JP2019026298A - Manufacturing method of bag body with cushioning function and packaging method of article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bag body with a buffer function and a packaging method capable of realizing a more suitable storage state according to the type of stored items and further exhibiting a freshness-maintaining effect. SOLUTION: The bag body has a cushioning function, in which an outer bag 11 and an inner bag 15 are stacked in the thickness direction. A fluid such as gas or liquid is sealed in the buffer space 12 of the outer bag 11, and the stored object 10 is stored in the storage space 16 of the inner bag 15. By providing the inflow portion 34 of the fluid into the storage space 16, the fluid is enclosed not only in the buffer space 12 but also in the storage space 16. The size of the storage space 16 is regulated by the restriction seal 33 so that the size of the fluid can enter the buffer space 12. A check valve 41 is provided in the buffer space 12, and an opening serving as an inflow portion 34 is formed in the inner sheet 30 that defines the storage space 16. [Selection diagram] Fig. 1

Description

The present invention relates to a bag body with a buffer function and a packaging structure for articles.

Conventionally, a double bag having two spaces, a buffer bag and a storage bag, a storage space in which stored items are arranged in the storage bag, and a buffer space in which a fluid is enclosed inside the buffer bag. Various proposals have been made (see Patent Documents 1 to 4).
However, in any of the proposals, the fluid is not kept in the storage space in which the storage items are arranged, but the sealing is simply stopped so that the storage items do not jump out of the double bag. . As a result, the stored items may move to a position that the designer does not plan, or the stored items may collide with each other when a plurality of stored items are arranged in one storage space.

On the other hand, when things that are easily deformed, such as ikebana, are used as stored items, in the conventional bag body with a buffer function, the buffer space may be expanded by injection of the fluid, and the stored items may be compressed and deformed. was there.
Furthermore, this type of double bag mainly has a buffering effect, and when an article requiring maintenance of freshness is stored in a storage space as a stored item, the freshness of the bag is maintained. It was difficult to do.

JP 2014-144785 A JP 2006-69552 A JP 2003-40280 A JP 2003-26233 A

An object of the present invention is to provide a bag body with a buffering function capable of realizing a more suitable storage state depending on the type of stored items.
Another object of the present invention is not only to exhibit a buffering effect on the stored item, but also to a bag body with a buffering function capable of exhibiting a freshness maintaining effect, and a packaging structure of articles by the bag body. It is to offer.

The present invention includes a storage space in which two bags, a buffer bag and a storage bag, are disposed in the thickness direction, a storage space in which stored items are disposed in the storage bag, and a buffer space in which a fluid is enclosed inside the buffer bag. A bag body having a buffer function is provided that includes the following means.
In the present invention, it is provided with an inflow portion of the fluid with respect to the storage space, and the size of the storage space is regulated to be equal to or smaller than the size of the fluid entering the buffer space. Features. Thereby, it is possible to adopt a packaging structure in which the fluid is sealed not only in the buffer bag but also in the storage space.

The present invention can be implemented as including two outer sheets constituting the buffer bag and two inner sheets constituting the storage bag. The two outer sheets and the two inner sheets may have different forms, but by making them the same size, a form with high mass productivity can be obtained. The buffer space and the storage space are communicated by the inflow portion provided in the inner sheet, and a check that introduces a fluid from the outside into at least one of the buffer space and the storage space. It can be implemented as a valve. Thereby, the fluid can be sealed in both the buffer space and the storage space simply by introducing the fluid from the check valve.

In addition, the storage bag includes a central storage space and auxiliary spaces disposed on the left and right sides thereof, and the storage space and the auxiliary space are directly or indirectly connected to the buffer space, The fluid can be enclosed in the auxiliary space.
In addition, the storage space includes a loading / unloading port for loading and unloading the stored items, and the loading / unloading port includes a sealable chuck, whereby the stored items can be efficiently arranged and taken out. And volume reduction after use can also be performed efficiently.

Further, the present invention uses the above-mentioned bag body with a buffer function to store an article that needs to be kept fresh as the stored article in the storage space, and at least to store the fluid having a freshness maintaining effect on the article. It is intended to provide a packaging structure for an article, which is enclosed in a space and exhibits the freshness maintenance and buffering effect of the stored item at the same time.

According to the present invention, it is possible to provide a bag body with a buffer function that can realize a more suitable storage state according to the type of stored item.
The present invention has been able to provide a bag body with a buffer function capable of exhibiting not only a buffering effect on stored items but also a freshness maintaining effect.

The present invention has been able to provide a packaging structure for an article that exhibits a buffering effect on stored items and also exhibits a freshness maintaining effect.

The bag body with a buffer function which concerns on the 1st Embodiment of this invention is shown, (A) is a top view, (B) is structure explanatory drawing which concerns on the center longitudinal cross-section of (A), (C) is ( Structure explanatory drawing which concerns on the cross section along the restriction seal | sticker of A). The disassembled perspective view of the bag body with a buffer function which concerns on the 1st Embodiment. The storage form of the storage thing of the bag body with a buffer function which concerns on the same 1st Embodiment is shown, (A) is a cross-sectional view which shows an example of a storage form, (B) is another example of a storage form. FIG. The bag body with a buffer function which concerns on the 2nd Embodiment of this invention is shown, (A) is a top view, (B) is structure explanatory drawing which concerns on the center longitudinal cross-section of (A), (C) is ( Structure explanatory drawing which concerns on the cross section along the restriction seal | sticker of A).

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(First embodiment)
1 to 3 show a bag body with a buffering function according to a first embodiment of the present invention. In the bag body according to this embodiment, an outer bag 11 and an inner bag 15 are arranged in the thickness direction. ing. Specifically, in the thickness direction of the sheets constituting the outer bag 11 and the inner bag 15 (hereinafter sometimes referred to as the vertical direction), the buffer spaces 12 (first buffer) on the upper and lower sides of the inner bag 15 are provided. It is implemented as a double bag in which the space 13 and the second buffer space 14) are arranged.

