JP4014711B2

JP4014711B2 - Can with outer lid

Info

Publication number: JP4014711B2
Application number: JP34550197A
Authority: JP
Inventors: 一郎松野; 邦彦大矢; 敬卓佐々木; 隆一内田
Original assignee: HOKKAICAN CO.,LTD.; Snow Brand Milk Products Co Ltd
Current assignee: HOKKAICAN CO.,LTD.; Snow Brand Milk Products Co Ltd
Priority date: 1997-12-15
Filing date: 1997-12-15
Publication date: 2007-11-28
Anticipated expiration: 2017-12-15
Also published as: JPH11171220A

Description

【０００１】
【発明の属する技術分野】
本発明は、外蓋付き缶体に関し、詳しくは、粉乳等を内容物として天蓋の開口後に該開口部を着脱自在な外蓋で閉塞する缶体に関する。
【０００２】
【従来の技術】
この種の外蓋付き缶体は、粉乳等の粉末食品や海苔等の湿気を嫌う食品で、分取されて用いられる食品に使用され、缶胴に巻き締められた天蓋を開口した後も外蓋を冠着することで密封保存を可能とするものである。また、この種の外蓋付き缶体においては、陳列時に外部からの悪戯を防止するために、未開封の状態と、開封後の状態とが視覚的に容易に判断できるような構造の外蓋が設けられている。詳しく説明すればこの種の外蓋は、特開平７−３１５３９８号公報に見られるように、前記天蓋を覆う覆板部と、該覆板部の周縁から下方に延長されて巻締部に着脱可能な状態で係合する第１スカート部と、該第１スカート部の下縁にスコアを介して切除自在に連設された第２スカート部とを備えて低密度ポリエチレン等の合成樹脂によって一体に形成されている。
【０００３】
前記巻締部は缶胴の外径よりも外方に突出して設けられ、第１スカート部の内周面には該巻締部に対応して係合する溝状の係止部が形成されている。また、該缶胴の外周には、溝状に凹入されたビードが形成されており、第２スカート部はその先端部の内面全周に設けられた凸条部が、該ビードの内方に収容される。該第２スカート部は、その凸条部がビードの内部に深く入り込むように形成するほど、該第２スカート部とビードとの係止が確実となるので、缶体から外蓋が取り外しにくくなり、悪戯の防止が確実となる。しかも、むりに外蓋を取り外そうとすればスコアが破断されるので、開封されたことが視覚的に判断できる。
【０００４】
しかし、第２スカート部の凸条部とビードとの係止を確実とするために、該凸条部がビードの内部に深く入り込むように第２スカート部を形成すると、巻締部の外径に対応する第１スカート部の内径よりも第２スカート部の内径が極端に小さくなり、射出成形時の型抜きが困難となるおそれがある。しかも、外蓋を缶体に冠着する際にも、巻締部の外径よりも小さな内径を有する第２スカート部が該巻締部を乗り越え難くなり、場合によってはスコアが破断されてしまうおそれがある。
【０００５】
その逆に、射出成形時の型抜きや、缶体への冠着を容易とするために、第２スカート部の内径を比較的大きくすると、第２スカート部の凸条部とビードとの強固な係止を望むことができず、悪戯により外蓋が持ち上げられて缶体から取り外されることを防止することが困難となる不都合がある。
【０００６】
このように、従来の外蓋付き缶体においては、外蓋の型抜きや缶体への冠着といった製造を容易とすることと、確実に悪戯を防止することとの両立が困難であった。
【０００７】
また、上記公報に開示された外蓋付き缶体では、第２スカート部を取り除いた後に、缶胴全周に亘ってビードが露出し、缶胴の美観を損ねる不都合があった。
【０００８】
【発明が解決しようとする課題】
かかる不都合を解消して、本発明は、製造容易であって、しかも確実に悪戯を防止することでき、更に、スカート部切除後に缶胴の美観を損ねることを防止することができる外蓋付き缶体を提供することを目的とする。
【０００９】
【課題を解決するための手段】
かかる目的を達成するために、本発明は、金属製の筒状の缶胴と、該缶胴の上端部を縮径して形成されたネックイン部と、該ネックイン部の上縁に巻締部を介して巻締められた天蓋と、缶胴の上端部に冠着して該天蓋を覆う合成樹脂製の外蓋とを備えてなり、該外蓋は、前記天蓋の上面を覆う覆板部と、該覆板部の周縁から缶胴の外周に沿って下方に延出するスカート部とを備える外蓋付き缶体において、前記スカート部は、前記巻締部の外周に係脱自在な係止部を内周面に備える第１スカート部と、該第１スカート部の下縁にスコアを介して切り離し自在に連設された第２スカート部とを備え、前記缶胴は、前記ネックイン部の下端に連続して下方に向かって次第に拡径して前記巻締部より外径が大とされ且つ前記第２スカート部の内周面を外周に密着させて摩擦係合させるテーパー部を備え、前記第２スカート部は、その上端側から下端に向かって次第に肉薄となるように形成されており、前記缶胴への非冠着状態ではその内径が少なくとも前記巻締部の外径より大であり且つ前記テーパー部の外径より小とされ、該缶胴に冠着された際に前記テーパー部に沿って弾発的に拡径されることを特徴とする。
