JP2002053001A - Air bag folding device and method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and orderly fold an air bag for an occupant on a front passenger seat. SOLUTION: An opening 86 of a bag-shaped air bag 22 is held by an opening holding part 105 of a working bench. A lower end of this side is held by a pair of first clamps 111 mounted on a retainer with an accommodatable width W. Then an upper end of this side is pulled by a hand to form a triangle with a side face part 84. Then a part of the opening 86 side is folded in flat while inwardly folding the side face part 84 to form a first expanded part 121. Then a remained part is folded in flat to form a second expanded part 122 upwardly expanded, and a third expanded part 123 downwardly expanded. Further the second expanded part 122 is folded in bellows, and the third expanded part 123 is folded into the rolled shape.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for folding an airbag and a method for folding an airbag, for example, for a passenger in a passenger seat mounted on an instrument panel of an automobile.

[0002]

2. Description of the Related Art Conventionally, for example, an airbag device for a passenger in a passenger seat provided on an instrument panel of an automobile is known. This airbag device includes a box-shaped retainer, and accommodates an inflator for injecting gas and an airbag folded into a predetermined shape inside the retainer. The retainer has an opening that opens toward a windshield or the like. The opening is covered by a breakable opening, and is fixed to a vehicle body-side member via a bracket. . In the event of a car collision, the airbag is inflated by injecting gas from the inflator, and the pressure of this inflation ruptures the cover body at a predetermined tear line to form a protrusion, and the airbag projects from the protrusion. It expands and deploys to reduce the impact on the occupants.

[0003] In order to improve the deployment characteristics of such an airbag, for example, Japanese Patent No. 2709024, Japanese Patent No. 30000312, and Japanese Patent No. 265275.
As described in Japanese Patent No. 1 or Japanese Patent No. 3034731, the airbag is folded into a flat plate shape extending in two directions from the opening of the airbag, and the flat portions are opened. There is known a configuration in which the fold is folded in a bellows shape or the like toward a part and stored in a retainer.

[0004] Among them, in the configuration described in Japanese Patent No. 2709024 or Japanese Patent No. 30000312, the airbag can be spread flat on a plane and can be relatively easily folded. In the configuration described in Japanese Patent No. 3034731, the airbag is sewn into a three-dimensional shape forming a quadrangular pyramid when deployed.
It is not always easy to fold it neatly, and it is necessary to perform a complicated operation, such as folding only one side of the base fabric into a flat shape.

[0005]

As described above, in the conventional configuration, it is not always easy to fold an airbag formed in a three-dimensional shape neatly, and there is a problem that a complicated operation is required. ing.

An object of the present invention is to provide an airbag folding apparatus and an airbag folding method capable of easily and neatly folding an airbag.

[0007]

According to a first aspect of the present invention, there is provided an airbag folding apparatus which folds a bag-shaped airbag having an opening into an airbag storage portion having a predetermined width. A folding device, comprising: an opening holding portion for holding the vicinity of the opening of the airbag at the predetermined width dimension; and an opening near the opposite end separated from the opening holding portion at the predetermined width dimension. And a first clamp for holding.

In this configuration, the vicinity of the opening of the airbag and the vicinity of the end opposite to the body separated from the opening holding portion are held in a predetermined width by the opening holding portion and the first clamp, respectively. Then, while folding both sides of the airbag inward, a portion continuous to the opening of the airbag is folded into a flat plate shape as a first deployment portion, while holding the first deployment portion folded into the flat plate shape, While the portions on both sides are folded inward, the portion connected to the distal end side is folded into a flat plate extending in two directions to form a second developed portion and a third developed portion, and from this state, the second developed portion and the third developed portion Is folded toward the first deploying portion, and the first deploying portion is appropriately folded, so that the airbag can be easily and orderly folded even by a manual operation. The structure of the folding device is simplified, and the manufacturing cost can be reduced.

According to a second aspect of the present invention, there is provided an airbag folding device.
2. The airbag folding device according to claim 1, further comprising a second clamp that holds an intermediate position between the opening holding portion and the first clamp with a predetermined width.

