JP2726706B2 - Vehicle bumper device provided with FRP member - Google Patents
Vehicle bumper device provided with FRP memberInfo
- Publication number
- JP2726706B2 JP2726706B2 JP18423189A JP18423189A JP2726706B2 JP 2726706 B2 JP2726706 B2 JP 2726706B2 JP 18423189 A JP18423189 A JP 18423189A JP 18423189 A JP18423189 A JP 18423189A JP 2726706 B2 JP2726706 B2 JP 2726706B2
- Authority
- JP
- Japan
- Prior art keywords
- frp member
- frp
- bumper
- vehicle body
- vehicle
- 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 - Lifetime
Links
Description
【発明の詳細な説明】 [産業上の利用分野] 本発明は、衝撃吸収機能をもつFRP部材を備えた車両
用バンパ装置に関する。Description: TECHNICAL FIELD The present invention relates to a vehicle bumper device provided with an FRP member having a shock absorbing function.
[従来の技術] 自動車等の車両に使用されるバンパ装置において、衝
撃吸収性能を高めるための一手段としてFRP部材を使用
することが検討されている。例えば第15図に例示された
先行技術は、車体側の部材1とバンパ本体2との間に、
UないしJ状に成形された曲率半径の小さなFRP部材3
を設けている。FRP部材3の一端3aはボルト等の締結用
部品4によって車体側の部材1に固定され、FRP部材3
の他端3bはピン5とブラケット6によってバンパ本体2
に拘束されている。[Related Art] In a bumper device used for a vehicle such as an automobile, the use of an FRP member as one means for improving shock absorbing performance has been studied. For example, in the prior art illustrated in FIG. 15, between the member 1 on the vehicle body side and the bumper body 2,
FRP member 3 with small radius of curvature formed in U or J shape
Is provided. One end 3a of the FRP member 3 is fixed to the vehicle body-side member 1 by a fastening part 4 such as a bolt.
The other end 3b of the bumper body 2 is
Is bound to.
この種のバンパ装置において、衝突等によりバンパ本
体2に矢印F方向(車体の前後方向)から大荷重が負荷
された時、FRP部材3が撓むことにより衝撃が緩和され
るようになっている。In this type of bumper device, when a large load is applied to the bumper body 2 from the direction of arrow F (the front-rear direction of the vehicle body) due to a collision or the like, the impact is reduced by bending the FRP member 3. .
[発明が解決しようとする課題] 上記バンパ装置において、性能を評価するための各種
試験等を行なったところ、曲率半径が小さくかつばね定
数の大きいFRP部材3が設計通りの荷重−撓み特性およ
び所定のエネルギー吸収性能を発揮できないことがあっ
た。すなわちFRP部材3にF方向の大荷重が負荷された
時に、FRP部材3の撓むが増加するにつれてFRP部材3の
せん断応力(強化繊維に沿う方向の応力)が過剰になっ
て層間せん断破壊が見られたり、あるいはFRP部材3が
所定の撓みに達する前に反力が異常に高まってFRP部材
3の取付部付近や固定用部品等の破損を生じる事例が見
られた。FRP部材3の層間せん断破壊は、FRP部材3の厚
み方向中央部において最も顕著に見られる。[Problems to be Solved by the Invention] In the above-mentioned bumper device, when various tests and the like for evaluating the performance were performed, the FRP member 3 having a small curvature radius and a large spring constant was found to have a load-deflection characteristic as designed and a predetermined value. In some cases could not exhibit the energy absorption performance. That is, when a large load in the F direction is applied to the FRP member 3, as the flexure of the FRP member 3 increases, the shear stress (stress in the direction along the reinforcing fibers) of the FRP member 3 becomes excessive, and interlayer shear fracture occurs. In some cases, the reaction force was abnormally increased before the FRP member 3 reached a predetermined flexure, and the vicinity of the mounting portion of the FRP member 3 and the fixing parts were damaged. Interlaminar shear fracture of the FRP member 3 is most remarkably observed at the center in the thickness direction of the FRP member 3.
