JP2018111419A - Air bag for driver seat and air bag device for driver seat - Google Patents

Air bag for driver seat and air bag device for driver seat Download PDF

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Publication number
JP2018111419A
JP2018111419A JP2017003498A JP2017003498A JP2018111419A JP 2018111419 A JP2018111419 A JP 2018111419A JP 2017003498 A JP2017003498 A JP 2017003498A JP 2017003498 A JP2017003498 A JP 2017003498A JP 2018111419 A JP2018111419 A JP 2018111419A
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Prior art keywords
tack
rear panel
driver
portions
half side
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JP2017003498A
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JP6760093B2 (en
Inventor
公裕 越川
Kimihiro Koshikawa
公裕 越川
輝彦 晝田
Teruhiko Hiruta
輝彦 晝田
浩通 吉川
Hiromichi Yoshikawa
浩通 吉川
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Takata Corp
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Takata Corp
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Priority to PCT/JP2017/015892 priority patent/WO2018131180A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/20—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components
    • B60R21/203—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components in steering wheels or steering columns
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/23—Inflatable members
    • B60R21/231—Inflatable members characterised by their shape, construction or spatial configuration
    • B60R21/2334—Expansion control features
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/23—Inflatable members
    • B60R21/237—Inflatable members characterised by the way they are folded

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Air Bags (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide an air bag for driver seat which has the large inflation thickness and in which an occupant facing surface becomes the shape close to the plane over a wide range after inflation completion.SOLUTION: An air bag 1 for driver seat is formed by sewing a front panel 2 and a rear panel 3 together. Tack parts 11-14 are longitudinally and horizontally provided on the rear panel 3. The tack parts 11, 12 are located on the right half side and left half side of the rear panel 3, and the tack parts 13, 14 are located on the upper half side and lower half side of the rear panel 3. The tack parts 11, 12 are formed by folding the right half side and left half side of the rear panel 3 along valley folding lines 11a, 12a and mountain folding lines 11b, 12b. The tack parts 13, 14 are formed by folding the upper half side and lower half side of the rear panel 3 along valley folding lines 13a, 14a and mountain folding lines 13b, 14b.SELECTED DRAWING: Figure 2

Description

本発明は、自動車の衝突時に乗員を拘束するためのエアバッグ及びエアバッグ装置に係り、特に、運転席用のエアバッグ及びエアバッグ装置に関する。   The present invention relates to an airbag and an airbag device for restraining an occupant at the time of a car collision, and more particularly to an airbag and an airbag device for a driver's seat.

ステアリングホイールに設けられた運転席用エアバッグ装置は、車両衝突時等の緊急時にインフレータ（ガス発生器）をガス噴出作動させ、エアバッグにガスを供給して、このエアバッグをステアリングホイールと運転席乗員との間に展開させるよう構成されている。   The airbag device for the driver's seat provided on the steering wheel operates the inflator (gas generator) to eject gas in the event of an emergency such as a vehicle collision, supplies gas to the airbag, and operates the airbag with the steering wheel. It is configured to be deployed with a seat occupant.

運転席用エアバッグとして、フロントパネル及びリアパネルの周縁部同士を縫合したものが知られている。   2. Description of the Related Art As a driver's seat airbag, one in which peripheral portions of a front panel and a rear panel are stitched together is known.

特許文献１には、膨出方向への膨出厚みが大きい運転席用エアバッグとして、乗員側の基布に平行な２条の折返部を設け、乗員側の基布の周縁部とステアリング側の基布の周縁部とを縫合した運転席用エアバッグが記載されている。   In Patent Document 1, as an airbag for a driver's seat having a large bulge thickness in the bulge direction, two folded portions parallel to the base fabric on the occupant side are provided, and the peripheral portion of the base fabric on the occupant side and the steering side A driver's seat airbag is described in which the peripheral edge of the base fabric is stitched.

