JP2005088896A - Packaging box and packaging structure using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a packaging box, which dispenses with lamination with a resin material and can be made of used paper, eliminates a trouble in unsealing the box yet allows a desired, easy, and sure opening operation, ensures the closure of an opening after unsealing, and facilitates the specification of an outflow direction of a packaged article. <P>SOLUTION: According to the packaging box, a door member 8 is formed on the upper part of one side wall 1 of a paper box 6 in such a way that the door member 8 swings on the corner of the side wall 1 in a horizontal plane to fit into an opening 7 formed on the upper part of the side wall 1. A projection 9, which is hooked on the outer surface of the door member 8, is also formed on the side wall 1. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention contains a paper packaging box, in particular, a soft packaging bag with a non-returning nozzle for wrapping liquids, liquids, etc. And a packaging box for easily and reliably storing a check-out nozzle in the box after finishing dispensing, The present invention relates to a packaging structure using.

Various box cartons such as milk packs and fruit juice packs are widely used as box-like containers used for pouring filled and packaged liquid packages multiple times.
Paper cartons are used as packaging containers for packages with a volume of about 100 to 3000 ml, and are easier to handle than glass bottles, plastic bottles, cans, etc. There is an advantage that the floor area efficiency is higher than various bottles, cans and the like having a circular outer contour shape (Patent Document 1).
Japanese Utility Model Publication No. 6-81927

  However, this type of paper carton is itself assembled by fusion-bonding of resin materials, and directly fills and wraps the packaged material inside thereof, and further has sufficient resistance. Since it is necessary to give wettability, polyethylene and other resin materials are laminated at least on both the inside and outside, and this makes it inevitable to remove the resin material when recycling paper cartons. On the other hand, in the production of the paper carton itself, there is a problem that the use of 100% virgin parb becomes essential and the used paper cannot be used.

  In addition, when opening a paper carton whose top part forms a roof mold, in addition to being troublesome that it is necessary to peel off the fusion-bonded part of the resin material of the roof mold top part with fingers, In many cases, the opening cannot be opened, and it is impossible to sufficiently close the opening once opened.

  On the other hand, the brick-type paper carton with a flat top part is still troublesome at the time of opening by cutting the fused end part bent onto the side wall with scissors. Surely done. Moreover, it is possible to sufficiently close the opened opening by bending the fusion bonding portion at the top onto the side wall.

  However, in this brick type paper carton, in many cases, the filling height of the package and the opening height are quite close, so that the package is not intended especially for the first dispensing. There was a problem that there was a high possibility of flowing down in the direction.

  An object of the present invention is to solve such problems of the conventional paper carton, and the object of the invention is to provide a packaging structure with a soft and flexible packaging function. The functional separation between the packaging bag and the packaging box that imparts formability to the packaging bag eliminates the need for laminating resin material on the box, enables the use of waste paper, and opens the box. In addition to making it easier and more reliable to open as expected, it is also possible to ensure that the opened opening is sufficiently closed, and in addition, the flow direction of the packaged goods It is an object of the present invention to provide a packaging box and a packaging structure using the same.

