JP2001071837A - Front part body structure of vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent second injury, by providing an energy absorbing member at a front part of a member in a vehicular width direction and providing at a lower part of a bumper a projecting member of which tip projects frontward of the member in the vehicular width direction to surely get a pedestrain on a hood, in case a vehicle and the pedestrain collides with each other. SOLUTION: A projecting member 12 is disposed and supported by a front cross member 10 at a rear end portion thereof. At a lower part of a front bumper 9, the projecting member 12 is projected frontward from the front cross member 10 in an approximately horizontal manner. The tip of the projecting member 12 projects frontward of a bumper reinforcement 7, and is set at a position where the longitudinal position is approximately same as that of an energy absorbing member 8, or at a position frontward of the energy absorbing member 8. In the constitution, in case a vehicle collides with a pedestrain, the projecting member 12 sweeps the pedestrain off his/her feet at a part lower than a knee height to protect his/her by getting him/her on an upper part of the hood 1, after absorbing the shock energy of his/her knees by the energy absorbing member 8.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a front vehicle body structure of a vehicle for ensuring pedestrian safety in a collision between the vehicle and a pedestrian.

[0002]

2. Description of the Related Art Conventionally, as a front body structure of a vehicle provided with a bumper at a lower front portion of a hood extending forward, for example, there is a structure disclosed in Japanese Patent Application Laid-Open No. 11-1149. That is, a bumper face, a foam material as a shock absorbing material,
This is a general structure including a bumper having a bumper reinforcement. In this case, when the vehicle and the pedestrian collide, there is a problem that the pedestrian is obstructed.

In order to solve such a problem, an airbag device for a vehicle disclosed in Japanese Patent Application Laid-Open No. 6-72284 has already been invented. This device includes a sensor (ultrasonic sensor) that detects an obstacle ahead of a vehicle such as a pedestrian while storing an airbag in a front bumper, and detects a vehicle based on both outputs of the sensor and a vehicle traveling state detecting unit. When the collision is predicted, the airbag in the front bumper is deployed in the vehicle traveling direction to prevent direct contact between the pedestrian and the vehicle, thereby assuring pedestrian safety. .

[0004] This conventional device has an advantage that pedestrians can be secured, but on the other hand, it requires obstacle detection means such as a sensor and an airbag, which complicates the structure and may cause a malfunction. Was.

[0005]

The invention according to claim 1 of the present invention includes a vehicle width direction member in which a bumper extends in the vehicle width direction, and an energy absorbing member provided at a front portion of the vehicle width direction member. By providing a projecting member at the lower part of the bumper, the tip of which protrudes forward from the vehicle width direction member, when the vehicle and the pedestrian collide, the above-mentioned projecting member allows the user to walk below the pedestrian's knee. After absorbing the impact energy of the knees of the pedestrian who leans toward the vehicle with the feet of the pedestrian, the energy absorbing member absorbs the impact energy, and then the pedestrian is securely placed on the hood to prevent secondary obstacles. It is an object of the present invention to provide a vehicle body structure which is simple and does not malfunction.

According to a second aspect of the present invention, in addition to the object of the first aspect, by setting the above-mentioned vehicle width direction member to a bumper reinforcement, an existing member can be effectively used. It is an object of the present invention to provide a front body structure of a vehicle that can perform the above-described operation.

According to a third aspect of the present invention, in addition to the object of the first aspect, the distal end of the projecting member is positioned forward or backward from the distal end of the energy absorbing member. It is another object of the present invention to provide a front vehicle body structure of a vehicle that can surely pay a foot of a pedestrian below a pedestrian's knee by a projecting member at the time of collision between the vehicle and the pedestrian.

According to a fourth aspect of the present invention, in addition to the object of the first aspect of the present invention, the above-mentioned energy absorbing member is disposed forward of a line connecting the tip of the bonnet and the tip of the projecting member. An object of the present invention is to provide a front vehicle body structure of a vehicle that can more effectively absorb impact energy of a knee portion of a pedestrian who leans toward a vehicle by being positioned.

According to a fifth aspect of the present invention, in addition to the object of the first aspect, the energy absorption amount of the projecting member is set to be larger than the energy absorption amount of the energy absorbing member. Therefore, an object of the present invention is to provide a vehicle body front structure capable of reliably removing a pedestrian from a lower leg portion.

According to a sixth aspect of the present invention, in addition to the object of the first aspect, by forming the above-mentioned projecting member with a resin member, the moldability of the projecting member and the projecting member can be improved. It is an object of the present invention to provide a front vehicle body structure of a vehicle which has good assemblability to a vehicle and can improve responsiveness to a vehicle design.

According to a seventh aspect of the present invention, in addition to the object of the first aspect, the above-mentioned projecting member is
By providing a side member along the lower part of the bumper face and a supporting member for supporting the side member on the front part of the vehicle body, the above-mentioned protruding member can be formed by the side member and the supporting member. The purpose is to provide a vehicle body structure.

According to an eighth aspect of the present invention, in addition to the object of the first aspect of the present invention, the above-mentioned energy absorbing member is formed by an energy absorber member (such as a styrene foam or the like).
A member), resin structure and damping device (see damper)
By configuring with any one of the above, it is possible to reliably absorb energy by the above-described energy absorbing member in a stage before the pedestrian hits the bonnet, and it is possible to reduce the tilting speed of the pedestrian, It is another object of the present invention to provide a front body structure of a vehicle in which a pedestrian can be more reliably put on an upper portion of a hood.

According to a ninth aspect of the present invention, in addition to the object of the first aspect, the above-mentioned projecting member is attached to a vehicle-body-side strength member (a front cross member, a perimeter frame) at a front portion of the vehicle. An object of the present invention is to provide a front vehicle body structure of a vehicle that can secure the supporting strength of a protruding member by being attached.

According to a tenth aspect of the present invention, in addition to the object of the first aspect, the projecting member is set to a strength that does not cause damage to a foot of a pedestrian in a collision. Accordingly, it is an object of the present invention to provide a front vehicle body structure of a vehicle that can ensure the safety of a leg when a pedestrian walks with a protruding member.

According to an eleventh aspect of the present invention, there is provided a bumper including a bumper face and a vehicle width direction member located behind the bumper face, and a lower portion of the bumper extends in the vehicle width direction and has a rear portion. A vehicle and a pedestrian are provided by providing a lower leg support member supported by the vehicle body side strength member so that when the bumper face is displaced rearward, the tip of the lower leg support member protrudes relatively from the vehicle width direction member. After the pedestrian's feet are paid below the pedestrian's knee with the lower leg support member in the event of a collision with the pedestrian, the pedestrian can be securely placed on the hood to prevent secondary obstacles, and the structure is simple Further, it is an object of the present invention to provide a front vehicle body structure of a vehicle that does not cause a malfunction, has no restrictions on design of a bumper, and can improve assemblability.

According to a twelfth aspect of the present invention, in addition to the object of the eleventh aspect, by setting the vehicle width direction member to a bumper reinforcement,
It is an object of the present invention to provide a front vehicle body structure of a vehicle in which existing members can be effectively used.

According to a thirteenth aspect of the present invention, in addition to the object of the eleventh aspect, the energy absorption amount of the lower leg support member is reduced by the energy absorption member provided at the front of the vehicle width direction member. By setting the energy absorption amount larger than the energy absorption amount of the pedestrian, the pedestrian can be reliably removed from the lower leg and the impact energy of the knee of the pedestrian leaning toward the vehicle can be absorbed by the energy absorbing member. It is an object of the present invention to provide a front vehicle body structure of a vehicle capable of performing the above-mentioned.

According to a fourteenth aspect of the present invention, in addition to the object of the thirteenth aspect, the above energy absorbing member is constituted by a rib provided integrally with a bumper face, so that energy can be absorbed. It is an object of the present invention to provide a front vehicle body structure of a vehicle that can increase the amount and easily adjust the amount of energy absorption.

According to a fifteenth aspect of the present invention, in addition to the object of the thirteenth or fourteenth aspect, by providing a predetermined distance between the energy absorbing rib and the bumper reinforcement, It is an object of the present invention to provide a front vehicle body structure of a vehicle that can reliably move a lower support member when a face is displaced rearward and that can reliably remove a pedestrian from a lower leg.

