JPH0752744A - Gas generator for unfolding air bag - Google Patents
Gas generator for unfolding air bagInfo
- Publication number
- JPH0752744A JPH0752744A JP5206620A JP20662093A JPH0752744A JP H0752744 A JPH0752744 A JP H0752744A JP 5206620 A JP5206620 A JP 5206620A JP 20662093 A JP20662093 A JP 20662093A JP H0752744 A JPH0752744 A JP H0752744A
- Authority
- JP
- Japan
- Prior art keywords
- gas
- housing
- barrier member
- ignition
- cooling
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000004888 barrier function Effects 0.000 claims abstract description 40
- 238000001816 cooling Methods 0.000 claims abstract description 24
- 238000002485 combustion reaction Methods 0.000 claims abstract description 18
- 239000000463 material Substances 0.000 claims description 12
- 238000004519 manufacturing process Methods 0.000 abstract description 11
- 239000007789 gas Substances 0.000 description 147
- 239000003795 chemical substances by application Substances 0.000 description 29
- 230000000052 comparative effect Effects 0.000 description 5
- 230000002093 peripheral effect Effects 0.000 description 5
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 4
- PXIPVTKHYLBLMZ-UHFFFAOYSA-N Sodium azide Chemical compound [Na+].[N-]=[N+]=[N-] PXIPVTKHYLBLMZ-UHFFFAOYSA-N 0.000 description 4
- 238000001914 filtration Methods 0.000 description 4
- 229910052708 sodium Inorganic materials 0.000 description 4
- 239000011734 sodium Substances 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052783 alkali metal Inorganic materials 0.000 description 2
- 150000001340 alkali metals Chemical class 0.000 description 2
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 2
- 150000001342 alkaline earth metals Chemical class 0.000 description 2
- 150000001540 azides Chemical class 0.000 description 2
- 239000000567 combustion gas Substances 0.000 description 2
- 238000005242 forging Methods 0.000 description 2
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- 230000000644 propagated effect Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- XWROSHJVVFETLV-UHFFFAOYSA-N [B+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O Chemical compound [B+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O XWROSHJVVFETLV-UHFFFAOYSA-N 0.000 description 1
- -1 bitetrazole compound Chemical class 0.000 description 1
- 150000001638 boron Chemical class 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 239000002516 radical scavenger Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Landscapes
- Air Bags (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、主に衝突時の安全装
置としての空気袋、救命袋、ゴムボート、脱出シュート
等のエアバッグを膨脹展開させるのに使用されるエアバ
ッグ展開用ガス発生器に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas generator for expanding an air bag, which is mainly used for inflating and expanding an air bag such as an air bag, a life saving bag, a rubber boat, an escape chute, etc. as a safety device at the time of collision. It is about.
【０００２】[0002]
【従来の技術】従来、車両特に乗用車において、衝突時
のショックから乗員を保護するための安全装置として
は、衝突時にエアバッグを瞬時に膨脹させるエアバッグ
装置が知られている。このエアバッグ装置は、エアバッ
グ及びそのエアバッグを膨脹させるためのガスを発生す
るガス発生器から構成されている。また、エアバッグ
は、運転席用の装置では６０〜７０リットルの容積を持
ち、助手席用の装置では１５０〜２５０リットルの容積
を持っている。そして、乗用車の衝突時には、点火機構
の発火によりガス発生剤が燃焼してガスを発生し、その
ガスによりエアバッグが瞬時に膨脹されて、乗員が衝突
時の衝撃から保護される。2. Description of the Related Art Conventionally, as a safety device for protecting an occupant from a shock at the time of a collision in a vehicle, especially a passenger car, an airbag device for instantaneously inflating an airbag at the time of a collision is known. This airbag device is composed of an airbag and a gas generator that generates gas for inflating the airbag. The airbag has a volume of 60 to 70 liters in the driver's seat device and 150 to 250 liters in the passenger's seat device. When a passenger vehicle collides, the gas generating agent burns due to ignition of the ignition mechanism to generate gas, and the gas instantaneously inflates the airbag to protect the occupant from impact at the time of collision.
