JP2003306117A - Airbag - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an airbag capable of compactly keeping an airbag body in a wrapping area by a simple wrapping action. <P>SOLUTION: The airbag 10 comprises an airbag body 11, and a plurality of breakable wrapping strings 22 for preventing folding looseness. The airbag body 26 made to be in a generally rod shape by being folded comprises wrapping areas 27A, 27B blade-winding the wrapping string 22. The wrapping areas 27A, 27B are structured by arranging a uniting portion 29b at end portions 27Ab, 27Ba so as to enable preventing the plurality of wrapping strings 22 from getting loose. The uniting portion 29b is formed by winding blade-wound wrapping string 22 without displacing in an axial direction X of the folded airbag body 26. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an airbag for a head protection airbag device mounted on a vehicle. More specifically, the airbag according to the present invention is provided with an airbag body and a breakable collapsible member. And a wrapping material. This airbag body is folded and stored around the opening on the inside of the vehicle in the vehicle body, and is expandable and inflatable so as to cover the opening on the inside of the vehicle when inflating gas flows in, and after being folded, wrapping is performed. It is made of rolled material.

[0002]

2. Description of the Related Art Conventionally, an airbag for a head protection airbag device of this type is disclosed in JP-A-11-32153.
As described in Japanese Patent Laid-Open No. 2 and the like, the folded airbag body is wrapped with a wrapping material such as a tape material for preventing collapse. This is because without such a wrapping material, after the airbag body is folded, the springback, which causes the folds to restore and become bulky,
This is because the folded state of the airbag body collapses and the airbag cannot be mounted on the vehicle.

However, the conventional wrapping material is wound around the axial direction of the airbag body so as to be orthogonal to the axial direction of the airbag body which is folded into a substantially rod shape.
Then, the winding position is a plurality of positions and is intermittently arranged along the axial direction of the folded airbag body.

That is, in the conventional airbag, in the wrapping area wrapped by the wrapping material, the portion wrapped by the wrapping material and the portion not wrapped by the wrapping material are arranged along the axial direction of the airbag body.
It will be arranged intermittently, and the part of the airbag body that is not wrapped in the wrapping material will inevitably inflate due to springback, and when installing it in the vehicle, the airbag is arranged in a narrow storage part. A difficult task had arisen.

Incidentally, it is conceivable to wrap the airbag body with a bag-shaped (cylindrical) wrapping material so that the folded state can be maintained over substantially the entire length of the airbag body. In such a case, If the inner diameter of the wrapping material is small, it will take time and effort to insert the airbag body into the wrapping material after folding, and if the inner diameter of the wrapping material has a margin, insert the folded airbag body into the wrapping material. After that, the work of reducing the diameter of the wrapping material itself is required, and the work must be performed over substantially the entire length of the wrapping area in the airbag body, which is also troublesome.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide an airbag capable of keeping the airbag body in the lapping area compact by a simple lapping operation.

[0007]

An air bag according to the present invention comprises an air bag body and a breakable wrapping preventing wrapping material.
An airbag that is folded and housed in the periphery of an opening on the inside of a vehicle in a vehicle body, expands and inflates so as to cover the opening when inflating gas flows, and is folded and then wrapped around a wrapping material. , Wrapping material,
It is composed of multiple wrapping yarns that wind the folded airbag body with a blade so that it folds along the axial direction of the folded airbag body and intersects the axial direction at an angle. Of the wrapping yarn, which is wound by a blade to prevent the wrapping from collapsing, and the wrapping area enables prevention of unraveling of a plurality of wrapping yarns, at the end portion,
It is characterized in that a wrapping thread wound by a blade is arranged without being displaced in the axial direction of the folded airbag body, and a wrapping portion which is wound and bound is disposed.

In the airbag according to the present invention, in the wrapping area of the airbag body, a plurality of wrapping yarns constituting the wrapping material are intermittently provided along the axial direction of the folded airbag body having a substantially rod shape. It is not arranged, but is wound around the outer periphery of the folded airbag body by blade winding so as to cross the axial direction of the airbag body at an angle.

In this plaid winding, a plurality of wrapping yarns are divided into two groups, and the yarns of each group are
With respect to the folded airbag main body, the groups are wound in the opposite directions, and further, at one crossing point on the outer peripheral surface of the airbag main body between the wrapping yarns, the yarn located at the upper position is At a crossing position at another position along the axial direction of the airbag main body on the extension, it is appropriately reversed to the lower position and pressed by another thread, and further at another crossing position on the extension, another thread It is a winding method in which the material is wound so that it is pressed, and the pressed and pressed states are repeated.

Therefore, in the airbag of the present invention, the wrapping yarn presses the outer peripheral surface of the airbag main body in most of the outer peripheral surface of the airbag main body in the wrapping area in the axial direction. Become. As a result, in the wrapping area, the state in which the airbag body is compactly folded can be uniformly maintained along the axial direction of the airbag body. That is, even if only two wrapping yarns are used, those yarns are wound in the opposite direction with respect to the folded airbag body. In this case, on the outer peripheral surface of the airbag main body in the axial direction, the two threads can press the outer peripheral surface of the airbag main body only at one intersection where the threads intersect each other. However, between the crossing points separated from the crossing point, the two threads separate from each other and press the outer peripheral surface of the airbag body. Therefore, the airbag body is compactly wrapped in the lapping area.

To carry out the wrapping work in the wrapping area, a plurality of wrapping yarns are simply wound around the outer periphery of the airbag body by a blade so as to cross the axial direction of the airbag body at an angle. Yes, for example,
It can be easily carried out using a braiding machine similar to that used for forming the braided layer of the reinforcing hose having the braided layer.

