JP6436223B2 - Bumper structure for vehicles - Google Patents

Description

  The present invention relates to a vehicle bumper structure.

  The following Patent Document 1 discloses a structure in which a recess is formed along the vehicle width direction on the front surface of an energy absorbing material (absorber) disposed on the front side of a bumper reinforcement, and a collision sensor is disposed in the recess. Has been. In this structure, the headlamp above the front bumper is rotatably attached to the bumper reinforcement using a mounting bracket. Thus, in response to an input of a predetermined value or more at the time of a front collision, the outer end in the vehicle width direction of the mounting bracket is rotated backward with the inner end in the vehicle width direction of the mounting bracket as a fulcrum. Yes. In addition, there exist some which were described in patent document 2, 3 as a structure provided with the collision detection sensor.

JP 2006-240391 A JP 2007-0669707 A International Publication No. 2011/128971

  When the structure described in Patent Document 1 is applied to a daylight running lamp (Daytime Running Lamps) or a vehicle in which the front end portion of the headlamp is arranged on the front side of the vehicle with respect to the collision sensor, When a light collision object collides, it is difficult to stroke the daylight or the headlamp sufficiently. For this reason, it is difficult to transmit the collision load to the collision sensor.

  In consideration of the above-described facts, the present invention provides a vehicle bumper structure capable of detecting a collision of a collision object when a light collision object such as a pedestrian's leg collides near the vehicle headlamp. For the purpose.

  The bumper structure for a vehicle according to the first aspect is arranged along the vehicle width direction on the vehicle front side of the bumper reinforcement extending along the vehicle width direction, and the output changes when pressed. A pedestrian collision detection sensor; provided on the vehicle front side of the bumper reinforcement; and an absorber in which the pedestrian collision detection sensor is disposed between the bumper reinforcement, and provided on the vehicle front side from the absorber. A bumper cover, and a vehicle headlamp provided at both ends of the vehicle front direction in the vehicle width direction and disposed above the bumper reinforcement, the vehicle from the vehicle headlamp at the time of a collision. A configuration in which the pedestrian collision detection sensor is pressed via the absorber by relative movement of the bumper cover in the front area toward the rear of the vehicle. It is.

  A vehicle bumper structure according to a second aspect is the vehicle bumper structure according to the first aspect, wherein a vehicle width direction outer end of the pedestrian collision detection sensor is disposed at a vehicle vertical direction lower portion of the vehicle headlamp. And a sensor receiving surface that supports an outer end of the absorber in the vehicle width direction are integrally provided, and the front surface of the absorber in the vehicle front-rear direction in the vehicle side sectional view is the vehicle headlamp. It is located on the vehicle front side from the front end in the vehicle front-rear direction.

  The bumper structure for a vehicle according to a third aspect is the bumper structure for a vehicle according to the first aspect, wherein a front end portion of the vehicle headlamp in the vehicle front-rear direction is the bumper reinforcement in a vehicle side sectional view. The front side in the vehicle front-rear direction of the absorber is a vehicle front side relative to the front end in the vehicle front-rear direction of the vehicle headlamp. The outer end of the absorber in the vehicle width direction is supported by the bumper reinforcement so as to be positioned on the side.

  The vehicle bumper structure according to a fourth aspect is the vehicle bumper structure according to the first aspect, wherein the front end portion of the vehicle headlamp in the vehicle front-rear direction is a bumper reinforcement in a vehicle side sectional view. Between the bumper cover and the bumper reinforcement, the absorber and the gap bracket provided integrally with the bumper cover are arranged in series between the bumper cover and the bumper reinforcement. It is arranged.

  A vehicle bumper structure according to a fifth aspect is the vehicle bumper structure according to the second aspect, wherein the pedestrian collision detection sensor is disposed at a vehicle width direction central portion on a lower side in the vehicle vertical direction of the bumper reinforcement. The bumper corner portion on the outer side in the vehicle width direction is arranged so as to rise toward the outer side in the vehicle width direction and correspond to the sensor receiving surface.

  The vehicle bumper structure according to a sixth aspect is the vehicle bumper structure according to the fifth aspect, wherein the absorber is disposed at the bumper corner portion along the bumper reinforcement, and the lower terminal portion. An upper terminal portion disposed so as to incline toward the upper side of the vehicle toward the sensor receiving surface.

  The vehicular bumper structure according to a seventh aspect is the vehicular bumper structure according to the third aspect, wherein the absorber has a front part positioned forward in the vehicle front-rear direction and a rear part positioned rearward in the vehicle front-rear direction. It is also constructed hard.

  According to the vehicle bumper structure described in the first aspect, a pedestrian collision detection sensor disposed along the vehicle width direction is provided on the vehicle front side of the bumper reinforcement extending along the vehicle width direction. Is provided. An absorber is provided on the vehicle front side of the bumper reinforcement, and a pedestrian collision detection sensor is disposed between the absorber and the bumper reinforcement. Further, a vehicle headlamp is disposed on the vehicle upper side from the bumper reinforcement. In this vehicle bumper structure, when a collision object such as a pedestrian's leg collides with the vehicle headlamps at both ends (bumper corners) in the vehicle width direction of the vehicle front, In the region, the bumper cover moves relative to the rear of the vehicle, thereby pressing the pedestrian collision detection sensor via the absorber. As a result, even when a collision object such as a pedestrian's leg collides with the vicinity of the vehicle headlamp, a collision with the collision object can be detected.

