JP2007176547A - Can lid and can - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily open a can by making both the entire region and its bottom of a recess in a curved shape swelling toward a finger hook. <P>SOLUTION: A can lid 1 has a score 14 engraved in a panel 12 and a tab 16 fixed via a rivet 18 to the surface of the panel 12 to form an opening by pushing down a region defined by the score 14 in response to an opening operation. The panel 12 has the recess 20 dented toward the rear of the panel 12 at a position opposite to the opening in relation to the rivet 18. The entire region of the recess 20 includes a region between the finger hook operation part 16a of the tab 16 and the outer rim of the panel 12 and a region below the finger hook operation part 16a, and in addition has the curved shape swelling toward the finger hook 16a. The bottom 20a of the recess 20 also has the curved shape swelling toward the finger hook 16a. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

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

  A can product containing a beverage can be manufactured by filling a can body with a beverage and winding and sealing a can lid on the open end of the body. Current can lids or cans are mainly steon tab types that can be opened while the tabs are still connected to the can lid panels in order to prevent the tabs from being thrown away, or from the viewpoint of easy tab recovery. It is made up.

  Steion tab type can lids or cans are score lines engraved on the panel part and the front side of the panel part by rivets so as to form an opening by pushing down the area defined by the score line according to the opening operation. And a fixed tab.

Patent Document 1 discloses a steion tab type can lid having a finger hanging concave portion on the outer peripheral side of a lifting end (finger holding operation portion) of a knob piece (tab). The finger-hanging recess as a whole has a shape that is slightly recessed in the rivet direction (center direction), that is, a shape that follows the arc of the outer edge of the panel portion.
JP 2001-233335 A

  In the finger hanging concave portion having an arc shape along the arc of the outer edge of the panel portion as described in Patent Document 1, the fingertip is inserted between the finger hanging concave portion and the lifting end to open the plug. When doing so, the finger is unlikely to be guided to the center of the arcuate finger hanging recess, and the movement of the finger may deviate toward the left end or right end of the arc. If the movement of the finger deviates to the left end or the right end of the arc, the tab may not be pulled straight from the center of the finger hanging recess toward the rivet but may be pulled obliquely. In this case, an appropriate force may not be applied to the opening piece by the tab, and the tab may be detached from the can lid while the opening piece is not properly bent into the can.

  On the other hand, in the can lid for positive pressure cans, a tab with a flat lifting end (finger holding operation part) is used, but at the flat lifting end, it is difficult to insert a fingertip between it and the finger hanging concave part. It may be difficult to open the plug.

  The present invention has been made with the recognition of the above problems as an opportunity. For example, an object of the present invention is to provide a can lid and a can that can be easily opened.

  According to a first aspect of the present invention, a score line engraved on a panel portion and a region defined by the score line in accordance with an opening operation are pushed down to fix the front side of the panel portion with a rivet so as to form an opening. It is intended for a can lid having a tab. Here, the panel portion has a concave portion that is recessed in the rear side direction of the panel portion at a position opposite to the position where the opening is formed when viewed from the position of the rivet. The entire region of the concave portion includes a region between the finger-hanging operation portion of the tab and the outer edge of the panel portion and a region below the finger-hanging operation portion, and a curved shape that protrudes in the direction of the finger-hanging operation portion Have The bottom surface of the recess also has a curved shape that is convex in the direction of the finger-hanging operation portion.

  According to a preferred embodiment of the present invention, the finger hanging operation part has a convex part protruding in a direction away from the panel part, and the finger hanging operation part in a direction orthogonal to a line connecting the finger hanging operation part and the rivet. It is preferable that the width of the convex portion is within a range of 40 to 60% of the width of the tab in the direction.

  According to a preferred embodiment of the present invention, the height of the convex portion is preferably in the range of 0.1 to 0.5 mm.

  According to a preferred embodiment of the present invention, the depth of the concave portion is preferably in the range of 0.5 to 1.2 mm.