【０００３】ところで、運転席用のエアバッグ装置に使
用されるガス発生器は、ハンドルの中央部のパッドカバ
ー内に収納する必要があって、大きさや形状に制約を受
けるため、大部分が円盤型の圧力容器形状になってい
る。これに対して、助手席用のエアバッグ装置に使用さ
れるガス発生器は、ガス発生剤を多量に収容するために
容器を大きくする必要があること、及び助手席前部のパ
ネル内への収納組み付け等を考慮して、細長筒型の圧力
容器形状になっている。また、今後自動車への搭載が予
想される後部座席用エアバッグ装置や側面衝突用エアバ
ッグ装置においても、この細長筒型のガス発生器が同様
に使用される。By the way, most of the gas generators used in the airbag apparatus for the driver's seat need to be housed in the pad cover in the central portion of the steering wheel, and are restricted in size and shape. It is shaped like a pressure vessel. On the other hand, in the gas generator used for the airbag device for the passenger seat, it is necessary to make the container large in order to store a large amount of the gas generating agent, and In consideration of storage and assembly, it has an elongated tubular pressure vessel shape. The elongated tubular gas generator is also used in a rear seat airbag device and a side collision airbag device, which are expected to be installed in an automobile in the future.
【０００４】この種の助手席用のエアバッグ装置におけ
るガス発生器としては、例えば特開平１−２９７３３６
号公報に示されるような構成のものが従来から知られて
いる。すなわち、図４に示すように、ハウジング２１は
円筒状に形成され、周壁の一側には複数のガス流出孔２
２が形成されている。円弧状をなす障壁部材２３はハウ
ジング２１内の中心位置にハウジング２１のガス流出孔
２２を覆うように配設され、ガスの流れを規制する。ペ
レット状のガス発生剤２４はこの障壁部材２３内に配置
され、図示しない点火装置の点火により燃焼してガスを
発生する。冷却捕集材２５は障壁部材２３より外周位置
に環状に配置され、ガスを冷却すると同時にガス中の固
体残渣を濾過する。As a gas generator in an airbag device for a passenger seat of this type, for example, Japanese Patent Laid-Open No. 1-297336 is used.
A structure as shown in Japanese Patent Publication has been conventionally known. That is, as shown in FIG. 4, the housing 21 is formed in a cylindrical shape, and the plurality of gas outflow holes 2 are formed on one side of the peripheral wall.
2 is formed. The arcuate barrier member 23 is arranged at the center of the housing 21 so as to cover the gas outflow hole 22 of the housing 21 and regulates the flow of gas. The pellet-shaped gas generating agent 24 is disposed inside the barrier member 23 and burns to generate gas by ignition of an ignition device (not shown). The cooling scavenger 25 is annularly arranged on the outer peripheral position of the barrier member 23 and cools the gas and at the same time filters the solid residue in the gas.
【０００５】そして、ガス発生剤２４の燃焼により発生
したガスは、障壁部材２３により流れる方向が規制さ
れ、図中矢印で示すように、障壁部材２３と反対側へ流
れてハウジング２１の内壁面にあたり、冷却捕集材２５
内を通過して冷却、濾過される。さらに、冷却、濾過さ
れたガスはガス流出孔２２より流出し、図示しないエア
バッグ内に流入してエアバッグを膨張、展開させる。The direction of flow of the gas generated by the combustion of the gas generating agent 24 is regulated by the barrier member 23, and flows toward the opposite side of the barrier member 23 and hits the inner wall surface of the housing 21, as indicated by the arrow in the figure. , Cooling collector 25
It is cooled by passing through the inside and filtered. Further, the cooled and filtered gas flows out from the gas outflow hole 22 and flows into an airbag (not shown) to inflate and deploy the airbag.
【０００６】[0006]
【発明が解決しようとする課題】ところが、この従来の
ガス発生器においては、ガス発生剤２４の燃焼ガスを障
壁部材２３の規制によりハウジング２１のガス流出孔２
２と反対側に流し、ハウジング２１内壁面に衝突させて
冷却捕集材２５内を迂回させる構造となっている。この
ため、ハウジング２１内に障壁部材２３を配置する場
合、その方向を正確に位置決め設定する必要があり、製
造工程が複雑になるという問題があった。However, in this conventional gas generator, the combustion gas of the gas generating agent 24 is regulated by the barrier member 23 so that the gas outflow hole 2 of the housing 21 can be prevented.
It flows to the side opposite to 2, and collides with the inner wall surface of the housing 21 to bypass the inside of the cooling and collecting material 25. Therefore, when disposing the barrier member 23 in the housing 21, it is necessary to accurately position and set the direction of the barrier member 23, which causes a problem that the manufacturing process becomes complicated.
