WO2012073641A1 - Inflator mounting structure for airbag for front passenger seat - Google Patents

Inflator mounting structure for airbag for front passenger seat Download PDF

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Publication number
WO2012073641A1
WO2012073641A1 PCT/JP2011/075293 JP2011075293W WO2012073641A1 WO 2012073641 A1 WO2012073641 A1 WO 2012073641A1 JP 2011075293 W JP2011075293 W JP 2011075293W WO 2012073641 A1 WO2012073641 A1 WO 2012073641A1
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Prior art keywords
metal case
inflator
airbag
mounting structure
passenger seat
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PCT/JP2011/075293
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French (fr)
Japanese (ja)
Inventor
慶 辻本
克也 小森
佳史 土田
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タカタ株式会社
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Priority to CN201180057429.9A priority Critical patent/CN103249603B/en
Publication of WO2012073641A1 publication Critical patent/WO2012073641A1/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
    • B60R21/217—Inflation fluid source retainers, e.g. reaction canisters; Connection of bags, covers, diffusers or inflation fluid sources therewith or together
    • 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
    • B60R21/205—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components in dashboards

Definitions

  • the present invention relates to an inflator mounting structure for a passenger airbag that fastens and fixes an inflator in a metal case that houses the airbag body.
  • Patent Document 1 discloses that a cylindrical inflator is vertically installed with four bolts and nuts in a substantially rectangular metal case that houses an airbag body. Are fastened and fixed.
  • Patent Document 1 since the distance from the four bolts of the inflator to the mounting bracket and the distance from the side wall of the metal case are large, the coupling rigidity between the inflator and the metal case is low, and excessive stress is applied to the metal. There is a problem that occurs in cases and inflators.
  • the metal case is disposed in the front part of the passenger on the dashboard, but recently, an air conditioner for the air conditioner has been arranged in front of the passenger to ensure comfortable air conditioning for the passenger. It is common to install. For this reason, there are restrictions on the space for arranging the airbag, and there is a demand for downsizing the metal case.
  • the present invention has been made in view of the above-described conventional situation, and provides an inflator mounting structure for an airbag for a passenger seat that can improve the coupling rigidity between the metal case and the inflator while reducing the size of the metal case that houses the airbag body.
  • the challenge is to do.
  • an inflator for a passenger's seat airbag wherein an inflator is fastened with a bolt and a nut to a rectangular metal case that houses an airbag body, and the metal case is fixed to a vehicle body component through a mount bracket.
  • the inflator is arranged so that one side of a rectangular fastening line formed by connecting the bolts is inclined with respect to a side wall of the metal case, and a welded portion of the mount bracket to the metal case is provided. , And provided in a triangular region formed by one side of the fastening line and a corner of the metal case.
  • the inflator is disposed so that one side of a rectangular fastening line formed by connecting fastening bolts is inclined with respect to the side wall of the metal case, and the welded portion of the mount bracket to the metal case is provided. Since it is disposed in a triangular region formed by one side of the inclined fastening line and the corner of the metal case, a sufficient welding surface of the mount bracket can be secured even if the metal case is downsized.
  • the distance from the fastening bolt to the welded portion of the side wall of the metal case and the mounting bracket can be reduced.
  • the coupling rigidity of the inflator and the metal case can be improved, and the stress generated in the inflator and the metal case Can be reduced.
  • the mounting bracket is provided in the triangular region, the mounting bracket can be disposed near the center of the metal case as compared with the case where the fastening line is disposed in parallel to the side wall of the metal case, and the metal The case can be downsized.
  • FIG. 1 is a front view of a passenger airbag according to an embodiment of the present invention. It is a top view in the state where the inflator and the retainer were attached to the metal case. It is a disassembled perspective view of the attachment structure of the inflator.
  • FIG. 4 is a sectional side view of the inflator mounting structure (sectional view taken along line IV-IV in FIG. 1).
  • FIG. 1 to 4 are views for explaining an inflator mounting structure for a passenger airbag according to an embodiment of the present invention.
  • the terms “up”, “down”, “left”, and “right” mean “up”, “down”, “left”, and “right” when viewed in the forward direction of the vehicle, unless otherwise specified.
  • reference numeral 1 denotes a passenger seat airbag disposed in the front part of the passenger seat of the dash panel 14.
  • the passenger seat airbag 1 includes an airbag cover 2 that is inserted into the opening 14 a of the dash panel 14, a metal case 4 that is disposed within the airbag cover 2, and a metal case 4 that is disposed within the metal case 4.
  • the inflator 6 fixed to the bottom surface thereof, the airbag main body 3 accommodated in the metal case 4 and arranged to cover the inflator 6, and the airbag main body 3 fixed to the metal case 4
  • a retainer 7 is provided.