  According to a preferred embodiment of the present invention, it is preferable that the bottom surface of the recess is surrounded by the inclined surface all around.

  According to a preferred embodiment of the present invention, the area of the bottom surface of the recess is preferably in the range of 10 to 40% of the area of the entire region of the recess.

  According to a preferred embodiment of the present invention, the can lid can be configured as a lid for a positive pressure can.

  According to a second aspect of the present invention, a score line engraved on the panel portion and a region defined by the score line in accordance with the opening operation are pushed down and fixed to the front side of the panel portion by a rivet so as to form an opening. A can lid for a positive pressure can having a formed tab. Here, the panel portion has a concave portion that is recessed in the rear side direction of the panel portion at a position opposite to the position where the opening is formed when viewed from the position of the rivet. The entire region of the recess includes a region between the finger-hanging operation portion of the tab and the outer edge of the panel portion, and a region below the finger-hanging operation portion. The finger-hanging operation portion has a convex portion that is convex in a direction away from the panel portion.

  According to a preferred embodiment of the present invention, the width of the convex portion in the direction orthogonal to the line connecting the finger-hanging operation portion and the rivet is in the range of 40 to 60% of the width of the tab in the direction. It is preferable.

  The third aspect of the present invention is directed to a can formed by winding a can lid around the body. Here, the can lid is fixed to the front side of the panel portion by a rivet so as to form an opening by pushing down a score line carved in the panel portion and an area defined by the score line according to the opening operation. And a tab. The panel portion has a recess that is recessed in the back side direction of the panel portion at a position opposite to the position where the opening is formed when viewed from the position of the rivet. The entire region of the concave portion includes a region between the finger-hanging operation portion of the tab and the outer edge of the panel portion and a region below the finger-hanging operation portion, and a curved shape that protrudes in the direction of the finger-hanging operation portion Have The bottom surface of the recess also has a curved shape that is convex in the direction of the finger-hanging operation portion.

  The fourth aspect of the present invention is directed to a positive pressure can formed by winding a can lid around the body. Here, the can lid is fixed to the front side of the panel portion by a rivet so as to form an opening by pushing down a score line carved in the panel portion and an area defined by the score line according to the opening operation. And a tab. The panel portion has a recess that is recessed in the back side direction of the panel portion at a position opposite to the position where the opening is formed when viewed from the position of the rivet. The entire region of the recess includes a region between the finger-hanging operation portion of the tab and the outer edge of the panel portion, and a region below the finger-hanging operation portion. The finger-hanging operation portion has a convex portion that is convex in a direction away from the panel portion.

  According to the present invention, for example, a can lid and a can that can be easily opened can be provided.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

  1 is a plan view showing a configuration of a can lid according to a preferred embodiment of the present invention, FIG. 2 is an enlarged view of a part of FIG. 1, and FIG. 3 is a cross-sectional view taken along line AA ′ of FIG. 4 is a cross-sectional view taken along the line BB ′ of FIG. 1, and FIG. 5 is a side view showing a can formed by winding the can lid shown in FIG. 1 around the opening end of the body portion.

  A can lid 1 according to a preferred embodiment of the present invention is wound by a seamer around an opening end of a trunk portion filled with a beverage such as beer, alcoholic beverage such as sparkling liquor, or non-alcoholic beverage such as soft drink. Can be tightened. FIG. 5 exemplarily shows a beverage can that can be manufactured in this way. The can lid 1 can be configured as a can lid of a positive pressure can, for example. Here, the positive pressure can refers to a can whose internal pressure is higher than atmospheric pressure. For example, a can filled with a sparkling beverage such as beer, sparkling liquor, carbonated beverage is called a positive pressure can.

  The can lid 1 includes, for example, a disk-shaped panel portion 12, an annular groove 2 around it, and a chuck wall 7 and a flange curl portion 8 around it. The flange curl portion 8 is used for winding around the opening end of the body portion 30.