上記不具合の原因を調べたところ、FRP部材3の両端3
a,3bがいずれも車幅方向に拘束されていることが大きな
要因になっていることが判った。After examining the cause of the above problem, the 3
It was found that both a and 3b were restrained in the vehicle width direction, which was a major factor.
従って本発明の目的は、衝撃吸収機能をもつFRP部材
が衝突時等に大荷重を受けた時に、本来の衝撃吸収性能
を発揮できるようなFRP部材を備えたバンパ装置を提供
することにある。SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a bumper device provided with an FRP member capable of exhibiting the original shock absorbing performance when the FRP member having a shock absorbing function receives a large load at the time of a collision or the like.
[課題を解決するための手段] 上記目的を果たすために本発明者が開発したバンパ装
置は、略UないしJ状に湾曲した形状に成形されかつ一
端が車体側の部材に連結されるとともに他端がバンパ本
体側に連結されていて車体の前後方向に沿う荷重がバン
パ本体に負荷された時に曲率半径が狭まる方向に撓むFR
P部材と、上記FRP部材とバンパ本体との間またはFRP部
材と車体側の部材との間のうち少なくとも一方に設けら
れていて上記FRP部材が上記方向に撓まされた時にこのF
RP部材が車体の前後方向と交差する方向に変位すること
を許容する横方向変位吸収機構と、を具備している。Means for Solving the Problems A bumper device developed by the present inventor to achieve the above object is formed into a substantially U- or J-shaped curved shape, one end of which is connected to a member on the vehicle body side and the other. FR whose end is connected to the bumper body and which bends in a direction to decrease the radius of curvature when a load along the front-rear direction of the vehicle body is applied to the bumper body
P member, provided between at least one of the FRP member and the bumper body or between the FRP member and the vehicle body side member, when the FRP member is bent in the above direction,
A lateral displacement absorbing mechanism that allows the RP member to be displaced in a direction intersecting the front-rear direction of the vehicle body.
[作用] 衝突等によってバンパ本体に車体の長手方向に沿う荷
重が負荷された時、上記FRP部材はその曲率半径が狭ま
る方向に撓む。FRP部材が上記方向に撓むと、FRP部材の
一部は車体の長手方向と交差する方向にも多少変位す
る。しかして本発明のバンパ装置に使われているFRP部
材は、少なくとも一端側が横方向変位吸収機構によって
車幅方向等に変位可能に支持されているから、FRP部材
に生じる横方向の変位を吸収することができ、FRP部材
が主に曲げ応力で使われるようになる。このためFRP部
材が破損する原因となる過剰なせん断応力等の発生が抑
制され、FRP部材が設計仕様に応じた所定の性能を発揮
できるようになる。[Operation] When a load is applied to the bumper body along the longitudinal direction of the vehicle body due to a collision or the like, the FRP member bends in a direction in which the radius of curvature is reduced. When the FRP member bends in the above direction, a part of the FRP member is slightly displaced also in a direction intersecting the longitudinal direction of the vehicle body. Since the FRP member used in the bumper device of the present invention is supported so that at least one end thereof can be displaced in the vehicle width direction or the like by the lateral displacement absorbing mechanism, the FRP member absorbs the lateral displacement generated in the FRP member. FRP members are mainly used for bending stress. For this reason, the occurrence of excessive shear stress or the like that causes the FRP member to be broken is suppressed, and the FRP member can exhibit predetermined performance according to design specifications.
[実施例] 以下に本発明の第1実施例について第1図ないし第3
図を参照して説明する。第3図に例示されたバンパ装置
10は、バンパ取付ステーを兼ねた左右一対の衝撃吸収用
FRP部材11を備えている。このバンパ装置10は、車体側
の部材の一例としてのサイドメンバ12の端部に固定され
た上記FRP部材11と、このFRP部材11の前面側に配置され
たアマーチャーと呼ばれるバンパ本体13と、このバンパ
本体13を覆う合成樹脂製フェイシャ14などを備えて構成
されている。15はタイヤである。バンパ本体13は、一例
として繊維強化プラスチックからなる成形品であるが、
板金をプレス成形したものであってもかまわない。バン
パ本体13の裏面側に、FRP部材11側に突出する左右一対
の凸部16が一体的に設けられている。[Embodiment] FIGS. 1 to 3 show a first embodiment of the present invention.
