JP2017137078A - Can top - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a can top capable of securing pressure resistance and improving finger hooking property, the can top being used for a can container for positive pressure.SOLUTION: A can top 1 comprises: a circular panel part 11; a rivet 21 which is provided on one surface of the panel part 11; an annular groove part 12 which is provided in an annular state along an outer peripheral edge of the panel part 11 and becomes dent from one main surface to the other main surface of the panel part 11; an opening piece 27 which is formed of a score line 22 provided on the panel part 11 adjacent to the rivet 21, and which forms an opening part by breakage of the score line 22; a tab 14 which is fixed to the rivet 21, and which has a depression part 14b provided on a part on the opening piece 27 and a finger hook part 14a which is opposite to the depression part 14b sandwiching the rivet 21 therebetween; and a panel part 11 having a first recess part 23 provided on a lower side of the finger hook part 14a, and a panel part 11 having a second recess part 24 between the groove part 12 and the first recess part 23 and having a width narrower than that of the first recess part 23.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a steion tab type can lid that forms an opening of a can container.

  Conventionally, a can container is used as a container in which carbonated drinks, alcohol drinks, and the like are stored as contents. The can container is configured by integrally assembling a can lid, which forms an opening for discharging contents, on the can body by tightening.

  As such a can lid, by operating a tab fixed to the panel part via a rivet part, a part of the panel part is broken along a score line provided in the panel part to constitute an opening part. A so-called steion tab type can lid is known.

  In addition, as a steion tab type can lid, there is also known a technique in which a finger insertion recess is provided below the tab in order to make it easier to place a finger on the tab (see, for example, Patent Document 1). In addition, when the outer diameter of the can lid is small, the can lid has an annular groove formed in the peripheral part of the panel portion and the concave portion for finger insertion in order to ensure the size of the concave portion for finger insertion. A notch that is a depression is provided.

Japanese Utility Model Publication No. 6-25128

  The can lid described above has the following problems. That is, the can container may be used as a negative pressure or a positive pressure in the can container. However, when the above-described can lid is used as a lid for a can in a positive pressure can container, the pressure resistance may decrease. Further, in the above-described can lid, when buckling occurs due to internal pressure, so-called squaring that protrudes from the inside to the outside of the can container occurs in the finger insertion recess, which may impair the openability. .

  Then, this invention aims at providing the can lid | cover which can be used for the can container for positive pressures which can improve finger grip property, ensuring pressure | voltage resistance.

  In order to solve the above problems and achieve the object, the can lid of the present invention is configured as follows.

  As one aspect of the present invention, a disk-shaped panel portion, a rivet provided on one main surface of the panel portion, and an annular shape along the outer peripheral edge of the panel portion, An annular groove portion that is recessed from the main surface toward the other main surface of the panel portion and a score line provided in the panel portion adjacent to the rivet, and the score line breaks to open the opening portion. An opening piece constituting the rivet, a push-down portion fixed to the rivet and disposed at a part of the opening piece, a tab having a finger-hanging portion provided on the opposite side across the push-down portion and the rivet, and the panel And a first recess provided below the finger-hanging portion and the panel portion, and provided between the groove and the first recess, than the first recess. A second recess having a narrow width; That.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to provide providing the can lid | cover which can be used for the can container for positive pressures which can improve finger holdability, ensuring pressure | voltage resistance.

The top view which shows the structure of the can lid which concerns on the 1st Embodiment of this invention. Sectional drawing which shows the structure of the same can lid. Sectional drawing which shows the principal part structure of the can lid. Sectional drawing which shows the principal part structure of the can lid. The top view which shows the structure of the can lid concerning the 2nd Embodiment of this invention. Sectional drawing which shows the structure of the same can lid. Sectional drawing which shows the principal part structure of the can lid.

Hereinafter, the configuration of the can lid 1 according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 4.
FIG. 1 is a plan view showing the configuration of a can lid 1 according to the first embodiment of the present invention, FIG. 2 is a cross-sectional view showing the configuration of the can lid 1 in a section taken along line II-II in FIG. 1, and FIG. 1 is a cross-sectional view showing the configuration of the first recess 23 in the section taken along the line III-III in FIG. 1, and FIG. 4 is a cross-sectional view showing the configuration of the first recess 23 in the section taken along the line IV-IV in FIG.