【００１０】
本発明によれば、前記外蓋は、第１スカート部の係止部によって缶胴の巻締部に係止され、第２スカート部の内周面がテーパー部の外周面に密着して摩擦係合された状態で未開封とされている。外蓋が未開封の状態にあるとき、前記テーパー部は巻締部より外径が大であり、第２スカート部の内径はテーパー部の外径より小であるので、第２スカート部は、テーパー部に沿って弾発的に押し広げられて強固に密着し、缶胴と第２スカート部との間には人の指等が入り込めない状態とされる。しかも、該第２スカート部の下端側が比較的肉薄に形成されているので、該第２スカート部の下端側に指等が掛かりにくい状態とされる。従って、悪戯等による外蓋の取り外しを確実に防止することができる。更に、むりに外蓋を取り外そうとすれば、第２スカート部が変形してスコアが破断され、悪戯された缶体であることを視覚的に容易に判断することができる。
【００１１】
該外蓋を缶胴から取り外して開封する場合には、前記スコアを切断して第１スカート部から第２スカート部を切り離す。これにより、缶胴の外周面に密着していた第２スカート部が取り除かれ、開封後の外蓋の着脱は、巻締部と第１スカート部の係止部との係脱によって行える状態となる。更に、第２スカート部が切除された部分の缶胴には、比較的平坦なテーパー部が露出するだけであるので、従来のような缶胴に深く凹入されたビードが露出する場合に比べて、缶胴の美観が損なわれることがなく、使用者に不快感を与えることを防止することができる。
【００１２】
また、本発明における外蓋は、合成樹脂を材料とするものであるので、射出成形によって形成される。第２スカート部の内径は前記巻締部の外径より大とされているので、前記巻締部の外径に対応する第１スカート部の内径よりも大きい。従って、射出成形時の型抜きにおいては、該外蓋は、型抜き方向に従ってその内径が拡がっているので、容易に型抜きを行うことができる。
【００１３】
更に、缶体の製造時に外蓋を冠着する際には、前記第１スカート部の係止部が巻締部に係合するに先立って、第２スカート部が巻締部を通過する。このとき、第２スカート部は、前記缶胴への非冠着状態ではその内径が前記巻締部の外径より大であるので、巻締部によって通過が阻止されることがなく円滑に冠着することができる。また、第２スカート部は、前記缶胴への非冠着状態ではその内径が前記テーパー部の外径より小とされているので、缶胴に冠着された際に前記テーパー部に沿って弾発的に拡径される。外蓋は合成樹脂によって形成されているので比較的柔軟性を有しており、第２スカート部がテーパー部に沿って円滑に押し広げられる。そして、これによって、第２スカート部は前記テーパー部に沿って引き延ばされた状態で強固に摩擦係合される。
【００１４】
このように、本発明によれば、外蓋の射出成形時の型抜きや、外蓋を冠着する作業を極めて容易に行うことができ、しかも、悪戯等による外蓋の取り外しを確実に防止することができる。
【００１５】
本発明においては、前記缶胴に、前記第２スカート部の下縁に沿って外方に突出する凸部を設けることが好ましい。これによって、第２スカート部の下縁には指等が掛かりようもなく、悪戯等による外蓋の取り外しを一層確実に防止することができる。
【００１６】
【発明の実施の形態】
本発明の一実施形態を図面に基づいて説明する。図１は本実施形態の外蓋付き缶体を示す説明的斜視図、図２は要部を縦断面視して示す説明図である。
【００１７】
図１及び図２に示すように、本実施形態の缶体１は、円筒状の金属製缶胴２の上部に天蓋３（図２にのみ示す）が巻き締められ、下部に底蓋４（図１にのみ示す）が巻き締められて、その内部に収容された粉乳が密封されている。更に、天蓋３は、合成樹脂である低密度ポリエチレン製の外蓋５によって被覆状態とされており、該外蓋５を取り外して開封することにより天蓋３を開口することができ、天蓋３が開口された後に該外蓋５を冠着して、内部の粉乳を密封状態で保存することができるようになっている。なお、天蓋３は、図２に示すように、缶胴２の上縁全周に巻き締め固定された中央に開口を有する枠体３ａと、該枠体３ａに剥離自在に設けられた開口を密封する密封シート３ｂとによって構成されており、密封シート３ｂを枠体３ａから剥離することによって天蓋３が開口される。密封シート３ｂは密封性が優れているものの、比較的薄手であって外部からの接触や悪戯等によって破れや孔あきが生じ易い。そこで、前記外蓋５を設けて未開封の状態にある密封シート３ｂを保護している。
【００１８】
該缶胴２は、図２に示すように、その上縁部６がその下側の胴部７よりも縮径されて形成されている。該上縁全周には、天蓋３を巻き締めることによって巻締部８が形成されている。
【００１９】
該缶胴２の上縁部６は、段階的に縮径成形して得られるネックイン部９により胴部７よりも縮径されている。巻締部８は、該ネックイン部９を介して外方に突出されて上縁部６に形成されている。なお、巻締部８の外径は、ネックイン部９の下端９ａの外径よりも小さく形成されている。
【００２０】
