JPH0572740U - Inner bag - Google Patents

Abstract

(57) [Summary] (Modified) [Purpose] It is a laminated film bag form that contributes to the reduction of storage space and transportation costs, can be disposed of together with general dust, and has gas barrier properties. [Structure] A gusset insert 12, 1 in which a fold line is formed between both side edges of laminated laminate films 11, 11.
Insert 2. Between the folding lines 13, the gusset folding body 12,
The edges of 12 are sealed to both side edges of the films 11, 11. The heat-sealing portion 182, which is inclined at 45 degrees in a direction away from each other from the positions P and Q on the respective seals, which are spaced from each other by a height equal to or less than the inner dimension of the outer package, toward the folding lines 13 and 13.
At 183, the gusset inserts 12 and 12 are attached to the films 11 and 1.
Seal to 1. One edge of the films 11 and 11 is connected to the heat-sealing portion 182 for sealing, and the film 1
An opening 14 is provided at the other end edge of 1, 11. When the folded inner bag 10 is put into the box of the exterior body and liquid or powder is injected from the opening 14, it is expanded and assembled into a rectangular parallelepiped shape.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an inner bag to be installed in a corrugated cardboard box or the like, and more particularly to an inner bag suitable for being filled with a content such as liquid or powder and installed in the corrugated cardboard box for use.

[0002]

[Prior Art]

 Conventionally, contents such as liquids and powders are generally stored in containers such as cans and bottles for transportation.

In addition, a polyethylene inner bag manufactured by inflation molding is often used as a conventional inner bag for a cardboard box.

[0004]

[Problems to be solved by the device]

 With conventional containers such as cans and bottles, it is impossible to collect and reuse all the containers used in ordinary households. There is a problem in that containers that are not collected are often thrown together with ordinary garbage, which causes pollution due to waste.

Further, the container has a problem in that a large space for storing and transporting a large amount of empty containers before accommodating the contents and a high cost are required.

Further, the conventional inflation-molded inner bag made of polyethylene for a corrugated box has a problem that it cannot be used for contents requiring gas barrier properties because it does not have gas barrier properties.

The present invention was developed to solve the above problems, and contributes to space saving in a container storage area before use, is easy to transport, and does not cause waste pollution. An object of the present invention is to provide an inner bag that can be disposed of together with general dust, and also to provide an inner bag having a wide range of applications that can be easily manufactured with a laminated film having a gas barrier property.

[0008]

[Means for Solving the Problems]

 In order to achieve the above object, in the inner bag 10 of the present invention, the folding lines 13 and 13 are formed in the center between the both side edges of the overlapped films 11 and 11 and are formed in a V-shaped cross section. The second gusset insert 12, 12 is inserted. An appropriate distance is provided between the folding lines 13 of the two gusset folding bodies 12, 12 to seal the edges of the gusset folding bodies 12, 12 and both side edges of the superposed films 11, 11. Further, on the seals on both side edges of the two films 11, 11, there are two positions P, which are separated by a predetermined distance, for example, a height equal to or smaller than the inner dimension of an outer package such as a cardboard box. Each of the two gusset folds 12, 12 is inclined in a direction away from each other toward the fold lines 13, 13 of the two gusset folds, and is diagonally parallel, for example, less than half the diagonal distance of the inner dimension of the outer package. The gusset inserts 12 and 12 and the films 11 and 11 are sealed by the inclined heat seal portions 182, 182, 182, 182 and 183, 183, 183, 183 which are the inclined seal portions having the length. Further, a heat seal part for connecting one edge of the two films 11, 11 between the folding lines 13, 13 of the second gusset folding body 12, 12 to the inclined heat seal parts 182, 182, 182, 182. After sealing with 184, an opening 14 is provided at the other edge of the two films 11, 11 between the folding lines 13, 13.

Further, the two films 11 and 11 and the two gusset folded bodies 12 and 12 may be formed of a heat-welding laminated film and heat-sealed at each sealing portion.

Further, each of the inclined heat seal portions 182, 182, 182, 182 and 183, 183, 183, 183 has an inclination angle of 45 degrees with respect to the extension lines of both side edges of the films 11, 11. It is desirable to provide so that.

Further, it is preferable to cut and remove the films 11 and 11 and the gusset folded bodies 12 and 12 on the outer side of the respective seal portions.

