JP2012153417A - Bag-in-box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate a clearance caused between a bag reduced in volume during transportation of a bag-in-box and a paper box by controlling the body swelling of the paper box.SOLUTION: On each of four longitudinal and lateral circumferential wall surfaces of the paper box are formed a buckling guide frame line formed by pressed lines of a square frame, including vertical and lateral buckling guide lines disposed substantially in parallel along the vertical and lateral outer periphery of each circumferential wall surface; and an auxiliary guide line formed by pressed lines extended obliquely from the upper and lower ends of the lateral outer periphery of each circumferential wall to a corner portion adjacent to the buckling guide frame line. Each circumferential wall thus can be buckled and swollen outward along the buckling guide frame line and the auxiliary guide line.

Description

  The present invention relates to a bag-in-box structure that suppresses friction between the bag and the box during transportation of the bag-in-box in which a resin film bag is accommodated in a cardboard box so that no pinhole is generated in the bag.

If there is a gap between the resin film bag installed in the bag-in-box and the cardboard box of the outer box, the bag and the inner wall surface of the box will rub against each other during transportation, resulting in a pinhole in the bag. There is a fear.
Therefore, for example, Japanese Patent Application Laid-Open No. 11-268762 discloses a configuration in which a bag filled with air is stored in a space formed by the inner top surface of the container exterior and the upper surface of the inner container to close the space.
Japanese Patent Application Laid-Open No. 2002-145322 discloses a configuration in which a buffer body that supports the lower end portion of the inner bag is inserted into the space between the inner bag and the inner bottom portion of the carton.
Further, in Japanese Patent Application Laid-Open No. 2003-276664, a substantially L-shaped cushion material is used, one side is positioned on the side surface of the cardboard box, the other piece is positioned on the upper surface of the bag, and an opening provided in the other piece is provided on the bag. There has been proposed a configuration in which the movement of the bag is regulated by bending downward or surrounding upward so as to surround the bag through the mouth.
However, in the above configuration, since the volume of the cushioning material serving as the spacer is constant, it is effective when the volume of the bag is always constant. When the volume is gradually reduced, the space between the bag and the inner wall surface of the box is expanded, so that pinholes due to the friction of the bag cannot be sufficiently prevented.

Japanese Patent Laid-Open No. 11-268762 JP 2002-145322 A JP 2003-276664 A

  The present invention was devised in view of the above circumstances, and the main problem thereof is that even if the volume of the resin film bag is reduced during the transport of the bag-in-box, the stacked bag-ins are stacked. A bag-in-box is provided in which the cardboard of the box is deformed almost uniformly into a bulging state, and the vertical length of the bag-in-box is shortened so that friction between the bag and the bottom inner wall surface of the box can be suppressed. There is to do.

In order to solve the above-mentioned problems, the present invention provides
In a bag-in-box in which a resin film bag is built in a cardboard or other paper box,
On the four peripheral walls on the front, back, left and right of the paper box,
A buckling guide frame line formed of a stamped ruler made of a rectangular frame disposed substantially parallel to the upper, lower, left and right outer peripheral edges of each peripheral wall;
An auxiliary guide wire formed of a stamped line extending from each corner of the outer peripheral edge of each peripheral wall surface to a corner portion adjacent to the buckling guide frame line;
When the bag-in-box is stacked, each peripheral wall surface is buckled along the buckling guide frame line and the auxiliary guide line, and can be swollen outward.
In the invention of claim 2,
The buckling guide frame line and the auxiliary guide line are formed on the inner surface of the peripheral wall surface of the cardboard box.
In the invention of claim 3,
The buckling guide frame lines formed on the respective peripheral wall surfaces set the distance between the upper outer peripheral edge part and the upper buckling guide line equal to the distance between the lower outer peripheral edge part and the lower buckling guide line. And
The distance between each of the left and right outer peripheral edge portions and each of the left and right buckling guide lines is set to be equal.
In the invention of claim 4,
A corner auxiliary guide line extending horizontally is formed by connecting a pair of auxiliary guide lines provided symmetrically with the left and right outer peripheral edge portions as a center line at a midway position of the auxiliary guide line. .

