JP7424224B2 - packaging bag - Google Patents

Description

The present invention relates to bags for packaging articles.

As one type of cushioning material, a sheet in which a plurality of linearly extending notches are provided in a staggered manner is known. When this sheet is stretched in a direction perpendicular to the direction in which the notches extend in its extending plane, the eyes corresponding to the notches open in a honeycomb shape (for this reason, it is also called "honey paper"). As a result, this sheet increases in dimension in the thickness direction and changes into a mat-like shape with a cushioning margin (also referred to as "cushion paper" due to its function). A packaging device in which such a sheet is incorporated as a buffer portion has also been proposed (see Patent Document 1).

Japanese Patent Application Publication No. 2016-34852

In a packaging bag in which a buffer portion as described above is housed in a bag-like exterior body, there is a need to ensure protection of articles and increase reliability as a packaging bag.
This project was devised in view of the above-mentioned issues, and one of the purposes is to improve the reliability of packaging bags. Note that this purpose is not limited to this purpose, and the scope of this case also includes functions and effects derived from each configuration shown in the "Details for Carrying Out the Invention" described later, which cannot be obtained with conventional techniques. It can be positioned for other purposes.

The packaging bag disclosed herein has a bag-like exterior body with an opening, and a sheet-like interior material in which a plurality of notches extending in a predetermined direction are provided in a staggered manner. A buffer section is provided inside the outer package in an expandable state or in a pre-extended state, and the article is packaged. The buffer section includes at least a part of a multilayer section in which a plurality of interior materials are stacked in a thickness direction between the article and the exterior body.

According to the present invention, the reliability of the packaging bag can be improved.

It is a perspective view showing a packaging bag according to an embodiment when it is not in use. FIG. 2 is a longitudinal cross-sectional view of FIG. 1; FIG. 2 is a longitudinal cross-sectional view showing the packaging bag according to the embodiment in use. FIG. 3 is a plan view showing an enlarged main part of the buffer section in an unexpanded state. FIG. 3 is an enlarged perspective view showing a main part of the buffer section in an extended state. It is a longitudinal cross-sectional view showing a packaging bag according to a first modification. It is a longitudinal cross-sectional view showing a packaging bag according to a second modification. It is a longitudinal cross-sectional view showing a packaging bag according to a third modification. It is a longitudinal cross-sectional view showing a packaging bag according to a fourth modification. FIG. 7 is a perspective view showing a modification of the interior material stacked in the multilayer portion of the buffer section.

A packaging bag as an embodiment will be described with reference to the drawings. It should be noted that the embodiments shown below are merely examples, and there is no intention to exclude the application of various modifications and techniques not explicitly shown in the embodiments below. Each structure of this embodiment can be modified and implemented in various ways without departing from the spirit thereof. Further, they can be selected or combined as necessary.

A packaging bag is a bag for packaging articles. In this embodiment, a packaging bag will be described in which a main bag is provided with a buffer portion that protects an article to be packaged. The main bag (exterior body) and buffer part (inner body) that make up this packaging bag are made of kraft paper, high quality paper, medium quality paper, thin paper, glassine paper, art paper, coated paper, cast coated paper, inkjet recording paper, Paper and paperboard such as Kurupak paper, liner, white paperboard, laminated paper with thermoplastic resin such as polyethylene resin laminated on one or both sides of these papers, nonwoven fabrics such as spunbond and spunlace, and plastics such as synthetic paper and film. It can be formed from a sheet material such as a sheet. In particular, it is preferable to use kraft paper or Krupak paper. Note that, in order to improve water resistance, paper or paperboard may be compounded with a water-repellent agent, a paper strength enhancer, etc. on the surface or inside thereof, and a water repellent agent, a sizing agent, etc. on the surface.
It is preferable that the main body bag and the buffer part are formed from the same material such as paper (including paperboard) or resin. However, the main body bag and the buffer portion may be formed from different materials.

In the following description, a packaging bag will be described in which the direction in which gravity acts is downward and the opposite direction is upward, with the opening facing upward. Further, the vertical direction of this packaging bag is defined as the length direction, the direction perpendicular to the length direction when viewed from the front is defined as the width direction, and the direction perpendicular to both the length direction and the width direction is defined as the thickness direction. Further, in this packaging bag, the inner space side where the article is accommodated is defined as the inside, and the opposite side is defined as the outside.

