JP7117981B2 - Synthetic resin cap - Google Patents

Synthetic resin cap Download PDF

Info

Publication number
JP7117981B2
JP7117981B2 JP2018220826A JP2018220826A JP7117981B2 JP 7117981 B2 JP7117981 B2 JP 7117981B2 JP 2018220826 A JP2018220826 A JP 2018220826A JP 2018220826 A JP2018220826 A JP 2018220826A JP 7117981 B2 JP7117981 B2 JP 7117981B2
Authority
JP
Japan
Prior art keywords
tamper evidence
band
evidence band
circumferential direction
cap
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.)
Active
Application number
JP2018220826A
Other languages
Japanese (ja)
Other versions
JP2020083387A (en
Inventor
伸生 川村
淳史 小野
慎吾 梅木
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nihon Yamamura Glass Co Ltd
Original Assignee
Nihon Yamamura Glass Co Ltd
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 Nihon Yamamura Glass Co Ltd filed Critical Nihon Yamamura Glass Co Ltd
Priority to JP2018220826A priority Critical patent/JP7117981B2/en
Publication of JP2020083387A publication Critical patent/JP2020083387A/en
Application granted granted Critical
Publication of JP7117981B2 publication Critical patent/JP7117981B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Closures For Containers (AREA)

Description

本発明は、例えば、飲料物等の内容物を収容する容器の口部に装着される合成樹脂製キャップに関する。 BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a synthetic resin cap that is attached to the mouth of a container that holds contents such as beverages.

飲料物等の内容物を収容する容器の口部に装着され、一目で開封の有無を確認可能に構成されたキャップは広く知られている。例えば特許文献1に開示されたキャップは、図4(A)及び(B)に示すように、容器口部Mの雄ねじM1に螺合する雌ねじ51が設けられたスカート壁52を有するキャップ本体53と、スカート壁52の下部に環状弱化部54を介して連結されたタンパーエビデンスバンド55とを具備する。 2. Description of the Related Art A cap that is attached to the mouth of a container containing a content such as a beverage and is configured to enable confirmation of whether or not the container has been opened at a glance is widely known. For example, the cap disclosed in Patent Document 1, as shown in FIGS. and a tamper evidence band 55 connected to the lower portion of the skirt wall 52 via an annular weakened portion 54 .

上記キャップでは、容器口部Mに装着された状態からの開封操作(最初の開栓操作)に伴い、タンパーエビデンスバンド55の内周に設けられた係合部(フック)56が容器口部Mの外周に設けられた環状突起(被係合部の一例)M2に係止した後、タンパーエビデンスバンド55とスカート壁52とを画する環状弱化部54が破断され、キャップ本体53とタンパーエビデンスバンド55とが互いに分離される。従って、環状弱化部54を構成するミシン目状のスリット間に形成されたブリッジ(橋絡部)の破断の有無を視認することにより、開封操作が行われたか否かを容易に確認することができる。 In the cap, when the opening operation (first opening operation) from the state of being attached to the container mouth portion M is performed, the engaging portion (hook) 56 provided on the inner periphery of the tamper evidence band 55 is moved to the container mouth portion M. After being engaged with the annular projection (an example of the engaged portion) M2 provided on the outer periphery of the cap body 53, the annular weakened portion 54 that separates the tamper evidence band 55 and the skirt wall 52 is broken, and the cap main body 53 and the tamper evidence band 55 are separated from each other. Therefore, by visually checking whether or not the bridge (bridging portion) formed between the perforated slits constituting the annular weakened portion 54 is broken, it is possible to easily confirm whether or not the unsealing operation has been performed. can.

特許第5291175号公報Japanese Patent No. 5291175

ところで、上記従来の合成樹脂製キャップでは、開封(最初の開栓)の際、一部のブリッジのみが破断して大きく口をひらくように変形するヒンジングが発生することがあり、本発明者らは、隣り合う係合部56どうしの間隔がこの現象に大きく影響していることを突き止めた。 By the way, in the above-mentioned conventional synthetic resin cap, when the cap is opened (first opening), only a part of the bridges may be broken and hinged in such a way that the mouth is wide open. found that the spacing between adjacent engaging portions 56 greatly affects this phenomenon.

本発明は上述の事柄に留意してなされたもので、その目的は、ヒンジングの発生防止を図ることができる合成樹脂製キャップを提供することにある。 SUMMARY OF THE INVENTION It is an object of the present invention to provide a synthetic resin cap capable of preventing the occurrence of hinging.

上記目的を達成するために、本発明に係る合成樹脂製キャップは、略筒状の側壁を有し、該側壁は、容器口部の外周に形成された雄ねじに螺合する雌ねじが設けられたスカート壁と、該スカート壁の下部に環状弱化部を介して連結され、前記容器口部の外周に形成された被係合部に係合する係合部が周方向に間隔をおいて複数設けられたタンパーエビデンスバンドとを含み、前記係合部は、前記タンパーエビデンスバンドの内方に向かって突出し、該係合部の左右両端部は、左右両端に向かって前記タンパーエビデンスバンドの内方への突出量が漸次小さくなるように構成され、前記間隔は中心角が0.4°~7.2°となる範囲で前記タンパーエビデンスバンドの周方向に延び、前記係合部において前記左右両端部に挟まれた中央部の一端から他端までの前記タンパーエビデンスバンドの内方への突出量は略一定であり、前記左右両端部は、前記中央部よりも狭く、前記間隔よりも広い角度範囲にわたって前記タンパーエビデンスバンドの周方向に延び、かつ、平面視における内縁の曲率半径R1が前記タンパーエビデンスバンドにおける前記係合部の最小内径R2の半分以下である(請求項1)。 In order to achieve the above object, a synthetic resin cap according to the present invention has a substantially cylindrical side wall, and the side wall is provided with a female thread that is screwed into a male thread formed on the outer periphery of the mouth of the container. A skirt wall and a plurality of engaging portions connected to a lower portion of the skirt wall via an annular weakened portion and engaged with a to-be-engaged portion formed on the outer circumference of the container mouth portion are provided at intervals in the circumferential direction. and a tamper evidence band mounted on the tamper evidence band, wherein the engaging portion protrudes inward of the tamper evidence band, and both left and right ends of the engaging portion project toward the inside of the tamper evidence band toward both left and right ends. , the interval extends in the circumferential direction of the tamper evidence band within a range where the center angle is 0.4° to 7.2°, and the left and right ends of the engaging portion The amount of inward protrusion of the tamper evidence band from one end to the other end of the central portion sandwiched between the two is substantially constant, and the left and right ends are narrower than the central portion and have a wider angular range than the interval , and the curvature radius R1 of the inner edge in plan view is half or less of the minimum inner diameter R2 of the engaging portion of the tamper evidence band (claim 1).

