JP2012020773A - Apparatus for opening and resealing paper container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technology for opening and resealing a paper container with a low-cost simple configuration.SOLUTION: A circularity 5 to be opened is formed at the top surface 2 of a paper container body 1a. An opening and resealing apparatus 6 is attached by covering the circularity 5 to be opened. A cylindrical spout 10 concentric with the circularity 5 to be opened is formed in the body 7 of the opening and resealing apparatus 6 through a top face 8 and a bottom face 9. An insertion plug 11 for opening and resealing the circularity 5 to be opened is detachably held in a horizontal state in a holding part 12 formed in the body 7. The insertion plug 11 is composed of an insertion part 11a for opening and a grip part 11b for turning and pushing the insertion part 11a by a finger. The tip 11c of the insertion part 11a has an inclination α about 45 degrees for easy opening. A protrusion 11d and a recess 10a are formed in the insertion plug 11 and the spout 10 so that the insertion plug 11 is stably fixed to the spout 10 while the insertion plug 11 is inserted in the spout 10.

Description

The present invention relates to an opening and closing device that is attached to a paper container filled with liquid food, and more particularly to an inexpensive opening and closing device that can open and re-seal liquid food by opening the paper container.

Conventionally, a large paper container whose content liquid exceeds approximately 1 liter has been used up once it has been opened, or it has been necessary to transfer the content liquid to another container. The contents described in Patent Document 1 are known as conventional techniques relating to a paper container opening and closing stopper for solving this problem. As shown in FIG. 11, the opening and closing device 21 has a base portion 25 bonded along the peripheral edge portion of the opening portion 22 </ b> A of the top surface 22 of the paper container closed by the sealing film 24. The retainer 26 is internally screwed, and the screw cap 27 is externally screwed onto the upper portion of the retainer 26.

At the lower end of the retainer 26, a sharp end portion 26C for breaking through the sealing film 24 is formed, and the retainer 26 and the screw cap 27 are spot-welded at the welded portion 28. When the screw cap 27 is rotated in the direction E in which the screw cap 27 is removed, the cap 27 and the retainer 26 are united and lowered in the base portion 25 to break the sealing film 24, and the welded portion 28 is broken to easily remove the cap 27. The paper container can be recapped with the cap 27.

Japanese Patent Application Laid-Open No. 11-349024

However, this unsealing device has a problem that the screwing structure is complicated and the cost is high. Therefore, the present invention has been made in view of the problems of the prior art, and an object of the present invention is to provide a paper container opening / reopening device that can be easily opened and reopened with a simple structure and is low in cost. .

The invention of claim 1 is a paper container opening and re-sealing device provided in a paper container body formed by bending a paper base material to form a top surface, a bottom surface and a plurality of side surfaces, wherein the opening and re-sealing device is the top material. It comprises a main body portion that covers the planned opening portion for pouring the content liquid formed on the surface and is fixed to the top surface, and an insertion plug that opens and replugs the planned opening portion. The outer edge of the main body is provided with a holding portion for detachably holding the insertion plug, while the main body is concentric with the planned opening and a liquid outlet is inserted into the insertion plug. It is also characterized by being formed as a mouth.

A second aspect of the present invention is the paper container opening and closing device according to the first aspect, wherein the main body portion is provided with a cover that covers the spout.

The invention of claim 3 is the opening / reopening device for a paper container according to claim 1 or 2, wherein the insertion plug is inserted into the spout and the planned opening portion is opened. The spout and the plug are provided with annular recesses and protrusions that engage with each other.

According to a fourth aspect of the present invention, there is provided the paper container opening and re-sealing device according to the first or second aspect, wherein the spout and the insertion plug are screwed together.

According to the first aspect of the present invention, the unsealing and re-sealing device includes a main body portion that covers the planned opening portion for dispensing the content liquid formed on the top surface and is fixed to the top surface, and the planned opening portion. It consists of a plug to be opened and re-plugged. Here, a holding portion for detachably holding the insertion plug is provided on an outer edge portion of the main body portion, while a content liquid outlet is concentric with the planned opening portion on the main body portion. It is also formed as a slot. Thus, since the opening and closing device can be easily manufactured with a simple structure, the manufacturing cost of the opening and closing device can be reduced.

