JPH069950B2 - Pad for gas bag - Google Patents
Pad for gas bagInfo
- Publication number
- JPH069950B2 JPH069950B2 JP62014935A JP1493587A JPH069950B2 JP H069950 B2 JPH069950 B2 JP H069950B2 JP 62014935 A JP62014935 A JP 62014935A JP 1493587 A JP1493587 A JP 1493587A JP H069950 B2 JPH069950 B2 JP H069950B2
- Authority
- JP
- Japan
- Prior art keywords
- pad
- thin portion
- gas bag
- thin
- mold
- 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.)
- Expired - Lifetime
Links
Description
【発明の詳細な説明】 ＜産業上の利用分野＞ この発明は、自動車等の乗員の保護のために所定時膨張
するガスバツグを平常時被覆収納しているガスバツグ用
パツドに関する。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pad for a gas bag that normally covers and stores a gas bag that expands at a predetermined time for protecting an occupant of an automobile or the like.
＜従来の技術＞ 従来のガスバツグ用パツド（以下パツドと略す）は、ガ
スバツグが膨張する際、その圧力で破断し得るようウレ
タン等の軟質合成樹脂から形成されるとともに、所定部
位で破断し得るよう破断用の薄肉部を備えていた（特開
昭５０−１２７３３６号公報、特開昭５５−１１０６４
３号公報参照）。<Prior Art> A conventional gas bag pad (hereinafter referred to as a pad) is made of a soft synthetic resin such as urethane so that it can be broken by the pressure when the gas bag is expanded, and it is also possible to break it at a predetermined portion. It had a thin portion for breaking (Japanese Patent Laid-Open No. 50-127336 and Japanese Patent Laid-Open No. 55-11064).
(See Japanese Patent Publication No. 3).
そして、その薄肉部の厚さは一般に１．０〜０．５mmで
一定であつた。The thickness of the thin portion was generally 1.0 to 0.5 mm and was constant.
＜発明が解決しようとする問題点＞ 従来のこの種のパツドでは、ガスバツグ膨張時に所定部
位の薄肉部で破断する必要があることから、この薄肉部
は肉厚をさらに薄くすることが望ましい。<Problems to be Solved by the Invention> In a conventional pad of this type, it is necessary to break at a thin portion at a predetermined portion when the gas bag is inflated, and therefore it is desirable to further reduce the thickness of the thin portion.
しかし、従来の薄肉部をさらに薄くすると、ガスバツグ
膨張時以外の、例えば、パツドが手等で押圧される際等
に破断してしまう場合が生じ、パツドの耐久性を低下さ
せてしまう。また、薄肉部をさらに薄くしたパツドを成
形する場合には、その薄肉部での材料流れが悪化するこ
とから、不良品が生じ易くなつてしまう。However, if the conventional thin portion is further thinned, it may break when the pad is pressed by a hand or the like, other than when the gas bag is expanded, and the durability of the pad is deteriorated. In addition, when a pad with a thinner portion is formed, the material flow in the thinner portion deteriorates, and defective products are likely to occur.
また、従来のこの種のパツドでは、薄肉部以外の一般部
の厚さは４．０〜７．０mm程度であり、薄肉部の幅をあ
まり狭くすると、やはりその薄肉部で材料流れが悪くな
り、成形不良を発生することとなるため、薄肉部の幅を
あまり狭くすることができず、薄肉部の幅を少なくとも
２mm程度必要としていた。Moreover, in the conventional pad of this type, the thickness of the general portion other than the thin portion is about 4.0 to 7.0 mm, and if the width of the thin portion is too narrow, the material flow also deteriorates in the thin portion. However, since the molding failure occurs, the width of the thin wall portion cannot be reduced so much that the width of the thin wall portion needs to be at least about 2 mm.
そのため、ガスバツグ膨張時にガスバツグがパツド薄肉
部を破断する際、第１１図に示すよう、その破断線Ｌは
薄肉部の２mm程度の幅内で不規則に蛇行することとな
り、その破断線はパツド毎に相違することとなつて、ガ
スバツグ膨張時におけるガスバツグがパツド薄肉部を破
断させてパツド外方で大きく膨らむ際のガスバツグの展
開荷重が、パツド毎にバラツク虞れが考えられる。Therefore, when the gas bag ruptures the thin pad portion during expansion of the gas bag, the rupture lines L meander randomly within a width of about 2 mm of the thin wall portion, as shown in FIG. The difference is that the deployment load of the gas bag when the gas bag ruptures the thin portion of the pad and greatly expands outside the pad during expansion of the gas bag may vary from pad to pad.
