JP7113552B1 - film assembly - Google Patents

Abstract

Kind Code: A1 A film assembly is provided that has a flow path that facilitates the outflow of fluid. An expandable and contractible film assembly (100) has overlapping film portions (110). The film portion 110 has a space portion 120 capable of storing fluid, and a channel 130 that fluidly communicates the inside and the outside of the space portion 120 . The channel 130 is provided at the end of the film portion 110 . [Selection drawing] Fig. 1

Description

The present invention relates to film assemblies.

A film molded article formed by heat-sealing a synthetic resin film made of a thermoplastic resin is known. Patent Documents 1 to 3 disclose a film molded body that becomes a film balloon by storing a fluid such as gas or liquid inside.

US Pat. No. 6,200,000 discloses a balloon having a specially designed gas delivery valve that also acts as a check valve. Patent Literature 2 discloses a balloon body made of a synthetic resin film in which an airway having a check valve function is formed without using a check valve that is separate from the resin film.

WO2017/043519 JP 2012-148780 A

In the film molded product described in Patent Document 2, it may be difficult for fluid to escape from the respiratory tract, which functions as a check valve.

Therefore, a film assembly having a flow path through which fluid can easily flow out, and an article including the same are desired.

An expandable and contractible film assembly according to one aspect has film portions that overlap each other. The film portion has a space capable of storing a fluid, and a channel that fluidly communicates the inside and the outside of the space. The flow path is provided at the end of the film portion.

According to the above aspect, there is provided a film assembly having a channel that allows fluid to flow out easily.

1 is a perspective view of a film assembly according to a first embodiment; FIG. 1 is a front view of a film assembly according to a first embodiment; FIG. It is a top view of a film assembly concerning a 1st embodiment. 4 is a rear view of the film assembly according to the first embodiment; FIG. It is a right view of the film assembly which concerns on 1st Embodiment. Fig. 2 is a left side view of the film assembly according to the first embodiment; It is a bottom view of a film assembly concerning a 1st embodiment. FIG. 3 is a schematic diagram showing structures of a space, a flow path, a welding part, and a welding line of the film assembly according to the first embodiment; 1 is an exploded view of a film assembly according to a first embodiment; FIG. 2 is an enlarged perspective view of the vicinity of area 10A in FIG. 1; FIG. FIG. 5 is a perspective view of a film assembly according to a second embodiment; FIG. 10 is a perspective view of a base for erecting the film assembly according to the second embodiment; FIG. 8 is a schematic diagram showing an example of the structure of the space, flow path, welding part, and welding line of the film assembly according to the second embodiment. FIG. 10 is a schematic diagram showing structures of a space, a flow path, a welded portion, and a welded line of a film assembly according to a third embodiment; FIG. 10 is a schematic diagram showing the structures of the space, the flow path, the welding part, and the welding line of the film assembly according to the fourth embodiment; FIG. 11 is a schematic diagram showing the structure of the space, flow path, welded portion, and welded line of the film assembly according to the fifth embodiment. FIG. 11 is a schematic diagram showing the structures of the space, the flow path, and the welded portion of the film assembly according to the sixth embodiment; FIG. 12 is a schematic diagram showing the structures of the space, the flow path, and the welded portion of the film assembly according to the seventh embodiment; FIG. 14 is a schematic diagram showing the structures of the space, the flow path, and the welded portion of the film assembly according to the eighth embodiment; FIG. 14 is a schematic diagram showing the structures of the space, the flow path and the welded portion of the film assembly according to the ninth embodiment. FIG. 14 is a schematic diagram showing the structures of the space, the flow path, and the welded portion of the film assembly according to the tenth embodiment; FIG. 21 is a schematic diagram showing the structures of a space, a flow path, and a welded portion of a film assembly according to an eleventh embodiment; FIG. 20 is a schematic diagram showing the structures of the space, flow path, and welded portion of the film assembly according to the twelfth embodiment; FIG. 20 is a schematic diagram showing the structures of the space, the flow path and the welded portion of the film assembly according to the thirteenth embodiment;

Embodiments will be described below with reference to the drawings. In the following drawings, the same or similar parts are given the same or similar reference numerals. However, it should be noted that the drawings are schematic, and the ratio of each dimension may differ from the actual one.

