JP6507011B2 - Curtain airbag mounting structure - Google Patents

Description

  The present invention relates to a curtain airbag mounting structure, and more particularly, to a curtain airbag mounting structure in which an inflator and a contracted bag are installed in a longitudinally extended state at a side upper position in a vehicle compartment.

  The curtain airbag extends from the front pillar to the rear pillar along the roof side rail extending in the front-rear direction at the side upper position in the vehicle compartment in order to protect the occupant's head and the like in the vehicle compartment at the time of a side collision. It is arranged. Such curtain airbags are provided with an inflator for injecting high pressure gas in order to deploy the folded bag instantaneously. For example, an inflator is provided in the vicinity of the center pillar of the roof side rail to deploy the bag instantaneously without causing a time difference in the front-rear direction.

  As a mounting structure in the vicinity of such a center pillar, for example, Patent Document 1 shows a mounting structure of a curtain airbag. In this structure, the inflator 12 is held by an inflator bracket fixed by bolts around the center pillar of the roof side rail 106, and the bag 10 is connected at the upper end to the outer surface of the cylindrical inflator 12 (FIG. 3 of the patent document 1 and the like), and is installed in a state in which the inflator 12 is enclosed by this joint.

  FIG. 4 schematically shows an example of a structure mounted in the same manner as the curtain air bag mounting structure described in Patent Document 1 mentioned above. The bag 10 is held below the inflator 12 in a state of being wound and folded on the roof side rail 106 side. The bag 10 in the folded state is wrapped around the adhesive tape 40 together with the inflator 12 as shown, and held together at a position along the roof side rail 106. The fixing portion (not shown) of the inflator bracket is provided on the wall surface of the roof side rail 106 on the back side of the portion where the inflator 12 and the bag 10 are installed.

  As described above, by winding the inflator 12 and the bag 10 with the adhesive tape 40, both are put together in a compact configuration.

  Further, Patent Document 2 shows a mounting structure of a curtain airbag having another structure. FIG. 5 schematically shows a structure attached in the same manner as the curtain airbag attachment structure described in Patent Document 2. As shown in FIG. Elements in FIG. 5 that are the same as elements shown in FIG. 4 are given the same reference numerals, and detailed descriptions thereof will be omitted. As shown, in the inflator bracket 50 for holding the inflator 12, the clip 54 is inserted through the through hole formed at one end thereof, and the clip 54 is further inserted into the through hole similarly formed in the roof side rail 106. It is fixed by inserting.

  Next, the bag 10 is fixedly attached to the roof side rail 106 like the inflator 12 by inserting the clip 54 into the through hole formed on one end side of the bag holding member. Thus, the inflator 12 and the bag 10 are firmly fixed in the vicinity of the roof side rail 106 with a gap. In FIG. 4 and FIG. 5, reference numeral 108 is a roof trim which covers the installation portion of the bag 10 and the inflator 12 as a whole.

JP, 2011-73523, A JP 2007-131172 A

  However, since the inflator bracket in the technique of Patent Document 1 is fixed to the inflator and the roof side rail on the back side of the airbag as described above, the inflator held by the inflator bracket is between the ceiling surface It is still arranged with extra space. Therefore, the result is to narrow the in-vehicle space by the extra space.

  Further, since the fixing portion of the inflator bracket is disposed on the roof side rail on the back side of the inflator and the airbag, when fixing the inflator bracket to the roof side rail, the gap between the airbag and the inflator is expanded. It was necessary to insert and use a fixing device, and it was necessary to be careful not to damage the air bag during the operation.

  Furthermore, when the adhesive strength of the adhesive tape connecting the inflator and the air bag is reduced due to age deterioration or the like, the air bag can not be maintained at the position along the roof side rail. In particular, the cloth of the air bag may be coated, and in such a case, the function of the adhesive tape may be difficult to exhibit. As a result, the air bag hangs down below the inflator and is separated from the side wall of the passenger compartment, which makes it difficult to properly maintain the air bag deployment direction.

  Further, in the technique of Patent Document 2, since the fixing portion of the inflator bracket is provided between the held inflator and the airbag, a space for providing the fixing portion is required on the roof side panel. Become. Therefore, the entire curtain airbag requires a large space in the vicinity of the roof side panel.

  The present invention has been made in view of the above problems, and an object thereof is a simple configuration capable of stably maintaining an appropriate deployment direction of an airbag without narrowing a vehicle cabin space more than necessary. Another object of the present invention is to provide a mounting structure of a curtain airbag.

