JP5973744B2 - Synthetic resin cap - Google Patents

Synthetic resin cap Download PDF

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JP5973744B2
JP5973744B2 JP2012028311A JP2012028311A JP5973744B2 JP 5973744 B2 JP5973744 B2 JP 5973744B2 JP 2012028311 A JP2012028311 A JP 2012028311A JP 2012028311 A JP2012028311 A JP 2012028311A JP 5973744 B2 JP5973744 B2 JP 5973744B2
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synthetic resin
screw
resin cap
cap
peripheral wall
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JP2013163543A (en
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敦士 塙
敦士 塙
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Kose Corp
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Kose Corp
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Description

本発明は、化粧料容器の口部を閉止するための合成樹脂キャップに関する。   The present invention relates to a synthetic resin cap for closing a mouth of a cosmetic container.

従来、容器口部を閉止するための合成樹脂キャップは、合成樹脂材料を金型により圧縮成形することにより製造されている。具体的には、キャップの外面を成形する外面用金型とキャップの内面を成形する内面用金型の隙間に溶融状体の合成樹脂材料を充填して硬化させ、外面用金型を取り外すとともに、内面用金型をキャップから強制的に引き抜くことで、完成したキャップを得る。   Conventionally, a synthetic resin cap for closing a container mouth is manufactured by compression molding a synthetic resin material with a mold. Specifically, the gap between the outer surface mold that molds the outer surface of the cap and the inner surface mold that molds the inner surface of the cap is filled with a synthetic resin material of a molten material and cured, and the outer surface mold is removed. The completed cap is obtained by forcibly pulling out the inner mold from the cap.

ところで、一般に飲料用容器などに使用される合成樹脂キャップでは、キャップ内周面に形成されたネジ部の一部を縦溝状に切り欠いてネジ部を周方向に分割し、容器内のガス抜き用のいわゆるベントスロットを形成することが行われている(特許文献1、特許文献2)。かかるベントスロットは、そもそもガス抜きの目的で設けられているものであるが、ネジ部を分割して非連続とすることにより、成形時に内面用金型をキャップから引き抜く際、キャップが拡径方向に変形し、取り外し作業が容易になるという利点もあった。   By the way, in a synthetic resin cap generally used for a beverage container or the like, a part of a screw portion formed on the inner peripheral surface of the cap is cut into a vertical groove shape to divide the screw portion in the circumferential direction, and the gas in the container A so-called vent slot for punching is formed (Patent Document 1 and Patent Document 2). This vent slot is originally provided for the purpose of degassing, but by dividing the threaded portion and making it non-continuous, when the inner mold is pulled out from the cap during molding, the cap expands in the diameter direction. There was also an advantage that the removal work becomes easy.

しかしながら、かかるネジ部とベントスロットとの関係によっては、製造時あるいは使用時において以下の問題が生じるおそれがあった。すなわち、ネジ部の周方向長さを長く、一方、ベントスロットの周方向長さを短くした場合、使用時のネジの締め付け力は向上するものの、製造時に内面の金型を引き抜く際、キャップの拡径方向に変形が生じにくく、型から抜けにくい場合があり、無理に引き抜くとネジ部が変形するなどの成形不良が生じる可能性があった。また、ネジ部の周方向長さを短く、一方、ベントスロットの周方向長さを長くした場合、成形型からの抜きやすさは向上するものの、使用時におけるネジの締め付け力が低下するおそれがあった。   However, depending on the relationship between the threaded portion and the vent slot, the following problems may occur during manufacture or use. In other words, when the circumferential length of the screw part is increased while the circumferential length of the vent slot is shortened, the tightening force of the screw during use is improved, but when the inner mold is pulled out during manufacture, the cap Deformation hardly occurs in the diameter-expanding direction, and it may be difficult to remove from the mold, and if it is forcibly pulled out, there may be a molding defect such as deformation of the screw part. Also, if the circumferential length of the threaded portion is shortened while the circumferential length of the vent slot is increased, the ease of pulling out from the mold is improved, but the screw tightening force during use may be reduced. there were.

さらに、化粧料などの容器で本体の素材をガラスとした場合、加工の寸法精度が合成樹脂と比べて劣るため、閉栓時のキャップによる封止が不十分な場合があり、従来の飲料用キャップの構造では十分な密閉を保てないおそれがあった。   In addition, if the body material is made of glass in a container such as cosmetics, the dimensional accuracy of processing is inferior to that of synthetic resin, so sealing with a cap at the time of closure may be insufficient, and conventional beverage caps With this structure, there is a possibility that sufficient sealing cannot be maintained.