上記合成樹脂製キャップにおいて、前記タンパーエビデンスバンドの内周面において、前記係合部の上方には、該タンパーエビデンスバンドの上端部内面よりも内方に突出する嵌合部が全周にわたって設けられ、前記間隔を介して隣り合う二つの前記係合部の前記左右両端部は、該間隔を挟んで中心角が20°~40°となる範囲で前記タンパーエビデンスバンドの周方向に延び、かつ、平面視において、前記係合部の中央部の内縁によって規定される円と、前記嵌合部の内面と、前記間隔を介して隣り合う二つの前記係合部の前記左右両端部と前記中央部との各境界とで画される領域の全面積に対し、該領域内に位置する前記左右両端部の面積は4分の1以上であってもよい(請求項2)。 In the synthetic resin cap, above the engaging portion on the inner peripheral surface of the tamper evidence band, a fitting portion that protrudes inward from the inner surface of the upper end portion of the tamper evidence band is provided over the entire circumference. , the left and right end portions of the two engaging portions adjacent to each other with the space therebetween extend in the circumferential direction of the tamper evidence band within a range of a central angle of 20° to 40° across the space, and In a plan view, a circle defined by the inner edge of the central portion of the engaging portion, the inner surface of the fitting portion, the left and right end portions and the central portion of the two adjacent engaging portions with the space therebetween. The area of the left and right ends located within the area may be 1/4 or more of the total area of the area defined by each boundary between and (Claim 2 ).

本願発明では、ヒンジングの発生防止を図ることができる合成樹脂製キャップが得られる。 The present invention provides a synthetic resin cap capable of preventing the occurrence of hinging.

すなわち、本願発明の合成樹脂製キャップでは、左右に隣り合う係合部の間隔を中心角が0.4°~7.2°となる範囲でタンパーエビデンスバンドの周方向に延びるようにしたことにより、キャッピング性を良好に保ちつつ、ヒンジングの防止を図ることができる。 That is, in the synthetic resin cap of the present invention, the interval between the left and right adjacent engaging portions extends in the circumferential direction of the tamper evidence band within the range of a central angle of 0.4° to 7.2°. , it is possible to prevent hinging while maintaining good capping properties.

本発明の一実施の形態に係る合成樹脂製キャップの構成を概略的に示す底面図である。1 is a bottom view schematically showing the configuration of a synthetic resin cap according to one embodiment of the present invention; FIG. (A)は図1におけるA-A線断面図、(B)は図1におけるB部拡大図、(C)は図1におけるD-D線断面図である。1. (A) is a cross-sectional view taken along line AA in FIG. 1, (B) is an enlarged view of portion B in FIG. 1, and (C) is a cross-sectional view along line DD in FIG. 図1におけるC-C線断面図である。FIG. 2 is a sectional view taken along line CC in FIG. 1; (A)は従来の合成樹脂製キャップ、(B)はその容器口部への装着状態をそれぞれ示す正面図である。(A) is a conventional synthetic resin cap, and (B) is a front view showing how it is attached to the mouth of a container.

本発明の実施の形態について図面を参照しながら以下に説明する。 Embodiments of the present invention will be described below with reference to the drawings.

図1、図2(A)に示す合成樹脂製キャップ(以下、キャップという)1は、図4(B)に示すような雄ねじM1及び環状突起(被係合部の一例)M2を有する容器口部M(例えばペットボトル等の容器の口部)に装着されて使用されるものであり、コンプレッション成形又はインジェクション成形によって、ポリエチレンで一体的に成形されている。なお、キャップ1を形成する素材は、特に限定されるものではなく、本実施形態で用いたポリエチレンの他、ポリプロピレン等が好適に用いられる。 A synthetic resin cap (hereinafter referred to as a cap) 1 shown in FIGS. 1 and 2(A) has a male screw M1 and an annular projection (an example of an engaged portion) M2 as shown in FIG. 4(B). It is used by being attached to the part M (for example, the mouth part of a container such as a PET bottle), and is integrally formed of polyethylene by compression molding or injection molding. The material for forming the cap 1 is not particularly limited, and in addition to the polyethylene used in the present embodiment, polypropylene or the like is preferably used.

キャップ1は、平面視において略円形状の天壁2と、この天壁2の外周部から下向きに延びる略円筒状のスカート壁3を有する(図1、図2(A)参照)。ここで、図2(A)に示すように、スカート壁3の外周面にはローレット溝4を、内周面には雌ねじ5を設けてあり、この雌ねじ5は容器口部Mの外周に形成された雄ねじM1に結合可能である。 The cap 1 has a substantially circular top wall 2 in a plan view and a substantially cylindrical skirt wall 3 extending downward from the outer periphery of the top wall 2 (see FIGS. 1 and 2A). Here, as shown in FIG. 2A, the outer peripheral surface of the skirt wall 3 is provided with knurled grooves 4, and the inner peripheral surface thereof is provided with female threads 5. The female threads 5 are formed on the outer periphery of the container opening M. can be connected to the external thread M1.

