Spout and Dispensing Unit

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

[Technical Field]

[0001] The present invention relates to a spout and a dispensing unit.

[0002] In the field of enteral nutrition, RTH (Ready To Hang) preparations have traditionally been widely used, in which a liquid content containing a nutrient to be administered to a patient is filled in a container (bag) such as a pouch. With 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 the other end of a catheter to be inserted into the patient's body, and the liquid content containing the nutrient content is administered to the patient.

[0003] In recent years, in relation to such spouts and connectors, in accordance with the international standard ISO80369-3 for nutritional medical devices, a connector connection configuration has begun to be adopted in which a connector injection tube portion (male connector portion) formed on the connector is inserted into a spout tube portion (female connector portion) formed on the spout (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2020-033084 Summary of the Invention [Problem to be solved by the invention]

[0005] However, as the applicant continued to develop a dispensing unit including such a spout and connector, it became clear that there was room for improvement in the sealing between the inner surface of the spout cylindrical portion and the outer surface of the connector dispensing cylindrical portion.

[0006] Therefore, the present invention aims to solve these problems and provide a spout and spout unit with a simple configuration that improves the sealing between the inner surface of the spout cylindrical portion and the outer surface of the connector spout cylindrical portion. [Means for solving the problem]

[0007] The spout of the present invention is a spout that is connected to a connector with a connector injection tube inserted into the spout tubular portion, and the spout tubular portion has an upper threaded region with a spout thread 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 so that its diameter increases as it extends upward and can be in close contact with the outer surface of the connector injection tube, and the inner surface of the upper threaded region is located entirely outside a virtual tapered surface that extends the sealing tapered inner surface upward, 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 pouring unit of the present invention is a pouring unit that includes a spout and a connector, and in which the connector is connected to the spout with the connector pouring tubular portion inserted into the spout tubular portion, the spout tubular portion having an upper threaded region with 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 having a tapered inner circumferential surface that is formed so as to increase in diameter as it extends upward and can be in close contact with the outer circumferential surface of the connector pouring tubular portion, and the connector pouring tubular portion has a connector upper region that is arranged on the inner circumferential side of the upper threaded region and a tapered inner circumferential surface of the spout lower region when the connector is connected to the spout. The connector has a connector lower region arranged on the inner periphery, and the connector lower region has a sealing tapered outer periphery that is inserted into the inner periphery of the sealing tapered inner periphery so that a first interference is created between the connector and the sealing tapered inner periphery when the connector is connected to the spout, and the connector upper region is inserted into the upper threaded region so that, when the connector is connected to the spout, an interference smaller than the first interference is created between the connector and the upper threaded region, or so that the connector upper region comes into contact with the inner periphery of the upper threaded region without creating an interference between the connector and the upper threaded region, or so that a gap is created between the connector and the upper threaded region, thereby solving the problem. In any of the spouts or dispensing units described above, the sealing tapered inner peripheral surface may be formed so that its upper end position coincides with the upper end position of the spout lower region. In any of the spouts or dispensing units described above, the upper threaded region has an upper tapered inner surface formed so as to increase in diameter as it extends upward, and the angle of inclination of the upper tapered inner surface relative to the vertical direction may be greater than the angle of inclination of the upper end portion of the sealing tapered inner surface relative to the vertical direction. In any of the spouts or dispensing units described above, the inner surfaces of the upper threaded region and the lower spout region may be tapered throughout their entire area, increasing in diameter as they extend upward. In any of the spouts or dispensing units described above, 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 angle of inclination of the third tapered inner surface relative to the vertical direction may be greater than the angle of inclination of the upper end portion of the sealing tapered inner surface relative to the vertical direction. In any of the spouts or dispensing units described above, the connector dispensing tube portion has a connector upper region that is inserted into the inner periphery of the upper threaded region when the connector is connected to the spout, and a connector lower region that is inserted into the inner periphery of the spout lower region, and the connector lower region has a sealing tapered outer surface that is inserted into the inner periphery of the sealing tapered inner surface so that a first interference is created between the connector and the sealing tapered inner periphery when the connector is connected to the spout, and the connector upper region may be inserted into the upper threaded region so that, when the connector is connected to the spout, an interference smaller than the first interference is created between the connector and the upper threaded region, or so that the connector upper region contacts the inner periphery of the upper threaded region without creating an interference between the connector and the upper threaded region, or so that a gap is created between the connector and the upper threaded region. In any of the spouts or dispensing units described above, the outer peripheral surface of the connector lower region may be formed in a tapered shape that increases in diameter upward over the entire area. In any of the spouts or dispensing units described above, the connector may have a connector thread portion that can be threaded onto 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. [Effects of the Invention]