[1. composition]
As shown in FIGS. 1 and 2, the packaging bag 1 includes a bag-like main bag 2 having an opening 9 and a buffer section 3 housed inside the main bag 2. As shown in FIGS. The packaging bag 1 also includes an outer flap 4 that protrudes from the main bag 2 and covers the opening 9, and is arranged inside the outer flap 4 in a sealed state (sealed state) to cover the article from the opening 9 side. It may further include an inner flap 5.
Articles are inserted into and removed from the packaging bag 1 through the upward opening 9. Therefore, the direction of insertion and removal of articles in the packaging bag 1 of this embodiment coincides with the length direction.

[Body bag]
First, the main body bag 2 will be explained. Here, a square envelope without a gusset is exemplified as the main body bag 2. However, the main body bag 2 is not limited to the one illustrated here, and may be a gusseted envelope, a long envelope, a Western-style envelope, or a non-standard envelope.
The main body bag 2 may have a double structure in which an outer bag (outer material) 10 and an inner bag (inner material) 20 are placed inside. That is, the main body bag 2 may be configured by overlapping two bags 10 and 20 of different sizes. Note that both the outer bag 10 and the inner bag 20 are bag-shaped, and are formed to be slightly larger than the inner bag 20 so that the outer bag 10 can accommodate the inner bag 20 inside. By making the main body bag 2 have a double structure, the strength of the main body bag 2 can be increased.

The outer bag 10 includes a first outer surface portion 11 and a second outer surface portion 12 that face each other in the thickness direction. The first outer surface portion 11 and the second outer surface portion 12 are connected to each other at a lower end (bottom) 15 and both ends (side ends) 16 in the width direction. In the main body bag 2 with a gusset, the first outer surface portion 11 and the second outer surface portion 12 are connected to each other via a gusset portion (not shown).
The upper edge portion 13 of the first outer surface portion 11 is arranged on one side of the opening 9 (the upper right side in FIG. 1). Further, the upper edge portion 14 of the second outer surface portion 12 is arranged on the other side of the opening 9 (lower left side in FIG. 1).

The inner bag 20 is constructed similarly to the outer bag 10. Specifically, as shown in FIG. 2, the inner bag 20 includes a first inner surface section (first surface section) 21 and a second inner surface section that are configured similarly to the first outer surface section 11 and the second outer surface section 12, respectively. (Second surface portion) 22 is provided. The first inner surface portion 21 and the second inner surface portion 22 are also connected to each other at the lower end and both ends in the width direction. In the main body bag 2 with a gusset, the first inner surface portion 21 and the second inner surface portion 22 are connected to each other via a gusset portion (not shown).
The upper edge (first edge) 23 of the first inner surface 21 is located on one side of the opening 9 (on the right side in FIG. 2) and inside the first outer surface 11 . Further, the upper edge portion (second edge portion) 24 of the second inner surface portion 22 is arranged on the other side of the opening 9 (on the left side in FIG. 2) and inside the second outer surface portion 12.

The inner bag 20 of this embodiment is attached to the outer bag 10. Here, the inner bag 20 attached to the outer bag 10 at the lower end (bottom) is illustrated. In addition, the inner bag 20 may be attached to the outer bag 10 over the entire area or may be attached partially.
In the main body bag 2, the first outer surface part 11 and the first inner surface part 21 are overlapped in the thickness direction and integrated, and the second outer surface part 12 and the second inner surface part 22 are also overlapped in the thickness direction and integrated. has been made into Therefore, in the following explanation, the first outer surface part 11 and the first inner surface part 21 are collectively referred to as the first surface parts 11 and 21 of the main body bag 2, and the second outer surface part 12 and the second inner surface part 22 are collectively referred to as the first surface parts 11 and 21 of the main body bag 2. It is also called the second surface portion 12, 22 of the main body bag 2.
In the main body bag 2, the upper end edges 13, 23 of the first surfaces 11, 21 and the upper end edges 14, 24 of the second surfaces 12, 22 define an opening 9.

[Buffer section]
Next, the buffer section 3 of the packaging bag 1 will be explained.
As shown in FIG. 1, the buffer section 3 includes a sheet-like interior material (first It is a cushioning material composed of interior material) 30, and is also called honey paper or cushion paper.
When the interior material 30 forming the buffer section 3 is pulled in a direction intersecting a predetermined direction in which the notches 31 extend (hereinafter also simply referred to as the "crossing direction"), the eyes corresponding to the notches 31 open. Stretch in the cross direction.

The buffer section 3 is attached to the inner surface of the main body bag 2. When the main body bag 2 has a double structure, the buffer portion 3 is attached to the inner bag 20 of the main body bag 2. Here, the buffer section 3 attached to the inner bag 20 via adhesive or adhesive is illustrated.
The buffer section 3 is provided inside the main body bag 2 with the interior material 30 being expandable or pre-expanded in the cross direction. In this embodiment, the buffer section 3 is provided in such a manner that the interior material 30 spanned between the first surface portions 11, 21 and the second surface portions 12, 22 of the main body bag 2 is extendable in the cross direction. Illustrate.