そして、容器口部Mの雄ねじM1にスカート壁3の雌ねじ5が結合するようにキャップ1を回転させて容器口部Mに装着すると、図2(A)に示す天壁2の内面(下面)に連設された環状の中足(インナーリング)6、環状リブ7及び環状の外足(アウターリング)8が容器口部Mに密着し、これにより、容器口部Mが密封された状態となる。すなわち、キャップ1が容器口部Mに装着された状態では、中足6は容器口部M内に差し込まれて容器口部Mの内周面に密着し、環状リブ7は容器口部Mの環状の上端面に密着し、外足8は容器口部Mの外周面に密着するように構成されている。 Then, when the cap 1 is rotated so that the female thread 5 of the skirt wall 3 is coupled to the male thread M1 of the container mouth M and attached to the container mouth M, the inner surface (lower surface) of the top wall 2 shown in FIG. An annular middle leg (inner ring) 6, an annular rib 7, and an annular outer leg (outer ring) 8, which are continuous with each other, come into close contact with the container mouth M, thereby sealing the container mouth M. Become. That is, when the cap 1 is attached to the mouth portion M of the container, the middle leg 6 is inserted into the mouth portion M of the container and adheres to the inner peripheral surface of the mouth portion M of the container. The outer leg 8 is configured to be in close contact with the outer peripheral surface of the mouth portion M of the container.

また、キャップ1は、未開封(開栓が一度もされていないこと)を証明する機能を有するピルファープルーフキャップであり、容器口部Mに装着された未開封のキャップ1の開封時(最初の開栓時)に、雄ねじM1と雌ねじ5の結合が解除されるようにキャップ1を回転させると、キャップ1は容器口部Mから離脱するが、スカート壁3の下部に連結されたタンパーエビデンスバンド(以下、単に「バンド」という)9(図2(A)参照)は容器口部Mに残留するように構成されている。 In addition, the cap 1 is a pilfer proof cap that has a function to prove that it is unopened (that it has never been opened), and when the unopened cap 1 attached to the container mouth M is opened (first ), when the cap 1 is rotated so that the connection between the male screw M1 and the female screw 5 is released, the cap 1 is separated from the container mouth M, but the tamper evidence connected to the lower part of the skirt wall 3 A band (hereinafter simply referred to as a “band”) 9 (see FIG. 2A) is configured to remain on the mouth portion M of the container.

すなわち、スカート壁3の下部には、スカート壁3の全周にわたって延びる環状弱化部10を介してバンド9を連結してあり(図2(A)参照)、環状弱化部10は、スカート壁3とバンド9とを上下に画するように、スカート壁3及びバンド9の周方向に断続して延びる(ミシン目状の)スリットと、隣り合うスリットの間に存在するブリッジとで構成され、ブリッジは所定の力で引っ張られると破断する。 That is, the band 9 is connected to the lower portion of the skirt wall 3 via an annular weakened portion 10 extending along the entire circumference of the skirt wall 3 (see FIG. 2A). It consists of (perforation-like) slits intermittently extending in the circumferential direction of the skirt wall 3 and the band 9 so as to vertically demarcate the band 9 and the bridge existing between adjacent slits, and the bridge breaks when pulled with a given force.

ここで、本例では、バンド9の外径を上下にわたって均一にしてある一方、バンド9の内周側には、内向きに突出し、内側への突出量が上側ほど増大するように構成されたフック(係合部の一例)11を、周方向に間隔(本例では等間隔)Gをおいて5個(複数の一例)設けてある(図1、図2(A)参照)。各フック11は、キャップ1が容器口部Mに装着された状態で、容器口部Mの外周において雄ねじM1よりも下方に形成された環状突起M2(図4(B)参照)の略下側へ位置し、開封操作によって環状突起M2に係止する。すなわち、フック11は、環状突起M2に下方から係止可能に構成されている。なお、図3の2点鎖線は、フック11が設けられていない部分の断面形状を示している。 Here, in this example, while the outer diameter of the band 9 is uniform over the top and bottom, the inner peripheral side of the band 9 protrudes inward, and the amount of inward protrusion increases as it goes upward. Five hooks (an example of an engaging portion) 11 (an example of a plurality) are provided in the circumferential direction at intervals (equal intervals in this example) G (see FIGS. 1 and 2A). Each hook 11 is located substantially below an annular projection M2 (see FIG. 4B) formed below the male screw M1 on the outer periphery of the container mouth M when the cap 1 is attached to the container mouth M. , and engages with the annular projection M2 by the opening operation. That is, the hook 11 is configured so as to be able to be engaged with the annular protrusion M2 from below. A two-dot chain line in FIG. 3 indicates the cross-sectional shape of a portion where the hook 11 is not provided.

また、図3に示すように、バンド9の内周側において、フック11の上方には、バンド9の上端部内面よりも内方に突出し、その最大突出量はフック11の最大突出量よりも小さい(内径がフック11の内径よりも大きい)嵌合部12がバンド9の全周にわたって設けられ、さらに、嵌合部12の上方には上側ほど内径が大きくなる傾斜部13が連なっている。 Also, as shown in FIG. 3, on the inner peripheral side of the band 9, the hook 11 protrudes inward from the inner surface of the upper end portion of the band 9, and the maximum protrusion amount is larger than the maximum protrusion amount of the hook 11. A fitting portion 12 having a small inner diameter (larger than the inner diameter of the hook 11) is provided over the entire circumference of the band 9, and an inclined portion 13 having an inner diameter that increases toward the upper side continues above the fitting portion 12. As shown in FIG.

