JP2004106759A - Mounting device for bumper - Google Patents

Mounting device for bumper Download PDF

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Publication number
JP2004106759A
JP2004106759A JP2002273918A JP2002273918A JP2004106759A JP 2004106759 A JP2004106759 A JP 2004106759A JP 2002273918 A JP2002273918 A JP 2002273918A JP 2002273918 A JP2002273918 A JP 2002273918A JP 2004106759 A JP2004106759 A JP 2004106759A
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JP
Japan
Prior art keywords
bumper
mounting
mounting bracket
section
bumpers
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
Application number
JP2002273918A
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Japanese (ja)
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JP4425534B2 (en
Inventor
Kenji Toyoda
豊田　賢司
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Press Kogyo Co Ltd
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Press Kogyo Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
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Priority to JP2002273918A priority Critical patent/JP4425534B2/en
Publication of JP2004106759A publication Critical patent/JP2004106759A/en
Application granted granted Critical
Publication of JP4425534B2 publication Critical patent/JP4425534B2/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a mounting device for a bumper and the like equipped with a mounting bracket capable of alleviating stress concentration and complimenting strength. <P>SOLUTION: Upon mounting a bumper 11 having a closed cross section on a tip end 2a of a supporting arm 2 supporting a frame F, a mounting bracket 12 having a U-shaped cross section and trapezoidal in plan view upon mounting is used, an opening part 12a of the U-shaped cross section is covered and fixed on the bumper 11, and the top part 12b of the trapezoid is mounted on the tip end 2a of the supporting arm 2. The stress concentration upon collision is alleviated by the mounting bracket 12 trapezoidal in plan view, bending of the bumper 11 and the mounting bracket 12 is prevented, and the strength of the bumper 11 is complemented by covering the bumper 11 with the opening part 12a of the trapezoidal mounting bracket 12. <P>COPYRIGHT: (C)2004,JPO