  The can lid 1 is an opening for discharging the contents from the inside of the can container to the outside of the can container for positive pressure in which carbonated drinks, beverages such as alcohol and the like are accommodated as contents, and the inside is positive pressure. It is a member which comprises. The can lid 1 is assembled integrally with the can body of the can container by a tightening process.

  As shown in FIGS. 1 and 2, the can lid 1 includes a panel portion 11, an annular groove portion 12 provided on the outer peripheral edge of the panel portion 11, and a flange portion 13 provided on the outer peripheral edge of the annular groove portion 12. And a tab 14 that is provided on the panel unit 11 and has a finger hooking portion 14a for hooking a user's finger. The can lid 1 is configured such that the panel portion 11, the groove portion 12, and the flange portion 13 are integrally formed by pressing, and then the tab 14 is fixed to the panel portion 11.

  As shown in FIGS. 1 to 4, the panel unit 11 is formed in a disc shape. The panel portion 11 includes a rivet 21 provided on one main surface, a score line 22 provided adjacent to the rivet 21, and a first recess 23 provided on the opposite side of the score line 22 with the rivet 21 interposed therebetween. A second concave portion 24 provided between the groove portion 12 and the first concave portion 23, a convex bead 25, and a convex portion 26 provided below the tab 14.

  The rivet 21 is provided on one main surface of the panel portion 11, in other words, on the main surface of the panel portion 11 positioned on the outer surface side when provided on the can body of the can container. The rivet 21 is formed in a columnar shape that protrudes from one main surface of the panel portion 11 at substantially the center of the panel portion 11. The rivet 21 is provided by extruding the center of the panel portion 11 into a cylindrical shape. Further, the rivet 21 is configured so that the tab 14 can be fixed to the panel portion 11 by being crushed after the tab 14 is arranged.

  The score line 22 is broken to form an opening piece 27 for forming the opening of the can lid 1 in the panel portion 11. The score line 22 is provided in a substantially elliptical shape from the vicinity of the rivet 21 to the vicinity of the outer peripheral edge of the panel portion 11.

  The score line 22 constitutes a fragile portion that breaks the panel portion 11 in the shape of the opening piece 27 in the shape of the opening when a part of the panel portion 11 is broken by an external force. The score line 22 is a groove provided on the panel portion 11 in the shape of the outer peripheral edge of the opening piece 27 so that the opening piece 27 is partially continuous with the other panel portion 11.

  The score line 22 is formed in an elliptical shape with the vicinity of the rivet 21 as a starting end, bypassing the vicinity of the outer peripheral edge of the panel unit 11 and terminating at the vicinity of the starting end. The score line 22 includes a main score line 22a and a sub-score line 22b provided on the opening piece 27 side adjacent to the main score line 22a and configured substantially parallel to the main score line 22a. . The minor score line 22b is constituted by a groove shallower than the main score line 22a, and the remaining thickness of the panel portion 11 provided with the minor score line 22b is the remaining thickness of the panel portion 11 provided with the main score line 22a. Is made thicker.

  Here, the remaining thickness of the panel unit 11 refers to a thickness in which no groove is provided by the score line 22 of the panel unit 11. That is, the score line 22 is configured such that the groove of the main score line 22a is deeper than the groove of the sub score line 22b, so that when the external force is applied, the main score line 22a breaks and the sub score line It is comprised so that 22b may not fracture | rupture.

  In other words, the opening piece 27 is an area of the panel portion 11 partitioned by the score line 22, and the opening is formed in the area of the panel portion 11 when the score line 22 is broken. The opening piece 27 is continuous with the panel unit 11 through the score line 22 and is separated from the panel unit 11 along the score line 22 by applying an external force on the opening piece 27 except for a part. The opening portion of the can lid 1 is formed in the panel portion 11.

  The first recess 23 is a recess provided in the panel unit 11. The first recess 23 is provided on one main surface of the panel portion 11 and below the finger hooking portion 14 a of the tab 14. The first recess 23 constitutes a finger insertion space between the finger-hanging portion 14 a and the panel portion 11.

  The first recess 23 is a flat bottom surface 23 a configured so that the surface direction is parallel to the main surface of the panel portion 11, and a slope that integrally connects one main surface of the panel portion 11 and the outer peripheral edge of the bottom surface portion 23 a. Part 23b. The slope portion 23b has different inclination angles on the one main surface side of the panel portion 11 and the outer peripheral edge side of the bottom surface portion 23a.

