JP2024175746A

JP2024175746A - Spout and dispensing unit

Info

Publication number: JP2024175746A
Application number: JP2023093712A
Authority: JP
Inventors: 創哉吉田; Soya YOSHIDA; 雅浩竹中; Masahiro Takenaka; 泰地阿部; Taiji Abe; 慎二大森; Shinji Omori; 知島田; Satoru Shimada; 祐香杉山; Yuka Sugiyama
Original assignee: Nippon Closures Co Ltd; Toyo Seikan Kaisha Ltd
Current assignee: Nippon Closures Co Ltd; Toyo Seikan Group Holdings Ltd
Priority date: 2023-06-07
Filing date: 2023-06-07
Publication date: 2024-12-19
Also published as: WO2024252902A1; TW202448760A

Abstract

To provide a spout and an injection unit capable of improving sealing properties between an inner peripheral face of a spout cylindrical part and an outer peripheral face of a connector injection cylindrical part.SOLUTION: There is provided a spout 20 which is connected to a connector 30 in a state where a connector injection cylindrical part 31 is inserted into a spout cylindrical part 21. The spout cylindrical part 21 comprises: an upper side screw region 23 where a spout screw part 23b is formed on its outer peripheral face; and a spout lower side region 24 formed so as to be adjacent to a lower side of the upper side screw region 23. The spout lower side region 24 has a sealing taper inner peripheral face 24a which is formed so as to expand in diameter as going to upward, and can tightly contact an outer peripheral face of the connector injection cylindrical part 31. In the spout 20, the whole region of an inner peripheral face of the upper side screw region 23 is positioned closer to an outer periphery side, relative to a virtual taper surface T to which the sealing taper inner peripheral face 24a is upward extended.SELECTED DRAWING: Figure 3

Description

本発明は、スパウトおよび注出ユニットに関する。 The present invention relates to a spout and a dispensing unit.

従来から、経腸栄養においては、患者に投与される栄養剤を含む内容液をパウチ等の容器（バッグ）に充填したＲＴＨ（ＲｅａｄｙＴｏＨａｎｇ）製剤が広く用いられている。このようなＲＴＨ製剤では、内容液を充填した容器の注出口にスパウトを取り付け、内容液を患者に投与する直前にスパウトを開封し、この開封されたスパウトに対して、その一端が患者の体内に挿入されるカテーテルの他端側に接続されたコネクタを接続することで、患者に対して栄養剤を含む内容液を投与することが行われている。 Conventionally, in enteral nutrition, RTH (Ready To Hang) preparations, in which a liquid content containing a nutrient to be administered to a patient is filled in a container (bag) such as a pouch, have been widely used. In such RTH preparations, a spout is attached to the outlet of the container filled with the liquid content, and the spout is opened just before the liquid content is administered to the patient. One end of the opened spout is connected to a connector connected to the other end of a catheter inserted into the patient's body, and the liquid content containing the nutrient is administered to the patient.

このようなスパウトおよびコネクタでは、近年、栄養系の医療機器に関する国際規格ＩＳＯ８０３６９－３の関係で、スパウトに形成されたスパウト筒状部（メスコネクタ部）内に、コネクタに形成されたコネクタ注出筒部（オスコネクタ部）を挿入するという、コネクタ接続形態が採用され始めている（例えば特許文献１を参照）。 In recent years, in relation to such spouts and connectors, in accordance with the international standard ISO 80369-3 for nutritional medical devices, a connector connection configuration has begun to be adopted in which the connector injection tube portion (male connector portion) formed on the connector is inserted into the spout tube portion (female connector portion) formed on the spout (see, for example, Patent Document 1).

特開２０２０－０３３０８４号公報JP 2020-033084 A

ところが、本出願人がこのようなスパウトおよびコネクタを含む注出ユニットについて開発を進めていく中で、スパウト筒状部の内周面とコネクタ注出筒部の外周面との間の密封性について改善の余地があることが分かった。 However, as the applicant continued to develop a pouring unit including such a spout and connector, it became clear that there was room for improvement in the sealing between the inner circumferential surface of the spout cylindrical portion and the outer circumferential surface of the connector pouring cylindrical portion.

そこで、本発明は、これらの問題点を解決するものであり、簡素な構成で、スパウト筒状部の内周面とコネクタ注出筒部の外周面との間の密封性を向上するスパウトおよび注出ユニットを提供することを目的とするものである。 The present invention aims to solve these problems by providing a spout and a spout unit that has a simple configuration and improves the sealing between the inner surface of the spout cylindrical portion and the outer surface of the connector spout cylindrical portion.