According to a sixteenth aspect of the present invention, in addition to the object of the eleventh aspect, the lower leg support member is formed of a rib, the thickness of the upper rib is reduced, and the thickness of the lower rib is reduced. By setting the wall thickness to be large, it is possible to secure the deflection of the lower leg support member when a load is input from the road side, and to provide a front body structure of the vehicle which is advantageous in relation to the approach angle. .

According to a seventeenth aspect of the present invention, in addition to the object of the eleventh aspect of the present invention, the lower leg support member is constituted by a rib, the interval between the upper ribs is made coarse, and the interval between the lower ribs is made large. The purpose of the present invention is to provide a front vehicle body structure of a vehicle which can secure the deflection of the lower leg support member when a load is input from the road side and is advantageous in relation to the approach angle.

According to an eighteenth aspect of the present invention, in addition to the object of the thirteenth, fourteenth, or fifteenth aspect, the energy absorbing member has a front rib and a rear rib. By forming the energy absorption amount of the ribs to be small and the energy absorption amount of the rear ribs to be large, the collision shock is relieved at the initial stage, and thereafter, a reliable energy absorption amount is obtained, and in particular, a substantially step-like shape is obtained. It is an object of the present invention to provide a front body structure of a vehicle capable of obtaining energy absorption characteristics, increasing an energy absorption amount as a whole, and easily adjusting an energy absorption load by using ribs. .

According to a nineteenth aspect of the present invention, in addition to the object of the eighteenth aspect, by setting the thickness of the front rib to be small and the thickness of the rear rib to be large, It is an object of the present invention to provide a front body structure of a vehicle capable of securing a certain amount of energy absorption while relieving a collision shock at the beginning of a collision.

According to a twentieth aspect of the present invention, in addition to the object of the eighteenth aspect, the rib spacing between the front ribs is set coarse and the rib spacing between the rear ribs is set densely. It is an object of the present invention to provide a front body structure of a vehicle capable of securing a certain amount of energy absorption while relieving a collision shock at the beginning of a collision.

[0025]

According to a first aspect of the present invention, there is provided a front vehicle body structure of a vehicle provided with a bumper at a lower front portion of a hood of the vehicle, and a vehicle width direction member at a front portion of the vehicle. A front body structure of a vehicle comprising: an energy absorbing member provided at a front portion of the vehicle width direction member; and a projecting member provided at a lower portion of the bumper and having a front end portion projecting forward from the vehicle width direction member. There is a feature.

According to a second aspect of the present invention, in addition to the effect of the first aspect, the front vehicle body of the vehicle in which the vehicle width direction member at the front of the vehicle body is set to a bumper reinforcement. It is characterized by having a structure.

According to a third aspect of the present invention, in addition to the effect of the first aspect, the tip of the projecting member is located forward or rearward of the front end of the energy absorbing member. It is characterized by a partial body structure.

According to a fourth aspect of the present invention, in addition to the effect of the first aspect, the energy absorbing member is positioned forward of a line connecting the tip of the bonnet and the tip of the projecting member. And a front body structure of the vehicle.

According to a fifth aspect of the present invention, in addition to the effect of the first aspect, a vehicle in which the energy absorption of the projecting member is set to be larger than the energy absorption of the energy absorbing member. Characterized by a front body structure.

According to a sixth aspect of the present invention, in addition to the effect of the first aspect, the projecting member has a front body structure of a vehicle formed of a resin member. I do.

According to a seventh aspect of the present invention, in addition to the effect of the first aspect of the present invention, the projecting member is provided along a bumper face lower portion, and the projecting member is provided at a front portion of the vehicle body. And a supporting member for supporting the vehicle.

According to an eighth aspect of the present invention, in addition to the effect of the first aspect, the energy absorbing member is constituted by any one of an energy absorber member, a resin structure, and a damping device. And a front body structure of the vehicle.

According to a ninth aspect of the present invention, in addition to the effect of the first aspect, the projecting member has a front body structure of a vehicle attached to a vehicle body-side strength member at a front portion of the vehicle. There is a feature.

According to a tenth aspect of the present invention, in addition to the effect of the first aspect, the vehicle in which the protruding member is set to a strength that does not cause damage to a foot of a pedestrian in a collision. Characterized by a front body structure.

According to an eleventh aspect of the present invention, there is provided a front vehicle body structure of a vehicle having a bumper at a lower front portion of a hood of the vehicle, wherein the bumper is located at a rear side of the bumper face. A lower leg support member that extends in the vehicle width direction and a rear portion of the lower leg support member is supported by the vehicle body-side strength member. When the bumper face is displaced rearward, the lower leg support member The vehicle body structure is characterized in that the front end is configured to protrude relatively from the vehicle width direction member.

According to a twelfth aspect of the present invention, in addition to the effect of the eleventh aspect, the vehicle width direction member is a front body structure of a vehicle set to a bumper reinforcement. It is characterized by.

According to a thirteenth aspect of the present invention, in addition to the effect of the eleventh aspect, an energy absorbing member provided at a front portion of the vehicle width direction member is provided. The energy absorption amount is set to be larger than the energy absorption amount of the energy absorbing member, and the front body structure of the vehicle is characterized.

According to a fourteenth aspect of the present invention, in addition to the effect of the thirteenth aspect, the energy absorbing member is formed by a rib provided integrally with a bumper face. It is characterized by having a structure.

According to a fifteenth aspect of the present invention, in addition to the effect of the thirteenth or fourteenth aspect, the energy absorbing member is constituted by an energy absorbing rib,
The vehicle body structure has a front body structure in which a predetermined space is provided between the energy absorbing rib and the bumper reinforcement.

According to a sixteenth aspect of the present invention, in addition to the effect of the eleventh aspect, the lower leg support member is formed of a rib, the thickness of the upper rib is reduced, and the thickness of the lower rib is reduced. The vehicle body structure is a front body structure of a vehicle whose thickness is set to be large.

According to a seventeenth aspect of the present invention, in addition to the effect of the eleventh aspect, the lower leg support member is constituted by a rib, and the interval between the upper ribs is made coarse and the interval between the lower ribs is reduced. It is characterized by a front body structure of a vehicle set densely.

According to an eighteenth aspect of the present invention, in addition to the effects of the thirteenth, fourteenth, or fifteenth aspect, the energy absorbing member includes a front rib and a rear rib. The front body structure of the vehicle is formed such that the energy absorption is small and the energy absorption of the rear rib is large.

According to a nineteenth aspect of the present invention, in addition to the effect of the eighteenth aspect, the present invention provides a vehicle in which the front ribs have a small thickness and the rear ribs have a large thickness. It has a front body structure.

According to a twentieth aspect of the present invention, in addition to the effect of the eighteenth aspect, the present invention provides a vehicle in which the rib intervals of the front ribs are set coarse and the rib intervals of the rear ribs are set densely. It has a front body structure.

[0045]

According to the first aspect of the present invention, an energy absorbing member is provided at a front portion of the above-mentioned vehicle width direction member, and a tip end portion of the lower portion of the bumper is smaller than a vehicle width direction member. Since a projecting member projecting forward is provided, at the time of collision between the vehicle and the pedestrian, first, the above-mentioned projecting member pays the foot of the pedestrian below the knee of the pedestrian, and then walks down to the vehicle side. After absorbing the impact energy of the knee of the pedestrian with the above-described energy absorbing member, the pedestrian can be surely put on the upper part of the hood to prevent a secondary obstacle.

Further, by setting the strength of the protruding member (setting the load characteristic), it is possible to ensure the safety of the pedestrian's leg (without giving a fracture), and it is also advantageous in that the structure is simple and there is no malfunction.

According to the second aspect of the present invention,
In addition to the effect of the first aspect of the present invention, since the above-described vehicle width direction member is set to a bumper reinforcement,
There is an effect that an existing member (bumper reinforcement) extending in the vehicle width direction can be effectively used.

According to the third aspect of the present invention,
In addition to the effect of the first aspect of the present invention, the tip of the projecting member is located forward or rearward from the tip of the energy absorbing member. There is an effect that the foot of the pedestrian can be surely paid below the knee.

According to the invention described in claim 4 of the present invention,
In addition to the effect of the first aspect of the present invention, the energy absorbing member is located forward of a line connecting the tip of the bonnet and the tip of the protruding member. There is an effect that the impact energy can be more effectively absorbed by the above-described energy absorbing member, and the leg of the pedestrian can be protected from the impact.

According to the invention described in claim 5 of the present invention,
In addition to the effect of the first aspect of the present invention, since the energy absorption amount of the above-mentioned projecting member is set to be larger than the energy absorption amount of the energy absorbing member, the pedestrian can be reliably moved from the lower leg by the projecting member. There is an effect that can be paid.

