Cap integrated pouring tool

The cap-integrated pouring tool addresses the issue of reduced sealing performance due to external contact by redesigning the cap-side seal portion to be below the cap-side locking projection and forming the spout-side seal annularly, ensuring effective sealing and protection from scratches.

JP2025072942APending Publication Date: 2025-05-12NIPPON CLOSURES
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Patent Information

Application Number
JP2023183437
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Filing Date
2023-10-25
Publication Date
2025-05-12

AI Technical Summary

Technical Problem

The cap-integrated pouring tool in existing technologies faces issues with external objects easily contacting the cap-side seal portion, leading to potential scratches on the cap-side locking projection and reduced sealing performance.

Method used

The cap-integrated pouring tool is designed with the cap-side seal portion formed below the cap-side locking projection, ensuring it does not protrude towards the outer circumference, and the spout-side seal protrudes annularly from the inner surface of the spout-side locking portion, enhancing the sealing between the spout and cap portions.

Benefits of technology

This design ensures a good sealing property between the spout pouring cylinder and the cap plug portion, preventing scratches and maintaining the sealing performance even when external objects come into contact.

✦ Generated by Eureka AI based on patent content.

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Abstract

To provide a cap integrated pouring tool which satisfactorily ensures sealing between a spout pouring cylindrical part and a cap plug part.SOLUTION: A cap-integrated pouring tool 10 includes: a spout part 20 that can be attached to a container mouth part C1; and a cap part 30 that is integrally connected to the spout part 20 by a to-be-broken part 40. After unsealing by breaking the to-be-broken part 40, a cap plug part 31 of the cap part 30 can be inserted into and fitted into a spout pouring cylindrical part 21 of the spout part 20, a spout-side seal projection part 23 of the spout part 20 is formed to project annularly from an inner peripheral surface of the spout pouring cylindrical part 21 below a spout-side locking part 22, and a cap side seal part 33 of the cap part 30 is formed below a cap side locking projection part 32 on an outer peripheral surface of the cap plug part 31 so as not to protrude to an outer peripheral side beyond the cap side locking projection part 32.SELECTED DRAWING: Figure 3
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Description

[Technical field]

[0001] The present invention relates to a cap-integrated pouring device that includes a spout portion that can be attached to the mouth of a container, and a cap portion that is integrally connected to the spout portion by a portion that is intended to break, and that, after opening by breaking the portion that is intended to break, can be fitted by inserting the cap plug portion of the cap portion into the spout pouring tube portion of the spout portion.

[0002] Conventionally, there has been known a cap-integrated pouring device which comprises a spout portion which can be attached to the mouth of a container and a cap portion which is integrally connected to the spout portion by a portion which is intended to break, and which, after opening by breaking the portion which is intended to break, can be fitted by inserting the cap plug portion of the cap portion into the spout pouring tube portion of the spout portion (see, for example, Patent Document 1).

[0003] In the cap-integrated dispensing device of Patent Document 1, when the cap plug portion is inserted into the spout dispensing tube portion, a cap side locking protrusion (threaded thread) is formed on the outer peripheral surface of the cap plug portion to prevent the cap plug portion from coming off the spout dispensing tube portion, and a cap side sealing portion (annular protrusion) for sealing between the spout dispensing tube portion and the cap plug portion is formed on the outer peripheral surface of the cap plug portion above the cap side locking protrusion (threaded thread). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2008-056271 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, in the cap-integrated dispensing device of Patent Document 1, the cap side seal portion (annular protrusion) is formed to protrude further outward than the cap side locking protrusion (threaded thread) (in other words, the diameter of the cap side seal portion is designed to be larger than the diameter of the cap side locking protrusion), so that when the cap plug portion is inserted into the spout dispensing tube portion, the cap side seal portion is in close contact with the inner surface of the spout dispensing tube portion.However, since the cap side seal portion protrudes further outward than the cap side locking protrusion, there is a problem that the cap side seal portion is easily brought into contact with external objects during distribution of the product, etc., and such contact may damage the cap side locking protrusion, which may reduce the sealing performance of the cap side locking protrusion.