This will be described with reference to the drawings. Bumper device illustrated in FIG.
10 is a pair of left and right shock absorbers that also serve as bumper mounting stays
An FRP member 11 is provided. The bumper device 10 includes an FRP member 11 fixed to an end of a side member 12 as an example of a vehicle-side member, a bumper body 13 called an armature disposed on a front side of the FRP member 11, and A synthetic resin fascia 14 that covers the bumper body 13 and the like are provided. 15 is a tire. The bumper body 13 is a molded product made of fiber reinforced plastic as an example,
Press-formed sheet metal may be used. A pair of left and right convex portions 16 protruding toward the FRP member 11 is integrally provided on the rear surface side of the bumper main body 13.
FRP部材11は、長手方向に沿う一方向強化繊維20(一
部のみ図示)と周知のマトリックス樹脂21とにより略U
ないしJ状に成形されている。FRP部材11の曲率半径は
一例として60mm前後である。一方向強化繊維20にはガラ
ス繊維束が用いられるが、場合によっては炭素繊維束や
有機繊維束が使用されてもよい。FRP部材11の一端すな
わち車体側取付端11aは、ボルト等の締結用部品22によ
ってサイドメンバ12に固定される。The FRP member 11 is substantially U-shaped by a unidirectional reinforcing fiber 20 (only a part is shown) along a longitudinal direction and a well-known matrix resin 21.
Or J-shaped. The radius of curvature of the FRP member 11 is, for example, about 60 mm. Although a glass fiber bundle is used for the unidirectional reinforcing fibers 20, a carbon fiber bundle or an organic fiber bundle may be used in some cases. One end of the FRP member 11, that is, the vehicle-body-side mounting end 11a is fixed to the side member 12 by a fastening part 22 such as a bolt.
FRP部材11は、曲率半径が減少する方向、すなわち車
体の前後方向(長手方向)に沿う荷重Fを受けるように
して使われる。一例として、2個のFRP部材11,11で車重
1300kg,車速8km/時のエネルギー328kgmを50mmのストロ
ークで吸収させるのに必要な1個のFRP部材11のばね定
数kは130kgf/mmときわめて大きいものである。The FRP member 11 is used so as to receive a load F along the direction in which the radius of curvature decreases, that is, the longitudinal direction of the vehicle body. As an example, two FRP members 11, 11
The spring constant k of one FRP member 11 required to absorb 328 kgm of energy at a vehicle speed of 8 km / h at 1300 kg with a stroke of 50 mm is as large as 130 kgf / mm.
FRP部材11の他端すなわち自由端11bに、横方向変位吸
収機構30を介してバンパ本体13が取付けられている。横
方向変位吸収機構30は、第2図に示されるように側面方
向から見てコ字状断面をなす金属プレート製ホルダ31
と、このホルダ31の内面とFRP部材11との間に圧入され
たゴム状弾性体からなる摩擦部材32と、ホルダ31とバン
パ本体13に取付けるためのピンあるいはボルトからなる
連結用部品33,34等を備えて構成されている。ホルダ31
の近傍において、FRP部材11の前面側にバンパ本体13の
凸部16の先端16aが当接させられている。FRP部材11はバ
ンパ本体13をサイドメンバ12に取付けるためのステーも
兼ねている。A bumper main body 13 is attached to the other end of the FRP member 11, that is, a free end 11b via a lateral displacement absorbing mechanism 30. As shown in FIG. 2, the lateral displacement absorbing mechanism 30 has a metal plate holder 31 having a U-shaped cross section when viewed from the side.