As shown in FIG. 2, the buffer section 3 is arranged such that the predetermined direction in which the notch section 31 extends is along the width direction of the packaging bag 1, and the upper end edge 23 of the first inner surface section 21 and the upper end edge of the second inner surface section 22. It is suspended between the parts 24 and 24. That is, the buffer part 3 is in a position where the predetermined direction intersects the insertion/extraction direction of the article, and the upper end edges 13 and 23 of the first surface parts 11 and 21 and the upper end edge 14 of the second surface parts 12 and 22 in the main body bag 2 are , 24. The buffer section 3 suspended in this manner is attached to each of the upper edge 23 of the first inner surface 21 and the upper edge 24 of the second inner surface 22.

The buffer section 3 of this embodiment has a multilayer section 3A as a whole, in which a plurality of interior materials 30 are stacked in the thickness direction between the article to be packaged and the main body bag 2. In other words, in this embodiment, the entire buffer section 3 is the multilayer section 3A. Here, a buffer section 3 is illustrated in which two interior materials 30 are stacked on each other in a multilayer section 3A, and the predetermined directions of these interior materials 30 are set to be the same direction (in this embodiment, the width direction).
By making the buffer section 3 have a double (multiple) structure, the buffering performance can be further improved.

The interior material 30 constituting the buffer section 3 is folded in half so as to form a downwardly convex V-shape. In the buffer section 3, the pasting ends 33, 34, which are the two upper ends of the interior material 30 folded in half as described above, are attached to the upper end edges 23, 24 of the first inner surface section 21 and the second inner surface section 22. The main body part 35, which is attached to each of the parts and suspended between the attached end parts 33 and 34, is arranged without being attached to any part. Note that the two interior materials 30 stacked one on top of the other in the multilayer portion 3A are bonded to each other at the bonding ends 33 and 34.
Hereinafter, among the two attached ends 33 and 34 of the buffer section 3, the one attached to the upper edge 23 of the first inner surface part 21 is also referred to as the first attached end 33, and the upper end of the second inner surface part 22. The other end attached to the edge 24 is also referred to as a second attached end 34.

The notch portion 31 is provided at least in the main body portion 35. As shown in FIG. 3, when the article 8 placed in the packaging bag 1 is placed through the opening 9, the main body portion 35 expands in the length direction due to the weight of the article 8. In other words, the buffer section 3 is in an unstretched state (unstretched state) in the packaging bag 1 before the article 8 is inserted (when not in use), and the buffer section 3 is in an unstretched state (unstretched state) in the packaging bag 1 after the article 8 is inserted (when in use). 1, it is in a state of being extended in the length direction (stretched state). Note that the buffer section 3 is configured so as not to come into contact with the lower end of the main body bag 2 even in the extended state.

As shown in FIG. 4, in the main body portion 35 in an unstretched state, a plurality of notches 31 are intermittently arranged in parallel along a predetermined direction (in the present embodiment, the width direction), and adjacent notches 31 in the predetermined direction A non-cut portion 32 is provided between the portions 31. A dimension L1 of the cut portion 31 in a predetermined direction is set larger than a dimension L2 of the non-cut portion 32 in a predetermined direction (L1>L2).

Here, a first pattern P1 is defined as a row in which the cut portions 31 and the non-cut portions 32 are arranged alternately along a predetermined direction. Furthermore, the arrangement of the other rows in which the notches 31' and the non-notches 32', which are shifted by half a pitch from the notches 31 and the non-notches 32 of the first pattern P1, are arranged alternately along a predetermined direction is arranged as a second pattern P2. do. These first patterns P1 and second patterns P2 are alternately arranged in parallel in a direction (lengthwise direction in this embodiment) orthogonal to a predetermined direction.

The interior material 30 provided with such cut portions 31, 31' and non-cut portions 32, 32' is a rotary die having a blade portion (cutter) having a shape corresponding to the cut portions 31, 31' on the outer periphery. It is manufactured by rotating and cutting an uncut sheet material with a cutter. Alternatively, the interior material 30 is manufactured by cutting an uncut sheet material while pressing it using a flat plate die cutter provided with a blade having a shape corresponding to the notches 31 and 31'.

