WO2008038330A1

WO2008038330A1 - Sealed bag

Info

Publication number: WO2008038330A1
Application number: PCT/JP2006/318909
Authority: WO
Inventors: Osamu Kawai
Original assignee: Osamu Kawai
Priority date: 2006-09-25
Filing date: 2006-09-25
Publication date: 2008-04-03
Also published as: JP4904360B2; JPWO2008038330A1

Abstract

A sealed bag (1) in which its non-return action can be improved, and which can be manufactured at a low cost and can seal the sealable section (2) in airtight state. Bypass seals (31) to which bag sheets (11, 12) are adhered are so provided on the upper and lower sides of a ventilation passage (3) for permitting the sealable section (2) to communicate with the outside of the bag as to transverse a part of the ventilation passage (3). The lower end (31a1) of the upper bypass seal (31a) and the upper end (31b1) of the lower bypass seal (31b) are arranged on a straight line.

Description

Specification

Sealed bag

Technical field

TECHNICAL FIELD [0001] The present invention relates to a sealed bag that can hold the inside in an airtight state.

Background art

[0002] Patent Document 1: Special Table 2003—507264 Publication

[0003] Conventionally, a flexible resin sheet has been used, and the sealing portion can be sealed in an airtight state, and various gases such as air existing in the sealing portion can be sealed. In order to discharge to the outside of the bag and maintain its state, or to fill this sealing portion with various gases, the sealing portion and the outside of the bag can be vented and closed A sealed bag with a connecting air passage is used!

[0004] As an embodiment of the above-described sealed bag, there are various types such as a clothes compression bag for storage in a closet or the like, and a travel compression bag. As an example showing the configuration, Patent Document 1 discloses. There is a compression bag 101 described. As shown in FIG. 9, the required portions of a plurality of sheets made of flexible resin are bonded together by heat sealing or the like to form a sealed portion 102 having a space surrounded by these sheets. It is a bag.

[0005] The compression bag 101 is provided with an opening 103 through which a stored article is taken in and out of the sealing portion 102. The opening 103 is provided with a closing means 104 such as a chuck for sealing the opening 103.

[0006] The compression bag 101 is formed with a check valve 105 configured by inserting an intermediate sheet 106 between two opposing bag sheets 102a and 102b. This check valve 105 has a venting passage for deaeration between the bag sheets 102a, 102b and the intermediate sheet 106, which communicates from the sealing portion 102 to the outside of the bag. The bag sheets 102a, 102b And the intermediate sheet 106 are brought into close contact with each other, thereby performing a non-return action.

[0007] In using the compression bag 101, first, the user inserts the stored article into the sealing portion 102 from the opening 103 and closes the closing means 104. Next, the user presses the sealing portion 102 and degass the air present in the sealing portion 102 from the check valve 105 to the outside of the bag. here, Since the air passage formed in the check valve 105 extends linearly as shown in the figure, deaeration is performed quickly. In the state after deaeration, the bag sheets 102a, 102b and the intermediate sheet 106 are brought into close contact with each other by the pressure of the air around the bag, and the air outside the bag is prevented from flowing backward.

[0008] The compressed bag 101 having this structure can be degassed quickly, and can exhibit a non-return action without providing a complicated valve mechanism, and can be manufactured easily and at low cost. There is an advantage of being able to.

[0009] However, since this compression bag 101 is simply a product in which the intermediate sheet 106 is sandwiched between the bag sheets 102a and 102b, the check action is impaired due to wrinkles on each sheet. S, and there is a disadvantage that the degassing state of the sealing portion 102 cannot be maintained for a short time.

[0010] In view of this, the inventors of the present application have considered that the airflow is meandered by alternately sealing each other and attaching the sheets in the air passage to improve the check effect.

[0011] However, simply forming a different seal as described above still eliminates the above-described drawback that the check action is impaired due to wrinkles on each sheet. However, the improvement of the check effect was not so much achieved.

[0012] Therefore, in view of the above, the present invention has an object to provide a sealed bag that has the advantage of being able to manufacture a bag at a low cost, while improving the check effect.

Disclosure of the invention

[0013] In order to solve the above-mentioned problem, the invention according to claim 1 of the present application uses a flexible resin sheet, and can seal the sealing portion 2 in an airtight state. The state in which the gas existing in the sealing part 2 is discharged to the outside of the bag can be maintained, or the state in which the sealing part 2 is filled with gas can be maintained. In the sealing bag 1 provided adjacent to the sealing part 2, the ventilation path 3 for connecting the air passages in such a manner as to be able to ventilate and close is connected to the inner communication leading to the sealing part 2. Part 3a and outer communication part 3b that communicates with the outside of the bag, and the bag sheets 11, 12 are overlapped and bonded to each other so that at least a pair of air passage side part seals 15 facing each other 15 , 16 are formed, and one side of the above-mentioned air passage side seals 15, 16 15 Therefore, the sealing part 2 and the ventilation path 3 are partitioned by the inner communication. The portion 3a is a portion between the sealing portion 2 and the air passage 3 and without the air passage side seal 15 on the one side, and at least of the air passage side seals 15 and 16 described above. The other side 16 partitions the air passage 3 and the outside of the bag, and the outer communication portion 3b is between the air passage 3 and the outside of the bag, and is on the other side. A bypass seal 31 is provided in a part of the portion where the air passage side seal 16 does not exist and crosses a part of the air passage 3 described above. 11 and 12 and a sheet having a relationship opposite to each of the bag sheets 11 and 12 are formed by being overlapped and attached, and the detour seal 31 is formed in the air passage 3 described above. Are provided near the side seals 15 and 16, respectively. There are at least three or more detour seals 31, of which one side detour seal 3 la provided near one side of the airway side seal 15 and one side of the airflow path side seal 16 close to the other side. One or more of the other side detour seals 31b provided are each provided with a tip 3 lal of each of the one side detour seals 3 la and each of the other side detour seals 31b. Provided is a sealed bag characterized in that the tip 31bl is aligned in a straight line.

[0014] In the following description of the embodiment, among the vent-side seals 15 and 16, the one shown on the upper side in FIG. 1 is referred to as the partition seal 15 and the one shown on the lower side is the bottom. It will be called Museal 16. In addition, the above-mentioned “sheets facing the bag sheets 11 and 12” include the bag sheets 11 and 12 themselves. For example, when no sheet is coordinated between the bag sheets 11 and 12.

[0015] Further, the invention according to claim 2 of the present application is configured by two opposing sheets 11, 12, and is configured to be able to vent between each of the above sheets 11, 12. The pair of air passage side seals 15 and 16 in the opposing relationship are in a substantially parallel relationship, and the tip 31al of each one-side bypass seal 31a and the other-side bypass seal described above. 2. The sealed bag according to claim 1, wherein an end face shape of the tip 3 lbl is a shape that coincides with the straight line C. 3.

