JP2004091023A - Cap with intermittent screw - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cap with an intermittent screw which prevents intrusion of water drop in the cap during shower cooling, enables easy removal and dry of intrusion water drop, is easily used since opening and closing torque is relatively low, hardly loosens during delivery and storage and can reduce an amount of a resin. <P>SOLUTION: In a plastic-made cap screwed on a spout of a container to seal, a plurality of vertical groove-shaped missing portions 122 are formed from the uppermost screw to the lowermost screw at an same interval in a circumferential direction in threads of a female screw 121 mounted in the inward surface of the circumferential wall 120 of the cap 100. <P>COPYRIGHT: (C)2004,JPO

Description

【０００１】
【発明の属する技術分野】
本発明は、液体内容物を高温充填したのちにシャワー冷却する容器、低トルクで開閉したい容器、樹脂量を削減したい容器などの注出口部に螺合して使用する断続ネジ付キャップに関するものである。
【０００２】
【従来の技術】
従来、液体用紙容器の注出位置に取り付けられたスパウト、パウチの注出位置に取り付けられたスパウト、プラスチックボトルの口頸部などに螺合して使用するキャップは、通常、周壁内周面に設ける雌ネジ部のネジ山が、上端から下端まで連続したものであった。
【０００３】
【発明が解決しようとする課題】
しかしながら、上述した従来のネジ山が上端から下端まで連続する連続ネジ付キャップにおいては、内容物を高温充填後にシャワー冷却するときに、キャップの周壁内周面と容器の注出口部の外周面との間に、減圧状態の発生により冷却シャワーの水滴が混入し、その混入した水滴が排出されず乾かずに残留することがあった。また、キャップを取り外すときの初期の開けトルクは大きいが、途中でトルクダウンすることがあり、流通や保管過程で振動や落下衝撃などによってキャップが緩むことなどがあった。
【０００４】
本発明は、上述の従来のキャップの問題を解決するものであり、シャワー冷却時のキャップ内への水滴の混入を防ぎ、混入した水滴を排除し易く又は乾燥し易く、開閉トルクが比較的に低く使用し易く、流通や保存中に緩みにくく、また、樹脂量を削減可能な断続ネジ付キャップを提供するものである。
【０００５】
【課題を解決するための手段】
すなわち、本発明は、容器の注出口部を螺着して封止するプラスチック製のキャップであって、前記キャップの周壁内周面に設ける雌ネジのネジ山に、最上方ネジから最下方ネジへ縦溝状の欠落箇所を、周方向に等間隔で複数箇所に設けたことを特徴とする断続ネジ付キャップである。
【０００６】
【作用】