特開平１１−２０５８６号公報Japanese Patent Laid-Open No. 11-20586

特許文献１の運転席用エアバッグは、膨張した場合、折返部の延在方向に長い楕円球形状となる。この膨張形状の運転席用エアバッグは、乗員が運転席用エアバッグの中心付近で受け止められる場合と、乗員が運転席用エアバッグの中心から外れた部分で受け止められる場合とで拘束性能がかなり異なったものとなる。   When the airbag for driver's seat of patent document 1 expand | swells, it becomes an elliptical spherical shape long in the extension direction of a folding | turning part. This inflated driver's seat airbag has considerable restraint performance when the occupant is received near the center of the driver's airbag and when the occupant is received off the center of the driver's airbag. It will be different.

本発明は、膨張厚みが大きく、しかも膨張完了後の乗員対向面が広い範囲にわたって平面に近い形状となる運転席用エアバッグを提供することを目的とする。   An object of the present invention is to provide an airbag for a driver's seat that has a large inflated thickness and a passenger facing surface after completion of inflating that has a shape close to a plane over a wide range.

本発明の運転席用エアバッグは、フロントパネルとリアパネルの周縁同士を連結してなる運転席用エアバッグにおいて、該リアパネルは、少なくとも第１ないし第４の４条のタック部を備えており、第１及び第２のタック部は、略平行であり、第１のタック部は該リアパネルの中心を挟んで一半側に配置され、第２のタック部は他半側に配置されており、第３及び第４のタック部は、略平行であり、第１及び第２のタック部と交差方向に延在しており、第３のタック部は、リアパネルの中心を挟んで一方の側に配置され、第４のタック部は他方の側に配置されていることを特徴とするものである。   The driver's seat airbag according to the present invention is a driver's seat airbag formed by connecting the peripheral edges of a front panel and a rear panel, and the rear panel includes at least first to fourth four tack portions, The first and second tack portions are substantially parallel, the first tack portion is disposed on one half side with respect to the center of the rear panel, and the second tack portion is disposed on the other half side. The third and fourth tack portions are substantially parallel and extend in a direction intersecting with the first and second tack portions, and the third tack portion is disposed on one side across the center of the rear panel. The fourth tack portion is arranged on the other side.

本発明の運転席用エアバッグ装置は、この運転席用エアバッグと、インフレータとを有する。   The airbag device for a driver's seat according to the present invention includes the airbag for a driver's seat and an inflator.

本発明の一態様では、各タック部は、折り込み部を１条有するシングルタックである。   In one aspect of the present invention, each tack portion is a single tack having a single folded portion.

本発明の一態様では、各タック部は、折り込み部を２条有するダブルタックである。   In one aspect of the present invention, each tack portion is a double tack having two folds.

本発明の一態様では、前記運転席用エアバッグが車両直進姿勢のステアリングに設けられた状態において、第１及び第２のタック部は上下方向に延在しており、前記第３及び第４のタック部は左右方向に延在している。   In one aspect of the present invention, the first and second tack portions extend in the up-down direction in a state where the driver airbag is provided in the steering of the vehicle straight running posture, and the third and fourth The tuck portion extends in the left-right direction.

本発明の運転席用エアバッグのリアパネルには、略平行な第１及び第２タック部と、該第１及び第２タック部と交差方向に延在する略平行な第３及び第４タック部との、少なくとも４条のタック部が設けられている。第１及び第２タック部は、リアパネルの中心を挟んで一半側と他半側に配置されている。第３及び第４タック部は、リアパネルの中心を挟んで一方の側と他方の側に配置されている。   The rear panel of the driver airbag according to the present invention includes substantially parallel first and second tack portions, and substantially parallel third and fourth tack portions extending in a direction intersecting with the first and second tack portions. And at least four tuck portions are provided. The first and second tack portions are arranged on one half side and the other half side across the center of the rear panel. The third and fourth tack portions are arranged on one side and the other side across the center of the rear panel.