[0008] According to the present invention, it is possible to improve the sealing performance between the inner peripheral surface of the spout cylindrical portion and the outer peripheral surface of the connector pouring cylindrical portion with a simple configuration. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 2 is an explanatory diagram showing a spout according to one embodiment of the present invention. [Figure 2] FIG. 4 is an explanatory diagram illustrating the state of the inner circumferential surface of the spout cylindrical portion. [Figure 3] FIG. 10 is an explanatory diagram showing the state in which the connector is connected to the spout. [Figure 4] FIG. 10 is an explanatory diagram showing a spout and a connector. [Figure 5] FIG. 10 is an explanatory diagram showing the state in which the cap is attached to the spout. DETAILED DESCRIPTION OF THE INVENTION

[0010] A dispensing unit 10 according to one embodiment of the present invention will be described below with reference to the drawings.

[0011] 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 nutrient 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.

[0012] The specific configuration of each component will be described below with reference to the drawings.

[0013] First, the spout 20 is formed as an injection-molded product made of synthetic resin or the like, and as shown in Figure 1, is integrally provided with a cylindrical spout tubular portion 21 having an internal dispensing flow path 21a extending in the vertical direction for dispensing the content liquid, and a container mounting portion 26 that is attached to the container by thermal welding, and as shown in Figure 3, the spout tubular portion 21 is connected to the connector 30 with a connector dispensing tubular portion 31 inserted into it.

[0014] The spout cylindrical portion 21 is formed to protrude upward from the container mounting portion 26, and as shown in Figure 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 thread portion 23b protruding from its outer peripheral surface, a spout lower region 24 formed adjacent to the lower side of the upper threaded region 23 and having a sealing tapered inner peripheral surface 24a that can be in close contact with the outer peripheral surface of the connector pouring / discharging cylindrical 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.

[0015] The state of the inner circumferential surface of each of the portions 22 to 25 of the spout cylindrical portion 21 will be described below.

[0016] 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 Figure 2, in order to make it easier to understand the invention, the inclination angles of the inner surfaces of the upper end region 22 and the upper threaded region 23 are exaggerated (the inclination angle relative to the vertical direction is larger than in other figures).

[0017] In this embodiment, the inner circumferential surface 22a of the upper end region 22 is tapered over its entire area so that the diameter increases as it extends upward, as shown in Figures 1 and 2. However, the specific form of the inner circumferential surface 22a of the upper end region 22 is not limited to a tapered shape, and for example, at least a portion of the inner circumferential surface 22a in the vertical direction may have a tubular (cylindrical) portion that is parallel to the vertical direction.

[0018] 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 as it extends upward, 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 peripheral surface 23a relative to the vertical direction is greater than the inclination angle of the upper end portion of the sealing tapered inner peripheral surface 24a relative to the vertical direction (at any position in the vertical direction of the upper tapered inner peripheral surface 23a). As shown in Figure 2, the inner surface of the upper threaded region 23 formed in this manner is located throughout its entire area on the outer side 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).

[0019] 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 as it goes upward over its entire area, but 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. Furthermore, in this embodiment, the upper tapered inner surface 23a is formed only from tapered portions that have the same inclination angle relative to the vertical direction (the inclination angle does not change) throughout its entire area, 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 form, such as one composed of multiple tapered portions with different inclination angles, or one in which the inclination angle changes depending on the vertical position.

[0020] In addition, as shown in Figures 1 and 2, the spout lower region 24 is tapered so that its diameter increases as it extends upward, and has a sealing tapered inner surface 24a that can be tightly fitted to the outer surface of the connector injection / dispensing 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 spout lower region 24 is composed of the sealing tapered inner surface 24a.