  According to the vehicle bumper structure described in the second aspect, the sensor receiving surface is integrally provided in the vehicle vertical direction lower part of the vehicle headlamp, and the sensor receiving surface includes a pedestrian collision detection sensor. An outer end portion in the vehicle width direction and an outer end portion in the vehicle width direction of the absorber are supported. Further, the front surface of the absorber in the vehicle front-rear direction in the vehicle side sectional view is located on the vehicle front side from the front end portion of the vehicle headlamp in the vehicle front-rear direction. As a result, before the collision object such as the pedestrian's leg collides with the vicinity of the front end of the vehicle headlamp, the absorber is crushed between the sensor receiving surface by the relative movement of the bumper cover to the rear of the vehicle. The pedestrian collision detection sensor is deformed. As a result, even when a collision object such as a pedestrian's leg collides with the vicinity of the vehicle headlamp, a collision with the collision object can be detected.

  According to the vehicle bumper structure described in the third aspect, the front end portion of the vehicle headlamp in the vehicle front-rear direction is closer to the vehicle front side than the front surface of the bumper reinforcement in the vehicle front-rear direction in the vehicle side sectional view. Has been placed. In addition, the outer end of the absorber in the vehicle width direction is the bumper so that the front surface of the absorber in the vehicle front-rear direction is located on the vehicle front side of the front end of the vehicle headlamp in the vehicle front-rear direction. Supported by reinforcement. As a result, the pedestrian collision detection sensor is pressed via the absorber by the relative movement of the bumper cover to the rear of the vehicle before a collision object such as a pedestrian's leg collides with the vicinity of the front end of the vehicle headlamp. can do. For this reason, the collision detection performance of the pedestrian in a bumper corner part can be improved.

  According to the vehicle bumper structure described in the fourth aspect, the front end portion of the vehicle headlamp in the vehicle front-rear direction is closer to the vehicle front side than the front surface of the bumper reinforcement in the vehicle front-rear direction in the vehicle side sectional view. Has been placed. Furthermore, between the bumper cover and the bumper reinforcement, a gap bracket provided integrally with the bumper cover and an absorber are arranged in series. As a result, before a collision object such as a pedestrian's leg collides with the vicinity of the front end of the vehicle headlamp, the gap bracket moves to the rear of the vehicle due to the relative movement of the bumper cover to the rear of the vehicle. Via the pedestrian collision detection sensor. For this reason, the collision detection performance of the pedestrian in a bumper corner part can be improved.

  According to the vehicle bumper structure described in the fifth aspect, the pedestrian collision detection sensor is routed at the vehicle vertical direction lower side of the bumper reinforcement at the vehicle width direction center portion, and at the bumper corner portion the vehicle width. It is arranged so as to rise toward the outside in the direction and correspond to the sensor receiving surface. In the bumper corner portion, a collision object such as a pedestrian falls into the hood side, but the absorber can be crushed at a high position on the upper side of the vehicle to deform the pedestrian collision detection sensor. For this reason, the collision discrimination performance with a pedestrian can be improved. Moreover, in the vehicle width direction center part, since the absorber with which the pedestrian collision detection sensor was attached is wired by the lower part side of bumper reinforcement, the leg part protection performance of a pedestrian can be ensured.

  According to the bumper structure for a vehicle described in the sixth aspect, the absorber is inclined at the bumper corner portion toward the vehicle upper side toward the lower terminal portion disposed along the bumper reinforcement and the sensor receiving surface. And an upper terminal portion disposed on the top. That is, by arranging the lower terminal portion below the vehicle from the upper terminal portion, it is possible to ensure the pedestrian's leg protection performance at the bumper corner portion.

  According to the vehicle bumper structure described in the seventh aspect, the absorber is configured such that the front part located in the front in the vehicle front-rear direction is harder than the rear part located in the rear in the vehicle front-rear direction. As a result, before a collision object such as a pedestrian's leg collides with the vicinity of the front end of the vehicle headlamp, the front part that is harder than the rear part of the absorber is moved by the relative movement of the bumper cover to the rear of the vehicle. When pressed, the rear part of the absorber is crushed. Thereby, the pedestrian collision detection sensor can be reliably deformed (early), and the pedestrian collision detection performance at the bumper corner portion can be improved more reliably.

  As described above, the vehicle bumper structure according to the first aspect detects a collision of a collision object when a light collision object such as a pedestrian's leg collides near the vehicle headlamp. It has an excellent effect of being able to.

  The vehicle bumper structure described in the second aspect can more reliably detect a collision with a collision object when a light collision object such as a pedestrian's leg collides with the vicinity of the vehicle headlamp. It has an excellent effect.

  The vehicle bumper structure described in the third aspect has an excellent effect that the collision detection performance of the collision object at the bumper corner portion can be improved.

  The bumper structure for a vehicle described in the fourth aspect has an excellent effect that the collision detection performance of the collision object at the bumper corner portion can be improved.

  The bumper structure for a vehicle according to the fifth aspect is excellent in that it can improve the collision discrimination performance of whether or not the colliding body is a pedestrian and can ensure the leg protection performance of the pedestrian. Has an effect.

  The bumper structure for a vehicle described in the sixth aspect has an excellent effect that the pedestrian leg protection performance of the bumper corner portion can be ensured.

  The bumper structure for a vehicle according to the seventh aspect has an excellent effect that the collision detection performance of the collision object at the bumper corner portion can be improved more reliably.

