JP2010215104A - Airbag - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce bag manufacturing cost by achieving a stable deployment shape and reducing the number of man-hours for joining work. <P>SOLUTION: A bag shape is formed by directly joining a part of a peripheral portion of a first main panel 2 facing an occupant to a part of a peripheral portion of a second main panel 3 positioned on a counter-occupant side facing the first main panel 2 and by cross-joining a peripheral portion of a sub panel 4 to remaining portions not being directly joined to each other at peripheral portions of both the main panels 2, 3. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention is an airbag for inflating and deploying to protect an occupant when an impact of a predetermined level or more is applied to a vehicle such as an automobile, and in particular, deploying from the side of a seat of an automobile along the side of the occupant. It relates to an airbag.

  The airbag is used for an airbag device called a side airbag device that inflates and deploys to the side of an occupant of an automobile and protects the occupant at the time of a side collision, for example. An airbag stored in a folded state on the side of the seat is inflated and deployed between the occupant and the door by the gas supplied from the inflator to protect the occupant side.

  An airbag used in such an airbag device is formed such that a pair of base fabric panels are overlapped and the outer peripheral portions are joined together by sewing or the like so that the inflated and deployed shape is a flat bag shape.

  In addition, an airbag intended to stably deploy the airbag in a predetermined position has already been proposed because the inflated and deployed shape of such an airbag makes the thickness dimension substantially constant not only in the central portion but also in the entire outer periphery. (See Patent Document 1).

  According to this conventional technique, the airbag includes a first panel portion that faces the occupant and a second panel that is positioned on the side opposite to the occupant of the first panel portion and faces the first panel portion. And a third panel portion for connecting the peripheral portions of the first panel portion and the second panel portion, respectively, and the first and second panel portions are substantially identical in shape to each other And the third panel portion is constituted by a single strip-shaped base fabric, and the first panel portion and the third panel portion, and the second panel portion and the third panel portion, Are joined and connected in a state where their peripheral portions are overlapped, so that they are flattened along the occupant.

JP 2006-281968 A

  In the conventional airbag having such a configuration, the third panel portion is coupled to the first panel portion and the second panel portion, respectively. It can not be made, it becomes almost an average thickness dimension including the outer peripheral part, a stable deployment shape can be obtained, swinging during deployment can be suppressed, and it can be easily deployed at a desired position For example, it is possible to reliably protect a narrow area such as the side of the main part of the occupant and the chest.

  However, in consideration of the joining operation of each panel for making such a conventional airbag, the joining operation is performed over the entire peripheral portion of the first panel portion and the entire peripheral edge portion of the third panel. It is necessary to join the entire peripheral part of the panel part and the entire length of the peripheral part of the third panel, which takes time for the joining work and increases the bag manufacturing cost of the airbag.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an airbag that obtains a stable deployed shape, reduces the number of man-hours for joining work, and reduces bag making costs.

  The airbag according to the present invention includes a part of the periphery of the first main panel facing the occupant and the periphery of the second main panel positioned on the side opposite to the occupant facing the first main panel. A part is directly joined, and at least part of the remaining part not joined directly to each other in the peripheral part of the main panels is formed into a bag shape by bridging the peripheral part of the sub-panel. To do.

  According to the present invention having such a configuration, at least part of the remaining part of the peripheral part that is not directly joined by directly joining part of the peripheral part of the first main panel and the second main panel to each other. Is only joined to the peripheral edge of the sub-panel, reducing the man-hours for joining and reducing the bag-making cost. Thus, swinging during deployment can be suppressed and deployed at a desired position, and for example, a narrow area such as the main part of the occupant and the side of the chest can be reliably protected.

  Moreover, you may make it the airbag which concerns on this invention comprise the subpanel in the said invention by the several subpanel piece which became a mutually separate structure.

  With this configuration, the expanded and deployed shape can be more reliably formed into a desired shape due to the presence of the plurality of sub-panel pieces in which the sub-panels are separated from each other.