本発明の断続ネジ付キャップを注出口部に螺着した容器は、液体内容物を高温充填したのちのシャワー冷却工程において、キャップの周壁内周面と容器の注出口部の外周面との間の空間の空気が冷却により収縮して減圧状態になり、キャップの周壁の下端と容器の注出口部との間隙から水滴が介在する空気を吸引しても、キャップの周壁内周面に設けられている雌ネジのネジ山に、最上方ネジから最下方ネジへ縦溝状の欠落箇所が周方向に等間隔で複数箇所に設けられているため、この縦溝状の欠落箇所を通過するときに、比重の違いから水滴より空気が上方へ吸い上げられやすく、混入した水滴もこの縦溝状の欠落箇所によって排除されやすく、また、乾燥されやすい。
【０００７】
また、本発明の断続ネジ付キャップは、雌ネジのネジ山に複数の欠落箇所があるため、容器の注出口部の雄ネジのネジ山との摺接面積が少なくなり、キャップの開閉トルクが比較的に低くなり、開けやすく閉めやすいキャップである。また、雌ネジのネジ山に欠落箇所があり、容器の注出口部の雄ネジのネジ山と断続的に接触して手で掌握するようにロックするため、流通や保存中に緩みにくい。また、雌ネジのネジ山に複数の欠落箇所を設けるので、使用する樹脂量を削減することができる。
【０００８】
【発明の実施の形態】
次に、本発明の断続ネジ付キャップの実施の形態について、図を用いて詳細に説明する。
図１（ａ）は、本発明の一実施形態の断続ネジ付キャップの断面図であり、図１（ｂ）は、そのＡ−Ａ’矢視底面図である。図２は、図１（ａ）の断続ネジ付キャップをスパウトに螺着した口栓の断面図であり、図３は、図１（ａ）の断続ネジ付キャップを頂部傾斜板に突設する液体用紙容器の斜視図である。
【０００９】
一実施形態の本発明の断続ネジ付キャップは、液体内容物を高温充填したのちにシャワー冷却する容器の注出口部に螺着するキャップであり、例えば、図３に示すように、胴部（２１）の外観が四角柱状の液体用紙容器（２０）の頂部傾斜板（２２）に、超音波シール法などで内付け又は外付けで熱融着して突設するスパウト（２００）（注出口部）に螺合させて、口栓（１０）として使用するものである。このキャップ（１００）の構造は、図２に示すように、天板（１１０）下面にスパウト（２００）の注出筒（２２０）の口部（上端部）を封止するためのコンタクト封止リング（１１１）（先端を口部の天面に密接）やインナー封止リング（１１２）（内周面を口部の内周面に密接）を設けるものであり、そして、図１（ａ）及び（ｂ）に示すように、周壁（１２０）の内周面に設けるスパウトの雄ネジと螺合する雌ネジ（１２１）のネジ山に、最上方ネジから最下方ネジへ縦溝状の欠落箇所（１２２）を周方向に等間隔で複数箇所、例えば６箇所に設けるものである。また、スパウト（２００）の構造は、図２に示すように、下端外周に容器と熱融着するフランジ（２４０）を周設する環状台座部（２１０）の上面内周縁部に、外周面にキャップ（１００）との雄ネジ（２２１）をもつ注出筒（２２０）を立設し、この注出筒の内側下方を封鎖板（２３０）を設けて封鎖し、この封鎖板の下面に垂直断面がＶ字状の環状切込み（２３１）を設けて下面の開口予定位置に環状薄肉脆弱線（２３２）を形成し、環状切込みの内側近傍の上面の一側に、先端にプルリング（２３４）を接続する支柱（２３３）を立設するものである。
【００１０】
なお、発明者らは、シャワー冷却時のキャップの周壁内周面とスパウト外周面との間への水滴の混入状態に関して、上述の断続ネジ付キャップをスパウトに螺着した口栓と従来の連続ネジ付キャップをスパウトに螺着した口栓とにつて比較評価を行った。断続ネジ付キャップと連続ネジ付キャップとは、ネジ山の欠落箇所の有無だけ異なるものであり、キャップの外径は、２４．４ｍｍで、高さは、１６ｍｍで、断続ネジ付キャップの欠落箇所の幅は、２ｍｍであった。評価方法は、まず、口栓を９０℃の湯上にキャップの下端まで浸漬して１分間正立放置し、次に、１５℃の水道蛇口シャワーで、約１０リットル／ｍｉｎの量で１０分間冷却したのち、キャップの周壁内周面とスパウト外周面との間への水滴の混入状態を調べるものである。この評価結果を表１に示す。なお、キャップの周壁下端とスパウトの環状台座部上面との隙間は、０．０ｍｍ、０．１ｍｍ、０．３ｍｍの３段階で行った。
【００１１】
【表１】