【０００７】また、従来のガス発生器においては、実際
には燃焼ガスが主に障壁部材２３の開口部側に位置する
ガス流出孔２２から流出し、他のガス流出孔２２からは
ほとんど流出しないため、冷却捕集材２５の全体を有効
に利用できず、冷却と濾過の効率が悪いという問題があ
った。Further, in the conventional gas generator, the combustion gas actually flows out mainly through the gas outflow hole 22 located on the opening side of the barrier member 23, and hardly flows out through the other gas outflow holes 22. Therefore, the entire cooling and collecting material 25 cannot be effectively used, and there is a problem that the efficiency of cooling and filtering is poor.
【０００８】さらに、障壁部材２３の開口部とハウジン
グ２１のガス流出孔２２よりガスの吹き出す方向が一方
向のみであるため、それぞれの部材にガスの流れによる
圧力が加わり、ガス発生器の設計に過剰な強度が要求さ
れるという問題があった。Furthermore, since the gas is blown out only in one direction from the opening of the barrier member 23 and the gas outflow hole 22 of the housing 21, pressure is applied to each member due to the flow of gas, so that the gas generator can be designed. There is a problem that excessive strength is required.
【０００９】この発明は、このような従来の技術に存在
する問題点に着目してなされたものである。その目的と
するところは、ハウジング内に障壁部材を組み付ける際
に、組立てが容易で、製造工程を簡易にして製造コスト
の低減を図ることのできるエアバッグ展開用ガス発生器
を提供することにある。また、他の目的とするところ
は、発生したガスの濾過性能を向上し、放出されるガス
を一層清浄なものにすることができるエアバッグ展開用
ガス発生器を提供することにある。The present invention has been made by paying attention to the problems existing in such conventional techniques. It is an object of the present invention to provide an airbag deployment gas generator that is easy to assemble when assembling a barrier member in a housing, can simplify the manufacturing process, and can reduce the manufacturing cost. . Another object of the present invention is to provide a gas generator for expanding an air bag, which can improve the filtering performance of the generated gas and can make the discharged gas cleaner.
【００１０】[0010]
【課題を解決するための手段】上記の目的を達成するた
めに、この発明のエアバッグ展開用ガス発生器では、ガ
ス流出孔を有する筒状のハウジング内に、点火を行う点
火機構、燃焼によってガスを発生するガス発生剤、及び
発生したガスを冷却する冷却捕集材を収容し、ガス発生
剤と冷却捕集材との間にガス流通孔を有する筒状の障壁
部材を配設してなるガス発生器において、前記ハウジン
グのガス流出孔と障壁部材のガス流通孔とを、ハウジン
グの軸線方向に位置をずらせて配置したことを特徴とす
るものである。In order to achieve the above object, in the gas generator for deploying an air bag of the present invention, an ignition mechanism for performing ignition in a tubular housing having a gas outflow hole and a combustion A gas generating agent for generating a gas and a cooling trapping material for cooling the generated gas are accommodated, and a cylindrical barrier member having a gas flow hole is provided between the gas generating agent and the cooling trapping material. In this gas generator, the gas outflow hole of the housing and the gas flow hole of the barrier member are arranged so as to be displaced in the axial direction of the housing.
【００１１】[0011]
【作用】上記のように構成されたガス発生器において、
点火機構が点火されると、ガス発生剤が着火燃焼され
て、ハウジング内でガスが発生する。そのガスは冷却捕
集材により冷却及び濾過されるとともに、障壁部材のガ
ス流通孔及びハウジングのガス流出孔を通して迂回され
ながら流出され、エアバッグを膨脹展開させる。In the gas generator configured as described above,
When the ignition mechanism is ignited, the gas generating agent is ignited and burned to generate gas in the housing. The gas is cooled and filtered by the cooling and trapping material, and is discharged while being bypassed through the gas flow hole of the barrier member and the gas outflow hole of the housing to inflate and deploy the airbag.
【００１２】このように、ハウジングのガス流出孔と障
壁部材のガス流通孔とが、ハウジングの軸線方向に位置
をずらせて配置されているため、ハウジング内に障壁部
材を組み付ける際に、それらのガス流出孔の方向を円周
方向へ相互に位置決めする必要がない。従って、製造工
程を簡単にして安価に製作することができる。As described above, the gas outflow hole of the housing and the gas flow hole of the barrier member are arranged so as to be displaced from each other in the axial direction of the housing. Therefore, when the barrier member is assembled in the housing, those gases are assembled. It is not necessary to orient the outflow holes in the circumferential direction relative to each other. Therefore, the manufacturing process can be simplified and the manufacturing cost can be reduced.