And a friction member 32 made of a rubber-like elastic body press-fitted between the inner surface of the holder 31 and the FRP member 11, and coupling parts 33 and 34 made of pins or bolts for attaching to the holder 31 and the bumper body 13. And the like. Holder 31
, The front end 16a of the convex portion 16 of the bumper body 13 is in contact with the front side of the FRP member 11. The FRP member 11 also serves as a stay for attaching the bumper body 13 to the side member 12.
次に上記構成のバンパ装置10の作用について説明す
る。Next, the operation of the bumper device 10 having the above configuration will be described.
通常の使用状態(非衝突時)において、バンパ本体13
はFRP部材11とホルダ31および摩擦部材32を介して所定
位置に拘束されているから、バンパ本体13が不用意に動
いてしまうようなことはない。Under normal use conditions (non-collision), the bumper body 13
Is restrained at a predetermined position via the FRP member 11, the holder 31, and the friction member 32, so that the bumper body 13 does not move carelessly.
衝突等によってバンパ本体13に大きな荷重Fが負荷さ
れた場合、凸部16と連結用部品33,34等を介してFRP部材
11を前方から撓ませる力が入力される。この力によって
FRP部材11は曲率半径が狭まる方向に撓み、一方向強化
繊維20とマトリックス樹脂21とが協働してエネルギーを
蓄える。FRP部材11の車体側取付端11aはサイドメンバ12
に剛に固定されているため、FRP部材11が上記方向に撓
むと、FRP部材11の自由端11b側が車幅方向にある程度変
位しようとする。そしてこの方向の変位は横方向変位吸
収機構30によって吸収される。すなわちFRP部材11は摩
擦部材32を介してホルダ31に対し車幅方向に相対移動可
能であるため、FRP部材11の上記方向への変位が許容さ
れる。従ってFRP部材11は主に車体の長手方向の曲げを
受けるようになり、層間せん断破壊の原因になるような
強化繊維20に沿う方向の応力の発生を抑制できる。When a large load F is applied to the bumper body 13 due to a collision or the like, the FRP member is connected to the bumper body 13 via the projection 16 and the connecting parts 33 and 34.
The force to bend 11 from the front is input. By this force
The FRP member 11 bends in a direction in which the radius of curvature is reduced, and the unidirectional reinforcing fibers 20 and the matrix resin 21 cooperate to store energy. The vehicle body side mounting end 11a of the FRP member 11 is a side member 12
When the FRP member 11 bends in the above direction, the free end 11b of the FRP member 11 tends to be displaced to some extent in the vehicle width direction. The displacement in this direction is absorbed by the lateral displacement absorbing mechanism 30. That is, since the FRP member 11 is relatively movable in the vehicle width direction with respect to the holder 31 via the friction member 32, the displacement of the FRP member 11 in the above direction is allowed. Therefore, the FRP member 11 is mainly subjected to bending in the longitudinal direction of the vehicle body, and it is possible to suppress the generation of stress in the direction along the reinforcing fibers 20 that causes interlayer shear failure.
第4図と第5図は本発明の第2実施例を示している。
この実施例の横方向変位吸収機構30は、FRP部材11の自
由端11b側をロ状に閉じた形状のホルダ40で抱えこみ、
このホルダ40をボルト等の連結用部品41によってバンパ
本体13側に引寄せ締付けることにより、バンパ本体13と
FRP部材11とを連結している。FRP部材11の他端すなわち
固定端側は、第1実施例と同様にボルト等の固定用部品
を用いて車体側の部材(サイドメンバ等)に固定され
る。この第2実施例も、FRP部材11が車体の長手方向に
撓む時、FRP部材11の自由端11b側が車幅方向に変位する
ことを許容できる。なお、ホルダ40とFRP部材11との間
に、第1実施例で述べたと同様の摩擦部材32が介在され
てもよい。4 and 5 show a second embodiment of the present invention.
The lateral displacement absorbing mechanism 30 of this embodiment is held by the holder 40 having a shape in which the free end 11b side of the FRP member 11 is closed in a B shape,
The holder 40 is drawn toward the bumper body 13 by a connecting part 41 such as a bolt, and is tightened.