[0016] In addition, the invention according to claim 3 of the present application is configured by the three sheets 11, 12, and 13 facing each other, and each of the sheets 11, 12, and 13 can be ventilated. And The pair of air flow path side seals 15 and 16 in the opposing relationship are in a substantially parallel relationship, and the tip 31al of each one-side bypass seal 31a and each other-side bypass seal are connected to each other. 2. The sealed bag according to claim 1, wherein an end face shape of the tip 31bl is a shape that coincides with the straight line C.

[0017] Further, the invention according to claim 4 of the present application is a portion provided with the air passage 3 in each of the sheets 11, 12, and 13 at least on the side facing the other sheets. 4. The sealed bag according to claim 2 or 3, wherein a part of the surface is provided with weak adhesiveness.

[0018] Further, the invention according to claim 5 of the present application is the non-volatile liquid coordinated to at least the surface in any one of the sheets 11, 12, and 13 described above. The sealed bag according to claim 4, wherein the sealed bag is provided by 5.

[0019] Further, in the invention described in claim 6 of the present application, the bypass seal 31 has a triangular shape provided so as to protrude from the air passage side seals 15, 16 into the air passage 3. The detour seal 3 la on one side, which is adjacent to each other in the air passage 3, protrudes from each air passage side seal 15 on one side, and the detour seal 31b on the other side , Protruding from the respective air passage side seals 16 on the other side, and arranged in line with the apexes 31al and 31bl of the triangular bypass seals 31 in a straight line. 6. The hermetically sealed bag according to claim 5, wherein silicon oil is used as the liquid 5.

[0020] Further, the invention described in claim 7 of the present application is characterized in that as the three sheets 11, 12, 13, sheets having the same constitution and thickness of the resin are used. A sealed bag according to claim 3 is provided.

[0021] Further, in the invention according to claim 8 of the present application, the intermediate sheet 13 has at least a front piece 13a and a rear piece 13b overlapped in the front-rear direction, and is coordinated on the front side. Between the front bag sheet 11 and the front piece 13a and between the rear bag sheet 12 arranged on the rear side and the rear piece 13b. There is a dead space 3y between 13a and the rear piece 13b. The dead space 3y is one end of the intermediate sheet 13 with respect to the air flow direction in the air passage 3. ~ side Is closed by integrating the front piece 13a and the rear piece 13b. On the other end side, the front piece 13a and the rear piece 13b are separated. Therefore, the sealed bag according to claim 3, wherein the sealed bag is opened.

[0022] Further, the invention according to claim 9 of the present application is such that the intermediate sheet 13 is formed by folding one sheet, and each of the above-mentioned bags of the intermediate sheet 13 is folded. The adhesive surface 13d, which is the surface that is in close contact with the sheets 11, 12, is given weak adhesion, and the separation surface 13e, which is the surface on the side where the intermediate sheets 13 face each other, has heat sealing properties. The sealed bag according to claim 8, wherein the sealed bag is not provided.

[0023] In the invention according to claim 10 of the present application, the end side of the intermediate sheet 13 is arranged closer to the inner side of the sealing bag 1 than the end side of each of the bag sheets 11 and 12. A sealed bag according to claim 9, characterized in that

Brief Description of Drawings

FIG. 1 is a plan view showing a compression bag as an example of an embodiment of the present invention.

FIG. 2 is an exploded perspective view showing a configuration of a compression bag as an example of an embodiment of the present invention.

FIG. 3 is a plan view showing a compression bag which is another example of the embodiment of the present invention.

[041] (A) and (B) are plan views of main parts showing a compression bag as another example of the embodiment of the present invention.

[FIG. 5] (A) and (B) are plan views of the main part showing a desirable position for coordinating the non-volatile liquid 5 in the air passage.

FIG. 6 is a plan view of the main part showing a compression bag which is another example of the embodiment of the present invention.

FIG. 7 is an exploded perspective view showing a configuration of a compression bag as another example of an embodiment of the present invention.

[FIG. 8] (A) is an end view of the main part as viewed in the direction of arrows A—A in FIG. 7, showing the air flow in the air passage, and (B) is an end view of the air in the air passages, shown in FIG. It is an end view of the main part in view, (C) shows the inner communication part, (A) is an end view of the main part in the C—C arrow view of (A), (D) shows the outer communication part, (B It is an end elevation of the principal part in DD arrow of D).

FIG. 9 is an exploded perspective view showing a configuration of a compression bag in an example of a conventional embodiment. BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, as an example of a sealed bag according to an embodiment of the present invention, a compressed bag 1 that is a type of bag used by degassing a sealed portion will be described. This is used, for example, for storing a storage article M such as clothing and storing it in a trunk in a compressed state by degassing the bag during travel. Note that the compression bag 1 according to the present invention is positioned as a simple type, and does not require a perfect check effect, so long as the deaerated state is maintained for a certain period of time.

[0026] In this example, the force to explain the type of bag used after degassing the inside of the bag as described above. The invention of the present application is not limited to this. The bag of the type used by filling the bag with gas is used. However, it can also be applied.

[0027] In the following description, the expressions indicating the position and direction such as “front and back”, “up and down left and right”, and “vertical and horizontal” are arranged as shown in FIG. 1 in order to specify the position. It is determined for convenience on the basis of cases, and the present invention should not be construed as being limited to the positional relationship as described.

As shown in FIG. 1, the compression bag 1 of the present example includes a sealing portion 2 that can be sealed in an airtight state, and an air passage 3 that is provided adjacent to the sealing portion 2.

As shown in FIG. 2, the compressed bag 1 is a bag sheet having a vertically long rectangular shape (front bag sheet 11 and rear bag sheet 12), and a horizontally long rectangular shape shown in FIG. It is composed of an intermediate sheet 13 having a vertical dimension (width dimension) smaller than 12, and the sheets 11, 12, 13 are arranged facing each other. The intermediate sheet 13 is a force that is coordinated so as to be sandwiched between the bag sheets 11 and 12 described above. The intermediate sheet 13 may be omitted because it is not an essential element in the present invention. The intermediate sheet 13 may be coordinated between the bag sheets 11 and 12.

[0030] For each of the sheets 11, 12, and 13 that are the above-described constituent members, a flexible resin sheet is used. Each of the sheets 11, 12, and 13 is a long sheet that is continuous in the longitudinal direction, and a predetermined position of each of the sheets 11, 12, and 13 is set by heat sealing or the like as will be described later with respect to the manufacturing method. After being bonded, it is cut and formed as a bag body in which the sealing portion 2 and the air passage 3 are partitioned.

[0031] The front bag sheet 11 and the rear bag sheet 12 are arranged facing each other in the front-rear direction. Thus, the outer portion of the compression bag 1 is configured. In this example, as the bag sheets 11 and 12, two independent sheets of the same shape are used. One sheet is folded, and one side of the fold is sandwiched between the front bag sheet 11 and the other side. The rear bag sheet 12 may be used. For example, when the compression bag 1 is a double bag, three or more sheets can be used as a bag sheet, and various modifications can be made.