該ネックイン部９に隣設してその下方には、下方に向かって次第に拡径するテーパー部１０が該缶胴２の全周に形成されている。テーパー部１０はネックイン部９の下端９ａに連続して形成されており、更に、テーパー部１０の下端１０ａに連続してその下方位置には、該缶胴２の外方に突出する凸部１１が該缶胴２の全周に形成されている。また、前記ネックイン部９の下端９ａの外径は胴部７の外径と略同径であり、テーパー部１０の下端１０ａの外径は胴部７の外径よりも大きい。前記外蓋５は、図２に示すように、天蓋３を覆って円盤状に形成された覆板部１２と、該覆板部１２の周縁から下方に向かって延設されたスカート部１３とによって構成されている。
【００２１】
該スカート部１３は、巻締部８に沿って下方に延設された第１スカート部１４と、該第１スカート部１４の下縁にスコア１５を介して一体に連設された第２スカート部１６とを備えている。
【００２２】
前記第１スカート部１４は、その内周に前記巻締部８に対応して形成された溝状の係止部１７を備えている。該係止部１７は、巻締部８の下縁に係止する凸条部１８と該凸条部１８から下方に向かって次第に拡径方向に傾斜する傾斜部１９とを備えている。該係止部１７の凸条部１８は傾斜部１９に案内されて巻締部８を乗り越えて巻締部８の下縁に係止される。
【００２３】
前記第２スカート部１６は、前記スコア１５の隣接位置では肉厚が比較的大であり、前記テーパー部１０に接触するあたりから下方に向かって次第に肉薄になるように形成されている。該第２スカート部１６の最も肉厚の大とされた部分の内径は、前記巻締部８の外径より僅かに大とされている。また、図示しないが、第２スカート部１６は射出成形によって形成され、第１スカート部１４と第２スカート部１６との境界のスコア１５が形成された狭い範囲を除けば、第２スカート部１６の内径が第１スカート部１４の内径より大きく成形されることによって、型抜き方向に沿って内径が拡がっているので、型抜きを円滑に行うことができる。
【００２４】
更に、第２スカート部１６は、缶胴２に未冠着の際にその下端部の内径が、前記テーパー部１０の上端の外径に略一致する寸法に形成される。該第２スカート部１６の下端部は極めて肉薄に形成されており、該第２スカート部１６の内面の略前面がテーパー部１０の外面に密着する。更に、第２スカート部１６の下縁は、前記缶胴２に形成された凸部１１によって囲われている。
【００２５】
また、図１に示すように、第２スカート部１６の一部にスコア１５に沿って切り取る際に初期切断するための指掛け用切欠部２０が形成されており、該切欠部２０の下縁部には指掛けを容易とする指掛け凸部２１が形成されている。前記スコア１５は、図２に示すように、第１スカート部１４と第２スカート部１６との境界に沿って全周に設けられている。更に、前記指掛け用切欠部２０の引っかけ方向に沿ってスコア１５の破断を開始するための破断開始用スコア２２が形成されている。
【００２６】
以上の構成による外蓋５を、製造時に缶体１に冠着するとき、図２を参照して説明すれば、まず、前記第２スカート部１６が巻締部８を通過する。該第２スカート部１６の内径は、巻締部８の外径より大きく形成されているので、巻締部８を円滑に通過させることができ、第２スカート部１６がスコア１５の破断により切離されるのを確実に防止することができる。
【００２７】
次いで、前記第２スカート部１６がテーパー部１０に沿って弾発的に拡径されるが、テーパー部１０による比較的緩やかな案内によって、冠着作業時の抵抗を極めて小とすることができる。一方、前記第１スカート部１４の係止部１７の凸条部１８が巻締部８を乗り越えて、巻締部８の下縁に係止され、外蓋５の缶体１への冠着が完了する。
【００２８】
また、外蓋５が冠着されて未開封状態の缶体１においては、悪戯等の手段として第２スカート部１６の下縁に指を掛けようとしても、前記凸部１１によって阻止されるので、確実に悪戯を防止することができる。また、図示しないが、前記凸部１１が設けられていない場合であっても、第２スカート部１６は、テーパー部１０に沿って弾発的に押し広げられて強固に密着し、しかも、第２スカート部１６の下端側が比較的肉薄に形成されているので、第２スカート部１６への指掛けや、第２スカート部１６と缶胴２との間への指の侵入を確実に防止することができる。
【００２９】
そして、外蓋５を缶胴２から取り外して天蓋３を開封する場合には、前記スコア１５を切断して第２スカート部１６を切り離す。これにより、図示しないが、第２スカート部１６が取り除かれた外蓋５の着脱は、巻締部８と第１スカート部１４の係止部１７との係脱によって行える状態となる。このとき、第２スカート部１６が切除された部分の缶胴２には、比較的平坦なテーパー部１０の外面が露出するだけであるので、従来のような缶胴に深く凹入されたビードが露出する場合に比べて、缶胴の美観が損なわれることを防止することができる。
【００３０】
また、前記テーパー部１０は、前述したように、胴部７より大きな外径となるように形成することによって、第２スカート部１６との密着状態を強固とすることができるだけでなく、例えば、図示しないが、前記ネックイン部９を形成する際に、前記テーパー部１０を設けることによって、ネックイン部９の下端９ａの曲げ角度を比較的緩やかに形成することができ、ネックイン部９の形成時に急激な曲げ変形による皺等の発生を確実に防止することができるといった効果も得ることができる。
【００３１】
【発明の効果】
