JP5354225B2 - Rear body structure of the vehicle - Google Patents

Rear body structure of the vehicle Download PDF

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JP5354225B2
JP5354225B2 JP2012000630A JP2012000630A JP5354225B2 JP 5354225 B2 JP5354225 B2 JP 5354225B2 JP 2012000630 A JP2012000630 A JP 2012000630A JP 2012000630 A JP2012000630 A JP 2012000630A JP 5354225 B2 JP5354225 B2 JP 5354225B2
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vehicle
spare tire
storage portion
beads
storage
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JP2013139216A (en
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崇雅 前田
美香 戸石
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Mitsubishi Motors Corp
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Mitsubishi Motors Corp
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Priority to TW101149244A priority patent/TWI543898B/en
Priority to CN201210587671.3A priority patent/CN103192890B/en
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Abstract

The invention relates to a rear body structure of a vehicle, a recessed storage part suitable for storing a spare tire is formed in a bottom plate at the rear part of the vehicle, and a draw hook is arranged at the rear side of the lower part of the storage part. The storage part comprises a bottom wall which includes a periphery part of tire part of a spare tire to be supported, a middle part which is lower than the periphery part and in which the tire part of the spare tire is stored, and a step part defined between the periphery part and the middle part; and a plurality of reinforcing ribs, intervals being formed among the plurality of reinforcing ribs and the plurality of reinforcing ribs extending radially from middle parts. The draw hook is connected to the middle part of the storage part through a fastener. At least a part of the plurality of reinforcing ribs which extend from the middle parts toward the front side of the vehicle are formed to be conveniently separated at the step part.

Description

本発明は、車両の後部のスペアタイヤ収納部の強度を向上させる技術に関する。   The present invention relates to a technique for improving the strength of a spare tire storage portion at the rear of a vehicle.

従来より、多くの自動車の後部には、スペアタイヤを収納する収納部が備えられている。スペアタイヤの収納部は、例えば自動車の後部フロアにスペアタイヤの形状に合わせて略円形の凹部を形成して構成されている。
そして、スペアタイヤ収納部の底板に、収納部自体の強度（剛性)を向上させるために、スペアタイヤの収納位置の中央部から放射状にリブが設けられている車両がある(特許文献１、２)。 Conventionally, a rear portion of many automobiles is provided with a storage portion for storing a spare tire. The spare tire storage portion is configured, for example, by forming a substantially circular recess on the rear floor of an automobile in accordance with the shape of the spare tire.
In addition, in order to improve the strength (rigidity) of the storage unit itself on the bottom plate of the spare tire storage unit, there is a vehicle in which ribs are provided radially from the center of the storage position of the spare tire (Patent Documents 1 and 2). ).

また、スペアタイヤ収納部の後部下方には牽引フックが設けられており、この牽引フックから入力される荷重の一部をスペアタイヤの収納部に支持させる構造の車両がある(特許文献３)。具体的には、牽引フックが取り付けられるフックブラケットを車両前方に延ばし、スペアタイヤの中心部分が固定されるスペアタイヤの収納位置の中央部と牽引フックとの間をフックブラケットで連結して入力荷重を支持する構成としている。   Further, there is a vehicle having a structure in which a traction hook is provided below the rear portion of the spare tire storage portion, and a part of the load input from the traction hook is supported by the storage portion of the spare tire (Patent Document 3). Specifically, the hook bracket to which the tow hook is attached is extended to the front of the vehicle, and the center portion of the spare tire storage position where the center portion of the spare tire is fixed and the tow hook are connected by the hook bracket to input load. It is set as the structure which supports.

更に、特許文献３のような構造に特許文献１、２のようなビードを組み合わせることで、牽引フックから入力される前後荷重をフックブラケットとビードを介して車両前方側の部材に効率よく伝達できるように構成したものがある。   Further, by combining the bead as in Patent Documents 1 and 2 with the structure as in Patent Document 3, the longitudinal load input from the traction hook can be efficiently transmitted to the vehicle front side member via the hook bracket and the bead. There is something configured as follows.

