JP2011079528A - Packaging container for fluid - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a packaging container for a fluid in which taking a spout long does not become obstacle for stacking the containers, and back leakage is prevented from occurring as the spout serves as downward tendency even when the spout in an initial stage of inclination is performed. <P>SOLUTION: The packaging container for the fluid includes: an outer box which can be assembled so as to be able to fold and to develop by using a corrugated fiberboard; and an inner bag made of a plastic film which is mounted by sticking the inner face of the outer box so as to be accompanied with folding and developing of the outer box. The packaging container is composed in such a way that a discharging opening for a content is provided by opening or non-opening shape on the outer box, and a flexible spout having a small bag-like shape and with a tip consisting of a plastic film is formed on the inner bag, and the spout is projected from the discharging opening, and the spout is held in the discharging opening so as to be able to make frequent appearances in the discharging opening. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  This invention is mainly used for transporting and storing liquids such as chemicals, paints, inks, water, foods, and sometimes powdery or granular powders, and an inner bag of cardboard and plastic film It is related with the packaging container of the fluid which consists of a combination.

  Metal and plastic containers have traditionally been used for packaging liquids, but they can be folded today because of the high cost of transportation to users and disadvantages for repetitive use and disposal. Cardboard boxes are often used. In this case, since it is necessary to prevent the liquid from leaking, it is configured as an integrated composite container in which an inner bag made of a plastic film (including a plastic sheet in this specification) is incorporated.

  The folding is based on an A-type cardboard box, and the body portion can be folded into a quadrangle, a hexagon, an octagon, etc., and the upper and lower flaps can be assembled in various shapes depending on the purpose and convenience. Moreover, even if it is a quadrangle, the means which provide the middle fold line which covers an up-and-down flap on the both right and left side walls may be taken so that the front and back both-side walls which face each other may approach and fold.

  The inner bag is desired to have a shape that fits the inner surface of the outer box, so it may be configured in a cubic shape to match the outer box, but it is often used in the form of an envelope suitable for mass production due to its robustness and cost. In this case, the inner bag is positioned on at least one pair of inner surfaces in the positioning in which the edges of the cardboard box are aligned with the opposite corners of the cardboard box or both of the folding lines so as to adapt to the folding and opening of the outer box. Glued.

  The storage and discharge of contents such as liquid may be taken in and out from an envelope-like bag mouth. However, particularly for liquid, a pouring inlet (or inlet / outlet) is provided. The structure of the outlet at this time consists of a male threaded mouth ring integrated into the inner bag and a female threaded cap that is screwed to the ring, both of which are plastic injection-molded parts, which greatly affect the distribution cost. The cost was high. Moreover, the mouth ring is attached to the side surface of the upper end portion of the inner bag, and is fixed by protruding from an opening provided in the outer box. The inventors of the present application have provided a product in which a paragraph portion is provided at one end of the upper surface of the cardboard box and an outlet cap is accommodated in the portion, and has been well received because it is convenient for stacking containers ( Patent Document 1).

JP-A-3-289436

  In the conventional fluid packaging container as described above, if the pouring inlet is provided so as to pour out from the mouthpiece of the plastic molded product, it becomes an obstacle to the stacking of the containers at that height, and a straight short bump In particular, there is a problem that the back side is liable to leak at the time of pouring at the beginning of the inclination which is directed upward from the mouth shape. In addition, there was a demand that the amount of resin should be reduced as much as possible due to ecological problems.

  In view of the above situation, the present invention does not hinder the stacking of the containers even if the inlet is taken long, and the outlet tends to be downward even at the beginning of the initial tilting. An object of the present invention is to provide a fluid packaging container in which back leakage is prevented.

  In order to solve the above-described problems, the present invention is an outer box that can be folded and assembled by corrugated cardboard, and a plastic film that is bonded to the inner surface of the outer box so as to accompany the folding and folding. The inner bag is provided with an opening or an unopened outlet for the contents, and the inner bag is formed into a small pouch-shaped flexible outlet made of a plastic film. The present invention provides a fluid packaging container characterized in that an inlet / outlet protrudes from the outlet, and the outlet is held in the outlet so as to be retractable.