  In the present invention, by directly joining a part of each peripheral part of the first main panel and the second main panel, at least a part of the remaining part of the peripheral part not directly joined to the peripheral part of the sub-panel. Since it is only joined, the joining man-hours can be reduced and the bag-making cost can be reduced, and the presence of the sub-panel makes the inflated and deployed shape a stable and almost desired shape. Thus, a narrow region such as the main part of the occupant and the side of the chest can be reliably protected.

It is a front view which shows the joining state of the airbag which employ | adopted Example 1 which concerns on this invention. It is AA sectional drawing in FIG. Similarly, it is the perspective view which drawn the state before joining about the 1st and 2nd main panel and sub panel which comprise an airbag. Similarly, it is a front view for explaining a process of joining predetermined joint portions of the first main panel and the second main panel. It is BB sectional drawing of FIG. Similarly, it is the same sectional view as FIG. 5 for demonstrating the process of joining the predetermined joining location of a 1st main panel and a sub panel from the state shown in FIG. It is the same sectional drawing as FIG. 2 of the airbag which employ | adopted Example 2 which concerns on this invention. It is a front view which shows the joining state of the airbag which employ | adopted Example 3 which concerns on this invention. Similarly, it is the perspective view which drawn the state before joining about the 1st and 2nd main panel and sub panel which comprise an airbag. It is CC sectional drawing of FIG. It is DD sectional drawing of FIG.

  The airbag according to the present invention reduces the joining work man-hours by suppressing the swinging during deployment by deploying the inflated deployment shape to a stable and almost desired shape and deploying it to a desired position. Thus, the bag-making cost can be reduced.

  Next, the Example concerning the airbag of this invention is described using figures.

  First, a first embodiment according to the present invention will be described with reference to FIGS.

  The airbag 1 according to the first embodiment of the present invention includes, for example, a 315 denier, 62 / inch nylon base fabric, which is opposed to the first main panel 2 and the first main panel 2 facing the occupant. The second main panel 3 having substantially the same shape with respect to the first main panel 2 located on the side opposite to the occupant, and the sub-panels connecting the peripheral portions of the first main panel 2 and the second main panel 3 respectively. 4.

  Then, a part of the peripheral portion of the first main panel 2, that is, the lower side, and a part of the peripheral portion of the second main panel 3, that is, the lower side are, as shown in FIG. The inflator attachment portion 6 for attaching an inflator (not shown) is left, and the main panel joint portion 10b is formed by direct joining by sewing with nylon yarn or the like or adhesion with a silicone resin adhesive.

  Further, the sub-panel 4 has, for example, a substantially disk-like shape in an unfolded state, corresponding to the upper side of the first main panel 2 and the second main panel 3 being formed in an arc shape. As shown in FIG. 3, it is bent so that it is divided into two parts from the center line, and one half of the peripheral edge is directly connected to the second part directly in the peripheral part of the first main panel 2. Join the remaining part of the main panel 3 that is not directly joined to the peripheral part, that is, the upper part (for example, the part that protects the base of the occupant's arm) by sewing with nylon thread or by bonding with a silicone resin adhesive. Has been.

  In the first embodiment, the upper sides of the first main panel 2 and the second main panel 3 are formed in an arc shape, and in relation to this, the sub-panel 4 is formed in a substantially disk shape in an unfolded state. However, the present invention is not limited to this, and the upper sides of the first main panel 2 and the second main panel 3 are formed in a straight line, and the shape of the sub-panel 4 is also related to this. You may make it form so that the shape of the upper side of 1 main panel 2 and 2nd main panel 3 may be adapted.

  And the other half part side of the peripheral part in the sub-panel 4 is a remaining part that is not directly joined to a part of the peripheral part of the first main panel 2 in the peripheral part of the second main panel 3, that is, the upper side (for example, The sub-panel joint portion 10a is formed by joining to the occupant's arm base periphery) by sewing with nylon thread or the like or bonding with a silicone resin adhesive.