特開２００７−３８８３９号公報JP 2007-38839 A 特開２００９−９６３４５号公報JP 2009-96345 A 特開平９−２３３６号公報Japanese Patent Laid-Open No. 9-2336

ところで、近年は、燃費向上等の目的のため、車体の軽量化が図られており、スペアタイヤ収納部においても板厚が薄肉化される傾向にある。
しかしながら、板厚を薄くすると軽量化の反面、ビードを形成しても充分に強度を確保できず牽引時の入力荷重に対して変形しやすくなるという問題が生じる。例えば、牽引により車両後方への引っ張り荷重が入力された場合には、車両前方側に延びるビード同士の間の部分に車幅（左右）方向での圧縮応力が作用するためビードとビードの間が車幅方向に縮むように座屈する虞が生じる。また、車両前方への圧縮荷重が入力された場合には、特定のビード（車幅方向中央部付近で車両前方側に延びるビード）に圧縮応力が集中してしまうためビード部分が途中で座屈してしまう虞が生じる。すなわち、薄肉化により局所的な変形や破損が生じ易くなるため、軽量化と強度確保の両立が難しかった。 By the way, in recent years, for the purpose of improving fuel consumption, the weight of the vehicle body has been reduced, and the thickness of the spare tire storage portion tends to be reduced.
However, if the plate thickness is reduced, the weight is reduced. However, even if a bead is formed, a sufficient strength cannot be ensured, and there is a problem that it is easily deformed with respect to an input load during towing. For example, when a tensile load toward the rear of the vehicle is input due to traction, a compressive stress in the vehicle width (left and right) direction acts on a portion between the beads extending forward of the vehicle, so that there is a gap between the beads and the beads. There is a risk of buckling to shrink in the vehicle width direction. In addition, when a compressive load is input to the front of the vehicle, the compressive stress is concentrated on a specific bead (bead extending toward the front of the vehicle near the center in the vehicle width direction), so the bead portion buckles in the middle. There is a risk that it will end up. That is, since local deformation and breakage are likely to occur due to the thinning, it is difficult to achieve both weight reduction and strength securing.

本発明は、この様な問題を解決するためになされたもので、その目的とするところは、車両後部のスペアタイヤの収納部において荷重の局所的な集中を抑制し、必要な強度を確保可能な自動車の後部車体構造を提供することにある。   The present invention has been made to solve such a problem, and the object of the present invention is to suppress the local concentration of the load in the spare tire storage portion at the rear of the vehicle and to secure the necessary strength. It is to provide a rear body structure of an automobile.

上記の目的を達成するために、請求項１の発明は、車両後部のフロアを下方に円形に凹ませてスペアタイヤを収納する収納部が形成され、当該収納部の下部後方に牽引フックを備える車両の後部車体構造であって、収納部には、スペアタイヤのタイヤ部が支持される外周部と、同外周部よりも低位置とされてスペアタイヤのホイール部が収納可能かつ固定される中央部と、外周部と中央部との間に設けられた段差部とで構成される底壁と、中央部から放射状に延びるように互いに間隔をおいて形成された補強用の複数のビードとが備えられ、牽引フックは、補強部材を介して収納部の中央部と連結され、複数のビードのうち、中央部に対して連結された前記補強部材の延長上で車両前方側に位置するビードは、段差部では形成されず段差部の前後で分割された状態に形成されていることを特徴とする。 In order to achieve the above object, according to the first aspect of the present invention, a storage portion for storing a spare tire is formed by recessing a floor of a rear portion of the vehicle in a circular shape downward, and a tow hook is provided at a lower rear of the storage portion. The rear body structure of the vehicle includes an outer peripheral portion on which the tire portion of the spare tire is supported, and a center in which the wheel portion of the spare tire can be stored and fixed at a lower position than the outer peripheral portion. And a plurality of reinforcing beads formed at intervals from each other so as to extend radially from the central portion. The tow hook is connected to the central portion of the storage portion via a reinforcing member, and a bead located on the vehicle front side on the extension of the reinforcing member connected to the central portion among a plurality of beads is provided. , Not formed in the stepped portion of the stepped portion Characterized in that it is formed in a state of being divided later.

