JP2014144800A - Cushioning air bag comprising opening in advance at curved zone of air chamber and producing method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cushioning air bag comprising an opening in advance at a curved zone of an air chamber and a producing method thereof.SOLUTION: There is provided an air chambers sheet in which a plurality of air chambers are formed by adhering both outside films on a plurality of longitudinal heat welding lines and a plurality of transverse heat welding lines. Both of the outside films are adhered with a heat welding method. A plurality of curved parts are formed on the plurality of air chambers or the plurality of longitudinal heat welding lines. A polygonal line substantially parallel with the transverse heat welding lines is arranged on the air chambers sheet. A plurality of nodal points are arranged on both sides of the polygonal line with an interval having a predetermined distance. The air chambers sheet is folded along with the polygonal line. Both sides of the air chambers sheet folded are adhered on a plurality of side heat welding lines with the heat welding method. The plurality of side heat welding lines extend from an edge of the air chambers sheet to the plurality of nodal points. A non heat welding section of the curved zone is formed between the plurality of nodal points and the polygonal line. Bottom surfaces are formed between the plurality of curved parts after air is injected into the air chambers sheet. An opening having a side face polygonal shape is formed by expansion of the non heat welding section of the curved zone. A supporting surface is formed on the bottom part of the opening.

Description

  The present invention relates to a structure of a bag with an air chamber and a method for manufacturing the same, and particularly to a buffer air bag in which an opening is previously provided in a bent zone of the air chamber and a method for manufacturing the same.

Currently, when packaging an article, most of the package is wrapped with a foam cushioning sheet or a polystyrene foam. However, these have problems such as poor buffering effect or environmental pollution.
In order to solve these defects of the foam cushioning sheet and the polystyrene foam, a gas packaging bag was developed. This is a sealed state through heat welding to form an air chamber, and an air inlet for air injection is provided, and after the gas is injected into the air chamber via the air inlet, the gas packaging bag Can be used as a cushioning material in the inner packaging.

  However, after inflating a general packaging bag by injecting air, the bent zone at the bottom portion does not usually have a flat shape, so that there is often a problem that the gas is compressed naturally by pressure compression. After a general packaging bag expands, the packaging bag cannot be stably left on the table surface due to problems such as protrusion of the bottom.

In view of the above-described conventional technical problems, the present invention provides the following buffer air bag.
The buffer air bag provided with openings in advance in the bent zone of the air chamber according to the present invention has a plurality of air chambers formed with both outer films bonded by a plurality of longitudinal heat welding wires and a plurality of transverse heat welding wires. Adhering both outer side films by an air chamber sheet consisting of a plurality of air chambers or a plurality of longitudinal heat welding wires, and located in the air chamber sheet, A bent line substantially parallel to the transverse heat-welding line, a plurality of nodes located on both sides of the bent line and spaced by a predetermined distance, and after bending along the bent line in the air chamber sheet Both sides of the air chamber sheet are thermally bonded and extended from one end of the air chamber sheet to a plurality of nodes, and both sides of the air chamber sheet are bent between a plurality of nodes and a folding line to form a non-thermally welded section of the zone. A plurality of side heat welding wires.
After the air is injected into the air chamber sheet, a bottom surface is formed between the bent portions of the air chamber sheet, and the non-thermal welding section of the bent zone expands to form a side polygonal opening, and the bottom of the opening A support surface is formed.

The present invention also provides a method for manufacturing a buffer air bag in which an opening is provided in advance in a bent zone of an air chamber, and a plurality of longitudinal outer heat-bonding wires and a plurality of lateral heat-welding wires are bonded to each other. A plurality of bent portions are formed in a plurality of air chambers or a plurality of longitudinal heat-welding lines. And that the air chamber sheet is provided with a middle fold line substantially parallel to the transverse heat welding line, a plurality of nodes each having a predetermined distance between both sides of the middle fold line, and along the middle fold line. Bending the air chamber sheet and adhering both sides of the air chamber sheet after being bent by a heat welding method with a plurality of side heat welding wires.
A plurality of side thermal welding lines extend from one end of the air chamber sheet to a plurality of nodes, and a non-thermal welding section of a bending zone is formed between the plurality of nodes on both sides of the air chamber sheet and the middle line, After the air is injected into the air chamber sheet, the air chamber sheet forms a bottom surface between the bent portions, and the non-thermal welding section of the bent zone expands to form a side polygonal opening. A support surface is formed at the bottom.