  • the airbag cover 2 is made of, for example, resin, and includes a locking wall 2b that has a substantially rectangular tube shape, and a lid 2e that covers the opening of the locking wall 2b and forms a continuous surface with the dash panel 14. Are integrally formed.
  • the lid portion 2e is formed with a planned fracture portion 2c and a plurality of locking claws 2a.
  • the airbag cover 2 locks the locking claws 2a in the opening portion 14a of the dash panel 14. Thus, the arrangement is fixed inside the dash panel 14.
  • the metal case 4 has a substantially square shape in plan view, and has front, rear, left and right side walls 4a and a bottom wall 4b, and one or more upper ends of the side walls 4a.
  • the locking claw 4c is integrally formed by bending. Each of the locking claws 4c is inserted into each locking hole 2d formed at a substantially central portion in the height direction of the locking wall 2b and can be locked.
  • the bottom wall 4b has an opening 4d for inserting the inflator 6, four attachment holes 4e for attaching the inflator 6, and one positioning hole 4f for positioning the inflator 6. Is formed.
  • Each mounting hole 4e is formed near each side wall 4a on the center line A in the front-rear direction and the center line B in the left-right direction of the metal case 4, and the line connecting the mounting holes 4e forms a substantially square shape. .
  • Left and right mounting brackets 5 and 5 are fixed to the left and right corner portions on the rear side of the bottom wall 4b of the metal case 4.
  • the left and right mounting brackets 5 and 5 are made of sheet metal, have a substantially L shape when viewed in the vehicle width direction, and have a longitudinal side 5a extending in the vehicle width direction. 8 is fixed to the bottom wall 4b of the metal case 4 by a spot weld portion 13.
  • the inflator 6 has a main body portion 6a having a cylindrical shape and a flange portion 6b to be attached to the metal case 4.
  • a gunpowder (not shown) for exploding and deploying the airbag 3 is built in the main body 6a, and the gunpowder is disposed around the center point O of the metal case 4. Yes.
  • a plurality of ejection holes 6d are formed in the upper portion of the main body 6a for ejecting gas that is generated when the explosive explodes and inflates the airbag 3.
  • the flange portion 6b is formed so as to protrude from the outer peripheral surface of the main body portion 6a, and has a substantially square shape in plan view. Attachment holes 6e are formed at the four corners of the flange portion 6b. A positioning hole 6f for positioning the inflator 6 is formed at one of the four corners of the flange portion 6b.
  • the retainer 7 is made of sheet metal, has a substantially square shape in plan view, and has a bottom wall 7a and a vertical wall 7b integrally formed so as to rise upward from the outer peripheral edge of the bottom wall 7a.
  • An insertion hole 7c for inserting the main body 6a of the inflator 6 is formed in the bottom wall 7a.
  • fastening bolts 9 are inserted into the four corners of the bottom wall 7a so as to penetrate downward in order to attach the inflator 6 and the airbag body 3 to the metal case 4, and are fixed by welding.
  • a cut-and-raised portion 7e for positioning the inflator 6 is formed at one of the four corners of the bottom wall 7a.
  • the airbag body 3 is formed into a bag shape by a woven fabric made of flexible polyester, polyamide yarn or the like.
  • An insertion hole 3a for inserting the main body portion 6a of the inflator 6, an attachment hole 3b for attachment via the retainer 7, and a positioning hole 3c are formed at predetermined positions of the airbag body 3. Yes.
  • the airbag body 3 is placed on the bottom wall 4b of the metal case 4, and the body portion 6a of the inflator 6 is placed in the opening 4d of the metal case 4. Insert vertically from below to above. Then, the positioning hole 6f of the flange portion 6b of the inflator 6, the positioning hole 4f of the metal case 4 and the positioning hole 3c of the airbag 3 are made to coincide with each other, and the four fastening bolts 9 of the retainer 7 are connected to the airbag 3 While inserting into the mounting hole 3b, the mounting hole 4e of the metal case 4 and the mounting hole 6e of the flange portion 6b, the cut and raised 7e is inserted into the positioning hole 3c and the like, and four fastening nuts 10 are attached to the fastening bolts 9 Fastened and fixed by screwing on the downward projecting portion.
  • one side 9c of the substantially square fastening line 9b formed by connecting the four fastening bolts 9 in a plan view corresponds to one side wall 4a of the metal case 4. It is arranged in an inclined state of 45 °. Therefore, the left and right mounting brackets 5 and 5 are positioned in a triangular region 15 formed by one side 9c of the fastening line 9b and the corner 4g of the metal case 4.
  • the fastening bolts 9 are close to the side walls 4 a of the metal case 4, and one fastening bolt 9 is positioned on a straight line connecting the left and right mounting brackets 5, 5.
  • the metal case 4 containing the airbag body 3 is attached to the reinforcement 8 via the mount brackets 5, 5, and the metal case 4 is inserted into the locking hole 2 d of the airbag cover 2.
