WO2021033346A1

WO2021033346A1 - Sealed body

Info

Publication number: WO2021033346A1
Application number: PCT/JP2020/001832
Authority: WO
Inventors: 小柳美史
Original assignee: 株式会社柏原製袋
Priority date: 2019-08-20
Filing date: 2020-01-21
Publication date: 2021-02-25
Also published as: JP2021031080A; JP6653913B1

Abstract

The present invention suppresses the possibility of conduction of a fluid between cells due to leakage of the fluid from a non-welded section. The present invention comprises: a hermetically sealed chamber comprising a seat valve, the hermetically sealed chamber being such that a plurality of cells 14 are formed in a compartmentalized manner by an inter-cell heat seal 33; a boundary heat seal 31 that regulates the interior from the exterior of the cells 14; and a communication opening 16 that crosses the boundary heat seal 31 and links the inside and outside of the hermetically sealed chamber. The seat valve comprises a non-welded section 25 that prevents closure by the boundary heat seal 31 by means of the communication opening 16. A contour heat seal 34 that stops leakage of a fluid from the non-welded section 25 is provided surrounding the non-welded section 25. Conduction of the cells 14 via the non-welded section 25 is suppressed by the contour heat seal 34.

Description

Sealed body

The present invention relates to a sealed body provided with a seat valve that can be applied to an air cushioning material, a degassing bag, or the like.

A sealed body provided with a seat valve can control the flow of a fluid such as air, and is therefore applied to various applications. For example, as shown in Patent Documents 1 to 4, when the seat valve is implemented as a check valve that allows the flow of fluid from the outside to the inside and does not allow the backflow to the outside, it is used by enclosing air inside. Can be applied to air cushioning materials. On the contrary, as shown in Patent Document 5, when the seat valve is implemented as a check valve that allows the flow of fluid from the inside to the outside and does not allow the inflow to the inside, clothes, futons, etc. are compressed and compact. It can also be applied to a degassing bag to be stored in.
The air cushioning materials shown in Patent Documents 1 to 4 include a main body having a plurality of main body sheets arranged so as to be stacked in the thickness direction, and a valve arranged to form a seat valve between the plurality of main body sheets. It has a seat. The main body includes a closed chamber in which a plurality of cells are partitioned by inter-cell seals, and a communication port for introducing air into the cells. The valve seat is attached to the communication port by a boundary seal, and the seat valve regulates the flow of the air inside and outside the cell at the communication port.

These cells are arranged along a common passage, and the communication port of each cell is connected to the common passage. In order to introduce air into these cells, it is only necessary to flow the air from the common passage, whereby air is introduced into each cell from the communication port of each cell. Then, even after the introduction of the air is stopped, the outflow of the air is regulated by the action of the valve seat, and each cell maintains a state of being inflated by the air.

More specifically, FIG. 4 of Patent Document 1 shows an apparatus suitable for mass production of this type of air cushioning material. Hereinafter, the description will be described with reference to the description of the specification of Patent Document 1. The terms and symbols in the quotation do not always match the terms and symbols of the present application.
"In the manufacturing apparatus 5 of this example, as shown in FIG. 4, the sheet supply means 51, the sheet feed means 52, the fixing seal portion forming means 53, the sheet supply amount adjusting means 54, the front and rear seal portions and the like forming means 55, It includes left and right seal portion forming means 56.
In the valve seats 2a and 2b, the portion not to be heat-sealed, specifically, the left and right seal portions 13 is interrupted to form the air passage inlet 12a before being attached to the seat supply means 51 of the manufacturing apparatus 5. Paint is applied to the one-sided valve sheet 2a of the portion in advance. Then, the valve sheets 2a and 2b are doubly overlapped and wound in a roll shape. This is attached to the sheet supply means 51 as a raw fabric.
The sheet supply means 51 supplies the bag sheets 1a and 1b and the valve sheets 2a and 2b, which are rolled in a roll shape as raw fabrics, to each means. The supply to each means is performed by sequentially feeding each sheet in the longitudinal direction (left-right direction L) by a sheet feeding means 52 such as a rotating roller. "
"In this example, a heat seal is used as a means for sealing each sheet. And this seal is formed in three stages. First, by the fixing seal portion forming means 53, FIG. 5 As shown in (A), the fixing seal portion 3 is formed, and the front-rear seal portion 14 and the reinforcing seal portion 15 are formed by the front-rear seal portion and the like forming means 55 as shown in FIG. 5 (B). Next, the left and right seal portions 13 are formed by the left and right seal portion forming means 56, as shown in FIG. 5 (C).
Next, it will be described according to the processing procedure.
The roll-shaped raw fabric is coordinated to the sheet supply means 51. In this case, the bag sheets 1a and 1b are coordinated separately in the upper and lower parts, and the valve sheets 2a and 2b formed into one roll by stacking the two sheets as described above are coordinated between them.
Then, the one-side bag sheet 1a and the valve sheets 2a and 2b are overlapped with each other, and the fixing seal portion 3 is formed by the fixing seal portion forming means 53 as shown in FIG. 5 (A). As a result, the one-side bag sheet 1a and the valve sheets 2a and 2b are integrated.
After that, the one-side bag sheet 1a and the valve sheets 2a and 2b, which are integrated by forming the fixing seal portion 3 as described above, pass through the feed amount adjusting means 54.
Then, each of these sheets 1a, 2a, 2b and the other side bag sheet 2b are superposed, and the left and right seal portions are formed by the front and rear seal portion and the like forming means 55 as shown in FIG. 5 (B). Subsequently, as shown in FIG. 5C, the front and rear seal portions are formed by the left and right seal portion forming means 56, and the sealed body 1 is completed. "

As described above, the main body sheet (bag sheet) and the valve sheet are each supplied as a continuous long band, and the valve sheet is sandwiched between the two main body sheets and welded. The valve seat is fixed between the two main body seats, and the cell and the common passage are also formed.

