WO2023095886A1 - Couvercle de boîte et contenant de canette - Google Patents

Couvercle de boîte et contenant de canette Download PDF

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Publication number
WO2023095886A1
WO2023095886A1 PCT/JP2022/043592 JP2022043592W WO2023095886A1 WO 2023095886 A1 WO2023095886 A1 WO 2023095886A1 JP 2022043592 W JP2022043592 W JP 2022043592W WO 2023095886 A1 WO2023095886 A1 WO 2023095886A1
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WO
WIPO (PCT)
Prior art keywords
layer
lid
panel
score line
container
Prior art date
Application number
PCT/JP2022/043592
Other languages
English (en)
Japanese (ja)
Inventor
正博 塩谷
朋彦 小柳
Original Assignee
大和製罐株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 大和製罐株式会社 filed Critical 大和製罐株式会社
Publication of WO2023095886A1 publication Critical patent/WO2023095886A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D17/00—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions
    • B65D17/28—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions at lines or points of weakness
    • B65D17/34—Arrangement or construction of pull or lift tabs
    • B65D17/347—Arrangement or construction of pull or lift tabs characterised by the connection between the tab and a detachable member or portion of the container
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D17/00—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions
    • B65D17/28—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions at lines or points of weakness
    • B65D17/40—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions at lines or points of weakness characterised by having the line of weakness extending circumferentially of the container mouth

Definitions

  • the present invention relates to can lids and can containers used for sparkling beverages.
  • can lids used for can containers for sparkling beverages such as beer have a partial opening in the panel portion of the can lid.
  • a stay-on-tab type can lid (SOT can lid) having a pressure drop is used (see, for example, Patent Document 1).
  • SOT can lid When the above-described SOT can lid is used, the opening serving as the drinking mouth is smaller than the opening of a beverage container such as a cup or mug. For this reason, there is a problem that the can container does not have the comfort of drinking sparkling beverages in a glass, mug, or the like.
  • an object of the present invention is to provide a can lid and a can container in which the opening piece can be easily discarded even if it is a full-open type.
  • the can lid includes a disk-shaped panel portion, a flange portion that is seamed with the can body, and the panel portion on the can body side with the upper surface portion of the panel portion as the first layer. is folded back at two points to form an outer protective portion formed by the first, second, and third layers, and the outer protective portion and the third layer are continuous in the radial direction of the third layer.
  • a protection part having an inner protection part formed by the third layer, the fourth layer and the fifth layer by folding back the panel part at two points from one side to the can body side;
  • a score line formed on the center side in the radial direction of the third layer, and a score line formed on the panel section inside the score line, and the tip portion is arranged close to the inside of the score line.
  • a tab wherein the width of the first layer and the second layer is such that the second layer and the third layer are folded back more than the first portion side where the first layer and the second layer are folded back.
  • the second part side is wide.
  • FIG. 1 is a cross-sectional view showing the configuration of a can container according to one embodiment of the present invention.
  • FIG. 2 is a cross-sectional view showing the configuration of the main part of the can container.
  • FIG. 3 is a cross-sectional view showing the structure of the can container during opening of the can lid.
  • FIG. 4 is a cross-sectional view showing the configuration of the can container after the can lid is opened.
  • FIG. 5 is a plan view showing the configuration of the can lid.
  • FIG. 6 is a cross-sectional view showing the configuration of the can lid.
  • FIG. 7 is a cross-sectional view showing an enlarged structure of the can lid.
  • FIG. 8 is an explanatory diagram showing the configuration of the protective portion of the can lid.
  • FIG. 9 is a cross-sectional view showing the configuration of a can lid according to another embodiment.
  • FIG. 10 is an explanatory diagram showing the configuration of the protective portion of the can lid.
  • FIG. 1 is a cross-sectional view showing the configuration of a can container 100 according to one embodiment of the present invention.
  • 2 to 4 are sectional views showing enlarged can lid 1 and can body 101 of can container 100.
  • FIG. 2 shows the state of the can lid 1 before opening
  • FIG. 3 shows the state of the can lid 1 during opening
  • FIG. 4 shows the state of the can lid 1 after opening.
