moreover, since the convex portion is bulged and formed into a generally elliptical shape in plan view with the direction perpendicular to the protruding direction of the protruding portion as a longitudinal direction, the side wall of the protruding portion is raised with a relatively long dimension. The overhanging portion is reliably restricted by making the overhanging range relatively wide. Thereby, a tab can be reliably made non-rotatable.
Similarly, in the second aspect of the present invention, overhanging portions that protrude from both side edges of the tongue piece are pressed against and protrude from a pair of convex portions provided along both sides of the tongue piece. Moreover, since the convex portion is bulged and formed into a generally elliptical shape in plan view with the direction perpendicular to the protruding direction of the protruding portion as a longitudinal direction, the side wall of the protruding portion is raised with a relatively long dimension. The overhanging portion is reliably restricted by making the overhanging range relatively wide. Thereby, a tab can be reliably made non-rotatable.
[0010]
Moreover, in each said aspect of this invention, the said overhang | projection part is formed so that the front-end | tip may press-contact in the state which stood up along the side wall of the said convex part. In this way, in order to form the rising portion at the tip of the overhanging portion, the overhanging portion is formed so as to protrude toward the convex portion slightly larger than the interval between the edge of the tongue piece and the convex portion. You should do it. By doing this, when performing a caulking stop process that crushes the rivet to attach the tab to the panel, at the same time, simply press the protruding part of the tongue piece against the upper surface of the panel, and the tip part of the protruding part is a convex part. It can shape | mold so that it may stand along along the side wall of this convex part, and the state which this protrusion part and convex part closely_contact | adhere integrally can be formed very easily.
[0011]
In addition, even when the convex part is somewhat large due to an error during processing of the convex part, when attaching the tab to the panel, the tip of the protruding part rises by simply pressing the tongue piece against the panel upper surface. Therefore, when the tab is mounted on the panel, the tongue piece main body can be prevented from riding on the convex portion, and the tab can be reliably prevented from rotating.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
A first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a plan view of a can lid according to the first embodiment, and FIG. 2 is a sectional view taken along line II-II in FIG.
[0013]
As shown in FIG. 1, the can lid 1 is provided with a curling portion 2 for winding around the periphery thereof, and a panel 3 provided inside the curled portion 2. The panel 3 is engraved with a score 4 for opening the can lid 1, and a tab 6 is fixed to the upper surface side of the panel 3 via a rivet 5.
[0014]
The score 4 has a starting end 7 and a terminal end 8 which are continuously provided from the starting end 7 to the terminal end 8 along the shape of the breaking opening with an interval 9, and is surrounded by the score 4 and has a substantially elliptical breaking opening. Part 10 is formed.
[0015]
As shown in FIG. 1, the front end portion 11 of the tab 6 abuts on the breaking opening 10 so that the score 4 can be broken, and a grip portion 12 is provided at the rear end portion. The front end portion 11 of the tab 6 is provided at a predetermined position at the breaking opening 10 where the score 4 can be broken accurately and easily. Further, the tab 6 is provided with a tongue piece 13 fixed to the panel 3 by the rivet 5 at an intermediate position between the tip portion 11 and the grip portion 12. The tongue piece 13 is formed by punching an intermediate portion between the tip portion 11 of the tab 6 and the grip portion 12 into a substantially U shape, and includes a rivet hole 14 through which the rivet 5 can be inserted. The tongue piece 13 is fixed on the panel 3 by caulking that inserts the rivet 5 into the rivet hole 14 and crushes the rivet 5. Furthermore, the tongue 13 enables the tab 6 to swing on the panel 3.