以上のことから明らかなように、本発明によれば、外蓋が未開封の状態にあるとき、前記テーパー部は巻締部より外径が大であり、第２スカート部の内径はテーパー部の外径より小であるので、第２スカート部は、テーパー部に沿って弾発的に押し広げられて強固に密着し、缶胴と第２スカート部との間に、人の指等が入り込めない状態とすることができ、しかも、該第２スカート部の下端側が比較的肉薄に形成されているので、該第２スカート部の下端側に指等が掛かりにくい状態とすることができる。従って、悪戯等による外蓋の取り外しを確実に防止することができる。更に、むりに外蓋を取り外そうとすれば、第２スカート部が変形してスコアが破断され、悪戯された缶体であることを視覚的に容易に判断することができる。
【００３２】
また、外蓋を缶胴から取り外して開封した後には、第２スカート部が切除された部分の缶胴には、比較的平坦なテーパー部が露出するだけであるので、従来のような缶胴に深く凹入されたビードが露出する場合に比べて、缶胴の美観が損なわれることがなく、使用者に不快感を与えることを防止することができる。
【００３３】
また、射出成形時の型抜きにおいては、該外蓋は、型抜き方向に従ってその内径が拡がっているので、容易に型抜きを行うことができる。更に、缶体の製造時に外蓋を冠着する際には、前記第１スカート部の係止部が巻締部に係合するに先立って、第２スカート部が巻締部を容易に通過するので、円滑に冠着することができる。
【００３４】
更に、本発明によれば、前記缶胴に、前記第２スカート部の下縁に沿って外方に突出する凸部を設けたので、第２スカート部の下縁には指等が掛かりようもなく、悪戯等による外蓋の取り外しを一層確実に防止することができる。
【００３５】
このように、本発明によれば、外蓋の射出成形時の型抜きや、外蓋を冠着する作業を極めて容易に行うことができ、しかも、悪戯等による外蓋の取り外しを確実に防止することができる。
【図面の簡単な説明】
【図１】本発明の一実施形態の外蓋付き缶体を示す説明的斜視図。
【図２】本発明の一実施形態の要部を縦断面視して示す説明図。
【符号の説明】
１…外蓋付き缶体、２…缶胴、３…天蓋、５…外蓋、８…巻締部、９…ネックイン部、１０…テーパー部、１１…凸部、１２…覆板部、１３…スカート部、１４…第１スカート部、１５…スコア、１６…第２スカート部、１７…係止部。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a can body with an outer lid, and more particularly to a can body having powdered milk or the like as a content and closing the opening with a removable outer lid after the canopy is opened.
[0002]
[Prior art]
This type of can with an outer lid is a powdered food such as milk powder or a food that dislikes moisture such as seaweed and is used for food that is separated and used, and it remains outside after opening the canopy wrapped around the can body. Sealed storage is possible by attaching a lid. Further, in this type of can with an outer lid, in order to prevent mischief from the outside at the time of display, the outer lid has such a structure that an unopened state and a state after opening can be easily determined visually. Is provided. More specifically, this type of outer lid, as seen in Japanese Patent Application Laid-Open No. 7-315398, extends downward from the periphery of the cover plate and is attached to and detached from the tightening portion. A first skirt portion that engages in a possible state and a second skirt portion that is removably connected to the lower edge of the first skirt portion through a score, and is integrated with a synthetic resin such as low-density polyethylene Is formed.