[0010] In this configuration, the second clamp clamps an intermediate portion between the opening holding portion and the first clamp in a state where the portion continuous to the opening of the airbag is folded into a flat shape to form the first deployed portion. , The airbag can be easily and orderly folded even by hand.

According to a third aspect of the present invention, there is provided a folding device for an airbag,
The airbag folding device according to claim 2, wherein the airbag includes a pair of side portions that can be deployed in a substantially triangular shape that expands from the vicinity of the opening, and the opening holding portion and the first clamp are respectively provided. The vicinity of the corner of the triangle is retained.

In this configuration, since two corners of the side portion of the substantially triangular airbag are held by the opening holding portion and the first clamp, the other corner is held by a manual operation or the like. The airbag is easily and orderly folded.

According to a fourth aspect of the present invention, there is provided a method of folding an airbag.
An airbag folding method for folding a bag-shaped airbag having an opening, and a pair of side portions on both sides expanding from the vicinity of the opening so as to be stored in an airbag storage portion having a predetermined width. A setting step of holding the vicinity of the opening of the airbag and the vicinity of the opposite end separated from the opening holding portion at the predetermined width dimensions, respectively, A first folding step of folding a portion continuous with the opening into a flat plate shape to form a first developing portion; and, while holding the first developing portion, folding the side portions on both sides inward while forming the first developing portion. (1) a second folding step in which a portion continuous to the distal end side of the first developing section is folded into a flat plate shape extending in two directions to form a second developing section and a third developing section; The third fold which folds to 1 deployment part side It is obtained by including a step.

In this configuration, substantially the entirety of the airbag is easily folded to a predetermined width, and the airbag is easily and neatly folded so that the airbag can be stored in an airbag storage section having a predetermined width.

[0015] A method for folding an airbag according to claim 5 is as follows.
5. The method of folding an airbag according to claim 4, wherein the second folding step folds the second deployed portion in the same plane as the first deployed portion, and folds the third deployed portion on the first deployed portion. is there.

In this configuration, substantially the entirety of the airbag is easily folded into a flat plate having a predetermined width, and the airbag is easily and orderly folded so that the airbag can be stored in the airbag storage section having the predetermined width.

According to a sixth aspect of the present invention, there is provided a method of folding an airbag.
In the method for folding an airbag according to the fourth aspect, the second folding step is to overlap the second deployed portion and the third deployed portion with each other and to fold them in the same plane as the first deployed portion.

In this configuration, substantially the entire airbag is easily folded into a flat plate having a predetermined width, and the airbag is easily and orderly folded so that the airbag can be stored in an airbag storage portion having a predetermined width.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an airbag folding apparatus and an airbag folding method according to the present invention will be described below with reference to the drawings.

In FIG. 5, reference numeral 1 denotes an airbag device, and the airbag device 1 is an instrument panel as an installation portion located in front of an occupant 3 which is a protected object seated on a passenger seat 2 of an automobile. 5 and constitutes an airbag device 1 for a passenger in the passenger seat. In the following,
Forward (direction of arrow F shown in FIG. 5), rear (arrow B shown in FIG. 5)
Direction) and the up-down direction will be described in accordance with the front-rear direction and the up-down direction of the vehicle when the airbag device 1 is attached to the vehicle, respectively. The instrument panel 5 has a curved surface and extends rearward, and is opened at the substantially planar upper surface 5a to form an airbag device opening 6. That is, the opening 6 for the airbag device is arranged to face the inclined windshield 8 located above the instrument panel 5.

The airbag device 1 includes a retainer 12 as a case body, and the retainer 12 has a substantially box shape with an upper side serving as an opening 14. The inside of the retainer 12 is vertically divided by a mid retainer 15 serving as a partition member, and a substantially cylindrical inflator storage portion 17 that is located on the lower side and has axial directions in both sides, and an airbag storage portion that is located on the upper side. A part 18 is formed. An inflator 21 for injecting gas is stored in the inflator storage unit 17, and a bag-shaped airbag 22 is stored in the airbag storage unit 18 located above by folding the bag into a predetermined shape as described later. At the same time, the protrusion 14 is covered with a cover body (lid) 23 that can be broken.

