WO2020115834A1

WO2020115834A1 - Airtightly sealed bag equipped with check valve

Info

Publication number: WO2020115834A1
Application number: PCT/JP2018/044687
Authority: WO
Inventors: 田中幹雄
Original assignee: 有限会社田中テクニカル
Priority date: 2018-12-05
Filing date: 2018-12-05
Publication date: 2020-06-11
Also published as: JP6632109B1; JPWO2020115834A1

Abstract

Provided is an airtightly sealed bag comprising a structure in which the function of a check valve is not readily affected even when the bag is expanded, and in which it is possible to suppress formation of dead space in a portion where a valve sheet is present, from the standpoint of storage. A front valve sheet 31 and a reverse valve sheet 32 are arranged between a front bag sheet 21 and a reverse bag sheet 22. The front valve sheet 31 and the reverse valve sheet 32 are not sealed, and the space between these two sheets also functions as a storage space. A check valve 14 is provided with a restriction seal 43 above valve seals 41, 42, whereby expansion of the bag is prevented from adversely affecting the closing function of the check valve 14.

Description

Sealing bag with check valve

The present invention relates to a check bag with a check valve.

In the check bag with a check valve, the storage space inside the bag body can be sealed in a substantially airtight state, and various gases such as air existing in the storage space are discharged to the outside of the bag to maintain the state. A check valve is used. In addition, this check valve connects the storage space and the outside of the bag so that the storage space can be filled with various gases and liquids and can be ventilated. At this time, the valve passage, which is a space through which the gas passes, is opened and closed, thereby allowing the passage of the air flow in one direction and blocking the air flow in the other direction.

(Regarding Patent Document 1)
A compression bag shown in Patent Document 1 is used as a kind of the above-mentioned closed bag. This compression bag is a bag body formed by adhering a required portion of a flexible synthetic resin sheet by heat sealing or the like, and having a storage portion that is a space surrounded by the sheet, and is configured to remove gas from the storage portion. A check valve is provided to discharge the bag to the outside and maintain its state. This compression bag is provided with an opening portion for putting an article in and out of a storage portion, and this opening portion is provided with a closing means such as a chuck for keeping the opening portion in a sealed state.

As a prior art document relating to this compression bag, Patent Document 1 can be shown. The compression bag according to Patent Document 1 is provided with check valves at both corners of the bag, and the check valve has a flat resin outer cylinder sheet so that the inside and the outside are continuous. And a flexible resin valve seat provided inside the outer tubular portion. The valve seat permits the passage of airflow from the sealed storage section to the outside of the compression bag and blocks the airflow in the opposite direction. Keeps one's mood.

This is particularly effective for articles such as clothes and blankets that contain air and become large in volume, and the air contained in the article itself can be discharged to the outside of the compression bag. The compression bag can be made compact. Therefore, this compression bag is suitable as a storage bag for clothes and a travel bag for travel supplies.

However, since this check valve is manufactured separately from the bag sheet that constitutes the storage part and is incorporated when the storage part is formed later, the check valve manufacturing line and the check valve are Each requires a line to be incorporated into the main body, which inevitably complicates the compression bag manufacturing line and manufacturing process.

(Regarding Patent Document 2)
On the other hand, as another type of compression bag, there is one related to the invention disclosed in Patent Document 2. By sandwiching a valve sheet between two facing bag sheets and heat-sealing the bag sheet and the valve sheet in a predetermined shape, a plurality of check valves are arranged in the longitudinal direction of the valve sheet. It was formed. In this compression bag, the check valve is integrally formed during the manufacturing process of the bag body, and unlike the compression bag of Patent Document 1, there is an advantage that it can be manufactured in one manufacturing line.

However, in the compression bag according to Patent Document 2, it is not possible to store articles in the portion where the valve seat is arranged, and the size of the storage portion becomes smaller than the size of the bag sheet. I couldn't avoid it. In other words, the portion where the valve seat is arranged is a dead space that cannot be used as a storage space.

Registered Utility Model No. 3025235 International Publication No. 2005/66032 Pamphlet

INDUSTRIAL APPLICABILITY The present invention has a structure in which the function of the check valve is unlikely to be affected even when the bag is inflated, and from the viewpoint of storage, it is possible to prevent the portion where the valve seat exists from becoming a dead space. The challenge is to provide.

