JP6695787B2

JP6695787B2 - Screw cap

Info

Publication number: JP6695787B2
Application number: JP2016233521A
Authority: JP
Inventors: 淳士太田
Original assignee: Yoshino Kogyosho Co Ltd
Current assignee: Yoshino Kogyosho Co Ltd
Priority date: 2016-11-30
Filing date: 2016-11-30
Publication date: 2020-05-20
Anticipated expiration: 2036-11-30
Also published as: JP2018090278A

Description

本発明は、ねじキャップに関する。 The present invention relates to a screw cap.

容器本体の口部に装着されるキャップとして、例えば下記特許文献１に示されるように、弾性変形可能な軟材質で形成された有頂筒状の外筒体と、外筒体の内側に一体に組み合わされ、容器本体の口部に螺着される有頂筒状の内筒体と、を備えたねじキャップが知られている。
外筒体の周壁部及び内筒体の周壁部の間には、内筒体側に向けた外筒体の周壁部の弾性変形を許容させる環状の隙間が形成されている。これにより、外筒体の周壁部を把持することで、周壁部を内側に弾性変形させて内筒体の周壁部に接触させることが可能とされている。従って、外筒体の周壁部を介して内筒体の周壁部を把持することができ、外筒体及び内筒体を一体にキャップ軸回りに回転させて、容器本体の口部に対するキャップの着脱操作（開閉操作）を行える。 As a cap to be attached to the mouth portion of the container body, for example, as shown in Patent Document 1 below, a capped cylindrical outer cylinder body formed of an elastically deformable soft material and an inner cylinder of the outer cylinder body There is known a screw cap provided with an inner cylindrical body having a top end and which is combined with the above and is screwed to the mouth portion of the container body.
An annular gap is formed between the peripheral wall portion of the outer cylinder body and the peripheral wall portion of the inner cylinder body to allow elastic deformation of the peripheral wall portion of the outer cylinder body toward the inner cylinder body side. Accordingly, by gripping the peripheral wall portion of the outer cylindrical body, the peripheral wall portion can be elastically deformed inward and brought into contact with the peripheral wall portion of the inner cylindrical body. Therefore, the peripheral wall portion of the inner tubular body can be grasped via the peripheral wall portion of the outer tubular body, and the outer tubular body and the inner tubular body are integrally rotated around the cap axis to allow the cap to be attached to the mouth portion of the container body. Can be attached / detached (open / close).

特開２０１４−９０１２号公報JP, 2014-9012, A

しかしながら上記従来のねじキャップは、外筒体及び内筒体が別体に構成されているので、外筒体及び内筒体を組み合わせる手間が必要となり、効率の良い製造を行い難い。
また、外筒体及び内筒体が別体に構成されているため、キャップ軸方向への外筒体及び内筒体の相対的な抜け止めが必要とされる。この点、上記従来のねじキャップでは、外筒体における周壁部の下端部側の内周面に形成された環状突起を、内筒体における周壁部の下端部側の外周面に形成された環状凹部内に嵌合させることで、抜け止めを行っている。従って、抜け止め対策として環状突起及び環状凹部の構成が必要になってしまい、構成が煩雑化し易かった。 However, in the above-mentioned conventional screw cap, the outer cylinder body and the inner cylinder body are configured separately, so that it is necessary to combine the outer cylinder body and the inner cylinder body, and it is difficult to perform efficient manufacturing.
Further, since the outer tubular body and the inner tubular body are configured separately, it is necessary to prevent the outer tubular body and the inner tubular body from coming off relative to each other in the cap axial direction. In this respect, in the above-mentioned conventional screw cap, the annular protrusion formed on the inner peripheral surface of the lower wall side of the peripheral wall portion of the outer tubular body is formed on the outer peripheral surface of the lower wall side of the peripheral wall portion of the inner tubular body. It is prevented from coming off by fitting it in the recess. Therefore, the structure of the annular projection and the annular recess is required as a measure for preventing the coming off, and the structure is likely to be complicated.

しかも、外筒体における周壁部の下端部と、内筒体における周壁部の下端部と、を全周に亘って接触させているので、上記隙間が外部に開放されていないうえ、外筒体における周壁部の下端部側については弾性変形させることが難しい。そのため、外筒体の周壁部を円滑に弾性変形させ難くなってしまい、例えば僅かな把持力で外筒体の周壁部を弾性変形させることが難しい場合があった。 Moreover, since the lower end portion of the peripheral wall portion of the outer cylindrical body and the lower end portion of the peripheral wall portion of the inner cylindrical body are in contact with each other over the entire circumference, the above-mentioned gap is not opened to the outside and the outer cylindrical body is also opened. It is difficult to elastically deform the lower end portion side of the peripheral wall portion. Therefore, it becomes difficult to smoothly elastically deform the peripheral wall portion of the outer cylindrical body, and for example, it may be difficult to elastically deform the peripheral wall portion of the outer cylindrical body with a slight gripping force.

本発明は、このような事情に鑑みてなされたものであって、その目的は、容器本体の口部に対する着脱操作（開閉操作）をスムーズに行うことができると共に、構成の簡略化を図りながら効率の良い製造を行うことができるねじキャップを提供することである。 The present invention has been made in view of such circumstances, and an object thereof is to enable smooth attachment / detachment operation (opening / closing operation) with respect to the mouth portion of the container body, while simplifying the configuration. An object of the present invention is to provide a screw cap capable of performing efficient manufacturing.

（１）本発明に係るねじキャップは、容器本体の口部に螺着される内筒体と、前記内筒体に一体に形成されると共に、前記内筒体を径方向外側から囲む外筒体と、を備え、前記内筒体は、キャップ軸方向から見た平面視で角形状に形成された内筒部を備え、前記外筒体は、キャップ軸方向から見た平面視で円形状に形成されると共に、前記内筒部よりも薄肉に形成されて弾性変形可能とされた外筒部を備え、前記内筒部の外周面と前記外筒部の内周面との間には、キャップ軸方向のうちのいずれか一方に開放された開放空間が画成されている。 (1) The screw cap according to the present invention includes an inner cylinder that is screwed to the mouth of the container body, and an outer cylinder that is integrally formed with the inner cylinder and that surrounds the inner cylinder from the outside in the radial direction. A body, and the inner cylindrical body includes an inner cylindrical portion formed in a rectangular shape in a plan view viewed from the axial direction of the cap, and the outer cylindrical body is circular in a plan view viewed from the axial direction of the cap. And an elastically deformable outer cylinder part that is formed thinner than the inner cylinder part, and between the outer peripheral surface of the inner cylinder part and the inner peripheral surface of the outer cylinder part. , An opening space that is open in either one of the cap axial directions is defined.

本発明に係るねじキャップによれば、外筒部が弾性変形可能とされているので、外筒体を把持することで、外筒部を開放空間内に入り込ませるように内筒部側（径方向内側）に向けて弾性変形させることができる。これにより、外筒部を押し潰すように変形させることができ、外筒部を内筒部に対して押し付けることができる。このとき、角形状に形成された内筒部の外形形状に倣って外筒部を弾性変形させることができ、外筒部における変形部分の内周面を、角形状に形成された内筒部の角部に対して周方向に引っ掛けながら、外筒部を内筒部に対して押し付けることができる。
従って、外筒部を介して内筒部を一体に把持することができ、外筒部及び内筒部を一体的に容器本体の口部に対してキャップ軸回りに回転させることができる。その結果、容器本体の口部に対するねじキャップの着脱操作（開閉操作）を行うことができる。 According to the screw cap of the present invention, since the outer tubular portion is elastically deformable, the inner tubular portion side (diameter is set so that the outer tubular portion can be inserted into the open space by gripping the outer tubular body. It can be elastically deformed inward. As a result, the outer tubular portion can be deformed so as to be crushed, and the outer tubular portion can be pressed against the inner tubular portion. At this time, the outer cylinder part can be elastically deformed in accordance with the outer shape of the inner cylinder part formed in the square shape, and the inner peripheral surface of the deformed portion of the outer cylinder part is formed in the inner cylinder part formed in the square shape. The outer tubular portion can be pressed against the inner tubular portion while being hooked in the circumferential direction on the corner portion of the.
Therefore, the inner tubular portion can be integrally grasped via the outer tubular portion, and the outer tubular portion and the inner tubular portion can be integrally rotated around the cap axis with respect to the mouth portion of the container body. As a result, the screw cap can be attached / detached (opened / closed) to / from the mouth of the container body.

