JP2009204051A

JP2009204051A - Member joining structure

Info

Publication number: JP2009204051A
Application number: JP2008045816A
Authority: JP
Inventors: Takeshi Moriyama; 剛森山
Original assignee: Toyota Motor Corp
Current assignee: Toyota Motor Corp
Priority date: 2008-02-27
Filing date: 2008-02-27
Publication date: 2009-09-10

Abstract

PROBLEM TO BE SOLVED: To provide a member joining structure capable of improving a joint strength between joined members. SOLUTION: In the member joining structure 10, when joining a rocker 14 and a floor panel 18 respectively made of FRP, the neutral axis A1 of the rocker 14 coincides with the neutral axis A2 of the floor panel 18. Accordingly, even if the load F1 of an occupant vertically acts on the central portion of the floor panel 18, for example, bending moments M1, M2 acting on the ends of an adhesive 20 can be reduced. Since stress generated at the ends of the adhesive 20 can be reduced, it is possible to improve the joint strength between the rocker 14 and the floor panel 18. COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、第一被接合部材及び第二被接合部材を接合させる部材接合構造に関する。 The present invention relates to a member joining structure for joining a first joined member and a second joined member.

従来、この種の部材接合構造としては、次のものが知られている（例えば、特許文献１〜特許文献３参照）。 Conventionally, the following is known as this kind of member joining structure (for example, refer to patent documents 1-3).

例えば、特許文献１に記載の例では、ブラケット本体を構成する第１平板部材と第２平板部材とが重合した状態で接合されており、ブラケット本体の断面２次モーメントの中立軸が第１平板部材と第２平板部材との重合面上に設定されている。 For example, in the example described in Patent Document 1, the first flat plate member and the second flat plate member constituting the bracket main body are joined in a superposed state, and the neutral axis of the sectional secondary moment of the bracket main body is the first flat plate. It is set on the overlapping surface of the member and the second flat plate member.

また、特許文献２に記載の例では、フロントピラーにフロントルーフレールブレースが接合されると共に、ピラーアウタにヒンジブレースが接合されたフロントピラー構造において、フロントピラーの断面の中立軸が上下方向になだらかに連続されている。 Further, in the example described in Patent Document 2, in the front pillar structure in which the front roof rail brace is joined to the front pillar and the hinge brace is joined to the pillar outer, the neutral axis of the front pillar cross section is gently continuous in the vertical direction. Has been.

さらに、特許文献３に記載の例では、一対の金属プレートの互いの突起を接合して構成された中空パネルにおいて、突起同士の接合によって生じる歪の中心が両金属プレートの断面の中立軸に一致されている。
特開平１０−２３６２３６号公報特開平１０−１６７１１３号公報特開２００３−２８３１５１号公報 Furthermore, in the example described in Patent Document 3, in the hollow panel configured by joining the protrusions of the pair of metal plates, the center of the strain generated by the joint of the protrusions coincides with the neutral axis of the cross section of both metal plates. Has been.
JP-A-10-236236 JP-A-10-167113 JP 2003-283151 A

しかしながら、上記各特許文献に記載の例では、複数の被接合部材により構成された構造体の剛性や強度等を確保できるものの、被接合部材間の接合強度を向上させるためには改善の余地がある。 However, in the examples described in each of the above patent documents, although the rigidity and strength of the structure constituted by a plurality of members to be bonded can be secured, there is room for improvement in order to improve the bonding strength between the members to be bonded. is there.

本発明は、上記課題に鑑みてなされたものであって、その目的は、被接合部材間の接合強度を向上させることができる部材接合構造を提供することにある。 This invention is made | formed in view of the said subject, The objective is to provide the member joining structure which can improve the joining strength between to-be-joined members.

前記課題を解決するために、請求項１に記載の部材接合構造は、第一被接合部材の中立軸と第二被接合部材の中立軸とを一致させた状態で、前記第一被接合部材及び前記第二被接合部材を接合させたことを特徴とする。 In order to solve the above-described problem, the member joining structure according to claim 1 is configured such that the neutral shaft of the first member to be joined and the neutral shaft of the second member to be joined coincide with each other. And the second member to be joined is joined.