  • the passenger's seat airbag 1 is attached to the dashboard 14 by locking the locking claw 4 c and locking the locking claw 2 a to the opening 14 a of the dashboard 14.
  • the inflator 6 is arranged so that one side 9c of a substantially square fastening line 9b formed by connecting the fastening bolts 9 is inclined by 45 ° with respect to the side wall 4a of the metal case 4 in plan view.
  • a triangular region formed by one side 9c of the inclined fastening line 9b and a corner 4g of the metal case 4 with respect to the spot welded portion 13 of the left and right mounting brackets 5 and 5 with the metal case 4 15, the distance from each fastening bolt 9 to each side wall 4 a of the metal case 4 and to the spot welded portion 13 of the mount bracket 5 is shortened, and the inflator 6 and the metal case 4 are reduced accordingly.
  • the joint rigidity can be improved.
  • the fastening line 9 b connecting the fastening bolt 9 is connected to the side wall 4 a of the metal case 4.
  • the rigidity against the load when the airbag body 3 is deployed in the vehicle interior direction can be improved.
  • the mount bracket 5 is arranged in the triangular region 15 portion, the metal case 4 can be made small, and a weld surface of the mount bracket 5 can be sufficiently secured on the bottom wall 4b of the metal case 4.
  • the metal case 4 can be reduced in weight and size.
  • the fastening bolt of this invention is not limited to four pieces.
  • the fastening line 9b formed by connecting the fastening bolt 9 was substantially square was demonstrated, the fastening line of this invention should just be a rectangle.
  • the inclination angle of this invention is not limited to 45 degrees.
  • the left and right mounting brackets 5, 5 are welded to the metal case 4 with a triangle formed by one side 9 c of the inclined fastening line 9 b and the corner 4 g of the metal case 4. It is sufficient to incline it to such an extent that it can be arranged in the area.

Abstract

[Problem] To provide an inflator mounting structure for an airbag for a front passenger seat, the inflator mounting structure being configured in such a manner that a metallic case for housing the airbag is compact and that the inflator and the metallic case are joined together with increased rigidity. [Solution] An inflator (6) is disposed so that, in a plan view, a side (9c) of a substantially square connecting line (9b) formed by connecting multiple bolts (9) is tilted relative to a side wall (4a) of a metallic case (4), and so that the weld (13) at which a mounting bracket (5) is welded to the metallic case (4) is provided within a triangular region (15) formed by the side (9c) of the connecting line (9b) and a corner (4g) of the metallic case (4).

Description

助手席用エアバッグのインフレータ取付構造Inflator mounting structure for passenger seat airbag
　エアバッグ本体を収納する金属ケース内にインフレータを締結固定する助手席用エアバッグのインフレータ取付構造に関する。 [Technical Field] The present invention relates to an inflator mounting structure for a passenger airbag that fastens and fixes an inflator in a metal case that houses the airbag body.
　この種の助手席用エアバッグのインフレータ取付構造として、従来、例えば、特許文献１には、エアバッグ本体を収納する略長方形の金属ケース内に円筒型インフレータを４個のボルト及びナットで縦置に締結固定したものが開示されている。 As an inflator mounting structure for an airbag for a passenger seat of this type, for example, Patent Document 1 discloses that a cylindrical inflator is vertically installed with four bolts and nuts in a substantially rectangular metal case that houses an airbag body. Are fastened and fixed.
特許第４０３９１４０号公報Japanese Patent No. 4039140
　ところでエアバッグにおいては、エアバッグ本体がインフレータ内に装備されている火薬によって爆発展開する際に、前記インフレータから金属ケースを介して車体構成部材に大きな荷重が作用する。 By the way, in an airbag, when the airbag body explodes and deploys with explosives installed in the inflator, a large load acts on the vehicle body component member from the inflator through the metal case.
　前記特許文献１では、インフレータの前記４個のボルトからマウントブラケットまでの距離、及び前記金属ケースの側壁までの距離が大きいため、インフレータと金属ケースとの結合剛性が低く、過大な応力が前記金属ケースやインフレータに発生するという問題がある。 In Patent Document 1, since the distance from the four bolts of the inflator to the mounting bracket and the distance from the side wall of the metal case are large, the coupling rigidity between the inflator and the metal case is low, and excessive stress is applied to the metal. There is a problem that occurs in cases and inflators.
　また、前記金属ケースはダッシュボードの助手席乗員の前方部分に配置されているが、最近では、助手席乗員への快適な空調を確保するためエアコンの風量調節器を前記助手席の前方に配設することが一般的となっている。そのためエアバックの配置スペースに制約が生じており、前記金属ケースの小型化が要請されている。 In addition, the metal case is disposed in the front part of the passenger on the dashboard, but recently, an air conditioner for the air conditioner has been arranged in front of the passenger to ensure comfortable air conditioning for the passenger. It is common to install. For this reason, there are restrictions on the space for arranging the airbag, and there is a demand for downsizing the metal case.
