JP3579296B2 - Structure of container nozzle with cap loosening prevention mechanism - Google Patents

Structure of container nozzle with cap loosening prevention mechanism Download PDF

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Publication number
JP3579296B2
JP3579296B2 JP15439299A JP15439299A JP3579296B2 JP 3579296 B2 JP3579296 B2 JP 3579296B2 JP 15439299 A JP15439299 A JP 15439299A JP 15439299 A JP15439299 A JP 15439299A JP 3579296 B2 JP3579296 B2 JP 3579296B2
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JP
Japan
Prior art keywords
cap
screw
thread
height
container nozzle
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.)
Expired - Lifetime
Application number
JP15439299A
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Japanese (ja)
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JP2000335609A (en
Inventor
義祐 坂本
博 鳥海
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.)
Toyo Seikan Kaisha Ltd
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Toyo Seikan Kaisha 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
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Priority to JP15439299A priority Critical patent/JP3579296B2/en
Publication of JP2000335609A publication Critical patent/JP2000335609A/en
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Publication of JP3579296B2 publication Critical patent/JP3579296B2/en
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Description

【0001】
【産業上の利用分野】
この発明はキャップが容器ノズル部に締まる方向とは逆方向の回転、つまり容器キャップが緩む方向に回転することを防止するための緩み止め機構付き容器に関するものである。
【0002】
【従来の技術】
ボトルノズル部とキャップのねじ嵌合において、キャップ天面にパッキンを挿入している容器等においては、キャッピング後の時間が経過すると、経時的にキャップの緩みが生じ、これが液洩れの要因となる場合がある。特にパッキンとして発泡樹脂製のものを使用しているポンプ・トリガー容器等においてはその傾向が見られる場合がある。
【0003】
このキャップの経時的な緩みを防ぐために従来はボトルノズル部のねじ部に逆転防止用のラッチを設けることや、或いは逆転トルク増加用の補助ねじを設けることが多いが、逆転トルク増加用の補助ねじを設ける逆転防止技術はラッチを設ける場合に比べて、キャッピングトルクの変化が連続的であるので、円滑なキャッピングが可能であるところから多く使用されている。しかるに従来の補助ねじ方式の緩み止め機構は、図7に示すように、ボトルノズル部の外ねじの下部に補助ねじ31を設け、キャップのねじ山の斜面を押しつけて外ねじを挟みつけて摩擦を増加させて緩みを防ぐもの、図8に示すように、ボトルノズル部に中心線方向に縦のリブ32を設け、キャップねじの端面をこのリブにオーバーラップさせて摩擦を増加させ、緩みを防ぐもの、さらには、図9に示すように、ボトルノズル部の外ねじの下部に補助ねじ33を設け、キャップねじ端面とオーバーラップさせて、緩みを防ぐ等の技術が考えられている。
【0004】
【解決すべき課題】
しかるに上記従来の方法では、容器ノズル部の外ねじの寸法のばらつき、変形及びキャップ寸法のばらつき等で緩み防止の効果が異なる結果となる。すなわち、キャップのねじと補助ねじとの干渉量(オーバーラップ量)が大きい場合は締付に要するトルクが過大となってキャップが完全に締まらないキャッピング不良が生じ、また、オーバーラップ量が小さいと緩み防止の効果が薄い。
【0005】
また、上記従来の方法では、ボトルノズル部の外ねじとキャップのねじが両者の馴みにより経時的に張力が弱くなるクリープ現象により、緩み防止効果が薄れる。
【0006】
この発明は上記の如き事情に鑑みてなされたものであって、長期間にわたって緩み防止効果を保持することができ、キャッピング作業も円滑に行うことができるキャップ緩み止め機構つき容器ノズル部の構造を提供することを目的とするものである。
【0007】
【課題を解決するための手段】
この目的に対応して、この発明のキャップ緩み止め機構つき容器ノズル部の構造は、キャップがねじ嵌合可能な容器ノズル部であって、前記容器ノズル部には、前記ノズル部の中心線の回りに単数条若しくは複数条の外ねじと前記外ねじに沿って第1の補助ねじと第2の補助ねじとを設け、前記第1の補助ねじのねじ山は前記中心線を含む平面による断面の形状が前記キャップの内ねじのねじ山と干渉する高さを有し、かつ前記ねじ山の頂面は前記中心線方向の容器ノズル部の開口部寄りに高さの小さい凹部を有し前記容器ノズル部の基端部寄りに高さの大きい凸部を有し、前記第2の補助ねじのねじ山は前記中心線を含む平面による断面の形状が前記キャップの内ねじのねじ山と干渉する高さを有し、かつ前記ねじ山の頂面は前記中心線方向の容器ノズル部の開口部寄りの高さの方が容器ノズル部の基端部寄りの高さよりも大きくなるような傾斜面をなしていることを特徴としている。
【0008】
【実施例】
以下この発明の詳細を一実施例を示す図面について説明する。
【0009】
図1、図2及び図3において、1はボトルノズル部であり、ボトルノズル部1はボトル本体2の上端に位置し、上端に開口部9を有し下端に基端部10を有する。ボトルノズル部1には中心線7の回りに外ねじ3が形成されている。この外ねじ3は一例としてピッチが4.23mm、巻数が約{1+(3/4)}(有効)である。外ねじ3のねじ山の形状は、中心線7を含む平面での断面形状で開口部9寄りの上辺4よりも基端部10寄りの下辺5の方が急な角度で立ち上がっている。
【0010】
外ねじ3の下には、外ねじ3に沿って第1の補助ねじ6が設けられている。第1の補助ねじ6の範囲は例えば約{1+(2/4)}巻である。
【0011】
第1の補助ねじ6の形状は、中心線7を含む平面での断面形状で頂面13が、開口部9寄りの部分が凹部8になっており、凹部8に接続した基端部10寄りの部分が凸部11になっている。凸部11の頂部と凹部8の底部との差h(図5参照)は例えば約0.45mmである。尚、この実施例では、第1の補助ねじ6を図2、図3に示すように、周方向に間隔を置いて設けているが、間隔を設けずに連続して設けてもよい。
【0012】