According to the invention described in claim 6 of the present invention,
In addition to the effect of the first aspect of the present invention, since the above-mentioned projecting member is formed of a resin member, the moldability of the projecting member and the assemblability of the projecting member to the vehicle are improved.
Moreover, there is an effect that the responsiveness to the vehicle design can be improved.

According to the seventh aspect of the present invention,
In addition to the effect of the first aspect of the present invention, the above-mentioned projecting member includes a side member along the lower part of the bumper face and a supporting member for supporting the side member at the front of the vehicle body. Can be constituted by the side member and the support member.

According to the eighth aspect of the present invention,
In addition to the effect of the first aspect of the present invention, the energy absorbing member is constituted by any one of the energy absorber member, the resin structure, and the damping device. There is an effect that the energy can be reliably absorbed by any of the energy absorbing members, the pedestrian's tilting speed can be reduced, and the pedestrian can be more reliably put on the upper part of the hood.

According to the ninth aspect of the present invention,
In addition to the effect of the first aspect of the present invention, since the above-mentioned projecting member is attached to the vehicle-body-side strength member at the front part of the vehicle body, the load from the front is received by the vehicle-body-side strength member, and Can be surely paid,
There is an effect that sufficient supporting strength of the protruding member can be secured.

According to the tenth aspect of the present invention, in addition to the effect of the first aspect, the projecting member is set to a strength that does not cause damage to the foot of the pedestrian in the event of a collision. Therefore, there is an effect that the safety of the lower leg portion can be ensured when the pedestrian walks away with the protruding member.

According to the eleventh aspect of the present invention, there is provided a bumper including a bumper face and a vehicle width direction member located behind the bumper face, and a lower portion of the bumper extends in the vehicle width direction. A lower leg support member whose rear portion is supported by the vehicle body-side strength member is provided, and when the bumper face is displaced rearward, the tip of the lower leg support member is configured to protrude relatively from the vehicle width direction member. It has the following effects.

That is, at the time of collision between the vehicle and the pedestrian, the bumper face is first displaced rearward, whereby the tip of the lower leg support member protrudes relatively from the vehicle width direction member.
Since the lower leg support member whose rear portion is supported by the vehicle body side strength member receives a load from the front direction, the lower leg support member pays the foot of the pedestrian below the pedestrian's knee and tilts toward the vehicle. There is an effect that the pedestrian can be surely put on the upper part of the hood and a secondary obstacle can be prevented.

Further, the strength setting of the lower leg support member described above.
(Setting of load characteristics) can ensure the safety of the pedestrian's leg (do not give a fracture), have the effect of simple structure and no malfunction, and have no restrictions on the design of the bumper, assembling It is also possible to improve the performance.

According to the twelfth aspect of the present invention, in addition to the effect of the eleventh aspect, the above-mentioned vehicle width direction member is set to the bumper reinforcement, so that the existing member is effectively used. There is an effect that can be.

According to the thirteenth aspect of the present invention, in addition to the effect of the eleventh aspect, the energy absorption amount of the lower leg support member is reduced by the energy provided at the front portion of the vehicle width direction member. Since the energy absorption amount of the absorbing member is set to be larger than that of the absorbing member, the pedestrian can reliably remove the foot from the lower leg portion, and the impact energy of the knee portion of the pedestrian who leans toward the vehicle side is applied to the energy absorbing member. Has the effect of being able to absorb well.

According to the fourteenth aspect of the present invention, in addition to the effect of the thirteenth aspect, the energy absorbing member is constituted by a rib provided integrally with the bumper face. The absorption amount can be increased, and the adjustment of the energy absorption amount can be easily performed by controlling the rib thickness and the rib density.

According to the fifteenth aspect of the present invention, in addition to the effect of the thirteenth or fourteenth aspect, a predetermined interval is provided between the energy absorbing rib and the bumper reinforcement. Therefore, when the bumper face is displaced rearward (at the time of collision between the vehicle and the pedestrian), the lower leg support member can be reliably protruded, and as a result, the pedestrian can be reliably removed from the lower leg. is there.

According to the sixteenth aspect of the present invention, in addition to the effect of the eleventh aspect, the lower leg support member is formed of a rib, the thickness of the upper rib is reduced, and the thickness of the lower rib is reduced. Since the thickness of the rib is set to be large, it is possible to secure the bending of the lower leg support member when a load is input from the road side, which is advantageous in relation to the approach angle. If the rib thickness is large both in the upper and lower directions, the bending of the lower leg support member is hindered.

According to the seventeenth aspect of the present invention, in addition to the effect of the eleventh aspect of the present invention, the lower leg support member is constituted by a rib, the interval between the upper ribs is made coarse, and the lower rib is formed. , The deflection of the lower leg support member can be ensured when a load is input from the road side, which is effective in relation to the approach angle. In the case where the rib intervals are tight both in the upper and lower directions, the bending of the lower leg support member is hindered.

According to the eighteenth aspect of the present invention, in addition to the effect of the thirteenth, fourteenth, or fifteenth aspect, the energy absorbing member has a front rib and a rear rib, Since the front rib is formed so as to have a small energy absorption amount and the rear rib has a large energy absorption amount, the collision shock is relieved in its initial stage, and thereafter, there is an effect that a reliable energy absorption amount can be obtained. In particular, a substantially step-like energy absorption characteristic can be obtained, the energy absorption amount can be increased as a whole, and the use of ribs has an effect that the energy absorption load can be easily adjusted.

According to the nineteenth aspect of the present invention, the thickness of the front rib is set to be small and the thickness of the rear rib is set to be large, in addition to the effect of the invention of the eighteenth aspect. ,
There is an effect that a reliable energy absorption amount can be secured while relieving the collision shock at the beginning of the collision.

According to the twentieth aspect of the present invention, in addition to the effect of the eighteenth aspect, the interval between the front ribs is set coarse and the interval between the rear ribs is set dense.
There is an effect that a reliable energy absorption amount can be secured while relieving the collision shock at the beginning of the collision.

[0068]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to the drawings. The drawing shows a front body structure of the vehicle. In FIG. 1, a bonnet 1 extending in the front-rear direction of the vehicle is provided, and the hood 1 covers an upper part of an engine room.

The bonnet 1 has a bonnet reinforcement 2, and a radiator grill 4 is disposed between a lower part of the front end of the bonnet 1 and an upper part of a bumper face 3 made of resin.

On the other hand, as shown in FIGS. 1 and 2, left and right front side frames 5 and 5 are provided as body frames extending in the front-rear direction of the vehicle, and bumpers are provided at front ends of these front side frames 5 and 5. A bumper reinforcement 7 is attached via brackets 6 and 6.

The bumper reinforcement 7 is a member extending in the vehicle width direction (that is, a vehicle width direction member), and an energy absorbing member 8 is attached to the front of the bumper reinforcement 7 at the same height position. The energy absorbing member 8 is a member extending in the vehicle width direction over substantially the entire width in the longitudinal direction of the bumper face 3 on the inner rear surface of the bumper face 3. Equivalent to height.

Here, a front bumper 9 is constituted by the bumper face 3, the bumper bracket 6, the bumper reinforcement 7, and the energy absorbing member 8, and the front bumper 9 is located at a lower front part of the hood 1 extending forward. .

On the other hand, a front cross member 10 (so-called No. 1 cross member) is provided as a vehicle body-side strength member extending in the lateral direction (vehicle width direction) of the vehicle body, and the front cross member 10 is provided with a bracket 11 such as a radiator shroud member. Connected.

The above-mentioned front cross member 10 is provided with a protruding member 12 whose rear end is supported.
2 protrudes substantially horizontally forward from the front cross member 10 at the lower part of the front bumper 9, and the tip (front end) of the protruding member 12 protrudes forward beyond the bumper reinforcement 7, further absorbing energy. Member 8
It is set to a position substantially the same as the front and rear or a position protruding forward.

In the embodiment shown in FIG. 1, the tip of the protruding member 12 is configured to protrude forward from the energy absorbing member 8. The height of this protruding member 12 is below the pedestrian's leg.
(A member below the knee). In addition, the above energy absorbing member 8 is
And the front end of the protruding member 12 with respect to the line L.