The packaging box according to the present invention swings and displaces in a horizontal plane at the upper part of one side wall of a paper box with the corner of the side wall as a fulcrum, and into an opening provided in the upper part of the side wall. Preferably, a door member that fits exactly is provided, and a protrusion that engages with the outer surface of the door member is provided on the side wall.
Here, the formation position of the protrusion with respect to the door member can be a position corresponding to the linearly extending portion extending in the vertical direction, the horizontal direction, or the oblique direction of the door member, and the contour shape of the door member. It is also possible to make the position corresponding to the corner where the angle is the angle of entry or entry. In particular, according to the latter, it is possible to effectively prevent the insufficient opening of the door member with a sufficiently small one protrusion.
Preferably, the door member is provided with a stopper that is engaged with the inner surface of the side wall to restrain excessive opening of the door member. In addition, it is advantageous to connect this stopper to the upper end of the door member via a connecting member in terms of material removal of the packaging box and the number of steps for assembling the box.
In this case, the connecting member is formed in a substantially fan shape around the swinging fulcrum of the door member, for example, over an angle range of 90 °, and at the boundary between the side wall and the continuous canopy or top folded piece. It is preferable to use an opening / closing guide that is in sliding contact in order to ensure a smooth and reliable opening / closing operation of the door member.
Preferably, a plurality of concave stripes extending in the horizontal direction are provided at predetermined intervals on each side wall in at least the lower half of the box. According to this, the deformation strength of the box can be increased, and the bulging deformation of the box when the soft packaging bag filled and packaged with a package is stored in the box can be obtained under the use of a thin paper material. It is possible to effectively prevent and improve the regularity more effectively.
By the way, when the box is made of water-resistant paper, for example, for some water wetting due to condensation or the like, the formability can be more sufficiently secured without laminating the resin material on the box.

The packaging structure according to the present invention uses any of the packaging boxes described above, and a flat check dispensing nozzle with a sealed tip is placed on the upper end portion of the soft packaging bag body. A packaging bag that is fused in a side projecting position is stored in a packaging box, and its check dispensing nozzle is attached to the inner surface of the door member, and part of the check dispensing nozzle is installed. The door member is positioned corresponding to the swing fulcrum of the door member.
Such a packaging structure exerts its original function when the packaging bag is filled and packaged with, for example, a liquid package. In this case, the packaging bag is displaced to the bottom of the box. In order to prevent lowering, it is preferable to fix or fix the upper part of the packaging bag to the upper part, the top part, etc. of the box body at a plurality of points.
Further, here, it is preferable that the check dispensing nozzle is attached to the door member in a posture in which at least a tip portion thereof is separated from the inner surface of the door member. According to this, a tip opening is provided in the check dispensing nozzle. When the liquid package is poured out from it, the inner surface of the door member can be prevented from getting wet with the package, and the pouring is stopped based on the standing operation of the box. In this case, it is possible to prevent the article to be packaged attached to the door member from flowing down into the box.

By the way, the non-return dispensing nozzle can be attached to the door member directly on the inner surface side of the door member or locally by fixing or fixing with a spacer, or on the inner surface side of the door member. It can also be attached to it by holding it, and this holding of the check dispensing nozzle can be performed integrally with the door member by folding back fixing or fixing of the folding piece that restrains the check dispensing nozzle. it can.
Of course, the folded piece can be integrally formed with the door member, but the folded piece is separated from the inner surface of the door member, or is integrated with the door member, It can also be provided in a separate spacer member.

In the packaging box according to the present invention, the door member is oscillated and displaced at the upper part of one side wall of the paper box, so that the door member is separated from the opening at the upper side of the side wall and the side wall opening. Preferably, the door member can be opened and closed between the closed position where the door member is fitted, and the door member and the side wall side of the door member are closed at the closed position of the door member. By engaging the engaging protrusion with the outer surface of the door member by elastic deformation of at least one of the engaging protrusions, the door member can be reliably restrained at the closed position.
On the other hand, the door member is opened by pressing and deforming a portion of the side wall in the vicinity of the hooking protrusion with a finger, and elastically deforming at least one of the protrusion and the door member, to the inside of the door of the protrusion. And then the door member can be opened by placing a finger on it.

Thus, in this case, the door member can be opened easily, and thus the box body can be easily opened as expected without using any tools, and the opening associated with the door member closing can be reliably performed. it can.
In addition, this packaging box functions to assist in the tilting and pouring operation of the soft packaging bag filled and packaged with the packaged product, and assists the tilting and pouring operation thereof. Since the box is not directly filled and packed, it is preferable that the box itself is made of water-resistant paper, and it is not necessary to provide a laminate layer of a resin material, and waste paper is used for the box. You can also

Moreover, in this packaging box, since the non-return dispensing nozzle of the packaging bag is attached to the inner surface side of the door member, the outflow direction of the package from the opening provided in the nozzle can always be easily specified. It is possible to reliably flow down the packaged item to the intended position.
This is more effective when the door member is provided with a stopper for specifying the opening limit position of the door member, and the opening position of the door member is specified as the opening limit position at the time of pouring of the spiked package. is there.