さらに、外ねじ3の下において、第1の補助ねじ6が形成されていない部分に、外ねじ3に沿って、第2の補助ねじ12が設けられている。第2の補助ねじ12の形状は、中心線7を含む平面での断面形状で、頂面14が開口部9寄りの部分が高く基端部10寄りの部分が低い斜面になっている。
【0013】
このように構成された緩み止め機構の作用は次の通りである。図4、図5及び図6に示すように、ボトルノズル部1にパッキン22をもつキャップ21を締めて行くと、締め終わりの状態は、キャップ21の内ねじ23が図5の位置すなわち、第1の補助ねじ6の凸部11を越えて第1の補助ねじ6の凹部8に嵌り込む。こうしてキャップ21の内ねじ23が嵌り込むので、従来のボトルノズル部とキャップの嵌合部におけるオーバーラップ寸法(図9のX)とこの発明のオーバーラップ寸法(図5のYまたはZ)とではX=Z(戻しトルクの関係)、X>Y(戻しトルク及び経時変化量)の関係からこの発明のものでは図5に示す通りY寸法をZ寸法より小さく設定できるので、クリープ現象があっても第1の補助ねじ6の凸部11と凹部8との段差は変わらないので、高い戻しトルク値が得られる。しかし第1の補助ねじ6だけの場合はキャップ13を開けるときには、第1の補助ねじ6の凸部11を越えずに凹部8を螺旋し、回転するので戻しトルク値は低く、従来の緩み止め機構と同じ結果になってしまう。
【0014】
しかるに、この発明の機構の場合は、第2の補助ねじ12の頂面14が傾斜面になっていてキャップ21の内ねじ23のねじ山の頂面と接触し、キャップには下方に押される分力が作用し、キャップ21の内ねじ23は戻り回転するときに必ず第1の補助ねじ6の凸部11を乗り越えざるを得ないこととなるので、この凸部11を乗り越えるために高い戻しトルク値が得られる。またこの発明のものでは、キャップ21のねじ山の頂面が第1の補助ねじ6の凹部8に収まっているので、落下時の衝撃にもキャップ21が動き難く、微洩れもない良好なキャップ嵌合を得ることができる。
【0015】
【図面の簡単な説明】
【図1】この発明のキャップ緩め止め機構つき容器口部の構造のボトルノズル部の拡大断面図
【図2】ボトルノズル部の正面図
【図3】ボトルノズル部の側面図
【図4】ボトルノズル部にキャップを嵌合させた状態の拡大断面図
【図5】図4におけるV部断面図
【図6】図4におけるVI部断面図
【図7】従来の緩み止め機構の拡大断面図
【図8】他の従来の緩み止め機構の拡大断面図
【図9】他の従来の緩み止め機構の拡大断面図
【符号の説明】
1 ボトルノズル部
2 ボトル本体
3 外ねじ
4 上辺
5 下辺
6 第1の補助ねじ
7 中心線
8 凹部
9 開口部
10 基端部
11 凸部
12 第2の補助ねじ
13 頂面
14 頂面
21 キャップ
22 パッキン
23 内ねじ
31 補助ねじ
32 リブ
33 補助ねじ
[0001]
[Industrial applications]
The present invention relates to a container with a locking mechanism for preventing rotation of a cap in a direction opposite to a direction in which the cap is fastened to a container nozzle, that is, rotation of the container cap in a loosening direction.
[0002]
[Prior art]
In the screw fitting between the bottle nozzle portion and the cap, in a container or the like in which packing is inserted into the top surface of the cap, if the time after capping elapses, the cap loosens over time, which causes liquid leakage. There are cases. In particular, such a tendency may be observed in a pump / trigger container or the like using a foamed resin as the packing.
[0003]
Conventionally, in order to prevent the cap from loosening over time, a latch for preventing reverse rotation is conventionally provided on the screw portion of the bottle nozzle portion, or an auxiliary screw for increasing reverse rotation torque is often provided. The reverse rotation prevention technology in which a screw is provided is used in many cases because the change in the capping torque is continuous as compared with the case in which a latch is provided, so that smooth capping is possible. However, as shown in FIG. 7, the conventional auxiliary screw type locking mechanism is provided with an auxiliary screw 31 below the external screw of the bottle nozzle portion, presses the slope of the thread of the cap to pinch the external screw, and friction is generated. As shown in FIG. 8, a vertical rib 32 is provided in the center direction of the bottle nozzle, and the end face of the cap screw is overlapped with this rib to increase friction, thereby reducing the looseness. As shown in FIG. 9, there is proposed a technique of providing an auxiliary screw 33 below the outer screw of the bottle nozzle portion and overlapping the end face of the cap screw to prevent loosening.
[0004]
【task to solve】
However, in the above-mentioned conventional method, the effect of preventing loosening is different due to variations in dimensions of the external thread of the container nozzle portion, variations in deformation and variations in cap dimensions, and the like. That is, when the interference amount (overlap amount) between the screw of the cap and the auxiliary screw is large, the torque required for tightening becomes excessive, and a capping defect that the cap is not completely tightened occurs. The effect of preventing loosening is weak.
