Spout and injection 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] Conventionally, in enteral nutrition, RTH (Ready To Hang) preparations, in which the liquid contents including the nutritional agent to be administered to the patient are 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 contents, the spout is opened just before the liquid contents are administered to the patient, and a connector, one end of which is connected to the other end of a catheter to be inserted into the patient's body, is connected to the opened spout, thereby administering the liquid contents including the nutritional agent 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 / dispensing tubular portion (male connector portion) formed on the connector is inserted into a spout tubular portion (female connector portion) formed on the spout (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2020-033084 A Summary of the Invention [Problem to be solved by the invention]

[0005] 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 surface of the spout cylindrical portion and the outer surface of the connector pouring cylindrical portion.

[0006] Therefore, the present invention is intended to solve these problems and aims to provide a spout and spout unit that has a simple configuration and improves the sealing performance between the inner surface of the spout tubular portion and the outer surface of the connector spout tubular 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 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 increase 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 outside 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 peripheral surface so that a first interference is generated 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 interference smaller than the first interference is generated between the upper threaded 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 an interference with the upper threaded region, or so that a gap is generated 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 a connector upper region that is inserted into the inner peripheral side of the upper threaded region and a connector lower region that is inserted into the inner peripheral side of the spout lower region when the connector is connected to the spout, and 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 tightening margin is generated between the connector and the sealing taper inner peripheral surface 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, a tightening margin smaller than the first tightening margin is generated between the connector upper region and the upper threaded region, or so that the connector upper region contacts the inner peripheral surface of the upper threaded region without generating a tightening margin between the connector upper region and the upper threaded region, or so that a gap is generated between the connector upper region and the upper threaded region. 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 pouring 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. Effect 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 injection / discharge cylindrical portion with a simple configuration. [Brief description of the drawings]

[0009] [Figure 1] FIG. 2 is an explanatory diagram showing a spout according to one embodiment of the present invention. [Diagram 2] FIG. 4 is an explanatory diagram illustrating the state of the inner circumferential surface of the spout cylindrical portion. [Diagram 3] FIG. 13 is an explanatory diagram showing the state in which the connector is connected to the spout. [Figure 4] FIG. [Diagram 5] FIG. 4 is an explanatory diagram showing the state in which the cap is attached to the spout. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, a dispensing unit 10 according to one embodiment of the present invention will be described 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 nutritional agent for enteral nutrition, a connector 30 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, 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 inner pouring flow path 21a extending in the vertical direction for pouring out the content liquid, and a container attachment portion 26 which is attached to a container by thermal welding, and as shown in FIG. 3, is connected to connector 30 with a connector pouring tubular portion 31 inserted into spout tubular portion 21.

[0014] The spout tubular portion 21 is formed protruding 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 threaded 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 injection / discharge 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.

[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 in 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 as to increase in diameter toward the top, 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 may, for example, have a tubular (cylindrical) portion parallel to the vertical direction in at least a portion of the vertical region.

[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 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 circumferential surface 23a in the vertical direction is greater than the inclination angle of the upper end portion of the sealing tapered inner circumferential surface 24a in the vertical direction (at any position in the vertical direction of the upper tapered inner circumferential surface 23a). As shown in Figure 2, the inner surface of the upper threaded region 23 formed in this manner is located throughout its entirety on the outer periphery of an imaginary taper surface T which is an upward extension of the sealing taper inner surface 24a (i.e., an upward extension of the upper end portion of the sealing taper inner surface 24a).

[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, 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 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 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 sections 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 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 / 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 area of ​​the 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 the vertical direction 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 increases in diameter as it approaches the upward direction over 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 the inner circumferential 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, such as one consisting only of 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 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 tapered so that its diameter increases as it extends upward. The inclination angle of the third tapered inner circumferential surface 25a in the vertical direction is greater than the inclination angle of the upper end portion of the sealing tapered inner circumferential surface 24a in the vertical direction (at any position in the vertical direction of the third tapered inner circumferential surface 25a).

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

[0024] Moreover, 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 has a circular shape when cut along a plane perpendicular to the up-down direction over the entire area.

[0025] The connector 30 is made of a synthetic resin or the like, and is connected to the 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, the upper end surface of the spout tubular 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 tubular 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 peripheral side of the upper end side region 22, a connector upper side region 33 that is inserted into the inner peripheral side of the upper threaded region 23, a connector lower side region 34 that is inserted into the inner peripheral side of the spout lower side region 24, and a connector lower end side region 35 that is inserted into the inner peripheral side of the protrusion region 25.

[0027] 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 / injection tubular 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 32-35 of the connector injection / discharge 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 32-35 of the connector injection / discharge 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. Moreover, the inner circumferential surface of each of the portions 32 to 35 of the connector injection / injection 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 a connector thread portion 37a on its inner periphery that can be screwed onto the spout thread portion 23b in a state in which the connector 30 is connected to the spout 20.

[0029] Next, the relationship between the inner circumferential surface of spout tubular portion 21 and the outer circumferential surface of connector pouring / discharging tubular portion 31 in a state in which connector 30 is connected to spout 20 will be described below.

[0030] First, the outer diameter of the sealing taper outer surface 34a of the connector lower region 34 is designed to be larger than the inner diameter of the sealing taper inner surface 24a (at the corresponding location during 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 taper outer surface 34a is inserted into the inner side of the sealing taper inner surface 24a so that a first tightening gap is created between the sealing taper inner surface 24a, thereby creating a seal 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 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 part of the tightening margin between the upper threaded region 23 and the connector upper region 33 is smaller than the tightening margin at the smallest part 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 a gap is generated between the connector upper region 33 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 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 among the first tightening margins described above), or so that the top plate side region 32 contacts the inner surface of the top end side region 22 without generating a tightening margin between the top end side region 22 and the top plate side region 32, or so that the top end side region 32 is inserted into the top end side region 22 so that a gap is generated between the top end side region 22 and the top plate side region 32.

[0033] Also, 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.

[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 out.

[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 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 tube 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 the 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 sealing performance 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 / injection tubular portion 31.

[0040] 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.

[0041] Although the embodiment of the present invention has been described in detail above, the present invention is not limited to the above embodiment, and various design modifications can be made without departing from the present invention described 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] 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 circumferential surface of the upper end region 22, and an inner ring portion 43 that contacts the inner circumferential 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 peripheral surface 23b Spout thread 24 Lower spout area 24a: Sealing tapered inner surface 25 ··· Region with protrusions 25a: Third tapered inner surface 25b... Annular protrusion 26 Container mounting part 30 ··· Connector 31 Connector injection / discharge tube portion 31a ··· Pour flow path 32 Top plate area 33 Connector upper side area 34: Lower connector area 34a: Sealing tapered outer periphery 35: Connector bottom area 36 Top plate 37 Skirt section 37a Connector screw part 40 ··· Cap 41 Top plate 41a Contact ring part 42 Skirt section 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 / 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.

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

3. 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.

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

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 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.

6. A spout 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 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.

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

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

10. 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.

11. 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 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, 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.

Images