Since the plug is housed in the holding portion at the outer edge of the main body, damage due to external force during transport of the paper container can be prevented. And since the cylindrical spout which is concentric with the planned opening portion and also serves as the insertion port of the insertion plug is formed in the main body portion, the planned opening can be performed simply by inserting the insertion plug into the spout. The part can be opened easily and easily, and the liquid content can be smoothly poured out from the spout.

According to invention of Claim 2, since the cover which covers the said spout is provided in the said main-body part, since dust etc. do not adhere in a spout during the unused period of the said opening re-plugging apparatus, it mixes in a content liquid. Hygiene can be maintained because it can be prevented.

According to the invention of claim 3, the concave portion and the convex portion for allowing the spout and the plug to engage with each other in a state where the plug is inserted into the spout and the planned opening is opened are simple. The manufacturing cost is low because of the circular structure. And, when the plug is inserted again, the inserted plug in the inserted state is stably held at the spout by the concave portion and the convex portion, so that simple sealing can be surely performed, thereby improving the plugging effect.

According to invention of Claim 4, since the said spout and the said insertion plug are screwed together, the said scheduled opening part can be opened reliably and easily, inserting the said insertion plug stably. Furthermore, since the accuracy of simple sealing is improved due to the screwed structure, the re-plugging effect is ensured and the quality of the unsealing / re-plugging device is improved.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a paper container 1 showing a state in which an opening recapping device 6 is attached so as to cover a planned opening portion 5 of a paper container body 1a having a rectangular parallelepiped appearance in a first embodiment of the present invention. It is AA sectional drawing of FIG. 1 in 1st embodiment of this invention, and is a figure which shows the cross-sectional shape of the opening reclosing apparatus 6. FIG. It is a BB arrow line view of Drawing 1 in a first embodiment of the present invention, and is a plane partial perspective view of unsealing re-plugging device 6. It is an expansion | deployment top view of the strip | belt-shaped packaging material 15 which forms the paper container main body 1a in 1st embodiment of this invention. It is CC sectional drawing of FIG. 4 in 1st embodiment of this invention, and is a figure which shows the state of the opening scheduled part 5. FIG. In order to open the paper container 1 in the first embodiment of the present invention, the plug 11 is removed from the holding portion 12 of the unsealing device 6 and the plug 11 is removed from the spout 10 with the cover 13 removed. It is sectional drawing which shows the state which inserts. It is sectional drawing which shows the state which pushed in the holding part 11b of the insertion plug 11, and opened the opening plan part 5 in 1st embodiment of this invention. In the first embodiment of the present invention, after opening the planned opening portion 5, the insertion plug 11 is housed in the holding portion 12, and the paper container 1 is tilted to discharge the content liquid K from the spout 10. It is sectional drawing. It is sectional drawing which shows the state which tries to screw and insert the insertion plug 14 in the spout 10 in order to open a paper container in 2nd embodiment of this invention. It is sectional drawing which shows the state which opened the planned opening part 5 with the insertion plug 14 in 2nd embodiment of this invention. In the conventional example, the base portion 25 is fixed along the planned opening portion 22 </ b> A closed by the sealing film 24, and the screw cap 27 is externally screwed onto the upper portion of the retainer 26 screwed into the base portion 25. It is sectional drawing which shows the state of the opening recapping device 21 formed.

<First embodiment of the present invention>
Below, 1st embodiment of this invention is described based on FIGS.
<Configuration of paper container opening and closing device>

As shown in FIGS. 1, 2, and 3, the paper container 1 has a rectangular top surface 2, bottom surface 3, and four side surfaces 4 (front surface 4 a, back surface 4 b, side surface 4 c, and side surface 4 d) by bending a paper base material A rectangular parallelepiped paper container main body 1a is formed. A circular opening planned portion 5 for pouring a liquid content such as juice is formed on the top surface 2, and a resin opening / closing plugging device 6 is attached to cover the planned opening portion 5.

The unsealing / repealing device 6 has a substantially rectangular shape in plan view, and the top surface 8 of the main body 7 is formed in an arc shape with a width W and a length S and four corners. The bottom surface 9 is parallel to the top surface 8 and has a thickness T between the top surface 8 and the bottom surface 9. A cylindrical spout 10 that is concentric with the planned opening portion 5 and also serves as an insertion port of the insertion plug is formed in the main body portion 7 so as to penetrate the bottom surface 9 from the top surface 8.

