JP2019034760A - Spout plug - Google Patents

Abstract

To provide a spout plug easy to open.SOLUTION: The spout plug consists of a plug body which has a partition wall blocking the cylindrical part on which an outer screw is formed and the inside of the cylindrical part and a cap which has a top surface part covering the cylindrical side wall on which an inner screw to screw on the outer screw is formed and one end of the side wall and is mounted on the plug body. On the top surface part and the partition wall are respectively formed with a cap side engagement part and a partition wall side engagement part that engage on each other in a state restricting the relative rotation around the central axis, and on the partition wall are formed with more than one spiral shaped thin wall parts that curve in the rotating direction of the cap when unscrewing the screw from inside toward outside and include the extending part and a circular thin wall part surrounding the spiral shape along the outer periphery.SELECTED DRAWING: Figure 1

Description

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

  2. Description of the Related Art As a packaging container for fluid contents such as liquids, powders or granules, those provided with a resin spout stopper are widely used. The spout stopper includes a plug main body including a cylindrical tube portion and a partition wall closing the inside thereof, and a cap that covers the plug main body. The partition wall is provided with a circular thin portion and a pull ring. When the cap is removed and the pull ring is pulled, the partition wall breaks along the thin wall portion and can be opened. Moreover, it can be resealed by putting a cap.

JP 2000-296865 A

  However, since such a spout plug has a relatively large pulling force required to break the thin wall portion of the partition wall, the load is high for a weak user, and the pull ring after opening is discarded. It takes time and there is room for improvement in convenience.

  This invention is made | formed in view of such a subject, and it aims at providing the spout stopper with easy opening.

  One aspect of the present invention for solving the above problems is that a cylindrical tube portion having an external screw formed therein, a plug body having a partition wall that closes the inside of the tube portion, and an internal screw that is screwed to the external screw are provided. A spout plug having a formed cylindrical side wall and a top surface portion covering one end of the side wall, and comprising a cap attached to the main body of the plug, the top surface portion and the partition wall being subjected to relative rotation around the central axis. A cap-side engaging portion and a partition-side engaging portion that are engaged with each other in a restricted state are formed, and the partition is curved in the direction of rotation of the cap when releasing the screw from the inside toward the outside. A spout stopper in which one or more spiral-shaped thin portions including a portion extending in a circular shape and a circular thin-wall portion surrounding the spiral shape along the outer periphery are formed.

  According to the present invention, the partition wall can be broken with a small force by the rotation of the cap, and the broken partition wall stays on the cap and does not need to be discarded.

The perspective view of the cap main body and cap which comprise the spout stopper which concerns on one Embodiment of this invention Sectional drawing of the spout stopper which concerns on one Embodiment of this invention, and bottom view of a plug main body The bottom view which shows the mode of opening of the spout stopper which concerns on one Embodiment of this invention The bottom view of the modification of the spout stopper concerning one embodiment of the present invention The bottom view of the modification of the spout stopper concerning one embodiment of the present invention The bottom view of the modification of the spout stopper concerning one embodiment of the present invention

(Embodiment)
A spout stopper according to an embodiment of the present invention will be described. FIG. 1 is a perspective view of a cap main body 10 and a cap 20 constituting a spout plug 100 according to the present embodiment. 2A and 2B are a cross-sectional view by a plane passing through the central axis of the spout stopper 100 and a bottom view of the plug body 10, respectively. The plug main body 10 includes a cylindrical tube portion 11 in which an external screw 13 is formed, and a partition wall 12 that closes the inside of the tube portion 11. The cap 20 has a cylindrical side wall 21 in which an internal screw 23 is formed, and a top surface portion 22 that covers one end of the side wall 21. The cap 20 and the plug body 10 are screwed together with an outer screw 13 and an inner screw 23 with the central axis as a rotation axis, and the inner ring 25 formed on the top surface portion 22 in the screwed state is an end of the cylinder portion 11. It touches the inner circumference.

  A cap side engagement portion 24 is formed on the top surface portion 22, and a partition wall side engagement portion 14 is formed on the partition wall 12. These are engaged with each other when the cap 20 is attached to the plug body 10. The cap side engaging part 24 and the partition wall side engaging part 14 have a cross-shaped recessed part and convex part as an example, and engage so as to restrict mutual relative rotation around the central axis. The cross shape is an example, and other structures may be used as long as the relative rotation can be sufficiently restricted. In addition, it is only necessary that the relative movement in the direction along the central axis can be regulated to such a degree that it has a certain degree of difficulty. The initial attachment of the cap 20 to the plug body 10 is performed by driving the cap 20 with a constant force in the direction of the central axis after the positioning, so that the inner screw 23 gets over the outer screw 13.

