JP3059989U - Outer box for bag-in-box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an outer box for a bag-in-box which can be easily manufactured, has excellent strength, and does not expose the cross section of a corrugated cardboard sheet to inside, thereby preventing damage to an inner bag during transportation or the like. obtain. SOLUTION: A cardboard outer box and a cardboard inner cylinder housed in the outer box are provided, and the outer box is connected to a side wall and a connecting piece connected in one direction through a ruled line, and is connected to upper and lower sides of each side wall. The inner cylinder is formed from a blank sheet having a top flap and a bottom flap, and the inner cylinder is formed by joining the end faces of one or more rectangular blank sheets into an octagonal cylindrical shape and bonded to the inner surface of the side wall of the outer box. Exterior box for in-box.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to an outer box for a bag-in-box particularly suitable for a bag-in-box used for transporting liquids and the like.

[0002]

[Prior art]

 Conventionally, as a container for beverages, liquid seasonings, adhesives, detergents, and other fluid articles, a so-called bag-in-box, which is a composite container using cardboard as an outer layer and a soft synthetic resin container or bag as an inner layer, is known. ing. Above all, a simple cardboard box, a so-called A-type box, can be used as the outer box, and the outer box is combined with a separate cylindrical frame, assuming that the corrugated board area is relatively small. Things exist. Examples thereof are those disclosed in Japanese Utility Model Laid-Open No. 53-20232 (FIG. 6) and Japanese Patent Application Laid-Open No. 8-282735 (FIG. 7).

[0003]

[Problems to be solved by the invention]

 However, the outer box for a bag-in-box as disclosed in Japanese Utility Model Laid-Open No. 53-20232 has the following problems. That is, since the inner cylinder and the outer box are not bonded, the inner cylinder is distorted due to the internal pressure of the liquid inside or the vibration during transportation, causing a problem in strength. In the case of an outer box for a bag-in-box as disclosed in JP-A-8-282735, there is a step inside the formed inner cylinder, and the cross section of the cardboard sheet is exposed inside. However, due to vibrations during transportation, the inner bag was damaged and the contents leaked.

[0004]

[Means for Solving the Problems]

 The present invention has the following configuration in order to solve the above-mentioned problem. That is, the present invention comprises an outer box made of corrugated cardboard and an inner cylinder made of corrugated cardboard housed in the outer box. The outer box has side walls and connecting pieces connected in one direction through ruled lines, and upper and lower sides of each side wall. Is formed from a blank sheet having a top flap and a bottom flap connected to the inner cylinder, and the inner cylinder is formed by abutting the end faces of one or more rectangular blank sheets into an octagonal cylindrical shape and adhered to the inner surface of the side wall of the outer box. This is an outer box for a bag-in-box.

[0005] By adopting such a configuration, the outer box for a bag-in-box according to the present invention has a simple shape in which the most common type A box among cardboard boxes can be used. In addition, there is little distortion in the inner cylinder, and there is no risk of damage to the inner bag due to vibration during transportation when a soft synthetic resin container or bag is used as a bag-in-box in combination.

[0006]

[Embodiment of the invention]

 The present invention will be described in detail with reference to the drawings of one embodiment. FIG. 1 is a perspective view of the present invention during assembly, FIG. 2 is a developed view of an outer case A of the present invention, FIG. 3 is a developed view of an inner cylinder B of the present invention, and FIG. FIG. FIG. 5 is a schematic cross-sectional view of a trunk portion according to another embodiment of the present invention.

As shown in FIG. 1, the outer box for a bag-in-box according to the present invention is formed by bonding a side plate 8 parallel to the side wall of the outer box A with an inner cylinder side plate to the inner surface of the side wall of the outer box A. The inner cylinder is mounted so that the side plate 9 forms a triangular prism-shaped space at the corner of the outer box A. To form a bag-in box, the inner bag C to which the spout 10 for extracting contents is attached is stored. At this time, the position is adjusted to the spout opening 7 corresponding to the spout provided on the outer flap on the top surface of the outer box A.

