JP2006001549A - Occupant restraint system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To stably supply gas from an inflator to an airbag through a gas supplying pipe. <P>SOLUTION: The air bag 21 is disposed in the side of a roof in a folded state, and the inflator 35 is connected to a middle portion in a fore-and-aft direction of gas distribution passages 21a, 21b of the airbag 21 through the gas supplying pipe 36. A cell 21d of the airbag 21 is expanded with gas generated by the inflater 35 at the time of collision of a vehicle, and deployed in a curtain shape along the inner surface of the side of the cabin. The gas supplying pipe 36 extends in a vertical direction immediately before being connected to the gas distribution passages 21a, 21b, and fixed to a vehicle body by a fixing member 39 at a part extending in the vertical direction. Therefore, the gas supplying pipe 36 is prevented from moving due to impact when the airbag 21 is expanded by gas from the inflator 35. Consequently, gas is stably supplied into the airbag 21. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  According to the present invention, a folded airbag is arranged along a side of a roof, and the airbag is inflated with a gas generated by an inflator at the time of a vehicle collision so as to be deployed in a curtain shape along an inner surface of the side of the passenger compartment. The present invention relates to an occupant restraint device.

Such an occupant restraint device is known, for example, from Patent Document 1 below. This occupant restraint device integrates a front-seat airbag and a rear-seat airbag by connecting them with a connecting cloth, and connects the gas supply port provided at the rear end of the front-seat airbag and the front end of the rear-seat airbag. The gas supply port provided is connected to both the front and rear ends of a connecting pipe (gas supply pipe) connected to the inflator, and the gas generated by the inflator is passed through the connecting pipe to the front seat airbag and the rear seat airbag. It comes to supply.
JP 2002-19567 A

  By the way, the conventional occupant restraint device is connected to the gas supply port of the front seat airbag and the gas supply port of the rear seat airbag, and is not fixed to the vehicle body. The gas supply pipe may move due to an impact when the airbag is inflated by the gas from the inflator, and the supply of gas to the airbag may become unstable.

  The present invention has been made in view of the above-described circumstances, and an object thereof is to enable stable supply of gas from an inflator to an airbag via a gas supply pipe.

  To achieve the above object, according to the first aspect of the present invention, an airbag including a plurality of cells branched downward from a gas distribution passage extending along the upper edge of the base fabric is provided on the side of the roof. The inflator is connected to an intermediate part in the front-rear direction of the gas distribution passage of the airbag via a gas supply pipe, and the airbag cell is inflated with the gas generated by the inflator when the vehicle collides. In the occupant restraint device that deploys in a curtain shape along the inner surface of the side of the gas supply pipe, the gas supply pipe extends in the vertical direction immediately before being connected to the gas distribution passage, and is fixed to the vehicle body at the portion extending in the vertical direction. An occupant restraint device is proposed.

  According to the invention described in claim 2, in addition to the structure of claim 1, the inflator is arranged in the side portion of the roof in parallel with the gas distribution passage, and the gas supply pipe extends from the inflator in the longitudinal direction of the vehicle body. An occupant restraint device is proposed which is bent downward and connected to a gas distribution passage.

  According to the invention described in claim 3, in addition to the configuration of claim 1 or claim 2, the gas supply pipe is bifurcated, and one of them is connected to the front gas supply port of the gas distribution passage. In addition, an occupant restraint device is proposed in which the other side is connected to the rear gas supply port of the gas distribution passage.

  According to the configuration of the first aspect, the gas supply pipe for supplying gas from the inflator to the airbag extends in the vertical direction immediately before being connected to the gas distribution passage, and is fixed to the vehicle body at the portion extending in the vertical direction. Therefore, it is possible to suppress the movement of the gas supply pipe due to an impact when the airbag is inflated by the gas from the inflator, and to stably supply the gas to the airbag.

  According to the configuration of claim 3, one and the other of the gas supply pipe extending from the inflator are connected to the front gas supply port and the rear gas supply port of the gas distribution passage, respectively. It can be distributed to the front gas supply port and the rear gas supply port with a simple structure.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below 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. FIG. 3 is an enlarged view of a main part of FIG. 2, FIG. 4 is an exploded perspective view of an occupant restraint device, FIG. 5 is an enlarged view of 5 part of FIG. 3, and FIG. FIG. 7 is an explanatory diagram of a process for connecting the inflator to the airbag.