The main body part 7 is provided with a holding part 12 that detachably holds a plug 11 for opening and replugging the planned opening part 5 in a detachable manner. More specifically, the holding portion 12 is formed so that one end portion 7a of the main body portion 7 extends in a substantially arc shape to the bottom surface 9 leaving the thin portion 8a on the top surface 8 side. Further, a protrusion 8b is formed at the tip of the thin portion 8a in order to stably hold the plug 11 in the holding portion 12. On the other hand, the other end portion 7 b of the main body portion 7 is formed with an inclined portion 7 c from the top surface 8 to the bottom surface 9 toward the spout 10.

The plug 11 includes an insertion portion 11a for opening and a gripping portion 11b for pushing the insertion portion 11a. The insertion portion 11a has a circular cross section, and its diameter D is the same as the diameter D1 of the planned opening portion 5, and the distal end portion 11c has an inclination of α = approximately 45 degrees for easy opening.

The holding part 11b has a rectangular plate shape, the width D2 is larger than the diameter D, and the inner diameter D3 of the spout 10 is slightly larger than the diameter D in order to facilitate the insertion of the insertion part 11a. In order to stably fit and hold the inserted plug 11 in the spout 10, a pair of annular convex portions 11 d and a concave portion 10 a in the spout 10 are formed in the plug 11.

A cover 13 is provided on the top surface 8 from one end 7a to the other end b of the main body 7, and the cover 13 is formed with a bent portion 13b so as to cover the other end 7b. For this reason, since the other end part 7b which is a side which pours a content liquid can be protected avoiding dust etc. until use, hygiene improves.

As shown in FIG. 4, a plurality of creases 18 are formed in the band-shaped packaging material 15 for facilitating molding of the paper container body 1 a. More specifically, in the region C corresponding to one paper container, vertical folds 16a, 16b, 16c, 16d, horizontal folds 17a, 17b, 17c, 17d, and eight diagonal folds 18 are formed. The The circular opening plan part 5 for pouring the content liquid in the area | region applicable to the top surface 2 by the side of the front 4a of the said paper container main body 1a is formed.

As shown in FIG. 5, the packaging material 15 is composed of an outer layer 15a, a paper base material 15b, an adhesive layer 15c, a barrier layer 15d, and two inner layers 15e in this order from the outer side to the inner side. A design or the like 15f is printed in advance on the outer surface of the sheet. The outer layer 15a and the inner layer 15e are formed of a low density polyethylene resin, the adhesive layer 15c is formed of a resin such as polyethylene or an ethylene copolymer, and the barrier layer 15d is formed of an aluminum foil or the like. In order to facilitate opening of the planned opening portion 5, the paper base material 15b is cut out in a circular shape.

“Description of manufacturing process of paper container with unsealing device”
In a filling machine (not shown), both ends are overlapped while transporting the belt-like packaging material 15 and vertically sealed in a cylindrical shape, filled with the content liquid, and then sealed horizontally to seal the region E corresponding to one paper container. To form an original container. Then, the vertical folds 16a, 16b, 16c, 16d, the horizontal folds 17a, 17b, 17d, 17e, and the plurality of oblique folds 18 are folded to form a rectangular top surface 2, bottom surface 3, and four side surfaces 4. A rectangular parallelepiped paper container body 1a is continuously formed.

A method of attaching the opening / repealing device 6 to the top surface 2 of the paper container main body 1a is performed by melting the bottom surface 9 with a microframe or the like using a device not shown, and aligning and fixing to the planned opening portion 5 of the top surface 2.

<Operation of the paper container opening and re-sealing device>
The insertion plug 11 includes an insertion portion 11a for opening and a gripping portion 11b for pushing the insertion portion 11a. The insertion portion 11a has a circular cross section and its diameter D is the same as the diameter D1 of the planned opening portion 5. Thus, the tip portion 11c has an inclination of α = approximately 45 degrees for easy opening.

For this reason, FIG. As shown in FIG. 7, when the plug 11 is pushed into the spout 10, the opening 5a can be easily pierced to form the opening 5a. When the plug 11 is further pushed in, the convex portion 11 d of the plug 11 and the concave portion 10 a of the spout 10 are fitted, and the plug 11 is stably held in the spout 10.