  • FIG. 5 is a plan view showing the configuration of the can lid 1 before being fixed to the can body 101
  • FIG. 6 is a sectional view showing the configuration of the can lid 1 before being fixed to the can body 101
  • FIG. 7 is a cross-sectional view showing an enlarged configuration of the can lid 1.
  • FIG. 8 is an explanatory diagram showing an example of the configuration of the protective portion 34 of the can lid 1. As shown in FIG.
  • the can container 100 is a so-called full open type (FOE) container in which the can lid 1 is fully open.
  • the can container 100 is a positive pressure can whose internal pressure is positive.
  • the can container 100 is filled with foamable contents as contents.
  • the effervescent content is an effervescent drink. Sparkling beverages include, for example, beer, low-malt beer, beer-like alcoholic beverages, and beer-like non-alcoholic beverages. In addition, sparkling drinks are not limited to these.
  • the can container 100 includes a can lid 1 and a can body 101.
  • the can container 100 is formed by seaming and fixing the can lid 1 and the can body 101 integrally by seaming, for example, by double seaming molding after filling the beverage.
  • a can container 100 is formed by air-tightly fixing a can lid 1 and a can body 101 by a fixing portion 100a.
  • the can container 100 is, for example, a so-called two-piece can in which a bottom portion 112 and a body portion 111 of a can body 101 are integrated.
  • the can lid 1 includes a can lid body 11 and a tab 12.
  • the can lid 1 is a full open type (FOE) in which the can lid main body 11 is fully opened so that the opening occupies most of the panel portion 21 .
  • the can lid 1 is manufactured by forming the can lid main body 11 and the tab 12 in a separate process by pressing a metal plate, and then fixing the tab 12 to the panel portion 21 .
  • the metal plate forming the can lid body 11 include an aluminum alloy plate and a surface-treated steel plate having a resin film formed on the surface thereof.
  • Examples of the metal plate forming the tab 12 include an aluminum alloy plate.
  • the can lid body 11 includes a panel portion 21, an annular groove portion 22 provided on the outer peripheral edge of the panel portion 21, and an outer peripheral edge of the annular groove portion 22. and a first flange portion (flange portion) 23 provided in the .
  • the panel portion 21 is configured in a disc shape.
  • the panel portion 21 includes score lines 31 , rivet portions 32 , auxiliary score lines 33 , protective portions 34 , and finger-insertion recesses 35 .
  • the panel section 21 may have a display section 36 or the like that displays the contents of the can container 100 in Braille or the like.
  • the panel part 21 may have protrusions or recesses for product identification, design, reinforcement, or the like.
  • the panel outer peripheral portion 21a has a convex portion 21b formed on the inner surface of the can body 101 side on the score line 31 side, and an upper surface portion 21c continuous with the convex portion 21b.
  • the panel outer peripheral portion 21a which is a portion between the score line 31 and the groove portion 22 of the panel portion 21, extends outward (upward) in the axial direction of the panel portion 21 toward the center side of the panel portion 21 from the radially outer side. incline towards.
  • the convex portion 21b has, for example, an annular shape along the score line 31 and protrudes into the can container 100 from the inner surface of the panel outer peripheral portion 21a.
  • a panel outer peripheral portion 21a is formed by bending the metal plate that forms the panel portion 21, so that the upper surface portion 21c is continuous with the upper surface portion 21c between the upper surface portion 21c and the score line 31.
  • a raised portion 21b is provided.
  • the upper surface portion 21c is positioned radially outward and above the score line 31 .
  • the upper surface portion 21 c extends, for example, in a direction orthogonal to the axial direction of the panel portion 21 .
  • the radial width of the upper surface portion 21c is set to 5 mm or less.
  • the score line 31 is broken by opening the tab 12 .
  • the score line 31 is broken to form the opening of the can lid 1 in the panel portion 21 .
  • the score line 31 surrounds the area that will be the opening piece of the panel portion 21 when the opening of the can lid 1 is formed. Since the can lid 1 is of the full-open type, the score lines 31 are formed in a circular or substantially circular shape, as shown in FIG. 7, for example. By breaking the score line 31, as shown in FIG. 3 and FIG. 31 can be removed from a portion radially outward.
  • the score line 31 is a groove forming a fragile portion that partially breaks the panel portion 21 in the shape of the opening due to an external force.
  • the score lines 31 are, for example, wedge-shaped grooves provided on the outer surface of the panel section 21 , and the score lines 31 form a thin portion of the panel section 21 .
