JP3304881B2 - Car bumper support structure - Google Patents
Car bumper support structureInfo
- Publication number
- JP3304881B2 JP3304881B2 JP14857698A JP14857698A JP3304881B2 JP 3304881 B2 JP3304881 B2 JP 3304881B2 JP 14857698 A JP14857698 A JP 14857698A JP 14857698 A JP14857698 A JP 14857698A JP 3304881 B2 JP3304881 B2 JP 3304881B2
- Authority
- JP
- Japan
- Prior art keywords
- foam material
- bumper
- reinforcement
- support structure
- foam
- 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
- Body Structure For Vehicles (AREA)
Description
【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION
【０００１】[0001]
【発明の属する技術分野】本発明は自動車、特に、乗用
車のバンパの支持構造に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automobile, and more particularly to a bumper support structure for a passenger car.
【０００２】[0002]
【従来の技術】乗用車のバンパは樹脂で作られ、リィイ
ンフォースによって支持される。乗用車の後方の端部に
配置されるバンパの場合、リィインフォースは所定の強
度、つまり、時速５マイル（８km/h）で走行している乗
用車が外径φ７in（φ１７０mm）のポールに衝突したと
き、リィインフォースに生ずる凹みが一定の大きさの範
囲に留まる強度とすることが要求される。2. Description of the Related Art Passenger car bumpers are made of resin and are supported by a reinforcement. In the case of a bumper located at the rear end of a passenger car, the reinforcement has a predetermined strength, that is, a passenger car traveling at a speed of 5 miles per hour (8 km / h) collides with a pole having an outer diameter of φ7 in (φ170 mm). At this time, it is required that the dents formed in the reinforcement have such a strength that the dents remain within a certain size range.
【０００３】[0003]
【発明が解決しようとする課題】前記要求を満たすと共
に軽量化を図るため、上方の筒部と下方の筒部とを有す
るようにリィインフォースを形成することがある。この
リィインフォースについて試験を繰り返したところ、リ
ィインフォースの中央部付近では、所定の荷重に達する
前にリィインフォースが座屈するおそれがあることが判
明した。ひとたび座屈が起こると、変位量だけが大きく
なり、効率的なエネルギ吸収ができなくなるため、座屈
を防ぐ必要がある。In order to satisfy the above demands and to reduce the weight, a reinforcement is sometimes formed to have an upper cylindrical portion and a lower cylindrical portion. When the test was repeated for this reinforce, it was found that the reinforce might buckle near the center of the reinforce before reaching a predetermined load. Once buckling occurs, only the amount of displacement increases, making it impossible to efficiently absorb energy. Therefore, it is necessary to prevent buckling.
【０００４】リィインフォースの厚みを大きくすること
により座屈を防ぐことができるが、厚みを大きくするこ
とは軽量化の要請に反することとなり、好ましくない。[0004] Buckling can be prevented by increasing the thickness of the reinforcement, but increasing the thickness is against the demand for weight reduction and is not preferred.
【０００５】本発明は、軽量化を図りつつリィインフォ
ースの座屈を防止できる、自動車のバンパの支持構造を
提供する。The present invention provides a structure for supporting a bumper of an automobile, which can reduce the weight and prevent buckling of the reinforcement.
