JP2020189635A - Spout plug and packaging container with the same - Google Patents

Abstract

To provide a spout plug and a packaging container with the same capable of suppressing load at the time of opening while ensuring a sealability at the time of re-plugging.SOLUTION: In a spout plug, a cap side abutting portion and a partition side abutting portion are respectively formed in a top surface portion and a partition wall. A thin portion is formed in the partition wall. In a state where the cap side abutting portion and the partition side abutting portion are abutting each other, when the cap is further rotated with a predetermined force in a direction in which screwing is released, the predetermined force is acted on the thin portion via the cap side abutting portion and the partition side abutting portion to break the thin portion, so that the partition wall can be separated from a cylinder portion and opened, an outer peripheral surface of an inner ring and an inner peripheral surface of the cylinder portion are in close contact with each other over an entire circumference from a state where the cap is attached to a spout body until rotating by a predetermined angle in a direction of releasing the screwing, and the close contact is released when the cap side abutting portion and the partition side abutting portion are engaged with each other.SELECTED DRAWING: Figure 1

Description

The present invention relates to a spout plug provided at a pouring position of a packaging container.

As a packaging container for fluid contents such as liquids, powders, and granules, those provided with a resin spout / outlet plug are widely used. The spout / outlet plug includes a spout main body including a cylindrical tubular portion and a partition wall that closes the inside thereof, and a cap attached over the spout main body. The partition wall is provided with an annular thin wall portion and a pull ring. In such an outlet plug, by pulling the pull ring provided on the partition wall, the partition wall is broken along the thin wall portion, and the partition wall can be removed from the spout main body to open the plug. Further, even after opening the cap, the cap can be re-plugged by attaching the cap to the spout main body again.

With such a spout plug, a structure of a spout plug that can be opened more easily has been studied because it is difficult to grasp the pull ring when the spout plug is small. For example, Patent Documents 1 and 2 disclose a spout plug in which an inner cylinder is formed in a cap so that it can be engaged with an engaging means provided on a partition wall when the plug is turned in the opening direction. According to the spout plugs of Patent Documents 1 and 2, a force for rotating the cap can be applied to the partition wall via the inner cylinder to break the thin portion. Therefore, at the time of opening the cap, the thin portion can be broken at the same time as the rotation of the cap, and the cap can be easily opened.

Japanese Unexamined Patent Publication No. 2013-209103 Japanese Unexamined Patent Publication No. 2018-158761

The caps of these spout plugs are provided with an inner ring that is in close contact with the inner peripheral surface of the cylinder portion of the spout body when attached to the spout body in order to ensure the sealing property at the time of re-plugging. .. For this reason, when opening the cap, in addition to the force required to break the thin-walled portion, it is necessary to apply a force to the cap that exceeds the resistance force caused by the frictional force generated between the inner ring and the tubular portion, which causes a load. There was a problem that it was difficult for users with high and weak power to open the cap.

The present invention has been made in view of such a problem, and a spout / outlet plug capable of suppressing a load at the time of opening while ensuring a sealing property at the time of re-plugging and a packaging container using the same are provided. The purpose is to provide.

One aspect of the present invention for solving the above problems includes a cylindrical cylinder portion on which an external screw is formed, a partition wall that closes the inside of the cylinder portion, and a flange that extends outward from one end of the cylinder portion. A ceiling that covers the main body of the spout, a cylindrical side wall on which an internal screw that screws with an external screw is formed, a cylindrical inner ring provided on the inner peripheral side of the side wall, and one end of the side wall and one end of the inner ring. It is a spout plug that has a face portion and consists of a cap that covers the cylinder of the spout body and is attached with the external screw and the internal screw screwed together. The top surface and partition wall have caps. A cap-side contact portion and a partition-side contact portion that come into contact with each other are formed by rotating a predetermined angle in the direction of releasing the screw from the state of being attached to the spout body, and the partition wall-side contact portion is formed. A direction in which the cap is unscrewed in a state where an annular thin-walled portion is formed that surrounds the portion and the center overlaps with the central axis of the cylindrical portion, and the cap side contact portion and the partition side contact portion are in contact with each other. When the screw is further rotated with a predetermined force, the predetermined force acts on the thin-walled portion via the cap-side contact portion and the partition wall-side contact portion to break the thin-walled portion, and the partition wall is separated from the cylinder portion to open the cap. The outer peripheral surface of the inner ring and the inner peripheral surface of the cylinder portion cover the entire circumference from the state where the cap is attached to the main body of the spout until it rotates by a predetermined angle in the direction of releasing the screw. It is a spout plug that is in close contact and is released from close contact when the cap side contact portion and the partition side contact portion are engaged with each other.