TECHNICAL FIELD The present invention relates to an improvement of a sealing bag including a bag body including a front bag sheet and a back bag sheet, the inside of which is a storage space for an object to be stored, and a check valve provided in the bag body. In the sealing bag of the present invention, the front valve sheet is arranged along the lower side of the front bag sheet, and the back valve sheet is arranged along the lower side of the back bag sheet. The front valve sheet and the back valve sheet have the same left and right widths as the front bag sheet and the back bag sheet, and the left and right sides and the lower sides thereof are joined by a bag seal together with the front bag sheet and the back bag sheet. There is.
The check valve includes a valve passage serving as a fluid flow path between the front valve seat and the back valve seat. One end of the valve passage is an in-bag opening that opens to the storage space inside the bag body, and the other end of the valve passage is an outside-bag opening that opens to the outside of the bag body.
The check valve is arranged at a lower corner of the bag body, the width of the valve passage is defined by a valve seal, and the check valve is configured in a state where the bag body is inflated. Except for the portion, the front valve sheet is along the front bag sheet and the back valve sheet is along the back bag sheet, and the space between the front valve sheet and the back valve sheet is widened, so that the check is performed. The storage space is also formed between the front valve seat and the back valve seat excluding the portion that constitutes the valve.
More preferably, a regulation seal may be provided in front of the opening in the bag. In the state where the bag body is inflated, the restriction seal prevents the opening between the front valve seat and the back valve seat, and the bottom portion of the bag body is deformed into a bottom shape having a front and rear width. Can be configured as.
The valve seal is made by sealing four sheets of the front bag sheet, the back bag sheet, the front valve sheet and the back valve sheet, and the valve seal is a first valve seal and the first valve. A second valve seal may be provided between the seal and a second valve seal, which is arranged at a distance serving as the valve passage.
The valve passage includes a bag outer opening that opens to the outside of the bag body, and the left and right sides of four sheets of the front bag sheet, the back bag sheet, the front valve seat, and the back valve seat, and The lower sides are sealed by the bag seal except for the bag outer opening at the lower end of the valve passage.
The upper side of the front valve sheet shall be fixed to the front bag sheet over its entire length by a front valve fixing seal, and the upper side of the back valve sheet shall be fixed to the back bag sheet over its entire length. It can be fixed by a back valve fixed seal. The upper side of the front valve seat and the upper side of the back valve seat may be unsealed except for the valve seal and the restriction seal of the check valve.
Further, the bag seal can be implemented as one including a side bag seal extending along the left and right sides of the bag body and a bottom bag seal extending along the bottom of the bag body. In this case, the first valve seal and the second valve seal may be inclined with respect to the side bag seal and the bottom bag seal. At that time, the first auxiliary seal connecting the tip of the first valve seal and the side bag seal can be formed to extend obliquely. Also, a second auxiliary seal connecting the tip of the second valve seal and the side bag seal can be formed to extend obliquely. The regulation seal is arranged at a position closer to the bottom bag seal than the intersection of the first auxiliary seal and the side bag seal, and is more than the intersection of the second auxiliary seal and the bottom bag seal. It may be arranged at a position close to the side bag seal.

INDUSTRIAL APPLICABILITY The present invention has a structure in which the function of the check valve is unlikely to be affected even when the bag is inflated, and from the viewpoint of storage, it is possible to prevent the portion where the valve seat is present from becoming a dead space. Was able to provide.
Further, the check valve-equipped sealed bag of the present invention can be embodied so that the bag body and the check valve can be manufactured in one line.

The sealing bag with a check valve which concerns on 1st Embodiment is shown, (A) is a principal part top view, (B) is explanatory drawing of the seat structure in the BB line cross section of (A), (C). 6A is an explanatory view of a seat structure in a cross section taken along line CC of FIG. 7A, and FIG. 6D is an explanatory view of a seat structure in a cross section taken along line DD of FIG. (A) is a plan view of a check bag with a check valve according to the first embodiment, (B) is a plan view of a check bag with a check valve according to the second embodiment, and (C) is a third view. FIG. 4 is a plan view of the check bag with the check valve according to the embodiment. It is a principal part explanatory view in a state where the check bag with a check valve is inflated. It is a principal part top view which shows the modification of the sealed bag with a check valve which concerns on 2nd Embodiment. (A) is a principal part plan view of a check valve-equipped sealed bag according to a fourth embodiment, and (B) is a principal part plan view of a check valve-equipped sealed bag according to a fifth embodiment.