而して、容器口部Mに装着され未開封の状態では、環状突起M2が傾斜部13の内側またはそれより上方に位置し、この状態からキャップ1を開封方向に回転させると、容器口部Mに対してキャップ1が相対的に上昇し、嵌合部12が環状突起M2に嵌合し、フック11が環状突起M2に下方から係止する状態となる。さらにキャップ1を開封方向に回転させ続けると、やがて環状弱化部10は破断し、バンド9は容器口部Mに残留する一方、それより上側の天壁2及びスカート壁3からなるキャップ本体は容器口部Mから離脱することになる。 When the cap 1 is attached to the container opening M and is not opened, the annular projection M2 is positioned inside or above the inclined portion 13, and when the cap 1 is rotated in the opening direction from this state, the container opening is opened. The cap 1 rises relative to M, the fitting portion 12 fits into the annular projection M2, and the hook 11 engages the annular projection M2 from below. When the cap 1 is further rotated in the unsealing direction, the ring-shaped weakened portion 10 is eventually broken, and the band 9 remains in the container mouth portion M. It is separated from the mouth M.

従って、フック11が環状突起M2に下方から係止する状態になるまでの間に、傾斜部13が環状突起M2に当接し、さらに嵌合部12が環状突起M2の外周面に嵌合することにより、バンド9が斜めに持ち上がることが防止され、環状弱化部10が偏らずに略均一に破断するので、タンパーエビデンス性は良好となる。そして、開栓の際、嵌合部12は容器口部Mの環状突起M2の外周面に嵌合し、フック11は環状突起M2に確実に係合するので、環状弱化部10が破断することなくフック11が環状突起M2を乗り越える、いわゆるすっぽ抜けの発生防止を図ることができる。 Therefore, until the hook 11 is engaged with the annular protrusion M2 from below, the inclined portion 13 abuts the annular protrusion M2, and the fitting portion 12 is fitted to the outer peripheral surface of the annular protrusion M2. As a result, the band 9 is prevented from being obliquely lifted, and the ring-shaped weakened portion 10 is broken substantially uniformly without being biased, resulting in good tamper evidence. When the cap is opened, the fitting portion 12 is fitted to the outer peripheral surface of the annular protrusion M2 of the container mouth portion M, and the hook 11 is securely engaged with the annular protrusion M2, so that the annular weakened portion 10 is not broken. Therefore, it is possible to prevent the hook 11 from slipping over the annular projection M2 without any force.

ところで、上記のように嵌合部12を設けると、キャップ1を容器口部Mに装着する際、両者1、Mの間に生じる抵抗が大きくなり、環状弱化部10がそれだけ破断し易くなる。そこで、本例では、容器口部Mへのキャップ1の装着時における環状弱化部10の破断防止機能を高めるために、スカート壁3とバンド9とを含む略筒状の側壁14(図2(A)参照)の内周面における環状弱化部10から雌ねじ5の最下位置までの間の領域に、該側壁14の周方向に連続する溝15を設け、側壁14を変形(拡径)し易くした。 By the way, if the fitting portion 12 is provided as described above, when the cap 1 is attached to the mouth portion M of the container, the resistance generated between the cap 1 and M increases, and the annular weakened portion 10 is more likely to break. Therefore, in this example, in order to enhance the function of preventing breakage of the annular weakened portion 10 when the cap 1 is attached to the container mouth portion M, a substantially cylindrical side wall 14 (see FIG. 2 ( A)) is provided in the region between the annular weakened portion 10 and the lowest position of the internal thread 5 on the inner peripheral surface of the side wall 14 to deform (expand) the side wall 14 in the circumferential direction. made it easier.

この溝15は、具体的には、図3に示すように、上端から下端に向かって深くなるようにテーパ状に形成されている。また、本例では、側壁14の外周面において環状弱化部10よりも上方であって雌ねじ5の最下位置から下方に離れた位置(図示例では雌ねじ5の最下位置より環状弱化部10に近い位置)に肉厚となる環状突出部16が設けられ、溝15はこの環状突出部16よりも上方にまで延び、溝15の下端は、環状弱化部10の下方にある傾斜部13に連続している。 Specifically, as shown in FIG. 3, the groove 15 is formed in a tapered shape so as to become deeper from the upper end to the lower end. In this example, a position above the annular weakened portion 10 on the outer peripheral surface of the side wall 14 and below the lowest position of the female thread 5 (in the illustrated example, the annular weakened portion 10 The groove 15 extends above the annular protrusion 16, and the lower end of the groove 15 continues to the inclined portion 13 below the annular weakened portion 10. is doing.

上記のような溝15を設けたことにより、側壁14における環状弱化部10の上側の部位(本例ではスカート壁3の下部からバンド9の上部にかけての部位)が肉薄になって変形(拡径)し易くなり、容器口部Mへのキャップ1の装着時に容器口部Mから環状弱化部10に加わる力の少なくとも一部が前記変形に変換されるので、環状弱化部10の破断防止機能が高まる上、側壁14の肉薄化に伴って使用樹脂量の低減を図ることも可能となる。 By providing the groove 15 as described above, the portion of the side wall 14 above the annular weakened portion 10 (in this example, the portion from the lower portion of the skirt wall 3 to the upper portion of the band 9) is thinned and deformed (expanded diameter). ), and since at least part of the force applied from the container mouth portion M to the annular weakened portion 10 when the cap 1 is attached to the container mouth portion M is converted into the deformation, the breakage prevention function of the annular weakened portion 10 is improved. In addition to this, it is also possible to reduce the amount of resin used as the side wall 14 is made thinner.

