JP2001080438A - Energy absorbing member - Google Patents
Energy absorbing memberInfo
- Publication number
- JP2001080438A JP2001080438A JP26440199A JP26440199A JP2001080438A JP 2001080438 A JP2001080438 A JP 2001080438A JP 26440199 A JP26440199 A JP 26440199A JP 26440199 A JP26440199 A JP 26440199A JP 2001080438 A JP2001080438 A JP 2001080438A
- Authority
- JP
- Japan
- Prior art keywords
- side walls
- impact
- absorbing member
- energy absorbing
- deformation
- 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.)
- Granted
Links
Landscapes
- Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)
- Vibration Dampers (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、車体と内装材との
間にて衝撃エネルギを吸収し、その衝撃を緩和するエネ
ルギ吸収部材に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an energy absorbing member that absorbs impact energy between a vehicle body and an interior material and reduces the impact.
【０００２】[0002]
【関連する背景技術】この種のエネルギ吸収部材として
は例えば、実開平７−１３５３３号公報に記載された衝
撃緩衝部材が挙げられる。この公知の緩衝部材はドアイ
ンナパネルとドアライニングとの間に介装され、側突時
の衝撃荷重により変形することで、その衝撃エネルギを
吸収する中空の構造体を有している。具体的には、この
構造体はドアインナパネルの内面に向けて一端が開口し
た函形状をなしており、個々の側壁はその開口に対して
傾斜したものとなっている。このような構造体によれ
ば、衝撃の入力方向に対して側壁の座屈方向が一定の向
きに定型化されるので、単にリブだけの構造体に比べて
衝撃緩衝値の設定が容易であると考えられる。2. Related Background Art An example of this kind of energy absorbing member is an impact buffering member described in Japanese Utility Model Laid-Open Publication No. Hei 7-13533. This known buffer member is interposed between the door inner panel and the door lining, and has a hollow structure that is deformed by an impact load at the time of a side collision to absorb the impact energy. Specifically, this structure has a box shape with one end opened toward the inner surface of the door inner panel, and each side wall is inclined with respect to the opening. According to such a structure, the buckling direction of the side wall is standardized in a fixed direction with respect to the direction of input of the shock, so that it is easier to set the shock buffering value as compared with a structure having only ribs. it is conceivable that.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、上述し
た公知の構造体にあっては、側突時に隣り合う側壁同士
が複雑な座屈を生じるため、構造体全体としての変形ス
トロークが少ない。すなわち、このような構造体は通
常、一体成形されており、それ故、隣り合う側壁同士
は、その角（コーナ）を介して一体的に連なった状態に
ある。このため、これら側壁は角の部分が互いに折り重
なった状態で座屈し、その折り重なり部分にて積層を厚
くする。従って、構造体全体として潰れ残りを生じ、そ
の分だけ衝撃吸収のための変形ストロークを十分に得る
ことができない。However, in the above-mentioned known structure, the side walls adjacent to each other at the time of a side collision cause complicated buckling, so that the deformation stroke of the whole structure is small. That is, such a structure is usually formed integrally, and therefore, the adjacent side walls are in a state of being integrally connected via the corner (corner). For this reason, these side walls buckle in a state where corner portions are folded over each other, and the lamination is thickened at the folded portion. Therefore, the structure remains uncrushed as a whole, and the deformation stroke for absorbing the shock cannot be sufficiently obtained.
【０００４】本発明は上述した事情に基づいてなされた
もので、その目的とするところは、衝撃の入力に対する
構造体の潰れ残りをなくし、構造体全体としての衝撃吸
収ストロークを有効に活用できる効率のよいエネルギ吸
収部材を提供することにある。The present invention has been made based on the above-described circumstances, and an object of the present invention is to eliminate the remaining collapse of a structure in response to a shock input, and to efficiently utilize a shock absorbing stroke of the entire structure. To provide a good energy absorbing member.