Further, at the end of the wrapping area, the wrapping yarn to be wound by the blade is simply disposed without displacing the wrapping yarn to be wound in the axial direction of the folded airbag body. Is prevented from unraveling. Therefore, with respect to the end processing of the wrapping yarn at the end of the wrapping area, it is possible to omit processing such as pressing with a tape material as much as possible, and the end processing of the wrapping yarn does not take time and effort.

In particular, the present invention is a wrapping mode in which a plurality of wrapping yarns are wound by a blade, and in this blade winding, as described above, one wrapping yarn is used in the axial direction of the folded airbag body. Since other yarns are pressed along or are pressed against other yarns, the wrapping yarns can be wound one or more times with the blade wound in a stopped state without moving the winding part. In this case, the yarns can be easily bound together, and the binding portion in which the loosening of the yarns is prevented can be easily formed.

Therefore, according to the airbag of the present invention, the airbag main body in the wrapping area can be kept compact by a simple wrapping operation, and the wrapping yarns at the ends of the wrapping area cannot be unraveled. The processing is also easy, and the wrapped airbag can be manufactured with reduced man-hours and costs.

According to a second aspect of the present invention, the airbag body is provided with at least two front and rear wrapping areas that are separated from each other in the front and rear, and binding portions are respectively provided at adjacent ends of the front and rear wrapping areas. At the site of the airbag body between the two adjacent binding portions of the front and rear wrapping areas, a plurality of wrapping threads are connected so as to extend substantially along the axial direction of the folded airbag body. For example, the following actions and effects can be obtained.

That is, even if the airbag body is provided with a plurality of wrapping areas, the wrapping thread can be connected between the binding portions of the adjacent wrapping areas without cutting the wrapping yarn. Therefore, the lapping work in each lapping area can be efficiently performed. Then, in this case, between the binding portions of the adjacent wrapping areas, it is sufficient to simply move the airbag body without winding each wrapping thread around the folded airbag body. You can wrap the wrapping area.

Further, in this case, as in claim 3, the airbag main body is connected to an inflator for supplying an inflation gas to a portion of the airbag main body between the front and rear wrapping areas separated from each other in the front and rear. Even if the connection port portion into which the inflation gas can flow is provided, the connection port portion can be easily connected to the inflator.

That is, a plurality of wrapping yarns are continuously provided in a portion of the airbag main body between the front and rear wrapping areas that are separated from each other in the front-rear direction so as to extend substantially along the axial direction of the folded airbag main body. The connection port can be easily pulled out from the gap between the predetermined wrapping yarns and can be connected to the inflator without any trouble.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings.
As shown in FIGS. 1 to 3, it is used for a head protection airbag device M mounted on a vehicle. In the airbag 10, the folded state of the airbag body 11 is maintained by winding the wrapping material 22. Then, the airbag 10 in that state is a vehicle body (body) 1
Is provided over the front pillar portion FP, the roof side rail portion RR, and the rear pillar portion RP at the upper edge side peripheral edge of the opening W such as the door and the window portion inside the vehicle.

The head protection airbag device M includes an airbag 10, an inflator 34, and mounting brackets 35 and 38.
-41 and the airbag cover 8 are comprised.

As shown in FIGS. 1 and 5, the inflator 34 supplies inflation gas to the folded airbag 10 and is of a cylinder type. The tip (front end) of the inflator 34 is provided with a connection port portion 15 of a gas inflow portion 12 of the airbag 10 (airbag body 11), which will be described later, and is connected using a clamp 32.

The inflator 34 uses two mounting brackets 35 made of a substantially cylindrical sheet metal to form a rear pillar portion R.
It is attached to the body 1 inside the car P. Each mounting bracket 35 has an inflator 34.
Is attached to the inner panel 2 made of sheet metal on the body 1 side by using two mounting bolts 36.

The airbag cover 8 includes a lid 4a on the lower edge side of the pillar garnish 4 arranged in the front pillar portion FP and a lid 5a on the lower edge side of the roof headlining 5 arranged in the roof side rail portion RR. It is configured.

The roof head lining 5 is made of synthetic resin and is attached to the inner panel 2 of the body 1 in the vehicle interior I of the roof side rail portion RR by an attaching means (not shown) as shown in FIGS. There is. The lid 5a on the lower edge side of the roof head lining 5 is capable of projecting the airbag body 11 when deployed and inflated, and the lower end 5b side is opened to the inside I of the vehicle. As shown in FIGS. 1 and 2, the lower end 5b of the lid 5a penetrates into the vehicle outer side O of the upper ends 6a and 7a of the rear pillar garnish 6 and the center pillar garnish 7 in the rear pillar RP and the center pillar CP. . And the lower ends 5b of the lid are
-Locked to 7a.

The front pillar garnish 4 is also made of synthetic resin and is attached to the inner panel 2 of the body 1 inside the front pillar portion FP. The lid 4a of the garnish 4 also opens to the inside I of the vehicle so that the airbag body 11 can project when the airbag body 11 is deployed and inflated.

As shown in FIGS. 1, 4, and 5, the airbag 10 is composed of an airbag body 11 and a breakable wrapping material 22 for preventing breakage. The airbag body 11 has a flexible bag shape, and is formed by bag-weaving using polyamide yarn or the like. After weaving the airbag body 11, a coating agent such as silicone is applied to the outer surface of the airbag body 11 in order to improve the heat resistance of the airbag body 11.

As shown in FIG. 4, the airbag body 11 is composed of a gas inflow portion 12 into which the inflation gas from the inflator 34 can flow, and a non-inflow portion 17 into which the inflation gas does not flow. .

