JPH11235958A - Vehicle body bumper structure - Google Patents
Vehicle body bumper structureInfo
- Publication number
- JPH11235958A JPH11235958A JP5423498A JP5423498A JPH11235958A JP H11235958 A JPH11235958 A JP H11235958A JP 5423498 A JP5423498 A JP 5423498A JP 5423498 A JP5423498 A JP 5423498A JP H11235958 A JPH11235958 A JP H11235958A
- Authority
- JP
- Japan
- Prior art keywords
- bumper
- vehicle body
- external force
- shock absorbing
- bumper structure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、車体側に取り付け
られるバンパ構造に係り、特に、外力作用時において衝
撃エネルギーを吸収するに好適な車体用バンパ構造に関
する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bumper structure mounted on a vehicle body, and more particularly to a bumper structure suitable for absorbing impact energy when an external force acts.
【０００２】[0002]
【従来の技術】自動車の前後にはバンパが取り付けられ
自動車を保護している。例えば、図９は自動車の後方に
取り付けられる従来のバンパ構造を示すものである。自
動車の後方にはリヤボディパネル１０が設けられ、リヤ
バンパ１２はその下方の後方に配置され、外力がリヤボ
ディパネル１０に直接作用するのを防止している。従来
のリヤバンパ１２は図示のようにシャシフレーム１３側
に固定されるものが多く、リヤボディパネル１０側には
固定されない。すなわち、シャシフレーム１３に基端側
を固定されるバックバー２３の後端側にはリインフォー
ス２４が固定され、リヤバンパ１２はこのリインフォー
ス２４に固定される。2. Description of the Related Art Bumpers are attached to the front and rear of an automobile to protect the automobile. For example, FIG. 9 shows a conventional bumper structure attached to the rear of an automobile. A rear body panel 10 is provided at the rear of the vehicle, and a rear bumper 12 is disposed below and behind the rear bumper 12 to prevent external force from directly acting on the rear body panel 10. Many of the conventional rear bumpers 12 are fixed to the chassis frame 13 as shown in the figure, but are not fixed to the rear body panel 10. That is, the reinforce 24 is fixed to the rear end of the back bar 23 whose base end is fixed to the chassis frame 13, and the rear bumper 12 is fixed to the reinforce 24.
【０００３】[0003]
【発明が解決しようとする課題】図９に示したリヤバン
パ１２に外力が作用すると、その衝撃力はリヤバンパ１
２を介してリインフォース２４及びシャシフレーム１３
等に作用する。これ等は比較的高剛性のため変形量は少
なく、リヤボディパネル１０の損傷は生じない。しかし
ながら、衝撃エネルギーの吸収度合は少なく、大きな衝
撃力が自動車に作用する。一方、近年の傾向としてバン
パを直接車体側に固定するものが採用される。すなわ
ち、図９におけるリヤボディパネル１０側に直接リヤバ
ンパ１２の基端側を固定するものが採用される。従っ
て、リヤバンパ１２側に衝撃エネルギーを吸収する手段
が設けられていないとリヤボディパネル１０側に外力が
直接作用し、これを変形させるという問題点がある。When an external force acts on the rear bumper 12 shown in FIG.
2 through the reinforcement 24 and the chassis frame 13
Act on etc. Since these have relatively high rigidity, the deformation amount is small, and the rear body panel 10 is not damaged. However, the degree of absorption of impact energy is small, and a large impact force acts on the automobile. On the other hand, in recent years, a type in which a bumper is directly fixed to a vehicle body is adopted. That is, the one that fixes the base end side of the rear bumper 12 directly to the rear body panel 10 side in FIG. 9 is employed. Therefore, if the means for absorbing impact energy is not provided on the rear bumper 12 side, there is a problem that an external force acts directly on the rear body panel 10 side and deforms it.
【０００４】衝撃吸収部材をバンパ内及びバンパまわり
に設けた公知技術としては各種のものが挙げられる。例
えば、実開昭５９−１１０７５４号公報，実開昭５９−
１５１７５６号公報，実開昭６１−１９３８４６号公報
等がある。実開昭５９−１１０７５４号公報の「自動車
用バンパ構造」は、表皮材と強度部材とを組み合わせて
形成される自動車用バンパの前記強度部材に、衝突エネ
ルギー吸収部材を固設し、その先端側を前記表皮材に近
接して配置し、外力作用時に衝突エネルギー吸収部材を
表皮材に当接せしめて衝突エネルギーを吸収するもので
ある。また、実開昭５９−１５１７５６号公報の「自動
車用バンパ構造」は、バンパを車体部材に固定するため
のステーに衝突エネルギーを吸収し得る変形部を設け、
外力作用時には前記変形部の変形により衝突エネルギー
を吸収するものである。また、実開昭６１−１９３８４
６号公報の「自動車のバンパー」は、バンパー本体の内
側に中空に成形したインナー部品を配置し、このインナ
ー部品に蛇腹部を設け、この蛇腹部を前記バンパ本体及
び／又は車のボディ側に固定したものである。There are various known techniques for providing a shock absorbing member in and around a bumper. For example, Japanese Utility Model Application Laid-Open No. 59-110754 and Japanese Utility Model Application Laid-open No.
