JP2022086922A - Container with screw cap - Google Patents

Abstract

To provide a container with a screw cap, which is provided with an intermittent screw and can suppress a decrease in residual torque when mounted on a container body.SOLUTION: There is provided a container 100 with a screw cap, including: a container body 20 having a cylindrical mouth portion 22 having a male screw portion 22a formed on an outer peripheral surface, a body portion 23 connected to the mouth portion 22 and forming a storage space S for contents, and a bottom portion 25 closing a lower end of the body portion 23; and a screw cap 10 attached to the mouth portion 22 by screw engagement, wherein the screw cap 10 includes a peripheral wall 11 surrounding the mouth portion 22 from outside in a radial direction, and on an inner peripheral surface of the peripheral wall 11, a female screw portion 11a screw-engaged with the male screw portion 22a is provided, and the female screw portion 11a is provided intermittently in a circumferential direction, and a height of a screw at a lower end 11eL of the female screw portion 11a is higher than a height of a screw at an upper end of the female screw portion 11a.SELECTED DRAWING: Figure 2

Description

本開示は、ねじキャップ付き容器に関する。 The present disclosure relates to a container with a screw cap.

従来、例えば特許文献１に記載されるように、外周面に雄ねじが形成された口部を備える容器本体と、当該雄ねじ部にねじ係合可能な雌ねじを内面に形成した周壁を有するねじキャップとを備えた容器であって、当該雌ねじ部として間欠ねじを用いたものが知られている。 Conventionally, as described in Patent Document 1, for example, a container body having a mouth portion having a male screw formed on an outer peripheral surface, and a screw cap having a peripheral wall having a female screw engaging with the male screw portion on the inner surface. A container provided with an intermittent screw is known as the female screw portion.

特開２０１９－１１９４７１号公報JP-A-2019-119471

特許文献１に記載されるような間欠ねじを用いたねじキャップでは、従来の全周にねじ部を設けた場合と比較して、ねじ山同士の接触面積が減少するために残留トルクが減少し、ねじの緩みが生じ易くなってしまう。従って、ねじキャップを蓋体として用いる場合では、十分な残留トルクが得られずに意図せずねじキャップが開放されてしまい、内容物が漏出する可能性があった。またねじキャップでノズル付きポンプを容器本体に固定した場合では、ノズルヘッドを補助キャップから螺脱させるためにノズルヘッドを回転させると、ノズルヘッドの回転に伴ってねじキャップのねじ係合が緩んで前記螺脱が妨げられることがあり、この点において改善の余地があった。 In a screw cap using an intermittent screw as described in Patent Document 1, the residual torque is reduced because the contact area between the threads is reduced as compared with the case where the threaded portion is provided on the entire circumference. , Loosening of screws is likely to occur. Therefore, when the screw cap is used as the lid, the screw cap may be unintentionally opened without obtaining sufficient residual torque, and the contents may leak. When the pump with nozzle is fixed to the container body with a screw cap, when the nozzle head is rotated to screw the nozzle head out of the auxiliary cap, the screw engagement of the screw cap loosens as the nozzle head rotates. The screwing off may be hindered, and there is room for improvement in this respect.

本開示は、前記の現状に鑑み開発されたもので、ねじキャップが間欠ねじを備えつつ、容器本体に装着したときの残留トルクの減少を抑制できる、ねじキャップ付き容器を提供することを目的とする。 The present disclosure has been developed in view of the above-mentioned current situation, and an object of the present invention is to provide a container with a screw cap, which can suppress a decrease in residual torque when mounted on a container body while the screw cap is provided with intermittent screws. do.

本開示のねじキャップ付き容器は、
外周面に雄ねじ部が形成された筒状の口部と、前記口部に連なり内容物の収容空間を形成する胴部と、胴部の下端部を閉塞する底部とを有する容器本体と、
前記口部にねじ係合により装着されるねじキャップと
を備えるねじキャップ付き容器であって、
前記ねじキャップは、
前記口部を径方向外側から囲む周壁を備え、
前記周壁の内周面には、前記雄ねじ部にねじ係合する雌ねじ部が設けられ、
前記雌ねじ部は、周方向に間欠的に設けられており、
前記雌ねじ部の下端部におけるねじ山の高さは、前記雌ねじ部の上端部におけるねじ山の高さよりも高いことを特徴とする。 The container with a screw cap of the present disclosure is a container with a screw cap.
A container body having a cylindrical mouth portion having a male screw portion formed on an outer peripheral surface, a body portion connected to the mouth portion to form a storage space for contents, and a bottom portion closing the lower end portion of the body portion.
A container with a screw cap provided with a screw cap attached to the mouth portion by screw engagement.
The screw cap is
A peripheral wall that surrounds the mouth from the outside in the radial direction is provided.
On the inner peripheral surface of the peripheral wall, a female threaded portion that is screw-engaged with the male threaded portion is provided.
The female thread portion is provided intermittently in the circumferential direction, and is provided intermittently.
The height of the thread at the lower end of the female threaded portion is higher than the height of the thread at the upper end of the female threaded portion.