【０００６】[0006]
【課題を解決するための手段】本発明は、自動車の前方
の端部又は後方の端部に配置されるバンパを支持する構
造であって、前記バンパを取り付けるリィインフォース
と、発泡材とを備える。前記リィインフォースは上方の
筒部と下方の筒部とを有するように形成され、車体の幅
方向へ伸びる。前記発泡材は、前記リィインフォースの
上方の筒部及び下方の筒部内にそれぞれ充填される。そ
して、前記上方の筒部内の発泡材は、車体の前後方向へ
伸びる中心線を含む仮想鉛直面をはさんで車体の幅方向
の両側へ所定長さ伸び、前記下方の筒部内の発泡材は、
前記仮想鉛直面をはさんで車体の幅方向の両側へ前記上
方の発泡材とは異なる長さ伸びている。According to the present invention, there is provided a structure for supporting a bumper disposed at a front end or a rear end of an automobile, comprising a reinforcement for attaching the bumper and a foam material. Prepare. The reinforce is formed to have an upper tubular portion and a lower tubular portion, and extends in the width direction of the vehicle body. The foam material is filled in the upper tube portion and the lower tube portion of the reinforcement, respectively. The foam material in the upper cylinder portion extends a predetermined length to both sides in the width direction of the vehicle body across a virtual vertical plane including a center line extending in the front-rear direction of the vehicle body, and the foam material in the lower cylinder portion is ,
A length different from that of the foam material above extends to both sides in the width direction of the vehicle body with the virtual vertical plane interposed therebetween.
【０００７】[0007]
【発明の作用及び効果】リィインフォースの筒部に充填
された発泡材は、前記仮想鉛直面に沿う前後方向の荷重
に対する強度を向上させるところ、リィインフォースの
上方の筒部に充填された発泡材と下方の筒部に充填され
た発泡材とが異なる長さであるため、リィインフォース
には発泡材が上下方向で重なって存在する部分と、上方
の発泡材のみ又は下方の発泡材のみが存在する部分と、
発泡材が全く存在しない部分とが生じ、リィインフォー
スは前記荷重に対して３つの強度範囲を持つこととな
る。The foam material filled in the cylindrical portion of the reinforce improves the strength against a load in the front-rear direction along the virtual vertical plane, and is filled in the cylindrical portion above the reinforce. Since the foam material and the foam material filled in the lower cylindrical portion have different lengths, the reinforcement has a portion where the foam material overlaps in the vertical direction, and only the upper foam material or the lower foam material. Only where there is,
There is a portion where no foam material is present, and the reinforcement has three strength ranges for the load.
【０００８】リィインフォースが前後方向の荷重に対し
て３つの強度範囲を持つため、リィインフォースの強度
差が小さくなる。その結果、荷重がバンパに加わったと
き、リィインフォースに働く応力を分散させることがで
き、応力集中が起こりにくくなる。これにより、リィイ
ンフォースの座屈の発生を防ぐことができる。Since the reinforcement has three strength ranges with respect to the load in the front-rear direction, the strength difference of the reinforcement becomes small. As a result, when a load is applied to the bumper, the stress acting on the reinforce can be dispersed, and stress concentration hardly occurs. As a result, buckling of the reinforcement can be prevented.
【０００９】リィインフォースが座屈することなく変形
するため、変位を長くすることなく大きな荷重を吸収で
き、効率的なエネルギ吸収を図ることができる。Since the reinforcement is deformed without buckling, a large load can be absorbed without increasing the displacement, and efficient energy absorption can be achieved.
【００１０】発泡材は軽量であるため、バンパの支持構
造を軽量化することができる。また、発泡材をリィイン
フォースの筒部に充填するだけでよいことから、簡単に
実施でき、生産性を向上できる。また、既存のリィイン
フォースに孔を開けて発泡材を充填することにより、既
存のバンパの支持構造を効率的にエネルギ吸収できる支
持構造に簡単に改造することができる。[0010] Since the foam material is lightweight, the support structure of the bumper can be reduced in weight. Further, since it is only necessary to fill the tubular portion of the reinforcement with the foam material, the process can be easily performed, and the productivity can be improved. In addition, by forming a hole in the existing reinforcement and filling the foam material, the existing bumper support structure can be easily remodeled into a support structure capable of efficiently absorbing energy.
【００１１】[0011]
【発明の実施の形態】バンパの支持構造は、斜視状態を
示す図１と、断面状態を示す図２と、自動車の後部の斜
視状態を示す図３とを参照すると、自動車１０の前方の
端部又は後方の端部に配置されるバンパ１２を支持する
ものであって、リィインフォース１４と、発泡材１６，
１８とを備える。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIG. 1 showing a perspective view, FIG. 2 showing a cross-sectional view, and FIG. For supporting a bumper 12 disposed at a rear end or a rear end thereof.
