WO2020174997A1 - Couvercle de canette - Google Patents

Couvercle de canette Download PDF

Info

Publication number
WO2020174997A1
WO2020174997A1 PCT/JP2020/003448 JP2020003448W WO2020174997A1 WO 2020174997 A1 WO2020174997 A1 WO 2020174997A1 JP 2020003448 W JP2020003448 W JP 2020003448W WO 2020174997 A1 WO2020174997 A1 WO 2020174997A1
Authority
WO
WIPO (PCT)
Prior art keywords
layer
lid
score line
panel portion
opening
Prior art date
Application number
PCT/JP2020/003448
Other languages
English (en)
Japanese (ja)
Inventor
正博 塩谷
泰知 堀江
理央 宮下
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
Priority to CN202080010462.5A priority Critical patent/CN113329944A/zh
Publication of WO2020174997A1 publication Critical patent/WO2020174997A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D51/00—Making hollow objects
    • B21D51/16—Making hollow objects characterised by the use of the objects
    • B21D51/38—Making inlet or outlet arrangements of cans, tins, baths, bottles, or other vessels; Making can ends; Making closures
    • B21D51/44—Making closures, e.g. caps
    • 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 a can open type full-open type can lid, and more particularly to a can lid having a safety breaking end after opening.
  • the can lid described in Japanese Unexamined Patent Application Publication No. 2000-62062 is composed of a metal plate on which a resin coating having corrosion resistance to the contents is formed.
  • the can lid has a disc-shaped panel portion, and a score line, which is an easily breakable line, is formed in an annular shape on the outer peripheral portion of the panel portion.
  • the inner panel part inside the score line in the radial direction of the panel part is an opening piece.
  • Each of the outer peripheral edge of the inner panel and the inner peripheral edge of the outer panel outside the score line in the radial direction is folded twice to form a multi-layered section.
  • the folded-back portion located on the score line side is a so-called protective portion, and a broken end caused by opening the can lid is in contact with these protective portions.
  • Each multi-layer portion is configured to be arranged close to each other. Specifically, the height of each multi-layer portion is set as low as possible by increasing the crushing amount of each multi-layer portion in the axial direction of the can lid. Further, the inner panel and the outer panel, are formed on substantially the same _ plane.
  • the outer peripheral portion in the radial direction of the panel portion is at the center thereof. It is formed to incline toward the inside of the container with respect to the part.
  • An annular score line is formed on the outer periphery of the panel, following the outer shape of the panel.
  • the loop portion that protects the break end caused by opening the can lid sandwiches the score line in the radial direction of the panel portion. Formed on each side ⁇ 0 2020/174 997 2 ⁇ (: 171? 2020 /003448
  • the above-mentioned loop portion is formed on the outer side of the score line in the radial direction of the panel portion.
  • These loop parts are constructed by folding the panel part twice, like the multi-layer part described in Japanese Patent Laid-Open Publication No. 2000-062-6267. Of the two folds in, the folds located on the score line side are so-called protective parts.
  • the present invention has been made in view of the above technical problem, and an object thereof is to provide a can lid that can ensure the safety of the can lid after opening and has good corrosion resistance. It is a thing.
  • the present invention includes a disc-shaped panel portion and a panel portion formed inward in the radial direction of the panel portion and along the peripheral portion of the panel portion.
  • a can lid having a second layer formed by folding back to the score line side and a third layer formed by folding back the second layer in the radial direction on the side opposite to the score line.
  • the tip of the folded-back portion between the second layer and the third layer forms a protective portion for the break end formed in the first layer by opening the can lid, and
  • the distance between the second layer and the end of the first layer on the score line side is equal to the end of the second layer and the first layer opposite to the score line. It is characterized by being narrower than the interval.
  • the multilayer portion may be formed on the outer panel portion.
  • the outer side panel portion and the inner side panel portion may be formed by bending at the score line as a boundary.
  • the can lid is formed of a metal plate having a corrosion-resistant synthetic resin coating formed on at least one of its two surfaces, and the synthetic resin coating is formed by a coating film. It may be formed.
  • the multi-layered portion is formed by folding the panel portion into three layers.