It is a sectional side view (1-1 expanded line sectional view of FIG. 2) which shows the vehicle width direction outer side edge part of the front bumper to which the bumper structure for vehicles which concerns on 1st Embodiment was applied. It is a front view which shows typically the vehicle width direction outer side part of the front bumper shown in FIG. It is a perspective view which shows typically the vehicle width direction outer side part of the front bumper shown in FIG. It is a sectional side view corresponding to FIG. 1 which shows the vehicle width direction outer side edge part of the front bumper to which the bumper structure for vehicles which concerns on 2nd Embodiment was applied. It is a sectional side view corresponding to FIG. 1 which shows the vehicle width direction outer side edge part of the front bumper to which the vehicle bumper structure which concerns on 3rd Embodiment was applied. It is a sectional side view corresponding to FIG. 1 which shows the vehicle width direction outer side edge part of the front bumper to which the vehicle bumper structure which concerns on 4th Embodiment was applied.

[First Embodiment]
Hereinafter, a first embodiment of a vehicle bumper structure according to the present invention will be described with reference to FIGS. Note that an arrow FR appropriately shown in the drawings indicates the vehicle front side, an arrow UP indicates the vehicle upper side, and an arrow OUT indicates the vehicle width direction outer side.

  FIG. 1 is a side sectional view showing one end side in the vehicle width direction (right side of the vehicle as viewed from the front of the vehicle) of the front portion of the vehicle to which the vehicle bumper structure according to the present embodiment is applied. FIG. 2 is a front view of the vehicle bumper structure shown in FIG. 1 with one end in the vehicle width direction (right side of the vehicle as viewed from the front of the vehicle) with the bumper cover omitted. 1 is a perspective view of the vehicle bumper structure shown in FIG. 1 with one end side in the vehicle width direction omitted from the bumper cover. 2 and 3, only the one end side in the vehicle width direction of the front portion of the vehicle 10 is shown. However, the vehicle bumper structure is symmetrical, so that the vehicle width direction and the like of the front portion of the vehicle 10 are other. The end side (the vehicle left side as viewed from the front of the vehicle) is not shown.

  As shown in FIG. 1, a front bumper 12 to which the vehicle bumper structure S <b> 1 of the present embodiment is applied is provided at the front of a vehicle 10 of an automobile. The front bumper 12 includes a bumper reinforcement 14 which is a bumper skeleton member. The bumper reinforcement 14 is made of, for example, an iron-based or aluminum-based metal material (in FIG. 1, extrusion molding of an aluminum-based metal) and is configured as a skeleton member extending along the vehicle width direction. . The bumper reinforcement 14 is bridged between the front end portions of a pair of left and right front side members (not shown) constituting the skeleton member on the vehicle body side. Moreover, although illustration is abbreviate | omitted, the vehicle width direction both sides part of the bumper reinforcement 14 is inclined to the vehicle rear side toward the vehicle width direction both sides by planar view.

  As shown in FIGS. 1 to 3, the front bumper 12 includes a pressure tube 18 as a pedestrian collision detection sensor disposed on the vehicle front side of the bumper reinforcement 14. In the vehicle width direction center part of the front part of the vehicle 10, the pressure tube 18 is arrange | positioned along the vehicle width direction on 14 A of front surfaces of the bumper reinforcement 14 (refer FIG.2 and FIG.3). Further, the front bumper 12 includes an absorber 20 disposed on the vehicle front side of the bumper reinforcement 14, and a pressure tube 18 is interposed between the absorber 20 and the bumper reinforcement 14 at the center in the vehicle width direction. Yes. The configuration of the pressure tube 18 and the absorber 20 will be described in detail later.

  At both ends of the front portion of the vehicle 10 in the vehicle width direction, a daylight running lamps (DRL) 22 as a vehicle headlamp is provided above the bumper reinforcement 14. The daylight 22 is composed of a rigid body. As shown in FIG. 1, the daylight 22 is formed in a substantially U shape so as to open to the vehicle front side, and a casing 24 formed in a substantially U shape so as to open to the vehicle front side. And a translucent portion 26 that covers the front side of the casing 24. A pair of upper and lower mounting pieces 24 </ b> C and 24 </ b> D that are divided into two forks are provided on the front end portions 24 </ b> A and 24 </ b> B disposed above and below the housing 24. Then, the rear end portions 26A and 26B arranged above and below the light transmitting portion 26 are inserted into the attachment pieces 24C and 24D of the housing 24 and bonded with an adhesive 28, whereby the light transmitting portion 26 is formed. It is fixed to the housing 24. A lamp lighting unit (not shown) is provided inside the housing 24. The configuration of the daylight 22 is not limited to this and can be changed.

  As shown in FIG. 1, a sensor receiver 30 for supporting the outer end of the pressure tube 18 in the vehicle width direction is provided at the lower part of the daylight 22 in the vehicle vertical direction (see FIG. 2). . The sensor receiving portion 30 includes an upper surface portion 30A fixed to the lower surface of the casing 24, an extending portion 30B extending from the front end portion of the upper surface portion 30A to the vehicle lower side and the vehicle front side, and a lower end portion of the extending portion 30B. And a vertical wall portion 30C as a sensor receiving surface disposed on the vehicle lower side. The vertical wall portion 30 </ b> C has a substantially planar shape and is disposed along the substantially vehicle width direction. Further, the sensor receiving portion 30 includes a substantially L-shaped wall portion 30D that connects the lower end portion of the vertical wall portion 30C and the rear end portion of the upper surface portion 30A. In this embodiment, the upper surface portion 30A of the sensor receiving portion 30 is fixed to the lower surface of the casing 24 of the daylight 22 so that the sensor receiving portion 30 is provided integrally with the casing 24 of the daylight 22. It has been. In the present embodiment, the casing 24 of the daylight 22 and the sensor receiver 30 are configured as separate members, but the casing 24 of the daylight 22 and the sensor receiver 30 are configured as a single member. May be.