The outer bag 11 is constituted by an outer sheet 20 (first outer sheet 21 and second outer sheet 22), and the inner bag 15 is constituted by an inner sheet 30 (first inner sheet 31 and second inner sheet 32), Both form a rectangular shape with the same outer shape.
The fluid introduced from the check valve 41 is sealed inside the outer sheet 20 (the first outer sheet 21 and the second outer sheet 22), thereby exhibiting a buffering effect on the stored item 10. The fluid may be a gas such as air or nitrogen, or a liquid such as water.

The inner bag 15 is partitioned by two restriction seals 33, whereby a storage space 16 is formed in the center, and auxiliary spaces 17 are formed on both the left and right sides thereof. The storage item 10 is stored in the storage space 16. In this bag body, the inflow portion 34 is formed in the inner sheet 30, whereby the fluid is introduced into the storage space 16, and the fluid is also introduced into the auxiliary space 17. It is configured.

These four sheets are sealed by the periphery being sealed by a peripheral seal 18. All of these sheets have the same size and shape (in this example, a rectangle), and are suitable for continuous production. Further, since the substantially entire circumference of the inner bag 15 is joined to the outer bag 11, the position of the inner bag 15 with respect to the outer bag 11 is stabilized.

In the following description, when there is no need to distinguish between the first outer sheet 21 and the second outer sheet 22 or when both sheets are collectively referred to as the outer sheet 20, the first inner sheet 31 and the second inner sheet When there is no need to distinguish between the sheets 32 or when both sheets are collectively referred to as the inner sheet 30. Similarly, the first buffer space 13 and the second buffer space 14 are referred to as the buffer space 12 when there is no need to distinguish or generically.

(Manufacture of bags)
In general, in the case of continuous production of sheet bags, it is common to produce a plurality of web-like sheets by heat-sealing or cutting the required parts while feeding them in the longitudinal direction. With the above configuration, the bag according to the embodiment can be manufactured using a general continuous production apparatus. Specifically, the two web-like inner sheets 30 (the first inner sheet 31 and the second inner sheet 32) are overlapped with each other, and the restriction seal 33 is formed. Next, the web-like outer sheets 20 (the first outer sheet 21 and the second outer sheet 22) are arranged above and below the two web-like inner sheets 30, and the check valve 41 is inserted so that they are elongated. Continuous production can be performed by performing a necessary process such as applying a peripheral seal 18 while intermittently or continuously feeding in the direction and cutting each bag.

(Packaging structure by bag)
In use of this bag body, the stored item 10 is disposed in the storage space 16 and is sealed by the peripheral seal 18. More specifically, the stored item 10 is inserted into the storage space 16 from the entrance of the surrounding seal 18 with the other 3 sides sealed while leaving the side that becomes the entrance (the upper side of FIG. 1A). After that, one side (the upper side in FIG. 1A) that becomes the opening is sealed.

Next, a fluid is introduced. In this bag, a check valve 41 is disposed in the second buffer space 14. An appropriate number of inflow portions 34 are provided in the inner sheet 30 at positions communicating with the second buffer space 14, the storage space 16, the auxiliary space 17, and the first buffer space 13. In this example, the inflow portion 34 is implemented as an opening provided in the inner sheet 30. With the above configuration, the fluid is introduced from the check valve 41, whereby the first buffer space 13, the second buffer space 14, the storage space 16, and the auxiliary space 17 are filled with the fluid and kept in an expanded state. It is.

At that time, when storing in the storage space 16 articles such as fruits and vegetables, fresh flowers, and fresh fish that are to be stored in the storage space 16, an inert gas such as nitrogen or liquid ice is stored as a fluid. By adopting the packaging structure of the article enclosed in the predetermined space including the space 16, it is possible to exhibit both the freshness maintenance and the buffering effect of the stored item 10 that needs the freshness maintenance.

(About the outer sheet 20)
Hereafter, each structure of a bag body is demonstrated in detail.
First, the outer sheet 20 is a sheet constituting the outside of the bag body, and constitutes the outer bag 11. In this embodiment, two sheets of the first outer sheet 21 and the second outer sheet 22 are used.

The material of the outer sheet 20 is desirably a flexible sheet having a sealing property against a fluid sealed inside. Specifically, it is a single-layer or multi-layer sheet composed of thermoplastic synthetic resin films such as polyethylene, polypropylene, and polyamide, and other materials such as metal foil, paper, and non-woven fabric as necessary. It is possible to use a composite material sheet with the above materials.

In this example, the outer sheet 20 has a rectangular shape, but the form can be changed as appropriate. In addition to a square, a polygon such as a triangle and a pentagon, a circle and an ellipse, and various other shapes can be used. Can be implemented.

(About inner sheet 30)
The inner sheet 30 is a sheet that is disposed so as to be overlapped between the outer sheets 20, and constitutes the inner bag 15.
In this example, the inner sheet 30 has the same shape and the same size as the outer sheet 20, but may have a shape different from that of the outer sheet 20 or smaller than the outer sheet 20. The form of the inner sheet 30 can be appropriately changed as in the outer sheet 20, and can be implemented in various shapes other than a square, a polygon such as a triangle and a pentagon, a circle and an ellipse. For example, the outer sheet 20 is rectangular, but the inner sheet 30 is not prevented from being implemented in a different shape such as a square.

In this embodiment, the material of the inner sheet 30 is a flexible sheet having a sealing property against the fluid sealed inside, as with the outer sheet 20. Unlike the sheet, it is sufficient if it is a sheet having flowability to the fluid. Specifically, it is also possible to use a synthetic resin sheet, nonwoven fabric, woven fabric, knitted fabric, mesh fabric, paper, or the like that is inferior in airtightness or liquid tightness in addition to a single sheet or a composite material sheet similar to the outer sheet 20. it can.