[0003]
The winding tightening portion is provided so as to protrude outward from the outer diameter of the can body, and a groove-shaped locking portion that engages with the winding tightening portion is formed on the inner peripheral surface of the first skirt portion. ing. Further, a bead that is recessed in a groove shape is formed on the outer periphery of the can body, and the second skirt portion has a ridge provided on the entire inner surface of the tip end portion, and the inner side of the bead. Is housed. As the second skirt portion is formed so that the protruding portion deeply enters the inside of the bead, the engagement between the second skirt portion and the bead becomes more reliable, and the outer lid is less likely to be removed from the can body. The prevention of mischief is sure. In addition, if the outer lid is removed, the score is broken, so that it can be visually determined that it has been opened.
[0004]
However, if the second skirt portion is formed so that the protruding portion deeply enters the inside of the bead in order to ensure the locking between the protruding portion of the second skirt portion and the bead, the outer diameter of the winding tightening portion The inner diameter of the second skirt portion becomes extremely smaller than the inner diameter of the first skirt portion corresponding to the above, and there is a possibility that it is difficult to perform die cutting during injection molding. Moreover, when the outer lid is attached to the can body, the second skirt portion having an inner diameter smaller than the outer diameter of the tightening portion is difficult to get over the tightening portion, and the score may be broken in some cases. There is a fear.
[0005]
On the contrary, if the inner diameter of the second skirt portion is made relatively large in order to facilitate die cutting during injection molding and crowning on the can body, the ridges of the second skirt portion and the beads are firmly There is an inconvenience that it is difficult to prevent the outer lid from being lifted and removed from the can by mischief.
[0006]
As described above, in the conventional can body with an outer lid, it has been difficult to achieve both the ease of manufacturing such as die-cutting of the outer lid and the attachment to the can body and the prevention of mischief surely. .
[0007]
Further, in the can body with an outer lid disclosed in the above publication, after removing the second skirt portion, the bead is exposed over the entire circumference of the can body, and there is a problem in that the beauty of the can body is impaired.
[0008]
[Problems to be solved by the invention]
The present invention eliminates such inconvenience, and the present invention is easy to manufacture, can reliably prevent mischief, and can further prevent the appearance of the can body from being damaged after the skirt is cut off. The purpose is to provide a body.
[0009]
[Means for Solving the Problems]
To achieve this object, the present invention provides a metal cylindrical can body, a neck-in portion formed by reducing the diameter of the upper end portion of the can body, and a winding around the upper edge of the neck-in portion. A canopy wound through a fastening portion, and a synthetic resin outer lid that is attached to the upper end of the can body and covers the canopy, and the outer lid covers the upper surface of the canopy. In a can body with an outer lid comprising a plate portion and a skirt portion extending downwardly from the periphery of the cover plate portion along the outer periphery of the can body, the skirt portion is freely detachable from the outer periphery of the tightening portion. A first skirt portion provided with a locking portion on the inner peripheral surface, and a second skirt portion continuously connected to the lower edge of the first skirt portion through a score, the can body including the The inner diameter of the second skirt portion is such that the diameter of the second skirt portion is increased gradually toward the bottom continuously from the lower end of the neck-in portion and the outer diameter is larger than that of the winding portion. Comprises a tapered portion frictionally engaged in close contact to the outer periphery, said second skirt, its is formed so as gradually becomes thinner toward the lower end from the top side, the non-crown deposition states to the can body The inner diameter is at least larger than the outer diameter of the tightening portion and smaller than the outer diameter of the tapered portion, and is elastically expanded along the tapered portion when the crown is attached to the can body. It is characterized by that.
[0010]
According to the present invention, the outer lid is locked to the winding portion of the can body by the locking portion of the first skirt portion, and the inner peripheral surface of the second skirt portion is in close contact with the outer peripheral surface of the tapered portion to cause friction. It is unopened in the engaged state. When the outer lid is in an unopened state, the tapered portion has an outer diameter larger than that of the tightening portion, and the inner diameter of the second skirt portion is smaller than the outer diameter of the tapered portion. It is pushed out elastically along the taper part and firmly adheres, so that a human finger or the like cannot enter between the can body and the second skirt part. And since the lower end side of this 2nd skirt part is formed comparatively thinly, it will be in the state which a finger | toe etc. are hard to catch on the lower end side of this 2nd skirt part. Therefore, it is possible to reliably prevent the outer lid from being removed due to mischief or the like. Furthermore, if the outer lid is to be removed, the second skirt portion is deformed, the score is broken, and it can be easily determined visually that the can body is mischievous.