[0016]
As shown in FIGS. 1 and 2, the panel 3 is formed with a convex portion 15 protruding at a position corresponding to the tongue piece 13. The tongue piece 13 is formed with a circular hole portion 16 that is cut out so as to surround the convex portion 15. A pair of overhanging portions 17 are formed on the inner peripheral edge of the circular hole portion 16 so as to face each other with the convex portion 15 interposed therebetween. As shown in FIG. 2, the projecting portion 17 projects toward the convex portion 15, and the tip end portion 18 rises along both side walls of the convex portion 15, and presses against both side walls of the convex portion 15. The tongue piece 13 is not rotatable. Thereby, the rotation of the tab 6 on the panel 3 is reliably prevented. The convex portion 15 is bulged and formed into a generally oval shape in plan view with the direction perpendicular to the protruding direction of the protruding portion 17 as the longitudinal direction. As a result, the side wall of the convex portion 15 is erected with a relatively long dimension, and the range in which the overhanging portion 17 is pressure-contacted is relatively widened to reliably regulate the overhanging portion 17. Further, in the present embodiment, the circular hole portion 16 corresponding to the convex portion 15 is provided in the tongue piece 13, but the circular hole portion 16 has a concave notch opened on the gripping portion 12 side of the tongue piece 13. It may be.
[0017]
The projecting portion 17 is formed to project toward the convex portion 15 slightly larger than the distance between the inner peripheral edge of the circular hole portion 16 and the convex portion 15. Thereby, when attaching the tab 6 on the panel 3, the front-end | tip part 18 of the overhang | projection part 17 can be formed in the shape which stands | starts up along the both sides wall of the convex part 15. FIG. That is, the attachment of the tab 6 on the panel 3 is performed as follows although not shown. First, the rivet hole 14 formed in the tongue piece 13 of the tab 6 is inserted into the rivet 5 of the panel 3. At this time, the convex portion 15 formed on the panel 3 corresponds to the circular hole portion 16 of the tongue piece 13. Next, the rivet 5 that protrudes upward through the rivet hole 14 is pressed and crushed, thereby fixing the tongue piece 13 on the panel 3. At the same time, the tongue piece 13 and the overhanging portion 17 are pressed onto the panel 3. At this time, the projecting portion 17 rises along both side walls of the projecting portion 15 with the distal end portion 18 contacting the projecting portion 15. For example, even if the convex portion 15 is formed to be somewhat large due to an error during processing of the convex portion 15, by pressing the tongue piece 13 and the protruding portion 17 on the panel 3, The tip portion 18 of the portion 17 rises and corresponds to the shape of the convex portion 15. In this manner, a state in which the overhanging portion 17 and the convex portion 15 are in close contact with each other can be formed very easily.
[0018]
When opening the can lid 1 configured as described above, with reference to FIG. 1, a finger is placed on the grip portion 12 of the tab 6 and the tab 6 is entirely lifted with respect to the panel 3. Although the tab 6 is made non-rotatable, the distal end portion 11 can be accurately brought into contact with a predetermined position of the breaking opening 10. Although not shown in the drawing, a break opening piece formed by opening the break opening 10 while opening the break opening 10 by pushing down the break opening 10 toward the back surface of the panel 3 while breaking the score 4 by the tab 6. Folded to the back side of the panel in a state where a part is connected to the panel 3. As described above, since the press-contact of the protruding portion 17 to the convex portion 15 is maintained even during the opening operation, the rotation of the tab 6 around the rivet 5 through the tongue piece 13 is reliably prevented. The can lid 1 can be opened very easily.
[0019]
Next, a second embodiment of the present invention will be described with reference to FIGS. FIG. 3 is a plan view of the can lid according to the second embodiment, and FIG. 4 is a sectional view taken along line IV-IV in FIG.
[0020]
In addition, in 2nd Embodiment, about the thing which makes the same structure as the can lid 1 of the said 1st Embodiment, the same code | symbol is attached | subjected in a figure and the description is abbreviate | omitted.
[0021]
As shown in FIG. 3, the can lid 20 of the second embodiment is provided with a tab 21 in the same manner as the can lid 1 of the first embodiment. A pair of projecting portions 23 projecting from both side edges are provided. On the other hand, the panel 24 is formed with a pair of convex portions 25 projecting along both sides of the tongue piece 22. That is, the tongue piece 22 is located between the pair of convex portions 25, and the overhang portions 23 project toward the respective convex portions 25, and the tip end portions 26 (shown in FIG. 4) are on the side walls of the both convex portions 25. The tongue piece 22 is made non-rotatable by pressure contact. Similar to the first embodiment, the convex portion 25 is bulged and formed into a generally elliptical shape in plan view with the direction perpendicular to the protruding direction of the protruding portion 23 as the longitudinal direction. Accordingly, the side wall of the convex portion 25 is raised with a relatively long dimension, and the range in which the overhanging portion 23 is press-contacted is made relatively wide so that the overhanging portion 23 is reliably regulated.