The present invention eliminates an acute angle through a non-sealing zone provided in advance in the side bending zone, and further uses the bottom air chamber in which the nodes of the bending zone are located between the air chamber and the bending nodes. Is adjusted to adjust the buffering effect of the zone, and at the same time, the outer box can be reduced or the air chamber can be deflated due to sharp frictional cracking.
In addition, the adjustment of the air chamber area at the peripheral edge of the triangle of the opening is used to fit the enveloping object, avoiding sharp objects at the corners, and increasing the buffering elasticity. The structure of the bottom buffer air chamber eliminates the problem of an acute angle by injecting and compressing the bottom air chamber by sealing the bag body side. Further, the buffering effect of the bending zone can be enhanced by adjusting the increase / decrease of the area of the node of the side bending zone and the air chamber of the part by the heat welding method.

  Hereinafter, the features and advantages of the present invention will be described in detail in the embodiments. The contents can be understood by a person skilled in the art to understand the technical contents of the present invention and can be implemented based on the contents, and those skilled in the art can understand the contents based on the contents disclosed in the present specification, the claims and the drawings. One can easily understand the related objects and advantages of the present invention.

It is an external view of a mode that air of the 1st example concerning the present invention is not injected. It is sectional drawing of a mode that the air of the 1st Example which concerns on this invention was inject | poured. It is an external view (1) of a mode that air of the 1st example concerning the present invention was injected. It is an external view (2) of a mode that air of the 1st example concerning the present invention was injected. It is a side view of a mode that air of the 1st example concerning the present invention was injected. It is side surface sectional drawing of a mode that the air of the 1st Example which concerns on this invention was inject | poured. It is a top view of a mode that the air of the 2nd example concerning the present invention is not injected. It is an external view (1) of the air chamber reduction | decrease of the side bend zone of this invention. It is sectional drawing of a mode that the air of FIG. 8A was inject | poured. It is an external view (2) of the air chamber reduction | decrease of the side bend zone of this invention. It is sectional drawing of a mode that the air of FIG. 9A was inject | poured. It is an external view (3) of the air chamber reduction | decrease of the side bend zone of this invention. It is sectional drawing of a mode that the air of FIG. 10A was inject | poured. It is an external view (four) of air chamber reduction of the side bend zone of this invention. It is sectional drawing of a mode that the air of FIG. 11A was inject | poured.

  A buffer air bag having an opening in a bent zone of an air chamber according to the present invention will be described with reference to FIGS.

  The air bag according to the present invention includes an air chamber sheet 200, a plurality of longitudinal heat welding wires 21, a plurality of transverse heat welding wires 22, a plurality of bent portions 4a and 4b, and non-thermal welding of a predetermined bending zone on both sides. And the area required for the air chamber of the non-thermal welding section of the predetermined reduced bending zone.