【００１３】また、ハウジングのガス流出孔と障壁部材
のガス流通孔とを、ハウジングの円周方向に位置をずら
せて配置する必要がないため、ハウジングの外周全体に
亘ってガス流出孔を形成することができる。従って、ハ
ウジングのガス流出孔から外周全体のいずれの方向にも
ガスを流出させることができるとともに、冷却捕集材を
有効に利用できてガスをより清浄化することができる。Further, since it is not necessary to dispose the gas outflow hole of the housing and the gas flow hole of the barrier member at different positions in the circumferential direction of the housing, the gas outflow hole is formed over the entire outer circumference of the housing. be able to. Therefore, the gas can be discharged from the gas outflow hole of the housing in any direction of the entire outer periphery, and the cooling trapping material can be effectively used to further purify the gas.
【００１４】[0014]
【実施例】以下、この発明をエアバッグ展開用のガス発
生器に具体化した一実施例を、図１〜図３に基づいて詳
細に説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is embodied in a gas generator for deploying an air bag will be described in detail below with reference to FIGS.
【００１５】図１に示すように、このガス発生器１のハ
ウジング２は一端を開口した有底円筒状に形成され、そ
の開口端部には点火室３が密閉状に嵌着されている。複
数のガス流出孔４はハウジング２の周壁のほぼ全周に亘
って均等に形成され、ハウジング２の周壁内面に貼り付
けられた金属箔５によって塞がれている。As shown in FIG. 1, a housing 2 of the gas generator 1 is formed in a bottomed cylindrical shape with one end open, and an ignition chamber 3 is hermetically fitted to the open end. The plurality of gas outflow holes 4 are evenly formed over substantially the entire circumference of the peripheral wall of the housing 2, and are closed by the metal foil 5 attached to the inner surface of the peripheral wall of the housing 2.
【００１６】点火機構６は前記ハウジング２内の片端部
に配置されるように、点火室３内に設けられている。す
なわち、ボロン硝石等よりなる粉末状の着火剤７はアル
ミニウム等の薄板よりなる着火剤ケース８に密閉封入し
た状態で、点火室３内に収容されている。電気点火具９
は着火剤７内へ突出するように点火室３に嵌入固定さ
れ、その外側にはリード線１０が接続されている。そし
て、この電気点火具９が点火されたとき、着火剤ケース
８が破断されて着火剤７が着火され、その火炎が点火室
３の着火孔１１から放出される。The ignition mechanism 6 is provided in the ignition chamber 3 so as to be arranged at one end of the housing 2. That is, the powdery igniting agent 7 made of boron nitrate or the like is housed in the ignition chamber 3 in a hermetically sealed state in an igniting agent case 8 made of a thin plate of aluminum or the like. Electric igniter 9
Is fixedly fitted into the ignition chamber 3 so as to project into the ignition agent 7, and the lead wire 10 is connected to the outside thereof. Then, when the electric igniter 9 is ignited, the igniting agent case 8 is broken and the igniting agent 7 is ignited, and the flame thereof is discharged from the ignition hole 11 of the ignition chamber 3.
【００１７】図１〜図３に示すように、円筒状の障壁部
材１２は前記ハウジング２内に所定間隔をおいて同心状
に配設され、その周壁には複数のガス流通孔１３がほぼ
全周に亘って均等に形成されている。そして、前記ハウ
ジング２のガス流出孔４と障壁部材１２のガス流通孔１
３とが、互いに合致しないように、ハウジング２の軸線
方向に位置をずらせて配置されている。As shown in FIGS. 1 to 3, the cylindrical barrier member 12 is concentrically arranged in the housing 2 at a predetermined interval, and a plurality of gas circulation holes 13 are formed on the peripheral wall thereof. It is formed uniformly over the circumference. Then, the gas outflow hole 4 of the housing 2 and the gas flow hole 1 of the barrier member 12
3 and 3 are arranged so as to be displaced in the axial direction of the housing 2 so as not to coincide with each other.
【００１８】燃焼室１４は前記障壁部材１２内に設けら
れ、その内部にはペレット状をなす多数のガス発生剤１
５が装填されている。このガス発生剤１５としては、ア
ジ化ナトリウムに代表されるアルカリ金属やアルカリ土
類金属のアジ化物と金属酸化物との組み合わせよりなる
ものや、ビテトラゾール化合物の金属塩と酸化剤との組
み合わせよりなるもの等が使用される。そして、前記着
火剤７が着火されたとき、このガス発生剤１５が燃焼さ
れて窒素ガス等のガスを発生する。The combustion chamber 14 is provided in the barrier member 12, and a large number of pellets of the gas generating agent 1 are provided therein.