(About restriction seal 33)
The first inner sheet 31 and the second inner sheet 32 are joined together by a restriction seal 33 such as a heat seal, so that the storage space 16 and the auxiliary space 17 are partitioned.
Therefore, even if the inner sheet 30 and the outer sheet 20 have the same shape and the same size, the size of the storage space 16 in which the stored items 10 are stored is restricted to be smaller than the size of the outer bag 11. As a result, even when the storage object 10 and the fluid are introduced into the storage space 16 and the auxiliary space 17 to exhibit a three-dimensional shape, the size (volume) of the buffer space 12 of the outer bag 11 into which the fluid has been introduced. The second buffer space 14 between the outer bag 11 and the inner bag 15 is in a state in which a buffer fluid is present therein.

In addition, when the storage space 16 is sufficiently large with respect to the storage object 10, the storage object 10 is maintained in a freely moving state in the storage space 16 into which the fluid is introduced. On the other hand, when the storage space 16 is slightly larger than the storage object 10, the storage object 10 is restrained by the inner sheet 30 in the process of introducing the fluid and changing the storage space 16 into a three-dimensional shape. In the storage space 16, the stored item 10 is in a state in which it is difficult to move freely. Specifically, the horizontal width of the storage space 16 before the fluid is introduced is the longest, and the horizontal width of the storage space 16 becomes shorter as the cross-section approaches a circle as the fluid is introduced. As a result, even before the fluid is introduced, the storage 10 can move left and right in the storage space 16, but as a result of the introduction of the fluid, the storage 10 has a reduced lateral width. Inside, it will be tightened from the left and right by the inner sheet 30, and it will be difficult to move from side to side.

Next, the fluid may or may not be introduced into the auxiliary space 17. In the case where the fluid is introduced, the lateral width of the auxiliary space 17 is reduced, and as a result, a force for supporting the storage space 16 so as to be pulled from the left and right acts. On the other hand, when no fluid is introduced, the storage space 16 is supported in a relatively free state as a result of maintaining the width of the auxiliary space 17 as the width of the sheet.
Further, without providing the auxiliary space 17, the size of the inner sheet 30 can be made smaller than the size of the outer sheet 20, and in this case, the seal that defines the entire inner sheet 30 is limited. It functions as the seal 33.

As shown in FIG. 3, in this embodiment, two restriction seals 33 are provided on the left and right, and the storage space 16 is formed in the center and the auxiliary space 17 is formed on the left and right. The number of the limiting seals 33 may be one or three or more. When three or more are provided, one or two or more storage spaces 16 may be formed, or one or more auxiliary spaces 17 may be formed. Moreover, you may implement all the divided spaces as the storage space 16 in which the stored item 10 is stored.

The restriction seal 33 may be a curved line in addition to a straight line, or may be a structure that allows the fluid to move between the storage space 16 and the auxiliary space 17 by being provided intermittently.
Further, as shown in FIG. 1, in this embodiment, the limiting seal 33 is formed over the entire length of the inner sheet 30 in the front-rear direction, and the peripheral seal 18 is the bottom of the storage space 16. The bottom of the storage space 16 may be formed by the restriction seal 33 by connecting the left and right restriction seals 33 without reaching the full length.
In continuous production, after forming the limiting seal 33 on the sheet web of the first inner sheet 31 and the second inner sheet 32, the outer sheet 20 is supplied from the upper and lower sides of the limiting seal 33 so that the efficiency of the limiting seal 33 is increased. Can be formed.

(About check valve 41)
This bag body is provided with a check valve 41 as an introduction part for introducing a fluid from the outside into the bag body. The introduction portion may be a simple opening or a passage with a lid. However, since the check valve 41 is provided, the fluid is not allowed to flow out by the valve action. The introduction from the stop valve 41 is advantageous in that the internal sealed state can be maintained without performing heat sealing or closing the lid. As this check valve 41, it is advantageous to use a check valve made of a sheet such as Japanese Patent No. 4445879 according to the proposal of the present applicant, but other check valves such as a resin molded product should be adopted. Not disturb.

The check valve 41 is attached at the position and structure where the check valve 41 is sandwiched between the sheets, but it is assumed that the check valve 41 is attached to the plane of the sheet as in Japanese Patent No. 4932950 according to the applicant's proposal. It doesn't matter.
The check valve 41 is at least one of the buffer space 12, the storage space 16, and the auxiliary space 17 (in the illustrated example, the second buffer space 14 between the second inner seat 32 and the second outer seat 22). Can be provided between the first outer sheet 21 and the first inner sheet 31, or between the first inner sheet 31 and the second inner sheet 32, and at a plurality of locations. A check valve 41 can also be provided. At that time, a structure in which a fluid can be introduced from one flow path to a plurality of check valves, such as Japanese Patent No. 2626879 according to the proposal of the applicant of the present application, can also be adopted.

(About inflow part 34)
In this embodiment, a seat check valve 41 is provided only for the second buffer space 14. An inflow portion 34 for guiding the fluid introduced into the second buffer space 14 to other spaces (the first buffer space 13, the storage space 16, and the auxiliary space 17) includes the first inner sheet 31 and the second inner sheet. 32 are provided. The inflow part 34 can be implemented as an opening provided in each sheet. However, when a sheet having fluidity such as air permeability is adopted as the inner sheet 30, the fluid of the sheet itself is included. The distribution part becomes the inflow part.