[0032] The resin sheet constituting the bag sheets 11 and 12 includes a plurality of resin films, for example, a laminate of a plurality of polyethylene films (such as LLDPE film), or a polyethylene film and nylon. For example, a film laminated with a film can be exemplified. Note that a sheet in which a plurality of resin films are laminated in this manner is more common than a sheet made of a single material. In addition, polyethylene film has heat-sealability. Nydon film does not have heat-seal. Therefore, when heat-sealing as described later, the polyethylene film layers on the resin sheet face each other. Need to be done. However, nylon film layers may be made to face each other in a part where heat sealing is not performed as described later.

[0033] In each of the sheets 11, 12, and 13, the portion provided with the air passage 3 and at least a part of the surface on the side facing the other sheet is weakly adhered. It is possible to improve the non-return action in combination with the formation of the detour seal 31 described later. Here, the above-mentioned “weak adhesion” refers to a property in which each of the sheets 11, 12, 1 3 facing each other can be easily adhered to each other. Note that the above-mentioned “contact” means that the sheets are in close contact with each other so that the air flow between the sheets facing each other can be blocked.

[0034] Specific examples of the sheet itself having a weak adhesive property include a resin sheet in which polyethylene (LDPE and HDPE) is blended with ethylene / butyl acetate copolymer (EVA). By blending EVA in this way, the flexibility can be improved and the sheets can be easily brought into close contact with each other.

[0035] In addition to the above, the weak adhesive strength of at least one of the above-described sheets 11, 12, 13 is caused by at least a non-volatile liquid 5 such as silicon oil coordinated on the surface. It is also possible that Specifically, this weak adhesion is imparted to each sheet 11, 12, 13 The above-mentioned non-volatile liquid 5 is applied to the surface, or the non-volatile liquid 5 is infiltrated into a powerful intermediate sheet 13 such as a nonwoven fabric.

[0036] The position where the non-volatile liquid 5 is coordinated may be any position as long as it is within the ventilation path 3, but it is particularly coordinated on the path through which the airflow reliably passes during ventilation. Is desirable. Specifically, this desirable position is in the air passage 3, and (X) on the center line C where the tips 31al and 31bl of the detour seal 31 are aligned, and (Y) the detour seal 31 on one side facing each other. This is a position corresponding to either the region formed by each side of the other side detour seal 31 or (Z) the region defined by the extension of the side of the detour seal 31 (Fig. 5 ( A) See (B)). In the compression bag 1 shown in FIG. 1, the areas shown in FIG. 5 (A) are shown. In the compression bag 1 shown in FIG. 4 (A), the areas shown in FIG. 5 (B) are shown. is there. FIGS. 4A and 4B show examples in which the non-volatile liquid 5 is coordinated in the regions (X) and (Y).

[0037] When the intermediate sheet 13 is omitted, it is desirable to impart weak adhesiveness to the inner surface of at least one of the bag sheets 11, 12 that forms the air passage 3. In other words, in the same manner as when the intermediate sheet 13 is given a weak adhesive property, by laminating a resin blended with EVA or by coordinating the non-volatile liquid 5, It is desirable that the bag sheets 11 and 12 be easily adhered to each other.

[0038] When the intermediate sheet 13 is used, the bag sheets 11 and 12 and the intermediate sheet 13 may have the same configuration and thickness of the resin. In this way, when the configurations of all the sheets are made equal, the shrinkage rates in the left and right (longitudinal) directions of the respective sheets can be matched. Therefore, when the compressed bag 1 is manufactured, when the sheets supplied without any break in the longitudinal direction are overlapped and heat-sealed, and then cut into each bag, the difference in contraction rate of each sheet is caused. It is possible to reduce the possibility of the check effect being reduced due to distortion of the sheet of the air passage 3 after cutting.

[0039] Here, the intermediate sheet 13 described above was formed by using one sheet as it is as shown in FIG. 2, but was formed by folding the sheet as shown in FIG. It may be implemented as a thing.

[0040] The intermediate sheet 13 in this example has at least a front piece 13a and a rear piece 13b overlapped in the front-rear direction, and one sheet is folded in half from the fold portion 13c. It has been done. Details of the operation and effect of this configuration will be described later.

Next, the sealing part 2 and the air passage 3 will be described. The sealing portion 2 is a portion formed between the front bag sheet 11 and the rear bag sheet 12 and having a space in which the stored article M can be stored.

Specifically, as shown in FIG. 1, the sealing portion 2 is formed by integrally bonding the overlapped bag sheets 11 and 12 and the intermediate sheet 13, and Shown more than the compartment seal 15 and its extension line defined by the bag side seal 14 formed vertically to define both ends and the compartment seal 15 formed extending in the horizontal direction in the figure. It is the upper part. The partition seal 15 is not provided in a portion where the sealing portion 2 and the air passage 3 communicate with each other. This portion is the inner communication portion 3a, and air can pass from the sealing portion 2 to the air passage 3.

[0043] Here, the upper end sides of the front bag sheet 11 and the rear bag sheet 12 are not bonded, and are formed as openings la. The stored article M can be taken in and out of the sealing part 2 through the opening la. In this example, the closing means 4 is provided in the opening la, and the opening la can be closed in an airtight state. The closing means 4 in this example is provided with a convex portion on one side of the bag sheets 11 and 12 and a concave portion on the other side, and the opening 21 can be closed by fitting the convex portion and the concave portion together. However, the closing means 4 is not limited to this, and various structures can be used. Further, in some cases, without providing the closing means 4 as in the present example, after storing the stored article M in the sealing portion 2 through the opening la, the opening la is adhered by heat sealing or the like. In the case of the sealing bag 1 in which the sealing part 2 is used by filling the gas in the sealing part 2 through the air passage 3, the gas is passed without providing the opening la from the beginning. The portion that can be used may be limited to the air passage 3.

[0044] The ventilation path 3 is a ventilation space 3x that is a space through which air passes when the air present in the space in the sealing portion 2 is deaerated out of the bag after the stored article M is stored in the sealing portion 2, for example. This is the part where is formed.

The air passage 3 is formed by integrally bonding the bag side seal 14, the partition seal 15 and its extension line, and the bag sheets 11, 12 and the intermediate sheet 13. Left and right The section seal 15 is defined by a bottom seal 16 that defines the lower end of the compression bag 1 and its extension line, and is a lower part of the drawing than the partition seal 15 and its extension line. Here, in the case of this example, the partition seal 15 and the bottom seal 16 are formed substantially parallel to each other, and the upper and lower ends of the air passage 3 are defined by the pair of seals facing each other in the vertical direction. The

[0046] It should be noted that at least a part of the intermediate sheet 13 is coordinated to the air passage 3, and the illustrated upper edge of the intermediate sheet 13 and the partition seal 15 coincide with each other as in this example. However, it may be provided across the sealing portion 2. On the contrary, even if the upper end edge of the intermediate sheet 13 is located below the partition seal 15 and the upper end edge of the intermediate sheet 13 is left free in the air passage. good.