Description

【０００１】
【発明の属する技術分野】
本発明は、バンパ類、特にＦＵＰ（フレーム下潜り込み防止部材）のフレームへの取付装置に関する。
【０００２】
【従来の技術】
前記ＦＵＰ（Ｆｒｏｎｔ　Ｕｎｄｅｒｒｕｎ　Ｐｒｏｔｅｃｔｉｏｎ）は、大型トラックへの乗用車等の追突時に、該乗用車等が大型トラックの下に潜り込んで大事故につながることを防止しようとする一種のバンパである。
【０００３】
ＦＵＰは現在研究中であるが、多くは角形又は円形の閉断面をなし、内部に補強部材を内蔵して衝突時の圧潰に対応しようとしている。そして、該ＦＵＰは図１の１で示すように、トラックのフレームＦに支持した支持腕２の先端に、後記取付ブラケットを介して取付けられる予定である。
【０００４】
前記取付ブラケットとしては、一例としてリヤバンパ等でも使用されていた図５以下に示すごときものを使用することが考えられている。即ちこの取付ブラケット３は、コ字状に形成された本体部３ａの両端にフランジ部３ｂを一体に形成した、厚さ４．５〜６ミリメートルの鋼板部材で、上記フランジ部３ｂを前記ＦＵＰ１’の裏面の所定位置に溶接Ｗで固着し、前記本体部３ａを、ボルト穴３ｃに通したボルト（図示せず）により前記支持腕２の先端に固定したものである。
【０００５】
ところが、上記のようなブラケット３では、図６のＡ−Ａ断面とＢ−Ｂ断面における断面係数の差が例えば約１対２と大きいため、厳しい荷重条件下での衝撃力Ｐ１によって本体部３ａとフランジ部３ｂとの境界に相当するＱ点に応力集中が生じ、図７に示すようにＱ点でＦＵＰ１’とともに屈曲することがあり、ブラケット３がＦＵＰ１’を補強する効果が十分発揮されないおそれがある。
【０００６】
また図８に示すように、衝撃力Ｐ１によってＦＵＰ１が屈曲するとともに、ブラケット３が潰れてしまうことがある。そして、前記ブラケット３の補強効果を期待せず、ＦＵＰ１自体に必要剛性を持たせようとしてその全長にわたり内部に補強を施すことも考えられるが、これでは大きな重量増加に繋がりやすい。
【０００７】
【発明が解決しようとする課題】
よって、本発明の解決しようとする課題は、応力集中を緩和でき且つバンパ類の強度を補完する取付ブラケットを備えた、バンパ類の取付装置を提供することにある。
【０００８】
【課題を解決するための手段】
上記課題を解決するための本発明バンパ類の取付装置は、閉断面をもつバンパ類を、フレームに支持した支持腕先端に取付けるに際し、取付時の平面視で台形をなすコ字断面の取付ブラケットを用い、前記コ字断面の開口部をフレーム側から前記バンパ類に被せて固定するとともに、台形の頂部を前記支持腕の先端に取付けたことを特徴とするものである。
【０００９】
【発明の実施の形態】
本発明の好ましい実施の形態を、図１乃至図４により説明すると、本発明バンパ類の取付装置は、閉断面をもつバンパ類１１を、フレームＦに支持した支持腕２先端２ａに取付けるに際し、取付時の平面視で台形をなすコ字断面の取付ブラケット１２を用い、前記コ字断面の開口部１２ａをフレームＦ側から前記バンパ類１１に被せて固定するとともに、台形の頂部１２ｂを前記支持腕２の先端２ａに取付けたものである。
【００１０】
図１乃至図４に示す実施例について更に詳細に説明する。
図に示す取付ブラケット１２は、全体として台形で、開口部１２ａを形成するコ字形断面に形成されており、その中央に頂部１２ｂが形成されている。該頂部１２ｂにはボルト穴１２ｃが形成され、該穴１２ｃに合わせて頂部１２ｂの内側にナット１３が固着されている。
【００１１】
コ字形断面の深さは、バンパ類（ＦＵＰ）１の上下面の厚さの、例えば１／２とする。また、ＦＵＰ１１が図４の如く左右端付近で屈曲したものでは、屈曲位置のところで切断すればよい。更に負荷または荷重条件によっては、図２、図３の仮想線の如くリブ片１４を取付ブラケット１２内面に合わせて形成してもよい。
【００１２】
上記のように形成した取付ブラケット１２は、所定位置において、前記開口部１２ａをフレームＦ側から前記ＦＵＰ１１にかぶせて溶接等Ｗで固定し、次いで左右両側にブラケット１２を取付けたＦＵＰ１１を前記支持腕２の先端２ａにボルト（図示せず）で固着する。
【００１３】
このように構成した本発明取付装置において、ＦＵＰ１１に衝撃荷重Ｐ１がかかったときは、その荷重は断面変化が緩やかな取付ブラケット１２を経て、頂部１２ｂから前記支持腕２の先端に伝達される。従って、応力集中を生ずることなしに荷重は支持腕２を介してフレームＦに円滑に伝達される。
【００１４】
【発明の効果】
本発明バンパ類の取付装置は、閉断面をもつバンパ類を、フレームに支持した支持腕先端に取付けるに際し、取付時の平面視で台形をなすコ字断面の取付ブラケットを用い、前記コ字断面の開口部をフレーム側から前記バンパ類に被せて固定するとともに、台形の頂部を前記支持腕の先端に取付けたことを特徴とするので、取付時の平面視で台形をなす取付ブラケットにより衝突時の応力集中を緩和して、バンパ類、取付ブラケットの屈曲等を防ぐことができる。
【００１５】
また、台形の取付ブラケットを、その開口部をフレーム側から前記バンパ類に被せて固定したことにより、バンパ類の強度を補完する効果もある。実験によれば、上記補完効果によって取付ブラケットの板厚を１ランク下のものとすることができた。
【図面の簡単な説明】
【図１】本発明バンパ類の取付装置の斜視図
【図２】本発明バンパ類の取付装置の要部の斜視図
【図３】本発明バンパ類の取付装置の要部の平面図
【図４】本発明バンパ類の取付装置の変形例を示す要部の平面図
【図５】従来のバンパ類の取付装置の要部の斜視図
【図６】従来のバンパ類の取付装置の要部の平面図
【図７】従来のバンパ類の取付装置の要部の荷重による変形例を示す平面図
【図８】従来のバンパ類の取付装置の要部の荷重による他の変形例を示す平面図。
【符号の説明】
１、１１　ＦＵＰ、バンパ類　　２　支持腕　　２ａ　（支持腕の）先端
３、１２　取付ブラケット　　１２ａ　（取付ブラケットの）開口部
１２ｂ　（同）頂部　　１２ｃ　（同）ボルト穴　　１３　ナット
１４　リブ片　　Ｆ　フレーム。[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a device for mounting bumpers, particularly, a FUP (frame lowering prevention member) to a frame.
[0002]
[Prior art]
The FUP ( Front Underrun Protection ) is a type of bumper that prevents a passenger car or the like from slipping under a large truck and leading to a major accident when the passenger car or the like collides with a large truck.
[0003]
Although FUPs are currently under study, many have a square or circular closed cross-section and incorporate a reinforcing member inside to cope with crushing in the event of a collision. The FUP is to be mounted to the tip of a support arm 2 supported on a frame F of a truck via a mounting bracket described later, as shown in FIG .
[0004]
As the mounting bracket, for example , a mounting bracket shown in FIG. 5 or the like which has been used in a rear bumper or the like has been considered. That this mounting bracket 3, to form the flange portion 3b integrally with both ends of the main body 3a formed in a U-shape, steel plate member having a thickness of 4.5 to 6 mm, wherein the flange portion 3b FUP1 ' The main body 3a is fixed to the end of the support arm 2 by a bolt (not shown) passed through a bolt hole 3c.
[0005]
However, in the bracket 3 as described above, since the difference in section modulus between the section AA and the section BB in FIG. 6 is large, for example, about 1: 2, the main body 3a is subjected to the impact force P1 under severe load conditions. and stress concentration occurs in the Q point corresponding to the boundary between the flange portion 3b, 'may be bent together, the bracket 3 is FUP1' FUP1 point Q as shown in FIG. 7 possibility that the effect of reinforcing the can not be sufficiently exhibited There is .
[0006]
Further, as shown in FIG. 8, the FUP1 may be bent by the impact force P1, and the bracket 3 may be crushed. Then, without expecting the reinforcing effect of the bracket 3, it is conceivable to reinforce the FUP 1 itself to have necessary rigidity throughout its entire length, but this easily leads to a large weight increase.