また、請求項２の発明は、請求項１において、ビードは、収納部の縁部を越えて径方向外方に延長されていることを特徴とする。   The invention of claim 2 is characterized in that, in claim 1, the bead is extended radially outward beyond the edge of the storage portion.

請求項１の発明によれば、中央部から放射状に延びる複数のビードのうち、中央部に対して連結された前記補強部材の延長上で車両前方側に位置するビードを段差部では形成せず、段差部の前後で分割された状態に形成されているので、牽引フックから収納部に車両後方側への引っ張り荷重が作用した場合には、車両前方側に延びる複数のビード間に発生する圧縮荷重に対して段差部が突っ張る働きをして、ビード間における座屈を抑制することができる。また牽引フックから収納部へ車両前方側への圧縮荷重が作用した場合には、補強部材の延長上で車両前方側に位置するビードに入力した荷重が段差部を介して複数のビードに伝達し、荷重を車両前方側に拡散させることで特定のビードへの荷重の集中を抑制することができる。 According to the first aspect of the present invention, among the plurality of beads extending radially from the central portion, the bead located on the vehicle front side on the extension of the reinforcing member connected to the central portion is not formed at the stepped portion. Since it is formed in a state of being divided before and after the step portion, when a tensile load from the tow hook to the storage portion acts on the rear side of the vehicle, the compression generated between a plurality of beads extending to the front side of the vehicle The step portion can be stretched against the load, and buckling between the beads can be suppressed. Further, when a compressive load from the tow hook to the storage portion acts on the front side of the vehicle, the load input to the bead positioned on the front side of the vehicle on the extension of the reinforcing member is transmitted to the plurality of beads via the step portions. The concentration of the load on the specific bead can be suppressed by diffusing the load toward the front side of the vehicle.

また、収納部に設けられた放射状の複数のビードを、スペアタイヤを支持するために形成されている段差部を利用して、牽引による前後荷重を分散、支持させる構造となっており、比較的簡易な構造で収納部の強度を確保することが可能となる。
このように、簡易な構成で牽引荷重による収納部の変形、破損を効率よく抑制することができるので、軽量化のためスペアタイヤ収納部を薄肉化したとしても十分に強度を確保することができ、軽量化と強度維持の両立が容易となる。 In addition, a plurality of radial beads provided in the storage unit are structured to distribute and support the longitudinal load due to traction by using the stepped part formed to support the spare tire, It is possible to ensure the strength of the storage portion with a simple structure.
In this way, since the deformation and breakage of the storage portion due to the traction load can be efficiently suppressed with a simple configuration, sufficient strength can be ensured even if the spare tire storage portion is thinned for weight reduction. It is easy to achieve both weight reduction and strength maintenance.

請求項２の発明によれば、ビードが収納部の縁部を越えて径方向外方に延長されているので、荷重の集中し易い縁部がビードによって補強され、収納部での縁部での変形、破損を抑制することができる。   According to the invention of claim 2, since the bead is extended radially outward beyond the edge of the storage portion, the edge where the load is likely to concentrate is reinforced by the bead, and the edge at the storage portion is Can be prevented from being deformed or damaged.

本発明の一実施形態に係る車両の後部車体構造を示す上面図である。1 is a top view showing a rear body structure of a vehicle according to an embodiment of the present invention. 図１に示す車両の後部車体の縦断面図である。It is a longitudinal cross-sectional view of the rear vehicle body shown in FIG. 比較例の車両の後部車体構造を示す上面図である。It is a top view which shows the rear part vehicle body structure of the vehicle of a comparative example. 図３に示す車両の後部車体の縦断面図である。FIG. 4 is a longitudinal sectional view of a rear vehicle body shown in FIG. 3.