本発明のスパウトは、スパウト筒状部内にコネクタ注出筒部が挿入された状態でコネクタに接続されるスパウトであって、前記スパウト筒状部は、その外周面にスパウトネジ部が形成された上方側ネジ付き領域と、前記上方側ネジ付き領域の下方側に隣接して形成されたスパウト下方側領域とを有し、前記スパウト下方側領域は、上方に向かうに従って拡径するように形成された、前記コネクタ注出筒部の外周面と密着可能な密封用テーパ内周面を有し、前記上方側ネジ付き領域の内周面は、その全域が、前記密封用テーパ内周面を上方側に延長させた仮想テーパ面よりも外周側に位置していることにより、前記課題を解決するものである。
本発明の注出ユニットの一態様は、前記スパウトと、前記コネクタとを備えることにより、前記課題を解決するものである。
本発明の注出ユニットの他の態様は、スパウトとコネクタとを備え、スパウト筒状部内にコネクタ注出筒部が挿入された状態で前記スパウトに対して前記コネクタが接続される注出ユニットであって、前記スパウト筒状部は、その外周面にスパウトネジ部が形成された上方側ネジ付き領域と、前記上方側ネジ付き領域の下方側に隣接して形成されたスパウト下方側領域とを有し、前記スパウト下方側領域は、上方に向かうに従って拡径するように形成された、前記コネクタ注出筒部の外周面と密着可能な密封用テーパ内周面を有し、前記コネクタ注出筒部は、前記スパウトに対して前記コネクタを接続した状態で、前記上方側ネジ付き領域の内周側に配置されるコネクタ上方側領域と、前記スパウト下方側領域の内周側に配置されるコネクタ下方側領域とを有し、前記コネクタ下方側領域は、前記スパウトに対して前記コネクタを接続した状態で、前記密封用テーパ内周面との間に第１締め代が生じるように、前記密封用テーパ内周面の内周側に挿入される密封用テーパ外周面を有し、前記コネクタ上方側領域は、前記スパウトに対して前記コネクタを接続した状態で、前記上方側ネジ付き領域との間に前記第１締め代よりも小さい締め代が生じる、または、前記上方側ネジ付き領域との間に締め代を生じることなく前記上方側ネジ付き領域との内周面に接触するように、または、前記上方側ネジ付き領域との間に間隔が生じるように、前記上方側ネジ付き領域内に挿入されることにより、前記課題を解決するものである。
上記のいずれかのスパウトまたは注出ユニットでは、前記密封用テーパ内周面は、その上端位置が前記スパウト下方側領域の上端位置に一致するように形成されていてもよい。
上記のいずれかのスパウトまたは注出ユニットでは、前記上方側ネジ付き領域は、上方に向かうに従って拡径するように形成された上方側テーパ内周面を有し、前記上方側テーパ内周面の上下方向に対する傾斜角度は、前記密封用テーパ内周面の上端部分の上下方向に対する傾斜角度よりも大きくてもよい。
上記のいずれかのスパウトまたは注出ユニットでは、前記上方側ネジ付き領域および前記スパウト下方側領域の内周面は、その全域に亘って、上方側に向かうに従って拡径するテーパ状に形成されていてもよい。
上記のいずれかのスパウトまたは注出ユニットでは、前記スパウト筒状部は、前記スパウト下方側領域の内周面の下方側に隣接して形成された第３テーパ内周面を有し、前記第３テーパ内周面は、上方に向かうに従って拡径するように形成され、前記第３テーパ内周面の上下方向に対する傾斜角度は、前記密封用テーパ内周面の上端部分の上下方向に対する傾斜角度よりも大きくてもよい。
上記のいずれかのスパウトまたは注出ユニットでは、前記コネクタ注出筒部は、前記スパウトに対して前記コネクタを接続した状態で、前記上方側ネジ付き領域の内周側に挿入されるコネクタ上方側領域と、前記スパウト下方側領域の内周側に挿入されるコネクタ下方側領域とを有し、前記コネクタ下方側領域は、前記スパウトに対して前記コネクタを接続した状態で、前記密封用テーパ内周面との間に第１締め代が生じるように、前記密封用テーパ内周面の内周側に挿入される密封用テーパ外周面を有し、前記コネクタ上方側領域は、前記スパウトに対して前記コネクタを接続した状態で、前記上方側ネジ付き領域との間に前記第１締め代よりも小さい締め代が生じるように、または、前記上方側ネジ付き領域との間に締め代を生じることなく前記上方側ネジ付き領域の内周面に接触するように、または、前記上方側ネジ付き領域との間に間隔が生じるように、前記上方側ネジ付き領域内に挿入されてもよい。
上記のいずれかのスパウトまたは注出ユニットでは、前記コネクタ下方側領域の外周面は、その全域に亘って、上方側に向かうに従って拡径するテーパ状に形成されていてもよい。
上記のいずれかのスパウトまたは注出ユニットでは、前記コネクタは、前記スパウトネジ部に螺合可能なコネクタネジ部を有していてもよい。
上記のいずれかの注出ユニットでは、前記注出ユニットは、前記スパウトに装着可能なキャップを更に備え、前記スパウト筒状部は、前記上方側ネジ付き領域よりも上方側の上端側領域を有し、前記キャップは、前記スパウトに対して装着された状態で、前記上端側領域の外周面に接触するアウターリング部と、前記上端側領域の内周面に接触するインナーリング部と、前記上端側領域の上端面に接触するコンタクトリング部とを有していてもよい。 The spout of the present invention is a spout that is connected to a connector with a connector injection tubular portion inserted into the spout tubular portion, wherein the spout tubular portion has an upper threaded region having a spout thread portion formed on its outer surface, and a spout lower region formed adjacent to the lower side of the upper threaded region, and the spout lower region has a sealing tapered inner surface that is formed to expand in diameter as it extends upward and is capable of coming into close contact with the outer surface of the connector injection tubular portion, and the inner surface of the upper threaded region is located entirely outer than a virtual tapered surface that extends upward from the sealing tapered inner surface, thereby solving the above-mentioned problem.
One aspect of the dispensing unit of the present invention solves the above problem by including the spout and the connector.
Another aspect of the spout unit of the present invention is a spout and a connector, and the connector is connected to the spout with the connector spout pipe inserted into the spout pipe, the spout pipe having an upper threaded region on its outer circumferential surface and a spout lower region formed adjacent to the lower side of the upper threaded region, the spout lower region having a sealing tapered inner circumferential surface that is formed to increase in diameter as it extends upward and is capable of being in close contact with the outer circumferential surface of the connector spout pipe, the connector spout pipe has a connector upper region disposed on the inner circumferential side of the upper threaded region and a spout lower region formed adjacent to the outer circumferential surface of the connector spout pipe when the connector is connected to the spout. The connector has a lower connector region arranged on the inner side, the lower connector region having a sealing taper outer peripheral surface that is inserted into the inner side of the sealing taper inner surface so that a first tightening margin is created between the lower connector region and the sealing taper inner peripheral surface when the connector is connected to the spout, and the upper connector region is inserted into the upper threaded region so that, when the connector is connected to the spout, a tightening margin smaller than the first tightening margin is created between the upper threaded region and the upper threaded region, or so that the upper connector region contacts the inner surface of the upper threaded region without creating a tightening margin between the upper threaded region and the upper threaded region, or so that a gap is created between the upper threaded region and the upper threaded region, thereby solving the above problem.
In any of the above spouts or pouring units, the sealing tapered inner circumferential surface may be formed such that its upper end position coincides with the upper end position of the spout lower region.
In any of the above spouts or pouring units, the upper threaded region has an upper tapered inner surface formed so as to widen in diameter as it extends upward, and the angle of inclination of the upper tapered inner surface in the vertical direction may be greater than the angle of inclination of the upper end portion of the sealing tapered inner surface in the vertical direction.
In any of the above spouts or dispensing units, the inner circumferential surfaces of the upper threaded region and the spout lower region may be tapered over their entire areas, increasing in diameter as they extend upward.
In any of the above spouts or pouring units, the spout cylindrical portion has a third tapered inner surface formed adjacent to the lower side of the inner surface of the spout lower region, the third tapered inner surface being formed so as to increase in diameter as it extends upward, and the inclination angle of the third tapered inner surface in the vertical direction may be greater than the inclination angle of an upper end portion of the sealing tapered inner surface in the vertical direction.
In any of the spouts or pouring units described above, the connector pouring tube portion has an upper connector region that is inserted into the inner peripheral side of the upper threaded region and a lower connector region that is inserted into the inner peripheral side of the spout lower region when the connector is connected to the spout, and the lower connector region has a sealing taper outer peripheral surface that is inserted into the inner peripheral side of the sealing taper inner peripheral surface so that a first tightening margin is generated between the upper connector region and the sealing taper inner peripheral surface when the connector is connected to the spout, and the upper connector region may be inserted into the upper threaded region so that a tightening margin smaller than the first tightening margin is generated between the upper connector region and the upper threaded region, or so that the upper connector region contacts the inner peripheral surface of the upper threaded region without generating a tightening margin between the upper connector region and the upper threaded region, or so that a gap is generated between the upper connector region and the upper threaded region when the connector is connected to the spout.
In any of the above spouts or pouring units, the outer circumferential surface of the connector lower region may be formed in a tapered shape that increases in diameter toward the upper side over its entire area.
In any of the above spouts or spout units, the connector may have a connector thread portion that is capable of being screwed into the spout thread portion.
In any of the above-mentioned dispensing units, the dispensing unit may further include a cap that can be attached to the spout, the spout cylindrical portion having an upper end region above the upper threaded region, and the cap, when attached to the spout, may have an outer ring portion that contacts the outer peripheral surface of the upper end region, an inner ring portion that contacts the inner peripheral surface of the upper end region, and a contact ring portion that contacts the upper end surface of the upper end region.