  • the outer surface of the panel portion 21 is the main surface exposed to the outside when the can lid 1 is provided on the can body 101 of the can container 100, that is, the surface constituting the upper surface of the can container 100. be.
  • the score line 31 is formed, for example, on a protective portion 34 provided on the outer peripheral edge side of the panel portion 21 .
  • the score lines 31 are formed on the upper surface of an intermediate layer 34e of the protective portion 34, which will be described later.
  • the score line 31 is not limited to a circular shape.
  • the score line 31 is formed in a partially intermittent arc shape. It may be configured to
  • the distance L in the axial direction of the can lid 1 between the upper surface portion 21c of the panel portion 21 and the uppermost portion of the score line 31 is set within the range of 0.5 to 3 mm.
  • the distance L is, for example, the axis line between the upper surface of the upper surface portion 21c and the score line 31. directional distance.
  • the uppermost portion of the score line 31 is the portion of the score line 31 arranged in the protective portion 34 that is positioned at the highest position.
  • the top of the score line 31 is a ridge between the upper surface of the intermediate layer 34 e of the protective portion 34 and the inner surface of the groove forming the score line 31 , which is located on the center side of the can lid 1 .
  • the rivet portion 32 is provided on one main surface of the panel portion 21 , specifically, on the outer surface of the panel portion 21 .
  • the rivet portion 32 is provided on the outer peripheral side of the panel portion 21 and closer to the center than the score line 31 . That is, the rivet portion 32 is provided radially inward of the score line 31 and adjacent to the score line 31 .
  • the rivet portion 32 is configured in a columnar shape protruding from one main surface of the panel portion 21 .
  • the rivet portion 32 is formed by drawing a portion of the panel portion 21 into a cylindrical shape. Further, the rivet portion 32 is crimped after the tab 12 is arranged, thereby fixing the tab 12 to the panel portion 21 . 1 to 3 and 5 to 7, the rivet portion 32 shows a state after caulking.
  • the auxiliary score lines 33 are formed near the rivet portions 32 of the panel portion 21. As shown in FIGS. A part of the auxiliary score line 33 is broken when the tab 12 is opened.
  • the auxiliary scoreline 33 includes, for example, a main scoreline 41 and a subscoreline 42 parallel to the main scoreline 41 provided on the opposite side of the main scoreline 41 from the rivet portion 32 .
  • the main score line 41 is a groove that constitutes a weak portion that breaks a part of the panel portion 21 in the shape of the opening due to an external force.
  • the main score lines 41 are, for example, wedge-shaped grooves provided on the outer surface of the panel portion 21 .
  • a portion of the panel portion 21 is formed thin by the main score line 41 . As shown in FIG. 3, the main score line 41 is broken when the tab 12 is opened, thereby allowing the rivet portion 32 to move upward.
  • the secondary score line 42 is provided radially inward of the primary score line 41 .
  • the secondary scorelines 42 are formed parallel to the primary scorelines 41 .
  • the sub-score lines 42 are, for example, wedge-shaped grooves provided on the outer surface of the panel portion 21 .
  • the sub score lines 42 are formed shallower than the main score lines 41 . That is, the thickness of the portion of the panel portion 21 where the sub-score lines 42 are provided is formed to be thicker than the thickness of the portion of the panel portion 21 where the main score lines 41 are provided. A portion of the panel portion 21 is formed thin by the sub-score lines 42 .
  • the protection portion 34 is formed by annularly folding the panel portion 21 .
  • the protective portion 34 is formed, for example, by being radially inward of the outer peripheral edge of the panel portion 21 and being folded back four times radially outward of the rivet portion 32 .
  • each layer constituting the protective portion 34 formed by folding the panel portion 21 four times is formed from the upper surface portion 21c of the panel outer peripheral portion 21a to the first layer 61, and from this first layer 61 to the can body 101 side.
  • a second layer 62, a third layer 63, a fourth layer 64, and a fifth layer 65 are described below in order.
  • a first portion 71 is formed by folding the panel portion 21 with the first layer 61 and the second layer 62
  • a second portion 72 is formed by folding the panel portion 21 with the second layer 62 and the third layer 63.
