JP5390829B2 - Bumper device for vehicle - Google Patents

Bumper device for vehicle Download PDF

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Publication number
JP5390829B2
JP5390829B2 JP2008274244A JP2008274244A JP5390829B2 JP 5390829 B2 JP5390829 B2 JP 5390829B2 JP 2008274244 A JP2008274244 A JP 2008274244A JP 2008274244 A JP2008274244 A JP 2008274244A JP 5390829 B2 JP5390829 B2 JP 5390829B2
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Prior art keywords
surface portion
back surface
bumper
vehicle
groove
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JP2010100190A (en
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真一 羽田
順 正保
恭一 北
環 大林
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Aisin Keikinzoku Co Ltd
Aisin Corp
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Aisin Seiki Co Ltd
Aisin Keikinzoku Co Ltd
Aisin Corp
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Description

本発明は、金属板を筒状に成形したバンパー本体を設けて構成してある車両用バンパー装置に関する。   The present invention relates to a vehicular bumper device that is configured by providing a bumper body in which a metal plate is formed into a cylindrical shape.

従来、この種の車両用バンパー装置としては、例えば、所定断面形状の筒体（例えば、特許文献１参照）となるように帯板を幅方向に折り曲げて成形し、突き合わせた端縁部どうしを溶接で接合して、筒状のバンパー本体が形成されていた。また、そのバンパー本体を、高周波焼入れ等の方法で強化することもあった。
前記筒体の所定断面形状とは、例えば、円形や楕円形や矩形や、それらを組合せた形状であった。 Conventionally, as this type of vehicle bumper device, for example, a band plate is bent in a width direction so as to form a cylindrical body having a predetermined cross-sectional shape (for example, refer to Patent Document 1), and the end edges that are abutted are formed. Joined by welding, a cylindrical bumper body was formed. In addition, the bumper body may be strengthened by a method such as induction hardening.
The predetermined cross-sectional shape of the cylindrical body is, for example, a circular shape, an elliptical shape, a rectangular shape, or a combination thereof.

特開２００６−２４０４４１号公報（図１５，図１６）Japanese Patent Laying-Open No. 2006-240441 (FIGS. 15 and 16)

上述した従来の車両用バンパー装置によれば、例えば、縦長の矩形断面形状の場合、バンパー本体の表面部から外力が作用した場合に、上下中間部分の平面部から容易に変形し易い。
この変形を抑制するには、図８に示すように、表面部２の上下中間部にリブ２０を形成したり、図９に示すように、二つの角筒２１を上下に並設して溶接で一体化することが考えられる。
しかし、上述の表面部２にリブ２０を形成するものにおいては、例えば、高周波焼入れ等の強化方法を採用する場合、上下二ヵ所に環状断面部分が分離していることから、加熱時の磁束が一方の環状断面部に集まり易く、全体を焼入れ出来ない問題があり、強化方法の選択の自由度が低い欠点がある。
一方、二つの角筒２１を接続するものにおいては、溶接の手間が掛かり、且つ、角筒２１どうしの重なり部分は、金属板が二枚重ねになり、材料コストが嵩むと共に、重量も増加し、取扱性が悪いという欠点がある。 According to the above-described conventional vehicle bumper device, for example, in the case of a vertically long rectangular cross-sectional shape, when an external force is applied from the surface portion of the bumper body, it is easily deformed from the flat portion of the upper and lower intermediate portions.
In order to suppress this deformation, as shown in FIG. 8, ribs 20 are formed in the upper and lower intermediate portions of the surface portion 2, or, as shown in FIG. It is conceivable to integrate them.
However, in the case where the rib 20 is formed on the surface portion 2 described above, for example, when adopting a strengthening method such as induction hardening, the annular cross-sections are separated in two upper and lower portions. There is a problem that it is easy to gather in one annular cross section, the whole cannot be quenched, and there is a disadvantage that the degree of freedom in selecting a strengthening method is low.
On the other hand, in the case where two rectangular tubes 21 are connected, it takes time and effort for welding, and the overlapping portions of the rectangular tubes 21 are made of two metal plates, which increases the material cost and the weight. There is a disadvantage that the nature is bad.