【００１２】
評価結果は、表１に示すように、本発明の断続ネジ付キャップは、キャップ下の隙間を０．３ｍｍ以下にすれば、ネジ中間部より上方へは水滴の混入を避けることができる。一方、従来の連続ネジ付キャップでは、キャップ下の隙間を０．３ｍｍ以下にしても、ネジ上部に水滴の混入するものがあった。
【００１３】
次に、シャワー冷却時のキャップの周壁内周面とスパウト外周面との間への混入した水滴の乾燥状態に関して、上述の断続ネジ付キャップをスパウトに螺着した口栓と従来の連続ネジ付キャップをスパウトに螺着した口栓とにつて比較評価を行った。評価方法は、水滴をスパウトの中央部に２滴落としてキャップをし、室温が昼間２２℃、夜間１７℃、湿度が昼間４５〜５５％、夜間５５〜６０％の室内に放置して、水滴の乾燥状態を調べるものである。この評価結果を表２に示す。
【００１４】
【表２】

【００１５】
評価結果は、表２に示すように、本発明の断続ネジ付キャップは、キャップ下の隙間の大きさに関係なく２４時間後には水滴が完全に乾燥し、隙間が０．３ｍｍでは１２時間後には水滴が完全に乾燥した。一方、従来の連続ネジ付キャップでは、キャップ下の隙間の大きさが０．３ｍｍでも水滴の完全乾燥が３０時間かかり、キャップ下の隙間が０，０ｍｍ（隙間無し）の場合には、７２時間でも水滴は完全乾燥しなかった。
【００１６】
なお、本発明の断続ネジ付キャップは、上述した液体用紙容器の注出位置に取り付けられたスパウトに螺着して使用するだけでなく、軟質包装材料のパウチの注出位置に取り付けられたスパウトに螺着して使用してもよく、また、プラスチックボトルの口頸部に螺着して使用することもできる。
【００１７】
【発明の効果】
本発明の断続ネジ付キャップは、雌ネジのネジ山に最上方ネジから最下方ネジへ縦溝状の欠落箇所が周方向に等間隔で複数箇所に設けられており、この欠落箇所の作用効果により、シャワー冷却時のキャップ内への水滴の混入を防ぎ、混入した水滴を排除し易く、また、混入した水滴が乾燥しやすい。
【００１８】
また、本発明の断続ネジ付キャップは、雌ネジのネジ山に欠落箇所が複数箇所設けられているため、開閉トルクが比較的に低くなり、使用時の螺脱又は螺着がしやすく、しかも、流通や保存中に緩みにくく、また、キャップの樹脂量を削減することができる。
【図面の簡単な説明】
【図１】（ａ）は、本発明の一実施形態の断続ネジ付キャップの断面図であり、（ｂ）は、そのＡ−Ａ’矢視底面図である。
【図２】図１に示す断続ネジ付キャップを、スパウトに螺着した口栓の断面図である。
【図３】図２に示す口栓を、頂部傾斜板に突設する液体用紙容器の斜視図である。
【符号の説明】
２０……液体用紙容器
２１……胴部
２２……頂部傾斜板
１００……キャップ
１１０……天板
１１１……コンタクト封止リング
１１２……インナー封止リング
１２０……周壁
１２１……雌ネジ
１２２……欠落箇所
２００……スパウト
２１０……環状台座部
２２０……注出筒
２２１……雄ネジ
２３０……封鎖板
２３１……環状切込み
２３２……環状薄肉脆弱線
２３３……支柱
２３４……プルリング
２４０……フランジ[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a cap with an intermittent screw which is screwed to a spout of a container for cooling a shower after filling a liquid content at a high temperature and then opening and closing with a low torque, a container for reducing the amount of resin, and the like. is there.
[0002]
[Prior art]
Conventionally, a spout attached to the pouring position of the liquid paper container, a spout attached to the pouring position of the pouch, and a cap screwed onto the mouth and neck of a plastic bottle are usually attached to the inner peripheral surface of the peripheral wall. The thread of the female screw portion provided was continuous from the upper end to the lower end.
[0003]
[Problems to be solved by the invention]
However, in the conventional threaded cap in which the conventional thread is continuous from the upper end to the lower end, when shower cooling after filling the contents at a high temperature, the inner peripheral surface of the peripheral wall of the cap and the outer peripheral surface of the spout portion of the container. During this time, water drops from the cooling shower were mixed due to the occurrence of a reduced pressure, and the mixed water drops were not discharged and remained without drying. Further, although the opening torque at the time of removing the cap is large at the initial stage, the torque may be reduced on the way, and the cap may be loosened due to vibration or drop impact during the distribution or storage process.
[0004]
The present invention solves the above-mentioned problem of the conventional cap, prevents water droplets from being mixed into the cap during shower cooling, easily removes the mixed water droplets, or is easy to dry, and the opening and closing torque is relatively high. An object of the present invention is to provide a cap with an intermittent screw which is low in use, easy to loosen during distribution and storage, and capable of reducing the amount of resin.
[0005]
[Means for Solving the Problems]
That is, the present invention relates to a plastic cap for screwing and sealing a spout portion of a container, wherein a female screw thread provided on an inner peripheral surface of a peripheral wall of the cap has a thread from a highest screw to a lowest screw. A cap with an intermittent screw, wherein a plurality of vertical groove-shaped missing portions are provided at equal intervals in a circumferential direction.
[0006]
[Action]
The container in which the cap with the intermittent screw of the present invention is screwed to the spout portion is provided between the inner peripheral surface of the peripheral wall of the cap and the outer peripheral surface of the spout portion of the container in a shower cooling step after hot filling of the liquid content. The air in the space is contracted by cooling to be in a decompressed state, and even if air in which water droplets intervene is sucked from the gap between the lower end of the peripheral wall of the cap and the spout of the container, it is provided on the inner peripheral surface of the peripheral wall of the cap. When the thread passing through the vertical groove-shaped missing portion is provided at a plurality of locations at equal intervals in the circumferential direction from the uppermost screw to the lowermost screw in the thread of the female screw that is provided, In addition, due to the difference in specific gravity, air is more likely to be sucked upward than water droplets, and mixed water droplets are easily removed by the vertical groove-shaped missing portions, and are also easily dried.
