JP4457302B2 - Shock absorber for automobile - Google Patents

Shock absorber for automobile Download PDF

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JP4457302B2
JP4457302B2 JP2004359863A JP2004359863A JP4457302B2 JP 4457302 B2 JP4457302 B2 JP 4457302B2 JP 2004359863 A JP2004359863 A JP 2004359863A JP 2004359863 A JP2004359863 A JP 2004359863A JP 4457302 B2 JP4457302 B2 JP 4457302B2
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plate
rib
impact
absorbing member
pair
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JP2006062635A5 (en
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勝 村山
錬太郎 加藤
光一 前田
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Sumitomo Riko Co Ltd
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本発明は、例えば自動車のバンパや車室を形成する車室形成部材等に好適に採用される自動車用衝撃吸収部材に関する。   The present invention relates to an automobile impact absorbing member that is suitably employed, for example, as a vehicle bumper or a vehicle compartment forming member that forms a vehicle compartment.

従来より、自動車においては、衝突時の衝撃を吸収して人身や車体を保護するために、車体フレームや車室形成部材等に種々の衝撃吸収部材が採用されている。例えば、車体フレームの前後部には、自動車の衝突時に衝撃エネルギを吸収するためのバンパが取付けられている。このようなバンパは、一般的に、車体フレームにねじ止め等により取付けられた鉄製のクラッシュボックスと、クラッシュボックスの外側に取付けられた鉄製のバンパビームと、バンパビームの外側に取付けられた樹脂製のバンパフェイシアとから構成されている。   2. Description of the Related Art Conventionally, in automobiles, various impact absorbing members have been adopted for body frames, vehicle compartment forming members, and the like in order to protect the human body and the vehicle body by absorbing the impact at the time of collision. For example, bumpers for absorbing impact energy at the time of a car collision are attached to the front and rear portions of the body frame. Such bumpers are generally made of an iron crash box attached to the body frame by screwing or the like, an iron bumper beam attached to the outside of the crash box, and a resin bumper attached to the outside of the bumper beam. It consists of Fascia.

このバンパは、低速走行中等に発生する軽衝突時には、柔軟な樹脂からなるバンパフェイシアが衝突相手にソフトに衝突して弾性変形することにより衝撃エネルギを吸収する。これにより、衝突相手側へのダメージを軽減することができ、特に歩行者等の人身を保護することができる。しかし、衝突相手側へのダメージを少なくするためには、バンパフェイシアの充分な弾性変形量が必要であり、その分バンパフェイシアの大きな変形スペースが必要となる。   In the case of a light collision that occurs during low-speed traveling or the like, this bumper absorbs impact energy by a soft bumper fascia made of a soft resin that softly collides with a collision partner and elastically deforms. Thereby, the damage to the collision partner side can be reduced, and especially a person such as a pedestrian can be protected. However, in order to reduce the damage to the collision partner side, a sufficient amount of elastic deformation of the bumper fascia is required, and accordingly, a large deformation space of the bumper fascia is required.

また、高速走行中等に車体どうしや車体と構造物等との衝突により発生する重衝突時には、鉄製のバンパビームやクラッシュボックスが塑性変形して潰れることにより大きな衝撃エネルギを吸収する。これにより、車体や乗員等に及ぼされるダメージを軽減することができる。これらバンパビームやクラッシュボックスは、一般的には、鉄系やアルミニウム系等の金属により形成されていることから、重量の増大を回避するため、その内部に中空部を有するような中空構造にされている。   Further, during a heavy collision caused by collision between the vehicle bodies or between the vehicle body and a structure during high-speed traveling or the like, the iron bumper beam or the crash box is plastically deformed and crushed to absorb a large impact energy. Thereby, the damage given to a vehicle body, a passenger | crew, etc. can be reduced. Since these bumper beams and crash boxes are generally made of metal such as iron or aluminum, they have a hollow structure with a hollow portion inside to avoid an increase in weight. Yes.

なお、バンパビームの強度を向上させるためには、補強板を追加したり(特許文献1参照。)、バンパビームを形成する金属板の肉厚を厚くしたり、バンパビームの中空部に発泡ウレタン等の発泡弾性体を充填したりする(特許文献2参照。)等の手法が採用されている。   In order to improve the strength of the bumper beam, a reinforcing plate is added (see Patent Document 1), the thickness of the metal plate forming the bumper beam is increased, or foamed urethane foam or the like is formed in the hollow portion of the bumper beam. A technique such as filling an elastic body (see Patent Document 2) is employed.

ところで、近年においては、歩行者との衝突時における歩行者の安全性がより高いレベルで要求されるようになり、特に、歩行者と衝突する恐れの高いバンパに対しても、より高い衝撃エネルギ吸収機能を有することが要求されるようになっている。   By the way, in recent years, pedestrian safety at the time of a collision with a pedestrian has been required at a higher level, and in particular, a higher impact energy is required even for a bumper that is likely to collide with a pedestrian. It is required to have an absorption function.

そこで、この要求に対処するため、対人衝突に見合った低い衝突荷重でエネルギ吸収に必要な断面方向の変形を生じさせることができるようにした対人保護用エネルギ吸収部材が提案されている(特許文献3参照。)。このエネルギ吸収部材は、車体前後方向に略平行に設けられた前面フランジと後面フランジ及びこれらのフランジ間をつなぐ略平行に設けられた左右のウエブとから構成され、各ウエブは各々外側方に向かって湾曲しているアルミニウム合金中空形材からなるものである。   Therefore, in order to cope with this requirement, there has been proposed an energy absorbing member for protecting a person that can cause a deformation in a cross-sectional direction necessary for energy absorption with a low collision load corresponding to the person collision (Patent Document). 3). This energy absorbing member is composed of a front flange and a rear flange provided substantially parallel to the longitudinal direction of the vehicle body, and left and right webs provided between these flanges, and each web is directed outward. It is made of an aluminum alloy hollow shape that is curved.

しかし、このエネルギ吸収部材は、アルミニウム合金中空形材からなるものであることから、樹脂材料と比較して重量の増加を招きやすく、燃費の点で不利になる。   However, since this energy absorbing member is made of an aluminum alloy hollow shape, it tends to cause an increase in weight as compared with a resin material, which is disadvantageous in terms of fuel consumption.

一方、近年においては、衝突時における乗員の安全性もより高いレベルで要求されるようになり、特に、乗員の頭部が衝突する恐れの高い車室形成部材のルーフサイド部に対しても、より高い衝撃エネルギ吸収機能を有することが要求されるようになっている。   On the other hand, in recent years, occupant safety at the time of a collision has come to be required at a higher level, especially for the roof side portion of the vehicle compartment forming member that is highly likely to collide with the head of the occupant. It is required to have a higher impact energy absorbing function.

そこで、この要求に対処するため、例えば特許文献4には、車室形成部材としてのルーフパネルと、そのルーフパネルの内側に配置される天井材(内装部品)との間に、発泡ウレタン等からなる衝撃吸収部材を配設することが開示されている。また、例えば特許文献5には、車室形成部材としてのパネルと、そのパネルの室内側に配設されるトリム部材(内装部品)との間に、樹脂材料で形成された所定構造のリブ部を有するエネルギ吸収体を介設することが開示されている。   Therefore, in order to cope with this requirement, for example, Patent Document 4 discloses a foamed urethane or the like between a roof panel as a vehicle compartment forming member and a ceiling material (interior part) arranged inside the roof panel. Disposing an impact absorbing member is disclosed. Further, for example, Patent Document 5 discloses a rib portion having a predetermined structure formed of a resin material between a panel as a vehicle compartment forming member and a trim member (interior part) disposed on the indoor side of the panel. It is disclosed that an energy absorber having a gap is interposed.

上記のように、比較的低い衝撃荷重が入力したときに衝撃エネルギを吸収する衝撃吸収部材として、樹脂材料で所定形状に形成された成形体が従来より知られており、この衝撃吸収部材は、大きく二つに分類できる。   As described above, as a shock absorbing member that absorbs shock energy when a relatively low impact load is input, a molded body formed in a predetermined shape with a resin material has been conventionally known. There are two main categories.

一つは、発泡ウレタンや発泡PP(ポリプロピレン)等の発泡弾性体であって、例えば、バンパに形成された中空部内に充填配置されて使用されたり(特許文献1の図49参照。)、車室形成部材と内装部品との間に配設されて使用される(特許文献4参照。)。しかし、この発泡弾性体は、衝撃荷重入力時の荷重と変位量の関係を表す線図において比較的フラットな特性曲線を示し、エネルギ吸収効率は比較的良好であるが、潰れ残りが大きく、スペース効率が悪いという点で問題となる。   One is a foamed elastic body such as foamed urethane or foamed PP (polypropylene). For example, the foamed elastic body is used by being placed in a hollow portion formed in a bumper (see FIG. 49 of Patent Document 1). It is used by being disposed between the chamber forming member and the interior part (see Patent Document 4). However, this foamed elastic body shows a relatively flat characteristic curve in the diagram showing the relationship between the load and the amount of displacement at the time of impact load input, and the energy absorption efficiency is relatively good, but the crushing residue is large, and the space This is problematic in that it is inefficient.