  • a portion obtained by folding the panel portion 21 with the third layer 63 and the fourth layer 64 is referred to as a third portion 73
  • a portion obtained by folding the panel portion 21 with the fourth layer 64 and the fifth layer 65 is referred to as a fourth portion 74 .
  • the protection section 34 is formed by arranging the panel section 21 in five layers.
  • the score line 31 is formed on the third layer 63 of the panel section 21 as well as the protection section 34 .
  • the protection part 34 is an outer side that protects the inner peripheral edge of the portion (panel outer peripheral part 21a) of the can body 101 of the panel part 21 that is broken at the score line 31 when the tab 12 is opened and the score line 31 is broken.
  • the outer protective portion 34a is composed of three layers of the panel portion 21, and is present on the inner peripheral edge of the panel portion 21 with the opening at the folded portion.
  • the inner protective portion 34b is composed of the three layers of the panel portion 21, and the folded portion is present at the outer peripheral edge of the portion away from the opening of the panel portion 21. As shown in FIG.
  • the protective portion 34 is formed by the panel portion 21 of the first layer 61 and the second layer 62 that are positioned on the outer surface side of the can lid 1 and are folded back.
  • a lower layer 34d formed by the panel portion 21 of the folded fourth layer 64 and the fifth layer 65 located on the inner surface side of the can lid 1, and a second layer located between the upper layer 34c and the lower layer 34d It has an intermediate layer 34e formed by the panel portion 21 of the third layer 63 folded back from the layer 62 and the fourth layer.
  • the outer protective portion 34a is formed by the upper layer 34c and part of the intermediate layer 34e, the upper layer 34c is positioned above the score line 31 and functions as a protective portion after the score line 31 is broken.
  • a portion of the upper layer 34c and a portion of the intermediate layer 34e of the panel portion 21 that constitute the outer protective portion 34a are the protrusions 21b positioned on the inner surface of the panel outer peripheral portion 21a on the score line 31 side.
  • the convex portion 21b of the present embodiment is the second portion that is the folded portion of the panel portion 21 of the second layer 62 and the third layer 63 in the structure of the outer protective portion 34a of the protective portion 34. 72.
  • the outer protective portion 34a is formed by the first portion 71 and the convex portion 21b.
  • the inner protective portion 34b is formed by part of the intermediate layer 34e and the lower layer 34d, the lower layer 34d being positioned below the score line 31 and functioning as a protective portion after the score line 31 is broken.
  • the intermediate layer 34e slopes downward, for example, from the center side of the panel portion 21 toward the outer peripheral edge side.
  • the inner protection portion 34b constitutes the outer peripheral edge of the opening piece of the panel portion 21 when the lid is opened.
  • the protective portion 34 has an outer protective portion 34 a radially outward of the score line 31 and an inner protective portion 34 b radially inward of the score line 31 .
  • the third layer 63 is not broken before the can lid 1 is opened, and the outer protective portion 34a and the inner protective portion 34b are continuous with the third layer 63. Therefore, the outer protective portion 34a and an inner protective portion 34b are integrally formed. After the can lid 1 is opened, the outer protective portion 34a and the inner protective portion 34b are separated from each other by breaking the third layer 63 from the score line 31 .
  • the outer protective portion 34a includes a first layer 61, a second layer 62 and a second layer 62 of the panel portion 21 folded back at two points toward the can body 101 side with the upper surface portion 21c of the panel outer peripheral portion 21a of the panel portion 21 as the first layer 61. It is formed by three layers 63 .
  • the inner protective portion 34b is radially inward of the score line 31 of the third layer 63, and includes the third layer 63, the fourth layer 64, and the fifth layer of the panel portion 21 folded back at two points toward the can body 101 side. It is formed by layer 65 .
  • the width of the first layer 61 and the second layer 62 folded back at the first portion 71 is wider on the second portion 72 side than on the first portion 71 side.
  • the width of the first layer 61 and the second layer 62 is the interval (gap) in the direction in which the first layer 61 and the second layer 62 face each other. That is, as shown in FIG. 8 by a first line a1 along the first layer 61 (upper surface portion 21c) and a second line a2 along the second layer 62, the first layer 61 and the second layer 62 are , so that the width increases from the first portion 71 side toward the second portion 72 side.
  • the angles of the first layer 61 and the second layer 62 are set within the range of 15° to 85°, for example.