[0007]
In addition, the intermittent screw cap of the present invention has a plurality of missing portions in the female screw thread, so the sliding contact area with the male screw thread at the outlet of the container is reduced, and the opening and closing torque of the cap is reduced. The cap is relatively low and easy to open and close. In addition, there is a missing portion in the thread of the female screw, which intermittently contacts the thread of the male screw at the spout of the container and locks it so that it is grasped by hand, so that it is unlikely to loosen during distribution or storage. In addition, since a plurality of missing portions are provided in the thread of the female screw, the amount of resin used can be reduced.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, an embodiment of a cap with an intermittent screw according to the present invention will be described in detail with reference to the drawings.
FIG. 1A is a cross-sectional view of an intermittent screw cap according to an embodiment of the present invention, and FIG. 1B is a bottom view taken along the line AA ′. FIG. 2 is a cross-sectional view of a plug in which the intermittent screw cap of FIG. 1 (a) is screwed to a spout, and FIG. 3 projects the intermittent screw cap of FIG. 1 (a) on a top inclined plate. It is a perspective view of a liquid paper container.
[0009]
The intermittent screw cap of the present invention in one embodiment is a cap which is screwed to a spout of a container for cooling the shower after the liquid content is filled at a high temperature. For example, as shown in FIG. 21) Spout (200) (spout port) which is heat-sealed internally or externally by ultrasonic sealing or the like to the top inclined plate (22) of a liquid paper container (20) having a quadrangular prism shape Part) and used as a plug (10). The structure of the cap (100) is, as shown in FIG. 2, a contact seal for sealing the mouth (upper end) of the spout cylinder (220) of the spout (200) on the lower surface of the top plate (110). A ring (111) (the tip is in close contact with the top surface of the mouth) and an inner sealing ring (112) (the inner peripheral surface is in close contact with the inner peripheral surface of the mouth) are provided, and FIG. And (b), a vertical groove-like cut-out from the uppermost screw to the lowermost screw is formed in the thread of the female screw (121) screwed with the male screw of the spout provided on the inner peripheral surface of the peripheral wall (120). A plurality of locations (122) are provided at equal intervals in the circumferential direction, for example, at six locations. Further, as shown in FIG. 2, the structure of the spout (200) is formed on the inner peripheral edge of the upper surface of an annular pedestal (210) around which a flange (240) for heat-sealing the container is provided on the outer periphery of the lower end. A pouring cylinder (220) having a male screw (221) with the cap (100) is erected, and a sealing plate (230) is provided to seal the lower inside of the pouring cylinder, and is perpendicular to the lower surface of the sealing plate. An annular notch (231) having a V-shaped cross section is provided to form an annular thin-walled weak line (232) at an opening planned position on the lower surface, and a pull ring (234) is provided at one end on one side of the upper surface near the inside of the annular notch. A connecting post (233) is erected.
[0010]
In addition, the present inventors, regarding the mixing state of water droplets between the inner peripheral surface of the peripheral wall of the cap and the outer peripheral surface of the spout at the time of shower cooling, a conventional plug with the above-mentioned intermittent screw cap screwed to the spout and a conventional spout. Comparative evaluation was performed on a plug with a screw cap screwed to a spout. The cap with an intermittent screw and the cap with a continuous screw differ only in the presence or absence of a thread missing portion. The outer diameter of the cap is 24.4 mm, the height is 16 mm, and the cap with an intermittent screw is missing. Was 2 mm in width. The evaluation method was as follows. First, the spout was immersed in hot water at 90 ° C. to the lower end of the cap and allowed to stand upright for 1 minute. Then, a 15 ° C. water faucet shower was used for 10 minutes at a rate of about 10 l / min. After cooling, the state of mixing of water droplets between the inner peripheral surface of the peripheral wall of the cap and the outer peripheral surface of the spout is examined. Table 1 shows the evaluation results. The gap between the lower end of the peripheral wall of the cap and the upper surface of the annular pedestal portion of the spout was set in three stages of 0.0 mm, 0.1 mm, and 0.3 mm.
[0011]
[Table 1]

