WO2010021174A1 - Front bumper for passenger car - Google Patents

Front bumper for passenger car Download PDF

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Publication number
WO2010021174A1
WO2010021174A1 PCT/JP2009/055774 JP2009055774W WO2010021174A1 WO 2010021174 A1 WO2010021174 A1 WO 2010021174A1 JP 2009055774 W JP2009055774 W JP 2009055774W WO 2010021174 A1 WO2010021174 A1 WO 2010021174A1
Authority
WO
WIPO (PCT)
Prior art keywords
bumper
absorber
passenger car
width direction
partition plate
Prior art date
Application number
PCT/JP2009/055774
Other languages
French (fr)
Japanese (ja)
Inventor
健治 本多
哲也 篠原
聡一郎 谷
Original Assignee
トヨタ車体株式会社
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
Application filed by トヨタ車体株式会社 filed Critical トヨタ車体株式会社
Publication of WO2010021174A1 publication Critical patent/WO2010021174A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
    • B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
    • B60R19/18—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects characterised by the cross-section; Means within the bumper to absorb impact
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
    • B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
    • B60R19/18—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects characterised by the cross-section; Means within the bumper to absorb impact
    • B60R2019/1806—Structural beams therefor, e.g. shock-absorbing
    • B60R2019/1813—Structural beams therefor, e.g. shock-absorbing made of metal
    • B60R2019/182—Structural beams therefor, e.g. shock-absorbing made of metal of light metal, e.g. extruded
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
    • B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
    • B60R19/18—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects characterised by the cross-section; Means within the bumper to absorb impact
    • B60R2019/186—Additional energy absorbing means supported on bumber beams, e.g. cellular structures or material
    • B60R2019/1873—Cellular materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
    • B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
    • B60R19/18—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects characterised by the cross-section; Means within the bumper to absorb impact
    • B60R2019/1886—Bumper fascias and fastening means therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
    • B60R19/52—Radiator or grille guards ; Radiator grilles
    • B60R2019/525—Radiator grilles

Definitions

  • the present invention is a beam member extending in the vehicle width direction, a bumper reinforcement attached to the front of the vehicle body, a bumper absorber serving as a buffer member attached to the front of the bumper reinforcement, and a bumper covering the bumper absorber from the front
  • the invention relates to a front bumper of a passenger car which is composed of a cover and a cover.
  • a front bumper of a passenger car related to this is described in Patent Document 1.
  • the front bumper 100 is, as shown in the longitudinal sectional view of FIG. 7, a bumper reinforcement 102 attached to a side member 110 of the vehicle body, a bumper absorber 104 which is a buffer member attached to the front of the bumper reinforcement 102, and a bumper absorber 104. And a bumper cover 105 covering the front side.
  • a space S is formed between the outer peripheral surface of the bumper absorber 104 and the inner wall surface of the bumper cover 105 so that the impact absorption performance of the bumper against an impact load does not deteriorate.
  • the present invention has been made to solve the above-mentioned problems, and the problem to be solved by the present invention is that the hot air from the engine room does not get into the front side of the condenser or the like through the space of the front bumper. In addition to the above, it is desirable not to lower the impact absorption performance of the front bumper or to increase the cost due to the hot air wraparound measures.
  • the invention according to claim 1 is a beam member extending in the vehicle width direction, and a bumper reinforcement attached to the front of the vehicle body, a bumper absorber serving as a buffer member attached to the front of the bumper reinforcement, and the bumper absorber
  • the front bumper of a passenger car which is composed of a bumper cover that covers from the front and rear sides of the bumper absorber, the space formed inside the bumper cover extending from the outer peripheral surface of the bumper absorber at the left and right ends of the bumper absorber.
  • a partition plate portion is provided to divide in a direction, and the partition plate portion is made of the same material as the bumper absorber and configured to be broken with respect to the bumper absorber by receiving a collision load from the front. I assume.
  • the left and right end portions of the bumper absorber are provided with partition plates extending from the outer peripheral surface of the bumper absorber to divide the space formed inside the bumper cover in the vehicle width direction. For this reason, the hot air from the engine compartment enters the inside of the bumper cover from both sides in the width direction of the front bumper and is blocked by the partition plate portion even if it flows through the space in the central direction. As a result, the hot air is less likely to flow to the front side of the condenser and the radiator, and the cooling efficiency of the condenser and the like does not decrease. Further, since the partition plate portion is made of the same material as the bumper absorber, it can be integrally formed with the bumper absorber, and the cost does not increase. Furthermore, since the partition plate portion is configured to be broken with respect to the bumper absorber by receiving a collision load from the front, the presence of the partition plate portion hardly reduces the impact absorbing performance of the front bumper.
  • the partition plate portion is configured to project upward from the upper surface of the bumper absorber, and is formed in an inclined state with respect to a virtual longitudinal wall surface extending in the vehicle longitudinal direction.
  • a notch is formed between the lower end and the upper surface of the bumper absorber.
  • the invention according to claim 4 is a beam member extending in the vehicle width direction, a bumper reinforcement attached to the front of the vehicle body, a bumper absorber serving as a buffer member attached to the front of the bumper reinforcement, and the bumper absorber Is a front bumper of a passenger car including a bumper cover covering the vehicle body, the bumper absorber extending from the upper surface of the absorber main body along the front of the bumper reinforcement from the upper surface of the absorber main body extending in the vehicle width direction A space extending in the vehicle width direction is formed between the upper surface of the absorber main body of the bumper absorber and the front surface of the overhang portion and the inner wall surface of the bumper cover.
  • the overhang of the bumper absorber is the upper end located above the bumper reinforcement There projects rearwardly, characterized in that it is formed in a shape along the lower end face of the radiator grille disposed above the bumper cover.
  • the upper end portion of the projecting portion of the bumper absorber is formed in a shape along the lower end surface of the radiator grille which protrudes rearward and is disposed on the upper side of the bumper cover. That is, the gap between the upper end of the projecting portion of the bumper absorber and the lower end surface of the radiator grille can be reduced. Therefore, even if the hot air from the engine compartment enters the space from both sides in the width direction of the front bumper and moves to the central portion, the hot air flows from between the upper end of the bumper absorber and the lower end face of the radiator grill It becomes difficult to be discharged to the front side of the As a result, the cooling efficiency of the condenser and the like does not decrease. Further, since a space extending in the vehicle width direction is formed between the bumper absorber and the bumper cover, the impact absorption performance of the bumper against an impact load does not decrease.
  • the present invention it is difficult for hot air from the engine room to pass through the space of the front bumper to the front side of the condenser or the like, and the cooling efficiency of the condenser or the like does not decrease. Furthermore, there is no reduction in impact absorption performance or cost increase due to hot air wraparound measures.
  • FIG. 1 A figure showing the bumper absorber of the front bumper which concerns on Embodiment 1 of this invention
  • FIG. 2 B figure showing a bumper cover etc.
  • FIG. 1 A front longitudinal cross-sectional view (II-II arrow sectional view of FIG. 1 (A)) of a passenger car provided with a front bumper. It is the III arrow enlarged view of FIG.
  • the IVA-IVA arrow sectional view (A view) of FIG. 3, the IVB-IVB arrow sectional view (B view) of FIG. 3, and the IVC-IVC arrow sectional view (C view) of FIG. 3 are shown.
  • FIG. A a perspective view showing the bumper absorber of the front bumper which concerns on Embodiment 2 of this invention
  • a top view (figure B).
  • FIG. 5 (A) a front bumper
  • VIB-VIB arrow sectional view view B
  • FIG. 5 (A) a front bumper
  • FIG. 1 is a perspective view showing a bumper absorber, a bumper cover and the like of a front bumper according to the present embodiment
  • FIG. 2 is a front longitudinal sectional view of a passenger car provided with the front bumper (arrow II-II in FIG. 1 (A)).
  • 3 is an enlarged view in the direction of arrow III in FIG. 1 (A)
  • FIG. 4 is a sectional view of each part in FIG.
