JPH09328158A - Metallic cap - Google Patents
Metallic capInfo
- Publication number
- JPH09328158A JPH09328158A JP8144643A JP14464396A JPH09328158A JP H09328158 A JPH09328158 A JP H09328158A JP 8144643 A JP8144643 A JP 8144643A JP 14464396 A JP14464396 A JP 14464396A JP H09328158 A JPH09328158 A JP H09328158A
- Authority
- JP
- Japan
- Prior art keywords
- liner
- top plate
- cap
- container
- cap body
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
Links
Classifications
-
- 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
- B65D41/00—Caps, e.g. crown caps or crown seals, i.e. members having parts arranged for engagement with the external periphery of a neck or wall defining a pouring opening or discharge aperture; Protective cap-like covers for closure members, e.g. decorative covers of metal foil or paper
- B65D41/32—Caps or cap-like covers with lines of weakness, tearing-strips, tags, or like opening or removal devices, e.g. to facilitate formation of pouring openings
- B65D41/34—Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt
- B65D41/348—Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt the tamper element being rolled or pressed to conform to the shape of the container, e.g. metallic closures
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、容器の口部に装着
されて容器口部を閉止する金属製キャップに関し、特に
容器の内圧が高まった時に容器内の気体を外部に放出す
る機能を有する金属製キャップに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metal cap that is attached to the mouth of a container to close the mouth of the container, and particularly has a function of releasing the gas in the container to the outside when the internal pressure of the container increases. Regarding metal caps.
【０００２】[0002]
【従来の技術】この種の金属製キャップとして、実開昭
６４−５１０５３号公報に記載のキャップが提案されて
いる。図５は同公報に記載されたキャップを示すもので
あり、このキャップは、円形の天板部１とその周縁から
垂下した筒部２とからなる金属製のキャップ本体３と、
該キャップ本体３の天板部１内面に設けられた板状の合
成樹脂製のライナー４とを備えて構成されている。さら
に、このキャップでは、ライナー４の周縁部に、該キャ
ップ本体３を装着するべき容器口部５の上端面６の外径
と略等しい位置まで達する少なくとも１個の切欠部７が
設けられている。このキャップは、容器口部５に被せて
筒部２を容器口部５の雄ネジに合わせて塑性変形させる
ことによって容器口部５に装着される。このキャップ
は、容器の内圧が異常に上昇した場合に、容器内部のガ
スをライナー４の切欠部７から外部に放出できるように
構成されている。2. Description of the Related Art As this type of metal cap, a cap described in Japanese Utility Model Laid-Open No. 64-51053 has been proposed. FIG. 5 shows a cap described in the publication, which is a cap body 3 made of a metal, which is composed of a circular top plate portion 1 and a cylindrical portion 2 hanging down from a peripheral edge thereof.
The cap main body 3 is provided with a plate-shaped synthetic resin liner 4 provided on the inner surface of the top plate portion 1. Furthermore, in this cap, at least one notch 7 is provided on the peripheral edge of the liner 4 to reach a position approximately equal to the outer diameter of the upper end surface 6 of the container mouth 5 to which the cap body 3 is to be mounted. . This cap is mounted on the container mouth 5 by covering the container mouth 5 and plastically deforming the tubular portion 2 in accordance with the male screw of the container mouth 5. The cap is configured so that the gas inside the container can be discharged to the outside from the cutout portion 7 of the liner 4 when the internal pressure of the container rises abnormally.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、上記従
来品にあっては、容器の内圧が異常に上昇した場合に容
器内部のガスを確実に放出することが難しかった。すな
わち、切欠部７の先端（径方向内方端）を径方向内方側
に延して切欠部７を深くすると、ガスの抜けは良くなる
ものの、密封性が悪化し易くなり、容器内が減圧状態と
なった場合に切欠部７から空気が吸い込まれて減圧状態
を維持できなかったり、液漏れを生じ易い問題が生じ
る。一方、切欠部７が浅いと、密封性は良くなるもの
の、容器内圧が異常に上昇しても切欠部７から容器内の
ガスを確実に放出できないという不具合があった。した
がって、従来品においては、容器内部の減圧状態を維持
することができる十分な密封性と、容器内圧が異常に上
昇した場合にガスを放出する機能の両方を兼ね備えたキ
ャップを提供することが困難であった。However, in the above-mentioned conventional products, it is difficult to reliably release the gas inside the container when the internal pressure of the container rises abnormally. That is, when the tip (radially inward end) of the cutout portion 7 is extended radially inwardly to make the cutout portion 7 deeper, the gas escapes better, but the hermeticity tends to deteriorate, and When the pressure is reduced, air is sucked from the cutout portion 7 and the reduced pressure cannot be maintained, or liquid leakage easily occurs. On the other hand, if the notch 7 is shallow, the sealing performance is improved, but there is a problem that the gas in the container cannot be reliably released from the notch 7 even if the container internal pressure rises abnormally. Therefore, in the conventional product, it is difficult to provide a cap having both a sufficient sealing property capable of maintaining a depressurized state inside the container and a function of releasing gas when the internal pressure of the container abnormally rises. Met.