Further, the tubular body 15 made of the film 11 is inserted into the opening 14, and one end of the tubular body 15 in the axial direction is projected into the bag to seal the outer periphery of the tubular body 15 and the opening 14. Can be blocked.

[0013]

[Action]

 The inner bag 10 constructed as described above is made of a laminate film having a heat-welding property in particular. The films 11 and 11 and the second gusseted folds 12 and 12 are formed by stacking these films as described above and then forming these films 11 and 11 together. , 11 are pressed by a heater to be easily sealed at each heat seal part.

Then, the inner bag 10 is put into the inside of a cardboard box or the like as an outer package, and when contents such as liquid or powder are injected into the inner bag 10 through the opening 14, the folded inner bag 10 is The fold lines 13, 13 of the gusset fold bodies 12, 12 are gradually pushed outward by the contents, and the four inclined heat seal portions 182, 182, 182, 182 and the four inclined heat seal portions which are the respective inclined seal portions. 183, 183, 183, and 183 gradually move in a direction toward each other together with the opening 14 and the heat seal portion 184 between the two folding lines 13 and 13, and develop into a rectangular parallelepiped shape. The inner bag 10 is easily formed to have a size corresponding to the shape of a stepped ball box or the like of the exterior body, and is bulged and assembled into a rectangular parallelepiped shape that fits the internal shape of a cardboard box or the like.

The inner bag 10 does not cause pollution even if it is disposed of together with general waste after the contents are used.

[0016]

【Example】

 An embodiment will be described with reference to the drawings. FIG. 1 shows an inner bag 10 in a folded state before containing contents such as liquid and powder, and has an octagonal shape in a plane.

The inner bag 10 is formed by stacking two films 11, 11 made of a laminated film having a gas barrier property, as shown by a chain double-dashed line in FIG. As shown in FIG. 2, the two gusset folded bodies 12 and 12 are half-folded between both side edges of the two films 11 and 11 to fold them into a gusset shape. An appropriate distance E is provided in parallel between the twelve folding lines 13 and 13. Two side edges P of the films 11 and 11 are formed on each side edge of the gusset folds 12 and 12 in this embodiment to have a length A which is substantially the same as the inner height of an outer package such as a cardboard box. , Q between the heat seal portions 181, 181, 181, 181 heat seal.

On the other hand, the gussets are formed by the inclined heat seal portions 182, 182, 182, 182 and the inclined heat seal portions 183, 183, 183, 183 which are diagonally parallel from both ends of the heat seal portions 181, 181, 181, 181. The folded bodies 12, 12 are heat-sealed to the respective films 11, 11. That is, the inclined heat seal portions 182, 182, 182, 182 and the inclined heat seal portions are inclined from the two points P and Q toward the folding lines 13 and 13 of the two gusset folding bodies 12 and 12, respectively, away from each other. At 183, 183, 183 and 183, the gusset folding bodies 12 and 12 are heat-sealed to the films 11 and 11.

The inclined heat seal portions 182 and 182 connecting the point P on the right side of FIG. 1 and the lower end point S of the folding line 13 of the gusset folding body 12 are heat seal portions 181 and 181 on the right side edges of the films 11 and 11. The inclined heat seal portion 183 is inclined so as to form an inclination angle of 45 degrees with respect to the extension line of FIG. 1 and connects the point Q on the right side of the drawing with the point R near the upper end of the folding line 13 of the gusset folding body 12. , 183 are inclined so as to form an inclination angle of 45 degrees with respect to the extension lines of the heat seal portions 181 and 181 on the right side edges of the films 11 and 11. In this embodiment, the length F of each slanted heat seal portion 182 and the length D of each slanted heat seal portion 183 are equal to or less than half of the diagonal distance of the inner dimension of the outer package. is there.

In FIG. 1, the gusset insert 12 on the left side of the inner bag 10 is inclined to the films 11 and 11 at symmetrical positions in the same manner as the gusset insert 12 on the right side described above. Heat sealing is performed by the heat sealing portions 183 and 183.

Further, one edge of the films 11, 11 between the two folding lines 13, 13 is heat-sealed by a heat seal portion 184. That is, in FIG. 1, the two films 11 and 11 between the intersections S and S of the lower ends of the inclined heat seal parts 182, 182, 182 and 182 and the lower ends of the folding lines 13 and 13 are heat seal parts of the edges. Heat seal at 184.