The FRP member 11 is connected. The other end, that is, the fixed end side, of the FRP member 11 is fixed to a member (side member or the like) on the vehicle body side using fixing parts such as bolts, similarly to the first embodiment. Also in the second embodiment, when the FRP member 11 bends in the longitudinal direction of the vehicle body, the free end 11b side of the FRP member 11 can be allowed to be displaced in the vehicle width direction. Note that a friction member 32 similar to that described in the first embodiment may be interposed between the holder 40 and the FRP member 11.
第6図と第7図は本発明の第3実施例を示している。
この実施例では、FRP部材11の自由端11b側を、バンパ本
体13の凸部16とホルダ45との間で挟み付けることによっ
て、バンパ本体13に対する取付けを行なっている。ホル
ダ45にはピン状の部品またはボルト、あるいはバンパ本
体13の一部等が利用される。FRP部材11の固定端側は、
第1実施例と同様に車体側の部材に固定される。なお、
FRP部材11と凸部16との間、およびFRP部材11とホルダ45
との間に、第1実施例で述べたと同様の摩擦部材32が介
在させられてもよい。6 and 7 show a third embodiment of the present invention.
In this embodiment, the FRP member 11 is attached to the bumper body 13 by sandwiching the free end 11b side between the protrusion 16 of the bumper body 13 and the holder 45. For the holder 45, a pin-shaped component or a bolt, a part of the bumper body 13, or the like is used. The fixed end side of the FRP member 11
It is fixed to a member on the vehicle body side as in the first embodiment. In addition,
Between the FRP member 11 and the convex portion 16, and between the FRP member 11 and the holder 45
Between them, a friction member 32 similar to that described in the first embodiment may be interposed.
第8図に示された本発明の第4実施例においては、FR
P部材11の車体側取付端11aに横方向変位吸収機構30を設
けることにより、取付端11aが車幅方向に変位できるよ
うにしている。すなわちこの実施例は、FRP部材11の取
付端11aを金属プレート製のホルダ50によって抱え込
み、このホルダ50をボルト等の固定用部品51によってサ
イドメンバ12に固定している。そしてホルダ50とFRP部
材11との間に、ゴム状弾性体からなる摩擦部材32が圧入
されている。FRP部材11の他端側は、従来品と同様にピ
ンとブラケット等によってバンパ本体13に拘束するか、
あるいは第1〜第3実施例と同様の横方向変位吸収機構
30を介して取付ける。この第4実施例の場合、FRP部材1
1が車体の長手方向に撓む時にFRP部材11の一部に生じる
車幅方向の変位が、摩擦部材32を介してホルダ50と取付
端11aとの間で吸収される。このため前記各実施例と同
様に、FRP部材11に主に曲げ応力で働くようになり、FRP
部材11の破壊の原因となるような過剰なせん断応力の発
生を抑制できる。In the fourth embodiment of the present invention shown in FIG.
By providing a lateral displacement absorbing mechanism 30 at the vehicle body side mounting end 11a of the P member 11, the mounting end 11a can be displaced in the vehicle width direction. That is, in this embodiment, the mounting end 11a of the FRP member 11 is held by a metal plate holder 50, and the holder 50 is fixed to the side member 12 by a fixing part 51 such as a bolt. A friction member 32 made of a rubber-like elastic body is press-fitted between the holder 50 and the FRP member 11. The other end side of the FRP member 11 is restricted to the bumper body 13 by pins and brackets as in the conventional product,
Alternatively, a lateral displacement absorbing mechanism similar to the first to third embodiments.
Install via 30. In the case of the fourth embodiment, the FRP member 1
The displacement in the vehicle width direction that occurs in a part of the FRP member 11 when the member 1 is bent in the longitudinal direction of the vehicle body is absorbed between the holder 50 and the mounting end 11a via the friction member 32. For this reason, as in each of the above embodiments, the FRP member 11 mainly acts on the bending stress, and the FRP
It is possible to suppress the occurrence of excessive shear stress that may cause the member 11 to break.