  • the tip of the folded part of the second and third layers is covered with the broken edge of the first layer caused by opening the can lid, and It is designed to function as a protection part of the.
  • the multi-layered part is formed on at least one of the inner panel part and the outer panel part.
  • the inner panel section has a multi-layer section, or both the outer panel section and the inner panel section have a multi-layer section. In either case, the distance between the second layer and the end on the score line side of the first layer in the axial direction is ⁇ 0 2020/174 997 4 ⁇ (: 171? 2020 /003448
  • each folded portion can be increased or the crushed amount of the entire multi-layered portion can be reduced without particularly impairing the so-called protection of the fractured edge of the first layer caused by opening the can lid. can do.
  • cracks and cracks on the inner surface of the can lid are less likely to occur, and it is possible to suppress the deterioration of inner surface quality due to the damage on the inner surface and to improve the corrosion resistance of the can lid.
  • the tip and the fractured edge of the first layer are close to each other, that is, the fractured edge is protected by the tip, it is difficult for a finger or the like to come into contact with the fractured edge independently, and safety is improved. improves.
  • FIG. 1 A front view showing an example of a can lid according to the present invention.
  • FIG. 2 is a cross-sectional view of the smoking lid according to the present invention taken along a straight line passing through the center thereof.
  • FIG. 3 is an enlarged sectional view showing a part of the outer peripheral portion of the smoking lid according to the present invention. MODE FOR CARRYING OUT THE INVENTION
  • the can lid seals the opening of a can container (not shown) which is filled with foods such as fruits, fish meat and vegetables as contents.
  • the above-mentioned can lid makes it easy to take out the contents, and after opening the can container and removing the opening pieces of the can lid, almost all of the can lid is used so that the can container can be used as a container. It is a so-called full-open type can lid that can be opened.
  • the above-mentioned can lid is made of aluminum or steel, or at least the inner surface that comes into contact with the contents is coated with a corrosion-resistant synthetic resin film or steel.
  • the material is a conventionally known metal plate such as an aluminum alloy, and the metal plate is press-molded.
  • the above-mentioned ⁇ instrument, and and two-piece cans bottom is configured _ body cylinder, Sri the can body and the bottom are configured as separate bodies - may be a piece can.
  • the synthetic resin coating is constructed in the same way as the conventionally known synthetic resin coating with corrosion resistance. For example, a polyester resin is used. ⁇ 0 2020/174 997 5 ⁇ (: 171? 2020 /003448
  • It is composed of a coating film of polyethylene terephthalate resin.
  • FIG. 1 is a front view showing an example of a can lid 1 according to the present invention.
  • FIG. 2 is a sectional view of the can lid 1 according to the present invention taken along a straight line passing through the center thereof.
  • the can lid 1 is provided with a disc-shaped panel portion 2, and the can lid 1 is wound around the can body (not shown) on the entire outer peripheral portion of the panel portion 2.
  • the flange portion 3 is formed. Inside the panel portion 2, in the radial direction of the can lid 1 and inside the flange portion 3, a score line 4 which is an easily breakable line is formed over the entire circumference in the circumferential direction of the panel portion 2. ..
  • An inner portion of the panel portion 2 divided by the score line 4 is an opening piece 5 corresponding to the inner panel portion of the present invention.
  • the opening operation tab 6 of the can lid 1 is attached to one side of the upper surface of the opening piece 5 in the radial direction.
  • the portion between the outside portion of the score line 4 and the flange portion 3 is the outside panel portion 7.
  • the score line 4 is a cut line or a dent line having a V-shaped cross section formed in the panel portion 2 so that a predetermined residual thickness is produced. And, it is formed as a smooth curve so that the fracture progresses smoothly.
  • the score line 4 is formed in an annular shape following the outer shape of the panel portion 2 so that the opening piece 5 can be removed from the panel portion 2. Therefore, the shape of the opening formed by removing the opening piece 5 by advancing the fracture along the score line 4 becomes the same shape as the outer shape of the opening piece 5.
  • the score line 4 is formed on the outer surface of the can lid 1. As a result, damage to the synthetic resin coating on the inner surface of the can lid 1 due to the score lines 4 formed on the panel portion 2 can be suppressed.