An opening 14 is formed at the other edge of the two films 11 and 11 between the two folding lines 13 and 13. That is, in FIG. 1, the inner edges of the two films 11, 11 are located between the intersections R, R of the upper ends of the inclined heat seal portions 183, 183, 183, 183 and the vicinity of the upper ends of the folding lines 13, 13. An opening 14 serving as an injection port for injecting the contents into the bag 10 is formed. In the present embodiment, the gusset inserts 12, 12 are further inserted between the intersections R, R and the upper edges of the films 11, 11. It is heat-sealed to form an opening 14 that can be deformed into a short tubular shape.

In the present embodiment, the films 11, 11 and the gusset folds 12, 12 form a heat-welding seal layer on one surface that is the inner surface of the inner bag 10 and the other surface that is the outer surface of the bag. This is a laminated film composed of a heat-welding non-heat-welding layer, and the films 11 and 11 and the gusset folds 12 and 12 are in contact with each other at the sealing layers. Therefore, as shown in FIG. 1, the gusset folds 12 and 12 are inserted between the two side edges of the two films 11 and 11, respectively, and the folds 12 and 12 are overlapped with each other, and the films 11 and 11 are pressed vertically from the outer surface by a heater. Then, the heat seal parts 181, 182, 183, 184 can be heat sealed at the same time. However, the films 11 and 11 and the gusset folded bodies 12 and 12 are not limited to the above-mentioned laminated film, and may be formed of other non-heat-welding films. In this case, the heat-sealing portions 181, 182 The positions corresponding to 183 and 184 can be sealed with an adhesive.

Further, the films 11 and 11 outside the heat seal parts 181, 182, 183 and 184 and the gusset folding bodies 12 and 12 (that is, the films 11 and 11 and the gusset folding shown by the two-dot chain line in FIG. 1). The inner bag 10 as shown in FIG. 1 is formed by cutting the corner portions of the bodies 12, 12.

In the present embodiment, the distance E between the folding lines 13 and 13 of the gusset folding bodies 12 and 12 is parallel to each other, and the inclined heat seal portions 182, 182, 182 and 182 and the inclined heat seal portions are formed. 183, 183, 183, and 183 form an inclination angle of 45 degrees with respect to the extension lines of the heat seal portions 181, 181, 181, and 181 respectively, and further, the second folding lines 13 and 13 and the heat seal portions 181. , 181, 181, 181 have the same length C, C, C ', C', the inner bag 10 filled with the contents swells to form a rectangular parallelepiped as will be described later. The inner bag 10 is not limited to the above conditions. That is, when the inclination angles of the inclined heat seal portions 182, 182, 182, 182 and the inclined heat seal portions 183, 183, 183, 183 are not 45 degrees, the unfolded inner bag is located between the opposite sides of each corner. The angle is not 90 degrees, and the shape is a deformed rectangular parallelepiped. Also, when the distance E is not parallel, the size of the upper surface and the lower surface of the expanded rectangular parallelepiped is different, but there is no problem as the inner bag 10. Further, when the lengths C and C'are different, the shape is similarly deformed into a rectangular parallelepiped shape.

The folded inner bag 10 described above is mainly used as an inner bag of a 18-liter can. When the inner bag 10 is put into a cardboard box of an outer package and filled with contents through the opening 14, the contents gradually increase. After being unfolded, it is finally formed into a rectangular parallelepiped as shown in FIG. 4 in a cardboard box. The cardboard box is omitted in FIG.

That is, when the contents are injected into the inner bag 10 through the opening 14, the folding lines 13, 13 of the gusset folding bodies 12, 12 are located between the heat seal parts 181 and 181 in FIG. 1 depending on the contents. At the same time, the inclined heat seal parts 182, 182, 182, 182 on the four sides and the opening 14 and the inclined heat seal parts 183, 183, 183, 183 on the four sides and the heat seal part 184 are pressed outward. The films 11 and 11 and the gusset folds 12 and 12 that move toward each other and are located between the inclined heat seal portions 182, 182, 182, 182 on the four sides become the bottom surface of the rectangular parallelepiped, and the inclined heat seal portions on the four sides. The films 11 and 11 and the gusset folding bodies 12 and 12 located between 183, 183, 183 and 183 form the upper surface of the rectangular parallelepiped. Further, the films 11 and 11 and the gusset folded bodies 12 and 12 located between the four heat seal portions 181, 181, 181, and 181 are four side surfaces of a rectangular parallelepiped.