  As shown in FIG. 1, the RV vehicle including the front row seat 11, the center row seat 12, and the rear row seat 13 includes an A pillar 14, a B pillar 15, a C pillar 16, and a D pillar 17, and the A pillar 14 and A front door 18 is disposed between the B pillars 15, a rear door 19 is disposed between the B pillars 15 and the C pillars 16, and a tailgate 20 is disposed behind the D pillars 17. The folded airbag 21 of the occupant restraint device C is stored in the longitudinal direction of the vehicle body along the side portion of the roof 22 sandwiched between the A pillar 14 and the D pillar 17. 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 is apparent from FIGS. 2 to 4, the airbag 21 is formed by sewing 32 sheets of base fabric 31 of two sheets, and has a cylindrical front side and rear side extending in the front-rear direction along the upper edge thereof. Side gas distribution passages 21a, 21b, a plurality of cells 21c that branch downward from the front gas distribution passage 21a to protect the heads of the occupants of the front row seats 11, and a rear gas distribution passage 21b. , And a plurality of cells 21d for branching downward from the rear row seat 13 and protecting the head of the passenger in the rear row seat 13 by branching downward from the rear gas distribution passage 21b. A plurality of cells 21e are provided.

  A non-inflatable portion 21f to which no gas is supplied is formed in front of the occupant cells 21c of the front row seat 11, and is formed between the occupant cells 21c of the front row seat 11 and the occupant cells 21d of the central row seat 12. Is formed with a non-expandable portion 21g to which no gas is supplied, and a non-expandable portion 21h to which no gas is supplied is formed between the occupant cell 21d of the central row seat 12 and the occupant cell 21e of the rear row seat 13. Is done. A plurality of attachment portions 21 i formed along the upper edge of the airbag 21 are fixed to the roof 22, the A pillar 14, and the D pillar 17.

  The folded airbag 21 is wrapped by cloth covers 33 and 34 that are divided into two parts in the front and rear direction. Each of the covers 33 and 34 is formed in a cylindrical shape by sewing along the lower edge, and the airbag is formed by breaking the perforated rupture portions 33a... 34a. 21 allows expansion. A plurality of attachment portions 21i formed along the upper edge of the airbag 21 protrude upward through openings 33b formed on the upper surfaces of the covers 33 and 34. The folded airbag 21 may be wrapped with a single belt-like cloth.

  As apparent from FIGS. 3 to 5, the inflator 35 is disposed on the side of the roof 22 facing the upper end of the C pillar 16. The gas supply pipe 36 extending forward from the end of the inflator 35 is bent downward and then bifurcated into the front and rear, and the front gas outlet 36a is connected to the front gas supply port 21j at the rear end of the front gas distribution passage 21a. The gas outlet 36b at the rear end is inserted into the rear gas supply port 21k at the front end of the rear gas distribution passage 21b and fixed at the fixed band 38. At this time, the base cloth 31 is cut into a trapezoidal shape below the front and rear gas supply ports 21j and 21k so as not to interfere with the fixed bands 37 and 38, thereby forming an opening 21m.

  As is apparent when referring to FIG. 6, the fixing member 39 is fitted to the portion of the gas supply pipe 36 extending in the vertical direction, and two bolts 41 penetrating both ends of the fixing member 39 and the roof panel 40. , 41 are screwed into weld nuts 42, 42 provided on the back surface of the roof panel 40.

  FIG. 7A shows a state in which the sewing 32 of the base fabric 31 of the airbag 21 is completed. In this state, the front gas distribution passage 21a and the rear gas distribution passage 21b are connected to each other. The partial gas supply port 21j and the rear gas supply port 21k are not opened.

  Subsequently, as shown in FIG. 7 (b), the base cloth 31 is extended from the peripheral edge to the opening 21m along the cutting line L passing through the communication portion between the front and rear gas distribution passages 21a and 21b. By cutting, as shown in FIG. 7C, the front gas supply port 21j and the rear gas supply port 21k are opened at the cut portion. Thus, the gas outlets 36a, 36b of the gas supply pipe 36 are inserted into the front gas supply port 21j and the rear gas supply port 21k opened by the cutting, respectively, and fixed by the fixing bands 37, 38.

  Next, the operation of the embodiment of the present invention having the above configuration will be described.