Another aspect of the present invention is a packaging container provided with the above-mentioned spout plug.

According to the present invention, it is possible to provide a spout plug that can suppress a load at the time of opening while ensuring a sealing property at the time of re-plugging, and a packaging container using the same.

Cross-sectional view of the spout plug according to the first embodiment of the present invention Cross-sectional view of the spout plug according to the first embodiment of the present invention Enlarged sectional view of the spout plug according to the first embodiment of the present invention. Sectional drawing which shows the positional relationship at the time of opening of the spout outlet plug which concerns on 1st Embodiment of this invention. Partial enlarged view of the spout plug according to the first embodiment of the present invention Partial enlarged view of the spout plug according to the first embodiment of the present invention Cross-sectional view of the spout plug according to the second embodiment of the present invention. Partial enlarged view of the spout plug according to the second embodiment of the present invention.

[First Embodiment]
The spout plug 100 according to the first embodiment of the present invention will be described with reference to the drawings. 1 to 3 are cross-sectional views of a spout plug 100 according to the present embodiment, which is in a state before the cap is opened. FIG. 1 is a vertical cross-sectional view of the spout plug 100 cut along the line BB'of FIG. 2, and FIG. 2 is a cross-sectional view of the spout plug 100 cut along the line AA' of FIG. Yes, FIG. 3 is an enlarged view of a portion C surrounded by a dotted line in FIG.

The spout plug 100 includes a spout main body 10 and a cap 20 attached to the spout main body 10 in a screwed state. The spout plug 100 can be opened by separating the partition wall 12 described later from the spout main body 10 by rotating the attached cap 20 in the screwing release direction, and after opening the cap 20, the cap 20 is spouted. It can be re-plugged by screwing it into the main body 10. In the following, as shown in FIG. 1, the side on which the cap 20 of the spout body 10 is covered and attached is defined as the upper side, and the side opposite to the cap 20 is defined as the lower side, and the description will be made according to this definition. As an example, the screwing release direction is a counterclockwise direction when viewed from above, as shown by an arrow (white outline) in FIG.

(Mouth plug body)
The spout main body 10 includes a cylindrical tubular portion 11 on which an external screw 13 is formed, a partition wall 12 that closes the inside of the tubular portion 11, and a flange 17 that extends outward from one end edge of the tubular portion 11. It includes a partition wall side contact portion 14 formed on the inner peripheral side of the partition wall 12. By providing the flange 17, the spout plug 100 can be attached to a container body (not shown) by welding or the like for use. The shape of the inner peripheral surface of the tubular portion 11 is not limited, but as an example, as shown in FIG. 4, a tapered shape 11a may be formed so that the inner diameter increases toward the other end side.

As shown in FIGS. 1 and 2, the partition wall 12 is provided with a thin-walled portion 12a between the tubular portion 11 and the partition wall-side contact portion 14 that triggers breakage when the stopper is opened. The thin-walled portion 12a surrounds the partition wall-side contact portion 14, and is formed in an annular shape whose center overlaps with the central axis CL of the tubular portion 11.