In order to solve the above object, the invention according to claim 1 relates to an inflator and a curtain airbag mounting structure in which a contracted bag is installed in a state of being extended in the front-rear direction at a side upper position in a vehicle compartment. A fixture fixed to a ceiling near the side of the cabin while holding the flexible bag, and a flexible bag holding member having one end attached to the fixed part of the fixture and the other end attached to the bag And the fixing portion is provided closer to the center in the vehicle width direction than the position at which the inflator is held, and the bag holding member is attached to the bag from the fixing portion to which the one end is attached. was being established is routed to the vehicle side wall of the inflator in a state of being held by the fixture to the other end, the bag than said inflator Characterized in that it is set to a length that is held at the position of the side walls side.

  According to this configuration, since the attachment for holding the inflator is fixed to the ceiling portion, the inflator can be positioned near the ceiling portion first. In that state, the bag can be positioned near the inflator by the bag holding member. In particular, since the bag holding member is installed by winding the vehicle side wall side of the inflator from the fixed portion attached at one end to the other end attached to the bag, the length of the bag holding member should be properly set. Thus, the bag can be drawn closer to the side wall of the vehicle than the inflator.

  Furthermore, since the inflator and the air bag are installed near the ceiling, an extra space is not generated between the components and the ceiling, so that the installation space can be reduced.

  In this manner, by setting the bag holding member to an appropriate length, the bag is held by the bag holding member in a state of being in contact with the inflator from the side wall side of the vehicle and partially supported by the inflator. Therefore, it is stably maintained in the position by the side wall of vehicles rather than the above-mentioned fixed part, and, therefore, a bag can be developed in the suitable direction along the side wall of vehicles, and the function of a bag is exhibited more appropriately. Can.

  According to the present invention, it is possible to stably maintain the proper deployment direction of the bag, and to achieve the reduction of the installation space because the surplus space is not generated between the installed inflator and the bag and the ceiling. Can.

It is a schematic perspective view for demonstrating the attachment structure of the curtain airbag which concerns on embodiment of this invention. It is explanatory drawing of the attachment structure of the curtain airbag which concerns on embodiment of this invention which showed the II-II line cross section in FIG. 1 typically. It is explanatory drawing of the method of attaching the edge part of a bag holding | maintenance member to the fixing | fixed part of a fixture. It is a schematic sectional drawing for demonstrating the attachment structure of the curtain airbag of patent document 1. FIG. It is a schematic sectional drawing for demonstrating the attachment structure of the curtain airbag of patent document 2. FIG.

  Hereinafter, an embodiment of a curtain airbag mounting structure according to the present invention will be described in detail with reference to the drawings.

  FIG. 1 shows a curtain airbag mounting structure according to an embodiment of the present invention. As shown, the cylindrical inflator 12 and the cylindrical bag 10 in the folded state in the wound state are ceilings located near the center pillar 100 in the passenger compartment and at the upper side of the passenger compartment. It is installed in the vicinity of the portion 104 and the roof side rail 106 in a state of being extended in the front-rear direction of the cabin. The attachment of the bag 10 and the inflator 12 is performed by the bracket 102 fixed to the ceiling portion 104 and the attachment 14 attached thereto, as described later. The bag 10 extends from near the front pillar (not shown) to near the rear pillar (not shown).

  FIG. 2 schematically shows a cross section taken along line II-II of FIG. As shown in the drawing, the characteristic feature of the present invention is that the fixing of the bag 10 and the inflator 12 is not the roof side panel 106 disposed on the side of the cabin but the structure on the ceiling 104 side in the vicinity thereof. Is being done for That is, at a predetermined position of the ceiling portion 104, fixing is performed using a bracket 102 provided in the vicinity of the roof side panel 106, and the fixture 14 is fixed to the bracket 102.

  Also, as described later, the bag 10 is held by the bag holding member 16 using the attachment 14. The attached portions of the bag 10 and the inflator 12 are entirely covered with a roof trim 108.

  FIG. 3 is an exploded perspective view for explaining the installation structure of the fixture 14 and the bag holding member 16. As illustrated, the fixture 14 is formed of a metal plate-like member, the upper flat portion is the fixing portion 14a, and the through hole 15 is formed in the substantially central portion. Band-like arms 14b and 14c extend from both side edges of the fixing portion 14a. The arms 14b and 14c are curved and extend, and the inflator 12 is held on the back side. The small holes 21-1 and 21-2 are formed in the fixing portion 14a at positions near both edges thereof, and are fixed to the ceiling portion 104 by the bolts 22 and 23 in this portion as described above. It is attached to the bracket 102.