[0021] 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 it may have a portion in some vertical areas that does not function as a sealing tapered inner surface 24a. Furthermore, in this embodiment, the inner circumferential surface of the spout lower region 24 is formed in a tapered shape that widens in diameter as it moves upward throughout its entire area, but the specific form of the inner circumferential surface of the spout lower region 24 is not limited to this, and for example, a portion of its vertical area may have a cylindrical (cylindrical) portion that is parallel to the vertical direction. Furthermore, the specific form of the sealing tapered inner surface 24a may be any, such as one consisting of only tapered sections with the same inclination angle in the vertical direction (the inclination angle does not change), one consisting of multiple tapered sections with different inclination angles, or one in which the inclination angle changes depending on the vertical position.

[0022] 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 Figure 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 tapered so that its diameter increases as it extends upward. The inclination angle of the third tapered inner peripheral surface 25a relative to the vertical direction is greater than the inclination angle of the upper end portion of the sealing tapered inner peripheral surface 24a relative to the vertical direction (at any position in the vertical direction of the third tapered inner peripheral surface 25a).

[0023] The specific form of the third tapered inner surface 25a may be any, such as one consisting of only tapered sections with the same inclination angle relative to the vertical direction (the inclination angle does not change), one consisting of multiple tapered sections with different inclination angles, or one in which the inclination angle changes depending on the vertical position.

[0024] The inner circumferential surface of each of the portions 22 to 25 of the spout cylindrical portion 21 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.

[0025] The connector 30 is made of a synthetic resin or the like, and is connected to the other end of a catheter whose one end is inserted into the patient's body. As shown in Figure 3, the connector 30 is integrally provided with a cylindrical connector outlet tube 31 that 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 that communicates with the outlet flow path 31a of the connector outlet tube portion 31, and a cylindrical skirt portion 37 that hangs downward from the outer periphery of the top plate portion 36. When the connector 30 is connected to the spout 20, the upper end surface of the spout cylindrical portion 21 may contact the lower surface of the top plate portion 36, as shown in Figure 3, or the upper end surface of the spout cylindrical portion 21 may not contact the lower surface of the top plate portion 36.

[0026] As shown in Figure 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 side of the upper end side region 22, a connector upper side region 33 that is inserted into the inner side of the upper side threaded region 23, a connector lower side region 34 that is inserted into the inner side of the spout lower side region 24, and a connector lower end side region 35 that is inserted into the inner side of the protrusion region 25.

[0027] In this embodiment, the outer 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 widens in diameter as it extends upward throughout their entire areas. However, the specific form of the outer surface of each part 32 to 35 of these connector injection / discharge tubular parts 31 is not limited to this, and for example, at least a portion of the vertical area may have a tubular (cylindrical) part that is 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 widens in diameter as it goes upward, the specific form of the outer peripheral surface of each part 32 to 35 of the connector injection tube portion 31 may be any, such as one consisting only of tapered parts with the same inclination angle in the vertical direction (the inclination angle does not change), one consisting of multiple tapered parts with different inclination angles, or one whose inclination angle changes depending on the vertical position. Moreover, the inner circumferential surface of each of the portions 32 to 35 of the connector injection / discharge cylindrical 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.

[0028] 1 and 3, the skirt portion 37 has, on its inner periphery, a connector thread portion 37a that can be threaded onto the spout thread portion 23b when the connector 30 is connected to the spout 20.

[0029] Next, the relationship between the inner peripheral surface of spout cylindrical portion 21 and the outer peripheral surface of connector pouring / discharging cylindrical portion 31 when connector 30 is connected to spout 20 will be described below.

[0030] First, the outer diameter of the sealing tapered outer surface 34a of the connector lower region 34 is designed to be larger than the inner diameter of the sealing tapered inner surface 24a (of the corresponding portion at the time of insertion) of the spout lower region 24, and as shown in Figure 3, when the connector 30 is connected to the spout 20, the sealing tapered outer surface 34a is inserted into the inner side of the sealing tapered inner surface 24a so that a first interference is created between the sealing tapered inner surface 24a, thereby sealing the space between the inner surface of the spout tubular portion 21 and the outer surface of the connector pouring / discharging tubular portion 31.

