JP3368122B2 - Energy absorbing member - Google Patents
Energy absorbing memberInfo
- Publication number
- JP3368122B2 JP3368122B2 JP29481595A JP29481595A JP3368122B2 JP 3368122 B2 JP3368122 B2 JP 3368122B2 JP 29481595 A JP29481595 A JP 29481595A JP 29481595 A JP29481595 A JP 29481595A JP 3368122 B2 JP3368122 B2 JP 3368122B2
- Authority
- JP
- Japan
- Prior art keywords
- twist
- absorbing member
- energy absorbing
- extruded profile
- longitudinal direction
- 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 - Fee Related
Links
Landscapes
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
- Body Structure For Vehicles (AREA)
- Vibration Dampers (AREA)
Description
【０００１】[0001]
【発明が属する技術分野】本発明はアルミニウム又はア
ルミニウム合金の押出形材（以下、アルミ押出形材とい
う）からなるエネルギー吸収部材に関し、車両用フレー
ムや自動車のバンパーステイなど、特に長手方向の衝撃
を受ける部位に使用されるに好適なエネルギー吸収部材
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an energy absorbing member made of an aluminum or aluminum alloy extruded profile (hereinafter referred to as an aluminum extruded profile), and is particularly effective in a longitudinal direction of a vehicle frame or an automobile bumper stay. The present invention relates to an energy absorbing member suitable for use in a receiving part.
【０００２】[0002]
【従来の技術】近年、地球の温暖化やオゾン層の破壊な
ど環境問題の観点から、大気中の炭酸ガスなどの増加を
抑制するために自動車の軽量化が本格的に検討されてい
る。軽量化の方法には種々あるが、素材の置換、すなわ
ち、従来、主として使用されてきた鋼板の代わりにアル
ミ押出形材を多用することにより軽量化を進めると同時
に、自由な断面形状を得ることのできるアルミ押出形材
の利点を活かして、高性能化、すなわち衝突時のエネル
ギー吸収性を高める検討がなされている。2. Description of the Related Art In recent years, from the viewpoint of environmental problems such as global warming and ozone layer destruction, weight reduction of automobiles has been seriously studied in order to suppress an increase in carbon dioxide gas in the atmosphere. There are various ways to reduce the weight, but by replacing the material, that is, by using aluminum extruded profile instead of the steel sheet that has been mainly used in the past, it is possible to reduce the weight and obtain a free cross-sectional shape. Utilizing the advantages of the extruded aluminum profile, it is being studied to improve performance, that is, to enhance energy absorption at the time of collision.
【０００３】例えば、自動車のフレーム構造において、
エネルギー吸収性を向上させるために、アルミ押出形材
の中空断面に中リブを設けることなどが試みられてい
る。しかし、この場合衝突時の初期荷重と平均荷重（後
述の図５参照）との差が大きくなり、自動車の衝突時に
乗員への衝撃が増すといった問題がある。一方、特開昭
６４−６７４８２号公報には、断面ロの字形の形材の外
周に所定の間隔を置いて複数の溶接ビードを形成し、さ
らにコーナー部に切欠部を設けた自動車のフレーム構造
が記載されている。この構造によれば、長手方向にこの
ような低剛性部を形成することで衝突時の初期荷重を低
減し、その後の平均荷重との差を小さくできるが、溶接
ビードやコーナー部切り欠きの形成はコストアップ要因
となり、また、低剛性部を形成したことで単位重量当り
のエネルギー吸収量が減るため、所期のエネルギー吸収
量を確保するためには材料の肉厚を増やさねばならず、
重量アップとなっていた。また、特開平７−１０１３５
４号公報には、断面コの字形の形材の角部に所定の間隔
をおいて凹部を形成するとともに形材の上下両壁間を連
結するリブを装着した車両用フレームのサイドメンバが
記載されている。この構造においては、上記凹部により
衝突時の初期荷重を低減させるとともに、上記リブによ
り平均荷重を向上させて初期荷重の低減を補っている
が、リブを設けることにより重量アップ及びコストアッ
プとなるという欠点があった。For example, in an automobile frame structure,
In order to improve the energy absorption, it has been attempted to provide an intermediate rib on the hollow cross section of the extruded aluminum profile. However, in this case, there is a problem that the difference between the initial load and the average load (see FIG. 5 described later) at the time of collision becomes large, and the impact on the occupant increases at the time of collision of the automobile. On the other hand, Japanese Laid-Open Patent Publication No. 64-67482 discloses a frame structure of an automobile in which a plurality of weld beads are formed at predetermined intervals on the outer periphery of a rectangular cross-section shaped member, and a notch is provided at a corner. Is listed. According to this structure, by forming such a low-rigidity portion in the longitudinal direction, the initial load at the time of collision can be reduced and the difference from the average load thereafter can be reduced, but the formation of weld beads and corner cutouts is possible. Is a factor of cost increase, and since the energy absorption amount per unit weight is reduced due to the formation of the low-rigidity portion, the wall thickness of the material must be increased to secure the desired energy absorption amount.