Here, the above-mentioned projecting member 12 is formed so as to cover the entire width in the vehicle width direction under the bumper face 3, and this projecting member 12 is made of synthetic resin such as PP (polypropylene), PE (polyethylene) or ABS resin. It is formed as shown in FIG.

That is, the above-mentioned protruding member 12 is provided at predetermined intervals in the front-rear direction between the left and right frame portions 13, 14, and the frame portions 13, 14, 15, 16 surrounding the left, right, front and rear four sides. Ribs 17 in the lateral direction (vehicle width direction) and frame portions 13-1
6, a plurality of ribs 18, 1 extending in the slant direction
9, a support piece 20 as a support part formed upward from the upper part of the rear frame part 16, and a reinforcing part 21 connecting the support piece 20 and the front frame part 15; A resin structure (honeycomb structure) formed integrally with the resin and having a substantially fan-shaped overall shape when viewed from the plane.

This resin structure is made up of the frame portions 13 to 16 and the rib 1
The load characteristics can be set according to the thickness of 7 to 19, the rib density, and the direction of the rib. Note that the above-described reinforcing portion 21 may be omitted.

The protruding member 12 thus configured is shown in FIG.
As shown in FIG. 2, a support piece 20 located at the rear portion is attached to the front surface of the front cross member 10 so as to receive a load acting from a front direction indicated by an arrow x in FIG.

The load characteristics of the protruding member 12 and the energy absorbing member 8 are set as shown in FIGS.

FIG. 4 is a characteristic diagram showing the load characteristics of the projecting member 12 by taking the deformation amount (crush amount) on the horizontal axis and the load (dynamic crush load) on the vertical axis. In the characteristic a, the deformation amount gradually increases within a small value when the input load (unit Newton) is from zero to the predetermined load c, but when the input load reaches the predetermined load c, the deformation amount becomes maximum and constant. It is set as follows.

On the other hand, FIG. 5 is a characteristic diagram showing the load characteristics of the energy absorbing member 8 by taking the amount of deformation (amount of crushing) on the horizontal axis and the load (dynamic crushing load) on the vertical axis. The load characteristic b of the member 8 is set such that the load (unit Newton) and the deformation amount are proportional. That is, the energy absorption amount of the projecting member 12 (see the characteristic a in FIG. 4) is set to be larger than the energy absorption amount of the energy absorbing member 8 (see the characteristic b in FIG. 5).

In this embodiment, the energy absorbing member 8 described above is used.
EA foam such as styrofoam (energy
(Absorber form). The above-mentioned energy absorbing member 8 made of EA foam may have a solid structure in cross section, a hollow structure, or a structure having a plurality of ribs. Even so, the load characteristics b shown in FIG. 5 are ensured. In addition,
In the figure, reference numeral 22 denotes a front wheel. In addition, the above bumper face 3
Are mounted on the vehicle front member such as the radiator grille 4, the front fender or the front cross member 10, and the other vehicle body side.

The operation of the vehicle body structure thus constructed will be described. When a vehicle and a pedestrian collide,
A load (see arrow x) from the front is input to the protruding member 12 via the resin bumper face 3. This load is usually less than the predetermined load c shown in FIG. 4, and the input load from the front is received by the protruding member 12 whose rear portion is supported by the front cross member 10.

Therefore, at the time of collision between the vehicle and the pedestrian,
First, after the pedestrian's foot is swung below the pedestrian's knee by the above-described projecting member 12, and the impact energy of the knee of the pedestrian leaning toward the vehicle is absorbed by the energy absorbing member 8 extending in the vehicle width direction, The pedestrian is securely placed on the upper part of the hood 1 to protect it.

According to the embodiment shown in FIGS. 1 to 5 (embodiments corresponding to claims 1 to 6 and 8 to 9), the vehicle width direction member (see the bumper reinforcement 7) can be used. An energy absorbing member 8 is provided in the portion, and a projecting member 12 is provided at a lower portion of the front bumper 9 so that a tip thereof projects forward from a vehicle width direction member (refer to a bumper reinforcement 7). In the event of a collision with a pedestrian, first the pedestrian's foot is swept below the pedestrian's knee by the above-mentioned projecting member 12, and then the impact energy of the pedestrian's knee that tilts toward the vehicle is transferred to the above-mentioned energy absorbing member. After the absorption in step 8, the pedestrian can be surely put on the upper part of the bonnet 1 to prevent a secondary obstacle.

Further, by setting the strength of the protruding member 12 (setting of the load characteristic), it is possible to ensure the safety of the pedestrian's leg (to prevent a fracture), and to have an effect that the structure is simple and there is no malfunction. .

In addition, since the above-described vehicle width direction member is set as the bumper reinforcement 7, there is an effect that an existing member (bumper reinforcement 7) extending in the vehicle width direction can be effectively used.

Also, since the distal end of the above-mentioned projecting member 12 is located forward or rearward from the tip of the energy absorbing member 8, the projecting member 12 lowers the knee of the pedestrian when the vehicle and the pedestrian collide. Has the effect that the foot of the pedestrian can be surely paid.

Further, the energy absorbing member 8 is a line L connecting the tip of the bonnet 1 and the tip of the projecting member 12.
(Refer to FIG. 1), the impact energy of the knees of the pedestrian leaning toward the vehicle is more effectively absorbed by the energy absorbing member 8 described above, and the pedestrian's legs are impacted. There is an effect that can be protected from.

In addition, since the energy absorption amount of the projecting member 12 (see the characteristic a in FIG. 4) is set larger than the energy absorption amount of the energy absorbing member 8 (see the characteristic b in FIG. 5), There is an effect that the pedestrian can be reliably removed from the lower leg by the member 12.

Further, since the projecting member 12 is formed of a resin member, the moldability of the projecting member 12 and the assembling property of the projecting member 12 to the vehicle are improved, and
This has the effect of improving the responsiveness to the vehicle design.

Further, since the above energy absorbing member 8 is constituted by any one of the energy absorber member, the resin structure and the damping device (in this embodiment, constituted by the EA member), the pedestrian hits the bonnet 1. The energy absorbing member 8 can reliably absorb the energy at the stage before the contact, and can reduce the tilting speed of the pedestrian, and can more reliably put the pedestrian on the upper part of the hood 1. There is an effect that can be done.

Further, since the above-mentioned projecting member 12 is attached to the vehicle-body-side strength member (refer to the front cross member 10) at the front of the vehicle body, the load from the front when the vehicle and the pedestrian collide (see FIG. 1). (See the arrow x) is received by the vehicle body strength member, so that the pedestrian 12 can reliably remove the foot by the protruding member 12 and also has an effect that sufficient supporting strength of the protruding member 12 can be secured.

In addition, since the above-mentioned projecting member 12 is set to a strength that does not cause damage to the foot of the pedestrian in the event of a collision, it is necessary to ensure the safety of the lower leg portion when the projecting member 12 removes the foot of the pedestrian. There is an effect that can be.

Further, as shown in the embodiment, when the above-mentioned projecting member 12 is formed of a resin structure (honeycomb structure), the collision area between the vehicle and the pedestrian can be any part of the front bumper 9 in the vehicle width direction. However, there is an effect that the same foot sweeping effect and impact energy absorbing effect can be obtained, and if the projecting member 12 is formed of a resin member, the projecting member 12 bends when a load is input from below to above, so that This is advantageous in relation to the approach angle. The value of the predetermined load c in the load characteristic a of the protruding member 12 shown in FIG. 4 is set to a predetermined value that does not cause a fracture to the pedestrian's leg.

FIGS. 6 and 7 show another embodiment of the front body structure of the vehicle. In the previous embodiment, the rear part of the protruding member 12 was supported by the front cross member 10, but FIGS. In this embodiment, a perimeter frame (frame type frame) 23 having both sides attached thereto is provided below the front side frame 5, and a set bolt is provided between the front ends 23a of the perimeter frame (vehicle-side strength member) 23. A set plate 25 is mounted using the set 24, and the rear portion of the above-described protruding member 12 is supported by the set plate 25. Other configurations are the same as in the previous embodiment.

[0098] The configuration (claims 1 to 6, 8 to 10)
6), the same functions and effects as those of the previous embodiment can be obtained. Therefore, in FIGS. 6 and 7, the same parts as those in the previous figures are denoted by the same reference numerals, and detailed description thereof will be omitted.