As described above, the closed chamber is divided into a large number of the cells by the inter-cell seal, and since these cells are independent, even if one cell is torn during use or the like, the other cells are used. The cell can be maintained in an inflated state, and has the advantage of being able to suppress a sudden decrease in cushioning performance as an air cushioning material.

In Patent Documents 1 to 4, an air cushioning material in which one communication port and a seat valve are provided for one cell is shown, but when the size of one cell is increased, one is shown. In some cases, a plurality of communication ports are provided for the cell. In particular, in the case of a seat valve, the performance of the seat valve, such as the tightness of the valve and the amount of resistance at the time of introduction or discharge of fluid, depends on the size (width) of the communication port.
Therefore, even if the size of one cell changes, the communication ports are continuously formed at a constant pitch, and the interval at which the inter-cell seal is provided is changed according to the purpose and mode of use of the air cushioning material. Is advantageous.

However, in the seat valve, the non-welded portion is generally provided so that the communication port and the valve passage are not welded and blocked by the boundary seal, and the size of the communication port is large. The size and pitch of the non-welded portion are determined according to the size and pitch.
As a result, when the interval at which the inter-cell seal is provided is changed with respect to the valve seat in which the non-welded portion of a predetermined size is continuously formed at a predetermined pitch, the non-welded portion of the seat valve The position may match the position of the inter-cell seal. In this matching state, even if the cell-to-cell seal is applied, the non-welded portion is not heat-sealed, so that the air leaks from the non-welded portion, and the air can be conducted between the cells. This may result in impairing the advantage of the cell's independence.

Japanese Patent No. 4160051 Japanese Patent No. 4030333 Special Fair 7-5123 Gazette Japanese Patent No. 3579660 Japanese Patent No. 4084613

The present invention includes a main body having a plurality of main body seats arranged so as to be stacked in the thickness direction, and a valve seat arranged to form a seat valve between the plurality of main body seats. The cell is provided with a closed chamber in which the cells are partitioned by an inter-cell seal, a boundary seal between the cell and the outside, and a communication port located on the boundary seal, and the seat valve provides the inside and outside of the cell. In a sealed body in which the flow of the fluid is restricted, even if the position of the non-welded portion of the seat valve and the position of the inter-cell seal are in a matching state, the fluid from the non-welded portion An object of the present invention is to prevent the fluid from being able to communicate with each other due to leakage.

An object of the present invention is to prevent the advantage of cell independence from being impaired in this type of sealed body.

An object of the present invention is to provide a sealed body of this type capable of determining the cell size and the spacing between cells without depending on the pitch of the non-welded portion of the seat valve.

The present invention includes a main body having a plurality of main body seats arranged so as to be stacked in the thickness direction, and a valve seat arranged to form a seat valve between the plurality of main body seats. The seat valve is provided with a closed chamber in which the cells are partitioned by an inter-cell seal, a boundary seal between the cell and the outside, and a communication port that connects the inside and outside of the closed chamber across the boundary seal. It relates to a modification of a sealed body in which the flow of the fluid inside and outside the cell is regulated by.
In the present invention, the seat valve includes a valve passage through which the fluid flows and a non-welded portion that prevents the communication port from being closed by the boundary seal. Then, an outer seal for stopping the leakage of fluid from at least one non-welded portion is provided around the non-welded portion at least inside the cell. As a result, the outer seal is configured to prevent the cells from conducting each other through the non-welded portion.
The outer seal may be connected to the inter-cell seal, may be provided on the inter-cell seal, or may be provided around all the non-welded portions. Alternatively, the inter-cell seal may also be used as the outer seal.

The present invention can also be implemented as a sealed body in which the seat valve is opened only when the fluid is discharged from the closed chamber to the outside, but conversely, when the fluid is introduced into the inside from the closed chamber. It can also be implemented as a sealed body in which the seat valve is opened, and a typical example thereof is a cushioning material in which a protected object is protected from an external impact or the like by an inflated closed chamber.

Specifically, when the present invention is carried out as a cushioning material, the fluid is air, a plurality of the cells are arranged along a common passage, and a plurality of the communication ports are arranged for one cell. These communication ports are open to the common passage, and the seat valve can be implemented as a check valve that allows the inflow of the air from the common passage into the cell and does not allow the outflow. Then, the valve sheet can be implemented as if it is provided with a seal in the flow path. The seal in the flow path may be used to fix only the valve sheets to each other, but the valve sheet is fixed to the main body sheet of one of the plurality of main body sheets by the seal in the flow path. By not being fixed to the other main body sheet, when the cell is inflated by the air, the valve sheet is pressed against one of the main body sheets, so that the check valve function is more reliably exhibited. The air cushioning material to be used can be provided.