As shown in FIG. 8, when the content liquid is poured out from the spout 10, the insertion plug 11 can be pulled out from the spout 10 and stored in the holding portion 12 of the main body 6. When the paper container 1 is tilted, the content liquid can be easily poured out from the spout 10 as indicated by the arrow K. At this time, since the other end portion 7b of the main body portion 7 is formed with an inclined portion 7c from the top surface 8 to the bottom surface 9 toward the spout 10, the content liquid drips along the main body portion 7. Since it flows out without sanitary, hygiene is improved.

In the case of re-plugging after the desired content liquid has been poured out, when the plug 11 is pushed again into the spout 10 and returned to the state of FIG. 7, the convex portion 11d of the plug 11 and the concave portion of the spout 10 are provided. In addition to the fitting of 10a, the diameter D of the insertion portion 11a is the same as the diameter D1 of the opening 5 of the paper container 1, so that the opening 5 opened by the plug 11 can be easily and simply sealed. it can. For this reason, it is excellent in convenience and the leakage of the content liquid from the spout 10 can be reliably prevented.

<Second embodiment of the present invention>
Although the second embodiment of the present invention will be described with reference to FIGS. 9 and 10, the same reference numerals are used for the same configurations as those in FIGS. 2, 3, 6, and 7, and redundant descriptions are omitted.

As shown in FIGS. 9 and 10, since the male screw P and the female screw Q are formed in the plug 14 and the spout 10, respectively, the plug 14 is spouted when the plug 14 is rotated in the S direction. 10 and screwed down easily.

When the insertion plug 14 is lowered, the opening protrusion 11c has an inclination of about 45 degrees, so that the opening portion 5a can be easily formed by piercing the opening opening portion 5 while rotating. In this state, the insertion plug 14 and the spout 10 can be simply and reliably sealed by fitting the male screw P and the female screw Q. Then, the content liquid can be poured out from the spout 10 by removing the plug 14.

The embodiment of the present invention has been described with reference to the drawings. However, the specific configuration is not limited to this embodiment, and design changes and the like within the scope of the present invention are included in the present invention. It is.

For example, the plan view shape of the unsealing / repealing device 6 is formed in a circular shape so that the other end portion 7b surrounds the spout 10 and is connected to the one end portion 7a. The number of types can be increased. The area of the cover 13 can also be limited to cover only the spout 10. You may form the front-end | tip part 11c of the opening protrusion 11a in cone shape. A plurality of sets of the annular convex portion 11c of the plug 11 and the concave portion 10a of the spout 10 may be formed. The rotation direction S of the plug 14 may be configured to descend by rotating clockwise. The unsealing and re-sealing device 6 is used for a paper container whose top surface is a roof-like paper container or a method of sealing the top surface after filling each original container formed with a bottom surface and a plurality of side surfaces with the content liquid. Can also be applied.

The present invention can be applied to the manufacture of a packaging container for packaging and filling a fluid food.

DESCRIPTION OF SYMBOLS 1a Paper container main body 2 Top surface 5 Opening planned part 6 Opening / repealing device 7 Main body part 8 Top surface 9 Bottom face 10 Outlet 10a Recess 11 Insertion plug 11a Insertion part 11b Grip part 11c Tip part 11d Protrusion part 12 Holding part

Claims (4)

A paper container opening and re-sealing device provided in a paper container body formed by bending a paper base material to form a top surface, a bottom surface, and a plurality of side surfaces,
The unsealing and re-sealing device covers a planned opening portion for pouring the content liquid formed on the top surface and is fixed to the top surface, and an insertion plug for unsealing and resealing the planned opening portion A holding portion for detachably holding the insertion plug at the outer edge portion of the main body portion, while the main body portion is concentric with the planned opening portion and a liquid outlet is connected to the insertion plug. An opening / re-sealing device for a paper container, which is also formed as a slot. The paper container opening and closing device according to claim 1, wherein the main body portion includes a cover that covers the spout. The opening and closing stopper for a paper container according to claim 1 or 2, wherein the spout and the plug are inserted in the state where the plug is inserted into the spout and the planned opening is opened. An unsealing and re-sealing device for a paper container, comprising annular recesses and projections engaging each other. 3. The paper container opening and re-sealing device according to claim 1, wherein the spout and the insertion plug are screwed together.