  Therefore, the sub-panel 4 forms a “town” that should also be referred to as a side base fabric of the airbag 1 and bridges and connects the first main panel 2 and the second main panel 3.

  Further, when the peripheral portion of the sub-panel 4 is joined to the upper side which is the remaining portion of the peripheral portion of the first main panel 2 and the second main panel 3 by the sub-panel joining portion 10a, the first main panel 2 and the second main panel 2 A portion where the peripheral portion of the sub-panel 4 is not joined is formed in a part of the upper side of the main panel 3 of the second, and this portion is configured as a gas exhaust hole 5. As a result, a part of the peripheral portion of the sub-panel 4 is joined to the remaining portions of the peripheral portions of the first main panel 2 and the second main panel 3. However, when the gas exhaust hole 5 is formed by, for example, drilling the second main panel 3, the entire peripheral portion of the sub-panel 4 is the periphery of the first main panel 2 and the second main panel 3. It will join to the whole remainder of a part.

  As a result, the airbag 1 is formed in a substantially flat bag shape in its inflated and deployed form.

  The gas exhaust hole 5 adjusts the internal pressure of the airbag 1 by appropriately exhausting the gas in the airbag 1 that has been inflated and deployed. The inflator mounting portion 6 includes the first main panel 2 and the second main panel 2. Attaching the airbag 1 together with an inflator to a side portion of a vehicle, for example, an automobile seat, using fasteners such as bolts and nuts using the mounting holes 7 formed in the main panel 3.

  As a result, the airbag 1 is inflated and deployed from the side of the seat along the side of the occupant with the inflator mounting portion 6 as a base point.

  Next, a process of joining the first main panel 2, the second main panel 3, and the sub panel 4 in the first embodiment will be described with reference to FIGS.

  First, as shown in FIGS. 4 and 5, the joining operation is performed by directly joining the lower peripheral edge of the peripheral portions of the first main panel 2 and the second main panel 3. The joint portion 10b is formed. At this time, the portion corresponding to the inflator mounting portion 6 is left open without being joined.

  Next, as shown in FIG. 6, the peripheral portion of the sub-panel 4 is the remaining portion in which the main panels 2 and 3 in both peripheral portions of the first main panel 2 and the second main panel 3 are not directly joined to each other. It is arranged so as to bridge to the upper side.

  After the bridge is arranged in this manner, the remaining portion of the peripheral portion of the first main panel 2 is joined to the peripheral portion of one half side of the sub-panel 4, and the remaining portion of the peripheral portion of the second main panel 3 is joined. The sub-panel joining portion 10a is formed by joining the remaining half-side peripheral portions of the sub-panel 4 to each other.

  At this time, the remaining portions of the first main panel 2 and the second main panel 3 and the peripheral portion of the sub panel 4 are not joined together, but a portion where the sub panel joining portion 10a is not formed is formed in part. This portion is configured as a gas exhaust hole 5.

  As a result, the substantially flat bag-like airbag 1 with the lower end portion shown in FIGS. 1 and 2 deflated is produced.

  In the first embodiment configured as described above, by directly joining the lower side, which is a part of the peripheral part of the first main panel and the second main panel, in the peripheral part that is not directly joined. Since the remaining part excluding the gas exhaust hole 5 is only joined to the peripheral edge of the sub-panel 4, the number of joining work can be reduced, and the bag-making cost can be reduced. The inflated and unfolded shape becomes a stable and almost desired shape, and can be expanded to a desired position by suppressing swinging during deployment. For example, a narrow area such as the side of the main part of the occupant and the chest can be secured. Can be protected.

  FIG. 7 shows an airbag 1 employing the second embodiment according to the present invention.

  According to FIG. 7, the first main panel 2 and the second main panel 3 directly join the upper side of the airbag 1 as a part of both peripheral portions thereof, and at the remaining portions of the peripheral portions. The lower side of a certain airbag 1 is joined to the peripheral edge of the sub-panel 4 so that the deployed shape of the airbag 1 has a substantially flat bag shape with the upper side deflated.