As shown in FIG. 5, in the main body part 35 in the extended state, the piece part 36 around the notch part 31 rises in the thickness direction, thereby forming a three-dimensional buffer cell 37. In this way, in the main body part 35 in the extended state, one buffer cell 37 appears as the piece part 36 around one notch part 31 stands up.
Therefore, the buffer section 3 has a sheet shape when the main body section 35 is in an unextended state as shown in FIG. 2, whereas when the main body section 35 is in an extended state as shown in FIG. It has a matte shape that is thicker than a sheet. Since the mat-like buffer portion 3 is provided with a deformation allowance (buffer allowance) for cushioning, cushioning performance is ensured. Note that the buffer section 3, which has changed from a sheet-like shape to a mat-like state by stretching in the cross direction, may recover slightly due to the restoring force (the rising edge of the piece 36 returns), but basically it will become a sheet again. There will be no situation.

Here, with reference to FIG. 2, the relationship between the outer bag 10 and inner bag 20 forming the main body bag 2 and the interior material 30 forming the buffer section 3 will be described in detail.
As described above, the inner bag 20 of the present embodiment is attached to the buffer section 3 at the upper end edges 23 and 24 of the first inner surface section 21 and the second inner surface section 22, and the upper end edges 23 and It is attached to the outer bag 10 at the lower end located below 24. That is, while the inner bag 20 is attached to the outer bag 10 at the lower end, the inner bag 20 is attached to the buffer section 3 at the upper edge portions 23 and 24 of the first inner surface 21 and the second inner surface 22. It is. Therefore, in the thickness direction of the inner bag 20, the attachment position to the outer bag 10 and the attachment position to the buffer section 3 are different.

[Outer flap]
As shown in FIGS. 1 to 3, the outer flap 4 projects upward from the first surface portions 11 and 21 of the main bag 2. As shown in FIGS. Here, the outer flap 4 that protrudes upward from the first outer surface portion 11 is illustrated. The outer flap 4 is connected to the upper edge 13 of the first outer surface portion 11 .
The outer flap 4 is folded back from the first surface portions 11 and 21 of the main body bag 2 to the second surface portions 12 and 22 side, and is arranged outside the second surface portions 12 and 22 of the main body bag 2 to cover the opening 9. . The packaging bag 1 is brought into a sealed state by fixing the outer flap 4 covering the opening 9 to the outer surface of the main bag 2 (second outer surface portion 12 in this embodiment). Note that when the packaging bag 1 provided with the inner flap 5 is in a sealed state, the outer flap 4 is disposed outside the inner flap 5.

[Inner flap]
The inner flap 5 provided as necessary is a sheet-like interior material (second interior material) in which a plurality of notches 51 (second notches) extending in a predetermined direction (second predetermined direction) are provided in a staggered manner. It may be a cushioning material made of material) 50. The interior material 50 constituting the inner flap 5, which is such a cushioning material, has the same structure as the interior material 30 constituting the buffer section 3, and is also called honey paper, cushion paper, or the like. When the interior material 50 is pulled in a direction intersecting a predetermined direction in which the notches 51 extend, the interior material 50 expands by opening the eyes corresponding to the notches 51 .

The inner flap 5 shown in FIGS. 1 to 3 is provided with a sheet-like interior material 50 in a pre-stretched state that can be stretched in the cross direction (direction that intersects the second predetermined direction). In this embodiment, an inner flap 5 is exemplified in which an unstretched interior material 50 that swingably protrudes from the buffer portion 3 is provided so as to be extendable in the cross direction.
The interior material 50 provided in an unstretched state as described above is brought into an extended state by being pulled in the cross direction by a user, for example. Thereby, the inner flap 5 transforms from a sheet shape to a mat shape. Since the mat-shaped inner flap 5 is provided with a deformation allowance (buffer allowance) for cushioning, similarly to the mat-shaped buffer section 3, cushioning performance is ensured.

The inner flap 5 of this embodiment is connected to the buffer section 3. That is, the inner flap 5 and the buffer section 3 are integral and continuous with each other (not separated). Here, an example is shown in which the inner flap 5 and the outermost interior material 30 of the plurality of interior materials 30 that overlap in the thickness direction in the buffer section 3 are formed of a single member.
Like the buffer section 3, the inner flap 5 is provided with a predetermined direction in which the notch section 51 extends along the width direction of the packaging bag 1 (the predetermined direction intersects the insertion/removal direction of the article). However, the predetermined direction in which the notch 31 of the buffer section 3 extends and the predetermined direction in which the notch 51 of the inner flap 5 extends may intersect with the width direction of the packaging bag 1 or may be different from each other. . Although the number of inner flaps 5 provided in the packaging bag 1 is not particularly limited, the packaging bag 1 provided with one inner flap 5 is shown here.

