JP2003054351A - Airbag device for protecting head part - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase a degree of freedom for arranging a guide member, exactly guide a guided portion of an airbag in its unfolding even the portion is not lenear but bent, and smoothly unfold and expand the airbag. SOLUTION: This head part protecting airbag device M is provided with an airbag 13 and the guide member 31. The guide member 31 is connected to the airbag 13, is attached to the car body 1 side, and is arranged to guide the unfolding of the airbag 13. The guide member 31 is provided with a guide cord 32 and plural guide pins 33. The guide cord 32 is connected partially to the airbag 13 and formed into a flexible loop shape. The each guide pin 33 is fixed to the body 1 side and wound with the guide cord 32 to guide sliding of the guide cord 32 in the unfolding of the airbag 13.

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle which is folded and housed on the periphery of a window of a vehicle, and can be expanded and inflated to cover the window when inflation gas flows. The present invention relates to a head protection airbag device including an airbag, and more particularly to a head protection airbag device in which the airbag is deployed and inflated by being guided by a guide member. 2. Description of the Related Art Conventionally, as a head protection airbag device of this type, a cylindrical loop portion is disposed in an airbag, and a guide wire disposed in a pillar portion includes a loop portion. (See Japanese Patent Application Laid-Open No. 9-2490).
No. 89). In this head protection airbag device, when the inflation gas flows into the airbag, the loop portion is guided by the guide wire and slides, and the airbag expands and inflates so as to cover the window. I was However, the loop portion slides on the guide wire and is guided by the guide wire. The loop portion is between the fixed portions of the guide wire to the vehicle body and the guide wire is substantially linear. It was possible to move only at the site, and with the above structure, the guidance of the airbag could not be set freely. [0005] Further, since a space for moving the loop portion of the airbag is required around the guide wire as a guide member, there is a case where an interfering object is arranged on the movement locus of the loop portion. However, a guide wire as a guide member could not be arranged, and the degree of freedom of arrangement of a guide member such as a guide wire was small. SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and can increase the degree of freedom of arrangement of a guide member. However, it is an object of the present invention to provide a head protection airbag device that can accurately guide the airbag and smoothly deploy and inflate the airbag. A head protection airbag device according to the present invention is folded and housed on the periphery of a window of a vehicle, and expands and inflates when an inflation gas flows into the window. And a guide member connected to the airbag and attached to the vehicle body and arranged to be able to guide the deployment of the airbag. An apparatus, wherein the guide member has a flexible loop-shaped guide string partially connected to the airbag, and is capable of guiding sliding of the guide string when the airbag is deployed. And a plurality of guide pins fixed to the vehicle body side and around which the guide string is wound. In the head protection airbag device according to the present invention, if an inflation gas flows into the airbag, the airbag is deployed and inflated. At that time, the guide string partially connected to the airbag is slid and guided by the plurality of wound guide pins, moves in a loop, and connects the airbag to the guide pin of the guide string. The guide is moved along the wound locus. That is, since the airbag is moved along the locus around the guide pin of the guide string and deployed and inflated, the airbag is provided with a space for disposing the guide string. It is also possible to bend and guide the connecting portion of the airbag with the guide string so as to bypass the interference. As a result, the degree of freedom in arranging the guide member is increased, and the vehicle in which various obstacles are arranged can be smoothly arranged to arrange the guide string and the guide pin as the guide member,
The guide string and the guide pin as the guide members accurately guide the deployment and inflation of the airbag, so that the airbag can be deployed and inflated. [0010] If the guide string and the guide pin as the guide members properly complete the guidance of the airbag, tension can be generated at the lower edge of the airbag, etc. It is possible to properly protect. Therefore, in the head protection airbag device according to the present invention, the degree of freedom in arranging the guide member can be improved, and the guided portion of the deploying and inflating airbag is bent, not linearly. Also, the airbag can be guided accurately, and the airbag can be smoothly deployed and inflated. An embodiment of the present invention will be described below with reference to the drawings. The head protection airbag device M of the embodiment shown in FIG. 1 is mounted on a single cab vehicle V, and includes an airbag 13, a guide member 31, an inflator 35, and an airbag cover 11. It is provided with. The single cab vehicle V has a window SW as a side window which is arranged on the side of the seat on which the occupant sits and is located on the side surface VS of the vehicle.