  • the tab 6 causes a break in a part of the score line 4 due to the lever action, and then the break up progresses along the score line 4 by pulling up the opening piece 5 to separate the opening piece 5 from the can lid 1. It is a thing. Therefore, at one end of the tab 6, there is formed a finger hook portion 8 on which the finger is pulled in order to pull up the tab 6 at the time of the opening operation, and at the other end, the opening piece 5 is pushed down and the score line 4 is pulled. A push-down part 9 is formed that causes a break in a part. Finger rest 8 is an example shown here ⁇ 0 2020/174 997 6 ⁇ (: 171? 2020 /003448
  • the push-down portion 9 extends to the vicinity of the score line 4 in the opening piece 5 and is provided in contact with or as close as possible to the opening piece 5 near the score line 4. Further, a through hole is formed on the push-down portion 9 side in the length direction of the tab 6. On the other hand, a rivet portion 10 protruding to the outer surface side of the panel portion 2 is formed at a location corresponding to the through hole in the panel portion 2. The tab 6 is attached to the panel part 2 by inserting the rivet part 10 into the through hole and caulking the upper part of the rivet part 10 protruding from the through hole.
  • a bead portion 11 that improves the rigidity of the panel portion 2 is formed in the panel portion 2.
  • the bead portion 11 has an arc shape that opens along the score line 4 and on the side of the pushing-down portion 9, and is formed on the outer surface side of the can lid 1 so as to project from the panel portion 2.
  • the finger hook 8 on the panel 2 that is, below the finger hook 8 in the height direction of the can lid 1, there is a depression on the inner surface of the can lid 1, and the finger hook 8 is touched.
  • Finger recesses 12 are formed to make it easier to put on.
  • an auxiliary score line 13 for facilitating the pulling up of the tab 6 at the initial operation of opening the can lid 1 is formed inside the rivet portion 10 in the radial direction. As shown in FIG. 1, the auxiliary score line 13 extends in an arc shape in the lateral direction (circumferential direction of the panel portion 2) of FIG. 1 from a curved portion along the outer periphery of the rivet portion 10.
  • FIG. 3 is an enlarged cross-sectional view showing a part of the outer peripheral portion of the can lid according to the present invention.
  • the outer panel portion 7 has a multi-layer portion 14 formed by folding the panel portion 2.
  • the multi-layer portion 14 includes a lower layer 15 that extends radially outward from the score line 4, an intermediate layer 16 that is located above the lower layer 15 by folding the lower layer 15 toward the score line 4 side, and an intermediate layer 16. Is folded back in the opposite direction to the score line 4 and is formed by the upper layer 17 located above the intermediate layer 16.
  • the flange portion 3 is smoothly and continuously formed on the upper layer 17.
  • the lower layer 15 corresponds to the first layer of the present invention
  • the intermediate layer 16 corresponds to the second layer of the present invention
  • the upper layer 17 corresponds to the third layer of the present invention.
  • the lower layer 15 is formed so as to be inclined with respect to the opening piece 5 inside a can container (not shown). That is, the lower layer 15 and the opening piece 5 are not formed on the same plane or the same straight line.
  • the intermediate layer 16 and the upper layer 17 and the opening piece 5 are set substantially parallel to each other.
  • the lower layer 15 and the intermediate layer 16 are smoothly connected by the first folded portion 18 and the intermediate layer 16 and the upper layer 17 are smoothly connected by the second folded portion 19. Therefore, the distance between the lower layer 15 and the intermediate layer 16 in the axial direction gradually increases from the inner side to the outer side in the semi-radial direction.
  • the thickness or height of the multi-layer portion 14 in the axial direction gradually increases from the inner side to the outer side in the radial direction.
  • the radii of curvature of the folded portions 18 and 19 are set to be substantially the same as the radius of curvature, or the radius of curvature of the first folded portion 18 is set to be larger than that of the second folded portion 19.
  • the tip portion 20 of the second folded portion 19 is above the score line 4 and is at the same radial position as the score line 4 in the radial direction, or slightly smaller than the score line 4 in the radial direction. Located on the outside. The tip 20 of the second folded-back portion 19 should be placed so as to cover the break end formed on the inner peripheral edge 1 58 of the lower layer 15 formed by opening the can lid 1. It is configured. Then, as shown in FIG. 3, in the axial direction of the can lid 1, the inner peripheral edge portion 1558 of the lower layer 15 is closer to the front end portion 20 side than the outer peripheral edge portion 15 of the lower layer 15 or the intermediate layer 1 Configured close to 6.