[0005]
Further, in the conventional method, the creep phenomenon in which the tension of the outer screw of the bottle nozzle portion and the screw of the cap weakens with time due to the familiarity of the two causes the loosening prevention effect to decrease.
[0006]
The present invention has been made in view of the above-described circumstances, and has a structure of a container nozzle portion with a cap loosening prevention mechanism that can maintain a loosening prevention effect for a long time and can smoothly perform capping work. It is intended to provide.
[0007]
[Means for Solving the Problems]
In response to this object, the structure of the container nozzle portion with a cap loosening prevention mechanism of the present invention is a container nozzle portion to which a cap can be screwed, and the container nozzle portion has a center line of the nozzle portion. A single or a plurality of external screws are provided therearound, and a first auxiliary screw and a second auxiliary screw are provided along the external screw, and a thread of the first auxiliary screw has a cross section formed by a plane including the center line. Has a height that interferes with the thread of the internal thread of the cap, and the top surface of the thread has a small-height recess near the opening of the container nozzle in the centerline direction. A convex portion having a large height is provided near a base end portion of the container nozzle portion, and the thread of the second auxiliary screw has a cross-sectional shape formed by a plane including the center line and interferes with the thread of the internal screw of the cap. And the top surface of the thread is aligned with the center line. Towards the container nozzle opening side of the height it is characterized in that it forms a sloped surface that is larger than the proximal end portion side of the height of the container nozzle.
[0008]
【Example】
The details of the present invention will be described below with reference to the drawings showing an embodiment.
[0009]
1, 2 and 3, reference numeral 1 denotes a bottle nozzle. The bottle nozzle 1 is located at the upper end of the bottle body 2, has an opening 9 at the upper end, and has a base end 10 at the lower end. An external screw 3 is formed around the center line 7 in the bottle nozzle portion 1. As an example, the outer screw 3 has a pitch of 4.23 mm and the number of turns is approximately {1+ (3/4)} (effective). The shape of the thread of the outer screw 3 is a sectional shape in a plane including the center line 7, and the lower side 5 near the base end 10 rises at a steeper angle than the upper side 4 near the opening 9.
[0010]
Below the outer screw 3, a first auxiliary screw 6 is provided along the outer screw 3. The range of the first auxiliary screw 6 is, for example, about {1+ (2/4)} turns.
[0011]
The shape of the first auxiliary screw 6 is a cross-sectional shape in a plane including the center line 7, the top surface 13 has a recess 8 near the opening 9, and the base end 10 is connected to the recess 8. Is a convex portion 11. The difference h (see FIG. 5) between the top of the projection 11 and the bottom of the recess 8 is, for example, about 0.45 mm. In this embodiment, the first auxiliary screws 6 are provided at intervals in the circumferential direction as shown in FIGS. 2 and 3, but may be provided continuously without any intervals.