The partition wall-side contact portion 14 is provided to transmit a force for rotating the cap 20 to the partition wall 12 when the cap-side contact portion 24, which will be described later, comes into contact with the partition wall-side contact portion 14 when the cap is opened. As an example, the partition wall side contact portion 14 is 90 in the circumferential direction on the inner peripheral surface of the cylindrical portion 16 connected via the thin wall portion 12a provided on the partition wall 12, as shown in FIGS. 1 and 2. Four are provided at intervals of °. As an example, each partition wall side contact portion 14 has a convex shape formed so as to extend in the extending direction of the central axis CL, and faces the portion in contact with the cap side contact portion 24 in the screwing release direction. It is provided with a recessed contact surface 14a.

When the partition wall-side contact portion 14 and the cap-side contact portion 24 are in contact with each other, the tip of each partition wall-side contact portion 14 engages with the cap-side engaging portion 25 described later to form a cap. A partition wall side engaging portion 15 that can regulate the relative movement of the partition wall 20 and the partition wall 12 so as to be separated from each other in the direction along the central axis CL is formed. As an example, the partition wall side engaging portion 15 has a linear convex shape formed so as to extend a predetermined length in the extending direction of the central axis CL.

The number of the partition wall side contact portions 14 is not limited as long as the rotating force of the cap 20 can be transmitted to the partition wall 12, but there are at least two in order to transmit the force to the entire circumference of the partition wall 12 in a well-balanced manner. Is preferable. Further, in the spout plug 100, the partition wall side contact portion 14 is formed so as to extend from the partition wall 12 toward the lower end side, but if the force of rotation of the cap 20 can be transmitted to the partition wall 12, the partition wall side The contact portion 14 may be formed so as to extend toward the upper end side.

(cap)
The cap 20 has a cylindrical side wall 21 on which an internal screw 23 screwed with an external screw 13 formed on the tubular portion 11 of the spout body 10 is formed, and a cylindrical side wall 21 provided on the inner peripheral side of the side wall 21. It has an inner ring 27, a top surface portion 22 that covers one end of the side wall 21 and one end of the inner ring 27, and a cap-side contact portion 24 provided on the top surface portion 22. As shown in FIG. 1, the inner ring 27 is formed so that the outer peripheral surface of the inner ring 27 is in close contact with the inner peripheral surface of the tubular portion 11 of the spout body 10 when the cap 20 is attached to the spout body 10. There is. As a result, the sealing property can be ensured even when the partition wall 12 is re-plugged after being separated. The shape of the outer peripheral surface of the inner ring 27 is not limited, but as an example, as shown in FIG. 4, a protruding portion 27a projecting in the circumferential direction may be formed.

The cap-side contact portion 24 is provided to transmit the force for rotating the cap 20 to the partition wall 12 by contacting the partition wall-side contact portion 14 when the cap is opened. As an example, as shown in FIGS. 1 and 2, four cap-side contact portions 24 are provided on the outer peripheral surface of the cylindrical portion 26 suspended from the top surface portion 22 at intervals of 90 ° in the circumferential direction. As an example, each cap-side contact portion 24 has a convex shape formed so as to extend in the stretching direction of the central axis CL, and can be fitted to the contact surface 14a of the partition wall-side contact portion 14. A contact surface 24a protruding in the screwing release direction is provided. By providing the partition wall side contact portion 14 and the cap side contact portion 24 with a contact surface 14a and a contact surface 24a that can be fitted to each other, the partition wall side contact portion 14 and the cap side contact portion 24 can be provided. Can be brought into contact with each other over a wide area, so that the force of rotation of the cap 20 can be transmitted to the partition wall 12 in a well-balanced manner.

When the partition wall side contact portion 14 and the cap side contact portion 24 abut on the surface of the cylindrical portion 26, the cap 20 and the partition wall 12 engage with each other with the partition wall side engaging portion 15. A cap-side engaging portion 25 that can regulate relative movement so as to be separated in a direction along the central axis CL is formed. As an example, the cap-side engaging portion 25 has a linear concave shape that extends a predetermined length in the extending direction of the central axis CL. If the partition wall side engaging portion 15 and the cap side engaging portion 25 can be engaged with each other, the partition wall side engaging portion 15 has a concave shape and the cap side engaging portion 25 has a convex shape. You may.