特に本例では、上述のように、肉厚の環状突出部16よりも上方にまで溝15を延ばしたことにより、側壁14における環状突出部16よりも上方の部位に変形し易い肉薄部が必ず形成されることになるので、上記の破断防止機能が確実に高まることになる。そして、斯かる効果をより確実に得るという観点からは、溝15の上端を環状弱化部10よりも雌ねじ5の最下位置に近くするのが好適であり、この場合、より上方から側壁14(バンド9)が拡径するので、それだけ環状弱化部10の破断を生じ難くすることができる。一方、溝15の下端は、環状弱化部10の下方にまで延ばす必要はなく、例えば環状突出部16の下端の高さ位置まで延ばすようにしてもよい。 In particular, in this example, as described above, the groove 15 is extended above the thick annular projection 16, so that the easily deformable thin portion of the side wall 14 above the annular projection 16 is always formed. Since it will be formed, the above-mentioned break prevention function will certainly be improved. From the viewpoint of obtaining such an effect more reliably, it is preferable to bring the upper end of the groove 15 closer to the lowest position of the internal thread 5 than the annular weakened portion 10. In this case, the side wall 14 ( Since the band 9) is expanded in diameter, it is possible to make the annular weakened portion 10 less likely to break. On the other hand, the lower end of the groove 15 does not need to extend below the annular weakened portion 10, and may extend to the height of the lower end of the annular projecting portion 16, for example.

そして、本例では、図2(B)、(C)及び図3に示すように、バンド9の全周にわたって設けた嵌合部12を、各フック11の上方に位置する直上部12Aと、バンド9の周方向に隣り合う直上部12Aどうしを連結する連結部12Bとによって構成し、連結部12Bは、バンド9の上端部内面よりも内方に突出し、かつ、直上部12Aよりもバンド9の内方への突出量を例えば0.1mm~0.3mm程度小さくしてある。例えば、バンド9において直上部12Aに対応する部分の肉厚が0.75mm、連結部12Bに対応する部分の肉厚が0.6mmである場合、両部分の外径は同一であるから、連結部12Bは直上部12Aよりバンド9の内方への突出量が0.15mm小さいということになるのであって、バンド9において連結部12Bに対応する部分の肉厚(すなわち、バンド9における周方向の肉厚最小値)は0.5mm以上とするのが好ましい。 In this example, as shown in FIGS. 2B, 2C, and 3, the fitting portion 12 provided over the entire circumference of the band 9 is composed of a right upper portion 12A positioned above each hook 11, and a connecting portion 12B that connects adjacent right upper portions 12A of the band 9 in the circumferential direction. The amount of inward protrusion of is reduced, for example, by about 0.1 mm to 0.3 mm. For example, if the band 9 has a thickness of 0.75 mm at a portion corresponding to the right upper portion 12A and a thickness of 0.6 mm at a portion corresponding to the connecting portion 12B, the outer diameters of both portions are the same. The portion 12B projects inward from the band 9 by 0.15 mm less than the right upper portion 12A. is preferably 0.5 mm or more.

ここで、仮に、図4(A)及び(B)に示す従来の合成樹脂製キャップのように、嵌合部12の肉厚を周方向に均一にし、連結部12Bの部分を直上部12Aの内面と面一にすると、嵌合部12と容器口部Mの環状突起M2との当接(嵌合)が強すぎた場合に、バンド9に白化や割れが生じる恐れが高まる。しかし、本例のキャップ1では、バンド9内方への突出量が異なる直上部12Aと連結部12Bとによって嵌合部12を構成したことにより、嵌合部12と容器口部Mの環状突起M2との当接(嵌合)が強すぎた場合でも、連結部12Bによってその嵌合が緩和されるので、それだけバンド9の白化や割れの防止の確実化を図ることができる。 Here, as in the conventional synthetic resin cap shown in FIGS. If the fitting portion 12 and the annular protrusion M2 of the container mouth portion M come into contact (fitting) too strongly when they are flush with the inner surface, the possibility of whitening or cracking of the band 9 increases. However, in the cap 1 of this example, the fitting portion 12 is composed of the right upper portion 12A and the connecting portion 12B that project inwardly from the band 9 in different amounts, so that the fitting portion 12 and the annular projection of the container mouth portion M Even if the abutment (fitting) with M2 is too strong, the fitting is relaxed by the connecting portion 12B, so that whitening and cracking of the band 9 can be reliably prevented.

また、逆に、連結部12Bの部分をバンド9の上端部内面と面一にし、嵌合部12を直上部12Aのみで構成すると、脱型時等にバンド9に加わる圧力が直上部12Aの縁付近に集中して、バンド9の白化や割れが生じ易くなる。しかし、本例のキャップ1では、連結部12Bをバンド9の上端部内面よりもバンド9内方に突出させてあることにより、上記圧力の集中が抑えられ、脱型時等におけるバンド9の白化や割れの防止の確実化をも図ることができる。 Conversely, if the connecting portion 12B is made flush with the inner surface of the upper end portion of the band 9, and the fitting portion 12 is constituted only by the right upper portion 12A, the pressure applied to the band 9 during demolding or the like is applied to the right upper portion 12A. Whitening and cracking of the band 9 tend to occur, concentrating in the vicinity of the edge. However, in the cap 1 of this example, the connecting portion 12B protrudes inward of the band 9 from the inner surface of the upper end portion of the band 9, thereby suppressing the concentration of the pressure and whitening the band 9 at the time of demolding. It is also possible to ensure the prevention of cracks.

また、直上部12Aと連結部12Bのバンド9内方への突出量の差を設けることにより、連結部12Bの内側空間(連結部12Bと環状突起M2の隙間)を、容器口部Mの洗浄液の排液口として利用することも可能となる。 In addition, by providing a difference in the amount of protrusion inward of the band 9 between the right upper portion 12A and the connecting portion 12B, the inner space of the connecting portion 12B (the gap between the connecting portion 12B and the annular protrusion M2) can be used for the cleaning liquid of the container mouth portion M. It is also possible to use it as a drainage port.