  • a condenser 10 for cooling the air conditioner refrigerant and a radiator 12 for cooling the engine cooling water (Refer to FIG. 2) are installed in a state of being stacked in front and back.
  • the condenser 10 and the radiator 12 are formed in a rectangular plate shape, and are supported by members such as a radiator support (not shown) provided on a body of a passenger car.
  • plate-like side deflectors 15 are provided on both sides of the condenser 10 and the radiator 12 in the vehicle width direction.
  • the hot air in the engine room turns to the front side of the condenser 10 along the lower surface of the left and right fender aprons (not shown) and the hood 11 (see FIG. 2).
  • a bumper reinforcement 22 of a front bumper 20 is attached to the end of a front side member (not shown) of the body of the passenger car.
  • a radiator grille 30 acting as an air intake is attached to the upper center of the front bumper 20.
  • the front bumper 20 is, as shown in FIGS. 1 and 2, a bumper reinforcement 22 which is a beam member extending in the vehicle width direction, a bumper absorber 24 which is a buffer member attached to the front of the bumper reinforcement 22, and the bumper It is comprised from the bumper cover 26 which covers the absorber 24 and bumper reinforcement 22 from the front.
  • the bumper reinforcement 22 is made of, for example, an aluminum alloy, and as shown in FIGS. 2 and 4A and 4B, the bumper reinforcement 22 is formed in a rectangular cylindrical shape whose vertical width is wider than the front and rear width.
  • the internal space of the bumper reinforcement 22 is vertically divided by a partition 22s extending in the vehicle width direction.
  • FIG. 1 and 2 a bumper reinforcement 22 which is a beam member extending in the vehicle width direction
  • a bumper absorber 24 which is a buffer member attached to the front of the bumper reinforcement 22
  • the bumper It is comprised from the bumper cover 26 which covers the absorber 24 and bumper reinforcement 22 from the front.
  • the bumper reinforcement 22 is made of, for example,
  • FIG. 4 (A) is a cross-sectional view taken along line IVA-IVA in FIG. 3
  • FIG. 4 (B) is a cross-sectional view taken along line IVB-IVB in FIG. 3
  • FIG. 4 (C) is an arrow IVC-IVC in FIG.
  • FIG. 3 shows a sectional view
  • FIG. 3 is an enlarged view of FIG. 1 (A) taken along arrow III.
  • the bumper absorber 24 is made of, for example, expanded polystyrene and is molded into a predetermined shape by a mold. As shown in FIG. 1 (A) etc., the bumper absorber 24 includes an absorber main body 241 extending in the vehicle width direction, a projecting rib 243 formed on the upper surface 241 u of the absorber main body 241, and a partition plate 245 It consists of As shown in FIG. 2 and FIG. 4 etc., the absorber main body portion 241 is formed to have a trapezoidal cross section in the vertical cross section, and covers the lower half of the front surface 22 f of the bumper reinforcement 22. It is joined. On the upper surface 241 u of the absorber main body portion 241, as shown in FIG.
  • a ridge portion 243 having a polygonal cross section extending along the front surface 22 f of the bumper reinforcement 22 is formed on the right and left sides sandwiching the central portion. It is done. Further, on the upper surface 241 u of the absorber main body portion 241, left and right partition plate portions 245 are provided at positions outside the left and right protruding portions 243 in the vehicle width direction.
  • the left and right partition plate portions 245 are plate-like members that divide the space S formed inside the cover main body portion 26m (described later) of the bumper cover 26 in the vehicle width direction. As shown in FIG. 3, the left and right partition plates 245 are formed at substantially the same positions in the vehicle width direction as the side deflectors 15 provided at both ends in the vehicle width direction of the condenser 10 and the like. As shown in FIG. 4B, the partition plate portion 245 projects upward from the upper surface 241 u of the absorber main body portion 241, and has a substantially square shape so as to cross a space S formed inside the cover main body portion 26m. It is formed.
  • a notch 246 having a substantially wedge-shaped side surface is formed between the partition plate portion 245 and the upper surface 241 u of the absorber main body portion 241.
  • the width dimension of the connecting portion 245c between the partition plate portion 245 and the absorber main body portion 241 can be reduced, and the partition plate portion 245 is easily broken with respect to the absorber main body portion 241 at the position of the connecting portion 245c.
  • the partition plate portion 245 is formed to be inclined with respect to a virtual longitudinal wall surface W extending in the vehicle longitudinal direction.
  • the bumper cover 26 is a member constituting an outer design of the front bumper 20, and a bumper grille 26h serving as an air intake is formed at a central position. Furthermore, light openings 26z are formed on the left and right sides of the bumper grille 26h.
  • the bumper cover 26 is provided with the above-mentioned cover main body 26m on the upper side of the bumper grille 26h, and the cover main body 26m corresponds to the bumper absorber 24 and the bumper reinforcement 22 as shown in FIGS. In order to cover the front face 22f from the front, it is formed to have a substantially C-shaped longitudinal sectional shape.
  • the hot air in the engine compartment is configured not to wrap around the front side of the condenser 10 or the like by the side deflector 15. However, part of the hot air enters the inside of the cover main body 26m from the left and right ends of the front bumper 20 and tries to wrap around the front side of the condenser 10 through the space S.
  • partition plates 245 are formed at the left and right ends of the bumper absorber 24 of the front bumper 20, and the partition plates 245 cross the space S formed inside the cover main body 26m. It is formed in a substantially square shape. For this reason, the hot air which is going to wrap around the front side of the condenser 10 etc.
  • the partition plate portion 245 is made of the same material as the bumper absorber 24, it can be integrally formed, and the cost does not increase. Furthermore, since the notch 246 is formed between the partition plate portion 245 and the upper surface 241 u of the absorber main body portion 241, the partition plate portion 245 is opposed to the absorber main body portion 241 at the portion (connection portion 245 c) of the notch 246. It becomes easy to break. Further, the partition plate portion 245 is formed in an inclined state with respect to a virtual vertical wall surface W extending in the longitudinal direction of the vehicle body.
  • the partition plate portion 245 is broken at the portion of the notch 246 (the connection portion 245c) and falls backward. That is, the shock absorbing performance of the front bumper 20 is hardly degraded by the presence of the partition plate portion 245.
  • FIG. 5 (A) is a perspective view of the bumper absorber
  • FIG. 5 (B) is a plan view of the bumper absorber
  • FIG. 6 (A) is a sectional view taken along the line VIA-VIA in FIG. 5 (A)
  • FIG. B) is a cross-sectional view taken along the line VIB-VIB in FIG. 5 (A).
  • the bumper absorber 50 of the front bumper is, as shown in FIG. 5A, FIG. 6A, etc., an absorber main body 52 extending in the vehicle width direction and an upper surface 52u of the absorber main body 52 It comprises an overhang portion 54 extending upward along the front surface 22 f of the bumper reinforcement 22.
  • the vertical cross-sectional shape of the absorber main body 52 is formed in a trapezoidal shape in the horizontal direction, and the thickness dimension of the absorber main body 52 between the absorber main body 52 and the bumper reinforcement 22
  • the rear space Sb is formed to reduce the As shown in FIG.
  • the overhanging portion 54 is located above the bumper reinforcement 22 at a thin wall portion 54t covering the front surface 22f of the bumper reinforcement 22 and the vertical wall portion 54t. It is comprised from the thick upper end part 54u which overhangs.
  • the upper end portion 54 u of the overhanging portion 54 protrudes rearward with respect to the front surface 22 f of the bumper reinforcement 22 and is formed along the lower end surface 32 of the radiator grille 30 as shown in FIG. 5 (B).
  • a space S extending in the vehicle width direction is formed inside the cover main body 26m. . That is, a space S extending in the vehicle width direction is formed between the upper surface 52 u of the absorber main body 52 and the front surface of the projecting portion 54 and the inner wall surface of the cover main body 26 m.