The gas inflow part 12 is a front inflating part 13 that expands and inflates laterally outside the front seat when the inflating gas flows in.
And the rear inflating portion 14 that expands and inflates laterally outside the rear seat
And a connection port portion 15 are provided. The connection port portion 15 has a substantially cylindrical shape and is disposed at a substantially middle upper edge side position in the front-rear direction of the airbag body 11, that is, a position on the upper edge side between the front inflating portion 13 and the rear inflating portion 14. Are arranged so as to project upward and extend rearward, and the rear end is opened so that the expansion gas from the inflator 34 flows into the gas inflow portion 12.

The non-inflow portion 17 is arranged so as to surround the periphery of the gas inflow portion 12, and a plurality of attachment portions 18 for attaching the airbag body 11 to the inner panel 2 of the body 1 are provided on the upper edge side. Are installed. In addition, the non-inflow part 1
7 is configured to include a restricting portion 19 and a plate-shaped portion 20 which are arranged in the regions of the front inflating portion 13 and the rear inflating portion 14.

The restricting portion 19 is arranged so as to connect the vehicle inner side wall portion and the vehicle outer side wall portion of the gas inflow portion 12 at the time of inflation, and controls the thickness of the front and rear inflating portions 13 and 14 at the time of inflation. The airbag body 11 is arranged substantially evenly and in order to generate tension in the vehicle front-rear direction from the mounting portion 18A on the front end side to the mounting portion 18F on the rear end side in the airbag body 11 when the inflation is completed.

The plate-like portion 20 is arranged in a rectangular plate shape between the front and rear inflating portions 13 and 14, and has a gas inflow portion 1 at the time of inflation.
It is arranged so that the vehicle inner side wall portion and the vehicle outer side wall portion in 2 are connected. The plate-shaped portion 20 is provided in order to reduce the volume of the gas inflow portion 12 and shorten the time from the start of inflation of the airbag body 11 to the completion of inflation.

The flow of the inflating gas G in the airbag body 11 will be described. As shown in FIG. 4, the inflating gas G is connected to the connection port portion 15 with the inflator 34 exterior.
When flowing into the gas inflow portion 12 from the
It interferes with the upper horizontal bar portion 19a of the restriction portion 19D and flows so as to be divided into front and rear sides. And the front and rear inflatable parts 13.1
4 from the upper part to the lower side of the front and rear inflatable parts 13 and 14, respectively, and the entire front and rear inflatable parts 13 and 14 are inflated, so that the inflation of the airbag body 11 is completed. Becomes

Each mounting portion 18 is provided with a mounting hole 18a at the center thereof, and a mounting bolt 39 is mounted in each mounting hole 18a.
(See FIGS. 2 and 3) will be inserted. Each mounting hole 1
8a is formed by punching after the bag body 11 is woven.

Further, as shown in FIGS. 1, 3, and 5, a mounting bracket 38 made of sheet metal is attached to each mounting portion 18 excluding the mounting portions 18E and 18C located above the rear pillar portion RP and the center pillar portion CP. It is fixed. Bracket 38
Is for firmly attaching the folded airbag body 11 to the inner panel 2 on the body 1 side. Each mounting bracket 38 is made of sheet metal, and
The inner plate 38a and the outer plate 38b on the outer side O of the vehicle are provided. Inner / Outer Plate 38a / 38
b corresponds to the mounting hole 18a of each mounting portion 18,
A mounting hole 38c is provided.

As shown in FIG. 3, each mounting portion 18 is mounted on the inner panel 2 using mounting bolts 39 and brackets 38. Each bolt 39
It is inserted into the mounting holes 38c and 18a and is screwed into a nut 2b fixed to the peripheral edge of the mounting hole 2a of the inner panel 2.

As shown in FIGS. 2 and 5, the mounting bracket 41 holds each of the mounting portions 18E and 18C of the airbag body 11, and like the bracket 38, the mounting bracket 41 and the inner plate 41a of the vehicle inner side I. The garnish 6 on the inside I of the vehicle in the rear pillar portion RP and the center pillar portion CP is configured by including the outer plate 41b on the outside O of the vehicle.
7 is located above. Inner / Outer plate 41a
41b has mounting holes 41c corresponding to the mounting holes 18a of the mounting portions 18E and 18C.

Further, each outer plate 41b is provided with a regulating portion 4
2 is provided. Each restriction portion 42 is provided to prevent the airbag body 11 from entering the vehicle outer side O of the garnishes 6 and 7 at the initial stage of the expansion and inflation of the airbag body 11. And each regulation part 42
Has a substantially L-shaped cross section including a portion that supports the lower surface side of the folded airbag 10 and a portion that supports the vehicle outer surface. In addition, in the case of the embodiment, an extension portion 42a extending downward is formed at the vehicle-inside end portion of each restriction portion 42 (see FIGS. 2, 8 and 10).

The wrapping material 22 is composed of a wrapping thread 22 formed by collecting a plurality of threads such as polyester thread, polyamide thread and urethane thread. In the case of the embodiment, six wrapping yarns 22 are used, each of which is formed by twisting a long filament made of polyester, and the 30th yarn is used. And
The wrapping yarn 22 of the embodiment is JIS L 101.
The yarn strength according to 3.7.5 is 28 to 35 N, and
The elongation according to JIS L 1013.7.5 is 12 to 2
8%.

Furthermore, each wrapping thread 22 is shown in FIG.
As shown in 1 to 13, along the axial direction X of the airbag main body 11 (which is the folded airbag main body 26 or the folded main body 26) folded into a substantially rod shape so as to cross the axial direction X obliquely. , Folded body 2
It is spirally wound around the outer periphery of the lapping area 27. In the case of the embodiment, the wrapping area 27
Are arranged in two front and rear areas 27A and 27B of the gas inflow portion 12 from the front end side to the rear side of the main body 26 except for the vicinity of the connection port 15 and the vicinity of the front and rear ends of the airbag body 11.