この運転席用エアバッグの膨張完了状態にあっては、フロントパネルの直径を大きくすることなく、リアパネルの中心から見て全方向において運転席用エアバッグの膨張厚みが大きいものとなる。また、そのため、乗員対向面が広い範囲にわたって、曲率の小さい平面に近い形状となる。   In a state where the inflation of the driver's seat airbag is completed, the inflation thickness of the driver's seat airbag is large in all directions when viewed from the center of the rear panel without increasing the diameter of the front panel. For this reason, the occupant-facing surface has a shape close to a plane having a small curvature over a wide range.

第１の実施の形態に係る運転席用エアバッグのフロントパネルの平面図である。It is a top view of the front panel of the airbag for driver's seats concerning a 1st embodiment. （ａ）図は第１の実施の形態に係る運転席用エアバッグのリアパネルの平面図、（ｂ）及び（ｃ）図はその折り畳みを示す平面図である。(A) The figure is a top view of the rear panel of the airbag for driver's seats concerning 1st Embodiment, (b) And (c) figure is a top view which shows the folding. フロントパネル及びリアパネルの断面図である。It is sectional drawing of a front panel and a rear panel. 実施の形態に係る運転席用エアバッグの膨張完了時の側面図である。It is a side view at the time of completion of inflation of a driver's seat airbag according to an embodiment. 実施の形態に係る運転席用エアバッグの膨張完了時の正面図（図５のＶ矢視図）である。It is a front view (V arrow view of Drawing 5) at the time of completion of inflation of a driver's seat air bag concerning an embodiment. 第２の実施の形態に係る運転席用エアバッグのリアパネルの平面図である。It is a top view of the rear panel of the airbag for driver's seats concerning a 2nd embodiment. （ａ）図は第２の実施の形態のフロントパネル及びリアパネルの断面図、（ｂ）図は（ａ）図の一部の拡大図である。(A) The figure is sectional drawing of the front panel and rear panel of 2nd Embodiment, (b) A figure is a partial enlarged view of (a) figure.

以下、図面を参照して実施の形態について説明する。   Hereinafter, embodiments will be described with reference to the drawings.

図１〜５は第１の実施の形態に係る運転席用エアバッグ１を示している。このエアバッグ１は、乗員対向面を構成するフロントパネル２と、該乗員対向面と反対側（ステアリング側）を構成するリアパネル３とを備えている。フロントパネル２は円形のパネル（基布）よりなる。   1 to 5 show a driver airbag 1 according to a first embodiment. The airbag 1 includes a front panel 2 constituting an occupant facing surface and a rear panel 3 constituting an opposite side (steering side) from the occupant facing surface. The front panel 2 is a circular panel (base fabric).

リアパネル３は、略円形であるが、周縁部の４箇所に張出部４Ａ〜４Ｄを有する。   Although the rear panel 3 is substantially circular, it has overhang | projection parts 4A-4D in four places of a peripheral part.

リアパネル３の中央にはインフレータ用開口５が設けられ、該インフレータ用開口５の周囲にボルト挿通用の小孔６が設けられている。インフレータ用開口５から所定距離離隔してベントホール７が設けられている。この実施の形態では、ベントホール７は２個設けられている。各ベントホール７，７は、リアパネル３の中心から等距離に位置している。   An inflator opening 5 is provided at the center of the rear panel 3, and a small hole 6 for inserting a bolt is provided around the inflator opening 5. A vent hole 7 is provided at a predetermined distance from the inflator opening 5. In this embodiment, two vent holes 7 are provided. The vent holes 7 and 7 are located at an equal distance from the center of the rear panel 3.

図２は、運転席用エアバッグ１が車両直進状態にあるステアリングに取り付けられた状態におけるリアパネル３の姿勢を示している。ベントホール７，７は、リアパネル３の左半側と右半側にそれぞれ設けられている。ベントホール７，７を結ぶ直線は、車両の幅方向に合致する。   FIG. 2 shows the posture of the rear panel 3 in a state in which the driver's seat airbag 1 is attached to the steering in a straight traveling state of the vehicle. The vent holes 7, 7 are provided on the left half side and the right half side of the rear panel 3, respectively. The straight line connecting the vent holes 7, 7 matches the width direction of the vehicle.