The illustrated lower end edge of the intermediate sheet 13 is the same as described above, and is positioned above the bottom seal 16, and the illustrated lower end edge of the intermediate sheet 13 is placed in a free state in the air passage. It may be.

[0048] In addition, for example, the partition seal 15 and the bottom seal 16 are arranged so as to be relatively tapered so that the air passage 3 has a divergent form, or the partition seal 15 is used in this example. In this way, a curved shape may be used instead of a straight shape.

[0049] Further, the bottom seal 16 is not provided in a portion where the sealing portion 2 and the air passage 3 communicate with each other. This portion is the outer communication portion 3b, and airflow can pass from the air passage 3 to the outside of the bag. Thus, ventilation can be performed from the inner communication portion 3a which is one end of the air passage 3 to the outer communication portion 3b which is the other end.

[0050] In this example, only one air passage 3 is provided for each compression bag 1. Two or more air passages 3 are provided for each compression bag 1. It may be provided. Further, in this example, as shown in FIG. 1, a force passage 3 is formed in the lower part of the sealing portion 2 so as to extend in the left-right direction. The positional relationship between the sealing portion 2 and the air passage 3 is as follows. For example, the air passage 3 may be formed so as to extend in the vertical direction with respect to any of the left and right forces of the sealing portion 2.

[0051] The ventilation space 3x is a space through which airflow passes in the ventilation path 3. The ventilation space 3x in this example is the space between the front bag sheet 11 and the intermediate sheet 13 and the rear bag sheet 12 during ventilation. Therefore, the ventilation space 3x exists side by side in the front-rear direction. The ventilation space 3x is closed when the bag sheets 11 and 12 and the intermediate sheet 13 come into close contact with each other. This is done by pressing each sheet in the front-rear direction by atmospheric pressure outside the bag.

Here, as shown in FIG. 1, a bypass seal 31 is formed in the air passage 3 of this example. The detour seal 31 is formed by adhering the above-mentioned sheets 11, 12, and 13 so as to cross a part of the air passage 3 in an oblique direction in the figure. It is provided separately for each side. Specifically, as shown in FIG. 1, each of the linear seals is formed so as to project from the partition seal 15 and the bottom seal 16 to the center of the air passage 3 at an angle of 45 °. Among them, the upper detour seal 31a is formed so as to be directed leftward as it goes to the tip (lower end 31al), and the lower detour seal 31b is formed so as to be directed toward the right as it goes toward the tip (upper end 31bl).

In the example shown in FIG. 1, the upper detour seal 3 la and the lower detour seal 3 lb are arranged in a parallel positional relationship. As shown in FIG. The lower bypass seal 3 lb is also formed so that the seal 31a goes to the right as it goes to the tip (bottom 31al), and the lower bypass seal 3lb also forms a force toward the right as it goes to the tip (upper 31bl). It may be arranged in a positional relationship where the detour seal 31b intersects. Further, as shown in FIG. 4, each of the detour seals 31 may be triangular.

[0054] At least three or more detour seals 31 are provided for each air passage 3, and one or more of each of the upper detour seal 31a and the lower detour seal 31b are provided. It is supposed to be. In this example, as shown in FIG. 1, four upper detour seals 31a and three lower detour seals 31b are alternately provided. From this, the airflow passing through the air passage 3 during degassing meanders between the detour seals 31 as indicated by arrows in the figure.

[0055] Here, the lower end 31al of each upper detour seal 31a and the upper end 31bl of each lower detour seal 31b are aligned in a straight line. In this example, the tips 31al and 31bl are aligned with the center line C in the vertical direction of the air passage 3.

[0056] As described above, the airflow passing through the ventilation path 3 during the deaeration snakes between the detour seals 31. In the air passage 3 in this example, the lower end 31al of each upper bypass seal 31a and the upper end 3lb 1 of each lower bypass seal 3lb are aligned in a straight line. Therefore, the lower end of each upper detour seal is conventionally positioned above the upper end of each lower detour seal, and the upper detour seal is arranged in a staggered manner. Compared to those that can be used, the meandering of the airflow can be made gentler. Therefore, the air passage 3 in the present invention can be quickly degassed and is superior to the conventional one.

[0057] As described above, the structure in which the seals are alternately provided in the air passage in this manner is a well-known structure. However, as described above, the present invention provides a lower end of each upper bypass seal 31a. The most characteristic feature is that the upper ends of the lower detour seals 31b are aligned in a straight line, and such a structure is a force that does not exist in the past.

[0058] As described above, by aligning the tips of the detour seals 31 in a straight line, the degassing can be quickly performed as described above, and a remarkable improvement in the check effect that has never been achieved has been achieved. Is. Please refer to the experimental results (Tables 1 and 2) described later.

[0059] The tip of each detour seal 31 is preferably perfectly aligned, but from the viewpoint of machining accuracy, the straight line to be originally formed (center line C in this example) is used as a reference. Thus, up to ± 10% in terms of the ratio to the inner dimension in the vertical direction of the air passage 3 is allowed. In this example, the vertical dimension of the air passage 3 is set to 35 mm, and the allowable value for this is ± 3.5 mm.

[0060] In addition, it is desirable that the straight line connecting the tips of the detour seals 31 coincides with the vertical center line C of the air passage 3, but this also has a deviation from the center line. A ratio up to ± 25% of the vertical dimension of airway 3 is allowed. In this example, the allowable value is ± 9mm. Further, in the present example, the distance between the bypass seals 31 in the left-right direction is 35 mm, which is equal to the inner dimension in the vertical direction of the air passage 3. For this, it is desirable that the range is ± 30% based on the vertical dimension of air passage 3 in the vertical direction. In this example, it is 35 ± 10 mm.

[0061] Further, it is desirable that the end face shapes of the lower end 31al of each upper detour seal 31a and the upper end 31bl of each lower detour seal 31b are the same as the straight line. This is because, as will be described later, the line connecting the end portions of the respective detour seals 31 functions like folding. However, each of the sheets 11, 12, 13 can be securely adhered between the tips of the detour seals 31. In this example, as shown in FIG. 1, the lower end 31al of each upper detour seal 3la and the upper end 31bl of each lower detour seal 31b are shaped so as to be scraped off by the center line C. Note that the shape of each end of the detour seal 31 may be a round shape or a pointed shape, but the function such as folding is relatively weak as described above. Therefore, the shape that can be expected to have the highest non-return action is a shape that matches the straight line.

[0062] As shown in FIG. 6, the tip of each detour seal 31 is bent along the left-right direction, and the shape force center line C of the side of the bent tip portion 33 is It may be a shape that matches. In this way, the length of the portion coinciding with the center line C can be made longer than that shown in FIG. 1, so that the function such as folding described above is more effectively performed. It can be demonstrated.