The present invention can be carried out assuming that a plurality of the closed chambers are provided. These closed chambers are independent of each other and can be provided on a common main body sheet. These closed chambers can be provided on both sides of the common passage, or can be provided on one side of each of the separate common passages.

Further, in at least one closed chamber, the inter-cell seal and the cells may be provided at unequal pitches.
Even when a plurality of the closed chambers are provided, the inter-cell seals and the pitches at which the cells are provided between the closed chambers may be the same or different.
The width of the outer shell seal needs to be larger than that of one non-welded portion provided with the outer shell seal, but if it is larger than that, the width can be appropriately set and one of the non-welded portions. It may reach the non-welded portion arranged on both sides of the above.

Further, it suffices that the outer seal is provided around at least one non-welded portion, and may not be provided around at least one other non-welded portion. From the viewpoint of the design of the closed body and the cell, in other words, whether it is better to prioritize the independence of the cells or the continuity between the cells depends on the use of the closed body and one closed body. It can be determined by the position and role of the cell in the above, and it is possible to determine whether or not to provide the outer seal from such a design viewpoint.

The cells do not necessarily have to be independent of each other, and the inter-cell seal may include an inter-cell passage and the adjacent cells may be connected to each other via the inter-cell passage.
The main body sheet is provided with a hole for degassing, and by implementing the hole as if it is closed by a lid such as an openable tape, when it becomes necessary to drain the fluid at the time of disposal after use. Can also be carried out so that the fluid can be rapidly discharged by removing the lid such as tape.

The present invention includes a main body having a plurality of main body seats arranged so as to be stacked in the thickness direction, and a valve seat arranged to form a seat valve between the plurality of main body seats. The cell is provided with a closed chamber in which the cells are partitioned by an inter-cell seal, a boundary seal between the cell and the outside, and a communication port located on the boundary seal, and the seat valve provides the inside and outside of the cell. In a sealed body in which the flow of the fluid is restricted, even if the position of the non-welded portion of the seat valve and the position of the inter-cell seal are in a matching state, the fluid from the non-welded portion It was possible to prevent the fluid from being able to communicate with each other due to leakage.

The present invention has been able to prevent the cell's independence advantage from being compromised in this type of sealed body.

The present invention has been able to provide a sealed body of this type capable of determining the size of cells and the spacing between cells without depending on the pitch of the non-welded portion of the seat valve. Is.

The present invention can be applied to an air cushioning material used by enclosing air inside by implementing the seat valve as a check valve that allows the flow of fluid from the outside to the inside and does not allow the backflow to the outside. On the contrary, by implementing the seat valve as a check valve that allows the flow of fluid from the inside to the outside and does not allow the inflow to the inside, degassing that compresses clothes, futons, etc. and stores them compactly. It can also be applied to bags.

The plan view of the sealed body which concerns on 1st Embodiment of this invention. Enlarged plan view of the same main part. (A) AA line end view of FIG. 2, (B) BB line end view of FIG. 2, (C) CC line end view of FIG. 2, and (D) DD line end face of FIG. FIG. 2 (E) is an end view of the EE line of FIG. The main part plan view of the sealed body which concerns on 2nd Embodiment of this invention. The main part plan view of the sealed body which concerns on 3rd Embodiment of this invention. The main part plan view of the sealed body which concerns on 4th Embodiment of this invention. The main part plan view of the sealed body which concerns on 5th Embodiment of this invention. The main part plan view of the sealed body which concerns on 6th Embodiment of this invention. The main part plan view of the sealed body which concerns on 7th Embodiment of this invention. The main part plan view of the sealed body which concerns on 8th Embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In each end view for showing the cross-sectional structure in the present invention, in order to show the relationship between the sheets, the sheets that are normally in contact with each other are drawn with a larger distance than the actual one, and the sheets are fused by heat sealing. It should be understood as a schematic diagram, such as showing only the positional relationship between the seal and the sheet, and not drawing the deformation of the sheet normally caused by the heat seal.
As the seal, a heat seal, which is a typical example of the fusing means used for joining this type of bag or valve, can be adopted. In the following description of the embodiment, the boundary seal is referred to as the boundary heat seal 31. The cell-cell seal is referred to as an inter-cell heat seal 33, the flow path seal is referred to as a flow path heat seal 26, and the outer shell seal is referred to as an outer heat seal 33.

(First Embodiment: FIGS. 1 to 3)
(Overview)
This airtight body is implemented as an air cushioning material, and the main body is formed by the main body sheet 10 composed of the front main body sheet 11 and the rear main body sheet 12 arranged so as to be stacked in the thickness direction, and the front main body sheet 11 and the rear main body are formed. A valve seat 20 is arranged between the seats 12 to form the seat valve 23. The valve sheet 20 can be composed of one or a plurality of sheets, but in this example, it is composed of two sheets, a front valve sheet 21 and a rear valve sheet 22.
The main body has a boundary heat seal 31 that defines the inside and outside of the closed chamber 13 by sealing the closed chamber 13 and all the sheets (four sheets in this example) of the main body seat 10 and the valve seat 20, and the boundary heat seal. A communication port 16 provided on the 31 so as to cross the 31 is provided. In the communication port 16, the space between the valve seats 20 (between the front valve seat 21 and the rear valve seat 22 in this example) is not welded, and the fluid inside and outside the closed chamber 13 passes through the communication port 16. Distribution becomes possible.
In this example, a common passage 15 is formed by providing the outer peripheral heat seal 32 on the outside of the closed chamber 13, that is, on the outside of the boundary heat seal 3.