The size of the rectangular parallelepiped of the inner bag 10 is such that the width of the bottom surface is the distance B between the heat seal parts 181 and 181 on both side edges of the films 11 and 11, and the depth of the bottom surface is the folding line 13 and the film 11. The length C is twice the distance C to one side edge, and the height of the side surface is the length A of each heat-sealed portion 181, 181, 181, 181 on both side edges of the films 11, 11. The length D of each inclined heat seal part 183, 183, 183, 183 and the length F of each inclined heat seal part 182, 182, 182, 182 are the same, and the positions are symmetrical with respect to the top surface and the bottom surface. to have, in a position which forms a length E ₂ of length E ₁ and the heat seal portion 1 84 also identical symmetrical top and bottom of the opening 14.

The inner bag 10 has a length E and a position E of each heat seal portion 181, 182, 183, 184, and a distance E between the two folding lines 13 and 13 depending on the size and shape of the cardboard box of the exterior body. Can be easily changed, and thus the inner bag 10 can be formed so as to closely fit the inner surface of a corrugated cardboard box or the like.

It should be noted that the opening 14 may be closed by sealing the two films 11, 11 after filling the contents, or a valve (not shown) may be sealed and connected to the opening 14. .. Alternatively, as shown in FIG. 7, a tubular body 15 made of a film is inserted into the opening 14 so that one end of the tubular body 15 in the axial direction is projected into the inner bag 10, and the outer peripheral surface of the tubular body 15 and the opening 14 are inserted. When the contents are injected from the opening at one end in the axial direction of the tubular body 15 by sealing and closing the space, the air pressure inside the inner bag 10 is applied to the inner bag at the opening portion at the other end in the axial direction of the tubular body 15. The film, which rises due to the external pressure and the pressure of the contents, constitutes the cylindrical body 15 and is pressed in the diametrical direction by the seal, so that the film is flattened and closed, and the cylindrical body 15 acts as a check valve.

Next, another embodiment will be described with reference to FIGS. 5 and 6.

This inner bag 10 is similar to the inner bag 10 of FIG. 1 of the above-described embodiment, in which two films 11 and 11 are overlapped with each other, and two films 11 and 11 are provided with a double film between both side edges. The gusset folded bodies 12 and 12 are folded in a gusset shape, and both side edges of the films 11 and 11 in the width direction and one end length in the longitudinal direction of the films 11 and 11 are set to the entire length of each edge of the gusset folded bodies 12 and 12. The entire length is heat-sealed by the heat-sealing portions 181, 181 ′, 185, and the films 11, 11 between the folding lines 13, 13 of the second gusset folding bodies 12, 12 are heat-sealed by the heat-sealing portion 184. The heat seal portion 181 ′ is heat-sealed simultaneously with the heat seal portion 181 on the extension line of the heat seal portion 181, and the heat seal portion 185 is heat sealed with the heat seal portion 184 on the extension line of the heat seal portion 184.

Further, in the inner bag 10 shown in FIG. 5, the films 11 and 11 are formed on the gusset folded bodies 12 and 12 by the inclined heat seal portions 182, 182, 182 and 182 and the inclined heat seal portions 183, 183, 183 and 183. Each of them is heat-sealed in the same manner as the inner bag 10 of FIG. The heat seal parts 181, 181 ′, 182, 183, 184 and 185 can be heat sealed at the same time.

Further, in the inner bag 10 of FIG. 1 of the above-described embodiment, the corners of the films 11, 11 and the gusset folding bodies 12, 12 on the outside of the inclined heat seal portions 182, 183, that is, the two-dot chain line portions are Although cut, the inner bag 10 in FIG. 5 is not cut. However, when the contents of the corners of the films 11 and 11 and the gusset folds 12 and 12 are filled in the inner bag 10, as shown in FIG. Since it extends along the bottom of the bottom, there is no problem in actual use. Therefore, even in the inner bag 10 shown in FIG. 1, it is not necessary to cut the corner portion (the two-dot chain line portion).