Since the bag-in-box of this invention is filled with the liquid that is heated and thermally expanded in the resin film bag, the volume of the liquid gradually contracts due to heat radiation in the paper box. By stacking, the paper box is guided by the buckling guide frame line and the auxiliary guide wire, buckled in a well-balanced manner and swollen, so the height of the paper box is reduced corresponding to the shrinking resin film bag, and the paper box Friction between the bottom surface of the bag and the bottom surface of the resin film bag can be suppressed to prevent the bag from being torn due to the occurrence of pinholes.
In addition, by providing corner auxiliary guide lines, the height of the corners extending vertically between adjacent auxiliary guide lines can be folded and shortened when the height is reduced due to the swelling of the body. Can be prevented.

FIG. 3 is a development view of the base paper of the bag-in-box of Example 1. It is a front view which shows the surrounding wall surface of the bag in box. It is the same perspective view. It is a partial side view which shows the stacked state of a bag in box. It is a front view which shows the change of a trunk swelling state. It is a perspective view of the bag in box of Example 2.

  A preferred embodiment of the bag-in-box according to the present invention will be described below with reference to the drawings.

The bag-in-box 10 of the present embodiment has a configuration in which a resin film bag 11 is accommodated in a paper box 1 (see FIG. 5).
The resin film bag 11 is made of a soft plastic film or sheet.
The paper box 1 is formed by bending a base paper 1 'made of one cardboard or paperboard shown in FIG.

  On this base paper 1 ', as shown by a dotted line in FIG. 1, in order to form an A-type box, four peripheral wall surfaces 2 to 5 which are continuous in the lateral direction and a vertical piece for forming one sticking piece 6 are formed. The vertical crease line L1 extending in the direction, the upper and lower wall surfaces 7A, 7B and the lower wall surfaces 8A, 8B and the left and right flap surfaces 9A, 9B, 9C, 9D are identically formed on the upper and lower pairs of the peripheral wall surfaces. A horizontal fold line L2 extending in the horizontal direction is formed on the line.

The vertical fold line L1 and the horizontal fold line L2 may be formed on either the front side or the inner side of the base paper 1 ′.
Further, a hole forming cut line L6 for attaching the resin film bag 11 is formed on the upper wall surface 7A.
Further, in the illustrated example, the peripheral wall surfaces 3 and 5 are formed with a handle cut line L7 formed in a substantially C shape or an oval shape in a sideways manner by a cut line at a midway position above the peripheral wall surfaces 3 and 5.

[Buckling guide frame]
The four peripheral wall surfaces 2 to 5 include a buckling induction frame line L3 made of a square or rectangular frame disposed substantially in parallel along a square or rectangular outer peripheral edge of each peripheral wall surface, and the respective peripheral wall surfaces. Auxiliary guide wire L4 extending from each corner portion of the outer peripheral edge portion to each corner portion of the buckling guide frame line adjacent thereto is provided (see FIG. 2).

  The buckling guide frame line L3 is an upper buckling guide line L3a extending substantially horizontally and spaced apart from the upper and lower outer peripheral edge portions that coincide with the upper and lower horizontal fold lines L2 of each peripheral wall surface by a predetermined length inwardly. And the lower buckling guide line L3b and the left and right outer peripheries that coincide with the vertical crease line L1 are spaced inward by a predetermined length from the inside of the circumferential wall surface, and the upper buckling guide line L3a and the lower buckling guide line L3b It consists of side buckling induction lines L3c and L3d extending between the ends and extending substantially vertically.

Here, the lengths x1 and x2 of the peripheral wall surface of the buckling guide frame line L3 that are separated from the upper and lower outer peripheral edges (L2) are substantially the same as the upper buckling guide line L3a and the lower buckling guide line L3b. It is preferable that
Further, the lengths y1 and y2 of the circumferential wall surface of the buckling guide frame line L3 that are separated from the left and right outer peripheral edge portions (L1) are substantially the same as the side buckling guide lines L3c and L3d. preferable.
However, in the present invention, the length is not limited to the present embodiment as long as the length can be reduced so as to be the same height due to the swelling of the body.

[Auxiliary guidance frame]
The auxiliary guide line L4 is composed of an inclined line extending from each corner of the outer peripheral edge of each peripheral wall surface 2 to 5 to each corner of the buckling guide frame line L3.
In the example of illustration, it consists of a 45 degree inclination line with respect to the crease line L1 used as the base point of the auxiliary guide line L4.

[Corner auxiliary guide wire]
Further, in the present embodiment, a corner portion auxiliary that extends horizontally by connecting a pair of auxiliary guide lines L4 and L4 symmetrically between adjacent peripheral wall surfaces around the crease line L1 at a midway position thereof. A guide line L5 is formed.
Here, the corner portion auxiliary guide line L5 may connect the intersections of the pair of auxiliary guide lines L4 and L4 and the buckling guide frame line L3 (not shown).