5 is loaded. The gas generating agent 15 includes a combination of an azide of an alkali metal or an alkaline earth metal typified by sodium azide and a metal oxide, or a combination of a metal salt of a bitetrazole compound and an oxidizing agent. Are used. When the ignition agent 7 is ignited, the gas generating agent 15 is burned to generate a gas such as nitrogen gas.
【００１９】冷却捕集材１６は前記ハウジング２と障壁
部材１２との間に所定の厚みをもって配置されている。
そして、前記ガス発生剤１５の燃焼によって発生したガ
スが、障壁部材１２のガス流通孔１３からハウジング２
のガス流出孔４に迂回して流れる際に、この冷却捕集材
１６中を通過する。それにより、ガスの冷却が行われる
とともに、そのガス中の固体燃焼残渣が濾過される。The cooling collector 16 is arranged between the housing 2 and the barrier member 12 with a predetermined thickness.
The gas generated by the combustion of the gas generating agent 15 flows from the gas flow holes 13 of the barrier member 12 to the housing 2
When it bypasses the gas outflow hole 4 and flows through the cooling and collecting material 16. Thereby, the gas is cooled and the solid combustion residue in the gas is filtered.
【００２０】さて、前記のように構成されたエアバッグ
展開用のガス発生器において、車両の衝突等に伴い検出
信号が発生すると、リード線１０を介して電気点火具９
に所定の電流が流れて、その点火具９が点火される。こ
の点火による火炎が着火剤ケース８を破って着火剤７に
伝播され、その着火剤７が着火される。そして、この着
火剤７の火炎が着火孔１１から燃焼室１４に伝播され、
ガス発生剤１５が燃焼されてガスを発生する。In the gas generator for deploying an air bag constructed as described above, when a detection signal is generated due to a collision of a vehicle or the like, the electric igniter 9 is led through the lead wire 10.
A predetermined current flows through the igniter 9 to ignite it. The flame due to this ignition breaks the ignition agent case 8 and is propagated to the ignition agent 7, and the ignition agent 7 is ignited. Then, the flame of the ignition agent 7 is propagated from the ignition hole 11 to the combustion chamber 14,
The gas generating agent 15 is burned to generate gas.
【００２１】そして、このガスは図３に矢印で示すよう
に、障壁部材１２のガス流通孔１３からハウジング２の
ガス流出孔４に迂回して流れ、その迂回経路において冷
却捕集材１６中を通過する。これにより、ガスの冷却が
行われるとともに、そのガス中の固体燃焼残渣が濾過さ
れる。その後、浄化されたガスは、ハウジング２のガス
流出孔４を通してハウジング２外に流出され、図示しな
いエアバッグを膨脹させる。As shown by the arrow in FIG. 3, this gas bypasses the gas flow hole 13 of the barrier member 12 to the gas outflow hole 4 of the housing 2, and flows in the cooling trap 16 in the bypass path. pass. As a result, the gas is cooled and the solid combustion residue in the gas is filtered. After that, the purified gas flows out of the housing 2 through the gas outflow hole 4 of the housing 2 to inflate an airbag (not shown).
【００２２】このように、この実施例のガス発生器にお
いては、ハウジング２のガス流出孔４と障壁部材１２の
ガス流通孔１３とが、ハウジング２の軸線方向に位置を
ずらせて配置されている。このため、ハウジング２内に
障壁部材１２を組み付ける際に、ガス流出孔４とガス流
通孔１３の方向をハウジング２の円周方向へ相互に位置
決めする必要がない。従って、製造工程を簡略化するこ
とができて、製作コストを低減することができる。As described above, in the gas generator of this embodiment, the gas outflow hole 4 of the housing 2 and the gas flow hole 13 of the barrier member 12 are arranged so as to be displaced in the axial direction of the housing 2. . Therefore, when the barrier member 12 is assembled in the housing 2, it is not necessary to position the gas outflow hole 4 and the gas flow hole 13 in the circumferential direction of the housing 2 relative to each other. Therefore, the manufacturing process can be simplified and the manufacturing cost can be reduced.