[0012]
Further, a second auxiliary screw 12 is provided along the external screw 3 in a portion below the external screw 3 where the first auxiliary screw 6 is not formed. The shape of the second auxiliary screw 12 is a cross-sectional shape in a plane including the center line 7, and the top surface 14 has a slope that is closer to the opening 9 and lower toward the base end 10.
[0013]
The operation of the locking mechanism configured as described above is as follows. As shown in FIGS. 4, 5 and 6, when the cap 21 having the packing 22 is tightened to the bottle nozzle portion 1, the tightening state is such that the inner screw 23 of the cap 21 is in the position shown in FIG. The first auxiliary screw 6 is fitted into the concave portion 8 of the first auxiliary screw 6 beyond the convex portion 11 of the first auxiliary screw 6. Since the inner screw 23 of the cap 21 fits in this way, the overlap dimension (X in FIG. 9) in the conventional bottle nozzle portion and the fitting portion of the cap is different from the overlap size (Y or Z in FIG. 5) of the present invention. From the relationship of X = Z (relationship of return torque) and X> Y (return torque and amount of change with time), in the case of the present invention, the Y dimension can be set smaller than the Z dimension as shown in FIG. Also, since the step between the convex portion 11 and the concave portion 8 of the first auxiliary screw 6 does not change, a high return torque value can be obtained. However, when only the first auxiliary screw 6 is used, when the cap 13 is opened, the concave portion 8 is spiraled without rotating beyond the convex portion 11 of the first auxiliary screw 6 and rotates. The result is the same as the mechanism.
[0014]
However, in the case of the mechanism of the present invention, the top surface 14 of the second auxiliary screw 12 is inclined and comes into contact with the top surface of the thread of the inner screw 23 of the cap 21 and is pressed downward by the cap. A component force acts, and the inner screw 23 of the cap 21 must be forced to climb over the convex portion 11 of the first auxiliary screw 6 when returning and rotating. A torque value is obtained. Further, according to the present invention, since the top surface of the thread of the cap 21 is accommodated in the concave portion 8 of the first auxiliary screw 6, the cap 21 does not easily move even in the event of a drop, and a good cap without slight leakage. A fit can be obtained.
[0015]
[Brief description of the drawings]
FIG. 1 is an enlarged cross-sectional view of a bottle nozzle having a structure of a container mouth with a cap loosening prevention mechanism according to the present invention. FIG. 2 is a front view of the bottle nozzle. FIG. 3 is a side view of the bottle nozzle. FIG. 5 is an enlarged cross-sectional view of a state in which a cap is fitted to a nozzle portion. FIG. 5 is a cross-sectional view of a V portion in FIG. 4. FIG. 6 is a cross-sectional view of a VI portion in FIG. FIG. 8 is an enlarged cross-sectional view of another conventional locking mechanism. FIG. 9 is an enlarged cross-sectional view of another conventional locking mechanism.
DESCRIPTION OF SYMBOLS 1 Bottle nozzle part 2 Bottle main body 3 Outer screw 4 Upper side 5 Lower side 6 First auxiliary screw 7 Center line 8 Depression 9 Opening 10 Base end 11 Convex part 12 Second auxiliary screw 13 Top surface 14 Top surface 21 Cap 22 Packing 23 Inner screw 31 Auxiliary screw 32 Rib 33 Auxiliary screw