No. 151756, Japanese Utility Model Application Laid-Open No. 61-193846, and the like. Japanese Unexamined Utility Model Publication No. 59-110754 discloses a "vehicle bumper structure" in which a collision energy absorbing member is fixed to the strength member of a vehicle bumper formed by combining a skin material and a strength member, and a tip end side thereof is provided. Are disposed close to the skin material, and the collision energy absorbing member is brought into contact with the skin material when an external force acts to absorb the collision energy. Japanese Unexamined Utility Model Publication No. 59-151756 discloses a "car bumper structure" in which a stay for fixing the bumper to a vehicle body member is provided with a deformable portion capable of absorbing collision energy.
When an external force is applied, the collision energy is absorbed by the deformation of the deformation portion. In addition, 61-19384
No. 6, the "automobile bumper" has a hollow inner part disposed inside a bumper main body, a bellows portion provided in the inner part, and the bellows portion is provided on the bumper main body and / or the car body side. It is fixed.
【０００５】前記の公知技術はいずれも外力作用時にお
いて衝突エネルギーを有効に吸収し、車体側の変形を防
止する効果を有するものである。しかしながら、これ等
はすべてバンパ側に装着されるものであり、バンパと離
隔して配置されるものではない。また、その衝突吸収箇
所もバンパの長手方向の全長にわたって形成されるもの
ではなく、部分的に配設されるものである。そのためバ
ンパに作用する外力の形態によっては衝突エネルギーの
吸収が不十分となる恐れが多い。また、前記のようにバ
ンパと一体的構造のため、バンパ自体がコスト高とな
り、組み付けた多くの時間を必要とする。また、これ等
の公知技術では、極めて大きな外力が作用した場合の配
慮が不十分である。All of the above-mentioned known techniques have an effect of effectively absorbing collision energy when an external force is applied and preventing deformation of the vehicle body. However, these are all mounted on the bumper side, and are not disposed separately from the bumper. Further, the collision absorbing portion is not formed over the entire length in the longitudinal direction of the bumper, but is partially provided. Therefore, depending on the form of the external force acting on the bumper, the collision energy is often insufficiently absorbed. In addition, as described above, since the structure is integral with the bumper, the cost of the bumper itself increases, and much time is required for assembly. In addition, these known techniques do not provide sufficient consideration when an extremely large external force is applied.
【０００６】本発明は、以上の事情に鑑みて創案された
ものであり、車体側に保持されるバンパ構造であって、
各種形態の外力の作用時において衝撃エネルギーを十分
に吸収することができ、更に大きな外力作用時において
も車体側の変形を低減すべく機能し、かつ比較的構造簡
単で安価に実施でき、組み付けが比較的容易に行われる
車体用バンパ構造を提供することを目的とする。The present invention has been made in view of the above circumstances, and has a bumper structure held on a vehicle body side.
It can sufficiently absorb impact energy when various forms of external force is applied, functions to reduce deformation on the vehicle body side even when a large external force is applied, and is relatively simple in structure and can be implemented at low cost. An object of the present invention is to provide a vehicle body bumper structure that is relatively easily performed.