本発明によれば、簡素な構成で、スパウト筒状部の内周面とコネクタ注出筒部の外周面との間の密封性を向上することができる。 The present invention provides a simple configuration that improves the sealing between the inner circumferential surface of the spout cylindrical portion and the outer circumferential surface of the connector injection/dispensing cylindrical portion.

本発明の一実施形態に係るスパウトを示す説明図。FIG. 2 is an explanatory diagram showing a spout according to one embodiment of the present invention. スパウト筒状部の内周面の態様を説明する説明図。FIG. 4 is an explanatory diagram illustrating the state of the inner circumferential surface of the spout cylindrical portion. スパウトに対してコネクタを接続した状態を示す説明図。FIG. 13 is an explanatory diagram showing the state in which the connector is connected to the spout. スパウトおよびコネクタを示す説明図。FIG. 2 is an explanatory diagram showing a spout and a connector. スパウトに対してキャップを装着した状態を示す説明図。FIG. 4 is an explanatory diagram showing the state in which the cap is attached to the spout.

以下に、本発明の一実施形態に係る注出ユニット１０について、図面に基づいて説明する。 Below, the dispensing unit 10 according to one embodiment of the present invention is described with reference to the drawings.

まず、注出ユニット１０は、図１～図５に示すように、経腸栄養用の栄養剤を含む内容液が充填されたパウチ等の容器（図示しない）の注出口に装着されるスパウト２０と、スパウト２０に接続可能に構成されたコネクタ３０と、スパウト２０に装着可能なキャップ４０とを備えている。 First, as shown in Figures 1 to 5, the dispensing unit 10 includes a spout 20 that is attached to the spout of a container (not shown) such as a pouch filled with a liquid content including a nutritional agent for enteral nutrition, a connector 30 that is configured to be connectable to the spout 20, and a cap 40 that can be attached to the spout 20.

以下、各構成要素の具体的構成について、図面に基づいて説明する。 The specific configuration of each component is explained below with reference to the drawings.

まず、スパウト２０は、合成樹脂等から成る射出成形品として形成され、図１に示すように、内容液を注出するための上下方向に沿って延びる注出流路２１ａを内側に有した筒状のスパウト筒状部２１と、熱溶着によって容器に装着される容器用取付部２６とを一体に備え、図３に示すように、そのスパウト筒状部２１内にコネクタ注出筒部３１が挿入された状態でコネクタ３０に接続されるものである。 First, the spout 20 is formed as an injection molded product made of synthetic resin or the like, and as shown in FIG. 1, is integrally provided with a cylindrical spout tubular portion 21 having an internal pouring flow path 21a extending in the vertical direction for pouring out the liquid content, and a container attachment portion 26 that is attached to the container by thermal welding, and as shown in FIG. 3, is connected to the connector 30 with the connector pouring tubular portion 31 inserted into the spout tubular portion 21.

スパウト筒状部２１は、容器用取付部２６から上方側に向けて突出して形成され、図１に示すように、その上端側に形成された上端側領域２２と、上端側領域２２の下方側に隣接し、その外周面にスパウトネジ部２３ｂが突出して形成された上方側ネジ付き領域２３と、上方側ネジ付き領域２３の下方側に隣接して形成された領域であって、コネクタ３０との接続時にコネクタ注出筒部３１の外周面と密着可能な密封用テーパ内周面２４ａを有したスパウト下方側領域２４と、スパウト下方側領域２４の下方側に隣接して形成された突出部付き領域２５とを有している。 The spout tubular portion 21 is formed to protrude upward from the container mounting portion 26, and as shown in FIG. 1, has an upper end region 22 formed on its upper end side, an upper threaded region 23 adjacent to the lower side of the upper end region 22 and having a spout threaded portion 23b protruding from its outer circumferential surface, a spout lower region 24 formed adjacent to the lower side of the upper threaded region 23 and having a sealing tapered inner circumferential surface 24a that can be in close contact with the outer circumferential surface of the connector pouring/discharging tubular portion 31 when connected to the connector 30, and a protruding portion region 25 formed adjacent to the lower side of the spout lower region 24.

以下に、スパウト筒状部２１の各部２２～２５の内周面の態様について説明する。 The following describes the configuration of the inner circumferential surface of each of the sections 22 to 25 of the spout cylindrical section 21.

まず、上端側領域２２の内周面２２ａは、図２に示すように、その全域が、密封用テーパ内周面２４ａを上方側に延長させた（すなわち、密封用テーパ内周面２４ａの上端側部分を上方側に延長させた）仮想テーパ面Ｔよりも外周側に位置するように形成されている。
ここで、図２においては、発明の理解を容易にするために、上端側領域２２および上方側ネジ付き領域２３の内周面の傾斜角度を誇張して（他の図よりも上下方向に対する傾斜角度を大きく）描いている。 First, as shown in FIG. 2, the inner surface 22a of the upper end region 22 is formed so that its entire area is located outer than a virtual tapered surface T formed by extending the sealing tapered inner surface 24a upward (i.e., by extending the upper end portion of the sealing tapered inner surface 24a upward).
Here, in FIG. 2, in order to make it easier to understand the invention, the inclination angles of the inner circumferential surfaces of the upper end region 22 and the upper threaded region 23 are exaggerated (the inclination angle in the vertical direction is larger than in other figures).

なお、本実施形態では、上端側領域２２の内周面２２ａは、図１や図２に示すように、その全域に亘って、上方に向かうに従って拡径するようにテーパ状に形成されているが、上端側領域２２の内周面２２ａの具体的態様は、テーパ状のものに限定されず、例えば、その上下方向の少なくとも一部領域に、上下方向に平行な筒状（円筒状）の部分を有していてもよい。 In this embodiment, the inner peripheral surface 22a of the upper end region 22 is tapered over its entire area so that the diameter increases in the upward direction as shown in Figures 1 and 2. However, the specific form of the inner peripheral surface 22a of the upper end region 22 is not limited to a tapered shape, and may have, for example, a tubular (cylindrical) portion parallel to the vertical direction in at least a portion of the vertical direction.