　しかし、前記従来構造では、前記金属ケースにマウントブラケットを溶接固定するためのスペースが大きくなり、金属ケースを小型化するにも限度がある。 However, in the conventional structure, a space for welding and fixing the mounting bracket to the metal case becomes large, and there is a limit to downsizing the metal case.
　本発明は、前記従来の状況に鑑みてなされたもので、エアバッグ本体を収納する金属ケースを小型化しつつ、金属ケース及びインフレータの結合剛性を向上できる助手席用エアバッグのインフレータ取付構造を提供することを課題としている。 The present invention has been made in view of the above-described conventional situation, and provides an inflator mounting structure for an airbag for a passenger seat that can improve the coupling rigidity between the metal case and the inflator while reducing the size of the metal case that houses the airbag body. The challenge is to do.
　請求項１の発明は、エアバッグ本体を収納する矩形の金属ケースにインフレータをボルト及びナットで締結し、前記金属ケースを、マウントブラケットを介して車体構成部材に固定する助手席用エアバッグのインフレータ取付構造において、前記インフレータを、前記ボルトを結んで形成される矩形の締結ラインの一辺が、前記金属ケースの側壁に対して傾くように配置し、前記マウントブラケットの前記金属ケースとの溶接部を、前記締結ラインの一辺と前記金属ケースの隅部とで形成される三角形の領域内に設けることを特徴としている。 According to a first aspect of the present invention, an inflator for a passenger's seat airbag is provided, wherein an inflator is fastened with a bolt and a nut to a rectangular metal case that houses an airbag body, and the metal case is fixed to a vehicle body component through a mount bracket. In the mounting structure, the inflator is arranged so that one side of a rectangular fastening line formed by connecting the bolts is inclined with respect to a side wall of the metal case, and a welded portion of the mount bracket to the metal case is provided. , And provided in a triangular region formed by one side of the fastening line and a corner of the metal case.
　本発明によれば、インフレータを、締結ボルトを結んで形成される矩形の締結ラインの一辺が、金属ケースの側壁に対して傾くように配置するとともに、マウントブラケットの前記金属ケースとの溶接部を、前記傾けた締結ラインの一辺と前記金属ケースの隅部とで形成される三角形の領域内に配設したので、前記金属ケースを小型化しても前記マウントブラケットの溶接面を充分に確保できる。そして金属ケースの小型化によって前記締結ボルトから金属ケースの側壁及びマウントブラケットの溶接部位までの距離を小さくでき、その結果インフレータ，金属ケースの結合剛性を向上でき、前記インフレータ、金属ケースに発生する応力を小さくできる。 According to the present invention, the inflator is disposed so that one side of a rectangular fastening line formed by connecting fastening bolts is inclined with respect to the side wall of the metal case, and the welded portion of the mount bracket to the metal case is provided. Since it is disposed in a triangular region formed by one side of the inclined fastening line and the corner of the metal case, a sufficient welding surface of the mount bracket can be secured even if the metal case is downsized. By reducing the size of the metal case, the distance from the fastening bolt to the welded portion of the side wall of the metal case and the mounting bracket can be reduced. As a result, the coupling rigidity of the inflator and the metal case can be improved, and the stress generated in the inflator and the metal case Can be reduced.
　また、マウントブラケットを前記三角形領域に設けたので、締結ラインを、前記金属ケースの側壁に対して平行に配置した場合に比較して、マウントブラケットを金属ケースの中心に寄せて配置でき、それだけ金属ケースを小型化できる。 Further, since the mounting bracket is provided in the triangular region, the mounting bracket can be disposed near the center of the metal case as compared with the case where the fastening line is disposed in parallel to the side wall of the metal case, and the metal The case can be downsized.
本発明の実施例による助手席用エアバッグの正面図である。1 is a front view of a passenger airbag according to an embodiment of the present invention. 前記金属ケースに前記インフレータ及びリテーナを取り付けた状態の平面図である。It is a top view in the state where the inflator and the retainer were attached to the metal case. 前記インフレータの取付構造の分解斜視図である。It is a disassembled perspective view of the attachment structure of the inflator. 前記インフレータ取付構造の断面側面図（図１のＩＶ－ＩＶ線断面図）である。FIG. 4 is a sectional side view of the inflator mounting structure (sectional view taken along line IV-IV in FIG. 1).
　以下、本発明の実施の形態を添付図面に基づいて説明する。 Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
　図１ないし図４は、本発明の実施例による助手席用エアバッグのインフレータ取付構造を説明するための図である。なお、本実施例において、上，下，左，右という場合は、特記なき限り、車両の前進方向に向かって見た場合の上，下，左，右を意味する。 1 to 4 are views for explaining an inflator mounting structure for a passenger airbag according to an embodiment of the present invention. In this embodiment, the terms “up”, “down”, “left”, and “right” mean “up”, “down”, “left”, and “right” when viewed in the forward direction of the vehicle, unless otherwise specified.