A rear wall portion 7 is provided on the rear side of W so as to be substantially orthogonal to the window SW. Further, this single cab vehicle V has a roof side rail portion R in front of the window SW.
A front pillar portion FP extending obliquely downward from R and disposed substantially vertically; and a rear pillar portion RP extending downward from the roof side rail portion RR between the window SW and the rear wall portion 7. It is configured. Garments 3 and 5 made of synthetic resin are arranged at the pillars FP and RP so as to cover the inner panel 1a made of sheet metal on the vehicle body (body 1) side. Also on the roof side rail portion RR, a roof head lining 4 made of synthetic resin is disposed inside the vehicle so as to cover the inner panel 1a. On the front edge side of the rear pillar garnish 5,
As shown in FIG. 2, a door portion 5 a that opens to the inside I of the vehicle is provided so that a connecting portion 32 a of the guide string 32 described below can be moved downward when the airbag 13 is deployed and inflated. . A thin hinge portion 5b is formed on the rear edge side of the door portion 5a so that the door portion 5a can be easily opened to the inside I of the vehicle. As shown in FIG. 1, a rear window RW is disposed on an upper portion of the rear wall portion 7 so that a rear panel 8 made of sheet metal on the vehicle body (body 1) side and an inner side of the rear panel 8 are formed. And a covering synthetic resin rear trim 9. The upper end of the rear wall 7 is covered with the roof head lining 4 extending from the ceiling, and the inflator 35 is covered with the lower edge 4a. In the case of the embodiment, the airbag cover 11 is composed of lower edges 3a, 4a of the front pillar garnish 3 and the roof head lining 4. The airbag cover 11 is provided so as to cover the inside of the airbag 13 that is folded and housed, and is attached to the airbag 13 so that the airbag 13 can be projected to the inside of the vehicle when deployed and inflated. It is configured to be pushed and open inside the vehicle. The airbag 13 is folded and stored at the upper edge side of the window SW inside the vehicle, and is covered with the airbag cover 11. When the airbag 13 is deployed and inflated, the airbag 13 shown in FIGS.
-As shown in 5, a substantially rectangular plate shape capable of covering the inside of the vehicle between the window SW and the rear pillar portion RP. The airbag 13 is formed by bag weaving using polyamide yarn, polyester yarn and the like. As shown in FIGS. 3 and 4, the airbag 13 has a gas inflow portion 14 which inflates the inflation gas G from the inflator 35 and inflates so as to separate the inner side wall portion 14a and the outer side wall portion 14b from each other. , A non-inflow portion 20 through which the inflation gas G does not flow. The gas inflow portion 14 is provided with an inflow portion 15 which inflates and inflates the inflation gas G so as to cover the inside of the window SW and the rear pillar portion RP, and an inflow portion 18. Have been. The expansion inflow portion 15 is arranged vertically so as to cover the vehicle interior of the rear pillar portion RP, and a horizontal expansion portion which is arranged so as to extend forward and vertically from the vertical expansion portion 16 as three stages. Expansion section 17 (17A
17B and 17C). The inlet 18 extends rearward from the upper end of the rear end of the airbag 13 and projects in a cylindrical shape so that it can be connected to and mounted on the inflator 35. The vertical inflatable portion 16 is provided in each horizontal inflatable portion 17.
An upper end 16a is disposed near the inflow port 18 so that the expansion can be completed more quickly.
A connecting portion 26 connected to a guide cord 32 of the guide member 31 which will be described later is arranged on the vehicle outside O on the b side. In the case of the embodiment, when the inflation gas G flows into the gas inflow portion 14, the rear end 22a of the thickness regulating portion 22 described later so that the vertical inflation portion 16 completes the inflation more quickly. The side is bent and formed so as to narrow the opening on the side of the vertical inflatable portion 16 which is the rear end side of each horizontal inflatable portion 17. The non-inflow portion 20 has a peripheral portion 21 disposed around the periphery of the airbag 13 so as to surround the gas inflow portion 14.