請求項１に記載の部材接合構造によれば、第一被接合部材及び第二被接合部材を接合させる際に、第一被接合部材の中立軸と第二被接合部材の中立軸とを一致させている。従って、例えば、第一被接合部材及び第二被接合部材の一方における接合部から離間した位置に接合部の接合方向と平行な方向に荷重が作用した場合でも、接合部の端部に作用する曲げモーメントを小さくすることができる。これにより、接合部の端部に生じる応力を小さくできるので、被接合部材間の接合強度を向上させることができる。 According to the member joining structure of Claim 1, when joining the 1st to-be-joined member and the 2nd to-be-joined member, the neutral axis of the 1st to-be-joined member and the neutral axis of the 2nd to-be-joined member correspond. I am letting. Therefore, for example, even when a load acts in a direction parallel to the joining direction of the joining portion at a position separated from the joining portion in one of the first joined member and the second joined member, it acts on the end portion of the joining portion. The bending moment can be reduced. Thereby, since the stress which arises in the edge part of a junction part can be made small, the joint strength between to-be-joined members can be improved.

なお、請求項２に記載の部材接合構造のように、第一被接合部材及び第二被接合部材がそれぞれＦＲＰにより形成されたロッカ及びフロアパネルとされ、ロッカの端部とフロアパネルの端部とが互いに重ね合わされた状態で接着剤により接合されていると好適である。 As in the member joining structure according to claim 2, the first joined member and the second joined member are a rocker and a floor panel formed by FRP, respectively, and the end of the rocker and the end of the floor panel Are preferably joined by an adhesive in a state where they are superimposed on each other.

以上詳述したように、本発明によれば、被接合部材間の接合強度を向上させることができる。 As described above in detail, according to the present invention, the bonding strength between the members to be bonded can be improved.

以下、図面を参照しながら、本発明の部材接合構造を車両の車体に適用した例について説明する。 Hereinafter, an example in which the member joining structure of the present invention is applied to a vehicle body will be described with reference to the drawings.

図１には、本発明の一実施形態に係る部材接合構造１０が適用された車両の車体１２が正面断面図にて示されており、図２には、図１に示される車体１２の要部が拡大されて示されている。なお、これらの図において示される矢印ＵＰ、矢印ＯＵＴは、車両上下方向上側、車両幅方向外側をそれぞれ示している。 FIG. 1 is a front cross-sectional view of a vehicle body 12 to which a member joining structure 10 according to an embodiment of the present invention is applied. FIG. 2 shows a main part of the vehicle body 12 shown in FIG. The part is shown enlarged. In these figures, an arrow UP and an arrow OUT indicate an upper side in the vehicle vertical direction and an outer side in the vehicle width direction, respectively.

これらの図に示されるように、この車両の車体１２では、車両幅方向外側に一対のロッカ１４が配置されている。また、車両幅方向中央部には、センタートンネル部材１６が配置されており、この一対のロッカ１４とセンタートンネル部材１６との間には、フロアパネル１８がそれぞれ配置されている。このロッカ１４、センタートンネル部材１６、フロアパネル１８は、いずれもＣＦＲＰにより形成されている。 As shown in these drawings, in the vehicle body 12 of this vehicle, a pair of rockers 14 are disposed on the outer side in the vehicle width direction. Further, a center tunnel member 16 is disposed at the center in the vehicle width direction, and a floor panel 18 is disposed between the pair of rockers 14 and the center tunnel member 16. The rocker 14, the center tunnel member 16, and the floor panel 18 are all formed of CFRP.

ロッカ１４には、車両幅方向内側に向けてフランジ状の端部１４Ａが形成されており、センタートンネル部材１６には、同様に、車両幅方向外側に向けてフランジ状の端部１６Ａが形成されている。 The rocker 14 is formed with a flange-shaped end portion 14A toward the inner side in the vehicle width direction, and the center tunnel member 16 is similarly formed with a flange-shaped end portion 16A toward the outer side in the vehicle width direction. ing.

そして、この車体１２では、図２に示されるように、ロッカ１４の中立軸Ａ１とフロアパネル１８の中立軸Ａ２とを一致させた状態で、ロッカ１４の端部１４Ａとフロアパネル１８の車両幅方向外側の端部１８Ａとが互いに重ね合わされた状態で接着剤２０により接着されている。 In the vehicle body 12, as shown in FIG. 2, the vehicle width of the end portion 14A of the rocker 14 and the vehicle width of the floor panel 18 in a state where the neutral shaft A1 of the rocker 14 and the neutral shaft A2 of the floor panel 18 are aligned. It is adhered by the adhesive 20 in a state where the end 18A on the outer side in the direction is overlapped with each other.