  • thin partition plates that partition the space S formed inside the cover main body 26m in the vehicle width direction 58 are formed in a bowl shape.
  • the partition plate portion 58 is formed of the same material as the bumper absorber 50.
  • the hot air is blocked by the left and right partition plate portions 58 when passing from the left and right end portions of the front bumper through the space S to the front side of the condenser 10 and the like. As a result, the hot air is less likely to flow to the front side of the condenser 10 and the like.
  • the upper end portion 54 u of the overhanging portion 54 of the bumper absorber 50 is formed in a shape along the lower end surface 32 of the radiator grille 30 which protrudes rearward and is disposed on the upper side of the bumper cover 26. Therefore, the gap between the upper end portion 54 u of the projecting portion 54 of the bumper absorber 50 and the lower end surface 32 of the radiator grille 30 can be reduced.
  • the hot air from the engine compartment enters the space S from both sides in the width direction of the front bumper and moves to the central portion, the hot air flows between the upper end 54 u of the bumper 50 and the lower end face 32 of the radiator grille 30. It becomes difficult to discharge to the front side of the capacitor 10 etc. from the gap. As a result, the cooling efficiency of the condenser and the like does not decrease. Further, since the space S extending in the vehicle width direction is formed between the bumper absorber 50 and the bumper cover 26, the impact absorption performance of the bumper against an impact load does not deteriorate.
  • the present invention is not limited to the above embodiment, and changes can be made without departing from the scope of the present invention.
  • the pair of partition plate portions 245 and 58 are formed on the left and right sides of the bumper absorbers 24 and 50 has been described. It is also possible to provide a configuration. Also, an example is shown in which the notch 246 is formed between the partition plate portion 245 and the upper surface 241 u of the absorber main body portion 241 to make the partition plate portion 245 easily breakable with respect to the absorber main body portion 241. Alternatively, a thin-walled portion or the like may be provided.

Abstract

A front bumper for a passenger car is adapted such that hot air from an engine compartment does not route to the front surface side of a capacitor through a space in the front bumper and such that measures for preventing such hot air routing do not impair impact absorbing performance of the front bumper and do not increase costs of the front bumper. The front bumper for a passenger car comprises a bumper reinforcing member (22), a bumper absorber (24) which is a cushioning member and is mounted to the front face of the bumper reinforcing member (22), and a bumper cover (26) which covers the bumper absorber (24) from the front of the passenger car. Partition plates (245) are arranged at opposite left and right ends of the bumper absorber (24) so as to project from the outer peripheral surface of the bumper absorber (24), and the partition plates (245) partition a space formed on the inner side of the bumper cover (26) into spaces lying in the width direction of the passenger car. The partition plates (245) are constructed from the same material as the bumper absorber (24) so as to bend relative to the bumper absorber (24) when subjected to a collision load applied from the front of the passenger car.

Description

乗用車のフロントバンパFront bumper of passenger car
　本発明は、車幅方向に延びる梁状部材であり、車体の前部に取付けられるバンパリインフォースと、そのバンパリインフォースの前面に取付けられる緩衝部材であるバンパアブソーバと、前記バンパアブソーバを前方から覆うバンパカバーとから構成されている乗用車のフロントバンパに関する。 The present invention is a beam member extending in the vehicle width direction, a bumper reinforcement attached to the front of the vehicle body, a bumper absorber serving as a buffer member attached to the front of the bumper reinforcement, and a bumper covering the bumper absorber from the front The invention relates to a front bumper of a passenger car which is composed of a cover and a cover.
　これに関連する乗用車のフロントバンパが特許文献１に記載されている。
　前記フロントバンパ１００は、図７の縦断面図に示すように、車体のサイドメンバ１１０に取付けられるバンパリインフォース１０２と、バンパリインフォース１０２の前面に取付けられる緩衝部材であるバンパアブソーバ１０４と、バンパアブソーバ１０４を前方から覆うバンパカバー１０５とから構成されている。そして、バンパアブソーバ１０４の外周面とバンパカバー１０５の内壁面との間には、衝撃荷重に対するバンパの衝撃吸収性能が低下しないように空間Ｓが形成されている。 A front bumper of a passenger car related to this is described in Patent Document 1.
The front bumper 100 is, as shown in the longitudinal sectional view of FIG. 7, a bumper reinforcement 102 attached to a side member 110 of the vehicle body, a bumper absorber 104 which is a buffer member attached to the front of the bumper reinforcement 102, and a bumper absorber 104. And a bumper cover 105 covering the front side. A space S is formed between the outer peripheral surface of the bumper absorber 104 and the inner wall surface of the bumper cover 105 so that the impact absorption performance of the bumper against an impact load does not deteriorate.
特開２００２－２７４４３０号公報JP 2002-274430 A
　しかし、フロントバンパ１００のバンパアブソーバ１０４とバンパカバー１０５間に空間Ｓが形成される構成では、エンジンルームからの熱風がフロントバンパ１００の左右両端部から空間Ｓを通ってコンデンサ１１２及びラジエータ１１３の前面側に回りこみ易くなる。このため、前記コンデンサ１１２等の冷却効率が低下する。
　上記問題を解決するため、フロントバンパ１００の空間Ｓを板状リブで車幅方向に仕切ることも考えられるが、前記板状リブを設ける構成ではフロントバンパ１００の強度が高くなり、衝撃荷重に対するバンパの衝撃吸収性能が低下する。
　また、フロントバンパ１００の衝撃吸収性能の低下を抑えるために、前記板状リブをウレタン等の軟らかい部材で形成する方法も考えられるが、この場合、製造コストがアップするという問題がある。 However, in the configuration in which space S is formed between bumper absorber 104 and bumper cover 105 of front bumper 100, the hot air from the engine room passes through space S from both left and right end portions of front bumper 100 and the front face of condenser 112 and radiator 113 It becomes easy to turn around. For this reason, the cooling efficiency of the said capacitor | condenser 112 grade | etc., Falls.
In order to solve the above problems, it is conceivable to divide the space S of the front bumper 100 in the vehicle width direction by a plate-like rib, but in the configuration where the plate-like rib is provided, the strength of the front bumper 100 becomes high, and the bumper against impact load Shock absorption performance of the
Although it is conceivable to form the plate-like rib with a soft member such as urethane in order to suppress the decrease in the impact absorption performance of the front bumper 100, in this case there is a problem that the manufacturing cost is increased.
　本発明は、上記問題点を解決するためになされたものであり、本発明が解決しようとする課題は、エンジンルームからの熱風がフロントバンパの空間を通ってコンデンサ等の前面側に回り込まないようにするとともに、熱風回り込み対策によりフロントバンパの衝撃吸収性能の低下やコストアップにならないようにすることである。 The present invention has been made to solve the above-mentioned problems, and the problem to be solved by the present invention is that the hot air from the engine room does not get into the front side of the condenser or the like through the space of the front bumper. In addition to the above, it is desirable not to lower the impact absorption performance of the front bumper or to increase the cost due to the hot air wraparound measures.
　上記した課題は、各請求項の発明によって解決される。
　請求項１の発明は、車幅方向に延びる梁状部材であり、車体の前部に取付けられるバンパリインフォースと、そのバンパリインフォースの前面に取付けられる緩衝部材であるバンパアブソーバと、前記バンパアブソーバを前方から覆うバンパカバーとから構成されている乗用車のフロントバンパであって、前記バンパアブソーバの左右両端部には、そのバンパアブソーバの外周面から張出して前記バンパカバーの内側に形成された空間を車幅方向に仕切る仕切り板部が設けられており、前記仕切り板部は、前記バンパアブソーバと同一材料で、前方からの衝突荷重を受けて前記バンパアブソーバに対して折れるように構成されていることを特徴とする。 The problems described above are solved by the inventions of the respective claims.
