JP6973547B2 - Manufacturing method of packaging bag - Google Patents

Description

The present invention relates to a method of manufacturing a bag for packaging an article.

Conventionally, in order to protect an article to be packaged, a packaging bag decorated with a mat-like cushioning material such as an air cushion provided with a plurality of air chambers or a foam cushion formed by foaming has been developed. For example, a bag making method in which an interior air cushion is attached to an exterior bag has been proposed (see Patent Document 1).

Japanese Unexamined Patent Publication No. 2004-26160

By the way, not only a mat-shaped cushioning material but also a sheet-shaped cushioning material is known. Specifically, a sheet-shaped cushioning material (also referred to as "cushion paper" or "honey paper") in which a plurality of notches are arranged in a staggered manner along the same direction is known. When this cushioning material is stretched in a direction intersecting the extending direction of the notch portion, a sheet piece around the notch portion rises and a cushioning allowance is formed in the thickness direction before stretching.
However, the method for manufacturing a packaging bag using a mat-shaped cushioning material in which a cushioning allowance in the thickness direction is provided in advance as described above does not take into consideration the elongation of the cushioning material for forming the cushioning allowance, and thus is in the form of a sheet. It cannot be directly applied to the production of packaging bags using the cushioning material of.

This case was devised in view of the above-mentioned problems, and one of the purposes is to be able to manufacture a packaging bag using a sheet-shaped cushioning material in which a cushioning allowance appears when stretched. do. Not limited to this purpose, it is also possible to exert actions and effects derived from each configuration shown in the "mode for carrying out the invention" described later, which cannot be obtained by the conventional technique. It can be positioned as another purpose.

The method for manufacturing a packaging bag disclosed here is formed by two face portions facing each other, an opening formed by each one end edge portion in the vertical direction of the face portion, and each other end edge portion in the vertical direction of the face portion. In the first supply step of supplying a sheet-shaped exterior material to be a bag-shaped exterior body having a bottom portion, and at a folding portion along the lateral direction of one of the surface portions of the exterior material supplied in the first supply step. The first bending process of bending and a plurality of notches extending along a predetermined direction are provided in a staggered manner, and a sheet-shaped interior material to be an interior body to be installed in the exterior body intersects the predetermined direction. The second supply step of supplying without extending in the direction, the surface portion bent in the first bending step and the other surface portion are overlapped, and the folding is performed between the one end edges of the two surface portions. In the state where the portions are arranged, the exterior edge regions set for each of the one-end edges and the both-end edges of the interior material supplied in the second supply step in the direction intersecting the predetermined directions are set. After the bonding step of bonding the interior edge regions and the bonding step, the folded portion is returned to a flat shape and the interior material is bent at the folded line portion along the predetermined direction to form two of the surface portions. It includes a folding step in which the interior material is interposed between them.

According to the method of manufacturing the packaging bag of this case, the elongation of the interior material is taken into consideration, and by bending one surface of the exterior material and then bonding it to the interior material, the sheet is stretched to generate a cushioning allowance. It is possible to manufacture a packaging bag using a shaped interior material.

It is a perspective view which shows the packaging bag when it is not used. It is a vertical sectional view of FIG. It is a top view which shows the main part of the cushioning part in an unstretched state in an enlarged manner. It is a vertical sectional view which shows the packaging bag at the time of use. It is a perspective view which shows the main part of the cushioning part in a stretched state in an enlarged manner. FIG. 5 is a cross-sectional view showing a cross section taken along the line AA of FIG. It is a top view of the sheet material which constitutes the packaging bag which concerns on one Embodiment. (A) shows a plan view of the sheet material constituting the main body bag, (B) shows a plan view of the sheet material of (A) folded in a Z shape, and (C) shows a buffer. The plan view of the sheet material which constitutes a part is shown. It is a schematic diagram explaining the manufacturing method of the packaging bag which concerns on one Embodiment. (A) shows the first supply step and the bending step, (B) shows the applying step, (C) shows the second feeding step and the bonding step, and (D) and (E) show. The folding back process is shown, and (F) shows another bag making process. It is a flowchart explaining the manufacturing procedure of the packaging bag which concerns on one Embodiment. It is a top view of the sheet material which constitutes the main body bag of the packaging bag which concerns on one modification. (A) shows a plan view of each sheet material, and (B) shows a plan view of a state in which one sheet material of (A) is bent and then superposed on the other sheet material. It is a schematic diagram explaining the manufacturing method of the packaging bag which concerns on one modification. (A) shows the first supply process, the first bending process and the arrangement process, (B) shows the second supply process, (C) shows the thermocompression bonding process, and (D) shows the folding process. The return step is shown, and other bag making steps are shown in (E) and (F). It is a flowchart explaining the manufacturing procedure of the packaging bag which concerns on one modification.

A packaging bag as an embodiment relating to a method for manufacturing a packaging bag 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 of excluding the application of various modifications and techniques not specified in the following embodiments. Each configuration of the present embodiment can be variously modified and implemented without departing from the gist thereof. In addition, it can be selected as needed, or it can be combined as appropriate.

A packaging bag is a bag for packaging an article. In the present embodiment, a packaging bag in which a cushioning portion for protecting an article to be packaged is provided in the main body bag will be described. The main body bag (exterior body) and cushioning part (interior body) constituting this packaging bag are kraft paper, high-quality paper, medium-quality paper, art paper, coated paper, cast-coated paper, inkjet recording paper, kurupack paper, liner, etc. Paper such as white paperboard and paperboard, laminated paper in which thermoplastic resin such as polyethylene resin is laminated on one or both sides of these papers, non-woven fabrics such as spunbond and spunlace, and sheet materials such as plastic sheets such as synthetic paper and film. It can be formed from kraft paper, and it is particularly preferable to use kraft paper or kurupack paper.
The body bag and cushioning part are preferably made of the same material such as paper or resin. However, the main body bag and the cushioning portion may be formed of different materials.

In the present embodiment, the packaging bag to be manufactured will be described first, and the sheet material assembled into the packaging bag will be described. After that, a method for manufacturing a packaging bag will be described.
The description of the packaging bag describes the packaging bag with the openings arranged upward. The direction of action of gravity is downward, and the opposite direction below is upward.

In the description of the sheet material, the sheet material in a state of being placed on a horizontal plane will be described. This sheet material will be described using the X direction (horizontal direction) and the Y direction (vertical direction) that are orthogonal to each other in the horizontal direction. Each of the X and Y directions extends in two directions opposite to each other. Therefore, for each of the X and Y directions, one is indicated by a subscript with a "1" and the other is indicated by a subscript with a "2". For example, one of the X _{directions is indicated as the X 1} direction, and the other is indicated as the X ₂ direction.
The method for manufacturing a packaging bag exemplifies a form in which a strip-shaped continuum used as an interior material serving as a shock absorber is unwound. This feeding direction coincides with the longitudinal direction of the continuum (the direction in which the band extends) and is called the MD direction. The direction orthogonal to the MD direction coincides with the band width direction of the continuum and is called the CD direction.

[1. Packaging bag configuration]
First, the main body bag 10 of the packaging bag will be described with reference to FIGS. 1 and 2.
The main body bag 10 is provided in an envelope type without a gusset having an opening 9 opened and closed by a flap 19 formed on the upper portion. Here, a square envelope is illustrated as the main body bag 10, but a long envelope, a Western-shaped envelope, or a non-standard envelope may be used for the main body bag.
The main body bag 10 is provided with a first surface portion 11 and a second surface portion 12 facing each other.