以下、本発明の実施の形態を図面に基づき説明する。
図１は、本発明の一実施形態に係る車両の後部車体構造を示す上面図である。図２は、図１に示す車両の後部車体の縦断面図である。
図１、２に示すように、本実施形態の自動車(以下、車両１という)の後部の荷室のフロア２には、スペアタイヤ３を収納する収納部４が備えられている。スペアタイヤ３の収納部４は、スペアタイヤ３の形状に合わせてフロア２に略円形の凹部を形成して構成されており、車両の左右を前後方向に延びる一対のサイドフレーム５、６の間で、かつサイドフレーム５、６を左右に連結するクロスメンバ７の後方のフロア２に設けられている。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a top view showing a rear body structure of a vehicle according to an embodiment of the present invention. 2 is a longitudinal sectional view of a rear vehicle body shown in FIG.
As shown in FIGS. 1 and 2, a storage part 4 for storing a spare tire 3 is provided on the floor 2 of the luggage compartment at the rear of the automobile (hereinafter referred to as a vehicle 1) of the present embodiment. The storage portion 4 of the spare tire 3 is configured by forming a substantially circular recess in the floor 2 in accordance with the shape of the spare tire 3, and between a pair of side frames 5 and 6 extending in the front-rear direction on the left and right sides of the vehicle. In addition, it is provided on the floor 2 behind the cross member 7 that connects the side frames 5 and 6 to the left and right.

収納部４の中心ＣＬには、ボルト１０が立設しており、スペアタイヤ３の中心孔を通してナット１１により締め付け、スペアタイヤ３を収納部４内に固定する構造となっている。
収納部４の底壁１２には、外周部１３より中央部１４を下方に凹ませるように円弧状の段差１５が設けられている。底壁１２の外周部１３はスペアタイヤ３のタイヤ部３ａを支持し、底壁１２の中央部１４にはスペアタイヤ３のホイール部３ｂが収納可能となっている。 A bolt 10 is erected at the center CL of the storage portion 4, and has a structure in which the spare tire 3 is fixed in the storage portion 4 by being tightened by a nut 11 through a center hole of the spare tire 3.
An arc-shaped step 15 is provided on the bottom wall 12 of the storage portion 4 so that the central portion 14 is recessed downward from the outer peripheral portion 13. The outer peripheral portion 13 of the bottom wall 12 supports the tire portion 3 a of the spare tire 3, and the wheel portion 3 b of the spare tire 3 can be stored in the central portion 14 of the bottom wall 12.

また、収納部４の底壁１２の下面には、ボルト１０の固定位置から車両後方端部まで延びるように補強部材１６が設けられている。そして、補強部材１６の後端部には、牽引用のフック１７(牽引フック)が固定されている。
更に、収納部４の底壁１２には、中央部１４の補強部材１６の近傍から径方向外方に向って放射状に延びるように、互いに間隔をおいて複数のビード２０、２１、２２が備えられている。ビード２０〜２２は、底壁１２を下方に数ｍｍ程度凹ませて形成されている。なお、本実施形態では、ビード２０〜２２が合計１１個設けられており、そのうち車幅方向（車両左右方向）中央部近傍の３つのビード２０、２１は、設置スペースの制約上、車両後方側の端部が一体となっている。 Further, a reinforcing member 16 is provided on the lower surface of the bottom wall 12 of the storage portion 4 so as to extend from the fixing position of the bolt 10 to the vehicle rear end. A tow hook 17 (tow hook) is fixed to the rear end portion of the reinforcing member 16.
Furthermore, the bottom wall 12 of the storage portion 4 includes a plurality of beads 20, 21, 22 spaced from each other so as to extend radially outward from the vicinity of the reinforcing member 16 of the central portion 14. It has been. The beads 20 to 22 are formed by denting the bottom wall 12 downward about several millimeters. In the present embodiment, a total of 11 beads 20 to 22 are provided, of which three beads 20 and 21 near the center in the vehicle width direction (the vehicle left-right direction) are on the vehicle rear side due to installation space restrictions. The end of is integrated.