  The panel part 12 can have the hollow part 6 hollow in the back side direction. Here, the front side of the panel part 12 means the side of the surface exposed to the outside in the beverage can 40 as exemplarily shown in FIG. 5, and the back side means the side of the surface that becomes the inner side. And

  A score line 14 is engraved on the panel portion 12, and a portion surrounded by the score line 14 functions as an opening piece 15 that is bent inside the can 40 to form an opening when opened. A reinforcing bead 4 can be formed in the opening piece 15.

  A tab 16 is fixed to the front side of the panel portion 12 by a rivet 18. The tab 16 forms an opening by pushing down a region to be the opening piece 15 defined by the score line 14 according to the opening operation. The rivet 18 can typically be disposed approximately at the center of the panel portion 12.

  The panel portion 12 has a recessed portion 20 that is recessed in the direction of the back side of the panel portion 12 at a position opposite to the position where the opening is formed when opening the plug (the position of the opening piece 15) when viewed from the position of the rivet 18. The entire area of the recess 20 includes a region between the finger-hanging operation portion 16a of the tab 16 and the outer edge (or the annular groove 2) of the panel portion 12 and a region below the finger-hanging operation portion 16a, and the finger-hanging operation portion 16a. (A portion marked with “a” in FIG. 2). The bottom surface 20a of the concave portion 20 also has a curved shape that is convex in the direction of the finger-hanging operation portion 16a (the portion marked with “b” in FIG. 2). The area of the bottom surface 20a of the recess 20 is preferably in the range of 10 to 40% of the area of the entire area of the recess 20.

  By making both the entire region of the recess 20 and its bottom surface 20a have a curved shape that protrudes in the direction of the finger hooking operation portion 16a, the fingertip is guided to the center portion of the recess 20 and the center portion of the tab 16 when opening. This facilitates opening and reduces unsuccessful opening.

  In addition, by making both the entire region of the recess 20 and its bottom surface 20a have a curved shape that protrudes in the direction of the finger-hanging operation portion 16a, at least the inclination angle of the inclined surface 20b on the tab 16 side of the recess 20 is made substantially constant. The can lid 1 can be easily molded (pressed).

  The width w1 of the portion where the concave portion 20 and the tab 16 overlap in the direction orthogonal to the line connecting the finger hooking operation portion 16a and the rivet 18 is preferably smaller than the width w2 of the tab 16 in this direction. Thus, when the upper can is removed in a state where the cans 30 are stacked in the height direction, the lower portion of the upper can is caught by the corner c of the tab 16 of the lower can, and the cap is accidentally opened. Can be prevented.

  As illustrated in FIG. 4, the finger hooking operation unit 16 a preferably has a convex portion that is convex in a direction away from the panel unit 12. The width w3 of the convex portion in the direction orthogonal to the line connecting the finger hooking operation portion 16a and the rivet 18 is preferably in the range of 40 to 60% of the width w2 of the tab 16 in the direction. Since the finger-hanging operation portion 16a includes a convex portion, it is easy to insert the fingertip below the finger-hanging operation portion 16a when the cap is opened, and the fingertip is centered with respect to the central portion of the convex portion. It becomes easy to be done and the failure of opening is reduced. As an example, it is preferable that w2 is about 16 mm and w3 is about 8 mm.

  It is preferable that the height of the convex portion of the finger-hanging operation portion 16a (the distance from the upper surface of the depression 6 at the lower end of the finger-hanging operation portion 16a) is in the range of 0.1 to 0.5 mm.

  The depth of the recess 20 (the distance between the surface of the panel portion 12 (the region outside the recess 6) and the bottom surface 20a of the recess 20) d is preferably in the range of 0.5 to 1.2 mm.