従って、本発明の目的は、上記問題点を解消し、高強度で、且つ、強化方法の選択の自由度が高い車両用バンパー装置を、経済的に、効率よく形成できるようにするところにある。   Accordingly, an object of the present invention is to solve the above-mentioned problems and to make it possible to economically and efficiently form a vehicular bumper device having high strength and a high degree of freedom in selecting a strengthening method. .

本発明の第１の特徴構成は、金属板を筒状に成形したバンパー本体を設け、前記バンパー本体における車体側に面する裏面部と、前記裏面部とは反対側に位置する表面部とに、複数条の凹溝部がそれぞれ形成してあり、前記表面部の各凹溝部及び前記裏面部の各凹溝部どうしは、当接しない状態に、且つ、前記表面部と前記裏面部との対向方向に少なくともその一部が重なる状態に配置してあり、前記表面部側から外力が作用した場合に、前記表面部は前記裏面部側に撓み変形し、前記表面部の各凹溝部の底部分が前記裏面部の各凹溝部の底部分に当接可能にしてあるところにある。 A first characteristic configuration of the present invention includes a bumper body formed by forming a metal plate into a cylindrical shape, and a back surface portion facing the vehicle body side in the bumper body, and a surface portion located on the opposite side to the back surface portion. , recessed grooves of plural rows is Yes formed respectively, each groove portions each other in the groove portion and the back portion of the surface portion, in a state that does not abut, and the opposing direction of the back portion and the surface portion at least a Ri partially disposed in a state overlapping tare, when an external force from the surface side is applied, the surface region is deformed into the back surface side, a bottom portion of each groove portion of the surface portion Is in contact with the bottom of each concave groove on the back surface .

本発明の第１の特徴構成によれば、表面部と裏面部とに、それぞれ凹溝部を形成してあるから、バンパー本体の断面二次モーメントを、単なる縦長矩形断面のバンパー本体に比べて、より大きくすることができ、バンパー本体の全体とした強度アップを図ることが可能となる。
また、特に、バンパー本体の弱軸周りの断面二次モーメントの増加を図り易いから、バンパー本体の表面部に対向方向から作用する外力に対する耐力の向上を図ることができる。
しかも、表面部の凹溝部と裏面部の凹溝部とは、当接しない状態に、且つ、表面部と裏面部との対向方向に少なくともその一部が重なる状態に配置してあるから、外力の作用に伴って前記表面部が裏面部側に撓み変形した場合、表面部の凹溝部の底部分が、裏面部の凹溝部の底部分に当接し、裏面部において表面部からの力を受け止めることができる。
従って、両底部分が当接するまでの外力作用の当初においては、表面部の撓み変形によって衝撃吸収を図りながら、両底部分が当接した後は、裏面部においても外力を受け止めて、より強力に外力支持を叶えることができる。
一方、バンパー本体の断面形状としては、表面部の凹溝部及び裏面部の凹溝部どうしは当接しない状態に形成してあるから、全体として一つの環状の断面を構成することができる。従って、例えば、強化方法として高周波焼入れを採用しても、断面全体を容易に加熱して強化を図ることができる。勿論、他の焼入れ法にも対応することができ、強化方法を選択する上での自由性が高い。
また、一枚の金属帯板を曲げ加工によって筒形状に形成することも可能であるから、端縁部どうしの一ヵ所の溶接のみでバンパー本体を形成でき、従来のように、二つの筒部材を溶接によって一体化する場合に比べて、溶接手間の軽減によって生産効率の向上を図れると共に、コストダウンをも図ることが可能となる。 According to the first characteristic configuration of the present invention, since the groove portion is formed on each of the front surface portion and the back surface portion, the sectional moment of inertia of the bumper main body is compared with a bumper main body having a simple vertical rectangular cross section. Therefore, the overall strength of the bumper body can be increased.
In particular, since it is easy to increase the secondary moment of inertia around the weak axis of the bumper body, it is possible to improve the proof strength against external forces acting on the surface portion of the bumper body from the opposite direction.
In addition, the concave groove portion on the front surface portion and the concave groove portion on the back surface portion are arranged so that they do not come into contact with each other and at least part of them overlap in the facing direction of the front surface portion and the back surface portion. When the front surface portion is bent and deformed to the back surface side in accordance with the action, the bottom portion of the concave groove portion of the front surface portion comes into contact with the bottom portion of the concave groove portion of the back surface portion and receives the force from the front surface portion at the back surface portion. Can do.
Therefore, at the beginning of the external force action until both bottom parts abut, while absorbing the impact by bending deformation of the front surface part, after the both bottom parts abut, the back surface part also receives the external force and is stronger. Can support external force.
On the other hand, as the cross-sectional shape of the bumper body, the concave groove portion on the front surface portion and the concave groove portion on the back surface portion are not in contact with each other, so that one annular cross section can be formed as a whole. Therefore, for example, even if induction hardening is employed as the strengthening method, the entire cross section can be easily heated and strengthened. Of course, other quenching methods can be used, and the flexibility in selecting the strengthening method is high.
In addition, since it is possible to form a single metal strip into a cylindrical shape by bending, the bumper body can be formed only by welding at one location between the end edges. Compared with the case of integrating by welding, it is possible to improve the production efficiency and reduce the cost by reducing the time required for welding.

