JP4107906B2 - Packaging box and packaging structure using the same - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a recyclable paper packaging box that can be used together with a soft packaging bag or the like for packaging of a liquid material and a packaging structure using the same.
[0002]
[Prior art]
Various types of PET bottles, milk cartons, flexible packaging bags, and the like have been widely used as packaging containers for liquid packages.
However, the PET bottle has a large ratio of the amount of resin used to the capacity, which has a problem in terms of resource saving and cost, and also has a problem that the transportation and storage space becomes large not only before use but also in the recycling process after use. In addition, there is a problem that the space efficiency is poor even when storing, displaying, etc. after filling the packaged goods.
[0003]
On the other hand, so-called milk cartons as packaging containers for milk, yogurt, sake, etc., sufficiently support the weight of the packaged goods by themselves, and reduce the paper thickness from the need to prevent the packaged articles from leaching out. Virgin pulp is used with a thickness of about 350 μm and considering rigidity and odor. Moreover, since it is necessary to coat both the inner and outer surfaces with polyethylene and other resin materials, this also has a problem of resource saving and cost, and this milk carton has a roof-like top wall. Since it cannot be stacked in a vertical position, the space efficiency during transportation, storage, and display, etc., especially after filling and packing the packaged goods is poor, and furthermore, the resin material coating layer is removed during recycling. There was another problem that would be necessary.
[0004]
[Problems to be solved by the invention]
The object of the present invention is to solve such problems of the prior art, and the object of the present invention is to share excellent use with soft packaging bags, thereby achieving excellent resource saving and low cost. The present invention provides a paper packaging box and a packaging structure using the same, which can greatly improve space efficiency both before and after use and during use, and can be extremely easily recycled. It is in.
[0005]
[Means for Solving the Problems]
The packaging box according to the present invention is made of paper having both a flat bottom lid and a canopy, and respective side walls connecting them, and the entire side wall height of each side wall is the total width of the side walls. those extending Mashimashi by Rutotomoni spaced a plurality of grooves in the height direction to protrude to the side wall inner surface, the arrangement pitch of the groove, becomes to be smaller than the upper half portion in the lower half portion over is there.
It can be six tetrahedral structure, the packaging box of prefabricated, for example, by accommodating the flexible packaging bag filling and packaging a liquid packed material therein, liquid-tight against the packaged articles, airtightness In addition, since various softnesses can be secured to the flexible packaging bag, the function itself mainly exhibits the function of supporting the weight of the article to be packaged.
[0006]
In this case, the packaging box supports the weight of the liquid package, and can still effectively suppress its deformation, which is advantageous in terms of space efficiency during transportation, storage, display, etc. of the package. Also, it is advantageous in improving the appearance.
So here, such as a conventional milk carton, without the use of paper made of a 350μm approximately even thick virgin pulp results in a disadvantage on resource conservation and cost, boxes for packaging, of the side walls, the width direction In order to prevent so-called torsional deformation of the middle wall in the height direction, for example, at least the lower half of the side wall is provided with a plurality of grooves extending over the entire width of the side wall. The groove is made to function as a reinforcing rib protruding from the inner surface of the side wall.
[0007]
These reinforcing ribs effectively support the head pressure of the package, which gradually increases toward the bottom lid of the packaging box, and effective for the blistering that tends to occur especially in the lower half of the packaging box Therefore, this packaging box can sufficiently enhance the space efficiency when displaying the packaged object and the like, and can improve the appearance.
Here, when the lower end portion of the side wall is fixed to the bottom lid, the bulging deformation of the lower end portion may be substantially zero based on the firm support of the lower end portion of the side wall by the bottom lid. it can.
[0008]
By the way, such a packaging box can be greatly reduced in volume by being crushed or disassembled after it is used. Therefore, whether it is used for recycling or discarded. , Transportation efficiency can be greatly increased. In addition, since this packaging box does not require a resin material coating layer for the purpose of increasing the strength of the box and preventing oozing of the liquid package, such a coating layer when recycling the packaging box. A special process for removing the film is also unnecessary.
[0009]
In such a packaging box, when a plurality of grooves are provided over the entire side wall height, it is possible to more advantageously prevent the packaging box from swelling.
In this case, as described in the present invention, the arrangement pitch of the grooves is made smaller in the lower half portion than in the upper half portion, and the reinforcing function of the lower half portion is relatively enhanced, so that the article to be wrapped The difference in the water head pressure can be advantageously absorbed, and the occurrence of the swollen body can be more effectively prevented.
