JP2006232275A - Occupant restraint system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an occupant restraint system capable of reliably preventing a folded airbag from being fixed to a vehicle body in a twisted state. <P>SOLUTION: A strip-like projecting part 34d extending along the longitudinal direction is provided on an airbag cover 34 to cover a folded airbag 21, and a plurality of mounting parts 21a discretely provided on an upper portion of the airbag 21 and the strip-like projecting part 34 are jointly fastened to a vehicle body. If the airbag 21 is twisted when being mounted on the vehicle body, the dimension in the longitudinal direction is considerably shrunk, and the spacing of adjacent mounting parts 21a is reduced, and the airbag 21 cannot be fixed to the vehicle body. As a result, the airbag 21 is reliably prevented from being fixed in a twisted state, and smooth development of the airbag 21 can be realized. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an occupant restraint device that deploys a folded airbag from a side of a roof along a side inner surface of a passenger compartment in a curtain shape.

When the airbag of such an occupant restraint device is folded, it becomes a long and slender string. End up. Therefore, it is known from the following patent document that a mark is attached to the surface of the folded airbag, and the folded airbag is attached to the vehicle body so as not to be twisted while visually confirming the mark.
Japanese Patent No. 3113777

  By the way, in the conventional occupant restraint device, the operator visually confirms the mark attached to the surface of the folded airbag and prevents the airbag from being twisted. Therefore, the airbag is twisted due to the operator's mistake. There was a possibility of being attached in a state.

  The present invention has been made in view of the above circumstances, and an object thereof is to reliably prevent a folded airbag from being fixed to a vehicle body in a twisted state.

  In order to achieve the above object, according to the first aspect of the present invention, mounting portions discretely provided at a plurality of locations in the longitudinal direction of the folded airbag are fixed along the side portion of the roof. In an occupant restraint device that inflates an airbag with a gas generated by an inflator at the time of a collision and deploys it in a curtain shape along the inner surface of the side of the passenger compartment, along the longitudinal direction of the airbag outside the folded airbag An occupant restraint device is proposed that is provided with a belt-like protrusion separate from the extending airbag to prevent the airbag from being fixed in a twisted state.

  According to the invention described in claim 2, in addition to the configuration of claim 1, the belt-like projecting portion is provided along the upper edge or the lower edge of the airbag cover that houses the folded airbag. A featured occupant restraint device is proposed.

  According to the invention described in claim 3, in addition to the configuration of claim 1, the belt-like projecting portion is provided along the upper edge of the airbag cover that houses the folded airbag, and the belt-like projection. An occupant restraint device is proposed in which an opening connected to a bridge portion by a bridge portion is formed.

  According to a fourth aspect of the present invention, in addition to the configuration of the first aspect, the belt-like projecting portion is provided along the upper portion of the airbag cover that accommodates the folded airbag and is divided by the dividing portion. An attachment hole is formed in the belt-like projecting portion to be fastened to a mounting portion provided on the upper portion of the airbag, and brackets provided on the vehicle body are fastened to the belt-like projecting portion and the mounting portion at both ends thereof. It is proposed that the belt-like protrusions on both sides of the dividing part are connected and only the attachment part is directly fixed between the both ends.

  According to the fifth aspect of the present invention, the mounting portions provided at a plurality of locations in the longitudinal direction of the upper portion of the folded airbag are fixed along the side portion of the roof, and the gas generated by the inflator at the time of a vehicle collision is used. In an occupant restraint device that inflates an airbag and deploys it in a curtain shape along the inner side surface of a passenger compartment, a flexible protector is provided along the folded airbag, and the protector is mounted on the airbag vehicle. A main body portion extending in a strip shape along the longitudinal direction of the airbag, a strip-shaped projecting portion extending over the entire length along the upper edge of the main body portion, and a lower surface of the airbag from the lower edge of the main body portion. And a protection portion extending toward the vehicle interior side, and the mounting portion is overlapped with the belt-like protruding portion and fastened together.