【０００７】[0007]
【課題を解決するための手段】本発明は、以上の目的を
達成するために、車体側に保持されると共に適宜間隔を
介してシャシフレームの端部と相対向して配置され、外
力作用時における衝撃エネルギーを吸収すべく形成され
るバンパ構造であって、前記車体側とバンパの内面との
間に前記バンパの全長とほぼ同一の長さを有し、前記外
力の作用方向に沿って変形する別体の衝撃吸収部材を介
在させ、該衝撃吸収部材は、前記外力の作用時において
少なくとも前記シャシフレームの端部よりも先に前記バ
ンパに当接すべく配置される車体用バンパ構造を構成す
るものである。更に具体的に、前記車体側がリヤボディ
パネルであり、前記バンパが、前記リヤボディパネルに
その基端側を固定して支持されるリヤバンパであること
を特徴とする。また、前記衝撃吸収部材には、外力作用
時に座屈の基点となる衝撃吸収孔が設けられるものであ
る。また、前記衝撃吸収部材が複数の波形を有する波形
状部材からなり、該部材は、前記車体側に部分的に固定
支持されるものであり、前記波形状部材は、その両端側
に固定されるブラケットにより前記車体側に固定支持さ
れるものからなり、前記波形状部材とブラケットとの固
定部位は、前記外力の作用方向に対し、移動可能な自由
度を有するものであることを特徴とする。SUMMARY OF THE INVENTION In order to achieve the above objects, the present invention provides a power transmission device which is held on a vehicle body side and is disposed opposite to an end of a chassis frame with an appropriate space therebetween so that an external force is applied. A bumper structure formed to absorb the impact energy of the bumper, having a length substantially equal to the entire length of the bumper between the vehicle body side and the inner surface of the bumper, and deforming along a direction in which the external force acts. A shock absorbing member separate from the chassis frame, and the shock absorbing member constitutes a vehicle body bumper structure that is arranged to abut the bumper at least before an end of the chassis frame when the external force is applied. Is what you do. More specifically, the vehicle body side is a rear body panel, and the bumper is a rear bumper supported by fixing the base end side to the rear body panel. Further, the shock absorbing member is provided with a shock absorbing hole serving as a base point of buckling when an external force is applied. Further, the shock absorbing member is formed of a corrugated member having a plurality of waveforms, and the member is partially fixed and supported on the vehicle body side, and the corrugated member is fixed on both ends. A bracket is fixedly supported on the vehicle body side by a bracket, and a fixed portion between the corrugated member and the bracket has a degree of freedom in which it can move in a direction in which the external force acts.
【０００８】バンパは車体側に保持され、これと別体の
衝撃吸収部材を前記車体側とバンパの内面との間に介設
させる。また、バンパはシャシフレームの端部と相対向
して配置され、外力が作用しない場合は、バンパは衝撃
吸収部材及びシャシフレームの端部等と間隔を有する位
置に配置されるが、衝撃吸収部材の方がバンパに近接し
て配置される。外力作用時にバンパはまず衝撃吸収部材
に当り、衝撃エネルギーの吸収が行われる。更に、大き
な外力が作用すると、衝撃吸収部材が更に変形すると共
にバンパはシャシフレームの端部に当り、この変形によ
り衝撃エネルギーの吸収を行う。以上により、外力作用
時において車体側の変形が防止される。なお、車体修理
時には、バンパ及び別体の衝撃吸収部材を交換すればよ
く、修理費は比較的安くすむ。また、衝撃吸収部材は別
体のため、組み付けや交換が比較的簡単に行われ、作業
性の向上が図れる。The bumper is held on the vehicle body, and a separate shock absorbing member is provided between the vehicle body and the inner surface of the bumper. Further, the bumper is disposed to face the end of the chassis frame, and when no external force is applied, the bumper is disposed at a position spaced from the shock absorbing member and the end of the chassis frame. Is disposed closer to the bumper. When an external force is applied, the bumper first hits the shock absorbing member, and the shock energy is absorbed. Further, when a large external force is applied, the shock absorbing member is further deformed, and the bumper hits the end of the chassis frame, thereby absorbing the shock energy. As described above, the deformation of the vehicle body is prevented when an external force is applied. At the time of repairing the vehicle body, the bumper and the separate shock absorbing member may be replaced, and the repair cost is relatively low. Also, since the shock absorbing member is separate, assembly and replacement can be performed relatively easily, and workability can be improved.
【０００９】[0009]
【発明の実施の形態】以下、本発明の車体用バンパ構造
の実施の形態を図面を参照して詳述する。本例は車体の
リヤボディパネル側に装着されるリヤバンパについて説
明するが、勿論、これに限定するものではない。図１及
び図３に示すように、車体の最後部の開口部１５を開閉
するリヤドアパネル１６の下方側にはリヤボディパネル
１０が配置される。また、その下方にはシャシフレーム
１３が配置され、シャシフレーム１３の端部にはクロス
メンバ１４が左右のシャシフレーム１３の端部間に架設
されて配置される。また、前記開口部１５を形成するリ
ヤエンドパネル１７にはテールランプ１８等が装着され
る。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a vehicle bumper structure according to an embodiment of the present invention. In this example, a rear bumper mounted on the rear body panel side of the vehicle body will be described, but, of course, the present invention is not limited to this. As shown in FIGS. 1 and 3, a rear body panel 10 is disposed below a rear door panel 16 which opens and closes a rearmost opening 15 of the vehicle body. Further, a chassis frame 13 is disposed below the chassis frame 13, and a cross member 14 is disposed between the ends of the left and right chassis frames 13 at the ends of the chassis frame 13. A tail lamp 18 and the like are mounted on a rear end panel 17 that forms the opening 15.