また、本開示のねじキャップ付き容器は、上記構成において、前記雌ねじ部の巻数は１巻以上であることが好ましい。 Further, in the container with a screw cap of the present disclosure, it is preferable that the number of turns of the female screw portion is one or more in the above configuration.

また、本開示のねじキャップ付き容器は、上記構成において、前記雌ねじ部の下端部から上方に向かって半周分のねじ部は、前記雌ねじ部の上端部から下方に向かって半周分のねじ部よりも、同じ周方向位置で比較したときのねじ山の高さが高いことが好ましい。 Further, in the container with a screw cap of the present disclosure, in the above configuration, the threaded portion for half a circumference from the lower end portion of the female screw portion upward is from the threaded portion for half a circumference downward from the upper end portion of the female screw portion. However, it is preferable that the height of the screw thread is high when compared at the same circumferential position.

本開示によれば、ねじキャップが間欠ねじを備えつつ、容器本体に装着したときの残留トルクの減少を抑制できる、ねじキャップ付き容器を提供することができる。 According to the present disclosure, it is possible to provide a container with a screw cap capable of suppressing a decrease in residual torque when the screw cap is attached to a container body while having an intermittent screw.

本開示の一実施形態に係るねじキャップ付き容器の正面図である。It is a front view of the container with a screw cap which concerns on one Embodiment of this disclosure. 本開示の一実施形態に係るねじキャップ付き容器を構成するねじキャップの正面半断面図である。It is a front half sectional view of the screw cap constituting the container with a screw cap which concerns on one Embodiment of this disclosure. 本開示の一実施形態に係るねじキャップ付き容器を構成するねじキャップの底面図である。It is a bottom view of the screw cap which constitutes the container with screw cap which concerns on one Embodiment of this disclosure. 本開示の一実施形態に係るねじキャップ付き容器を構成するねじキャップによって、ポンプを構成するシリンダが容器本体に装着された状態を示す正面断面図である。FIG. 3 is a front sectional view showing a state in which a cylinder constituting a pump is mounted on a container body by a screw cap constituting a container with a screw cap according to an embodiment of the present disclosure.

以下、図１から図４を参照して、本開示の一実施形態に係るねじキャップ付き容器１００について詳細に例示説明する。 Hereinafter, the container 100 with a screw cap according to the embodiment of the present disclosure will be exemplified in detail with reference to FIGS. 1 to 4.

なお、本実施形態において、ねじキャップ付き容器１００の上方向とは、図１における上方向であり、下方向とは、図１における下方向である。また、径方向内側とは、中心軸線Ｏ（図１参照）を通り当該中心軸線Ｏに垂直な直線に沿って中心軸線Ｏに近づく方向を意味し、径方向外側とは、当該直線に沿って中心軸線Ｏから遠ざかる方向を意味するものとする。 In the present embodiment, the upward direction of the container 100 with a screw cap is the upward direction in FIG. 1, and the downward direction is the downward direction in FIG. 1. Further, the radial inner side means a direction approaching the central axis O along a straight line perpendicular to the central axis O through the central axis O (see FIG. 1), and the radial outer side means a direction along the straight line. It shall mean the direction away from the central axis O.

図１に示すように、本実施形態に係るねじキャップ付き容器１００は、内容物を収容する収容空間Ｓ（図４参照）を有する容器本体２０と、容器本体２０の口部２２（図４参照）にねじ係合により装着されたねじキャップ１０と、ねじキャップ１０によって口部２２に装着されたポンプ３０と、ポンプ３０から上方に延びるステムに固定されたノズルヘッド４０とを備えている。ノズルヘッド４０には、内容物を噴出させるノズル４１が設けられている。 As shown in FIG. 1, the container 100 with a screw cap according to the present embodiment has a container body 20 having a storage space S (see FIG. 4) for accommodating the contents, and a mouth portion 22 (see FIG. 4) of the container body 20. ) Is provided with a screw cap 10 mounted by screw engagement, a pump 30 mounted on the mouth portion 22 by the screw cap 10, and a nozzle head 40 fixed to a stem extending upward from the pump 30. The nozzle head 40 is provided with a nozzle 41 for ejecting the contents.

図２に示すように、本実施形態に係るねじキャップ付き容器１００を構成するねじキャップ１０は、外周面に雄ねじ部２２ａが形成された口部２２（図４参照）を有する容器本体２０に装着され、口部２２を径方向外側から囲む周壁１１と、周壁１１の上端部を閉塞する天壁１３とを備えている。 As shown in FIG. 2, the screw cap 10 constituting the container 100 with a screw cap according to the present embodiment is attached to a container body 20 having a mouth portion 22 (see FIG. 4) having a male screw portion 22a formed on an outer peripheral surface thereof. A peripheral wall 11 that surrounds the mouth portion 22 from the outside in the radial direction and a top wall 13 that closes the upper end portion of the peripheral wall 11 are provided.