【０００５】[0005]
【課題を解決するための手段】上記の目的を達成するた
め、本発明のエネルギ吸収部材は中空の角錐台状をなす
構造体を有しており、特にその厚みに関し、側壁を相互
に繋ぐ角の厚みを、側壁本体の厚みに対して薄く形成し
たものとなっている。上述したエネルギ吸収部材によれ
ば、構造体がその軸線方向に衝撃荷重を受けて変形する
際、このような荷重は構造体を全体的に膨らませるた
め、個々の側壁は構造体の外側に突出して変形しようと
する。このため、構造体は先ず、その斜稜に沿って亀裂
を生じ、隣り合う側壁同士がその角にて互いに引き裂か
れる。この後、隣り合う側壁同士は完全に分離した状態
で、それぞれ独立して座屈を生じる。従って、側壁が座
屈により相互に重なり合うことがないので、構造体は全
体としての潰れ残りがなく、その変形ストロークを全て
有効に活用して効率よく衝撃エネルギを吸収することが
できる。なお、構造体は側壁の座屈による変形ストロー
ク分のエネルギ吸収に加えて、その引き裂きによるせん
断でもエネルギを吸収可能な点で更に有利である。In order to achieve the above object, the energy absorbing member of the present invention has a hollow truncated pyramid-shaped structure, and particularly with respect to its thickness, an angle connecting the side walls to each other. Is formed thinner than the thickness of the side wall body. According to the above-described energy absorbing member, when the structure is deformed by receiving an impact load in the axial direction, such a load swells the structure as a whole, so that each side wall projects outside the structure. Try to deform. For this reason, the structure first cracks along its oblique ridge, and adjacent side walls are torn apart at their corners. Thereafter, the adjacent side walls are buckled independently while being completely separated from each other. Therefore, since the side walls do not overlap with each other due to buckling, the structure does not remain uncrushed as a whole, and the deformation energy can be effectively utilized and the impact energy can be efficiently absorbed. The structure is more advantageous in that it can absorb energy not only by the deformation stroke due to the buckling of the side wall but also by the shearing due to the tearing.
【０００６】[0006]
【発明の実施の形態】本発明のエネルギ吸収部材は、車
両のボデー部材とその内装材との間に介装されて、例え
ば、車室内から内装材を介して衝撃の入力を受けたと
き、その衝撃エネルギを吸収して、ボデー部材から受け
る衝撃の反力を緩和するべく機能するものである。DESCRIPTION OF THE PREFERRED EMBODIMENTS The energy absorbing member of the present invention is interposed between a body member of a vehicle and an interior material thereof, for example, when an impact is received from a vehicle interior through an interior material. It functions to absorb the impact energy and reduce the reaction force of the impact received from the body member.
【０００７】図１を参照すると、一実施例のエネルギ吸
収部材はベース２を有しており、このベース２に多数の
構造体４が規則的に分布して形成されている。但し、構
造体４の個数及びその配列に関して特に限定はなく、適
宜、その分布形態を変更してもよい。図２を参照すれば
より明らかなように、個々の構造体４は例えば、中空の
四角錐台状をなしており、その基底は全面が開口してい
る。但し、構造体４の外形は図示の四角錐台に限定され
ておらず、その他の多角錐台であってもよいし、複数種
類の角錐台が混在していてもよい。Referring to FIG. 1, the energy absorbing member of one embodiment has a base 2 on which a number of structures 4 are formed in a regular distribution. However, the number and arrangement of the structures 4 are not particularly limited, and the distribution form may be changed as appropriate. As is clear from FIG. 2, each of the structures 4 is, for example, in the shape of a hollow truncated pyramid, and its base is entirely open. However, the outer shape of the structure 4 is not limited to the truncated quadrangular pyramid shown in the figure, and may be another polygonal truncated pyramid or a mixture of a plurality of types of pyramidal truncated pyramids.