In the inner flap 5 of this embodiment, the outer flap 4 protrudes between the upper edge portions 13, 23 of the first surface portions 11, 21 and the upper edge portions 14, 24 of the second surface portions 12, 22 of the main body bag 2. This is a facing flap 5C attached to the other side opposite to the provided one side. The opposing flap 5C projects from the second attachment end 34 of the buffer section 3. As described above, in the present embodiment, the inner flap 5, which is the opposing flap 5C, is attached to the upper edge 24 of the second inner surface 22 with respect to the outer flap 4 protruding from the upper edge 13 of the first outer surface 11. It is pasted.

As shown in FIG. 3, the inner flap 5 is stretched in the cross direction before the packaging bag 1 is sealed. As a result, the inner flap 5 deformed into a mat shape is folded back from the buffer section 3 toward the first surface sections 11 and 21 of the main body bag 2, and is placed inside the first sticking end 33 of the buffer section 3 to prevent the product from being stored. 8 from above (opening 9 side). The inner flap 5 is disposed between the article 8 and the outer flap 4 when the packaging bag 1 is in a sealed state, and serves as a buffer for the upper side of the article 8.
Note that the inner flap 5 provided as necessary is not particularly limited as long as it has a structure that covers the article 8 from the opening 9 side inside the outer flap 4. The inner flap 5 may be connected to the upper edge portions 14 and 24 of the second surface portions 12 and 22 of the main bag 2, or may be connected to the first sticking end portion 33 of the buffer portion 3.

[2. Action and effect]
(1) Since the buffer part 3 has at least a part of the multilayer part 3A in which a plurality of interior materials 30 are stacked in the thickness direction between the article 8 and the main bag 2, there is a case where the buffer part 3 does not have the multilayer part 3A. In comparison, the buffering properties can be improved in at least some areas. Thereby, even if the load is concentrated on a part of the buffer section 3, the protection of the article 8 can be improved because the buffer section 3 can withstand the load. Therefore, the reliability of the packaging bag 1 can be improved.

(2) Since the buffer section 3 has the multilayer section 3A throughout, the buffering properties of the entire buffer section 3 can be improved. As a result, the protection of the article 8 is improved throughout the buffer section 3, so that the reliability of the packaging bag 1 can be further improved.

(3) Since the predetermined directions of the multiple interior materials 30 stacked on top of each other in the multilayer section 3A are set to be the same, by pulling these interior materials 30 together in the cross direction, the multilayer section 3A can be pulled all at once. It becomes possible to extend it to. Therefore, it becomes easy to stretch the sheet-like buffer section 3 and transform it into a mat-like shape.
Therefore, the usability of the packaging bag 1 including the buffer section 3 in which the interior material 30 is provided in a state where it can be extended in the cross direction can be improved. Furthermore, the ease of manufacturing the packaging bag 1 including the buffer section 3 provided with the interior material 30 pre-stretched in the cross direction can be improved.

(4) The buffer section 3 is suspended between the upper end edge 23 of the first inner surface section 21 and the upper end edge 24 of the second inner surface section 22 in a posture in which a predetermined direction intersects the insertion/extraction direction of the article 8. Therefore, the interior material 30 can be expanded as the article 8 is inserted into the packaging bag 1. Therefore, before the article 8 is inserted (before the packaging bag 1 is used), the thickness of the packaging bag 1 can be suppressed by the interior material 30 forming a sheet shape, and after the article 8 is inserted (when the packaging bag 1 is used) By expanding the interior material 30 to form a mat shape, the cushioning performance of the buffer section 3 can be ensured.

[3. Modified example]
Modified examples of the packaging bag will be described below. In the description of the modification, the same reference numerals are given to elements that are the same as or correspond to the elements described in the above embodiment or other modifications, and redundant description will be omitted.

[3-1. First variation]
As shown in FIG. 6, the packaging bag 1A according to the first modification is different from the packaging bag 1 according to the above embodiment in that the inner material 30 of the buffer section 3' is pre-stretched in the cross direction. The difference is that the inner flap 5' is formed of a member different from the buffer part 3'.
The buffer section 3' of this modification is attached to the main bag 2 after the interior material 30 is stretched in the cross direction during the manufacturing process of the packaging bag 1A. The buffer portion 3' forms a mat shape not only when the packaging bag 1A is used but also before use.