  In the present embodiment, a band member 17 (only one side in the figure is shown) is attached to the back surface side of the arms 14b and 14c, and the inflator 12 is wound around and held by the band member 17. It is.

  The bag holding member 16 for attaching the bag 10 is formed of, for example, a flexible flexible member, which is a cloth member in the present embodiment, and has a belt shape. A hole 19 is provided at one end 16 a of the bag holding member 16. The hole 19 is a hole for fixing the end 16a of the bag holding member 16 to the fixture 14 as described later, and the clip 20 is inserted therethrough. The other end 16 b of the bag holding member 16 is fixed to the bag 10 (indicated by a broken line in the figure).

  With this component, the inflator 12 and the bag 10 are attached to the ceiling portion 104 (bracket 102) as shown in FIG. What is important is that the mounting position of the inflator 12 and the bag 10, and the arms 14b and 14c of the fixture 14 extend toward the side wall of the vehicle, so the inflator 12 and the bag 10 It is arrange | positioned rather than the fixing position to the bracket 102 in the fixing | fixed part 14a of 14 on the side wall side of a vehicle.

  That is, first, the inflator 12 is positioned closer to the vehicle side wall than the fixing portion 14 a of the attachment 14 in a state of being wound around the band member 17 on the back surface of the arms 14 b and 14 c of the attachment 14. The bag 10 is supported by hanging in a state of being fixed to the other end 16 b of the bag holding member 16. That is, the clip 20 is inserted into the hole 19 at one end 16 a of the bag holding member 16, and the bag holding member 16 is fixed to the attachment 14 at the through hole 15 of the attachment 14.

  The belt-like bag holding member 16 is located on the roof side panel 106 side of the inflator 12 in a state of being held by the fixture 14 with the one end 16a fixed to the fixing portion 14a as a base point, that is, the vehicle side wall side. It is laid around and installed.

  The length of the bag holding member 16 is supported by hanging the bag 10 in a state where one end 16a is fixed by the through hole 15. In this state, the bag 10 is further attached to the roof side panel 106 than the inflator. It is set to a length that can be held close.

  According to the installation configuration of the bag 10 and the inflator 12, since the bag 10 is always accurately maintained at a position close to the side wall of the vehicle, the expansion direction at the time of operation of the air bag can be kept well at all times. Further, since the fixture 14 is fixed to the structure of the ceiling portion 104 of the vehicle, the inflator 12 and the bag 10 can be held at a higher position, and the installation of the inflator 12 and the bag 10 is possible. Since the space required for the vehicle can be limited to the upper narrow space, a wider vehicle space is also achieved.

  Although the embodiment has been variously described above, the present invention is not limited to the configuration according to the above-described embodiment, and various modifications can be made within the scope of the invention. For example, the attachment structure and shape of the fixture 14 attached to the ceiling portion 104 are not limited to the above configuration, and one side can be fixed to the ceiling portion 104, and the other side is the vehicle side wall more than the fixed position. It is sufficient if it has a configuration capable of holding the inflator 12 at the side position, and various shapes can be selected.

  Although the bag holding member 16 is in the form of a belt, the present invention is not limited to this, and it may be in the form of a string as long as it has flexibility and can hold the bag 10 in a hanging manner. It is possible to use a thing of various shapes, such as a thing.

DESCRIPTION OF SYMBOLS 10 bag 12 inflator 14 attachment 14a fixing part 14b, 14c arm 15 through hole 16 bag holding member 16a, 16b end 17 band member 19 hole 20 clip 21-1 and 21-2 small hole 22 and 23 bolt

Claims (1)

In a curtain airbag mounting structure in which an inflator and a bag in a contracted state are installed in a state of being extended in the front-rear direction at a side upper position in a vehicle compartment,
A fixture fixed to a ceiling near the side of the cabin with the inflator held in place;
A flexible bag holding member attached at one end to the fixed part of the attachment and at the other end to the bag;
The fixing portion is provided closer to the center in the vehicle width direction than a position at which the inflator is held.
The bag holding member is installed around the vehicle side wall side of the inflator held by the fixture from the fixed portion to which the one end is attached to the other end attached to the bag . A curtain airbag mounting structure, wherein the bag is set to a length that is held at a position closer to a vehicle side wall than the inflator .

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