About embodiment of illustration, since the thing which does not have fluidity of a fluid, or a thing with low fluidity is adopted, the opening provided in inner sheet 30 is adopted as inflow part 34. The opening (inflow portion 34) is provided at a plurality of locations. The size, number, and position can be changed as appropriate. For example, the size of the inflow portion 34 can be increased, the position close to the outlet of the check valve 41, or the inner seat 30. When the portion corresponding to the position of the check valve 41 is cut out, the fluid introduced from the check valve 41 is introduced into all the spaces almost simultaneously. The space does not swell larger than the above space, and all the spaces swell to the same extent (see FIG. 3A). On the other hand, when the inflow portion 34 is small and is formed at a position far from the check valve 41, the fluid introduced from the check valve 41 fills the second buffer space 14 and is sequentially introduced into another space. As a result, the second buffer space 14 swells relatively larger than the other spaces (see FIG. 3B). Of course, the internal pressures of all the spaces eventually become equal, but the swelled form at the beginning of the introduction of the fluid is maintained. Thus, since the form after inflating can be changed and adjusted depending on the form of the inflow portion 34, various designs are performed on the form after inflating depending on the purpose of use of the bag body and the type of the stored item 10. be able to.

(About fluid)
As the fluid to be introduced, air that can be used most easily and cheaply for the purpose of only the buffer effect may be used. However, when the stored item 10 is fresh food such as fruits and vegetables or fresh flowers. By using an inert gas such as nitrogen as the stored item 10, the function of maintaining its freshness can be added. In the present invention, the fluid means a substance having fluidity as an aggregate, for example, an aggregate of fine ice (solid) particles such as liquid ice, and has a fluid state as a whole. This includes what is maintained. By using this liquid ice as the stored item 10, it is possible to add a function of maintaining freshness such as fresh food. Further, when a swimming fish such as a tropical fish or a goldfish is used as the stored item 10, water may be introduced as a fluid.

In addition, when a separate introduction part is provided for the buffer space 12 and the storage space 16 and an inflow part 34 between them is not provided, separate fluids are introduced into the buffer space 12 and the storage space 16. Can do. Specifically, an example in which air is sealed in the buffer space 12 and an inert gas or liquid ice is sealed in the storage space 16 can be shown.

(Second Embodiment)
Next, with reference to FIG. 4, a bag according to a second embodiment will be described.
This bag body is different from the previous example in that the bag body is provided with a loading / unloading port for loading / unloading the stored item 10 in / from the storage space 16, and a seal 51 is provided at the loading / unloading port. Description of similar parts is omitted.

Specifically, out of the peripheral seal 18, one side (upper side in FIG. 1A) serving as the entrance of the bag body according to the first embodiment is used as an entrance and exit, and the chuck 51 is inserted into the entrance and exit. The male chuck tape 52 and the female chuck tape 53 are respectively attached to the inner side of the first inner sheet 31 and the second inner sheet 32 on one side as the entrance and exit. On the other three sides, four outer sheets 20 and inner sheets 30 are sealed with a peripheral seal 18.

The chuck 51 can be selected and used in various ways as a chuck for opening and closing the bag body, and its mounting structure may be in accordance with a regular method. In this example, the male chuck tape 52 and the female chuck tape 53 are used. At least one of the chucks 51 is fixed by the fixing seal 54 on one side (the upper side in FIG. 4C) closer to the outside of the bag in the width direction, and the other side (FIG. 4 ( In C), the lower side) is not fixed. As a result, the fluid enters between the second inner sheet 32 and the female chuck tape 53 as shown by an arrow in FIG. 4B, so that the male chuck tape 52 and the female chuck tape 53 are fitted. There is an advantage that the pressure by the fluid can be applied in a direction that does not come off and the sealing property can be improved.

(Example of change)
The present invention can be implemented with various modifications. In the illustrated embodiment, the check valve 41 is provided in the buffer space 12 and the inflow portion 34 is provided in the inner seat 30. A check valve 41 may be provided in the space 17, and an inflow portion 34 may be provided in the inner seat 30. In this case, the check valve 41 provided in the storage space 16 should be understood as an inflow portion with respect to the storage space 16. Further, a check valve 41 may be provided in each of the buffer space 12 and the storage space 16, and in this case, the check valve 41 provided in the storage space 16 is understood as an inflow portion.

Furthermore, in the illustrated embodiment, the two buffer spaces 12 of the first buffer space 13 and the second buffer space 14 are provided on the upper and lower sides of the storage space 16, but the first buffer space 13 and the second buffer space 14 are provided. It is also possible to implement a structure in which only one of them is provided and the other is not provided. In this case, the storage space 16 is not disposed inside the outer bag 11, but a buffering effect can be exhibited by arranging the outer bag 11 on one surface of the storage space 16. For example, when a plurality of bags are stacked and stored in a box, the buffer space 12 can be arranged substantially above and below the storage space 16.

DESCRIPTION OF SYMBOLS 10 Storage thing 11 Outer bag 12 Buffer space 13 First buffer space 14 Second buffer space 15 Inner bag 16 Storage space 17 Auxiliary space 18 Perimeter seal 20 Outer sheet 21 First outer sheet 22 Second outer sheet 30 Inner sheet 31 First Inner sheet 32 Second inner sheet 33 Restriction seal 34 Inflow portion 41 Check valve 51 Chuck 52 Male chuck tape 53 Female chuck tape 54 Fixed seal

The present invention relates to a method of manufacturing a bag body with a buffer function and a method of packaging an article .

Conventionally, a double bag having two spaces, a buffer bag and a storage bag, a storage space in which stored items are arranged in the storage bag, and a buffer space in which a fluid is enclosed inside the buffer bag. Various proposals have been made (see Patent Documents 1 to 4).
However, in any of the proposals, the fluid is not kept in the storage space in which the storage items are arranged, but the sealing is simply stopped so that the storage items do not jump out of the double bag. . As a result, the stored items may move to a position that the designer does not plan, or the stored items may collide with each other when a plurality of stored items are arranged in one storage space.

On the other hand, when things that are easily deformed, such as ikebana, are used as stored items, in the conventional bag body with a buffer function, the buffer space may be expanded by injection of the fluid, and the stored items may be compressed and deformed. was there.
Furthermore, this type of double bag mainly has a buffering effect, and when an article requiring maintenance of freshness is stored in a storage space as a stored item, the freshness of the bag is maintained. It was difficult to do.