また、上方側ネジ付き領域２３は、図１や図２に示すように、上方に向かうに従って拡径するようにテーパ状に形成された上方側テーパ内周面２３ａを有しており、本実施形態では、上方側ネジ付き領域２３の内周面の全域が、上方側テーパ内周面２３ａから構成されている。
上方側テーパ内周面２３ａの上下方向に対する傾斜角度は、（上方側テーパ内周面２３ａの上下方向のいずれの位置においても、）密封用テーパ内周面２４ａの上端部分の上下方向に対する傾斜角度よりも大きい。
このように形成された上方側ネジ付き領域２３の内周面は、図２に示すように、その全域が、密封用テーパ内周面２４ａを上方側に延長させた（すなわち、密封用テーパ内周面２４ａの上端側部分を上方側に延長させた）仮想テーパ面Ｔよりも外周側に位置している。 In addition, as shown in Figures 1 and 2, the upper threaded region 23 has an upper tapered inner surface 23a that is tapered so that the diameter increases toward the top, and in this embodiment, the entire inner surface of the upper threaded region 23 is composed of the upper tapered inner surface 23a.
The inclination angle of the upper tapered inner surface 23a in the vertical direction is greater than the inclination angle of the upper end portion of the sealing tapered inner surface 24a in the vertical direction (at any position in the vertical direction of the upper tapered inner surface 23a).
As shown in FIG. 2, the inner surface of the upper threaded region 23 thus formed is located, throughout its entirety, on the outer periphery of a virtual tapered surface T formed by extending the sealing tapered inner surface 24a upward (i.e., by extending the upper end portion of the sealing tapered inner surface 24a upward).

なお、本実施形態では、上方側ネジ付き領域２３の内周面が、その全域に亘って上方側テーパ内周面２３ａから構成され、言い換えると、その全域に亘って上方側に向かうに従って拡径するテーパ状に形成されているが、上方側ネジ付き領域２３の内周面の具体的態様はこれに限定されず、例えば、その上下方向の少なくとも一部領域に、上下方向に平行な筒状（円筒状）の部分を有していてもよい。
また、本実施形態では、上方側テーパ内周面２３ａが、その全域に亘って上下方向に対する傾斜角度が同一の（傾斜角度が変わらない）テーパ部のみから形成されているが、上方側テーパ内周面２３ａの具体的態様は、同一の傾斜角度で形成されたものに限定されず、傾斜角度が異なる複数のテーパ部から構成されるものや、上下方向の位置によって傾斜角度が変化するもの等、如何なるものでもよい。 In this embodiment, the inner surface of the upper threaded region 23 is composed of an upper tapered inner surface 23a over its entire area, in other words, it is formed in a tapered shape that increases in diameter toward the upward side over its entire area. However, the specific form of the inner surface of the upper threaded region 23 is not limited to this, and for example, it may have a tubular (cylindrical) portion that is parallel to the vertical direction in at least a portion of its vertical area.
In addition, in this embodiment, the upper tapered inner surface 23a is formed only from tapered sections that have the same inclination angle with respect to the vertical direction throughout its entire area (the inclination angle does not change), but the specific form of the upper tapered inner surface 23a is not limited to one formed with the same inclination angle, and may be any type, such as one composed of multiple tapered sections with different inclination angles, or one in which the inclination angle changes depending on the vertical position.

また、スパウト下方側領域２４は、図１や図２に示すように、上方に向かうに従って拡径するようにテーパ状に形成され、コネクタ３０との接続時にコネクタ注出筒部３１の外周面（コネクタ下方側領域３４の密封用テーパ外周面３４ａ）と密着可能な密封用テーパ内周面２４ａを有している。
本実施形態では、密封用テーパ内周面２４ａは、図１や図２に示すように、その上端位置がスパウト下方側領域２４の上端位置（すなわち、上方側ネジ付き領域２３の下端位置）に一致するように形成され、更に具体的には、スパウト下方側領域２４の全域が、密封用テーパ内周面２４ａから構成されている。 As shown in Figures 1 and 2, the spout lower region 24 is tapered so that its diameter increases toward the top, and has a sealing tapered inner surface 24a that can be in close contact with the outer surface of the connector injection tube portion 31 (the sealing tapered outer surface 34a of the connector lower region 34) when connected to the connector 30.
In this embodiment, as shown in Figures 1 and 2, the sealing tapered inner surface 24a is formed so that its upper end position coincides with the upper end position of the spout lower region 24 (i.e., the lower end position of the upper threaded region 23), and more specifically, the entire area of the spout lower region 24 is composed of the sealing tapered inner surface 24a.

なお、本実施形態では、スパウト下方側領域２４の内周面が、その全域に亘って密封用テーパ内周面２４ａから構成されているが、スパウト下方側領域２４の内周面の具体的態様はこれに限定されず、その上下方向の一部領域に、密封用テーパ内周面２４ａとして機能しない部分を有していてもよい。
また、本実施形態では、スパウト下方側領域２４の内周面が、その全域に亘って上方側に向かうに従って拡径するテーパ状に形成されているが、スパウト下方側領域２４の内周面の具体的態様はこれに限定されず、例えば、その上下方向の一部領域に、上下方向に平行な筒状（円筒状）の部分を有していてもよい。
また、密封用テーパ内周面２４ａの具体的態様については、上下方向に対する傾斜角度が同一の（傾斜角度が変わらない）テーパ部のみから構成されるものや、傾斜角度が異なる複数のテーパ部から構成されるものや、上下方向の位置によって傾斜角度が変化するもの等、如何なるものでもよい。 In this embodiment, the inner surface of the spout lower region 24 is composed of a sealing tapered inner surface 24a over its entire area, but the specific form of the inner surface of the spout lower region 24 is not limited to this, and some areas in the vertical direction may have a portion that does not function as a sealing tapered inner surface 24a.
In addition, in this embodiment, the inner surface of the spout lower region 24 is formed in a tapered shape that increases in diameter as it approaches the upward direction over its entire area, but the specific form of the inner surface of the spout lower region 24 is not limited to this, and for example, a portion of the inner surface in the vertical direction may have a tubular (cylindrical) portion that is parallel to the vertical direction.
Furthermore, the specific form of the sealing tapered inner surface 24a may be any form, such as one that is composed only of tapered sections having the same inclination angle in the vertical direction (the inclination angle does not change), one that is composed of multiple tapered sections having different inclination angles, or one in which the inclination angle changes depending on the vertical position.

また、突出部付き領域２５は、図１に示すように、内周側に向けて突出して形成された環状突出部２５ｂを有した領域であり、第３テーパ内周面２５ａを有している。
この第３テーパ内周面２５ａは、図１に示すように、スパウト下方側領域２４の内周面（本実施形態では、密封用テーパ内周面２４ａ）の下方側に隣接して、上方に向かうに従って拡径するようにテーパ状に形成されている。
第３テーパ内周面２５ａの上下方向に対する傾斜角度は、（第３テーパ内周面２５ａの上下方向のいずれの位置においても、）密封用テーパ内周面２４ａの上端部分の上下方向に対する傾斜角度よりも大きい。 As shown in FIG. 1, the protruding region 25 is a region having an annular protruding portion 25b formed to protrude toward the inner periphery, and has a third tapered inner periphery surface 25a.
As shown in FIG. 1, this third tapered inner surface 25a is adjacent to the lower side of the inner surface of the spout lower region 24 (in this embodiment, the sealing tapered inner surface 24a), and is formed in a tapered shape so that its diameter increases toward the top.
The inclination angle of the third tapered inner surface 25a in the vertical direction is greater than the inclination angle of the upper end portion of the sealing tapered inner surface 24a in the vertical direction (at any position in the vertical direction of the third tapered inner surface 25a).