[0006] Therefore, the present invention is intended to solve these problems and aims to provide a cap-integrated spouting device that has a simple configuration and ensures good sealing between the spout spout tube portion and the cap stopper portion. [Means for solving the problem]

[0007] The present invention relates to a cap-integrated pouring tool that includes a spout portion that can be attached to a container mouth, and a cap portion that is integrally connected to the spout portion by a portion to be broken, and that, after opening by breaking the portion to be broken, can be fitted by inserting a cap plug portion of the cap portion into a spout pouring tube portion of the spout portion, and the cap portion has a cap side locking projection formed to protrude from an outer circumferential surface of the cap plug portion, and a cap side seal portion, and the spout portion engages with the cap side locking projection to lock the spout pouring tube portion when the cap plug portion is inserted into the spout pouring tube portion. The problem is solved by having a spout side engagement portion that prevents the cap plug portion from coming off the tubular portion, and a spout side seal protrusion that comes into close contact with the cap side seal portion to seal between the spout pouring tubular portion and the cap plug portion, the spout side seal protrusion being formed so as to protrude in a ring shape from the inner surface of the spout pouring tubular portion below the spout side engagement portion, and the cap side seal portion being formed below the cap side engagement protrusion on the outer circumferential surface of the cap plug portion so as not to protrude outer than the cap side engagement protrusion. In the cap-integrated spouting tool described above, the cap-side seal portion may be inserted and disposed within the spout spout cylindrical portion before being opened. In any of the above-mentioned cap-integrated pouring fixtures, the spout side sealing protrusion may be formed to protrude from the inner surface of the spout pouring tube portion through a hollowed-out portion formed on the underside of the spout side sealing protrusion, so that its inner end portion faces the inner surface of the spout pouring tube portion. In any of the above-mentioned cap-integrated pouring devices, the spout portion has an attachment portion for attaching the spout portion to a container mouth portion, the attachment portion is formed so as to be attached to the container mouth portion by thermal welding, and the outer peripheral base portion of the spout side seal protrusion connected to the inner peripheral surface of the spout pouring tube portion may be located above the attachment portion. In any of the above-mentioned cap-integrated pouring devices, the intended breaking portion may have an annular connecting portion formed in a ring shape on the outer circumferential side of the cap stopper portion and connecting the outer circumferential surface of the cap stopper portion and the inner circumferential surface of the spout pouring tube portion. Effect of the Invention

[0008] According to the present invention, good sealing performance between the spout pouring tube portion and the cap portion can be ensured with a simple configuration. [Brief description of the drawings]

[0009] [Figure 1] FIG. 2 is an explanatory diagram showing a cap-integrated spout according to one embodiment of the present invention. [Diagram 2] FIG. 2 is an explanatory diagram showing a cap-integrated spout as viewed from the side and above. [Diagram 3] FIG. 2 is a cross-sectional view showing the cap-integrated spout before opening. [Figure 4] 4 is a cross-sectional view showing a state in which the cap portion is inserted into the spout pouring tube portion. FIG. [Diagram 5] FIG. 4 is an explanatory diagram showing a part that is molded using a core during injection molding. [Figure 6] 13A and 13B are explanatory diagrams showing modified examples of the spout-side locking portion and the cap-side locking projection. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, a cap-integrated spout 10 according to one embodiment of the present invention will be described with reference to the drawings.

[0011] First, the cap-integrated dispensing device 10 is formed as an injection-molded product integrally molded from a synthetic resin such as linear low-density polyethylene (LLDPE) and is attached to a container mouth portion C1 of a container C, such as a pouch for storing liquid contents such as liquid detergent or drinking water. As shown in Figures 1 to 3, it comprises a spout portion 20 that can be attached to the container mouth portion C1, and a cap portion 30 that is integrally connected to the spout portion 20 by a breakable portion 40, and is configured so that after opening by breaking the breakable portion 40, the cap plug portion 31 of the cap portion 30 can be inserted and fitted into the spout dispensing tube portion 21 of the spout portion 20.

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

[0013] The spout portion 20 is a portion that is attached to the container mouth portion C1 and functions as an outlet for the container contents, and as shown in Figures 1 to 3, has a cylindrical spout pouring tube portion 21, a spout side engagement portion 22, a spout side seal protrusion 23, an attachment portion 24, a flange 25, an anti-rotation portion 26, and a hole portion 27.

[0014] As shown in Figures 3 and 4, the spout pouring tube portion 21 is formed through in the vertical direction, and in this embodiment has a through hole with a cylindrical inner surface, and functions as a pouring path for the container contents.

[0015] As shown in Figure 4, the spout side locking portion 22 is a portion that engages with the cap side locking protrusion 32 to prevent the cap plug portion 31 from coming off the spout pouring tube portion 21 when the cap plug portion 31 is inserted into the spout pouring tube portion 21. In this embodiment, the spout side locking portion 22 is formed to protrude from the inner surface of the spout pouring tube portion 21 and is formed as a threaded portion that can engage (screw) with the cap side locking protrusion 32.