本発明の第２の特徴構成は、前記表面部と前記裏面部との対向方向に位置する前記凹溝部どうしは、その対向方向にすべてが重なる状態に配置してあるところにある。   The 2nd characteristic structure of this invention exists in the place which has arrange | positioned the said ditch | groove part located in the opposing direction of the said surface part and the said back surface part so that all may overlap in the opposing direction.

本発明の第２の特徴構成によれば、外力の作用に伴って前記表面部が裏面部側に撓み変形した場合、表面部の凹溝部の底部分が、裏面部の凹溝部の底部分全域に当接し、同一の作用線上での力の伝達が図られ、裏面部において表面部からの力をより強力に受け止めることができる。
従って、バンパー本体の強度アップを、より強力に図ることができる。 According to the second characteristic configuration of the present invention, when the surface portion is bent and deformed toward the back surface side due to the action of an external force, the bottom portion of the groove portion of the surface portion is the entire bottom portion of the groove portion of the back surface portion. , The transmission of force on the same line of action is achieved, and the force from the front surface portion can be received more strongly on the back surface portion.
Therefore, the strength of the bumper body can be increased more strongly.

本発明の第３の特徴構成は、前記バンパー本体の前記凹溝部が形成してある部分の断面形状は、前記表面部と前記裏面部とが、表裏対称形状であるところにある。   According to a third characteristic configuration of the present invention, a cross-sectional shape of a portion of the bumper body where the concave groove is formed is that the front surface and the back surface are symmetrical.

本発明の第３の特徴構成によれば、当該バンパー本体の成形時に、金属製帯板を折り曲げながら、当該形状に加工する際、表裏対称形状にすることで、表面部と裏面部との折り曲げ工程を同時に実施して工程を単純化することができる。
その結果、バンパー本体の成形作業効率を向上させることができ、コストダウンを図ることができる。 According to the third characteristic configuration of the present invention, when the bumper body is formed, the metal strip is bent, and when it is processed into the shape, the front and back sides are bent so that the front and back portions are bent. The process can be performed simultaneously to simplify the process.
As a result, it is possible to improve the molding work efficiency of the bumper body and to reduce the cost.

以下に本発明の実施の形態を図面に基づいて説明する。   Embodiments of the present invention will be described below with reference to the drawings.