And a plate-shaped portion 24. further,
The non-inflow portion 20 is a peripheral portion 21 on the front side of the airbag 13.
And two (in the embodiment, two) thickness regulating portions 22 extending rearward from the horizontal inflating portion 17 and extending upward from the peripheral edge portion 21 on the upper edge 13a side of the airbag 13. And the mounting portion 23 of the above. Each mounting portion 23 is provided with a mounting hole 23a through which a mounting bolt 29 is inserted. Each mounting part 23
As shown in FIG. 1, a backing plate 28 is attached and is fixed to the inner panel 1a on the body 1 side using bolts 29. The plate-shaped portion 24 is provided to secure the entire shape of the airbag 13 and to reduce the volume of the gas inflow portion 14 to shorten the time until the deployment and inflation are completed. The plate-like portion 24 has a substantially triangular plate shape, is disposed on the front end side of the airbag 13, and attaches the mounting portion 23 disposed at the tip end 24 a to the inner panel 1 a on the body 1 side below the front pillar portion FP. Is fixed. In other words, the plate-like portion 24 has a front end portion, which is one end in the front-rear direction of the airbag 13 distant from a guide member 31 described later, and has a front pillar portion FP as a vertical edge arranged substantially vertically in the periphery of the window SW. To be fixed. As shown in FIG. 1, the inflator 35 has a substantially cylindrical shape as a cylinder type.
3, the rear end of the inflow port 18 is externally connected, and is connected to the airbag 13 using a clamp (not shown). The inflator 35 is attached and fixed to the upper edge of the rear window RW of the rear wall portion 7 with the lower edge 4a of the roof head lining 4 using the mounting bracket 36. As shown in FIGS. 1 and 2, the guide member 31 includes a guide string 32 made of a flexible wire and a plurality of guide pins 33 fixed to the inner panel 1a at the rear pillar RP. , Is composed of. The guide string 32 is formed in a loop shape wound around each guide pin 33, and
And a connection part 32a connected to the connection part 26 of the first embodiment. The connecting portion 32a is formed of a string material having flexibility similar to that of the guide string 32, and the connecting portion 32a
The length of a, when the door portion 5a of the garnish 5 is opened,
The length is set so that the door portion 5a does not interfere with the airbag 13 and hinder the deployment of the airbag 13. Each guide pin 33 is composed of a shaft portion 33a fixed to the inner panel 1a, and a roller portion 33b rotatably held at the end of the shaft portion 33a on the inside I of the vehicle. In the case of the embodiment, six guide pins 33 (33A, 33B, 33C, 33D, 33E,
33F) is used, and the upper and lower guide pins 33A are used.
・ Guide pins 33C, 33D, 33 at the intermediate position of 33B
E · 33F is displaced to the front edge side of the rear pillar portion RP,
It is arranged so as to bypass the belt anchor BA, the slide rail SR, the shoulder belt cover BC and the like of the seat belt SB arranged on the rear pillar RP. The guide cord 32 is arranged such that the connecting portion 32a is disposed in front of the vehicle V on the guide cord 32 so that the connecting portion 32a does not interfere with the guide pins 33A, 33C, 33D. Roller part 3
The guide pins 33C and 33 correspond to approximately the upper half circumference in 3b.
D for approximately 1/4 of the front side of the roller portion 33b, the guide pin 33B for approximately a half of the lower side of the roller portion 33b, and the guide pins 33E and 33F for approximately 1/4 of the front side of the roller portion 33b. It is wound sequentially. The roller portion 33b of each guide pin 33
Is shaped like a drum so that the guide string 32 is hard to come off. Next, the mounting of the head protection airbag device M of the embodiment on the vehicle V will be described. First, after the airbag 13 is deployed flat, the lower edge 13b approaches the upper edge 13a. In such a manner, a large number of folds are formed along the front-rear direction, and the bellows are folded. Then, it is appropriately wrapped with a breakable tape material (not shown) for preventing breakage. Thereafter, the backing plate 31 is attached to each attachment portion 23. In addition, while using the clamp,
To the inflator 35, and then around it,
The mounting bracket 36 is attached, and the inflator 35 is assembled to the airbag 13 to form an airbag assembly. Each guide pin 33 is connected to the inner panel 1.