特に、本実施形態では、車幅方向中央部近傍に設けられた、車両前方側の複数（本実施形態では５個）のビード２０、２１は、段差部１５では形成されておらず、段差部１５の前後で分割された状態に形成されている。
また、ビード２０〜２２の径方向外側の端部が収納部４の縁部２５より径方向外方へ延長している。 In particular, in the present embodiment, the plurality of (5 in the present embodiment) beads 20 and 21 on the vehicle front side provided in the vicinity of the center portion in the vehicle width direction are not formed by the step portion 15, but the step portion. It is formed in a state of being divided into 15 parts.
Further, the radially outer ends of the beads 20 to 22 extend radially outward from the edge 25 of the storage portion 4.

以上のような構成により、車両１では、フック１７から収納部４に入力される引張荷重および圧縮荷重をビード２０，２１および段差部１５を介して車両前方側に効率よく分散することで、局所的な荷重の集中を抑制することが可能となる。
ここで、段差部１５にビードが連続して形成されている比較例（従来構造）と上記本実施形態とを比較して、収納部４における荷重の作用の差異と本発明の効果について具体的に説明する。 With the configuration as described above, in the vehicle 1, the tensile load and the compressive load input from the hook 17 to the storage portion 4 are efficiently distributed to the vehicle front side via the beads 20, 21 and the step portion 15, thereby locally It becomes possible to suppress the concentration of load.
Here, a comparative example (conventional structure) in which beads are continuously formed in the stepped portion 15 is compared with the present embodiment, and the difference in the action of the load in the storage portion 4 and the effect of the present invention are specifically described. Explained.

図３は、比較例の車両３０の車体後部構造を示す上面図である。
図３に示す比較例の車両３０の収納部４は、上記本実施形態の収納部４に対して、中央部１４の車両前方側に位置するビード２０、２１が、段差部１５にも形成され、段差部１５を横切るように車両前後方向に連続するよう形成されている点が異なる。また、収納部４の車両前方側のビード２０、２１が、収納部２０の縁部２５の手前までで前方への延出が終了するように前後長さが短く形成されている。なお、車両３０では、車両前方側のビード２１が段差部１５にも形成されることから、ビード２１を設置スペースの制約上４本から２本に少なくしている。 FIG. 3 is a top view showing the rear body structure of the vehicle 30 of the comparative example.
In the storage part 4 of the vehicle 30 of the comparative example shown in FIG. 3, beads 20 and 21 located on the vehicle front side of the central part 14 are also formed in the step part 15 with respect to the storage part 4 of the present embodiment. The difference is that it is formed so as to be continuous in the vehicle longitudinal direction so as to cross the step portion 15. Further, the front and rear lengths of the beads 20 and 21 on the vehicle front side of the storage unit 4 are formed short so that the extension to the front ends before the edge 25 of the storage unit 20 ends. In the vehicle 30, since the bead 21 on the front side of the vehicle is also formed in the step portion 15, the number of the beads 21 is reduced from four to two due to installation space restrictions.

このような形状の従来例の車両３０の収納部４では、フック１７に車両後方への引張荷重が作用すると、補強部材１６を介して収納部４の中央部１４に荷重が作用し、補強部材１６より車両前方側に位置するビード２０、２１が車両後方側に引っ張られる。このため、２本のビード２１には、互いに車幅方向中央側に向かって変位する力が働き、ビード２０とビード２１との間に圧縮荷重が作用することとなる。そして、軽量化のために収納部４の底壁の板厚を薄くした場合、この圧縮荷重を支えきれず中央部１４より車両前方側のビード２０、２１間で底壁１２が車幅方向に圧縮するように座屈してしまう虞がある。   In the storage portion 4 of the conventional vehicle 30 having such a shape, when a tensile load toward the rear of the vehicle acts on the hook 17, the load acts on the central portion 14 of the storage portion 4 via the reinforcement member 16, and the reinforcement member 16, the beads 20 and 21 located on the vehicle front side are pulled toward the vehicle rear side. For this reason, a force that is displaced toward the center side in the vehicle width direction acts on the two beads 21, and a compressive load acts between the beads 20 and the beads 21. When the thickness of the bottom wall of the storage portion 4 is reduced for weight reduction, the bottom wall 12 is not supported in the vehicle width direction between the beads 20 and 21 on the vehicle front side from the central portion 14 because the compression load cannot be supported. There is a risk of buckling to compress.