[0010]
Each groove can be extended obliquely with respect to the side edge of the side wall. In this case as well, the groove can effectively exhibit the function of suppressing trunk swelling, Compared with the case where it is extended in a direction substantially perpendicular to the side wall side edge, the cracking resistance of the packaging box tends to be inferior, and when the groove pitch is reduced, the box tends to twist. Therefore, preferably, each groove is extended in a direction substantially orthogonal to the side wall side edge.
On the other hand, the cross-sectional shape of the groove can be V-shaped, U-shaped, arc-shaped or the like, and a sharp shape such as a V-shape is advantageous in terms of strength. In particular, a sharp groove may cause permanent distortion in the packaging box, and is more likely to crack when the packaging box is laid down in relation to the density of the groove. It is in.
Therefore, the cross-sectional shape of the groove is V-shaped, U-shaped, circular depending on the volume of the liquid package, the height of the packaging box, the groove volume of the groove, the pitch of the grooves, etc. It can be appropriately selected from an arc shape or the like.
[0011]
Thus, according to the packaging box of Turkey can be a hexahedral structure, the paper thickness without the 350μm about stuff thickness, can be supported without deformation swelling body weight of the package item, While saving resources and cost benefits, it is possible to improve the space efficiency for display etc. and improve the appearance, and to transport and store the packaged items by stacking the top and bottom of the box In addition, the space efficiency during display can be increased.
[0012]
The packaging structure according to the present invention is one in which a packaging bag made of a single-layer or laminated film and filled with an article to be packaged is stored in any of the packaging boxes described above.
In this packaging structure, it is sufficient to give the flexible packaging bag airtightness and liquid-tightness and the necessary barrier properties under the weight support function of the packaging box itself, so that the shape of the packaging bag itself is sufficient. The thickness of the packaging bag can be reduced as compared with the case of providing a holding function or the like. Compared to the case where the packaging bag itself is placed in a distribution channel, the space efficiency can be greatly increased due to the regularity of the packaging box, and direct impact such as impact on the packaging bag, external force, friction, etc. It is possible to effectively prevent fears such as bag breakage and pinholes due to the action.
[0013]
Here, when the packaging bag is composed of a thermoplastic plastic film, it is possible to easily and quickly make a packaging bag having the required physical properties by using known heat sealing means, etc. When it is composed of a non-stretched film, when dispensing the liquid package in the packaging bag, for example, by inserting a dispensing nozzle having a tapered tapered end portion into the packaging bag, Based on the elastic shrinkage force of the stretched film, the pouring nozzle can be held airtight and liquid-tight by the packaging bag itself with a sufficiently large force. Therefore, it is possible to sufficiently prevent the unloading nozzle from being accidentally pulled out at the time of dispensing an object to be packaged once or a plurality of times without providing any special attachment means for the dispensing nozzle. .
[0014]
By the way, when a packaging bag is composed of a laminate of a thermoplastic plastic film and an aluminum foil or other non-thermoplastic intermediate layer, the packaging bag can be made easily and quickly without changing the packaging bag. Excellent barrier property against gas and others can be imparted.
In addition, such a packaging bag is provided with a heat seal portion having a substantially triangular shape in plan view on each side portion of the bottom portion of the side-sealed packaging bag formed by heat-sealing both sides of a thermoplastic plastic film. It is preferable to use a square-bottom packaging bag. According to this, since the square bottom portion can advantageously prevent mutual displacement or contact between the front and back film portions, a large-capacity packaging bag can be easily manufactured. be able to.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
The following will be described with reference to the place that shows the inventions in drawings.
FIG. 1 is a perspective view showing a basic form of a packaging box according to the present invention, and FIG. 2 is a development view thereof.
Here, in this packaging box having a hexahedral structure, reference numerals 1 and 2 denote a rectangular canopy and a bottom lid, both of which are flat, and reference numeral 3 denotes respective side walls that are assembled and connect the two.
Here, a plurality of grooves 4 having a substantially V-shaped cross section are formed in the lower half of each side wall 3 that can be 70 mm in width and 210 mm in height in a direction substantially perpendicular to the side wall side edge. Are provided so as to extend over the entire width of each side wall 3, and the arrangement pitch of each strip groove 4 in the side wall height direction is, for example, 16 mm, and the opening width of each strip groove 4 is also, for example, 8 mm. And
By forming the groove 4 in this way, the protrusion 5 functioning as a reinforcing rib is formed on the inner surface side of the packaging box as shown in the enlarged vertical sectional view of the main part in FIG. .
