JP2018188213A - Plug - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a plug by which sterilization liquid such as aseptic sterilization is hardly mixed, and leakage hardly occurs even if a fitting part is dropped and deformed.SOLUTION: A plug (1) comprising a cylindrical spouting cylinder (22), a cap body (2) capable of opening by breaking a closing plate (23) provided inside the lower end of a pouring cylinder and around which a flange (21) capable of fusing with the container body is provided at the lower outer circumference of the pouring cylinder and a hinged cap (3) fittable to a pouring cylinder of the cap body via a hinge has an inner ring (33) on the inner surface of the hinged cap, the inner ring is in contact with the inner side of the periphery of the tip of the spouting cylinder, and the tip end of the inner wall of the hinged cap comes into contact with the outer peripheral edge of the tip of the spouting cylinder in such a manner as to be sealable at least in two places.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a plug used for a liquid paper container or the like, and more particularly to a plug having a hinge cap that can be resealed with the hinge cap after opening the plug.

The liquid paper container used mainly for liquid contents such as milk and juice is a gable-top liquid with a gabled roof shape and a cylinder with a cuboid body for ease of use during filling and use. Many paper containers are used.
A hole is opened in the slope of the gable top, and a plug provided with a fusion flange is fused to the inner surface of the hole.
Of course, it is also possible to fuse a plug having a hole on the upper surface of the flat top and provided with a flange for fusion to the inner surface of the hole.
In particular, in order to prevent leakage during transportation, these plugs are provided with a closed portion surrounded by a weak line so as not to leak outside until just before use.
And after breaking the surrounding line of weakness to remove the closing part and opening it, a screw cap that is screwed together and a hinge cap that can be opened and closed by turning the hinge around the shaft covered and closed the opening . However, screw caps that are screwed together are easy to get dirty by dropping, and there is a great risk of losing them. Further, the hinge cap has a problem that it is difficult to seal and deterioration due to oxygen or the like cannot be reliably suppressed.
In particular, recently, there is an increasing expectation for using oxygen peroxide or the like for sterilization and the like as an aseptic container. At the time of sterilization with oxygen peroxide or the like, the sterilizing liquid may be mixed with the contents, or may stay or remain in a part of the container, and may be mixed into the contents at the time of opening.

  For example, in Patent Document 1, the lid portion is a one-piece plug that is openably and closably connected via a hinge, and the plug body is provided with a welding flange having a circular outer periphery on the outer peripheral surface of the lower end of the annular pedestal. It has proposed a spigot provided with a pour tube that is opened with a pull ring.

  However, at the fitting part between the tip of the dispensing cylinder and the lid, the occlusal ring and the inner sealing ring inside the lid only abut, so the peroxidation remaining after sterilization with hydrogen peroxide etc. Bactericidal solution such as hydrogen water tends to remain. For this reason, when the sealing plate is opened, if the sterilizing liquid is mixed into the contents or falls after the lid is opened and closed, there is a possibility that the leakage may easily occur.

  In Patent Document 2, a one-piece plug with a lid connected to the back of the plug body by a belt-wound hinge, the plug body has a flange at the lower end of the outer periphery, and an inclination angle of downward opening of the inner peripheral surface is 75 °. A pour cylinder with an occlusal ring at the upper end of the outer periphery is erected on the pedestal ring, the inner lower part of the pour cylinder is sealed with a sealing plate, and an annular cut is provided at the planned opening position on the top surface of the sealing plate. A thin-walled weak line is formed, an arrow-shaped support column is erected in the vicinity of the back side of the annular thin-walled weak line, a V-shaped connection is provided at the end of the support column, and a front upward pull ring is provided. A plug 1 is proposed in which an opening / closing knob is provided on the outer periphery of the lower end of the front peripheral wall portion, an inner sealing ring is provided vertically on the lower surface of the top plate, and an occlusal ring is provided on the inner peripheral surface of the lower end of the peripheral wall portion.