第9図に示された第5実施例の横方向変位吸収機構30
は、バンパ本体13に車幅方向の長孔53を設けるととも
に、FRP部材11の自由端11bに設けられたピン54を長孔53
に嵌合させることにより、FRP部材11が前後方向に撓ん
だ時に自由端11bが車幅方向にも変位できるようになっ
ている。ピン54はプレート55によってFRP部材11に固定
されている。The lateral displacement absorbing mechanism 30 of the fifth embodiment shown in FIG.
Is provided with a long hole 53 in the vehicle width direction in the bumper body 13 and a pin 54 provided at the free end 11b of the FRP member 11 with the long hole 53.
The free end 11b can also be displaced in the vehicle width direction when the FRP member 11 bends in the front-rear direction. The pin 54 is fixed to the FRP member 11 by a plate 55.
なお上記長孔53を設ける代りに、長さlにわたる部位
56を他の部位よりも薄肉とし、衝突時にピン54がこの薄
肉部位56を破壊しつつl方向に動いて横方向の変位が吸
収するうよにしてもよい。こうすれば、FRP部材11の自
由端11bとバンパ本体13との相対位置を確実に規制で
き、取付け「ガタ」の発生を防ぐ上でも効果的である。It should be noted that, instead of providing the long hole 53, a portion extending over a length l
The portion 56 may be made thinner than the other portions, and the pin 54 may move in the 1 direction while breaking the thin portion 56 at the time of collision to absorb the lateral displacement. By doing so, the relative position between the free end 11b of the FRP member 11 and the bumper main body 13 can be reliably regulated, which is effective in preventing the occurrence of "play" in the mounting.
また、第10図に示された第6実施例のように、ピン54
をFRP部材11の厚み方向の前面側に位置させることによ
り、ピン54を介してFRP部材11を曲げる荷重が負荷され
た時にプレート55が変形しにくくしてもよい。Also, as in the sixth embodiment shown in FIG.
May be positioned on the front side in the thickness direction of the FRP member 11 so that the plate 55 is less likely to be deformed when a load for bending the FRP member 11 is applied via the pin 54.
第11図ないし第13図は本発明の第7実施例を示す。こ
の実施例は、FRP部材11の車体側取付端11aが車体の前後
方向にある程度傾くことができるようにスペーサ59を介
してサイドメンバ12に取付け、しかもFRP部材11とサイ
ドメンバ12との間に補助衝撃吸収体60を介在させてい
る。補助衝撃吸収体60は金属あるいはFRP製のパイプ等
からなる。第12図に示されるようにFRP部材11に荷重F
が負荷されると、FRP部材11の取付端11aが後方に反りな
がらある程度傾くことによって自由端11bの車幅方向へ
の変位が吸収されるとともに、補助衝撃吸収体60がFRP
部材11とサイドメンバ12との間に挟まれて圧潰される。
このため第13図に示されるような荷重−変位特性が発揮
され、衝撃エネルギーの一部を効果的に吸収できる。FIG. 11 to FIG. 13 show a seventh embodiment of the present invention. In this embodiment, the FRP member 11 is mounted on the side member 12 via the spacer 59 so that the vehicle body side mounting end 11a of the FRP member 11 can be inclined to some extent in the front-rear direction of the vehicle body, and between the FRP member 11 and the side member 12. An auxiliary shock absorber 60 is interposed. The auxiliary shock absorber 60 is made of a metal or FRP pipe or the like. As shown in FIG. 12, a load F is applied to the FRP member 11.
When the FRP member 11 is loaded, the mounting end 11a of the FRP member 11 warps backward and tilts to some extent, thereby absorbing the displacement of the free end 11b in the vehicle width direction, and the auxiliary shock absorber 60
It is crushed by being sandwiched between the member 11 and the side member 12.
Therefore, load-displacement characteristics as shown in FIG. 13 are exhibited, and a part of impact energy can be effectively absorbed.