18.
【００１２】図示の実施例では、バンパ１２は自動車１
０の後方の端部に配置されている。バンパ１２はそれ自
体公知のように、硬質の樹脂で所定の形状に成形された
ものである。In the illustrated embodiment, the bumper 12 is
0 at the rear end. As is known per se, the bumper 12 is formed of a hard resin into a predetermined shape.
【００１３】リィインフォース１４は上方の筒部２０と
下方の筒部２２とを有するように鋼板を折り曲げて形成
され、車体の幅方向Ｗへ伸びている。リィインフォース
１４は、従来と同様に、バンパ１２をボルト（図示せ
ず）によって取り付けて支持する。The reinforcement 14 is formed by bending a steel plate so as to have an upper cylindrical portion 20 and a lower cylindrical portion 22, and extends in the width direction W of the vehicle body. The reinforcement 14 attaches and supports the bumper 12 with bolts (not shown), as in the related art.
【００１４】図示の実施例では、リィインフォース１４
の上方の筒部２０と下方の筒部２２とは、実質的に四角
形の断面形状を呈するように形成され、間隔２１をおい
て上下に位置している。そして、発泡材１６が上方の筒
部２０内に、また発泡材１８が下方の筒部２２内に充填
されている。発泡材１６，１８を筒部２０，２２に充填
するには、各筒部に孔を開けておき、この孔に差し込ん
だガンによって液状の発泡材を筒部内に注入し、発泡さ
せる。発泡材として高密度の発泡ウレタンを使用するこ
とができる。In the illustrated embodiment, the reinforcement 14
The upper cylindrical portion 20 and the lower cylindrical portion 22 are formed so as to have a substantially rectangular cross-sectional shape, and are positioned vertically with an interval 21 therebetween. The foam material 16 is filled in the upper tubular portion 20 and the foam material 18 is filled in the lower tubular portion 22. In order to fill the tubular parts 20 and 22 with the foaming materials 16 and 18, holes are made in each of the tubular parts, and a liquid foaming material is injected into the tubular parts by a gun inserted into these holes and foamed. High-density urethane foam can be used as the foam material.
【００１５】上方の筒部２０内の発泡材１６は、車体の
前後方向へ伸びる中心線を含む仮想鉛直面Ｐをはさんで
車体の幅方向Ｗの両側へ所定長さＷ１伸びており、下方
の筒部２０内の発泡材１８は、仮想鉛直面Ｐをはさんで
車体の幅方向Ｗの両側へ上方の発泡材１６とは異なる長
さＷ２伸びている。発泡材１６，１８は、仮想鉛直面Ｐ
の両側に振り分けて配置することが好ましい。[0015] foam 16 within the upper cylindrical portion 20 extends a predetermined length W 1 to both sides in the width direction W of the vehicle body across the imaginary vertical plane P containing the center line extending in the longitudinal direction of the vehicle body, foam 18 in the lower cylindrical portion 20 extends different lengths W 2 is an upper foam 16 to both sides in the width direction W of the vehicle body across the imaginary vertical plane P. Foam materials 16 and 18 are virtual vertical plane P
It is preferable to distribute and arrange on both sides.
【００１６】図示の実施例では、上方の筒部の発泡材１
６の長さＷ１の方が、下方の筒部の発泡材１８の長さＷ
２より長い。したがって、リィインフォース１４には、
下方の発泡材１８の範囲では上方の発泡材１６と下方の
発泡材１８とが上下方向で重なって存在しており、下方
の発泡材１８の左右で上方の発泡材１６の下方の範囲で
は上方の発泡材１６のみが存在する。そして、上方の発
泡材１６の左右では発泡材が存在しない。発泡材１８の
長さＷ２は、前記ポールに衝突したときの強度を基準と
する場合、120-250mmとすることができ、発泡材１６の
長さＷ１は、発泡材１８の長さの２-４倍とすることが
できる。In the illustrated embodiment, the foam material 1 in the upper tubular portion is used.