もう一つは、PPやPE(ポリエチレン)、ABS樹脂等で形成されたリブ構造体であって、例えば特許文献5に開示されているように、車室形成部材と内装部品との間に配設されて使用される。このリブ構造体は、衝撃入力方向に延びるように配置されたリブが衝撃入力時に座屈変形することによって衝撃エネルギを吸収する。しかし、このリブ構造体は、一般的に初期の衝撃荷重が大きくなりやすいことから、衝突相手への衝撃が大きくなりやすい点で問題となる。また、このリブ構造体は、射出成形で作製されるため、長尺のものは製造コストが高くなりやすい。
特開平6−171441号公報 特開2001−132787号公報 特開2004−90910号公報 特開2001−322506号公報 特開平11−192907号公報
The other is a rib structure formed of PP, PE (polyethylene), ABS resin, or the like, and is disposed between a vehicle compartment forming member and an interior part as disclosed in Patent Document 5, for example. Installed and used. In this rib structure, a rib arranged so as to extend in an impact input direction absorbs impact energy by buckling deformation at the time of impact input. However, this rib structure has a problem in that the initial impact load tends to be large, and the impact on the collision partner tends to be large. Moreover, since this rib structure is produced by injection molding, the long structure tends to increase the manufacturing cost.
JP-A-6-171441 JP 2001-132787 A JP 2004-90910 A JP 2001-322506 A Japanese Patent Laid-Open No. 11-192907

本発明は上記実状に鑑みてなされたものであり、低い衝撃荷重が入力した際に良好な衝撃エネルギ吸収機能を発揮し、人身の保護を有利になし得る自動車用衝撃吸収部材を提供することを解決すべき課題とするものである。   The present invention has been made in view of the above circumstances, and provides an automobile impact absorbing member that exhibits a good impact energy absorbing function when a low impact load is input and can advantageously protect the human body. This is a problem to be solved.

上記課題を解決する本発明の自動車用衝撃吸収部材は、衝撃荷重入力方向に対して略直交する方向に延びるように配置される樹脂製の板状リブと、該板状リブの両端にそれぞれの一端が連結されるとともにそれぞれの該一端から前記板状リブと直角方向へ遠ざかるに連れてそれぞれの他端が互いに接近するように傾斜して配置され、衝撃荷重入力時に前記板状リブを引張変形させる一対の板状保持部と、を備え、該板状保持部は、曲げ弾性率が0.8Gpa以上の樹脂材料で形成されているとともに、該板状保持部の肉厚は、前記板状リブの肉厚よりも厚くされていることを特徴としている。 The automobile impact absorbing member of the present invention that solves the above problems includes a resin-made plate-like rib disposed so as to extend in a direction substantially orthogonal to the impact load input direction, and both ends of the plate-like rib. One end is connected and the other end is inclined so as to approach each other as the distance from the one end in a direction perpendicular to the plate rib, and the plate rib is pulled and deformed when an impact load is input. A pair of plate-like holding portions, and the plate- like holding portion is formed of a resin material having a bending elastic modulus of 0.8 Gpa or more, and the thickness of the plate-like holding portion is the plate shape It is characterized by being thicker than the thickness of the rib .

本発明の自動車用衝撃吸収部材は、例えば自動車のバンパや車室形成部材等の所定の部位に、板状リブが衝撃荷重入力方向に対して略直交する方向に延びるように配置されて、一対の板状保持部の両他端部が固定された状態に取付けられる。この状態に取付けられた衝撃吸収部材に対して低い衝撃荷重が入力すると、板状リブが一対の板状保持部の両他端部に接近するように変位する。このとき、一対の板状保持部の両一端部が互いに遠ざかるように変位することにより、板状リブの両端が遠ざかるように引っ張られて板状リブが引張変形させられ、この板状リブの引張変形によって衝撃エネルギが吸収される。   The automobile impact absorbing member of the present invention is disposed, for example, at a predetermined portion such as an automobile bumper or a vehicle compartment forming member so that the plate-like ribs extend in a direction substantially orthogonal to the impact load input direction. The other end portions of the plate-like holding portion are attached in a fixed state. When a low impact load is input to the impact absorbing member attached in this state, the plate-like ribs are displaced so as to approach the other end portions of the pair of plate-like holding portions. At this time, both end portions of the pair of plate-shaped holding portions are displaced away from each other, so that both ends of the plate-shaped ribs are pulled away and the plate-shaped ribs are pulled and deformed. The impact energy is absorbed by the deformation.

このように、樹脂製の板状リブの良好な伸び特性や引張特性を利用して衝撃エネルギが吸収されることから、初期の衝撃荷重が急激に大きくならず、しかも板状リブの引張変形が継続的に行われるので初期の衝撃荷重の低下が極めて少ないため、効率良く衝撃エネルギが吸収される。特に、本発明では、板状保持部は、ある程度の剛性を確保するために、JIS−K7171で定義する曲げ弾性率が0.8Gpa以上の樹脂材料で形成されているので、衝撃荷重入力時に板状リブをより確実に引張変形させることが可能となる。さらに、板状保持部の肉厚は、板状リブの肉厚よりも厚くされていることから、板状保持部の充分な剛性が確保されるため、板状リブを確実に引張変形させることができる。なお、板状保持部の中央部の肉厚を両端部よりも厚くした場合には、板状保持部の更に充分な剛性を確保することができる。また、一対の板状保持部及び板状リブは、衝撃荷重入力方向に折り畳まれることがないので潰れ残りが小さくなるため、より大きな衝撃エネルギ吸収量の確保が可能となる。したがって、本発明の自動車用衝撃吸収部材は、低い衝撃荷重が入力した際に良好な衝撃エネルギ吸収機能を発揮し、人身の保護を有利になし得る。 Thus, since the impact energy is absorbed by utilizing the good elongation characteristics and tensile characteristics of the resin plate-shaped ribs, the initial impact load does not increase suddenly, and the plate-shaped ribs are not deformed in tension. Since the process is continuously performed, the initial impact load is hardly reduced, so that the impact energy is efficiently absorbed. In particular, in the present invention, the plate-like holding portion is made of a resin material having a flexural modulus defined by JIS-K7171 of 0.8 Gpa or more in order to ensure a certain degree of rigidity. The ribs can be more reliably pulled and deformed. Furthermore, since the thickness of the plate-like holding part is made thicker than the thickness of the plate-like rib, sufficient rigidity of the plate-like holding part is ensured, so that the plate-like rib is surely pulled and deformed. Can do. In addition, when the thickness of the center part of the plate-shaped holding part is made thicker than both end parts, it is possible to ensure a further sufficient rigidity of the plate-shaped holding part. In addition, since the pair of plate-shaped holding portions and the plate-shaped ribs are not folded in the direction of impact load input, the remaining crush is reduced, so that a larger amount of shock energy absorption can be ensured. Therefore, the impact absorbing member for automobiles of the present invention exhibits a good impact energy absorbing function when a low impact load is input, and can advantageously protect human bodies.

本発明において、板状リブは、引張破断伸びが100%以上、引張降伏応力が15Mpa以上の樹脂材料で形成されているのが好ましい。このようにすれば、衝撃荷重入力時に板状保持部によって引張変形させられる板状リブの引張変形に対する良好な特性を確保することができるので、良好な衝撃エネルギ吸収性能を確保することができる。なお、ここでの引張破断伸び及び引張降伏応力とは、JIS−K7162でそれぞれ定義する引張破断伸び及び引張降伏応力のことをいう。この板状リブの板厚は、0.4〜4.0mm程度にされているものが好適となる。   In the present invention, the plate-like rib is preferably formed of a resin material having a tensile elongation at break of 100% or more and a tensile yield stress of 15 Mpa or more. By doing so, it is possible to ensure good characteristics against tensile deformation of the plate-like ribs that are tensile-deformed by the plate-like holding portion when an impact load is input, and thus it is possible to ensure good impact energy absorption performance. Here, the tensile elongation at break and the tensile yield stress refer to the tensile elongation at break and the tensile yield stress defined by JIS-K7162, respectively. The thickness of the plate-like rib is preferably about 0.4 to 4.0 mm.

板状リブを形成する樹脂材料としては、例えば、熱可塑性樹脂組成物(未来化成株式会社製、品番「YV−20−2001」)、PC(ポリカーボネート)、PC/PBT(ポリブチレンテレフタレート)アロイ、PP(ポリプロピレン)、PE(ポリエチレン)、ABS(アクリロニトリル・ブタジエン・スチレン)等を好適に採用することができる。これらの樹脂材料のうちで、熱可塑性樹脂組成物(未来化成株式会社製、品番「YV−20−2001」)は、曲げ弾性率が0.8Gpa以上、引張破断伸びが100%以上、引張降伏応力が15Mpa以上であるため、特に好適に採用することができる。   Examples of the resin material for forming the plate-like rib include a thermoplastic resin composition (manufactured by Mirai Kasei Co., Ltd., product number “YV-20-2001”), PC (polycarbonate), PC / PBT (polybutylene terephthalate) alloy, PP (polypropylene), PE (polyethylene), ABS (acrylonitrile / butadiene / styrene) and the like can be suitably employed. Among these resin materials, a thermoplastic resin composition (manufactured by Mirai Kasei Co., Ltd., product number “YV-20-2001”) has a flexural modulus of 0.8 Gpa or more, a tensile elongation at break of 100% or more, and a tensile yield. Since stress is 15 Mpa or more, it can employ | adopt especially suitably.

本発明において、一対の板状保持部は、略筒状に形成されて二対の板状保持部を有する筒状部材によって構成することができる。この筒状部材は、断面形状が円形や楕円に限らず、例えば六角形や八角形のような多角形のものを採用することができる。この場合の衝撃吸収部材は、筒状部材の内周に一つ又は二つの板状リブの両端が連結されることにより構成される。   In the present invention, the pair of plate-like holding portions can be configured by a cylindrical member that is formed in a substantially cylindrical shape and has two pairs of plate-like holding portions. The cylindrical member is not limited to a circular shape or an oval shape in cross section, and may be a polygonal shape such as a hexagon or an octagon. The shock absorbing member in this case is configured by connecting both ends of one or two plate-like ribs to the inner periphery of the cylindrical member.