なお、第３テーパ内周面２５ａの具体的態様については、上下方向に対する傾斜角度が同一の（傾斜角度が変わらない）テーパ部のみから構成されるものや、傾斜角度が異なる複数のテーパ部から構成されるものや、上下方向の位置によって傾斜角度が変化するもの等、如何なるものでもよい。 The specific form of the third tapered inner circumferential surface 25a may be any, such as one that is composed of only tapered sections with the same inclination angle in the vertical direction (the inclination angle does not change), one that is composed of multiple tapered sections with different inclination angles, or one in which the inclination angle changes depending on the vertical position.

また、スパウト筒状部２１の各部２２～２５の内周面は、その全域に亘って、上下方向に垂直な平面で切った場合の断面形状が、円形状に形成されている。 In addition, the inner circumferential surface of each of the sections 22 to 25 of the spout cylindrical section 21 is formed so that the cross-sectional shape when cut along a plane perpendicular to the up-down direction is circular throughout its entire area.

コネクタ３０は、合成樹脂等から形成され、患者の体内にその一端が挿入されるカテーテルの他端側に接続されるものであり、図３に示すように、スパウト２０に対してコネクタ３０を接続した状態でスパウト筒状部２１内に挿入される筒状のコネクタ注出筒部３１と、その中央にコネクタ注出筒部３１の注出流路３１ａに連通する貫通孔を有した天板部３６と、天板部３６の外周縁から下方側に向けて垂下する筒状のスカート部３７とを一体に備えている。
なお、スパウト２０に対してコネクタ３０を接続した状態では、図３に示すように、スパウト筒状部２１の上端面が天板部３６の下面に接触してもよく、スパウト筒状部２１の上端面が天板部３６の下面に接触しないようにしてもよい。 The connector 30 is made of a synthetic resin or the like, and is connected to one end of a catheter whose other end is inserted into the patient's body. As shown in Figure 3, the connector 30 is integrally provided with a cylindrical connector injection tube portion 31 which is inserted into the spout tubular portion 21 with the connector 30 connected to the spout 20, a top plate portion 36 having a through hole in its center which communicates with the injection flow path 31a of the connector injection tube portion 31, and a cylindrical skirt portion 37 which hangs down downward from the outer periphery of the top plate portion 36.
In addition, when the connector 30 is connected to the spout 20, as shown in Figure 3, the upper end surface of the spout cylindrical portion 21 may contact the lower surface of the top plate portion 36, or the upper end surface of the spout cylindrical portion 21 may not contact the lower surface of the top plate portion 36.

コネクタ注出筒部３１は、図３に示すように、スパウト２０に対してコネクタ３０を接続した状態で、上端側領域２２の内周側に挿入される天板側領域３２と、上方側ネジ付き領域２３の内周側に挿入されるコネクタ上方側領域３３と、スパウト下方側領域２４の内周側に挿入されるコネクタ下方側領域３４と、突出部付き領域２５の内周側に挿入されるコネクタ下端側領域３５とを有している。 As shown in FIG. 3, when the connector 30 is connected to the spout 20, the connector injection/dispensing tube portion 31 has a top plate side region 32 that is inserted into the inner circumference of the upper end side region 22, a connector upper side region 33 that is inserted into the inner circumference of the upper threaded region 23, a connector lower side region 34 that is inserted into the inner circumference of the spout lower side region 24, and a connector lower end side region 35 that is inserted into the inner circumference of the protrusion region 25.

本実施形態では、天板側領域３２、コネクタ上方側領域３３、コネクタ下方側領域３４、およびコネクタ下端側領域３５の外周面は、その全域に亘って、上方側に向かうに従って拡径するテーパ状に形成されている。
しかしながら、これらコネクタ注出筒部３１の各部３２～３５の外周面の具体的態様はこれに限定されず、例えば、その上下方向の少なくとも一部領域に、上下方向に平行な筒状（円筒状）の部分を有していてもよい。
また、コネクタ注出筒部３１の各部３２～３５の外周面を、上方側に向かうに従って拡径するテーパ状に形成する場合、コネクタ注出筒部３１の各部３２～３５の外周面の具体的態様については、上下方向に対する傾斜角度が同一の（傾斜角度が変わらない）テーパ部のみから構成されるものや、傾斜角度が異なる複数のテーパ部から構成されるものや、上下方向の位置によって傾斜角度が変化するもの等、如何なるものでもよい。
また、コネクタ注出筒部３１の各部３２～３５の内周面は、その全域に亘って、上下方向に垂直な平面で切った場合の断面形状が、円形状に形成されている。 In this embodiment, the outer circumferential surfaces of the top plate side region 32, the connector upper side region 33, the connector lower side region 34, and the connector lower end side region 35 are formed in a tapered shape that increases in diameter toward the upward direction over their entire areas.
However, the specific form of the outer peripheral surface of each of the parts 32 to 35 of the connector injection/discharge tube portion 31 is not limited to this, and for example, at least a portion of the vertical area may have a tubular (cylindrical) portion parallel to the vertical direction.
Furthermore, when the outer peripheral surface of each part 32 to 35 of the connector injection tube portion 31 is formed in a tapered shape that expands in diameter toward the upward side, the specific form of the outer peripheral surface of each part 32 to 35 of the connector injection tube portion 31 may be any form, such as one that is composed only of tapered parts having the same inclination angle in the vertical direction (the inclination angle does not change), one that is composed of multiple tapered parts with different inclination angles, or one that changes the inclination angle depending on the vertical position.
Further, the inner circumferential surface of each of the portions 32 to 35 of the connector injection/injection tube portion 31 is formed so that the cross section thereof when cut along a plane perpendicular to the up-down direction has a circular shape over the entire area.

また、スカート部３７は、図１や図３に示すように、コネクタ３０がスパウト２０に対して接続された状態でスパウトネジ部２３ｂに螺合可能なコネクタネジ部３７ａをその内周側に有している。 As shown in Figures 1 and 3, the skirt portion 37 has a connector thread portion 37a on its inner circumference that can be screwed into the spout thread portion 23b when the connector 30 is connected to the spout 20.

次に、スパウト２０に対してコネクタ３０を接続した状態における、スパウト筒状部２１の内周面およびコネクタ注出筒部３１の外周面の関係について、以下に説明する。 Next, the relationship between the inner circumferential surface of the spout tubular portion 21 and the outer circumferential surface of the connector pouring/discharging tubular portion 31 when the connector 30 is connected to the spout 20 will be described below.

まず、コネクタ下方側領域３４の密封用テーパ外周面３４ａの外径は、スパウト下方側領域２４の密封用テーパ内周面２４ａ（の挿入時における対応箇所）の内径よりも大きく設計されており、図３に示すように、スパウト２０に対してコネクタ３０を接続した状態では、密封用テーパ外周面３４ａが、密封用テーパ内周面２４ａとの間に第１締め代が生じるように、密封用テーパ内周面２４ａの内周側に挿入され、これにより、スパウト筒状部２１の内周面とコネクタ注出筒部３１の外周面との間が密封される。 First, the outer diameter of the sealing taper outer peripheral surface 34a of the connector lower region 34 is designed to be larger than the inner diameter of the sealing taper inner peripheral surface 24a (at the corresponding location during insertion) of the spout lower region 24. As shown in FIG. 3, when the connector 30 is connected to the spout 20, the sealing taper outer peripheral surface 34a is inserted into the inner peripheral side of the sealing taper inner peripheral surface 24a so that a first tightening gap is created between the sealing taper inner peripheral surface 24a, thereby sealing the gap between the inner peripheral surface of the spout tubular portion 21 and the outer peripheral surface of the connector injection/discharge tubular portion 31.