周壁１１の内周面には、口部２２の雄ねじ部２２ａにねじ係合する雌ねじ部１１ａが設けられている。本実施形態において、雌ねじ部１１ａは、図２及び図３に示すように、周方向４箇所に間欠部１１ｂを設けた間欠ねじとして構成されている。図３の例では、１周内における間欠部１１ｂを除いたねじ部の割合は約８０％である。 On the inner peripheral surface of the peripheral wall 11, a female screw portion 11a that is screw-engaged with the male screw portion 22a of the mouth portion 22 is provided. In the present embodiment, the female screw portion 11a is configured as an intermittent screw provided with intermittent portions 11b at four points in the circumferential direction, as shown in FIGS. 2 and 3. In the example of FIG. 3, the ratio of the threaded portion excluding the intermittent portion 11b in one circumference is about 80%.

天壁１３には、図２及び図３に示すように、天壁開口１３ａが設けられている。天壁開口１３ａは平面視で略円形状を備えており、図４に例示するように、この天壁開口１３ａを通して、ポンプ３０のシリンダ３１から上方に向けて立設部を突出させて、ノズルヘッド４０と連結させることができる。 As shown in FIGS. 2 and 3, the top wall 13 is provided with a top wall opening 13a. The top wall opening 13a has a substantially circular shape in a plan view, and as illustrated in FIG. 4, a nozzle is formed by projecting an upright portion upward from the cylinder 31 of the pump 30 through the top wall opening 13a. It can be connected to the head 40.

ねじキャップ１０に設けられた雌ねじ部１１ａは、１条ねじであり、雌ねじ部１１ａを雄ねじ部２２ａに対して中心軸線Ｏ周りに１回転させたときに中心軸線Ｏに沿って進む距離（リード）が、隣り合うねじの距離（ピッチ）に等しい。また、雌ねじ部１１ａの内径は、図２に表れていない雌ねじ部１１ａの上端部（口部２２の雄ねじ部２２ａと係合している部分の上端部）から下方に向かって徐々に小さくなるように形成されている。したがって、図２に示す下端部１１ｅＬの内径が、雌ねじ部１１ａの上端部の内径よりも小さくなるように構成されている。 The female thread portion 11a provided on the screw cap 10 is a single thread, and is a distance (lead) that travels along the central axis O when the female thread portion 11a is rotated once around the central axis O with respect to the male thread portion 22a. Is equal to the distance (pitch) of adjacent screws. Further, the inner diameter of the female screw portion 11a is gradually reduced downward from the upper end portion of the female screw portion 11a (the upper end portion of the portion engaged with the male screw portion 22a of the mouth portion 22) which is not shown in FIG. Is formed in. Therefore, the inner diameter of the lower end portion 11eL shown in FIG. 2 is configured to be smaller than the inner diameter of the upper end portion of the female screw portion 11a.

本実施形態では、雌ねじ部１１ａのねじ部が周方向の全周に形成されていると仮定した場合にそのねじ部の内径が下方に向かって徐々に連続的に小さくなるように構成されている。実際には、本実施形態では雌ねじ部１１ａに間欠部１１ｂを設けているため、間欠部１１ｂを介して隣り合うねじ部の端部同士は、下方側のねじ部の内径の方が小さく形成されている。 In the present embodiment, assuming that the threaded portion of the female threaded portion 11a is formed on the entire circumference in the circumferential direction, the inner diameter of the threaded portion is configured to gradually and continuously decrease downward. .. Actually, in the present embodiment, since the female threaded portion 11a is provided with the intermittent portion 11b, the inner diameters of the threaded portions on the lower side are formed smaller between the ends of the threaded portions adjacent to each other via the intermittent portion 11b. ing.

本実施形態では、雌ねじ部１１ａの上端部よりも上方の無効ねじ部１１ｔは、図４に示すように、有効ねじ部（雌ねじ部１１ａの上端部と下端部１１ｅＬの間のねじ部）よりも内径が小さく雄ねじ部２２ａがねじ係合しにくい構成とされている。 In the present embodiment, the invalid threaded portion 11t above the upper end portion of the female threaded portion 11a is larger than the effective threaded portion (threaded portion between the upper end portion and the lower end portion 11eL of the female threaded portion 11a) as shown in FIG. The inner diameter is small and the male screw portion 22a is configured so that it is difficult for the male screw portion 22a to engage with the screw.

なお、雌ねじ部１１ａの下端部１１ｅＬは、雌ねじ部１１ａの有効ねじ部の下端部を意味するものとする。 The lower end portion 11eL of the female threaded portion 11a means the lower end portion of the effective threaded portion of the female threaded portion 11a.