6 towards the length W 1 of the length W of the foam 18 of the lower cylindrical portion
Longer than two . Therefore, the reinforcement 14 includes:
In the range of the lower foam material 18, the upper foam material 16 and the lower foam material 18 overlap in the vertical direction, and in the range below the upper foam material 16 on the left and right sides of the lower foam material 18, Only the foam material 16 exists. There is no foam material on the left and right of the foam material 16 above. The length W 2 of the foam material 18 can be 120 to 250 mm based on the strength at the time of collision with the pole, and the length W 1 of the foam material 16 is the length of the foam material 18. It can be 2-4 times.
【００１７】次に、模式的に示した図４を参照して本発
明に係るバンパの支持構造の作用を説明する。リィイン
フォース１４の筒部２０に充填した発泡材１６と、筒部
２２に充填した発泡材１８との長さを前記のように定め
た結果、リィインフォース１４には、発泡材１６，１８
が上下で重なって存在する範囲Ａと、発泡材１６のみが
存在する範囲Ｂと、発泡材が存在しない範囲Ｃとができ
る（同図の（b））。Next, the operation of the bumper support structure according to the present invention will be described with reference to FIG. 4 schematically shown. As a result of determining the length of the foam material 16 filled in the cylindrical portion 20 of the reinforce 14 and the foam material 18 filled in the cylindrical portion 22 as described above, the foam materials 16 and 18 are provided in the reinforce 14.
Are present in the upper and lower areas, a range B in which only the foam material 16 is present, and a range C in which no foam material is present ((b) in the figure).
【００１８】前後方向の荷重に対して範囲Ａの強度が最
も強く、範囲Ｃの強度が最も弱く、範囲Ｂの強度が２つ
の範囲Ａ，Ｃそれぞれの強度の中間となり、これら範囲
が車体の幅方向へ連続していて強度差が小さくなってい
るため、自動車が後退してバンパがポール３０に衝突し
たとき、衝突荷重がどの部位に入力しても、リィインフ
ォース１４に発生する応力が集中することなく、分散さ
れる。その結果、リィインフォース１４は、図４の
（a）のような変形をする。The strength of the range A is the strongest with respect to the load in the front-rear direction, the strength of the range C is the weakest, and the strength of the range B is intermediate between the strengths of the two ranges A and C. When the vehicle retreats and the bumper collides with the pole 30, the stress generated in the reinforcement 14 concentrates no matter where the collision load is applied. Without being dispersed. As a result, the reinforcement 14 deforms as shown in FIG.
【００１９】これに対して、図５に示すように、リィイ
ンフォース１４の筒部２０，２２内に同じ長さの発泡材
３２をそれぞれ充填した場合、発泡材が上下で重なって
存在する範囲Ａと、発泡材が存在しない範囲Ｃとが生ず
るが、範囲Ａと範囲Ｃとの境界部３４では強度差が大き
い。そのため、バンパが範囲Ａの中央でポール３０に衝
突したときでも、境界部３４に応力集中が生ずる。その
結果、リィインフォース１４は図５の（a）のような変
形をする。また、図６に示すように、リィインフォース
１４の筒部２０，２２内に発泡材を充填しない場合、バ
ンパがポール３０に衝突すると、その衝突した部位に応
力集中が生じ、リィインフォース１４はポール３０と衝
突した部分３６で座屈する傾向がある。On the other hand, as shown in FIG. 5, when the foam members 32 of the same length are filled in the cylindrical portions 20 and 22 of the reinforcement 14, respectively, the range in which the foam members overlap vertically is present. A and a range C where no foam material is present occur, but the difference in strength is large at the boundary 34 between the range A and the range C. Therefore, even when the bumper collides with the pole 30 at the center of the range A, stress concentration occurs at the boundary portion 34. As a result, the reinforcement 14 deforms as shown in FIG. As shown in FIG. 6, when the foam material is not filled in the cylindrical portions 20 and 22 of the reinforce 14, when the bumper collides with the pole 30, a stress concentration occurs at the collided portion, and the reinforce 14 Tend to buckle at the portion 36 that collided with the pole 30.