The retainer 12 is formed by bending or welding a metal plate, and is arranged with the protrusion 14 upward and slightly rearward along the instrument panel 5. A bracket (not shown) is fixed to the retainer 12 by welding or the like at the lower end side and the near side of the inflator storage section 17, and a bolt fixed to the bracket is attached to the inside of the instrument panel 5 using a nut. To the Reinforce as a member to be attached, and retainer
12, that is, the airbag device 1 is fixed to the vehicle body.

The airbag housing portion 18 is formed with a mounting hole such as a circular hole or a long hole on the front and rear surfaces on the lower end side. Further, the airbag housing 18 has a plurality of cover mounting claws having a substantially C-shaped cross section on the front and rear outer surfaces on the upper end side.
A cover attachment body integrally formed with 57 is fixed by welding or the like.

On the other hand, as shown in FIGS. 3 to 5, the mid retainer 15 is formed by, for example, bending a metal plate to
In addition, a mounting plate portion 62 is formed in which the front and rear sides of the substrate portion 61 are once bent downward and further inclined upward. Further, a plurality of gas insertion ports 65 are formed in the substrate section 61. Further, from the front and rear mounting plate portions 62, a plurality of stud bolts 67, in this embodiment, four stud bolts 67 are integrally fixed to each other, and are protruded inclining downward. Are screwed together.

The inflator 21 has a cylinder-shaped main body. A gas outlet is provided at one end of the main body, and a fixing receiving portion is provided at the other end of the main body. The main body has a gas generation chamber containing an igniter and a propellant inside, or a gas storage chamber filled with compressed gas and a gas generation chamber filled with a solid gas generating agent can be broken. It is configured as a so-called hybrid inflator arranged via a simple partition. The gas outlet has a plurality of gas injection holes formed on the peripheral surface, and a bolt portion protrudes from an end surface thereof. Are screwed together.
Further, a lead wire with a connector connected to the tip is led out from the end face of the fixing receiving portion.

Then, the airbag 22 is formed by sewing a plurality of base cloths, for example, two base cloths, and as shown in FIG. 6, a substantially quadrangular pyramid, that is, from the front end, ie, the base end, to the occupant 3. It has a bag-like shape whose width and thickness are enlarged toward the substantially square facing surface 80 facing the upper plate 81 and the lower plate.
82 and a pair of side surfaces 84, 84 on both sides, and a rectangular opening 86 is provided near the front end of the lower plate 82. Further, on the front and rear sides of the opening 86, as shown in FIG. 4, circular mounting holes 87 are formed at predetermined intervals.
Further, an exhaust port (not shown) is formed in the airbag 22 at a position slightly separated from the opening 86.

Further, a cover body (airbag cover) 23
Is a substantially flat upper plate portion 91 provided substantially flush with the instrument panel 5, front and rear leg portions 92 projecting downward from the lower surface of the upper plate portion 91, The claws and the like disposed further outside of the 92 are integrally injection-molded with a synthetic resin such as a thermoplastic elastomer. On the lower surface of the upper plate portion 91, a tear line 95, which is thinner than other portions and is easily broken, is formed in a substantially H-shaped plane. In addition, locking holes are formed in the leg pieces 92 at predetermined intervals in both side directions.