The invention according to claim 1 is a beam member extending in the vehicle width direction, and a bumper reinforcement attached to the front of the vehicle body, a bumper absorber serving as a buffer member attached to the front of the bumper reinforcement, and the bumper absorber The front bumper of a passenger car, which is composed of a bumper cover that covers from the front and rear sides of the bumper absorber, the space formed inside the bumper cover extending from the outer peripheral surface of the bumper absorber at the left and right ends of the bumper absorber. A partition plate portion is provided to divide in a direction, and the partition plate portion is made of the same material as the bumper absorber and configured to be broken with respect to the bumper absorber by receiving a collision load from the front. I assume.
　本発明によると、バンパアブソーバの左右両端部には、そのバンパアブソーバの外周面から張出して前記バンパカバーの内側に形成された空間を車幅方向に仕切る仕切り板部が設けられている。このため、エンジンルームからの熱風がフロントバンパの幅方向両側からバンパカバーの内側に入り込み、空間を通って中央方向に流れようとしても、前記仕切り板部によって遮られる。これにより、前記熱風がコンデンサ、ラジエータの前面側に回り込み難くなり、前記コンデンサ等の冷却効率が低下しない。
　また、仕切り板部はバンパアブソーバと同一材料であるため、バンパアブソーバと一体成形が可能であり、コストアップにならない。さらに、仕切り板部は、前方からの衝突荷重を受けてバンパアブソーバに対して折れるように構成されているため、仕切り板部があることでフロントバンパの衝撃吸収性能がほとんど低下しない。 According to the present invention, the left and right end portions of the bumper absorber are provided with partition plates extending from the outer peripheral surface of the bumper absorber to divide the space formed inside the bumper cover in the vehicle width direction. For this reason, the hot air from the engine compartment enters the inside of the bumper cover from both sides in the width direction of the front bumper and is blocked by the partition plate portion even if it flows through the space in the central direction. As a result, the hot air is less likely to flow to the front side of the condenser and the radiator, and the cooling efficiency of the condenser and the like does not decrease.
Further, since the partition plate portion is made of the same material as the bumper absorber, it can be integrally formed with the bumper absorber, and the cost does not increase. Furthermore, since the partition plate portion is configured to be broken with respect to the bumper absorber by receiving a collision load from the front, the presence of the partition plate portion hardly reduces the impact absorbing performance of the front bumper.
　請求項２の発明によると、仕切り板部は、バンパアブソーバの上面から上方に張出す構成で、車体前後方向に延びる仮想縦壁面に対して傾斜した状態で形成されており、前記仕切り板部の下端と前記バンパアブソーバの上面との間に切欠きが形成されていることを特徴とする。
　このように、仕切り板部の下端とバンパアブソーバの上面との間に切欠きが形成されているため、切欠きの部分で仕切り板部がバンパアブソーバに対して折れ易くなる。また、仕切り板部は車体前後方向に延びる仮想縦壁面に対して傾斜した状態で形成されているため、フロントバンパに対して車両前方から加わる衝撃荷重を受けて後方に倒れ易くなる。
　請求項３の発明によると、仕切り板部は、バンパアブソーバに対して折れ易いように薄肉に形成されていることを特徴とする。 According to the invention of claim 2, the partition plate portion is configured to project upward from the upper surface of the bumper absorber, and is formed in an inclined state with respect to a virtual longitudinal wall surface extending in the vehicle longitudinal direction. A notch is formed between the lower end and the upper surface of the bumper absorber.
Thus, since the notch is formed between the lower end of the partition plate portion and the upper surface of the bumper absorber, the partition plate portion is easily broken with respect to the bumper absorber at the portion of the notch. Further, since the partition plate portion is formed to be inclined with respect to the virtual vertical wall surface extending in the longitudinal direction of the vehicle body, the front bumper can be easily inclined backward by receiving an impact load applied from the front of the vehicle.
According to the invention of claim 3, the partition plate portion is formed thin so as to be easily broken with respect to the bumper absorber.
　請求項４の発明は、車幅方向に延びる梁状部材であり、車体の前部に取付けられるバンパリインフォースと、そのバンパリインフォースの前面に取付けられる緩衝部材であるバンパアブソーバと、前記バンパアブソーバを前方から覆うバンパカバーとから構成されている乗用車のフロントバンパであって、前記バンパアブソーバは、車幅方向に延びるアブソーバ本体部と、そのアブソーバ本体部の上面から前記バンパリインフォースの前面に沿って上方に延びる張出し部とから構成されており、前記バンパアブソーバのアブソーバ本体部の上面、及び前記張出し部の前面とバンパカバーの内壁面との間には車幅方向に延びる空間が形成されており、前記バンパアブソーバの張出し部は、前記バンパリインフォースよりも上側に位置する上端部が後方に突出して、前記バンパカバーの上側に配置されるラジエータグリルの下端面に沿う形状に形成されていることを特徴とする。 The invention according to claim 4 is a beam member extending in the vehicle width direction, a bumper reinforcement attached to the front of the vehicle body, a bumper absorber serving as a buffer member attached to the front of the bumper reinforcement, and the bumper absorber Is a front bumper of a passenger car including a bumper cover covering the vehicle body, the bumper absorber extending from the upper surface of the absorber main body along the front of the bumper reinforcement from the upper surface of the absorber main body extending in the vehicle width direction A space extending in the vehicle width direction is formed between the upper surface of the absorber main body of the bumper absorber and the front surface of the overhang portion and the inner wall surface of the bumper cover. The overhang of the bumper absorber is the upper end located above the bumper reinforcement There projects rearwardly, characterized in that it is formed in a shape along the lower end face of the radiator grille disposed above the bumper cover.
　本発明によると、バンパアブソーバの張出し部の上端部は、後方に突出してバンパカバーの上側に配置されたラジエータグリルの下端面に沿う形状に形成されている。即ち、バンパアブソーバの張出し部の上端部とラジエータグリルの下端面との間の隙間を小さくできる。このため、エンジンルームからの熱風がフロントバンパの幅方向両側から前記空間内に入り込み、中央部分まで移動しても、その熱風がバンパアブソーバの上端部とラジエータグリルの下端面との間からコンデンサ等の前面側に排出され難くなる。これにより、コンデンサ等の冷却効率が低下しない。
　また、バンパアブソーバとバンパカバーとの間には、車幅方向に延びる空間が形成されているため、衝撃荷重に対するバンパの衝撃吸収性能が低下することがない。 According to the present invention, the upper end portion of the projecting portion of the bumper absorber is formed in a shape along the lower end surface of the radiator grille which protrudes rearward and is disposed on the upper side of the bumper cover. That is, the gap between the upper end of the projecting portion of the bumper absorber and the lower end surface of the radiator grille can be reduced. Therefore, even if the hot air from the engine compartment enters the space from both sides in the width direction of the front bumper and moves to the central portion, the hot air flows from between the upper end of the bumper absorber and the lower end face of the radiator grill It becomes difficult to be discharged to the front side of the As a result, the cooling efficiency of the condenser and the like does not decrease.
Further, since a space extending in the vehicle width direction is formed between the bumper absorber and the bumper cover, the impact absorption performance of the bumper against an impact load does not decrease.
　本発明によると、エンジンルームからの熱風がフロントバンパの空間を通ってコンデンサ等の前面側に回り込み難く、コンデンサ等の冷却効率が低下しない。さらに、熱風回り込み対策により衝撃吸収性能の低下やコストアップになることがない。 According to the present invention, it is difficult for hot air from the engine room to pass through the space of the front bumper to the front side of the condenser or the like, and the cooling efficiency of the condenser or the like does not decrease. Furthermore, there is no reduction in impact absorption performance or cost increase due to hot air wraparound measures.