【００２３】また、この実施例のガス発生器において
は、ハウジング２のガス流出孔４と障壁部材１２のガス
流通孔１３とを、ハウジング２の円周方向に位置をずら
せて配置する必要がないため、ハウジング２の外周全体
に亘ってガス流出孔４を形成することができる。従っ
て、ハウジング２のガス流出孔４から外周全体のいずれ
の方向にもガスを流出させることができて、車両などに
対するガス発生器１の装着に制約を受けるおそれを防止
することができる。Further, in the gas generator of this embodiment, it is not necessary to dispose the gas outflow hole 4 of the housing 2 and the gas flow hole 13 of the barrier member 12 in the circumferential direction of the housing 2 so as to be displaced from each other. Therefore, the gas outflow hole 4 can be formed over the entire outer periphery of the housing 2. Therefore, the gas can flow out from the gas outflow hole 4 of the housing 2 in any direction of the entire outer circumference, and it is possible to prevent the installation of the gas generator 1 on a vehicle or the like from being restricted.
【００２４】さらに、この実施例のガス発生器において
は、燃焼室１４内で発生したガスが、障壁部材１２のガ
ス流通孔１３とハウジング２のガス流出孔４との間で迂
回する際に、冷却捕集材１６によってガスの冷却濾過が
行われる。従って、ガスに含まれる固体燃焼残渣を一層
効果的に濾過することができ、ガスをより一層清浄化す
ることができる。Further, in the gas generator of this embodiment, when the gas generated in the combustion chamber 14 bypasses between the gas flow hole 13 of the barrier member 12 and the gas outflow hole 4 of the housing 2, The cooling and collecting material 16 cools and filters the gas. Therefore, the solid combustion residue contained in the gas can be filtered more effectively, and the gas can be further cleaned.
【００２５】加えて、ガスの流れは障壁部材１２やハウ
ジング２の全体にわたり、従来のようにガスの吹き出す
方向が一方向のみではないため、特定の部分にガスの流
れによる圧力が加わることがなく、部材に過剰な強度が
要求されるおそれがなく、ガス発生器の設計が容易であ
る。In addition, the flow of gas is not limited to one direction as in the conventional case, and the pressure due to the flow of gas is not applied to a specific portion throughout the entire barrier member 12 and the housing 2. Therefore, there is no fear that the members will be required to have excessive strength, and the design of the gas generator is easy.
【００２６】ちなみに、この実施例のガス発生器１と、
比較例のガス発生器とについて、発生するガスの圧力及
び燃焼残渣のナトリウム量を測定したところ、次のよう
な結果が得られた。すなわち、この実施例のガス発生器
１においては、ハウジング２をアルミニウムの鍛造によ
り、外径５０ｍｍ、長さ２００ｍｍの有底円筒状に形成
した。また、点火室３を同様にアルミニウムの鍛造によ
り中空円筒状に形成した。さらに、障壁部材１２をスチ
ールの薄板により円筒状に形成し、ハウジング２のガス
流出孔４の中間に位置するようにガス流通孔１３を透設
した。加えて、ハウジング２のガス流出孔４は直径６ｍ
ｍで３２個、障壁部材１２のガス流通孔１３は直径７ｍ
ｍで６４個である。By the way, the gas generator 1 of this embodiment,
When the pressure of the generated gas and the amount of sodium in the combustion residue were measured with the gas generator of the comparative example, the following results were obtained. That is, in the gas generator 1 of this example, the housing 2 was formed by forging aluminum into a bottomed cylindrical shape having an outer diameter of 50 mm and a length of 200 mm. Further, the ignition chamber 3 was similarly formed into a hollow cylindrical shape by forging aluminum. Further, the barrier member 12 was formed into a cylindrical shape with a thin steel plate, and the gas flow hole 13 was provided so as to be positioned in the middle of the gas outflow hole 4 of the housing 2. In addition, the gas outlet hole 4 of the housing 2 has a diameter of 6 m.
32 in m, the gas passage hole 13 of the barrier member 12 has a diameter of 7 m
There are 64 in m.