[0007]
[Problems to be solved by the invention]
Therefore, an object of the present invention is to provide a mounting device for bumpers, which includes a mounting bracket that can reduce stress concentration and complement the strength of bumpers.
[0008]
[Means for Solving the Problems]
In order to solve the above problems, the present invention provides a bumper mounting device, which is used for mounting a bumper having a closed cross section to the tip of a support arm supported by a frame. And fixing the cover having the U-shaped cross section by covering the bumpers from the frame side, and attaching the top of a trapezoid to the tip of the support arm.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
A preferred embodiment of the present invention will be described with reference to FIGS. 1 to 4. The mounting apparatus for bumpers of the present invention mounts a bumper 11 having a closed cross section on a tip 2 a of a support arm 2 supported on a frame F. Using a mounting bracket 12 having a U-shaped cross section in a trapezoidal shape in a plan view at the time of mounting, the opening 12a having the U-shaped cross section is fixed to the bumpers 11 from the frame F side, and the top 12b of the trapezoid is supported. It is attached to the tip 2 a of the arm 2.
[0010]
The embodiment shown in FIGS. 1 to 4 will be described in more detail.
The mounting bracket 12 shown in the figure has a trapezoidal shape as a whole, is formed in a U-shaped cross section forming an opening 12a, and a top portion 12b is formed in the center thereof. A bolt hole 12c is formed in the top portion 12b, and a nut 13 is fixed inside the top portion 12b in accordance with the hole 12c.
[0011]
The depth of the U-shaped cross section is, for example, １ ／ of the thickness of the upper and lower surfaces of the bumper (FUP) 1. Further, when the FUP 11 is bent near the left and right ends as shown in FIG. 4, the FUP 11 may be cut at the bending position. Further, depending on the load or the load condition, the rib piece 14 may be formed in accordance with the inner surface of the mounting bracket 12 as shown by the imaginary line in FIGS.
[0012]
The mounting bracket 12 formed as described above, at a predetermined position, covers the opening 12a from the frame F side to the FUP 11 and fixes the opening 12a by welding or the like W, and then attaches the FUP 11 with the bracket 12 mounted on both left and right sides to the supporting arm. 2 is fixed to the tip 2a with bolts (not shown).
[0013]
In the mounting device of the present invention configured as described above, when an impact load P1 is applied to the FUP 11, the load is transmitted from the top portion 12b to the tip of the support arm 2 via the mounting bracket 12 having a gradual cross section change. Therefore, the load is smoothly transmitted to the frame F via the support arm 2 without causing stress concentration.
[0014]
【The invention's effect】
The mounting device for bumpers of the present invention, when mounting bumpers having a closed cross section to the tip of a support arm supported by a frame, uses a mounting bracket having a U-shaped cross section that is trapezoidal in plan view at the time of mounting. And the top of the trapezoid is attached to the tip of the support arm. , And the bending of the bumpers and the mounting bracket can be prevented.
[0015]
In addition, by fixing the trapezoidal mounting bracket by covering the opening thereof with the bumpers from the frame side, there is also an effect of complementing the strength of the bumpers. According to the experiment, the thickness of the mounting bracket can be reduced by one rank due to the above-mentioned complementary effect.
[Brief description of the drawings]
FIG. 1 is a perspective view of a mounting device for bumpers of the present invention. FIG. 2 is a perspective view of a main part of a mounting device for bumpers of the present invention. FIG. 3 is a plan view of a main portion of a mounting device for bumpers of the present invention. 4 is a plan view of a main part showing a modification of the bumper mounting device of the present invention. FIG. 5 is a perspective view of a main part of a conventional bumper mounting device. FIG. 6 is a main part of a conventional bumper mounting device. FIG. 7 is a plan view showing a modified example of a main part of a conventional bumper mounting apparatus due to a load. FIG. 8 is a plan view showing another modified example of a main part of a conventional bumper mounting apparatus due to a load. FIG.
[Explanation of symbols]
1, 11 FUP, bumpers 2 Support arm 2a Tip 3 (of support arm) 12, Mounting bracket 12a Opening 12b (of mounting bracket) Top 12c (same) Bolt hole 13 Nut 14 Rib piece F frame.