Further, in the case of the embodiment, the respective wrapping yarns 22 in these wrapping areas 27A and 27B.
When viewed from the rear end side of the main body 26 to the front end side, the three yarns 23 (23A, 23B, 23C) wound at a predetermined pitch P1 so as to extend in the counterclockwise direction to the front end side and the front end side in the clockwise direction. The folded main body 26 is wrapped by using three yarns 24 (24A, 24B, 24C) wound at a predetermined pitch P2 and a total of six wrapping yarns 22 so as to extend. And these two groups of three yarns 23
And the thread 24 are wound around the outer periphery of the folded main body 26 so as to intersect with each other.

Further, the wrapping yarns 23 and 24 are the yarn 2
The main body 26 is arranged so that the yarns 23 or 24 located on the upper side of the outer surface of the main body 26 at the intersections of 3 · 24 become different yarns 24 · 23 at the adjacent intersections.
It is wrapped around the outer circumference of. In other words, in the case of the embodiment, at the time of forming the braided layer of the reinforcing hose having the braided layer, two sets of three yarns 22 in total, such as two sets of three so as to wind the reinforcing yarn with a blade, Wind the blade, body 26
Wrapped around. That is, with this blade winding,
At a predetermined crossing point from the front end to the rear end of the main body 26, for example, one wrapping thread 23A is arranged above the outer surface of the main body 26 so as to press the wrapping thread 24A. Then, the wrapping yarn 24B is arranged at the upper position so as to press the wrapping yarn 23A at the rear crossing portion immediately after that, and the wrapping yarn 23A is wrapped at the rear crossing portion immediately after that. So as to press the thread 24C
It is arranged above the wrapping yarn 24C and wound (see FIG. 13).

Therefore, for example, even if one wrapping yarn 23A is cut in the wrapped area 27, the other wrapping yarns 24 are provided on both sides with the cut point in between.
Any one of A, 24B, and 24C holds the cut wrapping yarn 23A, so the cut wrapping yarn 23
A is prevented from unraveling over the entire length of the airbag body 11. Therefore, the cut wrapping yarn 2
3A can contribute to the wrapping of the airbag main body 11 except between the intersecting portions with the cut portions therebetween.

Further, as shown in FIGS. 11 and 13, in the wrapping area 27, each yarn 23A, 23B, 23C,
Each winding pitch P1 of 24A, 24B, and 24C
Both P2 are set to 90 mm, and the inter-thread distance L1 along the axial direction X of the main body 26 in the yarns 23A, 23B, and 23C in the same winding direction, and the yarn 24 in the same winding direction.
Axial direction X of the main body 26 in A, 24B, 24C
The inter-yarn distance L2 along each line is 30 mm. Further, each thread 22 has an intersecting angle θ with the axial direction X of the folded airbag body 26 of about 51 °.

Incidentally, FIG. 13 shows each of the yarns 23A, 23B, 2
The winding state of 3C / 24A / 24B / 24C is displayed in the development view of the outer peripheral surface of the folded airbag body 26, and the portion of the reference numeral 26a is the front side of the inside of the body 26 of the vehicle. The portion 26b is the upper surface side of the main body 26, the portion 26c is the rear side on the vehicle outer side of the main body 26, and the portion 26d is the main body 26.
Is the bottom side.

Further, as shown in FIGS. 5 and 16, the pitches P1 and P2, the inter-thread distances L1 and L2, and the crossing angle θ are determined in the portion 28 of the folded main body 26 near the connection port portion 15, that is, , Front and back wrapping area 27A
-In the part 28 between 27B, it is not maintained and each thread 2
3 and 24 are arranged substantially along the axial direction X. The reason is that the connection port portion 15 is connected to the inflator 34 without any trouble. That is, the connection port portion 15
Is a part that is long in the front-rear direction. And each thread 23.2
4 wraps the connection port portion 15 integrally with the airbag body 11, and after wrapping, the connection port portion 15 is connected to the thread 23, 24.
Since it cannot be taken out from between, it becomes impossible to connect with the inflator 34. Therefore, the yarns 23 and 24 are
The exclusion portion 28 is not wound like the other portions 27A and 27B.

Further, the yarns 23 and 24 are respectively provided at the front end portion 27Aa of the wrapping area 27A and the rear end portion 27 of the wrapping area 27B in the folded airbag body 26.
A binding portion 29 wound twice is formed on each of the front and rear end portions 28a and 28b of Bb and the excluding portion 28 described above. Front / rear end 27 of wrapping area 27A / 27B
The binding portion 29 formed on the Aa / 27Bb forms an end-side binding portion 29a, and the front / rear end portions 28a / 28 of the exclusion portion 28 are formed.
The bundling portion 29 formed on b is an inner bundling portion 29b. By the way, the front end portion 28a of the exclusion portion 28 coincides with the rear end portion 27Ab of the front lapping area 27A, and the rear end portion 28b of the exclusion portion 28 coincides with the front end portion 27Ba of the rear lapping area 27B.

Next, assembling of the head protection airbag apparatus M of the embodiment will be described. First, the airbag body 11 is folded. When the airbag main body 11 is folded, as shown in FIGS. 2 to 4, the airbag main body 11 is folded in a bellows fold that is folded in a substantially vertical direction from a flat state in a non-expanded state. That is, the airbag body 11 has a fold C parallel to the upper edge 11a and the lower edge 11b side is the upper edge 1a.
Fold it in a bellows so as to approach the 1a side. Further, after folding, the wrapping yarn 22 is wound around the folded body 26 to form the wrapped airbag body 30 that has been wound.