Here, when a plurality of recesses extending in the horizontal direction are provided in at least the lower half of the box, the thickness of the paper constituting the box is reduced, and the package is filled and packaged. The deformation strength with respect to the packaging bag accommodated in the packaging box can be increased, and excellent formability can be brought about. According to this, for example, 270 to 350 (g / m ² ) paper can be used for 1000 ml of an object to be packaged, and sufficient formability can be exhibited.

  In the packaging structure according to the present invention, the tip portion of the non-return dispensing nozzle attached to the inner surface side of the door member is excised by tearing with a finger, for example, under the opening of the door member, and the opening to the dispensing nozzle is opened. By forming the package, the packaged material packed and packaged in the packaging bag can be appropriately poured and stopped through the opening based on the tilting operation of the packaging box.

Here, when the packaging bag is tilted together with the packaging box so that the opening of the nozzle faces downward, the pouring nozzle made of a soft laminated film is used for the water head pressure of the package. Under the action, the front opening is opened apart from the front and back sides, allowing the packaged items to be dispensed as required.
When the packaged item is dispensed in this way, the flexible packaging bag body shrinks or collapses by the amount corresponding to the dispensed volume without sucking outside air as the packaged item is dispensed. Will be transformed.

On the other hand, after the required amount of items to be packaged is dispensed, the packaging bag and the packaging box are returned to their original standing posture to stop the dispensing, and at the same time as this dispensing is stopped, the dispensing nozzle The film on the front and back sides of the film is brought into close contact with each other in the width direction, in other words, in the up-and-down direction, thereby reliably preventing the outside air from entering the packaging bag.
Therefore, in the packaging bag having the dispensing nozzle, the packaged items in the bag are sufficiently protected from contact with the outside air during and after the dispensing as well as before the dispensing of the packaged items. As a result, oxidation, fouling and the like of the packaged items in the bag are effectively prevented.

By the way, such close contact of the film on the front and back of the pouring nozzle here, in addition to returning the pouring nozzle to the original shape at the time of manufacture by releasing the pouring nozzle from the action of the hydraulic head pressure by the standing return of the packaging bag, When the article to be packaged in the dispensing nozzle returns to the inside of the packaging bag body, the front and back films are exposed to a reduced pressure atmosphere and are mutually adsorbed under negative pressure, etc. The close contact is assisted by causing the packaging bag body, which has been shrunk or crushed and deformed as the article to be packaged from the packaging bag is poured, to have a reduced pressure inside due to its inherent elastic restoring force. It will be.
In this way, the tip opening of the packaging bag can be automatically sealed in close contact with the rising and returning of the packaging bag without any special operation on the dispensing nozzle, and the dispensing nozzle has an excellent check function. It can be demonstrated.

After the required dispensing of the article to be packaged in this way, the door member of the packaging box is brought to the closed position where it fits into the side wall opening, and the side wall protrusion to the outer surface of the door member is Engagement is brought about and the door member is held in the closed position.
Under such a closed posture of the door member, a check dispensing nozzle, a part of which is located corresponding to the swing fulcrum of the door member, is bent, for example, at a substantially right angle. Since the two sides of the film on the front and back sides are more securely adhered, when the door member is closed, the entry of outside air into the packaging bag will be more sufficiently prevented, and the packaging box Even if it is accidentally laid down, it is possible to effectively prevent unexpected leakage of the package.

  On the other hand, the re-pouring of the article to be packaged opens the door member of the packaging box by releasing the engagement between the door and the engagement protrusion, and the packaging bag as described above together with the packaging box. This can be done by tilting and can also be stopped as described above. In this case as well, the dispensing nozzle exhibits an excellent check function against the ingress of outside air based on the automatic close sealing.