The basic structure of such a spigot 1 is shown in FIGS. 8A and 8B. The cap peripheral protrusion 34 of the hinge cap 3 and the annular protrusion 220 of the dispensing tube 22 are engaged. The inner ring 33 provided on the inner surface of the hinge cap 3 is in intimate contact with the inner peripheral surface of the tip portion of the dispensing cylinder. The annular protrusion 220 on the outside of the dispensing cylinder is a simple annular protrusion, and is in contact with only one portion of the annular protrusion 220 of the dispensing cylinder. For this reason, if the sterilizing agent remains in the vicinity of the lower end of the cap circumferential protrusion 34, there is a possibility of mixing at the time of dispensing.
Further, when the annular protrusion 220 has a scratch or the like, the sterilizing liquid easily flows between the tip of the pouring cylinder and the cap side wall 32, and the risk of mixing the sterilizing liquid at the time of pouring increases. .
In this spigot 1, the cap circumferential protrusion 34 and the annular protrusion 220 are engaged, and the inner ring provided on the inner surface of the hinge cap is in intimate contact with the inner peripheral surface of the tip portion of the dispensing cylinder, so that it can be normally sealed, but dropped, etc. When the impact of (2) was applied, there was a problem that the fitting part was deformed by the impact and leaked.

Further, when the plug is opened, the pull ring 232 formed integrally with the end of the closing plate 23 is pulled up, and the fragile portion 231 surrounding the closing plate 23 is broken and opened. Conventionally, as shown in the plan view of FIG. 9A, the fragile portion 231 is generally circular, and a support column 233 is provided at one end of the closing plate 23, and a pull ring 232 is formed via the support column 233. there were. FIG. 9-2 shows a cross-sectional view cut along the column 233 so that the fragile portion 231 has a clear shape.
In the weak portion 231 shape, a large force is required at the time of the first opening for pulling up the pull ring 232 in order to open, and there is a problem that it is difficult for a person such as a child or an elderly person who does not have a large force to open.
Also, even when opening is started, at the final stage of opening and cutting off the closing plate 23, the opposite side of the column 233 from which the closing plate 23 is cut out is made of a large curvature, so the greatest force is required. There was a problem that it was difficult to open.

Japanese Patent No. 4479415 Japanese Patent No. 4525127

  Accordingly, it is an object of the present invention to obtain a plug that is difficult to mix with a sterilizing liquid such as aseptic sterilization and that is difficult to soak up and leak due to deformation of the fitting portion even when dropped.

The plug of the present invention is
A cylindrical pouring cylinder, a cap body that can be opened by breaking a closure plate provided on the inner side of the lower end of the pouring cylinder, a flange that can be fused to the container main body at the lower end of the outer circumference of the pouring cylinder, In a spigot comprising a hinge cap that fits into a dispensing cylinder of the cap body via a hinge,
An inner ring on the inner surface of the hinge cap;
The inner ring comes into contact with the inner periphery of the tip of the dispensing cylinder,
The mouth cap is characterized in that the tip of the inner wall of the hinge cap can be sealed by abutting at least two locations on the outer periphery of the tip of the dispensing tube.

  Since the plug of the present invention abuts at the inside of the dispensing tube tip and at the two outside of the tip, even if a gap occurs due to a drop impact at one location, Seal and do not leak. Further, even when the sterilizing liquid remains around the container due to aseptic sterilization or the like, the contents can be prevented from being mixed with the sterilizing liquid.