例えば板状リブが一つの場合には、板状リブの両端にそれぞれの一端が連結されて板状リブの一面側に配置される一対の第1板状保持部と板状リブの両端にそれぞれの一端が連結されて板状リブの他面側に配置される一対の第2板状保持部とを有する筒状部材が採用される。この場合、一対の第1板状保持部の他端どうし及び一対の第2板状保持部の他端どうしは、板状連結部によって連結される。各対の板状保持部の他端どうしを連結する板状連結部は、筒状部材の周方向において2箇所に設けられており、そのうちの少なくとも1箇所の板状連結部が取付固定部として利用される。この板状連結部の肉厚は、衝撃荷重入力時に一対の板状保持部の他端部の位置固定をより確実にするために、板状リブの肉厚よりも厚くされているのが好ましい。   For example, when there is one plate-shaped rib, one end is connected to both ends of the plate-shaped rib, and a pair of first plate-shaped holding portions disposed on one surface side of the plate-shaped rib and both ends of the plate-shaped rib, respectively The cylindrical member which has a pair of 2nd plate-shaped holding | maintenance part arrange | positioned on the other surface side of a plate-shaped rib is connected. In this case, the other ends of the pair of first plate-like holding portions and the other ends of the pair of second plate-like holding portions are connected by the plate-like connecting portion. The plate-like connecting portions that connect the other ends of each pair of plate-like holding portions are provided at two locations in the circumferential direction of the cylindrical member, and at least one of the plate-like connecting portions serves as an attachment fixing portion. Used. The thickness of the plate-like connecting portion is preferably larger than the thickness of the plate-like ribs in order to more reliably fix the position of the other end of the pair of plate-like holding portions when an impact load is input. .

なお、一方の板状連結部の箇所が取付固定部として利用される場合には、その板状連結部を排除するように軸方向に延びるスリットを形成し、そのスリットの両側に位置する板状保持部にそれぞれ取付固定部を設けるようにしてもよい。   In addition, when the place of one plate-shaped connection part is utilized as an attachment fixing | fixed part, the slit extended in an axial direction is formed so that the plate-shaped connection part may be excluded, and the plate shape located in the both sides of the slit You may make it provide an attachment fixing part in a holding | maintenance part, respectively.

また、板状リブが二つの場合には、一方の板状リブの両端にそれぞれの一端が連結される一対の第1板状保持部と、他方の板状リブの両端にそれぞれの一端が連結される一対の第2板状保持部とを有する筒状部材が採用される。この筒状部材は、一対の第1板状保持部の他端どうしを連結する板状連結部と、一対の第2板状保持部の他端どうしを連結する板状連結部に加えて、両板状リブの一端どうし及び他端どうしをそれぞれ連結する一対の板状連結部を有するように構成され、隣り合う板状保持部の間に合計四つの板状連結部を有する。この場合、一対の第1板状保持部の他端どうしを連結する板状連結部と一対の第2板状保持部の他端どうしを連結する板状連結部は、上記のように板状リブが一つの場合と同様にすることができる。   In addition, when there are two plate-shaped ribs, a pair of first plate-shaped holding portions whose one ends are connected to both ends of one plate-shaped rib, and one ends connected to both ends of the other plate-shaped rib. A cylindrical member having a pair of second plate-shaped holding portions is employed. In addition to the plate-like connecting portion that connects the other ends of the pair of first plate-like holding portions and the plate-like connecting portion that connects the other ends of the pair of second plate-like holding portions, It is comprised so that it may have a pair of plate-shaped connection part which connects the one end of both plate-shaped ribs, and the other end, respectively, and has a total of four plate-shaped connection parts between adjacent plate-shaped holding parts. In this case, the plate-like connecting portion that connects the other ends of the pair of first plate-like holding portions and the plate-like connecting portion that connects the other ends of the pair of second plate-like holding portions are plate-shaped as described above. This can be the same as in the case of one rib.

本発明において、板状保持部及び板状連結部は、板状リブと同種の上記した樹脂で形成したものを採用することができる。樹脂製のものは、入力する衝撃荷重が比較的低い場合に対応できるので、バンパ用の衝撃吸収部材に好適となる。 In the present invention, the plate-shaped holding portion and the plate-like connecting portion, can be employed also to that formed by the resin mentioned above the plate-like ribs and the like. Made of resin, since it corresponds to the case impact load input is relatively low, that Do a suitable impact absorbing member for a bumper.

なお、一対の板状保持部を板状リブと同じ樹脂材料で一体に形成する場合、成形処理は、従来より公知の方法を採用することができるが、特に、長尺ものの製造に有利な押出成形等の採用が可能である。   In addition, when a pair of plate-shaped holding parts are integrally formed of the same resin material as the plate-shaped rib, a conventionally known method can be adopted as the molding process, but an extrusion that is particularly advantageous for manufacturing a long one. It is possible to adopt molding or the like.

本発明の自動車用衝撃吸収部材は、衝撃荷重入力方向に対して略直交する方向に延びるように配置される樹脂製の板状リブと、該板状リブの両端にそれぞれの一端が連結されるとともにそれぞれの該一端から前記板状リブと直角方向へ遠ざかるに連れてそれぞれの他端が互いに接近するように傾斜して配置され、衝撃荷重入力時に前記板状リブを引張変形させる一対の板状保持部と、を備え、板状保持部は、曲げ弾性率が0.8Gpa以上の樹脂材料で形成されているとともに、板状保持部の肉厚は、板状リブの肉厚よりも厚くされているため、低い衝撃荷重が負荷された際に良好な衝撃エネルギ吸収機能を発揮し、人身の保護を有利になし得る。 The shock absorbing member for automobiles of the present invention has a resin-made plate-like rib arranged so as to extend in a direction substantially orthogonal to the shock load input direction, and one end of each of the plate-like ribs connected to both ends. And a pair of plate-like plates that are inclined so that the other ends approach each other as they move away from the plate-like ribs in a direction perpendicular to each other, and tensilely deform the plate-like ribs when an impact load is input. The plate-like holding part is made of a resin material having a flexural modulus of 0.8 Gpa or more, and the thickness of the plate-like holding part is made thicker than the thickness of the plate-like rib. Therefore, when a low impact load is applied, a good impact energy absorbing function is exhibited, and personal protection can be advantageously performed.

以下、本発明の実施形態を図面に基づいて説明する。
〔実施形態1〕
図1は本実施形態に係る自動車用衝撃吸収部材の軸直角方向の断面図であり、図2はその自動車用衝撃吸収部材の斜視図である。
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[Embodiment 1]
FIG. 1 is a cross-sectional view in the direction perpendicular to the axis of an automobile impact absorbing member according to this embodiment, and FIG. 2 is a perspective view of the automobile impact absorbing member.

本実施形態の衝撃吸収部材は、図1及び図2に示すように、樹脂材料で一体に形成された長尺略筒状の成形体からなるものであって、略平行に配置された二つの板状リブ1、2と、一対の第1板状保持部31、32と一対の第2板状保持部33、34と四つの板状連結部35〜38とからなり板状リブ1、2を内部に保持する筒状部材3と、から構成されている。   As shown in FIGS. 1 and 2, the impact absorbing member of the present embodiment is composed of a long and substantially cylindrical molded body integrally formed of a resin material, and includes two substantially parallel molded bodies. The plate-like ribs 1 and 2 are composed of plate-like ribs 1 and 2, a pair of first plate-like holding portions 31 and 32, a pair of second plate-like holding portions 33 and 34, and four plate-like connecting portions 35 to 38. And a cylindrical member 3 that holds the inside.

二つの板状リブ1、2は、略一定の肉厚1.2mmで、幅寸法W4が70mmとされた平板状に形成されている。この板状リブ1、2は、板状連結部17、18の幅寸法に相当する距離を隔てて略平行に配置されている。   The two plate-like ribs 1 and 2 are formed in a flat plate shape having a substantially constant thickness of 1.2 mm and a width dimension W4 of 70 mm. The plate-like ribs 1 and 2 are arranged substantially in parallel with a distance corresponding to the width dimension of the plate-like connecting portions 17 and 18.

筒状部材3は、周方向に距離を隔てて配列された一対の第1板状保持部31、32及び一対の第2板状保持部33、34と、隣り合う各板状保持部31〜34の端部どうしを連結するように周方向において4箇所に配置された板状連結部35〜38とからなり、断面形状が八角形の筒状に形成されている。一対の第1板状保持部31、32は、一方の板状リブ1の幅方向両端にそれぞれの一端が連結されるとともに、それぞれの他端どうしが板状連結部35により連結されている。これにより、一対の第1板状保持部31、32は、板状リブ1の両端に連結されたそれぞれの一端から板状リブ1と直角方向へ遠ざかるに連れてそれぞれの他端どうしが接近するように傾斜して配置されている。板状連結部35は、板状リブ1と略平行に配置されている。   The cylindrical member 3 includes a pair of first plate-like holding portions 31 and 32 and a pair of second plate-like holding portions 33 and 34 arranged at a distance in the circumferential direction, and adjacent plate-like holding portions 31 to 31. It consists of plate-like connecting portions 35 to 38 arranged at four locations in the circumferential direction so as to connect the end portions of 34, and the cross-sectional shape is formed in an octagonal cylindrical shape. The pair of first plate-like holding portions 31, 32 are connected to both ends in the width direction of one plate-like rib 1, and the other ends are connected to each other by a plate-like connecting portion 35. As a result, the pair of first plate-like holding portions 31, 32 come closer to each other end as they move away from the plate-like rib 1 in the direction perpendicular to the one end connected to both ends of the plate-like rib 1. It is arranged so as to be inclined. The plate-like connecting portion 35 is disposed substantially parallel to the plate-like rib 1.