Here, a buffer section 3' is illustrated that overlaps substantially the entire area of the first inner surface part 21 and substantially the entire area of the second inner surface part 22, respectively. The buffer section 3' has a multilayer section 3A over its entirety. Note that, in order to maintain the extended state more appropriately, the lower end 38 of the buffer portion 3' may be attached to the inner bag 20 in addition to the attached ends 33 and 34.
Since the buffer section 3' of this modification is provided with the interior material 30 stretched in advance as described above, it is not necessary to provide the buffer section 3' with the predetermined direction in which the notch section 31 extends intersects with the insertion/extraction direction of the article. Good too. For example, the buffer portion 3' may be provided with a predetermined direction along the length direction of the packaging bag 1A.

In this modification, the inner flap 5' and the at least one interior material 30 constituting the buffer section 3' are not formed of a single member, but are made using adhesives or adhesives, for example, in the manufacturing process of the packaging bag 1A. are attached to each other. Here, an example is shown of an inner flap 5' that is disposed inside the second attachment end 34 of the buffer section 3' and is attached to the second attachment end 34. In this way, they are separate entities and not continuous with each other. Not formed from a separate, continuous piece. Note that the inner flap 5' of this modification is also the opposing flap 5C.

According to the packaging bag 1A, since the interior material 30 is provided with the buffer section 3' which is housed inside the main bag 2 in a state in which it is stretched in the cross direction in advance, the cushioning property is improved by the mat-like buffer section 3' whether before or after use. can be appropriately secured.
Further, by forming the inner flap 5' from a member different from the buffer portion 3', the degree of freedom in arranging the inner flap 5' can be increased. Specifically, since the inner flap 5' can be arranged independently of the buffer section 3', the predetermined direction of the inner flap 5' can be made different from the predetermined direction of the buffer section 3', or the inner flap 5' can be arranged independently of the buffer section 3'. It becomes easy to arrange it away from 3'. Therefore, it becomes easy to provide inner flaps 5' of various shapes.
In addition, according to the packaging bag 1A of this modification, similar operations and effects can be obtained from the same configuration as the packaging bag 1 of the above embodiment.

[3-2. Second modification]
As shown in FIG. 7, the packaging bag 1B according to the second modification differs from the packaging bag 1A according to the first modification in that the buffer section 3' has a multilayer section 3A only in a part thereof. . More specifically, in the buffer section 3' of this modification, a sheet of interior material 30 is arranged between the article and the main bag 2 in the other parts except for the part where the multilayer part 3A is provided. It has a single layer portion 3B. Here, the multilayer part 3A is set in the lower half of the buffer part 3' (below the middle part in the length direction), and the multilayer part 3A is set in the upper half of the buffer part 3' (below the middle part in the length direction). An example in which a single layer portion 3B is set in the side portion) is shown.

However, the setting of the arrangement of the multilayer section 3A and the single layer section 3B is not limited to this. The multilayer portion 3A may be set in a portion of the buffer portion 3' where a relatively higher cushioning performance (than in other portions) is required. In other words, the single layer portion 3B may be provided in other portions of the buffer portion 3' where cushioning properties are relatively less required (than in some portions). The arrangement of the multilayer part 3A and the single layer part 3B may be set by taking into account, for example, the shape of the article to be packaged by the packaging bag 1B, the shape of the packaging bag 1B, the posture of the packaging bag 1B during transportation, etc. .

According to the packaging bag 1B, the cushioning properties can be pinpointed in a part of the buffer part 3' having the multilayer part 3A, and the material and weight can be suppressed in the other part having the single layer part 3B. Therefore, while the multilayer portion 3A enhances the protection of the article, the single layer portion 3B can suppress material costs and reduce weight.
Moreover, according to the buffer section 3' in which the multilayer section 3A is provided in the lower half, the cushioning properties of articles that are pulled toward the lower end portion 38 of the buffer section 3' due to gravity, for example, can be enhanced. Therefore, in the packaging bag 1B with the opening 9 facing upward, it is possible to ensure good protection of the article.
In addition, according to the packaging bag 1B of this modification, the same operation and effect can be obtained from the same configuration as the packaging bag 1A of the first modification.

[3-3. Third variation]
As shown in FIG. 8, a packaging bag 1C according to the third modification differs from the packaging bag 1 according to the above embodiment in that it includes a plurality of inner flaps 5. Here, a packaging bag 1C including two inner flaps 5 arranged on both sides of an opening 9 is illustrated.

The inner flaps 5 of this modification are both connected to the buffer section 3. Here, an example is shown in which the outermost interior material 30 of the plurality of interior materials 30 that overlap in the thickness direction in the buffer section 3 and the two inner flaps 5 are formed of a single member. Each inner flap 5 is provided with an interior material 50 that is extendable in the cross direction, similarly to the above embodiment.
Hereinafter, of the two inner flaps 5, one disposed on one side of the opening 9 (on the right side in FIG. 8) is also referred to as the first inner flap 5A, and one disposed on the other side of the opening 9 (on the left side in FIG. 8). The other side is also referred to as a second inner flap 5B.