[0016] As shown in Figures 3 and 4, the spout side seal protrusion 23 is formed to protrude in a ring shape from the inner surface of the spout pouring tube portion 21 below the spout side engagement portion 22, and is a portion that comes into close contact with the cap side seal portion 33 to seal between the spout pouring tube portion 21 and the cap plug portion 31 when the cap plug portion 31 is inserted into the spout pouring tube portion 21 as shown in Figure 4. As shown in Figure 3, spout side seal protrusion 23 is formed so that its inner end portion 23b protrudes more inward than spout side engagement portion 22 (when viewed in the vertical direction); in other words, the innermost portion of spout side seal protrusion 23 (the portion located most inward on the inner surface of spout side seal protrusion 23) is formed so that it is located more inward than the innermost portion of spout side engagement portion 22 (the portion located most inward on the inner surface of spout side engagement portion 22).

[0017] As shown in Figure 3, the spout side seal protrusion 23 is formed to protrude from the inner surface of the spout pouring tube portion 21 through a ring-shaped hollowed-out portion 23c, which is a gap formed on the lower side of the spout side seal protrusion 23, so that its ring-shaped inner end portion 23b faces the inner surface of the spout pouring tube portion 21 and moves closer to the inner side as it extends downward. Furthermore, the outer peripheral base portion 23a of the spout side sealing protrusion 23 (in this embodiment, the entire spout side sealing protrusion 23) which is connected to the inner peripheral surface of the spout injection tube portion 21 is located above the mounting portion 24, as shown in Figure 3, and more specifically, as can be seen from Figures 1 to 3, the outer peripheral base portion 23a is located on the inner peripheral side of the flange 25 formed above the mounting portion 24.

[0018] As shown in Figures 1 and 2, the attachment portion 24 is a portion for attaching the spout portion 20 to the container mouth portion C1, and in this embodiment, it is formed so as to be attached to the container mouth portion C1 by heat welding. Specifically, it is sandwiched between the resin films that make up the container C, and is fixed by heat welding the inner surface of the resin films to the outer surface of the attachment portion 24.

[0019] As shown in Figures 1 and 2, the flange 25 is a plate-shaped portion formed adjacent to the upper side of the mounting portion 24 and protruding outward from the outer circumferential surface of the mounting portion 24 to which the resin film is welded.

[0020] As shown in Figures 1 and 2, the anti-rotation portion 26 is formed on the upper side of the flange 25, and is a portion that engages with the lower portion of the operating portion 35 of the cap portion 30 to regulate the rotation of the cap portion 30 (operating portion 35) when the cap portion 30 is rotated relative to the spout portion 20 and the cap plug portion 31 is inserted and fitted into the spout pouring tube portion 21 after the intended breaking portion 40 has broken.

[0021] As shown in Figure 3, hole portion 27 is a non-through hole formed to open to the underside of the spout body. By forming such hole portion 27, it is possible to prevent sink marks from occurring on the outer surface of the spout body (particularly the outer surface of the attachment portion 24) during injection molding of the cap-integrated spouting device 10.

[0022] The cap portion 30 functions as a cap that seals the spout injection tube portion 21 after the intended breaking portion 40 breaks, and as shown in Figure 3, has a cap stopper portion 31, a cap side locking protrusion 32, a cap side seal portion 33, a lid portion 34, and an operating portion 35.

[0023] As shown in Figs. 3 and 4, the cap plug portion 31 is a portion that is inserted into the spout pouring tube portion 21 when the cap portion 30 is fitted to the spout portion 20 after the portion to be broken 40 is broken. In this embodiment, the cap plug portion 31 has an outer circumferential surface that is circular in cross section, and the outer circumferential surface on the lower end side is formed into a tapered surface whose diameter decreases toward the lower side. In this embodiment, as shown in Figures 3 and 4, the cap plug portion 31 is formed as a tubular (cylindrical) portion, but the specific form of the cap plug portion 31 is not limited to a tubular shape, and the cap plug portion 31 may be formed as a solid body.

[0024] As shown in Figures 3 and 4, the cap side locking protrusion 32 is a portion that engages with the spout side locking portion 22 to prevent the cap plug portion 31 from coming out of the spout pouring tube portion 21 when the cap plug portion 31 is inserted into the spout pouring tube portion 21. In this embodiment, the cap side locking protrusion 32 is formed to protrude from the outer peripheral surface of the cap plug portion 31 and is formed as a screw portion that can engage (screw) with the spout side locking portion 22.