In the case of the embodiment, as shown in FIG.
A predetermined folding device 52 known in Japanese Patent No. 04, etc. is used, and a wrapping device 54 connected to the folding device 52 is used for a wrapping operation using the wrapping yarn 22.

The lapping device 54 is similar to a braiding machine used when forming a braided layer of a reinforcing hose having a braided layer, and includes a bobbin carrier 55 that holds and rotates six bobbins 56. Is configured. The bobbin carrier 55 has an insertion hole 57 formed in the center thereof, through which the folded main body 26 is inserted. In addition, each bobbin 56 has a wrapping yarn 23A.
・ 23B, 23C, 24A, 24B, and 24C are wound.

Further, the wrapping device 54 includes guide means (not shown) for guiding the folded main body 26 from the folding device 52 to the insertion hole 57 at the center of the bobbin carrier 55,
A guide means (not shown) that guides the wrapped airbag body 30 wound around the wrapping yarn 22 after being removed from the insertion hole 57, and a conveying means 59 that conveys the folded body 26 or the wrapped airbag body 30 to the front side. , And are configured. Transporting means 59
Is a conveyor belt conveyor or a conveyor roller 60 arranged on the folding device 52 side, or a conveyor belt conveyor or a conveyor roller 61 arranged on the bobbin carrier 55 side.
And so on.

Further, the wrapping device 54 is provided with a length measuring roller 58a for measuring the carrying distance of the airbag body 26, an arrangement position detecting device 58 having a detecting sensor 58b capable of measuring the arrival position, and the like ( 15B), the lapping work is automatically performed except for the winding work of the tape materials 44 and 46 and the cutting work of the thread 22 which will be described later.

Then, in the lapping work using the lapping device 54, the conveying means 59 is operated to convey the main body 26 folded by the folding device 52 in order so as to pass through the insertion hole 57 and perform the lapping. Thread 22
While feeding the bobbin carrier 55, the bobbin carrier 55 is inserted into the insertion hole 57.
Rotate in the circumferential direction.

More specifically, when the folded main body 26 is discharged from the folding device 52, a breakable tape material 44 is wound around the front end and the rear end of the main body 26 excluding the area of the gas inflow portion 12. (Refer to FIGS. 5, 6 and 12). Since the wrapping yarn 22 cannot be wound around this area, the tape material 44 is wound around in advance.

Then, the folded main body 26 is
The wrapping yarn 22 is wound while passing through the insertion hole 57 of the bobbin carrier 55 and adjusting the conveyance speed and the rotation of the bobbin carrier 55.

At that time, in each main body 26, as shown in FIG. 14A, when the position of the front end portion 27Aa of the lapping area 27A reaches the winding position 54a of the lapping device 54, the conveyance of the main body 26 is stopped. Then, the bobbin carrier 55 is rotated twice, and the six threads 22 are wound twice.
The end side binding part 29a is formed by winding.

The yarns 22 wound around the front end portion 27Aa of the wrapping area 27A are the lapped main body 30A which has been lapped in advance (specifically, the wrapping area 27B in the main body 30A).
It extends from the end side binding portion 29a) of the rear end portion 27Bb without being cut.

When the end-side binding portion 29a is formed at the front end portion 27Aa of the wrapping area 27A, the bobbin carrier 55 is rotated while the main body 26 is moved forward at a predetermined conveying speed, and the six yarns 22 are formed. Then, each yarn 22 is wound around the front wrapping area 27A of the main body 26 at the pitches P1 and P2 and the distances between yarns L1 and L2 described above (see B in FIG. 14).

After that, as shown in FIG. 14B, if the front end portion 28a (the rear end portion 27Ab of the lapping area 27A) of the excluding portion 28 in the folded main body 26 reaches the winding position 54a of the lapping device 54. If
The conveyance of the main body 26 is stopped, and the bobbin carrier 55 is rotated twice to form the inner binding portion 29b around which the six threads 22 are wound by two turns.

Then, after forming the inner binding portion 29b, the bobbin carrier 55 is stopped from rotating, and each yarn 22
Instead of wrapping each thread 22 in a spiral,
The main body 26 is conveyed to the front side so as to be extended along the axial direction X of the main body 26 (see A in FIG. 15).

After that, as shown in FIG. 15A, if the rear end portion 28b (the front end portion 27Bb of the lapping area 27B) of the exclusion portion 28 in the folded main body 26 reaches the winding position 54a of the lapping device 54. If
The conveyance of the main body 26 is stopped, and the bobbin carrier 55 is rotated twice to form the inner binding portion 29b around which the six threads 22 are wound by two turns. As a result, as shown in FIG. 16, the inner binding portion 29b is formed at the front and rear end portions 28a and 28b of the exclusion portion 28.

If the inner side binding portion 29b is formed at the rear end portion 28b of the exclusion portion 28, at a predetermined conveying speed,
While moving the main body 26 forward, the bobbin carrier 55 is rotated to reel out each of the six yarns 22, and the pitches P1 and P
Each yarn 22 is wound around the rear wrapping area 27B of the main body 26 at the distance of 2 and the distance between yarns L1 and L2 (see B in FIG. 15).

Thereafter, as shown in FIG. 15B, the rear end portion 27 of the rear lapping area 27B of the folded main body 26 is located at the winding position 54a of the lapping device 54.
When Bb reaches, the conveyance of the main body 26 is stopped, the pobbin carrier 55 is rotated twice, and the six yarns 22
The end side binding part 29b to be wound is formed by two turns to form the wrapped airbag body 30.

Then, the subsequent wrapping operation of the folded airbag body 26 is performed in the same manner as described above,
The wrapped airbag body 30 is sequentially formed.