この発明は、上述の問題を解説するもので、耐久性低下
や不良品の発生の増加を招くことなく、ガスバツグ膨張
時に確実に薄肉部内で破断でき、かつその破断線が蛇行
することを規制できてパツド毎にガスバツグ展開荷重の
バラツキを極力少なくすることができるパツドを提供す
ることを目的とする。This invention is to explain the above-mentioned problem, and without causing deterioration of durability and increase of defective products, it is possible to reliably break in the thin portion at the time of gas bag expansion, and it is possible to regulate that the breaking line meanders. It is an object of the present invention to provide a pad capable of minimizing the variation in the gas bag deployment load for each pad.
＜問題点を解決するための手段＞ この発明に係るパッドでは、ガスバツグ膨張時に所定部
位で破断できるよう予め破断用の薄肉部が形成され、軟
質合成樹脂からなるガスバツグ用パツドであつて、記薄
肉部内に、薄肉部の形成方向に沿つて断続的にかつ薄肉
部の幅より幅狭に形成した凹部によつて、第２薄肉部を
形成することにより、既述の問題を解決するものであ
る。<Means for Solving Problems> In the pad according to the present invention, a thin portion for breaking is formed in advance so that it can be broken at a predetermined portion when the gas bag is inflated, and the pad for the gas bag is made of a soft synthetic resin. The above-mentioned problem is solved by forming the second thin portion by a recess formed in the portion intermittently along the forming direction of the thin portion and narrower than the width of the thin portion. .
＜発明の作用・効果＞ この発明に係るパツドでは、第２の薄肉部が、薄肉部内
におけるこの第２薄肉部以外の一般薄肉部より薄く、か
つ、薄肉部以外の一般部よりはるかに薄いことから、ガ
スバツグ膨張時、薄肉部内における第２薄肉部を結ぶよ
うに破断線が走つて破断される。<Operation and Effect of the Invention> In the pad according to the present invention, the second thin-walled portion is thinner than the general thin-walled portion other than the second thin-walled portion in the thin-walled portion, and much thinner than the general thin-walled portion other than the thin-walled portion. Therefore, when the gas bag expands, a break line runs and breaks so as to connect the second thin portion in the thin portion.
そのため、ガスバツグ膨張時、確実に薄肉部内で破断さ
れ、しかも、その破断線は薄肉部内で蛇行が規制される
よう、薄肉部の幅より幅狭の凹部によつて構成された第
２薄肉部を結んで形成されることから、パツド毎に略一
致することとなり、パツド毎のガスバツグ展開荷重のバ
ラツキを極力少なくすることができる。Therefore, when the gas bag expands, the second thin-walled portion formed by the concave portion narrower than the width of the thin-walled portion is surely broken in the thin-walled portion, and the breaking line is regulated to meander in the thin-walled portion. Since they are formed by being tied together, they are substantially the same for each pad, and the variation in the gas bag deployment load for each pad can be minimized.
また、第２薄肉部が薄肉部内で断続的に形成されてお
り、薄肉部内では、その形成方向に沿つてさらに薄い部
位が連続して形成される訳ではなく、第２薄肉部以外の
一般薄肉部が断続的に残つていることから、この一般薄
肉部によつて、ガスバツグ膨張時以外のパツド薄肉部の
破断を防止することができるとともに、成形時における
材料流れの悪化を防止でき、不良品発生の増加を招くこ
とはない。Further, the second thin portion is intermittently formed in the thin portion, and in the thin portion, a thinner portion is not continuously formed along the forming direction thereof, and a general thin portion other than the second thin portion is not formed. Since the part remains intermittently, this general thin part can prevent the thin part of the pad from breaking except when the gas bag is expanded, and can prevent the deterioration of the material flow at the time of molding, and thus the defective product. It does not increase the occurrence.
したがつて、この発明に係るパツドでは、耐久性低下や
不良品発生の増加を招くことなく、ガスバツグ膨張時、
確実に薄肉部内で破断でき、かつその破断線が蛇行する
ことを規制できることから、パツド毎のガスバツグ展開
荷重のバラツキを極力少なくすることができる。Therefore, in the pad according to the present invention, when the gas bag is expanded without inviting a decrease in durability or an increase in defective products,
Since it is possible to reliably break in the thin portion and to prevent the breaking line from meandering, it is possible to minimize the variation in the gas bag deployment load for each pad.