　図において、１はダッシュパネル１４の助手席前方部分に配設された助手席用エアバッグを示している。この助手席用エアバッグ１は、前記ダッシュパネル１４の開口１４ａ内に挿入配置されたエアバッグカバー２と、該エアバッグカバー２内に配置された金属ケース４と、該金属ケース４内に配置され、その底面に固定されたインフレータ６と、前記金属ケース４内に収容され、前記インフレータ６を覆うように配置されたエアバッグ本体３と、該エアバッグ本体３を前記金属ケース４に固定するリテーナ７とを備えている。 In the figure, reference numeral 1 denotes a passenger seat airbag disposed in the front part of the passenger seat of the dash panel 14. The passenger seat airbag 1 includes an airbag cover 2 that is inserted into the opening 14 a of the dash panel 14, a metal case 4 that is disposed within the airbag cover 2, and a metal case 4 that is disposed within the metal case 4. The inflator 6 fixed to the bottom surface thereof, the airbag main body 3 accommodated in the metal case 4 and arranged to cover the inflator 6, and the airbag main body 3 fixed to the metal case 4 A retainer 7 is provided.
　前記エアバッグカバー２は、例えば、樹脂製であり、略矩形の筒状を成す係止壁２ｂと、該係止壁２ｂの開口を覆うとともに前記ダッシュパネル１４と連続面を成す蓋部２ｅとを一体形成したものである。前記蓋部２ｅには、破断予定部２ｃと、複数の係止爪２ａとが形成されており、前記エアバッグカバー２は、ダッシュパネル１４の開口部１４ａに前記係止爪２ａを係止させることにより、前記ダッシュパネル１４の内側に配置固定されている。 The airbag cover 2 is made of, for example, resin, and includes a locking wall 2b that has a substantially rectangular tube shape, and a lid 2e that covers the opening of the locking wall 2b and forms a continuous surface with the dash panel 14. Are integrally formed. The lid portion 2e is formed with a planned fracture portion 2c and a plurality of locking claws 2a. The airbag cover 2 locks the locking claws 2a in the opening portion 14a of the dash panel 14. Thus, the arrangement is fixed inside the dash panel 14.
　前記金属ケース４は、平面視で略正方形を成しており、前，後，左，右の側壁４ａと、底壁４ｂとを有し、前記各側壁４ａの上端には１つ又は複数の係止爪４ｃが一体に折り曲げ形成されている。この各係止爪４ｃは前記係止壁２ｂの高さ方向略中央部に形成された各係止孔２ｄに挿入され、係止可能となっている。 The metal case 4 has a substantially square shape in plan view, and has front, rear, left and right side walls 4a and a bottom wall 4b, and one or more upper ends of the side walls 4a. The locking claw 4c is integrally formed by bending. Each of the locking claws 4c is inserted into each locking hole 2d formed at a substantially central portion in the height direction of the locking wall 2b and can be locked.
　前記底壁４ｂには、前記インフレータ６を挿入するための開口部４ｄと、前記インフレータ６を取り付けるための４つの取付孔４ｅと、前記インフレータ６の位置決めをするための１つの位置決め孔４ｆとが形成されている。前記各取付孔４ｅは、前記金属ケース４の前後方向中心線Ａ及び左右方向中心線Ｂ上の各側壁４ａ寄りに形成されており、各取付孔４ｅを結ぶラインは略正方形を成している。 The bottom wall 4b has an opening 4d for inserting the inflator 6, four attachment holes 4e for attaching the inflator 6, and one positioning hole 4f for positioning the inflator 6. Is formed. Each mounting hole 4e is formed near each side wall 4a on the center line A in the front-rear direction and the center line B in the left-right direction of the metal case 4, and the line connecting the mounting holes 4e forms a substantially square shape. .
　前記金属ケース４の底壁４ｂの後側の左右のコーナ部には、左，右のマウントブラケット５，５が固定されている。該左，右のマウントブラケット５，５は、板金製であり、車幅方向視で略Ｌ字形状を成しており、その縦辺部５ａが車幅方向に延びるリインフォースメント（車体構成部材）８にボルト８ａで固定され、その横辺部５ｂが、前記金属ケース４の底壁４ｂにスポット溶接部１３により固定されている。 Left and right mounting brackets 5 and 5 are fixed to the left and right corner portions on the rear side of the bottom wall 4b of the metal case 4. The left and right mounting brackets 5 and 5 are made of sheet metal, have a substantially L shape when viewed in the vehicle width direction, and have a longitudinal side 5a extending in the vehicle width direction. 8 is fixed to the bottom wall 4b of the metal case 4 by a spot weld portion 13.