[First embodiment]
FIG. 1 is a perspective view of a film assembly according to the first embodiment. FIG. FIG. 2 is a front view of the film assembly according to the first embodiment. FIG. 3 is a top view of the film assembly according to the first embodiment. FIG. 4 is a rear view of the film assembly according to the first embodiment. FIG. 5 is a right side view of the film assembly according to the first embodiment. 6 is a left side view of the film assembly according to the first embodiment. FIG. FIG. 7 is a bottom view of the film assembly according to the first embodiment. FIG. 8 is a schematic diagram showing the structures of the space, the flow path, the welding part, and the welding line of the film assembly according to the first embodiment. FIG. 9 is an exploded view of the film assembly according to the first embodiment. FIG. 10 is an enlarged perspective view of the vicinity of area 10A in FIG.

A film assembly 100 according to the first embodiment is a partition that divides a space. The partition is not particularly limited, but may be, for example, one that partitions an indoor or outdoor space, or one that partitions a part of a desk. A partition may, for example, divide a person's personal space.

The film assembly 100 has a film portion 110 that includes films stacked on top of each other. The material forming the film portion 110 may be, for example, a thermoplastic synthetic resin film. The material forming the film portion 110 may be, for example, polyethylene resin, polypropylene resin, vinyl chloride resin, or the like.

The film portion may be configured by stacking two films, or may be configured by stacking one film by folding.

The film portion 110 has a space portion 120 capable of storing gas, and a channel 130 that fluidly communicates between the inside and the outside of the space portion 120 . One of the channels 130 may be open to the outside of the film portion 110 , and the other of the channels 130 may communicate with the space 120 . The space 120 and the flow path 130 are formed between the films that overlap each other. Specifically, the shape of the space 120 and the flow path 130 may be formed by a heat-sealed portion obtained by heat-sealing overlapping films.

In the first embodiment, the upper side of the film portion 110 corresponds to the folding line F of the film portion. That is, the upper side of the film portion 110 corresponds to a line formed by folding the film. Note that "upper side" is a term used in the drawings to be positioned upwardly and does not necessarily mean directed upwards in the direction of gravity during use of the film assembly. want to be

The side edges of the film portion excluding the upper edge of the film portion 110 and the inlet portion of the flow path 130 may have welded portions 140 that are heat-sealed. As a result, the space 120 is surrounded by the heat welded portion 140 and the bending line F except for the flow path 130 . As a result, the gas that has flowed into the space 120 does not substantially flow out from anywhere other than the flow path 130 .

Instead of the illustrated embodiment, the folding line F of the film portion may be located at a location other than the upper edge of the film portion 110. FIG. Also, the folding lines F may be positioned on a plurality of sides of the film portion 110 . For example, the fold lines F may be located on both the top and bottom sides of the film portion. In this case, both sides of the film portion 110 may be the heat-sealed portions 140 . Such a film portion 110 can be produced by forming heat-sealed portions 140 on two sides of a cylindrical film.

The flow path 130 is used to allow gas to flow into the space 120 and/or to flow gas out of the space 120 . The partition can be expanded by allowing gas to flow into the space 120 from the outside through the flow path 130 . In addition, the partition can be contracted by causing the gas to flow out of the space 120 through the channel 130 .

Channel 130 may have gas inlets and/or outlets 135 . The inlet and/or outlet 135 may be, for example, a cut line placed in one of the overlaid films. When the flow path 130 functions as a check valve as described later, if the inflow port and/or the outflow port 135 are cut lines, the spontaneous outflow of gas can be further suppressed.

The inlet and/or outlet 135 are not limited to the above-described cutting line, and may be a cut opening obtained by partially removing one of the films that overlap each other.

The film assembly 100 preferably has at least one weld line L that divides the void 120 into a plurality of compartments 122 that are in fluid communication with each other. That is, the film assembly 100 may have multiple compartments 122 capable of storing gas. In this case, adjacent compartments 122 may be in fluid communication.

In the first embodiment, a plurality of partitions 122 are arranged side by side in one direction. Each section 122 is generally surrounded by bending lines F and welding lines L, and is configured to be able to store gas.