The non-return dispensing nozzle can be attached to the inner surface of the door member with local fixation or fixation, so that sufficient separation of the film on the front and back of the nozzle can be smoothly carried out when the package is poured. Can be done. In other words, when either one film of the pouring nozzle is mechanically fixed over the entire width or fixed by an adhesive, etc., a sufficiently large separation deformation of the front and back films of the pouring nozzle is ensured. It cannot be done.
This also applies to the case where the pouring nozzle is held by folding or fixing the folded piece integrally formed with the door member, for example. When the package is poured out, the film on the front and back of the nozzle cannot be sufficiently separated.
Here, in the case where the dispensing nozzle is held with a folded piece or the like, in particular, the bending deformation as described above of the non-return dispensing nozzle accompanying the closing operation of the door member is more reliably performed by the folded piece. There are advantages that can be made.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a developed view showing an embodiment of a packaging box according to the present invention, and FIG. 2 is a perspective view showing an assembled state thereof.
This packaging box assembled as a quadrangular prism as a whole has four side walls 1, respective bottom wall constituting members 2, a canopy 3 provided so as to protrude upward from the one side wall 1, as shown in FIG. In the figure, each top folded piece 4 is formed by projecting upward from the two side walls 1, and the phantom line in FIG. 1 indicates a soft packaging bag accommodated in the packaging box. 5 is shown in the posture which does not fill with an article to be packaged.

Here, in the packaging box 6 made of paper, preferably water-resistant paper, as shown in FIG. 2, the upper side of one side wall 1 is oscillated and displaced in the horizontal plane with the corner of the side wall 1 as a fulcrum. The door member 8 is preferably fitted into the opening 7 provided in the upper portion of the side wall 1, and the side wall (hereinafter referred to as “open side wall”) 1 in which the opening 7 is formed is provided on the door member 8. One protrusion 9 is provided on the outer surface, which is engaged with the outer surface of the corner portion 8a of the door member 8 in the drawing.
In order to reduce the amount of protrusion of the door member 8, it is advantageous to provide the protrusion 9 in correspondence with the corner of the door member 8 that is the exit angle or the entrance angle. It is also possible to provide it corresponding to the linear extending portion.

Further, here, the stopper 10 that engages the door member 8 on the inner surface of the opening side wall 1 and restrains the excessive opening of the door member 8 is preferably connected to the upper end of the door member 8. Is provided. FIG. 3 is a partially broken enlarged perspective view showing these in the closed posture of the door member 8. In this closed posture, the connecting member 11 is located in a horizontal plane, while the stopper 10 is a side wall adjacent to the opening side wall 1. 1 is in a vertical state in contact with the inner surface of 1 and the distal end side extends away from the door member 8 as compared with the proximal end side.
On the other hand, the stopper 10 is formed on the inside of the opening side wall 1 as shown in a plan view in which the canopy 3 and the top folded piece 4 are broken and removed in a state where the door member 8 is opened at a predetermined angle, for example, 90 °. It functions to engage the surface to restrain further opening of the door member 8.

  By the way, in the case where the connecting member 11 is substantially a fan member as shown in the figure, and its peripheral edge also functions as an opening / closing guide that is in sliding contact with the boundary between the opening side wall 1 and the canopy 3 that is continuous therewith, the door member 8 is used. The smooth and reliable opening / closing operation can be sufficiently secured.