また、一対の第2板状保持部33、34は、他方の板状リブ2の幅方向両端にそれぞれの一端が連結されるとともに、それぞれの他端どうしが板状連結部36により連結されている。これにより、一対の第1板状保持部31、32は、板状リブ2の両端に連結されたそれぞれの一端から板状リブ2と直角方向へ遠ざかるに連れてそれぞれの他端どうしが接近するように傾斜して配置されている。板状連結部36は、板状リブ2と略平行に配置されている。そして、両板状リブ1、2の一端どうしは板状連結部37により連結され、両板状リブ1、2の他端どうしは板状連結部38により連結されている。   Each of the pair of second plate-shaped holding portions 33 and 34 has one end connected to both ends in the width direction of the other plate-shaped rib 2 and the other end connected to each other by a plate-shaped connecting portion 36. Yes. Accordingly, the other ends of the pair of first plate-like holding portions 31 and 32 approach each other as they move away from the plate-like rib 2 in the direction perpendicular to the respective ends connected to both ends of the plate-like rib 2. It is arranged so as to be inclined. The plate-like connecting portion 36 is disposed substantially parallel to the plate-like rib 2. One end of each plate-like rib 1, 2 is connected by a plate-like connecting portion 37, and the other end of both plate-like ribs 1, 2 is connected by a plate-like connecting portion 38.

各第1及び第2板状保持部31〜34は、外面が平面とされ、内面は中央部が内方へ膨らむように湾曲面とされていることにより、中央部の肉厚が両端部よりも厚くなるようにされており、その中央部の肉厚は4.4mmとされている。各第1及び第2板状保持部31〜34の幅寸法W1は35mmとされている。また、第1板状保持部31、32の他端どうしを連結する板状連結部35と第2板状保持部33、34の他端どうしを連結する板状連結部36も、外面が平面とされ、内面は中央部が内方へ膨らむように湾曲面とされていることにより、中央部の肉厚が両端部よりも厚くなるようにされており、その中央部の肉厚は4.4mmとされている。各板状連結部35、36の幅寸法W2は20mmとされている。   Each of the first and second plate-shaped holding portions 31 to 34 has a flat outer surface, and a curved surface so that the inner surface swells inward at the inner surface. The thickness of the central part is 4.4 mm. The width dimension W1 of each 1st and 2nd plate-shaped holding | maintenance parts 31-34 is 35 mm. The plate-like connecting portion 35 that connects the other ends of the first plate-like holding portions 31 and 32 and the plate-like connecting portion 36 that connects the other ends of the second plate-like holding portions 33 and 34 are also flat on the outer surface. The inner surface is curved so that the central portion swells inwardly, so that the thickness of the central portion is thicker than that of both end portions. 4 mm. The width dimension W2 of each plate-like connecting portion 35, 36 is 20 mm.

また、両板状リブ1、2の一端どうしを連結する板状連結部37と両板状リブ1、2の他端どうしを連結する板状連結部38は、外面及び内面が平面とされて略一定の肉厚3mmにされており、各第1及び第2板状保持部31〜34の肉厚よりも少し薄くされている。よって、第1及び第2板状保持部31〜34と四つの板状連結部35〜38とからなる筒状部材3の肉厚は、板状リブ1、2の肉厚よりも厚くされている。各板状連結部17、18の幅寸法W3は26mmとされている。   Further, the plate-like connecting portion 37 that connects one ends of both plate-like ribs 1 and 2 and the plate-like connecting portion 38 that connects the other ends of both plate-like ribs 1 and 2 have a flat outer surface and inner surface. The thickness is substantially constant 3 mm, which is a little thinner than the thickness of each of the first and second plate-shaped holding portions 31 to 34. Therefore, the thickness of the cylindrical member 3 composed of the first and second plate-like holding portions 31 to 34 and the four plate-like connecting portions 35 to 38 is made thicker than the thickness of the plate-like ribs 1 and 2. Yes. The width dimension W3 of each plate-like connection part 17 and 18 is 26 mm.

本実施形態の衝撃吸収部材は、熱可塑性樹脂組成物(未来化成株式会社製、品番「YV−20−2001」)により形成された押出成形材を所定寸法に切断した後、所定の湾曲形状に整形加工することにより作製されている。これにより、筒状部材3の第1及び第2板状保持部31〜34は、曲げ弾性率が0.8Gpa以上とされ、板状リブ1、2は、引張破断伸びが100%以上、引張降伏応力が15Mpa以上とされている。   The impact-absorbing member of the present embodiment is obtained by cutting an extrusion-molded material formed from a thermoplastic resin composition (manufactured by Mirai Kasei Co., Ltd., product number “YV-20-2001”) into a predetermined curved shape. It is made by shaping. Accordingly, the first and second plate-like holding portions 31 to 34 of the cylindrical member 3 have a flexural modulus of 0.8 Gpa or more, and the plate-like ribs 1 and 2 have a tensile elongation at break of 100% or more. The yield stress is 15 Mpa or more.

以上のように構成された本実施形態の自動車用衝撃吸収部材は、例えば図3及び図4に示すように、自動車の前後部に装備されるバンパに対して取付けられ、歩行者保護用として使用される。この衝撃吸収部材は、車体フレーム(図示せず)の前部に一対のクラッシュボックス5、5を介して取付けられた鉄製のバンパビーム6の前面(車体フレームの後部の場合は後面)に、取付固定部となる板状連結部35の外面が接着剤で固着されることにより取付けられており、バンパビーム6とこれの外側に取付けられるバンパフェイシア7との間に配設されている。この場合、衝撃吸収部材は、板状リブ1、2が衝撃荷重入力方向(主として図4における矢印x方向)に対して略直交する方向(略上下方向)に延びるように配置された状態に取付けられている。   The automobile impact absorbing member of the present embodiment configured as described above is attached to a bumper mounted on the front and rear parts of an automobile and used for pedestrian protection, for example, as shown in FIGS. Is done. This shock absorbing member is fixedly attached to the front surface of the iron bumper beam 6 (rear surface in the case of the rear portion of the vehicle body frame) attached to the front portion of the vehicle body frame (not shown) via a pair of crash boxes 5 and 5. The plate-like connecting portion 35 which is a part is attached by being fixed with an adhesive, and is disposed between the bumper beam 6 and the bumper fascia 7 attached to the outside thereof. In this case, the shock absorbing member is mounted in a state in which the plate-like ribs 1 and 2 are arranged so as to extend in a direction (substantially up and down direction) substantially orthogonal to the shock load input direction (mainly the arrow x direction in FIG. 4). It has been.

このように衝撃吸収部材が取付けられた自動車が低速走行中に歩行者と衝突して、バンパフェイシア7に低い衝撃荷重が入力すると、バンパフェイシア7の弾性変形に伴う変位によって、その衝撃荷重が衝撃吸収部材に入力し、衝撃吸収部材はバンパビーム6とバンパフェイシア7により衝撃荷重入力方向(主として図4における矢印x方向)に圧縮される。これにより、衝撃吸収部材は、図5(a)〜(e)に示すように、衝撃荷重入力方向において対向する両板状連結部35、36が接近するように変形する。このとき、第1板状保持部31、32の板状リブ1側の端部どうし、及び第2板状保持部33、34の板状リブ2側の端部どうしが互いに遠ざかるように変位することにより、板状リブ1、2の両端が遠ざかるように引っ張られて板状リブ1、2が引張変形させられ、この板状リブ1、2の引張変形によって衝撃エネルギが効率良く吸収される。   When a vehicle with a shock absorbing member attached in this way collides with a pedestrian during low-speed driving and a low impact load is input to the bumper fascia 7, the impact load is impacted by the displacement accompanying the elastic deformation of the bumper fascia 7. The shock absorbing member is input to the absorbing member, and the shock absorbing member is compressed by the bumper beam 6 and the bumper fascia 7 in the impact load input direction (mainly in the direction of the arrow x in FIG. 4). Thereby, as shown to Fig.5 (a)-(e), an impact-absorbing member deform | transforms so that the both plate-shaped connection parts 35 and 36 which oppose in an impact load input direction may approach. At this time, the end portions on the plate rib 1 side of the first plate holding portions 31 and 32 and the end portions on the plate rib 2 side of the second plate holding portions 33 and 34 are displaced away from each other. As a result, the plate-like ribs 1 and 2 are pulled away from each other so that the plate-like ribs 1 and 2 are tensilely deformed, and the impact energy is efficiently absorbed by the tensile deformation of the plate-like ribs 1 and 2.

このように、樹脂製の板状リブ1、2の良好な伸び特性や引張特性を利用して衝撃エネルギが吸収されることから、初期の衝撃荷重が急激に大きくならず、しかも板状リブ1、2の引張変形が継続的に行われるので初期の衝撃荷重の低下が極めて少ないため、極めて効率良く衝撃エネルギが吸収される。また、本実施形態の衝撃吸収部材では、各第1及び第2板状保持部31〜34及び板状リブ1、2は、衝撃荷重入力方向に折り畳まれることがないので潰れ残りが小さくなるため、限られた設置スペースにおいても大きな衝撃エネルギ吸収量の確保が可能となる。よって、衝突相手の歩行者に及ぼされるダメージが大幅に軽減され、歩行者の保護が確実になされる。   Thus, since the impact energy is absorbed by utilizing the good elongation characteristics and tensile characteristics of the resin plate-like ribs 1 and 2, the initial impact load does not increase rapidly, and the plate-like rib 1 Since the tensile deformation of No. 2 is continuously performed, the initial impact load is hardly reduced, so that the impact energy is absorbed very efficiently. Further, in the impact absorbing member of the present embodiment, each of the first and second plate-like holding portions 31 to 34 and the plate-like ribs 1 and 2 is not folded in the direction of impact load input, so that the remaining crushing is small. Even in a limited installation space, it is possible to secure a large amount of impact energy absorption. Therefore, the damage given to the colliding partner's pedestrian is greatly reduced, and the pedestrian is reliably protected.