a, and the guide string 32 is wound around the roller portion 33b of each guide pin 33. Thereafter, each mounting portion 23 is attached to the mounting bolt 32
And the mounting bracket 35 is mounted and fixed to the inner panel 1a using bolts, and the connecting portion 32a extending from the guide cord 32 is connected to the connecting portion of the airbag 13. 26, the airbag assembly can be attached to the body 1 of the vehicle V. Then, a lead wire (not shown) extending from the inflator 35 is connected to a predetermined airbag operation circuit, and the front pillar garnish 3 is attached and fixed to the inner panel 1a at the front pillar portion FP, and the roof side rail portion RR Then, the inner panel 1a
The roof head lining 4 is attached and fixed to the vehicle, and further, the slide rail SR, the shoulder belt cover BC, the belt anchor BA of the seat belt SB, etc. are attached to the rear pillar portion R.
The garnish 5 of the rear pillar portion RP is attached to the inner panel 1a of the body 1 and the inner panel 1 of the body 1.
If fixed to a, the head protection airbag device M can be mounted on the vehicle V. Thereafter, when the inflator 35 is operated, the inflation gas G flows from the inflow port 18 to the inflow port 15.
Flows into the vertical inflatable portions 16 and the horizontal inflatable portions 17 to break the tape material (not shown).
Push the lower edges 3a and 4a of the pillar garnish 3 and the roof head lining 4 as shown in FIG. 1 to the inside of the vehicle to open them, and project downward from the upper edge side of the window SW as shown by a two-dot chain line in FIG. 1 and a solid line in FIG. The airbag 13 covers the inside of the window SW and the rear pillar RP. At this time, in the head protection airbag device M of the embodiment, when the inflation gas G flows into the airbag 13, the airbag 13 firstly uses the vertical inflation portion 16 as an initial inflation portion. Complete deployment and inflation. Therefore, the guide string 32 that connects the connecting portion 32a to the connecting portion 26 disposed near the lower end 16b of the vertical inflatable portion 16 includes a plurality of wound guide pins 33A, 33B, 33C, 33D, and 3.
3E and 33F, slides and moves in a loop, and connects the connecting portion 26 of the airbag 13 to each of the guide pins 33A, 33B, 33C, 33D, 33E,
Along the trajectory wound around 33F, guide pin 33A
The guide is moved from the vicinity to the vicinity of the guide pin 33B through the vicinity of the guide pins 33C and 33D. When the connecting portion 26 moves to the vicinity of the guide pin 33B, the vertical inflating portion 16 completes inflation, and the lateral inflating portions 17A, 17B, and 17C, which are the other inflation inflow portions 15 of the airbag 13, also complete inflation. The lower edge 13b of the airbag 13
A tension in the front-rear direction is generated on the side, so that the occupant restraint performance can be enhanced. That is, the airbag 13 is
2 to each guide pin 33 of the guide string 32.
Is moved along the trajectory of the airbag 13 and deployed and inflated. If there is a space for disposing the guide string 32, the connecting portion 26 of the airbag 13 with the guide string 32 can be seated as in the embodiment. It is also possible to bend and guide the belt SB so as to detour interference objects such as the belt anchor BA, slide rail SR, and shoulder belt cover BC. As a result, the degree of freedom in arranging the guide member 31 is increased, and the guide string 32 and the guide pin 33 as the guide member 31 are smoothly arranged in the vehicle V on which various obstacles are arranged. The guide cord 32 and the guide pin 33 as the guide member 31 can accurately guide the deployment and inflation of the airbag 13 to deploy and inflate the airbag 13. If the guide string 32 and the guide pin 33 as the guide member 31 complete the guide of the airbag 13 accurately, tension can be generated at the lower edge 13b of the airbag 13; The airbag 13 is
It is possible to protect the occupant accurately. Therefore, in the head protection airbag device M of the embodiment, the degree of freedom of the arrangement of the guide member 31 can be improved, and the guided portion 26 of the expanding and inflating airbag 13 is not linear, Even if it is bent, it can be guided accurately, and the airbag 13 can be deployed and inflated smoothly. In the airbag 13 of the embodiment, when the deployment and inflation are completed, the connecting portion 26 is arranged behind the vehicle V by the guide of the guide string 32. Reduces the width dimension in the front-rear direction. The end side of the airbag 13 away from the connecting portion 26, that is, the tip 24a side of the plate portion 24 is a vertical edge (front pillar portion F) of the periphery of the window SW away from the connecting portion 26.