  The absorber 20 is formed of a foamed resin material, and for example, urethane foam or the like is used. As shown in FIGS. 2 and 3, the absorber 20 includes a central portion 20 </ b> A disposed substantially horizontally along the vehicle width direction when viewed from the front of the vehicle, and a vehicle width direction end portion of the central portion 20 </ b> A up and down the vehicle. A lower terminal portion 20B and an upper terminal portion 20C formed in a bifurcated shape. That is, the absorber 20 is branched at the bumper corner portion of the front bumper 12 from the central portion 20A to the lower terminal portion 20B and the upper terminal portion 20C.

  The central portion 20A of the absorber 20 is arranged in a region on the lower side from the middle portion of the front surface 14A of the bumper reinforcement 14 in the vehicle vertical direction when viewed from the front of the vehicle. The lower terminal portion 20B of the absorber 20 extends outward in the vehicle width direction on a substantially extension of the central portion 20A. That is, the lower terminal portion 20B of the absorber 20 is arranged in a region on the lower side from the middle portion in the vehicle vertical direction of the front surface 14A of the bumper reinforcement 14 in a front view of the vehicle.

  The upper terminal portion 20C of the absorber 20 is inclined from the vehicle width direction end portion of the central portion 20A toward the vertical wall portion 30C of the sensor receiving portion 30 toward the vehicle upper side, and from the upper end portion of the inclined portion 32A to the vehicle. And an extending portion 32B extending outward in the width direction. As shown in FIG. 1, the extending portion 32B of the upper terminal portion 20C is disposed obliquely above and in front of the vehicle with respect to the lower terminal portion 20B in the vehicle side sectional view. That is, the inclined portion 32A of the upper terminal portion 20C is configured to extend from the vehicle width direction end portion of the central portion 20A toward the diagonally upper side in front of the vehicle.

  The extension part 32 </ b> B of the absorber 20 is attached to the front surface of the vertical wall part 30 </ b> C of the sensor receiving part 30. A groove portion 34C that is recessed toward the front side of the vehicle is formed on the rear surface portion 34B on the rear side in the vehicle front-rear direction of the extending portion 32B. Although not shown, the groove 34C is provided in the central portion 20A of the absorber 20, the inclined portion 32A of the upper terminal portion 20C, and the rear surface portion 34B of the extending portion 32B substantially along the vehicle width direction. The pressure tube 18 is inserted into the groove portion 34 </ b> C of the absorber 20. Thereby, the pressure tube 18 is attached to the rear side of the absorber 20. In this state, the central portion 20A and the lower end portion 20B of the absorber 20 are attached to the front surface 14A of the bumper reinforcement 14, and the extended portion 32B of the upper end portion 20C of the absorber 20 is the vertical wall portion of the sensor receiving portion 30. It is attached to the front of 30C.

  In the present embodiment, although not shown in the drawings, the protrusions provided on the vehicle width direction both ends of the rear surface portion of the lower end portion 20B of the absorber 20 are on the vehicle width direction both ends of the front surface 14A of the bumper reinforcement 14. By being engaged with the recessed portion provided, the rear surface portion 20B of the lower end portion 20B of the absorber 20 is fixed in a state of being in contact with the front surface 14A of the bumper reinforcement 14. Further, the rear surface portion 34B of the extended portion 32B of the absorber 20 is fixed in a state of being in contact with the vertical wall portion 30C of the sensor receiving portion 30 by an engagement structure of a projection portion and a concave portion (not shown). In addition, the attachment structure to the bumper reinforcement 14 of the absorber 20 and the vertical wall part 30C of the sensor receiving part 30 is not limited to this, It can change.

  As shown in FIG. 1, the front bumper 12 includes a bumper cover 44 made of a resin material or the like on the vehicle front side of the absorber 20. In the bumper corner portion of the front bumper 12, the front end portion of the daylight 22 in the vehicle front-rear direction is arranged on the vehicle front side with respect to the front surface 14 </ b> A of the bumper reinforcement 14 in the vehicle side sectional view. Furthermore, the vehicle front-rear direction front surface 34 </ b> A of the upper terminal portion 20 </ b> C of the absorber 20 is located on the vehicle front side from the front end portion of the daylight 22 in the vehicle front-rear direction in the vehicle side sectional view. As a result, when the bumper corner portion of the front bumper 12 collides with a collision body such as a pedestrian's leg, the bumper cover 44 is moved relative to the rear of the vehicle before the collision body hits the vicinity of the front end portion of the daylight 22. By moving, the upper terminal portion 20C of the absorber 20 is pressed rearward of the vehicle. In this embodiment, the absorber 20 is comprised by the comparatively soft foamed resin material (for example, foaming magnification is about 20 times-30 times).

  The pressure tube 18 has a substantially long shape, and is disposed with the vehicle width direction as a longitudinal direction. The pressure tube 18 is formed of a resin material and is configured as a hollow structure having a substantially cylindrical cross section. The pressure tube 18 can be crushed and deformed by pressing from the outside.