【０００４】本発明は上記事情に鑑みてなされたもの
で、容器内部の減圧状態を維持することができる十分な
密封性と、容器内圧が異常に上昇した場合にガスを放出
する機能の両方を兼ね備えるキャップの提供を課題とし
ている。The present invention has been made in view of the above circumstances, and has both a sufficient sealing property capable of maintaining a depressurized state inside the container and a function of releasing gas when the internal pressure of the container abnormally rises. The challenge is to provide a combined cap.
【０００５】[0005]
【課題を解決するための手段】本発明者は上記課題を解
決するために鋭意研究を重ねた結果、従来品はライナー
の天板部側の面を全て天板部内面に接着固定していたた
めに、その接着部分の機械強度が高められ、このキャッ
プを装着した容器内圧が異常に高くなった場合でもキャ
ップの天板部が上方に膨出し難いために、切欠部による
ガス放出機能が十分発揮されず、上述した不具合を生じ
ていたことを見出した。さらに、ライナーの中央部のみ
を天板部内面に接着すること、その接着部の面積と非接
着部の面積の比を特定範囲内とすることによって、容器
内部の減圧状態を維持することができる十分な密封性
と、容器内圧が異常に上昇した場合にガスを放出する機
能の両方を兼ね備えたキャップが得られることを見出
し、本発明を完成させた。Means for Solving the Problems As a result of intensive research for solving the above-mentioned problems, the present inventor has found that all the surfaces of the liner on the top plate side are adhered and fixed to the inner surface of the top plate. In addition, the mechanical strength of the bonded part is increased, and even if the internal pressure of the container with this cap is abnormally high, the top plate of the cap is difficult to bulge upward, so the gas release function by the notch is fully exerted. However, it was found that the above-mentioned inconvenience occurred. Further, by adhering only the central portion of the liner to the inner surface of the top plate portion and setting the ratio of the area of the adhesive portion and the area of the non-adhesive portion within a specific range, the depressurized state inside the container can be maintained. The present invention has been completed by finding that a cap having both a sufficient sealing property and a function of releasing gas when the internal pressure of the container abnormally rises can be obtained.
【０００６】すなわち、本発明の請求項１に係る発明
は、天板部とその周縁から垂下した筒部とからなる金属
製のキャップ本体と、該キャップ本体の天板部内面に設
けられた板状の合成樹脂製のライナーとを備え、かつ上
記ライナーの周縁部に、該キャップ本体を装着するべき
容器口部上端面の外径と略等しい位置まで達する少なく
とも１個の切欠部または溝が設けられてなる金属製キャ
ップにおいて、上記ライナーの中央部のみがキャップ本
体の天板部内面に接着され、他部は該天板部内面に非接
着とされてなることを特徴とする金属製キャップであ
る。請求項２に係る発明は、上記切欠部が、上記容器口
部上端面の外径と内径との間に達するように形成された
ことを特徴とする請求項１記載の金属製キャップであ
る。請求項３に係る発明は、上記ライナーの接着部分の
面積と非接着部分の面積の比を１：１．５〜３としたこ
とを特徴とする請求項１または２記載の金属製キャップ
である。請求項４に係る発明は、上記切欠部の幅を１．
０〜１０．０ｍｍとしたことを特徴とする請求項１から
３のいずれか１項記載の金属製キャップである。請求項
５に係る発明は、上記キャップ本体の筒部上端部に、ガ
ス放出孔を穿設したことを特徴とする請求項１から４の
いずれか１項記載の金属製キャップである。That is, the invention according to claim 1 of the present invention is a metal cap body comprising a top plate portion and a cylindrical portion hanging down from the peripheral edge thereof, and a plate provided on the inner surface of the top plate portion of the cap body. -Shaped synthetic resin liner, and at least one notch or groove is provided on the peripheral edge of the liner to reach a position approximately equal to the outer diameter of the upper end face of the container mouth where the cap body is to be mounted. In the metal cap, the metal cap is characterized in that only the central part of the liner is adhered to the inner surface of the top plate of the cap body, and the other parts are not adhered to the inner surface of the top plate. is there. The invention according to claim 2 is the metal cap according to claim 1, wherein the cutout portion is formed so as to reach between the outer diameter and the inner diameter of the upper end surface of the container mouth portion. The invention according to claim 3 is the metal cap according to claim 1 or 2, wherein the ratio of the area of the adhesive portion of the liner to the area of the non-adhesive portion is 1: 1.5 to 3. . In the invention according to claim 4, the width of the notch is 1.