Then, when the wrapped airbag body 30 is sequentially formed, as shown in FIG. 15B, the end-side binding portion 29a on the front end side of the body 30 immediately after lapping.
And each thread 22 connected to the end side binding portion 29a of the lapped airbag body 30A that has been lapped in advance are cut off, the wrapping airbag body 30 is individually separated. You can take it out.

Thereafter, the wrapped airbag body 3
0, each mounting portion 18 is pulled out, a predetermined mounting bracket 38, 41 is mounted on each mounting portion 18, and further, the restriction portion 42 and the main body 30 are not separated from each other as shown in FIG.
As shown in 0, a breakable tape material 46 is wound around the restricting portion 42 together with the airbag body 30.

In addition, the inflator 34 is attached to the connection port 15.
Is inserted, and the clamp 32 is fitted on the outer peripheral side of the connection port 15 to connect the connection port 15 and the inflator 34. As a result, as shown in FIG. 5, the airbag assembly 5
0 is formed. The mounting brackets 35, 35 are attached to the inflator 34 in advance.

After that, each mounting bracket 35, 38.4
1 is arranged at a predetermined position on the inner panel 2, and each mounting hole 1
The airbag assembly 50 can be attached to the body 1 by fixing the mounting brackets 35, 38, 41 to the inner panel 2 using the bolts 36, 39 through which the 8a, 38c, 41c are inserted. Then, by attaching the front pillar garnish 4 and the roof head lining 5 to the body 1, and further attaching the rear pillar garnish 6 and the center pillar garnish 7 to the body 1, the head protection airbag device M can be mounted on the vehicle. You can

When the inflator 34 is operated after the device M is mounted on the vehicle, the inflation gas from the inflator 34 flows from the connection port 15 to the front / rear inflatable portions 13 and 14 of the gas inflow portion 12. , The airbag body 11 begins to expand while canceling the fold, and the wrapping yarn 22 and the tape materials 44 and 46 are broken, and the airbag body 11
Causes the front pillar garnish 4 and the lids 4a, 5a of the roof head lining 5 to be pushed open and greatly expanded so as to cover the opening W as shown by the chain double-dashed lines in FIGS.

In the airbag 10 of the embodiment,
Wrapping area 2 of folded airbag body 26
In 7A and 27B, the plurality of wrapping yarns 22 forming the wrapping material are not arranged intermittently along the axial direction X of the substantially rod-shaped folded airbag body 26, but the airbag body 26 It is wound around the outer periphery of the folded airbag body 26 by blade winding so as to cross the axial direction X of the above.

Therefore, in the airbag 10 of the embodiment, the outer peripheral surface sides 26a, 26b of the airbag body 26 in the wrapping areas 27A, 27B in the axial direction are formed.
In most of 26c and 26d, the wrapping yarn 22 presses the outer peripheral surface of the airbag body 26 at at least a plurality of locations (see FIG. 13). Particularly, in the embodiment, the six threads 22 (23A, 23B, 23C, 24A,
24B and 24C), and the airbag body 26
The wrapping yarn 22 presses the outer peripheral surface of the airbag main body 26 in the range of three to six positions including the intersection of the yarns 23 and 24 on the outer peripheral surface in the direction around the axis. As a result, in the wrapping area 27, the state in which the airbag body 26 is compactly folded can be maintained more uniformly along the axial direction X of the airbag body 26.

And the wrapping areas 27A and 27B
The wrapping work inside is performed with a plurality of wrapping yarns 22.
Is only wound around the outer periphery of the airbag body 26 by a blade so as to obliquely intersect the axial direction X of the airbag body 26, and when the braided layer of the reinforcing hose having the braided layer is formed. This can be easily performed by using a lapping device 54 similar to the braiding machine used.

Furthermore, the wrapping areas 27A and 27B
At the ends 27Aa, 27Ab, 27Ba, 27Bb of
Each of the blade-wrapped wrapping yarns 22 is moved (displaced) in the axial direction X of the folded airbag body 26.
The binding portion 2 that is simply wound and bound without causing
9 is provided to prevent the wrapping yarn 22 from unraveling. Therefore, the wrapping area 27A ・ 2
Regarding the end treatment of the wrapping yarn 22 at the end portions 27Aa, 27Ab, 27Ba, 27Bb of 7B, it is possible to omit a separate process such as pressing with a tape material as much as possible, and the end treatment of the wrapping yarn 22 is not troublesome.

In particular, in the embodiment, the six wrapping yarns 22 are wrapped by a blade, and in this blade winding, as described above, for example, one wrapping yarn 23A is a folded airbag. Body 2
The other thread 24A is pressed along the axial direction X of 6, or is pressed by the other thread 24B. Therefore, if each wrapping yarn 22 is wound by a blade for one rotation or more in a stopped state without moving (displacement) the wound portion, each yarn 22 will not be changed to another one as shown in FIGS. It is possible to easily form the binding portion 29 that is restrained by the yarns 22 and bound together to prevent the yarns 22 from unraveling.

The crossing points T between the threads 22 shown in FIGS. 9 and 10 are shown only at nine points in the illustrated example, but in reality, as shown in FIG. In the area 31 for two windings (that is, for two pitches), there are 36 intersections T. Therefore, for example, one thread 23A
In the area 31 for 2 pitches, the other yarns 24A, 24
B ・ 24C can be pressed at 6 points. Then, when the wrapping yarns 22 are wound around the airbag main body 26 according to the blade winding specifications in a stopped state without moving (displacement) the winding portion, one yarn 23A is obtained.
However, at the six points corresponding to the crossing points, the other thread 24A
-It will be pressed by 24B and 24C, and will also be pressed by the yarns 23B and 23C wound in the same direction and the yarn 23A itself. In addition, since such a state also occurs in each of the yarns 23A, 23B, 23C, 24A, 24B, and 24C, in the binding portion 29, the wrapping area 2
It is possible to easily secure a state in which the unraveling of each yarn 22 that is propagated to 7A / 27B is prevented.