【００１０】リヤバンパ１２は図１に示すような横断面
形状を有する部材からなり、その基端側のフランジ１９
はリヤボディパネル１０にボルト２０等により固定され
る。すなわち、リヤバンパ１２はリヤボディパネル１０
に片持ち状態で保持される。一方、衝撃吸収部材である
波形状部材１はリヤボディパネル１０とリヤバンパ１２
の内面との間のシャシフレーム１３の上方側に配置さ
れ、後に詳述するがブラケット３によりリヤボディパネ
ル１０に連結される。なお、図２に示すように、波形状
部材１には衝撃吸収孔２５が開口形成される。衝突時等
において波形状部材１はこの衝撃吸収孔２５を基点とし
て座屈する。The rear bumper 12 is made of a member having a cross-sectional shape as shown in FIG.
Is fixed to the rear body panel 10 by bolts 20 or the like. That is, the rear bumper 12 is
Is held in a cantilevered state. On the other hand, the wave-shaped member 1 serving as a shock absorbing member includes a rear body panel 10 and a rear bumper 12.
And is connected to the rear body panel 10 by the bracket 3 as will be described in detail later. In addition, as shown in FIG. 2, a shock absorbing hole 25 is formed in the corrugated member 1. During a collision or the like, the corrugated member 1 buckles with the shock absorbing hole 25 as a base point.
【００１１】図２は本例における波形状部材１の詳細構
造を示す。波形状部材１はリヤバンパ１２の全長とほぼ
等しい全長の細長い板材からなり、横断面形状としては
複数個（図示では３個）の波形２を形成するものからな
る。材質，板厚等については特に限定するものではない
が、自動車に作用する衝撃力を十分に吸収し得る機能を
有するものであればよい。ブラケット３は、本例では波
形状部材１の両端側に連結されるものからなり、図１に
示すように、波形状部材１の下面に当接する当接部４
と、当接部４と直交しリヤボディパネル１０側に固定さ
れるフランジ部５とを有するものからなる。ブラケット
３には、取り付け孔６が本例では２箇所形成され、これ
と見合う波形状部材１の位置にも取り付け孔７が２箇所
形成される。なお、ブラケット３と波形状部材１との固
定はボルト８，ナット９により行われるが、ボルト８の
直径に対し波形状部材１の取り付け孔７の内径は大径に
形成され、その径差分だけ波形状部材１は移動可能にな
る。また、フランジ部５はリヤボディパネル１０にボル
ト１１等により固定される。従って、波形状部材１はブ
ラケット３を介し、リヤボディパネル１０側に片持ち支
持される。また、この状態で波形状部材１のリヤバンパ
１２側の端部とリヤバンパ１２の内面の間には間隔ａが
形成される。FIG. 2 shows a detailed structure of the corrugated member 1 in this embodiment. The corrugated member 1 is formed of an elongated plate having a total length substantially equal to the total length of the rear bumper 12 and has a plurality of (three in the drawing) corrugations 2 in cross-sectional shape. The material, plate thickness and the like are not particularly limited, but may be any as long as they have a function of sufficiently absorbing the impact force acting on the automobile. In this example, the bracket 3 is connected to both ends of the corrugated member 1, and as shown in FIG. 1, a contact portion 4 that contacts the lower surface of the corrugated member 1.
And a flange portion 5 orthogonal to the contact portion 4 and fixed to the rear body panel 10 side. In the present embodiment, two mounting holes 6 are formed in the bracket 3, and two mounting holes 7 are also formed at positions corresponding to the corrugated member 1. The bracket 3 and the corrugated member 1 are fixed by bolts 8 and nuts 9. The inner diameter of the mounting hole 7 of the corrugated member 1 is formed to be larger than the diameter of the bolt 8, and only the difference between the diameters is provided. The corrugated member 1 becomes movable. The flange portion 5 is fixed to the rear body panel 10 with bolts 11 and the like. Accordingly, the corrugated member 1 is cantilevered on the rear body panel 10 side via the bracket 3. In this state, a gap a is formed between the end of the corrugated member 1 on the rear bumper 12 side and the inner surface of the rear bumper 12.
【００１２】前記したように、シャシフレーム１３の後
端部にはクロスメンバ１４が固定され、クロスメンバ１
４はリヤバンパ１２の内面と相対向して配置される。な
お、クロスメンバ１４とリヤバンパ１２の内面との間の
間隔ｂは波形状部材１の端部とリヤバンパ１２の内面と
の間の間隔ａよりも大きい。As described above, the cross member 14 is fixed to the rear end of the chassis frame 13,
Reference numeral 4 is arranged so as to face the inner surface of the rear bumper 12. The distance b between the cross member 14 and the inner surface of the rear bumper 12 is larger than the distance a between the end of the corrugated member 1 and the inner surface of the rear bumper 12.