[0063] Further, in this example, the upper detour seal 31a and the lower detour seal 31b and the force that are arranged alternately one by one, the force is not limited to this, but the upper detour seal 31a or the lower detour seal Two or more seals 31b may be continuously arranged on the upper side or the lower side of the air passage 3.

[0064] In this example, the upper end of the upper bypass seal 31a is formed so as to overlap with the partition seal 15 without any gap, and the lower end of the lower bypass seal 3 lb is formed so as to overlap with the bottom seal 16 without any gap. However, the present invention is not limited to this, and there may be a gap between each bypass seal 31 and the partition seal 15 or the bottom seal 16! /.

[0065] Further, in this example, the force that forms the detour seal 31 with respect to the partition seal 15 and the bottom seal 16 at an angle of 45 ° is not limited to this, and can be implemented at various angles. . Further, in this example, the detour seal 31 is formed as a linear seal, but it may be formed in a curved shape so as to follow the air flow in the air passage 3 or may be formed in a trapezoidal shape or the like. good.

Here, as shown in FIG. 4, the case where the detour seal 31 has a triangular shape will be described. In FIG. 4 (A), the detour seal 31 has an isosceles triangle shape, the bottom of the shape is in contact with the partition seal 15 and the bottom seal 16, and The apex is the tip 31al, 31bl, which is aligned with the center line C. The force shown in Fig. 4 (B) is the same force as the above-mentioned detour seal 31 in the shape of an isosceles triangle. Contrary to the above, the top of the isosceles triangle is divided into the partition seal 15 and the bottom seal 16. The bottom part is the tip 31al, 31bl with the center line C.

In addition, in the case shown in FIG. 4 (B), the force that the balance seal 32 that is a circular seal is formed in the air passage 3 in addition to the detour seal 31. This is to prevent the sheets 11, 12, and 13 in the part of the sheet from being distorted by the influence of heat when the bypass seal 31 is formed. It is effective when there are few compared. In order to prevent this distortion, in addition to the formation of the balance seal 32, another linear seal is provided in the sealing portion 2 or the air passage 3 in parallel with the partition seal 15.

[0068] The detour seal 31 in this example is one in which the entire triangular shape is heat-sealed. 1S Not limited to this, only the triangular contour may be heat-sealed. In this example, an isosceles triangle is used, but a right triangle or an unequal triangle may be used. In addition, the shape of the top is not limited to a square shape as long as it matches the center line c, and may be a rounded or chamfered shape.

[0069] The effect of the detour seal 31 that brings about the morphological force is only a hypothesis, but each sheet 11, 12, 13 in the air passage 3 is in a state where the sealed portion 2 is evacuated. The line connecting the ends of the detour seal 31 (in this example, coincides with the center line C) functions like a fold, and the sheets 11, 12, and 13 are curved. This is thought to be because it is difficult for moths to lean.

[0070] Specifically, in the air passage 3 having the shape shown in Fig. 1, the airflow to flow back is a force that tries to pass between a pair of the upper bypass seal 31a and the lower bypass seal 31b. Each of the sheets 11, 12, 13 is curved between the upper and lower bypassed seat 31a and the lower bypassed seat 31b, and the airflow is blocked here.

[0071] Conventionally, in the case where the detour seals are simply formed alternately, the line connecting the end portions of the detour seal is not straight in the left-right direction, and is zigzag. The airflow that tries to flow backward passes through the kite where the kite easily approaches the seats 11, 12, and 13 It is presumed that the non-return action is reduced by this and that it is not!

Next, as shown in FIG. 7, the intermediate sheet 13 will be described with reference to a case where one sheet is folded and formed.

In this case, each of the space between the front bag sheet 11 and the front piece 13a and the space between the rear bag sheet 12 and the rear piece 13b can be vented and blocked, as shown in FIG. As shown in Fig. 3, a ventilation space 3x is formed during ventilation. At the time of blocking, as shown in FIG. 8 (D), the front bag sheet 11 and the front side piece are entirely formed between the inner communication portion 3a and the outer communication portion 3b (hereinafter referred to as the cross flow portion 3c) in the air passage. 13a and the rear bag sheet 12 and the rear piece 13b are in close contact with each other.

It should be noted that the structure itself in which the air passage 3 is blocked by the close contact between the bag sheets 11 and 12 and the intermediate sheet 13 has conventionally existed as described in Patent Document 1. However, in this example, unlike the conventional bag of the same type as described in Patent Document 1, between the front piece 13a and the rear piece 13b of the intermediate sheet 13, the inner communication portion 3a and the outer portion Force open to any one of the communicating portions 3b A feature is that a dead-end space 3y is formed in which ventilation between the communicating portions 3a and 3b is impossible. Hereinafter, in the intermediate sheet 13 of this example, the surface facing the bag sheets 11 and 12 is referred to as a contact surface 13d, and the surface on the side where the front piece 13a and the rear piece 13b are opposed is referred to as a separating surface 13e. explain.

[0075] The front piece 13a is the center of the intermediate sheet 13 and is the upper part of the figure in FIG. 7 with the fold part 13c along the longitudinal direction of the intermediate sheet 13 interposed therebetween. The rear piece 13b This is the lower part of the figure. Then, a part of the fold portion 13c is coordinated to the inner communication portion 3a in the same manner as the example shown in FIG.

[0076] In this example, the intermediate sheet 13 is composed of a single folded sheet, but a plurality of sheets are overlapped, and, for example, a front side piece is formed at a portion corresponding to the fold portion 13c. It is good also as what adhered 13a and back piece 13b. However, a dead-end space 3y can be formed more easily if it is made of a folded sheet. Therefore, it can contribute to the reduction of the manufacturing cost of the compression bag 1.

[0077] In the intermediate sheet 13 in this example, the fold portion 13c, which is the upper side, is integrated with the bag sheets 11 and 12 by the partition seal 15 except for the inner communication portion 3a. , The bottom side is integrated with the bottom seal 16 except for the outer communication part 3b. The left and right sides are integrated with a side seal 14. Here, in this example, the fold portion 13c is provided at the full width in the left-right direction of the intermediate sheet 13. The fold portion 13c is actually exposed because of the provision of the partition seal 15. There is no inner communication part 3a only. Therefore, the fold portion 13c is not formed except for the portion coordinated with the inner communication portion 3a, and the front piece 13a and the rear piece 13b are separated and integrated with the partition seal 15. It may be a thing.

[0078] Note that the upper detour seal 3la and the lower detour seal 3 lb formed in the air passage 3 are between the front bag sheet 11 and the front piece 13a and between the rear bag sheet 12 and the rear piece 13b. It is desirable that it is formed only between each of the front side piece 13a and the rear side piece 13b (in FIG. 8B, the state where the detour seal 31 is formed is shown. Shown). For this reason, in the intermediate sheet 13, it is preferable that the separation surface 13e, which is a surface on the side where the front piece 13a and the rear piece 13b face each other in the folded state, does not have heat sealability.