Embodiments of the present invention will be described below with reference to the drawings.
In the following embodiments, the inlet/outlet opening of the enclosed bag 11 is described as the upper side, but in the present invention, the front and rear, the upper and lower sides, and the left and right sides show only a relative positional relationship, and are absolute. It should not be construed as location specific.

(Overall structure of the sealing bag)
The sealing bag 11 according to the first embodiment shown in FIGS. 1 and 2A includes a bag body 12 and a check valve 14 formed on either one or both of the left and right lower ends of the bag body 12. Prepare

The bag body 12 is composed of two

bag sheets

21 and 22 including a front bag sheet 21 and a back bag sheet 22 as in a normal bag, and is formed between the front bag sheet 21 and the back bag sheet 22. The space serves as a storage space 13 for containing a stored object.
In the sealing bag 11 according to this embodiment, in order to provide the check valve 14, the two

valve seats

31, 32 including the front valve seat 31 and the back valve seat 32 are provided along the lower sides of the bag seats 21, 22. It is arranged.

The upper side of the sealing bag 11 is a portion that serves as a loading/unloading port for the items to be stored, and a tape-shaped chuck 25 for closing the loading/unloading port in a sealed state heat-seals the front bag sheet 21 and the back bag sheet 22. It is adhered by. The chuck 25 can be embodied as a well-known form in which two ridges are provided in one set, a convex strip is provided on one side, and a concave shape that fits with the convex strip is provided on the other side, and can be closed in a sealed state. The opening/closing means may be changed to another opening/closing means. For example, in the case of implementing as a bag for selling food, the heat seal is performed in a state where the object to be stored is stored without providing the opening/closing means such as the chuck 25. It does not matter even if it closes.

Both the left and right sides of the front bag sheet 21 and the back bag sheet 22 are joined by a side bag seal 23 over the entire length. The bottom side of the four sheets of the front bag sheet 21, the front valve sheet 31, the back valve sheet 32, and the back bag sheet 22 is entirely covered by the bottom bag seal 24 except for the bag outer opening 17 on the lower end side of the check valve 14. Are joined together.

The sealing bag 11 according to this embodiment is implemented as a compression bag for accommodating clothes, bedding and the like and discharging the internal air from the check valve 14 to the outside to reduce the volume. In that case, the check valve 14 functions as a check valve that allows the passage of air from the inside of the bag to the outside and stops the invasion of the inside from the outside, and the outside opening 17 of the bag serves as an outlet.
On the other hand, as a check valve 14 for preventing air from forcibly sending fluid such as liquid into the inside of the closed sealing bag 11 from the check valve 14 and flowing out of the sent internal fluid to the outside. It can also be implemented.

(About valve seat)
The valve sheets of the front valve sheet 31 and the back valve sheet 32 are preferably thinner than the bag sheets of the front bag sheet 21 and the back bag sheet 22. The

bag sheets

21 and 22 have the same strength, thickness and flexibility as the storage bag made of synthetic resin according to the purpose of use, but the

valve sheets

31 and 32 have the sealing bag 11 Since it is necessary to switch between the state in which the storage space 13 is in close contact and the state in which the storage space 13 is in a close contact with each other due to a change in atmospheric pressure, the sheet is preferably thin and highly flexible. Specifically, the

bag sheets

21 and 22 having a thickness of about 45 to 70 μm are used, while the

valve sheets

31 and 32 having a thickness of about 20 to 40 μm are preferably used.

Further, it is also preferable to adopt a film having self-adhesiveness on the surfaces where the front valve sheet 31 and the back valve sheet 32 face each other. Furthermore, an adhesive liquid such as silicon may be applied between the front valve sheet 31 and the back valve sheet 32.
The right and left sides of the front valve sheet 31 and the back valve sheet 32 are joined to the front bag sheet 21 and the back bag sheet 22 by the side bag seals 23, and the front bag sheet 21, the front valve sheet 31, Four sheets of the back valve sheet 32 and the back bag sheet 22 are joined by the side bag seal 23.

The lower sides of the front valve sheet 31 and the back valve sheet 32 are joined to the front bag sheet 21 and the back bag sheet 22 by a side bag seal 23 except for the bag outer opening 17 of the check valve 14. , The front bag sheet 21, the front valve sheet 31, the back valve sheet 32, and the back bag sheet 22 are joined by the bottom bag seal 24.