It is sectional drawing immediately after shape | molding a stopper with the stopper in the example of 1st Embodiment of this invention, and sectional drawing which shows the state which closed the hinge cap of the stopper. The shape of the pull ring in the first embodiment of the present invention and the plug in the second embodiment in which sinking is prevented, showing a cross-sectional view immediately after forming the plug and a state in which the hinge cap of the plug is closed. It is sectional drawing. It is sectional drawing immediately after shape | molding the stopper with the stopper in the example of 3rd Embodiment of this invention, and sectional drawing which shows the state which closed the hinge cap of the stopper. It is sectional drawing immediately after shape | molding a stopper with the stopper in 4th Example of this invention, and sectional drawing which shows the state which closed the hinge cap of the stopper. Sectional drawing immediately after shape | molding a stopper with the stopper in 5th Embodiment which prevented the sinking of the pull ring in 3rd Embodiment of this invention, and sectional drawing which shows the state which closed the hinge cap of the stopper It is. It is the top view of the state in which the hinge cap just after shaping | molding was opened with the plug in the example of 6th Embodiment of this invention, and the cross-sectional view cut | disconnected by the pull ring support | pillar part (AA surface of FIGS. 1-1). In the state in which the pull ring column part (AA plane in FIG. 1-1) in the mouth plug in the sixth embodiment of the present invention is cut, and in the state where the pull ring is pulled up to open the closing plate, the part b is a fulcrum. They are the longitudinal cross-sectional view cut | disconnected by the BB surface of the center of a support | pillar which shows the process of tearing a part in FIG. It is sectional drawing immediately after shape | molding a stopper with the stopper in the prior art example, and sectional drawing which shows the state which closed the hinge cap of the stopper. It is the top view of the state in which the hinge cap immediately after shaping | molding in the plug of a conventional product was opened, and the cross-sectional view cut | disconnected by the pull ring support | pillar part (CC plane of FIGS. 8-1).

Hereinafter, embodiments of the plug of the present invention will be described in detail with reference to the drawings.
As shown in the first embodiment of FIG. 1, the spout of the present invention is provided with a cylindrical pouring tube, and a flange that can be fused to the container body at the lower end of the outer periphery of the pouring tube. It is a spigot 1 comprising a cap body that can be opened by breaking a closing plate provided inside the lower end of the cylinder, and a hinge cap that fits into an extraction cylinder of the cap body via a hinge.
In the container using the plug 1, the opening 51 having a diameter slightly larger than the inner diameter of the flange is provided in the sheet serving as the container main body 5, and the plug 1 is projected so as to protrude from the inside thereof, and the flange 21 and the sheet It is manufactured by fusing the periphery of the opening 51.

The spigot 1 of the present invention is composed of a cap body 2 and a hinge cap 3.
The cap body 2 has a dispensing cylinder 22 in the center. A flange 21 that is fused to a sheet that becomes the container body 5 via a base 211 is provided at the outer lower end of the dispensing tube 22.
Further, a closing plate 23 is provided in the vicinity of the inner bottom end of the dispensing tube 22.
The closing plate 23 is surrounded by a fragile portion 231, and has a pull ring 232 at one end of the closing plate 23 via a support column 233. Although the closing plate 23 separates the inside and the outside of the container, the opening is made possible by breaking the fragile portion 231 and removing the closing plate 23 so as to be dispensed.
A locking claw 24 shown in the figure may be provided above the flange 21 of the stopper 1 so that the stopper can be temporarily fixed to the container body 5 before being fused.

A hinge cap 3 is provided at one end away from the upper end of the dispensing cylinder via a hinge 4.
The hinge cap 3 includes a cap top plate 31 and cap side walls 32 extending downward from the periphery of the top plate. Further, an inner ring 33 is provided downward from the vicinity of the inner peripheral edge of the top plate 31.
In addition, a cap circumferential protrusion 34 is provided at the inner end of the cap side wall 32.