When assembling the airbag device 1, first, the stud bolt 67 of the mid-retainer 15 is inserted into the circular mounting hole 87 of the airbag 22 from the inside, and the airbag 22 is inserted into the mid-retainer 15. Is attached, and the airbag 22 is folded into a predetermined shape. Then, insert this mid retainer 15 inside the retainer 12, insert the front and rear stud bolts 67 into the mounting holes of the retainer 12, screw the nuts from the outside via the reinforcing plate, and tighten them,
By mounting the mid retainer 15 inside the retainer 12, the folded airbag 22 is
Is stored in. In this state, the periphery of the opening 86 of the airbag 22 is sandwiched and fixed between the mid retainer 15 and the retainer 12, and the opening 86 of the airbag 22 is
Is covered. Subsequently, the cover body 23 is put on the projecting opening 14, and the cover mounting claws 57 of the retainer 12 are locked and fixed to the locking holes of the leg portions 92 of the cover body 23, and the cover body 23 is positioned above the airbag 22. Cover the projecting opening 14 located at Further, the inflator 21 is hermetically mounted in the inflator storage portion 17 of the retainer 12, thereby configuring the airbag device 1.

In the airbag apparatus 1 thus configured, the bolts of the bracket are fastened and fixed to the support plate provided on the reinforce with nuts, and are fixed to the vehicle body. In this state, the claw portion provided on the cover body 23
It is engaged with the back side of the instrument panel 5 or the like.

In the airbag apparatus 1 configured as described above, in the event of a collision of an automobile, a controller (not shown) normally detects this impact, that is, a sudden deceleration exceeding a predetermined value, and activates the inflator 21. This inflator
Inject an inert gas such as nitrogen gas from 21. Then, this gas passes through the gas insertion port 65 of the mid retainer 15, flows into the airbag 22, and
22 is expanded and deployed. Then, the airbag 22 presses the cover body 23 from the inside, and the upper plate 91 of the cover body 23 is pressed.
Is cut along the tear line 95 to form a projecting opening of the airbag 22. Subsequently, the airbag 22 protrudes from the protruding opening, and inflates and deploys along the windshield 8 as shown by the imaginary line in FIG. 5 to reduce the impact applied to the occupant 3. The occupant 3 collides with the airbag device 1 when the airbag 22 is inflated and deployed once, for example, in the event of a small impact that does not satisfy the conditions under which the inflator 21 operates, or in a collision, for example. In such a case, the retainer 12 and the like of the airbag device 1 are deformed, and the impact received by the occupant 3 is reduced.

Next, a method of folding the airbag 22 will be described.

First, a folding device used in the folding step
As shown in FIG. 1, the work 101 includes a work table 103 provided with a work surface 102 which is inclined so as to become lower toward the near side. A cylinder (not shown) as driving means is arranged inside the worktable 103, and is operated by operating means such as a switch (not shown) as operating means.

On the back side of the work surface 102, there is provided an opening holding portion 105 having a lock mechanism into which the mid retainer 15 to which the airbag 22 is attached is inserted and held so as to be detachable. In addition, a pair of first clamps 111 arranged via a predetermined width W is provided on the near side of the work surface 102.
And a pair of second clamps 112 disposed between the opening holding portion 105 and the first clamp 111 via the same predetermined width dimension W as the first clamp 111. I have. Each of the clamps 111 and 112 is
The rod includes a rod 115 that is arranged perpendicular to the cylinder 102 and driven forward and backward by a cylinder, and a block-shaped clamp portion 116 attached to the tip of the rod 115. Each of the clamps 111 and 112 is driven by operating a switch, and the clamp portion 116 is driven to advance and retreat with respect to the work surface 102, thereby positioning and holding the base fabric of the airbag 22 between the work surface 102 and the clamp. I can do it.

Next, a process of folding the airbag 22 using the folding device 101 will be described with reference to FIGS.

First, in the initial state, each of the clamps 111, 112
Is raised, and the clamp portion 116 is separated from the work surface 102. Then, in this state, the mid retainer 15 to which the airbag 22 is attached as shown in FIG. 3A is inserted into the opening holding portion 105, and is held by the lock mechanism. further,
The first clamp 111 is lowered to sandwich and hold two predetermined corners C at the front end of the base cloth of the airbag 22. The corner C is a lower side on the work surface 102, but is an upper side when the airbag device 1 is installed in an automobile.

Next, the operator grasps the upper two predetermined corners B at the front end of the base cloth of the airbag 22 with his / her hand and pulls it upward. In this state, as shown in FIG.
Assuming that the end on the back side held by the
The side portions 84 on both sides of the 22 have a substantially triangular shape with vertices A, B, and C.