本発明の実施形態１に係るフロントバンパのバンパアブソーバを表す斜視図（Ａ図）、バンパカバー等を表す斜視図（Ｂ図）である。They are a perspective view (A figure) showing the bumper absorber of the front bumper which concerns on Embodiment 1 of this invention, and a perspective view (B figure) showing a bumper cover etc. FIG. フロントバンパを備える乗用車の前部縦断面図（図１（Ａ）のII-II矢視断面図）である。It is a front longitudinal cross-sectional view (II-II arrow sectional view of FIG. 1 (A)) of a passenger car provided with a front bumper. 図１のIII矢視拡大図である。It is the III arrow enlarged view of FIG. 図３のIVA-IVA矢視断面図（Ａ図）、図３のIVB-IVB矢視断面図（Ｂ図）、図３のIVC-IVC矢視断面図（Ｃ図）を表している。The IVA-IVA arrow sectional view (A view) of FIG. 3, the IVB-IVB arrow sectional view (B view) of FIG. 3, and the IVC-IVC arrow sectional view (C view) of FIG. 3 are shown. 本発明の実施形態２に係るフロントバンパのバンパアブソーバを表す斜視図（Ａ図）、平面図（Ｂ図）である。They are a perspective view (figure A) showing the bumper absorber of the front bumper which concerns on Embodiment 2 of this invention, and a top view (figure B). フロントバンパを備える乗用車の前部縦断面図（図５（Ａ）のVIA-VIA矢視断面図）（Ａ図）、図５（Ａ）のVIB-VIB矢視断面図（Ｂ図）である。It is a front longitudinal cross-sectional view of a passenger car provided with a front bumper (VIA-VIA arrow sectional view in FIG. 5 (A)) (view A), VIB-VIB arrow sectional view (view B) in FIG. 5 (A) . 従来のフロントバンパの縦断面図である。It is a longitudinal cross-sectional view of the conventional front bumper.
符号の説明Explanation of sign
２０・・・・フロントバンパ
２２・・・・バンパリインフォース
２４・・・・バンパアブソーバ
２４１・・・アブソーバ本体部
２４１ｕ・・・上面
２４５・・・・仕切り板部
２４６・・・・切欠き
２６・・・・・バンパカバー
２６ｍ・・・・カバー本体部
３０・・・・・ラジエータグリル
３２・・・・・下端面
５０・・・・・バンパアブソーバ
５２・・・・・アブソーバ本体部
５２ｕ・・・・上面
５４・・・・・張出し部
５４ｕ・・・・上端部
５４ｔ・・・・縦壁部
５８・・・・・仕切り板部
Ｓ・・・・・・空間
Ｗ・・・・・・仮想縦壁面 20 ... front bumper 22 ... bumper reinforcement 24 ... bumper absorber 241 ... absorber main body 241 u ... top surface 245 ... partition plate 246 ... notch 26 ... ..... Bumper cover 26m ..... Cover body 30 ..... Radiator grille 32 ..... Bottom face 50 ..... Bumper absorber 52 ..... Absorber body 52u .. ... top 54 ..... overhang 54u ···· upper end 54t ···· vertical wall portion 58 ..... partition plate portion S ······ space W ······ Virtual vertical wall
　　［実施形態１］
　以下、図１から図４に基づいて本発明の実施形態１に係る乗用車のフロントバンパについて説明する。ここで、図１は本実施形態に係るフロントバンパのバンパアブソーバ、バンパカバー等を表す斜視図、図２はフロントバンパを備える乗用車の前部縦断面図（図１（Ａ）のII-II矢視断面図）である。図３は図１（Ａ）のIII矢視拡大図、図４は図３の各部断面図である。
　なお、図中の前後左右、及び上下は乗用車の前後左右、及び上下に対応している。 Embodiment 1
Hereinafter, a front bumper of a passenger car according to a first embodiment of the present invention will be described based on FIGS. 1 to 4. Here, FIG. 1 is a perspective view showing a bumper absorber, a bumper cover and the like of a front bumper according to the present embodiment, and FIG. 2 is a front longitudinal sectional view of a passenger car provided with the front bumper (arrow II-II in FIG. 1 (A)). (Cross-sectional view). 3 is an enlarged view in the direction of arrow III in FIG. 1 (A), and FIG. 4 is a sectional view of each part in FIG.
In addition, front and rear, right and left, and the upper and lower sides in a figure respond | correspond to front and rear, right and left of a passenger car, and upper and lower.
＜乗用車の前部構造の概要について＞
　乗用車の前部には、エンジンルーム（図示省略）の前側に、図１（Ａ）に示すように、エアコン用冷媒を冷却するためのコンデンサ１０と、エンジンの冷却水を冷却するためのラジエータ１２（図２参照）とが前後に重ねられた状態で設置されている。コンデンサ１０とラジエータ１２とは、角形の板状に形成されており、乗用車のボディに設けられたラジエータサポート（図示省略）等の部材により支持されている。
　コンデンサ１０とラジエータ１２の車幅方向両側には、図１（Ａ）に示すように、板状のサイドディフレクタ１５が設けられている。サイドディフレクタ１５は、エンジンルーム内の熱風（図１（Ａ）の白矢印参照）が左右のフェンダエプロン（図示省略）及びフード１１（図２参照）等の下面に沿ってコンデンサ１０の前側に回り込むのを防止する働きをする。
　また、乗用車のボディのフロントサイドメンバ（図示省略）の先端には、フロントバンパ２０のバンパリインフォース２２が取付けられている。さらに、フロントバンパ２０の上側中央には、図１（Ｂ）、図２に示すように、空気取入れ口として働くラジエータグリル３０が取付けられている。 <Overview of Front Structure of Passenger Car>
At the front of the passenger car, as shown in FIG. 1A, on the front side of the engine room (not shown), a condenser 10 for cooling the air conditioner refrigerant and a radiator 12 for cooling the engine cooling water (Refer to FIG. 2) are installed in a state of being stacked in front and back. The condenser 10 and the radiator 12 are formed in a rectangular plate shape, and are supported by members such as a radiator support (not shown) provided on a body of a passenger car.
As shown in FIG. 1A, plate-like side deflectors 15 are provided on both sides of the condenser 10 and the radiator 12 in the vehicle width direction. In the side deflector 15, the hot air in the engine room (see the white arrow in FIG. 1A) turns to the front side of the condenser 10 along the lower surface of the left and right fender aprons (not shown) and the hood 11 (see FIG. 2). Work to prevent
Further, a bumper reinforcement 22 of a front bumper 20 is attached to the end of a front side member (not shown) of the body of the passenger car. Further, as shown in FIG. 1 (B) and FIG. 2, a radiator grille 30 acting as an air intake is attached to the upper center of the front bumper 20.
＜フロントバンパ２０の構成について＞
　フロントバンパ２０は、図１、図２に示すように、車幅方向に延びる梁状部材であるバンパリインフォース２２と、そのバンパリインフォース２２の前面に取付けられる緩衝部材であるバンパアブソーバ２４と、前記バンパアブソーバ２４及びバンパリインフォース２２を前方から覆うバンパカバー２６とから構成されている。
　バンパリインフォース２２は、例えば、アルミ合金製で、図２、図４（Ａ）（Ｂ）に示すように、縦幅が前後幅よりも広い角筒状に形成されている。そして、前記バンパリインフォース２２の内部空間が車幅方向に延びる隔壁２２ｓによって上下に仕切られている。
　ここで、図４（Ａ）は図３のIVA-IVA矢視断面図、図４（Ｂ）は図３のIVB-IVB矢視断面図、図４（Ｃ）は図３のIVC-IVC矢視断面図を表しており、図３は図１（Ａ）のIII矢視拡大図である。 About the Configuration of Front Bumper 20
The front bumper 20 is, as shown in FIGS. 1 and 2, a bumper reinforcement 22 which is a beam member extending in the vehicle width direction, a bumper absorber 24 which is a buffer member attached to the front of the bumper reinforcement 22, and the bumper It is comprised from the bumper cover 26 which covers the absorber 24 and bumper reinforcement 22 from the front.