When the cap 20 is attached to the spout main body 10, the spout plug 100 is unscrewed between the contact surface 14a of the partition side contact portion 14 and the partition side contact portion 14 as shown in FIG. A predetermined distance (hereinafter, referred to as a free running section S) is provided in the circumferential direction between the contact surface 24a of the cap-side contact portion 24 adjacent to the direction. By having the idle section S, the force that the cap 20 rotates during a predetermined angle θ from the start of rotation of the cap 20 to the contact between the partition wall side contact portion 14 and the cap side contact portion 24. Is not transmitted to the partition wall 12. The angle θ can be, for example, about 60 °.

Further, the length of the inner ring 27 in the extending direction of the central axis CL is designed based on the angle θ. Specifically, the length of the inner ring 27 in the extension direction of the central axis CL is the length of the inner ring 27 from the state in which the cap 20 is attached to the spout body 10 until the inner ring 27 is rotated by an angle θ in the screw release direction. The length is such that the outer peripheral surface and the inner peripheral surface of the tubular portion 11 are in close contact with each other over the entire circumference, and the close contact is released when the cap side contact portion 24 and the partition wall side contact portion 14 are engaged with each other. It is formed.

In FIG. 2, when the cap 20 is attached to the spout main body 10, the cap side contact portion 24 is adjacent to the partition wall side contact portion in the screwing traveling direction opposite to the screwing release direction with respect to the central axis. Although it is in contact with the contact portion 14, if the idle section S can be provided, the cap side contact portion 24 is screwed with respect to the central axis in a state where the cap 20 is attached to the spout body 10. It may or may not be in contact with the partition wall side contact portion 14 adjacent in the direction.

The first attachment of the cap 20 to the spout main body 10 is performed, for example, by overcoming the external screw 13 on the internal screw 23 by a plug type in which the cap 20 is driven in the extending direction of the central axis CL with a constant force after positioning. be able to.

(About opening)
Next, the opening of the spout plug 100 will be described with reference to FIGS. 4 to 6. In FIG. 4, the partition wall side contact portion 14 and the cap side contact portion 24 are in contact with each other from the state where the cap 20 of the spout plug 100 is attached to the spout main body 10 ((a) in FIG. 4). After that, the partition wall side contact portion 14 and the cap side contact portion 24 (left figure) and the cylinder of the spout main body 10 up to the state where the fracture progressed to the entire circumference of the thin wall portion 12a ((d) in FIG. 4). It is sectional drawing which shows the positional relationship with the inner ring 27 (right figure) of a part 11 and a cap 20. Further, FIG. 5 is an enlarged view of a portion D surrounded by a dotted line in FIG. 4 (c), and FIG. 6 is an enlarged view cut along the EE'line of FIG. Note that (b) and (c) of FIG. 4 show a state between (a) of FIG. 4 and (d) of FIG.

As shown in FIG. 4A, when the cap 20 is attached to the spout main body 10, the spout plug 100 is the contact surface 14a of the partition wall side contact portion 14 and the cap side contact portion 24. An idle section S is provided between the contact surfaces 24a over the circumferential direction. At this time, as shown in the right figure of FIG. 4A, the outer peripheral surface of the inner ring 27 and the inner peripheral surface of the tubular portion 11 are in close contact with each other over the entire circumference. In this case, the close contact is, for example, a state in which the protruding portion 27a provided on the inner ring 27 is in contact with the inner peripheral surface of the tubular portion 11 over the entire circumference.