The opening / closing operation of the door member 8 of the packaging box 6 configured as described above is performed by first pressing and deforming a portion of the opening side wall 1 in the vicinity of the engaging protrusion 9, and the protrusion 9 and the door member 8. Under the elastic deformation of at least one of the corners 8a, the hooking protrusion 9 is inserted into the inside of the door member 8, and then the door member 8 is swung around the fulcrum, as shown in FIG. The stopper 10 can be moved to the open limit position where it comes into contact with the inner surface of the opening side wall 1.
Then, the door member 8 once opened is closed by pressing the door member 8 in the direction of the side wall opening 7 under the guidance of the connecting member 11 and bending the stopper 10 on the door member 8 as shown in FIG. In such a vertical plane, it can be performed by pushing the door member 8 to the inside of the engaging projection 9. According to this, the door member 8 is under the engagement of the protruding portion 9. Thus, the closed posture is surely maintained.

  In such a packaging box 6, the standard shape excellent in sufficiently resisting the crushing deformation of the soft packaging bag filled and packaged with the material to be packaged, which is stored in the box with the thickness of the paper material used being reduced. In order to exhibit the properties, it is preferable to provide a plurality of concave strips 12 extending in the horizontal direction on each side wall 1 in at least the lower half of the box, as shown in FIG.

Since the packaging box 6 as described above mainly functions so as to impart formability to the soft packaging bag, there is no need to laminate a resin material on the box, and therefore the packaging box 6 can be recycled. In addition, since the used paper can be used for the packaging box itself, it can contribute to resource saving and cost can be reduced.
Moreover, by bringing the door member 8 into and out of the hooking protrusion 9, it is possible to realize the reliable closing of the door member 8 and the opening including the opening as simply and as expected. .

FIG. 5 shows a state of a soft packaging bag that is used for filling and packaging of an article to be packed in the packaging structure according to the present invention and that is stored in a packaging box for use. It is a top view shown by.
In the figure, reference numeral 21 denotes a non-return dispensing nozzle. The dispensing nozzle 21 is, for example, a fused portion on the side of the soft packaging bag body 22, and the outermost sealant layer is formed on the sealant layer on the inner surface thereof. The proximal end portion is fusion bonded.
Here, the dispensing nozzle 21 includes a thermoplastic base film layer, for example, a biaxially stretched polyethylene terephthalate layer having a thickness of 5 to 20 μm, and respective sealant layers laminated on both sides of the base film layer, for example, 5 to 5 μm. A laminated film composed of an unstretched polyethylene layer having a thickness of 80 μm, preferably 20 to 100 μm, disposed on each side of the front and back, that is, a laminated film having two identical front and back profiles, As shown in the figure, a single laminated film folded back on the front and back at the center is hatched in each figure, preferably by heat sealing, in each side part except the base side, in the mutually facing posture of the inner surface side sealant layer. Are fused to each other.

  In the figure, reference numeral 23 denotes a V-shaped bent portion that replaces the tearing start flaw formed at one of the fused portions that opposes the width direction of the nozzle at the planned tearing position of the check dispensing nozzle 21. The character-shaped bent part 23 functions to facilitate tearing and removal of the nozzle tip including the tip fused part 24 of the dispensing nozzle 21. Here, the V-shaped bent portion 23 can also be formed in the fusion portion on the lower side of the figure.

  Each of the two upper and lower fused parts 25 and 26 is located opposite to the width direction of the nozzle and extends to the base end side of the dispensing nozzle 21 in the figure from the position where the V-shaped bent part 23 is formed. On the base end side, it is preferable to extend from the V-shaped bent portion 23 so as to be inclined downwardly, and the interval between the fusion portions 25 and 26 is V V from the base end portion. It is preferable to gradually decrease this toward the V-shaped bent portion 23 until the position where the character-shaped bent portion 23 is formed.

  In such a pouring nozzle 21, the V-shaped bent portion 23 serving as an unsealing portion thereof is a plan view shown in FIG. 5, and is slightly deviated toward the tip side from the position where the nozzle level becomes the highest. It is preferable that the road is positioned at a part inclined downward. According to this, after the nozzle 21 is opened and the packaged article is poured out, the packaging bag is returned to the standing posture and the pouring is stopped. In particular, the liquid breakage is improved under the action of the inclined fusion part of the lower fusion part of the nozzle 21, and dripping of the package along the lower side of the nozzle 21 is advantageously prevented. can do.