運転席用エアバッグ１の外周縁のうち、張出部４Ａ〜４Ｄ同士の間は、円弧部３Ａ，３Ｂ，３Ｃ，３Ｄとなっている。円弧部３Ａはリアパネル３の上縁に位置し、円弧部３Ｂはリアパネル３の右側縁に位置し、円弧部３Ｃはリアパネル３の下縁に位置し、円弧部３Ｄはリアパネル３の左側縁に位置する。各円弧部３Ａ〜３Ｄの周長は等しい。円弧部３Ａ〜３Ｄの曲率半径は、張出部４Ａ〜４Ｄの外周縁の曲率半径と等しい。   Of the outer peripheral edge of the driver's seat airbag 1, arc portions 3 </ b> A, 3 </ b> B, 3 </ b> C, 3 </ b> D are formed between the overhanging portions 4 </ b> A to 4 </ b> D. The arc portion 3A is located at the upper edge of the rear panel 3, the arc portion 3B is located at the right edge of the rear panel 3, the arc portion 3C is located at the lower edge of the rear panel 3, and the arc portion 3D is located at the left edge of the rear panel 3. To do. The circumference of each arc part 3A-3D is equal. The radius of curvature of the arc portions 3A to 3D is equal to the radius of curvature of the outer peripheral edge of the overhang portions 4A to 4D.

張出部４Ａ〜４Ｄは、リアパネル３の中心から見て右斜め上方、右斜め下方、左斜め下方及び左斜め上方の箇所に位置している。張出部４Ａ〜４Ｄの外周縁は同一曲率半径の円弧状である。各張出部４Ａ〜４Ｄの外周縁の周長は等しい。   The overhang portions 4 </ b> A to 4 </ b> D are located at positions on the upper right, lower right, lower left, and upper left as viewed from the center of the rear panel 3. The outer peripheral edges of the overhanging portions 4A to 4D have an arc shape with the same radius of curvature. The peripheral lengths of the outer peripheral edges of the overhang portions 4A to 4D are equal.

この実施の形態では、リアパネル３の右半側及び左半側を縦方向に縦断する第１及び第２タック部１１，１２と、リアパネル３の上半側及び下半側を左右方向に横断する第３及び第４タック部１３，１４が設けられている。   In this embodiment, the first and second tack portions 11 and 12 that longitudinally cut the right half side and the left half side of the rear panel 3 and the upper half side and the lower half side of the rear panel 3 are traversed in the left-right direction. Third and fourth tack portions 13 and 14 are provided.

タック部１１，１２は、縦方向の谷折り線１１ａ，１２ａに沿ってリアパネル３を谷折りし、縦方向の山折り線１１ｂ，１２ｂに沿ってリアパネル３を山折り（即ち、山折り線１１ｂ，１２ｂが谷折り線１１ａ，１２ａよりもリアパネル３の中央側に重なるように折る）することにより形成される。   The tack portions 11 and 12 fold the rear panel 3 along the vertical valley fold lines 11a and 12a, and fold the rear panel 3 along the vertical mountain fold lines 11b and 12b (that is, the mountain fold line 11b). , 12b are folded so as to overlap the center side of the rear panel 3 with respect to the valley fold lines 11a, 12a.

タック部１３，１４は、左右方向の谷折り線１３ａ，１４ａに沿ってリアパネル３を谷折りし、山折り線１３ｂ，１４ｂに沿ってリアパネル３を山折りすることにより形成される。   The tack portions 13 and 14 are formed by valley-folding the rear panel 3 along the lateral fold lines 13a and 14a and mountain-folding the rear panel 3 along the mountain fold lines 13b and 14b.