  Since the fluid packaging container is configured as described above, if it is provided to the user in a folded state, the user will open the contents and put the contents from the top of the inner bag in the state where the bottom part is also assembled. The contents are transported to a further user in a packaging state in which the mouth is sealed and the upper end of the outer box is also closed. In that case, even if the pouring inlet touches another container, it is freely deformed to avoid collision. Further, the end user cuts and opens the tip of the pouring inlet drawn out from the discharge port to pour out the contents, but the pouring inlet is deformed downward by gravity even at the beginning of tilting.

  Therefore, according to the fluid packaging container of the present invention, even if a long inlet is used, there is no hindrance to the stacking of containers, and it is particularly suitable for transporting and storing liquids. Also suitable for. In addition, even when the container starts to tilt, the dispensing inlet can be surely poured downward, which not only eliminates the need to use a high-cost dispensing inlet with a cap that also hinders stacking, but also prevents liquid from leaking. There is an excellent effect that disappears.

  In addition, in the case of claim 2, the above-described effect becomes more prominent, and in the cases of claims 3 to 8, the inner bag 3 and the pouring inlet 7 having desired strength are obtained, and claim 9 In this case, the pouring inlet and the bag portion in the vicinity thereof are conveniently stabilized, and the contents can be poured out completely and safely.

As mentioned above, when the effect of the present invention is summarized,
1. Caps and flanges can be substituted because the injection port can be generated by convex molding.
2. The thickness of the convex shaped portion is increased, the pouring inlet is stabilized, and the pouring convenience is improved.
3. Since the convex thickness is increased by the stacked film inner bags, the pouring inlet is stabilized, and even if there is a pinhole in one inner bag, leakage can be prevented by other inner bags.
4). Since nylon has stable crystals, it can be molded uniformly and stably when stretched.
5). It is possible to make a structure in which a notch for pushing a hand into the outer box is made, a hole is formed, and a convex shape is pulled out. Moreover, it can be easily taken out even when the outer box is flat.

  In addition, in recent years I. B (back-in box) is widely used in the market as a container for liquids and powders, but demand for small-sized packs (with an internal capacity of about 2 kg to 5 kg) is increasing. These are often used up and used, so if you have a cap or flange, it will not only increase the cost, but it will result in overpacking, so it was developed in response to the desire to make an environmentally friendly container. . Without using a cap or flange, heat can be applied to a convex mold, and the film can be stretched to create a spout inlet, which can greatly reduce the amount of resin in the cap and flange, and at the same time can be sealed after filling. It is easy to pour out and can be expected to grow in the future as an eco-box.

It is a perspective view which shows the packaging container of the fluid of the discharge port opening type which concerns on one Example of this invention in the cover open state at the time of the contents filling. It is a perspective view which shows the packaging state of the contents by closing the lid of the packaging container of the same fluid. It is the schematic longitudinal cross-sectional view seen from the front in the packing state. It is an expanded view of the outer box of the packaging container of the fluid. FIG. 5 is an enlarged plan view showing the inner bag in which part A of FIG. It is a perspective view which shows the packaging container of the fluid of a discharge port unopened type which concerns on another Example in the cover open state at the time of filling of the contents. It is a perspective view which shows the discharge port opening state in a (circle) frame while closing the lid | cover of the packaging container of the same fluid, and showing the packaging state of the contents. It is a schematic longitudinal cross-sectional view which shows the state which closed the lid | cover of the same fluid packaging container, opened the discharge outlet in the packaging state of the contents (refer to the inside of the circle in FIG. 7), and then made the unopened inlet / outlet 7 protrude.

  In this invention, the fluid packaging container is composed of an outer box 1 and an inner bag 3. Of these, the outer box 1 can be folded by an A-type cardboard box or a cardboard box based on that type. It has a quadrilateral, hexagonal, octagonal, etc. shape. Further, the assembly structure of the bottom part and the cover part also varies. The embodiment described later is a case where an inclined wall 19 is provided for the protrusion of the unopened inlet / outlet 7 at the upper end on the basis of a quadrangle to enhance convenience, and the lid portion has a special structure. In addition, it is not contrary to the gist of the present invention to provide a folding line by providing a folding line on both opposing walls of a quadrangle. Cardboard includes cardboard.