The non-return dispensing nozzle configured as described above is, for example, simultaneously with the filling and packaging of the article to be packaged into the soft packaging bag body, or prior to the filling and packaging of the article to be packaged, as shown in FIG. The sealant layer on the outer surface of the base end of the nozzle 21 is preferably fused and bonded to the inner surface of the packaging bag body 22 at the fusion part between the sealant layers on the side of the packaging bag body 22, preferably by heat sealing. It is made a part of the packaging bag, and protrudes to the side from the upper end portion of the packaging bag body 22 in the figure. Here, the packaging bag main body itself and the fused portion between the packaging bag main body 22 and the dispensing nozzle 21 are indicated by hatching in the drawing.
In order to prevent mutual sealing of the sealant layer on the inner surface of the nozzle at the time of such fusion bonding of the outer surface of the base end portion of the nozzle 21 to the packaging bag body 22, It is effective to make the melting points of the respective sealant layers on the surface different.
Here, it is preferable that the sealant layer forming the inner surface of the soft packaging bag body 22 is made of the same kind of resin material as the sealant layer on the outer surface of the nozzle in order to increase the fusion strength. Further, the base film layer of the packaging bag body can be made of the same kind as that of the nozzle 1 and can be selected from various materials having required physical properties.
In addition, when a required physical property cannot be ensured in a packaging bag only by a base film layer, it is also possible to interpose an intermediate | middle layer between a sealant layer and a base film layer.

  Such a packaging bag 5 may be in a full form as illustrated in FIG. 6 by filling and packaging the liquid article to be packed therein, preferably under deflation, but the flexible packaging bag itself. Is usually not self-supporting or fixed, so when transporting, storing, displaying, using, etc., an article to be packed into the aforementioned packaging box 6, for example, at a plurality of locations. It is stored under fixing or adhering to give self-supporting property and formability to the packaging bag.

  On the other hand, when dispensing the required amount of the packaged product to be packed, the packaging bag itself has a V-shaped portion of the non-return dispensing nozzle 21 shown in the figure, which is the upper fused portion 25. The tip portion of the nozzle 1 is removed from the bent portion 23 by tearing, for example, with fingers, and the packaging bag 5 is opened, and then the packaging bag 5 is tilted together with a box body for storing and holding it.

  Here, such a packaging bag 5 filled and packaged with an article to be packaged is attached to the inner surface side of the box 6, for example, the heat seal part at the upper end of the packaging bag body 22 is connected to each side wall of the box 6. 1 (two side walls as shown in FIG. 1) is restrained by fixing with a penetrating pin, a stapler, etc., adhering or sticking, etc. to prevent the packaging bag 5 from slipping, and a non-return dispensing nozzle 21 is fixed or fixed directly or indirectly, for example, locally, to the inner surface side of the door member 8 so that the dispensing nozzle 21 can be integrally opened and closed with the door member 8; and As shown in FIG. 1, a part of the dispensing nozzle 21 can be located by being positioned corresponding to the swing fulcrum of the door member 8.

  By the way, such attachment of the non-return dispensing nozzle 21 is performed, for example, on the inner surface side of the door member 8 on the inner surface side of the door member 8 as shown in FIG. A spacer 13 for separating the portion from the inner surface of the door member 8 is provided by bonding or the like, and this spacer 13 can be performed by fixing or fixing one surface of the nozzle 21 to the local bottom, The spacer 13 is provided with a turn 14 as shown in the figure, the turn piece 14 is turned back with the pouring nozzle 21 loosely sandwiched as shown in FIG. 8, and the turn end of the turn piece 14 is connected to the door member 8. It can also be performed by holding the non-return dispensing nozzle 21 by adhering or sticking to the inner surface.