[0025] As shown in Figures 3 and 4, the cap side seal portion 33 is an annular portion that adheres closely to the spout side seal protrusion 23 to seal between the spout pouring tube portion 21 and the cap plug portion 31 when the cap plug portion 31 is inserted into the spout pouring tube portion 21. As shown in Figs. 3 and 4, in this embodiment, the cap side seal portion 33 is formed as an outer circumferential surface of the lower end portion of the cap plug portion 31.

[0026] As shown in Figure 3, the cap side seal portion 33 is formed below the cap side locking protrusion 32 on the outer peripheral surface of the cap plug portion 31 in the radial direction (horizontal direction on the paper in Figure 3) so as not to protrude further outward than the cap side locking protrusion 32 (when viewed in the up-down direction).In this embodiment, the outermost part of the cap side seal portion 33 (the part located on the outermost side of the outer peripheral surface of the cap side seal portion 33) is formed to be located more inner than the outermost part of the cap side locking protrusion 32 (the part located on the outermost side of the outer peripheral surface of the cap side locking protrusion 32). Furthermore, as shown in FIG. 3, the cap side seal portion 33 is inserted and positioned within the spout pouring tube portion 21 before opening (before the intended rupture portion 40 is ruptured), in other words, it is formed in a portion of the cap stopper portion 31 that is inserted and positioned within the spout pouring tube portion 21 before opening, and more specifically, it is formed below the annular connecting portion 41 as the intended rupture portion 40.

[0027] As shown in Figures 1 to 3, the lid portion 34 is formed on the upper side of the cap stopper portion 31 and functions as a lid that closes the spout pouring tube portion 21 from above when the cap portion 30 is fitted to the spout portion 20 after the intended breaking portion 40 is broken.

[0028] The operating portion 35 is a plate-like portion that allows a user to grasp and operate the cap portion 30 .

[0029] The breakable portion 40 connects the cap portion 30 and the spout portion 20 before opening, and is a portion that breaks when the cap-integrated spouting tool 10 is opened. As shown in Figure 3, the cap-integrated dispensing device 10 has, as the intended breaking portion 40, an annular connecting portion 41 formed in a ring shape on the outer circumferential side of the cap stopper portion 31 and connecting the outer circumferential surface of the cap stopper portion 31 to the inner circumferential surface of the spout dispensing tube portion 21, and a connecting portion 42 connecting a part of the operating portion 35 to the spout portion 20. In addition, the annular connecting portion 41 is a breakable annular thin-walled portion (score) and not only has the function of connecting the spout portion 20 and the cap portion 30, but also has the function of sealing the spout pouring tube portion 21 before it is broken.

[0030] In the cap-integrated pouring tool 10 of this embodiment, after opening by breaking the intended breaking portion 40, the cap plug portion 31 is inserted into the spout pouring tube portion 21, and the cap plug portion 31 is fitted to the spout portion 20 as shown in Figure 4. In the fitted state (cap-closing completed state) shown in FIG. 4, the lower portion of the operating portion 35 engages with the anti-rotation portion 26, and rotation of the cap portion 30 relative to the spout portion 20 is restricted. In addition, in the engaged state shown in Figure 4, the lower surface of the lid portion 34 and the upper end surface of the spout pouring tube portion 21 (or the upper end surface of the spout portion 30) are in close contact with each other, and the outer peripheral surface of the cap side seal portion 33 and the inner peripheral surface of the spout side seal protrusion 23 are in close contact with each other, thereby preventing the contents of the container C from leaking out. In addition, in the fitted state shown in Figure 4, the remaining portion 41a of the annular connecting portion 41 (provisional breaking portion 40) on the cap portion 30 side after breaking is positioned so as not to contact the inner surface of the spout side sealing protrusion 23.

[0031] In the cap-integrated dispensing device 10 of this embodiment obtained in this manner, the spout side sealing protrusion 23 for sealing between the spout dispensing tube portion 21 and the cap stopper portion 31 when engaged is formed to protrude annularly from the inner surface of the spout dispensing tube portion 21 below the spout side engaging portion 22, so that the cap side sealing portion 33 can be formed below the cap side engaging protrusion 32 on the outer peripheral surface of the cap stopper portion 31 in a manner that does not protrude outer than the cap side engaging protrusion 32.This prevents the cap side engaging protrusion 32 from being damaged by contact with external objects during distribution of the product, etc., and prevents the sealing performance of the cap side engaging protrusion 32 from being reduced.