Therefore, in the airbag 10 of the embodiment, the wrapping area 2 is formed by the simple wrapping work.
The airbag main body 26 in the 7A / 27B can be kept compact, and further, the terminal treatment for preventing the wrapping yarns 22 at the end portions 27Aa / 27Ab / 27Ba / 27Bb of the wrapping areas 27A / 27B from being unraveled,
Easier and more man-hours for wrapped airbag 10.
It can be manufactured at low cost.

Further, in the embodiment, the folded airbag body 26 is provided with two front and rear wrapping areas 27A and 27B which are separated from each other in the front and rear, and adjacent end portions 27Ab and 27B of the front and rear wrapping areas 27A and 27B. 27B
a, inner side binding portions 29b are formed on each other,
The airbag body 2 between the two adjacent binding portions 29b and 29b of the front and rear wrapping areas 27A and 27B.
In the region 28 of 6, the six wrapping yarns 22 are arranged so as to substantially follow the axial direction X of the folded airbag body 26.
It is connected.

Therefore, the folded airbag body 2
Even if 6 has a plurality of wrapping areas 27A and 27B, the wrapping yarn 22 is provided between the binding portions 29a and 29a of the adjacent wrapping areas 27A and 27B.
Since the blade winding work can be performed in a state where the blades are connected without being cut, the lapping work can be efficiently performed in each of the lapping areas 27A and 27B. Then, in this case, in the excluding portion 28, the wrapping yarn 22 is not wound around the folded airbag body 26, the bobbin carrier 55 of the wrapping device 54 is not rotated, and the transporting means 59 is simply activated to operate the air bag. All you have to do is move the bag body 26 forward,
Very easily, wrapping areas 27A ・ 2 at multiple locations
7B can be wrapped.

Further, in this case, in the embodiment, the portion 28 of the airbag body 26 between the front and rear wrapping areas 27A and 27B which are separated from each other in the front and rear is connected to the inflator 34 for supplying the inflation gas G, The connection port portion 15 that allows the inflation gas G to flow into the airbag body 11 is
Even if it is provided, the connection port portion 15 can be easily connected to the inflator 34.

That is, in the exclusion portion 28 between the front and rear wrapping areas 27A and 27B, which are separated from each other in the front and rear direction, the six wrapping threads 22 are arranged substantially along the axial direction X of the folded airbag body 26. It is only continuous.
Therefore, the connection port portion 15 can be easily pulled out from the gap between the predetermined wrapping yarns 22 and can be connected to the inflator 34 without any trouble.

In the embodiment, the case where the six wrapping yarns 23A, 23B, 23C, 24A, 24B and 24C are used is shown. However, if the blade is wound around the outer peripheral surface of the wrapping area 27 (27A / 27B) in the folded main body 26, at least two wrapping threads 22 are used to maintain the action and effect of the present invention. Thus, the folded main body 26 can be wrapped.

For example, the airbag 1 shown in FIGS.
In 0A, in the wrapping areas 27A and 27B,
The two wrapping yarns 23 and 24 are the airbag body 26.
It is wound on the blade. The yarns 23 and 24 are the same as the yarn 22 of the embodiment. And each thread 23
With reference to the wrapping yarns 23 and 24 wound in the same direction, the yarn distances L1 and L2 adjacent to each other along the axial direction X of the folded main body 26 are both 30 mm. Further, the pitch P1 and P2 wound by the yarns 23 and 24 are
2 mm for each thread with a length of 30 mm that matches the distance L1 and L2
An intersecting angle θ of 3 · 24 with the main body axis direction X is about 75 °. Even with such a lapping specification, the end portions 27Aa, 27Ab, 27 of the lapping areas 27A, 27B are
Wrapping thread 23 to be wound on Ba / 27Bb with a blade
24 is the axial direction X of the folded airbag body 26
Binding portion 29 that is wound and bound without being displaced to
By disposing (29a, 29b), the same action and effect as those of the embodiment can be obtained. Incidentally, when only two wrapping yarns 23 and 24 are used, it is desirable to wind the yarns 23 and 24 twice or more to prevent the binding portion 29 from unraveling.

Further, for example, in the airbag 10B shown in FIGS. 18 and 19, two yarns 23A and 23B and one yarn 24 are blade-wound in the wrapping areas 27A and 27B. Each thread 23A, 23B, 24 is
The wrapping yarn 22 is similar to that of the embodiment. Then, the yarns 23A and 23B wound in the same direction have an inter-yarn distance L1 of 3 along the axial direction X of the folded main body 26.
It is set to 0 mm. Each winding pitch P of the yarns 23A and 23B
No. 1 is 60 mm, and the intersecting angle θ of the yarns 23A and 23B with the main body axial direction X is about 61 °. Further, the distance L2 between the yarns 24 themselves which are adjacent to each other along the axial direction X is 60 which is the same as the winding pitch P2 of the yarns 24.
mm, the crossing angle θ of the thread 24 with the main body axis direction X is
It is about 61 °. Even with such wrapping specifications,
Ends 27Aa and 27 of the wrapping areas 27A and 27B
The wrapping yarns 23A, 23B, 24 to be wound around the blades Ab, 27Ba, 27Bb are wound and bound for one rotation or more without being displaced in the axial direction X of the folded airbag body 26.
By arranging b), it is possible to obtain the same operation and effect as the embodiment.

Therefore, if the number of the wrapping yarns 22 wound around the folded main body 26 by the blade is two or more, three to five, and further seven or more may be used.
When the binding portion 29 is formed, if each thread 22 of the blade winding specification is wound around the same position of the folded main body 26 for one turn or more, the binding portion 29 that prevents the thread 22 from unraveling is formed. Can be easily formed.