[0079] However, when the separation surface 13e is not heat-sealable, as shown by the solid line in FIG. 7, the lower side of each bag sheet 11, 12 and the lower end of the intermediate sheet 13 are used. When the sides are matched, the separating surfaces 13e of the intermediate sheet 13 are not heat-sealed, and the lower end of the compression bag 1 remains open. In order to prevent such a situation, as shown by a broken line in FIG. 7, the lower end side of the intermediate sheet 13 is closer to the inner side of the compression bag 1 than the lower end side of each bag sheet 11, 12 ( It is desirable that the bag sheets 11 and 12 be directly heat-sealed at the lower end of the compressed bag 1.

[0080] The examples shown in Figs. 7 and 8 are for the compression bag 1 that is used after the sealing part 2 is deaerated, and the inner communication part 3a that is the upstream side of the air flow at the time of deaeration. On the other hand, when the sealing part 2 is filled with gas, the direction of the airflow is reversed. A part of 13c is coordinated to the outside communication part 3b opposite to the above.

[0081] It should be noted that the fold portion 13c of the intermediate sheet 13 and the position where the partition seal 15 is formed are not necessarily limited. The crease part 13c and the partition seal 15 that are not necessarily coincided with each other are separated from each other, and the crease part 13c that is the upper edge of the intermediate sheet 13 is left free in the air passage. It may be. However, for example, when the crease portion 13c is provided below the section seal 15 in FIG. 1, part of the check action of the air passage 3 is caused by the front bag sheet 11 and the rear bag sheet 12. It will be borne by the close contact. Conversely, when the fold portion 13c is provided above the section seal 15 in FIG. 1, the excess portion of the intermediate sheet 13 above the section seal 15 obstructs the air flow in the inner communication section 3a. there's a possibility that. Therefore, as shown in this example, it is desirable that the fold portion 13c and the partition seal 15 are matched.

[0082] Next, the dead-end space 3y will be described. As shown in FIG. 8 (B), this dead end space 3y is defined by each of the partition seal 15, the crease portion 13c, the side seal 14, and the bottom seal 16, and the opening portion is the outer communication portion. This is the space only between the front piece 13a and the rear piece 13b in 3b.

That is, in the compression bag 1 of this example, the inner side communication portion 3a on the upstream side with respect to the airflow direction at the time of deaeration in the air passage 3 is connected to the front side piece 13a and the rear side of the intermediate sheet 13. The dead end space 3y is closed by the side piece 13b and the crease 13c. In addition, the dead end space 3y is opened by separating the front piece 13a and the rear piece 13b in the outer communication portion 3b on the downstream side.

[0084] As described below, the dead-end space 3y reinforces the check action of the air passage 3 by the air entering the air passage 3 from the outer communication portion 3b stagnating in the cross-flow portion 3c. Therefore, the present invention can be implemented in a form other than this example as long as it forms a space where air can stay. For example, the front piece 13a and the rear piece 13b are bonded to each other in the middle portion in the left-right direction in FIG. 8 (B) of the air passage 3, and the outer side of the bonded portion formed in this way. A space between the front piece 13a and the rear piece 13b existing near the communication part 3b may be a dead end space 3y.

Here, in the inner communication portion 3a in this example, the presence of the fold portion 13c in the intermediate sheet 13 closes the space between the front piece 13a and the rear piece 13b. Therefore, as shown in FIG. 8 (A), the air flow F1 in the direction to flow out of the bag from the sealing portion 2 during deaeration does not enter between the front piece 13a and the rear piece 13b. Front bag sheet 11 and front piece 13a And between the rear bag sheet 12 and the rear piece 13b. Then, as shown in FIG. 8 (C), the space between the front bag sheet 11 and the front side piece 13a of the intermediate sheet 13 and the space between the rear bag sheet 12 and the rear side piece 13b of the intermediate sheet 13 are expanded. Then, the air flows through the ventilation space 3x (Note that FIG. 8C is drawn exaggerating the vertical direction in the figure).

[0086] On the other hand, after the deaeration is completed as described above, the air is blocked by the aerodynamic air flow path 3 that causes the air flow path 3 to flow backward from the outside of the bag. Specifically, as shown in FIG. 8 (D), the front bag sheet 11 and the close contact surface 13d on the front piece 13a side, and the close contact surface 13d on the rear bag sheet 12 and the rear piece 13b side are in close contact with each other. This is done by closing the ventilation space 3x (FIG. 8 (D) is exaggerated in the vertical direction of the drawing).

[0087] When the ventilation space 3x is closed, the close contact of each of the sheets 11, 12, 13 is reduced in the inside of the sealing part 2 in accordance with deaeration in the case of the compression bag 1 as in this example. To be in a state. In other words, there is a pressure difference between the outside of the bag (positive pressure) and the inside of the sealing portion 2 (negative pressure), and from this pressure difference, the intermediate sheet 13 moves toward the sealing portion 2 side on the negative pressure side. The attracting force attracted works. Since the intermediate sheet 13 is made of flexible resin, it is easily deformed by the suction force described above, and the front bag sheet 11 and the front piece 13a side contact surface 13d, and the rear bag sheet 12 and the rear piece. The close contact surfaces 13d on the 13b side are in close contact with each other. At the same time, as shown in FIG. 8 (B), the outside air enters the dead end space 3y in the form of a dead end as an air flow F2 and stagnates. By the air stagnating in the dead end space 3y, the front piece 13a of the intermediate sheet 13 is pressed against the front bag sheet 11, and the rear piece 13b is pressed against the rear bag sheet 12. As a result, the close contact between each of the bag sheets 11 and 12 and the intermediate sheet 13 is made stronger than the conventional check valve disclosed in Patent Document 1, and a strong check action can be obtained. Therefore, a situation in which the airflow F2 in the reverse direction continues to flow back to the sealing portion 2 without the ventilation space 3x being closed cannot occur, and the ventilation space 3x is reliably closed.

[0088] Contrary to this example, in the case of the sealing bag 1 in which the sealing portion 2 is filled with gas, contrary to the above, the pressure inside the sealing bag 2 is higher than that outside the bag. There is a pressure difference opposite to the above, but due to this pressure difference, the front bag sheet 11 and the front piece 13a side contact surface 13d, and the rear bag sheet 12 and the rear side Each of the contact surfaces 13d on the side of the piece 13b is in close contact, and at the same time, the gas filled in the sealing portion 2 flows back to the outside of the bag. Since it always enters the dead end space 3y and stagnates, the ventilation space 3x is surely closed.

[0089] Next, in the front side piece 13a and the rear side piece 13b of the intermediate sheet 13, the separation surface 13e on the opposite side to the contact surface 13d has a characteristic that the contact surface 13d is less likely to adhere. Thus, the front piece 13a and the rear piece 13b may be easily separated. For example, among the plurality of resin films constituting the intermediate sheet 13, the resin film constituting the separating surface 13 e may be a material having a lower adhesion than the other resin films, or the separating surface 13 e may be It is possible to form irregularities by finishing the satin finish, or to apply paint for improving the peelability to the separating surface 13e.