【００２７】しかも、点火機構６の着火剤７としては、
５．０ｇのボロン硝石を使用した。ガス発生剤１５とし
ては、アジ化ナトリウムに代表されるアルカリ金属やア
ルカリ土類金属のアジ化物と、金属酸化物との組み合わ
せよりなるペレット状のものを、燃焼室１４内に１８０
ｇ装填した。冷却捕集材１６としては、細目の平織り金
網と、細目の畳織り金網と、セラミック繊維紙とらなる
ものを使用した。Moreover, as the ignition agent 7 of the ignition mechanism 6,
5.0 g of boron salt stone was used. As the gas generating agent 15, a pellet-shaped one made of a combination of an azide of an alkali metal or an alkaline earth metal typified by sodium azide and a metal oxide is provided in the combustion chamber 180.
g loaded. As the cooling and collecting material 16, a fine plain weave wire mesh, a fine tatami weave wire mesh, and a ceramic fiber paper were used.
【００２８】一方、比較例のガス発生器では、実施例の
構成から障壁部材１２を取り外したものを使用した。そ
して、この実施例のガス発生器１及び比較例のガス発生
器を、それぞれ６０リットルのタンク試験器に取り付
け、タンク試験器内の圧力と、タンク内部に放出された
燃焼残渣のナトリウム量とを測定した。On the other hand, in the gas generator of the comparative example, one obtained by removing the barrier member 12 from the constitution of the example was used. Then, each of the gas generator 1 of this example and the gas generator of the comparative example was attached to a tank tester of 60 liters, and the pressure in the tank tester and the amount of sodium in the combustion residue discharged into the tank were measured. It was measured.
【００２９】その結果、この実施例のガス発生器１で
は、電気点火具９への通電から３．３ｍｓ後にガス発生
器１からのガスの放出が始まった。また、タンク内圧は
通電から２０ｍｓで１．８ｋｇｆ／ｃｍ2 に、通電から
６０ｍｓ後に最大圧力の５．５ｋｇｆ／ｃｍ2 になっ
た。さらに、タンク内部に放出された燃焼残渣のナトリ
ウム量は１３０ｍｇになった。As a result, in the gas generator 1 of this embodiment, the discharge of gas from the gas generator 1 started 3.3 ms after the electricity was supplied to the electric igniter 9. Further, the tank internal pressure became 1.8 kgf / cm 2 20 ms after the energization, and reached the maximum pressure of 5.5 kgf / cm 2 60 ms after the energization. Further, the amount of sodium in the combustion residue released inside the tank was 130 mg.
【００３０】それに対して、比較例のガス発生器では、
実施例と同等のガス圧を測定できたが、燃焼残渣のナト
リウム量は１４２０ｍｇになった。この試験結果から明
らかなように、障壁部材１２を備えた実施例のガス発生
器１によれば、障壁部材を備えない比較例のガス発生器
に比較して、ガス中の燃焼残渣の濾過効率を大幅にアッ
プできることが分かった。On the other hand, in the gas generator of the comparative example,
Although the gas pressure equivalent to that in the example could be measured, the amount of sodium in the combustion residue was 1420 mg. As is clear from the test results, according to the gas generator 1 of the example provided with the barrier member 12, the filtration efficiency of the combustion residue in the gas is higher than that of the gas generator of the comparative example not provided with the barrier member. It turns out that can be greatly improved.
【００３１】なお、この発明は前記実施例の構成に限定
されるものではなく、この発明の趣旨から逸脱しない範
囲で、次のように任意に変更して具体化することも可能
である。 （１）ガス流出孔４とガス流通孔１３の直径を変えた
り、それぞれの数を適宜調整すること。 （２）前記実施例の点火室３に代えて、ハウジング２内
の軸心位置に孔の開いた金属製の円筒よりなる着火剤チ
ューブを配設し、その着火剤チューブ内に着火剤７や電
気点火具９等よりなる点火機構６を設けること。 （３）ガス発生剤１５としてディスク状や棒状のものを
使用すること。 （４）ハウジング２を楕円筒状や角筒状に形成するこ
と。The present invention is not limited to the configuration of the above-described embodiment, and may be embodied by making the following arbitrary changes without departing from the spirit of the present invention. (1) The diameters of the gas outflow holes 4 and the gas flow holes 13 are changed, and the numbers thereof are appropriately adjusted. (2) Instead of the ignition chamber 3 of the above-described embodiment, an ignition tube made of a metal cylinder having a hole is arranged at the axial center position in the housing 2, and the ignition agent 7 and Provide an ignition mechanism 6 including an electric igniter 9. (3) Use a disk-shaped or rod-shaped gas generating agent 15. (4) To form the housing 2 into an elliptic cylinder or a rectangular cylinder.
【００３２】[0032]
【発明の効果】この発明のエアバッグ展開用ガス発生器
は、以上説明したように構成されているため、次のよう
な優れた効果を奏する。The gas generator for deploying an air bag of the present invention is constructed as described above, and therefore exhibits the following excellent effects.