谷折り線１１ａは、円弧部３Ａ，３Ｃの右端同士を結ぶ直線であり、山折り線１１ｂは円弧部４Ａ，４Ｂの左端同士を結ぶ直線である。谷折り線１２ａは張出部３Ａの外周縁の左端と、張出部３Ｃの外周縁の左端とを結ぶ直線であり、山折り線１２ｂは張出部４Ｄの外周縁の右端と張出部４Ｃの外周縁の右端とを結ぶ直線である。同様に、横方向の谷折り線１３ａ，１４ａは、それぞれ円弧部３Ｂ，３Ｄの上端同士、下端同士を結ぶ直線であり、山折り線１３ｂ，１４ｂは、張出部４Ａ，４Ｄの外周縁の下端同士、張出部４Ｂ，４Ｃの外周縁の上端同士を結ぶ直線である。   The valley fold line 11a is a straight line connecting the right ends of the arc portions 3A and 3C, and the mountain fold line 11b is a straight line connecting the left ends of the arc portions 4A and 4B. The valley fold line 12a is a straight line connecting the left end of the outer periphery of the overhang portion 3A and the left end of the outer periphery of the overhang portion 3C, and the mountain fold line 12b is the right end of the outer periphery of the overhang portion 4D and the overhang portion. It is a straight line connecting the right end of the outer peripheral edge of 4C. Similarly, the horizontal valley fold lines 13a and 14a are straight lines connecting the upper ends and lower ends of the arc portions 3B and 3D, respectively, and the mountain fold lines 13b and 14b are the outer peripheral edges of the overhang portions 4A and 4D. It is a straight line connecting the lower ends and the upper ends of the outer peripheral edges of the overhang portions 4B, 4C.

この実施の形態では、図２（ｂ）の通り、まず谷折り線１１ａ，１２ａ及び山折り線１１ｂ，１２ｂに沿ってリアパネル３の右半側及び左半側を折ることにより、タック部１１，１２を形成する。次いで、図２（ｃ）の通り、谷折り線１３ａ，１４ａ及び山折り線１３ｂ，１４ｂに沿ってリアパネル３の上半側及び下半側を折ることにより、タック部１３，１４を形成する。ただし、先にタック部１３，１４を形成し、次いでタック部１１，１２を形成してもよい。   In this embodiment, as shown in FIG. 2 (b), first, the right half side and the left half side of the rear panel 3 are folded along the valley fold lines 11a and 12a and the mountain fold lines 11b and 12b. 12 is formed. Next, as shown in FIG. 2C, the tack portions 13 and 14 are formed by folding the upper half side and the lower half side of the rear panel 3 along the valley fold lines 13a and 14a and the mountain fold lines 13b and 14b. However, the tack portions 13 and 14 may be formed first, and then the tack portions 11 and 12 may be formed.

これにより、リアパネル３は円形となる。即ち、張出部４Ａ〜４Ｄの外周縁と、円弧部３Ａ〜３Ｄは、リアパネル３の中心から等半径の円を形成する。   Thereby, the rear panel 3 becomes circular. That is, the outer peripheral edges of the overhang portions 4 </ b> A to 4 </ b> D and the arc portions 3 </ b> A to 3 </ b> D form a circle with an equal radius from the center of the rear panel 3.

フロントパネル２と、このように円形となったリアパネル３の外周縁同士を縫合糸で縫合し、次いで開口５を通してフロントパネル２及びリアパネル３を反転させることにより、運転席用エアバッグ１が形成される。   The driver panel airbag 1 is formed by stitching the front panel 2 and the outer peripheral edges of the circular rear panel 3 with sutures and then inverting the front panel 2 and the rear panel 3 through the opening 5. The

図示は省略するが、この運転席用エアバッグ１は、折り畳まれ、開口５にインフレータが装着され、リテーナに取り付けられ、モジュールカバーが被装され、運転席用エアバッグ装置が構成される。この運転席用エアバッグ装置がステアリングホイール１５（図４）を有したステアリングに装着される。   Although illustration is omitted, the driver's seat airbag 1 is folded, an inflator is attached to the opening 5, attached to a retainer, a module cover is mounted, and a driver's seat airbag device is configured. This driver airbag device is mounted on a steering wheel having a steering wheel 15 (FIG. 4).