　前記インフレータ６は、円筒形状を成す本体部６ａと、前記金属ケース４に取り付けるためのフランジ部６ｂとを有する。前記本体部６ａの内部には、前記エアバッグ３を爆発展開させるための火薬（不図示）が内蔵されており、該火薬は、前記金属ケース４の中心点Ｏを中心にして配設されている。前記本体部６ａの上部には、前記火薬の爆発時に発生して前記エアバッグ３を膨張させるガスを噴出させるための複数の噴出孔６ｄが形成されている。 The inflator 6 has a main body portion 6a having a cylindrical shape and a flange portion 6b to be attached to the metal case 4. A gunpowder (not shown) for exploding and deploying the airbag 3 is built in the main body 6a, and the gunpowder is disposed around the center point O of the metal case 4. Yes. A plurality of ejection holes 6d are formed in the upper portion of the main body 6a for ejecting gas that is generated when the explosive explodes and inflates the airbag 3.
　前記フランジ部６ｂは、前記本体部６ａの外周面から突き出るように形成され、平面視で略正方形を成している。前記フランジ部６ｂの四隅には、取付孔６ｅが形成されている。また、前記フランジ部６ｂの四隅のうちの一隅には、前記インフレータ６の位置決めをするための位置決め孔６ｆが形成されている。 The flange portion 6b is formed so as to protrude from the outer peripheral surface of the main body portion 6a, and has a substantially square shape in plan view. Attachment holes 6e are formed at the four corners of the flange portion 6b. A positioning hole 6f for positioning the inflator 6 is formed at one of the four corners of the flange portion 6b.
　前記リテーナ７は、板金製であり、平面視で略正方形を成しており、底壁７ａと、該底壁７ａの外周縁から上方に立ち上がるように一体形成された縦壁７ｂとを有する。前記底壁７ａには、前記インフレータ６の本体部６ａを挿入するための挿入孔７ｃが形成されている。また前記底壁７ａの四隅には、前記インフレータ６及び前記エアバッグ本体３を金属ケース４に取り付けるため締結ボルト９が下方に貫通するように挿入され、溶接固定されている。また、前記底壁７ａの四隅のうちの一隅には、前記インフレータ６の位置決めをするための切り起こし７ｅが形成されている。 The retainer 7 is made of sheet metal, has a substantially square shape in plan view, and has a bottom wall 7a and a vertical wall 7b integrally formed so as to rise upward from the outer peripheral edge of the bottom wall 7a. An insertion hole 7c for inserting the main body 6a of the inflator 6 is formed in the bottom wall 7a. In addition, fastening bolts 9 are inserted into the four corners of the bottom wall 7a so as to penetrate downward in order to attach the inflator 6 and the airbag body 3 to the metal case 4, and are fixed by welding. Further, a cut-and-raised portion 7e for positioning the inflator 6 is formed at one of the four corners of the bottom wall 7a.
　前記エアバッグ本体３は、可撓性を有するポリエステルやポリアミド糸等から成る織布により袋状に形成されている。前記エアバッグ本体３の所定箇所には、前記インフレータ６の本体部６ａを挿通させるための挿通孔３ａと、前記リテーナ７を介して取り付けるための取付孔３ｂと、位置決め孔３ｃとが形成されている。 The airbag body 3 is formed into a bag shape by a woven fabric made of flexible polyester, polyamide yarn or the like. An insertion hole 3a for inserting the main body portion 6a of the inflator 6, an attachment hole 3b for attachment via the retainer 7, and a positioning hole 3c are formed at predetermined positions of the airbag body 3. Yes.
　本実施例のエアバッグ１の組立てにあたっては、前記エアバッグ本体３を前記金属ケース４の底壁４ｂ上に載置するとともに、前記金属ケース４の開口部４ｄに前記インフレータ６の本体部６ａを下方から上方に縦置に挿入する。そして前記インフレータ６のフランジ部６ｂの位置決め孔６ｆ，前記金属ケース４の位置決め孔４ｆ，前記エアバッグ３の位置決め孔３ｃを一致させるとともに、リテーナ７の４個の締結ボルト９を前記エアバッグ３の取付孔３ｂ，前記金属ケース４の取付孔４ｅ及び前記フランジ部６ｂの取付孔６ｅに挿入しつつ、前記切り起こし７ｅを位置決め孔３ｃ等に挿入し、４個の締結ナット１０を締結ボルト９の下方突出部に螺装することによって締結固定する。 In assembling the airbag 1 of the present embodiment, the airbag body 3 is placed on the bottom wall 4b of the metal case 4, and the body portion 6a of the inflator 6 is placed in the opening 4d of the metal case 4. Insert vertically from below to above. Then, the positioning hole 6f of the flange portion 6b of the inflator 6, the positioning hole 4f of the metal case 4 and the positioning hole 3c of the airbag 3 are made to coincide with each other, and the four fastening bolts 9 of the retainer 7 are connected to the airbag 3 While inserting into the mounting hole 3b, the mounting hole 4e of the metal case 4 and the mounting hole 6e of the flange portion 6b, the cut and raised 7e is inserted into the positioning hole 3c and the like, and four fastening nuts 10 are attached to the fastening bolts 9 Fastened and fixed by screwing on the downward projecting portion.