The first inner flap 5A projects from the first attachment end 33 of the buffer section 3 and overlaps the inner side of the outer flap 4. The first inner flap 5A is attached to the upper edge 23 (one of the first edge and the second edge) of the first inner surface 21.
On the other hand, the second inner flap 5B is the opposing flap 5C described in the above embodiment, and is provided to protrude from the second attachment end 34 of the buffer section 3. The second inner flap 5B is attached to the upper edge 24 (the other of the first edge and the second edge) of the second inner surface 22.

Both inner flaps 5 are stretched in the cross direction before the packaging bag 1C is sealed. As a result, the first inner flap 5A, which has changed from a sheet shape to a mat shape, is folded back from the first attached end 33 of the buffer section 3 toward the second surface sections 12 and 22 of the main bag 2. Similarly, the second inner flap 5B, which has changed from a sheet shape to a mat shape, is folded back from the second attached end 34 of the buffer section 3 toward the first surface sections 11 and 21 of the main bag 2. The first inner flap 5A and the second inner flap 5B are stacked on top of each other on the outside of the article and cover the article from above (opening 9 side).

According to the packaging bag 1C, since a plurality of inner flaps 5 are provided, the cushioning properties on the opening 9 side of the article 8 can be further improved compared to a case where one inner flap 5 is provided.
Moreover, since the first inner flap 5A and the second inner flap 5B are respectively attached to the upper edge 23 of the first inner surface 21 and the upper edge 24 of the second inner surface 22, they are mutually attached on both sides of the opening 9. The two opposing inner flaps 5 allow the article to be more appropriately covered from the opening 9 side. Moreover, compared to the case where the two inner flaps 5 are arranged on the same side with respect to the opening 9, the inner flaps 5 are spaced apart from each other, making it difficult for them to interfere with each other. This facilitates the work of covering each inner flap 5 over the opening 9 side of the article 8, thereby improving the workability of sealing the packaging bag 1C.
In addition, according to the packaging bag 1C of this modification, the same operation and effect can be obtained from the same configuration as the packaging bag 1A of the first modification.

[3-4. Fourth modification]
As shown in FIG. 9, the packaging bag 1D according to the fourth modification is different from the packaging bag 1C according to the third modification in that the second inner flap 5B is attached to the first inner flap 5A. different. That is, in the packaging bag 1D of this modification, the two inner flaps 5 are arranged on the same side with respect to the opening 9 and overlapped with each other.

According to the packaging bag 1D, the first inner flap 5A and the second inner flap 5B are integrally moved (in one motion) from the first sticking end 33 of the buffer section 3 to the second surface sections 12 and 22 of the main bag 2. Since it can be folded back, sealing work efficiency can be improved. Further, by arranging the plurality of inner flaps 5 only on one side of the opening 9, it is possible to improve the protection of the article and also improve the workability of inserting and removing the article into the opening 9. Therefore, both the reliability and usability of the packaging bag 1D can be improved.
In addition, according to the packaging bag 1D of this modification, the same operation and effect can be obtained from the same configuration as the packaging bag 1C of the third modification.

[3-5. others]
The predetermined direction in which the notches 31 and 51 extend in the interior materials 30 and 50 is not limited to the width direction of the packaging bag. For example, the interior materials 30 and 50 may be provided with a predetermined direction along the length direction of the packaging bag.

Furthermore, the plurality of interior materials 30 stacked in the multilayer portion 3A of the buffer portions 3, 3' may be set in different predetermined directions. For example, as shown in FIG. 10, the two interior materials 30 overlapped in the multilayer part 3A have a predetermined direction inclined with respect to the width direction of the packaging bag, and the directions of inclination are opposite to each other (inclination with respect to the width direction). The positive and negative angles may be opposite.

The multilayer section 3A, which is composed of a plurality of interior materials 30 whose predetermined directions are set to be different from each other, can also be extended in the length direction if the predetermined directions intersect with the length direction of the packaging bag. Therefore, when the buffer section having such a multilayer section 3A is also suspended in the same way as in the above embodiment, it can be extended in the length direction by the weight of the article placed in the packaging bag from the opening 9.