【０００８】本実施例のエネルギ吸収部材は通常、その
ベース２をボデー部材６の内面に宛った状態で配置さ
れ、一方、構造体４の天井８を内装材１０の内面に当接
させている。なお、この配置にもまた限定はなく、ベー
ス２が内装材１０の内面に宛って配置されていてもよ
い。次に、図３に示されるように、実施例のエネルギ吸
収部材は、例えば一組の成形型を用いて一体的に成形す
ることができ、具体的には、個々の構造体４は射出成形
型におけるキャビティ型１２及びコア型１４の間にて形
成される。The energy absorbing member of the present embodiment is usually arranged with its base 2 directed to the inner surface of the body member 6, while the ceiling 8 of the structure 4 is brought into contact with the inner surface of the interior material 10. I have. Note that this arrangement is not limited, and the base 2 may be arranged on the inner surface of the interior material 10. Next, as shown in FIG. 3, the energy absorbing member of the embodiment can be integrally molded using, for example, a set of molds. Specifically, the individual structures 4 are formed by injection molding. It is formed between the cavity mold 12 and the core mold 14 in the mold.
【０００９】より詳しくは、図４に示されるように、上
述した角に対応するキャビティ型１２のコーナ部分１８
は、所定の曲率Ｒを有している。これに対し、コア型１
４のコーナ部分２０はエッジ状をなしており、図示の型
合わせ状態にて、これらコーナ部分１８，２０間には最
小間隔ｔｃが確保されている。一方、構造体４の側壁１
６本体に対応する部分は互いに平行に延びており、その
最小間隔ｔｗは上述の間隔ｔｃよりも大きい。従って、
これらキャビティ型１２及びコア型１４により成形され
た構造体４において、隣り合う側壁１６を相互に繋ぐ角
の厚みｔｃは、個々の側壁１６本体の厚みｔｗよりも薄
く形成される。More specifically, as shown in FIG. 4, the corner portion 18 of the cavity mold 12 corresponding to the above-mentioned corner is provided.
Has a predetermined curvature R. In contrast, core type 1
The fourth corner portion 20 has an edge shape, and a minimum interval tc is secured between the corner portions 18 and 20 in the illustrated matching state. On the other hand, the side wall 1 of the structure 4
The portions corresponding to the six main bodies extend in parallel with each other, and the minimum interval tw is larger than the above-described interval tc. Therefore,
In the structure 4 formed by the cavity mold 12 and the core mold 14, the thickness tc of the corner connecting the adjacent side walls 16 to each other is formed to be smaller than the thickness tw of each side wall 16 main body.
【００１０】次に、図５〜図７を参照して衝撃入力時の
構造体４の変形について説明する。図５に示されるよう
に、エネルギ吸収部材に対して衝撃が入力されると、そ
の衝撃荷重Ｆは、個々の構造体４により分担される。そ
して、この衝撃荷重Ｆにより構造体４が軸線方向に圧縮
されると、側壁１６全てに略同一の変形を生じる。この
とき、構造体４が中空の角錐台状をなしていることか
ら、側壁１６の変形は、その長手方向でみて中央部分を
構造体４の外側に突出させようとするので、隣り合う側
壁１６間には、互いにその側縁を引き離す力が働く。こ
のような側壁１６の変形に伴い、構造体４はその薄肉化
された四隅、つまり、四角錐台の斜稜Ｓに亀裂を生じ、
隣り合う側壁１６同士が角にて引き裂かれる（図６参
照）。Next, the deformation of the structure 4 when an impact is input will be described with reference to FIGS. As shown in FIG. 5, when an impact is input to the energy absorbing member, the impact load F is shared by the individual structures 4. When the structure 4 is compressed in the axial direction by the impact load F, substantially the same deformation occurs on all the side walls 16. At this time, since the structure 4 is in the shape of a hollow truncated pyramid, the deformation of the side wall 16 tends to make the central portion project outside the structure 4 when viewed in the longitudinal direction. A force acts to separate the side edges from each other. Along with such deformation of the side wall 16, the structure 4 has cracks in the thinned four corners, that is, the slope S of the truncated pyramid,
Adjacent side walls 16 are torn at corners (see FIG. 6).