　これにより、本実施例のインフレータ６は、平面視で、前記４個の締結ボルト９を結んで形成される略正方形の締結ライン９ｂの一辺９ｃが、前記金属ケース４の１つの側壁４ａに対して４５°傾斜した状態に配置されている。そのため前記左，右のマウントブラケット５，５は、前記締結ライン９ｂの一辺９ｃと前記金属ケース４の隅部４ｇとで形成される三角形の領域１５内に位置することとなる。また、前記各締結ボルト９は、前記金属ケース４の各側壁４ａに近接しており、さらに１つの締結ボルト９は左，右のマウントブラケット５，５を結ぶ直線上に位置している。 Thereby, in the inflator 6 of the present embodiment, one side 9c of the substantially square fastening line 9b formed by connecting the four fastening bolts 9 in a plan view corresponds to one side wall 4a of the metal case 4. It is arranged in an inclined state of 45 °. Therefore, the left and right mounting brackets 5 and 5 are positioned in a triangular region 15 formed by one side 9c of the fastening line 9b and the corner 4g of the metal case 4. The fastening bolts 9 are close to the side walls 4 a of the metal case 4, and one fastening bolt 9 is positioned on a straight line connecting the left and right mounting brackets 5, 5.
　そして、前記エアバッグ本体３を収納した前記金属ケース４を、前記マウントブラケット５，５を介して前記リインフォースメント８に取り付け、前記エアバッグカバー２の前記係止孔２ｄに前記金属ケース４の前記係止爪４ｃを係止させるとともに、前記係止爪２ａを前記ダッシュボード１４の開口部１４ａに係止させることにより、前記助手席用エアバッグ１が前記ダッシュボード１４に取り付けられる。 Then, the metal case 4 containing the airbag body 3 is attached to the reinforcement 8 via the mount brackets 5, 5, and the metal case 4 is inserted into the locking hole 2 d of the airbag cover 2. The passenger's seat airbag 1 is attached to the dashboard 14 by locking the locking claw 4 c and locking the locking claw 2 a to the opening 14 a of the dashboard 14.
　本実施例では、インフレータ６を、平面視で、締結ボルト９を結んで形成される略正方形の締結ライン９ｂの一辺９ｃが、金属ケース４の側壁４ａに対して４５°傾斜するように配置し、左，右のマウントブラケット５，５の前記金属ケース４とのスポット溶接部１３を、前記傾斜させた締結ライン９ｂの一辺９ｃと前記金属ケース４の隅部４ｇとで形成される三角形の領域１５内に配設したので、前記各締結ボルト９から前記金属ケース４の各側壁４ａまで、及び前記マウントブラケット５のスポット溶接部１３までの距離が短くなり、それだけインフレータ６と前記金属ケース４との結合剛性を向上できる。また、１つの締結ボルト９については前記左，右のマウントブラケット５，５を結ぶ直線上に位置したので、前記締結ボルト９を結んだ前記締結ライン９ｂを、前記金属ケース４の側壁４ａに対して平行に配置した場合に比較して、前記エアバッグ本体３が車室内方向へ展開したときの荷重に対する剛性を向上できる。 In this embodiment, the inflator 6 is arranged so that one side 9c of a substantially square fastening line 9b formed by connecting the fastening bolts 9 is inclined by 45 ° with respect to the side wall 4a of the metal case 4 in plan view. A triangular region formed by one side 9c of the inclined fastening line 9b and a corner 4g of the metal case 4 with respect to the spot welded portion 13 of the left and right mounting brackets 5 and 5 with the metal case 4 15, the distance from each fastening bolt 9 to each side wall 4 a of the metal case 4 and to the spot welded portion 13 of the mount bracket 5 is shortened, and the inflator 6 and the metal case 4 are reduced accordingly. The joint rigidity can be improved. Since one fastening bolt 9 is positioned on a straight line connecting the left and right mounting brackets 5 and 5, the fastening line 9 b connecting the fastening bolt 9 is connected to the side wall 4 a of the metal case 4. As compared with the case where the airbag body 3 is arranged in parallel, the rigidity against the load when the airbag body 3 is deployed in the vehicle interior direction can be improved.