[0022]
As shown in FIG. 4, the protruding portion 23 has a tip portion 26 rising along the inner wall of each convex portion 25 and press-contacting the both convex portions 25. The tabs 21 on the panel 24 are reliably prevented from rotating by being pressed down by the protruding portion 23.
[0023]
The overhanging portion 23 is formed so as to overhang toward the convex portion 25 slightly larger than the distance between each side edge thereof and each convex portion 25. The attachment of the tab 21 on the panel 24 is the same as that of the first embodiment described above. When the rivet 5 is crushed and the tongue piece 22 is fixed on the panel 24, the tongue piece 22 and the tension member 22 are attached. By simply pressing the protruding portion 23 onto the panel 24, the protruding portion 23 rises along the inner walls of both protruding portions 25 with the tip portion 26 contacting the protruding portion 25. At this time, even if each convex portion 25 is formed to be somewhat large due to an error in processing the convex portion 25, the tip end portion 26 of the overhang portion 23 pressed on the panel 24 is It rises along the side wall and can be made to correspond to the shape of the convex portion 25, and a state where the projecting portion 23 and the convex portion 25 are in close contact with each other can be formed very easily.
[Brief description of the drawings]
FIG. 1 is a plan view of a can lid according to a first embodiment of the present invention.
2 is a cross-sectional view taken along line II-II in FIG.
FIG. 3 is a plan view of a can lid according to a second embodiment of the present invention.
4 is a cross-sectional view taken along line IV-IV in FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1,20 ... Easy open can lid, 3,24 ... Panel, 4 ... Score, 5 ... Rivet, 6, 21 ... Tab, 10 ... Breaking opening part, 11 ... Tip part, 12 ... Holding part, 13, 22 ... Tongue Pieces 15, 25 ... convex portions, 16 ... circular hole portions (notches), 17, 23 ... projecting portions.

Claims (2)

A panel, a score engraved on the panel in a shape of a break opening, a break opening surrounded by the score, a front end facing the break opening and a gripping portion at the rear end, and a front end A tab having a tongue piece fixed by a rivet formed on the upper surface of the panel at an intermediate position of the rear end portion, and breaking the score with the tab while pushing down the breaking opening toward the back surface of the panel In the easy open can lid that is folded to the back side of the panel in a state where a part of the rupture opening piece formed by opening and opening the opening is connected to the panel,
Providing a protrusion projecting from the upper surface of the panel at a position corresponding to the tongue of the panel,
The tongue piece is provided with a notch corresponding to the convex portion,
Facing each other inwardly of the cutout portion overhanging to the pair of overhang portions provided,
The convex portion is bulged and formed into a substantially elliptical shape in plan view with the direction orthogonal to the protruding direction of the protruding portion as a longitudinal direction,
The protruding portion, in order to impossible rotation of rivets around the tab through the tongue, both side walls of the wants and convex portions Tachinobo along the side walls of the tip is the convex portion of the overhung portion easy-open can lid, characterized in that it is pressed against the. A panel, a score engraved on the panel in a shape of a break opening, a break opening surrounded by the score, a front end facing the break opening and a gripping portion at the rear end, and a front end A tab having a tongue piece fixed by a rivet formed on the upper surface of the panel at an intermediate position of the rear end portion, and breaking the score with the tab while pushing down the breaking opening toward the back surface of the panel In the easy open can lid that is folded to the back side of the panel in a state where a part of the rupture opening piece formed by opening and opening the opening is connected to the panel,
Providing a pair of protrusions protruding from the upper surface of the panel along both sides of the tongue of the panel,
Provided on both side edges towards the respective convex portions protruding to the pair of overhang portions of the tongue
The convex portion is bulged and formed into a substantially elliptical shape in plan view with the direction orthogonal to the protruding direction of the protruding portion as a longitudinal direction,
Press the projecting portion, in order to impossible rotation of rivets around the tab through the tongue, the tip of the overhung portion is therefore Tachinobo along the side wall of the convex portion on the side walls of the two protrusions easy-open can lid, characterized in that it has been.

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