  The partition wall 12 is formed with a spiral thin portion 15 and a circular thin portion 16. In the illustrated example, these are formed on the opposite side of the surface of the partition wall 12 on which the partition wall side engaging portion 14 is provided, but may be formed on the surface on which the partition wall side engaging portion 14 is provided. For example, the spiral thin portion 15 extends in the outer peripheral direction from the vicinity of the position where the partition wall side engaging portion 14 is formed, and the circular thin portion 16 is provided near the outer periphery and surrounds the spiral thin portion 15. Yes. The direction of the spiral of the spiral-shaped thin wall portion 15 is the same as the direction of rotation of the cap 20 when the cap 20 and the plug body 10 are released from the screwed state. That is, in the example shown in FIG. 2B, the screwing release direction of the cap 20 is clockwise toward the paper surface, and the spiral is also curved clockwise from the inside toward the paper surface. Stretch.

  The spiral-shaped thin-walled portion 15 has protective ribs 17 that are thicker than the other positions of the partition wall 12 in the periphery of the end portion on the side close to the center portion of the partition wall 12 and in the outer peripheral region in a range along the predetermined length from the end portion. May be formed.

  (A), (b) of FIG. 3 is a bottom view of the stopper main body 10 showing a state of opening. When the cap 20 is rotated in the clockwise direction, which is the screw release direction, torque is transmitted from the cap side engaging portion 24 to the partition side engaging portion 14. Even if the torque is relatively small, the portion near the center of the spiral-shaped thin portion 15 has a small distance from the rotation axis, so that the stress acts greatly. As shown in FIG. The fracture line 18 is generated along the spiral thin portion 15. When the protective rib 17 is formed, it is possible to reduce the possibility that the break line 18 travels in a direction away from the spiral thin portion 15.

  If the rotation of the cap 20 is continued, a force acts on the partition wall 12 in the direction of separating the spiral thin portion 15 due to the rotation and the movement of the cap 20 along the rotation in the direction of the rotation axis. ), The fracture proceeds and reaches the circular thin portion 16. When the rotation of the cap 20 further proceeds, the entire circumference of the circular thin portion 16 is broken, and the partition wall 12 is detached from the plug body 10 along with the cap 20 and the opening is completed.

  Thus, since the opening is completed when the cap 20 is rotated and removed, there is no need to separately remove the partition wall 12 as in the method of opening with the pull ring. In addition, the cap 20 is easier to pinch and give torque than the pull ring, and the breakage of the thin wall portion gradually progresses as the rotation progresses, so if breakage occurs once in the center, this is the trigger, Thereafter, the breakage can be advanced with a relatively small force to complete the opening. The detached partition wall 12 remains in the cap 20 because the partition wall side engaging portion 14 is engaged with the cap side engaging portion 24 with a certain degree of difficulty in coming off, but the cap 20 is opened again for resealing. Even if it is screwed onto the plug body 10, it does not cause any serious trouble, and it is not necessary to remove and discard it. As described above, the spout plug 100 according to the present embodiment can be easily opened without load and labor as compared with the method of opening with the pull ring.

  In addition, when the direction of the spiral of the spiral-shaped thin portion 15 is set to be opposite to the direction of rotation of the cap 20 when releasing the screwed state of the cap 20 and the plug body 10, the force pulls the thin portion apart. It is difficult to act in the direction, and the force required for breaking may be increased.

(Modification)
4A and 4B are cross-sectional views of the plug body 30 and the plug body 40 according to a modification of the plug body 10 by a plane passing through the central axis. In the plug body 30, the partition wall 12 has a tapered shape that is convex toward the side to which the cap is attached. In the plug body 40, the partition wall 12 has a dome shape that is convex toward the side on which the cap is attached. If it does in this way, the pulling force which arises when a cap will leave | separate from a cap main body as screwing will become easy to act in the direction which pulls apart the spiral-shaped thin part 15. FIG. Therefore, the spiral-shaped thin portion 15 is easily broken, and the amount by which the partition wall 12 is stretched before breaking is reduced. Thereby, since the deformation amount of the partition 12 at the time of detachment from the plug main body is reduced, it can be more reliably prevented from being hindered at the time of resealing when remaining in the cap 20.

  In FIG. 5, the bottom view of the plug main body 50 which concerns on the other modification of the plug main body 10 is shown. The plug body 50 is provided with two sets of spiral-shaped thin portions 15 and protective ribs 17. Thus, the number of spiral-shaped thin portions 15 is not limited as long as the cap can be broken before it is detached from the cap body. In addition, by appropriately designing the number of turns of the spiral-shaped thin portion 15 and the number of threads of the outer screw 13 and the inner screw 23, it is possible to suitably select the torque and rotation amount required for opening. .