また、図３に示すように、スパウト２０に対してコネクタ３０を接続した状態では、コネクタ上方側領域３３は、（コネクタ上方側領域３３の上下方向のいずれの位置においても、）上方側ネジ付き領域２３との間に第１締め代よりも小さい締め代が生じるように（すなわち、上方側ネジ付き領域２３とコネクタ上方側領域３３との間の締め代のうち締め代が最も大きい部分の締め代が、上述した第１締め代のうち締め代が最も小さい部分の締め代よりも小さくなるように）、または、上方側ネジ付き領域２３との間に締め代を生じることなく上方側ネジ付き領域２３の内周面２３ａに接触するように、または、上方側ネジ付き領域２３との間に間隔が生じるように、上方側ネジ付き領域２３内に挿入されるように形成されている。 Also, as shown in FIG. 3, when the connector 30 is connected to the spout 20, the connector upper region 33 is formed so that (at any position in the vertical direction of the connector upper region 33) a tightening margin smaller than the first tightening margin is generated between the connector upper region 33 and the upper threaded region 23 (i.e., the tightening margin at the largest tightening margin between the upper threaded region 23 and the connector upper region 33 is smaller than the tightening margin at the smallest tightening margin of the first tightening margin described above), or so that the connector upper region 33 contacts the inner surface 23a of the upper threaded region 23 without generating a tightening margin between the connector upper region 33 and the upper threaded region 23, or so that the connector upper region 33 is inserted into the upper threaded region 23 so that a gap is generated between the connector upper region 33 and the upper threaded region 23.

また、同様に、図３に示すように、スパウト２０に対してコネクタ３０を接続した状態では、天板側領域３２は、（天板側領域３２の上下方向のいずれの位置においても、）上端側領域２２との間に第１締め代よりも小さい締め代が生じるように（すなわち、上端側領域２２と天板側領域３２との間の締め代のうち締め代が最も大きい部分の締め代が、上述した第１締め代のうち締め代が最も小さい部分の締め代よりも小さくなるように）、または、上端側領域２２との間に締め代を生じることなく上端側領域２２の内周面に接触するように、または、上端側領域２２との間に間隔が生じるように、上端側領域２２内に挿入されるように形成されている。 Similarly, as shown in FIG. 3, when the connector 30 is connected to the spout 20, the top plate side region 32 is formed so that (at any position in the vertical direction of the top plate side region 32) a tightening margin smaller than the first tightening margin is generated between the top plate side region 22 and the top plate side region 32 (i.e., the tightening margin at the largest tightening margin between the top plate side region 22 and the top plate side region 32 is smaller than the tightening margin at the smallest tightening margin of the first tightening margin described above), or so that the top plate side region 32 contacts the inner peripheral surface of the top plate side region 22 without generating a tightening margin between the top plate side region 22 and the top plate side region 32, or so that the top plate side region 32 is inserted into the top plate side region 22 so that a gap is generated between the top plate side region 22 and the top plate side region 22.

また、図３に示すように、スパウト２０に対してコネクタ３０を接続した状態では、コネクタ下端側領域３５は、その全域に亘って、突出部付き領域２５との間に間隔が生じるように、突出部付き領域２５内に挿入されるように形成されている。
なお、図３では、突出部付き領域２５とコネクタ下端側領域３５との間の間隔が僅かであるように描いたが、当該間隔はもっと大きいものであってもよく、突出部付き領域２５とコネクタ下端側領域３５が接触していてもよい。 As shown in FIG. 3, when the connector 30 is connected to the spout 20, the connector lower end region 35 is formed to be inserted into the protruding region 25 so that a gap is created between the connector lower end region 35 and the protruding region 25 over its entire area.
In addition, although FIG. 3 shows the gap between the protruding region 25 and the connector lower end region 35 as being small, the gap may be larger, and the protruding region 25 and the connector lower end region 35 may be in contact with each other.

キャップ４０は、合成樹脂等から形成され、コネクタ３０に接続されていない状態のスパウト２０に装着されるものであり、図５に示すように、天板部４１と、天板部４１の外周縁から下方側に向けて垂下する環状のスカート部４２と、スカート部４２の内周側において天板部４１の下面から下方側に向けて突出する環状のインナーリング部４３とを一体に備えている。 The cap 40 is made of synthetic resin or the like and is attached to the spout 20 when it is not connected to the connector 30. As shown in FIG. 5, the cap 40 is integrally made of a top plate portion 41, an annular skirt portion 42 that hangs downward from the outer periphery of the top plate portion 41, and an annular inner ring portion 43 that protrudes downward from the underside of the top plate portion 41 on the inner periphery of the skirt portion 42.

天板部４１は、図５に示すように、インナーリング部４３の外周側において、天板部４１の下面から下方側に向けて突出して形成された環状のコンタクトリング部４１ａを有している。 As shown in FIG. 5, the top plate portion 41 has an annular contact ring portion 41a formed on the outer periphery of the inner ring portion 43 and protruding downward from the underside of the top plate portion 41.

スカート部４２は、スパウト筒状部２１の外周側に配置される部位であり、図５に示すように、アウターリング部４２ａと、キャップ４０がスパウト２０に対して装着された状態でスパウトネジ部２３ｂに螺合するキャップネジ部４２ｂとをその内周側に有している。 The skirt portion 42 is a portion that is disposed on the outer peripheral side of the spout cylindrical portion 21, and as shown in FIG. 5, has an outer ring portion 42a and a cap thread portion 42b on its inner peripheral side that screws into the spout thread portion 23b when the cap 40 is attached to the spout 20.

キャップ４０は、図５に示すように、スパウト２０に対して装着された状態で、上端側領域２２の上端面に接触するコンタクトリング部４１ａと、上端側領域２２の外周面に接触するアウターリング部４２ａと、上端側領域２２の内周面２２ａに接触するインナーリング部４３とを有し、これにより、キャップ４０によってスパウト２０を密封し、スパウト２０が取り付けられた容器（図示しない）内の内容液が漏れ出すことを防止するように構成されている。 As shown in FIG. 5, when the cap 40 is attached to the spout 20, the cap 40 has a contact ring portion 41a that contacts the upper end surface of the upper end region 22, an outer ring portion 42a that contacts the outer peripheral surface of the upper end region 22, and an inner ring portion 43 that contacts the inner peripheral surface 22a of the upper end region 22. This allows the cap 40 to seal the spout 20 and prevent the contents of the container (not shown) to which the spout 20 is attached from leaking out.