また、拡大図にて図示していないが、この車体１２では、上記と同様に、センタートンネル部材１６の中立軸とフロアパネル１８の中立軸とを一致させた状態で、センタートンネル部材１６の端部１６Ａとフロアパネル１８の車両幅方向内側の端部１８Ｂとが互いに重ね合わされた状態で接着剤２２により接着されている（図１参照）。 Although not shown in the enlarged view, in the vehicle body 12, the end of the center tunnel member 16 is aligned with the neutral axis of the center tunnel member 16 and the neutral axis of the floor panel 18 in the same manner as described above. The portion 16A and the end 18B of the floor panel 18 on the inner side in the vehicle width direction are bonded to each other with the adhesive 22 in a state of being overlapped with each other (see FIG. 1).

なお、ここでいう中立軸とは、部材断面の図心（中心点）を断面の法線方向に連続的に繋ぎ合わせた軸のことである。 Here, the neutral axis is an axis obtained by continuously connecting centroids (center points) of member cross sections in the normal direction of the cross section.

また、中立軸が一致するとは、例えば、図４（Ａ）〜図４（Ｄ）に示される例を参考に説明すれば、第一被接合部材Ａ及び第二被接合部材Ｂの各断面を法線方向から見たときに第一被接合部材Ａの中立軸ａ１と第一被接合部材Ａの中立軸ａ２とが互いに重なる状態のことである。なお、図４（Ａ）〜図４（Ｄ）における符合Ｃは、第一被接合部材Ａ及び第二被接合部材Ｂを接着する接着剤である。 Moreover, if a neutral axis corresponds, for example, if it demonstrates with reference to the example shown by FIG. 4 (A)-FIG. 4 (D), each cross section of the 1st to-be-joined member A and the 2nd to-be-joined member B will be described. When viewed from the normal direction, the neutral shaft a1 of the first member to be bonded A and the neutral shaft a2 of the first member to be bonded A overlap each other. In addition, the code | symbol C in FIG. 4 (A)-FIG. 4 (D) is the adhesive agent which adhere | attaches the 1st to-be-joined member A and the 2nd to-be-joined member B. FIG.

そして、本発明の一実施形態に係る部材接合構造１０によれば、以下の特有な効果を奏する。 And according to member joining structure 10 concerning one embodiment of the present invention, the following special effects are produced.

すなわち、本発明の一実施形態に係る部材接合構造１０が適用された車両の車体１２において、図１に示されるように、フロアパネル１８の中央部に対して乗員の荷重Ｆ１が垂直に作用した場合には、図３に示されるように、例えば、ロッカ１４とフロアパネル１８に変形が生じる。 That is, in the vehicle body 12 to which the member joining structure 10 according to an embodiment of the present invention is applied, as shown in FIG. 1, the occupant's load F1 acts perpendicularly to the center portion of the floor panel 18. In this case, as shown in FIG. 3, for example, the rocker 14 and the floor panel 18 are deformed.

また、このときには、図２に示されるように、フロアパネル１８の端部１８Ａに対し車両幅方向内側に引っ張り荷重Ｆ２が作用し、ロッカ１４の端部１４Ａには車両幅方向外側に反力として荷重Ｆ３が作用する。そして、これにより、接着剤２０の端部に剥離方向に曲げモーメントＭ１，Ｍ２が発生する。 Further, at this time, as shown in FIG. 2, a tensile load F2 acts on the end portion 18A of the floor panel 18 in the vehicle width direction inner side, and the end portion 14A of the rocker 14 acts as a reaction force on the outer side in the vehicle width direction. The load F3 acts. As a result, bending moments M 1 and M 2 are generated in the peeling direction at the end of the adhesive 20.

ここで、仮にロッカ１４とフロアパネル１８が金属により形成された場合には、ロッカ１４とフロアパネル１８が塑性変形するので、接着剤２０の端部に生じる曲げモーメントＭ１，Ｍ２による応力は小さくなる。 Here, if the rocker 14 and the floor panel 18 are formed of metal, the rocker 14 and the floor panel 18 are plastically deformed, so that the stress due to the bending moments M1 and M2 generated at the end of the adhesive 20 is reduced. .

一方、ロッカ１４とフロアパネル１８がいずれもＣＦＲＰにより形成された場合には、ＣＦＲＰは曲げ剛性が金属に比して大きいので、ロッカ１４とフロアパネル１８が塑性変形せず、接着剤２０の端部に生じる曲げモーメントＭ１，Ｍ２による応力が大きくなり接着剤２０が破壊しやすくなる。 On the other hand, when both the rocker 14 and the floor panel 18 are formed of CFRP, the bending stiffness of CFRP is larger than that of metal, so the rocker 14 and the floor panel 18 are not plastically deformed, and the end of the adhesive 20 The stress due to the bending moments M1 and M2 generated in the portion increases and the adhesive 20 is easily broken.