The weight had been increased. In addition, JP-A-7-10135
No. 4 discloses a side member of a vehicle frame in which a concave portion is formed at a corner portion of a U-shaped section material at a predetermined interval and a rib connecting between upper and lower walls of the section member is mounted. Has been done. In this structure, the recess reduces the initial load at the time of collision, and the rib improves the average load to compensate for the reduction in the initial load. However, providing the rib increases the weight and the cost. There was a flaw.
【０００４】[0004]
【発明が解決しようとする課題】本発明はかかる従来技
術の問題点に鑑みてなされたもので、初期荷重は減らさ
ずに平均荷重を相対的に向上させ、これにより単位重量
当り大きいエネルギー吸収量をもつエネルギー吸収部材
を得ることを目的とするものである。SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art. The initial load is not reduced and the average load is relatively increased, whereby a large energy absorption amount per unit weight is obtained. The object is to obtain an energy absorbing member having
【０００５】[0005]
【課題を解決するための手段】本発明者らは、アルミ押
出形材のエネルギー吸収量を向上させる対策について種
々の試験を行った結果、アルミ押出形材の長手方向すな
わち、衝突を受ける方向に沿って所定のねじりを加える
ことにより、それが可能となることを見い出した。すな
わち、本発明は、アルミ押出形材において、形材の長手
方向にねじりが形成されているエネルギー吸収部材に関
する。なお、本発明において、長手方向とは押出材の押
出方向になる。 The inventors of the present invention have conducted various tests as a measure for improving the energy absorption amount of the aluminum extruded profile, and as a result, have found that the aluminum extruded profile is in the longitudinal direction, that is, in the direction of collision. It has been found that this can be done by applying a certain twist along. That is, the present invention relates to an energy absorbing member in which a twist is formed in the longitudinal direction of the profile in an aluminum extruded profile. In the present invention, the term “longitudinal direction” means the pushing of the extruded material.
Going out.
【０００６】一般にアルミ押出形材はねじれが生ずるの
を積極的に抑制しており、このようなねじれのないアル
ミ押出形材が従来より自動車用フレームやバンパーステ
イなどに供されている。これに対し、本発明は、アルミ
押出形材を積極的にねじる（長手方向にねじりを形成す
る）ことにより、長手方向に衝撃を受けた場合のエネル
ギー吸収量を顕著に改善し、衝突時の乗員保護性能を向
上させるというものである。長手方向にねじりを形成し
たアルミ押出形材にそのような作用が現れる理由は必ず
しも明確ではないが、アルミ押出形材は長手方向と平行
な向きに衝撃を受けたとき蛇腹状に変形を繰り返して圧
縮荷重を吸収するものであり、ねじりを形成したときは
その変形中にねじりを解消しようとする力が必要となっ
て平均荷重が増加し、結果的にエネルギー吸収量が増加
するものと考えられる。In general, aluminum extruded profiles are positively restrained from twisting, and such extruded aluminum extruded profiles have been conventionally used for automobile frames and bumper stays. On the other hand, the present invention remarkably improves the energy absorption amount when a shock is applied in the longitudinal direction by positively twisting the aluminum extruded profile (forming a twist in the longitudinal direction), and It is intended to improve passenger protection performance. The reason why such an effect appears in an aluminum extruded profile formed with a twist in the longitudinal direction is not always clear, but when an aluminum extruded profile is impacted in a direction parallel to the longitudinal direction, it repeatedly deforms like a bellows. It absorbs a compressive load, and when a twist is formed, it is considered that a force to eliminate the twist is required during the deformation, the average load increases, and as a result, the energy absorption amount increases. .