The air chamber sheet 200 is formed by heat welding with the outer films 2 and has a built-in shut-off valve that automatically stops air after air injection, and a plurality of sealed bodies are formed through heat welding to form the air chamber. An air injection passage 50 that is formed and communicated and a gas inlet for each air chamber 1 are provided. After the air is injected, the air enters the air chamber along the air injection passage 50 via each inlet 52, and a one-way shut-off valve is provided. Therefore, the air is automatically closed after the air is injected. An injection passage 50 and an air inlet 52 are formed.
The air chamber sheet 200 is provided with bent portions 4a and 4b by a heat welding method so that the air chamber 1 can be bent. The air chamber sheet 200 is bent and thermally welded on both sides thereof, and one end is provided with the entrance 11. An air-injection-type buffer air bag that can accommodate objects is formed. Air is injected into the air bag and inflated to form a U-bent air chamber bag. The bag body can be used in combination with a continuous independent shut-off valve for each air chamber or a one-way shut-off valve communicating with each air chamber.
Both outer films 2 each have a corresponding inner surface, a storage space 10 is formed between a plurality of opposing inner surfaces, and one end of the air chamber 1 has an inlet 11. Therefore, both outer films 2 are compounded together with polyesters, ethylene-propylene copolymer, polyethylene terephthalate (PET), ethylene / vinyl acetate (EVA), polypropylene (PP), nylon (Nylon), and PE. Film, biodegradable materials, and hot-melt materials such as paper coated with a polymeric material, which are not limited to these examples.

As shown in FIG. 1, the air bag sheet 200 is folded into two U-shaped air bags along the folding line M, and both sides 1b of the air bag are joined via the side heat welding wires 2a. Use as Here, both side sides 1b are preferably joined and used by a heat welding method.
When actually used, both sides 1b can be fixed by bonding or other joining methods, but the present invention is not limited to this. In other words, the bent portions 4a and 4b, the bent line M, and the non-thermal welding section 3 of the bent zone are provided in the air chamber. In other words, when the air chamber sheet 200 is folded in half along the middle folding line M from the node 31a to the node 31b, and the both sides 1b are thermally welded and joined via the heat welding wire 2a, the side in the bending zone 3 is joined. Is not heat welded.
In other words, both sides outside the non-thermal welding section 3 in the bending zone are bonded by thermal welding, and the side sides in the non-thermal welding section 3 in the bending zone are opened. Therefore, the middle folding line M is an imaginary line, and it is not necessary to bond the both outer films 1a by a heat welding method, and it is only necessary to use a middle line for folding the air chamber sheet 200 in half.

  As shown in FIG. 1, the node 31a is a start point and the node 31b is an end point, and this section is a non-thermal welding opening zone provided in advance, that is, a non-thermal welding section 3 of a bending zone.

This will be described with reference to FIGS. 2, 3 and 4. Since the side thermal welding line 2a does not thermally weld the section from the node 31a to the node 31b, after the air is injected into the air chamber sheet 200, the air is automatically stopped and bent to the air chamber 1 on the side. Since the non-thermally welded section 3 of the zone is reserved, the air chamber 1 of the zone expands to automatically form an opening 40 having a triangular air chamber.
This structure is simple, there is no acute angle where the corner chamber after air injection protrudes, it does not leak due to acute angle friction during the transportation process, and it fits with the side of the outer box, Since it has a volume reduction effect and there is a buffer space in the side triangular air chamber, the buffer effect of the zone is further improved. The nodes 31a and 31b are marks, and are not necessarily heat welding nodes.

This will be described with reference to FIGS. The two compression corner portions 4 are positioned on the plurality of outer films 1a, and when air is injected into the plurality of outer films 1a to form the air chamber 1, and when bent into a U-shape, the respective compression corner portions are at the bent portions. 4 is formed, and the distance between both outer films 1a of the portion is smaller than the distance between both outer films 1a in the unbent portion.
The non-thermal welding section 3 in the substantially bent zone forms a triangle in accordance with the position of the both side compression corners 4, and includes a bottom buffer chamber 41 having a support surface 41 a between the both side compression corners 4. In other words, after the air is injected into the air chamber sheet 200, the air chamber sheet 200 forms a bottom surface 41b between the nodes 31a and 31b, and the non-thermal welding section 3 in the bending zone expands to form a side polygon. An opening 40 is formed, and a support surface 41 a is formed at the bottom of the opening 40.
The bag body 100 can be brought into contact with and supported by the bottom buffer air chamber 41 when an article is in the storage space 10 after an article is put in from the entrance 11, and the support surface 41a of the bottom buffer air chamber 41 is contacted and supported by the table surface. A buffering action is performed, and air is injected into the plurality of outer films 1a to expand, and openings 40 are formed in the triangular zones.