従来の雌ねじは、下方向（ねじ係合を解除する方向）に向かって雌ねじ部の内径が大きくなるように構成されていたため、ねじ係合を解除していく過程で係合し合う雄ねじ部の谷の径と雌ねじ部の内径との差が大きくなり、ねじ係合の解除に必要なトルクが、係合するねじ山の数の減少割合よりも顕著に低下していく。これによって、ねじ係合を解除するために雌ねじ部を雄ねじ部に対して周方向に回転させると、すぐにねじ係合が解除されてしまい、利用者が意図しないキャップの脱落等が発生することがあった。 Since the conventional female screw is configured so that the inner diameter of the female screw portion increases in the downward direction (direction in which the screw engagement is released), the male screw portion that engages with each other in the process of disengaging the screw. The difference between the diameter of the valley and the inner diameter of the female thread portion becomes large, and the torque required for disengaging the thread is significantly lower than the rate of decrease in the number of threads to be engaged. As a result, when the female screw portion is rotated in the circumferential direction with respect to the male screw portion in order to disengage the screw, the screw engagement is immediately disengaged, and the cap may fall off unintentionally by the user. was there.

これに対して本実施形態では、雌ねじ部１１ａの下端部１１ｅＬの内径が、雌ねじ部１１ａの上端部の内径よりも小さくなるように構成されているため、特に、雌ねじ部１１ａの下部において、雌ねじ部１１ａのねじ山と雄ねじ部２２ａのねじ山との接触面積を増加させて所望の残留トルクを発生させることができる。また、ねじ係合が完全に解除される直前まで、内径が小さい雌ねじ部１１ａの下端部１１ｅＬにおいて所定の残留トルクを発生させることができる。従って、ねじ係合が完全に解除されるまでの間に雄ねじ部２２ａに対して雌ねじ部１１ａが意図せず外れてしまうことを抑制することができる。 On the other hand, in the present embodiment, the inner diameter of the lower end portion 11eL of the female thread portion 11a is configured to be smaller than the inner diameter of the upper end portion of the female thread portion 11a. The contact area between the thread of the portion 11a and the thread of the male thread 22a can be increased to generate a desired residual torque. Further, a predetermined residual torque can be generated at the lower end portion 11eL of the female screw portion 11a having a small inner diameter until just before the screw engagement is completely released. Therefore, it is possible to prevent the female screw portion 11a from being unintentionally disengaged from the male screw portion 22a until the screw engagement is completely released.

特に本実施形態では、雌ねじ部１１ａの巻数（雌ねじ部１１ａの上端部から下端部までの巻数）は１巻以上となっており、雌ねじ部１１ａの下端部１１ｅＬから上方に向かって半周分のねじ部１１ａＬは、雌ねじ部１１ａの上端部から下方に向かって半周分のねじ部１１ａＵよりも、同じ周方向位置で比較したときに、ねじ山が径方向内側にｄだけ突出しており、内径が２ｄだけ小さくなるように構成されている（図２及び図４参照）。この構成の採用によって、主に雌ねじ部１１ａの下部の領域で雌ねじ部１１ａのねじ山と雄ねじ部２２ａのねじ山との接触面積を更に増加させて所望の残留トルクを発生させることができる。また、ねじ係合解除時のトルクの減少による意図しないねじキャップ１０の脱落をより確実に抑制することができる。 In particular, in the present embodiment, the number of turns of the female threaded portion 11a (the number of turns from the upper end to the lower end of the female threaded portion 11a) is one or more, and the screw is half a circumference upward from the lower end portion 11eL of the female threaded portion 11a. The thread portion 11aL has a thread protruding inward in the radial direction by d from the threaded portion 11aU for half a circumference downward from the upper end portion of the female screw portion 11a at the same circumferential position, and the inner diameter is 2d. It is configured to be as small as possible (see FIGS. 2 and 4). By adopting this configuration, it is possible to further increase the contact area between the thread of the female thread portion 11a and the thread of the male thread portion 22a mainly in the lower region of the female thread portion 11a to generate a desired residual torque. In addition, it is possible to more reliably prevent the screw cap 10 from unintentionally falling off due to a decrease in torque when the screw engagement is released.

なお、ここで述べる「ねじ部の内径」とは、中心軸線Ｏを挟んで対向するねじ部が同じ突出量だけ径方向内側に突出していると仮定したときの対向するねじ部同士の最短距離であり、中心軸線Ｏとねじ部との最短距離の２倍の距離である。 The "inner diameter of the threaded portion" described here is the shortest distance between the opposed threaded portions when it is assumed that the threaded portions facing each other across the central axis O project inward in the radial direction by the same amount of protrusion. Yes, the distance is twice the shortest distance between the central axis O and the threaded portion.

また、ここで述べる、「雌ねじ部１１ａの巻数は１巻以上」とは、雌ねじ部１１ａが、上端部から下端部１１ｅＬまで間欠部１１ｂを含めて１周分以上のねじ部を有する、という意味である。雌ねじ部１１ａが２条ねじである場合、雌ねじ部１１ａは２条ねじを構成する２つのねじ部（ねじ山）をそれぞれ間欠部１１ｂを含めて１周分含んでいる、という意味である。なお、雌ねじ部１１ａは、３条以上の多条ねじであってもよい。 Further, "the number of turns of the female threaded portion 11a is one or more" described here means that the female threaded portion 11a has a threaded portion for one round or more including the intermittent portion 11b from the upper end portion to the lower end portion 11eL. Is. When the female thread portion 11a is a double threaded thread, it means that the female threaded portion 11a includes two threaded portions (threads) constituting the double threaded thread for one round including the intermittent portion 11b. The female thread portion 11a may be a multi-thread thread having three or more threads.