  Since it consists of the said structure, the said base paper 1 'is bend | folded by the crease line L1 and the horizontal crease line L2, and the sticking piece 6 is piled up on the edge part of the surrounding wall surface 2, and is made into a cylinder shape, and the lower left and right flap surfaces 9C and 9D are faced to each other, and a pair of lower wall surfaces 8A and 8B are bonded to each other, and a paper box 1 having an open top as a bottom is assembled.

The resin film bag 11 has a size substantially corresponding to the inner volume of the paper box 1 and is filled with a liquid such as water that has been heat-treated for sterilization.
The resin film bag 11 is housed in the paper box 1, the upper left and right flap surfaces 9A and 9B are faced, and a pair of upper wall surfaces 7A and 7B are laminated thereon to seal the paper box 1. Thus, the bag-in-box 10 is completed (see FIG. 3).

The bag-in-boxes 10 configured as described above are stacked and transported to the destination.
During transport, the resin film bag 11 shrinks in volume due to heat dissipation.
At the same time, the stacked box-in-box paper boxes 1 are guided by the buckling guide frame line L3 and the auxiliary guide line L4, buckled substantially uniformly in the four circumferential directions and swollen, and the height of the paper box 1 is increased. (See FIGS. 4 and 5).

  In addition, the corner portion extending along the vertical fold line L1 along the vertical fold line L1 of the paper box 1 is inclined by the corner auxiliary guide line L5, so that the height of the corner portion along the vertical fold line L1 as well as the wide surface of the peripheral wall surface is increased. Also, it can be shrunk in response to the swelling of the trunk.

  As a result, even if the volume of the resin film bag 11 shrinks, the height of the paper box 1 also shrinks. Therefore, the inside of the bottom surface of the paper box 1 and the resin film bag 11 do not rub, and the bag is damaged. Can be prevented.

In the first embodiment, the corner auxiliary guiding line L5 is formed to incline the upper and lower ends of the corner along the vertical fold line L1, but even in the case where the corner auxiliary guiding line L5 is not provided in the present invention. Good.
This is also because the upper and lower ends of the corner portion along the vertical fold line L1 can be bent in conjunction with the buckling deformation by the buckling guide frame line L3 and the auxiliary guide line L4.
Since other configurations are the same as those of the first embodiment, the description thereof is omitted.
Of course, various design changes can be made without departing from the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Paper box 1 'Base paper 2-5 Peripheral wall surface 6 Sticking piece 7A, 7B Upper wall surface 8A, 8B Lower wall surface 9A, 9B Upper flap surface 9C, 9D Lower flap surface 10 Bag in box 11 Resin film bag L1 Vertical Folding line L2 Horizontal folding line L3 Buckling guide frame line L3a Upper buckling guide line L3b Lower buckling guide line L3c, L3d Side buckling guide line L4 Auxiliary guide line L5 Corner part auxiliary guide line L6 Cut line for forming holes

Claims (4)

In a bag-in-box in which a resin film bag is built in a cardboard or other paper box,
On the four peripheral walls on the front, back, left and right of the paper box,
A buckling guide frame line formed of a stamped ruler and a quadrangular frame made up of top, bottom, left and right buckling guide lines disposed substantially parallel to the upper, lower, left and right outer peripheral edges of each peripheral wall;
An auxiliary guide wire formed by a ruled line extending obliquely from the upper and lower ends of the left and right outer peripheral edge portions of each peripheral wall surface to a corner portion adjacent to the buckling guide frame line;
A bag-in-box characterized in that, when the bag-in-box is stacked, each peripheral wall can buckle along the buckling guide frame line and the auxiliary guide line and bulge outward.   The bag-in-box according to claim 1, wherein the buckling guide frame line and the auxiliary guide line are formed on an inner surface of a peripheral wall surface of the cardboard box. The buckling guide frame lines formed on each peripheral wall set the distance between the upper outer periphery and the upper buckling guide line equal to the distance between the lower outer periphery and the lower buckling guide line. And
The bag-in-box according to claim 1 or 2, wherein a distance between each of the left and right outer peripheral edge portions and each of the left and right buckling guide lines is set to be equal.   A corner auxiliary guide line extending horizontally is formed by connecting a pair of auxiliary guide lines provided symmetrically with each of the left and right outer peripheral edge portions as a center line at a midway position of the auxiliary guide line. Item 4. The bag-in-box according to any one of Items 1 to 3.

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