Claims (2)

閉断面をもつバンパ類を、フレームに支持した支持腕先端に取付けるに際し、取付時の平面視で台形をなすコ字断面の取付ブラケットを用い、前記コ字断面の開口部をフレーム側から前記バンパ類に被せて固定するとともに、台形の頂部を前記支持腕の先端に取付けたことを特徴とするバンパ類の取付装置。When mounting the bumpers having a closed cross section to the tip of the support arm supported by the frame, use a mounting bracket having a U-shaped cross section that is trapezoidal in plan view at the time of mounting. And a trapezoidal top is attached to a tip of the support arm, the bumper being attached to the support arm. 前記取付ブラケットが内部に補強用リブを有することを特徴とする請求項１記載のバンパ類の取付装置。The mounting device according to claim 1, wherein the mounting bracket has a reinforcing rib inside.
JP2002273918A 2002-09-19 2002-09-19 Bumper mounting device Expired - Lifetime JP4425534B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2002273918A JP4425534B2 (en) 2002-09-19 2002-09-19 Bumper mounting device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2002273918A JP4425534B2 (en) 2002-09-19 2002-09-19 Bumper mounting device

Publications (2)

Publication Number Publication Date
JP2004106759A true JP2004106759A (en) 2004-04-08
JP4425534B2 JP4425534B2 (en) 2010-03-03

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
JP2002273918A Expired - Lifetime JP4425534B2 (en) 2002-09-19 2002-09-19 Bumper mounting device

Country Status (1)

Country Link
JP (1) JP4425534B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006036071A (en) * 2004-07-28 2006-02-09 Press Kogyo Co Ltd Front under run protector
JP2014004963A (en) * 2012-06-26 2014-01-16 Honda Motor Co Ltd Bumper structure
JP2015044571A (en) * 2013-07-31 2015-03-12 アイシン軽金属株式会社 Stay member for underrun protector, and connection structure for the same

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103738286A (en) * 2013-12-25 2014-04-23 中国重汽集团柳州运力专用汽车有限公司 Vehicle rear protective guard

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006036071A (en) * 2004-07-28 2006-02-09 Press Kogyo Co Ltd Front under run protector
JP2014004963A (en) * 2012-06-26 2014-01-16 Honda Motor Co Ltd Bumper structure
JP2015044571A (en) * 2013-07-31 2015-03-12 アイシン軽金属株式会社 Stay member for underrun protector, and connection structure for the same

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