[0031] 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 smaller interference is created between it and the upper threaded region 23 than the first interference (i.e., the largest interference between the upper threaded region 23 and the connector upper region 33 is smaller than the smallest interference between the first interference described above), or so that it contacts the inner surface 23a of the upper threaded region 23 without creating an interference between it and the upper threaded region 23, or so that it is inserted into the upper threaded region 23 so that a gap is created between it and the upper threaded region 23.

[0032] 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 clamping margin smaller than the first clamping margin is created between it and the upper end side region 22 (i.e., the clamping margin at the largest part of the clamping margin between the upper end side region 22 and the top plate side region 32 is smaller than the clamping margin at the smallest part of the first clamping margin described above), or so that it contacts the inner surface of the upper end side region 22 without creating a clamping margin between it and the upper end side region 22, or so that it is inserted into the upper end side region 22 so that a gap is created between it and the upper end side region 22.

[0033] Also, as shown in Figure 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 Figure 3, the gap between the protruding region 25 and the connector lower end region 35 is depicted as being small, but the gap may be larger, and the protruding region 25 and the connector lower end region 35 may be in contact with each other.

[0034] The cap 40 is formed from a synthetic resin or the like and is attached to the spout 20 when it is not connected to the connector 30. As shown in Figure 5, the cap 40 integrally comprises a top plate portion 41, an annular skirt portion 42 that hangs downward from the outer peripheral edge 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 peripheral side of the skirt portion 42.

[0035] As shown in FIG. 5, the top plate portion 41 has an annular contact ring portion 41a formed on the outer circumferential side of the inner ring portion 43 so as to protrude downward from the lower surface of the top plate portion 41.

[0036] The skirt portion 42 is a portion that is positioned on the outer periphery of the spout cylindrical portion 21, and as shown in Figure 5, has an outer ring portion 42a and a cap screw portion 42b on its inner periphery that screws into the spout screw portion 23b when the cap 40 is attached to the spout 20.

[0037] As shown in Figure 5, when cap 40 is attached to spout 20, it has a contact ring portion 41a that contacts the upper end surface of upper end region 22, an outer ring portion 42a that contacts the outer peripheral surface of upper end region 22, and an inner ring portion 43 that contacts the inner peripheral surface 22a of upper end region 22, thereby sealing spout 20 with cap 40 and preventing the contents of a container (not shown) to which spout 20 is attached from leaking.

[0038] 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 imaginary tapered surface T which is an upward extension of the sealing tapered inner surface 24a. This prevents the engagement (insertion) between the sealing tapered outer surface 34a and the sealing tapered inner 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 surface of the connector dispensing tube portion 31 (of the connector upper region 33). This improves the sealing performance between the inner surface of the spout tube portion 21 and the outer surface of the connector dispensing tube portion 31 due to the engagement between the sealing tapered outer surface 34a and the sealing tapered inner surface 24a. That is, on the inner surface of the upper threaded region 23, on whose outer surface the spout threaded portion 23b is formed protruding, sink marks may occur due to shrinkage of the resin material during injection molding of the spout 20, and if such sink marks are formed on the inner surface of the upper threaded region 23, there is a problem in that the sealing between the spout tubular portion 21 and the connector injection 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 the imaginary tapered surface T formed by extending the sealing tapered inner surface 24a upward, and by reducing the interference or avoiding contact between the inner surface of the upper threaded region 23 and the outer surface of the connector dispensing tube portion 31, the insertability of the connector dispensing tube portion 31 into the spout tubular portion 21 is improved.This allows the sealing tapered outer surface 34a and the sealing tapered inner surface 24a to be securely fitted together, improving the sealing between the inner surface of the spout tubular portion 21 and the outer surface of the connector dispensing tube portion 31.

[0039] Furthermore, 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 sealing performance between the inner surface of the spout tubular portion 21 and the outer surface of the connector injection / discharge tubular portion 31.

[0040] In addition, in the dispensing unit 10 of this embodiment, the inner surface 22a of the upper end region 22 of the inner surface of the spout cylindrical portion 21 is used as the portion that ensures a tight seal between the cap 40 and the spout cylindrical portion 21 when connected to the cap 40, and the sealing tapered inner surface 24a is used (at least mainly) as the portion that ensures a tight seal between the spout cylindrical portion 21 and the connector 30 when connected to the connector 30. In this way, by differentiating the portion of the inner surface of the spout cylindrical portion 21 that ensures sealing with the cap 40 (inner surface 22a) from the portion that ensures sealing with the connector 30 (sealing tapered inner surface 24a), it is possible to avoid mutual influence.