This will be described with reference to FIGS. The air chamber seat 200 in the present embodiment can be provided with the closing valve 5. In this embodiment, a plurality of air inlets 52 can be formed between both inner films 53, and each air inlet 52 corresponds to one air chamber 1.
Here, the structure of the shut-off valve 5 is only given as an example, and a structure having the same effect can be provided according to actual structural needs. The present invention is not limited to this. For example, each air chamber is provided with the closing valve 5, so that one air inlet 52 is formed between the inner films 53 of the closing valve 5. A part of the shut-off valve 5 is located between the outer films 1 a, and the other part of the shut-off valve 5 is exposed from the air injection passage 50.
In the present embodiment, the two outer films 1a are preferably bonded by a heat welding method to form an air injection passage 50 to provide an air injection path.

In particular, the shut-off valve 5 includes a heat-resistant material 51 and is bonded by a heat welding method to form an air inlet 52 and communicates with the air injection passage 50. Preferably, the shut-off valve 5 is formed by bonding a plurality of inner films 53 by a heat welding method. A space between the plurality of inner films 53 and the plurality of outer films 1a is located in the air injection passage 50, and includes a plurality of heat welding openings 54 for bonding the one outer film 1a and the one inner film 53 adjacent to each other. .
When the gas is filled into the air injection passage 50, both the outer films 1a are pulled outward, and the corresponding inner films 53 are pulled outward by the respective heat welding opening / closing 54, so that the shut-off valves 5 are relatively opened and air injection is performed. After the gas in the passage 50 is filled between the plurality of outer films 1a via the shut-off valve 5, the space between the outer films 1a expands and the air chamber 1 is formed, and then the air chamber 1 is bent and then U Presents a letter shape.

A second embodiment according to the present invention will be described with reference to FIG. The difference between the present embodiment and the first embodiment is that the air chambers 1 of the present embodiment cannot be communicated with each other by being partitioned by the heat welding wire 2.
A space between one heat welding wire 2 and another heat welding wire 2 includes a pitch length, and a first distance d is also formed at a compression corner portion 4 position of the pitch length. Since the second distance D is also formed at the position of the bottom buffer chamber 41 of the length, and the first distance d is less than the second distance D, the length of the first distance d of the compression corner portion 4 is short, After the length of the second distance D of the bottom buffer air chamber 41 is long and air is injected into the air chamber 1, the compression corner portion 4 is easy to bend because the first distance d is short.
In particular, the space between the two compression corners 4 on one thermal welding line 2 includes the first pitch L1, and the non-thermal welding section 3 in the bending zone on the one thermal welding line 2 is connected to the first node 31a and the first nodal point 31a. It is located between the two nodes 31b, includes the second pitch L2, and the length of the first pitch L1 is less than the length of the second pitch L2.

  This will be described with reference to FIGS. 8A, 8B, 9A, 9B, 10A, 10B, 11A, and 11B, which are embodiments of air chamber reduction in the side bent zone. During actual use, the air chamber 1 in the side bend zone can be reduced.