特開2003−261155JP 2003-261155 A 特開平10−1150JP-A-10-1150

本発明は、従来の合成樹脂キャップのかかる欠点を克服し、成形時に型から抜きやすく、また、締め付け力についても低下のおそれがなく、更に十分な密閉度を保てる合成樹脂キャップを提供するものである。   The present invention provides a synthetic resin cap that overcomes the drawbacks of conventional synthetic resin caps, is easy to be removed from the mold during molding, and that there is no risk of lowering the clamping force, and that can maintain a sufficient degree of sealing. is there.

本発明は、上記課題を解決するものであり、天板部とその周縁より垂下した周壁部とを備え、該周壁の内面には容器口部と螺合可能に形成されたネジ部を有し、該ネジ部はネジ山を設けない非ネジ部と周方向に交互に配設されるように形成されており、さらに、ネジ部と非ネジ部の周方向長さが同一になるように形成された合成樹脂キャップである。   The present invention solves the above-described problem, and includes a top plate portion and a peripheral wall portion that hangs down from the periphery thereof, and an inner surface of the peripheral wall has a screw portion that can be screwed to the container mouth portion. The threaded portion is formed so as to be alternately arranged in the circumferential direction with the non-threaded portion not provided with the thread, and further, the circumferential length of the threaded portion and the non-threaded portion is formed to be the same. Synthetic resin cap.

本発明の合成樹脂キャップによれば、ネジ部と非ネジ部の周方向長さが同一になるよう形成したことにより、成形型からの抜きやすさの向上と、使用時におけるネジの締め付け力の低下防止とを両立することができる。   According to the synthetic resin cap of the present invention, since the circumferential length of the threaded portion and the non-threaded portion is the same, the ease of pulling out from the mold and the tightening force of the screw during use are improved. Both reduction prevention can be achieved.

また、本発明の合成樹脂キャップの天板部裏面にリブを設けたものは、天板部裏面にパッキンを容易に取り付け可能であり、容器本体の素材にかかわらず高い密閉性を維持することができる。   In addition, the synthetic resin cap of the present invention having a rib on the back of the top plate can easily attach a packing to the back of the top plate, and can maintain high sealing performance regardless of the material of the container body. it can.

本発明に係る合成樹脂キャップのA−A’断面図A-A 'sectional view of a synthetic resin cap according to the present invention 本発明に係る合成樹脂キャップの底面図Bottom view of the synthetic resin cap according to the present invention 本発明に係る合成樹脂キャップにパッキンを取り付けた状態の一部拡大断面図The partially expanded sectional view of the state which attached the packing to the synthetic resin cap which concerns on this invention 本発明に係る合成樹脂キャップの可視光線透過率をあらわすグラフGraph showing the visible light transmittance of the synthetic resin cap according to the present invention

以下、本発明に係る合成樹脂キャップの実施の形態の例について、図面を参照しつつ詳細に説明する。   Hereinafter, an example of an embodiment of a synthetic resin cap according to the present invention will be described in detail with reference to the drawings.

図1は本発明の合成樹脂キャップのA−A’断面図、図2は本発明の合成樹脂キャップの底面図である。図中、1は合成樹脂キャップ、11は天板部、12は周壁、13はネジ部、14はネジ山、15は非ネジ部、16はリブ部、161は突出部をそれぞれ示す。   FIG. 1 is a cross-sectional view of the synthetic resin cap of the present invention, taken along the line A-A ′, and FIG. In the figure, 1 is a synthetic resin cap, 11 is a top plate portion, 12 is a peripheral wall, 13 is a screw portion, 14 is a screw thread, 15 is a non-screw portion, 16 is a rib portion, and 161 is a protruding portion.

図1に示すように、本発明の合成樹脂キャップ1は、天板部11とその周縁より垂下した周壁12を備え、該周壁12の内周面には容器口部と螺合可能に形成されたネジ部13を有している。かかるネジ部13は、非ネジ部15によって周方向に分割されている。   As shown in FIG. 1, the synthetic resin cap 1 of the present invention includes a top plate portion 11 and a peripheral wall 12 that hangs down from the peripheral edge thereof, and is formed on the inner peripheral surface of the peripheral wall 12 so as to be screwable with a container mouth portion. And has a threaded portion 13. The screw portion 13 is divided in the circumferential direction by the non-screw portion 15.