The bumper reinforcement 22 is made of, for example, an aluminum alloy, and as shown in FIGS. 2 and 4A and 4B, the bumper reinforcement 22 is formed in a rectangular cylindrical shape whose vertical width is wider than the front and rear width. The internal space of the bumper reinforcement 22 is vertically divided by a partition 22s extending in the vehicle width direction.
Here, FIG. 4 (A) is a cross-sectional view taken along line IVA-IVA in FIG. 3, FIG. 4 (B) is a cross-sectional view taken along line IVB-IVB in FIG. 3, and FIG. 4 (C) is an arrow IVC-IVC in FIG. FIG. 3 shows a sectional view, and FIG. 3 is an enlarged view of FIG. 1 (A) taken along arrow III.
　バンパアブソーバ２４は、例えば、発泡スチロール製で金型により所定形状に成形される。バンパアブソーバ２４は、図１（Ａ）等に示すように、車幅方向に延びるアブソーバ本体部２４１と、そのアブソーバ本体部２４１の上面２４１ｕに形成された突条部２４３、及び仕切り板部２４５とから構成されている。アブソーバ本体部２４１は、図２、図４等に示すように、縦断面形状が横向き台形状に形成されており、バンパリインフォース２２の前面２２ｆの下半分を覆った状態で、そのバンパリインフォース２２に接合されている。
　アブソーバ本体部２４１の上面２４１ｕには、図１（Ａ）等に示すように、中央部分を挟んで右側と左側とにバンパリインフォース２２の前面２２ｆに沿って延びる断面角形の突条部２４３が形成されている。さらに、アブソーバ本体部２４１の上面２４１ｕには、左右の突条部２４３よりも車幅方向外側の位置に左右の仕切り板部２４５が設けられている。 The bumper absorber 24 is made of, for example, expanded polystyrene and is molded into a predetermined shape by a mold. As shown in FIG. 1 (A) etc., the bumper absorber 24 includes an absorber main body 241 extending in the vehicle width direction, a projecting rib 243 formed on the upper surface 241 u of the absorber main body 241, and a partition plate 245 It consists of As shown in FIG. 2 and FIG. 4 etc., the absorber main body portion 241 is formed to have a trapezoidal cross section in the vertical cross section, and covers the lower half of the front surface 22 f of the bumper reinforcement 22. It is joined.
On the upper surface 241 u of the absorber main body portion 241, as shown in FIG. 1A and the like, a ridge portion 243 having a polygonal cross section extending along the front surface 22 f of the bumper reinforcement 22 is formed on the right and left sides sandwiching the central portion. It is done. Further, on the upper surface 241 u of the absorber main body portion 241, left and right partition plate portions 245 are provided at positions outside the left and right protruding portions 243 in the vehicle width direction.
　左右の仕切り板部２４５は、バンパカバー２６のカバー本体部２６ｍ（後記する）の内側に形成された空間Ｓを車幅方向に仕切る板状部材である。左右の仕切り板部２４５は、図３に示すように、コンデンサ１０等の車幅方向両端に設けられたサイドディフレクタ１５と車幅方向においてほぼ同位置に形成されている。仕切り板部２４５は、図４（Ｂ）に示すように、アブソーバ本体部２４１の上面２４１ｕから上方に張出しており、カバー本体部２６ｍの内側に形成された空間Ｓを横断するように略角形に形成されている。また、仕切り板部２４５とアブソーバ本体部２４１の上面２４１ｕとの間には、側面略楔形をした切欠き２４６が形成されている。これにより、仕切り板部２４５とアブソーバ本体部２４１との連結部分２４５ｃの幅寸法を小さくでき、その仕切り板部２４５が連結部分２４５ｃの位置でアブソーバ本体部２４１に対して折れ易くなる。さらに、仕切り板部２４５は、図４（Ｃ）の平面図に示すように、車体前後方向に延びる仮想縦壁面Ｗに対して傾斜した状態で形成されている。 The left and right partition plate portions 245 are plate-like members that divide the space S formed inside the cover main body portion 26m (described later) of the bumper cover 26 in the vehicle width direction. As shown in FIG. 3, the left and right partition plates 245 are formed at substantially the same positions in the vehicle width direction as the side deflectors 15 provided at both ends in the vehicle width direction of the condenser 10 and the like. As shown in FIG. 4B, the partition plate portion 245 projects upward from the upper surface 241 u of the absorber main body portion 241, and has a substantially square shape so as to cross a space S formed inside the cover main body portion 26m. It is formed. Further, between the partition plate portion 245 and the upper surface 241 u of the absorber main body portion 241, a notch 246 having a substantially wedge-shaped side surface is formed. Thus, the width dimension of the connecting portion 245c between the partition plate portion 245 and the absorber main body portion 241 can be reduced, and the partition plate portion 245 is easily broken with respect to the absorber main body portion 241 at the position of the connecting portion 245c. Further, as shown in the plan view of FIG. 4C, the partition plate portion 245 is formed to be inclined with respect to a virtual longitudinal wall surface W extending in the vehicle longitudinal direction.
　バンパカバー２６は、図１（Ｂ）に示すように、フロントバンパ２０の外形意匠を構成する部材であり、中央位置に空気取入れ口として働くバンパグリル２６ｈが形成されている。さらに、バンパグリル２６ｈの左右両側にはライト用の開口部２６ｚが形成されている。バンパカバー２６は、バンパグリル２６ｈの上側に前述のカバー本体部２６ｍを備えており、そのカバー本体部２６ｍが、図４（Ａ）（Ｂ）等に示すように、バンパアブソーバ２４及びバンパリインフォース２２の前面２２ｆを前方から覆えるように縦断面形状略Ｃ字形に形成されている。 As shown in FIG. 1 (B), the bumper cover 26 is a member constituting an outer design of the front bumper 20, and a bumper grille 26h serving as an air intake is formed at a central position. Furthermore, light openings 26z are formed on the left and right sides of the bumper grille 26h. The bumper cover 26 is provided with the above-mentioned cover main body 26m on the upper side of the bumper grille 26h, and the cover main body 26m corresponds to the bumper absorber 24 and the bumper reinforcement 22 as shown in FIGS. In order to cover the front face 22f from the front, it is formed to have a substantially C-shaped longitudinal sectional shape.
＜フロントバンパ２０の働きについて＞
　エンジンルーム内の熱風はサイドディフレクタ１５によってコンデンサ１０等の前面側に回り込まないように構成されている。しかし、前記熱風の一部はフロントバンパ２０の左右両端部からカバー本体部２６ｍの内側に入り込み、空間Ｓを通ってコンデンサ１０等の前面側に回り込もうとする。
　前述のように、フロントバンパ２０のバンパアブソーバ２４には、左右両端部に仕切り板部２４５が形成されており、それらの仕切り板部２４５がカバー本体部２６ｍの内側に形成された空間Ｓを横断するように略角形に形成されている。このため、フロントバンパ２０の左右両端部から空間Ｓを通ってコンデンサ１０等の前面側に回り込もうとする熱風は、左右の仕切り板部２４５によって遮られる。これにより、熱風がコンデンサ１０等の前面側に回り込み難くなり、前記コンデンサ１０等の冷却効率が低下することがなくなる。 <About the function of front bumper 20>
The hot air in the engine compartment is configured not to wrap around the front side of the condenser 10 or the like by the side deflector 15. However, part of the hot air enters the inside of the cover main body 26m from the left and right ends of the front bumper 20 and tries to wrap around the front side of the condenser 10 through the space S.
As described above, partition plates 245 are formed at the left and right ends of the bumper absorber 24 of the front bumper 20, and the partition plates 245 cross the space S formed inside the cover main body 26m. It is formed in a substantially square shape. For this reason, the hot air which is going to wrap around the front side of the condenser 10 etc. from the left and right ends of the front bumper 20 through the space S is blocked by the left and right partition plates 245. As a result, the hot air is less likely to flow to the front side of the condenser 10 and the like, and the cooling efficiency of the condenser 10 and the like is not reduced.