特に、外筒部を把持した際に、上述のように外筒部を内筒部の角部に引っ掛けることができるので、例えば角部を把持しながらねじキャップの着脱操作を行うことができ、着脱操作をスムーズに行うことができる。従って、性別、年齢等に関係なく、ねじキャップの着脱操作を容易に行うことができる。そのため、例えば女性や子供、或いは年配の方等のように、外筒体を把持する把持力（グリップ力）が小さい使用者にとっては、特に着脱操作し易く、好適なねじキャップとして用いることができる。
さらに上記開放空間がキャップ軸方向のうちのいずれか一方に開放されているので、外筒部を内筒部側に向けて円滑に弾性変形させ易い。従って、外筒部をスムーズに弾性変形させることができ、上述したねじキャップの着脱操作をさらに容易に行い易い。
また、外筒部が内筒部よりも薄肉とされているので、外筒部を介して内筒部を把持したときに、内筒部の外形形状を例えば指先の触覚で認識することができ、あたかも内筒部を直接把持するような感覚でねじキャップの着脱操作を行うことができる。 In particular, when the outer cylinder is gripped, the outer cylinder can be hooked on the corner of the inner cylinder as described above, so that the screw cap can be attached and detached while gripping the corner, for example. The attachment and detachment operation can be performed smoothly. Therefore, the screw cap can be easily attached and detached regardless of gender, age, and the like. Therefore, for a user such as a woman, a child, or an elderly person who has a small gripping force (grip force) for gripping the outer cylindrical body, it is particularly easy to attach and detach and can be used as a suitable screw cap. ..
Further, since the open space is opened in either one of the cap axial directions, it is easy to smoothly elastically deform the outer tubular portion toward the inner tubular portion. Therefore, the outer tubular portion can be elastically deformed smoothly, and the above-described screw cap attaching / detaching operation can be performed more easily.
Further, since the outer tubular portion is thinner than the inner tubular portion, when the inner tubular portion is gripped via the outer tubular portion, the outer shape of the inner tubular portion can be recognized by, for example, a tactile sensation of a fingertip. The screw cap can be attached / detached as if the inner cylinder portion were directly gripped.

さらに、内筒体及び外筒体を別体ではなく一体に形成しているので、内筒体及び外筒体がキャップ軸方向及び周方向に位置ずれすることがない。従って、例えば従来のような抜け止め対策等を行う必要がなく、構成の簡略化を図ることができる。しかも、内筒体及び外筒体を組み合わせる手間が不要となるので、ねじキャップを効率良く製造することができる。
さらには、外筒部が平面視円形状に形成されているので、外筒体の外観に制約が生じることを抑制することができるうえ、例えば外筒部の外周面に塗装、印刷等の加飾を容易に施すことも可能となる。従って、ねじキャップ全体の外観性及びデザイン性を向上させ易い。 Furthermore, since the inner cylinder body and the outer cylinder body are integrally formed instead of separate bodies, the inner cylinder body and the outer cylinder body are not displaced in the cap axial direction and the circumferential direction. Therefore, for example, it is not necessary to take a retaining measure as in the related art, and the configuration can be simplified. Moreover, since the trouble of assembling the inner cylinder and the outer cylinder is unnecessary, the screw cap can be efficiently manufactured.
Furthermore, since the outer cylinder part is formed in a circular shape in a plan view, it is possible to prevent the appearance of the outer cylinder body from being restricted, and for example, the outer peripheral surface of the outer cylinder part is subjected to painting or printing. It is also possible to easily decorate. Therefore, it is easy to improve the appearance and design of the entire screw cap.

（２）前記開放空間は、前記内筒部及び前記外筒部の各開放端部側に向けて開放されても良い。 (2) The open space may be opened toward the open end portions of the inner tubular portion and the outer tubular portion.

この場合には、開放空間が内筒部及び外筒部の各開放端部側、すなわちキャップ天壁とはキャップ軸方向の反対側に向けて開放されているので、開放空間を外部から見え難くすることができる。従って、良好な見栄えを確保して、ねじキャップの外観性をさらに向上させることができる。
また、開放空間が外筒部の開放端部側に開放されているので、外筒部の開放端部を自由端とすることができ、径方向に弾性変形させ易くすることができる。従って、例えば外筒体を上方から手の平で覆いながら外筒部を把持した場合、指先を外筒部の開放端部側に自然と位置させることができるので、そのままの流れで外筒部の開放端部を内筒部側に向けて、容易且つ積極的に弾性変形させることができる。従って、僅かな把持力であっても外筒部をさらにスムーズに弾性変形させることができ、ねじキャップの着脱操作の操作性をさらに向上することができる。 In this case, since the open space is open toward the open end sides of the inner cylinder part and the outer cylinder part, that is, the side opposite to the cap top wall in the cap axial direction, it is difficult to see the open space from the outside. can do. Therefore, it is possible to secure a good appearance and further improve the appearance of the screw cap.
In addition, since the open space is open to the open end side of the outer cylinder part, the open end part of the outer cylinder part can be a free end and can be easily elastically deformed in the radial direction. Therefore, for example, when the outer cylinder is grasped while covering the outer cylinder with the palm from above, the fingertip can be naturally positioned on the open end side of the outer cylinder, and the outer cylinder can be opened by the same flow. It is possible to easily and positively elastically deform the end portion toward the inner cylinder portion side. Therefore, the outer cylinder portion can be elastically deformed more smoothly even with a slight gripping force, and the operability of the screw cap attachment / detachment operation can be further improved.

加えて、開放空間がキャップ天壁とはキャップ軸方向の反対側に向けて開放されているので、外筒部を指先で把持した際に、開放空間内に指先が入り込み難い。そのため、外筒部と内筒部との間で指先が挟まれてしまうような不都合を抑制することができる。さらに、開放空間内に塵埃等が入り込むことを防止し易い。 In addition, since the open space is open toward the side opposite to the cap top wall in the axial direction of the cap, it is difficult for the fingertip to enter the open space when the outer cylinder is gripped by the fingertip. Therefore, it is possible to suppress the inconvenience that the fingertip is sandwiched between the outer tubular portion and the inner tubular portion. Furthermore, it is easy to prevent dust and the like from entering the open space.

（３）前記内筒部は、偶数個の平坦壁が周方向に繋がった角形状に形成されても良い。 (3) The inner cylindrical portion may be formed in an angular shape in which an even number of flat walls are connected in the circumferential direction.

この場合には、外筒体を把持して、外筒部を内筒部側に向けて弾性変形させたときに、例えば２本の指先（親指や中指等）を利用して、径方向で対向する平坦壁同士を、外筒部を介して挟み込むことができる。これにより、外筒部を介して内筒部をより安定して把持し易く、内筒部に対して回転力を良好に伝達することができるので、ねじキャップの着脱操作をさらに容易に行うことができる。 In this case, when the outer tubular body is gripped and the outer tubular portion is elastically deformed toward the inner tubular portion side, for example, by using two fingertips (thumb, middle finger, etc.), the radial direction is increased. The flat walls facing each other can be sandwiched via the outer cylindrical portion. As a result, the inner tubular portion can be more stably gripped via the outer tubular portion, and the rotational force can be satisfactorily transmitted to the inner tubular portion, so that the screw cap can be more easily attached and detached. You can

（４）前記開放空間は、前記内筒部と前記外筒部との間に、前記内筒部及び前記外筒部の全周に亘って環状に形成されても良い。 (4) The open space may be formed in an annular shape between the inner tubular portion and the outer tubular portion and over the entire circumference of the inner tubular portion and the outer tubular portion.