ところが、本発明の一実施形態に係る部材接合構造１０では、それぞれＣＦＲＰにより形成されたロッカ１４及びフロアパネル１８を接合させる際に、ロッカ１４の中立軸Ａ１とフロアパネル１８の中立軸Ａ２とを一致させている。 However, in the member joining structure 10 according to one embodiment of the present invention, when the rocker 14 and the floor panel 18 formed by CFRP are joined, the rocker 14 neutral axis A1 and the floor panel 18 neutral axis A2 are connected. Match.

従って、例えば、フロアパネル１８の中央部に対して乗員の荷重Ｆ１が垂直に作用した場合でも、接着剤２０の端部に作用する曲げモーメントＭ１，Ｍ２を小さくすることができる。これにより、接着剤２０の端部に生じる応力を小さくできるので、ロッカ１４及びフロアパネル１８間の接着強度を向上させることができる。 Therefore, for example, even when the passenger's load F1 acts perpendicularly to the center portion of the floor panel 18, the bending moments M1, M2 acting on the end portion of the adhesive 20 can be reduced. Thereby, since the stress which arises in the edge part of the adhesive agent 20 can be made small, the adhesive strength between the rocker 14 and the floor panel 18 can be improved.

ここで、本発明の一実施形態に係る部材接合構造１０と、比較例に係る部材接合構造１１０とを比較し、本発明の一実施形態に係る部材接合構造１０が奏する効果をより明確にする。 Here, the member joining structure 10 according to the embodiment of the present invention is compared with the member joining structure 110 according to the comparative example, and the effect exerted by the member joining structure 10 according to the embodiment of the present invention is further clarified. .

図５には、比較例に係る部材接合構造１１０が適用された車両の車体１１２が拡大されて示されている。この比較例に係る車両の車体１１２では、ロッカ１１４及びフロアパネル１１８の接着部の曲げ剛性を大きくするために、ロッカ１１４及びフロアパネル１１８における接着剤１２０の近傍に当板１２４，１２６が配置されている。 FIG. 5 shows an enlarged view of the vehicle body 112 of the vehicle to which the member joining structure 110 according to the comparative example is applied. In the vehicle body 112 of the vehicle according to this comparative example, the plates 124 and 126 are disposed in the vicinity of the adhesive 120 on the rocker 114 and the floor panel 118 in order to increase the bending rigidity of the bonding portion between the rocker 114 and the floor panel 118. ing.

しかしながら、この比較例に係る車両の車体１１２では、ロッカ１１４及びフロアパネル１１８における接着剤１２０の近傍に当板１２４，１２６が配置されたことにより、当板１２４を含むロッカ１１４の中立軸Ａ１’と当板１２６を含むフロアパネル１１８の中立軸Ａ２’とが互いに離間される（一致しなくなる）。 However, in the vehicle body 112 of the vehicle according to this comparative example, the abutment plates 124 and 126 are disposed in the vicinity of the adhesive 120 in the rocker 114 and the floor panel 118, so that the neutral axis A1 ′ of the rocker 114 including the abutment plate 124 is disposed. And the neutral axis A2 ′ of the floor panel 118 including the abutting plate 126 are separated from each other (no longer coincident).

従って、例えば、フロアパネル１１８の中央部に対して乗員の荷重が垂直に作用した場合には、接着剤１２０の端部に生じる曲げモーメントＭ１，Ｍ２による応力が大きくなるので、ロッカ１１４及びフロアパネル１１８間の接着強度が低下する虞がある。 Therefore, for example, when the occupant's load is applied perpendicularly to the center portion of the floor panel 118, the stress due to the bending moments M1 and M2 generated at the end portion of the adhesive 120 increases, so the rocker 114 and the floor panel There is a possibility that the adhesive strength between 118 may decrease.

これに対し、本発明の一実施形態に係る部材接合構造１０によれば、ロッカ１４の中立軸Ａ１とフロアパネル１８の中立軸Ａ２とを一致させているので、例えば、フロアパネル１８の中央部に対して乗員の荷重Ｆ１が垂直に作用した場合でも、接着剤２０の端部に作用する曲げモーメントＭ１，Ｍ２を小さくすることができ、ロッカ１４及びフロアパネル１８間の接着強度を向上させることができる。 On the other hand, according to the member joining structure 10 according to one embodiment of the present invention, the neutral axis A1 of the rocker 14 and the neutral axis A2 of the floor panel 18 are made to coincide with each other. Even when the occupant's load F1 acts vertically, the bending moments M1, M2 acting on the end of the adhesive 20 can be reduced, and the adhesive strength between the rocker 14 and the floor panel 18 can be improved. Can do.