JP 2014-144785 A JP 2006-69552 A JP 2003-40280 A JP 2003-26233 A

The objective of this invention is providing the manufacturing method of the bag body with a buffer function which can implement | achieve the more suitable accommodation state according to the kind of accommodation thing.
Another object of the present invention is to provide an article wrapping method that not only exhibits a buffering effect on stored items but also can exhibit a freshness maintaining effect.

The present invention includes a storage space in which two bags, a buffer bag and a storage bag, are disposed in the thickness direction, a storage space in which stored items are disposed in the storage bag, and a buffer space in which a fluid is enclosed inside the buffer bag. A bag body having a buffer function is provided that includes the following means.
In the present invention, it is provided with an inflow portion of the fluid with respect to the storage space, and the size of the storage space is regulated to be equal to or smaller than the size of the fluid entering the buffer space. Features. Thereby, it is possible to adopt a packaging structure in which the fluid is sealed not only in the buffer bag but also in the storage space.

The present invention can be implemented as including two outer sheets constituting the buffer bag and two inner sheets constituting the storage bag. The two outer sheets and the two inner sheets may have different forms, but by making them the same size, a form with high mass productivity can be obtained. The buffer space and the storage space are communicated by the inflow portion provided in the inner sheet, and a check that introduces a fluid from the outside into at least one of the buffer space and the storage space. It can be implemented as a valve. Thereby, the fluid can be sealed in both the buffer space and the storage space simply by introducing the fluid from the check valve.

In addition, the storage bag includes a central storage space and auxiliary spaces disposed on the left and right sides thereof, and the storage space and the auxiliary space are directly or indirectly connected to the buffer space, The fluid can be enclosed in the auxiliary space.
In addition, the storage space includes a loading / unloading port for loading and unloading the stored items, and the loading / unloading port includes a sealable chuck, whereby the stored items can be efficiently arranged and taken out. And volume reduction after use can also be performed efficiently.

Thus, in the present application, the interior of the buffer space is provided with a storage space in which stored items are disposed, and two buffer spaces, a first buffer space and a second buffer space, which are disposed on both upper and lower sides of the storage space. In the method of manufacturing a bag body configured to cushion a stored item in the storage space by enclosing a fluid in the storage space, two outer sheets forming the buffer space, and the storage space Two inner sheets to be formed are used, and the two outer sheets and the two inner sheets have the same size, and one outer sheet is placed above and below the two inner sheets. The first buffer space and the second buffer space are provided one by one, and the inner sheet is sealed with a restricting seal between the two inner sheets, so that the size of the storage space is reduced in the buffer space. Is restricted to the size of An introduction part for introducing the fluid from the outside is provided only in one of the first buffer space and the second buffer space, and an inflow part is provided in the two inner sheets, and the inflow part By adjusting at least one of the size of the inflow portion and the position of the inflow portion from the introduction portion, the fluid introduced from the introduction portion becomes the storage space, the first buffer space, and the second The expanded form is introduced into all the buffer spaces almost simultaneously and swells to the same extent, or the fluid introduced from the introduction part is sequentially introduced into another space after filling the one buffer space. Thus, the present invention provides an invention relating to a method of manufacturing a bag body with a buffering function, which is manufactured by adjusting whether one of the buffer spaces is in a form after expansion that is relatively larger than the other space.

Furthermore, the present invention provides a bag body manufactured by the above-described method for manufacturing a bag body with a buffer function, and stores an article that needs to maintain freshness in the storage space as the stored item, and has the effect of maintaining the freshness on the article. An article wrapping method is provided in which both the freshness maintenance and the buffering effect of the stored items are exhibited by introducing the fluid having the fluid from the introduction part.

The present invention has been able to provide a method of manufacturing a bag body with a buffering function that can realize a more suitable storage state according to the type of stored item.
The present invention has been able to provide a method for packaging an article that exhibits a buffering effect on stored items and also exhibits a freshness maintaining effect.

The bag body with a buffer function which concerns on the 1st Embodiment of this invention is shown, (A) is a top view, (B) is structure explanatory drawing which concerns on the center longitudinal cross-section of (A), (C) is ( Structure explanatory drawing which concerns on the cross section along the restriction seal | sticker of A). The disassembled perspective view of the bag body with a buffer function which concerns on the 1st Embodiment. The storage form of the storage thing of the bag body with a buffer function which concerns on the same 1st Embodiment is shown, (A) is a cross-sectional view which shows an example of a storage form, (B) is another example of a storage form. FIG. The bag body with a buffer function which concerns on the 2nd Embodiment of this invention is shown, (A) is a top view, (B) is structure explanatory drawing which concerns on the center longitudinal cross-section of (A), (C) is ( Structure explanatory drawing which concerns on the cross section along the restriction seal | sticker of A).

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(First embodiment)
1 to 3 show a bag body with a buffering function according to a first embodiment of the present invention. In the bag body according to this embodiment, an outer bag 11 and an inner bag 15 are arranged in the thickness direction. ing. Specifically, in the thickness direction of the sheets constituting the outer bag 11 and the inner bag 15 (hereinafter sometimes referred to as the vertical direction), the buffer spaces 12 (first buffer) on the upper and lower sides of the inner bag 15 are provided. It is implemented as a double bag in which the space 13 and the second buffer space 14) are arranged.

The outer bag 11 is constituted by an outer sheet 20 (first outer sheet 21 and second outer sheet 22), and the inner bag 15 is constituted by an inner sheet 30 (first inner sheet 31 and second inner sheet 32), Both form a rectangular shape with the same outer shape.
The fluid introduced from the check valve 41 is sealed inside the outer sheet 20 (the first outer sheet 21 and the second outer sheet 22), thereby exhibiting a buffering effect on the stored item 10. The fluid may be a gas such as air or nitrogen, or a liquid such as water.