【００１３】次に、本例におけるリヤバンパ１２に外力
が作用した場合の衝撃エネルギーの吸収状態を図４乃至
図５の模式図により説明する。リヤバンパ１２に外力Ｆ
が作用すると、リヤバンパ１２自体が変形し、前記間隔
ａがなくなり、リヤバンパ１２の内面が波形状部材１の
端部に当る。更に、リヤバンパ１２が変形すると波形状
部材１は衝撃吸収孔２５を基点として座屈が始まり、次
第に波形２がつぶれ、全体が縮んで外力Ｆによる衝撃エ
ネルギーを吸収する。この場合、波形状部材１はブラケ
ット３により支持されているが、ブラケット３への取り
付け孔７がボルト８の直径より大きいため、外力Ｆの作
用によりまず、波形状部材１のみが縮み方向に移動し、
次に、ブラケット３に外力が作用する。但し、後に説明
するようにブラケット３は波形状部材１に較べて高剛性
のため、ブラケット３と連結されている波形状部材１の
部位の変形量は他の部分に較べて少ない。以上のよう
に、波形状部材１は部分的に変形量は異なるが、外力Ｆ
による衝撃エネルギーをその全長にわたる変形により吸
収する。Next, the state of absorbing impact energy when an external force acts on the rear bumper 12 in this embodiment will be described with reference to the schematic diagrams of FIGS. External force F applied to rear bumper 12
Acts, the rear bumper 12 itself is deformed, the gap a disappears, and the inner surface of the rear bumper 12 hits the end of the corrugated member 1. Further, when the rear bumper 12 is deformed, the wave-shaped member 1 starts to buckle with the shock absorbing hole 25 as a base point, the waveform 2 is gradually collapsed, and the entire waveform shrinks to absorb the impact energy due to the external force F. In this case, the corrugated member 1 is supported by the bracket 3, but since the mounting hole 7 to the bracket 3 is larger than the diameter of the bolt 8, only the corrugated member 1 first moves in the contracting direction by the action of the external force F. And
Next, an external force acts on the bracket 3. However, as will be described later, since the bracket 3 has higher rigidity than the corrugated member 1, the amount of deformation of the portion of the corrugated member 1 connected to the bracket 3 is smaller than that of other portions. As described above, although the amount of deformation of the corrugated member 1 is partially different, the external force F
Impact energy due to deformation over its entire length.
【００１４】外力Ｆよりも大きな外力Ｆ1 が作用する
と、リヤバンパ１２の変形が更に進み、波形状部材１の
変形も大きくなる。よって、リヤバンパ１２の内面がク
ロスメンバ１４の端面に当り、更に、クロスメンバ１４
を変形させる。この状態では外力Ｆ1 による衝撃エネル
ギーは波形状部材１の変形とクロスメンバ１４の変形に
よって吸収される。しかしながら、クロスメンバ１４自
体は比較的高剛性のため、その変形量は少なく、リヤボ
ディパネル１０側の変形をくい止めることができる。以
上により、外力による衝撃エネルギーの吸収と、リヤボ
ディパネル１０側の変形防止との両効果を上げることが
できる。また、前記のように、本例の場合は、車両の横
幅に近い全長を有する波形状部材１により衝撃エネルギ
ーを吸収するため、従来技術に較べて衝撃エネルギーの
吸収率を大幅に向上させることができる。また、波形状
部材１はリヤバンパ１２とは別体のもので、車両の種類
に応じて適宜のものを設定することができる。また、波
形２の形状も任意に形成できる。更に、外力により変形
した波形状部材１の交換も容易であり、新車の場合にお
ける取り付け作業もリヤバンパ１２の取り付けとは別に
行われるため容易である。[0014] acts large external force F 1 than the external force F, further advances the deformation of the rear bumper 12, the greater the deformation of the wave-shaped member 1. Therefore, the inner surface of the rear bumper 12 hits the end surface of the cross member 14, and furthermore, the cross member 14
To transform. In this state, the impact energy due to the external force F 1 is absorbed by the deformation of the corrugated member 1 and the deformation of the cross member 14. However, since the cross member 14 itself has relatively high rigidity, the amount of deformation is small, and the deformation on the rear body panel 10 side can be suppressed. As described above, both effects of absorbing impact energy due to external force and preventing deformation of the rear body panel 10 can be achieved. Further, as described above, in the case of the present example, since the shock energy is absorbed by the corrugated member 1 having the entire length close to the width of the vehicle, the absorption rate of the shock energy can be greatly improved as compared with the related art. it can. Further, the corrugated member 1 is separate from the rear bumper 12, and an appropriate member can be set according to the type of the vehicle. Further, the shape of the waveform 2 can be arbitrarily formed. Further, it is easy to replace the corrugated member 1 deformed by an external force, and the mounting operation in the case of a new vehicle is also easy because it is performed separately from the mounting of the rear bumper 12.