By applying a force that rotates in the screw release direction to the cap 20, the cap 20 starts rotating in the screw release direction as shown by an arrow in the left figure of FIG. 4 (b). As a result, the cap-side contact portion 24 moves in the idle section S, but since the partition wall-side contact portion 14 and the cap-side contact portion 24 are not in contact with each other, the force applied to the cap 20 is on the partition wall side. It is not transmitted to the contact portion 14.

As the cap 20 continues to rotate and rotates by an angle θ in the direction of unscrewing from the state of being attached to the spout main body 10, the partition wall side contact as shown in the left figure of FIG. 4C. The contact surface 14a of the contact portion 14 and the contact surface 24a of the cap side contact portion 24 come into contact with each other. At this time, the outer peripheral surface of the inner ring 27 and the inner peripheral surface of the tubular portion 11 are released from close contact with each other. When the protruding portion 27a and the tapered shape 11a of the tubular portion 11 are provided, the protruding portion 27a moves to a position facing the tapered shape 11a so that the protruding portion 27a and the inner peripheral surface of the tubular portion 11 The contact is released. That is, as shown in the right figure of FIG. 4B, the cap 20 moves upward at the same time as the rotation in the screwing release direction, but the cap 20 does not rotate up to the angle θ, so that the inner ring The outer peripheral surface of 27 and the inner peripheral surface of the tubular portion 11 are in close contact with each other over the entire circumference. Therefore, when the cap 20 is not rotated to the angle θ, the user receives a resistance force due to the frictional force generated by the close contact between the inner ring 27 and the tubular portion 11 when the cap 20 is rotated.

Further, as shown in FIGS. 5 and 6, the contact surface 14a of the partition wall side contact portion 14 and the contact surface 24a of the cap side contact portion 24 come into contact with each other, so that the partition wall side engaging portion 15 and the contact surface 15 It engages with the cap-side engaging portion 25. As a result, the cap 20 and the partition wall 12 are restricted from relatively moving so as to be separated from each other in the direction along the central axis CL.

When the cap 20 is further rotated in the screwing release direction with a predetermined force while the partition wall side contact portion 14 and the cap side contact portion 24 are in contact with each other, a predetermined force is applied to the cap side contact portion 24 and the partition wall. It acts on the partition wall 12 via the side contact portion 14. As a result, the partition wall 12 is twisted in the screwing release direction, and the twisting force acts in the circumferential direction of the thin portion 12a to start breaking. Then, as shown in the left figure of FIG. 4D, as the rotation of the cap 20 further progresses, stress is concentrated on the end of the fractured portion of the thin-walled portion 12a, and the fracture occurs on the entire circumference of the thin-walled portion 12a. proceed. At this time, the cap 20 moves further upward as shown in the right figure of FIG. 4D, and the lower end of the inner ring 27 moves to the vicinity of the upper end of the tubular portion 11. As described above, when the contact surface 14a of the partition wall side contact portion 14 and the contact surface 24a of the cap side contact portion 24 come into contact with each other, the outer peripheral surface of the inner ring 27 and the inner circumference of the tubular portion 11 Since the contact with the surface is released, the inner ring is rotated in the rotation of the cap 20 after the contact surface 14a of the partition wall side contact portion 14 and the contact surface 24a of the cap side contact portion 24 are in contact with each other. No resistance is generated due to the frictional force generated by the close contact between the 27 and the tubular portion 11. Therefore, at this time, in order to rotate the cap 20, only the force required for breaking the thin portion 12a needs to be applied to the cap 20. Then, as the rotation of the cap 20 further progresses, the partition wall 12 is separated from the spout body 10 along with the cap 20 by the engagement between the partition wall side engaging portion 15 and the cap side engaging portion 25, and is opened. Is completed.

In the spout plug 100 opened in this way, the cap 20 can be re-plugged by covering the tubular portion 11 of the spout main body 10 and rotating it in the screwing direction. By re-plugging, the outer peripheral surface of the inner ring 27 and the inner peripheral surface of the tubular portion 11 are brought into close contact with each other over the entire circumference again, so that the sealing property at the time of re-plugging can be ensured.