The weld lines L that separate the adjacent sections 122 need not completely separate the adjacent sections 122 . That is, the film assembly 100 may have communication portions 150 that fluidly connect the sections 122 adjacent to each other. The communicating portion 150 may be configured by a portion of the film portion 110 that is not welded. The communication portion 150 provides fluid communication between adjacent compartments 122 .

In the first embodiment, each section 122 extends in the vertical direction (vertical direction on the paper surface of FIG. 8). In other words, the welding lines L separating the sections 122 extend along the longitudinal direction. Thereby, the partition as the film assembly 100 is configured to be arbitrarily bent at the welding line L along the longitudinal direction.

In FIG. 1, the partition is bent at two weld lines L and is formed in a substantially U-shape in top view. Not limited to this, the partition may be arbitrarily bent at the weld line L. Alternatively, the partition may not be bent at the weld line L if it can stand on its own.

The lower limit of the length L1 of the communicating portion 150 in the vertical direction may be, for example, a length that allows gas to smoothly move between the sections 122 adjacent to each other. The length of the communicating portion 150 in the longitudinal direction may be, for example, 3 mm or longer, preferably 5 mm or longer, and more preferably 8 mm or longer. Note that the length L1 may be a length measured when the space 120 contains no gas.

The upper limit of the length L1 of the communicating portion 150 in the vertical direction may be determined, for example, by considering that the partition can be folded at the welding line L. The length of the communicating portion 150 in the longitudinal direction may be, for example, 50 mm or less, preferably 40 mm or less, and more preferably 30 mm or less.

The channel 130 may be provided at the end of the film portion 110 . The end portion of the film portion 110 is not limited to one point at the extreme end of the film portion 110 , but means a region of the film portion 110 closest to the extreme end. By providing the flow path 130 at the end of the film portion 110, the shape of the flow path 130 is easily stabilized, and there is an advantage that the air in the space portion 120 is easily discharged.

Specifically, when the space 120 is inflated with gas, the flow path 130 is distorted by the pressure of the gas and the distortion of the film, so the gas in the space 120 is difficult to flow out through the flow path 130. Become. When the flow path 130 exists at the end of the film portion 110 , the flow path 130 can be easily straightened simply by slightly stretching the film portion 110 by hand.

Flow path 130 is preferably formed between bending line F of film portion 110 and welded portion 160 of film portion 110 . In this case, the welded portion 160 may be formed along the folding line F of the film portion 110 . As a result, the channel 130 is formed by a film cylindrically surrounded by one welded portion 160 . In this case, the shape of the flow path 130 is more likely to be stable, so that a flow path that facilitates inflow and/or outflow of gas is easily formed.

In the first embodiment, the flow path 130 is formed between the folding line F of the film portion 110 and the welded portion 160 parallel to the folding line F. As shown in FIG. Alternatively, the channel 130 may be formed between a pair of welded portions 160, or may be formed between the welded portion 140 at the end of the film portion 110 and the welded portion 160 parallel thereto. may For example, in FIG. 8, the welded portion 160 may be formed at a position away from the welded portion 140 at the left end of the film portion 110 so as to extend in the vertical direction substantially parallel to the welded portion 140 . Even in this case, the channel 130 can be formed between the welded portion 140 at the end of the film portion 110 and the welded portion 160 parallel thereto.

Channel 130 preferably functions as a check valve. In this case, when the gas flows into the space 120, the gas can be prevented from flowing out naturally through the channel 130. FIG. Gas can flow into or out of the space 120 by passing a tool such as a straw from the cutting line 135 of the flow channel 130 into the flow channel 130 .

The thickness of the resin material forming the film portion 110 may be, for example, 20 μm to 200 μm, preferably 40 to 180 μm, more preferably 60 to 120 μm, in order to sufficiently exhibit the function as a check valve of the flow path 130 . Also, from the same point of view, the length of the channel 130 may be, for example, 10 mm to 150 mm, preferably 30 to 120 mm, more preferably 50 to 100 mm. From a similar point of view, the width of channel 130 may be, for example, 2 to 15 mm, more preferably 5 to 10 mm.

When the film assembly 100 is not used, the film assembly 100 can be stored compactly by letting the air flow out from the space 120 and folding or rolling the film portion 110 . Furthermore, a portable partition can be realized.