  With such a configuration, the airbag 1 can select an optimum inflated and deployed location of the airbag 1 in accordance with the peripheral structure of the place where the airbag 1 is installed, and can appropriately protect the occupant.

  8 to 11 show an airbag employing Example 3 according to the present invention.

  In the third embodiment, the sub-panel 4 is composed of sub-panel pieces 4a and 4b, which are a pair of separate structures, whereas a single structure is used in the two embodiments. It is a thing.

  And one subpanel piece 4a is joining the peripheral part to the upper part side of the peripheral part of the 1st main panel 2 by subpanel junction part 10a like the above-mentioned Examples 1 and 2. The other sub-panel piece 4 b is also sub-panel bonded to both peripheral portions of the first main panel 2 and the second main panel 3 on the side portion facing the inflator mounting portion 6 except for the portion corresponding to the gas exhaust hole 5. The two sub-panel pieces 4a and 4b are joined and connected to different parts in a part of the peripheral part of the first main panel 2 and the second main panel 3, A “town” on the side of the airbag 1 is formed.

  Further, the other portions of the peripheral portion of the first main panel 2 and the second main panel 3 where the both sub-panel pieces 4 a and 4 b are not joined are directly joined except for the inflator attachment portion 6.

  With such a configuration, the portions of the peripheral portions of the first main panel 2 and the second main panel 3 where the peripheral portion of the other sub-panel 4b is not joined are joined directly to each other by the main panel joining portion 10b. As a result, the necessary area for joining can be reduced, the number of joining work steps can be reduced, and the bag-making cost can be reduced.

  In addition, with such a configuration, the pair of sub-panel pieces 4a and 4b, which are separated from each other, are present at different parts of the peripheral part of the first main panel 2 and the second main panel 3, so that the air The inflated and deployed shape of the bag 1 is less likely to have a location with a large extreme thickness dimension at the center, becomes a more average thickness dimension including the outer periphery, and can obtain a stable shape, Oscillation at the time of deployment can be suppressed, and it can be easily deployed at a desired position, and for example, a narrow area such as a side of the occupant and the side of the chest can be reliably protected.

  In the third embodiment, the sub panel 4 is composed of a pair of sub panel pieces 4a and 4b. However, the sub panel 4 is not limited to this, and depending on the required inflated and deployed shape of the airbag 1, Furthermore, you may make it comprise with the subpanel piece which consists of many structures.

  As described above, according to the present invention, at least part of the remaining part of the peripheral part that is not directly joined by directly joining part of the peripheral part of the first main panel and the second main panel to each other. Is only joined to the peripheral edge of the sub-panel, reducing the man-hours for joining and reducing the bag-making cost. Therefore, it is possible to suppress swinging during deployment and to deploy it in a desired position, and for example, it is possible to reliably protect a narrow area such as a side of the occupant and the side of the chest. An airbag that inflates and deploys to protect the occupant when an impact of a predetermined level or more is applied to a vehicle such as an automobile, particularly an airbag that is deployed from the side of the seat of the automobile along the side of the occupant. It can be said to be suitable for bags and the like.

DESCRIPTION OF SYMBOLS 1 Air bag 2 1st main panel 3 2nd main panel 4 Sub panel 4a One sub panel piece 4b The other sub panel piece

Claims (2)

  A part of the peripheral part of the first main panel facing the occupant and a part of the peripheral part of the second main panel positioned on the side opposite to the occupant facing the first main panel are directly joined. In addition, the airbag is configured in a bag shape by bridging the peripheral edge portion of the sub-panel to at least a part of the remaining portion that is not directly bonded to each other in the peripheral portion of the main panels.   The airbag according to claim 1, wherein the sub-panel is configured by a plurality of sub-panel pieces that are separated from each other.