【００１１】この後、個々の側壁１６は互いに分離した
状態で、それぞれ独立に座屈するので、この際、隣り合
う側壁１６同士が重なり合うことはない。従って、図７
に示されるように、構造体４はその最大ストロークＬだ
け潰れることができる。図８を参照すると、上述した構
造体４の変形に伴う荷重吸収特性が示されている。図示
のように、構造体４の負担荷重はその変形初期から大き
く立ち上がっており、この荷重が所定値ｆ1に達した時
点で、上述した側壁１６同士の引き裂き（せん断）が生
じる。Thereafter, the individual side walls 16 buckle independently of each other in a state of being separated from each other. At this time, the adjacent side walls 16 do not overlap with each other. Therefore, FIG.
The structure 4 can be collapsed by its maximum stroke L as shown in FIG. Referring to FIG. 8, there is shown a load absorption characteristic accompanying the deformation of the structure 4 described above. As shown, the burden load of the structure 4 is risen significantly from its deformed initial, when this load reaches a predetermined value f 1, tear between the side wall 16 described above (shear) occurs.
【００１２】この後、負担荷重は一旦落ち込むものの、
側壁１６の更なる変形に伴って上昇し、そして、所定の
座屈荷重ｆ2に達した時点で側壁１６に座屈が生じる。
側壁１６が完全に座屈すると、構造体４が完全に潰れる
ので、その負担荷重は急激に落ち込む。この間に構造体
４により吸収される全衝撃エネルギは、図８中、ハッチ
ングを施した領域で表される。このとき、上述のように
隣り合う側壁１６同士の重なり合いがなく、構造体４が
その最大ストロークＬだけ完全に潰れることができれ
ば、１回の変形あたりエネルギ吸収量を極大化すること
ができる。また、本実施例の構造体４は側壁１６の座屈
に加えて、そのせん断でもエネルギを吸収可能であり、
所定の変形量が得られる（図８参照）点で更に有利であ
る。After this, although the burden load temporarily drops,
The side wall 16 rises with further deformation, and buckling occurs on the side wall 16 when a predetermined buckling load f 2 is reached.
When the side wall 16 is completely buckled, the structure 4 is completely crushed, so that the burden load drops sharply. The total impact energy absorbed by the structure 4 during this time is represented by a hatched area in FIG. At this time, as described above, if there is no overlap between the adjacent side walls 16 and the structure 4 can be completely crushed by the maximum stroke L, the amount of energy absorption per deformation can be maximized. In addition, the structure 4 of this embodiment can absorb energy not only by buckling of the side wall 16 but also by shearing.
This is further advantageous in that a predetermined amount of deformation can be obtained (see FIG. 8).
【００１３】なお、図８に示される構造体４の荷重吸収
特性は、側壁１６の厚みｔｗ及びその角の厚みｔｃを適
宜に設定することで、所望にコントロールすることがで
きる。また、厚みｔｃの調整は、キャビティ型１２にお
けるコーナ部１８の曲率Ｒの変更により、容易に可能で
ある。本発明は上述した一実施例に制約されることな
く、種々に変形して実施可能である。上述の実施例で
は、構造体４の成形に際し、そのキャビティ型１２のコ
ーナ部１８をアール加工しているが、このコーナ部１８
はすみ肉状に面取りされていてもよい。The load absorbing characteristics of the structure 4 shown in FIG. 8 can be controlled as desired by appropriately setting the thickness tw of the side wall 16 and the thickness tc of the corner. Further, the thickness tc can be easily adjusted by changing the curvature R of the corner portion 18 in the cavity mold 12. The present invention can be implemented in various modifications without being limited to the above-described embodiment. In the above-described embodiment, the corner portion 18 of the cavity mold 12 is rounded when the structure 4 is molded.
It may be chamfered into a fillet.
【００１４】また、上述した実施例のエネルギ吸収部材
では、ベース２の一方の面のみに構造体４を突出して形
成しているが、その両面に構造体４が突出して形成され
ていてもよい。In the energy absorbing member of the embodiment described above, the structure 4 is formed so as to protrude only on one surface of the base 2, but the structure 4 may be formed so as to protrude from both surfaces. .