The film assembly 100 may have a base 190 on which the film assembly stands. If the film portion 110 can stand alone, the base 190 is unnecessary. The base 190 may be detachably attached to the film portion 110 .

The base 190 may preferably be configured to stand the film assembly such that the at least one weld line L is along the direction of gravity. In this case, since the film assembly can be erected with the film portion 110 being bent with the welding line L as a base point, the shape of the film assembly (the shape when viewed from above) can be flexibly changed.

In the first embodiment, the base 190 may have a pair of sandwiching portions 192 sandwiching the welding line L of the film portion 110 and a bottom surface 194 in contact with the installation surface. As shown in FIG. 10, the base 190 may stably stand the film assembly by sandwiching and holding the two welding lines L with, for example, a pair of clamping portions 192 .

[Second embodiment]
A film assembly according to the second embodiment will be described. FIG. 11 is a perspective view of the film assembly according to the second embodiment. FIG. 12 is a perspective view of a base for standing the film assembly according to the second embodiment.

Note that hereinafter, the same reference numerals are assigned to the same configurations as in the first embodiment. Below, the description may be abbreviate|omitted about the structure similar to 1st Embodiment.

In the second embodiment, the configuration of the film portion 110 of the film assembly is the same as in the first embodiment. In the second embodiment, the configuration of the base 190 is different from that in the first embodiment. In the second embodiment, the base 190 has a bottom portion 198 in contact with the installation surface and support rods 196 that support the film portion 110 .

A support rod 196 extends upward from the base 190 . The support rod 196 may be adhered to the film portion 110 with, for example, an adhesive material. Alternatively, the film assembly 110 may be formed with a cylindrical hole for receiving the support rod 196, and the film assembly may be held by inserting the support rod 196 into the cylindrical hole. .

FIG. 13 is a schematic diagram showing an example of the structure of the space, the flow path, the welding part, and the welding line of the film assembly according to the second embodiment. As shown in FIG. 13, the film portion 110 is formed with a cylindrical hole portion 111 capable of receiving the support rod 196 from below. The support rod 196 is configured to be insertable into the hole 111 . The film portion 110 may have a plurality of holes 111 so that the installation positions of the support rods 196 can be changed.

[Third Embodiment]
A film assembly according to the third embodiment will be described. 14A and 14B are schematic diagrams showing the structures of the space, the flow path, the welding part, and the welding line of the film assembly according to the third embodiment. Note that hereinafter, the same reference numerals are assigned to the same configurations as in the first embodiment. Below, the description may be abbreviate|omitted about the structure similar to 1st Embodiment.

In the third embodiment, the welding lines L that separate the sections 122 of the space portion 120 do not reach both ends of the film portion 110 . As a result, the communicating portions 150 that fluidly connect the sections 122 are formed at two locations, the upper portion and the lower portion, of the film portion 110 . In this way, there may be a plurality of communicating portions 150 that communicate between adjacent sections 122 .

The length of each communicating portion 150 is as described in the first embodiment. In the third embodiment, since there are a plurality of communicating portions 150 that communicate between the adjacent sections 122, the area that communicates between the adjacent sections 122 can be expanded without increasing the length of each communicating section 150. You can make it bigger. As a result, the gas that has flowed in from the channel 130 moves to the sections 122 adjacent to each other and easily spreads over all the sections 122 .

As shown in FIG. 14, the end of each weld line L may have an enlarged diameter portion 180 with a wider weld area. As a result, the welding line L is firmly welded, and peeling of the film along the welding line L can be suppressed. Preferably, the enlarged diameter portion 180 is curved in a substantially circular shape. As a result, the welded portion of the enlarged diameter portion 180 is less likely to come off compared to the case where the enlarged diameter portion 180 has a sharp corner.

[Fourth Embodiment]
A film assembly according to the fourth embodiment will be described. FIG. 15 is a schematic diagram showing the structures of the space, the flow path, the welding part and the welding line of the film assembly according to the fourth embodiment. Note that hereinafter, the same reference numerals are assigned to the same configurations as in the first embodiment. Below, the description may be abbreviate|omitted about the structure similar to 1st Embodiment.