  As shown in FIG. 4, for example, the slope portion 23b has two different inclination angles θ1 and θ2, and the inclination angle θ1 on the main surface side of the panel portion 11 is larger than the inclination angle θ2 on the bottom surface portion 23a side. Largely composed. Here, the inclination angles θ1 and θ2 are angles from the extension of the bottom surface portion 23a to the outer surface of the inclined surface of the inclined surface portion 23b through the inclined surface on the back surface side of the inclined surface portion 23b. The inclined surface on the back side is the other main surface side of the panel portion 11, in other words, an inclined surface located inside the can container when the can lid 1 is provided on the can container.

  The depth of the first recess 23 from one main surface of the panel portion 11 is configured to be deeper than the depth of the second recess 24 from one main surface of the panel portion 11. Here, the depth of the first recess 23 is a distance from the surface of one main surface of the panel portion 11 to the deepest portion of the first recess 23.

  The second recess 24 is a recess provided in the panel unit 11. The second recess 24 is provided on one main surface of the panel part 11 and is provided between the first recess 23 of the panel part 11 and the groove part 12. In other words, the second concave portion 24 is a cutout portion in which the first concave portion 23 and the groove portion 12 are continuous, and the second concave portion 24 is a flat bottom surface portion configured so that the main surface of the panel portion 11 is parallel to the surface direction. 24a, and the slope part 24b which continues the outer periphery of one main surface of the panel part 11, and the bottom face part 24a integrally. The slope portion 24b is configured by one inclination angle.

  The width of the second recess 24 is configured to be narrower than the width of the first recess 23. For example, the width of the second recess 24 gradually decreases from the groove 12 toward the first recess 23. Here, the widths of the first recess 23 and the second recess 24 are the first recess 23 and the second recess in the direction orthogonal to the axis passing through the centers of the rivet 21, the first recess 23, and the second recess 24. The width is 24.

  The convex bead 25 is provided so as to protrude from one main surface of the panel portion 11. One or a plurality of convex beads 25 are provided. For example, the convex bead 25 is provided in a part around the tab 14 and the score line 22 and in the opening piece 27.

  The convex part 26 is a protrusion provided so as to protrude from one main surface of the panel part 11. For example, two convex portions 26 are provided. The convex portion 26 is the panel portion 11 and is provided below the tab 14 and is configured to be able to interfere with a surface of the tab 14 facing the panel portion 11. In other words, the protrusion 26 interferes with the tab 14, thereby supporting the tab 14 in a state where the tab 14 is separated from the panel portion 11, and constantly urging the tab 14 in a direction away from the panel portion 11. It is. In addition, the convex part 26 is comprised so that the tab 14 can be supported by the height which the push-down part 14b mentioned later of the tab 14 does not press the opening piece 27. FIG.

  The depth of the groove portion 12 from one main surface (surface) of the panel portion 11 is configured to be deeper than the depth of the first concave portion 23 and the second concave portion 24 from one main surface of the panel portion 11.

  The flange portion 13 is integrally formed with the can body by being tightened with the can body of the can container. The flange portion 13 is provided with a sealing resin layer on the surface that contacts the can body.

  The tab 14 includes a finger hook portion 14 a provided on one side, a push-down portion 14 b provided on the other side via the rivet 21, and a base portion 14 c fixed to the rivet 21. The finger hook portion 14a is configured such that the distance from the base portion 14c is longer than the distance from the base portion 14c to the push-down portion 14b.

  The end of the finger hook 14 a is disposed on the first recess 23. In addition, the end portion of the finger hook portion 14 a is curved and protrudes in a direction away from the main surface of the panel portion 11. The push-down portion 14b is disposed on the opening piece 27 on the rivet 21 side, and when the finger-hanging portion 14a is lifted in a direction away from the panel portion 11, the opening piece 27 is pressed and the score line 22 can be broken. Composed.

  According to the can lid 1 used for the can container configured as described above, the second recess 24 is configured so that the width of the second recess 24 is narrower than the width of the first recess 23, whereby the finger hooking portion 14 a of the tab 14 is formed by the second recess 24. It is possible to improve the finger insertion property of putting a finger downward. In addition, the can lid 1 can suppress a decrease in strength due to the formation of the second recess 24 because the first recess 23 is relatively wide.