When the air chamber 1 is large on the side, an overlap is formed naturally at the bent portion, resulting in an oversize of the air chamber 1 on the side, and the outer box becomes large. In order to avoid this, the disadvantage is that the air chamber 1 overlaps and becomes larger after bending by reducing the area of the air chamber 1 in the non-thermal welding section 3 of the non-sealed bending zone of the side air chamber 1. Does not occur. The non-thermal welding section 3 in the bending zone refers to the side non-thermal welding after the air chamber sheet 200 is folded in two along the middle folding line M. That is, the part where the side of the air chamber sheet 200 after folding in half extends from the node 31a to the node 31b on the other side is assumed to be non-thermal welding.
However, the two outer films 1a can be bonded to the three non-thermal welding sections of the bending zone by a thermal welding method to form the thermal welding zones 32 of various shapes. For example, a rectangular shape, a semi-elliptical shape, a triangular shape, or other irregular shapes are used.
However, since the width of the heat welding zone 32 is shorter than the width of the air chamber 1, the air chamber 1 can be inflated by injecting air through the sections before and after the heat welding zone 32. Further, the heat welding zone 32 constituting the non-thermal welding section 3 of the bending zone can be connected to the bending portions 4a and 4b, and is used for gas circulation while maintaining a space between the bending portions 4a and 4b.
In addition, in order to reduce the area of the bending zone of the air chamber 1 in the non-thermal welding section 3, the width of the thermal welding zone 32 is shorter than the width of the air chamber, and the length of the thermal welding zone 32 is the non-heat of the bending zone. It is shorter than or equal to the length of the welded section 3. The method for reducing the area of the side air chamber 1 is as follows.

  (1) This will be described with reference to FIGS. 8A and 8B. By the method of thermally welding the air chamber 1 in the section between the bent portion 4a and below of the air chamber 1 to the next bent portion 4b, the area where air can be injected is reduced, and the volume is automatically increased after the air is injected. If it decreases, the bending zone of the air chamber 1 will bend and it will have the effect of becoming small and narrow.

  (2) A description will be given with reference to FIGS. 9A and 9B. Discontinuous reduction of the bent portions 4a and 4b is formed by reducing each of the sections before and after the bent portion 4a and the bent portion 4b. The air chamber 1 from the opening to the bent portions 4a and 4b after the air injection has a wide width to a narrow width only in a predetermined section before and after each portion of the bent portions 4a and 4b. It has the advantage of a bag and does not have the disadvantage that the bent air chambers 1 overlap and become large, and the opening does not invalidate or reduce the buffering effect by installing the opening 40.

  (3) Description will be made with reference to FIGS. 10A and 10B. The other bend is based on the reduction method of the bends 4a and 4b. That is, reduction is performed from above and below the bent portions 4a and 4b to each of the predetermined side unsealed portions. In other words, air is injected between the bent portion 4a and the bent portion 4b to expand. Since the air chamber 1 of the bent portion 4a and the bent portion 4b swells without being reduced after the air is injected, the air chamber 1 has a buffering effect, and there is no disadvantage that the air chamber 1 overlaps and becomes larger due to the air chamber 1 being bent.

  (4) Description will be made with reference to FIGS. 11A and 11B. As shown in the figure, another method for reducing the bending portion 4a and the bending portion 4b is further submitted. That is, the reduction zone extends from the node 31a of the predetermined side non-sealing portion to the node 31b on the other side. In other words, the air chamber 1 of the unsealed triangular opening 40 is narrowed, and the other air chambers 1 are also maintained as they are.

  The manufacturing method of the buffer air bag which provided the opening beforehand in the bending zone of the air chamber concerning the present invention includes the following steps.

  Step 101: An air chamber sheet 200 is provided in which a plurality of air chambers 1 are formed by bonding the outer films 1a with a plurality of longitudinal heat welding wires 21 and a plurality of transverse heat welding wires 22.

  Step 102: The two outer films 1a are bonded by a heat welding method, and bent portions 4a, 4b are formed in the plurality of air chambers 1 or the plurality of longitudinal heat welding wires 21.

  Step 103: The air chamber sheet 200 is provided with a half-broken line M substantially parallel to the plurality of transverse heat welding wires 22.

  Step 104: A plurality of nodes 31a and 31b having a predetermined distance are provided on both sides of the middle broken line M.

  Step 105: The air chamber sheet 200 is bent along the middle fold line M.

  Step 106: Adhering the both sides 1b of the air chamber sheet 200 after being bent by the heat welding method with the plurality of side heat welding wires 2a, and the plurality of side heat welding wires 2a from one end of the air chamber sheet 200 The non-thermal welding section 3 of the bending zone is formed by extending to the node 31a, the node 31b and the middle broken line M.