【００２０】本発明に係る支持構造によれば、図４に示
したように、応力が分散され、座屈が生じないため、荷
重対変位特性は図７のＤのようになる。これに対して、
図６に示した、リィインフォースの筒部２０，２２に発
泡材を充填しないものでは、ある変位で座屈Ｅが生じ、
荷重対変位特性は図７のＦのようになる。図７から明ら
かであるように、本発明に係る支持構造Ｄによれば、荷
重のピーク値が高く、変位の小さい特性が得られるが、
発泡材を充填しない支持構造Ｆでは、荷重のピーク値が
低く、変位の大きい特性となっている。According to the support structure of the present invention, as shown in FIG. 4, since the stress is dispersed and no buckling occurs, the load-displacement characteristic becomes as shown in FIG. 7D. On the contrary,
In the case where the foaming material is not filled in the cylindrical portions 20 and 22 of the reinforcement shown in FIG. 6, buckling E occurs at a certain displacement,
The load-displacement characteristic is as shown in F of FIG. As is clear from FIG. 7, according to the support structure D according to the present invention, a characteristic is obtained in which the peak value of the load is high and the displacement is small.
In the support structure F not filled with the foam material, the peak value of the load is low and the displacement is large.
【００２１】前記実施例では、バンパ１２は自動車の後
方の端部に設けてあるが、本発明は前方の端部に設ける
バンパを支持する構造として実施することもできる。ま
た、リィインフォースの上方の筒部内の発泡材１６の長
さの方が下方の筒部内の発泡材１８の長さより長いが、
これは逆に、下方の発泡材１８の方が上方の発泡材１６
より長くなるように配置することもできる。In the above embodiment, the bumper 12 is provided at the rear end of the vehicle. However, the present invention may be embodied as a structure for supporting the bumper provided at the front end. Also, the length of the foam material 16 in the upper tube portion of the reinforcement is longer than the length of the foam material 18 in the lower tube portion,
Conversely, the lower foam 18 is better than the upper foam 16
It can be arranged to be longer.
【図１】本発明に係る自動車のバンパの支持構造の実施
例を示す斜視図である。FIG. 1 is a perspective view showing an embodiment of a support structure for a bumper of an automobile according to the present invention.
【図２】図１の２−２線で切断した断面図である。FIG. 2 is a sectional view taken along line 2-2 of FIG.
【図３】本発明に係る支持構造を適用できる自動車の後
方から見た斜視図である。FIG. 3 is a rear perspective view of an automobile to which the support structure according to the present invention can be applied.
【図４】本発明に係るバンパの支持構造の作用を示す模
式図で、（a）は平面を、（b）は背面を示している。FIGS. 4A and 4B are schematic views showing the operation of the bumper support structure according to the present invention, wherein FIG. 4A is a plan view and FIG.
【図５】本発明に係るバンパの支持構造と比較するため
の支持構造の作用を示す模式図で、（a）は平面を、
（b）は背面を示している。FIGS. 5A and 5B are schematic views showing the operation of the support structure for comparison with the bumper support structure according to the present invention, wherein FIG.
(B) shows the back.
【図６】従来のバンパの支持構造の作用を示す模式図
で、（a）は平面を、（b）は背面を示している。6A and 6B are schematic views showing the operation of a conventional bumper support structure, wherein FIG. 6A shows a plane view and FIG. 6B shows a rear view.
【図７】荷重対変位のエネルギ吸収特性図である。FIG. 7 is an energy absorption characteristic diagram of load versus displacement.