[0011]
When the outer lid is removed from the can body and opened, the score is cut and the second skirt portion is separated from the first skirt portion. As a result, the second skirt portion that is in close contact with the outer peripheral surface of the can body is removed, and the outer lid after opening can be attached and detached by engaging and disengaging the winding portion and the locking portion of the first skirt portion. Become. Furthermore, since the relatively flat tapered portion is only exposed in the can body where the second skirt portion is cut, compared to the case where the bead deeply recessed in the conventional can body is exposed. Thus, the aesthetic appearance of the can body is not impaired and it is possible to prevent the user from feeling uncomfortable.
[0012]
Moreover, since the outer cover in this invention uses a synthetic resin as a material, it is formed by injection molding. Since the inner diameter of the second skirt portion is larger than the outer diameter of the winding fastening portion, it is larger than the inner diameter of the first skirt portion corresponding to the outer diameter of the winding fastening portion. Therefore, in the die cutting at the time of injection molding, since the inner diameter of the outer lid expands in accordance with the die cutting direction, it is possible to easily perform the die cutting.
[0013]
Further, when the outer lid is crowned at the time of manufacturing the can body, the second skirt portion passes through the winding fastening portion before the locking portion of the first skirt portion is engaged with the winding fastening portion. At this time, since the inner diameter of the second skirt portion is larger than the outer diameter of the winding tightening portion when not attached to the can body, the second skirt portion can be smoothly crowned without being blocked by the winding tightening portion. Can be worn. In addition, since the inner diameter of the second skirt portion is smaller than the outer diameter of the tapered portion in the non-crowned state on the can body, the second skirt portion extends along the tapered portion when the second skirt portion is attached to the can body. The diameter is expanded explosively. Since the outer lid is made of synthetic resin, it has relatively flexibility, and the second skirt portion is smoothly spread along the tapered portion. As a result, the second skirt portion is firmly frictionally engaged with the second skirt portion while being stretched along the tapered portion.
[0014]
As described above, according to the present invention, it is possible to very easily perform die cutting during the injection molding of the outer lid and the operation of attaching the outer lid, and reliably prevent the outer lid from being removed due to mischief or the like. can do.
[0015]
In the present invention, it is preferable that the can body is provided with a convex portion protruding outward along the lower edge of the second skirt portion. As a result, it is possible to prevent the outer lid from being removed due to mischief or the like without any finger or the like hanging on the lower edge of the second skirt portion.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an explanatory perspective view showing a can body with an outer lid of the present embodiment, and FIG. 2 is an explanatory view showing a main part in a longitudinal sectional view.
[0017]
As shown in FIGS. 1 and 2, the can body 1 of the present embodiment has a canopy 3 (shown only in FIG. 2) wound around an upper portion of a cylindrical metal can body 2, and a bottom lid 4 ( 1 is shown) and the milk powder contained therein is sealed. Further, the canopy 3 is covered with an outer lid 5 made of low density polyethylene, which is a synthetic resin, and the canopy 3 can be opened by removing the outer lid 5 and opening the canopy 3. After that, the outer lid 5 is attached to the inside so that the inside milk powder can be stored in a sealed state. As shown in FIG. 2, the canopy 3 includes a frame body 3a having an opening at the center and fastened around the entire upper edge of the can body 2, and an opening provided in the frame body 3a in a detachable manner. The sealing sheet 3b is sealed, and the canopy 3 is opened by peeling the sealing sheet 3b from the frame 3a. Although the sealing sheet 3b is excellent in sealing performance, it is relatively thin and is easily broken or perforated due to external contact or mischief. Therefore, the outer lid 5 is provided to protect the sealing sheet 3b in an unopened state.
[0018]
As shown in FIG. 2, the can body 2 is formed such that the upper edge portion 6 has a diameter smaller than that of the lower body portion 7. A winding portion 8 is formed around the upper edge by winding the canopy 3.
[0019]
The upper edge portion 6 of the can body 2 has a diameter smaller than that of the body portion 7 by a neck-in portion 9 obtained by reducing the diameter in stages. The winding portion 8 protrudes outward through the neck-in portion 9 and is formed on the upper edge portion 6. Note that the outer diameter of the tightening portion 8 is smaller than the outer diameter of the lower end 9 a of the neck-in portion 9.