These face portions 11 and 12 are connected to each other at the bottom portion 13 provided below the opening 9 in the main body bag 10 and the two side portions 14 and 15 erected so as to connect the bottom portion 13 and the opening 9. Will be set up. Further, the upper end edge portion (one end edge portion) 110 of the first surface portion 11 is arranged on one side of the opening 9 (upper right side in FIG. 1), and the upper end edge portion (one end edge portion) 120 of the second surface portion 12 is opened. It is arranged on the other side of 9 (lower left side in FIG. 1). The opening 9 is partitioned by the upper end edge portion 110 of the first surface portion 11 and the upper end edge portion 120 of the second surface portion 12. Further, the bottom portion 13 is formed by connecting the lower end edge portion (the other end edge portion) 130 of the first surface portion 11 and the lower end edge portion (the other end edge portion) 140 of the second surface portion 12.
Further, a flap 19 is continuously provided on the first surface portion 11 so as to project upward.

Next, the cushioning portion 20 of the packaging bag will be described.
The cushioning portion 20 is also referred to as cushion paper or honey paper, and is a sheet-shaped cushioning material in which a plurality of notched portions 23a are provided in a staggered manner.
Further, the cushioning portion 20 is built in the main body bag 10 and is suspended between the upper end edge portion 110 of the first surface portion 11 and the upper end edge portion 120 of the second surface portion 12.

The cushioning portion 20 is suspended (suspended state) between the sticking end portions 21 and 22 attached to the upper end edges 110 and 120 of the surface portions 11 and 12 and the pasting end portions 21 and 22. It is roughly classified into two types of parts, that is, the main body portion 23 provided inside the main body bag 10.
Here, the first sticking end portion 21 is attached to the inner surface 111 of the upper end edge portion 110 of the first surface portion 11, and similarly, the first sticking end portion 21 is attached to the inner surface 121 of the upper end edge portion 120 of the second surface portion 12. The second sticking end portion 22 is stuck. On the other hand, the main body 23 is not attached to any part.

Further, the cushioning portion 20 in a state of being folded in half at the central folded line portion 230 in the suspension direction connecting the first pasting end portion 21 and the second pasting end portion 22 along the cushioning portion 20 is illustrated.
As shown in FIG. 2, the main body 23 of the cushioning portion 20 folded in half in this way has the first main body 231 and the second sticking end 22 on the side of the first sticking end 21 with the folded line 230 interposed therebetween. It is roughly divided into two parts, the second main body part 232 on the side.

Further, the main body 23 is stretched by the weight of the article 1 by placing the article 1 (see FIG. 4) placed in the packaging bag through the opening 9.
That is, before the article 1 is put in the packaging bag (when the packaging bag is not used), the shock absorber 20 is not stretched (hereinafter referred to as "unstretched state"), and the article 1 is put in the packaging bag. After that (when the packaging bag is used), the shock absorber 20 is in an stretched state (hereinafter referred to as "stretched state").
The structure that makes the buffer portion 20 extendable is provided in the main body portion 23.
Hereinafter, the main body 23 in the unstretched state will be described, and then the main body 23 in the stretched state will be described.

First, the main body 23 in the unstretched state will be described with reference to FIG.
A large number of notches 23a are cut into the main body 23. These cut portions 23a are provided in at least the main body portion 23 of the cushioning portions 20.
The notch portion 23a extends in a direction (hereinafter referred to as "width direction") orthogonal to the suspension direction (here, the vertical direction).

The cut portions 23a are provided intermittently side by side along the width direction. That is, a non-cut portion 23b that is not cut is provided between the cut portions 23a adjacent to each other in the width direction.
The widthwise dimension of the notch 23a is set to be larger than the widthwise dimension of the non-notch 23b. That is, if the dimension of the notch portion 23a is "L ₁ " and the dimension of the non-notch portion 23b is "L ₂ ", the inequality 1 "L ₁ > L ₂ " is satisfied.

Here, notch 23a and the non-slit portion 23b is the first pattern P ₁ an arrangement of row provided arranged alternately along the width direction. In addition, the notch 23a'and the non-notch 23b'arranged half pitch apart from the notch 23a and the non-notch 23b of _{the first pattern P 1 are provided alternately along the width direction.} the arrangement of the rows and the second pattern P _2. These first pattern P ₁ and second pattern P ₂ are provided alternately side by side along the suspension direction.

Speaking in detail, the 'width direction center C _b' of the non-slit portion 23b in the widthwise center C _a and the second pattern P ₂ of the cut portion 23a in the first pattern P ₁ is arranged along the suspension direction NS. _{Similarly, the widthwise center C b} of the non-cut portion 23b in the first pattern P _{1 and the width direction center C a} ′ of the cut portion 23a ′ in the second pattern P ₂ are arranged side by side along the suspension direction.

The buffer portion 20 having the main body portion 23 provided with such cut portions 23a, 23a'and non-cut portions 23b, 23b' has a blade portion (cutter) having a shape corresponding to the cut portions 23a, 23a'on the outer periphery. It is manufactured by cutting the uncut sheet material while rotating it by the provided rotary die cutter. Alternatively, the cushioning portion 20 is manufactured by cutting the uncut sheet material while pressing it with a flat plate die cutter provided with a blade portion having a shape corresponding to the cut portions 23a, 23a'.

The sheet piece in one of the suspension directions (upper in FIG. 3) with respect to the notch 23a of the first pattern P _{1 is the first piece depending on the position of the second pattern P 2} with respect to the notch 23a'and the non-notch 23b'. It is roughly divided into a part 31, a second piece part 32 and a third piece part 33.
The first piece portion 31 is _{one of the notches 23a of the first pattern P 1 in} the width direction (left in FIG. 3) and the other of the notches 23a of the second pattern P _{2 in} the width direction (right in FIG. 3). ) And the part sandwiched between them. The second piece portion 32 is a portion sandwiched between the center of the notch portion 23a of _{the first pattern P 1 in the width direction and the non-notch portion 23b'of the second pattern P 2.} The third piece portion 33 is a portion sandwiched between the notch portion 23a of _{the first pattern P 1 in} the width direction and the notch portion 23a ′ of _{the second pattern P 2 in the width direction.}

Further, the other sheet piece in the suspension direction with respect to the notch portion 23a of the first pattern P ₁ is the fourth piece portion 34, the fifth piece portion 35 and the fifth piece portion, similarly to the above-mentioned piece portions 31, 32, 33. It is roughly divided into six pieces 36.
The fourth piece portion 34 is _{sandwiched between one of the notch portions 23a of the first pattern P 1 in} the width direction and the other of the _{notch portions 23a'of the second pattern P 2} in the width direction. The fifth piece portion 35 is sandwiched between the center of the notch portion 23a of _{the first pattern P 1} in the width direction and the non-notch portion 23b'of _{the second pattern P 2.} The sixth piece portion 36 is sandwiched between the notch portion 23a of _{the first pattern P 1 in} the width direction and the notch portion 23a ′ of _{the second pattern P 2 in the width direction.}

Subsequently, the main body 23 in the stretched state will be described with reference to FIGS. 4, 5, and 6.
As shown in FIG. 4, the main body 23 in the stretched state is extended in the suspension direction as compared with the main body 23 in the non-stretched state. At this time, in the main body 23, the pieces 31 to 36 (see FIGS. 5 and 6) stand up from the suspension direction to the thickness direction of the face portions 11 and 12 (the thickness direction of the main body 23 in the non-stretched state), and the pieces stand up. The three-dimensional buffer cells 40 are formed by the portions 31 to 36. In other words, one buffer cell 40 appears when the one pieces 31 to 36 arranged around the notch 23a stand up.

More specifically, as shown in FIG. 5, the first wall portion 41 corresponding to the first piece portion 31, the second wall portion 42 corresponding to the second piece portion 32, and the third corresponding to the third piece portion 33. The fourth wall portion 44 corresponding to the wall portion 43, the fourth piece portion 34, the fifth wall portion 45 corresponding to the fifth piece portion 35, and the sixth wall portion 46 corresponding to the sixth piece portion 36 are hexagonal cylinders. It is erected in the buffer cell 40 so as to form each side wall.