図１は、本発明の車両用バンパー装置の一実施形態品の横断面を示すもので、当該車両用バンパー装置Ｂは、図には示さないが、長尺に形成してあり、車両の前面と後面とにそれぞれ横配置にして取付部を介して取り付けられている。   FIG. 1 shows a cross section of one embodiment of the vehicle bumper device of the present invention. The vehicle bumper device B is not shown in the figure, but is formed in a long shape, and the front surface of the vehicle. And the rear surface thereof are arranged in a horizontal manner via attachment portions.

前記車両用バンパー装置Ｂは、金属板を筒状に成形したバンパー本体１を設けて構成してある。
バンパー本体１の基本の横断面形状は、全長にわたって同一で、縦長の矩形筒形状に形成してある。
また、バンパー本体１における車体側に面する裏面部３と、前記裏面部３とは反対側に位置する表面部２とに、凹溝部４がそれぞれ形成してある。
前記表面部２と前記裏面部３の凹溝部４ａ及び前記裏面部の凹溝部４ｂどうしは、当接しない状態に、且つ、前記表面部２と前記裏面部３とが、表裏対称形状となる状態に形成してある。
具体的には、素材となる金属帯板の幅方向の所定個所を折り曲げして加工し、最終的に、両方の側縁部どうしを突きあわせて溶接によって一体化を図ってある。当該バンパー本体１は表裏対称形状に形成してあるから、表面部２と裏面部３との折り曲げ工程を同時に実施して工程を単純化できる。その結果、バンパー本体の成形作業効率を向上させることができ、コストダウンを図ることができる。
また、突合せ部は、当該実施形態においては、バンパー本体１の横断面形状の上面部分に位置している。 The vehicle bumper device B is configured by providing a bumper body 1 in which a metal plate is formed into a cylindrical shape.
The basic cross-sectional shape of the bumper body 1 is the same over the entire length and is formed in a vertically long rectangular tube shape.
In addition, a recessed groove portion 4 is formed in a back surface portion 3 facing the vehicle body side in the bumper body 1 and a surface portion 2 located on the opposite side to the back surface portion 3.
The surface portion 2 and the groove portion 4a of the back surface portion 3 and the groove portion 4b of the back surface portion are not in contact with each other, and the surface portion 2 and the back surface portion 3 are in a symmetrical shape. Is formed.
Specifically, a predetermined portion in the width direction of the metal strip as a raw material is bent and processed, and finally, both side edge portions are brought into contact with each other and integrated by welding. Since the bumper body 1 is formed in a front-back symmetrical shape, the process can be simplified by simultaneously performing the folding process of the front surface portion 2 and the back surface portion 3. As a result, it is possible to improve the molding work efficiency of the bumper body and to reduce the cost.
Moreover, the butting | matching part is located in the upper surface part of the cross-sectional shape of the bumper main body 1 in the said embodiment.