このようにして得られた本実施形態の注出ユニット１０では、上方側ネジ付き領域２３の内周面が、その全域に亘って、密封用テーパ内周面２４ａを上方側に延長させた仮想テーパ面Ｔよりも外周側に位置していることにより、ヒケ（凹み）が形成されがちな上方側ネジ付き領域２３の内周面とコネクタ注出筒部３１（のコネクタ上方側領域３３）の外周面との間の接触に起因して、密封用テーパ外周面３４ａと密封用テーパ内周面２４ａとの間の嵌合（挿入）が阻害されてしまうことを回避できるため、密封用テーパ外周面３４ａと密封用テーパ内周面２４ａとの間の嵌合による、スパウト筒状部２１の内周面とコネクタ注出筒部３１の外周面との間の密封性を向上させることができる。
すなわち、その外周面にスパウトネジ部２３ｂが突出して形成された上方側ネジ付き領域２３の内周面には、スパウト２０の射出成形時における樹脂材料の収縮に起因してヒケが生じることがあり、このようなヒケが上方側ネジ付き領域２３の内周面に形成された場合、当該ヒケに起因してスパウト筒状部２１とコネクタ注出筒部３１との間の密封性が損なわれるという問題があった。
そこで、本実施形態の注出ユニット１０では、上方側ネジ付き領域２３の内周面を、その全域に亘って、密封用テーパ内周面２４ａを上方側に延長させた仮想テーパ面Ｔよりも外周側に位置させ、上方側ネジ付き領域２３の内周面とコネクタ注出筒部３１の外周面との間の締め代を小さくするまたは接触を避けることで、スパウト筒状部２１に対するコネクタ注出筒部３１の挿入性を向上させ、これにより、密封用テーパ外周面３４ａと密封用テーパ内周面２４ａとを確実に嵌合させて、スパウト筒状部２１の内周面とコネクタ注出筒部３１の外周面との間の密封性を向上させることができる。 In the dispensing unit 10 of this embodiment obtained in this manner, the inner surface of the upper threaded region 23 is located throughout its entire area outer than the virtual tapered surface T which is an upward extension of the sealing taper inner surface 24a. This prevents the engagement (insertion) between the sealing taper outer circumferential surface 34a and the sealing taper inner circumferential surface 24a from being hindered due to contact between the inner surface of the upper threaded region 23, which is prone to forming sink marks (dents), and the outer circumferential surface of the connector dispensing tube portion 31 (the connector upper region 33). This improves the sealing performance between the inner surface of the spout tubular portion 21 and the outer circumferential surface of the connector dispensing tube portion 31 due to the engagement between the sealing taper outer circumferential surface 34a and the sealing taper inner circumferential surface 24a.
In other words, sink marks may occur on the inner surface of the upper threaded region 23, which has the spout threaded portion 23b protruding from its outer peripheral surface, due to shrinkage of the resin material during injection molding of the spout 20.If such sink marks are formed on the inner surface of the upper threaded region 23, there is a problem that the seal between the spout tubular portion 21 and the connector pouring tubular portion 31 is impaired due to the sink marks.
Therefore, in the dispensing unit 10 of this embodiment, the inner surface of the upper threaded region 23 is positioned throughout its entire area outer than a virtual tapered surface T formed by extending the sealing taper inner surface 24a upward, and the tightening margin between the inner surface of the upper threaded region 23 and the outer surface of the connector dispensing tube portion 31 is reduced or contact is avoided, thereby improving the insertability of the connector dispensing tube portion 31 into the spout tubular portion 21. This allows the sealing taper outer surface 34a and the sealing taper inner surface 24a to be securely fitted together, improving the seal between the inner surface of the spout tubular portion 21 and the outer surface of the connector dispensing tube portion 31.

また、密封用テーパ内周面２４ａを、その上端位置がスパウト下方側領域２４の上端位置（すなわち、上方側ネジ付き領域２３の下端位置）に一致するように形成することにより、密封用テーパ内周面２４ａの上下方向幅を広く確保することが可能であるため、スパウト筒状部２１の内周面とコネクタ注出筒部３１の外周面との間の密封性を向上させることができる。 In addition, by forming the sealing tapered inner surface 24a so that its upper end position coincides with the upper end position of the spout lower region 24 (i.e., the lower end position of the upper threaded region 23), it is possible to ensure a wide vertical width of the sealing tapered inner surface 24a, thereby improving the seal between the inner surface of the spout tubular portion 21 and the outer surface of the connector injection/injection tubular portion 31.

また、本実施形態の注出ユニット１０では、スパウト筒状部２１の内周面のうち、キャップ４０との接続時にキャップ４０との間の密封を確保する部位として、上端側領域２２の内周面２２ａを利用し、また、コネクタ３０との接続時にコネクタ３０との間の密封を確保する部位として、（少なくとも主に）密封用テーパ内周面２４ａを利用している。
このように、スパウト筒状部２１の内周面のうち、キャップ４０との間の密封を確保する部位（内周面２２ａ）と、コネクタ３０との間の密封を確保する部位（密封用テーパ内周面２４ａ）とを異ならせることにより、相互間で影響を与えることを回避できる。 In addition, in the spout cylindrical portion 21 of the spout in the pouring unit 10 of this embodiment, the inner peripheral surface 22a of the upper end region 22 is used as the portion of the inner peripheral surface of the spout cylindrical portion 21 that ensures a tight seal with the cap 40 when connected to the cap 40, and the sealing tapered inner peripheral surface 24a is used (at least mainly) as the portion of the inner peripheral surface of the spout cylindrical portion 21 that ensures a tight seal with the connector 30 when connected to the connector 30.
In this way, by making the portion of the inner surface of the spout cylindrical portion 21 that ensures sealing with the cap 40 (inner surface 22a) different from the portion that ensures sealing with the connector 30 (sealing tapered inner surface 24a), it is possible to avoid any influence between them.

以上、本発明の実施形態を詳述したが、本発明は上記実施形態に限定されるものではなく、特許請求の範囲に記載された本発明を逸脱することなく種々の設計変更を行なうことが可能である。 Although the embodiments of the present invention have been described above in detail, the present invention is not limited to the above embodiments, and various design changes can be made without departing from the invention described in the claims.

例えば、上述した実施形態では、注出ユニット１０およびコネクタ３０が経腸栄養の用途で用いられるものとして説明したが、注出ユニット１０およびコネクタ３０を、経腸栄養以外の用途で用いても何ら構わない。 For example, in the above embodiment, the dispensing unit 10 and the connector 30 are described as being used for enteral nutrition, but the dispensing unit 10 and the connector 30 may also be used for purposes other than enteral nutrition.

また、上述した実施形態では、キャップ４０がスパウト２０に対して装着され、上端側領域２２の上端面に接触するコンタクトリング部４１ａと、上端側領域２２の外周面に接触するアウターリング部４２ａと、上端側領域２２の内周面２２ａに接触するインナーリング部４３とを有し、これにより、キャップ４０によってスパウト２０を密封するものとして説明したが、キャップ４０の形態はこれに限らない。さらにキャップ４０の代わりにアルミシールによってスパウト筒状部２１の開口を塞ぐものや、当該アルミシールとキャップ４０とを併用したものなどその他の密封形態を用いても何ら構わない。 In the above embodiment, the cap 40 is attached to the spout 20 and has a contact ring portion 41a that contacts the upper end surface of the upper end region 22, an outer ring portion 42a that contacts the outer peripheral surface of the upper end region 22, and an inner ring portion 43 that contacts the inner peripheral surface 22a of the upper end region 22, thereby sealing the spout 20, but the form of the cap 40 is not limited to this. Furthermore, it is also possible to use other sealing forms, such as an aluminum seal that closes the opening of the spout cylindrical portion 21 instead of the cap 40, or a combination of the aluminum seal and the cap 40.