以上のように、本実施形態の衝撃吸収部材は、樹脂材料で一体に形成された成形体からなり、衝撃荷重入力方向に対して略直交する方向に延びるように配置される二つの板状リブ1、2と、板状リブ1、2の両端にそれぞれの一端が連結されて衝撃荷重入力時に板状リブ1、2を引張変形させる第1及び第2板状保持部31〜34を有する筒状部材3と、から構成されているため、低い衝撃荷重が負荷された際に良好な衝撃エネルギ吸収機能を発揮することができ、歩行者の保護を確実に且つ有利になすことができる。   As described above, the impact absorbing member of the present embodiment is formed of a molded body integrally formed of a resin material, and has two plate-like ribs arranged so as to extend in a direction substantially orthogonal to the impact load input direction. 1 and 2 and cylinders having first and second plate-like holding portions 31 to 34 that are connected to both ends of the plate-like ribs 1 and 2 to pull and deform the plate-like ribs 1 and 2 when an impact load is input. Therefore, when a low impact load is applied, a good impact energy absorption function can be exhibited, and pedestrian protection can be reliably and advantageously performed.

また、本実施形態の衝撃吸収部材は、長尺ものの製造に有利な押出成形で作製することができるので、製造コストの上昇を回避することができる。   Moreover, since the impact-absorbing member of this embodiment can be produced by extrusion molding which is advantageous for manufacturing a long product, an increase in manufacturing cost can be avoided.

なお、上記実施形態の衝撃吸収部材は、筒状部材3の板状連結部35の外面が接着剤でバンパビーム6に固着されることによって取付固定されるように構成されているが、例えば図6に示すように、筒状部材3の対をなす第1板状保持部31、32の間部分に板状連結部35を排除するように軸方向に延びるスリットを形成し、対をなす第1板状保持部31、32のスリットに沿ったそれぞれの端部に、取付固定部31b、32bを設けるようにしてもよい。   In addition, although the impact-absorbing member of the said embodiment is comprised so that attachment may be carried out when the outer surface of the plate-shaped connection part 35 of the cylindrical member 3 adheres to the bumper beam 6 with an adhesive agent, for example, FIG. As shown in FIG. 1, a slit extending in the axial direction is formed in a portion between the first plate-like holding portions 31 and 32 forming a pair of the cylindrical members 3 so as to exclude the plate-like connecting portion 35, and the first pair is formed. You may make it provide the attachment fixing | fixed part 31b and 32b in each edge part along the slit of the plate-shaped holding | maintenance parts 31 and 32. FIG.

また、上記実施形態の衝撃吸収部材は、それぞれ対をなす第1板状保持部31、32と第2板状保持部33、34が、板状リブ1、2と連結されている側の端部どうしで対向するように構成されているが、例えば図7に示すように逆にして、それぞれ対をなす第1板状保持部31、32と第2板状保持部33、34が板状連結部39と連結されている側の端部どうしで対向するように構成するようにしてもよい。この場合、板状連結部39は、第1板状保持部31、32と第2板状保持部33、34の共有の連結部とされ、その板状連結部39が取付固定部とされる。   Further, the shock absorbing member of the above-described embodiment is an end on the side where the first plate-like holding portions 31 and 32 and the second plate-like holding portions 33 and 34 that make a pair are connected to the plate-like ribs 1 and 2. The first plate-like holding portions 31 and 32 and the second plate-like holding portions 33 and 34 that are paired in the reverse manner, for example, as shown in FIG. You may make it comprise so that the edge part of the side connected with the connection part 39 may oppose. In this case, the plate-like connecting portion 39 is a common connecting portion of the first plate-like holding portions 31 and 32 and the second plate-like holding portions 33 and 34, and the plate-like connecting portion 39 is an attachment fixing portion. .

また、上記実施形態では、歩行者保護用として自動車のバンパに衝撃吸収部材が配設されているが、本発明の衝撃吸収部材は、その他に、例えば乗員の頭部保護用として、ボディーパネル等の車室形成部材とピラーガーニッシュやルーフライニング等の内装部品との間の空間部に配設することができる。   Further, in the above embodiment, the shock absorbing member is disposed on the bumper of the automobile for protecting the pedestrian, but the shock absorbing member of the present invention is also used for protecting the head of an occupant, for example, a body panel or the like. It can arrange | position in the space part between interior parts, such as a vehicle interior formation member and pillar garnish, roof lining.

〔試験〕
本発明の自動車用衝撃吸収部材の衝撃エネルギ吸収性能を調べる試験を行った。本発明に係る衝撃吸収部材として、実施例1及び実施例2を準備した。実施例1は、図8に示すように、一つの板状リブ1aと、板状リブ1aの両端にそれぞれの一端が連結されて板状リブ1aの一面側に配置される一対の第1板状保持部31a、32aと板状リブ1aの両端にそれぞれの一端が連結されて板状リブ1aの他面側に配置される一対の第2板状保持部33a、34aとを有する断面形状が円形の筒状部材3aとからなる。この実施例1は、上記実施形態で用いた樹脂材料と同じ熱可塑性樹脂組成物(未来化成株式会社製、品番「YV−20−2001」)で形成されている。筒状部材3aは、外径が60mmとされ、肉厚が5mmで略一定にされている。また、板状リブ1aは、厚さが1.6mmで略一定にされ、幅寸法W5が45mmとされている。実施例2は、上記実施形態の図1に示すものと同じ構成のものである。
〔test〕
A test for examining the impact energy absorbing performance of the automobile impact absorbing member of the present invention was conducted. Examples 1 and 2 were prepared as shock absorbing members according to the present invention. In the first embodiment, as shown in FIG. 8, one plate-like rib 1a and a pair of first plates arranged on one surface side of the plate-like rib 1a with one end connected to both ends of the plate-like rib 1a. The cross-sectional shape which has a pair of 2nd plate-shaped holding part 33a, 34a by which one end is connected with the both ends of plate-shaped holding part 31a, 32a and the plate-shaped rib 1a, and is arrange | positioned at the other surface side of the plate-shaped rib 1a. It consists of a circular cylindrical member 3a. This Example 1 is formed of the same thermoplastic resin composition as the resin material used in the above embodiment (manufactured by Mirai Kasei Co., Ltd., product number “YV-20-2001”). The cylindrical member 3a has an outer diameter of 60 mm and a wall thickness of 5 mm and is substantially constant. The plate-like rib 1a has a thickness of 1.6 mm and is substantially constant, and the width dimension W5 is 45 mm. Example 2 has the same configuration as that shown in FIG. 1 of the above embodiment.

比較例1として、図9に示すような発泡PPを準備した。この比較例1は、発泡倍率が15倍であり、60mm×60mm×60mmの大きさの方体に形成されている。   As Comparative Example 1, a foamed PP as shown in FIG. 9 was prepared. The comparative example 1 has a foaming ratio of 15 times and is formed in a cuboid having a size of 60 mm × 60 mm × 60 mm.

また、比較例2として、実施例1及び2と同じ樹脂材料で形成された図10に示すようなリブ構造体を準備した。この比較例2は、正方形の平板状の基部61と、基部61に立設された縦方向に延びる平板状の2枚の縦リブ62と横方向に延びる平板状の2枚の横リブ63とが直角に交差して形成された格子状リブ64とからなる。基部61の厚みAは2.5mmであり、縦リブ62の厚みBは1.2〜1.7mmであり、横リブ63の厚みCは1.2〜1.7mmである。隣り合う縦リブ62どうしの芯−芯間距離Dは30mmであり、隣り合う横リブ63どうしの芯−芯間距離Eは30mmである。縦リブ62及び横リブ63の高さFは30mmである。   Moreover, as Comparative Example 2, a rib structure as shown in FIG. 10 formed of the same resin material as in Examples 1 and 2 was prepared. The comparative example 2 includes a square flat base 61, two vertical ribs 62 extending vertically in the base 61, and two horizontal ribs 63 extending horizontally. Is formed of lattice-like ribs 64 that intersect at right angles. The thickness A of the base 61 is 2.5 mm, the thickness B of the longitudinal rib 62 is 1.2 to 1.7 mm, and the thickness C of the lateral rib 63 is 1.2 to 1.7 mm. The core-to-core distance D between the adjacent vertical ribs 62 is 30 mm, and the core-to-core distance E between the adjacent horizontal ribs 63 is 30 mm. The height F of the vertical rib 62 and the horizontal rib 63 is 30 mm.

この試験は、図11に示すように、上下2枚の金属プレート71、72の間に各試験片を挟んだ状態に配置し、上方から上側の金属プレート71に3m/sの速度で衝撃荷重を負荷し、その負荷により加わる荷重値(kN)とその際の試験片の変形率(%)との関係を調べるものであり、その結果は図12に示されている。   In this test, as shown in FIG. 11, each test piece is placed between two upper and lower metal plates 71 and 72, and an impact load is applied to the upper metal plate 71 from above at a speed of 3 m / s. The relationship between the load value (kN) applied by the load and the deformation rate (%) of the test piece at that time is examined, and the result is shown in FIG.

なお、図12において、各試験片のエネルギ吸収量は、それぞれの特性曲線と変形率を示す横軸線とによって囲まれた領域の面積に相当し、その面積が大きい程、エネルギ吸収量が大きいと評価される。   In FIG. 12, the energy absorption amount of each test piece corresponds to the area of the region surrounded by the respective characteristic curve and the horizontal axis indicating the deformation rate. The larger the area, the larger the energy absorption amount. Be evaluated.