  2 and 3, the pressure tube 18 is disposed along the central portion 20A of the absorber 20 and the inclined portion 32A and the extending portion 32B of the upper terminal portion 20C. More specifically, the pressure tube 18 includes a central portion 18A disposed substantially horizontally along the vehicle width direction when viewed from the front of the vehicle, and obliquely outward from both sides of the central portion 18A in the vehicle width direction. An inclined portion 18B inclined upward and an outer end portion 18C extending substantially horizontally from both sides in the vehicle width direction of the inclined portion 18B toward the outer side in the vehicle width direction are provided. A central portion 18 </ b> A of the pressure tube 18 is routed on the lower side in the vehicle vertical direction of the bumper reinforcement 14. Further, in the bumper corner portion, the inclined portion 18B of the pressure tube 18 rises outward in the vehicle width direction, and the outer end portion 18C of the pressure tube 18 corresponds to the vertical wall portion 30C of the sensor receiving portion 30. It is installed. That is, the pressure tube 18 is shifted from the bumper reinforcement 14 to the vertical wall portion 30 </ b> C of the sensor receiving portion 30 as it moves from the vehicle width direction center portion to the bumper corner portion. In other words, the height in the vehicle vertical direction of the outer end portion 18C of the pressure tube 18 supported by the vertical wall portion 30C of the sensor receiving portion 30 and the extending portion 32B of the absorber 20 is a pressure located at the center in the vehicle width direction. The central portion 18 </ b> A of the tube 18 and the central portion 20 </ b> A of the absorber 20 are disposed at a position higher than the height in the vehicle vertical direction.

  The pressure sensor 40 which comprises a part of pedestrian collision detection sensor is connected to the vehicle width direction both ends of the pressure tube 18. An ECU (not shown) as a collision determination unit is electrically connected to the pressure sensor 40. When the pressure tube 18 is deformed by pressing, a signal corresponding to a pressure change in the pressure tube 18 is output from the pressure sensor 40 to the ECU. In this embodiment, the attachment part 42 provided in the pressure sensor 40 is fixedly supported by the sensor receiving part 30 or the vehicle body.

  The ECU is configured to calculate the collision load based on the output signal of the pressure sensor 40. The ECU is electrically connected to a collision speed sensor (not shown). The collision speed sensor outputs a signal corresponding to the collision speed with the colliding body to the ECU, and the ECU calculates the collision speed based on the output signal of the collision speed sensor. Then, the ECU obtains the effective mass of the collision object from the calculated collision load and collision velocity, determines whether the effective mass exceeds a threshold value, and determines whether the collision object to the front bumper 12 is a pedestrian. It is determined whether the obstacle is on the road (for example, a roadside marker or a post cone).

  As shown in FIG. 1, the bumper cover 44 is disposed so as to face the absorber 20 with a gap, and is fixedly supported to the vehicle body at a portion not shown. Both side portions of the bumper cover 44 in the vehicle width direction are formed to bend toward the vehicle rear side toward the both sides in the vehicle width direction in plan view.

  The translucent part 26 of the daylight 22 is exposed to the outside of the vehicle through an opening 44 </ b> A provided in the upper part of the bumper cover 44. The opening 44A of the bumper cover 44 is provided with a wall 44B that wraps around in a substantially U shape on the vehicle rear side, and a hole 44C is formed in the wall 44B. An attachment portion 26C that protrudes toward the front of the vehicle is provided on the front surface of the translucent portion 26 of the daylight lamp 22, and the attachment portion 26C is engaged with the hole 44C of the bumper cover 44 in the daytime. A casing 24 of the lamp 22 is fixedly supported with respect to the vehicle body. Further, a headlamp 46 as a vehicle headlamp is provided on the upper side in the vehicle vertical direction of the daylight 22 (see FIG. 2).

  Next, the operation and effect of this embodiment will be described.

  In the front bumper 12 to which the vehicle bumper structure S1 is applied, an absorber 20 is provided on the vehicle front side of the bumper reinforcement 14. The absorber 20 is branched from the central portion 20A to the lower terminal portion 20B and the upper terminal portion 20C at the bumper corner portion on the outer side in the vehicle width direction. A groove portion 34C is formed in the rear surface portion 34B of the central portion 20A and the upper end portion 20C of the absorber 20, and the pressure tube 18 is inserted into the groove portion 34C. Bumper covers 44 are provided on the front side of the vehicle from the absorber 20, and daytime lights 22 are disposed at both ends of the front portion of the vehicle 10 in the vehicle width direction above the bumper reinforcement 14. Has been.

  A sensor receiving portion 30 that supports the extended portion 32 </ b> B of the upper end portion 20 </ b> C of the absorber 20 and the outer end portion 18 </ b> C of the pressure tube 18 is provided at the lower portion of the casing 24 of the daylight 22. The central portion 20 </ b> A and the lower terminal portion 20 </ b> B of the absorber 20 are attached to the front surface 14 </ b> A of the bumper reinforcement 14, and the extending portion 32 </ b> B of the upper terminal portion 20 </ b> C of the absorber 20 is the vertical wall portion 30 </ b> C of the sensor receiving portion 30. Is attached.

  In such a front bumper 12, when the bumper corner portion of the front bumper 12 collides with a collision body such as a pedestrian's leg, the bumper cover 44 moves relative to the rear of the vehicle in the vehicle front area from the daylight 22, The pressure tube 18 is pressed through the extended portion 32 </ b> B of the absorber 20. As a result, the pressure tube 18 is deformed, and the collision with the collision object can be detected.

  More specifically, when the bumper corner portion of the front bumper 12 collides with a collision body such as a pedestrian's leg, the bumper cover 44 moves relative to the rear of the vehicle, and the upper terminal portion 20C of the absorber 20 extends. The part 32B is pressed rearward of the vehicle. At that time, since the front surface 34A of the extending portion 32B of the absorber 20 is located on the vehicle front side from the front end portion in the vehicle front-rear direction of the daylight lamp 22 in the vehicle side sectional view, the colliding body is the daylight lamp 22. Before hitting the vicinity of the front end portion, the extension portion 32B of the absorber 20 is pressed rearward by the movement of the bumper cover 44 rearward of the vehicle. That is, the energy at the initial stage of the collision is received by the extending portion 32 </ b> B of the absorber 20 on the vehicle front side of the daylight 22. Thereby, the extension part 32B of the absorber 20 is crushed between the vertical wall part 30C of the sensor receiving part 30 via the bumper cover 44, and the pressure tube 18 is deformed.