The assembling method of the present invention will be described in more detail. First, as shown in FIG. 2, a blank sheet of the outer box A is provided with four side walls 1 connected in one direction through ruled lines, a connecting piece 2, and a connecting piece 2. A top outer flap 3, a top inner flap 4, a bottom outer flap 5, and a bottom inner flap 6 are formed so as to be vertically connected to the side wall 1. A circular and T-shaped perforation and a ruled line 7 for forming a spout by attaching a spout are formed on the outer flap 3. Furthermore, a notch is provided on the top inner flap 4 so that the inner flap does not block the spout. Then, each plate is bent at the ruled line, the connection piece 2 is attached to the inside of the side plate, and the bottom flap is attached to form the outer box A. The outer flap and the inner flap that form the bottom are both butted flaps. By abutting the inner flaps, a step can be prevented from being formed on the inner surface.

As shown in FIG. 3, the blank sheet of the inner cylinder B includes a side plate 8 bonded to an outer box and a side plate 9 forming a triangular prism-shaped space at a corner of the outer box. Are connected alternately in one direction via. The side plates 8a at both ends which form the side walls of the octagonal inner cylinder by abutting each other have a half of the width of the side plate 8b which is the opposite side wall. The blank sheet is folded along the ruled line, inserted into the outer box A, and the inner surface of the outer box A and the outer surface of the inner cylinder are bonded. This bonding operation can be performed manually or by a dedicated machine.

An inner bag C with a spout filled with liquid is stored in the container thus formed with the spout facing upward, and the top flaps are sequentially folded and adhered.

[0011] The liquid container using the container of the present invention as an outer box is pushed into a circular perforation provided on the top flap to break it, and a T-shaped perforation is pushed into the inner container to be placed in the inner bag. The spout is exposed and used. In another embodiment of the present invention, as shown in FIG. 5, the inner cylinder is formed from two blank sheets. Also in such a case, when forming the inner cylinder, the blank sheets are adhered to the outer box with the end faces of the blank sheets abutting each other so that the inner surface of the inner cylinder has no step and the cross section of the cardboard is not exposed. When the bonding is performed by a dedicated machine, the embodiment of FIG. 5 is more machine-suitable and advantageous.

[0012]

[Effect of the invention]

 By adopting the above configuration, the outer box for a bag-in-box according to the present invention can use the A-type box as the outer box, so that it can be manufactured very simply and the use area of the cardboard is small. Since the inner cylinder and outer box are adhered to each other, the strength is excellent, and when used as a bag-in-box, the inner cylinder is hardly distorted due to the internal pressure of the liquid inside and the vibration during transportation. In addition, there is no step inside the inner cylinder, and the cross section of the corrugated cardboard sheet is not exposed inside, so that the inner bag may be damaged due to vibration during transportation and the contents may leak. Problems can be prevented.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a development view of the outer box of the present invention.

FIG. 3 is a development view of the inner cylinder of the present invention.

FIG. 4 is a schematic cross-sectional view of the body of the present invention.

FIG. 5 is a schematic sectional view showing another embodiment of the present invention.

FIG. 6 is a perspective view showing a conventional example.

FIG. 7 is a perspective view showing another conventional example.

[Explanation of symbols]

 Reference Signs List A outer box B inner cylinder C inner bag 1 side wall 2 connection piece 3 top outer flap 4 top inner flap 5 bottom outer flap 6 bottom inner flap 7 spout opening 8 side plate 9 side plate 10 spout portion

Claims (1)

[Utility model registration claims] 1. An outer box made of corrugated cardboard and an inner cylinder made of corrugated cardboard housed in the outer box. The outer box is connected to a side wall and a connecting piece connected in one direction via a ruled line, and is connected vertically to each side wall. The inner cylinder is formed of a blank sheet having a top flap and a bottom flap, and the inner cylinder is formed by joining the end faces of one or more rectangular blank sheets into an octagonal cylindrical shape and adhered to the inner surface of the side wall of the outer box. An outer box for a bag-in-box.