ここで、図2(B)に示すように、本例のフック11の左右両端部11A、11Bは左右両端に向かってバンド9の内方への突出量が漸次小さくなるように構成され、フック11において左右両端部11A、11Bに挟まれた中央部11Cの一端から他端までのバンド9の内方への突出量は略一定である。そして、左右(バンド9の周方向)に隣り合うフック11の間隔Gは中心角α(図1参照)が0.4°~7.2°となる範囲でバンド9の周方向に延びる。中心角αが0.4°未満であるとキャップ1のキャッピング性が低下し、7.2°超であるとヒンジングが生じ易くなるが、中心角αを0.4°~7.2°とするキャップ1では、キャッピング性を良好に保ちつつ、ヒンジングの防止を図ることができる。 Here, as shown in FIG. 2(B), the left and right ends 11A and 11B of the hook 11 of this example are configured so that the amount of inward projection of the band 9 gradually decreases toward the left and right ends, and the hook The amount of inward protrusion of the band 9 from one end to the other end of the central portion 11C sandwiched between the left and right end portions 11A and 11B of the band 11 is substantially constant. The interval G between the hooks 11 adjacent to each other on the left and right (in the circumferential direction of the band 9) extends in the circumferential direction of the band 9 within a range where the central angle α (see FIG. 1) is 0.4° to 7.2°. When the central angle α is less than 0.4°, the capping property of the cap 1 is deteriorated, and when it exceeds 7.2°, hinges are likely to occur. With the cap 1, it is possible to prevent hinging while maintaining good capping properties.

図2(A)に示すように、左右両端部11A、11Bは、中央部11Cよりも狭く、間隔Gよりも広い角度範囲にわたってバンド9の周方向に延び(バンド9の周方向の長さをみると、左右両端部11A、11Bは中央部11Cより短く、間隔Gより長い)、かつ、平面視における左右両端部11A、11Bの内縁の曲率半径R1(図2(B)参照)がバンド9におけるフック11の最小内径R2(図2(B)参照)の半分以下であることが、ヒンジング防止の点で好適である。 As shown in FIG. 2A, the left and right end portions 11A and 11B are narrower than the central portion 11C and extend in the circumferential direction of the band 9 over an angular range wider than the interval G (the length of the band 9 in the circumferential direction is The left and right ends 11A and 11B are shorter than the central portion 11C and longer than the gap G), and the radius of curvature R1 of the inner edges of the left and right ends 11A and 11B in plan view (see FIG. 2B) is the same as that of the band 9. From the viewpoint of hinging prevention, it is preferable that the minimum inner diameter R2 (see FIG. 2B) of the hook 11 is half or less.

さらに、間隔Gを介して隣り合う二つのフック11の左右両端部11A、11B(図2(B)に示す一のフック11の左端部11Aとこれに隣り合う他のフック11の右端部11B)は、間隔Gを挟んで中心角β(図1参照)が20°~40°となる範囲でバンド9の周方向に延び(換言すれば、一のフック11の左端部11Aの右端から、この左端部11Aに間隔Gを介して隣り合う右端部11Bの左端までの中心角βが20°~40°)、かつ、平面視において、フック11の中央部11Cの内縁によって規定される円17(図2(B)に円17の一部のみを図示)と、嵌合部12の内面と、間隔Gを介して隣り合う二つのフック11の左右両端部11A,11Bと中央部11Cとの各境界18とで画される領域R(図2(B)の下図参照)の全面積に対し、領域R内に位置する左右両端部11A,11Bの面積を4分の1以上とするのが、ヒンジング防止の点でより好適である。 Furthermore, left and right end portions 11A and 11B of two hooks 11 adjacent to each other with an interval G (the left end portion 11A of one hook 11 and the right end portion 11B of the other hook 11 adjacent thereto shown in FIG. 2B) extends in the circumferential direction of the band 9 within a range where the central angle β (see FIG. 1) is 20° to 40° across the interval G (in other words, from the right end of the left end portion 11A of one hook 11, this The central angle β to the left end of the right end portion 11B adjacent to the left end portion 11A with a gap G is 20° to 40°), and in plan view, a circle 17 defined by the inner edge of the central portion 11C of the hook 11 ( FIG. 2(B) shows only a part of the circle 17), the inner surface of the fitting portion 12, the left and right ends 11A and 11B of the two hooks 11 adjacent to each other with the gap G therebetween, and the central portion 11C. The area of the left and right end portions 11A and 11B located within the region R is set to 1/4 or more of the total area of the region R defined by the boundary 18 (see the lower diagram of FIG. 2B). This is more suitable for preventing hinging.

なお、本発明は、上記の実施の形態に何ら限定されず、本発明の要旨を逸脱しない範囲において種々に変形して実施し得ることは勿論である。例えば、以下のような変形例を挙げることができる。 It goes without saying that the present invention is not limited to the above-described embodiments, and can be modified in various ways without departing from the gist of the present invention. For example, the following modifications can be given.

図2(A)~(C)の例では、フック11の直上にちょうど収まる領域に直上部12Aを設けているが、これに限らず、直上部12Aがフック11の直上の領域から側方に多少はみ出していてもよいし逆に連結部12Bがフック11の直上の領域に多少かかっていてもよい。また、図2(C)の例では、連結部12Bの上下幅を直上部12Aの上下幅と同一としているが、これに限らず、連結部12Bの上下幅を直上部12Aの上下幅よりも小さくしてもよい。但し、連結部12Bの上下幅を直上部12Aの上下幅の半分以上とすることが、脱型時や開封時における連結部12B付近への応力集中を防止する点で好ましい。 In the example of FIGS. 2A to 2C, the right upper part 12A is provided in the area just above the hook 11, but the right upper part 12A is not limited to this, and the right upper part 12A extends laterally from the area right above the hook 11. The connecting portion 12B may slightly protrude, or conversely, the connecting portion 12B may slightly overlap the area directly above the hook 11. - 特許庁In the example of FIG. 2(C), the vertical width of the connecting portion 12B is the same as the vertical width of the right upper portion 12A. You can make it smaller. However, it is preferable to set the vertical width of the connecting portion 12B to be half or more of the vertical width of the right upper portion 12A in order to prevent stress concentration in the vicinity of the connecting portion 12B when demolding or unsealing.