It is 0-10.0 mm, It is a metal cap of any one of Claim 1 to 3 characterized by the above-mentioned. The invention according to claim 5 is the metal cap according to any one of claims 1 to 4, characterized in that a gas discharge hole is formed in an upper end portion of the cylindrical portion of the cap body.
【０００７】[0007]
【発明の実施の形態】図１は本発明の金属製キャップの
一例を示すものである。このキャップ１０は、円形の天
板部１１とその周縁から垂下した筒部１２とからなる金
属製のキャップ本体１３と、該キャップ本体１３の天板
部１１内面側に、板状の合成樹脂製のライナー１４とを
備えて構成されている。このライナー１４の周縁には、
該キャップ本体１３を装着するべき容器口部５の上端面
６の外径と略等しい位置まで達する少なくとも１個（本
例では図２においては３個）の切欠部１５が形成されて
いる。このライナー１４は、中央部（接着部分１６）の
みが天板部１１内面と接着し、他部は天板部１１内面と
接着されていない非接着部分１７になっている。1 shows an example of a metal cap of the present invention. The cap 10 includes a cap body 13 made of a metal, which is composed of a circular top plate portion 11 and a cylindrical portion 12 hanging down from the peripheral edge thereof, and a plate-shaped synthetic resin on the inner surface side of the top body portion 11 of the cap body 13. And a liner 14 of. On the periphery of this liner 14,
At least one notch 15 (three in FIG. 2 in this example) reaching a position approximately equal to the outer diameter of the upper end surface 6 of the container mouth 5 to which the cap body 13 is to be attached is formed. Only the central portion (adhesive portion 16) of the liner 14 is adhered to the inner surface of the top plate portion 11, and the other portion is a non-adhesive portion 17 not adhered to the inner surface of the top plate portion 11.
【０００８】キャップ本体１３の筒部１２には、複数の
細いブリッジ１８を残して穿孔されたスコア１９が周方
向に沿って複数形成され、該スコア１９より上方の主部
２０と該スコア１９より下方のタンパーエビデンスリン
グ部（以下、ＴＥリング部と略記する）２１に区画され
ている。キャップ本体１３はアルミニウムまたはアルミ
ニウム合金から形成され、その板厚は概ね０．１５〜
０．２７ｍｍ程度とされている。The cylindrical portion 12 of the cap body 13 is formed with a plurality of scores 19 perforated with a plurality of thin bridges 18 left along the circumferential direction, and the main portion 20 above the score 19 and the score 19 are It is partitioned into a lower tamper evidence ring portion (hereinafter abbreviated as TE ring portion) 21. The cap body 13 is made of aluminum or an aluminum alloy, and its plate thickness is approximately 0.15 to 0.15.
It is set to about 0.27 mm.
【０００９】図２はライナー１４を示すものであり、こ
のライナー１４は、ポリエチレンなどのオレフィン系樹
脂を主成分とし、厚さ０．５〜２．０ｍｍ程度の板材ま
たはシートを容器口部５の上端面６の外径Ｒ1よりも大
きい外径を有する円形に打ち抜いて作製されている。ラ
イナーの周縁に形成された切欠部１５は、略Ｕ字または
角形に形成され、これらの切欠部１５の先端（径方向内
方端）は、容器口部５の上端面６の外径Ｒ1と内径Ｒ2の
間にある直径ｒの円（Ｒ2＜ｒ＜Ｒ1）に接するように形
成されている。またライナー周縁から円ｒに達する切欠
部１５の先端までの長さ、すなわち切欠部１５の切欠深
さＹは、通常０．５〜５．０ｍｍとされ、好ましくは
１．０〜４．０ｍｍとされる。FIG. 2 shows a liner 14. The liner 14 is mainly composed of an olefin resin such as polyethylene, and is made of a plate or sheet having a thickness of about 0.5 to 2.0 mm. It is manufactured by punching into a circular shape having an outer diameter larger than the outer diameter R1 of the upper end surface 6. The notches 15 formed in the peripheral edge of the liner are formed in a substantially U shape or a square shape, and the tips (radially inner ends) of these notches 15 are the outer diameter R1 of the upper end surface 6 of the container mouth 5. It is formed so as to contact a circle (R2 <r <R1) having a diameter r between the inner diameters R2. The length from the liner periphery to the tip of the cutout portion 15 reaching the circle r, that is, the cutout depth Y of the cutout portion 15 is usually 0.5 to 5.0 mm, preferably 1.0 to 4.0 mm. To be done.
【００１０】これら切欠部１５の形状は、この例示に限
定されることなく、半円形、長半円形、楕円形、Ｖ字形
などとして良く、また径方向外方に向けて広がったまた
は窄まった形状としても良い。切欠部１５の幅Ｘは１．
０〜１０．０ｍｍ程度とされる。この幅が１０．０ｍｍ
より大きいと、切欠部１５以外の周縁部が少なくなって
密封性や角部の耐衝撃性が劣化することになる。また、
この幅が１．０ｍｍより小さいと、切欠部１５からのガ
ス放出が困難となる。The shape of these notches 15 is not limited to this example, but may be semicircular, oblong semicircular, elliptical, V-shaped, or the like, and expands or narrows radially outward. It may be shaped. The width X of the notch 15 is 1.