　また、仕切り板部２４５はバンパアブソーバ２４と同一材料であるため、一体成形が可能で、コストアップにならない。
　さらに、仕切り板部２４５とアブソーバ本体部２４１の上面２４１ｕとの間に切欠き２４６が形成されているため、切欠き２４６の部分（連結部分２４５ｃ）で仕切り板部２４５がアブソーバ本体部２４１に対して折れ易くなる。また、仕切り板部２４５は車体前後方向に延びる仮想縦壁面Ｗに対して傾斜した状態で形成されている。このため、フロントバンパ２０に対して車両前方から衝撃荷重が加わると、仕切り板部２４５は切欠き２４６の部分（連結部分２４５ｃ）で折れ、後方に倒れるようになる。即ち、仕切り板部２４５があることでフロントバンパ２０の衝撃吸収性能がほとんど低下することがない。 Further, since the partition plate portion 245 is made of the same material as the bumper absorber 24, it can be integrally formed, and the cost does not increase.
Furthermore, since the notch 246 is formed between the partition plate portion 245 and the upper surface 241 u of the absorber main body portion 241, the partition plate portion 245 is opposed to the absorber main body portion 241 at the portion (connection portion 245 c) of the notch 246. It becomes easy to break. Further, the partition plate portion 245 is formed in an inclined state with respect to a virtual vertical wall surface W extending in the longitudinal direction of the vehicle body. Therefore, when an impact load is applied to the front bumper 20 from the front of the vehicle, the partition plate portion 245 is broken at the portion of the notch 246 (the connection portion 245c) and falls backward. That is, the shock absorbing performance of the front bumper 20 is hardly degraded by the presence of the partition plate portion 245.
　［実施形態２］
　以下、図５、図６に基づいて本発明の実施形態２に係る乗用車のフロントバンパについて説明する。本実施形態に係るフロントバンパは、実施形態１で説明したバンパアブソーバ２４の構成を変更したもので、バンパリインフォース２２とバンパカバー２６の構成は実施形態１と同様である。このため、バンパリインフォース２２とバンパカバー２６については同一符号を付して説明を省略する。
　ここで、図５（Ａ）はバンパアブソーバの斜視図、図５（Ｂ）はバンパアブソーバの平面図、図６（Ａ）は図５（Ａ）のVIA-VIA矢視断面図、図６（Ｂ）は図５（Ａ）のVIB-VIB矢視断面図である。 Second Embodiment
Hereinafter, a front bumper of a passenger car according to a second embodiment of the present invention will be described based on FIGS. 5 and 6. The front bumper according to the present embodiment is a modification of the bumper absorber 24 described in the first embodiment, and the configurations of the bumper reinforcement 22 and the bumper cover 26 are the same as those of the first embodiment. Therefore, the bumper reinforcement 22 and the bumper cover 26 are given the same reference numerals and the description thereof is omitted.
Here, FIG. 5 (A) is a perspective view of the bumper absorber, FIG. 5 (B) is a plan view of the bumper absorber, FIG. 6 (A) is a sectional view taken along the line VIA-VIA in FIG. 5 (A), FIG. B) is a cross-sectional view taken along the line VIB-VIB in FIG. 5 (A).
　本実施形態に係るフロントバンパのバンパアブソーバ５０は、図５（Ａ）、図６（Ａ）等に示すように、車幅方向に延びるアブソーバ本体部５２と、そのアブソーバ本体部５２の上面５２ｕからバンパリインフォース２２の前面２２ｆに沿って上方に延びる張出し部５４とから構成されている。アブソーバ本体部５２は、図６（Ａ）等に示すように、縦断面形状が横向き台形状に形成されており、そのアブソーバ本体部５２とバンパリインフォース２２間に前記アブソーバ本体部５２の肉厚寸法を減少させる後部空間Ｓｂが形成されている。
　張出し部５４は、図６（Ａ）等に示すように、バンパリインフォース２２の前面２２ｆを覆う薄肉の縦壁部５４ｔと、その縦壁部５４ｔの上側にあってバンパリインフォース２２に対して上方に張出す厚肉の上端部５４ｕとから構成されている。張出し部５４の上端部５４ｕは、バンパリインフォース２２の前面２２ｆに対して後方に突出しており、図５（Ｂ）に示すように、ラジエータグリル３０の下端面３２に沿う形状に形成されている。 The bumper absorber 50 of the front bumper according to the present embodiment is, as shown in FIG. 5A, FIG. 6A, etc., an absorber main body 52 extending in the vehicle width direction and an upper surface 52u of the absorber main body 52 It comprises an overhang portion 54 extending upward along the front surface 22 f of the bumper reinforcement 22. As shown in FIG. 6 (A) etc., the vertical cross-sectional shape of the absorber main body 52 is formed in a trapezoidal shape in the horizontal direction, and the thickness dimension of the absorber main body 52 between the absorber main body 52 and the bumper reinforcement 22 The rear space Sb is formed to reduce the
As shown in FIG. 6A and the like, the overhanging portion 54 is located above the bumper reinforcement 22 at a thin wall portion 54t covering the front surface 22f of the bumper reinforcement 22 and the vertical wall portion 54t. It is comprised from the thick upper end part 54u which overhangs. The upper end portion 54 u of the overhanging portion 54 protrudes rearward with respect to the front surface 22 f of the bumper reinforcement 22 and is formed along the lower end surface 32 of the radiator grille 30 as shown in FIG. 5 (B).
　上記したバンパアブソーバ５０が、図６（Ａ）に示すように、バンパカバー２６のカバー本体部２６ｍによって覆われると、そのカバー本体部２６ｍの内部には車幅方向に延びる空間Ｓが形成される。即ち、アブソーバ本体部５２の上面５２ｕ、及び張出し部５４の前面とカバー本体部２６ｍの内壁面との間に車幅方向に延びる空間Ｓが形成される。
　前記バンパアブソーバ５０の左右両端部には、図５（Ａ）、図６（Ｂ）に示すように、カバー本体部２６ｍの内部に形成された空間Ｓを車幅方向に仕切る薄肉の仕切り板部５８が鍔状に形成されている。ここで、仕切り板部５８はバンパアブソーバ５０と同一材料により形成されている。 When the bumper absorber 50 described above is covered by the cover main body 26m of the bumper cover 26 as shown in FIG. 6A, a space S extending in the vehicle width direction is formed inside the cover main body 26m. . That is, a space S extending in the vehicle width direction is formed between the upper surface 52 u of the absorber main body 52 and the front surface of the projecting portion 54 and the inner wall surface of the cover main body 26 m.
As shown in FIGS. 5A and 6B at the left and right end portions of the bumper absorber 50, thin partition plates that partition the space S formed inside the cover main body 26m in the vehicle width direction 58 are formed in a bowl shape. Here, the partition plate portion 58 is formed of the same material as the bumper absorber 50.
　このため、フロントバンパの左右両端部から空間Ｓを通ってコンデンサ１０等の前面側に回り込もうと熱風は、左右の仕切り板部５８によって遮られる。これにより、熱風がコンデンサ１０等の前面側に回り込み難くなる。
　また、バンパアブソーバ５０の張出し部５４の上端部５４ｕは、後方に突出してバンパカバー２６の上側に配置されたラジエータグリル３０の下端面３２に沿う形状に形成されている。このため、バンパアブソーバ５０の張出し部５４の上端部５４ｕとラジエータグリル３０の下端面３２との間の隙間を小さくできる。これにより、エンジンルームからの熱風がフロントバンパの幅方向両側から空間Ｓ内に入り込み、中央部分まで移動したとしても、その熱風がバンパアブソーバ５０の上端部５４ｕとラジエータグリル３０の下端面３２との間からコンデンサ１０等の前面側に排出され難くなる。これにより、コンデンサ等の冷却効率が低下することがなくなる。
　また、バンパアブソーバ５０とバンパカバー２６との間には、車幅方向に延びる空間Ｓが形成されているため、衝撃荷重に対するバンパの衝撃吸収性能が低下しない。 For this reason, the hot air is blocked by the left and right partition plate portions 58 when passing from the left and right end portions of the front bumper through the space S to the front side of the condenser 10 and the like. As a result, the hot air is less likely to flow to the front side of the condenser 10 and the like.