FIGS. 8 and 9 show still another embodiment of the front body structure of the vehicle.
In this embodiment shown in FIGS. 8 and 9, a metal round bar along the lower part of the bumper face 3, for example, an iron pipe-made member 26, and the side member 26 is formed of a body-side strength. The projecting member 28 is constituted by the supporting arms 27 and 27 supported by the front cross member 10 as a member.

The above-mentioned side member 26 has at least both right and left end portions bent so as to follow the rear surface shape of the bumper face 3. The above-mentioned support arm 27 is formed by a sheet metal member so that its cross section has a gate shape, and is formed so as to obtain the load characteristic a shown in FIG. 4 by the thickness and cross-sectional shape of this sheet metal member.

Further, joint pieces 27a, 27a are formed at the rear end of the support arm 27 by bending, and these joint pieces 27a, 27a are joined and fixed to the front surface of the front cross member 10. Other configurations are the same as in the previous embodiment.

As described above, according to the embodiment shown in FIGS. 8 and 9 (embodiments corresponding to claims 1 to 5 and 7 to 10), the above-mentioned projecting member 28 is provided along the lower portion of the bumper face 3. Since the member 26 and the support member (see the support arm 27) for supporting the side member 26 at the front part of the vehicle body are provided, the above-described protruding member 28 is connected to the side member 26 and the support member (the support arm 27
(See Reference).

Since other functions and effects are substantially the same as those of the previous embodiment, the same reference numerals are given to the same parts in FIGS. Omitted.

FIGS. 10 and 11 show still another embodiment of the front body structure of the vehicle. In each of the above embodiments, the energy absorbing member 8 is made of EA foam such as styrene foam. In this embodiment shown in FIG. 11, the energy absorbing member 29 is formed integrally with the bumper face 3 by a resin structure.

That is, a plurality of ribs 3 extending in the vehicle width direction at predetermined intervals in the up-down direction are provided on a portion corresponding to the height of the pedestrian's knee on the back surface of the bumper face 3 made of resin.
A plurality of ribs 31... Extending in the vertical direction at predetermined intervals in the left-right direction are provided, and a resin structure 32 is formed by a combination of these ribs 30, 31.

The energy absorbing member 29 is provided at substantially the same height as the bumper reinforcement 7.
Further, the above-described energy absorbing member 29 is located forward of a line L connecting the tip of the bonnet 1 and the tip of the protruding member 12.

Thus, the thickness of each of the ribs 30, 31 described above,
The energy absorbing member 29 is formed so as to obtain the load characteristic b shown in FIG. 5 according to the rib density and the direction of the ribs 30, 31. Other configurations are the same as in the previous embodiment.

With this configuration (claims 1 to 6, 8 to 10)
In this case, the energy absorbing member 29 can be integrated with the bumper face 3 made of resin, which has the effect of reducing the number of assembly steps and the number of parts.

Since other functions such as the energy absorbing effect are substantially the same as those of the previous embodiment, the same reference numerals are given to the same parts in FIGS. , And detailed description thereof will be omitted.

FIG. 12 shows still another embodiment of the vehicle body front structure. In this embodiment, the energy absorbing member 34 is constituted by the oil damper 33. That is, the oil dampers 33, 33 are attached to the lower part of the front side frames 5, 5 or the peripheral part thereof, and the bumper reinforcement 7 is connected to the tip of the piston rods 33a, 33a of the oil dampers 33, 33 so as to be able to retreat. The oil damper 33 is used to obtain the load characteristic b shown in FIG.

The structure shown in FIG. 12 (claims 1, 5, 6, 8 to 1)
(Equivalent to 0), when a collision occurs between the vehicle and the pedestrian, a load (see arrow x) from the front is input to the protruding member 12 via the bumper face 3 made of resin. This load is usually less than the predetermined load c shown in FIG. 4, and the input load from the front is received by the protruding member 12 whose rear portion is supported by the front cross member 10.

Therefore, when a vehicle and a pedestrian collide,
First, the pedestrian's foot is swung below the pedestrian's knee by the above-mentioned projecting member 12, and the impact energy of the pedestrian's knee that leans toward the vehicle is reduced by the oil damper 33 to the rear of the bumper reinforcement 7. After being absorbed by the operation, the pedestrian can be reliably put on the upper part of the hood 1 and protected thereafter.

Since other functions and effects are substantially the same as those of the previous embodiment, the same reference numerals in FIG. 12 denote the same parts as in the previous figure, and a detailed description thereof will be omitted.

FIG. 13 shows still another embodiment of the front body structure of the vehicle. However, in FIG. 13, the same parts as those in the previous figure are denoted by the same reference numerals, and detailed description thereof will be omitted. In the embodiment shown in FIG. 13, the bumper face 3 made of resin is used.
An energy absorbing member 40A is integrally provided on the back surface of the bumper face 3 and in front of the bumper reinforcement 7 (vehicle width direction member) so as to correspond to the height position of the pedestrian's knee. .

In the front bumper 9 including the bumper face 3, the bumper reinforcement 7, and the energy absorbing member 40A, the lower portion of the back surface of the bumper face 3 extends in the vehicle width direction, and the rear portion thereof has a vehicle body side strength. A lower leg support member 41A supported by the front cross member 10 as an example of a member is integrally provided. The above-mentioned energy absorbing member 40A and lower leg support member 41A
Are integrally provided over the entire width of the front bumper 9 in the longitudinal direction (that is, the vehicle width direction).

Here, the above-mentioned front cross member 10
In place of the front cross member 10, a perimeter frame (see the preceding figure) may be used as the vehicle body side strength member. (Not shown) extending toward the vehicle body may be used as a vehicle-body-side strength member.

As shown in FIG. 13, a predetermined gap g is provided between the back surface of the energy absorbing member 40A and the front surface of the bumper reinforcement 7. Thus, when the bumper face 3 is displaced rearward at the time of collision between the vehicle and the pedestrian, the gap g becomes zero, and the tip of the lower leg support member 41A protrudes relatively from the bumper reinforcement 7. It was done. More specifically, in the normal state shown in FIG.
However, when the bumper face 3 is displaced rearward in the collision between the vehicle and the pedestrian, the above-mentioned gap g becomes zero and the front end of the lower leg support member 41A becomes energy-saving. It is configured to protrude relatively forward from the tip of the absorbing member 40A.

The structure of the energy absorbing member 40A shown in FIG. 13 is shown in FIGS. This energy absorbing member 40
A is made of a synthetic resin (for example, polypropylene) of the same material as the bumper face 3 and is configured to extend in the vehicle width direction of the bumper face 3 in front of the bumper reinforcement 7.

As shown in FIGS. 14 and 15, the energy absorbing member 40A has a main body 42 extending in the vehicle width direction in a vertically oriented state, and a front rib extending forward from the front surface of the main body 42. And a plurality of vertical ribs 44 and a plurality of horizontal ribs 45 as rear ribs extending rearward from the rear surface of the main body 42 described above.
And a plurality of vertical ribs 46.

Further, the front ribs (see the horizontal ribs 43) located on the front side are formed so that the energy absorption is small, and the rear ribs (see the horizontal ribs 45) located on the rear side are absorbed large. I have.

That is, the thickness of the horizontal rib 43 is set to be small and the thickness of the horizontal rib 45 is set to be large. The interval between the upper and lower ribs of the horizontal ribs 45 is set to be dense (small).

In addition to the coarse / dense structure of the rib intervals, the vertical ribs 44, 44 located on the front side have a coarse left / right rib interval, and the vertical ribs 46, 46 located on the rear side have a dense left / right rib interval. Is also good.

The energy absorbing member 40 thus configured
A is integrally fixed to a predetermined portion of the back surface of the bumper face 3 by means such as heat welding. When the energy absorbing member (energy absorbing rib) 40A collides with a small load in FIG.
The front ribs 43 and 44 shown in the range d in FIG. 14 are crushed, and the rear ribs 45 and 46 shown in the range e in FIG. 14 are crushed by a large load. An absorption characteristic f (two-step energy absorption characteristic) is obtained, and the energy absorption amount is generally increased with respect to the characteristic b of the previous embodiment.

Here, FIG. 16 is a characteristic diagram showing the load characteristics of the energy absorbing member 40A by taking the deformation amount (crush amount) on the horizontal axis and the load (dynamic crush load) on the vertical axis. For convenience, the same reference numerals as in FIG. 14 are used.

The structure of the lower leg support member 41A shown in FIG. 13 is shown in FIGS. The lower leg support member 41A is made of a synthetic resin of the same material as the bumper face 3.
(For example, polypropylene), bumper face 3
Is configured to extend in the vehicle width direction along the lower rear surface of the vehicle.