この場合には、開放空間が環状に形成され、外筒部が全周に亘って内筒部から離間しているので、外筒部を内筒部側に向けて弾性変形させる際、その初期段階において、外筒部が内筒部の角部からの影響（角部からの反力）を受け難く、よりスムーズに弾性変形し易い。従って、僅かな把持力であっても、抵抗少なく、また反応良く外筒部を弾性変形させることができ、ねじキャップの着脱操作の操作性をさらに向上させることができる。 In this case, since the open space is formed in an annular shape and the outer tubular portion is separated from the inner tubular portion over the entire circumference, when the outer tubular portion is elastically deformed toward the inner tubular portion side, the initial At the stage, the outer tubular portion is less likely to be affected by the corner portion of the inner tubular portion (reaction force from the corner portion), and can be elastically deformed more smoothly. Therefore, even with a slight gripping force, the outer cylinder portion can be elastically deformed with low resistance and good reaction, and the operability of the attaching / detaching operation of the screw cap can be further improved.

（５）前記外筒部の開放端部は、前記内筒部の開放端部よりもキャップ天壁とはキャップ軸方向の反対側に向けて突出しても良い。 (5) The open end portion of the outer tubular portion may protrude toward the side opposite to the open end portion of the inner tubular portion in the axial direction of the cap with respect to the cap top wall.

この場合には、例えば外筒部の外周面に印刷や塗装等の加飾を施すときに、外筒部の開放端部の内側に、外筒部の内側全体を覆って内筒体を隠すマスク部材を嵌合させることが可能である。これにより、外筒部の内側及び内筒体への影響を気にすることなく、外筒部の外周面に限って加飾を適切且つ容易に行うことができる。 In this case, for example, when performing decoration such as printing or painting on the outer peripheral surface of the outer tubular portion, the inner tubular body is hidden inside the open end portion of the outer tubular portion by covering the entire inner side of the outer tubular portion. It is possible to fit the mask member. Accordingly, the decoration can be appropriately and easily performed only on the outer peripheral surface of the outer tubular portion without worrying about the influence on the inner side of the outer tubular portion and the inner tubular body.

本発明に係るねじキャップによれば、容器本体の口部に対する着脱操作（開閉操作）をスムーズに行うことができると共に、構成の簡略化を図りながら効率の良い製造を行うことができる。 According to the screw cap of the present invention, the attachment / detachment operation (opening / closing operation) with respect to the mouth portion of the container body can be smoothly performed, and the manufacturing can be performed efficiently while simplifying the configuration.

本発明に係るねじキャップの実施形態を示す図であって、容器本体の口部にねじキャップが装着されている状態における半縦断面図である。It is a figure which shows embodiment of the screw cap which concerns on this invention, Comprising: It is a semi-longitudinal sectional view in the state where the screw cap is attached to the opening part of a container main body. 図１に示すねじキャップの縦断面図である。It is a longitudinal cross-sectional view of the screw cap shown in FIG. 図２に示すねじキャップの下面図である。FIG. 3 is a bottom view of the screw cap shown in FIG. 2. 図３に示すＡ−Ａ線に沿ったねじキャップの縦断面図である。FIG. 4 is a vertical cross-sectional view of the screw cap taken along the line AA shown in FIG. 3. 図２に示す状態から外筒部を内筒部側に弾性変形させた状態を示す縦断面図である。FIG. 3 is a vertical cross-sectional view showing a state in which the outer tubular portion is elastically deformed to the inner tubular portion side from the state shown in FIG. 2.

以下、本発明に係るねじキャップの実施形態について図面を参照して説明する。
図１に示すように、本実施形態のねじキャップ１は、内容物が収容される容器本体１００の口部１０１に螺着される内筒体２と、内筒体２に一体に形成されると共に、内筒体２を径方向外側から囲む外筒体３と、キャップ天壁４と、を備えた有頂筒状に形成されている。
なお、ねじキャップ１は、合成樹脂材料、具体的にはポリプロピレンによって一体に形成されている。ただし、ねじキャップ１の材料としてはポリプロピレンに限定されるものではなく、例えばポリエチレン等の他の合成樹脂材料を用いても構わない。 Hereinafter, an embodiment of a screw cap according to the present invention will be described with reference to the drawings.
As shown in FIG. 1, the screw cap 1 of the present embodiment is integrally formed with the inner cylinder body 2 and an inner cylinder body 2 screwed to a mouth portion 101 of a container body 100 in which contents are stored. At the same time, it is formed in a topped tubular shape including an outer tubular body 3 that surrounds the inner tubular body 2 from the outside in the radial direction, and a cap top wall 4.
The screw cap 1 is integrally formed of a synthetic resin material, specifically polypropylene. However, the material of the screw cap 1 is not limited to polypropylene, and other synthetic resin materials such as polyethylene may be used.

容器本体１００、内筒体２及び外筒体３は、それぞれの中心軸線が共通軸上に位置された状態で配設されている。本実施形態では、この共通軸をキャップ軸Ｏといい、キャップ軸Ｏに沿ったキャップ天壁４側を上側、容器本体１００側を下側という。また、キャップ軸Ｏ方向から見た平面視において、キャップ軸Ｏに直交する方向を径方向といい、キャップ軸Ｏ回りに周回する方向を周方向という。 The container main body 100, the inner cylindrical body 2, and the outer cylindrical body 3 are arranged with their central axes located on a common axis. In the present embodiment, this common axis is referred to as the cap axis O, the cap top wall 4 side along the cap axis O is referred to as the upper side, and the container body 100 side is referred to as the lower side. Further, in a plan view seen from the direction of the cap axis O, a direction orthogonal to the cap axis O is called a radial direction, and a direction of turning around the cap axis O is called a circumferential direction.

図示の例では、容器本体１００の口部１０１に、吐出口１１１が形成された吐出キャップ１１０が装着されている。
ただし、吐出キャップ１１０は、ねじキャップ１に必要とされる必須な構成部材ではなく、具備しなくても構わない。従って、吐出キャップ１１０の有無によって、ねじキャップ１の構成が変更或いは限定されるものではない。 In the illustrated example, a discharge cap 110 having a discharge port 111 is attached to the mouth 101 of the container body 100.
However, the discharge cap 110 is not an essential constituent member required for the screw cap 1 and may not be provided. Therefore, the structure of the screw cap 1 is not changed or limited depending on the presence or absence of the discharge cap 110.

吐出キャップ１１０は、容器本体１００の口部１０１の上端開口縁上に配置され、口部１０１を上方から覆う円板状の頂壁部１１２と、頂壁部１１２の外周縁部から下方に向けて延び、容器本体１００の口部１０１の上端部にアンダーカット嵌合された嵌合筒部１１３と、頂壁部１１２から下方に向けて延び、容器本体１００の口部１０１の内側に例えば密に嵌合するシール筒部１１４と、を有する有頂筒状に形成され、キャップ軸Ｏと同軸に配設されている。
上記吐出口１１１は、頂壁部１１２の中央部分に形成され、例えば平面視円形状に形成されている。 The discharge cap 110 is arranged on the upper end opening edge of the mouth portion 101 of the container body 100, and has a disc-shaped top wall portion 112 that covers the mouth portion 101 from above, and faces downward from the outer peripheral edge portion of the top wall portion 112. And a fitting cylinder 113 that is undercut-fitted to the upper end of the mouth 101 of the container body 100 and extends downward from the top wall 112. Is formed into a top-end cylindrical shape having a seal tube portion 114 that fits in the.
The discharge port 111 is formed in the central portion of the top wall portion 112, and has, for example, a circular shape in plan view.