[0012]
As shown in Table 1, as shown in Table 1, the intermittent screw cap of the present invention can prevent water droplets from entering above the screw intermediate portion if the gap under the cap is set to 0.3 mm or less. On the other hand, in a conventional cap with a continuous screw, even when the gap under the cap is set to 0.3 mm or less, water droplets may enter the upper part of the screw.
[0013]
Next, regarding the dry state of water droplets mixed between the inner peripheral surface of the cap and the outer peripheral surface of the spout at the time of shower cooling, with the spout having the above-described intermittent screw cap screwed to the spout and a conventional continuous screw. Comparative evaluation was performed on a cap with a cap screwed onto a spout. The evaluation method is as follows. Drop two drops of water on the center of the spout and cap it on. The purpose of this study is to examine the dry state of the sushi. Table 2 shows the evaluation results.
[0014]
[Table 2]

[0015]
As shown in the evaluation results, as shown in Table 2, the intermittent screw cap of the present invention showed that the water droplet completely dried after 24 hours regardless of the size of the gap under the cap, and that after 12 hours when the gap was 0.3 mm. The water drops were completely dry. On the other hand, in the conventional continuous screw cap, even if the gap under the cap is 0.3 mm, complete drying of the water droplet takes 30 hours. If the gap under the cap is 0.0 mm (no gap), 72 hours. But the drops did not dry out.
[0016]
The intermittent screw cap of the present invention can be used not only by being screwed onto the spout attached to the pouring position of the liquid paper container described above, but also by using the spout attached to the pouring position of the pouch of the soft packaging material. It can be used by screwing it to the mouth or neck of a plastic bottle.
[0017]
【The invention's effect】
The cap with an intermittent screw of the present invention is provided with a plurality of longitudinal groove-shaped missing portions from the uppermost thread to the lowermost thread at equal intervals in the circumferential direction on the female screw thread. This prevents water droplets from entering the cap during shower cooling, facilitates removal of the mixed water droplets, and facilitates drying of the mixed water droplets.
[0018]
In addition, the cap with the intermittent screw of the present invention is provided with a plurality of missing portions in the thread of the female screw, so that the opening and closing torque is relatively low, and it is easy to unscrew or screw in use, and In addition, the resin does not easily loosen during distribution and storage, and the amount of resin in the cap can be reduced.
[Brief description of the drawings]
FIG. 1A is a cross-sectional view of an intermittent screw cap according to an embodiment of the present invention, and FIG. 1B is a bottom view taken along the line AA ′ of FIG.
FIG. 2 is a cross-sectional view of a plug in which the cap with an intermittent screw shown in FIG. 1 is screwed to a spout.
FIG. 3 is a perspective view of a liquid paper container in which the spout shown in FIG. 2 is projected from a top inclined plate.
[Explanation of symbols]
20 liquid paper container 21 body 22 top inclined plate 100 cap 110 top plate 111 contact sealing ring 112 inner sealing ring 120 peripheral wall 121 female screw 122 ... Missing portion 200... Spout 210... Annular pedestal part 220. 240 ... Flange

Claims (1)

容器の注出口部を螺着して封止するプラスチック製のキャップであって、前記キャップの周壁内周面に設ける雌ネジのネジ山に、最上方ネジから最下方ネジへ縦溝状の欠落箇所を、周方向に等間隔で複数箇所に設けたことを特徴とする断続ネジ付キャップ。A plastic cap for screwing and sealing a spout of a container, wherein a female screw thread provided on the inner peripheral surface of the peripheral wall of the cap has a longitudinal groove-shaped drop from the uppermost screw to the lowermost screw. A cap with an intermittent screw, wherein a plurality of locations are provided at equal intervals in the circumferential direction.

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