図12から明らかなように、比較例1の場合には、荷重負荷初期の段階で、荷重値がやや急激に小さく立ち上がった後、変形率が約60%近くになるまで荷重値が緩やかに上昇し、その後、変形率が約60%に達した以降荷重値が急激に上昇している。この比較例1の場合には、変形率が約3〜60%となる範囲で、荷重値は緩やかに上昇しており、荷重のそれほど大きくない前半部分では大きな衝撃エネルギ吸収量が得られず、全体として衝撃エネルギ吸収効率はまだまだ改善の余地があることが解る。また、比較例1の場合にも、変形率が65%程度のときに潰れ切りとなっていることから、スペース効率は良好とは言えない。   As is apparent from FIG. 12, in the case of Comparative Example 1, the load value rises gradually until the deformation rate approaches about 60% after the load value rises slightly abruptly at the initial stage of load application. Thereafter, after the deformation rate reaches about 60%, the load value increases rapidly. In the case of this comparative example 1, the load value gradually increases in the range where the deformation rate is about 3 to 60%, and a large impact energy absorption amount cannot be obtained in the first half portion where the load is not so large. It can be seen that there is still room for improvement in the impact energy absorption efficiency as a whole. Also, in the case of Comparative Example 1, the space efficiency cannot be said to be good because it is crushed when the deformation rate is about 65%.

また、比較例2の場合には、荷重負荷初期の段階で、荷重値が急激に大きく立ち上がった後、急激に大きく下降し、その後、変形率が約50%になるまで荷重値がやや大きく波打つようにして上昇し、その後、変形率が約55%付近から荷重値が急激に上昇している。この比較例2の場合には、変形率が約5〜30%となる範囲で荷重値が大きく落ち込んでいるので、この範囲で衝撃エネルギを充分に吸収することができず、衝撃エネルギ吸収効率は良くない。また、変形率が55%程度のときに潰れ切りとなっていることから、スペース効率も良くない。   Further, in the case of Comparative Example 2, the load value rises sharply at the initial stage of load application, then drops sharply, and then the load value undulates until the deformation rate reaches about 50%. After that, the load value increases rapidly from around 55% of the deformation rate. In the case of this comparative example 2, since the load value is greatly reduced in a range where the deformation rate is about 5 to 30%, the impact energy cannot be sufficiently absorbed in this range, and the impact energy absorption efficiency is Not good. Further, since the deformation rate is about 55%, the space efficiency is not good.

これに対して、実施例1の場合には、荷重負荷初期の段階で、変形率が30%を越える程度まで荷重値が立ち上がった後、変形率が約80%になるまで荷重値が殆ど変動することなく横這い状態となり、その後、荷重値が急激に大きく上昇している。この実施例1の場合には、変形率が約30〜80%となる広い範囲で、荷重値が変動することなく高い状態を維持していることから、比較例1及び2に比べて充分に大きい衝撃エネルギ吸収量が得られることが解る。このように広い範囲で荷重値が一定状態を維持しているのは、板状リブ2aの引張変形により衝撃エネルギを吸収するからである。変形率が80%程度のときに潰れ切りとなって潰れ残りが小さいのは、板状リブ1a、筒状部材3aが荷重入力方向に折りたたまれることがないからである。   On the other hand, in the case of Example 1, after the load value rises to the extent that the deformation rate exceeds 30% at the initial stage of load application, the load value almost fluctuates until the deformation rate reaches about 80%. The load value has risen sharply after that. In the case of this Example 1, since the load value remains high without fluctuation in a wide range where the deformation rate is about 30 to 80%, it is sufficiently compared with Comparative Examples 1 and 2. It can be seen that a large impact energy absorption amount can be obtained. The reason why the load value is kept constant in such a wide range is that the impact energy is absorbed by the tensile deformation of the plate-like rib 2a. The reason why the crushing and the remaining crushing are small when the deformation rate is about 80% is that the plate-like rib 1a and the cylindrical member 3a are not folded in the load input direction.

また、実施例2の場合には、実施例1と略同様の傾向を示す特性曲線となるが、荷重負荷初期の段階での荷重値の立ち上がりが実施例1よりも急激になり、変形率が約20〜80%となる範囲で一定の高い状態を維持している。したがって、実施例2の方が実施例1よりも大きな衝撃エネルギ吸収量を得られることが解る。   Further, in the case of Example 2, the characteristic curve shows a tendency similar to that of Example 1, but the rise of the load value at the initial stage of the load load becomes sharper than that of Example 1, and the deformation rate is increased. A constant high state is maintained in a range of about 20 to 80%. Therefore, it can be seen that the second embodiment can obtain a larger amount of shock energy absorption than the first embodiment.

以上のことから、実施例1及び2のように、板状リブ1a、1、2の引張変形により衝撃エネルギを吸収するようにすれば、低い衝撃荷重が入力した際に良好な衝撃エネルギ吸収機能を発揮させるようにすることができ、人身の保護用に極めて好適な自動車用衝撃吸収部材が得られることが解った。   From the above, if the impact energy is absorbed by the tensile deformation of the plate-like ribs 1a, 1 and 2 as in the first and second embodiments, a good impact energy absorbing function can be obtained when a low impact load is input. It has been found that a shock absorbing member for automobiles that is extremely suitable for personal protection can be obtained.

参考例1
図13は参考例1に係る自動車用衝撃吸収部材の軸直角方向の断面図であり、図14はその自動車用衝撃吸収部材の平面図である。
[ Reference Example 1 ]
13 is a cross-sectional view in the direction perpendicular to the axis of the automobile impact absorbing member according to Reference Example 1 , and FIG. 14 is a plan view of the automobile impact absorbing member.

本参考例の衝撃吸収部材は、図13及び図14に示すように、樹脂材料で長尺板状に形成された一つの板状リブ4と、一対の第1板状保持部51、52と一対の第2板状保持部53、54と第1及び第2板状連結部55、56とからなり断面形状が六角形の筒状に形成されて板状リブ4を内部に保持する筒状部材5と、から構成されている。 As shown in FIGS. 13 and 14, the shock absorbing member of the present reference example includes one plate-like rib 4 formed in a long plate shape with a resin material, and a pair of first plate-like holding portions 51 and 52. A cylindrical shape comprising a pair of second plate-like holding portions 53, 54 and first and second plate-like connecting portions 55, 56, which is formed in a hexagonal cylindrical shape and holds the plate-like rib 4 inside. And a member 5.

板状リブ4は、熱可塑性樹脂組成物(未来化成株式会社製、品番「YV−20−2001」)により、略一定の肉厚1mmで、幅寸法W5が35mm、長さ寸法L1が300mmとされた平板状に形成されている。これにより、板状リブ4は、引張破断伸びが100%以上、引張降伏応力が15Mpa以上とされている。   The plate-like rib 4 is made of a thermoplastic resin composition (manufactured by Mirai Kasei Co., Ltd., product number “YV-20-2001”) with a substantially constant thickness of 1 mm, a width dimension W5 of 35 mm, and a length dimension L1 of 300 mm. It is formed in a flat plate shape. Thereby, the plate-like rib 4 has a tensile elongation at break of 100% or more and a tensile yield stress of 15 Mpa or more.

筒状部材5は、略一定の肉厚0.8mmの鉄系金属板により、板状リブ4を間に挟んで軸対称となるように二つに分割形成されており、板状リブ4の一面側(図13において上面側)に配置される半筒部材5aと、板状リブ4の他面側(図13において上面側)に配置される半筒部材5bとからなる。一方の半筒部材5aは、板状リブ4の幅方向両端にそれぞれの一端が連結固定された一対の第1板状保持部51、52と、一対の第1板状保持部51、52の他端どうしを連結する第1板状連結部55とを有する。一対の第1板状保持部51、52は、それぞれ外側へ屈曲された一端部が板状リブ4の一面側の幅方向両端部に接着剤で接着固定されており、それぞれの一端部から板状リブ4と直角方向へ遠ざかるに連れてそれぞれの他端どうしが接近するように傾斜している。また、第1板状連結部55は、板状リブ4と略平行に配置されている。   The cylindrical member 5 is divided and formed in two so as to be axially symmetric with a plate-like rib 4 sandwiched therebetween by a substantially constant 0.8 mm thick iron-based metal plate. It consists of a semi-cylindrical member 5a arranged on one surface side (upper surface side in FIG. 13) and a semi-cylindrical member 5b arranged on the other surface side (upper surface side in FIG. 13) of the plate-like rib 4. One half-cylinder member 5a includes a pair of first plate-like holding portions 51, 52 each having one end connected and fixed to both ends in the width direction of the plate-like rib 4, and a pair of first plate-like holding portions 51, 52. It has the 1st plate-shaped connection part 55 which connects other end. One end of each of the pair of first plate-like holding portions 51 and 52 is bent and fixed to the both ends in the width direction on the one surface side of the plate-like rib 4 with an adhesive. Each of the other ends is inclined so as to approach each other as it goes away from the rib 4 in the direction perpendicular to the shape. Further, the first plate-like connecting portion 55 is disposed substantially parallel to the plate-like rib 4.

また、他方の半筒部材5bは、板状リブ4の幅方向両端にそれぞれの一端が連結固定された一対の第2板状保持部53、54と、一対の第2板状保持部53、54の他端どうしを連結する第2板状連結部56とを有する。一対の第2板状保持部53、54は、それぞれ外側へ屈曲された一端部が板状リブ4の他面側の幅方向両端部に接着剤で接着固定されており、それぞれの一端部から板状リブ4と直角方向へ遠ざかるに連れてそれぞれの他端どうしが接近するように傾斜している。また、第2板状連結部56は、板状リブ4と略平行に配置されている。   The other half-cylinder member 5b includes a pair of second plate-like holding portions 53, 54 each having one end connected and fixed to both ends of the plate-like rib 4 in the width direction, and a pair of second plate-like holding portions 53, And a second plate-like connecting portion 56 for connecting the other ends of 54. One end of each of the pair of second plate-like holding portions 53 and 54 is bent and fixed to the both ends in the width direction on the other surface side of the plate-like rib 4 with an adhesive. Each plate is inclined so that the other ends approach each other as it moves away from the plate rib 4 in the direction perpendicular to the plate-like rib 4. Further, the second plate-like connecting portion 56 is disposed substantially parallel to the plate-like rib 4.