　また、前記マウントブラケット５を前記三角形の領域１５部分に配置したので、前記金属ケース４を小型化しながら、該金属ケース４の底壁４ｂに前記マウントブラケット５の溶接面を充分に確保でき、前記金属ケース４の軽量化及び小型化を図ることができる。 In addition, since the mount bracket 5 is arranged in the triangular region 15 portion, the metal case 4 can be made small, and a weld surface of the mount bracket 5 can be sufficiently secured on the bottom wall 4b of the metal case 4. The metal case 4 can be reduced in weight and size.
　なお、前記実施例では、４個の締結ボルト９で締結した場合を説明したが、本発明の締結ボルトは４個に限定されない。また、締結ボルト９を結んで形成される締結ライン９ｂが略正方形の場合を説明したが、本発明の締結ラインは矩形であれば良い。また前記締結ラインを、金属ケース４の側壁４ａに対して４５°傾けて配置した場合を説明したが、本発明の傾斜角度は４５°に限定されない。要は、左，右のマウントブラケット５，５の前記金属ケース４との溶接部１３を、前記傾斜している締結ライン９ｂの一辺９ｃと前記金属ケース４の隅部４ｇとで形成される三角形の領域内に配置可能の程度に傾斜させれば良い。 In addition, although the case where it fastened with the four fastening bolts 9 was demonstrated in the said Example, the fastening bolt of this invention is not limited to four pieces. Moreover, although the case where the fastening line 9b formed by connecting the fastening bolt 9 was substantially square was demonstrated, the fastening line of this invention should just be a rectangle. Moreover, although the case where the said fastening line was arrange | positioned 45 degrees with respect to the side wall 4a of the metal case 4 was demonstrated, the inclination angle of this invention is not limited to 45 degrees. In short, the left and right mounting brackets 5, 5 are welded to the metal case 4 with a triangle formed by one side 9 c of the inclined fastening line 9 b and the corner 4 g of the metal case 4. It is sufficient to incline it to such an extent that it can be arranged in the area.
１　助手席用エアバッグ
３　エアバッグ本体
４　金属ケース
４ａ　側壁
４ｇ　金属ケースの隅部
５　マウントブラケット
６　インフレータ
８　リインフォースメント（車体構成部材）
９　ボルト
９ｂ　締結ライン
９ｃ　締結ラインの一辺
１０　ナット
１３　スポット溶接部
１５　三角形の領域 1 Airbag for Passenger Seat 3 Airbag Body 4 Metal Case 4a Side Wall 4g Corner of Metal Case 5 Mount Bracket 6 Inflator 8 Reinforcement (Car Body Components)
9 Bolt 9b Fastening line 9c Side of fastening line 10 Nut 13 Spot weld 15 Triangular area

Claims (1)

  1. 　エアバッグ本体（３）を収納する矩形の金属ケース（４）にインフレータ（６）をボルト（９）及びナット（１０）で締結し、前記金属ケース（４）をマウントブラケット（５）を介して車体構成部材（８）に固定する助手席用エアバッグ（１）のインフレータ取付構造において、
    　前記インフレータ（６）を、前記ボルト（９）を結んで形成される矩形の締結ライン（９ｂ）の一辺（９ｃ）が、前記金属ケース（４）の側壁（４ａ）に対して傾くように配置し、
    　前記マウントブラケット（５）の前記金属ケース（４）との溶接部（１３）を、前記締結ライン（９ｂ）の一辺（９ｃ）と前記金属ケース（４）の隅部（４ｇ）とで形成される三角形の領域（１５）内に設けた
    ことを特徴とする助手席用エアバッグ（１）のインフレータ取付構造。     An inflator (6) is fastened with a bolt (9) and a nut (10) to a rectangular metal case (4) that houses the airbag body (3), and the metal case (4) is connected via a mounting bracket (5). In the inflator mounting structure of the passenger seat airbag (1) fixed to the vehicle body component (8),
    The inflator (6) is arranged such that one side (9c) of a rectangular fastening line (9b) formed by connecting the bolt (9) is inclined with respect to the side wall (4a) of the metal case (4). And
    A welded portion (13) of the mount bracket (5) with the metal case (4) is formed by one side (9c) of the fastening line (9b) and a corner (4g) of the metal case (4). An inflator mounting structure for a passenger airbag (1), characterized in that it is provided in a triangular area (15).
PCT/JP2011/075293 2010-11-30 2011-11-02 Inflator mounting structure for airbag for front passenger seat WO2012073641A1 (en)

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JP2010267026A JP5606296B2 (en) 2010-11-30 2010-11-30 Inflator mounting structure for passenger seat airbag
JP2010-267026 2010-11-30

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DE102017102049A1 (en) * 2017-02-02 2018-08-02 Trw Automotive Gmbh Gas generator holder and gas bag module
KR102200946B1 (en) * 2017-06-14 2021-01-08 (주)엘지하우시스 Airbag module and the manufacturing method thereof

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