本実施態様のネジ部13は、周壁12の他の部分よりも肉厚に形成された矩形の周壁部分にネジ山14を上下二段で突設して形成されている。かかるネジ部13は、周壁12の内周面に非連続に複数箇所設けられ、隣接するネジ部13との間には、ネジ山14が形成されていない非ネジ部15が形成されている。このように、合成樹脂キャップ1の内周面には、複数のネジ部13と非ネジ部15とが、周方向に交互に配設されるように形成されている。   The screw portion 13 of this embodiment is formed by projecting a screw thread 14 in two upper and lower stages on a rectangular peripheral wall portion formed thicker than other portions of the peripheral wall 12. A plurality of such screw portions 13 are provided discontinuously on the inner peripheral surface of the peripheral wall 12, and a non-screw portion 15 in which no screw thread 14 is formed is formed between the adjacent screw portions 13. As described above, the plurality of screw portions 13 and the non-screw portions 15 are formed on the inner peripheral surface of the synthetic resin cap 1 so as to be alternately arranged in the circumferential direction.

ネジ部13は他の周壁12と同じ厚さとしても良いが、本実施態様のように非ネジ部15に対して肉厚に形成することによって、ネジ山14の強度が向上し、キャップを金型から引き抜く際にネジ山14の変形・歪曲を最小限にとどめることができるため、好ましい。さらに、非ネジ部15部分の周壁12はネジ部13に対して肉薄に形成することにより、金型から引き抜く際にキャップが拡径方向に変形しやすく、金型からの取り外しが容易になるため好ましい。   The screw portion 13 may have the same thickness as the other peripheral walls 12, but by forming the screw portion 13 thicker than the non-screw portion 15 as in this embodiment, the strength of the screw thread 14 is improved and the cap is made of gold. This is preferable because the deformation and distortion of the screw thread 14 can be minimized when being pulled out from the mold. Furthermore, by forming the peripheral wall 12 of the non-threaded portion 15 thin with respect to the threaded portion 13, the cap is easily deformed in the diameter-expanding direction when being pulled out from the mold, and the removal from the mold is facilitated. preferable.

図2に示すように、本発明の合成樹脂キャップ1は、ネジ部13の周方向長さW1と非ネジ部15の周方向長さW2の長さが互いに同一になるように形成されている。このように、ネジ部13の周方向長さW1と非ネジ部15の周方向長さW2とを同一に形成することにより、成形時に内面用金型をキャップから引き抜く際、キャップが拡径方向に適度に変形して抜きやすく、また、使用時におけるネジの締め付け力についても十分に維持することができる。   As shown in FIG. 2, the synthetic resin cap 1 of the present invention is formed such that the circumferential length W1 of the screw portion 13 and the circumferential length W2 of the non-screw portion 15 are the same. . Thus, by forming the circumferential length W1 of the threaded portion 13 and the circumferential length W2 of the non-threaded portion 15 in the same manner, when the inner mold is pulled out from the cap during molding, the cap expands in the diameter increasing direction. It can be easily deformed and removed easily, and the tightening force of the screw during use can be sufficiently maintained.

ネジ部13および非ネジ部15は、互いの周方向長さが同一になるように形成されていれば設ける数について特段の制限はないが、合成樹脂キャップ1の内周面にそれぞれ6〜12箇所の範囲で設けるのが好ましく、特に、本実施態様のように8箇所ずつ設けるのが望ましい。   There is no particular limitation on the number of the screw part 13 and the non-screw part 15 provided that the circumferential lengths thereof are the same. It is preferable to provide in a range of locations, and in particular, it is desirable to provide 8 locations as in this embodiment.