In the multilayer part 3A in which the predetermined directions of the interior materials 30 are set to be different from each other, the periphery of the notch 31 rises in various directions when each interior material 30 is expanded, so that the thickness can be more appropriately secured. This increases the cushioning properties, thereby further increasing the reliability of the packaging bag.
In addition, in the multilayer part 3A, three or more interior materials 30 may be stacked in the thickness direction. The inner flap 5 is also similar to the buffer part 3, and the inner flap 5 may be provided in a pre-extended state in the cross direction, or a plurality of inner flaps 5 may be set in different predetermined directions. However, three or more inner flaps 5 may be provided in the packaging bag.

The method of attaching the buffer section 3 to the inner bag 20 is not limited to attachment using adhesive or adhesive. Furthermore, the positions at which the inner bag 20 is attached to the outer bag 10 and the interior material 3 are not limited to the above-mentioned positions. The attachment position of the inner bag 20 to the outer bag 10 and the attachment position to the buffer section 3 may overlap when viewed in the thickness direction.
The inner bag 20 does not need to be fixed to the outer bag 10. In other words, the inner bag 20 may be provided to be detachable from the outer bag 10. When the inner bag 20 is not fixed to the outer bag 10, the transmission of force between the outer bag 10 and the inner bag 20 is suppressed and stress concentration is less likely to occur, so that the inner bag 20 and the buffer section 3 Even if stress concentration occurs at the attachment part, damage to the outer bag 10 can be more reliably suppressed. Therefore, the reliability of the packaging bag can be further improved.

Although not shown, the main body bag 2 has at least one of the upper edge portions 13 and 23 of the first surface portions 11 and 21 and at least one of the upper edge portions 14 and 24 of the second surface portions 12 and 22. It can also be used as a handheld paper bag by providing a handle.
Regarding the outer bag 10, the inner bag 20, and the buffer section 3 (interior material 30), the relationship of the adhesion forces mentioned in the above embodiment is just an example.
The main body bag 2 may have a single layer structure. Moreover, one or both of the outer flap 4 and the inner flap 5 may be omitted.

1, 1A, 1B, 1C, 1D Packaging bag 2 Main bag (exterior body)
3, 3' Buffer section 3A Multilayer section 3B Single layer section 4 Outer flaps 5, 5' Inner flap 5A First inner flap 5B Second inner flap 5C Opposing flap 8 Article 9 Opening 10 Outer bag (outer material)
11 First outer surface portion 12 Second outer surface portion 13 Upper edge portion 14 Upper edge portion 15 Lower edge portion 16 End portion in the width direction 20 Inner bag (inner material)
21 First inner surface part (first surface part)
22 Second inner surface part (second surface part)
23 Upper edge (first edge)
24 Upper edge (second edge)
30 Interior material (first interior material)
31, 31' Notch part (first notch part)
32, 32' Non-cut portion 33 First pasted end 34 Second pasted end 35 Main body 36 Piece 37 Buffer cell 38 Lower end 50 Interior material (second interior material)
51 Notch part (second notch part)
L1 Dimension of notch part L2 Dimension of non-notch part P1 First pattern P2 Second pattern

Claims (6)

A bag-like exterior body having an opening and a sheet-like first interior material in which a plurality of notches extending in a first predetermined direction are provided in a staggered manner are extendable in a direction intersecting the first predetermined direction. A packaging bag for packaging an article, the packaging bag comprising: a buffer section built into the exterior body in a state of
an outer flap that protrudes from the exterior body and covers the opening;
an inner flap that is disposed inside the outer flap and covers the article from the opening side in a sealed state;
The buffer section has at least a part of a multilayer section in which a plurality of sheets of the first interior material are stacked in the thickness direction between the article and the exterior body ,
The inner flap is composed of a sheet-like second interior material in which a plurality of notches extending in a second predetermined direction are provided in a staggered manner, and is expandable in a direction intersecting the second predetermined direction. established
A packaging bag characterized by: The packaging bag according to claim 1, wherein the buffer section has the multilayer section over its entirety. 2. The buffer section has a single-layer section in which a sheet of the first interior material is disposed between the article and the exterior body in a portion other than the portion. packaging bag. The packaging bag according to any one of claims 1 to 3, wherein the first predetermined direction of the plurality of first interior materials stacked in the multilayer portion is set to be different from each other. . The packaging bag according to any one of claims 1 to 3, wherein the first predetermined direction of the plurality of first interior materials stacked in the multilayer portion is set to be the same as each other. . The exterior body has a first surface portion having a first edge portion disposed on one side of the opening, and a second edge portion disposed on the other side of the opening. A second surface portion facing each other,
10. The buffer portion is suspended between the first end edge portion and the second end edge portion in a posture in which the first predetermined direction intersects with the insertion/extraction direction of the article. 5. The packaging bag described in any one of 5.

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