As shown in FIGS. 17, 18, and 19, the lower leg support member 41A includes a front piece 47 extending in the vertical direction, a rear piece 48 extending in the vertical direction, and the two pieces 4 described above.
A main part 50 having a substantially H-shaped cross section is provided by integrally combining a main piece 49 extending in the front-rear direction between the front and rear parts 7 and 48, and a plurality of front and rear parts extending upward from the upper surface of the main piece 49 in the main part 50 are provided. Direction upper ribs 51 and vehicle width direction upper ribs 52, a plurality of front-rear direction lower ribs 53 and a plurality of vehicle width direction lower ribs 54 extending downward from the lower surface of the main piece 49 of the main body 50. Have.

On the upper side of the main piece 49, each element 4
7, 52, 48 front and rear spacing, and upper ribs 51, 5
The left-right space between the first ribs 1 is roughly set, and the front-rear space between the elements 47, 54, 48 and the left-right space between the lower ribs 53, on the lower side of the main piece 49, are set fine.

Further, a clearance c1 (or a notch) is formed between the rear end of the upper rib 51 located on the front side and the front end of the upper rib 52, and a clearance c1 (or a notch) is formed between the rear end and the lower rib 53. End and lower rib 54 or rear side change 4
A clearance c2 (or a notch portion) is formed between the front support 8 and the front surface of the lower leg 8 so as to secure deflection of the lower leg support member 41A when a load is input from the road side. Therefore, it is configured to be effective in relation to the approach angle. That is, the lower leg support member 41 is used to input the load from the road side.
A has a bumper face 3 made of resin, and its tip side is bent upward.

The lower leg support member 41 thus configured
A is integrally fixed to a predetermined portion of the back surface of the bumper face 3 by means such as heat welding.

FIG. 20 shows the load characteristics of the lower leg support member 41A. The horizontal axis indicates the amount of deformation (the amount of crush), and the vertical axis indicates the load.
(Dynamic crushing load). This lower leg support member 4
The load characteristic a of 1A is such that when the input load (Newton) is from zero to a predetermined load c, the deformation amount gradually increases within a small value, but when the input load reaches the predetermined load c, the deformation amount becomes maximum and It is set to be constant.

Further, by changing the thickness and density of each of the ribs 51 to 54, the value of the predetermined load c of the load characteristic a is changed as shown in FIG.
It can be arbitrarily and easily adjusted as indicated by a virtual line at zero.

The lower leg support member 41 shown in FIG.
The energy absorption amount of A (see the load characteristic a in FIG. 20) is set to be larger than the energy absorption amount of the energy absorbing member 40A (see the load characteristic f in FIG. 16). In the figure,
F indicates the front of the vehicle.

The operation of the vehicle body structure thus constructed will be described. When a vehicle and a pedestrian collide,
Since the load indicated by the arrow x in FIG. 13 is input to the front bumper 9, first, the resin bumper face 3 is displaced rearward, the gap g shown in FIG. 13 becomes zero, and the tip of the lower leg support member 41A is Projects relatively forward.

As a result, the lower leg support member 41A lifts the foot of the pedestrian below the pedestrian's knee, and the impact energy of the knee of the pedestrian leaning toward the vehicle is absorbed by the energy absorbing member 40A extending in the vehicle width direction. After absorbing the pedestrian in two stages (see FIG. 16), the pedestrian is surely put on the upper part of the hood 1 and protected.

As described above, the embodiment shown in FIGS.
(After request, 11, 12, 13, 14, 15, 17, 18,
According to the embodiments corresponding to FIGS. 19 and 20, the front bumper 9 including the bumper face 3 and the vehicle width direction member (see the bumper reinforcement 7) located behind the bumper face 3 is provided. A lower leg support member 41A is provided at the lower portion of the bumper 9 and extends in the vehicle width direction and has a rear portion supported by a vehicle body-side strength member (see the front cross member 10). When the bumper face 3 is displaced rearward,
Since the distal end of the lower leg support member 41A is configured to protrude relatively from the vehicle width direction member (see the bumper reinforcement 7), the following effects are obtained.

That is, at the time of collision between the vehicle and the pedestrian, first, the bumper face 3 is displaced rearward, whereby the tip of the lower leg support member 41A protrudes relatively from the vehicle width direction member, and the rear portion is the vehicle body side strength member ( Since the lower leg support member 41A supported by the front cross member 10 receives a load from the front (see the arrow x in FIG. 13), the lower leg support member 41A lowers the pedestrian below the knee of the pedestrian. There is an effect that a pedestrian who leans toward the vehicle can be surely put on the upper part of the bonnet 1 to prevent a secondary obstacle.

In addition, by setting the strength of the lower leg support member 41A (setting the load characteristics), it is possible to ensure the safety of the pedestrian's leg (no fracture is caused), and the structure is simple and there is no malfunction. In addition, there is no design restriction on the front bumper 9, and it is possible to improve the assemblability.

Further, since the above-described vehicle width direction member is set as the bumper reinforcement 7, there is no need to newly provide another member extending in the vehicle width direction, and there is an effect that the existing member can be effectively used.

In addition, the energy absorption amount of the lower leg support member 41A (see FIG. 20) is determined by the energy absorption amount of the energy absorption member 40A provided at the front of the vehicle width direction member (see the bumper reinforcement 7) (see FIG. 20). 16), the pedestrian can be reliably removed from the lower leg, and the impact energy of the knee of the pedestrian who leans toward the vehicle can be improved by the energy absorbing member 40A. There is an effect that can be absorbed.

Moreover, since the energy absorbing member 40A is constituted by the ribs 43 to 46 provided integrally with the bumper face 3, the amount of energy absorption can be increased, and the rib thickness and the rib density can be controlled. Thereby, there is an effect that the adjustment of the energy absorption amount becomes easy.

Further, since a predetermined distance (see the gap g) is provided between the energy absorbing rib (see the energy absorbing member 40A) and the bumper reinforcement 7, when the bumper face 3 is displaced backward (vehicle and pedestrian). At the time of collision), a reliable projecting operation of the lower leg support member 41A can be obtained, and as a result, there is an effect that the pedestrian can be reliably removed from the lower leg portion.

Further, since the lower leg support member 41A is constituted by ribs 51 to 54, the interval between the upper ribs 51 and 52 is set coarse, and the interval between the lower ribs 53 and 54 is set dense.
The deflection of the lower leg support member 41A can be ensured when a load is input from the road side, which is effective in relation to the approach angle. In the case where the rib intervals are tight both in the upper and lower directions, the bending of the lower leg support member is hindered.

On the other hand, the above-mentioned energy absorbing member 40A has front ribs 43, 44 and rear ribs 45, 46, and the front ribs 43, 44 absorb a small amount of energy, and the rear ribs 4
Since the energy absorption amounts of 5, 46 are made large, the collision shock (knee impact energy) is relieved at the initial stage, and thereafter, there is an effect that a reliable energy absorption amount can be obtained. In particular, a substantially step-like energy absorption characteristic f (FIG. 16)
) Can be obtained, the energy absorption amount can be increased as a whole, and the use of the ribs has an effect that the energy absorption load can be easily adjusted.

Further, the thickness of the front ribs 43 and 44 in the energy absorbing member 40A is set to be small, and the thickness of the rear ribs 45 and 46 is set to be large. There is an effect that the absorption amount can be secured.

Further, in the energy absorbing member 40A,
The intervals between the front ribs 43 and 44 are roughly set, and the rear ribs 45 and 46 are
Are set densely, so that there is an effect that a reliable energy absorption amount can be secured while relieving the collision shock at the beginning of the collision.

FIGS. 21 and 22 show another embodiment of the energy absorbing member (energy absorbing rib) integrally welded and fixed to the rear surface of the bumper face 3 so as to face the bumper reinforcement 7.

The energy absorbing member 40B is made of a synthetic resin (for example, polypropylene) of the same material as the bumper face 3 and is configured to extend in the vehicle width direction of the bumper face 3 in front of the bumper reinforcement 7.

As shown in FIGS. 21 and 22, the energy absorbing member 40B has a main body 55 extending in the vehicle width direction in a vertically oriented state, and a front rib extending forward from the front surface of the main body 55. And a plurality of vertical ribs 57, and a plurality of horizontal ribs 58 as rear ribs extending rearward from the rear surface of the main body 55 described above.
And a plurality of vertical ribs 59.