図１〜図４に示すように、内筒体２は、容器本体１００の口部１０１を径方向外側から囲む装着筒部１０と、装着筒部１０を径方向外側から囲む内筒部１１と、上記キャップ天壁４と、を備え、二重の有頂筒状に形成されている。 As shown in FIGS. 1 to 4, the inner tubular body 2 includes a mounting tubular portion 10 that surrounds the mouth portion 101 of the container body 100 from the outside in the radial direction, and an inner tubular portion 11 that surrounds the mounting tubular portion 10 from the outside in the radial direction. , And the cap top wall 4, and is formed into a double-ended cylinder.

キャップ天壁４は、平面視円形状に形成され、装着筒部１０の上端開口部及び内筒部１１の上端開口部を閉塞している。キャップ天壁４は、外周縁部が内筒部１１よりも径方向外側に突出するように形成され、外筒体３における後述する外筒部３０の上端開口部を閉塞している。なお、キャップ天壁４は、内筒体２だけでなく外筒体３を構成する共通の部材とされている。 The cap top wall 4 is formed in a circular shape in a plan view and closes the upper end opening of the mounting cylinder 10 and the upper end opening of the inner cylinder 11. The cap top wall 4 is formed such that the outer peripheral edge portion thereof projects radially outward from the inner tubular portion 11, and closes an upper end opening of an outer tubular portion 30 of the outer tubular body 3 which will be described later. The cap top wall 4 is a common member that constitutes not only the inner cylindrical body 2 but also the outer cylindrical body 3.

キャップ天壁４のうち、装着筒部１０よりも径方向内側に位置する部分には、下方に向けて突出し、吐出キャップ１１０の頂壁部１１２に対して上方から密に接触するシール突起１２が形成されている。
図示の例では、シール突起１２は環状に形成されていると共に、径方向に間隔をあけて二重に配置されている。これにより、シール突起１２は、ねじキャップ１の装着時において、吐出口１１１を通じた内容物の漏出を効果的に抑制している。 A seal projection 12 that projects downward and is in close contact with the top wall portion 112 of the discharge cap 110 from above is provided at a portion of the cap top wall 4 that is located radially inward of the mounting cylinder portion 10. Has been formed.
In the illustrated example, the seal protrusions 12 are formed in an annular shape, and are arranged in a double manner with a space therebetween in the radial direction. Thereby, the seal projection 12 effectively suppresses the leakage of the contents through the discharge port 111 when the screw cap 1 is attached.

装着筒部１０は、容器本体１００の口部１０１に対応して円筒状に形成され、その内周面には容器本体１００の口部１０１の外周面に形成された第１ねじ部１０２に螺着される第２ねじ部１３が形成されている。第２ねじ部１３が第１ねじ部１０２に螺着されることで、ねじキャップ１の全体は容器本体１００の口部１０１に装着されている。 The mounting cylinder portion 10 is formed in a cylindrical shape corresponding to the mouth portion 101 of the container body 100, and has an inner peripheral surface that is screwed into a first screw portion 102 formed on the outer peripheral surface of the mouth portion 101 of the container body 100. The 2nd screw part 13 to be worn is formed. By screwing the second screw portion 13 onto the first screw portion 102, the entire screw cap 1 is attached to the mouth portion 101 of the container body 100.

内筒部１１は、キャップ軸Ｏ方向から見た平面視で角形状に形成されると共に、装着筒部１０との間に隙間をあけた状態で装着筒部１０を径方向外側から囲むように形成されている。
図示の例では、内筒部１１は、６個の平坦壁２０が一定角度で周方向に繋がった正六角形状に形成されている。ただし、内筒部１１の形状は正六角形状に限定されるものではなく、その他の角形状であっても構わないが、偶数個の平坦壁２０を有する偶数角形状であることが好ましい。 The inner tubular portion 11 is formed in a rectangular shape in a plan view when viewed from the direction of the cap axis O, and surrounds the mounting tubular portion 10 from the outer side in the radial direction with a gap provided between the inner tubular portion 11 and the mounting tubular portion 10. Has been formed.
In the illustrated example, the inner cylindrical portion 11 is formed in a regular hexagonal shape in which six flat walls 20 are connected in the circumferential direction at a constant angle. However, the shape of the inner tubular portion 11 is not limited to the regular hexagonal shape, and may be another angular shape, but an even-numbered shape having an even number of flat walls 20 is preferable.

内筒部１１は、キャップ天壁４から装着筒部１０と同じ長さだけ下方に向けて延びている。これにより、内筒部１１の下端部（開放端部）は、装着筒部１０の下端部に対してキャップ軸Ｏ方向に同等の位置に配置されている。
内筒部１１は、上述のように正六角形状に形成されているので、周方向に隣り合う平坦壁２０同士の接続部分には６個の角部２１が形成されている。これらの角部２１は、内筒部１１の全長に亘って縦長に形成されている。 The inner tubular portion 11 extends downward from the cap top wall 4 by the same length as the mounting tubular portion 10. As a result, the lower end portion (open end portion) of the inner tubular portion 11 is arranged at the same position in the cap axis O direction with respect to the lower end portion of the mounting tubular portion 10.
Since the inner cylindrical portion 11 is formed in a regular hexagonal shape as described above, six corner portions 21 are formed at the connecting portions between the flat walls 20 adjacent to each other in the circumferential direction. These corners 21 are formed vertically over the entire length of the inner cylinder 11.

上述のように構成された装着筒部１０と内筒部１１とは、周方向に間隔をあけて配置された連結リブ２２によって径方向に一体に連結されている。
連結リブ２２は、平坦壁２０の数に対応して６つ設けられ、各平坦壁２０の径方向内側に配置されている。連結リブ２２は、内端部が装着筒部１０の外周面に一体に形成され、外端部が平坦壁２０における周方向の中央部分の内周面に一体に形成されている。さらに、連結リブ２２は装着筒部１０及び内筒部１１の全長に亘って縦長に形成され、その上端部はキャップ天壁４に対して一体に形成されている。 The mounting cylinder portion 10 and the inner cylinder portion 11 configured as described above are connected integrally in the radial direction by the connecting ribs 22 arranged at intervals in the circumferential direction.
Six connecting ribs 22 are provided so as to correspond to the number of the flat walls 20, and are arranged inside the flat walls 20 in the radial direction. The connecting rib 22 has an inner end portion integrally formed with the outer peripheral surface of the mounting cylinder portion 10, and an outer end portion integrally formed with the inner peripheral surface of a central portion of the flat wall 20 in the circumferential direction. Further, the connecting rib 22 is formed to be vertically long over the entire length of the mounting cylinder portion 10 and the inner cylinder portion 11, and the upper end portion thereof is integrally formed with the cap top wall 4.

このように、内筒部１１が連結リブ２２を介して装着筒部１０に一体に連結されているので、内筒部１１の全体は一定の剛性を有している。これにより、例えば平坦壁２０に、意図しない径方向への変形、歪み等が生じることを抑制している。
特に、平坦壁２０のうち径方向に変形し易い周方向の中央部分を、連結リブ２２を介して装着筒部１０に一体に連結しているので、上述した意図しない変形や歪み等が発生することを効果的に抑制することができる。具体的には、ねじキャップ１の着脱操作を行うにあたって、外筒部３０を介して内筒部１１を把持することで内筒部１１に対して径方向外側から外力が作用したとしても、内筒部１１自身が径方向内側に変形することを効果的に抑制することができる。 As described above, since the inner tubular portion 11 is integrally connected to the mounting tubular portion 10 via the connecting rib 22, the entire inner tubular portion 11 has a certain rigidity. Thereby, for example, the flat wall 20 is prevented from being unintentionally deformed or distorted in the radial direction.
Particularly, since the central portion of the flat wall 20 in the circumferential direction, which is easily deformed in the radial direction, is integrally connected to the mounting cylinder portion 10 via the connecting rib 22, the above-described unintended deformation or distortion occurs. This can be effectively suppressed. Specifically, when the screw cap 1 is attached / detached, even if an external force acts from the radially outer side on the inner tubular portion 11 by gripping the inner tubular portion 11 via the outer tubular portion 30, It is possible to effectively suppress the tubular portion 11 itself from being deformed inward in the radial direction.

