JP3288141B2 - Bag in carton - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bag-in-carton (hereinafter referred to as "BIC") having an inner bag attached to the inner surface of a carton.
About.

[0002]

2. Description of the Related Art Conventionally, BIC has been used as a liquid packaging container. Normally, the BIC carton has a rectangular parallelepiped shape, and the inner bag is attached to the inner surface of four sides of the carton. This BIC is generally used for low-viscosity liquid packaging of juice, sake, etc., and when the contents are taken out, as the contents are discharged, air corresponding to the discharged amount enters the BIC. Was treated like so.

[0003]

SUMMARY OF THE INVENTION
Focusing on the low cost of IC and the reliability of liquid packaging, the use of this for high viscosity liquid packaging such as ink was studied. However, in the case of a high-viscosity liquid, it is necessary to suction from the spout when taking out, and at that time, it is difficult to put air into the inner bag, so that the volume of the inner bag is reduced according to the removal of the contents. It needed to be deformed.
For this reason, in the conventional BIC in which the inner bag is attached to the four sides of the carton, the inner bag cannot be deformed when the contents are taken out, and as a result, it can be used as it is for packaging a high viscosity liquid as it is. Did not. In addition, not only high-viscosity liquids, but also when liquids that do not want to come into contact with air are added, it is necessary to deform the inner bag when taking out the contents,
Again, the conventional BIC could not be used.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and has as its object to provide a BIC which can be suitably used for packaging high-viscosity liquids such as inks and liquids which do not want to come into contact with air. .

[0005]

Means for Solving the Problems In order to achieve the above object, the first invention of the present application comprises a rectangular flat front face, flat side faces on both sides thereof, and flat top and bottom faces above and below. A carton having side flaps rotatable around the upper and lower ends of the front surface inside the top surface and the bottom surface, an inner bag accommodated inside the carton, and a front surface of the carton, A spout attached to communicate with the inner bag, wherein the inner bag has a trapezoidal shape having, on both sides of the carton, a bottom near the front edge of the side and a top near the center. And is also affixed to at least the side flap close to the spout out of the side flaps located inside the top and bottom surfaces of the carton. Bags characterized by the following: The gist of the Nkaton.

In the second invention of the present application, a carton having a rectangular flat front surface, flat side surfaces on both sides, flat top and bottom surfaces above and below the flat front surface, and a carton having a flat top surface and a bottom surface disposed above and below the carton. An inner bag, and a spout attached to the front of the carton so as to communicate with the inner bag, wherein the inner bag is restrained by the carton so that about half of the side to which the spout is attached is attached. The inner bag seals both ends of the cylindrical film formed into a rectangular tube, and seals the bottom portion of the triangular flap formed on both sides of the both ends. The gist of the present invention is a bag-in-carton characterized by having such a configuration.

[0007]

The bag-in-carton or BIC according to the first aspect of the present invention has a structure in which an inner bag is attached to the inner surface of the carton, and can be manufactured at a low cost similarly to the conventional BIC. At the time of use, about half of the inner bag on the side opposite to the spout side is freely movable, so as the contents are removed from the spout by suction or the like, the movable part can be used. (Hereinafter referred to as a movable portion) is deformed, the inner volume of the inner bag can be reduced, and the contents can be taken out without putting air into the inner bag. And ultimately,
The movable portion of the inner bag fits into about a half portion (hereinafter referred to as a fixed portion) attached to the inner surface of the carton, and almost all the contents can be taken out.
Here, since the trapezoidal region of the inner bag is constrained with respect to both sides of the carton, the upper and lower parts can be moved, and the volume of the inner bag is made extremely small as the contents are sucked out. Remaining amount can be reduced. At that time, of the movable upper and lower parts of the inner bag, the side near the spout is attached to the side flap, so it will move slowly with the side flap, and the inner bag There is no blocking. For this reason, the amount of contents to be taken out can be stabilized, and the remaining amount of contents in a large number of BICs can be made uniform.

In the BIC according to the second aspect of the present invention, since the bottom portions of the triangular flaps formed on both sides of the upper and lower ends of the inner bag are sealed, the contents are not trapped in the triangular flap portions. In addition, the remaining amount of the contents can be reduced, and the sealing portion also serves to keep the inner bag in a substantially rectangular parallelepiped shape. When the contents are sucked out, the entire inner bag is deformed neatly. The amount can be small and uniform.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below.

FIG. 1 shows a schematic cross section of a BIC according to an embodiment of the present invention.
(B) shows a state where the contents are sucked out. FIG. 2A is a schematic perspective view of the BIC, and FIG.
It is a schematic perspective view which shows C with the bottom face up. 1 and 2, a BIC generally denoted by reference numeral 1 has a carton 2 constituting an outer container and a deformable inner bag 3 housed therein. A liquid 4 such as ink is stored.