It is about 0 to 10.0 mm. This width is 10.0 mm
If it is larger, the peripheral portion other than the notch 15 is reduced, and the sealing performance and the impact resistance of the corners are deteriorated. Also,
If this width is smaller than 1.0 mm, it becomes difficult to release gas from the cutout portion 15.
【００１１】このライナー１４は、アルミキャップ内面
の塗料に含まれた酸化ポリエチレンとライナー材のポリ
エチレンを、アルミキャップ外面からの熱板の熱で溶融
させ、所定の外径を有したポンチ（プランジャーヘッ
ド）で必要部分にのみ圧力を加えることで圧着固定され
ている。このポンチの外径を変更することで圧着の面積
は適宜設定することができる。The liner 14 is a punch (plunger) having a predetermined outer diameter obtained by melting polyethylene oxide contained in the paint on the inner surface of the aluminum cap and polyethylene of the liner material with the heat of the hot plate from the outer surface of the aluminum cap. The head is fixed by crimping by applying pressure only to the necessary parts. The area of crimping can be set appropriately by changing the outer diameter of the punch.
【００１２】ライナー１４と天板部１１とが接着された
接着部分１６の面積と非接着部分１７との面積の割合
は、接着部分：非接着部分＝１：１．５〜３程度、すな
わち接着部分１６の面積がライナー１４の天板部側面積
の２５〜４０％となるように設定される。接着部分１６
の面積が４０％より大きいと、天板部１１にライナー１
４が接着した接着部分１６が中央部から周縁部まで達す
ることにより天板部１１の機械強度が高くなり、容器内
圧が異常に高まったときに天板部１１の上方への膨出が
抑制され、容器内のガスを切欠部１５からスムーズに放
出することが困難となる。また、接着部分１６の面積が
２５％より小さいと、ライナー１４と天板部１１との接
着が弱まって、キャップ搬送時などの振動や衝撃によっ
てキャップ本体１３からライナー１４が外れ易くなり、
好ましくない。The ratio of the area of the adhesive portion 16 where the liner 14 and the top plate portion 11 are adhered to the area of the non-adhesive portion 17 is about adhesive portion: non-adhesive portion = 1: 1.5 to 3, that is, adhesive The area of the portion 16 is set to be 25 to 40% of the area of the liner 14 on the top plate side. Adhesive part 16
If the area is larger than 40%, the liner 1
When the bonded portion 16 to which 4 is bonded reaches from the central portion to the peripheral portion, the mechanical strength of the top plate portion 11 is increased, and the upward bulging of the top plate portion 11 is suppressed when the internal pressure of the container is abnormally increased. Therefore, it becomes difficult to smoothly discharge the gas in the container from the cutout portion 15. When the area of the adhesive portion 16 is smaller than 25%, the adhesion between the liner 14 and the top plate portion 11 is weakened, and the liner 14 is easily detached from the cap body 13 due to vibration or shock when the cap is conveyed.
Not preferred.
【００１３】図３は容器口部６にキャップ１０を装着し
た状態を示すものである。このキャップ装着状態にあっ
ては、キャップ本体１３の筒部が容器口部５の雄ネジ２
２に沿うように成形されるとともに、キャップ本体１３
のＴＥリング部２１の下端部は、容器口部５の雄ネジ２
２直下の膨出段部２３の下端面を覆うように成形加工さ
れている。また、このキャップ装着状態にあっては、ラ
イナー１４の切欠部１５の先端が容器口部５の上端面６
に位置している。切欠部１５以外のライナー１４の周縁
は、容器口部上端面６を越えて容器口部の外側面に接し
ている。FIG. 3 shows a state in which the cap 10 is attached to the container mouth 6. In this cap-attached state, the cylindrical portion of the cap body 13 has the male screw 2 of the container mouth portion 5.
2 is molded along with the cap body 13
The lower end of the TE ring portion 21 of the
It is formed so as to cover the lower end surface of the bulging step portion 23 immediately below 2. Further, in this cap mounted state, the tip of the cutout portion 15 of the liner 14 is located at the upper end surface 6 of the container mouth portion 5.
It is located in. The peripheral edge of the liner 14 other than the cutout portion 15 exceeds the upper end surface 6 of the container mouth portion and is in contact with the outer surface of the container mouth portion.