  • the width of the third layer 63 and the fourth layer 64 folded back at the third portion 73 is narrower on the side of the fourth portion 74 (side of the score line 31) than on the side of the third portion 73.
  • the width of the third layer 63 and the fourth layer 64 is the interval (gap) in the direction in which the third layer 63 and the fourth layer 64 face each other. That is, in FIG.
  • the At least the portion of the third layer 63 adjacent to the score line 31 radially inward and the fourth layer 64 are inclined so that the width narrows from the third portion 73 side toward the fourth portion 74 side (score line 31 side). do.
  • the third layer 63 is inclined in a direction away from the can body 101 side from the radially outer side to the radially inner side with respect to the direction orthogonal to the axial direction of the panel portion 21 .
  • the third layer 63 is positioned on the extension of the fourth layer 64 radially outward.
  • a portion radially outward of the score line 31 of the third layer 63 and the second portion 72 are positioned on the radially outward extension of the fourth layer 64 .
  • the width of the fourth layer 64 and the fifth layer 65 folded back at the fourth portion 74 is narrower on the third portion 73 side than on the fourth portion 74 side (score line 31 side).
  • the width of the fourth layer 64 and the fifth layer 65 is the interval (gap) in the direction in which the fourth layer 64 and the fifth layer 65 face each other. That is, in FIG. 8, the fourth layer 64 and the fifth layer 64 are aligned along a portion radially inwardly adjacent to at least the fourth portion 74 of the fourth layer 64 and the fifth layer 65, as indicated by the fifth line a5.
  • At least a portion of the layer 65 radially inwardly adjacent to the fourth portion 74 is inclined so that the width narrows from the fourth portion 74 side (score line 31 side) toward the third portion 73 side.
  • the fifth layer 65 is inclined in a direction away from the can body 101 side from the radially outer side to the radially inner side with respect to the direction orthogonal to the axial direction of the panel portion 21 .
  • the fourth portion 74 faces radially outward.
  • the fourth portion 74 faces radially outward along a direction orthogonal to the axial direction of the panel portion 21 .
  • the radially outer top portion of the fourth portion 74 faces a part of the outer protection portion in the radial direction.
  • the top portion of the fourth portion 74 radially outward is located further than the score line 31 of the third layer 63, as indicated by a sixth line a6 perpendicular to the tangential direction of the top portion of the fourth portion 74 in FIG. It faces radially outward and the second portion 72 radially outward.
  • the width of the second layer 62 and the third layer 63 folded back at the second portion 72 is narrower on the first portion 71 side (score line 31 side) than on the second portion 72 side.
  • the width of the second layer 62 and the third layer 63 is the interval (gap) in the direction in which the second layer 62 and the third layer 63 face each other. That is, as shown in FIG.
  • the finger-putting recess 35 is located below the rear end of the tab 12 where the finger is hooked, and is recessed from the outer surface of the panel portion 21 .
  • the groove portion 22 is an annular recess that is continuously provided on the outer peripheral edge of the panel portion 21 and protrudes toward the can body side when fixed to the can body.
  • the groove portion 22 is a so-called countersink.
  • the groove 22 has a function of improving the pressure resistance of the can lid 1 .
  • the depth of the groove 22 is set within a range of 1 mm to 3 mm, for example.
  • the first flange portion 23 is seamed to the open end of the can body 101 .
  • the first flange portion 23 is provided with a sealing resin layer on the surface that contacts the can body 101 .
  • the tab 12 includes an attachment portion 51, a tip portion 52, and a finger hook portion 53.
  • the tab 12 has an attachment portion 51, a tip portion 52, and a finger hook portion 53 integrally formed.
  • the tip portion 52 presses a portion radially inwardly adjacent to the score line 31 of the panel portion 21 to break the score line 31 . do.
  • the mounting portion 51 is formed in a plate shape and has a rivet hole 51a.
  • the attachment portion 51 is continuous with the tip portion 52 and the finger hook portion 53 .
  • the rivet hole 51a is formed to have an inner diameter that allows the rivet portion 32 to be inserted therein.
  • the mounting portion 51 is fixed to the panel portion 21 by the rivet portion 32 by crimping the rivet portion 32 inserted into the rivet hole 51a.
  • the tip portion 52 is formed on the tip side of the tab 12 .