図3の例では、溝15は下側ほど深くなるテーパ状としてあるが、溝15の形状はこれに限らず、例えば、上側ほど深いテーパ状としたり、上下にわたって深さが一定としたりしてもよいし、溝15の深さを上下にわたって規則的又は不規則に変化させてもよい。 In the example of FIG. 3, the groove 15 has a tapered shape that becomes deeper toward the bottom, but the shape of the groove 15 is not limited to this. Alternatively, the depth of the groove 15 may be varied vertically or irregularly.

また、図3の例では溝15を側壁の周方向に連続させているが、これに限らず、溝15を側壁14の周方向に断続させてもよい。この場合、側壁14を変形(拡径)させ易くして環状弱化部10の破断防止機能を高めることのできる範囲で、溝15の数や幅等の構成を種々に設定可能である。 In the example of FIG. 3, the grooves 15 are continuous in the circumferential direction of the side wall, but the grooves 15 may be intermittent in the circumferential direction of the side wall 14 without being limited to this. In this case, the configuration such as the number and width of the grooves 15 can be set variously as long as the side wall 14 can be easily deformed (diameter expanded) and the fracture prevention function of the annular weakened portion 10 can be enhanced.

溝15を上下方向に複数設けてもよく、特に、溝15を側壁14の周方向に断続させる場合は、複数の溝15を側壁14の内周面の周方向に沿って行列状や千鳥状に設けてもよい。 A plurality of grooves 15 may be provided in the vertical direction, and in particular, when the grooves 15 are intermittent in the circumferential direction of the side wall 14, the plurality of grooves 15 are arranged in a matrix or staggered manner along the circumferential direction of the inner peripheral surface of the side wall 14. may be set to

なお、上記変形例どうしを適宜組み合わせてもよいことはいうまでもない。 Needless to say, the modifications described above may be combined as appropriate.

1 キャップ
2 天壁
3 スカート壁
4 ローレット溝
5 雌ねじ
6 中足
7 環状リブ
8 外足
9 タンパーエビデンスバンド
10 環状弱化部
11 フック(係合部)
12 嵌合部
12A 直上部
12B 連結部
13 傾斜部
14 側壁
15 溝
16 環状突出部
17 円
18 境界
51 雌ねじ
52 スカート壁
53 キャップ本体
54 環状弱化部
55 タンパーエビデンスバンド
56 係合部
G 間隔
M 容器口部
M1 雄ねじ
M2 環状突起(被係合部)
R 領域
R1 曲率半径
R2 曲率半径
α 中心角
β 中心角
1 cap 2 top wall 3 skirt wall 4 knurled groove 5 female screw 6 middle foot 7 annular rib 8 outer foot 9 tamper evidence band 10 annular weakened portion 11 hook (engagement portion)
12 Fitting portion 12A Right upper portion 12B Connecting portion 13 Inclined portion 14 Side wall 15 Groove 16 Annular protrusion 17 Circle 18 Boundary 51 Internal thread 52 Skirt wall 53 Cap body 54 Annular weakened portion 55 Tamper evidence band 56 Engagement portion G Interval M Container opening Part M1 Male screw M2 Annular projection (engaged part)
R region R1 radius of curvature R2 radius of curvature α central angle β central angle

Claims (2)

略筒状の側壁を有し、
該側壁は、容器口部の外周に形成された雄ねじに螺合する雌ねじが設けられたスカート壁と、該スカート壁の下部に環状弱化部を介して連結され、前記容器口部の外周に形成された被係合部に係合する係合部が周方向に間隔をおいて複数設けられたタンパーエビデンスバンドとを含み、
前記係合部は、前記タンパーエビデンスバンドの内方に向かって突出し、該係合部の左右両端部は、左右両端に向かって前記タンパーエビデンスバンドの内方への突出量が漸次小さくなるように構成され、
前記間隔は中心角が0.4°~7.2°となる範囲で前記タンパーエビデンスバンドの周方向に延び
前記係合部において前記左右両端部に挟まれた中央部の一端から他端までの前記タンパーエビデンスバンドの内方への突出量は略一定であり、
前記左右両端部は、前記中央部よりも狭く、前記間隔よりも広い角度範囲にわたって前記タンパーエビデンスバンドの周方向に延び、かつ、平面視における内縁の曲率半径R1が前記タンパーエビデンスバンドにおける前記係合部の最小内径R2の半分以下であることを特徴とする合成樹脂製キャップ。
having a substantially cylindrical side wall,
The side wall is connected to a skirt wall provided with a female thread that engages with a male thread formed on the outer periphery of the container mouth, and to the lower part of the skirt wall through an annular weakened portion, and is formed on the outer periphery of the container mouth. A tamper evidence band in which a plurality of engaging portions that engage with the engaged portions are provided at intervals in the circumferential direction,
The engaging portion protrudes toward the inside of the tamper evidence band, and the left and right ends of the engaging portion are arranged so that the amount of inward projection of the tamper evidence band gradually decreases toward the left and right ends. configured,
The interval extends in the circumferential direction of the tamper evidence band within a range where the central angle is 0.4° to 7.2° ,
The amount of inward protrusion of the tamper evidence band from one end to the other end of the central portion sandwiched between the left and right ends in the engaging portion is substantially constant,
The left and right end portions are narrower than the central portion and extend in the circumferential direction of the tamper evidence band over an angular range wider than the interval, and the radius of curvature R1 of the inner edge in plan view is the engagement in the tamper evidence band. A synthetic resin cap having a diameter less than half of the minimum inner diameter R2 of the part .
前記タンパーエビデンスバンドの内周面において、前記係合部の上方には、該タンパーエビデンスバンドの上端部内面よりも内方に突出する嵌合部が全周にわたって設けられ、
前記間隔を介して隣り合う二つの前記係合部の前記左右両端部は、該間隔を挟んで中心角が20°~40°となる範囲で前記タンパーエビデンスバンドの周方向に延び、かつ、平面視において、前記係合部の中央部の内縁によって規定される円と、前記嵌合部の内面と、前記間隔を介して隣り合う二つの前記係合部の前記左右両端部と前記中央部との各境界とで画される領域の全面積に対し、該領域内に位置する前記左右両端部の面積は4分の1以上である請求項1に記載の合成樹脂製キャップ。
On the inner peripheral surface of the tamper evidence band, above the engaging portion, a fitting portion that protrudes inward from the inner surface of the upper end portion of the tamper evidence band is provided over the entire circumference,
The left and right end portions of the two engaging portions adjacent to each other across the interval extend in the circumferential direction of the tamper evidence band within a range of 20° to 40° center angle across the interval, and are flat In view, a circle defined by the inner edge of the central portion of the engaging portion, the inner surface of the fitting portion, the left and right end portions and the central portion of the two adjacent engaging portions with the space therebetween. 2. The synthetic resin cap according to claim 1, wherein the area of said left and right end portions located within said region is 1/4 or more of the total area of said region defined by each boundary of said region .
JP2018220826A 2018-11-27 2018-11-27 Synthetic resin cap Active JP7117981B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2018220826A JP7117981B2 (en) 2018-11-27 2018-11-27 Synthetic resin cap