【００１４】容器口部上端面は、ライナー１４に当接し
て気密に閉止されており、６０〜８０℃程度に加温した
液体を容器に充填してキャップ１０を装着する充填方法
（以下、ホット充填という）を行い、液体の冷却に伴っ
て容器内部が減圧状態となった場合にも、切欠部１５か
ら空気が侵入したり、或いは容器内の液体が漏れ出すこ
とがない。The upper end surface of the container mouth is in contact with the liner 14 and is airtightly closed. The container is filled with the liquid heated to about 60 to 80 ° C. and the cap 10 is attached (hereinafter referred to as hot). Even if the inside of the container is depressurized due to the cooling of the liquid, the air does not enter through the notch 15 or the liquid in the container does not leak out.
【００１５】容器口部５に装着されたキャップ１０を開
栓方向に回すと、キャップ本体１３の主部２０は雄ネジ
２２に沿って回転しつつ上昇し、ＴＥリング部２１は下
端部が容器の膨出段部２３に係止して上昇が阻止される
ことから、主部２０とＴＥリング部２１とを連結した複
数のブリッジ１８に引張力が作用して、ブリッジ１８が
切断されＴＥリング部２１が主部２０から切り離され
る。さらに主部２０を開栓方向に回して容器口部５から
取り外す。容器内の液体を飲用した後、容器口部５にキ
ャップ１０の主部２０を被せて閉栓方向に回して閉止す
れば容器口部５が再閉止される。When the cap 10 attached to the container mouth portion 5 is rotated in the opening direction, the main portion 20 of the cap body 13 is raised while rotating along the male screw 22, and the lower end portion of the TE ring portion 21 is a container. Since it is locked to the bulging step portion 23 and is prevented from rising, a tensile force acts on the plurality of bridges 18 that connect the main portion 20 and the TE ring portion 21, and the bridges 18 are cut to disconnect the TE ring. The part 21 is separated from the main part 20. Further, the main portion 20 is rotated in the opening direction and removed from the container mouth portion 5. After drinking the liquid in the container, the container opening 5 is covered again with the main portion 20 of the cap 10 and rotated in the closing direction to close the container opening 5.
【００１６】中身の液体が減り、再閉止した容器を真夏
の車内や直射日光下などの高温の場所で保管すると、内
部が膨張して容器内圧が異常に高まる場合がある。この
キャップ１０は、容器内圧が所定圧力、例えば４．０ｋ
ｇ／ｃｍ2よりも高くなると、図４に示すように天板部
１１が上方に膨出するドーミングを起こす。ここで、こ
のキャップ１０では、ライナー１４の中央部のみがキャ
ップ本体１３の天板部１１内面に接着された接着部分１
６とされ、他部は該天板部１１内面に接着されていない
非接着部分になっていることから、天板部１１の強度が
ライナー１４の接着によって補強されることがないの
で、天板部１１は容易にドーミングすることになる。When the liquid content is reduced and the reclosed container is stored in a high temperature place such as in a car in the midsummer or under direct sunlight, the inside may expand and the internal pressure of the container may increase abnormally. The cap 10 has a predetermined container internal pressure, for example, 4.0 k.
When it becomes higher than g / cm 2 , the top plate portion 11 bulges upward as shown in FIG. 4, causing doming. Here, in this cap 10, only the central portion of the liner 14 is adhered to the inner surface of the top plate portion 11 of the cap body 13
6 and the other portion is a non-adhesive portion that is not adhered to the inner surface of the top plate portion 11. Therefore, the strength of the top plate portion 11 is not reinforced by the adhesion of the liner 14, so the top plate The part 11 will be easily domed.
【００１７】天板部１１がドーミングを生じると、ライ
ナー１４と容器口部上端面６、特にライナー１４の切欠
部１５と容器口部上端面６との押圧密着状態が弱めら
れ、その結果、切欠部１５と容器口部上端面６との密着
状態が容器内部のガス圧によって破られ、容器内のガス
が切欠部１５を通って外部に放出される。放出されたガ
スはキャップ本体１３の筒部１２と容器口部５の外面と
の間を通って大気に放出される。なお、放出されたガス
をスムーズにキャップ本体１３外に逃がすために、図１
中の符号２４で示すように、筒部１２に小さいガス放出
孔を複数穿設しても良い。When the top plate portion 11 causes doming, the press-contact state between the liner 14 and the container mouth upper end surface 6, particularly the notch 15 of the liner 14 and the container mouth upper end surface 6, is weakened, and as a result, the notch. The close contact state between the portion 15 and the upper end surface 6 of the container mouth is broken by the gas pressure inside the container, and the gas inside the container is discharged to the outside through the notch 15. The released gas passes through between the cylindrical portion 12 of the cap body 13 and the outer surface of the container mouth portion 5 and is released to the atmosphere. In order to smoothly release the released gas to the outside of the cap body 13,
As indicated by reference numeral 24 therein, a plurality of small gas discharge holes may be formed in the tubular portion 12.