  The inner bag 3 includes polyethylene, polypropylene, nylon, nylon composite, nylon PE, and the like as the film material, and various other materials are appropriately selected according to the application, usage form, and the like. In particular, nylon and nylon / polyethylene composite films are preferred because the crystals are stable, and the inlet (convex portion) is formed uniformly and stably. For example, if the unopened inlet / outlet 7 is formed by stretching, a heat-weldable film is selected to heat-seal the stretchable film and the opening 8 of the inner bag 3. In addition, the unopened inlet / outlet port 7 may be formed of another plastic film or sheet and bonded to the inner bag 3 to form an attachment type.

  The outlet 5 provided in the outer box 1 may be opened from the beginning so that the contents can be poured out quickly (Example 1), or an unexpected situation may occur during transportation. In order not to invite, it may be formed unopened so that it can be opened later (Example 2).

  When the discharge port 5 is formed to be convex by stretching a film, if the portion becomes thin and the strength may be insufficient, the film is reinforced and stretched by attaching another film. Further, it is possible to take a means for making the inner bag 3 have a double structure by laminating films.

  The corrugated cardboard constituting the outer box 1 is mainly a single-layer cardboard or a double-layer cardboard, and is a plastic cardboard, a paper board or the like, and a double-layer cardboard is particularly preferable. Moreover, the outer box 1 can employ | adopt A type | formula or A type | formula folding type | formula.

  The inner bag 3 is not particularly limited, such as a laminate film containing nylon, nylon / polyethylene, PET, and aluminum foil, or a composite film or functional film thereof. Particularly preferred is a laminate film of nylon / polyethylene or nylon / polypropylene. In particular, nylon 6 is more preferable because it is inexpensive.

  The fluid packaging container is composed of a combination of an outer box 1 of a cardboard box and an inner bag 3 accommodated in the outer box 1 so as to adapt to folding and opening of the outer box 1, and a liquid discharge port 5 is provided in the outer box 1, The inner bag 3 is formed with an unopened inlet / outlet 7 that swells from the discharge port 5 in a small bag shape. However, the unopened inlet / outlet 7 may be retracted and retracted.

  In this embodiment, the outer case 1 has a body portion 9 formed of vertical broken lines 10, 10, 10, and 10 so that the front and rear side walls 11 and 11 and the left and right side walls 13 and 14 that are narrower than the front and rear side walls 13 and 14 and the glue margin 16 at one end. Are assembled into a rectangular rectangular tube that is long to the left and right, but an inclined wall 19 is provided in a square shape at the upper part of one side end, and the inner bag 3 is not opened in the center of the inclined wall 19. The discharge port 5 through which the doorway 7 projects is formed.

  In order to form the inclined corner portion, when viewed in a developed view, the side wall 14 on the side is formed low, the inclined wall 19 is continuously provided via the low broken line 17, and the inner flap 21 is further provided continuously therewith. . Further, the double-sided walls 11, 11 are provided with folding pieces 25, 25 via inclined folding lines 23, 23, and the folding pieces 25, 25 are short so as to hold the inner bag 3 near the mouth lightly. At the same time, the protruding ends are formed on curved arc edges 26 and 26 surrounding the discharge port 5.

  On the other side wall 13, an inner flap 22 that projects against the inner flap 21 protrudes, and a dovetail notch 27 is formed on the inner flap 21, and a dovetail projecting piece 28 that fits on the inner flap 22 is formed. It is. This connection also ensures the stability of the inclined wall 19.

  Outer flaps 29, 30 that fold up and down are projected from the upper ends of the double-side walls 11, 11, an engagement piece 31 is projected from the tip of the lower outer flap 29, and the lower end of the other outer flap 30 is A retaining hole 33 into which it is inserted is provided. This maintains the double outer flap structure.

  As for the bottom portion, specially shaped flaps 35, 36, 37, and 38 are projected from the lower ends of the face walls 11 and 11 and the side walls 13 and 14 so that the bottom portions are configured by being held together. Since the structure of incorporation and deassembly varies, the details are omitted.

  The inner bag 3 is an envelope-shaped flat bag made of a polyester film. When viewed as a flat bag, the inner bag 3 is a double film 3a, 3b that is folded in half at both end edges 41, 41. The outer case 1 is assembled while adhering to the double-sided walls 11 and 11 (or each wall) in a state where both end edges 41 and 41 are along the bent lines 10 and 10 (see FIGS. 4 and 5).