[0020]
A tapered portion 10 that is provided adjacent to the neck-in portion 9 and that gradually increases in diameter downward is formed on the entire periphery of the can body 2. The tapered portion 10 is formed continuously with the lower end 9 a of the neck-in portion 9, and further, a convex portion protruding outward of the can body 2 at a position below the lower end 10 a of the tapered portion 10. 11 is formed on the entire circumference of the can body 2. The outer diameter of the lower end 9 a of the neck-in portion 9 is substantially the same as the outer diameter of the barrel portion 7, and the outer diameter of the lower end 10 a of the tapered portion 10 is larger than the outer diameter of the barrel portion 7. As shown in FIG. 2, the outer lid 5 includes a cover plate portion 12 that is formed in a disc shape so as to cover the canopy 3, and a skirt portion 13 that extends downward from the periphery of the cover plate portion 12. It is constituted by.
[0021]
The skirt portion 13 includes a first skirt portion 14 extending downward along the winding tightening portion 8, and a second skirt integrally connected to the lower edge of the first skirt portion 14 via a score 15. Part 16.
[0022]
The first skirt portion 14 includes a groove-like locking portion 17 formed on the inner periphery corresponding to the winding fastening portion 8. The locking portion 17 includes a protruding ridge portion 18 that engages with the lower edge of the winding fastening portion 8 and an inclined portion 19 that gradually inclines from the protruding ridge portion 18 downward in the diameter increasing direction. The protruding portion 18 of the locking portion 17 is guided by the inclined portion 19, gets over the winding portion 8, and is locked to the lower edge of the winding portion 8.
[0023]
The second skirt portion 16 has a relatively large thickness at a position adjacent to the score 15 and is formed so as to gradually become thinner from the point of contact with the tapered portion 10. The inner diameter of the thickest portion of the second skirt portion 16 is slightly larger than the outer diameter of the winding fastening portion 8. Although not shown, the second skirt portion 16 is formed by injection molding, and the second skirt portion 16 is formed except for a narrow range where the boundary score 15 between the first skirt portion 14 and the second skirt portion 16 is formed. Since the inner diameter of the first skirt portion 14 is formed to be larger than the inner diameter of the first skirt portion 14, the inner diameter is increased along the die-cutting direction, so that the die-cutting can be performed smoothly.
[0024]
Further, the second skirt portion 16 is formed to have a size such that the inner diameter of the lower end portion of the second skirt portion 16 substantially coincides with the outer diameter of the upper end of the tapered portion 10 when not attached to the can body 2. The lower end portion of the second skirt portion 16 is formed extremely thin, and the substantially front surface of the inner surface of the second skirt portion 16 is in close contact with the outer surface of the tapered portion 10. Further, the lower edge of the second skirt portion 16 is surrounded by the convex portion 11 formed on the can body 2.
[0025]
Further, as shown in FIG. 1, a finger-hanging cutout 20 is formed in a part of the second skirt portion 16 for initial cutting when cutting along the score 15, and a lower edge portion of the cutout 20 Is formed with a finger-hanging convex portion 21 for facilitating finger-hanging. As shown in FIG. 2, the score 15 is provided on the entire circumference along the boundary between the first skirt portion 14 and the second skirt portion 16. Further, a breaking start score 22 for starting breaking of the score 15 is formed along the hooking direction of the finger hanging notch 20.
[0026]
When the outer lid 5 having the above configuration is attached to the can 1 at the time of manufacture, the second skirt portion 16 first passes through the winding portion 8 as described with reference to FIG. Since the inner diameter of the second skirt portion 16 is larger than the outer diameter of the tightening portion 8, the second tightening portion 8 can be smoothly passed, and the second skirt portion 16 is cut by breaking the score 15. It can be surely prevented from being separated.
[0027]
Next, the diameter of the second skirt portion 16 is expanded elastically along the tapered portion 10, but the resistance during the crowning operation can be made extremely small by the relatively gentle guidance by the tapered portion 10. . On the other hand, the protrusion 18 of the locking part 17 of the first skirt part 14 gets over the winding part 8 and is locked to the lower edge of the winding part 8, and the outer lid 5 is attached to the can 1. Is completed.
[0028]
Further, in the unopened can body 1 with the outer lid 5 attached, even if an attempt is made to put a finger on the lower edge of the second skirt portion 16 as a means of mischief or the like, the convex portion 11 prevents it. , Can certainly prevent mischief. Although not shown, even when the convex portion 11 is not provided, the second skirt portion 16 is elastically pushed along the tapered portion 10 to be firmly adhered, 2 Since the lower end side of the skirt portion 16 is formed to be relatively thin, it is possible to reliably prevent finger hooking on the second skirt portion 16 and intrusion of fingers between the second skirt portion 16 and the can body 2. Can do.
[0029]
When the outer lid 5 is removed from the can body 2 and the canopy 3 is opened, the score 15 is cut and the second skirt portion 16 is cut off. Thus, although not shown, the outer lid 5 from which the second skirt portion 16 has been removed can be attached and detached by engaging and disengaging the winding portion 8 and the locking portion 17 of the first skirt portion 14. At this time, since the outer surface of the relatively flat tapered portion 10 is only exposed at the portion of the can body 2 from which the second skirt portion 16 has been removed, a bead that is deeply recessed into the conventional can body It is possible to prevent the beauty of the can body from being deteriorated as compared with the case where is exposed.