In the fourth embodiment, the communication portions 150 that fluidly connect the compartments 122 are formed at two locations, the upper portion and the middle portion, of the film portion 110 . In this way, there may be a plurality of communicating portions 150 that communicate between adjacent sections 122 .

The length of each communicating portion 150 is as described in the first embodiment. In the fourth embodiment, since there are a plurality of communicating portions 150 that communicate between the adjacent sections 122, the area that communicates between the adjacent sections 122 can be expanded without increasing the length of each communicating section 150. You can make it bigger. As a result, the gas that has flowed in from the channel 130 moves to the sections 122 adjacent to each other and easily spreads over all the sections 122 .

Also, in the fourth embodiment, the welding line L reaches the lower end of the film portion 120 . As a result, the rigidity of the lower end of the film portion 120 is easily ensured, so that the film assembly 100 can be easily erected. Further, since the welding line L reaches the lower end of the film portion 120, there is also the advantage that the base 190 sandwiching the welding line L can be easily attached.

Although not shown in FIG. 15, the end of each welding line L may have an enlarged diameter portion 180 as in the third embodiment.

[Fifth embodiment]
A film assembly according to the fifth embodiment will be described. FIG. 16 is a schematic diagram showing the structures of the space, the flow path, the welding part and the welding line of the film assembly according to the fifth embodiment. Note that hereinafter, the same reference numerals are assigned to the same configurations as in the first embodiment. Below, the description may be abbreviate|omitted about the structure similar to 1st Embodiment.

In the fifth embodiment, the communication portions 150 that fluidly connect the compartments 122 are formed at three locations, the upper portion, the middle portion, and the lower portion of the film portion 110 . In this way, there may be a plurality of communicating portions 150 that communicate between adjacent sections 122 .

The length of each communicating portion 150 is as described in the first embodiment. In the fifth embodiment, since there are a plurality of communicating portions 150 that communicate between adjacent sections 122, the area that communicates between adjacent sections 122 can be expanded without increasing the length of each communicating section 150. can be made larger. As a result, the gas that has flowed in from the channel 130 moves to the sections 122 adjacent to each other, and spreads easily through all the sections 122 .

Although not shown in FIG. 16, the end of each weld line L may have an enlarged diameter portion 180 as in the third embodiment.

[Sixth Embodiment]
A film assembly according to the sixth embodiment will be described. 17A and 17B are schematic diagrams showing the structures of the space, the flow path, and the welded portion of the film assembly according to the sixth embodiment. Note that hereinafter, the same reference numerals are assigned to the same configurations as in the first embodiment. Below, the description may be abbreviate|omitted about the structure similar to 1st Embodiment.

A film assembly 100 according to the sixth embodiment is a balloon. Balloons can be used, for example, in applications such as toys, bags, cushioning, or inflatable novelty products. The film assembly 100 has a film portion 110 that includes films stacked on top of each other. The material forming the film portion 110 is as described in the first embodiment.

The film portion may be configured by stacking two films, or may be configured by stacking one film by folding.

The film portion 110 has a space portion 120 capable of storing gas, and a channel 130 that fluidly communicates between the inside and the outside of the space portion 120 . In the sixth embodiment, the space 120 is not partitioned into multiple compartments.

In the sixth embodiment, the channel 130 is formed between the bending line L of the film portion 110 and the welded portion 160 of the film portion 110 . Alternatively, the channel 130 may be formed between the welded portions of the film portion 110 . The width and length of the channel 130 are as described in the first embodiment.

[Seventh Embodiment]
A film assembly according to the seventh embodiment will be described. FIG. 18 is a schematic diagram showing the structures of the space, the flow path, and the welded portion of the film assembly according to the seventh embodiment. Note that hereinafter, the same reference numerals are assigned to the same configurations as in the sixth embodiment. Below, the description may be omitted about the structure similar to 6th Embodiment.

In the seventh embodiment, the space 120 is provided at a position not adjacent to the side of the flow path 130 . Specifically, welded portion 140 is provided to define space portion 120 so that space portion 120 is not located on the side of welded portion 160 that forms channel 130 . As a result, the tip of the welded portion 160 forming the flow path 130 does not terminate, so that the peeling of the welded portion 160 due to gas pressure can be suppressed.