[0090] In the present invention, the bypass seal 31 is formed in the air passage 3. However, in order to make the dead end space 3y function more effectively, as described above, In view of the above, it is desirable for 13e to have no heat-sealing properties, and to allow outside air to stop and easily enter space 3y.

[0091] Next, a method for manufacturing the compression bag 1 of this example will be described. In the production of the compressed bag 1 of this example, the above-described bag sheets 11 and 12 and the valve body sheet 13 are made of flexible sheets that are continuous in the longitudinal direction, and are used in each process. The heat seal is cut and processed sequentially.

First, the closing member 4 is attached by heat sealing to the upper end portion of the front bag sheet 11 and the rear bag sheet 12, which are the portions that become the opening la of the compression bag 1 after completion. In this example, the closing member 4 is a chuck in which a convex portion is arranged on one side of the bag sheets 11 and 12, and a concave portion is arranged on the other side. Similarly, it is supplied to each process continuously in the longitudinal direction.

[0093] Simultaneously with the attachment of the closing member 4, the intermediate sheet 13 is overlapped so as to be sandwiched between the front bag sheet 11 and the rear bag sheet 12. The intermediate sheet 13 is smaller in width than the bag sheets 11 and 12, and is overlapped with a portion of the bag sheets 11 and 12 where the air passage 3 is to be formed.

[0094] Then, the sheets 11, 12, 13 in the above-mentioned state are heat-sealed, and the bag side seal 14, the partition seal 15, the bottom seal 16, and the detour seal 31 are formed and contacted each time. Worn. This adhesion is achieved by pressing the heated mold against each of the sheets 11, 12, and 13. In forming each of the seals 14, 15, 16, 31, the heat of the heat seal and the mold for performing the heat seal are formed in at least a part of the portion of the air passage 3 where the ventilation space 3x is formed. Since the pressure is assumed to be no force, the formation of the air passage 3 is not adversely affected, and the air passage 3x can be formed quickly when the compressed bag 1 is deaerated. .

Then, each of the sheets 11, 1 2, 31, and the closing means 4 is cut in the vertical direction in the figure so as to divide the bag side seal 14 into two equal parts, whereby the compression bag 1 is completed. In the manufacturing method of the compression bag 1 according to the present invention, the sheets 11, 12, 13 and the closing means 4 which are continuous in the longitudinal direction are used and continuously supplied to each process, and heat sealing and cutting are performed. Since the compression bags 1 are formed one after another by the sequential processing, the manufacturing is relatively easy, and the manufacturing cost can be reduced.

[0096] Next, the inventor of the present application conducted an experiment demonstrating the effect of the compression bag 1 of the present example, and this will be described. As a specimen, three sets of three types of compression bags with a horizontal dimension of 260 mm X a vertical dimension of 380 mm, a horizontal dimension of 350 mm X a vertical dimension of 500 mm, and a horizontal dimension of 400 mm X a vertical dimension of 500 mm were manufactured. In each set, the tip of the detour seal 31 matches (A type), exceeds 3 mm (B type), and exceeds 6 mm with reference to the center line C of the air passage 3 Three kinds of things (C type) were produced and tested for each. The formation interval of the detour seal was 35 mm. Further, the non-volatile liquid 5 is not coordinated in the air passage 3.

[0097] The experiment was carried out using a single sponge with a thickness of 5 cm as the storage M, placing this sponge in the sealed part 2, closing the chuck 4, and then opening the space from the air passage 3 to the sealed part 2. And the air contained in the sponge was pushed out by hand to make it deaerated. Then, at regular intervals, whether the deaerated state was maintained was visually observed and evaluated in five stages. The results are shown in Table 1.

[0098] [Table 1] B type (Top / bottom seal tip misalignment, 3mm from center line)

C type (Top / bottom seal tip misalignment, center line force, etc. 6mm)

π π Π P Not great

Strange or good

Bad

Good

'

From the above experimental results, it was confirmed that the bag-type and bag-type compression bags can be used. In addition, the C type can be said to be equivalent to the conventional type in which only alternating seals are provided. Compared to this, the type C and type 含ま included in the scope of the present invention are compared. It was actually confirmed that the type of compression bag improved the check effect.

[0100] In addition, the inventor of the present application obtained an implementation product of the compression bag 101 according to the invention described in Patent Document 1.

An experiment similar to the above was performed, and this is also described.

[0101] The compression bag 101 has the structure shown in FIG. 9 and has two sizes, a large bag with a horizontal dimension of 460 mm x vertical dimension of 570 mm, and a small bag with a horizontal dimension of 350 mm x vertical dimension of 500 mm. is there. The width of each air passage is 30mm.

[0102] When the experiment was conducted in the same manner as described above, the evaluation was the same as that described in Table 1 for the large-sized bag, and the result was △ after 3 hours and X after 6 hours. In the case of a small bag, the result was ○ after 3 hours, △ after 6 hours, and X after 12 hours. Therefore, although it is a comparison on the basis of an actual product, it can be inferred that the compression bag according to the present invention has a higher check effect than the compression bag 101 according to Patent Document 1.

[0103] Subsequently, as shown in Fig. 4 (A) and (B), the inventor's ability of the present application is attached to the compression bag 1 in which each of the detour seals 31 is formed in a triangular shape, and the dimension between the seals on the center line C. The experiment was conducted using specimens with different W, and this will also be explained. As specimens, four types of compression bags were manufactured with a horizontal dimension of 300 mm X vertical dimension of 450 mm, horizontal dimension of 350 mm X vertical dimension of 500 mm, horizontal dimension of 400 mm X vertical dimension of 500 mm, horizontal dimension of 480 mm and vertical dimension of 500 mm. As for the detour seal 31, the one shown in FIG. 4 (A) and the one shown in FIG. 4 (B) were each changed with the inter-seal dimension W changed by 5 mm as shown in Table 2. As for the width dimension of the air passage 3, the dimension (inner dimension) between the partition seal 15 and the bottom seal 16 is about 35 mm. In addition, the non-volatile liquid 5 should be placed in the air passage 3 in the S position.

[0104] The content of the experiment is the same as that of the above-mentioned experiment. A single sponge having a thickness of 5 cm is used as the storage M, and this sponge is put in the sealing part 2 and the chuck 4 is closed. The air contained in the sponge 2 and the sponge was pushed out by hand to obtain a deaerated state. Then, at regular intervals, whether or not the deaerated state was maintained was visually observed and evaluated in five stages. The results are shown in Table 2.

[0105] [Table 2] ○ △ X

π π Π P

Not great

Review

[0106] From the above experimental results, as shown in FIGS. 4 (A) and 4 (B), the compression bag 1 in which each of the bypass seals 31 is formed in a triangular shape can withstand sufficient use and has an excellent check effect. It was confirmed that it has

[0107] However, as can be understood from the results of this experiment, when the inter-seal dimension W increases, the check effect tends to weaken. And if the inter-seal dimension W is small, the deaeration resistance will increase. Therefore, from this experimental result, as shown in FIGS. 4 (A) and 4 (B), in the compression bag 1 in which each of the detour seals 31 is formed in a triangular shape, the range of the inter-seal dimension W that can be used satisfactorily is It was confirmed that the thickness was 10 to 25 mm, more desirably 20 to 25 mm.