  Step 107: After the air is injected, a buffer bag 100 having a non-acute triangular opening on the side is formed in the opening 40 of the bent zone.

  After the air is injected into the air chamber sheet 200, the air chamber sheet 200 forms a bottom surface 41b between the bent portions 4a and 4b, and the non-thermal welding section 3 of the bent zone expands to open the side polygonal opening 40. Further, a support surface 41 a is formed at the bottom of the opening 40.

  Air is injected into both outer films 1a and expands, and both compression corners 4 are formed in both outer films 1a. A triangular opening 40 is formed at the non-thermal welding section 3 and both compression corners 4 in the substantially bent zone. Is formed, and a bottom buffer air chamber 41 is formed between both compression corners 4 to buffer external articles via the bottom buffer air chamber 41.

  After the step of providing both the outer films 1a in step 101, provision of the shut-off valve 5 is further included. The structure of the shutoff valve 5 is as described above, and repeated description is omitted here. Gas is filled into the air injection passage 50, the outer films 1a are pulled outward, the inner films 53 are pulled outward by a plurality of heat welding openings 54, and the shut-off valve 5 is opened, and the gas in the air injection passage 50 is closed. A plurality of outer films 1 a are filled via the valve 5.

  In the step of providing a plurality of heat welding wires 2 in step 102, a pitch is provided between the plurality of longitudinal heat welding wires 21. In other words, the distance d at the compression corner 4 is less than the distance D of the bottom buffer chamber 41 (as shown in FIG. 7).

  Since the other explanation about the manufacturing method of the buffer air bag in which the opening is provided in advance in the bent zone of the air chamber is the same as the contents related to the buffer air bag, the description thereof is omitted here.

The air bag of this embodiment puts an object into the internal space through the entrance, supports the surface of the object with a plurality of bottom buffer air chambers, and has a buffering effect on the object. It also has a protective effect by wrapping the outside. The unsealed section of the bent zone on the predetermined side and the air chamber adjust the side buffer effect by reducing the predetermined area of the bent zone.
After the air is injected into the buffer air bag, the side corner corner triangle is automatically formed, one side is flat and non-acute, the other side can stably contact the table surface, and the air bag is Triangular air chambers formed by inflating with air injected without falling on the table surface belong to the adjustment of the corner buffer, help to reduce the outer box space, and achieve the purpose of reducing the fare.

100 Bag 200 Air chamber sheet 1 Air chamber 1a Outer film 1b Side 10 Storage space 11 Entrance 21 Longitudinal heat welding wire 22 Lateral heat welding wire 2a Side heat welding wire 3 Non-thermal welding section 31a / 31b in the bending zone Node 32 Thermal welding zone 4 Compression corner 4a / 4b Bend 40 Opening 41 Bottom buffer air chamber 41a Support surface 41b Bottom 5 Shut-off valve 50 Air injection passage 51 Heat-resistant material 52 Air inlet 53 Inner film 54 Thermal welding opening / closing D No. 1 distance d 2nd distance L1 1st pitch L2 2nd pitch M Middle broken line

Claims (10)