The carton 2 has a flat rectangular front surface 2a.
It has a rectangular parallelepiped shape having flat side surfaces 2b and 2c on both sides thereof, flat upper and lower surfaces 2d and 2e, and a rear surface 2f on the rear side. This carton 2 is assembled from a carton blank 2 'shown in FIG.
The front surface 2a, the side surfaces 2b, 2c, and the back surface 2f are panels 2a ', 2b', 2c ', 2 of the carton blank 2', respectively.
f ', and the top surface 2d and the bottom surface 2e are respectively constituted by the main flaps 2d' and 2e 'of the carton blank 2'. Further, the carton blank 2 'is provided with side flaps 2g, 2h above and below a panel 2a' constituting the front surface 2a of the carton 2, and the side flaps 2g, 2h are, as shown in FIG. Top 2
d and the inside of the bottom surface 2e without being adhered to the top surface and the bottom surface. Therefore, the side flaps 2g and 2h are rotatable around the upper and lower ends of the front surface 2a.

At the lower end of the front surface 2a of the carton 2, an inner bag 3 is provided.
The spout 5 is attached so as to communicate with the spout, and is closed by the cap 6. The spout 5 has a tubular portion 5a extending into the inner bag 3, and a groove-like passage 5b for allowing liquid to pass through is formed on a side surface of the tubular portion 5a. By forming this passage 5b, the contents 4 can be sucked into the spout 5 even if the tip of the tubular portion 5a is closed by the inner bag 3.

The inner bag 3 is partially attached to the inner surface of the carton 2 and is fixed so as not to move. Here, the portion of the inner bag 3 fixed to the carton 2, that is, the fixed portion is a region shown by oblique lines with broken lines in FIGS. 1 and 2. That is, the fixed portion of the inner bag 3 to the carton 2 includes a portion 9a of substantially the entire area of the carton front surface 2a and the side surface 2a.
The trapezoidal portions 9b and 9c have a bottom near the front side edge of each of b and 2c and a top near the center. Furthermore, inner bag 3
The part 9d of the portion facing the side flap 2h on the side close to the spout 5 is fixed to the side flap 2h. Thus, the inner bag 5 is fixed to the inner surface of the carton 2 at the portions 9a, 9b, 9c, and that portion does not move, but the other portion (therefore, about a half portion of the inner bag 3 on the side opposite to the spout side). It is movable and is a movable part. The portion of the inner bag 3 facing the side flap 2h is fixed to the side flap 2h.
Since h can rotate around the lower end of the front surface 2a, it can move together with the side flap 2h.

Next, a method of manufacturing the BIC 1 having the above configuration will be described. First, a carton blank 2 'having the shape shown in FIG.
In parallel with this, a film is attached to the tube (sealing the back), and the film is cut into a predetermined length to form a cylindrical film 3 '(the upper and lower ends are sealed in a later step to form an inner bag). Create The tubular film 3 'is not limited to the back-sealed film as shown in the figure, but may be a film formed by stacking two films and sealing both sides thereof.

Next, portions 9a ', 9b', 9c ', 9e' of the inner surface of the carton blank 2 'shown by oblique lines.
(E.g., emulsion glue), and a tubular film 3 'is attached to the glue-applied portions 9a' and 9b 'as shown in FIG. Next, as shown in FIG. 4B, the panels 2c 'and 2f' are folded and attached to the body, and the panel 2c 'is attached to the cylindrical film 3'. As described above, a flat BIC 1 'before assembly is formed.

Next, the flat BIC 1 'is sent to an assembling and filling process, where it is raised into a prismatic shape, and after a spout mounting portion is punched, a spout 5 is mounted. Thereafter, the lower end of the cylindrical film 3 'is sealed and closed. This closing operation is performed as shown in FIG. 5 (in FIG. 5, cartons are omitted for clarity of the drawing). That is, as shown in FIG. 5 (a), the end of the cylindrical film 3 'opened in the shape of a square tube is
As shown in (b), the first seal portion 10 is formed by closing the end and sealing the end horizontally. Then, this part is shown in FIG.
As shown in FIG. 1C, the triangular flaps 11 are formed on both sides by pressing flat, and the bottom portion is sealed to form the second seal portion 12. Then, the triangle flap 11 is
Fold it inward as shown in (d). Thereby, the end of the cylindrical film 3 'is sealed and assembled into a box shape. Here, since the second seal portion 12 is formed at the bottom portion of the triangular flap 11, the contents are contained and confined in the triangular flap 11, so that the remaining amount does not increase. Further, since the second seal portion 12 has a reinforcing effect, it also serves to keep the inner bag 3 in a substantially rectangular parallelepiped shape, and it is possible to cleanly deform the entire inner bag when sucking out the contents.

