JP4479637B2 - Bumper structure for vehicles - Google Patents

Description

  The present invention relates to a vehicle bumper structure for protecting a body to be collided against a vehicle body at the time of a vehicle collision.

  A lower shock absorber is arranged inside the lower part of the bumper fascia (bumper cover), and the lower part of the leg of the pedestrian is scooped up by the lower shock absorber at the time of collision with the pedestrian, so that the pedestrian's knee is centered. A technique is known in which the leg portion is protected from an impact at the time of collision (see, for example, Patent Document 1).

In this technology, the lower shock absorber includes a base plate whose front end is curved along the inner surface of the bumper fascia, and a plurality of vertical shock absorbers which are erected upward from the base plate in parallel in the vehicle width direction. The vertical rib, the horizontal rib orthogonal to the central portion of the vertical rib, and a rim portion and an attachment portion that are fixed to the lower frame that is the vehicle body skeleton. The rear end of each vertical rib including the side wall of the rim portion reaches the front surface of the lower frame.
JP 2002-274298 A Japanese Patent Laid-Open No. 7-17341

  By the way, because the bumper fascia constitutes the design of the car body, the inclination angle with respect to the horizontal plane increases toward the road surface toward the lower part, and the force that lifts the front part of the lower shock absorber by the collision with the leg part Works. In the technique described in Patent Document 1, since the rear ends of the vertical ribs reach the lower frame, a reaction force can be generated when the legs collide.

  However, in the above conventional technique, the rear ends of the vertical ribs reach the lower frame, which causes various restrictions.

  In view of the above facts, an object of the present invention is to obtain a vehicular bumper structure that generates an appropriate reaction force when a bumper collides with a collision target with a simple structure.

In order to achieve the above object, a vehicle bumper structure according to the invention of claim 1 is provided:
A bumper structure for a vehicle in which a lower support member that is elongated in a vehicle width direction and is fixed to a vehicle body skeleton member at one end side in a vehicle longitudinal direction is disposed at a lower portion of the bumper, and the lower support member is , from the other end of the base plate whose one end in the longitudinal direction of the vehicle body is fixed to the vehicle body frame member, are erected a plurality of longitudinal ribs that are long in the longitudinal direction of the vehicle body respectively in parallel in a vehicle width direction, wherein The vehicle body skeleton member side end portions of the plurality of vertical ribs and the vehicle body skeleton member are spaced apart in the vehicle body longitudinal direction, and the base plate is separated from the vehicle body longitudinal direction in the vehicle longitudinal direction. As the vehicle body skeleton member-side end and the vehicle body skeleton member are bent in a direction in which the end opposite to the vehicle body skeleton member is displaced upward or downward in the vertical direction of the vehicle body, a predetermined amount is obtained. Giving reaction force that generates reaction force Comprising a granulation, said reactive force applying structure, the extent and the vehicle body framework member side end of the vehicle body frame member of said plurality of longitudinal ribs is maintained to be spaced apart in the longitudinal direction of the vehicle body, the vertical plurality of The position of the end of the rib on the side of the vehicle body skeleton member in the longitudinal direction of the vehicle is varied.

  In the vehicle bumper structure according to claim 1, the lower support member is disposed at the lower part of the bumper, and the lower support member abuts on the lower part of the collided body when colliding with the collided body of the vehicle, The impacted body is protected. At this time, the lower support member receives a collision load from the collision target with the vertical ribs, and transmits the load to the vehicle body skeleton member via the base plate.

  Here, if the lower support member bends at the portion between the vertical rib and the vehicle body skeleton member (the end of the vehicle body skeleton member of the vertical rib) in the base plate due to the load, a reaction force imparting structure accompanies this bending. However, a large predetermined reaction force is generated as compared with a case where the base plate is simply bent alone. In the vehicle bumper structure, the collision target is supported by the reaction force. Since the reaction force application structure generates a reaction force with the bending of the base plate described above, the reaction force applied to the collision target without adopting a complicated crushing structure as in the configuration for applying the reaction force based on the compressive load. Can be suppressed.

  Thus, in the vehicle bumper structure according to the first aspect, an appropriate reaction force is generated when the bumper collides with the collision target with a simple structure. In addition, this vehicle bumper structure supports the impacted body with an appropriate reaction force without relying on a special structure to prevent bending of the lower support member, such as by providing a vertical rib that extends to the body frame member. can do.