Then, from this state, while folding the side portions 84 on both sides inward, the operator moves the portion on the back side of the predetermined portion D of the airbag 22, that is, the portion on the opening 86 side, on the work surface 102 by a predetermined width. It is folded into a flat plate of dimension W, and the second clamp 11
Lower 2 and hold. In this state, as shown in FIG. 1B, a portion between the corner portion A and the predetermined portion D becomes a cylindrical first developing portion 121 communicating with the opening 86.

Further, from this state, the portion on the front side of the predetermined portion D is also folded into a flat plate having a predetermined width W on the work surface 102 while folding the side portions 84 on both sides inward. As shown in c), a second developing portion 122 extending from the predetermined portion D to the upper side, that is, the corner B side, and a third developing portion 123 extending from the predetermined portion D to the lower side, that is, the corner C side are formed.
In the configuration shown in FIG. 1 (c), the upper corner B is
The figure shows a state where it is folded so as to overlap with
As shown in FIGS. 3B and 4A, it is also possible to fold the corner B so as to overlap the corner C on the near side.

Next, as shown in FIGS. 2 (a) and 2 (b), the operator uses a flat jig or the like having a predetermined width to move the second developing portion 122 toward the predetermined portion D in a bellows shape. Fold in.

Further, as shown in FIG. 2 (c), the portions where the clamps 111 and 112 are raised and released are released, and the first developing portion 121 is moved to the second developing position so that the subsequent work can be easily performed. Part 1
After the third developing portion 123 is lifted upward by slightly wrapping it around 22, using a flat jig having a predetermined width, the third developing portion 123 is moved to the predetermined portion D as shown in FIG. Fold it in a roll shape. 3 (c) and 4 (b) show the second developing unit.
A state where the first developing unit 121 wound around 122 is virtually extended is shown.

Then, as described above, the second developing section 122 and the third developing section 123 are gathered at the predetermined section D at the tip of the first developing section 121, and the gathering section is in the state shown in FIGS. ),
By wrapping the first deploying portion 121 around the outer periphery of the second deploying portion 122 and the third deploying portion 123, the folding process of the airbag 22 is completed.

The airbag device 1 having the airbag 22 folded in this manner has the second deploying portion 122 folded in a bellows shape in a roll shape on the rear side, that is, the front side of the occupant 3, that is, below. The folded third deployment portion 123 is installed on the instrument panel 5 of the automobile such that the third deployment portion 123 faces the front side, that is, the windshield 8 side.

When gas is supplied from the opening 86 to the airbag 22 folded in this way, first, the first deploying portion 121 is deployed so as to be rewound, and the second deploying portion 122 and the third The cover 23 is pressed while the unfolded portion 123 remains in a lump, and the tear line 95 is broken. Next, the gas is supplied to the second developing portion 122 and the third developing portion 123 which protrude from the cover body 23, that is, the retainer 12, and are developed. At this time, the second deployment portion 122 folded in a bellows shape has a small deployment resistance and is deployed more quickly than the third deployment portion 123 folded in a roll shape, so that the trunk of the occupant 3 can be quickly restrained and protected. It has become.

As described above, according to the present embodiment, when the airbag 22 is deployed, the second deployed portion is
Since the 122 and the third developing portion 123 directly press the cover body 23 to break the tear line 95, a plurality of portions folded in a plate shape are simultaneously expanded vertically from the initial stage. The tearing force is concentrated without dispersing the pressing force of the
Can be efficiently deployed.

The airbag 22 is provided with the windshield 8.
When the airbag 22 is deployed, the deployment resistance is smaller than that of the roll-shaped side when the airbag 22 is deployed. Side deploys more quickly, first the torso side deploys quickly to hold the torso of the occupant 3, and then the windshield 8 side deploys, so that the airbag 22 can be easily moved to the occupant 3 as desired. Can be deployed in a state.