Further, the upper end portion 54 u of the overhanging portion 54 of the bumper absorber 50 is formed in a shape along the lower end surface 32 of the radiator grille 30 which protrudes rearward and is disposed on the upper side of the bumper cover 26. Therefore, the gap between the upper end portion 54 u of the projecting portion 54 of the bumper absorber 50 and the lower end surface 32 of the radiator grille 30 can be reduced. Thereby, even if the hot air from the engine compartment enters the space S from both sides in the width direction of the front bumper and moves to the central portion, the hot air flows between the upper end 54 u of the bumper 50 and the lower end face 32 of the radiator grille 30. It becomes difficult to discharge to the front side of the capacitor 10 etc. from the gap. As a result, the cooling efficiency of the condenser and the like does not decrease.
Further, since the space S extending in the vehicle width direction is formed between the bumper absorber 50 and the bumper cover 26, the impact absorption performance of the bumper against an impact load does not deteriorate.
＜変更例＞
　ここで、本発明は上記実施形態に限定されるものではなく、本発明の要旨を逸脱しない範囲における変更が可能である。例えば、本実施形態に係る乗用車のフロントバンパ２０では、バンパアブソーバ２４，５０の左右両側に一組の仕切り板部２４５,５８を形成する例を示したが、仕切り板部２４５,５８を複数組設ける構成でも可能である。
　また、仕切り板部２４５とアブソーバ本体部２４１の上面２４１ｕとの間に切欠き２４６を形成して、仕切り板部２４５をアブソーバ本体部２４１に対して折れ易くする例を示したが、切欠き２４６の代わりに薄肉部等を設ける構成でも可能である。
                                                                                 <Modification example>
Here, the present invention is not limited to the above embodiment, and changes can be made without departing from the scope of the present invention. For example, in the front bumper 20 of the passenger car according to the present embodiment, an example in which the pair of partition plate portions 245 and 58 are formed on the left and right sides of the bumper absorbers 24 and 50 has been described. It is also possible to provide a configuration.
Also, an example is shown in which the notch 246 is formed between the partition plate portion 245 and the upper surface 241 u of the absorber main body portion 241 to make the partition plate portion 245 easily breakable with respect to the absorber main body portion 241. Alternatively, a thin-walled portion or the like may be provided.

Claims (4)

  1. 車幅方向に延びる梁状部材であり、車体の前部に取付けられるバンパリインフォースと、そのバンパリインフォースの前面に取付けられる緩衝部材であるバンパアブソーバと、前記バンパアブソーバを前方から覆うバンパカバーとから構成されている乗用車のフロントバンパであって、
    　前記バンパアブソーバの左右両端部には、そのバンパアブソーバの外周面から張出して前記バンパカバーの内側に形成された空間を車幅方向に仕切る仕切り板部が設けられており、
    　前記仕切り板部は、前記バンパアブソーバと同一材料で、前方からの衝突荷重を受けて前記バンパアブソーバに対して折れるように構成されていることを特徴とする乗用車のフロントバンパ。     A beam-shaped member extending in the width direction of the vehicle, which comprises bumper reinforcements attached to the front of the vehicle body, bumper absorbers as shock absorbing members attached to the front of the bumper reinforcements, and a bumper cover covering the bumper absorbers from the front. The front bumper of the passenger car being
    At both left and right end portions of the bumper absorber, there are provided partition plates that project from the outer peripheral surface of the bumper absorber and partition the space formed inside the bumper cover in the vehicle width direction,
    The front bumper of a passenger car, wherein the partition plate portion is made of the same material as the bumper absorber and configured to be broken with respect to the bumper absorber under a collision load from the front.
  2. 請求項１に記載の乗用車のフロントバンパであって、
    　前記仕切り板部は、前記バンパアブソーバの上面から上方に張出す構成で、車体前後方向に延びる仮想縦壁面に対して傾斜した状態で形成されており、
    　前記仕切り板部の下端と前記バンパアブソーバの上面との間に切欠きが形成されていることを特徴とする乗用車のフロントバンパ。     A front bumper of a passenger car according to claim 1, wherein
    The partition plate portion is configured to project upward from the upper surface of the bumper absorber, and is formed in an inclined state with respect to a virtual vertical wall surface extending in the longitudinal direction of the vehicle body,
    A front bumper for a passenger car, wherein a notch is formed between a lower end of the partition plate portion and an upper surface of the bumper absorber.
  3. 請求項１に記載の乗用車のフロントバンパであって、
    　前記仕切り板部は、前記バンパアブソーバに対して折れ易いように薄肉に形成されていることを特徴とする乗用車のフロントバンパ。     A front bumper of a passenger car according to claim 1, wherein
    The front bumper of a passenger car, wherein the partition plate portion is formed thin so as to be easily broken with respect to the bumper absorber.
  4. 車幅方向に延びる梁状部材であり、車体の前部に取付けられるバンパリインフォースと、そのバンパリインフォースの前面に取付けられる緩衝部材であるバンパアブソーバと、前記バンパアブソーバを前方から覆うバンパカバーとから構成されている乗用車のフロントバンパであって、
    　前記バンパアブソーバは、車幅方向に延びるアブソーバ本体部と、そのアブソーバ本体部の上面から前記バンパリインフォースの前面に沿って上方に延びる張出し部とから構成されており、
    　前記バンパアブソーバのアブソーバ本体部の上面、及び前記張出し部の前面とバンパカバーの内壁面との間には車幅方向に延びる空間が形成されており、
    　前記バンパアブソーバの張出し部は、前記バンパリインフォースよりも上側に位置する上端部が後方に突出して、前記バンパカバーの上側に配置されるラジエータグリルの下端面に沿う形状に形成されていることを特徴とする乗用車のフロントバンパ。
                                                                                         A beam-shaped member extending in the width direction of the vehicle, which comprises bumper reinforcements attached to the front of the vehicle body, bumper absorbers as shock absorbing members attached to the front of the bumper reinforcements, and a bumper cover covering the bumper absorbers from the front. The front bumper of the passenger car being
    The bumper absorber comprises an absorber main body extending in the vehicle width direction and an overhang extending upward from the upper surface of the absorber main body along the front surface of the bumper reinforcement.
    A space extending in the vehicle width direction is formed between the upper surface of the absorber main body of the bumper absorber and the front surface of the overhang portion and the inner wall surface of the bumper cover,
    The projecting portion of the bumper absorber is characterized in that the upper end portion located above the bumper reinforcement projects rearward and is formed along the lower end surface of the radiator grille disposed above the bumper cover. Front bumper of passenger cars.
PCT/JP2009/055774 2008-08-18 2009-03-24 Front bumper for passenger car WO2010021174A1 (en)

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JPS5935146U (en) * 1982-08-30 1984-03-05 日産自動車株式会社 vehicle bumper
JPH11208389A (en) * 1998-01-30 1999-08-03 Nissan Motor Co Ltd Bumper for automobile
JP2006160015A (en) * 2004-12-06 2006-06-22 Fuji Heavy Ind Ltd Bumper impact absorption member
JP2007008190A (en) * 2005-06-28 2007-01-18 Aisin Seiki Co Ltd Movable grille shutter device for vehicle

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5935146U (en) * 1982-08-30 1984-03-05 日産自動車株式会社 vehicle bumper
JPH11208389A (en) * 1998-01-30 1999-08-03 Nissan Motor Co Ltd Bumper for automobile
JP2006160015A (en) * 2004-12-06 2006-06-22 Fuji Heavy Ind Ltd Bumper impact absorption member
JP2007008190A (en) * 2005-06-28 2007-01-18 Aisin Seiki Co Ltd Movable grille shutter device for vehicle

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