The inner bag 15 is partitioned by two restriction seals 33, whereby a storage space 16 is formed in the center, and auxiliary spaces 17 are formed on both the left and right sides thereof. The storage item 10 is stored in the storage space 16. In this bag body, the inflow portion 34 is formed in the inner sheet 30, whereby the fluid is introduced into the storage space 16, and the fluid is also introduced into the auxiliary space 17. It is configured.

These four sheets are sealed by the periphery being sealed by a peripheral seal 18. All of these sheets have the same size and shape (in this example, a rectangle), and are suitable for continuous production. Further, since the substantially entire circumference of the inner bag 15 is joined to the outer bag 11, the position of the inner bag 15 with respect to the outer bag 11 is stabilized.

In the following description, when there is no need to distinguish between the first outer sheet 21 and the second outer sheet 22 or when both sheets are collectively referred to as the outer sheet 20, the first inner sheet 31 and the second inner sheet When there is no need to distinguish between the sheets 32 or when both sheets are collectively referred to as the inner sheet 30. Similarly, the first buffer space 13 and the second buffer space 14 are referred to as the buffer space 12 when there is no need to distinguish or generically.

(Manufacture of bags)
In general, in the case of continuous production of sheet bags, it is common to produce a plurality of web-like sheets by heat-sealing or cutting the required parts while feeding them in the longitudinal direction. With the above configuration, the bag according to the embodiment can be manufactured using a general continuous production apparatus. Specifically, the two web-like inner sheets 30 (the first inner sheet 31 and the second inner sheet 32) are overlapped with each other, and the restriction seal 33 is formed. Next, the web-like outer sheets 20 (the first outer sheet 21 and the second outer sheet 22) are arranged above and below the two web-like inner sheets 30, and the check valve 41 is inserted so that they are elongated. Continuous production can be performed by performing a necessary process such as applying a peripheral seal 18 while intermittently or continuously feeding in the direction and cutting each bag.

(Packaging structure by bag)
In use of this bag body, the stored item 10 is disposed in the storage space 16 and is sealed by the peripheral seal 18. More specifically, the stored item 10 is inserted into the storage space 16 from the entrance of the surrounding seal 18 with the other 3 sides sealed while leaving the side that becomes the entrance (the upper side of FIG. 1A). After that, one side (the upper side in FIG. 1A) that becomes the opening is sealed.

Next, a fluid is introduced. In this bag, a check valve 41 is disposed in the second buffer space 14. An appropriate number of inflow portions 34 are provided in the inner sheet 30 at positions communicating with the second buffer space 14, the storage space 16, the auxiliary space 17, and the first buffer space 13. In this example, the inflow portion 34 is implemented as an opening provided in the inner sheet 30. With the above configuration, the fluid is introduced from the check valve 41, whereby the first buffer space 13, the second buffer space 14, the storage space 16, and the auxiliary space 17 are filled with the fluid and kept in an expanded state. It is.

At that time, when storing in the storage space 16 articles such as fruits and vegetables, fresh flowers, and fresh fish that are to be stored in the storage space 16, an inert gas such as nitrogen or liquid ice is stored as a fluid. By adopting the packaging structure of the article enclosed in the predetermined space including the space 16, it is possible to exhibit both the freshness maintenance and the buffering effect of the stored item 10 that needs the freshness maintenance.

(About the outer sheet 20)
Hereafter, each structure of a bag body is demonstrated in detail.
First, the outer sheet 20 is a sheet constituting the outside of the bag body, and constitutes the outer bag 11. In this embodiment, two sheets of the first outer sheet 21 and the second outer sheet 22 are used.

The material of the outer sheet 20 is desirably a flexible sheet having a sealing property against a fluid sealed inside. Specifically, it is a single-layer or multi-layer sheet composed of thermoplastic synthetic resin films such as polyethylene, polypropylene, and polyamide, and other materials such as metal foil, paper, and non-woven fabric as necessary. It is possible to use a composite material sheet with the above materials.

In this example, the outer sheet 20 has a rectangular shape, but the form can be changed as appropriate. In addition to a square, a polygon such as a triangle and a pentagon, a circle and an ellipse, and various other shapes can be used. Can be implemented.

(About inner sheet 30)
The inner sheet 30 is a sheet that is disposed so as to be overlapped between the outer sheets 20, and constitutes the inner bag 15.
In this example, the inner sheet 30 has the same shape and the same size as the outer sheet 20, but may have a shape different from that of the outer sheet 20 or smaller than the outer sheet 20. The form of the inner sheet 30 can be appropriately changed as in the outer sheet 20, and can be implemented in various shapes other than a square, a polygon such as a triangle and a pentagon, a circle and an ellipse. For example, the outer sheet 20 is rectangular, but the inner sheet 30 is not prevented from being implemented in a different shape such as a square.

In this embodiment, the material of the inner sheet 30 is a flexible sheet having a sealing property against the fluid sealed inside, as with the outer sheet 20. Unlike the sheet, it is sufficient if it is a sheet having flowability to the fluid. Specifically, it is also possible to use a synthetic resin sheet, nonwoven fabric, woven fabric, knitted fabric, mesh fabric, paper, or the like that is inferior in airtightness or liquid tightness in addition to a single sheet or a composite material sheet similar to the outer sheet 20. it can.

(About restriction seal 33)
The first inner sheet 31 and the second inner sheet 32 are joined together by a restriction seal 33 such as a heat seal, so that the storage space 16 and the auxiliary space 17 are partitioned.
Therefore, even if the inner sheet 30 and the outer sheet 20 have the same shape and the same size, the size of the storage space 16 in which the stored items 10 are stored is restricted to be smaller than the size of the outer bag 11. As a result, even when the storage object 10 and the fluid are introduced into the storage space 16 and the auxiliary space 17 to exhibit a three-dimensional shape, the size (volume) of the buffer space 12 of the outer bag 11 into which the fluid has been introduced. The second buffer space 14 between the outer bag 11 and the inner bag 15 is in a state in which a buffer fluid is present therein.