  In general, the pressure tube is arranged in front of the bumper reinforcement to more efficiently discriminate a pedestrian from the load of the collision object. However, in recent years, the trend in the design of the front part of a vehicle is to arrange a vehicle headlamp such as a daylight or a headlamp more in front of the vehicle to give the design a sense of protrusion. For this reason, when a light collision object such as a pedestrian's leg collides with a rigid vehicle headlamp, the vehicle headlamp cannot be stroked and it is difficult to transmit the load to the pressure tube. Therefore, it is difficult to ensure a stable output from the pressure sensor. Even if the vehicle headlamp can be stroked to the rear side of the vehicle, the area around the front bumper that holds the vehicle headlamp is damaged, and there is a possibility that the number of parts to be replaced increases.

  On the other hand, in the front bumper 12 of the present embodiment, the relative displacement between the bumper cover 44 and the daylight 22 is used. That is, when the collision object collides, the daylight 22 is not stroked as much as possible, and the reaction force of the sensor receiving portion 30 provided in the lower part of the daylight 22 is utilized by utilizing the mass and rigidity of the daylight 22. The extending part 32B of the absorber 20 is crushed. Since the bumper cover 44 has a sufficient rigidity difference with respect to the daylight 22, the extended portion 32 </ b> B of the absorber 20 can be crushed even by a relatively light impact body such as a pedestrian's leg. As a result, even when the pedestrian's leg collides near the daylight 22, the collision with the pedestrian can be detected.

  In the front bumper 12, the central portion 20 </ b> A of the pressure tube 18 is routed on the lower side in the vehicle vertical direction of the bumper reinforcement 14. In the bumper corner portion, the inclined portion 18B of the pressure tube 18 rises outward in the vehicle width direction, and the outer end portion 18C of the pressure tube 18 is disposed so as to correspond to the vertical wall portion 30C of the sensor receiving portion 30. Yes. When the bumper corner portion of the front bumper 12 collides with a pedestrian, the pedestrian falls into the hood side of the vehicle 10. At this time, the extended portion 32B of the absorber 20 and the outer end portion 18C of the pressure tube 18 are provided at positions higher than the central portion 20A of the absorber 20 and the central portion 18A of the pressure tube 18, so that The extending portion 32B of the absorber 20 can be crushed at a high position to deform the pressure tube 18. For this reason, it is possible to improve the collision discrimination performance as to whether or not the collision object at the bumper corner is a pedestrian. Moreover, in the vehicle width direction center part of the front bumper 12, since the center part 20A of the absorber 20 is arrange | positioned from the intermediate part of the vehicle up-down direction of the bumper reinforcement 14 to the lower part side, the leg protection performance of a pedestrian is ensured. can do.

  Further, in the bumper corner portion of the front bumper 12, the absorber 20 is inclined upward in the vehicle toward the lower terminal portion 20 </ b> B disposed along the bumper reinforcement 14 and the vertical wall portion 30 </ b> C of the sensor receiving portion 30. The upper terminal portion 20 </ b> C is arranged in a bifurcated shape. As a result, the lower terminal portion 20B can be arranged at an appropriate position below the upper terminal portion 20C and the pedestrian's leg protection performance at the bumper corner portion can be ensured.

  Further, since the front bumper 12 of this embodiment is not configured to stroke the daylight lamp 22 at the time of a collision, the number of parts is increased as compared with the conventional configuration in which the headlamp is rotated to the vehicle rear side by the mounting bracket at the time of the collision. Can be minimized.

[Second Embodiment]
Next, a second embodiment of the vehicle bumper structure according to the present invention will be described with reference to FIG. In addition, about the same component as 1st Embodiment mentioned above, the same number is attached | subjected and the description is abbreviate | omitted.

  As shown in FIG. 4, the front bumper 52 at the front of the vehicle 50 to which the vehicle bumper structure S <b> 2 is applied has an outer end in the vehicle width direction of the absorber 54 on the front surface 14 </ b> A of the bumper reinforcement 14 at the bumper corner portion. A terminal portion 54A is attached. Although not shown, the absorber 54 is formed so as to incline toward the vehicle upper side from the vehicle width direction central portion toward the vehicle width direction outer side. Thereby, in the bumper corner part of the front bumper 52, the height of the terminal part 54A of the absorber 54 is configured to be higher than the height of the central part of the absorber 54 in the vehicle width direction.

  In the bumper corner portion of the front bumper 52, the front end portion of the daytime lamp 22 in the vehicle front-rear direction in the vehicle side sectional view is disposed on the vehicle front side with respect to the front surface 14 </ b> A of the bumper reinforcement 14. Further, the terminal portion 54A of the absorber 54 is set to have a length in the vehicle front-rear direction longer than the length in the vehicle vertical direction in the vehicle side sectional view (longer than the length in the vehicle front-rear direction of the absorber in the central portion of the bumper). Is set). At that time, the absorber 54 is bumpered so that the front surface 56A of the end portion 54A of the absorber 54 in the vehicle cross-sectional view is located on the vehicle front side of the front end portion of the daylight 22 in the vehicle front-rear direction. Supported by the reinforcement 14.

  A groove portion 34C is formed in the rear surface portion 56B of the absorber 54, and the absorber 54 is attached to the front surface 14A of the bumper reinforcement 14 with the pressure tube 18 inserted into the groove portion 34C. That is, in the front bumper 52 of the present embodiment, the sensor receiving portion is not provided in the lower part of the casing 24 of the daylight 22, and the terminal portion 54 </ b> A of the absorber 54 is directly attached to the front surface 14 </ b> A of the bumper reinforcement 14. Yes.