Further, a quadrangular pyramid-shaped airbag or the like tends to have a slight wrinkle (extra portion) on a side surface when trying to fold it into a flat plate shape, but according to the present embodiment, the airbag 22 is folded. At this time, for example, the quadrangular pyramid-shaped airbag 22 is once made into a substantially triangular shape in a side view by a preliminary folding step completed by pulling a predetermined vertex, and FIG.
As shown in (c), it can be easily and neatly folded into a flat plate having a width W that can be stored in the retainer 12.

Further, the folding device 101 determines that the two vertices of the triangle
Since the positions are held, the operator can easily make the airbag 22 triangular. In addition, folding device 10
1 includes a work table 103 provided with a work surface 102 which is inclined downward toward the front side, and the work surface 102 has an opening holding portion 10
Since the first and second clamps 111 and 112 provided with 5 and the clamp portion 116 which moves forward and backward are arranged, the workability of the folding work can be easily improved.

Further, the folding apparatus 101 does not require a large number of folding plates for folding the airbag into a bellows or a mechanism for inflating the airbag by pressurizing the airbag, so that the structure is simple and the manufacturing cost can be reduced.

In the above-described embodiment, the airbag 22 has the lower second developing portion 122 formed in a bellows shape and the upper third developing portion 123 folded in a roll shape. However, the present invention is limited to this configuration. Instead of, for example, as shown in FIG.
Each of the unfolding portions 122 and 123 can be folded in a roll shape. In addition, any of the unfolded portions has a bellows shape, or
One or both of the unfolded portions can be folded in a substantially wave shape by compressing the unfolded portion toward the predetermined portion D side.

In the above embodiment, the airbag
After forming the triangle 22 into a triangular shape, first, as shown in FIGS. 1B and 1C, the first developing portion 121 is folded into a flat plate shape, and the second clamp 1
The folded shape was kept at 12, but it is not limited to this configuration,
For example, as shown in FIG. 8A, the side portions 84 on both sides of the airbag 22 are made into a substantially triangular shape having vertices A, B, and C, and as shown in FIG. While folding the side surface portion 84 inward, the central portion of the facing surface 80, that is, the predetermined portion D
Is folded toward the corner A at the front end, and as shown in FIG. 8C, the second developed part 122 and the third developed part 123 are formed so as to overlap each other, and are continuously formed on the developed parts 122 and 123. The first development part 121 can be formed.

Also, in a state where the second developing portion 122 and the third developing portion 123 are formed so as to overlap each other, FIGS.
As shown in (d), the second expanding portion 122 and the third expanding portion 123 are sequentially folded toward the predetermined portion D, and the airbag 22 is folded. Note that, in the embodiment shown in FIG. 9, both the second expanding portion 122 and the third expanding portion 123 are folded in a bellows shape, but similarly to the configuration shown in FIGS. It is also possible to fold the second developing portion 122 on the side in a roll shape and fold the lower third developing portion 123 in a bellows shape.

In each of the above-described embodiments, the second developing portion 122 and the third developing portion 123 extending in two directions are formed to have the same length dimension, and are formed in different length directions. , The predetermined portion D is shifted from the center, and a desired development shape and development characteristics can be easily obtained.

In the above-described embodiment of the folding apparatus, the part that is manually performed by the operator can be appropriately performed by a machine.

In each of the above embodiments, the airbag device 1 provided in the instrument panel 5 for the passenger in the passenger seat has been described. However, the present invention is not limited to the airbag device provided in the door panel and the back surface of the front seat. The present invention can be applied to various airbag devices, such as an airbag device for a rear seat provided in a vehicle.

[0055]

According to the airbag folding apparatus of the first aspect, the airbag can be easily and orderly folded even by manual operation. The structure of the folding device can be simplified, and the manufacturing cost can be reduced.

According to the airbag folding device of the second aspect, in addition to the effect of the first aspect, in addition to the effect of the first aspect, the portion continuous to the opening of the airbag is folded into a flat plate shape to form the first deployed portion. By holding the intermediate position between the opening holding portion and the first clamp by the second clamp, the airbag can be easily and orderly folded even by a manual operation.