【００１８】このキャップ１０によれば、ライナー１４
の中央部のみをキャップ本体１３の天板部１１内面に接
着された接着部分１６とし、他部は該天板部１１内面に
接着されていない非接着部分としたことによって、天板
部１１の強度がライナー１４の接着によって補強される
ことがなくなり、容器内圧が異常に高まった場合に天板
部１１は容易にドーミングし、容器内のガスが切欠部１
５から確実に外部に放出される。また、容器内圧が異常
に高まった場合に容器内のガスを切欠部１５から確実に
外部に放出できることから、切欠部１５の切欠深さＸを
浅くして、切欠部１５の先端を容器口部上端面６の外径
に近づけることができるので、切欠部１５を設けても密
封性を良好に保つことができ、ホット充填による容器内
の減圧状態を維持することができ、液漏れを確実に防止
することができる。以下、実施例によって本発明を更に
詳細に説明する。According to this cap 10, the liner 14
Of the top plate portion 11 of the cap body 13 by making only the central portion of the top plate portion 11 an adhesive portion 16 adhered to the inner surface of the top plate portion 11 and the other portions not being adhered to the inner surface of the top plate portion 11. The strength is not reinforced by the adhesion of the liner 14, and when the internal pressure of the container is abnormally increased, the top plate portion 11 easily domes, and the gas in the container is notched.
5 is surely released to the outside. Further, when the internal pressure of the container is abnormally increased, the gas in the container can be reliably discharged to the outside from the cutout portion 15. Therefore, the cutout depth X of the cutout portion 15 is made shallow so that the tip of the cutout portion 15 is located at the container opening portion. Since the diameter can be close to the outer diameter of the upper end surface 6, good sealing performance can be maintained even if the notch 15 is provided, and the depressurized state in the container due to hot filling can be maintained and liquid leakage can be ensured. Can be prevented. Hereinafter, the present invention will be described in more detail with reference to examples.
【００１９】[0019]
【実施例】厚さ０．２３ｍｍのアルミニウム合金薄板
（ＪＩＳ３１０５）を用いて図１に示す形状のキャップ
本体（外径２８ｍｍ）を作製した。厚さ０．７５ｍｍの
ポリエチレン系樹脂からなるシートを打ち抜いてライナ
ーを作製した。なお、打ち抜いたライナーの最大直径は
２７．５ｍｍとし、図２と同じくライナー周縁に４箇所
の切欠部を形成した。容器は３５０ｍｌのガラスボトル
を使用し、９０℃の温水を充填後、実施例と比較例のキ
ャップを巻き締め、リーク性能と密封性能の試験を行っ
た。このボトルの口部上端面の外径Ｒ1は２４．１ｍ
ｍ、内径Ｒ2は１９．３±０．７ｍｍである。EXAMPLE A cap body (outer diameter 28 mm) having the shape shown in FIG. 1 was produced using a 0.23 mm thick aluminum alloy thin plate (JIS3105). A 0.75 mm-thick polyethylene resin sheet was punched out to prepare a liner. The punched liner had a maximum diameter of 27.5 mm, and four notches were formed in the peripheral edge of the liner as in FIG. A 350 ml glass bottle was used as a container, and after filling hot water at 90 ° C., the caps of Examples and Comparative Examples were wound up and tested for leak performance and sealing performance. The outer diameter R1 of the upper end of the mouth of this bottle is 24.1 m.
m, and the inner diameter R2 is 19.3 ± 0.7 mm.
【００２０】ライナー圧着面積については、圧着ポンチ
の先端径をライナーの径に対して２０％〜９０％の範囲
で変更し、以下の表１に示す圧着割合のサンプルを作製
し以下の試験を行った。With respect to the liner pressure-bonding area, the tip diameter of the pressure-bonding punch was changed within the range of 20% to 90% with respect to the diameter of the liner, and a sample having a pressure-bonding ratio shown in Table 1 below was prepared and the following tests were conducted. It was
【００２１】（試験方法） ・リーク性能：熱充填後、冷却されたサンプルを開栓
し、１０ｋｇ-ｃｍのトルクで再栓する。再栓後、アル
コア社製のＰ．Ａ．Ｔ（プロパーアプリケーションテス
ター）にてキャップ天面に針を刺し、その針からガスを
送り込み、サンプル内に圧力をかけ、徐々に上昇させ、
液の漏れた時の値をリーク圧とする。判断基準は、４ｋ
ｇ／ｃｍ2以下でリークしたもの； △ ４〜１０ｋｇ／ｃｍ2でリークしたもの； ○ １０ｋｇ／ｃｍ2でリークしなかったもの；× とする。 ・密封性試験：各サンプルを１０°テーパの鉄板上へ高
さ２０ｃｍから落下させ真空度を測定し、密封性の有無
を確認する。 判断基準は、適正真空度があったもの；○ 真空度がなかったもの； × とする。 ・ライナー剥離試験：ライナー材の非接着部分にプッシ
ュプルゲージを取付けて引っ張り上げ、ライナーが剥離
する時の強度（接着強度）を測定する。 判断基準は、接着強度３ｋｇ未満；× 接着強度３ｋｇ以上；○ とする。これらの試験結果をまとめて表１に示す。(Test method) Leakage performance: After hot filling, the cooled sample is opened and re-closed with a torque of 10 kg-cm. After re-plugging, the Alcoa P. A. T (proper application tester) pierces the top of the cap with a needle, sends gas from the needle, applies pressure into the sample, and gradually raises it.