本参考例においては、図13に示すように、各第1及び第2板状保持部51〜54の幅寸法W6は12mmとされ、各第1及び第2板状連結部55、56の幅寸法W7も12mmとされている。また、筒状部材5は、幅寸法W8が32mm、厚さ寸法W9が約22mmとされており、実施形態1の筒状部材3に比べて小型化されている。なお、筒状部材5の長さ寸法L1は、図14に示すように、板状リブ4と同じ300mmである。 In this reference example , as shown in FIG. 13, the width dimension W6 of each of the first and second plate-like holding portions 51 to 54 is 12 mm, and the width of each of the first and second plate-like connecting portions 55 and 56 is set. The dimension W7 is also 12 mm. Further, the cylindrical member 5 has a width dimension W8 of 32 mm and a thickness dimension W9 of about 22 mm, and is smaller than the cylindrical member 3 of the first embodiment. The length L1 of the cylindrical member 5 is 300 mm, which is the same as that of the plate-like rib 4, as shown in FIG.

以上のように構成された本参考例の自動車用衝撃吸収部材は、例えば図15に示すように、自動車のルーフサイドに取付けられ、乗員保護用として使用される。即ち、この衝撃吸収部材は、ルーフパネル81の周縁部に位置するルーフサイドアウタパネル82の内側に固着されたルーフサイドインナパネル83の内面に対して、取付固定部となる第1板状連結部55の外面が接着剤で固着されることにより取付けられており、ルーフサイドインナパネル83とこれの内側に取付けられるルーフヘッドライニング84との間に配設されている。この場合、衝撃吸収部材は、板状リブ4が衝撃荷重入力方向(主として図15における矢印y方向)に対して略直交する方向に延びるように配置された状態に取付けられている。 The automobile impact absorbing member of the present reference example configured as described above is attached to the roof side of an automobile and used for occupant protection, for example, as shown in FIG. That is, this shock absorbing member is attached to the inner surface of the roof side inner panel 83 fixed to the inner side of the roof side outer panel 82 located at the peripheral edge of the roof panel 81, and the first plate-like connecting portion 55 serving as an attachment fixing portion. The outer surface is fixed by an adhesive, and is disposed between the roof side inner panel 83 and the roof head lining 84 attached to the inside thereof. In this case, the shock absorbing member is attached in a state where the plate-like rib 4 is arranged so as to extend in a direction substantially orthogonal to the shock load input direction (mainly the arrow y direction in FIG. 15).

このように衝撃吸収部材が取付けられた自動車が他の自動車等に衝突した際に、乗員の頭部がルーフヘッドライニング84に衝突して比較的低い衝撃荷重が入力すると、ルーフヘッドライニング84の弾性変形に伴う変位によって、その衝撃荷重が衝撃吸収部材に入力し、衝撃吸収部材はルーフヘッドライニング84とルーフサイドインナパネル83により衝撃荷重入力方向(主として図15における矢印y方向)に圧縮される。これにより、衝撃吸収部材は、衝撃荷重入力方向において対向する両板状連結部55、56が接近するように変形する。このとき、、第1板状保持部51、52の板状リブ4側の端部どうし、及び第2板状保持部53、54の板状リブ4側の端部どうしが互いに遠ざかるように変位することにより、板状リブ4の両端が遠ざかるように引っ張られて板状リブ4が引張変形させられ、この板状リブ4の引張変形によって衝撃エネルギが効率良く吸収される。   When a vehicle with a shock absorbing member attached thereto collides with another vehicle or the like, when the head of the occupant collides with the roof head lining 84 and a relatively low impact load is input, the elasticity of the roof head lining 84 is obtained. Due to the displacement accompanying the deformation, the impact load is input to the impact absorbing member, and the impact absorbing member is compressed by the roof head lining 84 and the roof side inner panel 83 in the impact load input direction (mainly the arrow y direction in FIG. 15). Thereby, the shock absorbing member is deformed so that the two plate-like connecting portions 55 and 56 facing each other in the shock load input direction approach each other. At this time, the end portions on the plate-like rib 4 side of the first plate-like holding portions 51 and 52 and the end portions on the plate-like rib 4 side of the second plate-like holding portions 53 and 54 are displaced away from each other. By doing so, the both ends of the plate-like rib 4 are pulled away and the plate-like rib 4 is pulled and deformed, and the impact energy is efficiently absorbed by the tensile deformation of the plate-like rib 4.

このように、樹脂製の板状リブ4の良好な伸び特性や引張特性を利用して衝撃エネルギが吸収されることから、初期の衝撃荷重が急激に大きくならず、しかも板状リブ4の引張変形が継続的に行われるので初期の衝撃荷重の低下が極めて少ないため、極めて効率良く衝撃エネルギが吸収される。また、本参考例の衝撃吸収部材では、各第1及び第2板状保持部51〜54及び板状リブ4は、衝撃荷重入力方向に折り畳まれることがないので潰れ残りが小さくなるため、限られた設置スペースにおいても大きな衝撃エネルギ吸収量の確保が可能となる。よって、ルーフヘッドライニング84に衝突した乗員に及ぼされるダメージが大幅に軽減され、乗員の保護が確実になされる。 As described above, since the impact energy is absorbed by utilizing the good elongation characteristics and tensile characteristics of the resin plate-like ribs 4, the initial impact load does not increase rapidly, and the tension of the plate-like ribs 4 is increased. Since the deformation is continuously performed, the initial impact load is hardly reduced, so that the impact energy is absorbed very efficiently. Further, in the shock absorbing member of this reference example , each of the first and second plate-like holding portions 51 to 54 and the plate-like rib 4 is not folded in the direction of impact load input, so that the remaining crushing is small. A large amount of impact energy absorption can be ensured even in the installed space. Therefore, damage to the occupant colliding with the roof head lining 84 is greatly reduced, and the occupant is reliably protected.

以上のように、本参考例の衝撃吸収部材は、衝撃荷重入力方向に対して略直交する方向に延びるように配置される樹脂製の板状リブ4と、板状リブ4の両端にそれぞれの一端が連結されて衝撃荷重入力時に板状リブ4を引張変形させる第1及び第2板状保持部51〜54を有する金属製の筒状部材5と、から構成されているため、比較的低い衝撃荷重が負荷された際に良好な衝撃エネルギ吸収機能を発揮することができ、乗員等の人身の保護を確実に且つ有利になすことができる。 As described above, the shock absorbing member of the present reference example has the resin-made plate-like ribs 4 arranged so as to extend in a direction substantially orthogonal to the shock load input direction, and the both ends of the plate-like ribs 4. It is relatively low because it is composed of a metal cylindrical member 5 having first and second plate-like holding portions 51 to 54 that are connected at one end and tensilely deform the plate-like rib 4 when an impact load is input. A good impact energy absorption function can be exhibited when an impact load is applied, and the protection of the passenger and other personnel can be ensured and advantageous.

特に、本参考例の衝撃吸収部材は、金属製の筒状部材5が採用されていることにより、樹脂製の筒状部材3が採用されている実施形態1のものに比べて、筒状部材5(特に、第1及び第2板状保持部51〜54)の剛性や強度を高めることができるため、それらの肉厚を薄くすることができ小型化することができる。また、筒状部材5(特に、第1及び第2板状保持部51〜54)の強度が充分に高いので、衝撃荷重入力時に引張変形させられる板状リブ4の肉厚を厚くして、対応可能な衝撃荷重を大きくすることができるため、対応可能な衝撃荷重の範囲を広くすることができる。 In particular, the shock absorbing member of the present reference example has a cylindrical member as compared with the first embodiment in which the resin-made cylindrical member 3 is employed because the metallic cylindrical member 5 is employed. 5 (particularly, the first and second plate-like holding portions 51 to 54) can be increased in rigidity and strength, and therefore, their thickness can be reduced and the size can be reduced. Further, since the strength of the cylindrical member 5 (particularly, the first and second plate-like holding portions 51 to 54) is sufficiently high, the thickness of the plate-like rib 4 that is pulled and deformed when an impact load is input is increased, Since the impact load that can be handled can be increased, the range of impact load that can be handled can be widened.

なお、上記参考例において、筒状部材5の各第1及び第2板状保持部51〜54の一端は、板状リブ4の幅方向両端部に接着剤で接着固定されているが、各第1及び第2板状保持部51〜54の一端と板状リブ4との連結固定方法として、例えば、各第1及び第2板状保持部51〜54の一端部をかしめることによって板状リブ4の端部に連結固定する方法も採用することができる。 In the above reference example , one end of each of the first and second plate-like holding portions 51 to 54 of the tubular member 5 is bonded and fixed to the both ends in the width direction of the plate-like rib 4 with each adhesive. As a method for connecting and fixing one end of the first and second plate-like holding portions 51 to 54 and the plate-like rib 4, for example, the plate is obtained by caulking one end portion of each of the first and second plate-like holding portions 51 to 54. A method of connecting and fixing to the end of the rib 4 can also be employed.