なお、連結リブ２２は必須なものではなく、具備しなくても構わない。ただし、連結リブ２２を設けることで、上述のように内筒部１１の全体の剛性を確保することができるので、好ましい。また、連結リブ２２を設ける場合には、上述した場合に限定されるものではなく、例えば装着筒部１０の下端部と内筒部１１の下端部とを径方向に一体に連結するように、連結リブ２２を形成しても構わない。 The connecting rib 22 is not essential and may not be provided. However, by providing the connecting rib 22, it is possible to secure the rigidity of the entire inner cylindrical portion 11 as described above, which is preferable. Further, when the connecting rib 22 is provided, it is not limited to the above-mentioned case, and for example, the lower end portion of the mounting tubular portion 10 and the lower end portion of the inner tubular portion 11 may be integrally connected in the radial direction. The connecting rib 22 may be formed.

外筒体３は、キャップ天壁４と、キャップ天壁４の外周縁部から下方に向けて延びると共に、内筒部１１を径方向外側から囲む外筒部３０と、を備えている。
外筒部３０は、キャップ軸Ｏ方向から見た平面視で円形状に形成されると共に、内筒部１１との間に隙間をあけた状態で内筒部１１を径方向外側から囲むように形成されている。図示の例では、外筒部３０は円筒状に形成されている。ただし、外筒部３０の形状は円筒状に限定されるものではなく、平面視で楕円状に形成されていても構わない。 The outer tubular body 3 includes a cap top wall 4 and an outer tubular portion 30 that extends downward from the outer peripheral edge portion of the cap top wall 4 and surrounds the inner tubular portion 11 from the outside in the radial direction.
The outer tubular portion 30 is formed in a circular shape in a plan view as seen from the direction of the cap axis O, and surrounds the inner tubular portion 11 from the outside in the radial direction while leaving a gap between the outer tubular portion 30 and the inner tubular portion 11. Has been formed. In the illustrated example, the outer cylinder portion 30 is formed in a cylindrical shape. However, the shape of the outer cylinder portion 30 is not limited to the cylindrical shape, and may be formed into an elliptical shape in a plan view.

外筒部３０の下端部（開放端部）は、内筒部１１の下端部よりも下方に向けて突出、すなわちキャップ天壁４とはキャップ軸Ｏ方向の反対側に向けて突出している。外筒部３０は、内筒部１１よりも薄肉に形成されており、これによって弾性変形可能とされている。図示の例では、外筒部３０の肉厚は全域に亘って同等とされ、内筒部１１の肉厚の半分程度の肉厚とされている。 A lower end portion (open end portion) of the outer tubular portion 30 projects downward from the lower end portion of the inner tubular portion 11, that is, a portion opposite to the cap top wall 4 in the cap axis O direction. The outer tubular portion 30 is formed to be thinner than the inner tubular portion 11, and thus is elastically deformable. In the illustrated example, the thickness of the outer tubular portion 30 is equal over the entire region, and is about half the thickness of the inner tubular portion 11.

内筒部１１と外筒部３０との間には、内筒部１１及び外筒部３０の全周に亘って連続して延びると共に、内筒部１１及び外筒部３０の下端部側に向けて開放された環状の開放空間Ｓが形成されている。開放空間Ｓが形成されていることで、外筒部３０に対して径方向外側から外力を加えることで、外筒部３０を内筒部１１側に向けて押し潰すように弾性変形させることが可能とされている。 Between the inner tubular portion 11 and the outer tubular portion 30, the inner tubular portion 11 and the outer tubular portion 30 are continuously extended over the entire circumference thereof, and at the lower end side of the inner tubular portion 11 and the outer tubular portion 30. An annular open space S that is open toward the side is formed. Since the open space S is formed, it is possible to elastically deform the outer tubular portion 30 toward the inner tubular portion 11 side by applying an external force to the outer tubular portion 30 from the outside in the radial direction. It is possible.

（ねじキャップの使用）
次に、上述したように構成されたねじキャップ１を使用する場合について説明する。
図１に示す状態において外筒体３を例えば指先で把持し、外筒部３０に対して径方向外側から外力を加えることで、図５に示すように、外筒部３０を開放空間Ｓ内に入り込ませるように内筒部１１側（径方向内側）に弾性変形させることができる。 (Use of screw cap)
Next, the case of using the screw cap 1 configured as described above will be described.
In the state shown in FIG. 1, by gripping the outer tubular body 3 with a fingertip, for example, and applying an external force to the outer tubular portion 30 from the outside in the radial direction, the outer tubular portion 30 is opened in the open space S, as shown in FIG. It can be elastically deformed toward the inner cylinder portion 11 side (inward in the radial direction) so as to enter.

これにより、外筒部３０を押し潰すように変形させることができ、外筒部３０の内周面を内筒部１１の外周面に対して押し付けることができる。このとき、正六角形状に形成された内筒部１１の外形形状に倣って外筒部３０を弾性変形させることができ、外筒部３０における変形部分の内周面を、内筒部１１の角部２１に対して周方向に引っ掛けながら、外筒部３０を内筒部１１に対して押し付けることができる。 As a result, the outer tubular portion 30 can be deformed so as to be crushed, and the inner peripheral surface of the outer tubular portion 30 can be pressed against the outer peripheral surface of the inner tubular portion 11. At this time, the outer cylinder portion 30 can be elastically deformed following the outer shape of the inner cylinder portion 11 formed in the regular hexagonal shape, and the inner peripheral surface of the deformed portion of the outer cylinder portion 30 is The outer cylinder portion 30 can be pressed against the inner cylinder portion 11 while being hooked in the circumferential direction on the corner portion 21.

従って、外筒部３０を介して内筒部１１を一体に把持することができ、外筒部３０及び内筒部１１を一体的に容器本体１００の口部１０１に対してキャップ軸Ｏ回りに回転させることができる。その結果、容器本体１００の口部１０１に対するねじキャップ１の着脱操作（開閉操作）を行うことができる。 Therefore, the inner tubular portion 11 can be integrally grasped via the outer tubular portion 30, and the outer tubular portion 30 and the inner tubular portion 11 can be integrally united with respect to the mouth portion 101 of the container body 100 around the cap axis O. It can be rotated. As a result, the screw cap 1 can be attached / detached (opened / closed) to / from the mouth 101 of the container body 100.

特に、本実施形態のねじキャップ１では、外筒部３０を把持した際に、上述のように外筒部３０を内筒部１１の角部２１に引っ掛けることができるので、例えば角部２１を把持しながらねじキャップ１の着脱操作を行うことができ、着脱操作をスムーズに行うことができる。従って、性別、年齢等に関係なく、ねじキャップ１の着脱操作を容易に行うことができる。そのため、例えば女性や子供、或いは年配の方等のように、外筒体３を把持する把持力（グリップ力）が小さい使用者にとっては特に着脱操作し易く、好適なねじキャップ１として用いることができる。
さらに開放空間Ｓが下方に向けて開放されているので、外筒部３０を内筒部１１側に向けて円滑に弾性変形させ易い。従って、外筒部３０をスムーズに弾性変形させることができ、上述したねじキャップ１の着脱操作をさらに容易に行い易い。 Particularly, in the screw cap 1 of the present embodiment, when the outer tubular portion 30 is gripped, the outer tubular portion 30 can be hooked on the corner portion 21 of the inner tubular portion 11 as described above. The screw cap 1 can be attached / detached while gripping, and the attachment / detachment can be smoothly performed. Therefore, the attachment / detachment operation of the screw cap 1 can be easily performed regardless of gender, age, or the like. Therefore, it is particularly easy for a user, such as a woman, a child, an elderly person, or the like, who has a small gripping force (grip force) to grip the outer tubular body 3 to easily attach and detach, and to use as the suitable screw cap 1. it can.
Furthermore, since the open space S is opened downward, it is easy to elastically deform the outer tubular portion 30 smoothly toward the inner tubular portion 11 side. Therefore, the outer cylinder portion 30 can be elastically deformed smoothly, and the above-described attaching / detaching operation of the screw cap 1 can be performed more easily.