１０ 自動車 １２ バンパ １４ リィインフォース １６，１８ 発泡材 ２０ 上方の筒部 ２２ 下方の筒部 DESCRIPTION OF SYMBOLS 10 Automobile 12 Bumper 14 Reinforcement 16,18 Foam 20 Upper cylinder 22 Lower cylinder
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平10−76889（ＪＰ，Ａ) 実開 平４−112143（ＪＰ，Ｕ) 実開 平４−62249（ＪＰ，Ｕ) 実開 昭58−135347（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) B60R 19/04 B60R 19/18 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-10-76889 (JP, A) JP-A 4-112143 (JP, U) JP-A 4-62249 (JP, U) JP-A 58- 135347 (JP, U) (58) Field surveyed (Int. Cl. 7 , DB name) B60R 19/04 B60R 19/18
Claims (1)
されるバンパを支持する構造であって、 上方の筒部と 下方の筒部とを有するように形成され車体
の幅方向へ伸びる、前記バンパを取り付けるリィインフ
ォースと、 このリィインフォースの前記上方の筒部及び下方の筒部
内にそれぞれ充填された発泡材とを備え、 前記上方の筒部内の発泡材は、車体の前後方向へ伸びる
中心線を含む仮想鉛直面をはさんで車体の幅方向の両側
へ所定長さ伸びており、前記下方の筒部内の発泡材は、
前記仮想鉛直面をはさんで車体の幅方向の両側へ前記上
方の発泡材とは異なる長さ伸びている、自動車のバンパ
の支持構造。1. A structure for supporting a bumper disposed at a front end or a rear end of an automobile, wherein the vehicle is formed to have an upper cylinder and a lower cylinder.
A reinforce for attaching the bumper, which extends in the width direction, and a foam material filled in the upper tubular portion and the lower tubular portion of the reinforce, respectively. The foam material in the upper tubular portion is , Extends in the longitudinal direction of the vehicle body
Extending a predetermined length to both sides in the width direction of the vehicle body across the virtual vertical plane including the center line , the foam material in the lower cylindrical portion,
A support structure for a bumper of a vehicle, which extends on both sides in the width direction of the vehicle body across the virtual vertical plane by a length different from that of the foam material above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14857698A JP3304881B2 (en) | 1998-05-29 | 1998-05-29 | Car bumper support structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14857698A JP3304881B2 (en) | 1998-05-29 | 1998-05-29 | Car bumper support structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11334500A JPH11334500A (en) | 1999-12-07 |
| JP3304881B2 true JP3304881B2 (en) | 2002-07-22 |
Family
ID=15455843
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14857698A Expired - Fee Related JP3304881B2 (en) | 1998-05-29 | 1998-05-29 | Car bumper support structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3304881B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20040041806A (en) * | 2002-11-11 | 2004-05-20 | 현대자동차주식회사 | Rear bumper structure of automobile |
| JP4324240B1 (en) | 2008-02-27 | 2009-09-02 | 株式会社神戸製鋼所 | Bumper structure |
| US9815424B2 (en) | 2013-03-07 | 2017-11-14 | Toray Carbon Magic Co., Ltd. | Bumper device for automobile |
| CN107627981B (en) * | 2017-09-22 | 2023-09-19 | 天津盛相电子有限公司 | Shock-resistant support for vehicle |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58135347U (en) * | 1982-03-08 | 1983-09-12 | トヨタ自動車株式会社 | Bumper reinforcement structure |
| JPH0462249U (en) * | 1990-10-05 | 1992-05-28 | ||
| JPH04112143U (en) * | 1991-03-18 | 1992-09-29 | 三菱自動車工業株式会社 | vehicle bumper device |
| JPH1076889A (en) * | 1996-09-05 | 1998-03-24 | Toyota Motor Corp | Bumper reinforce |
-
1998
- 1998-05-29 JP JP14857698A patent/JP3304881B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH11334500A (en) | 1999-12-07 |
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