As described above, the front valve sheet 31 and the back valve sheet 32 are joined to the front bag sheet 21 and the back bag sheet 22 at the left and right sides and the lower side by the side bag seal 23 and the bottom bag seal 24 by heat sealing or the like. There is. On the other hand, the upper sides of the front valve seat 31 and the back valve seat 32 are not joined to each other except for a seal for forming the check valve 14. Thus, the upper side of the front valve seat 31 is joined only to the front bag sheet 21 by the front valve fixed seal 26, and the upper side of the back valve seat 32 is joined only to the back bag sheet 22 by the back valve fixed seal 27. Since the upper sides of the front valve seat 31 and the back valve seat 32 are not joined to each other, the front valve seat 31 and the back valve seat 32 are arranged along the front bag sheet 21 and the back bag sheet 22, respectively. It will be in a state of being. As a result, when the space between the front bag sheet 21 and the back bag sheet 22 expands, the space between the front valve seat 31 and the back valve seat 32 also expands to form a part of the storage space 13.

(About check valve)
The check valve 14 is provided at a position close to the side bag seal 23, and includes the first valve seal 41, the second valve seal 42, the restriction seal 43, the first auxiliary seal 44, and the second auxiliary seal 45. It is formed by partially joining the

seats

21 and 22 and the valve seats 31 and 32. These seals have a check valve function even if only the front valve seat 31 and the back valve seat 32 are joined, but the front bag sheet 21, the back bag sheet 22, the front valve seat 31 and the back valve It is more advantageous to join all four sheets of the sheet 32 from the viewpoint of simplifying the manufacturing process.

(Valve seal)
First, the first valve seal 41 and the second valve seal 42 are seals for defining the valve passage 15, and the fluid such as air in the storage space 13 is protected by the first valve seal 41 and the second valve seal 42. It flows out between the front valve seat 31 and the back valve seat 32 in a state where both sides are joined to each other. In other words, the first valve seal 41 and the second valve seal 42 are arranged with a space serving as the valve passage 15 therebetween. In this example, the first valve seal 41 and the second valve seal 42 are straight lines that are substantially parallel to each other, but they may be inclined or curved.

The upper end of the valve passage 15 is opened as an opening 16 in the bag inside the storage space 13, and the lower end of the valve passage 15 is opened as an opening 17 outside the bag to the outside of the sealing bag 11. In this example, the check valve 14 is implemented as a check valve that allows the fluid inside the storage space 13 to pass to the outside and prohibits the intrusion of the fluid from the outside. And the opening 17 outside the bag serves as an outlet to the outside.

(Auxiliary seal)
The auxiliary seal is used to smoothly guide the fluid inside the storage space 13 to the in-bag opening 16 of the valve passage 15 or between the two

bag sheets

21 and 22 or between the

bag sheets

21 and 22 and the valve seats 31 and 32. It is made by joining four sheets. Specifically, the first auxiliary seal 44 is formed between the upper end of the first valve seal 41 and the side bag seal 23, and the second auxiliary seal 45 is formed between the upper end of the second valve seal 42 and the bottom bag seal 24. It is formed between. Due to the presence of the first auxiliary seal 44, when the fluid is discharged, the fluid enters between the first valve seal 41 and the side bag seal 23, and is unnecessary for the front valve seat 31 and the back valve seat 32 in the valve passage 15. It is possible to prevent a great deal of tension. Further, due to the presence of the second auxiliary seal 45, the fluid enters between the second valve seal 42 and the bottom bag seal 24 at the time of discharging the fluid, which is useless for the front valve seat 31 and the back valve seat 32 in the valve passage 15. It is possible to prevent a great deal of tension.

More specifically, the first auxiliary seal 44 is inclined in the opposite direction to the first valve seal 41 and extends obliquely upward. In other words, since the first auxiliary seal 44 extends so as to approach the side bag seal 23 as it goes upward from the upper end of the first valve seal 41, the smooth fluid can be guided to the bag inner opening 16. The second auxiliary seal 45 is inclined in the opposite direction to the second valve seal 42 and extends obliquely downward. In other words, since the first auxiliary seal 44 extends so as to approach the side bag seal 23 as it goes downward from the upper end of the second valve seal 42, the smooth fluid can be guided to the bag inner opening 16.