FIG. 1-2 is a sectional view showing a state in which the hinge cap 3 is fitted to the cap body 2 by rotating the hinge 4 as an axis, and is a partially enlarged view of the fitting portion at the tip of the dispensing cylinder. It was attached.
The inner ring 33 of the hinge cap 3 is in contact with the inner peripheral edge of the tip of the dispensing tube 22.
The outer peripheral edge of the tip of the dispensing tube 22 has an annular protrusion 220. The annular protrusion 220 has a fitting structure composed of a double annular protrusion having a first annular protrusion 221 and a second annular protrusion 222 on the lower side and the upper side, respectively.
By such a double annular protrusion, the annular protrusion 220 abuts at two locations of the cap circumferential protrusion 34 and the cap side wall 32 at the outer peripheral edge of the dispensing tube.
For this reason, even if some force is applied to the plug and there is a slight deformation, any of the contact portions does not contact and cause liquid leakage, and the sealing performance is high.
In addition, when sterilizing by spraying a sterilizing solution such as hydrogen peroxide water in a mist, it tends to remain near the lower end of the cap circumferential projection 34, but the second annular projection 222 allows the sterilizing solution to be doubled. Since it can be scraped off, there is little risk of contamination during pouring.

FIGS. 2-1 and 2-2 show the shape of the pull ring 232 of the plug 1 of the first embodiment and the second embodiment in which the sinking is prevented. FIG. 2-1 is immediately after the plug is molded. FIG. 2-2 is a sectional view showing a state in which the hinge cap of the spigot is closed.
The pull ring 232 is designed to have a constant width, and a protrusion 234 is provided at the lower end of the pull ring 232 on the tip side.
Protrusions 234 for preventing sinking are provided on the left and right sides between the support 233 and the tip of the pull ring 232.
When the hinge cap 3 is closed, the pull ring 232 is pushed from above and pushed into the dispensing tube 22. At this time, even if the pull ring 232 is pushed deeper than necessary, the tip of the protrusion 234 is in contact with the closing plate, so that it does not go deeper than a certain depth.
For this reason, when the hinge cap is opened, the pull ring immediately rises and is easy to open.
Further, when the fingertip or the like is inserted into the pull ring and is picked when opening in use, the pull ring is prevented from being pushed down in a manner that follows the fingertip or the like, thereby making it difficult for the pull ring to be picked. The clearance between the protrusion and the closing plate is preferably 1 mm or more and 2 mm or less, and preferably 1.5 mm or less in consideration of prevention of pull-down sinking and ease of picking.

FIGS. 3-1 and FIGS. 3-2 are examples in which the shape of the annular protrusion 220 at the periphery of the tip of the extraction tube is a slightly narrow protrusion in the plug 1 of the third embodiment.
Since the cap side wall 32 is inclined, the annular protrusion 220 has an upper end in contact with the inclined surface of the inclined cap side wall 32, and a lower end in contact with the cap circumferential protrusion 34. Abuts at two locations.
Of course, the inner ring 33 is in contact with the inside of the tip of the dispensing cylinder, and the tip of the dispensing cylinder 22 is supported from the inside, so that the contact of the outside of the tip of the dispensing cylinder 22 is reliably supported.
For this reason, even if the container is dropped or an impact is applied, even if the sterilizing liquid remains at the tip of the cap side wall 32, the container does not enter the inside of the dispensing cylinder 22.

FIGS. 4-1 and FIGS. 4-2 are the stoppers 1 of 4th Embodiment, The shape of the annular protrusion 220 of the extraction pipe | tube front-end | tip periphery is a protrusion in which the cross section inclined the ellipse. In this example, a cap circumferential projection 341, which is in contact with the upper side of the annular projection 220, and a cap circumferential projection 34, which is in contact with the lower side of the annular projection, are provided outside the annular projection 220.
Since the inner ring 33 is in contact with the inside of the annular protrusion 220 and is difficult to escape inside, the liquid can be reliably stopped.