このエアバッグ１は、リアパネル３が上下方向及び左右方向にタック部１１〜１４を有しているので、インフレータが作動してエアバッグ１が膨張完了した状態において、リアパネル３の膨張厚み（ステアリング軸心線方向の膨張長さ）Ｔが、全方向においてフロントパネル２の膨張厚みＳよりも十分に大きい。また、これにより、膨張したエアバッグのリアパネルがステアリングに密着しやすくなり、ステアリングからの反力が大きくなる。   In the airbag 1, since the rear panel 3 has the tack portions 11 to 14 in the vertical direction and the horizontal direction, the inflation thickness of the rear panel 3 (steering shaft) in a state where the inflation is completed by the operation of the inflator. The expansion length (T) in the direction of the cord is sufficiently larger than the expansion thickness S of the front panel 2 in all directions. In addition, this makes it easier for the rear panel of the inflated airbag to be in close contact with the steering, and the reaction force from the steering increases.

また、各張出部４Ａ〜４Ｄは、リアパネル３の右上、右下、左下及び左上の４箇所に位置しているので、エアバッグ１は、図５の通り、リアパネル３の中心から右上方向、右下方向、左下方向及び左上方向への膨張長さが、上方、右方、下方及び左方への膨張長さよりも大きい。この結果、エアバッグ１を乗員側から見た形状（図５）は、略正方形状となる。   Moreover, since each overhang | projection part 4A-4D is located in four places of the upper right of the rear panel 3, lower right, lower left, and upper left, the airbag 1 is an upper right direction from the center of the rear panel 3, as FIG. The expansion length in the lower right direction, the lower left direction, and the upper left direction is greater than the expansion length in the upper, right, lower, and left directions. As a result, the shape of the airbag 1 viewed from the passenger side (FIG. 5) is substantially square.

また、タック部１１〜１４を広げた図２（ａ）の状態のリアパネル３の直径は、フロントパネル２の直径よりも大きいところから、膨張したエアバッグ１のフロントパネル２に対し、リアパネル３から加えられる放射方向の張力が大きい。この結果、図４の通り、フロントパネル２の乗員対向面Ｆは、平面に近い形状となる（曲率が小さくなる）。   Further, the diameter of the rear panel 3 in the state of FIG. 2A in which the tack portions 11 to 14 are widened is larger than the diameter of the front panel 2, so that the front panel 2 of the inflated airbag 1 is separated from the rear panel 3. The applied radial tension is large. As a result, as shown in FIG. 4, the occupant facing surface F of the front panel 2 has a shape close to a flat surface (the curvature is reduced).

上記実施の形態では、タック部１１〜１４は、谷折り線１１ａ〜１４ａと山折り線１１ｂ〜１４ｂとの間を折り込んだものであり、図３の通り、それぞれ１条の折り込み部のみを有したシングルタックとなっているが、図６，７に示す第２の実施の形態のように、２条の折り込み部を有したダブルタックとされてもよい。   In the said embodiment, the tack parts 11-14 fold between the valley fold lines 11a-14a and the mountain fold lines 11b-14b, and each has only one fold part as FIG. However, as in the second embodiment shown in FIGS. 6 and 7, it may be a double tack having two folded portions.

図７（ａ），（ｂ）に示すように、ダブルタック構造のタック部１３Ａ，１４Ａは、谷折り線１３ａ，１３ｃ及び１４ａ，１４ｃに沿って谷折りし、山折り線１３ｂ，１３ｄ及び１４ｂ、１４ｄに沿って山折りすることにより形成される。断面の図示は省略するが、タック部１１Ａ，１２Ａも同様にして形成される。   As shown in FIGS. 7A and 7B, the tack portions 13A and 14A of the double tack structure are valley-folded along the valley fold lines 13a and 13c and 14a and 14c, and the mountain fold lines 13b, 13d and 14b are formed. , 14d. Although illustration of a cross section is omitted, the tack portions 11A and 12A are formed in the same manner.

このダブルタック構造のタック部１１Ａ〜１４Ａは、シングルタック構造のタック部１１〜１４に比べてタック部の深さ（折り込み長さ）が大きいので、リアパネル３の膨張厚みＴが第１の実施の形態よりも大きい。   Since the tack portions 11A to 14A of the double tack structure have a larger depth (folding length) than the tack portions 11 to 14 of the single tack structure, the expansion thickness T of the rear panel 3 is the first embodiment. Bigger than the form.