本実施形態にように、雌ねじ部１１ａの内径が、下方に向かって徐々に小さくなるように構成した場合では、残留トルクを６００Ｎ・ｃｍから６３９Ｎ・ｃｍへと約６．５％増加させることができる。 When the inner diameter of the female thread portion 11a is configured to gradually decrease downward as in the present embodiment, the residual torque can be increased by about 6.5% from 600 N · cm to 639 N · cm. can.

なお、本実施形態では、ねじキャップ１０の周壁１１を下方に向けて僅かに径方向外側に拡径するように構成し、雌ねじ部１１ａの内径を、雌ねじ部１１ａの上端部から下方に向かって徐々に小さくなるように形成したが、この態様には限定されない。例えば、ねじキャップ１０の周壁１１を下方に向けて径方向外側に拡径するように構成するとともに雌ねじ部１１ａの上端部から下方に向かってねじ部の内径が略同一になるように構成することによって、雌ねじ部１１ａのねじ山の高さが雌ねじ部１１ａの上端部から下方に向かって徐々に大きくなるように構成してもよい。この構成によって、雌ねじ部１１ａの上端部から下端部１１ｅＬまで、雄ねじ部２２ａと雌ねじ部１１ａのねじの係合（当接）の度合いを略同一にすることができる。なお、ねじ山の高さは、「（ねじ山の谷の径－ねじ山の内径）／２」で表すことができる。この構成であっても、従来技術の間欠ねじに対して、残留トルクの減少を抑制することができる。 In the present embodiment, the peripheral wall 11 of the screw cap 10 is configured to be slightly radially outwardly expanded toward the downward direction, and the inner diameter of the female threaded portion 11a is directed downward from the upper end portion of the female threaded portion 11a. It was formed so as to gradually become smaller, but the present invention is not limited to this aspect. For example, the peripheral wall 11 of the screw cap 10 is configured to expand in diameter outward in the radial direction, and the inner diameter of the threaded portion is substantially the same from the upper end portion of the female screw portion 11a downward. Therefore, the height of the thread of the female thread portion 11a may be configured to gradually increase downward from the upper end portion of the female thread portion 11a. With this configuration, the degree of engagement (contact) between the male screw portion 22a and the female screw portion 11a can be made substantially the same from the upper end portion to the lower end portion 11eL of the female screw portion 11a. The height of the thread can be expressed by "(diameter of the valley of the thread-inner diameter of the thread) / 2". Even with this configuration, it is possible to suppress a decrease in residual torque with respect to the intermittent screw of the prior art.

また、ねじキャップ１０の周壁１１を下方に向けて径方向外側に拡径するように構成するとともに、雌ねじ部１１ａの下端部１１ｅＬから上方に向かって半周分のねじ部１１ａＬと雌ねじ部１１ａの上端部から下方に向かって半周分のねじ部１１ａＵとが、同じ周方向位置で比較したときに内径が略同一になるように構成することによって、雌ねじ部１１ａの下端部１１ｅＬから上方に向かって半周分のねじ部１１ａＬが、雌ねじ部１１ａの上端部から下方に向かって半周分のねじ部１１ａＵよりも、同じ周方向位置で比較したときに、ねじ山の高さが高くなるように構成してもよい。 Further, the peripheral wall 11 of the screw cap 10 is configured to expand in diameter outward in the radial direction, and the threaded portion 11aL and the upper end of the female threaded portion 11a for half a circumference upward from the lower end portion 11eL of the female threaded portion 11a. By configuring the threaded portion 11aU for half a circumference from the portion downward so that the inner diameters are substantially the same when compared at the same circumferential position, the female threaded portion 11a is configured to have a half circumference upward from the lower end portion 11eL. The thread portion 11aL is configured so that the height of the thread is higher when compared at the same circumferential position than the thread portion 11aU for half a circumference downward from the upper end portion of the female thread portion 11a. May be good.

また、ねじキャップ１０の周壁１１を下方に向けて径方向外側に拡径するように構成するとともに、雌ねじ部１１ａの上端部のねじ部の内径と雌ねじ部１１ａの下端部１１ｅＬのねじ部の内径とが略同一になるように構成することによって、雌ねじ部１１ａの下端部１１ｅＬが雌ねじ部１１ａの上端部よりも、ねじ山の高さが高くなるように構成してもよい。 Further, the peripheral wall 11 of the screw cap 10 is configured to expand in diameter outward in the radial direction, and the inner diameter of the threaded portion at the upper end of the female threaded portion 11a and the inner diameter of the threaded portion at the lower end portion 11eL of the female threaded portion 11a. The lower end portion 11eL of the female threaded portion 11a may be configured so that the height of the thread is higher than that of the upper end portion of the female threaded portion 11a.