[0016]
In such a packaging box, preferably, the bottom lid 2 is provided with, for example, the folding pieces 6a provided on itself and the respective side folding pieces 6b provided on both side walls 3 positioned across the bottom lid forming side wall. Then, it is fixed to each side wall 3 with an adhesive or the like. According to this, as described above, the bulging deformation in the vicinity of the bottom lid of each side wall 3 that is most affected by the head pressure of the liquid package is effectively restrained by the bottom lid 2. be able to.
[0017]
For example, a square bottom packaging bag is stored inside such a packaging box in a state of filling and packaging of a packaged object, and a non-thermoplastic film between a non-stretched film and a thermoplastic unstretched plastic film having a single layer or a laminated structure. A rectangular plastic film consisting of a laminate film that may contain a non-thermoplastic intermediate layer is laminated in the longitudinal direction at the center by a laminated film containing an intermediate layer or a laminated structure of a stretched film and an unstretched film. A side-seal type packaging bag 8 formed by folding and forming both side seal portions 7 by heat-sealing both sides thereof as shown by hatching in FIG. As shown in FIG. 4 (b), a heat seal portion 9 having a substantially triangular shape in a plan view can be formed on each side portion of the bottom portion of the packaging bag 8.
[0018]
The square bottom packaging bag 10 configured as described above becomes a packaging bag that can stand on its own with a simple structure, and in particular, due to the existence of the bottom of the square bottom, the basic form thereof is shown in FIG. Compared to the side-sealed packaging bag 8 having the same dimensions as shown, a larger amount of the packaged article is filled, and the bag opening can be reliably sealed by heat sealing. That is, the side-sealed packaging bag 8 shown in FIG. 4 (a) shows a tendency that the front and rear film parts approach or contact each other in its normal state. In sealing the bag opening, the article to be packed overflows from the opening.
[0019]
However, in this square bottom packaging bag 10, when the liquid package is filled there, as shown in FIG. 5, a large bulging deformation of the square bottom packaging bag 10, particularly in the front and rear direction, in the vicinity of the bottom portion. Therefore, even when a large amount of objects to be packaged is filled, the elastic restoring force in the crushing direction of the packaging bag itself is advantageously suppressed, so that a reliable sealing of the bag opening can be realized.
[0020]
6 was filled package to be packaged, the filling packaging bag 11 as described above, the packaging box in previously described, in the deformation under the filling packaging bag 11, in a state housed in nearly full It is a perspective view which shows a packaging structure.
In this packaging structure, the filling and packaging bag 11 is sufficiently protected and shielded from light by the packaging box 12, and is given a stable self-supporting posture by the box 12 and is covered. Supported by the weight of the package, the shape will be forcibly specified.
[0021]
In the other hand, packaging box 12 for supporting the weight of the packed material is, by improving the load bearing capacity based on formation of grooves 4 to the side wall 3, without cylinder bulging deformation, that its weight is supported lifting Can do.
Therefore, as mentioned above, resource saving and cost reduction for packaging bags can be realized, and space efficiency can be improved in addition to the efficiency of storage and transportation of the packaged items. The appearance of the object can be improved, and further, the occurrence of pinholes and other damages to the packaging bag can be effectively prevented.
[0022]
In such a packaging structure, more preferably, each heat seal portion 9 having a substantially triangular shape at the bottom of the filling and packaging bag 11 is overlapped with the canopy 1 or the bottom lid 2 of the box 12 and the bottom lid 2 in the figure. It joins to the inner surface of the side part folding piece 6b. In this case, the joining of the heat seal portion 9 is performed by fusion of the heat seal portion itself by impulse seal, high frequency seal, heat seal, etc., compared to the case where an adhesive or the like is used. There are the above advantages. By the way, this fusion of the heat seal portion 9 can be performed directly on the paper surface of the side folded piece 6b, or can be performed on a plastic layer, such as a polyolefin resin layer, coated or laminated thereon. .
[0023]
By the way, the pouring of the article to be packaged under such a packaging structure is performed by cutting and removing one corner of the filled packaging bag 11 accommodated in the packaging box 12 as indicated by a virtual line in FIG. In addition, for example, in forming at least one of the triangular heat seal portions 9, as shown in FIG. 6, as shown in FIG. In a state where the outlet passage 13 is partitioned and the outlet passage 13 is left as it is even when the heat seal portion 9 is joined to the side folding piece 6b, as shown by a virtual line in FIG. The heat seal portion 9 can be cut by cutting the transverse passage 6 along with the side folding piece 6b and forming a cut opening in the dispensing passage 13. A small cut by tilting A required amount of packages can be poured out from the opening.
