JPS6365537B2 - - Google Patents
Info
- Publication number
- JPS6365537B2 JPS6365537B2 JP58122081A JP12208183A JPS6365537B2 JP S6365537 B2 JPS6365537 B2 JP S6365537B2 JP 58122081 A JP58122081 A JP 58122081A JP 12208183 A JP12208183 A JP 12208183A JP S6365537 B2 JPS6365537 B2 JP S6365537B2
- Authority
- JP
- Japan
- Prior art keywords
- curve
- energy absorbing
- cover body
- efficiency
- boss
- 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
Links
Classifications
-
- 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
- B60R21/04—Padded linings for the vehicle interior ; Energy absorbing structures associated with padded or non-padded linings
- B60R21/05—Padded linings for the vehicle interior ; Energy absorbing structures associated with padded or non-padded linings associated with the steering wheel, steering hand lever or steering column
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F7/00—Vibration-dampers; Shock-absorbers
- F16F7/12—Vibration-dampers; Shock-absorbers using plastic deformation of members
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Steering Controls (AREA)
- Vibration Dampers (AREA)
Description
【発明の詳細な説明】
この発明は、ステアリングホイールのボス部位
に組付けられるものであつて、ボス部位に組付け
時横Ｍ字形断面を形成する板金製のエネルギー吸
収体（以下「Ｅ／Ａ体」という）と、軟質プラス
チツクからなりインサート等で形状保持性能を有
するように形成されたカバー体とを組合わせた衝
撃エネルギー吸収構造体（以下「Ｅ／Ａ構造体」
という）に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an energy absorber (hereinafter referred to as "E/A") made of a sheet metal that is assembled to a boss part of a steering wheel and forms a horizontal M-shaped cross section when assembled to the boss part. An impact energy absorbing structure (hereinafter referred to as "E/A structure") that combines a cover body made of soft plastic and formed to have shape retention performance with an insert etc.
related to).
この種のＥ／Ａ構造体としては、例えば第１〜
２図に示すように、ボスプレート１にねじ止めさ
れた板金製のＥ／Ａ体、即ち、ボス部位側面がボ
スプレート１に全面支持されて剛体とされ、取付
け時横Ｍ字形断面を形成する一対の板金製のＥ／
Ａ体２と、ボスプレート１に下側からねじ止めさ
れたカバー体３とを組合わせたものがある。な
お、図例中４はロアカバーである。ここでＥ／Ａ
体２自体の吸収特性曲線（Ｌ−Ｄ曲線）は第３図
ａに示すように降伏荷重値L1までの鋭い立ち上
がり部及び最大変形量Dmaxまでの高原部を有し
ており、それ自体としてはエネルギー吸収効率
（以下「Ｅ／Ａ効率」という）は良好であるが、
Ｅ／Ａ構造体の吸収特性曲線（Ｌ−Ｄ曲線）ｂは
カバー体３のＬ−Ｄ曲線ｃをＥ／Ａ体２のＬ−Ｄ
曲線ａと合成したものとなり、Ｅ／Ａ効率が良好
でない。 This type of E/A structure includes, for example, the first to
As shown in Figure 2, the E/A body made of sheet metal is screwed to the boss plate 1, that is, the side surface of the boss part is fully supported by the boss plate 1, making it a rigid body, and forms a horizontal M-shaped cross section when installed. A pair of sheet metal E/
There is a combination of an A body 2 and a cover body 3 screwed to the boss plate 1 from below. Note that 4 in the figure is a lower cover. E/A here
As shown in Figure 3a, the absorption characteristic curve (L-D curve) of the body 2 itself has a sharp rising part up to the yield load value L1 and a plateau part up to the maximum deformation Dmax. Although the energy absorption efficiency (hereinafter referred to as "E/A efficiency") is good,
The absorption characteristic curve (L-D curve) b of the E/A structure is the L-D curve c of the cover body 3, which is the L-D curve of the E/A structure 2.