[0149] Here, the horizontal rib 56 extending forward is formed in a tapered shape in which the front end is narrow and the rear end is wide. In addition, the front ribs (see horizontal ribs 56) located on the front side have a small amount of energy absorption, and the rear ribs (see horizontal ribs 58) located on the rear side have a large amount of energy absorption.

That is, the thickness (cross-sectional area) of the horizontal rib 56 is set to be small, the thickness (cross-sectional area) of the horizontal rib 58 is set to be large, and the distance between the right and left ribs of the vertical ribs 57, 57 located on the front side is set. The left and right rib intervals of the vertical ribs 59, 59 located on the rear side are set densely (small). The energy absorbing member 40B thus configured is integrally joined and fixed to a predetermined portion on the back surface of the bumper face 3 by means such as heat welding.

This energy absorbing member (energy absorbing rib)
In the case of 40B, the front ribs 56 and 57 shown in the range m in FIG. 21 are crushed with a small load at the time of collision, and the rear ribs 58 and 59 shown in the range n in FIG. 23, a substantially step-like energy absorption characteristic h (two-stage energy absorption characteristic) as shown in FIG. 23 is obtained, and the energy absorption amount is generally increased with respect to the characteristic b of the previous embodiment. Make up.

Here, FIG. 23 is a characteristic diagram showing the load characteristics of the energy absorbing member 40B by taking the deformation amount (crush amount) on the horizontal axis and the load (dynamic crush load) on the vertical axis. For convenience, the same reference numerals as in FIG. 21 are assigned. 21 to 23
The energy absorbing member 40B (claims 18, 19, 2)
0), almost the same operation as the previous embodiment,
It is effective.

FIGS. 24, 25 and 26 show still another embodiment of an energy absorbing member (energy absorbing rib) which is integrally welded and fixed to the rear surface of the bumper face 3 so as to face the bumper reinforcement 7. .

The energy absorbing member 40C is formed of a synthetic resin (for example, polypropylene) of the same material as the bumper face 3 and is configured to extend in the vehicle width direction of the bumper face 3 in front of the bumper reinforcement 7.

As shown in FIGS. 24, 25 and 26, the above-described energy absorbing member 40C has a main body 60 extending in the vehicle width direction in a vertically oriented state, and a multi-step from the front surface of the main body 60. A plurality of horizontal ribs 61, 6 extending forward
2, 63, 64 and vertical ribs 65, 66, 67 extending vertically between these horizontal ribs.

Here, each of the ribs 61, 62, 65 acts as a front rib, each of the ribs 63, 66 acts as an intermediate rib, and each of the ribs 64, 67 acts as a rear rib. This energy absorbing member (energy absorbing rib) 40C
In the case of a collision, a portion indicated by a range r in FIG. 24 is crushed by a small load, a portion indicated by a range s in FIG. 24 is crushed by a medium load, and a portion indicated by a range t in FIG. Is collapsed, so that a substantially step-like energy absorption characteristic j (three-stage energy absorption characteristic) as shown in FIG. 27 is obtained. It is configured as shown.

FIG. 27 is a characteristic diagram showing the load characteristics of the energy absorbing member 40C by taking the amount of deformation (amount of crush) on the horizontal axis and the load (dynamic crush load) on the vertical axis. ,
The same reference numerals as in FIG. 24 are used.

The energy absorbing member 40 thus configured
C is integrally fixed to a predetermined portion of the back surface of the bumper face 3 by means such as heat welding. Even when the energy absorbing member 40C (corresponding to claims 14 and 18) shown in FIGS. 24 to 27 is used, substantially the same operation and effect as in the previous embodiment can be obtained.

FIGS. 28, 29 and 30 show another embodiment of the lower leg support member whose rear portion is supported by the vehicle body side strength member. 28 to 30, the same parts as those in FIGS. 17 to 19 are denoted by the same reference numerals. However, in the case of this embodiment, the lower leg support member 41B is constituted by a rib,
The thickness of the upper rib 52 is set small, and the thickness of the lower rib 54 is set large.

In the embodiment shown in FIGS.
According to the embodiment, the lower leg support member 41B is constituted by the ribs 51 to 54, the thickness of the upper rib 52 is set to be small, and the thickness of the lower rib 54 is set to be large. At the time of load input, the lower leg support member 41B can secure the bending, and in relation to the approach angle,
This is advantageous. By the way, when the rib thickness is large both up and down,
Deflection of the lower leg support member is hindered. In other respects, the operation and effect are almost the same as those of the previous embodiment.

FIGS. 31, 32 and 33 show still another embodiment of the lower leg support member whose rear portion is supported by the vehicle body side strength member. 17 to 19 in FIGS.
The same parts as in FIG.

In the embodiment shown in FIGS. 31 to 33, a main portion 50 having a substantially H-shaped cross section is provided, and a plurality of front-rear upper ribs 68 extending upward from the upper surface of the main piece 49 of the main portion 50. 69, 70 and upper rib 7 in the vehicle width direction
1, 72, and a plurality of lower ribs 73, 7 in the front-rear direction extending downward from the lower surface of the main piece 49 of the main body 50.
4, 75, 76 and a plurality of lower ribs 77 in the vehicle width direction.
78 and 79 are provided.

On the upper side of the main piece 49, each element 4
7, 71, 72, 48, the front and rear spacing, and the upper rib 6
The left and right intervals between 8, 68, 69, 69, 70, 70 are roughly set, and each element 4
7, 77, 78, 79, 48, and lower ribs 73, 73, 74, 74, 75, 75, 76,
The interval between the left and right is set densely.

Further, the upper ribs 68, 70 are
The height of the upper rib 69, which is set to be substantially flush with the upper end portions of the upper ribs 1, 72, is located at the middle in the front-rear direction.
The height is set to be less than 8,70 (in this embodiment, about half the height).

Similarly, the lower ribs 73 and 76 are
The protrusion amounts are set to be substantially flush with the lower end portions of 7, 78, 79, and the protrusion amounts of the lower ribs 74, 75 located in the middle in the front-rear direction are smaller than the protrusion amounts of the lower ribs 73, 76 (in this embodiment, (Approximately 1/2 protrusion amount). That is, the above-described ribs 69, 74, and 75 are set as deflection allowance securing means.

By setting the height of the upper rib 69 located in the middle in the front-rear direction and the projecting amounts of the lower ribs 74 and 75 to small values as described above, FIGS.
Without having the clearances c1 and c2 of FIG.
The configuration is such that the same operation as when the clearances c1 and c2 are provided is obtained.

That is, by setting the height of the upper rib 69 to be low and the projecting amounts of the lower ribs 74 and 75 to be small,
The configuration is such that when the load is input from the road side, the bending of the lower leg support member 41C is ensured, so that the lower leg support member 41C is enabled in relation to the approach angle.

The lower leg support member 41 thus configured
C is integrally fixed to a predetermined portion of the back surface of the bumper face 3 by means such as heat welding. Even if the lower leg support member 41C (corresponding to claims 13 and 17) shown in FIGS. 31 to 33 is used, substantially the same operation and effect as in the previous embodiment can be obtained.

In each of the embodiments shown in FIGS. 13 to 33, the ribs of the energy absorbing members 40A, 40B, 40C and the lower leg support members 41A, 41B, 41C are formed in a grid pattern at a crossing angle of 90 degrees. In other words, the case where the ribs are combined in a cross shape is exemplified,
The ribs may be combined or formed in a honeycomb shape, and further, at least a part of the rib may be configured to be inclined at a predetermined angle to form a constant load.

The energy absorbing members 40A, 40B, 40C and the lower leg support members 41A, 41B, 41C provided integrally with the bumper face 3 are arbitrarily selected from those of the embodiments, for example, a combination of 40A and 41C. 40B
And 41A can be arbitrarily configured.

Further, the lower leg support members 41A, 41B,
Any one of 41C may be combined with the energy absorbing member 8 described above. In addition, the bumper face 3, the energy absorbing members 40A, 40B, 40C, and the lower leg support member 4
In the configuration in which 1A, 41B and 41C are integrated, other joining means such as an adhesive means may be used instead of the welding means.