  • the interval 01 between the inner peripheral edge portion 15 of the lower layer 15 and the intermediate layer 16 is narrower than the interval 02 between the outer peripheral edge portion 15 of the lower layer 15 and the intermediate layer 16 in the axial direction.
  • the height in the axial direction in the space formed by the lower layer 15 and the intermediate layer 16 gradually increases from the inner side to the outer side in the radial direction.
  • the second folded portion 19 corresponds to the folded portion of the second layer and the third layer of the present invention, and the tip portion 20 of the second folded portion 19 corresponds to the protective portion of the present invention. doing.
  • the push-down part 9 is pressed against the inside of the score line 4 of the opening piece 5. Then, the auxiliary score line 13 formed in the vicinity of the rivet portion 10 is broken by the lever action of the second kind with the pressing portion 9 as the fulcrum and the rivet portion 10 as the point of action.
  • a first-type lever action occurs with the rivet portion 10 as a fulcrum and the depression portion 9 as the point of action, causing a break in the score line 4 near the depression portion 9 and the opening.
  • a part of the piece 5 is bent inside the can container by the pressing portion 9. Following this, when the tab 6 is axially lifted to the upper side of the can lid 1, the breakage gradually progresses along the score line 4, and finally the opening piece 5 is separated from the can lid 1. In this way, almost the entire surface of the can lid 1 is opened.
  • the score line 4 is ruptured from the state where the score line 4 is deformed so as to widen the groove width of the score line 4, and the can lid 1 is opened. To do. Therefore, the score line 4 can be broken with a smaller load than in the conventional case. In other words, it is possible to obtain the can lid 1 that is easy to open and has improved so-called openability. Further, in the axial direction, the inner peripheral edge portion 1558 of the lower layer 15 is arranged closer to the intermediate layer 16 than the outer peripheral edge portion 15 of the lower layer 15 is.
  • the above-mentioned tip portion 20 is in a state of being covered by the broken end formed on the inner peripheral edge portion 15 of the lower layer 15 caused by the opening. Since the front end portion 20 functions as a so-called protective portion, it becomes difficult for a finger or the like to directly touch the broken end, and the safety of the can container after opening is improved. Even if a finger touches the fractured end, since they are provided close to each other, the contact area with the finger increases, and damage to the finger or the like due to the fractured end can be suppressed.
  • the distance 0 1 between the intermediate layer 16 and the inner peripheral edge portion 15 8 of the lower layer 15 is It is configured to be narrower than the interval 0 2 between the middle layer 16 and the outer peripheral edge portion 15 of the lower layer 15.
  • the distance between the lower layer 15 and the intermediate layer 16 in the axial direction gradually increases from the inner side to the outer side in the radial direction. Therefore, the tip 20 ⁇ 0 2020/174 997 9 ⁇ (: 171? 2020 /003448
  • the radius of curvature of the first folded portion 18 and the radius of curvature of the second folded portion 19 can be increased within a range that does not impair the protection of the fractured end due to.
  • the amount of deformation and strain of the metal plate and the synthetic resin coating can be reduced, so that cracks and cracks in the metal plate and the synthetic resin coating are less likely to occur, and the inner surface quality of the can lid 1 is improved.
  • the corrosion resistance of the can lid 1 can be improved. It should be noted that, of the broken ends of the score line 4, the broken end formed on the opening piece 5 is removed together with the opening piece 5, so there is no particular problem.
  • a multi-layered portion 14 that protects the broken end of the score line 4 formed on the opening piece 5 may be formed on the outer peripheral edge of the opening piece 5 in the radial direction.
  • the tip of the folded portion between the second layer and the third layer in the radial direction is in the same position in the radial direction as the end on the score line 4 side in the first layer, or in the radial direction. It just needs to be slightly inside of line 4.
  • the tip of the folded portion between the second layer and the third layer should be covered with the broken end formed at the end on the score line 4 side of the first layer by opening the can lid 1. It suffices if it is configured as follows.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Containers Opened By Tearing Frangible Portions (AREA)