FIGS. 5-1 and 5-2 show a fifth embodiment in which the pull ring 232 is prevented from sinking by improving the plug 1 of the third embodiment. FIG. FIG. 5-2 is a sectional view showing a state in which the hinge cap of the spigot is closed.
Protrusions 234 for preventing sinking are provided on the left and right sides between the support 233 and the tip of the pull ring 232.
When the hinge cap 3 is closed, the pull ring 232 is pushed from above and pushed into the dispensing tube 22. At this time, even if the pull ring 232 is pushed deeper than necessary, the tip of the protrusion 234 is in contact with the closing plate, so that it does not go deeper than a certain depth.
For this reason, when the hinge cap is opened, the pull ring immediately rises and is easy to open.
Further, when the fingertip or the like is inserted into the pull ring and is picked when opening in use, the pull ring is prevented from being pushed down in a manner that follows the fingertip or the like, thereby making it difficult for the pull ring to be picked. The clearance between the protrusion and the closing plate is preferably 1 mm or more and 2 mm or less, and preferably 1.5 mm or less in consideration of prevention of pull-down sinking and ease of picking.

FIG. 6 shows a sixth embodiment in which the fragile portion 231 surrounding the closing plate 23 is more easily opened by the spigot 1 of the present invention.
FIG. 6A is a plan view of the mouth plug 1 of the present invention in a state in which the hinge cap 3 is opened, and FIG. 6B is a cross-sectional view cut in the middle of the column 233 that supports the pull ring 232.
In order to break and open the fragile portion 231 around the closing plate 23, a large force is required, and there has been a problem that it is difficult for a person such as a child or an elderly person who cannot exert a large force to open.
When a large force is required, there may be a problem that the column 233 connecting the closing plate 23 and the pull ring 232 is torn off.
In order to easily break the fragile portion 231 around the closing plate 23 and make it easy to open the opening, the opening portion of the opening has a reduced tearing force by providing an angle to the fragile portion 231 around the column 233 that fixes the pull ring. It is preferable that It is preferable that the angle of the fragile portion 231 around the support column 233 is at most 120 degrees or less.
Moreover, it is preferable to provide a small curved portion of R at the tip of the opening start portion. R at the tip of the starting portion is preferably a curve having a radius of 2 mm or less, preferably a radius of 1 to 0.5 mm.

FIG. 7 is a cross-sectional view cut at the pull ring column portion (A-A plane in FIG. 1-1) in the plug in the sixth embodiment of the present invention, and in the state where the pull plate is pulled up to open the closing plate. It is the longitudinal cross-sectional view cut | disconnected by the BB surface of the center of a support | pillar which shows the process of tearing the convex a part toward outward with the concave b part facing outward as a fulcrum, and its enlarged view.
When the pull ring 232 is pulled up, first, the fragile portion 231 near the support column 233 connected to the pull ring 232 is broken. Further, when pulling up the pull ring 232 and the tip of the fragile portion that has been broken reaches the portion b, as shown in the enlarged view of FIG. Strengthened to several tens of times stronger force, it becomes the force to tear the a part. For this reason, the portion a is broken with a small force, and only the left and right portions b serving as fulcrums are connected to each other. Therefore, when the pull ring 232 is continuously pulled up, the portion can be easily opened.
As shown in FIG. 9, if the radius R remains large, the maximum force is required at the final position for cutting, and it was difficult to cut.

Furthermore, as shown to FIGS. 7-1, the pull ring 232 opposite edge part becomes a spout direction. By having a convex R-shaped part in this direction and a concave R-shaped part on both sides of the convex R-shaped part, the contents in the convex R-shaped part even if the tilting direction of the container as the pouring direction is slightly shifted Objects are concentrated and are poured out from the convex R-shaped part. The angle of deviation between the convex R-shaped part and the concave R-shaped part may be adjusted to the maximum position expected to be shifted.
The radius of the convex R-shaped portion or the concave R-shaped portion depends on the size of the spout, the viscosity of the contents, the capacity and shape of the container, etc., but a radius of 1 to 5 mm is preferable.

The material used for the plug of the present invention is preferably linear low density polyethylene or low density polyethylene, but medium density polyethylene, high density polyethylene, polypropylene, ethylene / propylene random copolymer, ethylene / propylene block copolymer. , Etc. may be used.
And, using these, the manufacture of the plug can be mass-produced with a general injection molding machine using an injection mold.