[Eighth Embodiment]
A film assembly according to the eighth embodiment will be described. FIG. 19 is a schematic diagram showing the structures of the space, the flow path, and the welded portion of the film assembly according to the eighth embodiment. Note that hereinafter, the same reference numerals are assigned to the same configurations as in the sixth embodiment. Below, the description may be omitted about the structure similar to 6th Embodiment.

In the eighth embodiment, the space 120 is defined by the bending line F and the welded portion 140 . Moreover, the flow path 130 is formed between the bending line L of the film portion 110 and the welded portion 160 of the film portion 110 .

The welded portion 160 that defines the channel 130 extends from the end of the film portion 110 toward the space portion 120 and has an enlarged diameter portion 170 that widens to partially narrow the width of the channel 130 . As a result, the space 120 is constricted so as to partially narrow its width. This constriction makes it difficult for the gas to flow out naturally when the space 120 is inflated, thereby improving the function as a check valve. The shape of the expanded diameter portion 170 improves the sealing performance, and can suppress peeling and tearing when the space portion 120 is inflated.

Further, in the eighth embodiment, the enlarged diameter portion 170 is curved. As a result, compared to the case where the enlarged diameter portion 170 has a sharp corner, the welded portion of the enlarged diameter portion 170 is less likely to come off, and deterioration of the function as a check valve can be suppressed.

[Ninth Embodiment]
A film assembly according to the ninth embodiment will be described. FIG. 20 is a schematic diagram showing the structures of the space, the flow path, and the welded portion of the film assembly according to the ninth embodiment. Note that hereinafter, the same reference numerals are assigned to the same configurations as in the sixth embodiment. Below, the description may be omitted about the structure similar to 6th Embodiment.

In the ninth embodiment, similarly to the seventh embodiment, the space 120 is provided at a position not adjacent to the side of the flow path 130 . Further, similarly to the eighth embodiment, the welded portion 160 defining the flow path 130 extends from the end of the film portion 110 toward the space portion 120 so as to partially narrow the width of the flow path 130 . It has a widened enlarged diameter portion 170 .

[Tenth embodiment]
A film assembly according to the tenth embodiment will be described. FIG. 21 is a schematic diagram showing the structures of the space, the flow path, and the welded portion of the film assembly according to the tenth embodiment. Note that hereinafter, the same reference numerals are assigned to the same configurations as in the sixth embodiment. Below, the description may be omitted about the structure similar to 6th Embodiment.

In the tenth embodiment, as in the eighth embodiment, the welded portion 160 that defines the flow path 130 extends from the end of the film portion 110 toward the space 120 and partially covers the width of the flow path 130. It has an enlarged diameter portion 170 that widens to a narrower diameter. As a result, the space 120 is constricted so as to partially narrow its width. This constriction makes it difficult for the gas to flow out naturally when the space 120 is inflated, thereby improving the function as a check valve.

In the tenth embodiment, the welded portion as the enlarged diameter portion 170 is not curved and has a rectangular or square shape. A welded portion having such a shape has an advantage that it can be easily formed.

[Eleventh embodiment]
A film assembly according to the eleventh embodiment will be described. FIG. 22 is a schematic diagram showing the structures of the space, the flow path, and the welded portion of the film assembly according to the eleventh embodiment. Note that hereinafter, the same reference numerals are assigned to the same configurations as in the sixth embodiment. Below, the description may be omitted about the structure similar to 6th Embodiment.

In the eleventh embodiment, on the bending line L defining the flow path 130, an enlarged diameter portion 170 is provided so as to partially narrow the width of the flow path 130. FIG. The expanded diameter portion 170 is formed by a welded portion to which the film portion 110 is welded. Specifically, the enlarged diameter portion 170 is provided at the position shown in the tenth embodiment, that is, on the side opposite to the welding portion 160 .

[Twelfth Embodiment]
A film assembly according to the twelfth embodiment will be described. 23A and 23B are schematic diagrams showing the structures of the space, the flow path, and the welded portion of the film assembly according to the twelfth embodiment. Note that hereinafter, the same reference numerals are assigned to the same configurations as in the sixth embodiment. Below, the description may be omitted about the structure similar to 6th Embodiment.