＜実施例＞ 以下、この発明の一実施例を図面に基づいて説明する。<Embodiment> An embodiment of the present invention will be described below with reference to the drawings.
実施例のパツド１１は、第３・４図に示すように、ステ
アリングホイールのボス部Ｂ上部に配置されて、上方か
ら見て略長方形状の上壁１１Ａと上壁１１Ａ周縁から下
方へ延びる４つの側壁１１Ｂ・１１Ｃ・１１Ｄ・１１Ｅ
とを備える略箱形状とし、ガスバツグ１６膨張時に容易
に破断されるようウレタン等の軟質合成樹脂で射出成形
により形成されている。As shown in FIGS. 3 and 4, the pad 11 of the embodiment is arranged above the boss portion B of the steering wheel and extends downward from the upper wall 11A and the peripheral edge of the upper wall 11A which are substantially rectangular when viewed from above. Side walls 11B, 11C, 11D, 11E
And is formed by injection molding of a soft synthetic resin such as urethane so as to be easily broken when the gas bag 16 expands.
なお、このガスバツグ１６は、所定時インフレーター１
３から発生するガスによつて膨張されるもので、下端に
環状の留め金具１６ａが配置され、留め金具１６ａがイ
ンフレーター１３のフランジ部１３ａとともにパツド１
１を係止するバツクアツププレート１４に対して図示し
ないリベツトやボルト等を介して固定されている。It should be noted that this gas bag 16 is provided at a predetermined time with the inflator 1
3, which is inflated by the gas generated from No. 3, and has an annular fastening member 16a arranged at the lower end, and the fastening member 16a together with the flange portion 13a of the inflator 13
It is fixed to the back-up plate 14 which locks 1 through rivets or bolts (not shown).
パツド１１の各側壁１１Ｂ〜１１Ｅには、内周面の下端
付近全周に断面半円弧状の環状溝１１ａが形成されると
ともに、上壁１１Ａ長辺側の側壁１１Ｂ・１１Ｃ下端面
に上下方向の挿入溝１１ｂが形成されている。環状溝１
１ａは、パツド１１を係止するためのバツクアツププレ
ート１４のフランジ部１４ａが嵌入され、挿入溝１１ｂ
は、インフレーター１３のフランジ部１３ａとともにバ
ツクアツププレート１４に固定されるホルダ１５の上方
突出部１５ａが挿入されるものである。Each side wall 11B to 11E of the pad 11 is formed with an annular groove 11a having a semi-circular cross section around the lower end of the inner peripheral surface thereof, and the upper and lower sides of the side walls 11B and 11C on the long side of the upper wall 11A are vertically aligned. Insertion groove 11b is formed. Annular groove 1
1a is fitted with a flange portion 14a of a back up plate 14 for locking the pad 11, and an insertion groove 11b.
The upper projection 15a of the holder 15 fixed to the back-up plate 14 is inserted together with the flange 13a of the inflator 13.
なお、このバツクアツププレート１４は、ガスバツグ１
６膨張時、その圧力を上方へ作用させるものであり、上
方を開口させ底壁１４Ａ中央にインフレーター１３を突
出させる挿通孔１４ｂを備える略箱形状とし、第４図に
おける紙面を貫く側方においてホーンスイツチ機構を介
してステアリングホイールの芯金に連結され、パツド１
１やインフレーター１３・ガスバツグ１６等をボス部Ｂ
上部に配置させている。また、ホルダ１５は、パツド１
１におけるガスバツグ１６に近い上壁１１Ａ長辺側の側
壁１１Ｂ・１１Ｃがガスバツグ１６膨張時に大きな圧力
を受けることとなり、バツクアツププレート１４からこ
れらの側壁１１Ｂ・１１Ｃが外れないよう、側壁１１Ｂ
・１１Ｃ下端付近をバツクアツププレート１４とで挾持
するよう作用したものである。The backup cup plate 14 is used for the gas bag 1
6 When expanding, the pressure is exerted upward, and it has a substantially box shape having an insertion hole 14b that opens upward and projects the inflator 13 in the center of the bottom wall 14A. The pad 1 is connected to the core metal of the steering wheel via a switch mechanism.