また、非ネジ部15の上部にはパッキンを取り付けるためのリブ部16を設けても良い。図3に示すように、かかるリブ部16は、非ネジ部15の上部周壁12より合成樹脂キャップ1の中心方向に突出して形成され、その下部には他のリブ部16部分よりも合成樹脂キャップ1の中心方向に更に突出して形成された突出部161を有する。そして、本実施態様の合成樹脂キャップ1に取り付けられるパッキン2は、リブ部16のキャップ中心方向への突出高さを差し引いたキャップ内径φ1と同一ないしやや大きめの円板状に形成されている。合成樹脂キャップ1へのパッキン2の取り付けは、キャップの開口側からパッキン2を挿入し、突出部161を乗り越えて突出部161の上部のリブ部16の部分まで押し込めばよい。これにより、パッキン2はリブ部16に周縁部が保持されるとともに、突出部161に阻止されて容易に外れることなく天板部11の裏面に維持されるため、接着やその他の固定手段によることなくパッキン2を容易に取り付けることができる。上記のリブ部16は1箇所の非ネジ部15に対し1箇所ずつ設けることが好ましいが、パッキン2を固定維持するのに十分であれば、例えば、2箇所の非ネジ部15に対し1箇所ずつリブ部16を設けてもよい。   A rib portion 16 for attaching a packing may be provided on the upper portion of the non-screw portion 15. As shown in FIG. 3, the rib portion 16 is formed so as to protrude from the upper peripheral wall 12 of the non-screw portion 15 toward the center of the synthetic resin cap 1, and the synthetic resin cap is formed below the other rib portion 16 portion. 1 has a protruding portion 161 that further protrudes in the center direction. The packing 2 attached to the synthetic resin cap 1 of this embodiment is formed in a disc shape that is the same as or slightly larger than the cap inner diameter φ1 obtained by subtracting the protruding height of the rib portion 16 in the cap center direction. The packing 2 can be attached to the synthetic resin cap 1 by inserting the packing 2 from the opening side of the cap, getting over the protruding portion 161 and pushing it into the rib portion 16 at the upper portion of the protruding portion 161. As a result, the packing 2 is held on the back surface of the top plate portion 11 without being easily removed by being blocked by the protruding portion 161 while the peripheral portion is held by the rib portion 16, and therefore by the bonding or other fixing means The packing 2 can be easily attached. The rib portion 16 is preferably provided one for each non-threaded portion 15, but if it is sufficient to fix and maintain the packing 2, for example, one location for two non-threaded portions 15. You may provide the rib part 16 one by one.

このように、合成樹脂キャップ1の天板部11裏側にパッキン2を取り付けることで、仮に、容器本体の口部の寸法精度に多少の狂いがあった場合でも口部に密着し、十分な気密を維持することができる。かかるパッキン2の素材は、ある程度の弾性を有し、容器内の気密性を維持できるものであれば限定されないが、低発泡ポリエチレンシートが好ましい。   In this way, by attaching the packing 2 to the back side of the top plate portion 11 of the synthetic resin cap 1, even if there is a slight deviation in the dimensional accuracy of the mouth portion of the container body, the mouth portion is in close contact with the mouth portion. Can be maintained. The material of the packing 2 is not limited as long as it has a certain degree of elasticity and can maintain the airtightness in the container, but a low foam polyethylene sheet is preferable.

合成樹脂キャップ1は、その素材としてポリプロピレン、ポリエチレンテレフタレート
等を使用することができる。また、キャップ全体を着色したものは無着色のものに比べて可視光線の透過率が低くなり、特に、黒着色したものは光線の透過率が極めて低くなり、内容物の化粧料等に対する外光の影響を軽減できるため好ましい。さらに、合成樹脂キャップ1にパッキン2を取り付けた場合は、取り付けない場合と比較して光線の透過率はより低くなるため好ましい。
The synthetic resin cap 1 can use polypropylene, polyethylene terephthalate, or the like as its material. In addition, the colored cap as a whole has a lower visible light transmittance than the uncolored one, and especially the black colored one has a very low light transmittance. This is preferable because the influence of the above can be reduced. Furthermore, it is preferable to attach the packing 2 to the synthetic resin cap 1 because the light transmittance is lower than when the packing 2 is not attached.

次に、実施例を挙げ、本発明を更に詳しく説明する。   Next, the present invention will be described in more detail with reference to examples.

実施例
本発明に係る合成樹脂キャップであって、全体を白着色したものと黒着色したものとを用意し、それぞれパッキンを取り付けた状態と取り付けていない状態において、以下の条件で可視光線透過率を測定した。結果を図4に示す。
Example Synthetic resin caps according to the present invention, which are prepared with white and black coloring as a whole, and in the state where the packing is attached and the state where the packing is not attached, respectively, and visible light transmittance under the following conditions: Was measured. The results are shown in FIG.