  FIG. 9 is a main part development view showing the case where the spacer and the folded piece functioning in this way are integrally formed on the door member, and the spacer 13 shown in the figure is located at two positions on the right side of the figure of the door member 8. The right end portion of the spacer 13 in the figure is adhered to the inner surface of the door member 8 and the intended function can be exhibited. The desired function can be exhibited by holding the non-return dispensing nozzle 21 by folding downward and adhering the folded free end portion to the spacer 13 or the like.

When pouring out the packaged items in the packaging bag from the packaging structure configured as described above, first, the door member 8 of the packaging box 6 is opened to its limit position as described above. Then, the non-return dispensing nozzle 21 of the packaging bag 5 is set to an open posture as shown in FIG. 8, and the tip portion of the dispensing nozzle 21 is moved from its V-shaped bent portion 23 by fingers. Cutting off by tearing forms a tip opening in the nozzle 21.
After the packaging bag 5 is opened in this way, for example, in a state where the packaging box 6 is lifted, it is tilted as shown in FIG. By the way, the material to be packaged in this case can be poured out by specifying the nozzle position by the door member 8 and visually by the dispensing nozzle 21 protruding from the side wall 1 of the box 6. Since the level of the article to be packaged in the bag is usually located substantially below the door member 8, the article to be packaged can always flow down to the intended position.

  When such an item to be packaged is dispensed, the tip opening of the dispensing nozzle 21 that is attached to the door member 8 and protrudes from the opening side wall 1 is formed on the front and back sides by the water head pressure of the packaged item in the bag. Since it will be fully opened, the required dispensing will be performed smoothly and the flow rate by such dispensing will be secured in accordance with the decrease in the package contents in the bag. This is done by increasing the tilt angle.

  Here, the soft packaging bag 5 undergoes shrinkage deformation or crushing deformation according to the volume of the dispensed amount when such an article to be packaged is dispensed, and therefore into the packaging bag accompanying the dispense. Thus, the outside air is sufficiently prevented from entering, and the in-bag package is effectively protected against the outside air.

On the other hand, after the required amount of articles to be packaged has been poured out, the box 6 is returned to the standing posture shown by the phantom line in the drawing to stop the pouring, and along with this, the tip opening of the nozzle 21 is opened. Provides automatic close contact.
Here, as described above, this close closing of the pouring nozzle 21 is performed by releasing the pouring nozzle 21 from the hydraulic head pressure, so that the laminated films on the front and back surfaces are in the original shape when the pouring nozzle 21 is manufactured. When the objects to be packaged in the pouring nozzle flow down into the packaging bag body 22, the soft and soft films are adsorbed to each other over the entire width of the nozzle. It will be done by doing. Such close contact is more reliably maintained based on the fact that the packaging bag body 22 that has been crushed and deformed has a tendency to reduce the pressure inside the packaging bag based on the inherent elastic restoring force.
Therefore, here, based on the close contact of the nozzle 21 at the same time as the dispensing is stopped and the continuous maintenance of the close contact, the packaged items in the bag are continuously protected from the outside air from the stop of the dispensing. You can also.

  In addition, as shown in FIGS. 7, 8, and the like, the pouring of the article to be packaged from the check pouring nozzle 21 is carried out by being separated from the inner surface of the door member 8 by the action of the spacer 13. Since it is performed through the opening of the tip of the nozzle 21, the poured out packaged object does not adhere to the door member 8, and therefore, the adhered packaged object is attached to the bottom of the box 6 as the box 6 rises up and down. There is no passing down.

After finishing the required pouring as described above, the door member 8 is in a closed posture as shown in FIG. 2 where the hooking protrusion 9 is hooked on the outer surface of the door member 8 as described above. The door member 8 is completely and surely closed, and at the same time, the check pouring nozzle 21 is located at a position corresponding to the swing fulcrum of the door member 8 from the pouring position of the packaged item. For example, it will be bent approximately 90 °.
Here, this bending of the non-return pouring nozzle 21 brings about further adhesion of the films on the front and back of the pouring nozzle 21, so that after the door member 8 is closed, the outside air or the like enters the packaging bag more. In addition, it is possible to prevent the packaged item from leaking more sufficiently even when the packaging box 6 is unexpectedly laid down.