The value when the liquid leaks is the leak pressure. The criterion is 4k
g / cm 2 or less as the leak; △ 4~10kg / cm 2 as the leak-in; ○ those not leak in 10 kg / cm 2; and ×. -Sealing test: Each sample is dropped onto a 10 ° -tapered iron plate from a height of 20 cm, and the degree of vacuum is measured to confirm the presence or absence of sealing property. Judgment criteria are those with an appropriate degree of vacuum; ○ those without a degree of vacuum; x. -Liner peeling test: A push-pull gauge is attached to the non-bonded portion of the liner material and pulled up to measure the strength (bonding strength) when the liner peels off. The judgment criteria are: adhesive strength less than 3 kg; × adhesive strength of 3 kg or more; The results of these tests are summarized in Table 1.
【００２２】[0022]
【表１】 [Table 1]
【００２３】表１の結果から、ライナー材に切欠を設
け、ライナーの圧着割合（ライナーの径に対する圧着部
分の径の割合）を適宜に設定することで、リーク性能、
密封性のバランスのとれたキャップが得られることが確
認された。From the results shown in Table 1, the notch is provided in the liner material, and the crimping ratio of the liner (the ratio of the diameter of the crimping portion to the diameter of the liner) is appropriately set to obtain the leak performance,
It was confirmed that a cap having a well-balanced sealing property was obtained.
【００２４】[0024]
【発明の効果】以上説明したように、本発明の金属製キ
ャップは、ライナーの中央部のみをキャップ本体の天板
部内面に接着し、他部は該天板部内面に接着されていな
い構造としたことによって、天板部の強度がライナーの
接着によって補強されることがなくなり、容器内圧が異
常に高まった場合に天板部が容易にドーミングし、容器
内のガスが切欠部から確実に外部に放出される。また、
容器内圧が異常に高まった場合に容器内のガスを切欠部
から確実に外部に放出できることから、切欠部の切欠深
さを浅くして、切欠部の先端を容器口部上端面の外径に
近づけることができるので、切欠部を設けても密封性を
良好に保つことができ、ホット充填による容器内の減圧
状態を維持することができ、液漏れを確実に防止するこ
とができる。したがって、本発明によれば、容器内部の
減圧状態を維持することができる十分な密封性と、容器
内圧が異常に上昇した場合にガスを放出する機能の両方
を兼ね備えたキャップを提供することができる。As described above, in the metal cap of the present invention, only the central portion of the liner is bonded to the inner surface of the top plate of the cap body, and the other parts are not bonded to the inner surface of the top plate. By doing so, the strength of the top plate is not reinforced by the adhesion of the liner, and when the internal pressure of the container is abnormally increased, the top plate part is easily domed, and the gas in the container is surely secured from the notch. It is released to the outside. Also,
When the internal pressure of the container rises abnormally, the gas in the container can be reliably discharged to the outside from the notch, so the notch depth of the notch is made shallow and the tip of the notch becomes the outer diameter of the upper end surface of the container mouth. Since they can be brought close to each other, good sealing performance can be maintained even if the cutout portion is provided, the depressurized state in the container due to hot filling can be maintained, and liquid leakage can be reliably prevented. Therefore, according to the present invention, it is possible to provide a cap having both a sufficient sealing property capable of maintaining a depressurized state inside the container and a function of releasing gas when the internal pressure of the container abnormally rises. it can.
【図１】図１は本発明の金属製キャップの一例を示す一
部断面視した正面図である。FIG. 1 is a partially sectional front view showing an example of a metal cap of the present invention.
【図２】図２は図１のキャップのライナーの底面図であ
る。2 is a bottom view of the liner of the cap of FIG. 1. FIG.
【図３】図３は同じキャップを容器口部に装着した状態
を示す断面図である。FIG. 3 is a cross-sectional view showing a state in which the same cap is attached to a container mouth.
【図４】図４は同じキャップを容器口部に装着した後、
容器内圧が高まった状態を示す断面図である。FIG. 4 shows that after the same cap is attached to the mouth of the container,
It is sectional drawing which shows the state where the container internal pressure increased.
【図５】図５は従来の金属製キャップの一部断面視した
正面図である。FIG. 5 is a front view in which a conventional metal cap is partially sectioned.