当該実施形態のバンパー装置Ｂに、表面部２側から外力が作用した場合、表面部２に凹溝部４ａを形成してあることで、平板のみで構成されているものに比べて断面二次モーメントが大きくなり、変形し難い。
また、外力が大きい場合、表面部２は裏面側に撓み変形するものの、凹溝部４ａの底部分４ａａが、裏面部３の凹溝部４ｂの底部分４ｂａに当接し、裏面部３において表面部３からの力を受け止めることができる。
従って、両底部分４ａａ，４ｂａが当接するまでの外力作用の当初においては、表面部２の撓み変形によって衝撃吸収を図りながら、両底部分４ａａ，４ｂａが当接した後は、裏面部３においても外力を受け止めて、より強力に外力支持を叶えることができる。
また、バンパー本体１の断面形状としては、表面部２の凹溝部４ａ及び裏面部３の凹溝部４ｂどうしは当接しない状態に形成してあるから、全体として一つの環状の断面を構成することができる。従って、例えば、強化方法として高周波焼入れを採用しても、断面全体を容易に加熱して強化を図ることができる。勿論、他の焼入れ法にも対応することができ、強化方法を選択する上での自由性が高い。 When an external force is applied to the bumper device B according to the embodiment from the surface portion 2 side, the groove portion 4a is formed on the surface portion 2, so that the secondary moment of section is larger than that of a flat plate alone. Is large and difficult to deform.
Further, when the external force is large, the front surface portion 2 bends and deforms on the back surface side, but the bottom portion 4aa of the groove portion 4a contacts the bottom portion 4ba of the groove portion 4b of the back surface portion 3, and the surface portion 3 on the back surface portion 3 Can receive the power from.
Therefore, at the beginning of the external force action until the both bottom portions 4aa and 4ba come into contact with each other, the bottom portion 4aa and 4ba come into contact with each other while the bottom portion 4aa and 4ba come into contact with each other while absorbing the impact by bending deformation of the surface portion 2. Can also accept external force and achieve external force support more powerfully.
Moreover, as the cross-sectional shape of the bumper main body 1, the concave groove portion 4 a of the front surface portion 2 and the concave groove portion 4 b of the back surface portion 3 are formed so as not to contact each other. Can do. Therefore, for example, even if induction hardening is employed as the strengthening method, the entire cross section can be easily heated and strengthened. Of course, other quenching methods can be used, and the flexibility in selecting the strengthening method is high.

〔別実施形態〕
以下に他の実施の形態を説明する。 [Another embodiment]
Other embodiments will be described below.

〈１〉 バンパー本体１は、先の実施形態で説明した断面形状に限るものではなく、例えば、凹溝部４の数に関しては、一条に限らず、図２、図３に示すように、二条、三条、又は、四条以上の複数条であってもよい。
また、表面部２の凹溝部４ａと、裏面部３の凹溝部４ｂとの対向方向視における双方の配置は、先の実施形態で説明したように、総てが重なる状態に配置してあるものに限らず、例えば、図４に示すように、同じ巾寸法の凹溝部４が、上下に位置ズレして、一部が重なる状態であってもよい。
また、図５に示すように、表裏の凹溝部４ａ，４ｂの巾寸法を異ならせて、それら凹溝部４の一部が重なる状態に配置してあってもよい。
また、図６に示すように、表裏の凹溝部４ａ，４ｂの深さ寸法を異ならせて形成してあってもよい。
また、バンパー本体１の基本断面形状は、先の実施形態で説明したように、縦長の矩形形状に限るものではなく、例えば、図７に示すように、円形形状部を備えた形状であってもよい。 <1> The bumper body 1 is not limited to the cross-sectional shape described in the previous embodiment. For example, the number of the groove portions 4 is not limited to one, but as shown in FIGS. It may be three or four or more.
In addition, as described in the previous embodiment, both the arrangement of the concave groove portion 4a of the front surface portion 2 and the concave groove portion 4b of the back surface portion 3 in the opposite direction view are arranged so as to overlap each other. For example, as shown in FIG. 4, the groove 4 having the same width may be displaced vertically and partly overlapped.
Moreover, as shown in FIG. 5, you may arrange | position so that the width dimension of the groove parts 4a and 4b of front and back may differ and a part of these groove parts 4 may overlap.
Moreover, as shown in FIG. 6, you may form by varying the depth dimension of the groove parts 4a and 4b of the front and back.
Further, the basic cross-sectional shape of the bumper main body 1 is not limited to a vertically long rectangular shape as described in the previous embodiment, and is, for example, a shape having a circular shape portion as shown in FIG. Also good.

〈２〉 前記バンパー本体１は、全長にわたって同一の断面形状であることに限らず、部分的に異なる断面形状となるように形成してあってもよい。 <2> The bumper body 1 is not limited to the same cross-sectional shape over the entire length, and may be formed to have partially different cross-sectional shapes.