なお、本実施形態では、雌ねじ部１１ａの有効ねじ部（雌ねじ部１１ａの上端部から下端部１１ｅＬまでのねじ部）の巻数は約１．２巻である。 In this embodiment, the number of turns of the effective threaded portion (threaded portion from the upper end portion to the lower end portion 11eL of the female threaded portion 11a) of the female threaded portion 11a is about 1.2 turns.

本実施形態にかかるねじキャップ１０は、周壁１１の外周面に、縦方向に延びる平目ローレット１１ｄが形成されている。これによって、ねじキャップ１０の周壁１１を把持する際の利用者の指等と周壁１１との間の摩擦力を大きくすることができる。したがって、利用者は、ねじキャップ１０を中心軸線Ｏ周りに回転させて雄ねじ部２２ａと雌ねじ部１１ａとのねじ係合を解除させるための力をより効率よく伝達することができる。 In the screw cap 10 according to the present embodiment, a flat knurl 11d extending in the vertical direction is formed on the outer peripheral surface of the peripheral wall 11. As a result, the frictional force between the user's finger or the like and the peripheral wall 11 when gripping the peripheral wall 11 of the screw cap 10 can be increased. Therefore, the user can rotate the screw cap 10 around the central axis O to more efficiently transmit the force for disengaging the screw engagement between the male screw portion 22a and the female screw portion 11a.

本実施形態に係るねじキャップ１０は、図４に示すように、例えば、ノズル付きポンプを容器本体２０の口部２２に装着するために用いることができる。図４において、ポンプを構成するシリンダ３１の上端部から径方向外側に延びるフランジ部３１ａが、パッキン３１ｂとともに口部２２の上端部とねじキャップ１０の天壁１３との間に挟持されている。 As shown in FIG. 4, the screw cap 10 according to the present embodiment can be used, for example, to attach a pump with a nozzle to the mouth portion 22 of the container body 20. In FIG. 4, a flange portion 31a extending radially outward from the upper end portion of the cylinder 31 constituting the pump is sandwiched between the upper end portion of the mouth portion 22 and the top wall 13 of the screw cap 10 together with the packing 31b.

なお、ねじキャップ１０の用途は図４に示すものに限定されず、例えば、口部２２を閉塞する蓋体として用いるようにしてもよい。その場合、ねじキャップ１０は、天壁１３に天壁開口１３ａが設けられていなくてもよい。 The use of the screw cap 10 is not limited to that shown in FIG. 4, and may be used, for example, as a lid for closing the mouth portion 22. In that case, the screw cap 10 may not have the top wall opening 13a provided on the top wall 13.

本実施形態に係るねじキャップ１０は、例えば合成樹脂製とすることができる。そして、ねじキャップ１０を例えば射出成形によって形成する場合には、金型のコアが径方向内側にスライドするスライドコアを用いることによって、間欠部１１ｂを有する雌ねじ部１１ａを比較的容易に形成することができる。スライドコアを用いることによって、従来の雌ねじ部を備えたねじキャップを形成する場合のように、コアを回転させながらキャビティから取り外す必要がないので、成形サイクルが短くなるほか、抜き勾配を設けておく必要がない。従って、本実施形態のように、雌ねじ部１１ａの内径が雌ねじ部１１ａの上端部から下方に向かって徐々に小さくなるような形状を比較的容易に形成することができる。 The screw cap 10 according to the present embodiment can be made of, for example, a synthetic resin. When the screw cap 10 is formed by, for example, injection molding, the female screw portion 11a having the intermittent portion 11b is relatively easily formed by using the slide core in which the core of the mold slides inward in the radial direction. Can be done. By using the slide core, it is not necessary to remove it from the cavity while rotating the core as in the case of forming a screw cap with a conventional female thread part, so that the forming cycle is shortened and a draft is provided. There is no need. Therefore, as in the present embodiment, it is relatively easy to form a shape in which the inner diameter of the female screw portion 11a gradually decreases downward from the upper end portion of the female screw portion 11a.