It is connected to the lower part on the P) side. As a result, the airbag 13 that has completed the deployment and inflation generates tension in the front-rear direction on the lower edge 13b side. In the head protection airbag device M of the embodiment, when the airbag 13 is deployed and inflated, the guide string 32
Is connected to the interference object (slide rail SR
The belt is moved so as to bend forward so as not to interfere with the belt cover BC etc. Of course, if there is no interfering object, as shown in FIGS.
3 (33A and 33B) are disposed at two positions above and below the rear pillar portion RP, and the guide string 32 is wound around the upper half of the roller portion 33b of the guide pin 33A for approximately half the circumference, and the roller portion of the guide pin 33B is wound. The connecting portion 26 may be linearly guided between the guide pins 33A and 33B when the airbag 13 is deployed and inflated by being wound around substantially the lower half of the circumference 33b. By the way, in the embodiment, as the interference,
Although the slide rail SR, the belt cover BC and the like have been illustrated, other examples include a speaker and a room light. Further, in the embodiment, the airbag device M
Although the single cab vehicle is shown as the vehicle V on which the vehicle is mounted, the head protection airbag device M of the present invention may be mounted on a pickup vehicle or a sedan type vehicle including a double cab vehicle or the like. Further, the connecting portion 26 connected to the guide cord 32 provided on the airbag 13 may be provided not only at the end of the airbag 13 but also at an intermediate portion in the front-rear direction of the airbag. However, when the inflation gas G flows into the airbag 13 at the beginning, the connecting portion 26 is in the vicinity of the protruding end of the portion where the inflation is completed, for example, the lower end 1 of the longitudinal inflation portion 16.
It is preferable that the other inflatable portion be configured to complete the inflation in a state in which the guide movement by the guide cord 32 is substantially completed by being connected near 6b. Therefore, the connecting portion 2
In the case where the airbag 6 is disposed at an intermediate portion in the front-rear direction of the airbag 13, the position of the inflator 35 is made closer, or the flow of the inflation gas is changed, so that the airbag It is desirable to dispose the initial vertical inflating portion of the above.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view of a head-protecting airbag device according to an embodiment of the present invention, as viewed from the inside of a vehicle, showing a vehicle-mounted state. FIG. 2 is a schematic cross-sectional view taken along the line II-II in FIG. FIG. 3 is a view of the airbag used in the embodiment in a state where the airbag is deployed flat, as viewed from the outside of the vehicle. FIG. 4 is a cross-sectional view showing the airbag of the embodiment when it is inflated, and corresponds to a section IV-IV in FIG. 3; FIG. 5 is a front view of the airbag device according to the embodiment when the airbag device is operated, as viewed from the inside of the vehicle. FIG. 6 is a front view showing a state in which the airbag device according to a modification of the embodiment is mounted on a vehicle, as viewed from the inside of the vehicle. FIG. 7 is a front view of the airbag device shown in FIG. 6 when the airbag device is operated, as viewed from the inside of the vehicle. [Description of Signs] 1 ... (body) body, 1a ... inner panel, 13 ... airbag, 26 ... (guided part / connection part with guide string) connection part, 31 ... guide member, 32 ... guide string, 32a: connection portion, 33: guide pin, mounting portion, V: (vehicle) single cab vehicle, SW: window, M: head protection airbag device.

Claims (1)

Claims: 1. An airbag that is folded and stored on the periphery of a window of a vehicle and that can be expanded and inflated to cover the window when an inflation gas flows, and connected to the airbag. And a guide member which is mounted on the vehicle body side and is arranged so as to be able to guide the deployment of the airbag. A head protection airbag device comprising: A flexible loop-shaped guide string partially connected to the airbag, and the guide string wound around the vehicle body side so as to guide the sliding of the guide string when the airbag is deployed. A head protection airbag device, comprising: a plurality of hooked guide pins;