[0032] Furthermore, since the cap side sealing portion 33 is inserted and positioned within the spout pouring tube portion 21 before opening, as shown in Figures 3 and 5, it is possible to prevent the cap side locking protrusion 32 from being scratched due to contact with external objects during distribution of the product, etc., and it is also possible to prevent a parting line from being formed on the outer surface of the cap side locking protrusion 32, thereby preventing a decrease in the sealing performance of the cap side locking protrusion 32 due to the formation of the parting line. In other words, during injection molding of the cap-integrated spout 10, the hollow portion of the cap-integrated spout 10 (the portion indicated by the symbol R in Figure 5) is formed using a core (mold), so no parting line is formed in this portion, whereas the outer portion of the cap-integrated spout 10 other than the hollow portion is formed using multiple molds, so a protruding parting line is formed in this outer portion at the joint of the mold. Furthermore, if the cap side locking protrusion 32 is formed on the portion of the cap stopper portion 31 that is positioned outside the spout pouring tube portion 21, a parting line will be formed on the outer surface of the cap side locking protrusion 32, and the formation of this parting line will reduce the sealing performance of the cap side locking protrusion 32. However, in this embodiment, by forming it on the portion of the cap stopper portion 31 that is inserted and positioned within the spout pouring tube portion 21 (the portion indicated by symbol R in Figure 5), it is possible to avoid the reduction in sealing performance caused by the formation of the above-mentioned parting line.

[0033] In addition, the spout side seal protrusion 23 is formed to protrude from the inner surface of the spout pouring tube portion 21 through the hollowed-out portion 23c formed on the underside of the spout side seal protrusion 23, so that its inner end portion 23b faces the inner surface of the spout pouring tube portion 21.This allows the spout side seal protrusion 23 to be smoothly released (elastically deformed) downward and toward the outer periphery when demolding in injection molding (specifically, when the above-mentioned core is removed by force removal or rotational removal), thereby improving the moldability of the cap-integrated pouring device 10.

[0034] Furthermore, since the outer peripheral base 23a of the spout side seal protrusion 23 is located above the attachment part 24 which is attached to the container mouth C1 by heat welding, deformation of the spout side seal protrusion 23 due to the heat generated when attaching the attachment part 24 to the container mouth C1 by heat welding can be prevented, thereby ensuring good sealing performance by the spout side seal protrusion 23.

[0035] 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 described in the claims, such as forming a cap-integrated spout 10 by any combination of the respective configurations of the above or following embodiments and modified examples.

[0036] For example, in the above-described embodiment, the container C to which the cap-integrated dispensing device 10 is attached is described as a pouch, but the specific form of the container C is not limited to a pouch and may be any type, such as a paper pack. In addition, in the above-described embodiment, the cap-integrated pouring tool 10 is described as being attached to the container mouth portion C1 by thermal welding, but the manner of attachment of the cap-integrated pouring tool 10 to the container mouth portion C1 is not limited to thermal welding, and any manner that can fix the cap-integrated pouring tool 10 to the container mouth portion C1 is acceptable.

[0037] In addition, in the above-mentioned embodiment, the spout side locking portion 22 and the cap side locking projection 32 are described as being formed as screw portions that can engage with each other, but the specific form of the spout side locking portion 22 and the cap side locking projection 32 may be any that can engage with each other to prevent the cap plug portion 31 from coming off the spout pouring tube portion 21 when the cap plug portion 31 is inserted into the spout pouring tube portion 21. For example, as in the modified example shown in Figure 6(a), the spout side locking portion 22 may be formed as a portion protruding in a ring shape from the inner surface of the spout pouring tubular portion 21, and the cap side locking projection 32 may be formed as a portion protruding in a ring shape from the outer surface of the cap plug portion 31. When the cap plug portion 31 is inserted into the spout pouring tubular portion 21, the spout side locking portion 22 and the cap side locking projection 32 may engage (be hooked) in the vertical direction to prevent the cap plug portion 31 from coming off the spout pouring tubular portion 21. Furthermore, as in the modified example shown in Figure 6 (b), the cap side locking protrusion 32 may be formed as a ring-shaped protrusion from the outer peripheral surface of the cap plug portion 31, and the cap side locking protrusion 32 may be inserted (lightly pressed in) into the spout side locking portion 22 which is part of the inner peripheral surface of the spout pouring tube portion 21, thereby preventing the cap plug portion 31 from coming off the spout pouring tube portion 21 when the cap plug portion 31 is inserted into the spout pouring tube portion 21.