This is a combination of curve a and the E/A efficiency is not good.
ここで、Ｅ／Ａ効率とは、例えばＬ−Ｄ曲線ｂ
をＬ＝ｆ(D)とおき、０〜Dmaxの範囲における最
大値をLmax（許容荷重値となる）としたとき、
Ｅ／Ａ効率＝∫Dmax／0ｆ(D)dD／Lmax×Dmax＝Ｓ／Lmax
×Dmax
Ｓ：エネルギー吸収量
であらわされるものである。このＥ／Ａ効率が低
いと、Ｅ／Ａ構造体の設計に際して、一般に
LmaxとＳは定数となるため、Dmaxを大きく、
即ちＥ／Ａ構造体の背を高くする必要があり、ス
テアリングホイールのような限られたスペースに
意匠性を阻害せずセツト可能なＥ／Ａ構造体の設
計が困難となる。 Here, E/A efficiency means, for example, LD curve b
When L = f(D) and the maximum value in the range of 0 to Dmax is Lmax (allowable load value), E/A efficiency = ∫ Dmax / 0 f(D)dD/Lmax x Dmax = S/Lmax
×Dmax S: Expressed by the amount of energy absorbed. If this E/A efficiency is low, it is generally difficult to design an E/A structure.
Since Lmax and S are constants, increase Dmax,
That is, it is necessary to make the E/A structure taller, making it difficult to design an E/A structure that can be set in a limited space such as a steering wheel without impeding the design.
Ｅ／Ａ効率を増大させるためには、カバー体３
のＬ−Ｄ曲線ｃを０〜Dmaxの範囲における荷重
増加の小さいもの、即ち剛性の低いものとすれば
よいが、カバー体３にも形状保持性能を持たせる
必要があるため、それは困難であつた。 In order to increase the E/A efficiency, the cover body 3
It is possible to set the L-D curve c to one with a small increase in load in the range of 0 to Dmax, that is, one with low rigidity, but this is difficult because the cover body 3 also needs to have shape retention performance. Ta.
この発明は上記にかんがみて、カバー体の形状
保持性能を犠牲とすることなく、Ｅ／Ａ効率を増
大させることのできるＥ／Ａ構造体を提供するこ
とを目的とする。 In view of the above, it is an object of the present invention to provide an E/A structure that can increase E/A efficiency without sacrificing the shape retention performance of the cover body.
この発明のＥ／Ａ構造体は、上記構成のものに
おいて、Ｅ／Ａ体の横Ｍ字形断面における三つの
屈曲部のＲを板厚の３〜４倍とすることにより上
記目的に達成するものである。 The E/A structure of the present invention achieves the above object by making the R of the three bent parts in the horizontal M-shaped cross section of the E/A body 3 to 4 times the plate thickness in the structure described above. It is.
以下、この発明を、詳細に説明する。 This invention will be explained in detail below.
第１〜２図に示すようなＥ／Ａ構造体におい
て、第５図に示すようにＥ／Ａ体の横Ｍ字形断
面の三つの屈曲部１５，１６，１７のＲが板厚ｔ
の３〜４倍である。通常の曲げプレスでは、下限
は板厚ｔの略３倍である。 In the E/A structure shown in FIGS. 1 and 2, as shown in FIG.
It is 3 to 4 times that of In a normal bending press, the lower limit is approximately three times the plate thickness t.