  In the present embodiment, the absorber 54 is formed of a foamed resin material that is harder than the absorber 20 of the first embodiment shown in FIG. For example, the expansion ratio of the absorber 54 can be set to about 5 to 10 times. Here, the expansion ratio means a value obtained by dividing the density of an unfoamed material by the density of the foamed material, and “times” is used as a unit. From the viewpoint of pedestrian leg protection performance, it is preferable that only the absorber 54 at the bumper corner is harder than the absorber at the center of the bumper.

  In such a front bumper 52, when the bumper corner portion of the front bumper 52 collides with a collision body such as a pedestrian's leg, the bumper cover 44 moves relative to the rear of the vehicle in the vehicle front area from the daylight 22, The pressure tube 18 is pressed through the terminal portion 54A of the absorber 54.

  More specifically, in the front bumper 52 of the present embodiment, the front surface 56A of the terminal portion 54A of the absorber 54 is arranged on the vehicle front side with respect to the front end portion of the daylight 22 in the vehicle side sectional view. For this reason, when the bumper corner portion of the front bumper 52 collides with a collision object such as a pedestrian's leg, the bumper cover 44 is moved to the rear of the vehicle before the collision object collides near the front end of the daylight 22. By the relative movement, the pressure tube 18 can be pressed through the terminal portion 54A of the absorber 54. At that time, since the absorber 54 is formed of a relatively hard foamed resin material, the absorber 54 is prevented from being stroked and the impacting body hitting the front end portion of the daylight 22, and the pressure tube 18 is sufficiently deformed. be able to. For this reason, even when a pedestrian's leg collides with the daylight 22 vicinity, a collision with a pedestrian can be detected and the collision detection performance of the pedestrian in a bumper corner part can be improved.

[Third Embodiment]
Next, a third embodiment of the vehicle bumper structure according to the present invention will be described with reference to FIG. In addition, about the same component as 1st and 2nd embodiment mentioned above, the same number is attached | subjected and the description is abbreviate | omitted.

  As shown in FIG. 5, the front bumper 62 at the front portion of the vehicle 60 to which the vehicle bumper structure S3 is applied has an outer end in the vehicle width direction of the absorber 64 on the front surface 14A of the bumper reinforcement 14 at the bumper corner portion. A terminal portion 64A is attached. The terminal portion 64A of the absorber 64 is configured such that the hardness of the front portion 66A located on the front side in the vehicle front-rear direction is harder than the hardness of the rear portion 66B located on the rear side in the vehicle front-rear direction. The rear portion 66B of the absorber 64 is a region including the periphery of the groove 34C into which the pressure tube 18 is inserted. The length of the rear portion 66B in the vehicle front-rear direction is the length of the front portion 66A in the vehicle front-rear direction. It is set shorter than this. As a result, the rear portion 66B around the groove 34C is more easily crushed than the front portion 66A. In the present embodiment, the front end portion of the rear portion 66 </ b> B is set to be located on the rear side in the vehicle front-rear direction with respect to the front end portion of the daylight 22 in the vehicle side sectional view.

  In the present embodiment, the front portion 66A is made harder than the rear portion 66B by changing the expansion ratio of the foamed resin material constituting the absorber 64. For example, the expansion ratio of the front part 66A is set to about 5 times, and the expansion ratio of the rear part 66B is set to about 30 times.

  In such a front bumper 62, when the bumper corner portion of the front bumper 62 collides with a colliding body such as a pedestrian's leg, the bumper cover 44 before the colliding body collides with the vicinity of the front end of the daylight 22. The terminal portion 64A of the absorber 64 is pressed by the relative movement of the vehicle rearward. At that time, since the rear portion 66B of the terminal portion 64A of the absorber 64 is softer than the front portion 66A, the rear portion 66B is crushed by being pushed by the front portion 66A, and the pressure tube 18 is easily deformed. For this reason, the collision detection performance of the pedestrian in a bumper corner part can be improved.

[Fourth Embodiment]
Next, a fourth embodiment of the vehicle bumper structure according to the present invention will be described with reference to FIG. In addition, about the same component as 1st-3rd embodiment mentioned above, the same number is attached | subjected and the description is abbreviate | omitted.

  As shown in FIG. 6, the front bumper 72 in the front portion of the vehicle 70 to which the vehicle bumper structure S4 is applied is arranged at the bumper corner portion on the front surface 14A of the bumper reinforcement 14 on the outer side in the vehicle width direction of the absorber 74. Part 74A is attached. The terminal portion 74A of the absorber 74 is set so that the length in the vehicle front-rear direction is shorter than the length in the vehicle front-rear direction of the terminal portion 54A of the absorber 54 shown in FIG. A gap bracket 76 is provided between the end portion 74 </ b> A of the absorber 74 and the bumper cover 44 on the vehicle front side.

  The gap bracket 76 is configured by a substantially hat-shaped member disposed so as to open to the front side of the vehicle. The upper and lower flange portions 76 A and 76 B of the gap bracket 76 are joined to the rear surface of the bumper cover 44 by adhesion or the like, and the gap bracket 76 is provided integrally with the bumper cover 44. A gap is provided between the rear surface of the gap filling bracket 76 and the front surface of the terminal portion 74 </ b> A of the absorber 74. That is, the gap bracket 76 and the end portion 74 </ b> A of the absorber 74 are arranged in series between the bumper cover 44 and the bumper reinforcement 14 in a vehicle side sectional view. The gap bracket 76 is made of a material harder than the absorber 74, and is made of, for example, a resin material. When the gap bracket 76 is provided on the vehicle front side from the terminal portion 74A of the absorber 74, the absorber 74 can be set relatively softer than the absorber 54 shown in FIG.