In the closed chamber 13, a plurality of cells 14 are partitioned by an inter-cell heat seal 33, and the closed chamber 13 (each cell 14) is connected to an external common passage 15 by a communication port 16.
The flow of the fluid inside and outside the cell 14 (air in this example) is regulated by the seat valve 23. Specifically, in this embodiment, the fluid that the seat valve 23 flows into the cell 14 It is implemented as a check valve that allows only the flow of the fluid and shuts off the flow of the fluid flowing out of the cell 14. The two valve seats 20 constituting the seat valve 23 are welded to each other by the boundary heat seal 31, and are also welded to the two main body seats 10. It is sufficient that the two valve sheets 20 are arranged inside the boundary heat seal 31, but they may protrude into the common passage 15 on the outside in consideration of an error during manufacturing.
A synthetic resin sheet made of a flexible single-layer film can be used for the main body sheet 10 and the valve sheet 20, but the main body sheet 10 is made of a metal foil depending on the intended use of the sealed body and the like. It may be made of a composite material such as paper or paper.

(About valve seat 20)
To explain the valve seat 20 in more detail, the valve seat 20 is composed of a front valve seat 21 and a rear valve seat 22 that are continuous in the left-right width direction (left-right direction in FIG. 1). The valve passage 24 is between the front valve seat 21 and the rear valve seat 22, and the fluid that has entered the valve passage 24 from the common passage 15 through the communication port 16 passes between the front valve seat 21 and the rear valve seat 22. Then, from the open free end 27 of the front valve seat 21 and the rear valve seat 22, the cell 14 is entered and the cell 14 (that is, the closed chamber 13) is filled. The front valve seat 21 and the rear valve seat 22 are in close contact with each other due to the pressure of the fluid filling the cell 14 (that is, the closed chamber 13), and even if the fluid tries to flow out from the closed chamber 13, the front valve seat 21 and the rear valve seat 22 Since it maintains a close contact state, its outflow is not allowed and the check valve function is fulfilled.

In FIG. 1, the left and right sides of the valve seat 20 are defined by the inter-cell heat seal 33, and the upper and lower sides thereof are defined by the boundary heat seal 31 and the free end side 27, and one seat valve is defined by these. 23 is configured.
The seat valve 23 includes a heat seal 26 in the flow path, and the heat seal 26 in the flow path has a front valve seat 21 and a rear valve seat 22 as one main body seat 10 (in this example, the rear main body seat 12 (FIG. 6). It is fixed only to (see (E))) and not fixed to the other main body sheet 10 (front main body sheet 11 in this example). As a result, the front valve seat 21 and the rear valve seat 22 are pressed against one main body seat 10 (in this example, the rear main body seat 12) in close contact with each other by the fluid filled inside the cell 14. As a result, the valve passage 24 can be maintained in a closed state, and the valve function is ensured by guiding or regulating the direction of the fluid flowing inside the valve passage 24 depending on the shape of the seal portion. To be demonstrated in.

(About communication port 16)
Each seat valve 23 includes a valve passage 24 through which a fluid flows inside the seat valve 23, and a communication port 16 through which the valve passage 24 communicates with the outside. The communication port 16 is formed so as to cross the boundary heat seal 31 which is the boundary between the inside and outside of the closed chamber 13, in other words, the cell 14, and the communication port 16 is a valve without the boundary heat seal 31. The passage 24 is in an open state. However, the main body seat 10 and the valve seat 20 (specifically, the front main body seat 11 and the front valve seat 20, and the rear main body seat 12 and the rear valve seat 22) are welded together.

The communication port 16 includes a non-welded portion 25 for preventing the communication port 16 from being blocked by the boundary heat seal 31.
The non-welded portion 25 is coated with a heat-resistant paint or heat-resistant ink that does not weld at the heat-sealing heating temperature, or a synthetic resin sheet such as PET or polyamide having a melting temperature higher than the heat-sealing heating temperature or a heat-resistant sheet such as paper is arranged. It can be formed by
The non-welded portion 25 may be formed on at least one of two sheets (front valve seat 21 and rear valve seat 22 in this example) constituting the valve passage 24 through which the fluid flows, but in this example, the front valve seat 25 may be formed. It is formed only on the valve seat 21. The range in which the non-welded portion 25 is provided is sufficient as long as it is affected by the heating of the boundary heat seal 31, but it may be provided in a wider range than this.
In continuous production, the front valve seat 21 provided with the non-welded portions 25 at a predetermined pitch and the rear valve seat 22 are overlapped with each other, and these valve seats 20 are fed in the longitudinal direction. The heat seal 26 in the flow path is formed at a predetermined position by superimposing it on one main body sheet 10 (front main body sheet 11 in this example).