Furthermore, in the embodiment, the blade non-winding excluding portion 28 is configured to include not only the connection port portion 15 but also the portion of the attaching portion 18C so that the attaching portion 18C can be easily pulled out and the attaching portion 18C can be easily pulled out. The mounting bracket 41 is easily attached to. With such a configuration, as shown in FIG.
The front and rear ends 28a and 28b (ends 27Ab and 27B of the wrapping areas 27A and 27B).
In a), the binding portion 29 is provided, and the yarns 22 between the binding portions 29 and 29 are arranged so as to be substantially along the axial direction X of the airbag body 26, so that the mounting portion 18 after wrapping can be easily taken out. You may.

Further, in the embodiment, the end side binding portions 29a.2 on the front and rear end sides of the folded airbag body 26.
9a interferes with surrounding members during handling such as transportation,
If there is a risk that the thread 22 will be unraveled, each end side binding portion 29
A breakable tape material 45 may be wound around a (see FIG. 17). By the way, even if the breakable tape material 45 is wound around these locations, the number of winding locations can be reduced as compared with the conventional case where the tape material is wound intermittently, so that the action and effect of the present invention are significantly reduced. There is no such thing.

[Brief description of drawings]

FIG. 1 is a front view of a head protection airbag device in which an airbag according to an embodiment of the present invention is used, as seen from the inside of a vehicle.

FIG. 2 is a schematic enlarged cross-sectional view of a II-II portion of FIG.

FIG. 3 is a schematic enlarged cross-sectional view of a III-III portion of FIG.

FIG. 4 is a front view showing a deployed state when the airbag body used in the embodiment is not inflated.

FIG. 5 is a front view showing the airbag assembly of the embodiment.

6 is a schematic enlarged cross-sectional view of a VI-VI portion of FIG.

FIG. 7 is a schematic enlarged cross-sectional view of a VII-VII portion of FIG.

FIG. 8 is a schematic enlarged cross-sectional view of a VIII-VIII portion of FIG.

9 is a schematic enlarged cross-sectional view of the IX-IX portion of FIG.

10 is a schematic enlarged cross-sectional view of the XX portion of FIG.

FIG. 11 is a partial front view of the airbag that has been wrapped according to the embodiment.

FIG. 12 is a partial perspective view of the airbag that has been wrapped according to the embodiment.

FIG. 13 is a development view showing a state in which a wrapping thread is wound around the airbag body of the embodiment.

FIG. 14 is a diagram showing a wrapping process of the airbag of the embodiment.

FIG. 15 is a diagram showing a wrapping process of the airbag of the embodiment, showing a state after FIG.

FIG. 16 is a partial front view of the vicinity of the connection opening portion of the airbag immediately after the wrapping according to the embodiment.

FIG. 17 is a partial front view of an airbag according to another embodiment.

18 is a development view showing a state in which a wrapping thread is wound around the airbag body shown in FIG.

FIG. 19 is a partial front view of an airbag according to still another embodiment.

20 is a development view showing a state in which a wrapping thread is wound around the airbag body shown in FIG.

FIG. 21 is a diagram showing a modified example of the airbag of the embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... (Body) body, 10 / 10A / 10B ... Airbag, 11 ... Airbag body, 15 ... Connection opening part, 18 ... Attachment part, 22 ... (Wrapping material) Wrapping thread, 23 (23A, 23B, 23C) ... wrapping thread, 26 ... folded airbag body, 27 (27A / 27B) ... wrapping area, 27Aa / 27Ab / 27Ba / 27Bb ... (wrapping area) end, 29 (29a / 29b) ... binding part, 30 ... Wrapped airbag body, 34 ... Inflator, X ... Axial direction (of folded airbag body), W ... Opening, I ... Car interior side, O ... Car exterior side, M ... Head protection airbag device.

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Mitsuru Sugaya             Aichi Prefecture Kasuga-cho, Nishikasugai-gun Ochiai character Nagahata 1             Address within Toyoda Gosei Co., Ltd. F-term (reference) 3D054 AA02 AA03 AA04 AA07 AA18                       BB21 CC04 CC11 CC27 CC45

Claims (3)

[Claims] 1. An airbag main body and a wrapping material for preventing breakage that can be broken, the airbag main body being folded and stored along a peripheral edge of an opening inside a vehicle body. An airbag that can be expanded and inflated so as to cover the opening when an inflation gas flows in, and is folded and then wrapped around the wrapping material, wherein the wrapping material is folded into a substantially rod shape. Along the axial direction of the airbag main body and obliquely intersecting the axial direction, the folded airbag main body is composed of a plurality of wrapping yarns wound around the blade, the airbag main body, a plurality of the wrapping yarns. A wrapping area that is wound by a blade to prevent it from collapsing, the wrapping area being the plurality of wrapping yarns. In order to prevent unraveling, the wrapping thread to be wound by the blade is arranged at the end without displacing the wrapping thread in the axial direction of the folded airbag body, and a binding section that is wound and bound is disposed. An airbag characterized by. 2. The airbag body includes at least two front and rear wrapping areas that are separated from each other in the front and rear direction, and the binding portions are formed at adjacent ends of the front and rear wrapping areas, respectively. In the region of the airbag body between the two adjacent binding portions of the front and rear wrapping areas, the plurality of wrapping threads are connected so as to extend substantially along the axial direction of the folded airbag body. The airbag according to claim 1, wherein: 3. An inflation gas can flow into the airbag body by connecting an inflator that supplies inflation gas to a portion of the airbag body between the front and rear wrapping areas that are separated front and back. The air bag according to claim 2, wherein a different connection port portion is provided.