【０００７】[0007]
【発明の実施の形態】本発明において、アルミ押出形材
に形成されるねじりの程度（角度）は、押出形材の形
状、大きさや材料強度あるいは周辺の部材とのバランス
に応じ適宜設定すればよい。しかし、ねじりが長さ２５
０ｍｍ当り２゜より小さいとねじりによるエネルギー吸
収量の向上効果が明確でなく、これが６０゜を超えると
蛇腹状の変形が起こらなくなりねじり部に集中荷重を受
けて座屈が発生し、エネルギー吸収量が低下する。従っ
て、長さ２５０ｍｍ当り２〜６０゜のねじりが有効であ
り、その範囲内で設定するのがよい。なお、本発明にお
いて長さ２５０ｍｍ当り２〜６０゜のねじりというの
は、長さ方向のどこをとってみてもねじりの程度が上記
範囲内にあるということである。しかし、その範囲内に
あれば必ずしも全体が均一なねじりである必要はなく、
ねじりの強いところ、弱いところがあってもよい。BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, the degree of twist (angle) formed in an aluminum extruded profile may be appropriately set according to the shape, size, material strength of the extruded profile, and balance with surrounding members. Good. However, the twist is 25
If it is less than 2 ° per 0 mm, the effect of improving the amount of energy absorption due to twisting is not clear, and if it exceeds 60 °, bellows-shaped deformation does not occur and buckling occurs due to concentrated load on the twisted part, resulting in energy absorption. Is reduced. Therefore, twisting of 2 to 60 degrees per 250 mm length is effective, and it is preferable to set the twist within that range. In the present invention, the twist of 2 to 60 ° per 250 mm length means that the degree of twist is within the above range regardless of the length direction. However, if it is within that range, it does not necessarily have to be a uniform twist,
There may be strong twists and weak twists.
【０００８】また、本発明においてねじりが形成される
範囲は、押出形材の長さの全体にわたってもよく、長さ
方向の一部範囲のみであってもよい。後者の場合、ねじ
りが形成される範囲が押出形材の全体長さに比べ余りに
短いと、ねじりによるエネルギー吸収量の向上効果が明
確に現れず、特に軽度の衝突の場合ねじりの形成されて
いない部分が先に圧縮変形してしまい、ねじりによるエ
ネルギー吸収の効果がなくなるため、全体長さの１／５
以上を目安とする。Further, in the present invention, the range in which the twist is formed may be the entire length of the extruded profile or only a partial range in the longitudinal direction. In the latter case, if the range where the twist is formed is too short compared to the entire length of the extruded profile, the effect of improving the energy absorption amount due to the twist does not clearly appear, and especially in the case of a mild collision, the twist is not formed. The part is compressed and deformed first, and the effect of energy absorption due to torsion disappears, so 1/5 of the total length
The above is a guideline.
【０００９】図１に本発明に関わるエネルギー吸収部材
の例を模式的に示す。これは長さＬ1（ｍｍ）の全体に
わたり均等にねじりが形成された押出形材（例えば角パ
イプ状）であり、全体のねじり角度θが長さ２５０ｍｍ
当り２°〜６０°、すなわちθ＝（Ｌ1／２５０）×
（２°〜６０°）の範囲内になるように設定される。図
２は、長さＬの押出形材の一部（長さＬ1）にねじりが
形成されたものであり、（Ｌ1／Ｌ）が１／５以上にな
るように設定される。FIG. 1 schematically shows an example of the energy absorbing member according to the present invention. This is an extruded shape member (for example, a square pipe shape) in which the twist is uniformly formed over the entire length L 1 (mm), and the entire twist angle θ is 250 mm.
Per 2 ° to 60 °, i.e. θ = (L 1/250) ×
It is set to fall within the range of (2 ° to 60 °). In FIG. 2, a twist is formed in a part (length L 1 ) of an extruded profile having a length L, and (L 1 / L) is set to be ⅕ or more.
【００１０】本発明は種々の成分系及び組成のアルミ押
出形材に適用できる。また、本発明が適用されるアルミ
押出形材として、典型的にはパイプ状のものや中空状で
中リブを備えた形状のものが挙げられ、その他一部に断
面の閉鎖した中空部を備える形状のもの（図３（ａ）参
照）や、角パイプ形状又は角パイプ形状に対辺をつなぐ
中リブを備えた形状において、辺の一部を切り欠いた形
状のもの（図３（ｂ）〜（ｄ））等、種々の断面形状・
構造を有するアルミ押出形材が挙げられる。The present invention is applicable to aluminum extrusion profiles of various component systems and compositions. Further, as the aluminum extruded profile to which the present invention is applied, typically, a pipe-shaped product or a hollow product having a shape with a middle rib is provided, and the other part is provided with a hollow part having a closed cross section. A shape (see FIG. 3A) or a shape having a square pipe shape or a middle pipe connecting the opposite sides of the square pipe shape with a part of the side cut out (FIG. 3B to FIG. (D)) etc.