In addition, when the storage space 16 is sufficiently large with respect to the storage object 10, the storage object 10 is maintained in a freely moving state in the storage space 16 into which the fluid is introduced. On the other hand, when the storage space 16 is slightly larger than the storage object 10, the storage object 10 is restrained by the inner sheet 30 in the process of introducing the fluid and changing the storage space 16 into a three-dimensional shape. In the storage space 16, the stored item 10 is in a state in which it is difficult to move freely. Specifically, the horizontal width of the storage space 16 before the fluid is introduced is the longest, and the horizontal width of the storage space 16 becomes shorter as the cross-section approaches a circle as the fluid is introduced. As a result, even before the fluid is introduced, the storage 10 can move left and right in the storage space 16, but as a result of the introduction of the fluid, the storage 10 has a reduced lateral width. Inside, it will be tightened from the left and right by the inner sheet 30, and it will be difficult to move from side to side.

Next, the fluid may or may not be introduced into the auxiliary space 17. In the case where the fluid is introduced, the lateral width of the auxiliary space 17 is reduced, and as a result, a force for supporting the storage space 16 so as to be pulled from the left and right acts. On the other hand, when no fluid is introduced, the storage space 16 is supported in a relatively free state as a result of maintaining the width of the auxiliary space 17 as the width of the sheet.
Further, without providing the auxiliary space 17, the size of the inner sheet 30 can be made smaller than the size of the outer sheet 20, and in this case, the seal that defines the entire inner sheet 30 is limited. It functions as the seal 33.

As shown in FIG. 3, in this embodiment, two restriction seals 33 are provided on the left and right, and the storage space 16 is formed in the center and the auxiliary space 17 is formed on the left and right. The number of the limiting seals 33 may be one or three or more. When three or more are provided, one or two or more storage spaces 16 may be formed, or one or more auxiliary spaces 17 may be formed. Moreover, you may implement all the divided spaces as the storage space 16 in which the stored item 10 is stored.

The restriction seal 33 may be a curved line in addition to a straight line, or may be a structure that allows the fluid to move between the storage space 16 and the auxiliary space 17 by being provided intermittently.
Further, as shown in FIG. 1, in this embodiment, the limiting seal 33 is formed over the entire length of the inner sheet 30 in the front-rear direction, and the peripheral seal 18 is the bottom of the storage space 16. The bottom of the storage space 16 may be formed by the restriction seal 33 by connecting the left and right restriction seals 33 without reaching the full length.
In continuous production, after forming the limiting seal 33 on the sheet web of the first inner sheet 31 and the second inner sheet 32, the outer sheet 20 is supplied from the upper and lower sides of the limiting seal 33 so that the efficiency of the limiting seal 33 is increased. Can be formed.

(About check valve 41)
This bag body is provided with a check valve 41 as an introduction part for introducing a fluid from the outside into the bag body. The introduction portion may be a simple opening or a passage with a lid. However, since the check valve 41 is provided, the fluid is not allowed to flow out by the valve action. The introduction from the stop valve 41 is advantageous in that the internal sealed state can be maintained without performing heat sealing or closing the lid. As this check valve 41, it is advantageous to use a check valve made of a sheet such as Japanese Patent No. 4445879 according to the proposal of the present applicant, but other check valves such as a resin molded product should be adopted. Not disturb.

The check valve 41 is attached at the position and structure where the check valve 41 is sandwiched between the sheets, but it is assumed that the check valve 41 is attached to the plane of the sheet as in Japanese Patent No. 4932950 according to the applicant's proposal. It doesn't matter.
The check valve 41 is at least one of the buffer space 12, the storage space 16, and the auxiliary space 17 (in the illustrated example, the second buffer space 14 between the second inner seat 32 and the second outer seat 22). Can be provided between the first outer sheet 21 and the first inner sheet 31, or between the first inner sheet 31 and the second inner sheet 32, and at a plurality of locations. A check valve 41 can also be provided. At that time, a structure in which a fluid can be introduced from one flow path to a plurality of check valves, such as Japanese Patent No. 2626879 according to the proposal of the applicant of the present application, can also be adopted.

(About inflow part 34)
In this embodiment, a seat check valve 41 is provided only for the second buffer space 14. An inflow portion 34 for guiding the fluid introduced into the second buffer space 14 to other spaces (the first buffer space 13, the storage space 16, and the auxiliary space 17) includes the first inner sheet 31 and the second inner sheet. 32 are provided. The inflow part 34 can be implemented as an opening provided in each sheet. However, when a sheet having fluidity such as air permeability is adopted as the inner sheet 30, the fluid of the sheet itself is included. The distribution part becomes the inflow part.

About embodiment of illustration, since the thing which does not have fluidity of a fluid, or a thing with low fluidity is adopted, the opening provided in inner sheet 30 is adopted as inflow part 34. The opening (inflow portion 34) is provided at a plurality of locations. The size, number, and position can be changed as appropriate. For example, the size of the inflow portion 34 can be increased, the position close to the outlet of the check valve 41, or the inner seat 30. When the portion corresponding to the position of the check valve 41 is cut out, the fluid introduced from the check valve 41 is introduced into all the spaces almost simultaneously. The space does not swell larger than the above space, and all the spaces swell to the same extent (see FIG. 3A). On the other hand, when the inflow portion 34 is small and is formed at a position far from the check valve 41, the fluid introduced from the check valve 41 fills the second buffer space 14 and is sequentially introduced into another space. As a result, the second buffer space 14 swells relatively larger than the other spaces (see FIG. 3B). Of course, the internal pressures of all the spaces eventually become equal, but the swelled form at the beginning of the introduction of the fluid is maintained. Thus, since the form after inflating can be changed and adjusted depending on the form of the inflow portion 34, various designs are performed on the form after inflating depending on the purpose of use of the bag body and the type of the stored item 10. be able to.