また、フック１７から前方に向って圧縮荷重が作用した場合には、車幅方向中央部で前後方向に延びるビード２０が補強部材１６によって押されるためビード２０に荷重が集中されることとなる。したがって、この場合も収納部４の底壁の板厚を薄くすると、ビード２０が耐え切れず座屈してしまう虞がある。このように従来の構造では、局所的な荷重の集中が発生するため、板厚を薄くすると牽引荷重により簡単に収納部４が変形してしまうため、軽量化が難しかった。   Further, when a compressive load is applied forward from the hook 17, the bead 20 extending in the front-rear direction at the center in the vehicle width direction is pushed by the reinforcing member 16, so that the load is concentrated on the bead 20. Therefore, also in this case, if the thickness of the bottom wall of the storage portion 4 is reduced, the bead 20 may not be able to withstand and may buckle. As described above, in the conventional structure, since local load concentration occurs, if the plate thickness is reduced, the storage portion 4 is easily deformed by the traction load, and thus it is difficult to reduce the weight.

また、車幅方向中央部のビード２０の前端が縁部２５より後方までしか延長されていないので、圧縮荷重がビード２０の前方の縁部２５近傍(図３中Ｃ部)に集中し、当該縁部２５近傍が変形し易くなってしまう。
これに対し、本実施形態の収納部４では、中央部１４から車両前方に延びる車両前方側のビード２０、２１が、段差部１５には形成されておらず、段差部１５の前後で分割された構造になっているので、収納部４の車両前方側の部位では、段差部１５が略左右方向に延びるビードと同様の機能を果たしている。したがって、フック１７より補強部材１６を介して車両後方へ引張荷重が作用した際にビード２０、２１間に発生する圧縮荷重に対して、段差部１５が突っ張る働きをして、ビード２０、２１間における底壁１２の座屈を抑制することができる。 Further, since the front end of the bead 20 at the center in the vehicle width direction extends only to the rear from the edge 25, the compressive load is concentrated in the vicinity of the edge 25 at the front of the bead 20 (part C in FIG. 3). The vicinity of the edge 25 is easily deformed.
On the other hand, in the storage portion 4 of the present embodiment, the vehicle front side beads 20 and 21 extending from the center portion 14 to the front of the vehicle are not formed in the step portion 15, and are divided before and after the step portion 15. Because of this structure, the step portion 15 performs the same function as a bead extending substantially in the left-right direction at the front portion of the storage portion 4 in the vehicle. Therefore, when the tensile load acts on the rear side of the vehicle from the hook 17 via the reinforcing member 16, the stepped portion 15 acts to stretch against the compressive load generated between the beads 20 and 21, and between the beads 20 and 21. The buckling of the bottom wall 12 can be suppressed.

また、フック１７より補強部材１６を介して中央部１４に車両前方へ向けて圧縮荷重が入力された場合には、車幅方向中央部のビード２０に入力した荷重が段差部１５を介して複数のビード２１に伝達し、荷重を車両前方側に拡散させることでビード２０への荷重の集中を抑制することができる。
更に、本実施形態では、ビード２０、２１、２２の径方向外側の端部が収納部４の縁部２５の外側まで延長されているので、圧縮荷重が縁部２５に集中せず、縁部２５の変形、破損を抑制することができる。 Further, when a compressive load is input from the hook 17 to the central portion 14 via the reinforcing member 16 toward the front of the vehicle, a plurality of loads input to the bead 20 at the central portion in the vehicle width direction are supplied via the step portion 15. The concentration of the load on the bead 20 can be suppressed by transmitting the load to the bead 21 and diffusing the load to the front side of the vehicle.
Furthermore, in the present embodiment, since the radially outer ends of the beads 20, 21, 22 are extended to the outside of the edge 25 of the storage portion 4, the compressive load is not concentrated on the edge 25, and the edge 25 deformation and breakage can be suppressed.