After the lower end of the cylindrical film 3 'is sealed and assembled, the bottom of the carton blank 2' is assembled. At this time, the bottom portion of the inner bag 3 is attached to a portion 9d (see FIG. 2) of the side flap 2h located inside the bottom surface of the carton 2 by an appropriate adhesive means (for example, hot melt adhesive).

Then, after the upper end of the cylindrical film 3 'is sealed in the same procedure as the lower end, the carton blank 2'
Is assembled, and the BIC 1 containing the inner bag 3 in the carton 2 is assembled. In addition, these steps are:
Since the present invention can be implemented by applying a conventional BIC manufacturing technique, description of manufacturing equipment and the like is omitted. Finally,
After bleeding the air in the inner bag 3 from the spout 5, the contents 4 such as ink are filled, and the state shown in FIG.

When the BIC 1 filled with the contents 4 is used, as shown in FIGS. 1 (a) and 1 (b), the BIC 1 is set on a printing machine or the like with the BIC 1 almost upright, and the spout 5 is sucked by a suction device ( (Not shown), and the contents 4 are sucked through the spout 5. At this time, since about half of the inner bag 3 on the side opposite to the spout side is a movable part that is not restrained by the carton 2, the movable part moves as shown in FIG. ), The contents are taken out as shown by the two-dot chain lines 15a, 15b, 15c, etc., and the contents are taken out without putting air into the inner bag. Eventually, the movable portion of the inner bag 3 will be in a state where it will fit into the approximately half fixed portion attached to the inner surface of the carton, and almost all the contents will be taken out.

Here, the fixing portions 9b and 9c for fixing the inner bag 3 to the side surfaces 2b and 2c of the carton 2 are trapezoidal portions having the bottom near the side edge on the front side. The upper and lower portions (including the upper surface and the bottom surface of the inner bag) are movable. Therefore, when the contents 4 are sucked, the upper surface and the bottom surface of the inner bag 3 are also moved as shown in FIG. The inner bag 3 moves so as to be inclined inward, so that the inner volume of the inner bag 3 can be further reduced, and the remaining amount can be reduced. In particular, as a result of the bottom surface of the inner bag 3 being lifted, the contents that easily accumulate on the bottom portion of the inner bag 3 are better sucked out, and the remaining amount can be reduced. Further, since the bottom surface of the inner bag 3 is fixed to the side flap 2h, the inner bag 3 is kept almost flat by the side flap 2h and moves together with the side flap 2h. Therefore, before the contents are sufficiently sucked out, the bottom portion of the inner bag 3 is not deformed and the spout 5 is closed, so that the contents can be stably sucked out and the remaining amount between the products can be reduced. Can be reduced. Here, a trapezoidal fixing portion 9 for the side surfaces 2b, 2c of the carton 2
The inclination angles α and β (see FIGS. 1 and 2) of the oblique sides of b and 9c are preferably about 10 to 25 °, and the upper inclination angle α is about 15 to 20 ° and the lower inclination angle is about 15 to 20 °. Angle of inclination β
Is preferably selected to be about 10 to 15 °.

A BIC 1 of this embodiment was used as an ink container containing 500 g, and a suction test was conducted on many ink containers. As a result, the remaining amount was about 12 g on average, and at most 16 g.
g, and it was confirmed that the contents could be stably sucked out. On the other hand, when the bottom surface of the inner bag 3 is freely movable without being attached to the side flap 2h, the remaining amount is about 15 g on average, and the remaining amount is extremely large (for example, 70 to 80 g). ) Sometimes occurred. When the inner bag 3 is not fixed to the side surfaces 2b and 2c of the carton 2 in a trapezoidal shape, but is fixed to the entire area on the half of the spout side, the remaining amount becomes as large as 20 to 30 g. A large amount (for example, about 100 g) sometimes occurred. Therefore, by adopting the configuration of the present embodiment, the remaining amount can be reduced and the variation can be reduced.

In the above embodiment, the inner bag 3 is made up of a portion 9a of substantially the entire front surface 2a of the carton 2 and both side surfaces 2b, 2c.
As shown in FIG. 3, glue is applied to the entire area of the carton blank 2 'corresponding to the trapezoidal portions 9b and 9c, and the inner bag 3 is attached to the entire area. However, the present invention is not limited to this configuration, and the portions 9a, 9b,
The portion of the inner bag corresponding to 9c only needs to be constrained by the carton, and therefore, the peripheral portions of the portions 9a, 9b, 9c may be stuck in a dotted or linear manner.
In the above-described embodiment, the spout 5 is provided with the cylindrical portion 5a extending into the inner bag 3, but the spout 5 is not limited to this configuration, and is a normal spout having no cylindrical portion. May be used.