  When a side collision or rollover of the vehicle is detected by the acceleration sensor, the inflator 35 is actuated by a command from the electronic control unit, and the gas accumulated in the inflator 35 passes through the gas supply pipe 36 before and after the airbag 21. The gas distribution passages 21a, 21b are supplied to the cells 21c, 21d, 21e,. As a result, the airbag 21 accommodated along the side of the roof 22 in the folded state is inflated, and the airbag 21 is deployed downward into the vehicle interior through an opening formed by pushing down the roof garnish with the pressure. The front cell 21c of the deployed airbag 21 protects the occupant's head of the front row seat 11, the central cell 21d protects the occupant's head of the central row seat 12, and the rear cell 21e ... The head of the passenger in the rear row seat 13 is protected.

  If the gas supply pipe 36 moves with a load when the airbag 21 is inflated, stable gas supply from the inflator 35 to the airbag 21 cannot be performed. However, the gas supply pipe 36 is fixed to the roof panel 40 by the fixing member 39. By fixing, it is possible to prevent the gas supply pipe 36 from moving and to supply a stable gas.

  The front and rear gas distribution passages 21a and 21b are connected to a front gas supply port 21j that supplies gas to the front gas distribution passage 21a and a rear gas supply port 21k that supplies gas to the rear gas distribution passage 21b. Since it is configured by cutting the base fabric 31 at a portion, the number of processing steps can be reduced as compared with the case where the front and rear gas supply ports 21j and 21k are configured independently. Moreover, since the gas outlets 36a and 36b before and after branching into the bifurcated portion of the gas supply pipe 36 extending from the inflator 35 are connected to the front gas supply port 21j and the rear gas supply port 21k, respectively, the gas from the inflator 35 is simplified. The structure can be distributed to the front gas supply port 21j and the rear gas supply port k.

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

  The fixing member 39 for fixing the gas supply pipe 36 of the first embodiment is formed as a separate member from the gas supply pipe 36, but the fixing member 39 of the second embodiment is integrated with the gas supply pipe 36 by welding. . Thereby, workability | operativity of the fixing operation | work of the gas supply pipe 36 by the fixing member 39 can be improved.

  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.

  For example, in the embodiment, the airbag 21 is configured by sewing 32 of the base fabric 31. However, it can be configured by bonding or jacquard weaving (seamless).

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 2 is an enlarged view of the main part of FIG. Exploded perspective view of occupant restraint system 5 enlarged view of FIG. 6-6 enlarged sectional view of FIG. Explanatory drawing of the process of connecting the inflator to the airbag The figure corresponding to the said FIG. 6 based on 2nd Example of this invention.

Explanation of symbols

21 Airbag 21a Gas distribution passage 21b Gas distribution passage 21c Cell 21d Cell 21e Cell 21j Front gas supply port 21k Rear gas supply port 22 Roof 31 Base cloth 35 Inflator 36 Gas supply pipe

Claims (3)

The airbag (21) having a plurality of cells (21c, 21d, 21e) branched downward from the gas distribution passages (21a, 21b) extending along the upper edge of the base fabric (31) is provided on the roof (22) side. The inflator (35) is connected to the middle part in the front-rear direction of the gas distribution passage (21a, 21b) of the airbag (21) via the gas supply pipe (36) so that the inflator is in a collision state. In an occupant restraint device in which cells (21c, 21d, 21e) of the airbag (21) are inflated with gas generated by (35) and deployed in a curtain shape along the inner side surface of the passenger compartment.
The occupant restraint device characterized in that the gas supply pipe (36) extends in the vertical direction immediately before being connected to the gas distribution passage (21a, 21b), and is fixed to the vehicle body at a portion extending in the vertical direction.   The inflator (35) is arranged on the side of the roof (22) in parallel with the gas distribution passages (21a, 21b), and the gas supply pipe (36) is bent downward after extending from the inflator (35) in the vehicle longitudinal direction. The occupant restraint device according to claim 1, wherein the occupant restraint device is connected to the gas distribution passages (21a, 21b). The gas supply pipe (36) is bifurcated, one of which is connected to the front gas supply port (21j) of the gas distribution passage (21a, 21b) and the other is the rear portion of the gas distribution passage (21a, 21b). The occupant restraint device according to claim 1 or 2, wherein the occupant restraint device is connected to a gas supply port (21k).

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