Abstract

L'invention concerne un couvercle de canette assurant la sécurité du couvercle de canette après l'ouverture et qui présente une excellente résistance à la corrosion.　Ce couvercle de canette 1 est pourvu d'une section de couche de chevauchement 14 formée sur au moins l'une parmi une partie de panneau interne 5 et une partie de panneau externe 7. Une section de pointe 20 d'une partie arrière repliée 19 entre une deuxième couche 16 et une troisième couche 17 forme une section de protection pour une extrémité à casser qui est formée sur une première couche 15 lors de l'ouverture du couvercle de canette ; et, dans la direction de la ligne axiale du couvercle de canette 1, un espace D1 entre la deuxième couche 16 et une section d'extrémité 15A d'un côté trait de découpe 4 dans la première couche 15 est plus petit qu'un espace D2 entre la seconde couche 16 et une section d'extrémité 15B du côté opposé au trait de découpe 4 dans la première couche 15.
PCT/JP2020/003448 2019-02-25 2020-01-30 Couvercle de canette WO2020174997A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202080010462.5A CN113329944A (zh) 2019-02-25 2020-01-30 罐盖

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2019031435A JP2020132252A (ja) 2019-02-25 2019-02-25 缶蓋
JP2019-031435 2019-02-25

Publications (1)

Publication Number Publication Date
WO2020174997A1 true WO2020174997A1 (fr) 2020-09-03

Family

ID=72239684

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2020/003448 WO2020174997A1 (fr) 2019-02-25 2020-01-30 Couvercle de canette

Country Status (4)

Country Link
JP (1) JP2020132252A (fr)
CN (1) CN113329944A (fr)
TW (1) TW202031559A (fr)
WO (1) WO2020174997A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113928681A (zh) * 2021-10-28 2022-01-14 珠海博瑞特包装科技有限公司 一种双保边全开盖

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54128869U (fr) * 1978-02-16 1979-09-07
JPS60204452A (ja) * 1984-03-30 1985-10-16 谷内　啓二 開口縁の安全な容器蓋
JPH0455941A (ja) * 1990-06-25 1992-02-24 Fujitsu Ltd 証拠推論実行方式
JP2006264707A (ja) * 2005-03-22 2006-10-05 Daiwa Can Co Ltd 開口容易缶蓋
JP2016078923A (ja) * 2014-10-21 2016-05-16 東洋製罐株式会社 缶蓋

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61273344A (ja) * 1985-05-22 1986-12-03 東洋製罐株式会社 開口性及び耐腐食性に優れたイ−ジイオ−プン蓋
US4940158A (en) * 1987-09-22 1990-07-10 American National Can Company Container and seam ring for container
JPH01182248A (ja) * 1987-12-25 1989-07-20 Toyo Seikan Kaisha Ltd イージイオープン蓋及びその製法
JPH02180148A (ja) * 1988-12-27 1990-07-13 Keiji Yanai 開口縁の安全な容器蓋及びその製造方法
US8221872B2 (en) * 2005-10-19 2012-07-17 Toyo Seikan Kaisha, Ltd. Easy-open end
CN206984626U (zh) * 2017-07-13 2018-02-09 谷新友 一种新型易拉罐

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54128869U (fr) * 1978-02-16 1979-09-07
JPS60204452A (ja) * 1984-03-30 1985-10-16 谷内　啓二 開口縁の安全な容器蓋
JPH0455941A (ja) * 1990-06-25 1992-02-24 Fujitsu Ltd 証拠推論実行方式
JP2006264707A (ja) * 2005-03-22 2006-10-05 Daiwa Can Co Ltd 開口容易缶蓋
JP2016078923A (ja) * 2014-10-21 2016-05-16 東洋製罐株式会社 缶蓋

Also Published As

Publication number Publication date
TW202031559A (zh) 2020-09-01
CN113329944A (zh) 2021-08-31
JP2020132252A (ja) 2020-08-31

Similar Documents

Publication Publication Date Title
JP4731188B2 (ja) 開口容易缶蓋
JP4883995B2 (ja) スコア線のある缶蓋
US4503989A (en) Can end with retained tear strip
US8904843B2 (en) Can end and method of making same
JP5520232B2 (ja) 缶端部
CA2662199A1 (fr) Extremite de canette a ouverture facile avec ventilation haute pression
WO2020174997A1 (fr) Couvercle de canette
US5950859A (en) Container with sealing member
EP2858911B1 (fr) Fermeture à ouverture facile avec performance de pression améliorée
CN107207120B (zh) 用于容器的封闭件以及设置有所述封闭件的容器
KR101747986B1 (ko) 용기용 패널과 이러한 패널이 구비된 용기 및 그 제조방법
JP5124395B2 (ja) 蓋付カップ容器
JP3883089B2 (ja) 開口容易な缶蓋
JP6476731B2 (ja) 缶蓋
JP2004161360A (ja) 開口容易缶蓋
WO2021241639A1 (fr) Couvercle de canette
JP2012131518A (ja) 開口容易缶蓋
JP2005507833A (ja) イージーオープン式閉鎖体、当該閉鎖体を備えた容器、及び、当該閉鎖体を製造するための装置
CN110582448B (zh) 易开闭合件
US7673490B2 (en) Method of making an easy open can end with high pressure venting
RU2811781C2 (ru) Легко открываемая торцевая крышка с увеличенной жесткостью панели
WO2020152439A1 (fr) Extrémité ouverture facile ayant une rigidité de panneau accrue
JPH0565162A (ja) イージーオープン缶蓋

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 20763025

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 20763025

Country of ref document: EP

Kind code of ref document: A1