  • the distal end portion 52 has an arcuate or polygonal shape.
  • the distal end portion 52 is formed by, for example, double bending the outer peripheral edge excluding the distal end.
  • the tip portion 52 is arranged radially inward and close to the score line 31 of the panel portion 21 .
  • the finger hooking part 53 is a part on which a finger is hooked in order to lift the tab 12 when opening the tab 12 .
  • the finger hook portion 53 includes a ring hole 53a and is formed in an annular shape.
  • the finger hook portion 53 is configured in a rectangular frame shape with arcuate corners.
  • the finger hook portion 53 is formed on the opposite side of the tip portion 52 with the attachment portion 51 interposed therebetween.
  • the rear end of the finger hook portion 53 faces the finger insertion concave portion 35 .
  • the finger hook portion 53 is formed, for example, by folding the outer peripheral edge and the inner peripheral edge of the ring hole 53a so that they are doubled.
  • the can body 101 is formed in a cylindrical shape with a bottom.
  • the can body 101 includes a body portion 111 , a bottom portion 112 , a tapered portion 113 and a second flange portion 114 .
  • the trunk portion 111 is formed in a cylindrical shape.
  • the bottom portion 112 is integrally provided at one end of the body portion 111 .
  • One end (lower end) of the tapered portion 113 is integrally connected to the other end of the trunk portion 111 , and the other end (upper end) is integrally connected to the second flange portion 114 .
  • the tapered portion 113 gradually decreases in diameter from the body portion 111 side toward the second flange portion 114 side.
  • the second flange portion 114 forms the open end of the can barrel 101 .
  • the second flange portion 114 is fixed to the first flange portion 23 by seaming.
  • the ratio of the diameter of the score line 31 of the panel portion 21 to the inner diameter of the body portion 111 is set to 0.6 to 0.8.
  • the ratio between the diameter of the score line 31 of the panel portion 21 and the inner diameter of the body portion 111 is 0.6 to 0.75.
  • the diameter of the score line 31 is the maximum diameter of the score line 31
  • the inner diameter of the trunk portion 111 is the maximum inner diameter of the trunk portion 111 .
  • the diameter of the score line 31 is the inner diameter of the opening that is formed in the panel portion 21 when the lid is opened.
  • the ratio of the inner diameter of the end (upper end) of the tapered portion 113 on the side of the second flange portion 114 to the inner diameter of the end (lower end) of the tapered portion 113 on the side of the body portion 111 is, for example, 0.75 to 0.75. set to 9.
  • the inner diameter of the upper end portion of tapered portion 113 is set to be larger than the diameter of score line 31 .
  • the widths of the first layer 61 and the second layer 62 are wider on the second portion 72 side than on the first portion 71 side. Further, the first layer 61, the second layer 62 and the third layer 63 are folded back at the first portion 71 and the second portion 72 as the outer protective portion 34a. Therefore, the outer protective portion 34a has high rigidity. In addition, residual stress is generated in the outer protective portion 34a before the lid is opened. Further, since the outer protective portion 34a and the inner protective portion 34b are continuous, a part of the springback of the outer protective portion 34a after molding remains before the lid is opened.
  • the opening diameter (score diameter) of the outer protective portion 34a becomes larger than the diameter of the score line 31 before opening.
  • the opening diameter of the outer protective portion 34a is slightly larger than the maximum outer diameter of the inner protective portion 34b of the opening piece (the panel portion 21 inside the score line 31). Therefore, the opening piece can be inserted into the can container 100 . Therefore, the can lid 1 can be discarded by inserting the opening piece into the can container 100 . Thus, even if the can lid 1 and the can container 100 are of the full-open type, the opening piece can be easily discarded.
  • the width of the second layer 62 and the third layer 63 folded back at the second portion 72 is narrower on the first portion 71 side (score line 31 side) than on the second portion 72 side. Therefore, the rigidity of the outer protection portion 34a can be further improved.
  • the width of the third layer 63 and the fourth layer 64 of the inner protective portion 34b is narrower on the radially outward side than the third portion 73, which is the folded portion.
  • the fourth layer 64 faces the outer protection portion 34a along its extension. Therefore, the inner protective portion 34b forming the outer peripheral edge of the opening piece of the panel portion 21 can obtain high rigidity. Therefore, when the lid is opened, it is possible to avoid the dispersion of the stress generated for breaking the score line 31 when the tab 12 is operated.