(About body sheet 10)
After the heat seal 26 in the flow path is formed and fixed to the front valve seat 21, the rear valve seat 22, and the rear main body seat 12, the other main body seat 10 (in this example, the front main body seat 11) constituting the main body is overlapped. The boundary heat seal 31, the outer peripheral heat seal 32, the inter-cell heat seal 33, and the outer heat seal 34 are formed at predetermined positions, whereby the front valve seat 21, the rear valve seat 22, the front main body seat 11 and the rear are formed. The main body sheet 12 is joined so that fluid cannot flow, and a closed body is completed.

The closed chamber 13 and its outside (a portion that does not maintain the hermeticity) are separated by a boundary heat seal 31. In the closed chamber 13, a plurality of cells 14 are partitioned by forming a plurality of inter-cell heat seals 33. The outer peripheral heat seal 32 is formed in parallel so as to intersect the boundary heat seal 31, and the outer peripheral heat seal 32 and the inter-cell heat seal 33 are provided with a common passage 15 for supplying a fluid to each cell 14. Become. The outer peripheral heat seal 32 can also be applied to the other outer circumference of the sealed body.
Each cell 14 is provided with at least one (five in this example) communication ports 16 between the inside and the outside of the cell, for which the non-welded portions 25 are formed at five locations as described above. There is. In this example, the communication ports 16 are formed at equal intervals and at the same pitch, but they may be formed with different widths and different pitches.

In this example, five communication ports 16 are arranged in one cell 14, but the number of communication ports 16 can be an appropriate number of one or more, and each communication port 16 is a common passage 15. The fluid supplied from the common passage 15 is introduced into the cell 14 from the communication port 16 through the valve passage 24 between the front valve seat 21 and the rear valve seat 22, and each cell 14 is a fluid. It swells and becomes a buffer function. On the other hand, even if the fluid inside the cell 14 tries to flow out, the valve passage 24 is blocked by the front valve seat 21 and the rear valve seat 22 coming into close contact with each other, and the outflow is stopped.

(Non-independence of cell 14)
Since each cell 14 is partitioned by an inter-cell heat seal 33, they are independent of each other, and even if one cell 14 is torn, the other cells 14 remain inflated without being affected by it. be able to. However, if the non-welded portion 25 is arranged at a position that matches the inter-cell heat seal 33, the inter-cell heat seal 33 is not welded at the matched portion. As a result, if the cells 14 on the left and right sides of the inter-cell heat seal 33 conduct with the non-welded portion 25 as a passage, the independence of the cells 14 cannot be maintained, and one cell 14 is torn, the other cells 14 Can't keep inflated.

Therefore, in the conventional closed body, the cell 14 and the non-welded portion 25 are provided in a one-to-one relationship so that the non-welded portion 25 does not match the inter-cell heat seal 33 of the main body sheet 10. Therefore, the independence of the cell 14 was planned. Therefore, the cell 14 of the main body sheet 10 and the non-welded portion 25 of the valve sheet 20 are each provided with a predetermined width and a predetermined pitch.
As a result, when trying to change the width and pitch of the cell 14 of the main body sheet 10, the independence of the cell 14 may not be maintained unless the width and pitch of the non-welded portion 25 of the valve sheet 20 are changed. It ends up. In other words, the width and pitch of the cells 14 of the main body seat 10 to which one type of valve seat 20 can be applied must be limited, and its versatility is low.

(Independence of cell 14 of the present invention)
In the present invention, as shown in FIGS. 1 to 3, the versatility of the valve seat 20 is dramatically improved by providing the outer heat seal 34.
Specifically, in the sealed body according to the embodiment of the present invention, at least one inter-cell heat seal 33 is provided with an outer heat seal 34 that is one size larger than the non-welded portion 25. .. The outer heat seal 34 is formed so as to surround the outside of the non-welded portion 25 inside the boundary heat seal 31 (lower side in FIG. 1). Specifically, in FIG. 1, the non-welded portion is formed. It is formed on both the left and right sides and the lower side of 25. Although it may be provided outside the boundary heat seal 31 (upper side in FIG. 1), the cell 14 does not exist on the outside, and it is not airtight and meaningless. In this example, the common passage 15 It may also impede the flow of fluid.

The outer heat seal 34 may be provided continuously with the inter-cell heat seal 33 and the boundary heat seal 31, but may be provided separately and independently, or between the outer heat seal 34 and the inter-cell heat seal 33. A portion that is not welded may be provided.
Therefore, in FIG. 2, the outer heat seal 34, the inter-cell heat seal 33, and the boundary heat seal 31 are drawn separately, but the distinction is not necessary. However, it is not necessary to form the outer heat seal 34, the inter-cell heat seal 33, and the boundary heat seal 31 at the same time, and the outer heat seal 34 and the inter-cell heat seal 33 are simultaneously heat-sealed with one mold to perform the boundary heat seal. 31 may be heat-sealed in a different process with different molds.