An aluminum extruded profile having a structure can be mentioned.
【００１１】本発明に関わるエネルギー吸収部材は、例
えば車両用フレームのフロント又はリアサイドメンバ
等、衝突時のエネルギー吸収を必要とする箇所に、その
長さ方向を予想される衝突の方向（前後方向）に平行に
なるように配置する。このとき、フロント又はリアサイ
ドメンバーの直線部分の全体又は１／５以上の長さ範囲
にわたりねじりが形成されているものとする。側面衝突
を考慮するのであればクロスメンバーへの適用も考えら
れ、また、バンパーステイやその他衝撃時のエネルギー
吸収が必要な他の各種成形品にも適用することができ
る。The energy absorbing member according to the present invention has a length direction which is expected to be the direction of the collision (front-rear direction) at a portion such as a front or rear side member of a vehicle frame which needs to absorb energy at the time of collision. Place it so that it is parallel to. At this time, it is assumed that the twist is formed over the entire straight portion of the front or rear side member or over a length range of 1/5 or more. If a side collision is taken into consideration, it can be applied to a cross member, and can also be applied to bumper stays and other various molded products that require energy absorption at the time of impact.
【００１２】アルミ押出形材の長手方向にねじりを形成
させる手段としては、押出ダイスのチャンバー部の位置
や大きさあるいはベアリング長さや角度を変化させるこ
とによりねじりを形成する方法、ストレッチャーによる
方法、また、マルチベンダーやストレッチベンダーなど
による曲げ加工時にねじりを付加する方法、バルジ成形
やスエージング成形による方法が挙げられる。個別に簡
単に説明すると、押出の場合、上記のような操作により
押出時のメタルフローのバランスを変えてねじりを形成
し、ストレッチャーの場合、片側のチャックをねじりな
がら引っ張るか、両側のチャックを反対方向に回転させ
て引っ張ることでねじりを形成し、マルチベンダーの場
合、可動治具の回転を与えるθ軸を制御することでねじ
りを形成し、ストレッチベンダーの場合、金型に予めね
じりを加工しておき加工時にチャックを回転させてねじ
りを形成し、バルジ成形やスエージング成形の場合、金
型に予めねじりを加工しておき加工時にねじりを形成す
ることができる。As means for forming a twist in the longitudinal direction of the aluminum extruded shape, a method of forming a twist by changing the position and size of the chamber portion of the extrusion die or the bearing length and angle, a method using a stretcher, Further, a method of adding a twist when bending with a multi-bender or a stretch bender, a method of bulge molding or a swaging molding can be mentioned. To briefly explain individually, in the case of extrusion, the metal flow balance during extrusion is changed by the above operation to form a twist, and in the case of a stretcher, pull one side of the chuck while twisting, or pull the chuck on both sides. Twist is formed by rotating in the opposite direction and pulling, in the case of a multi-bender, the twist is formed by controlling the θ axis that gives the rotation of the movable jig, and in the case of a stretch bender, the twist is processed in advance in the mold. The chuck can be rotated to form a twist during processing, and in the case of bulge molding or swaging, the mold can be processed in advance to form the twist during processing.
【００１３】[0013]
【実施例】次に本発明の実施例を示す。ＪＩＳ６０６３
組成のアルミニウム合金を押出成形し、図４に示す１辺
の長さが４０ｍｍ、肉厚が２ｍｍの角パイプを得た。こ
の角パイプに対しマルチベンダーにより所定のねじり加
工（２５０ｍｍ当り０゜〜７０゜）を施し、２５０ｍｍ
の長さに切断した。続いて、ねじり加工による加工硬化
の影響をなくすため、３８０℃の温度に２時間保持後炉
冷によりＯ材とし、供試材（Ｎｏ．１〜６）とした。上
記各供試材に対し、図５に示すように、圧縮試験機を用
いて軸方向に３０ｍｍ／分の速度で１５０ｍｍ圧縮し、
荷重−変位線図（図５に模式的に示す）を得た。なお、
図６の荷重−変位線図において、初期荷重は圧縮初期の
最大荷重、エネルギー吸収量は斜線部の面積（ＴＯＮ・
ｍｍ）、平均荷重はエネルギー吸収量を変位量（１５０
ｍｍ）で除した値である。EXAMPLES Examples of the present invention will be described below. JIS6063
An aluminum alloy having the composition was extruded to obtain a square pipe shown in FIG. 4 having a side length of 40 mm and a wall thickness of 2 mm. This square pipe is subjected to a predetermined twisting process (0 ° to 70 ° per 250 mm) by a multi-bender, and 250 mm
Cut to length. Subsequently, in order to eliminate the effect of work hardening due to the twisting process, the sample was held at a temperature of 380 ° C. for 2 hours and then cooled into a furnace to obtain an O material, which was used as a test material (No. 1 to 6). As shown in FIG. 5, each of the test materials was compressed 150 mm axially at a speed of 30 mm / min using a compression tester,
A load-displacement diagram (schematically shown in FIG. 5) was obtained. In addition,
In the load-displacement diagram of FIG. 6, the initial load is the maximum load in the initial stage of compression, and the energy absorption amount is the area of the shaded area (TON.