なお、本発明の一実施形態に係る部材接合構造１０によれば、センタートンネル部材１６の中立軸とフロアパネル１８の中立軸とについても互いに一致させているので、例えば、フロアパネル１８の中央部に対して乗員の荷重Ｆ１が垂直に作用した場合でも、接着剤２２の端部に作用する曲げモーメントを小さくすることができ、センタートンネル部材１６及びフロアパネル１８間の接着強度を向上させることができる。 In addition, according to the member joining structure 10 according to the embodiment of the present invention, the neutral axis of the center tunnel member 16 and the neutral axis of the floor panel 18 are also matched with each other. However, even when the passenger's load F1 acts perpendicularly, the bending moment acting on the end of the adhesive 22 can be reduced, and the adhesive strength between the center tunnel member 16 and the floor panel 18 can be improved. it can.

以上、本発明の一実施形態について説明したが、本発明は、上記に限定されるものでなく、その主旨を逸脱しない範囲内において種々変形して実施することが可能であることは勿論である。 As mentioned above, although one Embodiment of this invention was described, this invention is not limited above, Of course, it can change and implement variously within the range which does not deviate from the main point. .

例えば、上記実施形態では、ロッカ１４の端部１４Ａとフロアパネル１８の端部１８Ａとが接着剤２０により接着されていたが、その他にも、これらが例えば溶着等により接着されていても良い。 For example, in the above-described embodiment, the end portion 14A of the rocker 14 and the end portion 18A of the floor panel 18 are bonded by the adhesive 20. However, these may be bonded by, for example, welding or the like.

同様に、センタートンネル部材１６の端部１６Ａとフロアパネル１８の端部１８Ｂとについても例えば溶着等により接着されていても良い。 Similarly, the end 16A of the center tunnel member 16 and the end 18B of the floor panel 18 may be bonded together by welding or the like, for example.

また、上記実施形態では、本発明の一実施形態に係る部材接合構造１０が、ロッカ１４の端部１４Ａとフロアパネル１８の端部１８Ａとの接着、及び、センタートンネル部材１６の端部１６Ａとフロアパネル１８の端部１８Ｂとの接着に適用されていたが、その他の構造部材の接合に適用されていても良い。 Moreover, in the said embodiment, the member joining structure 10 which concerns on one Embodiment of this invention is the adhesion of the edge part 14A of the rocker 14, and the edge part 18A of the floor panel 18, and the edge part 16A of the center tunnel member 16 and the edge part 16A. Although applied to bonding with the end 18B of the floor panel 18, it may be applied to bonding of other structural members.

本発明の一実施形態に係る部材接合構造が適用された車両の車体を示す正面断面図である。It is front sectional drawing which shows the vehicle body of the vehicle to which the member junction structure concerning one Embodiment of this invention was applied. 図１に示される車体の要部拡大図である。It is a principal part enlarged view of the vehicle body shown by FIG. 図２に示されるフロアパネルに荷重が作用したときのロッカとフロアパネルの変形状態を示す説明図である。It is explanatory drawing which shows the deformation | transformation state of a rocker and a floor panel when a load acts on the floor panel shown by FIG. 本発明における中立軸を説明する図である。It is a figure explaining the neutral axis in this invention. 比較例に係る部材接合構造が適用された車両の車体を示す要部拡大断面図である。It is a principal part expanded sectional view which shows the vehicle body of the vehicle to which the member joining structure which concerns on a comparative example was applied.

符号の説明Explanation of symbols

１０部材接合構造
１４ロッカ（第一被接合部材）
１８フロアパネル（第二被接合部材）
Ａ１，Ａ２中立軸 10 Member Bonding Structure 14 Rocker (First Bonded Member)
18 Floor panel (second joined member)
A1, A2 Neutral shaft

Claims

第一被接合部材の中立軸と第二被接合部材の中立軸とを一致させた状態で、前記第一被接合部材及び前記第二被接合部材を接合させたことを特徴とする部材接合構造。 A member joining structure characterized in that the first joined member and the second joined member are joined in a state where the neutral shaft of the first joined member and the neutral shaft of the second joined member are aligned with each other. .

前記第一被接合部材及び前記第二被接合部材は、それぞれＦＲＰにより形成されたロッカ及びフロアパネルとされ、
前記ロッカの端部と前記フロアパネルの端部とを互いに重ね合わせた状態で接着剤により接合させた、
ことを特徴とする請求項１に記載の部材接合構造。 The first bonded member and the second bonded member are a rocker and a floor panel formed by FRP, respectively.
The end of the rocker and the end of the floor panel were joined to each other with an adhesive in an overlapping state,
The member joint structure according to claim 1.