Further, in FIG. 1, the outer heat seals 34 are formed on both the left and right sides of the non-welded portion 25, but the outer heat seals 34 are formed only on the outside of either the left or right side of the non-welded portion 25. However, if the width is larger than that of the non-welded portion 25 and the flow of fluid between the cells 14 is blocked, it can be carried out, but it is better to provide the heat seals 33 between cells on both sides. It is desirable from the viewpoint of fluid flow and control that the balance is uniform.

(Formation of outer heat seal 34)
The outer heat seal 34 may be formed at any stage in the manufacturing process of the sealed body, and the following three types of stages can be exemplified.

(1) Step of Creating Inter-Cell Heat Seal 33 From the viewpoint of limiting fluid leakage between cells 14, the inter-cell heat seal 33 is formed at the same time as or before or after the formation of the inter-cell heat seal 33. In this case, all the sheets of the main body seat 10 and the valve seat 20 are welded by the outer heat seal 34, such as the front main body seat 11, the rear main body seat 12, the front valve seat 21, and the rear valve seat 22. To.

(2) Stage for creating the heat seal 26 in the flow path At the stage for forming the heat seal 26 in the flow path, the positions of the cell 14 and the heat seal 33 between cells to suppress fluid leakage are determined, so that the heat seal between cells It is performed at the same time as or before or after the formation of 33. In this case, one of the main body seats 10 and the valve seat 20 is heat-sealed, such as the front main body seat 11, the rear main body seat 12, the front valve seat 21, and the rear valve seat 22. Welded by 34.

(3) Step of Creating the Valve Sheet 20 From the viewpoint of suppressing leakage of the fluid from the non-welded portion 25, the fluid between the front valve seat 21 and the rear valve seat 22 on which the non-welded portion 25 is provided. Since it is sufficient to suppress leakage, this is performed at the stage of preparing the valve sheet 20 before joining to the main body sheet 10. In this case, the front valve seat 21 and the rear valve seat 22 are welded by the outer heat seal 34, and are not welded to any of the main body seats 10. However, at the stage when the valve sheet 20 is created, the positions of the cell 14 and the inter-cell heat seal 33 may not be fixed. In such a case, the outer heat seal 34 is applied to all the non-welded portions 25. It is appropriate to form.

In the present invention, although not shown, the outer heat seal 34 may be formed as a seal independent of the other seals, or may be formed as a seal also used as the other seals. It does not matter, and in any case, it should be understood that it is included in the present invention. For example, when the width of the inter-cell heat seal 33 is made larger than the width of the non-welded portion 25 so that the leakage of fluid between the cells 14 from the inter-cell heat seal 33 is suppressed, the inter-cell heat seal 33 is suppressed. Since the heat seal 33 also serves as the outer heat seal 34, the outer heat seal 34 does not have to be provided separately. In this case, the outer heat seal 34 is also formed as the inter-cell heat seal 33 at the stage of producing the above-mentioned (1) inter-cell heat seal 33. Further, at the stage of creating the above-mentioned (2) heat seal 26 in the flow path, the outer heat seal 34 that also serves as the heat seal 26 in the flow path may be formed.

(Second embodiment: see FIG. 4)
In the first embodiment, the lateral width of the outer heat seal 34 is slightly larger than that of the non-welded portion 25, and the unit boundary seal portion 35 and the non-welded portion 25 between the non-welded portion 25 and the non-welded portion 25 are formed. However, in this embodiment, the width of the outer heat seal 34 is set to be larger than the width of one pitch between the unit boundary seal portion 35 and the non-welded portion 25. Is set. The width of the outer heat seal 34 reaches the non-welded portions 25 arranged on both sides of one non-welded portion 25. In the figure, the outer heat seal 34 is also formed on the non-welded portion 25, and a part of the non-welded portion 25 is not shown, but the shape of these non-welded portions 25 is other non-welded portion 25. It is a rectangle similar to the part 25.

The outer heat seal 34 can be carried out in any of the three embodiments (1), (2) and (3) described above, but in the case of the embodiment (1), the outer heat seal 34 is formed in the rectangular shape shown in the front by the outer heat seal 34. The main body seat 11 and the front valve seat 21, and the rear main body seat 12 and the rear valve seat 22 are welded to each other. On the other hand, the front valve seat 21 and the rear valve seat 22 are welded only to the portion excluding the non-welded portion 25, and the outer heat seal 34 is welded so as to surround the portion.
Similar to the second embodiment, the plan view of the third and subsequent embodiments is different from the boundary heat seal 31, the outer peripheral heat seal 32, the inter-cell heat seal 33, and the outer heat seal 34. Only the welded portion 25 is drawn, and the illustration of the heat seal 26 in the flow path and the like is omitted.

(Third embodiment: see FIG. 5)
In carrying out the present invention, the fluid leakage between all the cells 14 may be suppressed by the outer heat seal 34, and the fluid leakage between some cells 14 may be suppressed. It may not be suppressed by the heat seal 34. That is, there may be a non-welded portion 25 that is not provided with the outer heat seal 34 for the purpose of intentionally connecting the cells 14.