Further, in the vehicle bumper structure according to the second aspect of the invention, the position of the end on the vehicle body skeleton member side in at least some of the vertical ribs arranged in parallel in the vehicle width direction differs in the vehicle longitudinal direction. The front and rear positions of the strength (rigidity) change point that tends to become the base point of bending of the base plate in the lower support member are different in the vehicle width direction. Therefore, when the bumper collides with the impacted body, the reaction force is larger than the configuration in which the positions of the end portions of the vertical ribs on the vehicle body skeleton member side in the longitudinal direction of the vehicle body coincide with the bending of the base plate. Occurs.
The bumper structure for a vehicle according to a second aspect of the present invention is the bumper structure for a vehicle according to the first aspect, wherein the reaction force applying structure is configured such that end portions of the plurality of vertical ribs on the vehicle body skeleton member side are in plan view. The position in the longitudinal direction of the vehicle body is made different so as to form a wave shape.

  A bumper structure for a vehicle according to a third aspect of the present invention is the bumper structure for a vehicle according to the first or second aspect, wherein a lower portion of the bumper cover that covers the other end side of the lower support member in the longitudinal direction of the vehicle body is provided. An engaging convex portion that protrudes above the lower support member in the vertical direction of the vehicle body is provided.

In the vehicle bumper structure according to the third aspect, when the base plate bends by a predetermined amount or more at the time of collision with the collision target body, the other end side of the lower support member is engaged with the engagement convex portion and the bending is restricted. As a result, it is possible to favorably support the collision target while suppressing the reaction force accompanying the bending of the base plate before the engagement and suppressing the drop of the reaction force after the engagement.
A vehicle bumper structure according to a fourth aspect of the present invention is the vehicle bumper structure according to any one of the first to third aspects, wherein the vehicle bumper structure is provided along a vehicle width direction and connects the plurality of vertical ribs. A wall was also provided.
A vehicle bumper structure according to a fifth aspect of the present invention is the vehicle bumper structure according to the fourth aspect, wherein the wall connecting the plurality of vertical ribs is formed in a straight line along the vehicle width direction.
The bumper structure for a vehicle according to a sixth aspect of the present invention is the bumper structure for a vehicle according to any one of the first to fifth aspects, wherein the plurality of vertical ribs are provided on both sides of the base plate in the vertical direction of the vehicle. The upper vertical rib and the lower vertical rib in the vehicle vertical direction with respect to the base plate are offset in the vehicle width direction.

  As described above, the vehicular bumper structure according to the present invention has an excellent effect of generating an appropriate reaction force when the bumper collides with a collision target with a simple structure.

  A front bumper 10 to which a vehicle bumper structure according to a first embodiment of the present invention is applied will be described with reference to FIGS. 1 to 4. It should be noted that arrows FR, UP, and OUT appropriately shown in the drawings respectively indicate the front direction (traveling direction), the upper direction, and the outer side in the vehicle width direction of the vehicle to which the front bumper 10 is applied.

  FIG. 2 shows a schematic overall configuration of the front bumper 10 in a sectional view. As shown in this figure, the front bumper 10 includes a bumper reinforcement 12 as a bumper skeleton member. The bumper reinforcement 12 is a closed cross-sectional structure that is elongated in the vehicle width direction, and is supported by the vehicle body across the front ends of a pair of left and right front side members 14 that are vehicle body skeleton members.

  The bumper reinforcement 12 is covered with a bumper cover 16 from the front side of the vehicle body. The bumper cover 16 is a part that constitutes the design of the front lower part of the vehicle body, and includes a cover upper part 18 that covers the bumper reinforcement 12 from the front and a cover lower part 20 that is positioned below the cover upper part 18. An air intake opening 22 is provided between the cover upper portion 18 and the cover lower portion 20. A foam material 24 as a cushioning member is disposed between the cover upper portion 18 of the bumper cover 16 and the bumper reinforcement 12.

  The cover lower portion 20 of the bumper cover 16 is inclined so that the lower portion 20A is located rearward as it is lower, and is continuous with a lower end 20B that goes around the vehicle body. The lower end 20B of the cover lower part 20 is connected to the front end of the under cover 25 that covers the vehicle body from below.

  The front bumper 10 includes an absorber 26 as a lower support member that is elongated in the vehicle width direction (see FIG. 3). As shown in FIG. 1, the absorber 26 is fixed to a radiator support lower cross member 28, which is a vehicle body skeleton member, and its front end is positioned close to the rear of the lower part 20 </ b> A of the cover lower part 20. The front bumper 10 is configured to be able to share and support the load when the front bumper 10 collides with the collision target. The radiator support lower cross member 28 supports a cooling system component R including a radiator, an air conditioner condenser, a cooling fan, and the like from below.

  As shown in FIG. 1, the absorber 26 has a base plate 30. The base plate 30 is a base portion of the absorber 26 that extends from the front end to the rear end of the absorber 26 and covers the entire length in the vehicle width direction, and between the intermediate portion 30B and the front portion 30C that are flush with the front side of the rear portion 30A. It is formed in a stepped plate shape in which a step portion 30D is formed. The step portion 30D is configured as a vertical wall that rises upward from the front end of the intermediate portion 30B, and the front portion 30C is located above the rear portion 30A and the intermediate portion 30B.

  As shown in FIG. 3, a plurality of bolt holes 30 </ b> E are provided in the rear portion 30 </ b> A and the intermediate portion 30 </ b> B of the base plate 30 along the vehicle width direction (longitudinal direction). As shown in FIG. 1, the rear portion 30 </ b> A of the base plate 30 has a radiator support lower and a bolt 32 passing through the bolt hole 30 </ b> E and the rear flange portion 28 </ b> A of the radiator support lower cross member 28. It is fastened and fixed to the cross member 28. Further, the intermediate portion 30B of the base plate 30 has a radiator support lower cross member formed by screwing a bolt 32 penetrating the under cover 25, the bolt hole 30E, and the front flange portion 28B of the radiator support lower cross member 28 into the nut 34. Fastened to 28. Thus, the absorber 26 is cantilevered by the radiator support lower cross member 28 on the rear portion 30 </ b> A side of the base plate 30. Note that the fixing structure of at least one of the radiator support lower cross member 28 of the rear portion 30A and the intermediate portion 30B of the base plate 30 may be a locking structure using clips, for example, instead of a fastening structure using bolts 32 and nuts 34. It is.

  As shown in FIG. 3, the edge of the front portion 30 </ b> C of the base plate 30 is curved in an arc shape corresponding to the curved shape of the bumper cover 16. A front wall 36 is erected from the front edge of the front portion 30C over the entire length in the vehicle width direction. As shown in FIG. 1, the front wall 36 is inclined forward corresponding to the inclination direction of the lower portion 20A so as to be opposed to the back side of the lower portion 20A of the lower portion 20A of the bumper cover 16 at a predetermined interval. ing.

  On the other hand, from the boundary portion between the front portion 30C and the intermediate portion 30B, the rear wall 38 is erected over the entire length in the vehicle width direction so as to be continuous with the stepped portion 30D. As shown in FIG. 3, the rear wall 38 is formed in a corrugated shape in which the wave height direction is the vehicle body front-rear direction in plan view. In this embodiment, the rear wall 38 has a random wave shape with an indefinite wave height (amplitude) and a pitch (period) between tops. Further, 30D of the base plate 30 is formed in a wave shape that is continuous with the rear wall 38.

  Furthermore, as shown in FIG. 1, the absorber 26 has a plurality of vertical ribs 40 that are erected upward from the front portion 30 </ b> C of the base plate 30 in parallel with each other in the vehicle width direction. Each vertical rib 40 is elongated in the front-rear direction, and connects the front wall 36 and the rear wall 38 respectively. A rear end of each vertical rib 40 is a connection portion with the rear wall 38. Accordingly, the rear ends of the vertical ribs 40 arranged in parallel in the vehicle width direction have different positions in the front-rear direction.

  Further, as shown in FIG. 1, in this embodiment, a plurality of vertical ribs 42 are erected downward from the front portion 30C of the base plate 30 in parallel in the vehicle width direction. Each vertical rib 42 is provided at the same position as the vertical rib 40 in the vehicle width direction, and is inclined so that each front edge 42A is continuous with the front surface of the front wall 36 in a side view. On the other hand, the rear end of the vertical rib 42 is connected to the step portion 30D and coincides with the corresponding rear end position (rear wall 38) of 40. Note that the vertical ribs 42 may be provided offset from the vertical ribs 40 in the vehicle width direction.

  Due to the structure in which the rear end positions of the vertical ribs 40 and 42 arranged in parallel in the vehicle width direction are made different in the longitudinal direction of the vehicle body, the absorber 26 is located between the step portion 30D of the base plate 30 and the radiator support lower cross member 28. Bending in the direction in which the wall 36 is lifted (see arrow A) is suppressed, and this structure corresponds to the “reaction force applying structure” in the present invention.

  For example, the absorber 26 described above may be made of metal or may be formed of a resin material. In this embodiment, the absorber 26 is formed by resin molding.

  Further, as shown in FIG. 1, the front bumper 10 includes an engagement rib 44 as an engagement protrusion protruding from the back surface of the cover lower portion 20 of the bumper cover 16. The engagement rib 44 protrudes rearward continuously or intermittently along the vehicle width direction, and is provided over substantially the entire width in the vehicle width direction. The engagement rib 44 is positioned in the vicinity of the upper end of the lower portion 20A of the lower portion 20 of the cover so that a gap C is formed at a predetermined interval along the vertical direction between the upper end 36A of the front wall 36 of the absorber 26. .

  Next, the operation of the first embodiment will be described.

  In the vehicle to which the front bumper 10 having the above configuration is applied, when the front bumper 10 collides with the collision target I during traveling as shown in FIG. 4A, the foam material 24 is deformed at the upper portion to absorb the impact. The load from the cover upper portion 18 of the bumper cover 16 is transmitted to the bumper reinforcement 12. On the other hand, at the lower part of the front bumper 10, the load from the cover lower part 20 of the bumper cover 16 is supported by the absorber 26. That is, the lower part of the collision target I is supported by the absorber 26, and the lower part is prevented from entering the lower side of the vehicle body.

  The absorber in which the front wall 36 and the front edge 42A of the vertical rib 42 are inclined forward along the lower part 20A of the cover lower part 20 constituting a part of the vehicle body design when supporting the collision load on the collision target I. In this forwardly inclined shape, a part of the impact load from the collision target I is converted into an upward load, that is, a bending moment for bending the base plate 30 in the arrow A direction.

  Here, the absorber 26 has a structure in which the rear end positions (rear walls 38) of the plurality of vertical ribs 40 arranged in parallel in the vehicle width direction are different in the longitudinal direction of the vehicle body. The front and rear positions of the points are different in each part in the vehicle width direction. For this reason, when the base plate 30 bends in the direction of arrow A due to the bending moment, a larger reaction force (resistance force) acts on the bending as compared with the configuration in which the rear end positions of the vertical ribs 40 are matched. In addition, excessive bending of the base plate 30, that is, the absorber 26 is prevented. On the other hand, the absorber 26 absorbs the impact energy associated with the collision with the collision target I while suppressing the impact load (the reaction force described above) acting on the collision target I by bending the rear wall 38.

  Further, in the front bumper 10, since the engagement rib 44 is provided on the cover lower portion 20 of the bumper cover 16, when the bending of the absorber 26 exceeds a predetermined amount, the absorber 26 is moved as shown in FIG. The upper end 36A of the front wall 36 is engaged with the engagement rib 44, and the bending in the direction of the arrow A is restricted. For this reason, after the engagement between the front wall 36 and the engagement rib 44, the absorber 26 supports the collision target I by a reaction force mainly based on a compressive load along the front-rear direction.

  As described above, the front bumper 10 supports the collided body while absorbing impact energy with an appropriate reaction force based on the bending of the absorber 26 at the initial stage of the collision with the collided object I, and is engaged after the middle stage of the collision. Engaging the front wall 36 with the rib 44 supports the object to be collided with an appropriate reaction force based on the compressive load of the absorber 26 while preventing the reaction force from dropping due to excessive bending of the absorber 26. Can do.

  The above will be described in comparison with a comparative example shown in FIG. The front bumper 100 according to the comparative example includes an absorber 102 instead of the absorber 26. The absorber 102 has a front wall 106 erected from the front end of a base plate 104 formed in a flat plate shape. The front wall 106 is inclined forward along the lower part of the cover lower part 20. The absorber 102 is provided with a plurality of longitudinal ribs 108 extending in the vehicle longitudinal direction across the front wall 106 and the base plate 104 in parallel in the vehicle width direction. The rear ends 108 </ b> A of the vertical ribs 108 are aligned in the longitudinal direction of the vehicle body and are separated from the radiator support lower cross member 28. In the configuration according to this comparative example, the base plate 104 is greatly bent and deformed as shown in FIG. 4B due to the bending moment generated when the front wall 106 is inclined, and the reaction force for maintaining the collision target I is small. . In particular, since the reaction force based on the compressive load of the base plate 104 decreases as the bending increases, the reaction force that supports the collision target I is further reduced.

  On the other hand, in the front bumper 10 according to the embodiment of the present invention, the rear end position of each vertical rib 40 is made different as described above, thereby generating an appropriate reaction force accompanying the bending of the base plate 30, and the collision target in the initial stage of the collision. Both body support and energy absorption are compatible, and the engagement rib 44 prevents the reaction force from dropping after the middle stage of the collision.

  As described above, the front bumper 10 is configured not to prevent the bending of the absorber 26 but to absorb energy while generating a reaction force using the bending. Therefore, the design of the vehicle body may be sacrificed or the energy may be reduced by compression. Without adopting a complicated crushing structure for absorbing or adopting a special structure for preventing the absorber 26 from bending, an appropriate reaction force is generated at the time of collision with the collision target I with a simple structure. .

  Moreover, in the front bumper 10, since the rear end of each vertical rib 40 does not reach the radiator support lower cross member 28, the weight of the absorber 26 can be reduced.

  Next, another embodiment of the present invention will be described. Note that parts and portions that are basically the same as those in the first embodiment or the previous configuration are denoted by the same reference numerals as those in the first embodiment or the previous configuration, and description thereof is omitted.

(Second Embodiment)
FIG. 5 is a plan view showing an absorber 52 constituting a front bumper 50 according to the second embodiment of the present invention. As shown in this figure, the absorber 52 is different from the first embodiment in that it has a rear wall 54 formed in a straight line along the vehicle width direction in a plan view instead of the rear wall 38.

  In the absorber 52, the rear end 40 </ b> A of each vertical rib 40 protrudes rearward from the rear wall 54. Note that the rear ends of some of the vertical ribs 40 may coincide with the rear wall 54. Although not shown, the absorber 52 is formed in a straight line shape in which the step portion 30D of the base plate 30 coincides with the rear wall 54, and the vertical ribs 42 correspond to the vertical ribs corresponding to the rear end positions in plan view. 40 coincides with the position of the rear end 40A.

  Other configurations of the front bumper 50 are the same as the corresponding configurations of the front bumper 10. Accordingly, the front bumper 50 according to the second embodiment can obtain the same effect by the same operation as that of the first embodiment.

(Third embodiment)
FIG. 6 shows a front bumper 60 according to a third embodiment of the present invention in a side sectional view. As shown in this figure, the front bumper 60 includes an absorber 62 instead of the absorber 26, and includes a spacer member (stopper) 64 that suppresses bending of the absorber 62 in the direction of arrow A. Is different.

  The absorber 62 has a rear wall 54 instead of the rear wall 38, and is different from the absorbers 26 and 52 in that the front and rear positions at which the rear ends of the vertical ribs 40 are connected to the rear wall 54 are the same. Different. In the absorber 62, the rear end of the vertical rib 42 is connected to a step portion 30 </ b> D formed linearly along the vehicle width direction corresponding to the rear wall 54, and the corresponding rear end position of the vertical rib 40. Match.

  The spacer member 64 is inserted between the radiator support lower cross member 28 and the rear wall 54 with the rear end side fixed to the radiator support lower cross member 28. As a result, when the base plate 30 is bent in the direction of arrow A, the rear wall 54 interferes with the spacer member 64. The spacer member 64 is configured to generate a reaction force while being deformed (elastically deformed or plastically deformed) in accordance with the bending of the rear wall 54 in the arrow A direction. The structure in which the spacer member 64 is disposed between the radiator support lower cross member 28 and the rear wall 54 corresponds to the “reaction force applying structure” in the present invention.

  In this embodiment, since the spacer member 64 is disposed between the radiator support lower cross member 28 and the rear wall 54, the reaction force increases as the compression of the spacer member 64, that is, the bending of the absorber 62 increases. The joint rib 44 is not provided.

  Other configurations of the front bumper 60 are the same as the corresponding configurations of the front bumper 10.

  In the front bumper 60 according to the third embodiment, when colliding with the collision target I, the base plate 30 bends in the direction of arrow A while collapsing the spacer member 64 with 28, so that the absorber 62 is generated in the absorber 62. The spacer member 64 absorbs energy by deformation while supporting the collision target with a reaction force. When the bending of the base plate 30 increases, the reaction force generated along with the compression of the spacer member 64 increases, and the bending of the base plate 30 is limited after the middle of the collision, and the reaction force based on the compressive load of the absorber 62 and the spacer member 64. To support the collision object.

  As described above, the front bumper 60 according to the third embodiment also exhibits the same operation as that of the first embodiment, so that the effect of the first embodiment can be obtained.

  In the third embodiment, an example is shown in which a solid structure whose reaction force increases with compression is used as the spacer member 64. However, for example, the spacer member is a hollow structure that is crushed by receiving a compressive load. 64 may be configured. In this case, it is preferable to provide the engagement rib 44 in the cover lower part 20.

(Fourth embodiment)
FIG. 7 is a side sectional view showing a front bumper 70 according to a fourth embodiment of the present invention. As shown in this figure, the front bumper 70 is different from the first embodiment in that an absorber 72 is provided instead of the absorber 26.

  The absorber 72 has a rear portion 74A, an intermediate portion 74B, and a front portion 74C corresponding to the rear portion 30A, the intermediate portion 30B, and the front portion 30C of the base plate 30 in plan view, and a step portion between the front portion 74C and the intermediate portion 74B. It has the base plate 74 formed in the flat plate shape in which the step part corresponding to 30D is not formed. A front wall 76 is erected from the curved front edge of the front portion 74C of the base plate 74 over the entire width. The front wall 76 is inclined forward along the lower part 20 </ b> A of the cover lower part 20.

  Further, a rear wall 78 is erected over the entire width from the boundary portion between the intermediate portion 74B and the front portion 74C in the base plate 74. The rear wall 78 is formed in a straight line shape along the vehicle width direction in plan view. Further, a plurality of vertical ribs 80 are erected from the front portion 74C of the base plate 74 in parallel in the vehicle width direction. Each vertical rib 80 has a front end connected to the front wall 76 and a rear end connected to the rear wall 78.

  The absorber 72 has a lower rib 82 as a reaction force application structure that is erected downward from the lower surface of the base plate 74. The lower rib 82 is elongated along the longitudinal direction of the vehicle body and extends over the entire length of the base plate 74 in the longitudinal direction. A plurality of lower ribs 82 are provided in parallel in the vehicle width direction. The front edge 82A of the lower rib 82 is inclined so as to be continuous with the inclined surface of the front wall 76.

  The position and number of the lower ribs 82 in the vehicle width direction are determined independently of the position and number of the vertical ribs 80 in the vehicle width direction. That is, the height, position, and number of the lower rib 82 from the base plate 74 are determined so that a predetermined reaction force is generated when the base plate 74 is bent in the direction of arrow A. The installation height is lower than the standing height of the vertical ribs 80, the number is less than the number of the vertical ribs 80, and they are arranged at equal intervals in the vehicle width direction.

  In this embodiment, when the bending of the base plate 74 in the direction of the arrow A is increased, the amount of elongation of the lower rib 82 is increased and the reaction force is increased, so that the engagement rib 44 is not provided.

  Other configurations of the front bumper 70 are the same as the corresponding configurations of the front bumper 10.

  In the front bumper 70 according to the fourth embodiment, when it collides with the collision target I, the base plate 30 bends in the same direction while bending in the direction of arrow A (extends the lower portion of the lower rib 82), whereby the absorber 72 absorbs energy while supporting the collision target. When the bending of the base plate 74 increases, the amount of extension of the lower rib 82 increases and the reaction force increases. After the middle of the collision, the bending of the base plate 74 is limited, and the reaction force is mainly affected by the reaction force based on the compressive load of the absorber 72. Support the impactor.

  As described above, the front bumper 70 according to the fourth embodiment also exhibits the same operation as that of the first embodiment, so that the effect of the first embodiment can be obtained.

In addition, this invention is not limited to said each embodiment, It is possible to implement various changes. Therefore, for example, the rear wall 38 and the respective vertical ribs 40 may be provided on the base plate 74 to constitute an absorber. Instead of the rear walls 54 and 78 of the absorber 62 and the absorber 72, the rear wall 38 may be provided, The front-rear position of the rear end 40A located rearward of 78 may be different in each part in the vehicle width direction. Moreover, you may comprise combining each reaction force provision structure in the said embodiment 2 or more.

  In addition to the front bumper, the present invention can also be applied to, for example, a rear bumper.

  Furthermore, the present invention is not limited to the structure in which the absorbers 26, 52, 62, 72 are covered with the lower cover portion 20 of the bumper cover 16, and for example, the design of the vehicle body is made by exposing the front wall 36 of the absorber 26 or the like. You may make it comprise a surface. In this case, it is also possible to provide the engaging rib 44 at a portion other than the cover lower portion 20 of the bumper cover 16.

It is a sectional side view which shows the principal part of the front bumper which concerns on the 1st Embodiment of this invention. 1 is a side sectional view showing a schematic overall configuration of a front bumper according to a first embodiment of the present invention. It is a top view of the absorber which constitutes the front bumper concerning a 1st embodiment of the present invention. (A) is sectional side view which shows the collision state with the to-be-collised body of the front bumper which concerns on the 1st Embodiment of this invention, (B) is the collision state with the to-be-collised body of the front bumper which concerns on a comparative example. FIG. It is a top view of the absorber which comprises the front bumper which concerns on the 2nd Embodiment of this invention. It is a sectional side view which shows the principal part of the front bumper which concerns on the 3rd Embodiment of this invention. It is a sectional side view which shows the principal part of the front bumper which concerns on the 4th Embodiment of this invention.

Explanation of symbols

10 Front bumper (vehicle bumper structure, bumper)
16 Bumper cover 20 Lower part of cover (lower part of bumper cover)
26 Absorber (lower support member)
28 Radiator support lower cross member (body frame member)
30 Base plate 40 ・ 42 Vertical rib (Reaction force imparting structure)
44 Engagement rib (engagement projection)
50/60/70 Front bumper (Vehicle bumper structure, bumper)
52, 62, 72 Absorber 64 Spacer member (Reaction force applying structure)
74 Base plate 80 Vertical rib 82 Lower rib (Reaction force imparting structure)

Claims (6)

A vehicular bumper structure in which a lower support member, which is elongated in the vehicle width direction and is fixed to the vehicle body skeleton member at one end side in the vehicle longitudinal direction, is disposed below the bumper,
The lower support member has a plurality of vertical ribs, each of which is elongated in the longitudinal direction of the vehicle body from the other end side of the base plate whose one longitudinal side is fixed to the vehicle body frame member. Has been established,
The vehicle body skeleton member side ends of the plurality of vertical ribs and the vehicle body skeleton member are spaced apart from each other in the vehicle longitudinal direction,
The base plate has an end opposite to the vehicle body skeleton member side between the vehicle body skeleton member side end of the plurality of vertical ribs spaced apart in the vehicle body longitudinal direction and the vehicle body skeleton member. A reaction force application structure that generates a predetermined reaction force as it bends in a direction to be displaced upward or downward in the vertical direction of the vehicle body ,
The reaction force applying structure is configured such that the vehicle body skeleton member-side end portions of the plurality of vertical ribs and the vehicle body skeleton member are maintained to be separated from each other in the vehicle longitudinal direction. A vehicular bumper structure configured such that the position of the end on the skeleton member side in the longitudinal direction of the vehicle body is different . The reaction force applying structure includes an end portion of the vehicle body frame member side of said plurality of longitudinal ribs, claim is composed of the position in the longitudinal direction of the vehicle body are different to form a corrugated in plan view 1 The vehicle bumper structure described.   The engagement convex part which protrudes to the upper side of the vehicle body up-down direction of this lower side support member was provided in the lower part of the bumper cover which covers the other end side of the vehicle body front-back direction of the said lower side support member. Bumper structure for vehicles. The vehicle bumper structure according to any one of claims 1 to 3, further comprising a wall provided along the vehicle width direction and connecting the plurality of vertical ribs. The vehicle bumper structure according to claim 4, wherein a wall connecting the plurality of vertical ribs is formed in a linear shape along a vehicle width direction. The plurality of vertical ribs are provided on both sides of the base plate in the vehicle vertical direction,
The vehicle bumper structure according to any one of claims 1 to 5, wherein an upper vertical rib and a lower vertical rib in the vehicle vertical direction with respect to the base plate are offset in the vehicle width direction.

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