また、外筒部３０が内筒部１１よりも薄肉とされているので、外筒部３０を介して内筒部１１を把持したときに、内筒部１１の外形形状を指先の触覚で認識することができ、あたかも内筒部１１を直接把持するような感覚でねじキャップ１の着脱操作を行うことができる。 Further, since the outer tubular portion 30 is thinner than the inner tubular portion 11, when the inner tubular portion 11 is gripped via the outer tubular portion 30, the outer shape of the inner tubular portion 11 is recognized by the tactile sensation of the fingertip. Therefore, the screw cap 1 can be attached / detached as if the inner cylinder 11 was directly gripped.

さらに、内筒体２及び外筒体３を別体ではなく一体に形成しているので、内筒体２及び外筒体３がキャップ軸Ｏ方向及び周方向に位置ずれすることがない。従って、例えば従来のような抜け止め対策等を行う必要がなく、構成の簡略化を図ることができる。しかも、内筒体２及び外筒体３を組み合わせる手間が不要となるので、ねじキャップ１を効率良く製造することができる。 Furthermore, since the inner cylinder body 2 and the outer cylinder body 3 are integrally formed, not as separate bodies, the inner cylinder body 2 and the outer cylinder body 3 are not displaced in the cap axis O direction and the circumferential direction. Therefore, for example, it is not necessary to take a measure to prevent slipping out as in the related art, and the configuration can be simplified. Moreover, since the labor for assembling the inner tubular body 2 and the outer tubular body 3 is unnecessary, the screw cap 1 can be efficiently manufactured.

さらには、外筒部３０が円筒状に形成されているので、外筒体３の外観に制約が生じることを抑制することができるうえ、例えば外筒部３０の外周面に塗装、印刷等の加飾を容易に施すことも可能となる。従って、ねじキャップ１全体の外観性及びデザイン性を向上させ易い。 Furthermore, since the outer cylinder portion 30 is formed in a cylindrical shape, it is possible to prevent the appearance of the outer cylinder body 3 from being restricted and, for example, to apply paint or print to the outer peripheral surface of the outer cylinder portion 30. It also becomes possible to easily decorate. Therefore, it is easy to improve the appearance and design of the screw cap 1 as a whole.

上述したように、本実施形態のねじキャップ１によれば、容器本体１００の口部１０１に対する着脱操作をスムーズに行うことができると共に、構成の簡略化を図りながら効率の良い製造を行うことができる。 As described above, according to the screw cap 1 of the present embodiment, the attachment / detachment operation of the container body 100 with respect to the mouth portion 101 can be smoothly performed, and the manufacturing can be performed efficiently while simplifying the configuration. it can.

特に上記実施形態では、開放空間Ｓが環状に形成されているうえ、下方に向けて開放されているので、外筒部３０の下端部を全周に亘って自由端とすることができる。従って、外筒部３０のどの部分を把持したとしても、外筒部３０を径方向内側に弾性変形させ易い。そのため、例えばねじキャップ１を上方から手の平で覆いながら、外筒部３０を把持した場合には、指先を外筒部３０の下端部側に自然と位置させることができるので、そのままの流れで外筒部３０の下端部を内筒部１１側に向けて容易且つ積極的に弾性変形させることが可能である。
しかも、開放空間Ｓが環状に形成されて、外筒部３０が全周に亘って内筒部１１から離間しているので、外筒部３０を内筒部１１側に向けて弾性変形させる際、その初期段階において外筒部３０をよりスムーズに弾性変形させることができる。 In particular, in the above embodiment, the open space S is formed in an annular shape and is opened downward, so that the lower end portion of the outer tubular portion 30 can be a free end over the entire circumference. Therefore, no matter which part of the outer tubular portion 30 is gripped, the outer tubular portion 30 is easily elastically deformed radially inward. Therefore, for example, when the outer cylinder portion 30 is gripped while the screw cap 1 is covered with the palm from above, the fingertip can be naturally positioned on the lower end portion side of the outer cylinder portion 30, and therefore the outer flow is performed as it is. It is possible to easily and positively elastically deform the lower end of the tubular portion 30 toward the inner tubular portion 11 side.
Moreover, since the open space S is formed in an annular shape and the outer tubular portion 30 is separated from the inner tubular portion 11 over the entire circumference, when the outer tubular portion 30 is elastically deformed toward the inner tubular portion 11 side. In the initial stage, the outer cylinder portion 30 can be elastically deformed more smoothly.

以上のことから、僅かな把持力であっても、抵抗少なく、また反応良く外筒部３０をスムーズに弾性変形させることができ、ねじキャップ１の着脱操作の操作性を向上することができる。 From the above, even with a slight gripping force, the outer cylinder portion 30 can be smoothly elastically deformed with low resistance and good reaction, and the operability of the attaching / detaching operation of the screw cap 1 can be improved.

また、内筒部１１が平面視で正六角形状に形成されているので、外筒体３を把持して、外筒部３０を内筒部１１側に向けて弾性変形させたときに、例えば２本の指先（親指や中指等）を利用して、径方向で対向する平坦壁２０同士を、外筒部３０を介して挟み込むことができる。これにより、外筒部３０を介して内筒部１１をより安定して把持し易く、内筒部１１に対して回転力を良好に伝達することができるので、ねじキャップ１の着脱操作をさらに容易に行うことができる。 Further, since the inner cylindrical portion 11 is formed in a regular hexagonal shape in a plan view, when the outer cylindrical body 3 is gripped and the outer cylindrical portion 30 is elastically deformed toward the inner cylindrical portion 11 side, for example, By using two fingertips (thumb, middle finger, etc.), the flat walls 20 facing each other in the radial direction can be sandwiched via the outer tubular portion 30. As a result, the inner tubular portion 11 can be more stably gripped via the outer tubular portion 30 and the rotational force can be satisfactorily transmitted to the inner tubular portion 11, so that the screw cap 1 can be further attached and detached. It can be done easily.

また、開放空間Ｓが下方に向けて開放されているので、図１に示すように、開放空間Ｓを外部から見え難くすることができる。従って、良好な見栄えを確保して、ねじキャップ１の外観性をさらに向上させることができる。加えて、外筒部３０を指先で把持した際に、開放空間Ｓ内に指先が入り込み難いので、外筒部３０と内筒部１１との間で指先が挟まれてしまうような不都合を抑制することができる。さらに、開放空間Ｓ内に塵埃等が入り込むことを防止し易い。 Further, since the open space S is opened downward, the open space S can be made invisible from the outside as shown in FIG. Therefore, it is possible to secure a good appearance and further improve the appearance of the screw cap 1. In addition, since it is difficult for the fingertip to enter the open space S when the outer cylinder portion 30 is gripped by the fingertip, it is possible to suppress the inconvenience that the fingertip is sandwiched between the outer cylinder portion 30 and the inner cylinder portion 11. can do. Furthermore, it is easy to prevent dust and the like from entering the open space S.