本発明の実施形態1に係る自動車用衝撃吸収部材の軸直角方向の断面図である。It is sectional drawing of the axis orthogonal direction of the impact-absorbing member for motor vehicles concerning Embodiment 1 of this invention. 本発明の実施形態1に係る自動車用衝撃吸収部材の斜視図である。1 is a perspective view of an automobile impact absorbing member according to Embodiment 1 of the present invention. 本発明の実施形態1に係る自動車用衝撃吸収部材をバンパに取付けた状態を示す平面図である。It is a top view which shows the state which attached the shock absorber for motor vehicles concerning Embodiment 1 of this invention to the bumper. 図3のIV−IV線矢視断面図である。FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. 3. (a)〜(e)本発明の実施形態1に係る自動車用衝撃吸収部材が衝撃荷重入力によって変形する様子を段階的に示す説明図である。(A)-(e) It is explanatory drawing which shows a mode that the impact-absorbing member for motor vehicles concerning Embodiment 1 of this invention deform | transforms by impact load input. 本発明の他の実施形態に係る自動車用衝撃吸収部材の軸直角方向の断面図である。It is sectional drawing of the axis orthogonal direction of the impact-absorbing member for motor vehicles which concerns on other embodiment of this invention. 本発明のその他の実施形態に係る自動車用衝撃吸収部材の軸直角方向の断面図である。It is sectional drawing of the axis orthogonal direction of the impact-absorbing member for motor vehicles which concerns on other embodiment of this invention. 試験で使用した実施例1の形状及び寸法を示す説明図である。It is explanatory drawing which shows the shape and dimension of Example 1 which were used by the test. 試験で使用した比較例1の形状を示す説明図である。It is explanatory drawing which shows the shape of the comparative example 1 used by the test. 試験で使用した比較例2の形状及び寸法を示す説明図である。It is explanatory drawing which shows the shape and dimension of the comparative example 2 used by the test. (a)(b)試験方法を示す説明図である。(A) (b) It is explanatory drawing which shows a test method. 試験結果の荷重変形曲線を示すグラフである。It is a graph which shows the load deformation curve of a test result. 本発明の実施形態2に係る自動車用衝撃吸収部材の軸直角方向の断面図であって図14のXIII−XIII線矢視断面図である。It is sectional drawing of the axis-perpendicular direction of the impact-absorbing member for motor vehicles which concerns on Embodiment 2 of this invention, Comprising: It is XIII-XIII sectional view taken on the line of FIG. 参考例1に係る自動車用衝撃吸収部材の平面図である。 5 is a plan view of an automobile impact absorbing member according to Reference Example 1. FIG. 参考例1に係る自動車用衝撃吸収部材をルーフサイドに取付けた状態を示す断面図である。It is sectional drawing which shows the state which attached the impact-absorbing member for motor vehicles concerning the reference example 1 to the roof side.

符号の説明Explanation of symbols

1、2、1a、4…板状リブ 3、3a、5…筒状部材 5a、5b…半筒部材 31、32、31a、32a、51、52…第1板状保持部
33、34、53、54…第2板状保持部 31b、32b…取付固定部
35〜39…板状連結部 55…第1板状連結部 56…第2板状連結部
61…基部 62…縦リブ 63…横リブ 64…格子状リブ
71、72…金属プレート 81…ルーフパネル
82…ルーフサイドアウタパネル 83…ルーフサイドインナパネル
84…ルーフヘッドライニング
1, 2, 1a, 4 ... plate-like ribs 3, 3a, 5 ... cylindrical members 5a, 5b ... half-cylinder members 31, 32, 31a, 32a, 51, 52 ... first plate-like holding portions 33, 34, 53 54 ... 2nd plate-shaped holding | maintenance part 31b, 32b ... Attachment fixing | fixed part 35-39 ... Plate-shaped connection part 55 ... 1st plate-shaped connection part 56 ... 2nd plate-shaped connection part 61 ... Base 62 ... Vertical rib 63 ... Horizontal Ribs 64: Grid-shaped ribs 71, 72 ... Metal plates 81 ... Roof panels 82 ... Roof side outer panels 83 ... Roof side inner panels 84 ... Roof head linings

Claims (10)

衝撃荷重入力方向に対して略直交する方向に延びるように配置される樹脂製の板状リブと、
該板状リブの両端にそれぞれの一端が連結されるとともにそれぞれの該一端から前記板状リブと直角方向へ遠ざかるに連れてそれぞれの他端が互いに接近するように傾斜して配置され、衝撃荷重入力時に前記板状リブを引張変形させる一対の板状保持部と、を備え
該板状保持部は、曲げ弾性率が0.8Gpa以上の樹脂材料で形成されているとともに、該板状保持部の肉厚は、前記板状リブの肉厚よりも厚くされていることを特徴とする自動車用衝撃吸収部材。
Resinous plate-like ribs arranged so as to extend in a direction substantially orthogonal to the impact load input direction;
One end is connected to both ends of the plate-shaped rib, and the other ends are inclined so that they approach each other as they move away from the plate-shaped rib at right angles to each other , A pair of plate-like holding portions that pull and deform the plate-like rib at the time of input , and
The plate-like holding part is made of a resin material having a flexural modulus of 0.8 Gpa or more, and the thickness of the plate-like holding part is made thicker than the thickness of the plate-like rib. A shock-absorbing member for automobiles that is characterized.
略平行に配置された二つの前記板状リブと、一方の前記板状リブの両端にそれぞれの一端が連結される一対の第1板状保持部と他方の前記板状リブの両端にそれぞれの一端が連結される一対の第2板状保持部とを有する筒状部材と、から構成されている請求項1に記載の自動車用衝撃吸収部材。   Two plate-like ribs arranged substantially in parallel, one pair of first plate-like holding portions connected to both ends of the one plate-like rib, and two ends of the other plate-like rib, respectively. The impact-absorbing member for automobiles according to claim 1, comprising a cylindrical member having a pair of second plate-like holding portions to which one ends are connected. 前記筒状部材は、周方向において隣り合う各前記板状保持部の端部どうしを連結する四つの板状連結部を有する請求項2に記載の自動車用衝撃吸収部材。   The automobile impact absorbing member according to claim 2, wherein the cylindrical member has four plate-like connecting portions that connect ends of the plate-like holding portions adjacent to each other in the circumferential direction. 一つの前記板状リブと、前記板状リブの両端にそれぞれの一端が連結されて前記板状リブの一面側に配置される一対の第1板状保持部と前記板状リブの両端にそれぞれの一端が連結されて前記板状リブの他面側に配置される一対の第2板状保持部とを有する筒状部材と、から構成されている請求項1に記載の自動車用衝撃吸収部材。   One plate-like rib, a pair of first plate-like holding portions disposed on one surface side of the plate-like rib, with one end connected to both ends of the plate-like rib, and both ends of the plate-like rib. An automotive shock absorbing member according to claim 1, further comprising: a cylindrical member having a pair of second plate-shaped holding portions that are connected to each other and disposed on the other surface side of the plate-shaped rib. . 前記筒状部材は、一対の前記第1板状保持部の他端どうし及び一対の前記第2板状保持部の他端どうしを連結する二つの板状連結部を有する請求項4に記載の自動車用衝撃吸収部材。   The said cylindrical member has two plate-shaped connection parts which connect the other ends of a pair of said 1st plate-shaped holding part and the other ends of a pair of said 2nd plate-shaped holding part. Shock absorbing member for automobiles. 前記筒状部材は、一対の前記第1板状保持部の他端どうしの間又は一対の前記第2板状保持部の他端どうしの間に形成された軸方向に延びるスリットを有し、該スリットの両側にはそれぞれ取付固定部が設けられている請求項2〜5のいずれか一項に記載の自動車用衝撃吸収部材。 The cylindrical member has a slit extending in the axial direction formed between the other ends of the pair of first plate-shaped holding portions or between the other ends of the pair of second plate-shaped holding portions, The automobile impact absorbing member according to any one of claims 2 to 5, wherein attachment fixing portions are provided on both sides of the slit. 前記筒状部材の肉厚は、前記板状リブの肉厚よりも厚くされている請求項2〜6のいずれか一項に記載の自動車用衝撃吸収部材。 The impact-absorbing member for automobile according to any one of claims 2 to 6 , wherein a thickness of the tubular member is thicker than a thickness of the plate-like rib. 前記板状保持部の肉厚は、中央部が両端部よりも厚くされている請求項1〜7のいずれか一項に記載の自動車用衝撃吸収部材。 The thickness of the said plate-shaped holding | maintenance part is an impact-absorbing member for motor vehicles as described in any one of Claims 1-7 in which the center part is thicker than both ends. 歩行者保護用としてバンパビームの前面又は後面に取付けられている請求項1〜8のいずれか一項に記載の自動車用衝撃吸収部材。 The automobile impact absorbing member according to any one of claims 1 to 8, which is attached to a front surface or a rear surface of a bumper beam for protecting a pedestrian. 乗員保護用としてルーフサイド又はピラーに取付けられている請求項1〜8のいずれか一項に記載の自動車用衝撃吸収部材。 The impact-absorbing member for automobiles according to any one of claims 1 to 8, which is attached to a roof side or a pillar for protecting an occupant.
JP2004359863A 2004-07-29 2004-12-13 Shock absorber for automobile Expired - Fee Related JP4457302B2 (en)

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JP4759497B2 (en) * 2006-11-29 2011-08-31 東海ゴム工業株式会社 Shock absorber for automobile
JP2009029296A (en) 2007-07-27 2009-02-12 Tokai Rubber Ind Ltd Impact absorption member
JP5104347B2 (en) * 2008-01-30 2012-12-19 株式会社デンソー Pedestrian collision detection device
JP5147466B2 (en) * 2008-03-07 2013-02-20 株式会社日立ハイテクインスツルメンツ Electronic component mounting device
US20090256370A1 (en) * 2008-04-09 2009-10-15 E. I. Du Pont De Nemours And Company Bumper energy absorbers for pedestrian safety
KR100974709B1 (en) 2008-12-02 2010-08-06 현대자동차주식회사 Roof side part structure of vehicle
JP5290008B2 (en) * 2009-03-10 2013-09-18 東海ゴム工業株式会社 Shock absorbing member for vehicle
BR112017007230A2 (en) * 2014-10-17 2017-12-12 Nippon Steel & Sumitomo Metal Corp impact absorbing element
JP7450997B1 (en) 2023-07-03 2024-03-18 NatureArchitects株式会社 Shock absorbing structure and bumper core material

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