１０・・・注出ユニット
２０・・・スパウト
２１・・・スパウト筒状部
２１ａ・・・注出流路
２２・・・上端側領域
２２ａ・・・内周面
２３・・・上方側ネジ付き領域
２３ａ・・・上方側テーパ内周面
２３ｂ・・・スパウトネジ部
２４・・・スパウト下方側領域
２４ａ・・・密封用テーパ内周面
２５・・・突出部付き領域
２５ａ・・・第３テーパ内周面
２５ｂ・・・環状突出部
２６・・・容器用取付部
３０・・・コネクタ
３１・・・コネクタ注出筒部
３１ａ・・・注出流路
３２・・・天板側領域
３３・・・コネクタ上方側領域
３４・・・コネクタ下方側領域
３４ａ・・・密封用テーパ外周面
３５・・・コネクタ下端側領域
３６・・・天板部
３７・・・スカート部
３７ａ・・・コネクタネジ部
４０・・・キャップ
４１・・・天板部
４１ａ・・・コンタクトリング部
４２・・・スカート部
４２ａ・・・アウターリング部
４２ｂ・・・キャップネジ部
４３・・・インナーリング部
Ｔ・・・仮想テーパ面 LIST OF SYMBOLS 10 Spout unit 20 Spout 21 Spout tubular portion 21a Spout flow path 22 Upper end region 22a Inner circumferential surface 23 Upper threaded region 23a Upper tapered inner circumferential surface 23b Spout thread portion 24 Spout lower region 24a Sealing tapered inner circumferential surface 25 Projected region 25a Third tapered inner circumferential surface 25b Annular projection 26 Container attachment portion 30 Connector 31 Connector injection/discharge tubular portion 31a Spout flow path 32 Top plate region 33 Connector upper region 34 Connector lower region 34a Sealing tapered outer circumferential surface 35 Connector lower end region 36: Top plate portion 37: Skirt portion 37a: Connector screw portion 40: Cap 41: Top plate portion 41a: Contact ring portion 42: Skirt portion 42a: Outer ring portion 42b: Cap screw portion 43: Inner ring portion T: Virtual tapered surface

Claims

A spout connected to a connector in a state in which a connector pouring/discharging tube portion is inserted into a spout tube portion,
The spout cylindrical portion has an upper threaded region having a spout thread portion formed on its outer circumferential surface, and a spout lower region formed adjacent to the lower side of the upper threaded region,
The spout lower region has a sealing tapered inner peripheral surface that is formed to increase in diameter as it extends upward and can be in close contact with the outer peripheral surface of the connector injection/discharge cylindrical portion,
A spout characterized in that the entire inner surface of the upper threaded region is located outer than an imaginary tapered surface that extends upward from the sealing tapered inner surface.

The spout according to claim 1, characterized in that the sealing tapered inner peripheral surface is formed so that its upper end position coincides with the upper end position of the spout lower region.

The upper threaded region has an upper tapered inner circumferential surface that is formed so as to increase in diameter upward,
2. The spout according to claim 1, wherein an inclination angle of the upper tapered inner peripheral surface relative to the vertical direction is greater than an inclination angle of an upper end portion of the sealing tapered inner peripheral surface relative to the vertical direction.

The spout according to claim 1, characterized in that the inner circumferential surfaces of the upper threaded region and the lower spout region are tapered in diameter over their entire area in an upward direction.

The spout cylindrical portion has a third tapered inner circumferential surface formed adjacent to the lower side of the inner circumferential surface of the spout lower region,
The third tapered inner circumferential surface is formed so as to increase in diameter upward,
2. The spout according to claim 1, wherein an inclination angle of the third tapered inner peripheral surface relative to the vertical direction is greater than an inclination angle of an upper end portion of the sealing tapered inner peripheral surface relative to the vertical direction.

A spout unit comprising the spout according to claim 1 and the connector.

the connector pouring tube portion has a connector upper region that is inserted into the inner periphery of the upper threaded region and a connector lower region that is inserted into the inner periphery of the spout lower region when the connector is connected to the spout,
the connector lower region has a sealing taper outer peripheral surface that is inserted into the inner peripheral side of the sealing taper inner peripheral surface so that a first interference is generated between the sealing taper inner peripheral surface and the sealing taper outer peripheral surface when the connector is connected to the spout,
The spout unit according to claim 6, characterized in that, when the connector is connected to the spout, the upper region of the connector is inserted into the upper threaded region so that a tightening margin smaller than the first tightening margin is created between the upper region and the upper threaded region, or so that the upper region of the connector contacts the inner surface of the upper threaded region without any tightening margin between the upper region and the upper threaded region, or so that a gap is created between the upper region and the upper threaded region.

The spout unit according to claim 7, characterized in that the outer peripheral surface of the lower region of the connector is tapered over its entire area, increasing in diameter as it moves upward.

The spout unit according to claim 6, characterized in that the connector has a connector thread portion that can be screwed into the spout thread portion.

The dispensing unit further includes a cap that can be attached to the spout,
The spout tubular portion has an upper end region above the upper threaded region,
The spouting unit according to claim 6, characterized in that the cap, when attached to the spout, has an outer ring portion that contacts the outer peripheral surface of the upper end region, an inner ring portion that contacts the inner peripheral surface of the upper end region, and a contact ring portion that contacts the upper end surface of the upper end region.

A spout and a connector, the connector being connected to the spout in a state where a connector spout pipe portion is inserted into a spout pipe portion,
The spout cylindrical portion has an upper threaded region having a spout thread portion formed on its outer circumferential surface, and a spout lower region formed adjacent to the lower side of the upper threaded region,
The spout lower region has a tapered inner peripheral surface that is formed to increase in diameter as it extends upward and is capable of being in close contact with an outer peripheral surface of the connector injection/discharge tube portion,
the connector pouring/discharging tube portion has a connector upper region that is disposed on the inner circumferential side of the upper threaded region and a connector lower region that is disposed on the inner circumferential side of the spout lower region when the connector is connected to the spout,
the connector lower region has a sealing taper outer peripheral surface that is inserted into the inner peripheral side of the sealing taper inner peripheral surface so that a first interference is generated between the sealing taper inner peripheral surface and the sealing taper outer peripheral surface when the connector is connected to the spout,
A spouting unit characterized in that, when the connector is connected to the spout, the upper region of the connector is inserted into the upper threaded region so that a tightening margin smaller than the first tightening margin is created between the upper region and the upper threaded region, or so that the upper region contacts the inner surface of the upper threaded region without any tightening margin between the upper region and the upper threaded region, or so that a gap is created between the upper region and the upper threaded region.