As described above, in the spout plug 100, the length of the inner ring 27 in the extending direction of the central axis CL is set to the outer peripheral surface of the inner ring 27 when the cap side contact portion 24 and the partition wall side contact portion 14 are engaged with each other. And, it is designed so that the close contact with the inner peripheral surface of the tubular portion 11 is released. As a result, when a force for breaking the thin-walled portion 12a is required, the user does not receive the resistance force due to the frictional force generated between the inner ring 27 and the tubular portion 11, so that the plug is re-plugged. The load for rotating the cap 20 at the time of opening can be suppressed while ensuring the sealing property at the time.

Further, since the spout plug 100 is completely opened when the cap 20 is rotated and removed, it is not necessary to separately remove the partition wall 12 as in the method of opening with a pull ring. Further, since the cap 20 is easy to pinch and apply torque, the burden on the user is smaller than that of pulling the pull ring to break the partition wall 12.

Further, since the separated partition wall 12 can be left in the cap 20 by engaging the partition wall side engaging portion 15 and the cap side engaging portion 25, one of the spout plugs 100 that came off after opening the cap. There is no need to dispose of the part.

Further, since the outlet plug 100 does not provide the pull ring on the partition wall 12, the degree of freedom in designing the position where the partition wall 12 is formed inside the tubular portion 11 is high. The position where the partition wall 12 is formed is not particularly limited, but as an example, it can be formed so as to have a distance D (see FIG. 1) of 5 mm or more from the flange 17 in the extending direction of the central axis CL. By setting the interval D to 5 mm or more, it is possible to prevent the thin portion 12a from being damaged by the ultrasonic waves transmitted to the partition wall 12 during ultrasonic welding in which the flange 17 is welded to the container body using ultrasonic waves. can do. That is, according to the spout plug 100, the partition wall 12 can be at least 5 mm or more higher than the position of the partition wall in the spout plug having a conventional pull ring.

Further, by providing the interval D of 5 mm or more, the partition wall side contact portion 14 can be formed so as to extend long from the partition wall 12 toward the lower end side, so that the partition wall side contact portion 14 and the cap side contact portion 14 can be formed. It is possible to secure the contact length with the 24 in the extending direction of the central axis CL. As a result, the amount of twisting of the cap-side contact portion 24 due to the rotation of the cap 20 can be reduced, and torque can be efficiently transmitted to the partition wall 12.

Examples of the material of the spout body 10 include polyethylene, and examples of the material of the cap 20 include, but are not limited to, polyethylene and polypropylene.

<Example>
The spout plugs according to Examples 1-1 and 1-2 and Comparative Example 1-1 were prepared, the opening torque was measured, and the presence or absence of residue in the cap of the partition wall after opening was evaluated.

(Example 1-1)
As Example 1-1, the spout plug 100 according to the first embodiment shown in FIGS. 1 and 2 was produced. The wall thickness of the thin portion 12a of the spout body 10 was 0.15 mm, and the diameter was 13 mm.

(Example 1-2)
As Example 1-2, a spout plug was produced, which differs from the spout plug 100 according to Example 1 in that the partition wall side engaging portion 15 and the cap side engaging portion 25 are not provided.

(Comparative Example 1-1)
As Comparative Example 1-1, the partition wall side contact portion is in a state where the spout plug 100 according to the first embodiment does not have an idle section S and the cap 20 is attached to the spout main body 10. A spout plug was produced which differs in that the contact surface 14a of 14 and the contact surface 24a of the cap side contact portion 24 are in contact with each other.

(Evaluation)
Ten spout plugs 100 according to Examples 1-1 and 1-2 and Comparative Example 1-1 were prepared, and the opening torque required for opening was measured and the partition wall remained after opening. Was evaluated. The evaluation results are shown in Table 1. As the "opening torque", the average value of the cap opening torque is shown. In addition, as "residual partition wall", the case where the partition wall remains in the cap after opening in all the spout plugs is indicated by "+", and the partition wall remains in the cap after opening in at least one spout plug. The case where there was no (the partition wall was removed from the cap) was indicated by "-".