[0030]
Further, as described above, by forming the tapered portion 10 so as to have an outer diameter larger than that of the trunk portion 7, not only can the adhesive state with the second skirt portion 16 be strengthened, Although not shown, when the neck-in portion 9 is formed, by providing the tapered portion 10, the bending angle of the lower end 9 a of the neck-in portion 9 can be formed relatively gently. The effect that the generation | occurrence | production of the wrinkles etc. by rapid bending deformation at the time of formation can be prevented reliably can also be acquired.
[0031]
【The invention's effect】
As is clear from the above, according to the present invention, when the outer lid is in an unopened state, the tapered portion has an outer diameter larger than that of the winding portion, and the inner diameter of the second skirt portion is the tapered portion. Since the outer diameter of the second skirt portion is smaller than the outer diameter of the first skirt portion, the second skirt portion is elastically pushed and spreads along the taper portion, so that a human finger or the like is placed between the can body and the second skirt portion. In addition, since the lower end side of the second skirt portion is formed relatively thin, it is possible to make it difficult for a finger or the like to be caught on the lower end side of the second skirt portion. . Therefore, it is possible to reliably prevent the outer lid from being removed due to mischief or the like. Furthermore, if the outer lid is to be removed, the second skirt portion is deformed, the score is broken, and it can be easily determined visually that the can body is mischievous.
[0032]
Further, after the outer lid is removed from the can body and opened, only a relatively flat tapered portion is exposed at the portion of the can body where the second skirt portion is cut off. Compared to the case where the bead deeply recessed is exposed, the aesthetic appearance of the can body is not impaired, and it is possible to prevent the user from feeling uncomfortable.
[0033]
Moreover, in the die cutting at the time of injection molding, since the inner diameter of the outer lid increases in accordance with the die cutting direction, it is possible to easily perform the die cutting. Further, when the outer lid is attached during the manufacture of the can body, the second skirt portion easily passes through the winding fastening portion before the locking portion of the first skirt portion engages the winding fastening portion. So you can wear it smoothly.
[0034]
Furthermore, according to the present invention, since the can body is provided with a convex portion that protrudes outward along the lower edge of the second skirt portion, a finger or the like may be hung on the lower edge of the second skirt portion. In addition, it is possible to more reliably prevent the outer lid from being removed due to mischief or the like.
[0035]
As described above, according to the present invention, it is possible to very easily perform die cutting during the injection molding of the outer lid and the operation of attaching the outer lid, and reliably prevent the outer lid from being removed due to mischief or the like. can do.
[Brief description of the drawings]
FIG. 1 is an explanatory perspective view showing a can body with an outer lid according to an embodiment of the present invention.
FIG. 2 is an explanatory view showing a main part of one embodiment of the present invention in a longitudinal section.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Can body with outer lid, 2 ... Can trunk, 3 ... Canopy, 5 ... Outer lid, 8 ... Winding part, 9 ... Neck-in part, 10 ... Taper part, 11 ... Convex part, 12 ... Cover plate part, 13 ... Skirt part, 14 ... First skirt part, 15 ... Score, 16 ... Second skirt part, 17 ... Locking part.

Claims

A metal cylindrical can body, a neck-in part formed by reducing the diameter of the upper end of the can body, a canopy wound on the upper edge of the neck-in part via a tightening part, A synthetic resin outer lid that is attached to the upper end of the can body and covers the canopy, the outer lid covering the upper surface of the canopy, and a can from the periphery of the covering plate In a can body with an outer lid provided with a skirt portion extending downward along the outer periphery of the trunk,
The skirt portion is connected to a first skirt portion having an engaging portion detachably attached to an outer periphery of the tightening portion on an inner peripheral surface, and a lower edge of the first skirt portion so as to be separable through a score. A second skirt portion,
The can body has a diameter that is gradually expanded downward continuously from the lower end of the neck-in portion so that the outer diameter is larger than that of the tightening portion, and the inner peripheral surface of the second skirt portion is closely attached to the outer periphery. With a tapered portion for frictional engagement,
Said second skirt, its is formed so as gradually becomes thinner toward the lower end from the top side, the non-crown deposition states to the can body at a larger than the outer diameter of the inner diameter of at least the seamed portion A can body with an outer lid, wherein the can body is smaller than an outer diameter of the tapered portion, and is elastically expanded along the tapered portion when being attached to the can body.

The can body with an outer lid according to claim 1, wherein the can body is provided with a convex portion projecting outward along a lower edge of the second skirt portion.