The action of filling the inner bag 10 of FIG. 5 with the contents is the same as that of the inner bag 10 of FIG. 1 of the above-described embodiment.

[0036]

[Effect of the device]

 Since the present invention is configured as described above, it has the following effects.

(1) It was possible to provide an inner bag having a wide range of applications, which can be easily manufactured using a laminated film having gas barrier properties.

(2) Further, since the inner bag before use is in a folded state, and the cardboard box as an exterior body can also be folded, it contributes to space saving of a storage place before use and is easy to transport. Therefore, it also contributes to the reduction of these costs.

(3) Further, the cardboard box of the exterior body can be disposed of together with general waste, regardless of whether it is reused or not, so that it does not cause pollution and is disposable. ..

(4) Further, when manufacturing the inner bag of the present invention, the length and position of each seal portion and the distance between the folding lines of the second gusset folding body can be easily changed, so that a cardboard box of the exterior body is formed. It can be easily molded into a shape that matches the size and shape of the.

(5) If the inclined heat-sealing portion has an inclination angle of 45 degrees with respect to the extension lines of both side edges of the film, it is possible to provide an inner bag that can be developed into a rectangular parallelepiped.

(6) By cutting and removing the film on the outer side of each of the seal portions, an unnecessary film piece does not protrude to the outer surface of the developed rectangular parallelepiped, and it is possible to provide an inner bag having high commercial value.

(7) A tubular body made of a film is inserted into the opening to project one end of the tubular body in the axial direction into the bag, and the outer periphery of the tubular body and the opening are sealed and closed to form an opening. We were able to provide an inner bag with a check valve.

[Brief description of drawings]

FIG. 1 is an overall plan view showing an inner bag according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line II-II of FIG.

3 is a sectional view taken along the line III-III in FIG.

FIG. 4 is an overall perspective view of the inner bag of FIG. 1 developed.

FIG. 5 is an overall plan view showing an inner bag according to another embodiment of the present invention.

6 is an overall perspective view of the inner bag of FIG. 5 developed.

FIG. 7 is a plan view of an essential part showing an inner bag according to another embodiment of the present invention.

[Explanation of symbols]

 10 Inner bag 11 Film 12 Gusset folding body 13 Folding line 14 Opening 15 Cylindrical body 181 Heat seal part 182,183 Inclined heat seal part 184, 185 Heat seal part

Claims (6)

[Scope of utility model registration request] 1. The two gusset folds are formed by inserting an appropriate distance between the two folds of the two gusset folds having fold lines between the both side edges of the superposed films. The end edge of the body and the both side edges of the two films are sealed, and the two side edges of the superposed films are separated from each other by a predetermined distance from each other toward the two folding lines. The gusset folding body and the film are sealed by a slanted seal portion that is inclined in a direction parallel to the diagonal direction, and the lower edge of the superposed film between the folding lines of the two gusset folding bodies is slanted. An inner bag characterized in that it is connected to a sealing portion and sealed, and an opening is formed at an upper edge of the second film. 2. Inserting the two gusset folds with an appropriate distance between the two fold lines of the two gusset folds having fold lines between both side edges of the two superposed films, Two positions that seal the edge of the gusset folded body and both side edges of the two films and that are spaced apart from each other by a distance equal to or less than the inner dimension height of the outer package on the seal of both side edges of the two films. From each of the two fold lines inclined in the direction away from each other and sealing the gusset fold body and the film with an inclined seal portion having a length not more than half the diagonal distance of the inner dimension of the exterior body, and The lower edge of the second film between the folding lines of the second gusset fold body is connected to the inclined seal portion for sealing, and an opening is formed in the upper edge of the second film. bag. 3. The inner bag according to claim 1, wherein the two films and the two gusset folds are formed of a heat-welding laminated film and heat-sealed at each sealing portion. 4. The inner bag according to claim 1, wherein each of the inclined seal portions forms an inclination angle of 45 degrees with respect to an extension line of both side edges of the film. 5. The inner bag according to claim 1, wherein the film on the outside of each of the seal portions is cut and removed. 6. A cylindrical body made of a film is inserted into the opening, one end of the cylindrical body in the axial direction is projected into the bag, and the outer periphery of the cylindrical body and the opening are sealed and closed. Inner bag described in 2.