Providing an air chamber sheet in which a plurality of air chambers are formed by bonding both outer films with a plurality of longitudinal heat welding wires and a plurality of transverse heat welding wires;
Adhering the outer film by a heat welding method, forming a plurality of bent portions in the air chamber or the longitudinal heat welding wire,
A folding line substantially parallel to the transverse heat-welding line is provided in the air chamber sheet;
A plurality of nodes each having a predetermined distance between both sides of the middle line;
Bending the air chamber sheet along the middle fold line;
Adhering both sides of the air chamber sheet after being bent by a heat welding method with a plurality of side heat welding wires,
The side heat welding line extends from one end of the air chamber sheet to the node, and a non-thermal welding section of a bending zone is formed between the node on both sides of the air chamber sheet and the bent line, After the air is injected into the air chamber sheet, the air chamber sheet forms a bottom surface between the bent portions, and the non-thermal welding section of the bent zone expands to form a side polygonal opening, and A support surface is formed at the bottom of the opening,
A method of manufacturing a buffer air bag in which an opening is provided in advance in a bent zone of an air chamber.   The air of claim 1, further comprising providing at least one shut-off valve that is bonded by a heat welding method and is positioned between the outer films and a portion is located between the air chambers. A method for manufacturing a buffer air bag in which an opening is previously provided in a bending zone of a chamber.   The outer film is bonded by a heat welding method, an air injection passage is formed on a side of the air chamber, the air injection passage communicates with the air chamber, the shut-off valve includes both inner films, and the inner film A heat-resistant material is provided between the films, and the outer film and the inner film are bonded by a heat welding method to form at least one air inlet, which is used for communication between each air chamber and the air injection passage. The manufacturing method of the buffer air bag which provided the opening beforehand in the bending zone of the air chamber of Claim 2 characterized by the above-mentioned.   The opening in the bending zone of the air chamber according to claim 1, wherein the side heat welding line is positioned in the two longitudinal heat welding lines on the outermost side of the air chamber sheet. A method for manufacturing the provided buffer air bag.   In the outer film, at least one heat welding zone is formed by bonding to a non-thermal welding section portion of the bending zone by a heat welding method, and the width of the heat welding zone is shorter than the width of the air chamber, 2. The area of the non-thermal welding section of the bending zone of the air chamber is reduced by the length of the welding zone being shorter than or equal to the length of the non-thermal welding section of the bending zone. A method of manufacturing a buffer air bag in which an opening is provided in advance in the bending zone of the air chamber. An air chamber sheet comprising a plurality of air chambers formed with both outer side films bonded with a plurality of longitudinal heat welding wires and a plurality of transverse heat welding wires;
Bonding the outer film by a heat welding method, a plurality of bent portions formed on the air chamber or the longitudinal heat welding wire,
A folding line located in the air chamber sheet and substantially parallel to the transverse heat-welding line;
A plurality of nodes located on both sides of the middle line, and having a predetermined distance from the middle line;
The air chamber sheet is thermally bonded to both sides of the air chamber sheet after being bent along the folding line, and extends from one end of the air chamber sheet to the nodes, and the nodes on both sides of the air chamber sheet. And a plurality of side thermal welding lines in which a non-thermal welding section of a bending zone is formed between the bent line,
After air is injected into the air chamber sheet, a bottom surface is formed between the bent portions of the air chamber sheet, and a non-thermal welding section of the bent zone is expanded to form a side polygonal opening, A support surface is formed at the bottom of the opening,
A shock-absorbing air bag in which an opening is previously provided in the bending zone of the air chamber.   7. The air chamber bending zone according to claim 6, further comprising at least one shut-off valve that is bonded by a heat welding method and is positioned between the outer films, and a part thereof is located between the air chambers. Buffer air bag with an opening provided in advance   The outer film is bonded by a heat welding method, further formed on the side of the air chamber, further including an air injection passage communicating with the air chamber, the shut-off valve includes both inner films, and between the inner films The outer film and the inner film are bonded by a heat welding method to form at least one air inlet used for communication between each air chamber and the air injection passage. The buffer air bag which provided the opening beforehand in the bending zone of the air chamber of Claim 6.   The opening in the bending zone of the air chamber according to claim 6, wherein the side heat welding line is located in the two longitudinal heat welding lines on the outermost side of the air chamber sheet. Buffer air bag provided.   The outer film is bonded to a non-thermal welding section portion of the bending zone by a thermal welding method to form at least one thermal welding zone, and the width of the thermal welding zone is shorter than the width of the air chamber, and the thermal welding is performed. The area of the air chamber in the non-thermal welding section of the bent zone is reduced by the length of the zone being shorter than or equal to the length of the non-thermal welding section of the bent zone. A shock-absorbing air bag in which an opening is provided in advance in the bending zone of the air chamber.

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