The material used for the container body of the present invention may be a sheet or film of any configuration as long as it has a sealant layer that can be fused with a stopper on the inner surface and has a content protection performance. It doesn't matter.
For example, from the outside
Polyethylene / paper / polyethylene,
Polyethylene / paper / polyethylene / aluminum foil / polyethylene,
Polyethylene terephthalate / polyethylene,
Inorganic oxide-deposited polyethylene terephthalate / polyethylene / paper / polyethylene,
Polyethylene / paper / polyethylene / ethylene vinyl acetate copolymer saponified product / polyethylene, polyethylene terephthalate / polyethylene / adhesive resin / polyamide / adhesive resin / polyethylene,
Polyethylene terephthalate / polyamide / adhesive resin / polyethylene / aluminum foil / polyethylene,
A general configuration such as
When paper or metal foil is used for the intermediate layer, it is preferable that the sheet end face is securely edge protected by a skive hemming process or edge tape application.
These films and sheets can be bonded together using a machine such as ordinary dry lamination or extruder lamination, or can be produced using a multilayer inflation machine or the like.

The plug of the present invention is as described above, and when it is used in a container that performs aseptic sterilization after filling the contents, even if a sterilizing solution such as hydrogen peroxide used for aseptic sterilization remains around the container, it is sterilized. Problems such as liquid mixing into the contents are unlikely to occur.
Even if the closure plate of the spigot is broken and opened, the spout and the hinge cap can be double-fitted and sealed, so even if there is some deformation of the container or vibration such as transportation, the contents Problems such as leakage of items are unlikely to occur. Moreover, since it is merely a change in shape, it can be manufactured with conventional equipment and can be supplied at low cost without changing productivity.
Furthermore, by changing the shape of the closing plate, it is easy to open, and even if the angle of inclination of the container is slightly deviated, the merit of the present invention is great.

1 ............ Cap 2 ...... Cap body 21 ...... Flange 211 ...... Base 22 ...... Extraction tube 220... Annular protrusion 221... First annular protrusion 222... Second annular protrusion 23. 232 ... Pull ring 233 ... Pole 234 ... Projection 24 ... Locking claw 3 ... Hinge cap 31 ... ... Cap top plate 32 ... Cap side wall 33 ... Inner ring 34 ... Cap circumferential protrusion 341 ... Cap circumferential Engagement protrusion 4 ... Hinge 5 ... Container body 51 ... Opening

Claims (5)

A cylindrical pouring cylinder, a cap body that can be opened by breaking a closure plate provided on the inner side of the lower end of the pouring cylinder, a flange that can be fused to the container main body at the lower end of the outer circumference of the pouring cylinder, In a spigot comprising a hinge cap that fits into a dispensing cylinder of the cap body via a hinge,
An inner ring on the inner surface of the hinge cap;
The inner ring comes into contact with the inner periphery of the tip of the dispensing cylinder,
A spigot characterized in that the inner wall tip of the hinge cap can be sealed by abutting at least two places on the outer peripheral edge of the dispensing tube tip.   The cap according to claim 1, further comprising a cap-shaped protrusion on the inner end of the inner wall of the hinge cap.   The spigot according to claim 1 or 2, further comprising an annular protrusion on the outer periphery of the tip of the spout.   The spigot according to claim 3, wherein the annular projection provided on the outer periphery of the tip of the spout is composed of a first annular projection and a second annular projection. The closure plate is located on the bottom surface of the spout, and the closure plate is surrounded by a fragile portion that can be broken,
Has a pull ring through a support post at one end of the closure plate,
The mouth plug according to any one of claims 1 to 4, wherein the fragile part has a convex R-shaped part at the end opposite to the pull ring and a concave R-shaped part on both sides of the convex R-shaped part.

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