[0024]
In this case, the square-bottom packaging bag itself has excellent flexibility, and is compressed and deformed by an amount corresponding to the volume to be packaged. incorporation is not necessary, therefore, it is possible to effectively suppress the oxidation of the packaged product resulting from the entry of outside air into the bag, this means that the cut opening after the completion pouring of the packed material It is more effective when sealed with a clip or the like.
In addition, in the case where the triangular heat seal portion 9 is not bonded to the side folded piece 6b, this pouring is performed by cutting only the heat seal portion 9 in the same manner, and forming a cut opening in the pouring passage 13. This can be done by providing.
[0025]
Here, in the case where the plastic film forming the square bottom packaging bag 10 is constituted by an unstretched film having a single layer or a laminated structure, the triangular heat seal portion 9 of the filling packaging bag 11 is connected to the side folded piece 6b. Fusion as described above can be easily performed based on its melting at a relatively low temperature.
[0026]
Further, in this case, the dispensing nozzle has a substantially conical tapered end portion as shown in FIG. 15 or a straw 16 having an inclined tip portion can be inserted under an expansion deformation in the elastic region of the plastic film, and the packaged article can be poured out, sucked out, etc. In such a stab, the side folded piece 6b of the box 12 to which the heat seal portion 9 is joined is placed in a fully open posture as shown in FIG. It is preferable to carry out with a slight tension applied to it in order to achieve smooth and reliable insertion into a required position.
[0027]
After the lead-out nozzle 15 and the like are inserted in this way, the bottom portion 14 of the filling and packaging bag 11 made of an unstretched film is formed around the lead-out nozzle 15 and the like penetrating therethrough based on its own elastic restoring force. In close contact with each other to provide sufficient airtightness and liquid tightness and sufficient holding power for the nozzle and the like. Therefore, when the packaged article is poured out through the outlet nozzle 15 and the like, the box 12 is tilted, and the unexpected displacement of the outlet nozzle 15 and the like is reliably prevented, and the outlet nozzle 15 and the bottom portion are prevented. It is also possible to reliably prevent leakage of the article to be packaged and the entry of outside air.
[0028]
On the other hand, when the square bottom packaging bag 10 includes a stretched film layer and a non-stretched film layer, or is formed of a laminated structure plastic film that may include a non-thermoplastic intermediate layer between both layers. When the bonding of the triangular heat seal portion 9 of the filling packaging bag 11 to the side folded piece 6b is performed by fusion, it is usually located on the outer surface side of the packaging bag, with various barrier properties. It is preferable to provide one or more holes that expose the unstretched film layer on the surface facing the side folded piece 6b, such as an excellent stretched film. According to this, the unstretched film layer is As in the previous case, it can be easily fusion-bonded to the side folded piece 6b.
And in the packaging structure comprised in this way, the extraction | pouring etc. of the to-be-packaged goods from the narrow width | variety extraction channel | path 13 divided into the heat seal part 9 can be performed similarly to having mentioned above. .
[0029]
However, when the plastic film is composed of, for example, an outermost stretched film layer 17, an unstretched film layer 18 as an intermediate layer, and an unstretched film layer 19 as a sealant layer, as shown in FIG. When all of these layers 17, 18, and 19 are firmly bonded and laminated, the outlet nozzle 15 and the like are provided on the stretched film 17 that forms the outer surface of the bottom 14 of the filling and packaging bag 11, as shown in FIG. When pierced, cracks generated in the stretched film layer 17 propagate to the other unstretched film layers 18 and 19 and progress to the entire plastic film. It is practically impossible to exert the nozzle holding force or the like.
[0030]
8 (a), an unstretched film layer 19 serving as the innermost layer of the laminated film is laminated via a release layer 20 at least in the central portion of the packaging bag bottom 14, and the lead-out nozzle 15 or the like The innermost unstretched film layer 19 is configured so that it can be easily separated from the intermediate layer as shown by the phantom line in the figure by the action of the release layer 20 at the time of piercing from the outermost layer side. 8 (b), an unstretched film 21 having a ring shape such as a square or a circle is formed on the inner surface of the sealant layer at least in the central portion of the bottom portion 14, and the peripheral portion thereof is airtight. And it is made liquid-tight.
[0031]
In any of these cases, the lead-out nozzle 15, the straw 16 and the like inserted from the outermost layer side are allowed to penetrate the peeling portion of the non-stretched film layer 19 or the non-stretched film 21 while stretching and deforming in the elastic region. Thus, the same air tightness, liquid tightness, nozzle holding force and the like as described with reference to FIG. 7 can be provided. In this case, even if the unstretched film layer 18 firmly bonded to the stretched film layer 17 has crack propagation, progress, etc., it propagates to the peeled portion of the unstretched film layer 19 and the unstretched film 21. Therefore, it is possible to sufficiently ensure the reliable operation of the above action.