以上述べたように、本実施形態は、外周面に雄ねじ部２２ａが形成された筒状の口部２２と、口部２２に肩部２４を介して連なり内容物の収容空間Ｓを形成する胴部２３と、胴部２３の下端部を閉塞する底部２５とを有する容器本体２０と、口部２２にねじ係合により装着されるねじキャップ１０とを備えるねじキャップ付き容器１００であって、ねじキャップ１０は、口部２２を径方向外側から囲む周壁１１を備え、周壁１１の内周面には、雄ねじ部２２ａにねじ係合する雌ねじ部１１ａが設けられ、雌ねじ部１１ａは、周方向に間欠的に設けられており、雌ねじ部１１ａの下端部１１ｅＬにおけるねじ山の高さは、雌ねじ部１１ａの上端部におけるねじ山の高さよりも高くなるように構成した。このような構成の採用によって、特に、雌ねじ部１１ａの下部において、雌ねじ部１１ａのねじ山と雄ねじ部２２ａのねじ山との接触面積を増加させて所望の残留トルクを発生させることができる。また、ねじ係合が完全に解除される直前まで、ねじ山の高さが高い雌ねじ部１１ａの下端部１１ｅＬにおいて所定の残留トルクを発生させることができる。従って、ねじ係合が完全に解除されるまでの間に雌ねじ部１１ａが意図せず雄ねじ部２２ａから外れてしまうことを抑制することができる。 As described above, in the present embodiment, the tubular mouth portion 22 having the male screw portion 22a formed on the outer peripheral surface and the body connected to the mouth portion 22 via the shoulder portion 24 to form a storage space S for the contents. A container 100 with a screw cap, comprising a container body 20 having a portion 23 and a bottom portion 25 for closing the lower end portion of the body portion 23, and a screw cap 10 attached to the mouth portion 22 by screw engagement. The cap 10 is provided with a peripheral wall 11 that surrounds the mouth portion 22 from the outside in the radial direction, and a female screw portion 11a that is screw-engaged with the male screw portion 22a is provided on the inner peripheral surface of the peripheral wall 11. It is provided intermittently, and the height of the thread at the lower end 11eL of the female thread 11a is configured to be higher than the height of the thread at the upper end of the female thread 11a. By adopting such a configuration, it is possible to increase the contact area between the thread of the female thread portion 11a and the thread of the male thread portion 22a to generate a desired residual torque, particularly in the lower part of the female thread portion 11a. Further, a predetermined residual torque can be generated at the lower end portion 11eL of the female thread portion 11a having a high thread height until just before the screw engagement is completely released. Therefore, it is possible to prevent the female screw portion 11a from being unintentionally disengaged from the male screw portion 22a until the screw engagement is completely released.

また、本実施形態では、雌ねじ部１１ａの巻数は１巻以上であるように構成した。このような構成の採用によって、有効ねじ部の長さを十分に確保して、ねじキャップ１０を容器本体２０の口部２２に装着したときの残留トルクを確保し易くすることができる。 Further, in the present embodiment, the number of turns of the female thread portion 11a is configured to be one or more. By adopting such a configuration, it is possible to secure a sufficient length of the effective screw portion and easily secure the residual torque when the screw cap 10 is attached to the mouth portion 22 of the container body 20.

また、本実施形態では、雌ねじ部１１ａの下端部１１ｅＬから上方に向かって半周分のねじ部１１ａＬは、雌ねじ部１１ａの上端部から下方に向かって半周分のねじ部１１ａＵよりも、同じ周方向位置で比較したときのねじ山の高さが高くなるように構成した。このような構成の採用によって、雌ねじ部１１ａのねじ山と雄ねじ部２２ａのねじ山との接触面積を更に増加させて所望の残留トルクを発生させることができる。また、ねじ係合解除時の残留トルクの減少による意図しないねじキャップ１０の脱落をより確実に抑制することができる。 Further, in the present embodiment, the threaded portion 11aL having a half circumference upward from the lower end portion 11eL of the female threaded portion 11a has the same circumferential direction as the threaded portion 11aU having a half circumference downward from the upper end portion of the female threaded portion 11a. It was configured so that the height of the thread was higher when compared in terms of position. By adopting such a configuration, the contact area between the thread of the female thread portion 11a and the thread of the male thread portion 22a can be further increased to generate a desired residual torque. Further, it is possible to more reliably suppress the unintended detachment of the screw cap 10 due to the decrease in the residual torque when the screw engagement is released.

本開示を諸図面や実施例に基づき説明してきたが、当業者であれば本開示に基づき種々の変形や修正を行うことが容易であることに注意されたい。従って、これらの変形や修正は本発明の範囲に含まれることに留意されたい。例えば、各構成部に含まれる機能などは論理的に矛盾しないように再配置可能であり、複数の構成部を１つに組み合わせたり、或いは分割したりすることが可能である。本発明の範囲にはこれらも包含されるものと理解されたい。 Although the present disclosure has been described based on the drawings and examples, it should be noted that those skilled in the art can easily make various modifications and corrections based on the present disclosure. Therefore, it should be noted that these modifications and modifications are included in the scope of the present invention. For example, the functions included in each component can be rearranged so as not to be logically inconsistent, and a plurality of components can be combined or divided into one. It should be understood that these are also included in the scope of the present invention.

例えば、雌ねじ部１１ａの巻数は１巻以上（約１．２巻）としているが、この態様には限定されず、雌ねじ部１１ａの巻数は、２巻以上であってもよい。 For example, the number of turns of the female threaded portion 11a is one or more (about 1.2 turns), but the present invention is not limited to this, and the number of turns of the female threaded portion 11a may be two or more.