1 and inflator 13, gas bag 16 etc. to boss B
It is placed at the top. Also, the holder 15 is a pad 1
1, the side walls 11B and 11C on the long side of the upper wall 11A near the gas bag 16 receive a large pressure when the gas bag 16 expands, so that the side walls 11B and 11C are not separated from the back-up plate 14.
The back cover plate 14 acts so as to hold the vicinity of the lower end of 11C.
そして、このパツド１１の上壁１１Ａには、ガスバツグ
１６膨張時に破断されてその破断された開口からガスバ
ツグ１６がパツド１１上方で大きく膨らむことができる
よう、上方から見て略Ｈ字形状の薄肉部２１が形成され
ている。The upper wall 11A of the pad 11 is broken at the time of expansion of the gas bag 16 so that the gas bag 16 can greatly expand above the pad 11 from the broken opening so that the gas bag 16 has a substantially H-shaped thin portion when viewed from above. 21 is formed.
この薄肉部２１は、第１・２図に示すように、パツド上
壁１１Ａの表面側Ｘと裏面側Ｙとが共に窪んで形成され
るもので、厚さＴを０．８〜１．５mm程度の範囲内で一
定寸法とし、また、幅Ｗを２．０〜５．０mm程度の範囲
内で一定寸法としている。なお、薄肉部２１以外の一般
部２０の厚さＨは、ぴ４．０〜７．０mmとしている。As shown in FIGS. 1 and 2, the thin portion 21 is formed by recessing both the front surface side X and the back surface side Y of the pad upper wall 11A, and has a thickness T of 0.8 to 1.5 mm. The width W is fixed within a range of 2.0 to 5.0 mm. The thickness H of the general portion 20 other than the thin portion 21 is set to 4.0 to 7.0 mm.
また、この薄肉部２１は、薄肉部２１の形成方向に沿つ
て上壁１１Ａ裏面側Ｙに断続的、かつ、薄肉部２１の幅
より幅狭に形成される凹部２４により、薄肉部２１より
さらに薄くなる第２薄肉部２２と、一般薄肉部２３とか
ら構成されている。Further, the thin portion 21 is further formed than the thin portion 21 by the recess 24 formed intermittently along the forming direction of the thin portion 21 on the back surface Y of the upper wall 11A and narrower than the width of the thin portion 21. It is composed of a second thin portion 22 that becomes thinner and a general thin portion 23.
凹部２４は、その深さｄを第２薄肉部２２の厚さｔが薄
肉部２１の厚さＴの約６〜４割となるように薄肉部２１
の厚さＴの約４〜６割の０．３〜０．９mmとし、幅ｗを
薄肉部２１の幅Ｗの約３〜４割の０．６〜２．０mmと
し、また、長さｌを３．０〜６．０mmとして、第２薄肉
部２２と一般薄肉部２３とが略同じ長さで形成されるよ
う構成されている。なお、凹部２４において、あまりそ
の深さｄを大きくして幅ｗを狭くすると、この部位を成
形する金型の耐久性が低下することとなり、また、あま
りその深さｄを小さくして幅ｗを広くすると、ガスバツ
グ１６膨張時における薄肉部２１破断時にその破断線の
蛇行が大きくなることが考えられ、共に望ましくない。The recess 24 has a depth d such that the thickness t of the second thin portion 22 is about 60 to 40% of the thickness T of the thin portion 21.
Of the thickness T of about 40 to 60% of 0.3 to 0.9 mm, the width w of about 30 to 40% of the width W of the thin portion 21 to 0.6 to 2.0 mm, and the length l. Is 3.0 to 6.0 mm, and the second thin portion 22 and the general thin portion 23 are formed to have substantially the same length. If the depth d of the recess 24 is too large and the width w is too narrow, the durability of the mold for molding this portion is reduced, and the depth d is too small to reduce the width w. If the width is wide, it is considered that the meandering of the breaking line becomes large when the thin portion 21 breaks when the gas bag 16 expands, and both are not desirable.