  At the location of the film 3a where the inner bag 3 hits the inclined wall 19, an unopened inlet / outlet port 7 that bulges outward in the form of a small bag is formed at the center of the location by stretching the film. A retaining ring 43 reinforced with a double film (or a thick plastic sheet) is adhered to the inner surface around the inner surface, and the film 3 a is adhered to the inner surface of the inclined wall 19 together with the retaining ring 43.

  FIG. 1 shows a state in which contents are put into a fluid packaging container, and the upper end of the inner bag 3 is wide open when the inner flaps 21 and 22, the outer flaps 29 and 30, and the inclined wall 19 are opened. Therefore, after the contents have been charged, the sealed portion is placed in the outer box 1 with the mouth sealed, and both the inner flaps 21 and 22 are closed while the inclined walls 19 are brought down together with the folding pieces 25 and 25. The outer flaps 29 and 30 are closed and packaged thereon (FIG. 2). The important points can be stopped with adhesive tape.

  In the case of this embodiment, since the unopened inlet / outlet 7 swells in a small bag shape protrudes from the inclined wall 19 as described above, it can be stacked without touching the top and side containers. In order to take out the contents at the transport destination, the tip of the unopened inlet / outlet 7 that swells in a small bag shape is twisted and picked off with a scissors (above the line AA in FIG. 3) and opened, and the container is tilted. However, since the pouring inlet is deformed downward, there is no back leakage, and finally, if the part of the inclined wall 19 is turned over and tilted so that it becomes the lower surface, it becomes a narrow bottom. Since the contents are concentrated and the concentration is ensured even by tightening with both folded pieces 25, 25, the contents can be completely taken out to the last drop.

  In the above embodiment, an inclined wall is formed, and the discharge port according to the present invention is provided on the inclined wall. However, the discharge port is not limited to this example, and is normally (cuboid shape). It goes without saying that it may be provided at an appropriate position such as the top wall or side wall or bottom wall of the outer box.

  This is an example in which the outer box 1 is rectangular and the discharge port 50 is not opened in the outer flap 51 constituting the top wall of the upper surface. The unopened inlet / outlet 7 is provided under the outer flap 51. Is face down.

  The outer box 1 has substantially the same structure as a general A-type cardboard box, and front and rear inner flaps 49 and 49 and left and right outer flaps 51 and 51 are respectively provided at the upper ends (FIG. 6). However, since the unopened discharge port 50 is provided in one outer flap 51 and the unopened inlet / outlet 7 is faced down so as to be able to project, the both inner flaps 49 and 49 are connected to each other. Notches 53 and 53 are provided so as not to be an obstacle. Note that the concept is the same in the case of the above-described embodiment in which the discharge port 5 has an opening shape, and a notch is required.

  The notches 53 and 53 are formed simply by taking a large angle at one end of the inner flaps 49 and 49, in this case. Therefore, the film of the inner bag 3 is joined under the outer flap 51 between the inclined edges of both the notches 53, 53, and the unopened inlet / outlet 7 is held under the unopened discharge port 50 at the center of that portion. As a holding means, a retaining ring 55 is adhered to the inner side of the film of the inner bag 3, and the portion is adhered to the inner surface of the outer flap 51. This part is made peelable at least in the upper half. The reason is the structure for opening the unopened outlet 50 as follows.

  With respect to the shape of the unopened discharge port 50, a circular removal wall portion 57 serving as an opening of the discharge port 50 is formed in the center portion of the outer flap 51 by the main cut 60, and a pair of left and right sub cuts are provided above it. 61 and 61 were formed, and the space between them was formed as the wall portion 58. Further, a fold line 63 is formed at a position connecting the tips of both the sub-cuts 61 and 61.

  The main cut 60 and the sub cut 61 are cuts corresponding to the one-dot chain line in the drawing, and can be disconnected because they are partially connected. In addition, the folding line 63 is a broken line having a large interval, and the connection is maintained even by pressing down with a finger or the like. Therefore, first, the removal wall portion 57 is pushed with a finger, and the finger is pushed in to lift the removal wall portion 57 (see the inside of the circle in FIG. 7), so that the discharge port 5 can be opened.