また、本実施形態では、雌ねじ部１１ａの１周分のねじ部に、間欠部１１ｂが４箇所設けられるように構成したが、この態様には限定されない。１周分のねじ部内に設ける間欠部１１ｂの数は３箇所以下であってもよいし、５箇所以上であってもよい。また、間欠部１１ｂを設ける周方向位置は、間欠部１１ｂごとに異なっていてもよい。また、１周分のねじ部内に間欠部１１ｂを含まない箇所があってもよく、雌ねじ部１１ａが全体として少なくとも１つの間欠部１１ｂを備えていればよい。 Further, in the present embodiment, the threaded portion for one round of the female threaded portion 11a is configured to have four intermittent portions 11b, but the present embodiment is not limited to this embodiment. The number of intermittent portions 11b provided in the threaded portion for one round may be three or less, or may be five or more. Further, the circumferential position where the intermittent portion 11b is provided may be different for each intermittent portion 11b. Further, there may be a portion of the threaded portion for one round that does not include the intermittent portion 11b, and the female threaded portion 11a may include at least one intermittent portion 11b as a whole.

また、本実施形態では、雌ねじ部１１ａは、下方に向かって内径が徐々に小さくなるように構成されていることが最も好ましい旨記載したが、この態様には限定されない。雌ねじ部１１ａの下端部１１ｅＬのねじ山の高さが雌ねじ部１１ａの上端部のねじ山の高さよりも高く構成されていればよい。 Further, in the present embodiment, it is described that it is most preferable that the female screw portion 11a is configured so that the inner diameter gradually decreases toward the lower side, but the present invention is not limited to this embodiment. The height of the thread of the lower end 11eL of the female thread 11a may be higher than the height of the thread at the upper end of the female thread 11a.

１０ ねじキャップ
１１ 周壁
１１ａ 雌ねじ部
１１ａＬ 雌ねじ部の下端部から上方に向かって半周分のねじ部
１１ａＵ 雌ねじ部の上端部から下方に向かって半周分のねじ部
１１ｂ 間欠部
１１ｄ 平目ローレット
１１ｅＬ 雌ねじ部の下端部
１１ｔ 無効ねじ部
１３ 天壁
１３ａ 天壁開口
２０ 容器本体
２２ 口部
２２ａ 雄ねじ部
２３ 胴部
２４ 肩部
２５ 底部
３０ ポンプ
３１ シリンダ
３１ａ フランジ部
３１ｂ パッキン
４０ ノズルヘッド
４１ ノズル
１００ ねじキャップ付き容器
Ｏ 中心軸線
Ｓ 収容空間 10 Thread cap 11 Peripheral wall 11a Female threaded part 11aL Half-circle threaded part upward from the lower end of the female threaded part 11aU Half-circle threaded part from the upper end of the female threaded part 11b Intermittent part 11d Flat knurling 11eL Female threaded part Lower end 11t Invalid thread 13 Top wall opening 20 Container body 22 Mouth 22a Male thread 23 Body 24 Shoulder 25 Bottom 30 Pump 31 Cylinder 31a Flange 31b Packing 40 Nozzle head 41 Nozzle 100 Container with screw cap O Central axis S Containment space

Claims (3)

外周面に雄ねじ部が形成された筒状の口部と、前記口部に連なり内容物の収容空間を形成する胴部と、胴部の下端部を閉塞する底部とを有する容器本体と、
前記口部にねじ係合により装着されるねじキャップと
を備えるねじキャップ付き容器であって、
前記ねじキャップは、
前記口部を径方向外側から囲む周壁を備え、
前記周壁の内周面には、前記雄ねじ部にねじ係合する雌ねじ部が設けられ、
前記雌ねじ部は、周方向に間欠的に設けられており、
前記雌ねじ部の下端部におけるねじ山の高さは、前記雌ねじ部の上端部におけるねじ山の高さよりも高いことを特徴とするねじキャップ付き容器。 A container body having a cylindrical mouth portion having a male screw portion formed on an outer peripheral surface, a body portion connected to the mouth portion to form a storage space for contents, and a bottom portion closing the lower end portion of the body portion.
A container with a screw cap provided with a screw cap attached to the mouth portion by screw engagement.
The screw cap is
A peripheral wall that surrounds the mouth from the outside in the radial direction is provided.
On the inner peripheral surface of the peripheral wall, a female threaded portion that is screw-engaged with the male threaded portion is provided.
The female thread portion is provided intermittently in the circumferential direction, and is provided intermittently.
A container with a screw cap, wherein the height of the thread at the lower end of the female thread is higher than the height of the thread at the upper end of the female thread. 前記雌ねじ部の巻数は１巻以上である、請求項１に記載のねじキャップ付き容器。 The container with a screw cap according to claim 1, wherein the female screw portion has one or more turns. 前記雌ねじ部の下端部から上方に向かって半周分のねじ部は、前記雌ねじ部の上端部から下方に向かって半周分のねじ部よりも、同じ周方向位置で比較したときのねじ山の高さが高い、請求項２に記載のねじキャップ付き容器。 The thread portion for half a circumference from the lower end portion of the female thread portion upward is the height of the thread when compared at the same circumferential position than the thread portion for half circumference downward from the upper end portion of the female thread portion. The container with a screw cap according to claim 2, which has a high height.

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