[0038] In addition, in the above-described embodiment, the cap side seal portion 33 is formed as the outer peripheral surface of the lower end portion of the cap plug portion 31, in other words, it is formed as a portion that does not protrude from the outer peripheral surface of the cap plug portion 31. However, the cap side seal portion 33 may be formed as a portion that protrudes from the outer peripheral surface of the cap plug portion 31 to the extent that the cap side seal portion 33 does not protrude outer circumferentially beyond the cap side engagement protrusion 32. In addition, in the above-described embodiment, the cap side seal portion 33 is described as being inserted and positioned within the spout pouring tube portion 21 before opening, but the cap side seal portion 33 may be formed so as to be positioned outside the spout pouring tube portion 21 (above the spout pouring tube portion 21) before opening.

[0039] In addition to the above-mentioned cap side seal portion 33, a second cap side seal portion (not shown) for sealing between the spout pouring tube portion 21 and the cap plug portion 31 by coming into close contact with the inner peripheral surface of the spout pouring tube portion 21 with the cap plug portion 31 inserted into the spout pouring tube portion 21 may be formed to protrude from the outer peripheral surface of the cap plug portion 31 above the cap side locking projection 32. When such a second cap side seal portion is provided, not only is the sealing performance improved, but the insertion of the second cap side seal portion into the spout pouring tube portion 21 allows the user to perceive that the cap plug portion 31 has been fully inserted into the spout pouring tube portion 21. [Explanation of symbols]

[0040] 10. Cap-integrated spout 20 ··· Spout section 21 Spout pouring tube part 22 .... Spout side locking portion 23 Spout side seal protrusion 23a... Outer circumference side base 23b: Inner circumference end 23c ··· Hollowed out section 24. Mounting part 25 ··· Flange 26 ··· Anti-rotation part 27 · · Hole 30 Cap part 31 Cap part 32 Cap side locking protrusion 33 Cap side seal 34... Lid part 35...Operation section 40: Breaking section 41 Annular connection part 41a: The remainder 42... Connecting part C... Container C1...Container opening

Claims

1. A cap-integrated pouring tool includes a spout portion that can be attached to a container mouth, and a cap portion that is integrally connected to the spout portion by a breakable portion, and after opening by breaking the breakable portion, a cap plug portion of the cap portion can be inserted and fitted into a spout pouring tube portion of the spout portion, The cap portion has a cap side locking protrusion formed to protrude from an outer circumferential surface of the cap plug portion, and a cap side seal portion, the spout portion has a spout-side locking portion that engages with the cap-side locking projection to prevent the cap plug portion from coming off from the spout pouring cylindrical portion when the cap plug portion is inserted into the spout pouring cylindrical portion, and a spout-side seal projection that comes into close contact with the cap-side seal portion to seal between the spout pouring cylindrical portion and the cap plug portion, The spout-side seal protrusion is formed to protrude in an annular shape from the inner circumferential surface of the spout pouring cylindrical portion below the spout-side engaging portion, A cap-integrated pouring tool characterized in that the cap side seal portion is formed below the cap side locking protrusion on the outer peripheral surface of the cap stopper portion so as not to protrude outer than the cap side locking protrusion.

2. 2. The cap-integrated pouring tool according to claim 1, wherein the cap-side seal portion is inserted and disposed within the spout pouring tube portion before opening.

3. The cap-integrated pouring fixture described in claim 1, characterized in that the spout side seal protrusion is formed to protrude from the inner surface of the spout pouring tube portion so that its inner end portion faces the inner surface of the spout pouring tube portion through a hollowed-out portion formed on the underside of the spout side seal protrusion.

4. The spout portion has an attachment portion for attaching the spout portion to a container mouth portion, The mounting portion is formed to be mounted to the container mouth by thermal welding, 2. The cap-integrated pouring tool according to claim 1, wherein an outer peripheral base portion of the spout-side seal projection connected to an inner peripheral surface of the spout pouring tube portion is located above the mounting portion.

5. The cap-integrated pouring tool as described in claim 1, characterized in that the intended breaking portion has an annular connecting portion formed in an annular shape on the outer circumferential side of the cap stopper portion and connecting the outer circumferential surface of the cap stopper portion and the inner circumferential surface of the spout pouring tube portion.

Citation Information

Patent Citations

  • Cap-integrated spout

    JP2008056271A