  Further, the can lid 1 is configured so that the depth of the groove 12 is deeper than the depth of the first recess 23 and the second recess 24, and the depth of the first recess 23 is deeper than the depth of the second recess 24. By doing so, it is possible to improve the finger insertion property of the tab 14 below the finger-hanging portion 14a while maintaining the strength.

  In particular, in the can lid 1 used for the can container, even when the diameter of the can container, that is, when the diameter of the panel portion 11 is small, the shape of the tab 14 used is the same size. Since it is used, the distance from the finger hooking part 14a of the tab 14 to the groove part 12 becomes short. However, according to the can lid 1, the second concave portion 24 is provided between the first concave portion 23 that is a concave portion for inserting a finger and the groove portion 12, and the depth gradually increases from the second concave portion 24 to the first concave portion 23. By doing so, even if it is a can container with a small diameter of the panel part 11, it becomes easy to put a finger on the finger-hanging part 14a.

  Further, the can lid 1 maintains the strength in the vicinity of the finger-hanging portion 14 a by the first concave portion 23 and the second concave portion 24 as described above, and the strength of the panel portion 11 is improved by the convex bead 25. As a result, even when the can lid 1 is used in a positive pressure can container, the so-called buckling, which is a so-called buckling, can be prevented from causing a deformation that the surface of the panel portion 11 protrudes due to a high internal pressure. Further, even if the panel portion 11 is deformed due to buckling, the place where the buckling occurs can be a portion located in the width direction of the first recess 23 of the panel portion 11. Thus, it is possible to maintain the finger insertion property into the finger hooking portion 14a. Further, by causing buckling in the portion, it is possible to prevent the score line 22 from being broken due to the tab 14 being pushed up due to deformation in the protruding direction of the panel portion 11 due to buckling.

  Furthermore, the slope 23b of the first recess 23 is formed to have different inclination angles on one main surface side of the panel portion 11 and the outer peripheral edge side of the bottom surface portion 23a, thereby improving the strength of the slope portion 23b. Can do. In other words, the inclined surface portion 23b is bent so as to have a plurality of inclination angles, so that the strength of the inclined surface portion 23b is improved as compared with the case where the inclined surface portion 23b is formed with an inclined surface having one inclination angle. Can do. Thereby, the fall of the intensity | strength by forming the 2nd recessed part 24 can fully be suppressed, and the intensity | strength of the can lid | cover 1 can be maintained.

  Further, since the inclination angle θ1 on the main surface side of the panel portion 11 of the slope portion 23b is configured to be larger than the inclination angle θ2 on the bottom surface portion 23a side, the volume of the first recess 23 can be increased. The lid 1 can improve finger insertability.

  As described above, according to the can lid 1 according to the first embodiment of the present invention, it is possible to improve finger holdability while ensuring pressure resistance that can be used for a positive pressure can container. .

  Next, the structure of the can lid 1A according to the second embodiment of the present invention will be described with reference to FIGS. FIG. 5 is a plan view showing the configuration of a can lid 1A according to the second embodiment of the present invention, FIG. 6 is a cross-sectional view showing the configuration of the can lid 1 along the line VI-VI in FIG. 5, and FIG. FIG. 2 is a cross-sectional view showing the configuration of one first concave portion 23 taken along line VII-VII in FIG. 1. In addition, in the structure of 1 A of can lids concerning 2nd Embodiment, the same code | symbol is attached | subjected to the structure similar to 1 A of can lids concerning 1st Embodiment, and the detailed description is abbreviate | omitted.

  The can lid 1A is an opening for discharging the contents from the inside of the can container to the outside of the can container for positive pressure in which drinks such as carbonated drinks and alcohol are accommodated as the contents. It is a member which comprises. The can lid 1A is integrally assembled to the can body of the can container by a tightening process.

  As shown in FIGS. 5 and 6, the can lid 1 includes a panel portion 11 </ b> A, an annular groove portion 12 provided on the outer peripheral edge of the panel portion 11 </ b> A, and a flange portion 13 provided on the outer peripheral edge of the annular groove portion 12. And a tab 14 provided on the panel portion 11A.

  As shown in FIGS. 5 to 7, the panel portion 11A is formed in a disc shape. The panel portion 11A has a flat center panel portion 51 that is recessed in the center than the other portions, a rivet 21, a score line 22, a first concave portion 23, a second concave portion 24, a convex bead 25A, And a convex portion 26 provided below the tab 14.