  Further, the front end portion of the daytime lamp 22 in the vehicle front-rear direction in the vehicle side sectional view is disposed on the vehicle front side with respect to the front surface 14 </ b> A of the bumper reinforcement 14. In the present embodiment, the front end portion of the daylight 22 in the vehicle longitudinal direction and the front surface of the terminal portion 74A of the absorber 74 are set at substantially the same position in the vehicle longitudinal direction in the vehicle side sectional view. However, the present invention is not limited to this, and the position of the front surface of the terminal portion 74A of the absorber 74 can be changed before and after the vehicle.

  In such a front bumper 72, when the bumper corner portion of the front bumper 72 collides with a collision object such as a pedestrian's leg, the vehicle of the bumper cover 44 before the collision object hits the vicinity of the front end of the daylight 22 The gap bracket 76 presses the terminal portion 74 </ b> A of the absorber 74 by the rearward relative movement. Thereby, the pressure tube 18 can be pressed via the terminal portion 74 </ b> A of the absorber 74. For this reason, the collision detection performance of the pedestrian in a bumper corner part can be improved.

  In the front bumper 72 of the fourth embodiment, for example, the length of the gap bracket 76 in the longitudinal direction of the vehicle may be increased, and the length of the terminal portion 74A of the absorber 74 in the longitudinal direction of the vehicle may be set short. . Thereby, since the hard gap filling bracket 76 presses the terminal portion 74A of the absorber 74 at the time of the collision, the terminal portion 74A of the absorber 74 can be softened and the stroke amount of the terminal portion 74A of the absorber 74 can be reduced. .

  In the first to fourth embodiments, the daylight 22 is provided on the vehicle upper side of the outer end of the absorber in the vehicle width direction at the bumper corner portion. A headlamp as an illumination lamp may be provided.

  In the first embodiment, the sensor includes a vertical wall portion 30 </ b> C as a sensor receiving surface that supports the vehicle width direction outer end portion of the pressure tube 18 and the vehicle width direction outer end portion of the absorber at the lower portion of the daylight 22. Although the receiving part 30 is provided, it is not limited to this. For example, instead of the daylight 22, a sensor receiving surface that supports the outer end of the pressure tube 18 in the vehicle width direction and the outer end of the absorber in the vehicle width direction is provided below the headlamp as a vehicle headlamp. Also good.

  Furthermore, in 1st-4th embodiment, although the pressure tube 18 is provided as a pedestrian collision detection sensor, it is not limited to a pressure tube. For example, as the pedestrian collision detection sensor, another sensor such as a chamber type or an optical fiber type whose output changes by pressing (which can be sensed by pressing) may be used.

10 Vehicle 14 Bumper reinforcement 14A Front 18 Pressure tube (pedestrian collision detection sensor)
18A center (vehicle width direction center)
18B Inclined part (vehicle width direction outside)
18C Outer end (vehicle width direction outside)
20 Absorber 20B Lower terminal part 20C Upper terminal part 22 Daylight (vehicle headlamp)
30 Sensor receiving part (sensor receiving surface)
30C Vertical wall (sensor receiving surface)
40 Pressure sensor (pedestrian collision detection sensor)
44 Bumper cover 46 Headlamp (vehicle headlamp)
50 Vehicle 54 Absorber 54A Terminal (Vehicle width direction outer end)
56A Front surface 60 Vehicle 64 Absorber 64A Terminal portion (vehicle width direction outer end)
66A Front side portion 66B Rear side portion 70 Vehicle 74 Absorber 76 Gap filling bracket S1 Vehicle bumper structure S2 Vehicle bumper structure S3 Vehicle bumper structure S4 Vehicle bumper structure

Claims (3)

A pedestrian collision detection sensor having a tube disposed along the vehicle width direction on the vehicle front side of the bumper reinforcement extending along the vehicle width direction, the output of which changes when the tube is pressed; ,
An absorber provided on the vehicle front side of the bumper reinforcement and provided on the vehicle front side of the tube;
A bumper cover provided on the vehicle front side from the absorber;
A vehicle headlamp provided at both ends of the vehicle front direction in the vehicle width direction and disposed on the vehicle upper side from the bumper reinforcement,
In the vehicle width direction, the tube extends to the lower side of the vehicle headlamp,
It is configured to press the pedestrian collision detection sensor via the absorber by a relative movement of the bumper cover in the vehicle front area from the vehicle headlamp to the rear of the vehicle at the time of a collision.
A sensor receiving surface that integrally supports a vehicle width direction outer end portion of the pedestrian collision detection sensor and a vehicle width direction outer end portion of the absorber is integrally provided at a lower portion of the vehicle headlamp in the vehicle vertical direction. And
A vehicle bumper structure in which a front surface of the absorber in the vehicle front-rear direction is located on the vehicle front side of a front end portion of the vehicle headlamp in the vehicle front-rear direction in a vehicle side sectional view.   The pedestrian collision detection sensor is routed in the vehicle vertical direction lower side of the bumper reinforcement at the vehicle width direction central portion, and rises toward the vehicle width direction outer side at the bumper corner portion outside the vehicle width direction. The vehicle bumper structure according to claim 1, wherein the bumper structure is disposed so as to correspond to the sensor receiving surface.   In the bumper corner portion, the absorber includes a lower terminal portion disposed along the bumper reinforcement and an upper terminal portion disposed so as to incline toward the vehicle upper side toward the sensor receiving surface. The vehicular bumper structure according to claim 2, wherein the bumper structure is bifurcated.