<使用機器>
紫外可視吸光光度計:UV-2500PC(株式会社島津製作所)
積分球反射付属装置:ISR-260(株式会社島津製作所)
<測定条件>
測定値:透過率
スキャン速度:中速
スリット幅:5.0nm
サンプリングピッチ:0.5nm
測定温度:室温
<Devices used>
UV-Vis spectrophotometer: UV-2500PC (Shimadzu Corporation)
Integrating sphere reflector: ISR-260 (Shimadzu Corporation)
<Measurement conditions>
Measured value: Transmittance Scanning speed: Medium speed Slit width: 5.0nm
Sampling pitch: 0.5nm
Measurement temperature: room temperature

図4の結果より分かるとおり、白着色のものに比べ、黒着色のものが著しく可視光線透過率が低いことが分かった。また、同色ものでも、パッキン付きとパッキン無しのものとでは、パッキン付きのものの方が、より透過率が低いことが分かった。たとえば、白着色のパッキン無しのものは、化粧料の成分のひとつであるコウジ酸が黄変する透過率の基準値よりも上回ることが確認されたが、一方、同色のパッキン付のものでは、当該基準値よりも下回ることが確認された。   As can be seen from the results of FIG. 4, it was found that the visible light transmittance was significantly lower in the black colored one than in the white colored one. Further, it was found that the same color of the one with packing and the one without packing had a lower transmittance. For example, it was confirmed that the white coloring without packing was higher than the standard value of the transmittance of kojic acid, which is one of the components of cosmetics, while the one with packing of the same color, It was confirmed that it was lower than the reference value.

1………合成樹脂キャップ
2………パッキン
11………天板部
12………周壁
13………ネジ部
14………ネジ山
15………非ネジ部
16………リブ部
161………突出部
W1………ネジ部の周方向長さ
W2………非ネジ部の周方向長さ
φ1………リブ部のキャップ中心方向への突出高さを差し引いたキャップ内径
DESCRIPTION OF SYMBOLS 1 ... …… Synthetic resin cap 2 ......... Packing 11 ......... Top plate part 12 ......... Perimeter wall 13 ......... Screw part 14 ......... Screw thread 15 ......... Non-screw part 16 ......... Rib part 161 ......... Projection part W1 ......... Circumferential length of the screw part W2 ......... Circumferential length of the non-screw part φ1 ... ... Cap inner diameter obtained by subtracting the projection height of the rib part toward the cap center

Claims (4)

天板部とその周縁より垂下した周壁部とを備え、該周壁の内周面には容器口部と螺合可能に形成されたネジ部を有し、該ネジ部はネジ山を設けない非ネジ部と周方向に交互に配設されるようにそれぞれ6箇所ないし12箇所形成されており、さらに、ネジ部と非ネジ部の周方向長さが同一になるように形成されるとともに、前記非ネジ部の上部にはキャップの中心方向に突設するリブ部を縦方向に延伸するように設けたことを特徴とする合成樹脂キャップ。 A top plate portion and a peripheral wall portion that hangs down from the periphery of the top plate portion, and an inner peripheral surface of the peripheral wall has a screw portion that can be screwed to the container mouth portion, and the screw portion is not provided with a thread. it six absence each to be disposed alternately in the threaded portion and the circumferential direction are formed 12 places, further, is formed so as circumferential length of the threaded portion and the unthreaded portion is equal Rutotomoni, wherein A synthetic resin cap characterized in that a rib portion projecting in the center direction of the cap is provided on the upper portion of the non-screw portion so as to extend in the vertical direction . 前記ネジ部は、非ネジ部に対し肉厚に形成されている周壁部と該周壁部に形成されたネジ山からなることを特徴とする請求項1に記載の合成樹脂キャップ。   2. The synthetic resin cap according to claim 1, wherein the screw portion includes a peripheral wall portion formed thicker than a non-screw portion and a screw thread formed on the peripheral wall portion. 前記リブにはキャップの中心方向に更に突出する突出部が形成され、該突出部により天板部の裏面にパッキンを取付たことを特徴とする請求項1または2に記載の合成樹脂キャップ。 The synthetic resin cap according to claim 1 or 2 , wherein a protruding portion that further protrudes in a center direction of the cap is formed on the rib portion , and a packing is attached to the back surface of the top plate portion by the protruding portion . 前記合成樹脂キャップの全体が黒色に着色されたことを特徴とする請求項1ないし3のいずれか1項に記載の合成樹脂キャップ。   The synthetic resin cap according to any one of claims 1 to 3, wherein the entire synthetic resin cap is colored black.
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JP2015227179A (en) * 2014-05-30 2015-12-17 株式会社吉野工業所 Bottle cap
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