  The center panel portion 51 is configured to be flat and continues to the other portion of the panel portion 11 by an inclined surface. The center panel 51 is provided with a rivet 21, a score line 22 (opening piece 27), a first recess 23, a second recess 24, a convex bead 25A, and a convex 26.

  The depth of the center panel portion 51 is configured to be shallower than the depth of the groove portion 12. The depth of the first recess 23 and the second recess 24 provided in the center panel portion 51 is configured to be shallower than the depth of the groove portion 12.

  The convex bead 25 </ b> A is provided so as to protrude from one main surface of the panel portion 11. A single convex bead 25 </ b> A is provided in the opening piece 27.

  The groove part 12 has a lower end at the can body side with respect to the panel part 11 (center panel part 51) with respect to the panel part 11 (center panel part 51) rather than the bottom surface parts 23a and 24a of the first recess 23 and the second recess 24. It is placed at a low position.

  The can lid 1A used for the can container configured as described above is configured such that the center panel portion 51 is provided instead of the convex bead 25 provided around the tab 14 and the score line 22 of the can lid 1 described above. .

  Like the can lid 1 described above, the can lid 1 </ b> A configured as described above can improve the finger grip property while ensuring the pressure resistance that can be used for the positive pressure can container.

  The present invention is not limited to the embodiment described above. In the above-described example, the can lid 1 has the configuration having the convex beads 25, but the configuration is not limited thereto, and the panel portion 11 may not have the convex beads 25. In the above-described example, the second concave portion 24 provided between the groove portion 12 and the first concave portion 23 has been described as a configuration in which the width gradually decreases from the groove portion 12 toward the first concave portion 23. It is not limited. The second recess 24 may be configured with a constant width. In addition, various modifications can be made without departing from the scope of the present invention.

DESCRIPTION OF SYMBOLS 1, 1A ... Can lid, 11, 11A ... Panel part, 12 ... Groove part, 13 ... Flange part, 14 ... Tab, 14a ... Finger hook part, 14b ... Push-down part, 14c ... Base part, 21 ... Rivet, 22 ... Score line, 22a ... main score line, 22b ... minor score line, 23 ... first recess, 23a ... bottom surface portion, 23b ... slope portion, 24 ... second recess, 24a ... bottom surface portion, 24b ... slope surface portion, 25, 25A ... convex bead , 26 ... convex part, 27 ... opening piece, 51 ... center panel part.

Claims (9)

A disk-shaped panel,
Rivets provided on one main surface of the panel portion;
An annular groove portion provided annularly along the outer peripheral edge of the panel portion and recessed from one main surface of the panel portion toward the other main surface of the panel portion;
Consists of score lines provided in the panel portion adjacent to the rivets, and an opening piece that forms an opening portion by breaking the score line;
A tab having a pressing part fixed to the rivet and disposed on a part of the opening piece, and a finger-holding part provided on the opposite side across the pressing part and the rivet;
A first recess provided in the panel portion and below the finger-hanging portion;
A second recess that is the panel portion and is provided between the groove and the first recess, and is narrower than the first recess;
A can lid characterized by comprising.   2. The can lid according to claim 1, wherein a depth of the first recess from the surface of the panel portion is configured to be deeper than a depth of the second recess from the surface of the panel portion.   3. The can lid according to claim 2, wherein a depth of the groove portion from the surface of the panel portion is configured to be deeper than a depth of the first concave portion and the second concave portion from the surface of the panel portion. .   The first recess includes a bottom surface portion configured in parallel with the main surface of the panel portion, and a slope portion integrally connecting one main surface of the panel portion and an outer peripheral edge of the bottom surface portion. The can lid according to claim 2, wherein the can lid is provided.   5. The can lid according to claim 4, wherein the inclined surface portion has different inclination angles on one main surface side of the panel portion and an outer peripheral edge side of the bottom surface portion.   The can lid according to claim 4, wherein the slope portion has two different inclination angles.   The can lid according to claim 1, wherein the can lid is provided with a convex portion that is the panel portion and is provided below the tab.   The can lid according to claim 7, further comprising a convex bead provided on the panel portion and provided on at least one of the tab and the score line and at least one of the opening pieces.   The panel portion has a center panel portion that is recessed from the other portion on the center side, and the rivet, the other portion, the first recess, the second recess, and the score line are provided in the center panel portion. The can lid according to claim 7.