mm), the average load is the energy absorption amount and the displacement amount (150
mm) divided by.
【００１４】表１に荷重−変位線図から求めた各供試材
についての初期荷重とエネルギー吸収量を記載した。エ
ネルギー吸収量の欄のカッコ内の数字は、供試材ＮＯ．
１のエネルギー吸収量と比較したときの向上率である。
また、エネルギー吸収量の向上率が３％未満のものを
×、３％以上を○と評価し、これを表１の評価の欄に記
載した。Table 1 shows the initial load and the energy absorption amount for each test material obtained from the load-displacement diagram. The numbers in parentheses in the column of energy absorption amount are the test material No.
It is the improvement rate when compared with the energy absorption amount of 1.
In addition, when the improvement rate of the energy absorption amount was less than 3%, x was evaluated as x, and 3% or more was evaluated as o, which is shown in the evaluation column of Table 1.
【００１５】[0015]
【表１】 [Table 1]
【００１６】表１に示すように、ねじり角度を２°〜６
０°に設定した供試材２〜４は初期荷重が供試材１と同
等で、かつエネルギー吸収性が向上している。しかし、
ねじり角度を７０°に設定した供試材５は初期荷重は供
試材と同等であるが、ねじり角度が大きすぎたため座屈
が発生した。As shown in Table 1, the twist angle is from 2 ° to 6 °.
The test materials 2 to 4 set to 0 ° have the same initial load as the test material 1, and have improved energy absorption. But,
Although the initial load of the test material 5 in which the twist angle was set to 70 ° was the same as that of the test material, buckling occurred because the twist angle was too large.
【００１７】[0017]
【発明の効果】本発明によれば、アルミ押出形材に適量
のねじりを形成することで、同等の初期荷重であっても
平均荷重を高め単位重量当りのエネルギー吸収量を高め
ることができる。逆にいえば、同じエネルギー吸収量で
あれば、初期荷重を減らし部材の重量を減らすことがで
きる。本発明に関わるエネルギー吸収部材を、例えば車
両用フレームのフロント又はリアサイドメンバやクロス
メンバ、あるいはバンパーステイ、その他衝撃時のエネ
ルギー吸収が必要な各種成形品に適用すれば、衝撃特性
の向上による薄肉化ができるので、製品の軽量化に大き
く貢献できる。EFFECTS OF THE INVENTION According to the present invention, by forming a proper amount of twist in an extruded aluminum profile, the average load can be increased and the energy absorption amount per unit weight can be increased even with the same initial load. Conversely, if the amount of energy absorbed is the same, the initial load can be reduced and the weight of the member can be reduced. If the energy absorbing member according to the present invention is applied to, for example, a front or rear side member or a cross member of a vehicle frame, a bumper stay, or various molded products that need to absorb energy at the time of impact, thinning due to improved impact characteristics is achieved. Therefore, it can greatly contribute to the weight reduction of the product.
【図１】本発明に関わるエネルギー吸収部材の模式的斜
視図（ａ）及び平面図（ｂ）である。FIG. 1 is a schematic perspective view (a) and a plan view (b) of an energy absorbing member according to the present invention.
【図２】同じく本発明に関わるエネルギー吸収部材の模
式的斜視図である。FIG. 2 is a schematic perspective view of an energy absorbing member according to the present invention.
【図３】押出形材の断面形状を例示する図である。FIG. 3 is a diagram illustrating a cross-sectional shape of an extruded profile.
【図４】実施例の押出形材の断面形状及び寸法を説明す
る図である。FIG. 4 is a diagram illustrating a cross-sectional shape and dimensions of an extruded shape material of an example.