Further, in the above-described embodiment, the case has been described in which the BIC 1 is set upright on the machine when the contents are taken out, and the contents are sucked out from the spout provided at the lower end of the front surface. The removal is not limited to being performed in this state, but can be appropriately changed according to the machine on which the BIC is set. For example, the contents may be sucked out by setting the machine with the front face down and the spout facing downward. In this case, the mounting position of the spout does not need to be provided at the lower end of the front surface as in the illustrated embodiment, but may be provided at any position on the front surface.

[0024]

As described above, the BIC of the first invention of the present application has a carton blank on which a tubular film constituting an inner bag is attached, and a carton blank is attached on a body,
Thereafter, the upper and lower ends of the tubular film are sealed, and the bottom and top of the carton blank can be formed by assembling. Therefore, it can be manufactured at a low cost similarly to the conventionally used BIC. Due to the heavy structure,
The contents can be reliably protected. Moreover, in the present invention, the inner bag in the carton is stuck in a trapezoidal shape on both sides of the front surface to which the spout is attached, and is also stuck to the side flap near the spout. ,
The movable portion of the inner bag deforms stably in response to the suction of the contents, and can fit into the fixed portion of the inner bag, so that most of the contents are stably It can be sucked out and the remaining amount can be reduced and made uniform. Thus, the BIC of the present invention can be suitably used as a packaging container for high-viscosity liquids or liquids that do not want to be exposed to air.

In the BIC according to the second aspect of the present invention, since the bottom portions of the triangular flaps formed on both sides of the upper and lower ends of the inner bag provided in the carton are sealed, the contents are stored in the triangular flap portions. Eliminating being trapped inside, you can reduce the remaining amount of contents,
The sealing part also plays a role of keeping the inner bag in a substantially rectangular parallelepiped shape, and the whole inner bag is deformed cleanly when sucking out the contents,
From this point as well, the remaining amount of contents can be reduced and made uniform. Thus, the BIC can also be suitably used as a packaging container for high-viscosity liquids or liquids that do not like to be exposed to air.

[Brief description of the drawings]

FIG. 1 shows a BIC according to an embodiment of the present invention.
(A) is a schematic sectional view showing a state where the contents are filled, and (b) is a schematic sectional view showing a state where the contents are sucked out.

FIG. 2A is a schematic perspective view of the BIC, and FIG. 2B is a schematic perspective view showing the BIC with the bottom face up.

FIG. 3 is a schematic plan view showing a carton blank and a film attached to a cylinder for manufacturing the BIC of the above embodiment.

FIGS. 4A and 4B are schematic plan views showing a carton blank and a film affixed to a cylinder in the middle of a BIC manufacturing process.

FIG. 5 (a), (b), (c), (d)
Schematic perspective view showing a state in which the end of the inner bag is sealed and assembled.

[Explanation of symbols]

 Reference Signs List 1 BIC 2 Carton 2a Front surface 2b, 2c Side surface 2d Top surface 2e Bottom surface 2g, 2h Side flap 2 'Carton blank 3 Inner bag 4 Contents 5 Spout 9a, 9b, 9c, 9d Part to fix inner bag 10 First seal Part 11 Triangular flap 12 Second seal part

Claims (2)

(57) [Claims] 1. A flat front surface having a rectangular shape, flat side surfaces on both sides thereof, and flat top and bottom surfaces above and below the front surface, and the upper and lower ends of the front surface are centered inside the top surface and the bottom surface. A carton provided with a rotatable side flap, an inner bag accommodated in the carton, and a spout attached to a front surface of the carton so as to communicate with the inner bag; The bag is affixed to both sides of the carton so as to be restrained by a trapezoidal portion having a bottom near the front edge of the side of the side and a top near the center,
Further, of the side flaps located inside the top and bottom surfaces of the carton, the bag flap is also attached to at least the side flap near the spout. 2. A carton having a rectangular flat front surface, flat side surfaces on both sides thereof, upper and lower flat top surfaces and a bottom surface, an inner bag accommodated inside the carton, On the front surface, there is a spout attached to communicate with the inner bag, and the inner bag is attached to the inner surface of the carton such that about half of the side to which the spout is attached is restrained by the carton. Further, the inner bag is configured to seal both ends of a tubular film formed into a square tubular shape and seal a bottom portion of a triangular flap formed on both sides of the both ends. And bag in carton.