The present invention has the following excellent effects. [0109] In the inventions according to claims 1 to 3 of the present application, of the detour seal 31, the tip 31al of the one-side detour seal 31a provided near the one-side vent path side seal 15 and the other The air vent side seal on the side 16 is arranged in line with the tip 31bl of the other side bypass seal 31b and 1S in a straight line. It is possible to provide a sealed bag in which the improvement of the check effect can be achieved.

[0110] In addition, in the inventions according to claims 4 to 6 of the present application, in addition to the above-described effects, a portion of each of the sheets 11, 12, and 13 that is provided with the ventilation path 3, Providing a sealed bag with improved non-return action in combination with the formation of the detour seal 31 by applying weak adhesion to at least a part of the surface facing the other sheet It was made.

[0111] In addition, in the invention described in claim 7 of the present application, in addition to the effect of the invention described in claim 3, the three sheets 11, 12, and 13 have the composition of the resin and the sheet thickness. Since the sheets having the same thickness are used, the shrinkage rates of the sheets can be made to coincide with each other. When each bag is cut after being applied, the difference in contraction rate between the sheets causes the sheet in the air passage 3 to be distorted after the cutting, thereby reducing the check effect. The sealing bag which reduced possibility was able to be provided.

[0112] Further, in the invention according to Claim 8 to LO of the present application, in addition to the effect of the invention according to Claim 3, the front side piece in which the intermediate sheet 13 is overlapped at least in the front-rear direction. 13a and a rear piece 13b, between the front bag sheet 11 arranged on the front side and the front piece 13a, and on the rear bag sheet 12 arranged on the rear side and the rear side Air can flow between the piece 13b, and the dead space 3y exists between the front piece 13a and the rear piece 13b. As a result of the pressure of the air, the sheets 11, 12, 13 are more closely adhered to each other than before, and a sealed bag capable of providing a strong check effect can be provided. is there.

Claims

The scope of the claims

A flexible resin sheet is used, and the sealing part (2) can be sealed in an airtight state, and the gas present in this sealing part (2) can be kept discharged outside the bag. Alternatively, the sealing portion (2) can be kept in a state filled with gas, and the ventilation portion for connecting the sealing portion (2) and the outside of the bag so as to allow ventilation and closing. In the sealing bag (1) provided adjacent to the sealing portion (2), the path (3)

The air passage (3) has an inner communication part (3a) that communicates with the sealing part (2) and an outer communication part (3b) that communicates with the outside of the bag,

The bag sheets (11, 12) are overlapped and bonded to each other, so that at least a pair of air passage side seals (15, 16) are formed.

Of the air passage side seals (15, 16), the sealing portion (2) and the air passage (3) are partitioned by one side (15), and the inner communication portion (3a) is a portion between the sealing portion (2) and the air passage (3), where the one air passage side seal (15) is not present,

The air passage (3) and the outside of the bag are separated by at least the other side (16) of the air passage side seals (15, 16), and the outer communication portion (3b) A part of the portion between the air passage (3) and the outside of the bag where the other air passage side portion seal (16) is not present,

A detour seal (31) is provided so as to cross a part of the air passage (3). The detour seal (31) includes the bag sheets (11, 12) and the bags. The sheet (11, 12) is formed by overlapping and adhering to the sheet facing the sheet,

The detour seal (31) is provided near the air passage side seals (15, 16) in the air passage (3),

There are at least three or more detour seals (31), and one of the detour seals (3 la) provided near the one-side vent passage side seal (15) and the other vent. One or more detour seals (31b) provided near the road side seal (16) are each provided, A seal characterized in that the tip (31al) of each one-side bypass seal (31a) and the tip (31bl) of each other-side bypass seal (31b) are aligned in a straight line. bag.

[2] Consists of two opposing sheets (11, 12)

It is possible to vent between each of the above seats (11, 12),

The pair of air passage side seals (15, 16) in the above-mentioned opposing relationship are in a substantially parallel relationship,

The end surface shape of the tip (31al) of each one-side detour seal (31a) and the tip (31bl) of each other-side detour seal is the same shape as the straight line (C). The sealed bag according to claim 1, wherein the bag is characterized.

[3] Consists of three opposing sheets (11, 12, 13)

It is possible to vent between each of the above seats (11, 12, 13),

[4] Of each of the above-mentioned sheets (11, 12, 13), the portion provided with the above-mentioned air passage (3)

4. The sealed bag according to claim 2 or 3, wherein at least a part of the surface that faces the other sheet is provided with weak adhesiveness.

[5] The weak adhesive force is provided by a non-volatile liquid (5) coordinated to at least the surface of any one of the sheets (11, 12, 13). The sealed bag according to claim 4.

[6] The detour seal (31) force is a triangular shape provided so as to protrude from the air passage side seals (15, 16) into the air passage (3),

The one side detour seal (31a) adjacent to each other in the air passage (3) protrudes from one air passage side seal (15) and the other side detour seal (31b) , Projecting from each air passage side seal (16) on the other side,

The vertices (31al, 31bl) of the detour seals (31) each having a triangular shape are aligned on a straight line. Is coordinated with

6. The sealed bag according to claim 5, wherein silicon oil is used as the non-volatile liquid (5).

[7] The sealed bag according to claim 3, wherein the three sheets (11, 12, 13) are sheets having the same constitution and thickness of the resin.

[8] The intermediate sheet (13) includes at least a front piece (13a) and a rear piece (13b) overlapped in the front-rear direction,

Between the front bag sheet (11) arranged on the front side and the front piece (13a), and the rear bag sheet (12) arranged on the rear side and the rear piece (13b) It is possible to ventilate between

A dead end space (3y) exists between the front piece (13a) and the rear piece (13b).

This dead end space (3y) is located on one end side of the intermediate sheet (13) with respect to the airflow direction in the air passage (3) as a reference, and the front piece (13a). It is closed by integrating the rear piece (13b)

The hermetic seal according to claim 3, wherein the other end side is opened by separating the front piece (13a) and the rear piece (13b). bag.

[9] The intermediate sheet (13) is formed by folding one sheet,

Of the intermediate sheet (13), weak adhesion is imparted to the contact surface (13d) which is the surface that is in close contact with each of the bag sheets (11, 12).

The sealed bag according to claim 8, wherein the separating surface (13e), which is a surface on the side where the intermediate sheets (13) face each other, does not have heat sealing properties.

[10] It is characterized in that the end side of the intermediate sheet (13) is positioned closer to the inner side of the sealing bag (1) than the end side of each of the bag sheets (11, 12). The sealed bag according to claim 9.