さらに、このパツド１１の内部には、ガスバツグ１６膨
張時に、薄肉部２１以外で破断せず、また、薄肉部２１
以外の部位が飛散しないように、薄肉部２１下方を除い
てポリアミド等の合成繊維で織られた１枚のネツト１２
が埋設されている。このネツト１２におけるパツド環状
溝１１ａ上方部位には、ガスバツグ１６膨張時のパツド
側壁１１Ｂ〜１１Ｅの拡開防止用に、アラミツド繊維か
らなる補強バンド１２ａが縫着されている。Further, inside the pad 11, when the gas bag 16 expands, it does not break except for the thin portion 21, and the thin portion 21
A net 12 woven of synthetic fibers such as polyamide except for the lower part of the thin portion 21 so as to prevent the other parts from scattering.
Is buried. A reinforcing band 12a made of aramid fiber is sewn on the upper portion of the pad annular groove 11a of the net 12 to prevent the pad side walls 11B to 11E from expanding when the gas bag 16 is expanded.
ちなみに、このパツド１１の成形について説明すると、
成形に使用する金型１は、第５〜７図に示すように、型
締め時にパツド１１を成形できる所定のキヤビテイ１ａ
が形成されるよう、各々所定のキヤビテイ用型面２ａ・
３ａ・４ａを備えた固定型２・可動型３及び中子４から
構成されている。By the way, to explain the molding of the pad 11,
As shown in FIGS. 5 to 7, the mold 1 used for molding has a predetermined cavity 1a capable of molding the pad 11 when the mold is clamped.
So that each of the predetermined mold surfaces 2a
It is composed of a fixed die 2 having 3a and 4a, a movable die 3 and a core 4.
この中子４は、固定型２を挿通している突き出しピン５
に保持されるとともに、型開時に第７図に示すように固
定型２から突出してパツド１１を離型させ易く構成され
ている。The core 4 is a protrusion pin 5 that is inserted through the fixed mold 2.
The pad 11 is configured to easily be released from the fixed mold 2 when the mold is opened, as shown in FIG.
なお、２ｂは中子４の位置決め凹部４ｂに対応する位置
決め凸部，２ｃはパツド１１の挿入溝１１ｂを形成する
突片，４ｃはパツド１１の環状溝１１ａを形成する突起
部，６は先端頭部をネツト１２の網目に嵌入させてネツ
ト１２を保持するセツトピン，７は同じくネツト１２の
網目に挿入させてネツト１２を保持するピンである。Reference numeral 2b is a positioning projection corresponding to the positioning recess 4b of the core 4, 2c is a protrusion forming the insertion groove 11b of the pad 11, 4c is a projection forming the annular groove 11a of the pad 11, and 6 is the tip end. A set pin for inserting the portion into the mesh of the net 12 to hold the net 12 is a pin for inserting the portion into the net of the net 12 to hold the net 12.
さらに、可動型３のキヤビテイ用型面３ａには、パツド
上壁１１Ａの薄肉部２１の表面側Ｘを形成できるよう、
凸条３ｂが形成され、同様に中子４のキヤビテイ用型面
４ａには、薄肉部２１の裏面側Ｙを形成できるよう、凹
部２４に対応した第２凸部４ｅを備えた凸条４ｄが形成
されている（第２・５図参照）。Further, on the cavity die surface 3a of the movable die 3, the surface side X of the thin portion 21 of the pad upper wall 11A can be formed.
The ridge 3b is formed, and similarly, the cavity mold surface 4a of the core 4 is provided with the ridge 4d having the second protrusion 4e corresponding to the recess 24 so that the back surface side Y of the thin portion 21 can be formed. It has been formed (see Figures 2.5).
上述の金型１を使用してパツド１１を成形する工程を説
明すると、ネツト１２を中子４にセツトし（第５図参
照）、型閉じさせてキヤビテイ１ａ内に成形材料をゲー
ト１ｂを介して注入して成形し（第６図参照）、その後
型開きさせて離型させ、所定のバリ取りを行なえば、所
定のパツド１１を得ることができる。Explaining the step of molding the pad 11 using the mold 1 described above, the net 12 is set on the core 4 (see FIG. 5), the mold is closed, and the molding material is placed in the cavity 1a via the gate 1b. By injecting and molding (see FIG. 6), then opening the mold and releasing the mold, and performing a predetermined deburring, a predetermined pad 11 can be obtained.