第14図に示された第8実施例は、FRP部材11の車体側
取付端11aとサイドメンバ12との間にエラストマからな
る弾性スペーサ61を介在させることにより、FRP部材11
の取付端11aが車体前後方向にある程度傾くことができ
るようになっている。この場合、荷重FによってFRP部
材11が撓まされた時に、取付端11aが弾性スペーサ61側
にある程度傾くことにより、自由端11bの車幅方向への
変位が吸収される。The eighth embodiment shown in FIG. 14 is different from the eighth embodiment in that an elastic spacer 61 made of an elastomer is interposed between the vehicle body side mounting end 11a of the FRP member 11 and the side member 12.
The mounting end 11a can be inclined to some extent in the vehicle longitudinal direction. In this case, when the FRP member 11 is bent by the load F, the displacement of the free end 11b in the vehicle width direction is absorbed by the mounting end 11a being inclined to the elastic spacer 61 side to some extent.
なおFRP部材11を取付ける向き等の具体的態様は上記
実施例以外であってもよい。例えば、FRP部材11の両端1
1a,11bのうち少なくとも一方が車体の上下方向に変位で
きるような向きでFRP部材11が取付けられてもよい。The specific mode such as the mounting direction of the FRP member 11 may be other than the above embodiment. For example, both ends 1 of the FRP member 11
The FRP member 11 may be attached in such a direction that at least one of 1a and 11b can be displaced in the vertical direction of the vehicle body.
[発明の効果] 本発明によれば、車体とバンパ本体との間に介在され
ている曲率半径の小さなFRP部材に衝突等による大荷重
が負荷された時に、このFRP部材に曲げ応力以外の過剰
な応力が発生することを抑制でき、FRP部材に所定の衝
撃吸収性能を発揮させることができる。[Effects of the Invention] According to the present invention, when a large load due to a collision or the like is applied to an FRP member having a small radius of curvature interposed between a vehicle body and a bumper main body, excessive force other than bending stress is applied to the FRP member. It is possible to suppress the occurrence of a large stress and to make the FRP member exhibit a predetermined shock absorbing performance.
第1図は本発明の第1実施例を示すバンパ装置の一部の
斜視図、第2図は第1図に示されたバンパ装置の縦断面
図、第3図は第1図に示されたバンパ装置の平面図、第
4図は本発明の第2実施例を示すバンパ装置の一部の斜
視図、第5図は第4図に示されたバンパ装置の縦断面
図、第6図は本発明の第3実施例を示すバンパ装置の一
部の斜視図、第7図は第6図に示されたバンパ装置の縦
断面図、第8図は本発明の第4実施例を示すバンパ装置
の一部の斜視図、第9図は本発明の第5実施例を示すバ
ンパ装置の一部の平面図、第10図は本発明の第6実施例
を示すバンパ装置の一部の平面図、第11図は本発明の第
7実施例を示すバンパ装置の一部の平面図、第12図は第
11図に示されたバンパ装置の衝撃吸収時の様子を示す平
面図、第13図は第11図に示されたバンパ装置の衝撃吸収
特性を示す図、第14図は本発明の第8実施例を示すバン
パ装置の一部の平面図、第15図は従来のバンパ装置を示
す平面図である。 10…バンパ装置、11…FRP部材、12…サイドメンバ(車
体側の部材)、13…バンパ本体、30…横方向変位吸収機
構、31…ホルダ、32…摩擦部材、40,45,50…ホルダ、60
…補助衝撃吸収体。FIG. 1 is a perspective view of a part of a bumper device showing a first embodiment of the present invention, FIG. 2 is a longitudinal sectional view of the bumper device shown in FIG. 1, and FIG. 3 is shown in FIG. FIG. 4 is a plan view of a bumper device shown in FIG. 4, FIG. 4 is a perspective view of a part of the bumper device showing a second embodiment of the present invention, FIG. 5 is a longitudinal sectional view of the bumper device shown in FIG. Is a perspective view of a part of a bumper device showing a third embodiment of the present invention, FIG. 7 is a longitudinal sectional view of the bumper device shown in FIG. 6, and FIG. 8 shows a fourth embodiment of the present invention. FIG. 9 is a perspective view of a part of a bumper device, FIG. 9 is a plan view of a part of a bumper device showing a fifth embodiment of the present invention, and FIG. 10 is a part of a bumper device showing a sixth embodiment of the present invention. FIG. 11 is a plan view of a part of a bumper device showing a seventh embodiment of the present invention, and FIG.