The welded portion 160 that defines the channel 130 extends from the end of the film portion 110 toward the space portion 120 and has an enlarged diameter portion 170 that widens to partially narrow the width of the channel 130 . In the twelfth embodiment, the enlarged diameter portion 170 is curved. As a result, the space 120 is constricted so as to partially narrow its width. This constriction makes it difficult for the gas to flow out naturally when the space 120 is inflated, thereby improving the function as a check valve.

[Thirteenth embodiment]
A film assembly according to the thirteenth embodiment will be described. FIG. 24 is a schematic diagram showing the structures of the space, the flow path, and the welded portion of the film assembly according to the thirteenth embodiment. Note that hereinafter, the same reference numerals are assigned to the same configurations as in the sixth embodiment. Below, the description may be omitted about the structure similar to 6th Embodiment.

The fold line L defining the flow path 130 has an enlarged diameter portion 170 that widens to partially narrow the width of the flow path 130 . The expanded diameter portion 170 is formed by a welded portion to which the film portion 110 is welded. In the twelfth embodiment, the enlarged diameter portion 170 is curved. The enlarged diameter portion 170 is provided at the position shown in the twelfth embodiment, that is, on the side opposite to the welding portion 140 .

As described above, the subject matter of the present invention has been disclosed through embodiments, but the statements and drawings forming part of this disclosure should not be construed as limiting the present invention. Various alternative embodiments, implementations and operational techniques will become apparent to those skilled in the art from this disclosure. Therefore, the technical scope of the present invention is defined only by the matters specifying the invention according to the valid scope of claims based on the above description.

For example, each feature described in each embodiment can be replaced with each other and/or combined as much as possible. For example, the features of the enlarged diameter portion 170 of the welded portion defining the flow path 130 described in the eighth, tenth, and twelfth embodiments can also be applied to the partitions described in the first to fifth embodiments. (see, for example, FIG. 14).

The film portion of the film assembly according to the sixth to thirteenth embodiments has a substantially rectangular shape when the space does not contain air, but the present invention is not limited to this. The shape of the film portion may be, for example, heart-shaped or star-shaped. In this case, the channels 130 may be provided along the sides of the heart shape or star shape.

Further, in the above-described embodiment, the gas flows into/out of the space of the film portion, but the liquid may flow into/out of the space of the film portion. Therefore, the space may be an element capable of storing fluid.

It should be noted that, for example, the following inventions can also be read from the description of the above embodiments.
partition and
having film portions overlapping each other;
The film part
a space capable of storing a fluid;
and a flow path that fluidly communicates the inside and the outside of the space.

100 film assembly 110 film portion 120 space portion 122 section 130 flow path 190 base F bending line L welding line

Claims (7)

having film portions overlapping each other;
The film part
a space capable of storing a fluid;
a flow path that fluidly communicates between the inside and the outside of the space and functions as a check valve;
The flow path is formed by a cylindrical film portion defined by a bending line of the film portion and a welded portion formed in the overlapping portion of the film portion,
The channel extends in one direction, one side of the channel along the one direction is the folding line, and the other side of the channel along the one direction is An expandable and contractible film assembly, which is the weld. 2. The film assembly according to claim 1, wherein said welding portion extends from an end of said film portion toward said space portion and has an enlarged diameter portion that widens to partially narrow the width of said flow path. product. 3. The film assembly of claim 2, wherein said enlarged diameter portion is curved. having film portions overlapping each other;
The film part
a space capable of storing a fluid;
a channel that fluidly connects the inside and the outside of the space;
a welded portion formed in a portion of the film portion that overlaps with each other and provided along the flow path ;
The welded portion extends from the end of the film portion toward the space portion and has an enlarged diameter portion that widens to partially narrow the width of the flow path,
An expandable and contractible film assembly, wherein said enlarged diameter portion is curved. 5. According to any one of claims 1 to 4, comprising at least one weld line dividing said space into a plurality of compartments in fluid communication with each other, and a communication part in fluid communication with said compartments. A film assembly as described. 6. The film assembly of claim 5, comprising a base for erecting the film assembly such that the at least one weld line is along the direction of gravity. 7. A film assembly according to any one of claims 1-6, wherein the film assembly is a partition.

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