  Since the retaining ring 55 is located below the dropping wall portion 58, the retaining ring 55 is partly peeled off. However, depending on the size and shape of the retaining ring 55, if it falls off the bottom of the wall portion 58, it will not be peeled off. In any case, since the unopened inlet / outlet 7 is exposed by the retaining ring 55 to the discharge port 5, the contents can be poured out by picking it up and cutting the tip.

DESCRIPTION OF SYMBOLS 1 Outer box 3 Inner bag 3a, 3b Film 5 Discharge port 7 Unopened inlet / outlet port 10 Folding line 19 Inclined wall 21, 22 Inner flap 23 Inclined bent line 25 Folding piece 26 Arc edge 27 Notch 28 Protruding piece 29, 30 Outer flap 31 Engagement piece 33 retaining hole 41 edge 43 retaining ring 49 inner flap 50 unopened outlet 51 outer flap 53 notch 55 retaining ring 57 removal wall part 58 drop wall part 60 main cut 61 sub cut 63 fold line

Claims (11)

  It consists of an outer box that can be folded and unfolded with cardboard, and an inner bag made of plastic film that is attached to the inner surface of the outer box so as to accompany the folding and unfolding. A discharge port is opened or provided in an unopened shape, and the inner bag is formed into a small bag shape and the tip is formed of a flexible outlet made of a plastic film, the outlet is protruded from the outlet, and the outlet is A fluid packaging container configured to be capable of appearing and retracting at a discharge port.   The discharge port of the outer box has an unopened shape on the corrugated cardboard wall, and the removal wall portion for opening the discharge port at the corresponding position on the corrugated cardboard is formed so as to be able to be cut off by a chain line-shaped main cut. The drop wall part for opening a finger hooking hole on the outside of the removal wall part is provided with a sub-cut connected to the main cut so that the wall part can be pulled up by a finger hook. Fluid packaging container.   3. The fluid packaging container according to claim 1, wherein the pouring inlet is formed in a convex shape by extending a part of the inner bag of the film.   3. The fluid packaging container according to claim 1, wherein the pouring inlet is formed in a convex shape by overlapping a reinforcing film on a part of the inner bag of the film and stretching the film together.   The fluid packaging container according to claim 1 or 2, wherein a part of the inner bag made of a film in which a plurality of the pouring inlets are stacked is stretched and formed into a convex shape.   3. The fluid packaging container according to claim 1, wherein the inner film of the inner bag is a polyethylene / nylon laminate film, and the outer film is a nylon / polyethylene laminate film or a nylon / polypropylene laminate film.   6. The fluid packaging container according to claim 1, wherein the inner bag or / and the reinforcing film is a film formed of a resin containing nylon.   The outer box is folded in the form of a quadrangular cylinder, and the inner bag is bonded to the inner surface by positioning the edges of the double-sided polygonal line. At the side end, an inclined wall is provided at the upper end of the side wall on the same side, while a fold line having the same inclination is provided at the upper end of both front and rear side walls, and a folding piece for receiving the inclined wall is projected through the inclined fold line. In addition, an internal flap that mutually abuts the upper end of the other side wall and the upper end of the inclined wall is provided continuously, and a notch and a projecting piece that are mutually coupled to the abutting end are formed, and the upper end of the double-sided wall is formed. Has an outer flap that overlaps with each other on the inner flap, and a latching hole is drilled at the lower end of one outer flap and is inserted into the latching hole at the tip of the other outer flap. The engagement piece is provided so as to project. Or 7 packaging container of the fluid description.   The inner bag outlet is formed by stretching so as to extrude a part of the plastic film fabric of the inner bag, and the retaining means is a ring-shaped retaining ring on the back side of the inner periphery of the outlet. Adhering, bonding the inner bag film around the discharge port of the outer box under the retaining ring, and forming an arc edge that lightly presses both sides of the retaining ring at both ends of the folded pieces 9. A fluid packaging container according to claim 1, 2, 3, 4, 5, 6, 7 or 8.   10. A fluid outlet according to claim 1, 2, 3, 4, 5, 6, 7, 8 or 9, characterized in that the outer box is provided with a discharge port positioned so that the outlet of the inner bag can be taken out. Packaging container. 11. The fluid packaging container according to claim 10, wherein the positioning is such that the pouring inlet can be exposed to the outside by pushing the outer box at the positioning position with a finger.

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