  Further, such bending deformation of the pouring nozzle 21 is performed when the pouring nozzle 21 is held with the folded piece 14 as shown in FIGS. It will be done more reliably and always properly.

It is an expanded view which shows embodiment of the packaging box. It is a perspective view which shows the assembly state of the packaging box. It is a partial fracture | rupture enlarged view which shows the accommodation aspect of a stopper and a connection member under the closure of a door member. It is a partially broken top view which shows the functional state of a stopper. It is a top view which shows a packaging bag. It is a perspective view which shows the filling packaging state of the to-be-packaged item in a packaging bag. It is an expansion perspective view which shows a spacer etc. seeing from diagonally downward. It is a figure similar to FIG. 7 which shows the holding | maintenance state of the extraction nozzle by a return piece. It is a principal part expanded view which shows the other example of formation of a stopper. It is a side view which shows the example of the extraction of a to-be-packaged object.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Side wall 2 Bottom wall structural member 3 Canopy 4 Top folding | returning piece 5 Packaging bag 6 Packaging box 7 Opening 8 Door member 8a Exit corner | corner part 9 Protrusion 10 Stopper 11 Connecting member 12 Groove 13 Spacer 14 Folding piece 21 Non-return note Outlet nozzle 22 Packaging bag body 23 V-shaped bent portion 24 Tip fusion portion 25, 26 Fusion portion

Claims (14)

While providing a door member that swings and displaces in a horizontal plane with the corner of the side wall as a fulcrum at the top of one side wall of a paper box, and fits into an opening provided on the top of the side wall, A packaging box in which a protrusion that engages with an outer surface of a door member is provided on a side wall. The packaging box according to claim 1, wherein the door member is provided with a corner portion whose contour shape is an exit angle or an entrance angle, and a protruding portion that engages with the corner portion is provided on the side wall. The packaging box according to claim 1 or 2, wherein the door member is provided with a stopper that engages with the inner surface of the side wall to restrain excessive opening of the door member. The packaging box according to claim 3, wherein the stopper is connected to the upper end of the door member via a connecting member. The packaging box according to claim 4, wherein the connecting member has a substantially fan shape and has an outer periphery, and serves as an open / close guide that slidably contacts a boundary portion between the side wall and a canopy or a top folded piece continuous thereto. The packaging box according to any one of claims 1 to 5, wherein a plurality of recesses extending in the horizontal direction are provided on each side wall at least in the lower half of the box. The packaging box according to any one of claims 1 to 6, wherein the box is made of waterproof paper. A packaging structure using the packaging box according to claim 1,
A packaging bag formed by fusing a flat non-return dispensing nozzle with a sealed tip to the upper end of a soft packaging bag body in a protruding position to the side is stored in a packaging box. A packaging structure in which a check dispensing nozzle is attached to the inner surface side of a door member, and a part of the check dispensing nozzle is positioned corresponding to a swing fulcrum of the door member. The packaging structure according to claim 8, wherein a package is filled and packaged in a packaging bag. The packaging structure according to claim 8 or 9, wherein the check dispensing nozzle is attached to the door member in a posture in which at least a tip portion thereof is separated from the inner surface of the door member. The packaging structure according to any one of claims 8 to 10, wherein the non-return dispensing nozzle is locally fixed or fixed to the inner surface side of the door member. The packaging structure according to any one of claims 8 to 10, wherein the check dispensing nozzle is held on the inner surface side of the door member. The packaging structure according to claim 12, wherein the check pouring nozzle is held by a folded piece that is integrally formed with the door member and restrains the check pouring nozzle. The packaging structure according to claim 13, wherein a folded piece is provided on a spacer member that separates the tip portion of the check dispensing nozzle from the inner surface of the door member.

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