  According to the configuration of the first aspect, since the belt-like projecting portion extending along the longitudinal direction of the airbag is provided separately from the airbag, the longitudinal direction of the airbag is twisted. When the dimension in the direction is significantly reduced, the interval between the adjacent mounting portions is shortened, and the airbag cannot be fixed. As a result, it is possible to reliably prevent the airbag from being fixed in a twisted state, and to enable the airbag to be smoothly deployed.

  According to the second aspect of the present invention, since the belt-like projecting portion is provided along the upper edge or the lower edge of the airbag cover for storing the folded airbag, the longitudinal dimension is surely secured when the airbag is twisted. Further, the folded airbag and airbag cover can be fastened together with the vehicle body.

  According to the third aspect of the present invention, since the opening is formed in the belt-like protrusion provided along the upper edge of the airbag cover that stores the folded airbag, the belt-like protrusion interferes with other members. Since the opening can be prevented by the opening, and the opening is connected by the bridge portion, it is possible to minimize a decrease in the torsional rigidity of the airbag due to the provision of the opening.

  According to the fourth aspect of the present invention, even if the belt-like protrusion provided along the upper portion of the airbag cover that stores the folded airbag is divided by the dividing portion, both sides of the dividing portion are provided by the bracket provided on the vehicle body. By connecting the belt-like projecting portions, it is possible to make it difficult to twist the folded airbag and to prevent erroneous assembly.

  According to the fifth aspect of the present invention, since the flexible protector is provided along the folded airbag, when the airbag is twisted, the belt-like protruding portion of the protector is also twisted at the same time. By contracting significantly, the interval between the adjacent mounting portions is shortened, making it impossible to fix the airbag. As a result, it is possible to reliably prevent the airbag from being fixed in a twisted state, and to enable the airbag to be smoothly deployed. Moreover, when the airbag is deployed, the protector of the protector can prevent the airbag from being caught by the pillar.

  Hereinafter, embodiments of the present invention will be described based on examples of the present invention shown in the accompanying drawings.

  FIGS. 1 to 7 show a first embodiment of the present invention. FIG. 1 is a view showing a vehicle interior surface when the airbag is not deployed, and FIG. 2 is a vehicle interior when the airbag is deployed. 3 is an enlarged view of part 3 of FIG. 2, FIG. 4 is a sectional view taken along line 4-4 of FIG. 3, FIG. 5 is an exploded perspective view of an occupant restraint device, and FIG. 6 is line 6-6 of FIG. FIG. 7 is an enlarged cross-sectional view, and FIG. 7 is an operation explanatory diagram when the airbag is twisted.

  As shown in FIG. 1, a door opening 14 to which a front door 13 is attached is formed between a front pillar 11 and a center pillar 12 on a side surface of the vehicle body, and a rear door 16 is attached between the center pillar 12 and the rear pillar 15. An opening 17 is formed. A roof side rail (not shown) extending in the longitudinal direction of the vehicle body so as to connect the upper end of the front pillar 11 and the upper end of the rear pillar 15 defines the upper edges of the door openings 14 and 17 of the front door 13 and the rear door 16. An occupant restraint device C is provided along the roof side rail. The occupant restraint device C having substantially the same structure is provided on each of the left and right sides of the vehicle body. Hereinafter, the occupant restraint device C provided on the right side of the vehicle body will be described.

  As shown in FIG. 2, when acceleration of a predetermined value or more is detected at the time of side collision or rollover of the vehicle, the inner side of the vehicle body, that is, the front pillar 11, the center pillar 12, the rear pillar 15, and the door glass of the front door 13. The air bag 21 of the occupant restraint device C is curtained downward from the upper edges of the door openings 14 and 17 so as to be shielded between the door glass 16a of the rear door 16 and the occupant sitting on the front seat 19 and the rear seat 20. Expands into a shape.

  As shown in FIGS. 3 and 4, the airbag 21 extending in the front-rear direction of the vehicle body is obtained by sewing 27 the first base cloth 25 and the second base cloth 26 having substantially the same shape overlapped with each other. 27, a plurality of cells 29 and an upper communication path 30 are formed. The plurality of cells 29... Branch downward from an upper communication path 30 connected to a high-pressure gas supply pipe 31 extending from an inflator 33 housed in the rear pillar 15. The lower ends of these cells 29. It is blocked. A plurality of attachment portions 21 a are formed along the upper communication path 30 of the airbag 21.