【図５】圧縮試験機による実施例の試験要領を説明する
図である。FIG. 5 is a diagram illustrating a test procedure of an example using a compression tester.
【図６】圧縮試験で得られる荷重−変位線図の模式図で
ある。FIG. 6 is a schematic diagram of a load-displacement diagram obtained in a compression test.
フロントページの続き (56)参考文献 特開 平７−173584（ＪＰ，Ａ) 特開 平７−257426（ＪＰ，Ａ) 特開 平７−118782（ＪＰ，Ａ) 特開 平６−247337（ＪＰ，Ａ) 特開 平７−145842（ＪＰ，Ａ) 特開 平５−305876（ＪＰ，Ａ) 特開 昭64−67482（ＪＰ，Ａ) 特開 平７−101354（ＪＰ，Ａ) 実開 平５−12361（ＪＰ，Ｕ) 実開 平４−67577（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) B62D 21/15 B62D 25/20 Continuation of front page (56) Reference JP-A-7-173584 (JP, A) JP-A-7-257426 (JP, A) JP-A-7-118782 (JP, A) JP-A-6-247337 (JP , A) JP 7-145842 (JP, A) JP 5-305876 (JP, A) JP 64-67482 (JP, A) JP 7-101354 (JP, A) 5-12361 (JP, U) Actual Kaihei 4-67577 (JP, U) (58) Fields surveyed (Int.Cl. 7 , DB name) B62D 21/15 B62D 25/20
Claims (6)
出形材からなり、その長手方向に衝撃を受けたとき蛇腹
状に変形して圧縮荷重を吸収するエネルギー吸収部材に
おいて、長手方向にねじりが形成されていることを特徴
とするエネルギー吸収部材。1. A bellows made of an extruded profile of aluminum or an aluminum alloy, when subjected to a shock in its longitudinal direction.
Energy absorbing member that deforms into a shape and absorbs a compressive load
In the energy absorbing member, a twist is formed in the longitudinal direction.
上の範囲にわたり形成されていることを特徴とする請求
項１に記載されたエネルギー吸収部材。2. The energy absorbing member according to claim 1, wherein the twist is formed over a range of ⅕ or more of the length of the extruded profile.
たり形成されていることを特徴とする請求項１に記載さ
れたエネルギー吸収部材。3. The energy absorbing member according to claim 1, wherein the twist is formed over the entire length of the extruded profile.
２〜６０゜であることを特徴とするである請求項１〜３
のいずれかに記載されたエネルギー吸収部材。4. The method according to claim 1, wherein the twist angle is 2 to 60 ° per 250 mm length.
The energy absorbing member described in any one of 1.
により強制的に形成されたねじりであることを特徴とす
る請求項１〜４に記載されたエネルギー吸収部材。5. The energy absorbing member according to claim 1, wherein the twist is a twist that is forcibly formed during extrusion or bending.
ネルギー吸収部材を構成要素の一部とする車両用フレー
ムにおいて、該エネルギー吸収部材の長手方向が衝撃方
向と平行となるように配置されていることを特徴とする
車両用フレーム。6. A vehicle frame having the energy absorbing member according to any one of claims 1 to 5 as a part of its constituent elements, wherein the longitudinal direction of the energy absorbing member is arranged in parallel with the impact direction. A vehicle frame characterized by being
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29481595A JP3368122B2 (en) | 1995-10-17 | 1995-10-17 | Energy absorbing member |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29481595A JP3368122B2 (en) | 1995-10-17 | 1995-10-17 | Energy absorbing member |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09109920A JPH09109920A (en) | 1997-04-28 |
| JP3368122B2 true JP3368122B2 (en) | 2003-01-20 |
Family
ID=17812618
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29481595A Expired - Fee Related JP3368122B2 (en) | 1995-10-17 | 1995-10-17 | Energy absorbing member |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3368122B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19820433A1 (en) * | 1998-05-07 | 1999-11-11 | Emitec Emissionstechnologie | Support structure with a deformation element with oblique force transmission |
| US6199941B1 (en) | 1998-05-08 | 2001-03-13 | Toyota Jidosha Kabushiki Kaisha | Impact energy absorbing structure in upper vehicle body portion and impact energy absorbing member |
| JP5114676B2 (en) * | 2008-05-27 | 2013-01-09 | 新日鐵住金株式会社 | Steel hollow columnar member |
-
1995
- 1995-10-17 JP JP29481595A patent/JP3368122B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH09109920A (en) | 1997-04-28 |
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