[0041] Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above embodiments, and various design modifications can be made without departing from the present invention as set forth in the claims.

[0042] For example, in the above-described embodiment, the spout unit 10 and the connector 30 are described as being used for enteral nutrition, but the spout unit 10 and the connector 30 may also be used for purposes other than enteral nutrition.

[0043] Furthermore, in the above-described 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. [Explanation of symbols]

[0044] 10. Dispensing unit 20 ··· Spout 21 Spout cylindrical portion 21a ··· Pour channel 22... Upper end area 22a...Inner peripheral surface 23 Upper threaded area 23a: Upper tapered inner surface 23b Spout thread 24 Lower spout area 24a Sealing tapered inner surface 25 ··· Area with protrusions 25a Third tapered inner surface 25b... Annular protrusion 26 Container mounting part 30 ··· Connector 31 Connector injection tube part 31a ··· Pour flow path 32 Top panel area 33 Connector upper side area 34 Lower connector area 34a: Sealing tapered outer surface 35 Lower end area of ​​connector 36 Top plate 37 ··· Skirt part 37a Connector thread 40 ··· Cap 41 Top plate 41a: Contact ring part 42 ··· Skirt part 42a Outer ring part 42b Cap screw part 43 Inner ring part T: Virtual tapered surface

Claims

1. A spout connected to a connector in a state in which a connector pouring cylindrical portion is inserted into a spout cylindrical portion, The spout cylindrical portion has 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 has a tapered inner peripheral surface for sealing 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 pouring 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 the sealing tapered inner surface upward.

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

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

4. 2. The spout according to claim 1, wherein the inner circumferential surfaces of the upper threaded region and the lower spout region are tapered over their entire areas, increasing in diameter as they extend upward.

5. 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 angle of inclination of the third tapered inner peripheral surface relative to the vertical direction is greater than an angle of inclination of an upper end portion of the sealing tapered inner peripheral surface relative to the vertical direction.

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

7. the connector pouring tube portion has a connector upper region that is inserted into the inner circumferential side of the upper threaded region when the connector is connected to the spout, and a connector lower region that is inserted into the inner circumferential side of the spout lower region, the connector lower region has a sealing tapered outer peripheral surface that is inserted into the inner peripheral side of the sealing tapered inner peripheral surface so as to generate a first interference between the sealing tapered inner peripheral surface and the sealing tapered 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 connector upper region is inserted into the upper threaded region so that an interference smaller than the first interference is created between the connector upper region and the upper threaded region, or so that the connector upper region contacts the inner surface of the upper threaded region without an interference between the connector upper region and the upper threaded region, or so that a gap is created between the connector upper region and the upper threaded region.

8. The spout unit according to claim 7, wherein the outer peripheral surface of the lower region of the connector is formed in a tapered shape that increases in diameter upward over the entire area.

9. The spout unit according to claim 6, wherein the connector has a connector thread portion that can be threaded onto the spout thread portion.

10. The dispensing unit further includes a cap that can be attached to the spout, The spout cylindrical portion has an upper end region above the upper threaded region, The dispensing unit described in claim 6, characterized in that the cap has an outer ring portion that contacts the outer peripheral surface of the upper end region when attached to the spout, 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.

11. A spout and a connector are provided, and the connector is connected to the spout in a state where the connector spout cylindrical portion is inserted into the spout cylindrical portion. The spout cylindrical portion has 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 has a tapered inner peripheral surface for sealing 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 pouring cylindrical portion, the connector pouring tube portion has a connector upper region that is arranged on the inner circumferential side of the upper threaded region and a connector lower region that is arranged 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 tapered outer peripheral surface that is inserted into the inner peripheral side of the sealing tapered inner peripheral surface so as to generate a first interference between the sealing tapered inner peripheral surface and the sealing tapered 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 connector and the upper threaded region, or so that a gap is created between the connector and the upper threaded region.

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