(Regulatory seal)
A regulation seal 43 is formed above the in-bag opening 16. By forming the regulation seal 43, the opening between the front bag sheet 21 and the back bag sheet 22 is suppressed when the bag body 12 is inflated. As a result, as shown in FIG. 3, including the introduction region 46 between the restriction seal 43 and the opening 16 in the bag, the space between the front bag sheet 21 and the back bag sheet 22 that constitutes the check valve 14 is provided. Opening and opening between the front valve seat 31 and the back valve seat 32 are suppressed. Therefore, the stacked state of these sheets is maintained, the check valve effect is stably exhibited, and it is possible to prevent the bag bulge from adversely affecting the closing function of the check valve 14.

Moreover, when the bag body 12 swells, the regulation seal 43 swells as an intermediate reference, so that the bottom portion of the bag body is deformed into a so-called boat-shaped bottom having a width in the front and rear. That is, the bottom of the bag body is likely to swell in a boat shape similar to a gusset, and is likely to swell in a three-dimensional shape.

(Regulation seal position)
In the embodiment shown in FIG. 1 and FIG. 2(A), the regulation seal 43 is provided at a position beyond the ends of the valve seats 31, 32, and the regulation seal 43 includes two sheets of the

bag sheets

21, 22. I just heat-sealed the sheet.
In the embodiment shown in FIG. 2(B), a regulation seal 43 is provided near the ends of the valve seats 31, 32, and the regulation seal 43 as a whole is in the bag seats 21, 22 and the valve seat 31. , 32 sheets are heat-sealed.
In the embodiment shown in FIG. 2(C), the restriction seal 43 is provided at the end of the valve seats 31, 32, and a part of the restriction seal 43 is formed between the bag seats 21, 22 and the valve seats 31, 32. Although the four sheets are heat-sealed, the other part of the regulation seal 43 is merely heat-sealing the two

sheets

21 and 22.

As described above, the regulation seal 43 may be formed by heat-sealing the four sheets of the

bag sheets

21 and 22 and the

valve sheets

31 and 32. The other part of the regulation seal 43 is the bag sheet 21, The two sheets 22 may be heat-sealed.
It is desirable that the restriction seal 43 be disposed below the intersection of the first auxiliary seal 44 and the side bag seal 23 (that is, at a position near the bottom bag seal 24). Further, it is desirable that the restriction seal 43 be arranged at a position closer to the side bag seal 23 than the intersection of the second auxiliary seal 44 and the bottom bag seal 24 (right side in FIG. 1A).

(Number and shape of regulatory seals)
As shown in FIG. 4, a plurality of regulation seals 43 may be provided and implemented. Further, the shape thereof may be a linear shape other than a circular point shape.

(Direction of extension of valve passage)
In the example of FIG. 1, the valve passage 15 (in other words, the first valve seal 41 and the second valve seal 42) is inclined with respect to the side bag seal 23 and the bottom bag seal 24, and the left and right sides of the bottom portion of the sealing bag 11 are inclined. It is implemented as extending obliquely upward from the end. By inclining in this way, it is possible to prevent the check valve 14 from becoming long in only one of the vertical direction and the horizontal direction.

Specifically, it may extend right above as shown in FIG. 5(A), or may extend right next to it as shown in FIG. 4(B). In these cases, one of the two valve seals 40 for forming the valve passage 15 may be shared with the side bag seal 23 or the bottom bag seal 24. However, in the case of common use, when the bag body 12 is inflated, the influence of the deformation of the bag easily reaches the valve passage 15. Therefore, two valve seals, the first valve seal 41 and the second valve seal 42, are provided. However, it is desirable to make them extend obliquely.

Further, as for the bag outer opening 17, an opening may be provided in a part of the bottom bag seal 24 and opened in the bottom part of the sealing bag 11, or an opening may be provided in a part of the side bag seal 23. It may be open on the side of 11 or open on both sides (that is, open on the corner).

(Application example of the present invention)
INDUSTRIAL APPLICABILITY The present invention can be implemented as a compression bag that can be used for packaging and compressed storage of various articles such as clothing and bedding, and for storing food and discharging the internal air to the outside for storage. It can also be implemented as a device used for, and its size and shape can also be implemented by changing the address.