According to the airbag folding device of the third aspect, in addition to the effect of the second aspect, the two corners of the side portion of the airbag which can be deployed in a substantially triangular shape are formed by the opening holding portion and the first portion.
The airbag can be easily and orderly folded by holding the other corner by hand work or the like because it is held by the clamp.

According to the method for folding an airbag according to the fourth aspect, substantially the entirety of the airbag is easily folded to a predetermined width, and the airbag can be stored in an airbag storage portion having a predetermined width. Folds easily and neatly.

According to the method for folding an airbag according to the fifth aspect, in addition to the effect according to the fourth aspect, substantially the entirety of the airbag can be easily folded into a flat plate having a predetermined width. The airbag can be easily and neatly folded so that it can be stored in the airbag storage section.

According to the method for folding an airbag according to the sixth aspect, in addition to the effect according to the fourth aspect, substantially the entirety of the airbag can be easily folded into a flat plate having a predetermined width. The airbag can be easily and neatly folded so that it can be stored in the airbag storage section.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a folding step showing one embodiment of an airbag folding device of the present invention.

FIG. 2 is an explanatory view of a folding step of the airbag.

FIG. 3 is an explanatory diagram of a folding step of the airbag.

FIG. 4 is an explanatory view of a folding step of the airbag. (a) is a II sectional view of FIG. 3 (b), (b) is a II-II sectional view of FIG. 3 (c), (c) is a step following (b), and (d) is a step following (c).

FIG. 5 is an explanatory diagram of an airbag device including the airbag.

FIG. 6 is a perspective view showing a state where the airbag is deployed.

FIG. 7 is a perspective view showing another embodiment of the folding method of the airbag.

FIG. 8 is an explanatory view showing still another embodiment of the method for folding the airbag.

FIG. 9 is an explanatory view showing still another embodiment of the folding method of the airbag.

[Explanation of symbols]

 18 Airbag storage part 22 Airbag 84 Side part 86 Opening 101 Folding device 105 Opening holding part 111 First clamp 112 Second clamp 121 First development part 122 Second development part 123 Third development part A, B, C corner

Claims (6)

[Claims] 1. An airbag folding apparatus for folding a bag-shaped airbag having an opening into an airbag storage section having a predetermined width so that the airbag can be stored in the airbag storage section. An airbag comprising: an opening holding portion that holds the opening at a predetermined width; and a first clamp that holds the vicinity of the opposite end separated from the opening holding portion at the predetermined width. Folding device. 2. The airbag folding device according to claim 1, further comprising a second clamp for holding an intermediate position between the opening holding portion and the first clamp with a predetermined width. 3. The airbag has a pair of side portions that can be deployed in a substantially triangular shape that expands from the vicinity of the opening, and the opening holding portion and the first clamp respectively hold the vicinity of a corner of the triangle. The folding device for an airbag according to claim 2, wherein 4. A foldable airbag which folds a bag-shaped airbag having an opening and a pair of side surfaces on both sides expanding from the vicinity of the opening so as to be stored in an airbag storage portion having a predetermined width. A method for holding the vicinity of the opening of the airbag and the vicinity of the opposite end separated from the opening holding portion at the predetermined width, respectively, and folding the side portions on both sides inward. A first folding step of folding a portion of the airbag that is continuous with the opening into a flat shape to form a first deployment portion, and holding the first deployment portion with the side portions on both sides inward. A second folding step of folding a portion continuous to the distal end side of the first development section into a flat plate extending in two directions to form a second development section and a third development section while folding the second development section and the third development section; The developing unit is on the first developing unit side Folding method of the airbag, characterized by comprising a third folding step folding. 5. The method according to claim 4, wherein in the second folding step, the second developed portion is folded in the same plane as the first developed portion, and the third developed portion is overlapped and folded with the first developed portion. How to fold the airbag. 6. The method according to claim 4, wherein in the second folding step, the second deployed portion and the third deployed portion are overlapped with each other and folded in the same plane as the first deployed portion. .