この構成のＥ／Ａ体１２は、衝撃荷重を受けた
場合、第４図に示すように変形量20〜30％まで鋭
く立ち上がりその後下降するＬ−Ｄ曲線ａ１を示
す。この理由は、変形量が20〜30％までの弾性変
形域においては直線的に荷重が増大するが、それ
を超えて塑性変形域（座屈変形域）に入ると、第
５図（変形量30％）、変形量60％）に示すよ
うに横Ｍ字形が折畳まれるように変形し、荷重作
用点（屈曲部１５，１７）から変形点（屈曲部１
６）までのモーメントスパンｌが順次長くなり、
低荷重でも折畳みが促進されるためと推定され
る。 When the E/A body 12 having this configuration is subjected to an impact load, it exhibits an LD curve a1 that sharply rises up to a deformation amount of 20 to 30% and then falls, as shown in FIG. The reason for this is that the load increases linearly in the elastic deformation region where the deformation amount is 20 to 30%, but when it exceeds this and enters the plastic deformation region (buckling deformation region), as shown in Figure 5 (deformation amount 30%) and deformation amount (60%), the horizontal M-shape is deformed so as to be folded, and the deformation point (bending part 1
The moment span l up to 6) gradually increases,
This is presumed to be because folding is promoted even under low loads.
これに対し、第６図に示すように、Ｅ／Ａ体
２の屈曲部５，６，７のＲが大きいと−従来は通
常板厚の５倍以上が普通とされていた−、Ｅ／Ａ
体２は前述のように第３図ａに示すようなＬ−Ｄ
曲線を示す。その理由は、塑性変形域において、
第６図，に示すように、屈曲部間５と６、６
と７がそれぞれ湾曲変形しながら、すなわち弾性
変形抵抗を受けながら横Ｍ字形が折畳まれるため
と推定される。 On the other hand, as shown in FIG. 6, if the bending portions 5, 6, and 7 of the E/A body 2 have a large R, which was conventionally considered to be five times or more the normal plate thickness, the E/A body 2 has a large R. A
As mentioned above, the body 2 is L-D as shown in FIG. 3a.
Show a curve. The reason is that in the plastic deformation region,
As shown in FIG.
It is presumed that this is because the horizontal M-shape is folded while being curved and deformed, that is, while being subjected to elastic deformation resistance.
上記Ｅ／Ａ体１２と形状保持性能を有するよう
に形成されたカバー体３とを組合わせたＥ／Ａ構
造体に、衝撃荷重が作用した場合、第４図に示す
ようにその吸収特性曲線（Ｌ−Ｄ曲線）ｂ１は、
Ｅ／Ａ体１２のＬ−Ｄ曲線ａ１とカバー体３のＬ
−Ｄ曲線ｃ１を合成したLmaxの高さに近い高原
部をもつものとなりＥ／Ａ効率が大幅に向上す
る。この発明は、第１〜２図に示す形状のＥ／Ａ
体ばかりでなく、第７図に示すような形状のＥ／
Ａ体１２Ａにも勿論適用できる。なお、図例中、
１８はボスプレートへの取付け用雌ねじである。 When an impact load is applied to the E/A structure, which is a combination of the E/A body 12 and the cover body 3 formed to have shape retention performance, its absorption characteristic curve is as shown in FIG. (LD curve) b1 is
LD curve a1 of E/A body 12 and L of cover body 3
-D curve c1 has a plateau close to the height of Lmax, which is a composite of curve c1, and the E/A efficiency is greatly improved. This invention provides an E/A having the shape shown in FIGS. 1 and 2.
Not only the body, but also the shape of E/ as shown in Figure 7.
Of course, it can also be applied to the A body 12A. In addition, in the illustration,
18 is a female screw for attachment to the boss plate.
この発明のＥ／Ａ構造体は、上記のような構成
なので、カバー体の形状保持性能を犠牲にするこ
となく、Ｅ／Ａ効率を増大させることができる。
従つて、Ｅ／Ａ構造体の背を低くでき、ステアリ
ングホイールのような限られたスペースに意匠性
を阻害せずにセツト可能なＥ／Ａ構造体の設計が
容易となる。 Since the E/A structure of the present invention has the above-described configuration, the E/A efficiency can be increased without sacrificing the shape retention performance of the cover body.