  As shown in FIG. 5 and FIG. 6, the airbag cover 34 is formed by forming two rectangular nonwoven fabrics into a cylindrical shape and sewing them at the lower sewing portion 34 a and the upper sewing portion 34 b, and folding the airbag 21 folded inside thereof. A perforated slit 34c that is to be stored and is broken when the airbag 21 is inflated is formed on a side surface outside the vehicle body. A belt-like protrusion 34d extends in the longitudinal direction along the upper part of the upper sewing part 34b, and a plurality of attachment parts 21a ... of the airbag 21 are sandwiched by the belt-like protrusions 34d of the airbag cover 34 and are formed by the upper sewing part 34b. It is sewn together. The mounting portions 21a of the airbag 21 and the belt-like protrusions 34d of the airbag cover 34 are fastened together with a plurality of brackets 37 fixed to the roof 35 with bolts 36 with common bolts 38.

  Next, the operation of the first embodiment will be described.

  When the acceleration sensor detects an acceleration of a predetermined value or more due to a side collision of the vehicle, the inflator 33 is actuated by a command from the airbag deployment control means, and the high pressure gas compressed and filled in the inflator 33 passes through the high pressure gas supply pipe 31. It flows into the upper communication path 30 and each cell 29 ... of the folded airbag 21, and these cells 29 ... are inflated. The slit 34c of the airbag cover 34 is broken by the inflation of the airbag 21, and the airbag 21 that is released from the restraint is deployed downward. Since the edge of the roof garnish is pushed downward by the pressure of the airbag 21 that is deployed to form an opening, the airbag 21 that has passed through the opening is deployed downward into the vehicle interior, and the occupant faces the vehicle interior surface. Restrain the next collision.

  Now, when the folded airbag 21 is covered with the airbag cover 34 and the inflator 33 is attached and then fixed to the bracket 37 of the roof 35 with a plurality of bolts 38, the airbag 21 is fixed in a state of being twisted by mistake. If it is done, smooth development may be hindered.

  As shown in FIG. 7, when the folded airbag 21 is twisted, the airbag 21 contracts in the longitudinal direction, so that the distance between the pair of attachment portions 21a and 21a on both sides of the twisted position decreases from D1 to D2. At this time, when the belt-like protruding portion 34d is not formed on the airbag cover 34 that is twisted together with the airbag 21, the airbag 21 is relatively easy to twist, so the distance reduction amount ΔD becomes small. The pair of attachment portions 21 a and 21 a can be fixed to the brackets 37 and 37.

  However, in the present embodiment, since the belt-like protrusion 34d is formed on the airbag cover 34 that is twisted together with the airbag 21, the airbag 21 is difficult to twist. The reduction amount ΔD of the distance between the pair of attachment portions 21a, 21a becomes large. As a result, the pair of attachment portions 21a and 21a on both sides of the twisted position do not reach the brackets 37 and 37, and it is possible to reliably prevent the airbag 21 from being fixed while being twisted.

  If the width (height) of the belt-like protruding portion 34d is small, the amount of reduction in the longitudinal dimension when the airbag 21 is twisted is not sufficient, so that the belt-like protruding portion can be prevented reliably. The width of 34d is desirably 10 mm or more.

  Next, a first reference example of the present invention will be described with reference to FIG.

  In the first embodiment described above, the belt cover 34 d is provided on the airbag cover 34 that covers the folded airbag 21, but in the first reference example, the belt protrusion 21 b is integrally formed on the upper edge of the airbag 21. is doing. This belt-like protruding portion 21b also has the functions of a plurality of attachment portions 21a ... of the airbag 21 of the first embodiment.

  Next, a second embodiment of the present invention will be described with reference to FIG.

  In the second embodiment, a protector 39 is added to the first reference example described above. The protector 39 is formed of an extremely thin synthetic resin or the like so as to be easily bent, and includes a main body portion 39a extending in a strip shape along the longitudinal direction of the folded airbag 21, and a strip-shaped protrusion 39b extending along the upper edge of the main body portion 39a. And a plurality of protective portions 39c extending from the lower edge of the main body portion 39a so as to hold the lower surface of the airbag 21 at positions corresponding to the front pillar 11, the center pillar 12, or the rear pillar 15. When the belt-like protrusion 21b of the airbag 21 is fixed to the brackets 37 with the bolts 38, the belt-like protrusion 39b of the protector 39 is overlapped with the belt-like protrusion 21b of the airbag 21 and fastened together.