Claims (1)

キャップがねじ嵌合可能な容器ノズル部であって、前記容器ノズル部には、前記ノズル部の中心線の回りに単数条若しくは複数条の外ねじと前記外ねじに沿って第1の補助ねじと第2の補助ねじとを設け、
前記第1の補助ねじのねじ山は前記中心線を含む平面による断面の形状が前記キャップの内ねじのねじ山と干渉する高さを有し、かつ前記ねじ山の頂面は前記中心線方向の容器ノズル部の開口部寄りに高さの小さい凹部を有し前記容器ノズル部の基端部寄りに高さの大きい凸部を有し、前記第2の補助ねじのねじ山は前記中心線を含む平面による断面の形状が前記キャップの内ねじのねじ山と干渉する高さを有し、かつ前記ねじ山の頂面は前記中心線方向の容器ノズル部の開口部寄りの高さの方が容器ノズル部の基端部寄りの高さよりも大きくなるような傾斜面をなしていることを特徴とするキャップ緩み止め機構つき容器ノズル部の構造。
A cap is a container nozzle part which can be screw-fitted, wherein the container nozzle part has one or more external threads around a center line of the nozzle part and a first auxiliary screw along the external thread. And a second auxiliary screw,
The thread of the first auxiliary screw has a height such that the cross-sectional shape of a plane including the center line interferes with the thread of the inner screw of the cap, and the top surface of the thread is oriented in the direction of the center line. A concave portion having a small height near the opening of the container nozzle portion, a convex portion having a large height near the base end portion of the container nozzle portion, and the thread of the second auxiliary screw is the center line. The cross-sectional shape of the plane including the height has a height that interferes with the thread of the internal thread of the cap, and the top face of the thread has a height closer to the opening of the container nozzle portion in the centerline direction. Has a slant surface that is larger than the height of the container nozzle portion near the base end thereof.
JP15439299A 1999-06-01 1999-06-01 Structure of container nozzle with cap loosening prevention mechanism Expired - Lifetime JP3579296B2 (en)

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Publications (2)

Publication Number Publication Date
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JP3579296B2 true JP3579296B2 (en) 2004-10-20

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JP5444672B2 (en) * 2007-09-27 2014-03-19 東レ株式会社 Plug body and medical device having the same
JP5315098B2 (en) * 2009-03-11 2013-10-16 株式会社フレッシュ Bottle set
JP5283736B2 (en) * 2011-08-19 2013-09-04 花王株式会社 Container with cap
JP6444221B2 (en) * 2015-02-27 2018-12-26 株式会社吉野工業所 Delamination container

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