【００３３】この発明によれば、ハウジング内に障壁部
材を組み付ける際に、ガス流出孔とガス流通孔の方向を
相互に位置決めする必要がなく、組立てが容易で、製造
工程を簡易にして製造コストの低減を図ることができ
る。また、ハウジングの外周全体に亘ってガス流出孔を
形成することができて、そのガス流出孔からいずれの方
向にもガスを流出可能で、冷却捕集材を有効利用でき
て、発生したガスの濾過性能を向上し、放出されるガス
を一層清浄なものにすることができる。According to the present invention, when assembling the barrier member in the housing, it is not necessary to position the gas outflow hole and the gas flow hole in the direction of each other, the assembly is easy, the manufacturing process is simplified, and the manufacturing cost is reduced. Can be reduced. Further, a gas outflow hole can be formed over the entire outer periphery of the housing, the gas can flow out in any direction from the gas outflow hole, the cooling trap can be effectively used, and the generated gas The filtration performance can be improved and the gas released can be made cleaner.
【図１】この発明を具体化したガス発生器の一実施例を
示す断面図である。FIG. 1 is a sectional view showing an embodiment of a gas generator embodying the present invention.
【図２】図１のＡ−Ａ線における部分断面図である。FIG. 2 is a partial cross-sectional view taken along the line AA of FIG.
【図３】ガスの流れを説明するために、図１の一部を示
す部分断面図である。FIG. 3 is a partial cross-sectional view showing a part of FIG. 1 for explaining a gas flow.
【図４】従来のガス発生器を示す断面図である。FIG. 4 is a sectional view showing a conventional gas generator.
１…ガス発生器、２…ハウジング、４…ガス流出孔、６
…点火機構、７…着火剤、９…電気点火具、１２…障壁
部材、１３…ガス流通孔、１５…ガス発生剤、１６…冷
却捕集材。1 ... Gas generator, 2 ... Housing, 4 ... Gas outflow hole, 6
... Ignition mechanism, 7 ... Ignition agent, 9 ... Electric igniter, 12 ... Barrier member, 13 ... Gas flow hole, 15 ... Gas generating agent, 16 ... Cooling trapping material.
Claims (1)
に、点火を行う点火機構、燃焼によってガスを発生する
ガス発生剤、及び発生したガスを冷却する冷却捕集材を
収容し、ガス発生剤と冷却捕集材との間にガス流通孔を
有する筒状の障壁部材を配設してなるエアバッグ展開用
ガス発生器において、 前記ハウジングのガス流出孔と障壁部材のガス流通孔と
を、ハウジングの軸線方向に位置をずらせて配置したこ
とことを特徴とするエアバッグ展開用ガス発生器。1. A gas generating apparatus, which comprises a tubular housing having gas outlet holes, an ignition mechanism for performing ignition, a gas generating agent for generating gas by combustion, and a cooling trapping material for cooling the generated gas. In a gas generator for deploying an air bag in which a tubular barrier member having a gas flow hole is disposed between the agent and the cooling and collecting material, the gas outflow hole of the housing and the gas flow hole of the barrier member are provided. , A gas generator for deploying an airbag, wherein the gas generator is arranged so as to be displaced in the axial direction of the housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5206620A JPH0752744A (en) | 1993-08-20 | 1993-08-20 | Gas generator for unfolding air bag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5206620A JPH0752744A (en) | 1993-08-20 | 1993-08-20 | Gas generator for unfolding air bag |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0752744A true JPH0752744A (en) | 1995-02-28 |
Family
ID=16526396
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5206620A Pending JPH0752744A (en) | 1993-08-20 | 1993-08-20 | Gas generator for unfolding air bag |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0752744A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002024493A1 (en) * | 2000-09-19 | 2002-03-28 | Nippon Kayaku Kabushiki-Kaisha | Gas generator |
| KR101413870B1 (en) * | 2006-02-13 | 2014-06-30 | 이턴 코포레이션 | Double shut-off fuel supply valve |
-
1993
- 1993-08-20 JP JP5206620A patent/JPH0752744A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002024493A1 (en) * | 2000-09-19 | 2002-03-28 | Nippon Kayaku Kabushiki-Kaisha | Gas generator |
| KR101413870B1 (en) * | 2006-02-13 | 2014-06-30 | 이턴 코포레이션 | Double shut-off fuel supply valve |
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