[0032]
By the way, such pouring, sucking out, etc. of the packaged goods is also under the decrease corresponding to the liquid pouring amount etc. of the packaging bag volume due to the excellent flexibility of the filling packaging bag 11 made of plastic film. Since it is carried out and it is not necessary to take in the outside air into the packaging bag due to the pouring or the like, it is possible to effectively prevent oxidation, contamination, flavor reduction, etc. due to outside air such as liquid in the bag.
[0033]
As described above, the packaging box provided with a groove in the lower half of each side wall and the packaging structure containing the packaging bag filled and packaged with the article to be packaged therein have been described. As shown in FIG. 9, it can also be provided over the entire side wall height, and according to this, it is possible to more effectively suppress the bulging deformation. In this figure, each groove 4 is arranged at an equal pitch in the height direction of the side wall 3, but the arrangement pitch is gradually lower in the lower half of the side wall 3 than in the upper half. Or it can also be made small in steps, and according to this, the swelling of the body in the lower half where the head pressure of the article to be packaged increases can be more effectively suppressed.
[0034]
In FIG. 10, the cross-sectional shape of the groove 4 is an arc shape, and the groove 4 having an opening width of 10 mm is provided over the entire height of each side wall 3 at an arrangement pitch of 15 mm. Even with this packaging box, it is possible to effectively suppress the occurrence of swollen deformation under the action of the reinforcing ribs based on the formation of the grooves 4 without increasing the thickness of the paper so much as to increase the weight of the package. Can be supported.
[0035]
However, such arc-shaped groove 4 is also Ru can be reduced the arrangement pitch of it under half of the side walls 3.
[0036]
【The invention's effect】
As is apparent from the above description, according to the present invention, the groove provided on the side wall of the packaging box, and hence the reinforcing rib formed by the groove, causes the box to bulge and deform. The load-bearing capacity can be greatly increased, so that excellent resource saving and packaging cost can be reduced sufficiently, and the packaging boxes can be stacked up and down. Combined with the ability to suppress bulging deformation, the space efficiency during transportation, storage, display, etc. can be improved, the appearance at the time of display can be improved, and recycling can be made extremely easy. Can do.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a basic form of a packaging box according to the present invention.
FIG. 2 is a development view of the packaging box shown in FIG.
FIG. 3 is an enlarged cross-sectional view of a main part of a side wall.
FIG. 4 is a diagram showing a manufacturing process of a square bottom packaging bag.
FIG. 5 is a perspective view showing a filling and packaging bag.
FIG. 6 is a perspective view showing an embodiment of a packaging structure according to the present invention.
FIG. 7 is a cross-sectional view showing an example of inserting a lead-out nozzle or the like into the bottom of the filling and packaging bag.
FIG. 8 is a cross-sectional view showing an example of interposing a release layer to a laminated plastic film and an example of joining an unstretched film thereto.
9 is a perspective view showing another form state of the packaging box.
10 is a perspective view showing still another form state of the packaging box.

Claims (8)

A paper packaging box having both a flat bottom cover and a canopy and respective side walls,
The whole of the side wall height of each side wall, Rutotomoni spaced a plurality of grooves projecting sidewall inner surface extending over the entire width of the side walls in the height direction, the arrangement pitch of the grooves, the lower A packaging box that is half smaller than the upper half . The packaging box according to claim 1, wherein each groove is extended in a direction substantially orthogonal to the side edge of the side wall. The packaging box according to claim 1 or 2 , wherein the cross-sectional shape of the groove is V-shaped, U-shaped or arc-shaped. The packaging box according to any one of claims 1 to 3 is constituted by a film of single layer or multilayer structure, packaging ing houses a packaging bag filled with articles to be packaged structure. The packaging structure according to claim 4 , wherein the packaging bag is made of a thermoplastic plastic film. The packaging structure according to claim 5 , wherein the packaging bag is made of an unstretched plastic film. The packaging structure according to claim 4 , wherein the packaging bag is constituted by a laminate of a thermoplastic plastic film and a non-thermoplastic intermediate layer. The packaging bag is a square-bottom packaging bag in which a heat-seal portion having a substantially triangular shape in plan view is provided on each side portion of the bottom portion of the side-sealed packaging bag formed by heat-sealing both sides of the thermoplastic film. The packaging structure according to any one of claims 4 to 7 .

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