  6A and 6B show a cross-sectional view and a bottom view of a plug main body 60 according to still another modified example of the plug main body 10 by a plane passing through the central axis. The plug body 60 has a portion where the thickness near the center is larger than the thickness farther than the center, with the spiral-shaped thin portion 15 as a boundary. In the example shown in FIG. 6, the thickness of the region 1 including the central portion is larger than the thickness of the region 3 straddling the spiral thin portion 15. In the region 2 in the direction in which the protective ribs 17 are formed when viewed from the center of the partition wall 12, the inclined portion gradually increases in thickness counterclockwise from the thickness of the region 3 to the thickness of the region 1 toward the paper surface. Is provided. In this way, by changing the thickness of the partition wall 12 across the spiral-shaped thin portion 15, a difference is provided in the difficulty of deformation on both sides of the spiral-shaped thin portion 15, and stress is applied to the spiral-shaped thin portion 15. Can be easily concentrated and more easily broken.

  Embodiments of the present invention are not limited to the above-described embodiments and modifications, and for example, the features of the modifications may be combined as appropriate.

Example 1
The spout stopper 100 according to the embodiment of the present invention shown in FIGS. The radius of the circular thin portion 16 was 8 mm, and the spiral thin portion 15 was provided so as to extend from the center of the partition wall 12 to the outer periphery from a position 4 mm. The plug body 10 is made of low-density polyethylene having an elastic modulus of 140 MPa, and the thickness of the circular thin portion 16 and the spiral thin portion 15 is 0.2 mm.

(Comparative Example 1)
A spout stopper was produced in the same manner as in Example 1 except that the spiral thin portion was not provided.

(Comparative Example 2)
A spout stopper was prepared in the same manner as in Example 1 except that the spiral thin portion was not provided and the radius of the circular thin portion was 4 mm.

(Evaluation)
The opening torque of the spout stopper according to Example 1 and Comparative Examples 1 and 2 was measured. Moreover, the discharge amount at the time of using for the packaging container which uses a liquid as the content was measured. The results are shown in Table 1. In both Example 1 and Comparative Examples 1 and 2, the opening itself was possible. Moreover, the partition remaining in the cap after opening the bottle did not hinder re-sealing.

  In the case of Example 1 and Comparative Example 2, the torque required for opening the plug could be reduced because the thin portion was provided in the portion close to the center of the partition wall. In the case of the comparative example 1, since the thin part was not provided in the part close | similar to the center of a partition, it became a larger value than Example 1 and the comparative example 2. FIG.

  As for the discharge amount, in Example 1 and Comparative Example 1, since a large opening having a radius of 8 mm can be provided by opening the plug, a sufficient discharge amount equivalent to the conventional pull ring method was obtained. In the case of Comparative Example 2, only a small opening with a radius of 4 mm was provided by opening the plug, and only a discharge amount smaller than that of the conventional pull ring method was obtained.

  In Example 1, since the spiral-shaped thin part and the circular thin part along the outer periphery were provided, both a small opening torque and a sufficient discharge amount were compatible, and therefore, the overall evaluation was “Good (good)”. In Comparative Examples 1 and 2, which were not compatible, the overall evaluation was “x (defect)”.

  As described above, according to the present invention, it is possible to provide a spout stopper with less load and trouble at the time of opening without deteriorating the discharge amount than the conventional product.

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

1, 2, 3 Partition area 10, 30, 40, 50, 60 Plug body 11 Tube portion 12 Partition 13 External screw 14 Partition-side engaging portion 15 Spiral thin portion 16 Circular thin portion 17 Protective rib 18 Break line 20 Cap 21 Side wall 22 Top surface portion 23 Inner screw 24 Cap side engaging portion 25 Inner ring 100 Outlet plug

Claims (4)

A plug body having a cylindrical tube portion formed with an external screw and a partition wall for closing the inside of the tube portion;
A spout plug comprising a cylindrical side wall formed with an inner screw to be screwed with the outer screw and a top surface portion covering one end of the side wall, and a cap attached to the plug body,
The top surface portion and the partition wall are respectively formed with a cap side engagement portion and a partition wall side engagement portion that engage with each other in a state in which relative rotation around a central axis is restricted.
The partition includes the one or more spiral-shaped thin portions including a portion extending and curved in the direction of rotation of the cap when releasing the screwing from the inside to the outside, and along the outer periphery. A spout stopper in which a circular thin portion surrounding the spiral shape is formed.   The partition wall has a thickness in the periphery of the end portion on the side close to the center portion of the spiral thin portion and in the outer peripheral region along the spiral thin portion having a predetermined length from the end portion. The spout stopper according to claim 1, wherein a protective rib is formed by making it thicker than the other position of the partition wall.   The spout stopper according to claim 1 or 2, wherein the partition wall has a tapered shape or a dome shape that is convex toward a side on which the cap is attached.   The spout according to any one of claims 1 to 3, wherein the partition wall has a portion where the thickness near the center is larger than the thickness farther than the center, with the spiral thin portion as a boundary. plug.

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