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2018220826A JP7117981B2 (en) 2018-11-27 2018-11-27 Synthetic resin cap

Publications (2)

Publication Number Publication Date
JP2020083387A JP2020083387A (en) 2020-06-04
JP7117981B2 true JP7117981B2 (en) 2022-08-15

Family

ID=70906129

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2018220826A Active JP7117981B2 (en) 2018-11-27 2018-11-27 Synthetic resin cap

Country Status (1)

Country Link
JP (1) JP7117981B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101947245B1 (en) * 2015-12-30 2019-02-12 소닉스 테크놀러지 컴퍼니 리미티드 Sensing device and optical sensing module

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007069657A1 (en) 2005-12-16 2007-06-21 Universal Can Corporation Cap member and container with cap
JP4128253B2 (en) 1996-12-23 2008-07-30 ロバート ボッシュ ゲーエムベーハー Radial-piston pump for internal combustion engine fuel
JP2012201402A (en) 2011-03-28 2012-10-22 Japan Crown Cork Co Ltd Combination of container with synthetic resin lid
JP5291175B2 (en) 2011-12-16 2013-09-18 日本クロージャー株式会社 Synthetic resin container lid and combination of container lid and container
JP2013203440A (en) 2012-03-28 2013-10-07 Nippon Closures Co Ltd Synthetic-resin-made container cover
JP2017202862A (en) 2016-05-13 2017-11-16 日本クロージャー株式会社 Synthetic resin-made container lid

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0497057U (en) * 1990-12-27 1992-08-21
JPH04128253U (en) * 1991-05-14 1992-11-24 株式会社柴崎製作所 pilfer proof cap
JP2008024364A (en) * 2006-07-25 2008-02-07 Universal Seikan Kk Pilfer-proof cap and bottle

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4128253B2 (en) 1996-12-23 2008-07-30 ロバート ボッシュ ゲーエムベーハー Radial-piston pump for internal combustion engine fuel
WO2007069657A1 (en) 2005-12-16 2007-06-21 Universal Can Corporation Cap member and container with cap
JP2007161331A (en) 2005-12-16 2007-06-28 Universal Seikan Kk Cap material, and container with cap
JP2012201402A (en) 2011-03-28 2012-10-22 Japan Crown Cork Co Ltd Combination of container with synthetic resin lid
JP5291175B2 (en) 2011-12-16 2013-09-18 日本クロージャー株式会社 Synthetic resin container lid and combination of container lid and container
JP2013203440A (en) 2012-03-28 2013-10-07 Nippon Closures Co Ltd Synthetic-resin-made container cover
JP2017202862A (en) 2016-05-13 2017-11-16 日本クロージャー株式会社 Synthetic resin-made container lid

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101947245B1 (en) * 2015-12-30 2019-02-12 소닉스 테크놀러지 컴퍼니 리미티드 Sensing device and optical sensing module

Also Published As

Publication number Publication date
JP2020083387A (en) 2020-06-04

Similar Documents

Publication Publication Date Title
JP6204621B1 (en) Synthetic resin caps and containers
JP7117981B2 (en) Synthetic resin cap
JP6180687B1 (en) Synthetic resin caps and containers
JP7117982B2 (en) Synthetic resin cap
JP6932705B2 (en) Resin cap
JP6539011B1 (en) Synthetic resin cap and container
WO2020179608A1 (en) Cap
JP5271650B2 (en) Plastic cap for beverage containers
JP7348789B2 (en) Synthetic resin cap
JP7409813B2 (en) Synthetic resin cap
JP6564141B2 (en) Plastic cap
JP7348902B2 (en) Synthetic resin cap
JP2017124837A (en) Synthetic resin cap
JP7005267B2 (en) Synthetic resin caps and containers
JP5918450B1 (en) Synthetic resin caps and containers
JP6937542B2 (en) Synthetic resin cap
JP7037915B2 (en) Synthetic resin caps and containers
WO2020179607A1 (en) Synthetic resin cap
JP7466828B2 (en) Plastic container lid
WO2020054259A1 (en) Synthetic resin cap
JP2021050007A (en) Synthetic resin cap and container
JP2020040719A (en) Synthetic resin cap
JP2005022695A (en) Cap and combination of the cap with container

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20210706

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20220510

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20220523

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20220705

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20220719

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20220802

R150 Certificate of patent or registration of utility model

Ref document number: 7117981

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150