(Fourth Embodiment: see FIG. 6)
In this embodiment, the cells 14 are provided at unequal pitches. In the case of the prior art, it was possible to deal with only a multiple of a predetermined pitch without changing the mold for forming the valve seat 20, but in the present invention, the cells 14 have unequal pitches. Even if it is provided, it is possible to change the mold for forming the valve seat 20. In other words, there are no restrictions due to the size or pitch of the cell 14. As shown in the drawing, the outer heat seal 34 can be formed at the same pitch in the portion without the inter-cell heat seal 33, or the outer heat seal 34 can be formed only in the portion with the inter-cell heat seal 33. it can.

(Fifth Embodiment: see FIG. 7)
In carrying out the present invention, the cells 14 may be arbitrarily connected to each other. Whether or not the cells 14 are connected to each other can be arbitrarily determined and implemented depending on the purpose of use of the closed body and the like. In other words, the inter-cell passage 36 can be provided at an arbitrary position of the inter-cell heat seal 33, and the fluid of the cell 14 from the non-welded portion 25 can be provided regardless of whether the cells 14 are connected to each other. By suppressing the leakage by the outer heat seal 34, the inter-cell heat seal 33 can be connected or not connected according to each purpose.
That is, the present invention suffices if the closed chamber 13 has airtightness, and the airtightness of the cell 14 can be changed according to the purpose.

(Sixth Embodiment: see FIG. 8)
In the previous embodiment, an example in which the closed chamber 13 is formed only on one side of the common passage 15 is shown, but the common passage 15 is arranged in the center and sealed on both the upper and lower sides thereof via the boundary heat seal 31. It can be carried out assuming that the chamber 13 is arranged.
In this case, as shown in FIG. 8 (A), the pitches of the cells 14 are the same in the closed chambers 13 on both the upper and lower sides, and as shown in FIG. 8 (B), the cells are used in the closed chambers 13 on both the upper and lower sides. The pitches of 14 may be different. In the prior art, when a long body of a common bag sheet 10 is used and the long body is fed in the longitudinal direction to continuously produce a closed body, a plurality of rows of closed chambers 13 are provided along the feeding direction. When trying to manufacture a closed body, it may not be possible to manufacture it unless the cells 14 are made to have the same pitch in each row, or even if it can be manufactured, the production efficiency may be extremely lowered. In the present invention, since the size of the cell 14 and the distance between the cells 14 can be determined without depending on the pitch of the non-welded portion 25 of the seat valve 23, the cells 14 of the adjacent closed chambers 13 can be determined. Even if the pitches are different, continuous production can be performed efficiently.

(7th Embodiment: see FIG. 9)
In the sixth embodiment, the closed chambers 13 are arranged on both sides of the one common passage 15, but in this embodiment, the common passage 15 is not shared and one is placed in each of the closed chambers 13. An example in which two common passages 15 are provided is shown. In this case, the common passage 15 may be provided at a position along the end edge of the bag sheet 10 as shown in the drawing, and one common passage 15 is arranged in the center of the bag sheet 10 and the other. The common passage 15 may be arranged at a position along the edge of the bag sheet 10, or two independent common passages 15 may be arranged side by side. Even in this example, the differences in the pitches of the cells 14 between the closed chambers 13 may be the same or different.
Whether or not the common passage 15 is provided can be appropriately changed according to the design of the closed body. For example, a degassing bag (the seat valve 23 opens only when the fluid flows from the inside to the outside of the cell 14). In this case, the communication port 16 may be open to the outside of the closed body as it is.

(Eighth embodiment: see FIG. 10)
In the previous embodiment, the valve seat 20 is fixed to the seat on one side of the main body seat 10 by the heat seal 26 in the flow path, but as shown in this embodiment, The valve sheet 20 may be fixed to the main body sheet 10 only at the boundary heat seal 31. Further, it can be implemented assuming that the intermediate valve seat 28 is arranged in the center between the front valve seat 21 and the rear valve seat 22. Although not shown, the valve sheet 20 may be composed of one sheet. As an example of this, in the embodiment of FIG. 3, it can be shown that the rear valve seat 22 is not provided and the valve passage 24 is formed between the front valve seat 21 and the rear seat 22.

(Other embodiments)
The overall shape and structure of the enclosure can be implemented in a variety of ways, can be applied to any form of the prior art document of the present application, and to those not shown in these documents. It is also possible to apply.
To give an example thereof, although not shown, a hole for degassing is provided in at least one sheet of the main body sheet 10, the hole is covered with a tape or the like, and the tape or the like is peeled off after use. It can also be implemented as a cushioning material that releases air. It should be noted that the present invention does not prevent the application to a degassing bag or the like in which the seat valve 23 opens only when the fluid flows from the inside to the outside of the cell 14.
In each of the above embodiments, the fluid is supplied to each cell 14 through the common passage 15, but each cell 14 is connected to the outside of the closed body through an independent passage without providing the common passage 15. It may be a form in which independent passages of a plurality of cells 14 are merged from the middle and connected to the outside.