上記実施の形態は本発明の一例であり、本発明は図示以外の形態とされてもよい。例えば、タック部は４条より多く設けられてもよい。   The above-described embodiment is an example of the present invention, and the present invention may be configured other than illustrated. For example, more tuck portions may be provided than four.

また、シングルタックのタック部とダブルタックのタック部との双方を設けてもよい。   Moreover, you may provide both the tack part of a single tack, and the tack part of a double tack.

本発明では、フロントパネルとステアリング側とを連結するテザーを設けてもよい。   In the present invention, a tether that connects the front panel and the steering side may be provided.

１ 運転席用エアバッグ
２ フロントパネル
３ リアパネル
４Ａ〜４Ｄ 張出部
５ インフレータ用開口
７ ベントホール
１１〜１４，１１Ａ〜１４Ａ タック部 DESCRIPTION OF SYMBOLS 1 Driver airbag 2 Front panel 3 Rear panel 4A-4D Overhang part 5 Inflator opening 7 Vent hole 11-14, 11A-14A Tack part

Claims (5)

フロントパネルとリアパネルの周縁同士を連結してなる運転席用エアバッグにおいて、
該リアパネルは、少なくとも第１ないし第４の４条のタック部を備えており、
第１及び第２のタック部は、略平行であり、第１のタック部は該リアパネルの中心を挟んで一半側に配置され、第２のタック部は他半側に配置されており、
第３及び第４のタック部は、略平行であり、第１及び第２のタック部と交差方向に延在しており、第３のタック部は、リアパネルの中心を挟んで一方の側に配置され、第４のタック部は他方の側に配置されていることを特徴とする運転席用エアバッグ。 In the driver's seat airbag formed by connecting the peripheral edges of the front panel and the rear panel,
The rear panel includes at least first to fourth four-tack portions.
The first and second tack portions are substantially parallel, the first tack portion is disposed on one half side across the center of the rear panel, and the second tack portion is disposed on the other half side,
The third and fourth tack portions are substantially parallel and extend in the crossing direction with the first and second tack portions, and the third tack portion is on one side across the center of the rear panel. An airbag for a driver's seat, which is arranged and the fourth tack portion is arranged on the other side. 請求項１において、各タック部は、折り込み部を１条有するシングルタックであることを特徴とする運転席用エアバッグ。   2. The driver's seat airbag according to claim 1, wherein each tack portion is a single tack having a single folded portion. 請求項１において、各タック部は、折り込み部を２条有するダブルタックであることを特徴とする運転席用エアバッグ。   2. The driver's seat airbag according to claim 1, wherein each tack portion is a double tack having two folded portions. 請求項１〜３のいずれか１項において、前記運転席用エアバッグが車両直進姿勢のステアリングに設けられた状態において、第１及び第２のタック部は上下方向に延在しており、前記第３及び第４のタック部は左右方向に延在していることを特徴とする運転席用エアバッグ。   In any one of Claims 1-3, In the state in which the said airbag for driver's seats was provided in the steering | stirring of the vehicle rectilinear attitude, the 1st and 2nd tack part is extended in the up-down direction, The driver's seat airbag, wherein the third and fourth tack portions extend in the left-right direction. 請求項１〜４のいずれか１項に記載の運転席用エアバッグと、該運転席用エアバッグを膨張させるインフレータとを有することを特徴とする運転席用エアバッグ装置。   A driver's seat airbag device comprising: the driver's seat airbag according to any one of claims 1 to 4; and an inflator for inflating the driver's seat airbag.
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US11180108B2 (en) * 2019-03-28 2021-11-23 Toyoda Gosei Co., Ltd. Preparatory folded form of an airbag
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JPH10297402A (en) * 1997-02-25 1998-11-10 Tokai Rika Co Ltd Bag body for air bag device and manufacture of bag body
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