【００１５】次に、図６乃至図８により、リヤバンパ１
２側に衝突する衝突物の種類に対応する波形状部材１の
長手方向の波形状態を模式的に示す。図６は外力の作用
前における波形状部材１及びこれを支持するブラケット
３を模式的に示したものである。まず、図７に示すよう
に、衝突物がポール２１の場合を説明する。ポール２１
がリヤバンパ１２の中央に当接すると、波形状部材１の
中央部が大きく変形し、それに伴って中央部以外の部分
が変形する。以上の変形により衝撃エネルギーの吸収が
行われる。この場合、ブラケット３側への外力の作用が
比較的小さいためブラケット３側の変形は少ない。Next, referring to FIG. 6 to FIG.
The waveform state in the longitudinal direction of the corrugated member 1 corresponding to the type of the collision object that collides with the two sides is schematically shown. FIG. 6 schematically shows the corrugated member 1 and the bracket 3 supporting the corrugated member 1 before the action of the external force. First, the case where the collision object is the pole 21 as shown in FIG. 7 will be described. Paul 21
Abuts against the center of the rear bumper 12, the central portion of the corrugated member 1 is greatly deformed, and accordingly, portions other than the central portion are deformed. Absorption of impact energy is performed by the above deformation. In this case, since the action of the external force on the bracket 3 side is relatively small, the deformation on the bracket 3 side is small.
【００１６】次に、図８に示すように、リヤバンパ１２
側に平板状衝突物２２が作用するとリヤバンパ１２及び
波形状部材１の全体が変形する。この場合でも波形状部
材１はその中央部が最も変形し易いが、その変形量は図
７に示したポール２１が作用した場合よりも小さく、波
形状部材１は全体として変形し、衝撃エネルギーを吸収
する。更に、平板状衝突物２２による外力が大きい場合
は、図８に示すようにブラケット３側も寸法δの分だけ
移動し、衝撃エネルギーの吸収が行われる。以上のよう
に、衝突物の種類により波形状部材１やブラケット３等
の変形状態は異なるが、外力による衝撃エネルギーは十
分に吸収され、かつリヤボディパネル１０側の変形が防
止される結果となる。また、衝撃吸収孔２５は図示では
６個の丸孔としたが、数及び形状は図示のものに限定す
るものではない。Next, as shown in FIG.
When the flat collision object 22 acts on the side, the entire rear bumper 12 and the corrugated member 1 are deformed. Even in this case, the corrugated member 1 is most easily deformed at its central portion, but the amount of deformation is smaller than when the pole 21 shown in FIG. 7 acts, and the corrugated member 1 is deformed as a whole to reduce the impact energy. Absorb. Further, when the external force due to the flat collision object 22 is large, the bracket 3 also moves by the dimension δ as shown in FIG. 8, and the impact energy is absorbed. As described above, the deformation state of the corrugated member 1, the bracket 3, and the like differs depending on the type of the collision object, but the impact energy due to the external force is sufficiently absorbed and the rear body panel 10 side is prevented from being deformed. . Further, the shock absorbing holes 25 are six round holes in the figure, but the number and shape are not limited to those shown.
【００１７】[0017]
【発明の効果】１）本発明の請求項１に記載の車体用バ
ンパ構造によれば、車体側とバンパとの間に前記バンパ
の全長とほぼ等しい全長の衝撃吸収部材を介在させ、該
衝撃吸収部材は外力の作用時にその作用方向に変形する
ため、衝撃エネルギーを十分に吸収することができる。
また、衝撃エネルギーの吸収が衝撃吸収部材のみで不十
分な場合はシャシフレーム側で衝撃力を受ける。これに
より、車体側への損傷が防止される。また、衝撃吸収部
材はバンパと別体のため、取り付け，取り外し作業が簡
単に操作でき、かつバンパまわりの構造の簡易化が図れ
る。 ２）本発明の請求項２に記載の車体用バンパ構造によれ
ば、本発明がリヤバンパに適用されるため、リヤボディ
パネルの損傷が防止される。 ３）本発明の請求項３に記載の車体用バンパ構造によれ
ば、外力作用時には衝撃吸収孔を基点として座屈が始ま
るため、座屈の進行が均一化され、予め想定した変形が
行われ外力作用時における変形状態を想定することがで
きる。 ４）本発明の請求項４に記載の車体用バンパ構造によれ
ば、衝撃吸収部材が複数の波形を形成する波形状部材か
らなり、波形の変形により十分に衝撃力を吸収すること
ができる。また、波形状部材は車体側に安定保持され
る。 ５）本発明の請求項５に記載の車体用バンパ構造によれ
ば、波形状部材はその両端側をブラケットを介して車体
側に固定され、かつブラケットと波形状部材との間に外
力の作用方向に移動可能な自由度を有するため、衝撃力
作用時には波形状部材がまず衝撃エネルギーを吸収し、
次にブラケットに両端側を支持された状態で外力を吸収
し、更に、ブラケットの変形により外力を吸収するとい
うきめの細かい衝撃力の吸収作用が行われる。1) According to the bumper structure for a vehicle body according to the first aspect of the present invention, a shock absorbing member having a total length substantially equal to the total length of the bumper is interposed between the vehicle body and the bumper. Since the absorbing member is deformed in the direction of action when an external force is applied, it is possible to sufficiently absorb impact energy.