FIG. 11 is a plan view showing the state of the bumper device shown in FIG. 11 when absorbing shock, FIG. 13 is a diagram showing the shock absorption characteristics of the bumper device shown in FIG. 11, and FIG. 14 is an eighth embodiment of the present invention. FIG. 15 is a plan view showing a part of a bumper device showing an example, and FIG. 15 is a plan view showing a conventional bumper device. 10 bumper device, 11 FRP member, 12 side member (body side member), 13 bumper body, 30 lateral displacement absorption mechanism, 31 holder, 32 friction member, 40, 45, 50 holder , 60
... Auxiliary shock absorber.
Claims (3)
かつ一端が車体側の部材に連結されるとともに他端がパ
ンパ本体側に連結されていて車体の前後方向に沿う荷重
がパンパ本体に負荷された時に曲率半径が狭まる方向に
撓むFRP部材と、 上記FRP部材と上記バンパ本体との間またはFRP部材と車
体側の部材との間のうち少なくとも一方に設けられてい
て上記FRP部材が上記方向に撓まされた時にこのFRP部材
が車体の前後方向と交差する方向に変位することを許容
する横方向変位吸収機構と、を具備したことを特徴とす
るFRP部材を備えた車両用バンパ装置。1. A body which is formed in a substantially U or J curved shape and has one end connected to a member on the vehicle body side and the other end connected to the body of the pamper, so that a load along the front-rear direction of the car body is reduced. A FRP member that bends in a direction in which the radius of curvature is reduced when loaded on the FRP member, and the FRP member is provided on at least one of between the FRP member and the bumper body or between the FRP member and a vehicle body-side member. A lateral displacement absorbing mechanism that allows the FRP member to be displaced in a direction intersecting the front-rear direction of the vehicle body when the FRP member is deflected in the above direction, for a vehicle equipped with an FRP member. Bumper equipment.
またはバンパ本体側に取着されて上記FRP部材の端部を
車体の前後方向と交差する方向に移動可能に保持するホ
ルダと、このホルダとFRP部材との間に介在させられた
ゴム状弾性体からなる摩擦部材とを含んでいる請求項1
記載のFRP部材を備えた車両用バンパ装置。2. A holder mounted on a vehicle body-side member or a bumper body and holding an end of the FRP member so as to be movable in a direction intersecting the front-rear direction of the vehicle body. 2. A friction member comprising a rubber-like elastic body interposed between the holder and the FRP member.
A vehicle bumper device provided with the FRP member described in the above.
部材が車体の前後方向に沿う荷重により撓んだ時に圧潰
することによって衝突エネルギーを吸収する補助衝撃吸
収体が設けられている請求項1記載のFRP部材を備えた
車両用バンパ装置。3. An FRP is provided between the FRP member and a member on the vehicle body side.
2. A vehicle bumper device having an FRP member according to claim 1, further comprising an auxiliary shock absorber that absorbs collision energy by crushing the member when the member is bent by a load along the front-rear direction of the vehicle body.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18423189A JP2726706B2 (en) | 1989-07-17 | 1989-07-17 | Vehicle bumper device provided with FRP member |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18423189A JP2726706B2 (en) | 1989-07-17 | 1989-07-17 | Vehicle bumper device provided with FRP member |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0350049A JPH0350049A (en) | 1991-03-04 |
JP2726706B2 true JP2726706B2 (en) | 1998-03-11 |
Family
ID=16149670
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP18423189A Expired - Lifetime JP2726706B2 (en) | 1989-07-17 | 1989-07-17 | Vehicle bumper device provided with FRP member |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2726706B2 (en) |
-
1989
- 1989-07-17 JP JP18423189A patent/JP2726706B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH0350049A (en) | 1991-03-04 |
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