(About fluid)
As the fluid to be introduced, air that can be used most easily and cheaply for the purpose of only the buffer effect may be used. However, when the stored item 10 is fresh food such as fruits and vegetables or fresh flowers. By using an inert gas such as nitrogen as the stored item 10, the function of maintaining its freshness can be added. In the present invention, the fluid means a substance having fluidity as an aggregate, for example, an aggregate of fine ice (solid) particles such as liquid ice, and has a fluid state as a whole. This includes what is maintained. By using this liquid ice as the stored item 10, it is possible to add a function of maintaining freshness such as fresh food. Further, when a swimming fish such as a tropical fish or a goldfish is used as the stored item 10, water may be introduced as a fluid.

In addition, when a separate introduction part is provided for the buffer space 12 and the storage space 16 and an inflow part 34 between them is not provided, separate fluids are introduced into the buffer space 12 and the storage space 16. Can do. Specifically, an example in which air is sealed in the buffer space 12 and an inert gas or liquid ice is sealed in the storage space 16 can be shown.

(Second Embodiment)
Next, with reference to FIG. 4, a bag according to a second embodiment will be described.
This bag body is different from the previous example in that the bag body is provided with a loading / unloading port for loading / unloading the stored item 10 in / from the storage space 16, and a seal 51 is provided at the loading / unloading port. Description of similar parts is omitted.

Specifically, out of the peripheral seal 18, one side (upper side in FIG. 1A) serving as the entrance of the bag body according to the first embodiment is used as an entrance and exit, and the chuck 51 is inserted into the entrance and exit. The male chuck tape 52 and the female chuck tape 53 are respectively attached to the inner side of the first inner sheet 31 and the second inner sheet 32 on one side as the entrance and exit. On the other three sides, four outer sheets 20 and inner sheets 30 are sealed with a peripheral seal 18.

The chuck 51 can be selected and used in various ways as a chuck for opening and closing the bag body, and its mounting structure may be in accordance with a regular method. In this example, the male chuck tape 52 and the female chuck tape 53 are used. At least one of the chucks 51 is fixed by the fixing seal 54 on one side (the upper side in FIG. 4C) closer to the outside of the bag in the width direction, and the other side (FIG. 4 ( In C), the lower side) is not fixed. As a result, the fluid enters between the second inner sheet 32 and the female chuck tape 53 as shown by an arrow in FIG. 4B, so that the male chuck tape 52 and the female chuck tape 53 are fitted. There is an advantage that the pressure by the fluid can be applied in a direction that does not come off and the sealing property can be improved.

(Example of change)
The present invention can be implemented with various modifications. In the illustrated embodiment, the check valve 41 is provided in the buffer space 12 and the inflow portion 34 is provided in the inner seat 30. A check valve 41 may be provided in the space 17, and an inflow portion 34 may be provided in the inner seat 30. In this case, the check valve 41 provided in the storage space 16 should be understood as an inflow portion with respect to the storage space 16. Further, a check valve 41 may be provided in each of the buffer space 12 and the storage space 16, and in this case, the check valve 41 provided in the storage space 16 is understood as an inflow portion.

Furthermore, in the illustrated embodiment, the two buffer spaces 12 of the first buffer space 13 and the second buffer space 14 are provided on the upper and lower sides of the storage space 16, but the first buffer space 13 and the second buffer space 14 are provided. It is also possible to implement a structure in which only one of them is provided and the other is not provided. In this case, the storage space 16 is not disposed inside the outer bag 11, but a buffering effect can be exhibited by arranging the outer bag 11 on one surface of the storage space 16. For example, when a plurality of bags are stacked and stored in a box, the buffer space 12 can be arranged substantially above and below the storage space 16.

DESCRIPTION OF SYMBOLS 10 Storage thing 11 Outer bag 12 Buffer space 13 First buffer space 14 Second buffer space 15 Inner bag 16 Storage space 17 Auxiliary space 18 Perimeter seal 20 Outer sheet 21 First outer sheet 22 Second outer sheet 30 Inner sheet 31 First Inner sheet 32 Second inner sheet 33 Restriction seal 34 Inflow portion 41 Check valve 51 Chuck 52 Male chuck tape 53 Female chuck tape 54 Fixed seal

Claims (5)

Two bags, a buffer bag and a storage bag, are arranged in the thickness direction,
The storage bag includes a storage space in which stored items are arranged, and includes a buffer space that encloses a fluid in the buffer bag. The fluid in the buffer bag absorbs the stored items in the storage bag. In the bag configured to form
While having an inflow portion of the fluid to the storage space,
The size of the storage space is regulated to be equal to or less than the size that allows the fluid to enter the buffer space. Two outer sheets constituting the buffer bag, and two inner sheets constituting the storage bag,
The two outer sheets and the two inner sheets are the same size,
The buffer space and the storage space are connected by the inflow portion provided in the inner sheet,
The bag body with a buffer function according to claim 1, wherein a check valve for introducing a fluid from outside is disposed in at least one of the buffer space and the storage space. The storage bag includes a central storage space and auxiliary spaces arranged on the left and right sides thereof, and the storage space and the auxiliary space are directly or indirectly connected to the buffer space. Item 3. A bag body with a buffer function according to Item 1 or 2. The bag with shock-absorbing function according to any one of claims 1 to 3, wherein the storage space includes a loading / unloading port for loading and unloading the stored item, and the loading / unloading port includes a sealable seal. . A bag body with a buffer function according to any one of claims 1 to 4, an article that requires freshness retention, and a fluid that has a freshness retaining effect on the article,
The article is stored in the storage space as the stored item,
The fluid having the freshness retaining effect is sealed in at least the storage space,
A packaging structure for an article, characterized in that both the freshness retention and the buffering effect of the stored items are exhibited.

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