さらに、開放空間Ｓが環状に形成され、外筒部３０が全周に亘って内筒部１１から離間した円筒状に形成されているので、樹脂成形時、ひけやウェルドラインが外筒部３０の表面に現れることを防止することができる。
例えば、内筒部１１の角部２１と外筒部３０とが繋がったねじキャップを成型した場合には、外筒部３０の肉厚が、角部２１と外筒部３０とが繋がった部分と、それ以外の部分と、の間で異なり、外筒部３の肉厚が周方向で不均一になってしまう。この場合、例えば樹脂の流れが不均一になる、或いは樹脂の冷却時間の差異による収縮応力（引張応力）が樹脂内部に作用する場合があり、例えば角部２１と外筒部３０とが繋がった部分における外筒部３０の外表面に、ひけやウェルドラインが表れてしまう可能性がある。そのため、外筒部３０の外観性が低下するおそれがあった。特に、パール顔料を合成樹脂材料に混ぜて成形（射出成形等）を行った場合や、蒸着、塗装等の加飾（表面加飾）を行った場合等には、ひけやウェルドラインが目立ち易くなってしまい、外筒部３０の外観性、加飾性が低下し易い。
この点、上記実施形態のように開放空間Ｓを環状に形成した場合には、樹脂成形によるひけやウェルドラインが外筒部３０の表面に現れることを防止することができるので、外筒部３０の外観性、及び加飾性の低下を効果的に抑えることができる。 Further, since the open space S is formed in an annular shape and the outer cylinder portion 30 is formed in a cylindrical shape that is separated from the inner cylinder portion 11 over the entire circumference, the sink mark and the weld line are formed in the outer cylinder portion 30 during resin molding. Can be prevented from appearing on the surface of.
For example, when a screw cap in which the corner portion 21 of the inner tubular portion 11 and the outer tubular portion 30 are connected is molded, the wall thickness of the outer tubular portion 30 is the portion where the corner portion 21 and the outer tubular portion 30 are connected. And the other portions, the wall thickness of the outer cylindrical portion 3 becomes uneven in the circumferential direction. In this case, for example, the flow of the resin may become non-uniform, or contraction stress (tensile stress) due to the difference in the cooling time of the resin may act inside the resin. For example, the corner portion 21 and the outer cylinder portion 30 are connected. A sink mark or a weld line may appear on the outer surface of the outer tubular portion 30 in the portion. Therefore, the appearance of the outer cylinder portion 30 may be deteriorated. Especially when the pearl pigment is mixed with the synthetic resin material for molding (injection molding, etc.), or when decoration such as vapor deposition or painting (surface decoration) is performed, sink marks and weld lines are easily noticeable. As a result, the appearance and decoration of the outer cylinder portion 30 are likely to deteriorate.
In this respect, when the open space S is formed in an annular shape as in the above embodiment, it is possible to prevent sink marks and weld lines due to resin molding from appearing on the surface of the outer tubular portion 30, and thus the outer tubular portion 30. It is possible to effectively suppress the deterioration of the appearance and the decoration.

さらに、外筒部３０が内筒部１１よりも下方に突出しているので、例えば外筒部３０の外周面に印刷や塗装等の加飾を施すときに、外筒部３０の下端部の内側に、外筒部３０の内側全体を覆って内筒体２を隠すマスク部材を嵌合させることが可能である。
これにより、外筒部３０の内側及び内筒体２への影響を気にすることなく、外筒部３０の外周面に限って加飾を適切且つ容易に行うことができる。 Furthermore, since the outer tubular portion 30 projects below the inner tubular portion 11, for example, when the outer peripheral surface of the outer tubular portion 30 is decorated by printing or painting, the inner portion of the lower end portion of the outer tubular portion 30 is inside. It is possible to fit a mask member that covers the entire inner side of the outer tubular portion 30 and hides the inner tubular body 2.
Thereby, the decoration can be appropriately and easily performed only on the outer peripheral surface of the outer tubular portion 30 without worrying about the influence on the inner side of the outer tubular portion 30 and the inner tubular body 2.

次に、外筒部３０の弾性変形の容易性について、実際に試験により確認した実施例について説明する。
本試験では、図２に示すねじキャップ１を用意し、外筒部３０の直径２を約４０ｍｍ、肉厚を０．５ｍｍとした。そして、外筒部３０のうち平坦壁２０の径方向外側に位置する部分を、直径２０ｍｍの円柱ロッドを利用して径方向外側から押圧することで外筒部３０を径方向内側に５ｍｍ分だけ弾性変形させ、そのときの押圧力を測定した。
なお、円柱ロッドは、その中心軸線をキャップ軸Ｏ方向に沿わせた状態で使用し、円柱ロッドの外周面を利用して外筒部３０を径方向外側から押圧した。 Next, with respect to the easiness of elastic deformation of the outer cylinder portion 30, an example actually confirmed by a test will be described.
In this test, the screw cap 1 shown in FIG. 2 was prepared, and the outer cylinder 30 had a diameter 2 of about 40 mm and a wall thickness of 0.5 mm. Then, by pressing a portion of the outer tubular portion 30 located on the outer side in the radial direction of the flat wall 20 from the outer side in the radial direction using a cylindrical rod having a diameter of 20 mm, the outer tubular portion 30 is moved to the inner side in the radial direction by 5 mm. It was elastically deformed and the pressing force at that time was measured.
The cylindrical rod was used with its center axis aligned with the direction of the cap axis O, and the outer cylindrical portion 30 was pressed from the outside in the radial direction using the outer peripheral surface of the cylindrical rod.

その結果、外筒部３０を径方向内側に５ｍｍ分だけ弾性変形させるのに必要な押圧力（荷重）は、約０．７４Ｎ（約０．０７５ｋｇｆ）であった。従って、僅かな押圧力で外筒部３０を実際に弾性変形させ易いという傾向を得ることができ、本発明の作用効果を実際に確認することができた。 As a result, the pressing force (load) required to elastically deform the outer tubular portion 30 radially inward by 5 mm was about 0.74 N (about 0.075 kgf). Therefore, it is possible to obtain a tendency that the outer cylinder portion 30 is actually easily elastically deformed with a slight pressing force, and it is possible to actually confirm the action and effect of the present invention.

また、図２に示すねじキャップ１の変形例として、内筒部１１の角部２１に対して外筒部３０が接触したねじキャップを用意し、これについても同様の試験を行った。この場合には、内筒部１１の角部２１に対して外筒部３０が接触しているので、周方向に隣り合う角部２１と平坦壁２０と外筒部３０との間に開放空間Ｓが形成され、この開放空間Ｓが周方向に間隔をあけて配置されている。
本変形例のねじキャップでは、開放空間Ｓが環状に形成されていない点が異なるだけで、その他の構成は変更がない。 As a modified example of the screw cap 1 shown in FIG. 2, a screw cap in which the outer cylinder portion 30 is in contact with the corner portion 21 of the inner cylinder portion 11 was prepared, and the same test was performed for this. In this case, since the outer cylinder portion 30 is in contact with the corner portion 21 of the inner cylinder portion 11, an open space is formed between the corner portion 21 adjacent to the circumferential direction, the flat wall 20, and the outer cylinder portion 30. S is formed, and the open spaces S are arranged at intervals in the circumferential direction.
The screw cap of the present modification is different only in that the open space S is not formed in an annular shape, and other configurations are not changed.

本変形例のねじキャップについて、上記と同様の試験を行った結果、外筒部３０を径方向内側に５ｍｍ分だけ弾性変形させるのに必要な押圧力は、約２．３２Ｎ（約０．２３７ｋｇｆ）であった。
従って、この場合も同様に僅かな押圧力で外筒部３０を実際に弾性変形させ易いという傾向を得ることができ、本発明の作用効果を実際に確認することができた。 As a result of performing the same test as the above with respect to the screw cap of the present modification, the pressing force required for elastically deforming the outer tubular portion 30 by 5 mm inward in the radial direction is about 2.32 N (about 0.237 kgf). )Met.
Therefore, in this case as well, it is possible to obtain a tendency that the outer cylinder portion 30 is actually easily elastically deformed even with a small pressing force, and the operational effects of the present invention can be actually confirmed.