Since the spout plug according to Examples 1-1 and 1-2 includes a free running section S, the resistance force caused by the frictional force generated by the close contact between the inner ring 27 and the cylinder portion 11 at the time of opening is a thin portion. It did not occur when 12a was broken. Therefore, it was confirmed that the opening torque was smaller than that of the spout plug according to Comparative Example 1-1 in which the idle section S was not provided.

Further, in the spout plugs according to Examples 1-1 and Comparative Example 1-1, since the partition wall side engaging portion 15 and the cap side engaging portion 25 engage with each other after opening, the partition wall 12 is inside the cap 20. It was confirmed that it remained in. Since the spout plug according to Example 1-2 does not include the partition wall side engaging portion 15 and the cap side engaging portion 25, the partition wall 12 could not remain in the cap 20 after opening.

[Second Embodiment]
Next, the spout plug 101 according to the second embodiment of the present invention will be described with reference to the drawings. FIG. 7 is a vertical cross-sectional view of the spout plug 101 according to the present embodiment in a state before the cap is opened, and FIG. 8 is an enlarged view of a portion E surrounded by a dotted line in FIG. The spout plug 101 is the spout plug 100 according to the first embodiment, further provided with a vibration suppressing portion 28 on the inner peripheral side of the inner ring 27. In the following, the differences between the spout plug 101 and the spout plug 100 will be mainly described. The same or corresponding configurations are designated by the same reference numerals and the description thereof will be omitted.

The vibration suppressing portion 28 is provided to prevent the vibration generated during ultrasonic welding from propagating to the thin-walled portion 12a and damaging the thin-walled portion 12a (pinholes are generated). As shown in FIGS. 7 and 8, the vibration suppressing portion 28 has a substantially cylindrical shape, and is formed so that one end is covered with the top surface portion 22 on the inner peripheral side of the inner ring 27. Further, the vibration suppressing portion 28 is formed so that the tip of the vibration suppressing portion 28 comes into contact with the surface of the partition wall 12 which is at least outside the thin portion 12a when the cap 20 is attached to the spout main body 10. As a result, the vibration propagated from the flange 17 at the time of ultrasonic welding can be suppressed, and a part of the vibration can be propagated (released) to the cap 20 via the vibration suppressing portion 28. Therefore, according to the spout plug 101, it is possible to reduce the vibration propagating to the thin-walled portion 12a and prevent the thin-walled portion 12a from being damaged by ultrasonic welding.

If the vibration during ultrasonic welding can be propagated to the cap 20, the tip of the vibration suppressing portion 28 does not have to be in contact with the surface of the partition wall 12, for example, 1 mm between the tip and the surface of the partition wall 12. They may be brought close to each other so as to have a gap (clearance) of the following degree. Further, chamfering or round chamfering (R) may be provided at the tip of the vibration suppressing portion 28. Further, if the vibration can be propagated to the cap 20, the tip of the vibration suppressing portion 28 does not have to be in contact with or close to the surface of the partition wall 12 over the entire circumference.

<Example>
The spout plugs according to Examples 2-1 and 2-2 were prepared, and the presence or absence of damage in the thin portion 12a when attached to the container body by ultrasonic welding was evaluated.

(Example 2-1)
As Example 2-1 the spout plug 101 according to the second embodiment shown in FIG. 7 was produced. The wall thickness of the thin portion 12a of the spout main body 10 was 0.1 mm, and the diameter was 13 mm.

(Example 2-2)
As Example 2-2, the spout plug 100 according to the first embodiment shown in FIGS. 1 and 2 was produced.