【００１５】[0015]
【発明の効果】以上説明したように、本発明のエネルギ
吸収部材によれば、その変形ストロークを有効に活用し
て効率よく衝撃エネルギを吸収することができるので、
限られたスペースでその機能を最大に発揮できる。従っ
て、ボデー部材と内装材との間に介装するべきエネルギ
吸収部材として非常に好適である。As described above, according to the energy absorbing member of the present invention, the impact energy can be efficiently absorbed by effectively utilizing the deformation stroke.
Its functions can be maximized in a limited space. Therefore, it is very suitable as an energy absorbing member to be interposed between the body member and the interior material.
【図１】エネルギ吸収部材の斜視図である。FIG. 1 is a perspective view of an energy absorbing member.
【図２】構造体の縦断面を含む斜視図である。FIG. 2 is a perspective view including a longitudinal section of the structure.
【図３】成形型による構造体の成形を説明するための図
である。FIG. 3 is a diagram for explaining molding of a structure using a molding die.
【図４】図３中、IＶ−IＶ線に沿う断面図である。FIG. 4 is a sectional view taken along the line IV-IV in FIG.
【図５】構造体の変形過程を説明するための図である。FIG. 5 is a diagram for explaining a deformation process of the structure.
【図６】構造体の側壁にせん断を生じたときの状態を示
す図である。FIG. 6 is a diagram showing a state when shearing occurs on the side wall of the structure.
【図７】構造体の最終的な変形状態を示した断面図であ
る。FIG. 7 is a sectional view showing a final deformed state of the structure.
【図８】構造体の荷重吸収特性を示した図である。FIG. 8 is a diagram showing load absorption characteristics of a structure.
４ 構造体 ６ ボデー部材 １０ 内装材 １６ 側壁 4 Structure 6 Body member 10 Interior material 16 Side wall
Claims (1)
設される内装材との間に介装され、衝撃の入力により変
形することで、その衝撃エネルギを吸収可能な構造体を
有したエネルギ吸収部材において、 前記構造体は、前記ボデー部材及び前記内装材の一方に
沿う基底からその他方に向けて延びる複数の側壁を有し
た中空の角錐台からなり、これら側壁を相互に繋ぐ角の
厚みは、その側壁本体の厚みよりも薄く形成されている
ことを特徴とするエネルギ吸収部材。1. A vehicle having a structure interposed between a body member of a vehicle and an interior material disposed along an inner surface thereof and capable of absorbing the impact energy by being deformed by the input of an impact. In the energy absorbing member, the structure includes a hollow truncated pyramid having a plurality of side walls extending from a base along one of the body member and the interior material toward the other side, and has an angle connecting these side walls to each other. An energy absorbing member having a thickness smaller than a thickness of the side wall main body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26440199A JP3654339B2 (en) | 1999-09-17 | 1999-09-17 | Energy absorbing member |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26440199A JP3654339B2 (en) | 1999-09-17 | 1999-09-17 | Energy absorbing member |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001080438A true JP2001080438A (en) | 2001-03-27 |
| JP3654339B2 JP3654339B2 (en) | 2005-06-02 |
Family
ID=17402659
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26440199A Expired - Fee Related JP3654339B2 (en) | 1999-09-17 | 1999-09-17 | Energy absorbing member |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3654339B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007055549A (en) * | 2005-08-26 | 2007-03-08 | Kasai Kogyo Co Ltd | Interior trimming part for automobile |
| JP2017180496A (en) * | 2016-03-28 | 2017-10-05 | 日本プラスト株式会社 | Energy absorption member |
| CN114746668A (en) * | 2019-12-04 | 2022-07-12 | 株式会社爱世克私 | Cushioning material, cushioning structure, shoe sole, and shoe |
-
1999
- 1999-09-17 JP JP26440199A patent/JP3654339B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007055549A (en) * | 2005-08-26 | 2007-03-08 | Kasai Kogyo Co Ltd | Interior trimming part for automobile |
| JP2017180496A (en) * | 2016-03-28 | 2017-10-05 | 日本プラスト株式会社 | Energy absorption member |
| CN114746668A (en) * | 2019-12-04 | 2022-07-12 | 株式会社爱世克私 | Cushioning material, cushioning structure, shoe sole, and shoe |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3654339B2 (en) | 2005-06-02 |
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