In the state where the main body 23 is geometrically most stretched (hereinafter referred to as "maximum stretched state") within a range where the main body 23 is not damaged, the first wall portion 41 and the fourth wall portion 44 are along the same plane and the third wall. The portion 43 and the sixth wall portion 46 face the first wall portion 41 and the fourth wall portion 44 along the other coplanar surface. Therefore, in the buffer cell 40 in the maximum extended state, wall portions 41 to 46 are erected so as to form each side wall of the square cylinder.

As described above, in the main body 23 after being stretched, the main body 23 before being stretched has a sheet shape, whereas the main body 23 is thicker than this sheet shape (hereinafter referred to as “mat shape”). Make an eggplant. A deformation allowance for cushioning, that is, a buffering allowance is formed in the mat-shaped main body portion 23 whose dimensions in the thickness direction are secured in this way. As described above, the form of the main body portion 23 changed from the unstretched state to the stretched state changes from a sheet shape to a mat shape by stretching. Basically, the main body 23 that has changed from a sheet shape to a mat shape does not become a sheet shape again, and the shape of the main body 23 is irreversibly changed only by a slight restoration by the restoring force.

Further, as shown in FIG. 4, the cushioned portion 20 in the stretched state is provided in a non-contact manner with the bottom portion 13 of the main body bag 10.
Specifically, it is provided so that the folded wire portion 230 located at the lowermost position in the cushioning portion 20 in the maximum stretched state and the bottom portion 13 of the main body bag 10 do not come into contact with each other. In other words, the vertical dimension between the upper ends 21a and 22a of the pasted end portions 21 and 22 and the bottom portion 13 of the main body bag 10 of the cushioning portion 20 is set to "M ₁ ", and the upper ends 21a and 22a and the cushioning portion in the maximum extended state are set. Assuming that the vertical dimension between the folded line portion 230 and the fold line portion 20 is "M ₂ ", the inequality 2 "M ₁ > M ₂ " is satisfied.

Further, it is preferable to satisfy this inequality 2 and _{set "M 2} " as large as possible to bring it closer _{to "M 1".}
Conversely, as shown in FIG. 2, the folded line portion 230 in the unstretched cushioning portion 20 is the bottom portion 13 of the main body bag 10 so that the cushioning portion 20 in the maximum stretched state does not come into contact with the bottom portion 13 of the main body bag 10. With respect to the _{above, a predetermined dimension "M 3} " is provided above in advance. That is, the cushioning portion 20 is formed short in anticipation of the elongation allowance.

Subsequently, with reference to FIG. 4, an example of setting the dimensions of the shock absorber 20 for realizing the above-mentioned non-contact structure will be described.
_{If the number of lines of the patterns P 1} and P ₂ in the buffer portion 20 is "N" and the vertical dimension of the pasted end portions 21 and 22 is "M ₄ ", the approximate expression 3 "M _2- M ₄ ≈ (L ₁₎ −L ₂ ) × (N / 4) ”is established.
The left side of the approximate expression 3 represents the vertical dimension of the first main body portion 231 or the second main body portion 232 in the maximum extended state.
_{On the other hand, (L 1 −} L ₂ ) on the right side of the approximate expression 3 is the suspension direction dimension per buffer cell 40 in the maximum extension state, that is, the suspension direction of the first wall portion 41 and the fourth wall portion 44. Represents the dimensions.

Further, since the number of buffer cells 40 arranged in the suspension direction in the main body 23 is _{half (N / 2) of the number of rows of patterns P 1} and P ₂ , (N / 4) on the right side of the approximate expression 3 is , The number of buffer cells 40 arranged in the suspension direction in the first main body portion 231 or the second main body portion 232 is represented.
Here, if the dimensions of the second wall portion 42 and the fifth wall portion 45 extending in the width direction in the suspension direction are ignored, the number of buffer cells 40 arranged in the suspension direction in the first main body portion 231 or the second main body portion 232 (N). The value obtained by multiplying / 4) by the suspension direction dimension (L _{1 −} L ₂ ) per buffer cell 40 in the maximum stretched state (the right side of the approximate expression 3) is the first main body portion 231 or the second main body portion 232. It can be said that it is close to the vertical dimension in the maximum extension state of.

Therefore, it corresponds to each item in the approximate expression 3 such as _{the width direction dimensions L 1} , L _{2 of} the notched portion 23a or the non-notched portion 23b, the number of lines of the patterns P ₁ , P _{2 , and the vertical dimension M 4} of the pasted end portions 21 and 22. The above-mentioned non-contact structure can be designed by appropriately setting the parameters to be used.

[2. Composition of sheet material]
Next, the sheet material assembled in the above-mentioned packaging bag will be described with reference to FIG. 7.
This sheet material is composed of two members, a main body sheet material 10S assembled in the main body bag 10 and a cushioning sheet material 20S assembled in the cushioning portion 20. That is, in the packaging bag, the main body bag 10 having the first surface portion 11 and the second surface portion 12 and the cushioning portion 20 are separate members, and the two members of the main body sheet material 10S and the cushioning sheet material 20S are attached and assembled. Be done.
Hereinafter, the configuration of the cushioning sheet material 20S will be described after describing the configuration of the main body sheet material 10S.

<Main body sheet material>
As shown in FIG. 7A, the main body sheet material 10S is provided with three horizontal ruled lines R _X1 , R _X2 , and R _X3 (folding curves) extending in the X direction side by side in the Y direction. Two extending vertical ruled lines _RY1 and _RY2 (folding curves) are provided side by side in the X direction. The horizontal ruled lines R _X1 , R _X2 , and R _{X 3} are arranged in this order in the _{Y 2 direction.} In other words, than the first horizontal rule R _X1 is second horizontal rule R _X2 are arranged in Y ₂ direction side, than the second horizontal lines R _X2 is the third horizontal rule R _X3 are arranged in a Y ₂ direction. Further, in the vertical ruled lines R _Y1 and R _Y2 , one of the first vertical ruled lines R _Y1 is arranged on the X ₁ direction side with respect to the other second vertical ruled line R _{Y 2.}

Of the three horizontal ruled lines R _X1 , R _X2 , and R _X3 , the first horizontal ruled line R _X1 is a folding curve for sealing the main body bag 10, and the second horizontal ruled line R _X2 is a bag-shaped body sheet material 10S. It is a fold curve for assembling. On the other hand, the third horizontal ruled line R _X3 is a fold curve for facilitating the bonding of the main body sheet material 10S with the cushioning sheet material 20S. Although the third horizontal ruled line R _X3 is not essential for assembling the main body sheet material 10S, it has a function of facilitating the manufacture of the packaging bag.

The main body sheet material 10S is assembled into the main body bag 10 by being bent by _{the second horizontal ruled line R X2} and the two vertical ruled lines R _Y1 and R _Y2, and the opening 9 is opened by being bent by _{the first horizontal ruled line R X1.} It will be blocked. The second horizontal ruled line R _X2 is a folding curve corresponding to the bottom portion 13 of the main body bag 10 (see FIGS. 1 and 2, a portion facing the opening 9).

The first horizontal ruled line R _X1 and the second horizontal ruled line R _X2 and the two vertical ruled lines R _Y1 and R _Y2 form a rectangular outline that divides the first sheet piece 11S corresponding to the first surface portion 11.
A flap sheet piece 19S corresponding to the flap 19 is continuously provided on the Y _{1 direction side via the first horizontal ruled line R X1} on the Y direction side with respect to the first sheet piece 11S _{, and the second horizontal ruled line R X 2} is provided. second sheet piece 12S corresponding to the second surface portion 12 in the Y ₂ direction side through is continuously provided.
The second sheet piece 12S, the inner second sheet piece 121S provided on the Y ₁ direction relative to the third horizontal lines R _X3, outwardly Y ₂ direction relative to the third horizontal lines R _X3 second sheet The piece 122S is provided.