(Evaluation)
After producing 50 spout plugs according to Examples 2-1 and 2-2 and attaching them to the container body by ultrasonic welding, a part of the container body is provided with a spout so as to surround the welded portion. The cut and terepine penetrant was dropped near the welded portion, and after 24 hours, it was visually confirmed whether or not the thin portion 12a was damaged. A welding device having an output of 130 J was used for ultrasonic welding, and ultrasonic waves having a frequency of 30 kHz at 90% output were used for welding.

The spout plugs according to Example 2-1 were not damaged in all 50 pieces, but the spout plugs according to Example 2-2 were confirmed to be damaged in 4 out of 50 pieces. From this result, the spout plug 101 according to the present embodiment is subjected to ultrasonic welding as compared with the spout plug 100 according to the first embodiment even if the wall thickness of the thin portion 12a is 0.1 mm, which is relatively small. The effect of the vibration suppressing portion 28, which can suppress the damage of the thin-walled portion 12a, was confirmed. Therefore, the spout plug 101 according to the present embodiment can have a thinner wall thickness of the thin portion 12a than the spout plug 100 according to the first embodiment, and the force required for breaking can be reduced. The load on the user can be further reduced.

The present invention is useful for packaging containers and the like.

10 Faucet body 11 Cylindrical part 12 Partition wall 12a Thin-walled part 13 External screw 14 Partition wall side contact part 15 Partition side engagement part 16 Cylindrical part 17 Flange 20 Cap 21 Side wall 22 Top surface part 23 Internal screw 24 Cap side contact part 25 Cap Side engaging part 26 Cylindrical part 27 Inner ring 28 Vibration suppression part 100 Outlet plug CL Central axis S Free running section

Claims (5)

A cylindrical tubular portion on which an external screw is formed, a partition wall that closes the inside of the tubular portion, and a spout body having a flange that extends outward from one end of the tubular portion.
A cylindrical side wall on which an internal screw to be screwed with the external screw is formed, a cylindrical inner ring provided on the inner peripheral side of the side wall, and a top surface portion covering one end of the side wall and one end of the inner ring. A spout plug comprising a cap that covers the cylinder portion of the spout main body and is attached in a state where the external screw and the internal screw are screwed together.
The cap-side contact portion and the partition wall-side contact portion that contact the top surface portion and the partition wall with each other by rotating the cap by a predetermined angle in the direction of releasing the screw from the state where the cap is attached to the spout body. Are formed respectively,
The partition wall is formed with an annular thin-walled portion that surrounds the partition wall side contact portion and whose center overlaps with the central axis of the cylinder portion.
When the cap side contact portion and the partition wall side contact portion are in contact with each other and the cap is further rotated with a predetermined force in the direction of releasing the screwing, the predetermined force is applied to the cap side. The thin wall portion acts on the thin wall portion via the contact portion and the partition wall side contact portion to break the thin wall portion, and the partition wall can be separated from the tubular portion and opened.
The outer peripheral surface of the inner ring and the inner peripheral surface of the tubular portion are
From the state in which the cap is attached to the spout body to the rotation of the predetermined angle in the direction of releasing the screwing, the cap is in close contact over the entire circumference.
The close contact is released when the cap-side contact portion and the partition wall-side contact portion are engaged with each other.
Spout plug. The cap side contact portion and the partition wall side contact portion have
When the cap-side contact portion and the partition wall-side contact portion come into contact with each other, the cap and the partition wall are restricted from relatively moving so as to be separated in a direction along the central axis. Cap-side engaging portion and bulkhead-side engaging portion are formed, respectively.
The spout plug according to claim 1. The partition wall is provided so as to have a distance of 5 mm or more from the flange in the extending direction of the central axis.
The spout plug according to claim 1 or 2. One end of the cap is covered with the top surface portion on the inner peripheral side of the inner ring, and the tip of the cap is attached to the spout main body at least on the outer peripheral side of the thin wall portion. Further provided with a substantially cylindrical vibration suppressor that abuts or is in close proximity to the surface.
The spout plug according to any one of claims 1 to 3. A packaging container comprising the spout plug according to any one of claims 1 to 4.