Therefore, the height of the E/A structure can be reduced, and it is easy to design an E/A structure that can be set in a limited space such as a steering wheel without hindering the design.
第１図はこの発明を適用するＥ／Ａ構造体の縦
断面図、第２図は第１図の−線断面図、第３
図は従来のＥ／Ａ構造体のＬ−Ｄ曲線図、第４図
はこの発明におけるＥ／Ａ構造体のＬ−Ｄ曲線
図、第５図はこの発明におけるＥ／Ａ体の変形モ
デル図、第６図は従来におけるＥ／Ａ体の変形モ
デル図、第７図はこの発明を適用できる他のＥ／
Ａ体の斜視図である。
１……ボスプレート、２，１２，１２Ａ……エ
ネルギー吸収体（Ｅ／Ａ体）、３……カバー体、
５，６，７……従来のＥ／Ａ体の屈曲部、１５，
１６，１７……本発明のＥ／Ａ体の屈曲部。
FIG. 1 is a longitudinal cross-sectional view of an E/A structure to which the present invention is applied, FIG. 2 is a cross-sectional view taken along the - line in FIG.
The figure is an L-D curve diagram of a conventional E/A structure, FIG. 4 is an L-D curve diagram of an E/A structure in this invention, and FIG. 5 is a deformed model diagram of an E/A structure in this invention. , FIG. 6 is a deformation model diagram of a conventional E/A body, and FIG. 7 is a diagram of another E/A body to which this invention can be applied.
It is a perspective view of A body. 1... Boss plate, 2, 12, 12A... Energy absorber (E/A body), 3... Cover body,
5, 6, 7...Bending portion of conventional E/A body, 15,
16, 17...Bending portions of the E/A body of the present invention.
Claims (1)
れるものであつて、ボス部位にボス部位側面がボ
スプレートに全面支持されて剛体とされ、組付け
時横Ｍ字形断面を形成する板金製のエネルギー吸
収体と、軟質プラスチツクからなり形状保持性能
を有するように形成されたカバー体とを組合わせ
た衝撃エネルギー吸収構造体において、 前記エネルギー吸収体の横Ｍ字形断面における
三つの屈曲部のＲが板厚の３〜４倍であることを
特徴とする衝撃エネルギー吸収構造体。[Scope of Claims] 1. A sheet metal that is assembled to a boss portion of a steering wheel, the side surface of the boss portion is fully supported by a boss plate to form a rigid body, and forms a transverse M-shaped cross section when assembled. In an impact energy absorbing structure that combines an energy absorbing body made of plastic and a cover body made of soft plastic and formed to have shape retention performance, three bent portions in a horizontal M-shaped cross section of the energy absorbing body An impact energy absorbing structure characterized in that R is 3 to 4 times the thickness of the plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12208183A JPS6015238A (en) | 1983-07-05 | 1983-07-05 | Shock energy absorbing structural body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12208183A JPS6015238A (en) | 1983-07-05 | 1983-07-05 | Shock energy absorbing structural body |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6015238A JPS6015238A (en) | 1985-01-25 |
| JPS6365537B2 true JPS6365537B2 (en) | 1988-12-16 |
Family
ID=14827184
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12208183A Granted JPS6015238A (en) | 1983-07-05 | 1983-07-05 | Shock energy absorbing structural body |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6015238A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5152551A (en) * | 1990-06-28 | 1992-10-06 | Toyoda Gosei Co., Ltd. | Steering wheel having impact absorbing member |
| FR2716429B1 (en) * | 1994-02-23 | 1996-04-05 | Anf Ind | Energy absorber for rail vehicles. |
| GB2608432A (en) * | 2021-07-01 | 2023-01-04 | North Essex Signs Ltd | Impact absorbing device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS531531B2 (en) * | 1972-03-24 | 1978-01-19 |
-
1983
- 1983-07-05 JP JP12208183A patent/JPS6015238A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6015238A (en) | 1985-01-25 |
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