Further, each of X ₁ direction and X ₂ direction with respect to the first sheet piece 11S, is continuously provided the margin sheet piece 18S via the vertical ruled R _Y1, R _Y2. Margin sheet piece 18S is affixed on the surface of the second sheet piece 12S (corresponding to the outer surface of the second surface portion 12) facing the when the body sheet 10S is bent in a second horizontal lines R _X2.
Further, the Y ₁ direction side edge of the first sheet piece 11S, the first body pasting area 110S to be pasted in buffer sheet member 20S is set. Similarly, the second main body to which the cushioning sheet material 20S is attached is attached to the end edge of the second sheet piece 12S on the Y ₂ direction side (that is, the end edge of the outer second sheet piece 122S on the Y _{2 direction side).} Area 120S is set. The main body sticking areas 110S and 120S are areas corresponding to the inner surfaces 111 and 121 of the upper end edge portions 110 and 120 of the above-mentioned surface portions 11 and 12. That is, the main body sticking areas 110S and 120S are provided on the inner surface of the main body bag 10 among the surfaces of the first sheet piece 11S and the second sheet piece 12S.

The main body sheet material 10S is folded in a Z shape when viewed from the X direction by being bent in opposite directions by _{the second horizontal ruled line R X2} and the third horizontal ruled line R _X3 in the manufacturing process of the packaging bag. Is done. As shown in FIG. 7B, in the main body sheet material 10S folded in a Z shape, the first sheet piece 11S, the inner second sheet piece 121S, and the outer second sheet piece 122S overlap in this order. Be placed.
Further, in the main body sheet material 10S folded in a Z shape in this way, a folded portion 16 corresponding to _{the third horizontal ruled line R X3} is provided in a substantially intermediate portion between the main body pasting areas 110S and 120S separated from each other in the Y direction. It is formed. The folded portion 16 is a portion of the surface of the second sheet piece 12S where the inner surface (inner surface of the second surface portion 12) of the main body bag 10 is folded in a mountain.
In the state where the main body sheet material 10S is folded in a Z shape, the dimension L ₃ between the main body attachment areas 110S and 120S is shorter than in the unfolded (unfolded) state.

<Cushioning sheet material>
As shown in FIG. 7 (C), each end of the Y ₁ direction and Y ₂ direction side of the buffer sheet member 20S, body attaching area 110S, buffer pasting area that is adhered to 120S (exterior edge area) 21S and 22S (interior edge area) are set. The cushioning pasting areas 21S and 22S are areas corresponding to the pasting end portions 21 and 22 of the buffering portion 20 described above. The cushioning application areas 21S and 22S are not provided with the notch 23a.
_{Further, the cushioning sheet material 20S is provided with a fourth horizontal ruled line R X4} extending in the X direction (predetermined direction) at the center in the Y direction. The fourth horizontal ruled _{line R X4} is a folding curve corresponding to the folding line portion 230.

A main body sheet piece 23S corresponding to the main body portion 23 is provided in a region of the cushioning sheet material 20S excluding the cushioning pasting areas 21S and 22S. The notch portion 23a described above is provided in the main body sheet piece 23S in a staggered manner. Each notch 23a extends along the X direction.
Further, the main body sheet piece 23S, the first body sheet piece 231S corresponding to the first body 231 is provided for the fourth horizontal lines R _X4 to Y ₁ direction. On the other hand, a second main body sheet piece 232S corresponding to the second main body portion 232 is provided on the _{Y 2} direction side with respect to the fourth horizontal ruled line R _X4.

_{As shown in FIGS. 7B and 7C, the dimension L 4} between the cushioning application areas 21S and 22S of the cushioning sheet material 20S is the main body sheet material 10S in a Z-shaped folded state as described above. It is equal to _{the dimension L 3} between the main body attachment areas 110S and 120S. In other words, the position of the third horizontal ruled line R _X3 (folded portion 16) in the main body sheet material 10S is set in the Y direction so that the _{above dimensions L 3} and L _{4 are equal to each other.}

When the main body sheet material 10S and the cushioning sheet material 20S folded in a Z shape are overlapped and arranged by the setting of the third horizontal ruled line R _{X3, the first main body sticking area 110S and the first cushioning sticking area 21S} And the second body sticking area 120S and the second buffer sticking area 22S overlap with each other. Therefore, it becomes easy to bond the main body sticking areas 110S and 120S and the buffer sticking areas 21S and 22S. In the state where the main body sticking areas 110S and 120S and the buffer sticking areas 21S and 22S are arranged so as to _{overlap each other, the folded portion 16 (third horizontal ruled line R X3} ) and the fourth horizontal ruled line R _X4 also overlap each other.

[3. How to use the packaging bag]
Next, how to use the packaging bag will be described.
As shown in FIGS. 1 and 2, the flap 19 is first opened to open the opening 9, and the main body bag 10 is opened.

Then, the article 1 is put in the packaging bag, and the article 1 is placed or inserted in the main body 23 of the shock absorber 20. At this time, as shown in FIG. 4, the main body 23 of the cushioning portion 20 extends in the suspension direction, so that the single portions 31 to 36 around the notch 23a rise in the thickness direction of the surface portions 11 and 12, and FIGS. 5 and 5 and FIGS. As shown in 6, the buffer cell 40 appears in the main body 23.
Then, the flap 19 is attached to the upper end edge portion 120 of the second surface portion 12 of the main body bag 10 to seal the packaging bag. At this time, the article 1 is surrounded by the buffer cell 40.

[4. Packaging bag manufacturing method]
Next, a method for manufacturing a packaging bag will be described.
As described above, in the packaging bag to be manufactured by this method, when the cushioning portion 20 is extended by the article 1, the buffering cell 40 stands up and appears, and changes to a state in which the cushioning function is exhibited. Conversely, since the cushioning portion 20 in the unstretched state is in the form of a sheet, it is unused as compared with a packaging bag using a cushioning material provided with a deformation allowance for cushioning such as an air cushion and a foam cushion. It is possible to suppress the bulkiness of the packaging bag at times.

Therefore, in the manufacturing method described in detail below, this interior material is attached to the exterior material to be the main body bag 10 without extending the interior material to be the cushioning portion 20.

In the manufacturing method exemplified here, a sheet-leaf-shaped main body sheet material 10S cut out in advance is used as the exterior material to be the main body bag 10. On the other hand, as the interior material to be the cushioning portion 20, a strip-shaped continuous body (hereinafter referred to as "interior raw fabric") is used, and a single-leaf cushioning sheet material 20S is obtained by cutting the unwound interior raw fabric. ing.
The arrangement of the interior fabric is not particularly limited as long as it can be extended. For example, examples of the state in which the interior fabric is arranged include a wound state and a Z-shaped folded state. Here, an example is an interior fabric in a wound state.

The interior fabric cut by the cushioning sheet material 20S is provided with a plurality of notches 23a extending along the MD direction (predetermined direction) in a staggered manner.
The interior fabric used here is not folded and is in a single layer state.

Hereinafter, the manufacturing method according to the present embodiment will be described step by step with reference to FIG.
First, as shown in FIG. 8A, the main body sheet material 10S is supplied, and the supplied main body sheet material 10S is folded into a Z shape. Specifically, the main body sheet material 10S is bent in opposite directions at _{the second horizontal ruled line R X2} and the third horizontal ruled line R _X3. As a result, the first sheet piece 11S, the inner second sheet piece 121S, and the outer second sheet piece 122S are stacked in this order, and the bottom portion 13 and the folded portion 16 are formed. The folded portion 16 is arranged between the main body attachment areas 110S and 120S.

Next, as shown in FIG. 8B, an adhesive is applied to each of the main body sticking areas 110S and 120S in the main body sheet material 10S folded in a Z shape. Here, the adhesive is applied to each of the main body sticking areas 110S and 120S at the same time.
A known adhesive or adhesive (hereinafter abbreviated as "adhesive") may be used when the cushioning sheet material 20S is attached to the main body sheet material 10S or when the main body sheet material 10S is glued into a bag shape. can. The application of the adhesive includes various application forms such as application by a sprayer or a brush, application by printing, and application in the form of a tape.