ただし、本変形例の場合には、押圧力の数値自体は低いものの、図２に示すねじキャップ１と比較した場合には押圧力が３倍程度高い。これは、図２に示すねじキャップ１の場合には、開放空間Ｓが環状に形成されているので、外筒部３０が角部２１の影響（角部２１からの反力）を受け難く、よりスムーズに弾性変形した結果である。
従って、外筒部３０をより抵抗少なくスムーズに弾性変形させる場合には、上記実施形態のねじキャップ１のように、開放空間Ｓを環状に形成したえで、下方に開放させることが、より効果的であることを確認することができた。 However, in the case of this modification, although the numerical value of the pressing force itself is low, the pressing force is about three times higher than that of the screw cap 1 shown in FIG. In the case of the screw cap 1 shown in FIG. 2, this is because the open space S is formed in an annular shape, so that the outer cylinder portion 30 is less likely to be affected by the corner portion 21 (reaction force from the corner portion 21). This is the result of smoother elastic deformation.
Therefore, when the outer tubular portion 30 is elastically deformed smoothly with less resistance, it is more effective to open the open space S in the annular shape like the screw cap 1 of the above-described embodiment so that the open space S is opened downward. I was able to confirm that it was the target.

なお、本発明の技術範囲は、上記実施形態に限定されるものではなく、本発明の趣旨を逸脱しない範囲において、種々の変更を加えることが可能である。 The technical scope of the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.

例えば、上記実施形態では、内筒部１１及び外筒部３０の間に環状の開放空間Ｓを画成した場合を例に挙げて説明したが、開放空間Ｓは環状に限定されるものではない。例えば、上記実施形態で述べたように、内筒部１１の角部２１に対して接触するように外筒部３０を構成し、周方向に隣り合う角部２１と平坦壁２０と外筒部３０との間に開放空間Ｓを画成しても構わない。この場合には、内筒部１１と外筒部３０との間に、開放空間Ｓを周方向に間隔をあけて配置させることができる。
この場合であっても、同様の作用効果を奏功することができる。ただし、上述の実施例で述べたように、開放空間Ｓを環状に形成することで、外筒部３０が角部２１からの反力を受け難くなるので、よりスムーズに弾性変形し易くなり、好ましい。 For example, in the above embodiment, the case where the annular open space S is defined between the inner cylinder part 11 and the outer cylinder part 30 has been described as an example, but the open space S is not limited to the annular shape. .. For example, as described in the above embodiment, the outer tubular portion 30 is configured so as to come into contact with the corner portion 21 of the inner tubular portion 11, and the corner portion 21 adjacent to the circumferential direction, the flat wall 20, and the outer tubular portion are arranged. An open space S may be defined between 30 and 30. In this case, the open spaces S can be arranged at intervals in the circumferential direction between the inner tubular portion 11 and the outer tubular portion 30.
Even in this case, the same effect can be achieved. However, as described in the above-described embodiment, by forming the open space S in an annular shape, the outer tubular portion 30 is less likely to receive a reaction force from the corner portion 21, so that it is easier to elastically deform, preferable.

また、開放空間Ｓを下方に開放させたが、この場合に限定されるものではなく、例えばキャップ天壁４に該キャップ天壁４をキャップ軸Ｏ方向に貫通する貫通孔を形成し、貫通孔を通じて上方に開放させても構わない。 Further, although the open space S is opened downward, the present invention is not limited to this case. For example, a through hole that penetrates the cap top wall 4 in the cap axis O direction is formed in the cap top wall 4, and the through hole is formed. It may be opened upward through.

また、装着筒部１０と内筒部１１とが連結リブ２２を介して径方向に一体に連結された内筒体２としたが、例えば装着筒部１０と内筒部１１との間に隙間を設けずに、装着筒部１０と内筒部１１とが一体に形成された筒体としても構わない。この場合には、筒体の内側の形状を平面視で円形状に形成したうえで、筒体の内周面に第２ねじ部１３を形成し、筒体の外側の形状を平面視で角形状に形成すれば良い。この場合であっても、同様の作用効果を奏功することができる。
ただし、上記実施形態のように、装着筒部１０と内筒部１１とを連結リブ２２を介して径方向に一体に連結して、装着筒部１０と内筒部１１との間に隙間を設けることで、ねじキャップ１の成形時にひけが生じることを効果的に抑えることができ好ましい。 Further, although the mounting cylinder portion 10 and the inner cylinder portion 11 are the inner cylindrical body 2 integrally connected in the radial direction via the connecting ribs 22, for example, a gap is provided between the mounting cylinder portion 10 and the inner cylinder portion 11. Alternatively, the mounting cylinder portion 10 and the inner cylinder portion 11 may be integrally formed without providing the above. In this case, the inner shape of the cylindrical body is formed into a circular shape in plan view, and then the second screw portion 13 is formed on the inner peripheral surface of the cylindrical body so that the outer shape of the cylindrical body is square in plan view. It may be formed in a shape. Even in this case, the same effect can be achieved.
However, as in the above-described embodiment, the mounting tubular portion 10 and the inner tubular portion 11 are integrally connected in the radial direction via the connecting rib 22, and a gap is provided between the mounting tubular portion 10 and the inner tubular portion 11. By providing, it is possible to effectively suppress the occurrence of sink marks during the molding of the screw cap 1, which is preferable.

さらに、上記実施形態では、外筒部３０を内筒部１１よりも下方に突出するように形成したが、外筒部３０及び内筒部１１の長さを同じにしても構わない。特に、マスク部材を用いることなく、外筒部３０の外周面に加飾を施す場合や、肩部がフラットな容器本体にねじキャップを螺着する場合等には有効である。 Furthermore, in the above-described embodiment, the outer tubular portion 30 is formed so as to project below the inner tubular portion 11, but the outer tubular portion 30 and the inner tubular portion 11 may have the same length. In particular, it is effective when the outer peripheral surface of the outer tubular portion 30 is decorated without using a mask member, or when a screw cap is screwed onto a container body having a flat shoulder.

Ｏ…キャップ軸
Ｓ…開放空間
１…ねじキャップ
２…内筒体
３…外筒体
４…キャップ天壁
１１…内筒部
２０…平坦壁
２１…角部
３０…外筒部
１００…容器本体
１０１…容器本体の口部 O ... Cap shaft S ... Open space 1 ... Screw cap 2 ... Inner cylinder 3 ... Outer cylinder 4 ... Cap top wall 11 ... Inner cylinder 20 ... Flat wall 21 ... Corner 30 ... Outer cylinder 100 ... Container body 101 ... Mouth of container body

Claims

An inner cylindrical body screwed to the mouth of the container body,
An outer cylinder body that is integrally formed with the inner cylinder body and that surrounds the inner cylinder body from the outside in the radial direction,
The inner cylindrical body includes an inner cylindrical portion formed in a square shape in a plan view when viewed from the axial direction of the cap,
The outer cylindrical body is formed in a circular shape in a plan view as viewed from the axial direction of the cap, and is provided with an outer cylindrical portion that is thinner than the inner cylindrical portion and is elastically deformable,
A screw cap, wherein an open space opened in one of the axial directions of the cap is defined between the outer peripheral surface of the inner cylindrical portion and the inner peripheral surface of the outer cylindrical portion.

The screw cap according to claim 1,
The screw cap is opened toward the open end side of each of the inner tubular portion and the outer tubular portion.

The screw cap according to claim 1 or 2,
The inner cylindrical portion is a screw cap in which an even number of flat walls are formed in a rectangular shape connected in the circumferential direction.

The screw cap according to any one of claims 1 to 3,
The said open space is a screw cap formed between the said inner cylinder part and the said outer cylinder part over the whole circumference of the said inner cylinder part and the said outer cylinder part annularly.

The screw cap according to any one of claims 1 to 4,
A screw cap, wherein an open end of the outer tubular portion projects toward an opposite side of the open end of the inner tubular portion from the cap top wall in the axial direction of the cap.