そして、このパツド１１をバツクアツププレート１４及
びホルダ１５を介してボス部Ｂ上部所定位置に取付けた
後、ガスバツグ１６が膨張する際には、薄肉部２１内の
第２薄肉部２２が一般薄肉部２３より薄くかつ一般部２
０よりはるかに薄いことから、薄肉部２１内の第２薄肉
部２２を結ぶように破断線が走つて破断される。After the pad 11 is attached to the upper position of the boss B through the backup cup plate 14 and the holder 15, when the gas bag 16 expands, the second thin portion 22 in the thin portion 21 is replaced by the general thin portion. Thinner than 23 and general part 2
Since it is much thinner than 0, the fracture line runs and is fractured so as to connect the second thin portion 22 in the thin portion 21.
そのため、ガスバツグ１６膨張時、確実に薄肉部２１内
で破断され、しかも、その破断線Ｌは第１０図に示すよ
う薄肉部２１内で蛇行が規制されて第２薄肉部２２を結
んで形成されることから、パツド毎に略一致することと
なつて、パツド１１毎のガスバツグ展開荷重のバラツキ
を略無くすことができる。Therefore, when the gas bag 16 expands, it is surely broken in the thin portion 21, and the breaking line L is formed by connecting the second thin portion 22 by controlling the meandering in the thin portion 21 as shown in FIG. Therefore, it is possible to substantially match each pad, and it is possible to substantially eliminate the variation in the gas bag deployment load for each pad 11.
また、このパツド１１では、第２薄肉部２２が薄肉部２
１内で断続的に形成されており、薄肉部２１内でその形
成方向に沿つてさらに薄い部位が連続して形成される訳
ではなく、一般薄肉部２３が断続的に残つていることか
ら、薄肉部２１の破断強度を著しく低下させることはな
く、ガスバツグ１６膨張時以外のホーン作動時のパツド
１１押圧時等に薄肉部２１が破断することを防止でき
る。Further, in the pad 11, the second thin portion 22 has the thin portion 2
1 is formed intermittently, and a thinner portion is not continuously formed along the forming direction in the thin portion 21, and since the general thin portion 23 remains intermittently, The breaking strength of the thin portion 21 is not significantly reduced, and the thin portion 21 can be prevented from breaking when the pad 11 is pressed when the horn is operating other than when the gas bag 16 is expanded.
さらにまた、薄肉部２１内に一般薄肉部２３が断続的に
形成されていることから、パツド１１成形時、この一般
薄肉部２３を介して成形材料が第２薄肉部２２に容易に
流入し、材料流れの悪化による不良品発生を防止するこ
とができる。Furthermore, since the general thin portion 23 is intermittently formed in the thin portion 21, the molding material easily flows into the second thin portion 22 through the general thin portion 23 when the pad 11 is formed, It is possible to prevent defective products due to deterioration of material flow.
ちなみに、一般薄肉部２３は、薄肉部２１内に断続的に
第２薄肉部２２が形成されて薄肉部２１内での破断を容
易にさせていることから、従来の薄肉部より若干厚くし
てもよく、若干厚くすれば、成形時における材料流れ悪
化による不良品発生を一層防止することができる。By the way, since the general thin portion 23 has the second thin portion 22 intermittently formed in the thin portion 21 to facilitate breakage in the thin portion 21, it is made slightly thicker than the conventional thin portion. Alternatively, if the thickness is made slightly thick, it is possible to further prevent the occurrence of defective products due to deterioration of material flow during molding.
なお、実施例のパツド１１では、その薄肉部２１が上壁
１１Ａの表面側Ｘと裏面側Ｙとを窪ませて裏面側Ｙに凹
部２４を形成したものを示したが、第８図に示すよう
に、例えば上壁１１Ａの裏面側Ｙの一方から窪ませて薄
肉部３１を形成してもよく、また、第９図に示すように
表面側Ｘに凹部４４を形成して薄肉部４１を構成しても
よい。In the pad 11 of the embodiment, the thin-walled portion 21 is formed by denting the front surface side X and the back surface side Y of the upper wall 11A to form the recessed portion 24 on the back surface side Y, as shown in FIG. Thus, for example, the thin portion 31 may be formed by denting from one of the rear surface sides Y of the upper wall 11A, or the recess portion 44 may be formed on the front surface side X to form the thin portion 41 as shown in FIG. You may comprise.