Subsequently, as shown in FIG. 8C, the cushioning sheet material 20S is supplied by feeding out the interior fabric 20W. The cushioning sheet material 20S supplied in this way is continuously obtained by cutting the interior fabric 20W along the cutting line A along the CD direction (direction intersecting the feeding direction). For example, when the feeding speed of the interior fabric 20W is "Z ₁ [m / s]" and the dimension in the MD direction (width direction) set in the cushioning sheet material 20S is "Z ₂ [m]". The interior original fabric 20W is cut by the cutting line A at every time interval "Z ₂ / Z _{1 [s]".}
The interior fabric 20W is fed out in the MD direction without being stretched in the CD direction. In other words, the interior original fabric 20W is maintained in an unstretched state at the time of feeding by feeding.

Then, both end edges (left and right buffer bonding areas 21S and 22S in FIG. 8) in the CD direction (direction intersecting a predetermined direction) of the supplied buffer sheet material 20S and the main body bonding areas 110S and 120S to which the adhesive is applied are applied. And are pasted together. In the present embodiment, the first buffer sticking area 21S and the first main body sticking area 110S are stuck together, and at the same time, the second buffer sticking area 22S and the second main body sticking area 110S are stuck together.

Then, as shown in FIG. 8D, the folded portion 16 is returned to a flat surface and the cushioning sheet material 20S is _{bent along the fourth horizontal ruled line R X4} , so that the main body sheet material 10S and the cushioning sheet material 20S are both two. Fold it in half. That is, by returning the second sheet piece 12S that was bent in a V shape at the folded portion 16 to a flat shape, the main body sheet material 10S is folded back from a Z shape to a V shape, and the cushioning sheet material 20S is combined with this. Bend in a V shape in conjunction.

As a result, as shown in FIG. 8E, the main body sheet material 10S is in a state of being folded in half at the bottom portion 13, and the first sheet piece 11S and the second sheet piece 12S are arranged so as to face each other. Further, inside the main body sheet material 10S folded in half in this way, the cushioning sheet material 20S folded in half is arranged. Therefore, the cushioning sheet material 20S is interposed between the first sheet piece 11S and the second sheet piece 12S facing each other. The main body sheet material 10S is thus bag-made at the same time as the cushioning sheet material 20S is installed.

Finally, as shown in FIG. 8 (F), the glue margin sheet piece 18S is folded and glued on the second sheet piece 12S in the same manner as in normal bag making.

In the above-mentioned manufacturing method, each step shown in FIG. 9 is sequentially carried out.
First, the first supply step of supplying the main body sheet material 10S is carried out (step A10). Next, the main body sheet material 10S supplied in the first supply process _{is bent at both the second horizontal ruled line R X2 corresponding to the bottom 13 and the third horizontal ruled line R X3} corresponding to the folded portion 16, and the main body sheet material is bent. A folding step (first folding step, second folding step) of folding the 10S into a Z shape is carried out (step A20). After that, an applying step (bonding step) of applying an adhesive to each of the main body attaching regions 110S and 120S of the main body sheet material 10S bent in the bending step is carried out (step A30).

In addition, a second supply step of supplying the cushioning sheet material 20S is carried out (step A40). In this second supply step, a feeding step of feeding out the interior raw fabric 20W in a state of forming a single layer that is not folded is carried out (step A42), and the interior raw fabric 20W fed out in the feeding step is cut by the cutting line A. The cutting step is carried out (step A44).
Next, an adhesive step of adhering (bonding) the main body attachment areas 110S and 120S to which the adhesive was applied in the application step and the buffer application areas 21S and 22S of the buffer sheet material 20S supplied in the second supply process (adhesion). The bonding step) is carried out (step A50). In this bonding step, the first main body sticking area 110S and the first buffer sticking area 21S are bonded, and at the same time, the second main body sticking area 120S and the second buffer sticking area 22S are bonded.

Then, the folded portion 16 of the main body sheet material 10S is returned to a flat surface, and the cushioning sheet material 20S is bent along the fourth horizontal ruled line R _X4 corresponding to the folded line portion 230 to form the first sheet piece 11S and the second of the main body sheet material 10S. A folding step is performed in which the cushioning sheet material 20S in a folded state is interposed between the sheet piece 12S and the sheet piece 12S (step A60).
After that, another bag-making step of folding and gluing the glue margin sheet piece 18S on the second sheet piece 12S is carried out in the same manner as in the normal bag-making step (step A70).

[5. Action and effect]
According to the method for manufacturing a packaging bag according to the present embodiment, the following actions and effects can be obtained.
(1) The interior fabric 20W cut by the cushioning sheet material 20S in the second supply step is supplied without being stretched in the CD direction. That is, in consideration of the fact that the cushioning portion 20 of the packaging bag is stretched by the user, the interior fabric 20W and the cushioning sheet material 20S corresponding to the cushioning portion 20 are not stretched at the time of manufacturing. By laminating the cushioning sheet material 20S held in an unstretched state and the main body sheet material 10S in this way, a packaging bag using a sheet-shaped cushioning material in which a cushioning allowance appears when stretched is manufactured. Can be done.

_{By the way, the dimension L 4} between the cushioning attachment areas 21S and 22S in the expanded state cushioning sheet material 20S is shorter than the dimension between the main body attaching areas 110S and 120S in the expanded main body sheet material 10S. Therefore, it is not possible to bond both the cushioning application areas 21S and 22S to the main body sheet material 10S in the expanded state without stretching the cushioning sheet material 20S.
On the other hand, in the above-mentioned manufacturing method, the second sheet piece 12S, which is the second surface portion 12 of the main body sheet material 10S, _{is bent along the third horizontal ruled line R X3} corresponding to the folded portion 16, and then the cushioning sheet material 20S is formed. Supply. That is, by bending the main body sheet material 10S at the folded portion 16, the dimension L ₃ between the main body sticking areas 110S and 120S is shorter than in the unfolded state, and then the cushioning sheet material 20S is supplied. Therefore, it is possible to easily bond the main body sticking areas 110S and 120S and the cushioning sticking areas 21S and 22S while keeping the cushioning sheet material 20S in an unstretched state. Therefore, since the bonding work between the main body sheet material 10S and the cushioning sheet material 20S becomes easy, it is possible to contribute to the improvement of the manufacturing efficiency of the packaging bag.

Further, after the main body sheet material 10S and the cushioning sheet material 20S are bonded together, the folded portion 16 of the main body sheet material 10S is returned to a flat surface, and the cushioning sheet material 20S is placed on the fourth horizontal ruled line R _{X4 corresponding to the folded line portion 230.} By bending, the cushioning sheet material 20S can be interposed between the two sheet pieces 11S and 12S. In other words, the process of bending the cushioning sheet material 20S and the process of arranging the cushioning sheet material 20S inside the main body sheet material 10S can be combined into one. From this point as well, it can contribute to the improvement of the manufacturing efficiency of the packaging bag.
Further, since the cushioning sheet material 20S is supplied in an unfolded state, attached to the main body sheet material 10S, and then bent at the folding line portion 230, a single-layer interior original fabric 20W can be used. Therefore, it is not necessary to prepare the interior fabric that has been folded into two layers in advance, and it is possible to suppress an increase in material cost.

(2) Further, in the above-mentioned manufacturing method, the bonding of the first main body attachment area 110S and the first buffer attachment area 21S and the attachment of the second main body attachment area 120S and the second buffer attachment area 22S are simultaneously performed. Therefore, the bonding work between the main body sheet material 10S and the cushioning sheet material 20S can be performed more efficiently. Therefore, it is possible to shorten the time required for the bonding work between the main body sheet material 10S and the cushioning sheet material 20S.

(3) folding section 16 described above, the body pasting area 110S of the body sheet material 10S folded in Z-shape, buffer attaching area 21S of the buffer sheet member 20S dimension L ₃ is expanded between 120S, between 22S The position in the Y direction is set so as to be equal to the dimension L _4. Therefore, when the main body sheet material 10S folded in a Z shape and the developed cushioning sheet material 20S are overlapped and arranged, the main body sticking areas 110S and 120S and the cushioning sticking areas 21S and 22S are exactly aligned. Can be done. This makes it easier to more appropriately bond the main body attachment areas 110S and 120S and the cushioning application areas 21S and 22S, which can contribute to the improvement of the quality of the packaging bag.

(4) In the main body sheet material 10S described above, the sheet pieces 11S and 12S which are the surface portions 11 and 12 facing each other in the main body bag 10 are connected to each other via the bottom portion 13. When such a single main body sheet material 10S is applied, the cushioning sheet material 20S can be easily bonded by bending the main body sheet material 10S at the folded portion 16 and the bottom portion 13 and folding it in a Z shape. can. Further, in this case, since the sheet pieces 11S and 12S are connected to each other via the bottom portion 13, the bottom portion 13 can be formed only by bending _{the main body sheet material 10S along the second horizontal ruled line R X2.} The alignment of the sheet pieces 11S and 12S becomes easy. Therefore, it can contribute to the improvement of productivity.

(5) In the above-mentioned manufacturing method, since the main body sheet material 10S and the cushioning sheet material 20S are bonded with an adhesive, various materials can be used for the interior fabric 20W. Further, by adopting the bonding with an adhesive (general bonding method), the addition of manufacturing equipment can be suppressed, which can contribute to the reduction of manufacturing cost.
(6) In the second supply step, since the sheet-fed cushioning sheet material 20S is obtained by cutting the unwound interior material 20W, the cushioning sheet material 20S can be continuously manufactured, and the packaging bag is manufactured. Efficiency can be improved.

[6. Modification example]
Hereinafter, modifications of the present embodiment will be described.

[6-1. One modification]
First, a method for manufacturing a packaging bag according to a modification will be described with reference to FIGS. 10 to 12.
The manufacturing method according to this modification is mainly different from the manufacturing method according to the above-described embodiment in the following points.
Difference 1: The main body sheet material consists of two sheet materials (two members) Difference 2: The main body sheet material with a laminated thermoplastic layer is used. Due to the difference 1, a packaging bag is manufactured in this modification. At that time, it is necessary to connect the two sheet materials that make up the main body sheet material.
On the other hand, due to the difference 2, in this modification, the laminated layer of the main body sheet material is melted or softened (hereinafter, simply referred to as “melting”) to be heated and pressed to obtain thermocompression bonding (adhesive action). Therefore, in this modification, the two sheet materials are connected to each other by using this thermocompression bonding, and the main body sheet material and the cushioning sheet material are bonded together. Therefore, it is possible to omit the steps of applying the adhesive and adhering with the applied adhesive as described above.

<Main body sheet material>
First, with reference to FIG. 10, the main body sheet material used in this modification will be described. In the following description, the same or corresponding elements as those described in the above-described embodiment will be designated by the same reference numerals, and duplicate description will be omitted.
As shown in FIG. 10A, the main body sheet material 10S'according to the present modification includes the first sheet material 10S ₁ constituting the first sheet piece 11S and the flap sheet piece 19S described above, and the second sheet described above. It is composed of two members with the second sheet material 10S _{2 constituting the piece 12S.} In other words, the body sheet 10S according to this modification ', as well as to cut the main sheet member 10S of the embodiments described above in the second horizontal lines R _X2, the two obtained by omitting the margin sheet piece 18S sheet It is composed of materials 10S ₁ and 10S _2.

The first sheet material 10S ₁ and the second sheet material 10S ₂ have a polyethylene resin layer laminated on the inner surface of the packaging bag. That is, both the first sheet material 10S ₁ and the second sheet material 10S ₂ are adhesive sheet materials that adhere to other members when the laminated layer is melted, heated and pressurized.
The end 130S on the Y ₂ direction side of the first sheet material 10S ₁ (corresponding to the lower end edge 130 of the first surface portion 11, see FIG. 1) and the end 140S on the Y _{1 direction side of the second sheet material 10S 2.} (Corresponding to the lower end edge portion 140 of the second surface portion 12, see FIG. 1) is a portion that is bonded to each other in the manufacturing process of the packaging bag to become the bottom portion 13 of the main body bag 10. Hereinafter, the end 130S on the Y ₂ direction side of the first sheet material 10S ₁ is also referred to as the first bonded end 130S, and the end 140S on the Y _{1 direction side of the second sheet material 10S 2} is referred to as the second bonded end. Also called 140S.

Further, the end portion 151S of the first X ₁ direction side of the sheet material 10S _1, and the second sheet material 10S ₂ of X ₁ direction side end portion 152S, body bags are bonded to each other in the manufacturing process of the packaging bag It is a portion that becomes one side portion 15 (see FIG. 1) of 10. Similarly, the end portion 141S of the first X ₂ direction side of the sheet material 10S _1, and the second sheet material 10S ₂ of X ₂ direction side end portion 142S, pasted together with one another during the manufacturing process of the packaging bag body It is a portion that becomes the other side portion 14 (see FIG. 1) of the bag 10. Hereinafter, these end portions 141S, 142S, 151S, 152S extending in the Y direction are collectively referred to as side region 141S, 142S, 151S, 152S.

The main body sheet material 10S'is assembled to the main body bag 10 by laminating the bonded end portions 130S and 140S and the side regions 141S, 142S, 151S and 152S, and is bent at _{the first horizontal ruled line R X1.} The opening 9 is closed by the bagging.
The cushioning sheet material 20S used in this modification is the same as that of the above-described embodiment. The cushioning sheet material 20S is not laminated with a thermoplastic layer.

In this modification, the _{position of the folded portion 16 in the second sheet material 10S 2} in the Y direction is set so as to satisfy both the following conditions 1 and 2.
Condition 1: When the second sheet material 10S ₂ is bent at the folded portion 16, the second main body bonding area 120S and the second bonding end portion 140S overlap each other.
Condition 2: When the sheet materials 10S ₁ and 10S ₂ are arranged so that the bonded end portions 130S and 140S overlap each other with the folded portion 16 located between the main body attaching areas 110S and 120S, the main body attaching area 110S, _{The distance D (dimensions) between the 120S is equal to the dimension L 4} [see FIG. 7 (C)] between the cushioning application areas 21S and 22S of the developed cushioning sheet material 20S.

_{Therefore, as shown in FIG. 10B, the sheet materials 10S 1} and 10S ₂ are arranged so that the bonded end portions 130S and 140S overlap each other while the folded portion 16 is positioned between the main body bonding areas 110S and 120S. Then, the distance D between the main body sticking areas 110S and 120S _{becomes equal to the dimension L 4} between the cushioning sticking areas 21S and 22S, and the first sticking end portion 130S, the second sticking end portion 140S and the second main body sticking area are equal to each other. The 120S are arranged so as to overlap in this order. In the main body sheet material 10S'with the two sheet materials 10S ₁ and 10S ₂ positioned in this way, the point where the first bonded end portion 130S and the second bonded end portion 140S are not connected and the glue are used. It is the same as the main body sheet material 10S folded in a Z shape according to the above-described embodiment, except that the substitute sheet piece 18S is omitted.

<Manufacturing method of packaging bag>
Hereinafter, a method for manufacturing a packaging bag according to this modification will be described step by step with reference to FIG. 11.
First, as shown in FIG. 11A, the first sheet material 10S ₁ and the second sheet material 10S ₂ are supplied, and the second sheet material 10S ₂ is bent along the third horizontal ruled line R _{X 3.} At this time, the folded portion 16 is formed. _{Next, the sheet materials 10S 1} and 10S ₂ are arranged so that the folded portion 16 is located between the main body pasting areas 110S and 120S. _{Here, the sheet materials 10S 1} and 10S ₂ are arranged so as to overlap the first bonded end portion 130S and the second bonded end portion 140S. As a result, in the main body sheet material 10S', the distance D between the main body attachment areas 110S and 120S _{becomes equal to the dimension L 4} between the cushioning attachment areas 21S and 22S, and the bonding end portions 130S and 140S and the second main body attachment area are equal to each other. The 120S are arranged so as to overlap each other.
Subsequently, as shown in FIG. 11B, the cushioning sheet material 20S is supplied by feeding out the interior fabric 20W. The interior fabric 20W supplied in this way is maintained in an unstretched state in the CD direction, as in the above-described embodiment.

After that, similarly to the above-described embodiment, the interior fabric 20W is cut along the cutting line A along the CD direction, and the cushioning sheet material 20S is continuously obtained.
The cushioning attachment areas 21S and 22S of the obtained cushioning sheet material 20S are placed on the main body attachment areas 110S and 120S of the supplied main body sheet material 10S'. As a result, the first main body sticking area 110S and the first buffer sticking area 21S are in a facing state, and the second main body sticking area 120S and the second buffering are arranged so as to overlap the bonding end portions 130S and 140S. It is in a state of facing the sticking area 22S. Therefore, the second main body bonding area 120S and the second bonding end 140S of _{the second sheet material 10S 2} are laminated between the second buffer bonding area 22S and the first bonding end 130S. Will be done.

Subsequently, as shown in FIG. 11C, these pasting areas 110S, 120S, 21S, 22S and the bonding end portions 130S, 140S are heat-pressure treated, and the main body bonding areas 110S, 120S and the bonding end portion are heat-treated. The laminated layers of 130S and 140S are melted. By this melting, the first main body sticking area 110S and the first buffer sticking area 21S are thermocompression-bonded, the second main body sticking area 120S and the second buffer sticking area 22S are thermocompression-bonded, and the first bonding end is further thermocompression-bonded. Both the portion 130S and the second bonded end portion 140S are thermocompression bonded. At this time, the bottom portion 13 is formed.

Note that the second inner sheet material 10S ₂ second sheet piece 121S and the outer second sheet piece 122S not thermocompression bonding together, be fixed in a state where the second sheet material 10S ₂ is folded by the folding unit 16 There is no. This is because the outer surface of the second sheet material 10S ₂ in the packaging bag is not laminated. That is, there is no member that thermocompression-bonds each other between the inner second sheet piece 121S and the outer second sheet piece 122S of _{the second sheet material 10S 2} bent at the folded portion 16.

After that, as shown in FIG. 11D, the folded portion 16 is returned to a flat surface and the cushioning sheet material 20S is bent _{along the fourth horizontal ruled line R X4.} As a result, as in the above-described embodiment, the first sheet piece 11S and the second sheet piece 12S are arranged so as to face each other, and the cushioning sheet folded in half between these sheet pieces 11S and 12S. Material 20S is arranged.
Then, as shown in FIG. 11 (E), the side regions 141S, 142S, 151S, 152S of the main body sheet material 10S'are thermocompression-bonded in the same manner as the above-mentioned bonded end portions 130S, 140S. As a result, as shown in FIG. 11 (F), two side portions 14, 15 are formed.

In the manufacturing method according to this modification, each step shown in FIG. 12 is sequentially carried out.
First, the first supply step of supplying the main body sheet material 10S'is carried out (step B10). In this first supply step, both the first sheet material 10S ₁ and the second sheet material 10S ₂ described above are supplied. _{Subsequently, the first bending step of bending the second sheet material 10S 2} supplied in the first supply step along the third horizontal ruled line R _X3 corresponding to the folded portion 16 is carried out (step B20). Then, the first sheet material 10S _{1 supplied in the first supply process and the second sheet material 10S 2} bent in the first bending process are placed so that the folded portion 16 is located between the main body attachment areas 110S and 120S. An arrangement step of arranging the layers on top of each other is carried out (step B30). In the arrangement process of this modification, the first sheet material 10S ₁ and the second sheet material 10S ₂ are positioned so that the bonded end portions 130S and 140S overlap each other.
In addition, a second supply step of supplying the cushioning sheet material 20S is carried out (step B40). In this second supply step, the feeding step and the cutting step are carried out in the same manner as in the above-described embodiment (steps B42 and B44).

Subsequently, the cushioning pasting areas 21S and 22S of the cushioning sheet material 20S supplied in the second supply step are placed on the main body pasting areas 110S and 120S of the _{sheet materials 10S 1} and 10S ₂ whose positions have been adjusted in the arranging process. A thermocompression bonding step (pasting) in which heat is applied to the pasting areas 110S, 120S, 21S, 22S and the bonding end portions 130S, 140S to melt the laminated layers of the main body bonding areas 110S, 120S and the bonding end portions 130S, 140S. (Matching process) is carried out (step B50).

After that, in the same manner as in the above-described embodiment, the folded portion 16 is returned to a flat surface and the cushioning sheet material 20S is _{bent along the fourth horizontal ruled line R X4} to form two between the first sheet piece 11S and the second sheet piece 12S. A folding step of interposing the cushioning sheet material 20S in a folded state is carried out (step B60). Then, the side regions 141S and 151S of the first sheet material 10S ₁ and the side regions 142S and 152S of the second sheet material 10S ₂ are bonded to each other to form the side portions 14 and 15 of the main body bag 10. The bag making process is carried out (step B70). In this bag making step, the side portions 14 and 15 are formed by melting the laminated layers of the side regions 141S, 142S, 151S and 152S in the same manner as in the thermocompression bonding step described above.

<Action and effect>
According to the method for manufacturing a packaging bag according to this modification, the following actions and effects can be obtained.
(1) The main body sheet material 10S'according to the present modification is composed of sheet materials 10S ₁ and 10S _{2 in} which the sheet pieces 11S and 12S forming the facing surface portions 11 and 12 in the main body bag 10 are different from each other. When applying such a two-sheet main body sheet material 10S', the first sheet material 10S _{1 and the second sheet material 10S 2} bent at the folded portion 16 are folded between the main body attachment areas 110S and 120S. By arranging the portions 16 so as to be positioned so as to be overlapped with each other, it is possible to facilitate the bonding between the main body sheet material 10S'and the cushioning sheet material 20S. Further, in this case, since the bottom portion 13 is formed by laminating the bonded end portions 130S and 140S to each other, the bending work at _{the second horizontal ruled line R X2 in the main body sheet material 10S as described above is performed.} It can be unnecessary.

(2) Further, in this modification, the laminated layer of the main body sheet material 10S'is melted in a state where the second main body sticking area 120S, the second cushioning sticking area 22S, and the bonding end portions 130S, 140S are overlapped. , The second main body attachment area 120S and the second buffer attachment area 22S are thermocompression-bonded, and the bonding end portions 130S and 140S are thermocompression-bonded to each other. Therefore, the work of sticking the second main body sticking area 120S and the second buffer sticking area 22S and the work of sticking the sticking end portions 130S and 140S to each other can be combined into one. Therefore, it can contribute to the reduction of manufacturing man-hours. In addition, the omission of the applying process and the bonding process also reduces the manufacturing man-hours and contributes to suppressing the increase in equipment cost.

(3) Further, according to the present modification, the same action and effect can be obtained from the same configuration as the above-described embodiment.

[6-2. others]
Hereinafter, other modification examples will be described.

<Packaging bag>
First, a modified example of the packaging bag will be described.
The notched portion and the non-notched portion are not limited to the orientation extending in the width direction, and may extend at least in the direction intersecting the suspension direction. With such an orientation, the shock absorber can be extended in the suspension direction. In this case, the orientation of the notch portion in the interior fabric is not parallel to the MD direction, but is oriented along the MD direction (crosses the CD direction).
The main body bag is not limited to the envelope type without a gusset provided with a flap, but various types of bags such as a square bottom bag, a gusset bag, a pillow bag, and a standing pouch can be used. You may use a bag without it. In this case, a body sheet material having a shape corresponding to various types of bags is used.