For example, in the example of FIG. 2(B), the check valve 14 is provided at the bottom of the bag having a hole 18 for hanging so as to facilitate the sale of the hanging.
In the example of FIG. 2C, the same hanging hole 18 as that described above is provided in the upper portion, but a chuck 25 for opening is provided on one side of the bag and the other side (see FIG. The check valve 14 is provided on the upper and lower sides.
The heat sealing can be carried out by changing to other fusion bonding means such as ultrasonic welding or the like, or other joining means such as adhesive bonding, in addition to heat welding using a mold.
As described above, the present invention can be implemented with various modifications.

11 Sealing Bag 12 Bag Body 13 Storage Space 14 Check Valve 15 Valve Passage 16 Bag Inside Opening 17 Bag Outside Opening 18 Hanging Hole 21 Front Bag Sheet 22 Back Bag Sheet 23 Side Bag Seal 24 Bottom Bag Seal 25 Chuck 26 Front valve fixed seal 27 Back valve fixed seal 31 Front valve seat 32 Back valve seat 40 Valve seal 41 First valve seal 42 Second valve seal 43 Regulation seal 44 First auxiliary seal 45 Second auxiliary seal 46 Introductory area

Claims

In a bag for sealing, which includes a bag body having a front bag sheet and a back bag sheet, the inside of which is a storage space for a stored object, and a check valve provided in the bag body,
A front valve sheet is arranged along the lower side of the front bag sheet,
A back valve sheet is arranged along the lower side of the back bag sheet,
The front valve sheet and the back valve sheet have the same left and right widths as the front bag sheet and the back bag sheet, and their left and right sides and lower sides are joined by a bag seal together with the front bag sheet and the back bag sheet,
The check valve includes a valve passage serving as a fluid flow path between the front valve seat and the back valve seat,
One end of the valve passage is an in-bag opening that opens into a storage space inside the bag body, and the other end of the valve passage is an outside-bag opening that opens to the outside of the bag body,
The check valve is arranged at a lower corner of the bag body, and the width of the valve passage is defined by a valve seal.
In a state where the bag body is inflated, the front valve sheet is along the front bag sheet and the back valve sheet is along the back bag sheet, except for the portion that constitutes the check valve, and the front valve sheet. And a space between the back valve seat and the back valve seat are widened, so that the storage space is also formed between the front valve seat and the back valve seat excluding a portion forming the check valve. Sealing bag with check valve.
A regulation seal is provided in front of the opening in the bag,
In the state where the bag body is inflated, the restriction seal prevents the opening between the front valve seat and the back valve seat, and the bottom portion of the bag body is deformed into a bottom shape having a front and rear width. The sealing bag with a check valve according to claim 1, wherein the bag has a check valve.
The valve seal is one obtained by sealing four sheets of the front bag sheet, the back bag sheet, the front valve sheet and the back valve sheet,
The valve seal includes a first valve seal and a second valve seal that is arranged between the first valve seal and the first valve seal at a distance that serves as the valve passage.
The valve passage includes a bag outer opening that opens to the outside of the bag body,
The right and left sides and the lower sides of the four sheets of the front bag sheet, the back bag sheet, the front valve sheet and the back valve sheet are formed by the bag seal except for the bag outer opening at the lower end of the valve passage. The sealing bag with a check valve according to claim 1 or 2, which is sealed.
The upper side of the front valve seat is fixed by a front valve fixed seal to the front bag sheet over the entire length thereof,
The upper side of the back valve sheet is fixed to the back bag sheet over its entire length by a back valve fixed seal,
The check valve according to claim 3, wherein the top side of the front valve seat and the top side of the back valve seat are not sealed except for the valve seal and the restriction seal of the check valve. Sealing bag with valve.
The bag seal comprises a side bag seal extending along the left and right sides of the bag body, and a bottom bag seal extending along the bottom of the bag body,
The first valve seal and the second valve seal are inclined with respect to the side bag seal and the bottom bag seal,
A first auxiliary seal connecting the tip of the first valve seal and the side bag seal extends obliquely,
A second auxiliary seal connecting the tip of the second valve seal and the side bag seal extends obliquely,
The restriction seal is arranged at a position closer to the bottom bag seal than the intersection of the first auxiliary seal and the side bag seal, and is located at the side of the intersection of the second auxiliary seal and the bottom bag seal. The sealing bag with a check valve according to claim 4, wherein the sealing bag is arranged near the bag seal.