In correspondence between the configuration of the present invention and the above-described embodiment, the bumper of the present invention corresponds to the front bumper 9 of the embodiment, and similarly, the vehicle width direction member is connected to the bumper reinforcement 7. The support member corresponds to the support arm 27, the damping device corresponds to the oil damper 33, the vehicle body side strength member corresponds to the front cross member 10, the perimeter frame 23 or the stay, and the energy absorbing rib and the bumper Although the predetermined interval between the reinforcement and the reinforcement corresponds to the gap g, the present invention is not limited to the configuration of the above-described embodiment.

For example, as the constituent material of the above-mentioned resin projecting member 12, a nylon resin may be used instead of PP and PE. Further, instead of the structure in which the support arm 27 is formed of a sheet metal member, the arm 27 may be formed of a resin structure, and the side member 26 may be formed of a resin round bar instead of a metal round pipe. Of course.

Further, the bumper face 3, the energy absorbing members 40A, 40B, 40C, the lower leg support member 41
The resin materials constituting A, 41B and 41C are not limited to PP.

[Brief description of the drawings]

FIG. 1 is a side view showing a front body structure of a vehicle according to the present invention.

FIG. 2 is a schematic perspective view of a main part of FIG.

FIG. 3 is a perspective view showing a configuration of a protruding member.

FIG. 4 is an explanatory diagram showing load characteristics of a protruding member.

FIG. 5 is an explanatory diagram showing load characteristics of the energy absorbing member.

FIG. 6 is a side view showing another embodiment of the front body structure of the vehicle according to the present invention.

FIG. 7 is a perspective view of a perimeter frame.

FIG. 8 is a side view showing still another embodiment of the front vehicle body structure of the vehicle according to the present invention.

FIG. 9 is a perspective view of a main part of FIG. 8;

FIG. 10 is a side view showing still another embodiment of the front vehicle body structure of the vehicle according to the present invention.

FIG. 11 is a perspective view of a main part of FIG. 10;

FIG. 12 is a side view showing still another embodiment of the front vehicle body structure of the vehicle according to the present invention.

FIG. 13 is a side view showing still another embodiment of the front vehicle body structure of the vehicle according to the present invention.

FIG. 14 is an enlarged sectional view of a main part of FIG. 13;

FIG. 15 is a partial perspective view of the energy absorbing member.

FIG. 16 is an explanatory diagram showing load characteristics of the energy absorbing member.

FIG. 17 is an enlarged sectional view of a main part of FIG. 13;

FIG. 18 is a cross-sectional view taken along line DD of FIG. 17;

FIG. 19 is a sectional view taken along line EE of FIG. 17;

FIG. 20 is an explanatory diagram showing load characteristics of a lower leg support member.

FIG. 21 is a sectional view showing another embodiment of the energy absorbing member.

FIG. 22 is a partial perspective view of the energy absorbing member.

FIG. 23 is an explanatory diagram showing load characteristics of the energy absorbing member.

FIG. 24 is a sectional view showing another embodiment of the energy absorbing member.

FIG. 25 is a partial perspective view of the energy absorbing member.

FIG. 26 is a front view of the energy absorbing member.

FIG. 27 is an explanatory diagram showing load characteristics of the energy absorbing member.

FIG. 28 is a sectional view showing another embodiment of the lower leg support member.

FIG. 29 is a sectional view taken along line GG of FIG. 28;

FIG. 30 is a cross-sectional view taken along line HH of FIG. 28;

FIG. 31 is a sectional view showing another embodiment of the lower leg support member.

FIG. 32 is a sectional view taken along line PP of FIG. 28;

FIG. 33 is a sectional view taken along line QQ of FIG. 28;

[Explanation of symbols]

 L ... Line 1 ... Bonnet 3 ... Bumper face 7 ... Bumper reinforcement (vehicle width direction member) 8 ... Energy absorbing member 9 ... Front bumper (bumper) 10 ... Front cross member (strength member) 12 ... Protruding member 23 ... Perimeter Frame (strength member) 26 ... side member 27 ... support arm (support member) 28 ... projecting member 29 ... energy absorbing member 32 ... resin structure 33 ... oil damper (damping device) 34 ... energy absorbing member 40A, 40B, 40C ... Energy absorbing members 41A, 41B, 41C Lower leg support members 43-46 Ribs 51-54 Ribs 56-59 Ribs 61-67 Ribs 68-79 Ribs g Gap (predetermined intervals)

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Hiroshi Tsukiji 3-1 Shinchi, Fuchu-cho, Aki-gun, Hiroshima Mazda Co., Ltd. (72) Inventor Masao Hara 3-1 Shinchi, Fuchu-cho, Aki-gun, Hiroshima Mazda Co., Ltd. (72) Inventor Yuji Matsuda 3-1 Shinchi, Fuchu-cho, Aki-gun, Hiroshima Mazda Co., Ltd. (72) Inventor Daisaburo 3-1 Shinchi, Fuchu-cho, Aki-gun, Hiroshima Mazda Co., Ltd.

Claims (20)

[Claims] 1. A front body structure of a vehicle provided with a bumper at a lower front portion of a hood of the vehicle, wherein a vehicle width direction member at a front portion of the vehicle body and an energy absorbing member provided at a front portion of the vehicle width direction member are provided. A front vehicle body structure for a vehicle, comprising: a member; and a protruding member whose front end protrudes forward by a vehicle width direction member provided below the bumper. 2. The front body structure of a vehicle according to claim 1, wherein the vehicle width direction member at the front of the vehicle body is set to a bumper reinforcement. 3. A front body structure for a vehicle according to claim 1, wherein a tip end of said projecting member is located forward or rearward of a tip end of said energy absorbing member. 4. The front body structure of a vehicle according to claim 1, wherein said energy absorbing member is located forward of a line connecting a tip of the bonnet and a tip of the projecting member. 5. The front body structure of a vehicle according to claim 1, wherein an energy absorption amount of said projecting member is set to be larger than an energy absorption amount of said energy absorbing member. 6. A front body structure for a vehicle according to claim 1, wherein said projecting member is formed of a resin member. 7. The front body structure of a vehicle according to claim 1, wherein said projecting member includes a side member along a lower portion of the bumper face, and a supporting member for supporting the side member at a front part of the vehicle body. 8. The front body structure of a vehicle according to claim 1, wherein said energy absorbing member comprises one of an energy absorber member, a resin structure, and a damping device. 9. A front body structure for a vehicle according to claim 1, wherein said projecting member is attached to a vehicle body-side strength member at a front portion of the vehicle body. 10. The front body structure of a vehicle according to claim 1, wherein said projecting member is set to a strength that does not cause damage to a foot of a pedestrian in a collision. 11. A front body structure of a vehicle having a bumper at a front lower portion of a hood of the vehicle, wherein the bumper includes a bumper face and a vehicle width direction member located behind the bumper face. A lower leg support member extending in the vehicle width direction and having a rear portion supported in the absence of vehicle body strength is provided at a lower portion of the bumper, and when the bumper face is displaced rearward, the tip of the lower leg support member is relatively positioned relative to the vehicle width direction member. The front body structure of the vehicle that is configured to protrude into the vehicle. 12. The front body structure for a vehicle according to claim 11, wherein said vehicle width direction member is set to a bumper reinforcement. 13. An energy absorbing member provided at a front portion of said vehicle width direction member, wherein an energy absorption amount of said lower leg support member is set to be larger than an energy absorption amount of said energy absorbing member. Car body structure at the front. 14. The front body structure of a vehicle according to claim 13, wherein said energy absorbing member is constituted by a rib provided integrally with a bumper face. 15. The energy absorbing member according to claim 1, wherein the energy absorbing member comprises an energy absorbing rib, and a predetermined space is provided between the energy absorbing rib and the bumper reinforcement.
15. The front body structure of a vehicle according to 3 or 14. 16. The front body structure of a vehicle according to claim 11, wherein said lower leg support member is constituted by a rib, and an upper rib has a small thickness and a lower rib has a large thickness. 17. The front body structure of a vehicle according to claim 11, wherein said lower leg support member is constituted by a rib, and a distance between upper ribs is set roughly and a distance between lower ribs is set densely. 18. The energy absorbing member according to claim 13, further comprising a front rib and a rear rib, wherein the front rib has a small amount of energy absorption and the rear rib has a large amount of energy absorption. 16. The front body structure of a vehicle according to 14 or 15. 19. The front body structure of a vehicle according to claim 18, wherein said front rib has a small thickness and said rear rib has a large thickness. 20. The front vehicle body structure for a vehicle according to claim 18, wherein the rib intervals of the front ribs are set coarse and the rib intervals of the rear ribs are set dense.