The material that can be used for the main body bag and the cushioning portion is not particularly limited as long as it is a sheet-like material having a strength that does not damage it during use. For example, the above-mentioned paper, paperboard, non-woven fabric, plastic sheet and the like can be used as the sheet material. Further, a laminated material (in addition to the above-mentioned laminated material, laminated paper, corrugated cardboard, etc.) can also be used as the sheet material. Among them, paper and paperboard are suitable for use as a sheet material because it is easy to recycle used paper. In particular, kraft paper, kurupack paper, and paperboard are preferable to be used as sheet materials because of their excellent strength. The sheet material may be provided with a coating layer on one side or both sides for the purpose of imparting water resistance, printability, and improving strength.

<Production method>
Next, a modified example of the manufacturing method of the packaging bag will be described.
The bonding between the first main body sticking area and the first buffer sticking area and the second main body sticking area and the second buffer sticking area and the sticking may not be performed at the same time. Similarly, the adhesive does not have to be applied to the first main body sticking area and the second main body sticking area at the same time. The adhesive application area may be a buffer application area in addition to or in place of the main body application area.

The cushioning sheet material may be provided with a plurality of folding lines. For example, if the cushioning sheet material is folded in a bellows shape at three or more folding lines, a packaging bag suspended in a state where the cushioning portion is folded into four or more is manufactured.
Further, the interior fabric to be fed may be provided with a plurality of notches in a staggered manner along the CD direction (predetermined direction). In this case, the interior fabric is cut along the CD direction and then bent along a folding curve along the CD direction. The cushioning sticking area of the cushioning sheet material thus obtained and the main body sticking area of the main body sheet material are bonded together. For example, a double-folded cushioning sheet material cut from an interior fabric and a main body sheet material oriented by rotating the above-mentioned main body sheet material by 90 ° in its extending plane are bonded together.

Instead of supplying the main body sheet material cut out in a sheet-fed shape in advance, a strip-shaped exterior material may be fed out, and the drawn out exterior material may be cut to supply the main body sheet material. In this case, the main body sheet material can be continuously manufactured, and the manufacturing efficiency of the packaging bag can be further improved. On the other hand, a cushioning sheet material cut out in a sheet-fed shape in advance may be supplied, and this cushioning sheet material may be attached to the main body sheet material. In this case, the step of feeding out the cushioning sheet material and the step of cutting can be omitted, and an increase in equipment cost can be suppressed.

In addition, in the method for manufacturing a packaging bag, a sealing adhesive portion such as glassine tape such as double-sided tape or Arabic glue may be added to the flap sheet piece. When a tape is used for the sealing adhesive portion, cutting this tape at the same time as the interior fabric can contribute to the improvement of manufacturing efficiency.

In one modification described above, a cushioning sheet material on which a thermoplastic layer is laminated may be used. In this case, a cushioning sheet material which is laminated on the surface facing the main body sheet material and which is not laminated is used on the opposite surface.
Further, of the two sheet materials constituting the main body sheet material, the laminating process of the first sheet material in which the folded portion is not provided may be omitted. In this case, an adhesive may be used for bonding the first main body bonding area and the first cushioning area, or by applying a laminated cushioning sheet material, the heat of the first buffering area can be heated. Thermocompression bonding obtained by melting the plastic layer may be used.
In addition, the above-mentioned thermocompression bonding and adhesion by an adhesive may be used in combination for the bonding of the bonding area, the bonding end portion, and the side portion region. In this case, the pasting area, the bonding end portion, and the side portion region can be more firmly bonded.

9 Opening 10 Main body bag (exterior body)
10S, 10S'Main body sheet material (exterior material)
10S ₁ First sheet material (sheet material, adhesive sheet material)
10S ₂ Second sheet material (sheet material, adhesive sheet material)
11 First surface (face)
12 Second surface (face)
13 Bottom 16 Folded part 20 Cushioning part (interior body)
20S cushioning sheet material (interior material)
20W interior fabric (interior material)
21S 1st buffer pasting area (interior edge area)
22S Second buffer pasting area (interior edge area)
23a, 23a'Notch 110,120 Upper end edge (one end edge)
110S 1st body sticking area (exterior edge area)
120S Second body pasting area (exterior edge area)
130, 140 Lower end edge (other end edge)

Claims (9)

A bag-shaped exterior body having two face portions facing each other, an opening formed at each one end edge portion in the vertical direction of the face portion, and a bottom portion formed at each other end end portion in the vertical direction of the face portion, and a bag-shaped exterior body. It is a method for manufacturing a packaging bag composed of an interior body having a plurality of notches extending along a predetermined direction in a staggered pattern and being incorporated in the exterior body.
One of the surface portions of the sheet-shaped exterior material to be the exterior body is bent at a folding portion along the lateral direction and overlapped with the other surface portion, and the folded portion is formed between the one end edges of the two surface portions. In the arranged state, the exterior end edge region set for each of the one end edges and the sheet-shaped interior material to be the interior body intersect in the predetermined direction without extending in the direction intersecting the predetermined direction. The bonding process of bonding the interior edge areas set at the edges of both ends in the direction of
After performing the bonding step, the folded portion is returned to a flat shape, the interior material is bent at a folded line portion along the predetermined direction, and the interior material is interposed between the two surface portions. A method of manufacturing a packaging bag, which is characterized in that. The bonding step is characterized in that one of the exterior edge regions and one of the interior edge regions are bonded together, and at the same time, the other exterior edge region and the other interior edge region are bonded together. The method for manufacturing a packaging bag according to claim 1. In the folded portion, the dimension between the exterior edge regions is the dimension between the interior edge regions after the one surface portion of the exterior material is bent at the folded portion and before the bonding step is performed. The method for manufacturing a packaging bag according to claim 1 or 2, wherein the vertical position is set so as to be equal to. In the exterior material, the other end edges of the two face portions are connected to each other via the bottom portion, and the bottom portion is bent in the opposite direction to the folded portion before the bonding step is performed. The method for manufacturing a packaging bag according to any one of claims 1 to 3. Before Kigai Paneling is constituted by a sheet material in which the two said surface portions are different from each other,
Prior to the execution of the bonding step, the one end edge portion of the sheet material constituting one of the face portions bent at the folded portion and the one end edge portion of the sheet material constituting the other surface portion were subjected to each other. The method for manufacturing a packaging bag according to any one of claims 1 to 3, further comprising an arrangement step of arranging the sheet materials on top of each other so that the folded portion is located between them. At least one of the sheet materials is an adhesive sheet material in which a thermoplastic layer is laminated on a region including at least the exterior edge region and the other end edge region of the face portion formed by the sheet material.
The folded portion is formed by bending the adhesive sheet material so that the exterior edge region of one of the surface portions made of the adhesive sheet material and the other end edge portion overlap with each other.
In the arrangement step, the sheet material is arranged so that the other end edges of the sheet material overlap each other.
The bonding step involves the exterior edge region of the adhesive sheet material bent at the folded portion, the other end edge portion, the other end edge portion of the other sheet material, and the interior edge region of one. 5. The fifth aspect of the invention is characterized by comprising a thermocompression bonding step of melting or softening the thermoplastic layer in the exterior edge region and the other end edge portion of the adhesive sheet material in a state where the adhesive sheets are stacked. How to make a packaging bag. The bonding step includes an application step of applying an adhesive to at least one of the interior edge region and the exterior edge region, and the interior edge region and the exterior edge with the adhesive applied in the application step. The method for manufacturing a packaging bag according to any one of claims 1 to 5 , further comprising an adhesive step of adhering to the edge region. A feeding process for feeding out a strip-shaped interior fabric used as the interior material, and
The packaging bag according to any one of claims 1 to 7, further comprising a cutting step of cutting the interior fabric unwound in the feeding step to obtain the sheet-shaped interior material. Production method. The method for manufacturing a packaging bag according to any one of claims 1 to 8, wherein the bag making step of making the exterior material is included after the folding back step is performed.

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