このように、本実施形態では、収納部４に設けられた放射状の複数のビード２０、２１を、スペアタイヤ３を収納するために形成されている段差部１５を利用して荷重を分散、支持させる構造となっており、比較的簡易な構造で収納部１４の強度を確保することが可能となる。
そして、このように簡易な構成で牽引によりフック１７から収納部４に入力される引張荷重や圧縮荷重による収納部４の変形、破損を効率よく抑制することができるので、軽量化のため収納部４を薄肉化したとしても十分に強度を確保することができ、車両の軽量化と収納部４の強度維持とを容易に両立させることができる。 As described above, in the present embodiment, the plurality of radial beads 20 and 21 provided in the storage portion 4 are distributed and supported by using the step portions 15 formed to store the spare tire 3. Thus, the strength of the storage portion 14 can be secured with a relatively simple structure.
And since the deformation | transformation and breakage of the accommodating part 4 by the tensile load and the compressive load which are input into the accommodating part 4 from the hook 17 by pulling with such a simple structure can be suppressed efficiently, the accommodating part is reduced in weight. Even if the thickness of 4 is reduced, the strength can be sufficiently secured, and the weight reduction of the vehicle and the maintenance of the strength of the storage portion 4 can be easily achieved.

なお、本発明は、上記の実施形態に限定するものではない。例えば収納部４の大きさに合わせてビード２０〜２２の設置本数を変更してもよい。本発明は、スペアタイヤの収納部の底壁に略左右方向に延びる段差を有する車両に広く適用することができる。   In addition, this invention is not limited to said embodiment. For example, the number of beads 20 to 22 may be changed according to the size of the storage unit 4. The present invention can be widely applied to vehicles having a step extending substantially in the left-right direction on the bottom wall of the spare tire storage portion.

１ 車両
２ フロア
３ スペアタイヤ
４ 収納部
１２ 底壁
１５ 段差部
１７ 牽引フック
２０、２１、２２ ビード
２５ 縁部 DESCRIPTION OF SYMBOLS 1 Vehicle 2 Floor 3 Spare tire 4 Storage part 12 Bottom wall 15 Step part 17 Tow hook 20, 21, 22 Bead 25 Edge part

Claims (2)

車両後部のフロアを下方に円形に凹ませてスペアタイヤを収納する収納部が形成され、当該収納部の下部後方に牽引フックを備えた車両の後部車体構造であって、
前記収納部には、前記スペアタイヤのタイヤ部が支持される外周部と、同外周部よりも低位置とされて前記スペアタイヤのホイール部が収納可能かつ固定される中央部と、前記外周部と前記中央部との間に設けられた段差部とで構成される底壁と、
前記収納部の前記中央部から放射状に延びるように互いに間隔をおいて形成された補強用の複数のビードとが備えられ、
前記牽引フックは、補強部材を介して前記収納部の前記中央部と連結され、
前記複数のビードのうち、前記中央部に対して連結された前記補強部材の延長上で車両前方側に位置するビードは、前記段差部では形成されず、前記段差部の前後で分割された状態に形成されていることを特徴とする車両の後部車体構造。 A rear body structure of a vehicle having a storage portion for storing a spare tire by recessing the floor at the rear of the vehicle in a circular shape downward, and having a tow hook at the lower rear of the storage portion,
The storage portion includes an outer peripheral portion where the tire portion of the spare tire is supported, a central portion which is positioned lower than the outer peripheral portion and capable of storing and fixing the wheel portion of the spare tire, and the outer peripheral portion. And a bottom wall composed of a step portion provided between the center portion and the center portion,
A plurality of reinforcing beads formed at intervals from each other so as to extend radially from the central portion of the storage portion;
The tow hook is connected to the central portion of the storage portion via a reinforcing member,
Of the plurality of beads, the bead positioned on the vehicle front side on the extension of the reinforcing member connected to the central portion is not formed at the stepped portion but is divided at the front and rear of the stepped portion. A vehicle body structure for a rear portion of a vehicle. 前記ビードは、前記収納部の縁部を越えて径方向外方に延長されていることを特徴とする請求項１に記載の車両の後部車体構造。   The rear body structure of the vehicle according to claim 1, wherein the bead is extended radially outward beyond an edge of the storage portion.
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