  When the airbag 21 breaks the airbag cover 34 and deploys downward, the protection portion 39c of the protector 39 extends along the front pillar 11, the center pillar 12, or the rear pillar 15, so that the airbag 21 is front pillar. 11, it is possible to prevent the center pillar 12 or the rear pillar 15 from being caught and to enable smooth deployment.

  In the second embodiment, when the folded airbag 21 is twisted, the belt-like protrusion 39b of the protector 39 and the belt-like protrusion 21b of the airbag 21 are simultaneously twisted, so that the airbag 21 is reduced in the longitudinal dimension. It can be made sufficiently large to prevent the occurrence of misassembly more reliably.

  In the second embodiment, the belt-like protrusion 21b of the airbag 21 can be eliminated, and the protector 39 of the second embodiment can be combined with the first embodiment.

  Next, a third embodiment of the present invention will be described with reference to FIG.

  The third embodiment is a modification of the first embodiment described above. In the first embodiment, the belt-like protrusion 34d is formed along the upper edge of the airbag cover 34, whereas in the third embodiment, A belt-like protrusion 34 d is formed along the lower edge of the airbag cover 34.

  The operation and effects of the third embodiment are the same as those of the first embodiment.

  Next, a fourth embodiment of the present invention will be described with reference to FIG.

  The fourth embodiment is a modification of the first embodiment described above, in which openings 34e... Are formed in a belt-like protrusion 34d provided along the upper edge of the airbag cover 34 of the first embodiment. The openings 34e are provided so that, for example, when a member such as an assist grip is fixed to the roof 35, the member does not interfere with the belt-like protrusion 34d of the airbag cover 34. What is important here is that the opening 34e is not notched. If a notch is formed so as to be released at the upper edge of the belt-like protrusion 34d, the airbag 21 is easily twisted despite the provision of the belt-like protrusion 34d, and the effect of preventing misassembly is exhibited. However, if the opening 34e... Is connected at the upper edge by the bridge portions 34f..., The resistance against twisting of the airbag 21 is increased, and the effect of preventing misassembly can be secured.

  Next, a fifth embodiment of the present invention will be described with reference to FIG.

  5th Example is a countermeasure plan in case the strip | belt-shaped protrusion part 34d of the airbag cover 34 is parted by the parting part 34g. The bracket 41 fixed to the vehicle body with a bolt 40 includes a fixing portion 41a for fixing a predetermined mounting portion 21a of the airbag 21 with a bolt 38, and both ends of the fixing portion 41a are arranged in the longitudinal direction of the airbag 21. The two rivets 42 and 42 are connected to the belt-like protrusions 34d on both sides of the dividing portion 34g.

  Thus, even if the airbag 21 is easily twisted by providing the dividing portion 34g, it is difficult to twist by connecting the dividing portion 34g with the fixing portion 41a of the bracket 41, and the occurrence of misassembly is surely prevented. can do.

  Next, a sixth embodiment of the present invention will be described with reference to FIG.

  In the sixth embodiment, the airbag cover 34 is formed by bending a single non-woven fabric, and a torsion preventing member 43 made of a cylindrical bar 34i formed of a synthetic resin round bar formed by a sewing portion 34h along the upper edge thereof. Is inserted. The airbag 21 is fixed by fastening the belt-like protrusion 34d of the airbag cover 34 and the attachment portions 21a of the airbag 21 together with bolts 38, as in the first embodiment.

  Instead of providing the twist preventing member 43 above the belt-like protrusion 34d, as shown in FIG. 13C, it can be provided below the belt-like protrusion 34d.

  According to the sixth embodiment, even if the folded airbag 21 is to be twisted, it cannot be twisted because the twist preventing member 43 resists, and therefore, the wrong assembly of the airbag 21 is surely prevented. .