尚、上述のように、図面との対照を便利にするために符号を記したが、該記入により本発明は添付図面の構成に限定されるものではない。また、本発明の要旨を逸脱しない範囲において、種々なる態様で実施し得ることは勿論である。   In addition, as mentioned above, although the code | symbol was written in order to make contrast with drawing convenient, this invention is not limited to the structure of an accompanying drawing by this entry. In addition, it goes without saying that the present invention can be carried out in various modes without departing from the gist of the present invention.

バンパー本体を示す模式断面図Schematic sectional view showing the bumper body 別実施形態のバンパー本体を示す模式断面図Schematic sectional view showing the bumper body of another embodiment 別実施形態のバンパー本体を示す模式断面図Schematic sectional view showing the bumper body of another embodiment 別実施形態のバンパー本体を示す模式断面図Schematic sectional view showing the bumper body of another embodiment 別実施形態のバンパー本体を示す模式断面図Schematic sectional view showing the bumper body of another embodiment 別実施形態のバンパー本体を示す模式断面図Schematic sectional view showing the bumper body of another embodiment 別実施形態のバンパー本体を示す模式断面図Schematic sectional view showing the bumper body of another embodiment 従来例のバンパー本体を示す模式断面図Schematic sectional view showing the bumper body of the conventional example 従来例のバンパー本体を示す模式断面図Schematic sectional view showing the bumper body of the conventional example

１ バンパー本体
２ 表面部
３ 裏面部
４ 凹溝部
４ａ 表面部の凹溝部
４ｂ 裏面部の凹溝部 DESCRIPTION OF SYMBOLS 1 Bumper main body 2 Front surface part 3 Back surface part 4 Concave groove part 4a Concave groove part of front surface part 4b Concave groove part of back surface part

Claims (3)

金属板を筒状に成形したバンパー本体を設け、
前記バンパー本体における車体側に面する裏面部と、前記裏面部とは反対側に位置する表面部とに、複数条の凹溝部がそれぞれ形成してあり、
前記表面部の各凹溝部及び前記裏面部の各凹溝部どうしは、当接しない状態に、且つ、前記表面部と前記裏面部との対向方向に少なくともその一部が重なる状態に配置してあり、
前記表面部側から外力が作用した場合に、前記表面部は前記裏面部側に撓み変形し、前記表面部の各凹溝部の底部分が前記裏面部の各凹溝部の底部分に当接可能にしてある車両用バンパー装置。 A bumper body is formed by molding a metal plate into a cylindrical shape.
A plurality of grooves are formed on the back surface portion facing the vehicle body side of the bumper body and on the surface portion located on the opposite side of the back surface portion, respectively.
Each groove portions each other in the groove portion and the back portion of the surface portion, in a state that does not abut, and were placed in a state where at least a part overlaps the opposing direction between the back surface and the surface portion Thea The
When an external force is applied from the surface portion side, the surface portion bends and deforms toward the back surface portion, and the bottom portion of each groove portion on the surface portion can contact the bottom portion of each groove portion on the back surface portion. A bumper device for a vehicle. 前記表面部と前記裏面部との対向方向に位置する前記凹溝部どうしは、その対向方向にすべてが重なる状態に配置してある請求項１に記載の車両用バンパー装置。   2. The vehicle bumper device according to claim 1, wherein the concave groove portions positioned in a facing direction between the front surface portion and the back surface portion are arranged so as to overlap each other in the facing direction. 前記バンパー本体の前記凹溝部が形成してある部分の断面形状は、前記表面部と前記裏面部とが、表裏対称形状である請求項１又は２に記載の車両用バンパー装置。   3. The vehicle bumper device according to claim 1, wherein a cross-sectional shape of a portion of the bumper main body where the concave groove portion is formed is such that the front surface portion and the rear surface portion are front and back symmetrical.
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JPS5950860U (en) * 1982-09-28 1984-04-04 新神戸電機株式会社 Synthetic resin bumper
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