  • the top portion of the fourth portion 74 faces a portion of the outer protection portion 34a radially outward. Therefore, the third layer 63, the fourth layer 64, and the fifth layer 65 of the inner protective portion 34b are spaced apart from each other on the outer peripheral edge side of the score line 31 side in the radial direction. Therefore, the inner protective portion 34b can be made more rigid. Therefore, when the lid is opened, it is possible to further avoid the dispersion of the stress generated for breaking the score line 31 when the tab 12 is operated.
  • the outer diameter (score diameter) of the inner protective portion 34b becomes smaller than the diameter of the score line 31 before opening. Therefore, it becomes easier to dispose of the opening piece in the can container 100 .
  • the diameter of the outer protective portion 34a becomes larger than the diameter of the score line 31 when the lid is opened, and the diameter of the inner protective portion 34b becomes smaller than the diameter of the score line 31 when the lid is opened. Since the stress generated by this change in diameter is applied to the score lines 31 at the time of opening, the stress due to manipulation of the tab 12 required for breaking the score lines 31 can be reduced.
  • the pressure inside the can container 100 is applied at the start of breakage of the score line 31 at the time of opening, so that at the beginning of breakage of the score line 31, it is easy to The score line 31 can be broken.
  • the can lid 1 and the can container 100 can improve the openability.
  • the can lid 1 and the can container 100 according to the present embodiment are of the full-open type, and the opening piece can be easily discarded.
  • the can container 100 may be configured to accommodate a foaming member that performs so-called surging, which foams the filled sparkling beverage, together with the contents.
  • a foaming member for foaming a sparkling beverage is made of a resin material such as a spherical shape or a columnar shape and accommodated in the can container 100 .
  • the can container 100 may be whipped with an ultrasonic whisk or the like before or after the lid is opened.
  • the can container 100 of the present embodiment having foaming properties is used to suppress disappearance of the foam and It is possible to obtain the same drinking comfort as the container.
  • the sparkling beverage which is the content filled in the can container 100, was given, but the sparkling beverage is not limited to the above.
  • the can container 100 when the can container 100 is filled with a sparkling beverage, it exhibits the foamability of the sparkling beverage.
  • the upper surface portion 21c extends in the direction perpendicular to the axial direction of the panel portion 21, but the present invention is not limited to this.
  • the upper surface portion 21c of the panel portion 21 is inclined in a direction away from the can body 101 side from the radially outer side to the radially inner side as in the other embodiment shown in FIGS. good too.
  • the upper surface portion 21c extends from the radially outer side (groove portion 22 side) of the can lid 1 to the inner side (score line 31 side, can The center side of the lid 1) is inclined so as to taper upward.
  • the upper surface portion 21c of the panel portion 21 is inclined radially outward and downward from the center side of the can lid 1 toward the groove portion 22 .
  • the inclination angle of the upper surface portion 21c with respect to the direction orthogonal to the vertical direction when the bottom portion 112 of the can body 101 is downward and the can lid 1 is upward is set, for example, within the range of 1° to 15°.
  • the inclination angle of the upper surface portion 21c is set within the range of 2° to 12°, more preferably within the range of 3° to 10°.
  • the distance L between the panel portion 21 and the top of the score line 31 is the same as the lowermost portion of the upper surface portion 21c of the panel portion 21 and the score line 31. is the axial distance to the top of the
  • the lowermost portion of the upper surface portion 21c of the panel portion 21 is, for example, the portion closest to the can barrel 101 side of the outer surface (upper surface) of the inclined upper surface portion 21c.
  • the lowermost portion of the upper surface portion 21c of the panel portion 21 is a portion of the inclined upper surface portion 21c that is adjacent to the upper surface portion 21c and the ridge of the groove portion 22 .
  • the score line 31 is formed on the upper surface of the third layer 63 of the protective portion 34 of the panel portion 21. It may be formed on both the upper surface and the lower surface.
  • the present invention is not limited to the above-described embodiments, and can be variously modified in the implementation stage without departing from the gist of the present invention. Further, each embodiment may be implemented in combination as appropriate, in which case the combined effect can be obtained. Furthermore, various inventions are included in the above embodiments, and various inventions can be extracted by combinations selected from a plurality of disclosed constituent elements. For example, even if some constituent elements are deleted from all the constituent elements shown in the embodiments, if the problem can be solved and effects can be obtained, the configuration with the constituent elements deleted can be extracted as an invention.