The material of the main body sheet 10 and the valve sheet 20 may be all made of polyethylene, and sheets of various materials can be adopted depending on the purpose.
Further, the color and transparent opacity of the main body sheet 10 and the valve sheet 20 can be completely freely implemented.
In particular, in carrying out the present invention, at least one of the main body sheets 10 (front main body sheet 11 or rear main body sheet 12) may have an opaque portion that overlaps with the non-welded portion 25. .. According to the conventional general manufacturing method, it is necessary to match the pitch of the non-welded portion 25 of the seat valve 23 with the pitch of the main body seat 10 and perform manufacturing while performing accurate positioning, and in order to realize this, it is necessary to manufacture. The position of the non-welded portion 25 was read by a phototube sensor to control the feed. Specifically, the non-welded portion 25 of the seat valve 23 is colored, and the corresponding region of the main body seat 10 overlapping the colored portion 25 is made transparent so that the non-welded portion 25 of the seat valve 23 is made the main body sheet. It was necessary to be able to read through the photocell sensor over 10. However, in the present invention, the size of the cell 14 and the distance between the cells 14 can be determined without depending on the pitch of the non-welded portion 25 of the seat valve 23, in other words, the non-welded portion of the seat valve 23 is not welded. Since the portion 25 may be located at any position on the main body sheet 10, it is no longer necessary to read the position of the non-welded portion 25 with a phototube sensor in order to adjust the pitch. As a result, continuous production is possible regardless of whether the portion of the main body sheet 10 (front main body sheet 11 or rear main body sheet 12) corresponding to the non-welded portion 25 is opaquely colored or a metal foil is used. .. Further, not only the main body sheet 10 but also other sheets such as the valve sheet 20 and the non-welded portion 25 can be freely colored or transparent.

10 Main body seat 11 Front main body seat 12 Rear main body seat 13 Sealed chamber 14 Cell 15 Common passage 16 Communication port 20 Valve seat 21 Front valve seat 22 Rear valve seat 23 Seat valve 24 Valve passage 25 Non-welded part 26 Heat seal in the flow path 27 Free end 31 Boundary heat seal 32 Outer circumference heat seal 33 Cell-to-cell heat seal 34 Outer heat seal 35 Unit boundary seal part 36 Cell-to-cell passage

Claims

A main body having a plurality of main body seats arranged so as to be stacked in the thickness direction, and a valve seat arranged to form a seat valve between the plurality of main body seats are provided.
The main body has a closed chamber in which a plurality of cells are partitioned by inter-cell seals, a boundary seal between the cells and the outside, and a communication port that connects the inside and outside of the closed chamber across the boundary seal. Prepare,
In a sealed body in which the flow of the fluid inside and outside the cell is regulated by the seat valve.
The seat valve comprises a valve passage through which the fluid flows and a non-welded portion that prevents the communication port from being closed by the boundary seal.
An outer shell is provided to prevent fluid from leaking from at least one non-welded portion, and the outer seal is connected to the inter-cell seal, or the inter-cell seal also serves as the outer seal.
A sealed body characterized in that the outer shell seal suppresses conduction between the cells through the non-welded portion.
A main body having a plurality of main body seats arranged so as to be stacked in the thickness direction, and a valve seat arranged to form a seat valve between the plurality of main body seats are provided.
The main body has a closed chamber in which a plurality of cells are partitioned by inter-cell seals, a boundary seal between the cells and the outside, and a communication port that connects the inside and outside of the closed chamber across the boundary seal. Prepare,
In a sealed body in which the flow of the fluid inside and outside the cell is regulated by the seat valve.
The seat valve comprises a valve passage through which the fluid flows and a non-welded portion that prevents the communication port from being closed by the boundary seal.
An outer shell is provided to prevent fluid from leaking from at least one non-welded portion, and the outer seal is provided around all the non-welded portions at least inside the cell, or is an inter-cell seal. Be prepared for
A sealed body characterized in that the outer shell seal suppresses conduction between the cells through the non-welded portion.
The fluid is air
A plurality of the cells are arranged along a common passage,
A plurality of the communication ports are arranged for one cell, and these communication ports are open to the common passage.
The seat valve is a check valve that allows the inflow of the air from the common passage into the cell but does not allow the outflow of the air from the cell.
The valve sheet is fixed to one of the plurality of main body sheets by the in-flow path seal, and is not fixed to the other main body sheet by the in-flow path seal.
The sealed body according to claim 1 or 2, wherein the sealed body is an air cushioning material that acts as a cushioning material by the cells inflated with the air.
It has a plurality of the closed chambers independent of each other.
The sealed body according to claim 3, wherein the common passage to the closed chamber is arranged separately or in common with respect to the plurality of the closed chambers.
The sealed body according to claim 4, wherein the pitch of the cell-to-cell seal and the cell in one of the closed chambers is different from the pitch of the cell-to-cell seal and the cell in the other closed chamber.
The width of the outer seal is larger than that of one non-welded portion and reaches the non-welded portions arranged on both sides of the one non-welded portion, according to claim 1 or 2. The sealed body described.
The sealed body according to claim 1 or 2, wherein the outer seal is provided around at least one non-welded portion and is not provided around the other non-welded portion.
The sealed body according to claim 1 or 2, wherein the inter-cell seal and the cells are provided at unequal pitches.
The sealed body according to claim 1 or 2, wherein the inter-cell seal includes an inter-cell passage, and adjacent cells are connected to each other via the inter-cell passage.
The sealed body according to claim 1 or 2, wherein the main body sheet is provided with a hole for degassing, and the hole is closed by an openable lid.