Further, when the shock energy is not absorbed only by the shock absorbing member, the chassis frame receives a shock force. This prevents damage to the vehicle body. Further, since the shock absorbing member is separate from the bumper, the mounting and dismounting operations can be easily performed, and the structure around the bumper can be simplified. 2) According to the vehicle body bumper structure of the second aspect of the present invention, since the present invention is applied to the rear bumper, the rear body panel is prevented from being damaged. 3) According to the bumper structure for a vehicle body according to the third aspect of the present invention, when external force acts, buckling starts with the shock absorbing hole as a base point, so that the progress of buckling is uniformed and deformation assumed in advance is performed. A deformation state at the time of an external force can be assumed. 4) According to the bumper structure for a vehicle body according to claim 4 of the present invention, the shock absorbing member is formed of a corrugated member forming a plurality of waveforms, and the impact force can be sufficiently absorbed by the deformation of the waveform. Further, the corrugated member is stably held on the vehicle body side. 5) According to the bumper structure for a vehicle body according to claim 5 of the present invention, the wave-shaped member is fixed to the vehicle body side at both ends via the bracket, and an external force acts between the bracket and the wave-shaped member. Because it has a degree of freedom to move in the direction, the wave-shaped member first absorbs the impact energy when the impact force acts,
Then, the external force is absorbed while both ends are supported by the bracket, and further, the external force is absorbed by the deformation of the bracket, so that a fine impact force absorbing action is performed.
【図１】本発明の車体用バンパの全体構造を示す断面
図。FIG. 1 is a sectional view showing the overall structure of a vehicle body bumper according to the present invention.
【図２】本発明に使用される波形状部材及びこれを支持
するブラケットの詳細構造を示す斜視図。FIG. 2 is a perspective view showing a detailed structure of a corrugated member used in the present invention and a bracket for supporting the corrugated member.
【図３】車体のリヤボディの後端の概要構造を示す部分
斜視図。FIG. 3 is a partial perspective view showing a schematic structure of a rear end of a rear body of the vehicle body.
【図４】本発明の車体用バンパ構造の外力作用時におけ
る波形状部材の変形状態を示す模式図。FIG. 4 is a schematic diagram showing a deformed state of a wave-shaped member when an external force acts on the vehicle body bumper structure of the present invention.
【図５】比較的大きな外力作用時における本発明の車体
用バンパ構造の変形状態を示す模式図。FIG. 5 is a schematic diagram showing a deformed state of the vehicle body bumper structure of the present invention when a relatively large external force acts.
【図６】本発明における波形状部材の外力作用前の状態
を示す模式図。FIG. 6 is a schematic diagram showing a state before an external force acts on the corrugated member according to the present invention.
【図７】図６に示した波形状部材にポール状の衝突物が
作用した場合の変形状態を示す模式図。FIG. 7 is a schematic view showing a deformed state when a pole-shaped collision object acts on the corrugated member shown in FIG. 6;
【図８】図６に示した波形状部材に平板状の衝突物が作
用した場合の変形状態を示す模式図。FIG. 8 is a schematic diagram showing a deformed state when a flat collision object acts on the corrugated member shown in FIG. 6;
【図９】従来の車体用バンパ構造の一例を示す断面図。FIG. 9 is a cross-sectional view showing an example of a conventional body bumper structure.