It is a top view which shows the structure of the can lid of suitable embodiment of this invention. FIG. 2 is an enlarged view of a part of FIG. It is sectional drawing in the AA 'line of FIG. It is sectional drawing in the BB 'line | wire of FIG. It is a side view which shows the can formed by winding the can lid shown in FIG. 1 around the opening end of a trunk | drum.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Can lid 2 Annular groove 4 Reinforcement bead 6 Recessed part 7 Chuck wall 8 Flange curl part 12 Panel part 14 Score line 16 Tab 16a Finger hook operation part 18 Rivet 20 Recess 20a Bottom 20b Inclined surface

Claims (11)

A can lid having a score line engraved on the panel part and a tab fixed to the front side of the panel part by a rivet so as to form an opening by pushing down an area defined by the score line according to an opening operation There,
The panel portion has a recess recessed in the back side direction of the panel portion at a position opposite to the position where the opening is formed when viewed from the position of the rivet, and the entire area of the recess is a finger hook of the tab It includes a region between the operation unit and the outer edge of the panel unit and a region below the finger-hanging operation unit, and has a curved shape that protrudes in the direction of the finger-hanging operation unit. It has a curved shape that is convex in the direction of the finger-hanging operation unit,
A can lid characterized by that.   The finger-hanging operation portion has a protrusion that protrudes in a direction away from the panel portion, and a width of the protrusion in a direction orthogonal to a line connecting the finger-hanging operation portion and the rivet is the height of the tab in the direction. The can lid according to claim 1, which is in a range of 40 to 60% of the width.   The height of the said convex part exists in the range of 0.1-0.5 mm, The can lid | cover of Claim 2 characterized by the above-mentioned.   The depth of the said recessed part exists in the range of 0.5-1.2 mm, The can lid | cover of any one of Claim 1 thru | or 3 characterized by the above-mentioned.   The can lid according to any one of claims 1 to 4, wherein a bottom surface of the concave portion is entirely surrounded by an inclined surface.   The can lid according to any one of claims 1 to 5, wherein an area of a bottom surface of the recess is in a range of 10 to 40% of an area of the entire region of the recess.   The can lid according to any one of claims 1 to 6, wherein the can lid is configured as a lid for a positive pressure can. A positive pressure can having a score line carved on the panel portion and a tab fixed to the front side of the panel portion by a rivet so as to form an opening by pushing down an area defined by the score line according to the opening operation A can lid,
The panel portion has a recessed portion that is recessed in the back side direction of the panel portion at a position opposite to the position where the opening is formed when viewed from the position of the rivet, and the entire area of the recessed portion is a finger hook of the tab Including a region between the operation unit and an outer edge of the panel unit and a region below the finger-hanging operation unit, wherein the finger-hanging operation unit has a convex portion that protrudes in a direction away from the panel unit. Can lid for positive pressure can.   The width of the convex portion in a direction orthogonal to a line connecting the finger operation portion and the rivet is within a range of 40 to 60% of the width of the tab in the direction. Can lid for positive pressure can. A can formed by winding a can lid around the body,
The can lid includes a score line engraved on the panel part, and a tab fixed to the front side of the panel part by a rivet so as to form an opening by pushing down an area defined by the score line according to an opening operation. Have
The panel portion has a recessed portion that is recessed in the back side direction of the panel portion at a position opposite to the position where the opening is formed when viewed from the position of the rivet, and the entire area of the recessed portion is a finger hook of the tab It includes a region between the operation unit and the outer edge of the panel unit and a region below the finger-hanging operation unit, and has a curved shape projecting in the direction of the finger-hanging operation unit. It has a curved shape that is convex in the direction of the finger-hanging operation unit,
A can characterized by that. A positive pressure can formed by winding a can lid around the body,
The can lid includes a score line engraved on the panel part, and a tab fixed to the front side of the panel part by a rivet so as to form an opening by pushing down an area defined by the score line according to an opening operation. Have
The panel portion has a recessed portion that is recessed in the back side direction of the panel portion at a position opposite to the position where the opening is formed when viewed from the position of the rivet, and the entire area of the recessed portion is a finger hook of the tab Including a region between the operation unit and an outer edge of the panel unit and a region below the finger-hanging operation unit, wherein the finger-hanging operation unit has a convex portion that protrudes in a direction away from the panel unit. Positive pressure can.

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