５……容器口部、６……上端面、１０……金属製キャッ
プ、１１……天板部、１２……筒部、１３……キャップ
本体、１４……ライナー、１５……切欠部、１６……接
着部分、１７……未接着部分。5 ... container mouth, 6 ... upper end surface, 10 ... metal cap, 11 ... top plate, 12 ... cylinder, 13 ... cap body, 14 ... liner, 15 ... notch, 16 ... Adhesive part, 17 ... Non-adhesive part.
Claims (5)
らなる金属製のキャップ本体と、該キャップ本体の天板
部内面に設けられた板状の合成樹脂製のライナーとを備
え、かつ上記ライナーの周縁部に、該キャップ本体を装
着するべき容器口部上端面の外径と略等しい位置まで達
する少なくとも１個の切欠部または溝が設けられてなる
金属製キャップにおいて、 上記ライナーの中央部のみがキャップ本体の天板部内面
に接着され、他部は該天板部内面に非接着とされてなる
ことを特徴とする金属製キャップ。1. A cap body made of metal, which comprises a top plate part and a cylindrical part hanging down from a peripheral edge thereof, and a plate-shaped synthetic resin liner provided on an inner surface of the top plate part of the cap body, A metal cap having at least one notch or groove formed in a peripheral portion of the liner to reach a position substantially equal to the outer diameter of the upper end surface of the container mouth where the cap body is to be mounted, A metal cap, wherein only the central portion is adhered to the inner surface of the top plate portion of the cap body, and the other portion is not adhered to the inner surface of the top plate portion.
径と内径との間に達するように形成されたことを特徴と
する請求項１記載の金属製キャップ。2. The metal cap according to claim 1, wherein the cutout portion is formed so as to reach between the outer diameter and the inner diameter of the upper end surface of the container mouth portion.
部分の面積の比を１：１．５〜３としたことを特徴とす
る請求項１または２記載の金属製キャップ。3. The metal cap according to claim 1 or 2, wherein the ratio of the area of the adhesive portion of the liner to the area of the non-adhesive portion is 1: 1.5 to 3.
としたことを特徴とする請求項１から３のいずれか１項
記載の金属製キャップ。4. The width of the cutout is 1.0 to 10.0 mm.
The metal cap according to any one of claims 1 to 3, wherein:
放出孔を穿設したことを特徴とする請求項１から４のい
ずれか１項記載の金属製キャップ。5. The metal cap according to claim 1, wherein a gas discharge hole is formed in an upper end portion of the cylindrical portion of the cap body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8144643A JPH09328158A (en) | 1996-06-06 | 1996-06-06 | Metallic cap |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8144643A JPH09328158A (en) | 1996-06-06 | 1996-06-06 | Metallic cap |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09328158A true JPH09328158A (en) | 1997-12-22 |
Family
ID=15366845
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8144643A Pending JPH09328158A (en) | 1996-06-06 | 1996-06-06 | Metallic cap |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09328158A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7147123B2 (en) * | 2003-09-10 | 2006-12-12 | Takeuchi Press Industries Co., Ltd. | Metal cap |
| JP2007045452A (en) * | 2005-08-09 | 2007-02-22 | Japan Crown Cork Co Ltd | Container lid made of metal having internal pressure releasability |
| JP2009241944A (en) * | 2008-03-31 | 2009-10-22 | Nippon Light Metal Co Ltd | Filling container for roasted coffee beans |
| JP2010510632A (en) * | 2006-11-16 | 2010-04-02 | ソシエテ ビック | Fuel cartridge for fuel cell |
| US8584876B2 (en) | 2007-07-05 | 2013-11-19 | Kraft Foods Group Brands Llc | Food containers adapted for accommodating pressure changes using skip seals and methods of manufacture |
| JP2014114055A (en) * | 2012-12-11 | 2014-06-26 | Csi Japan:Kk | Metal cap, closure device, and closure device with beverage |
-
1996
- 1996-06-06 JP JP8144643A patent/JPH09328158A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7147123B2 (en) * | 2003-09-10 | 2006-12-12 | Takeuchi Press Industries Co., Ltd. | Metal cap |
| JP2007045452A (en) * | 2005-08-09 | 2007-02-22 | Japan Crown Cork Co Ltd | Container lid made of metal having internal pressure releasability |
| JP2010510632A (en) * | 2006-11-16 | 2010-04-02 | ソシエテ ビック | Fuel cartridge for fuel cell |
| US8822888B2 (en) | 2006-11-16 | 2014-09-02 | Societe Bic | Fuel cartridge for fuel cells |
| US8584876B2 (en) | 2007-07-05 | 2013-11-19 | Kraft Foods Group Brands Llc | Food containers adapted for accommodating pressure changes using skip seals and methods of manufacture |
| JP2009241944A (en) * | 2008-03-31 | 2009-10-22 | Nippon Light Metal Co Ltd | Filling container for roasted coffee beans |
| JP2014114055A (en) * | 2012-12-11 | 2014-06-26 | Csi Japan:Kk | Metal cap, closure device, and closure device with beverage |
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