１ 波形状部材 ２ 波形 ３ ブラケット ４ 当接部 ５ フランジ部 ６ 取り付け孔 ７ 取り付け孔 ８ ボルト ９ ナット １０ リヤボディパネル １１ ボルト １２ リヤバンパ １３ シャシフレーム １４ クロスメンバ １５ 開口部 １６ リヤドアパネル １７ リヤエンドパネル １８ テールランプ １９ フランジ ２０ ボルト ２１ ポール ２２ 平板状衝突物 ２５ 衝撃吸収孔 DESCRIPTION OF SYMBOLS 1 Corrugated member 2 Waveform 3 Bracket 4 Contact part 5 Flange part 6 Mounting hole 7 Mounting hole 8 Bolt 9 Nut 10 Rear body panel 11 Bolt 12 Rear bumper 13 Chassis frame 14 Cross member 15 Opening 16 Rear door panel 17 Rear end panel 18 Tail lamp DESCRIPTION OF SYMBOLS 19 Flange 20 Bolt 21 Pole 22 Flat impact object 25 Shock absorption hole
Claims (5)
してシャシフレームの端部と相対向して配置され、外力
作用時における衝撃エネルギーを吸収すべく形成される
バンパ構造であって、前記車体側とバンパの内面との間
に前記バンパの全長とほぼ同一の長さを有し、前記外力
の作用方向に沿って変形する別体の衝撃吸収部材を介在
させ、該衝撃吸収部材は、前記外力の作用時において少
なくとも前記シャシフレームの端部よりも先に前記バン
パに当接すべく配置されることを特徴とする車体用バン
パ構造。1. A bumper structure which is held on a vehicle body side and is disposed opposite to an end of a chassis frame with an appropriate space therebetween, and is formed to absorb impact energy when an external force is applied. A separate shock absorbing member having substantially the same length as the entire length of the bumper and interposed between the vehicle body side and the inner surface of the bumper and deforming along the direction of action of the external force is interposed. A bumper structure for a vehicle body, wherein the bumper structure is arranged to abut on the bumper at least before an end of the chassis frame when the external force is applied.
前記バンパが、前記リヤボディパネルにその基端側を固
定して支持されるリヤバンパである請求項１に記載の車
体用バンパ構造。2. The vehicle body is a rear body panel,
2. The vehicle body bumper structure according to claim 1, wherein the bumper is a rear bumper supported on the rear body panel by fixing a base end side thereof. 3.
屈の基点となる衝撃吸収孔が設けられるものである請求
項１に記載の車体用バンパ構造。3. The bumper structure for a vehicle body according to claim 1, wherein the shock absorbing member is provided with a shock absorbing hole serving as a base point of buckling when an external force is applied.
波形状部材からなり、該部材は、前記車体側に部分的に
固定支持されるものである請求項１又は２に記載の車体
用バンパ構造。4. The bumper for a vehicle body according to claim 1, wherein the shock absorbing member is formed of a corrugated member having a plurality of waveforms, and the member is partially fixed and supported on the vehicle body side. Construction.
れるブラケットにより前記車体側に固定支持されるもの
からなり、前記波形状部材とブラケットとの固定部位
は、前記外力の作用方向に対し、移動可能な自由度を有
するものである請求項４に記載の車体用バンパ構造。5. The corrugated member is fixedly supported on the vehicle body side by brackets fixed to both ends of the corrugated member, and a fixing portion between the corrugated member and the bracket is provided in a direction in which the external force acts. The bumper structure for a vehicle body according to claim 4, wherein the bumper structure has a movable degree of freedom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05423498A JP3931419B2 (en) | 1998-02-20 | 1998-02-20 | Body bumper structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05423498A JP3931419B2 (en) | 1998-02-20 | 1998-02-20 | Body bumper structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11235958A true JPH11235958A (en) | 1999-08-31 |
| JP3931419B2 JP3931419B2 (en) | 2007-06-13 |
Family
ID=12964862
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP05423498A Expired - Fee Related JP3931419B2 (en) | 1998-02-20 | 1998-02-20 | Body bumper structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3931419B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2915952A1 (en) * | 2007-05-11 | 2008-11-14 | Peugeot Citroen Automobiles Sa | End assembly for e.g. car, has stressing units to stress shock absorber towards lower edge of bodywork panel during mounting of absorber on mounting surface, where each unit is interposed between transversal beam and absorber |
| JP2021066227A (en) * | 2019-10-18 | 2021-04-30 | 小島プレス工業株式会社 | Absorber |
| WO2023189862A1 (en) * | 2022-03-31 | 2023-10-05 | 三菱自動車工業株式会社 | Rear bumper structure |
-
1998
- 1998-02-20 JP JP05423498A patent/JP3931419B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2915952A1 (en) * | 2007-05-11 | 2008-11-14 | Peugeot Citroen Automobiles Sa | End assembly for e.g. car, has stressing units to stress shock absorber towards lower edge of bodywork panel during mounting of absorber on mounting surface, where each unit is interposed between transversal beam and absorber |
| JP2021066227A (en) * | 2019-10-18 | 2021-04-30 | 小島プレス工業株式会社 | Absorber |
| WO2023189862A1 (en) * | 2022-03-31 | 2023-10-05 | 三菱自動車工業株式会社 | Rear bumper structure |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3931419B2 (en) | 2007-06-13 |
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