  Next, a seventh embodiment of the present invention will be described with reference to FIG.

  In the sixth embodiment described above, the twist preventing member 43 is arranged over the entire length of the airbag 21, but in the seventh embodiment, the twist preventing members 43, 43 divided into two parts are arranged at the front portion of the airbag 21. Arranged at the rear. With this configuration, it is easy to fix the folded airbag 21 along the curved upper edges of the door openings 14 and 17.

  In the seventh embodiment, there is a possibility that the airbag 21 may be twisted between the two twist prevention members 43, 43. However, since the portion where the airbag 21 may be twisted is limited, the twist is prevented. Even if it occurs, it can be easily discovered.

  As mentioned above, although the Example of this invention was explained in full detail, this invention can perform a various design change in the range which does not deviate from the summary.

The figure which shows the interior of a car when the airbag is not deployed The figure which shows the interior surface of the car when the airbag is deployed Part 3 enlarged view of FIG. Sectional view taken along line 4-4 in FIG. Exploded perspective view of occupant restraint system 6-6 enlarged sectional view of FIG. Action explanatory diagram when the airbag is twisted The figure which shows the 1st reference example of this invention The figure which shows 2nd Example of this invention The figure which shows 3rd Example of this invention The figure which shows 4th Example of this invention The figure which shows 5th Example of this invention The figure which shows 6th Example of this invention The figure which shows 7th Example of this invention

Explanation of symbols

21 Airbag 21a Attaching part 33 Inflator 34 Airbag cover 34d Band-like protrusion 34e Opening 34f Bridge part 34g Dividing part 35 Roof 39 Protector 39a Body part 39b Belt-like protrusion 39c Protection part 41 Bracket

Claims (5)

Gases generated by the inflator (33) in the event of a vehicle collision by fixing attachment portions (21a) discretely provided at a plurality of locations in the longitudinal direction of the folded airbag (21) along the side of the roof (35). In the occupant restraint device that inflates the airbag (21) and deploys it in a curtain shape along the inner side surface of the passenger compartment,
By providing a belt-like protrusion (34d, 39b) separate from the airbag (21) extending along the longitudinal direction of the airbag (21) outside the folded airbag (21), 21) An occupant restraint device characterized in that it is prevented from being fixed in a twisted state.   The occupant restraint device according to claim 1, wherein the belt-like projecting portion (34d) is provided along an upper edge or a lower edge of an airbag cover (34) for storing the folded airbag (21). .   The belt-like protrusion (34d) is provided along the upper edge of the airbag cover (34) that houses the folded airbag (21), and is connected to the belt-like protrusion (34d) by a bridge portion (34f). The occupant restraint device according to claim 1, wherein an opening (34 e) is formed.   The belt-like protrusion (34d) is provided along the upper portion of the airbag cover (34) that houses the folded airbag (21) and is divided by the dividing portion (34g). Is formed with a mounting hole to be fastened to a mounting portion (21a) provided at the upper portion of the airbag (21), and brackets (41) provided on the vehicle body are formed at both ends with the belt-like protrusion (34d) and the The belt-like protrusions (34d) on both sides of the dividing portion (34g) are connected together by fastening with the attachment portion (21a), and only the attachment portion (21a) is directly fixed between the both ends. The occupant restraint device according to claim 1. Fixing portions (21a) provided at a plurality of longitudinal positions on the upper portion of the folded airbag (21) are fixed along the side of the roof (35), and air is generated by gas generated by the inflator (33) at the time of a vehicle collision. In the occupant restraint device that inflates the bag (21) and deploys it in a curtain shape along the inner side surface of the passenger compartment.
A flexible protector (39) is provided along the folded airbag (21), and the protector (39) is disposed on the outer side in the vehicle width direction of the airbag (21) in the longitudinal direction of the airbag (21). A main body portion (39a) extending in a strip shape along the upper surface of the main body portion (39a), a belt-shaped protrusion (39b) extending over the entire length along the upper edge of the main body portion (39a), and an airbag from the lower edge of the main body portion (39a). And a protective part (39c) extending toward the vehicle interior side, and the attachment part (21a) is overlapped with the belt-like protruding part (39b) and fastened together. Restraint device.

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