Abstract

L'invention concerne un couvercle de boîte (1) qui comprend : une partie de protection (34) comportant une partie de protection côté extérieur (34a) dans laquelle une partie de panneau (21) est repliée en deux emplacements vers un cylindre de canette (101) et qui est formée à partir d'une première couche (61), d'une deuxième couche (62) et d'une troisième couche (63), et une partie de protection côté intérieur (34b) qui est contigüe à la partie de protection côté extérieur (34a) au niveau de la troisième couche (63), dans laquelle une partie de panneau est repliée en deux emplacements vers le cylindre de canette (101) depuis le côté radialement vers l'intérieur de la troisième couche (63), et qui est formée de la troisième couche (63), d'une quatrième couche (64) et d'une cinquième couche (65) ; et une pliure (31) formée au centre dans la direction radiale de la troisième couche (63) de la partie de protection (34). La largeur de la première couche (61) et de la deuxième couche (62), au niveau d'un emplacement plus proche d'un second site (72) au niveau duquel sont repliées la deuxième couche (62) et la troisième couche (63) est plus grande que celle au niveau d'un emplacement plus proche d'un premier site (71) au niveau duquel sont repliées la première couche (61) et la deuxième couche (62).
PCT/JP2022/043592 2021-11-26 2022-11-25 Couvercle de boîte et contenant de canette WO2023095886A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2021192370A JP2023078998A (ja) 2021-11-26 2021-11-26 缶蓋及び缶容器
JP2021-192370 2021-11-26

Publications (1)

Publication Number Publication Date
WO2023095886A1 true WO2023095886A1 (fr) 2023-06-01

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PCT/JP2022/043592 WO2023095886A1 (fr) 2021-11-26 2022-11-25 Couvercle de boîte et contenant de canette

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Country Link
JP (1) JP2023078998A (fr)
TW (1) TW202337776A (fr)
WO (1) WO2023095886A1 (fr)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004155480A (ja) * 2002-11-08 2004-06-03 Daiwa Can Co Ltd 開口容易缶蓋
JP2005138852A (ja) * 2003-11-05 2005-06-02 Daiwa Can Co Ltd 開口容易缶蓋
JP2007153428A (ja) * 2005-12-07 2007-06-21 Daiwa Can Co Ltd スコア線のある缶蓋
US20080067171A1 (en) * 2006-09-19 2008-03-20 Heinicke Paul R Easy open can end with high pressure venting
JP2008254797A (ja) * 2007-04-06 2008-10-23 Showa Aluminum Kan Kk 缶蓋
JP4717822B2 (ja) * 2003-09-30 2011-07-06 コンテナ・ディベロップメント・リミテッド 缶シェルと二重巻締め缶エンド
JP2013189225A (ja) * 2012-03-13 2013-09-26 Daiwa Can Co Ltd 缶体
JP2016078923A (ja) * 2014-10-21 2016-05-16 東洋製罐株式会社 缶蓋

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004155480A (ja) * 2002-11-08 2004-06-03 Daiwa Can Co Ltd 開口容易缶蓋
JP4717822B2 (ja) * 2003-09-30 2011-07-06 コンテナ・ディベロップメント・リミテッド 缶シェルと二重巻締め缶エンド
JP2005138852A (ja) * 2003-11-05 2005-06-02 Daiwa Can Co Ltd 開口容易缶蓋
JP2007153428A (ja) * 2005-12-07 2007-06-21 Daiwa Can Co Ltd スコア線のある缶蓋
US20080067171A1 (en) * 2006-09-19 2008-03-20 Heinicke Paul R Easy open can end with high pressure venting
JP2008254797A (ja) * 2007-04-06 2008-10-23 Showa Aluminum Kan Kk 缶蓋
JP2013189225A (ja) * 2012-03-13 2013-09-26 Daiwa Can Co Ltd 缶体
JP2016078923A (ja) * 2014-10-21 2016-05-16 東洋製罐株式会社 缶蓋

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JP2023078998A (ja) 2023-06-07

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