第１図はこの発明の一実施例におけるパツドを示す断面
図であり第３図のＩ−Ｉ断面図，第２図は同実施例のパ
ツドの成形時における型開時の状態を示す部分拡大断面
図，第３図は同実施例のパツドの斜視図，第４図は同実
施例のパツドの使用態様断面図，第５図・第６図・第７
図は各々同実施例のパツドの成形時を順に示す金型の断
面図，第８図・第９図は各々薄肉部の他の形状を示す断
面図，第１０図は同実施例のパツドの破断を示す平面
図，第１１図は従来のパツドの破断を示す平面図であ
る。 １１…パツド、 ２１・３１・４１…薄肉部、 ２２・４４…第２薄肉部。FIG. 1 is a sectional view showing a pad according to an embodiment of the present invention. FIG. 3 is a sectional view taken along the line II of FIG. 3, and FIG. 2 is a partial enlarged view showing a state when the mold is opened at the time of molding the pad of the embodiment. Sectional view, FIG. 3 is a perspective view of the pad of the same embodiment, and FIG. 4 is a sectional view of the pad of the same embodiment in use, FIG. 5, FIG. 6, FIG.
The drawings are sectional views of a mold showing the steps of forming the pad of the same embodiment in order, FIGS. 8 and 9 are sectional views showing other shapes of the thin portion, and FIG. 10 is a drawing of the pad of the same embodiment. FIG. 11 is a plan view showing breakage, and FIG. 11 is a plan view showing breakage of a conventional pad. 11 ... Pad, 21.31.41 ... Thin-walled part, 22.44 ... Second thin-walled part.
Claims (1)
よう予め破断用の薄肉部が形成され、軟質合成樹脂から
なるガスバツグ用パツドであつて、 前記薄肉部内に、薄肉部の形成方向に沿つて断続的にか
つ薄肉部の幅より幅狭に形成した凹部によつて、第２薄
肉部が形成されていることを特徴とするガスバツグ用パ
ツド。1. A pad for a gas bag which is preliminarily formed with a thin portion for breaking so that the thin portion can be broken at a predetermined portion when the gas bag is expanded. A pad for a gas bag, wherein the second thin portion is formed by a concave portion formed to be narrower than the width of the thin portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62014935A JPH069950B2 (en) | 1987-01-23 | 1987-01-23 | Pad for gas bag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62014935A JPH069950B2 (en) | 1987-01-23 | 1987-01-23 | Pad for gas bag |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63184549A JPS63184549A (en) | 1988-07-30 |
| JPH069950B2 true JPH069950B2 (en) | 1994-02-09 |
Family
ID=11874825
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62014935A Expired - Lifetime JPH069950B2 (en) | 1987-01-23 | 1987-01-23 | Pad for gas bag |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH069950B2 (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0265656U (en) * | 1988-11-08 | 1990-05-17 | ||
| JP2670318B2 (en) * | 1988-11-11 | 1997-10-29 | 日本プラスト株式会社 | Airbag device |
| JPH0726209Y2 (en) * | 1988-12-29 | 1995-06-14 | トヨタ自動車株式会社 | Airbag cover |
| US5217244A (en) * | 1989-07-14 | 1993-06-08 | Tip Engineering Group | Arrangement for forming an air bag deployment opening |
| JPH0694266B2 (en) * | 1989-02-20 | 1994-11-24 | タカタ株式会社 | Airbag storage cover |
| US5280949A (en) * | 1990-03-30 | 1994-01-25 | Mazda Motor Corporation | Air bag device for automobile |
| JP2527074B2 (en) * | 1990-05-24 | 1996-08-21 | タカタ株式会社 | Cover for airbag storage |
| JP2906584B2 (en) * | 1990-05-24 | 1999-06-21 | タカタ株式会社 | Airbag storage cover |
| JP2526171B2 (en) * | 1990-09-28 | 1996-08-21 | 池田物産株式会社 | Airbag device |
| JP3123158B2 (en) * | 1991-12-11 | 2001-01-09 | タカタ株式会社 | Airbag storage cover |
| US5335935A (en) * | 1992-08-31 | 1994-08-09 | Plastic Mold Technology Incorporated | Air bag cover/molded article with integral cover layer of leather |
| EP0894680A1 (en) | 1993-11-22 | 1999-02-03 | Bridgestone Corporation | Method and apparatus for assembling air bags |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52116537A (en) * | 1976-03-26 | 1977-09-30 | Toyota Motor Corp | Expansion type passenger restricting device for automobile or the like |
-
1987
- 1987-01-23 JP JP62014935A patent/JPH069950B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63184549A (en) | 1988-07-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |