JP4685818B2 - Bumper reinforcement support structure - Google Patents

Description

  The present invention relates to a bumper reinforcement support structure, and more particularly to a bumper reinforcement support structure applied to an automobile or the like.

Conventionally, bumper reinforcement support structures applied to automobiles and the like are known (see, for example, Patent Document 1). In this technology, the front side member is formed of FRP made of FRP connected to the energy absorbing portion and joined to the vehicle body part, with a cylindrical cross section that sequentially collapses from the input end side due to an input load in the axial direction. The energy absorbing portion is equally oriented with the reinforcing fibers in the longitudinal direction of the front side member and the direction perpendicular thereto, and the supporting portion is oriented with reinforcing fibers in an isotropic manner.
JP 2005-271875 A

  However, in the technique of Patent Document 1, an L-shaped flange is fixed to the front end of the FRP energy absorbing portion by bonding or the like, and a bumper reinforcement is fixed to the L-shaped flange using a bolt or the like. For this reason, the crash stroke along the axial direction of an energy absorption part becomes short with the adhesion site | part of the L-shaped flange extended along the axial direction of an energy absorption part. As a result, in order to lengthen the crash stroke of the energy absorbing member, it is necessary to lengthen the entire length of the energy absorbing portion.

  In view of the above facts, an object of the present invention is to provide a bumper reinforcement support structure capable of extending the crash stroke of the energy absorbing member.

The bumper reinforcement support structure of the present invention according to claim 1 is composed of a bumper reinforcement arranged in the longitudinal direction along the vehicle width direction and a fiber reinforced resin material, and arranged in the longitudinal direction of the vehicle body in the longitudinal direction. A plurality of main wall portions, a main body portion integrally formed from the longitudinal ends of these main wall portions in the vehicle width direction, and attached to the bumper reinforcement, and a fiber reinforced An energy absorbing member that is made of a resin material and that includes a front mounting wall portion and a rear mounting wall portion to which the bumper reinforcement is attached while sandwiching the mounting wall portion of the main body portion from the vehicle longitudinal direction. It is characterized by that.

The energy absorbing member is made of a fiber reinforced resin material, and a plurality of main wall portions whose longitudinal direction is arranged along the longitudinal direction of the vehicle body, and integral molding from the longitudinal direction ends of these main wall portions toward the vehicle width direction A mounting wall portion, a main body portion having a front mounting wall portion and a rear mounting wall portion that are made of a fiber reinforced resin material and sandwich the mounting wall portion of the main body portion from the vehicle longitudinal direction . A bumper reinforcement having a longitudinal direction arranged along the vehicle width direction is attached to an attachment wall portion of the main body portion, a front attachment wall portion that sandwiches the attachment wall portion from the vehicle longitudinal direction, and a rear attachment wall portion . For this reason, the energy absorbing member does not have a bumper reinforcement attachment portion that overlaps in the longitudinal direction of the main wall portion. As a result, when the energy absorbing member breaks due to an impact load applied from the longitudinal end toward the longitudinal direction, the energy absorbing member is not disturbed by the bumper reinforcement mounting portion, and the energy absorbing member The crash stroke is longer.

  According to a second aspect of the present invention, in the bumper reinforcement support structure according to the first aspect, an attachment portion for attaching the bumper reinforcement to the attachment wall portion of the energy absorbing member is provided.

  The bumper reinforcement is easily attached to the energy absorbing member by the attaching portion provided on the attaching wall portion of the energy absorbing member.

  According to a third aspect of the present invention, in the bumper reinforcement support structure according to any one of the first and second aspects, a fragile portion is provided at a boundary between the main wall portion and the mounting wall portion in the energy absorbing member. It is provided.

  When the energy absorbing member breaks due to an impact load applied in the longitudinal direction from the longitudinal end, the mounting wall portion of the energy absorbing member is provided at the boundary between the main wall portion and the mounting wall portion of the energy absorbing member. The fragile portion starts from the main wall portion, and then the main wall portion sequentially breaks along the longitudinal direction. For this reason, the breaking load and the breaking mode of the energy absorbing member are stabilized.

  According to a fourth aspect of the present invention, in the bumper reinforcement support structure according to any one of the first to third aspects, a cross-sectional shape of the main wall portion of the energy absorbing member as viewed from the vehicle front-rear direction is an upper end vertical direction. It has a concavo-convex shape with a wall portion and a lower end vertical wall portion, and a weak portion is provided at the boundary between the upper end vertical wall portion and the mounting wall portion or at the boundary between the lower end vertical wall portion and the mounting wall portion. It is characterized by that.

  When the energy absorbing member breaks due to an impact load applied in the longitudinal direction from the longitudinal end, the mounting wall portion of the energy absorbing member has a cross-sectional shape viewed from the vehicle front-rear direction so that the upper end vertical wall portion and the lower end vertical portion Main wall part starting from a weak part provided at the boundary between the upper end vertical wall part and the mounting wall part of the main wall part having an irregular shape with a wall part or the boundary between the lower end vertical wall part and the mounting wall part It is easier to leave.

The present invention according to claim 5 is the bumper reinforcement support structure according to any one of claims 3 and 4, wherein the weakened portion is not sandwiched between the front mounting wall portion and the rear mounting wall portion. It is characterized by being.

Since the fragile portion is a portion that is not sandwiched between the front mounting wall portion and the rear mounting wall portion, the fragile portion can be easily configured.

  The present invention according to claim 1 can lengthen the crash stroke of the energy absorbing member.

  According to the second aspect of the present invention, the bumper reinforcement can be easily attached to the energy absorbing member.

  In the third aspect of the present invention, the breaking load and the breaking mode of the energy absorbing member are stabilized.

  In the fourth aspect of the present invention, the mounting wall portion of the energy absorbing member can be more easily detached from the main wall portion.

  In the present invention described in claim 5, the fragile portion can be easily configured.

  1st Embodiment of the bumper reinforcement support structure in this invention is described according to FIGS.

  In the figure, the arrow UP indicates the vehicle upward direction, the arrow FR in the figure indicates the vehicle forward direction, and the arrow IN in the figure indicates the vehicle width inside direction.

  FIG. 1 is a perspective view of a bumper reinforcement support structure according to an embodiment of the present invention as seen from an obliquely rearward inner side of a vehicle.

  As shown in FIG. 1, in the automobile body of the present embodiment, crash boxes 10 as energy absorbing members are disposed along the longitudinal direction of the vehicle at the lower portions of both ends in the vehicle width direction of the engine room as the front part of the vehicle body. ing. The crash box 10 is provided at the front end of each of the pair of left and right front side members. FIG. 1 shows the crash box 10 on the right side of the vehicle.

  The crash box 10 is made of CFRP (carbon fiber reinforced resin) as a fiber reinforced resin, and a cross-sectional shape viewed from the vehicle front-rear direction is an uneven shape including an upper end vertical wall portion 10A and a lower end vertical wall portion 10B. Yes.

  More specifically, the main body portion 12 of the crash box 10 includes a plurality of main wall portions 12C, 12D, 12E, 12F, 12G, 12H, and 12J whose longitudinal direction is arranged along the vehicle body longitudinal direction. These main wall portions form two U-shaped cross sections that are vertically connected with the opening portions facing inward in the vehicle width direction. An upper end vertical wall portion 12A is formed from the vehicle width direction inner end of the upper end main wall portion 12C toward the vehicle upper side, and a lower end of the lower end main wall portion 12J from the vehicle width direction inner end toward the vehicle lower end. A vertical wall portion 12B is formed.

  The main wall portions 12C, 12E, 12G, and 12J are continuously widened in the vehicle width direction from the vehicle front toward the vehicle rear.

  2 is a perspective view of the crash box 10 before impregnation with the resin material as seen from the obliquely forward outer side of the vehicle, and FIG. 3 is an exploded perspective view of the crash box 10 before the impregnation of the resin material as seen from the obliquely forward outer side of the vehicle. Shown in the figure.

  As shown in FIGS. 2 and 3, a front mounting wall portion 14 and a rear mounting wall portion 16 are provided at the front end portion of the main body portion 12 of the crash box 10.

  As shown in FIG. 3, from the front end, which is the longitudinal end of the upper end vertical wall portion 12A, the lower end vertical wall portion 12B, and the main wall portions 12D, 12F, and 12H, of the main body portion 12 of the crash box 10 to the inside in the vehicle width direction. The mounting wall portions 12K, 12L, 12M, 12N, and 12P are integrally formed.

  The front mounting wall portion 14 includes a mounting wall portion 14A that substantially overlaps all front surfaces of the mounting wall portions 12K, 12L, 12M, 12N, and 12P in the main body portion 12 of the crash box 10, and a vehicle rear side from the peripheral portion of the mounting wall portion 14A. And flanges 14B, 14C, 14D, 14E, 14F, and 14G, which overlap with the front end portions of the main wall portions 12C, 12D, 12E, 12G, 12H, and 12J.

  The rear mounting wall portion 16 includes a mounting wall portion 16A that substantially overlaps all rear surfaces of the mounting wall portions 12K, 12L, 12M, 12N, and 12P in the main body portion 12 of the crash box 10, and a peripheral portion of the mounting wall portion 16A. Flange 16B, 16C, 16D, 16E, 16F, 16G which is formed toward the rear of the vehicle and overlaps the front end of main wall portions 12C, 12D, 12E, 12G, 12H, 12J is provided.

  4 is an enlarged cross-sectional view taken along the line 4-4 in FIG. 2, and FIG. 5 is an enlarged cross-sectional view taken along the line 5-5 in FIG.

  As shown in FIG. 4, the main wall portion 12C of the main body portion 12 is sandwiched between the flange 14B of the front mounting wall portion 14 and the flange 16B of the rear mounting wall portion 16, and the main wall portion 12D of the main body portion 12 is The flange 14C of the front mounting wall 14 and the flange 16C of the rear mounting wall 16 are sandwiched. Further, the main wall portion 12E of the main body portion 12 is sandwiched between the flange 14D of the front mounting wall portion 14 and the flange 16D of the rear mounting wall portion 16, and the main wall portion 12G of the main body portion 12 is the front mounting wall portion. 14 flanges 14E and the flange 16E of the rear mounting wall 16 are sandwiched. The main wall portion 12H of the main body portion 12 is sandwiched between the flange 14F of the front mounting wall portion 14 and the flange 16F of the rear mounting wall portion 16, and the main wall portion 12J of the main body portion 12 is the front mounting wall portion. 14 flanges 14G and the flange 16G of the rear mounting wall 16 are sandwiched.

  That is, the upper end vertical wall portion 12A and the lower end vertical wall portion 12B of the main body portion 12 form the upper end vertical wall portion 10A and the lower end vertical wall portion 10B of the crash box 10. The flanges 14B, 14C, 14D, 14E, 14F, and 14G of the front mounting wall portion 14 and the flanges 16B, 16C, 16D, 16E, 16F, and 16G of the rear mounting wall portion 16 are the main wall portion 12C of the main body portion 12, 12D, 12E, 12G, 12H, and 12J form the main wall portions 10C, 10D, 10E, 10G, 10H, and 10J of the crash box 10, and the main wall portion 12F of the main body portion 12 is the main wall portion 12F of the crash box 10. A wall portion 10F is formed.

  As shown in FIG. 5, the mounting wall 12 </ b> N of the main body 12 is sandwiched between the mounting wall 14 </ b> A of the front mounting wall 14 and the mounting wall 16 </ b> A of the rear mounting wall 16. Although not shown, the mounting wall portions 12K, 12L, 12M, and 12P of the main body 12 are also sandwiched between the mounting wall portion 14A of the front mounting wall portion 14 and the mounting wall portion 16A of the rear mounting wall portion 16. .

  Accordingly, the mounting wall portion 14A of the front mounting wall portion 14 and the mounting wall portion 16A of the rear mounting wall portion 16 are the mounting wall portions 12K, 12L, 12M, 12N, and 12P of the main body portion 12, and are the mounting walls of the crash box 10. Part 10K is formed. For this reason, the mounting wall portion 10K of the crash box 10 is integrally formed from the front end of the main wall portions 10C, 10D, 10E, 10F, 10G, 10H, and 10J toward the inner side in the vehicle width direction.

  In addition, the vehicle width of the main wall portions 10C, 10D, 10E, 10F, 10G, 10H, and 10J when viewed from the vehicle front-rear direction is provided at the front end portion (the vehicle width direction inner end portion) of the mounting wall portion 10K of the crash box 10. A protruding portion 10Y that protrudes inward in the direction is formed.

  Further, the outer peripheral end 14H of the mounting wall portion 14A of the front mounting wall portion 14 is located at a predetermined distance L1 on the inner side in the vehicle width direction with respect to the vehicle width direction inner side surface 12Q of the main wall portion 12F in the main body portion 12 of the crash box 10. The outer peripheral end 16H of the mounting wall portion 16A of the rear mounting wall portion 16 is predetermined on the inner side in the vehicle width direction with respect to the inner surface 12Q in the vehicle width direction of the main wall portion 12F in the main body portion 12 of the crash box 10. It is arranged at the position of the distance L2. For this reason, the root portion of the mounting wall portion 12N is a weakened portion 18 that is not reinforced by the mounting wall portion 14A of the front mounting wall portion 14 and the mounting wall portion 16A of the rear mounting wall portion 16.

  Therefore, when the crash box 10 is broken by an impact load applied from the front end toward the rear of the vehicle, the mounting wall portion 10K of the crash box 10 is weakened at the boundary between the main wall portion 10F and the mounting wall portion 10K. The part 18 is easily separated from the main wall part 10F.

  As shown in FIG. 2, the root portion of the mounting wall portion 12K and the root portion of the mounting wall portion 12L in the main body portion 12 of the crash box 10 are also fragile portions 18 like the root portion of the mounting wall portion 12N.

  Therefore, when the crash box 10 breaks due to an impact load applied from the front end toward the rear of the vehicle, the mounting wall portion 10K of the crash box 10 has the mounting wall portion 10K and the upper end vertical wall portion 10A or the lower end vertical wall portion 10B. Starting from the weakened portion 18 provided at the boundary, the upper end vertical wall portion 10A or the lower end vertical wall portion 10B is easily detached.

  FIG. 6A shows a developed shape of the main body 12 before impregnation of the resin material (woven fabric state) when the crash box 10 is manufactured. FIG. 6B shows a developed shape of the front mounting wall 14 before the resin material is impregnated (woven fabric state) when the crash box 10 is manufactured, and FIG. 6C shows the crash box. 10 shows the unfolded shape of the rear mounting wall portion 16 before the resin material is impregnated (woven fabric state) when 10 is manufactured.

  As shown in FIG. 6A, in the developed shape of the main body portion 12 before impregnation with the resin material (woven fabric state), cuts 20, 22, 24, and 26 are formed along the longitudinal direction at the front end portion, When the main body portion 12 is inserted into the mold, wrinkles are less likely to occur by bending along the alternate long and short dash line. In addition, when the mold is inserted into the mold, there are no gaps due to the cuts 20, 22, 24, 26, but there may be gaps.

  As shown in FIG. 6 (B), in the unfolded state of the front mounting wall 14 before being impregnated with the resin material (woven fabric state), a cut 28, between the mounting wall 14A and the flanges 14B, 14D, 14E, 14G, 30, 32, and 34 are formed, and when the front mounting wall portion 14 is inserted into the mold, it is difficult to cause wrinkles by bending along the alternate long and short dash line. Note that when the mold is inserted into the mold, there are no gaps due to the cuts 28, 30, 32, 34, but there may be gaps.

  As shown in FIG. 6C, in the expanded state of the rear mounting wall 16 before impregnation with the resin material (woven fabric state), a cut 38, between the mounting wall 16A and the flanges 16B, 16D, 16E, 16G, 40, 42, and 44 are formed, and when the front mounting wall portion 16 is inserted into a mold, it is difficult to cause wrinkles by bending along the alternate long and short dash line. It should be noted that when the mold is inserted into the mold, there is no gap due to the cuts 38, 40, 42, 44, but there may be a gap.

  In addition, after the main body portion 12, the front mounting wall portion 14, and the rear mounting wall portion 16 before being impregnated with the resin material (in the woven state) are placed in the molding die, the main body portion 12, the front mounting wall portion 14 in the molding die, The rear mounting wall 16 is impregnated with a resin material, for example, a thermosetting resin (matrix resin), to form a CFRP crash box 10.

  Therefore, the mounting wall portion 10K having a predetermined strength can be easily obtained by adopting a laminated structure in which the front mounting wall portion 14 and the rear mounting wall portion 16 as separate wall members are attached to the front end portion of the main body portion 12 of the crash box 10. The fragile portion 18 can be easily formed.

  In addition, although illustration was abbreviate | omitted, the preliminary shaping which shape | molds in the main-body part 12, the front attachment wall part 14, and the back attachment wall part 16 of a woven fabric state using the shaping prepared separately was performed, and it was preshaped The crash box 10 may be formed by RTM molding in which each woven fabric is laminated, placed in a mold, impregnated with resin, and heat-cured in a sealed state. In this case, even if the shape of the crash box 10 is complicated, the woven fabric of reinforcing fibers is shaped by pre-shaping, so that the manufacture becomes easier.

  As shown in FIG. 1, a bumper reinforcement 50 is disposed along the vehicle width direction in the lower part of the front end of the engine room, which is the front part of the vehicle body. The bumper reinforcement 50 has both end portions 50 </ b> A in the vehicle width direction attached to the attachment wall portion 10 </ b> K of the crash box 10.

  7 is a cross-sectional view taken along the line 7-7 in FIG. 1, and FIG. 8 is an enlarged cross-sectional view taken along the line 8-8 in FIG.

  As shown in FIG. 7, the rear surface of the rear wall portion 50 </ b> B of the bumper reinforcement 50 is attached to the attachment wall portion 10 </ b> K of the crash box 10.

  As shown in FIG. 8, the bumper reinforcement 50 is made of a metal extruded material having a cross-sectional shape viewed from the vehicle width direction, and a plurality of front wall portions 50 </ b> C of the bumper reinforcement 50 are provided on the front wall portion 50 </ b> C. The working hole 54 is formed. Further, the bolts 56 inserted from these working holes 54 pass through the rear wall portion 50B of the bumper reinforcement 50 and the mounting wall portion 10K of the crash box 10, and are provided on the mounting wall portion 10K of the crash box 10. The nut 58 is fastened.

  Therefore, the bumper reinforcement 50 is fixed to the mounting wall 10 </ b> K of the crash box 10 by the bolt 56 and the nut 58.

  As shown in FIG. 2, a through hole 60 is formed in the mounting wall portion 10 </ b> K of the crash box 10 as a mounting portion for inserting a bolt 56 and a nut 58. The through hole 60 is also formed in the protruding portion 10Y of the mounting wall portion 10K.

  Next, the operation of this embodiment will be described.

  The crash box 10 of the present embodiment is made of fiber reinforced resin, and has an upper end vertical wall portion 10A, a lower end vertical wall portion 10B, and a plurality of main wall portions 10C, 10D arranged in the longitudinal direction along the longitudinal direction of the vehicle body. 10E, 10F, 10G, 10H, and 10J, and a mounting wall portion 10K that is integrally molded from the front end toward the vehicle width inner side. The longitudinal direction of the mounting wall portion 10K is along the vehicle width direction. The arranged bumper reinforcement 50 is attached by bolts 56 and nuts 58.

  For this reason, the bumper reinforcement attachment part (for attaching the bumper reinforcement 50 to the longitudinal direction (vehicle front-back direction) of the main wall parts 10C, 10D, 10E, 10F, 10G, 10H, and 10J is attached to the crash box 10. There is no mounting part).

  As a result, when the crash box 10 made of fiber reinforced resin is broken by the impact load applied from the front end toward the rear of the vehicle, the crash box 10 is not disturbed by the bumper reinforcement mounting portion. For this reason, the crash stroke along the axial direction of the crash box 10 becomes long.

  Further, in the present embodiment, when the crash box 10 is broken by an impact load applied from the front end toward the rear of the vehicle, the mounting wall portion 10K of the crash box 10 becomes the main wall portion 10F and the mounting wall portion at the initial stage of the collision. The fragile portion 18 provided at the boundary with 10K is easily separated from the main wall portion 10F as a starting point, and then the main wall portions 10C, 10D, 10E, 10F, 10G, 10H, and 10J of the crash box 10 are on the vehicle front side. From the vehicle to the rear of the vehicle. For this reason, the breaking load and the breaking mode of the crash box 10 are stabilized.

  In the present embodiment, the mounting wall 10K of the crash box 10 is further easily detached from the weakened portion 18 provided at the boundary between the upper end vertical wall 10A or the lower end vertical wall 10B and the mounting wall 10K. To do.

  In the present embodiment, the front mounting wall 14 and the rear mounting wall 16 as separate wall members are attached to the front end of the main body 12 of the crash box 10, so that the torsional rigidity in the direction around the front and rear axes of the crash box 10. In addition, it is possible to improve the strength against fatigue and the fatigue strength acting from an oblique direction.

  Moreover, in this embodiment, it has predetermined intensity | strength by setting it as the laminated structure which attaches the front attachment wall part 14 and the rear attachment wall part 16 as another wall member to the front-end part of the main-body part 12 of the crash box 10. FIG. Since the mounting wall 10K can be easily formed, productivity can be improved.

  In the present embodiment, the bumper reinforcement 50 can be easily attached to the crash box 10 by the through hole 60 provided in the attachment wall portion 10 </ b> K of the crash box 10.

  Moreover, in this embodiment, the weak part 18 can be easily comprised by the difference in the number of layers of the fiber (woven fabric) in the crash box 10.

  Next, a second embodiment of the bumper reinforcement support structure in the present invention will be described with reference to FIG.

  In addition, the same member as 1st Embodiment attaches | subjects the same code | symbol, and abbreviate | omits the description.

  FIG. 9 shows an exploded perspective view of the crash box 10 according to the present embodiment as seen from the obliquely forward outer side of the vehicle.

  As shown in FIG. 9, in this embodiment, the front mounting wall portion 14 has a flat plate structure with only the mounting wall portion 14A, and the rear mounting wall portion 16 has a flat plate structure with only the mounting wall portion 16A. For this reason, compared with the configuration of the first embodiment, when the crash box 10 is broken by an impact load applied from the front end toward the rear of the vehicle, the mounting wall portion 10K of the crash box 10 is further easily from the main wall portion. Leave. Moreover, the workability | operativity at the time of putting the front attachment wall part 14 and the back attachment wall part 16 in a shaping | molding die improves compared with 1st Embodiment.

  Next, a third embodiment of the bumper reinforcement support structure in the present invention will be described with reference to FIG.

  In addition, the same member as 1st Embodiment attaches | subjects the same code | symbol, and abbreviate | omits the description.

  FIG. 10 is an exploded perspective view of the crash box 10 according to the present embodiment as viewed from the obliquely forward outer side of the vehicle.

  As shown in FIG. 10, in this embodiment, the cross-sectional shape of the crash box 70 as the energy absorbing member viewed from the vehicle front-rear direction is a U-shape with the opening facing inward in the vehicle width direction. A plurality of main wall portions 70A, 70B, and 70C arranged along the direction are provided. In addition, attachment wall portions 70D, 70E, and 70F are formed from the front ends of the main wall portions 70A, 70B, and 70C toward the inside of the U-shaped cross section, respectively. Each mounting wall part 70D, 70E, 70F is laminated | stacked mutually, and the through-hole 60 for inserting the volt | bolt and nut which attach the bumper reinforcement 50 is formed.

  Therefore, also in this embodiment, the crash box 70 has a bumper reinforcement attachment portion (attachment portion for attaching the bumper reinforcement) that overlaps in the longitudinal direction (vehicle longitudinal direction) of the main wall portions 70A, 70B, and 70C. not exist.

  As a result, when the crash box 70 made of fiber reinforced resin is broken by the impact load applied from the front end toward the rear of the vehicle, the crash box 70 is not disturbed by the bumper reinforcement mounting portion, and the crash The crash stroke along the axial direction of the box 70 becomes longer.

  In the above, the present invention has been described in detail for specific embodiments. However, the present invention is not limited to the above-described embodiments, and various other embodiments are possible within the scope of the present invention. It will be apparent to those skilled in the art. For example, in each of the above embodiments, the crush box 10 is made of CFRP (carbon fiber reinforced resin), but the fiber reinforced resin is not limited to CFRP, and may be other fiber reinforced resin such as glass fiber reinforced resin.

  Moreover, the cross-sectional shape seen from the longitudinal direction of the crash boxes 10 and 70 is not limited to the cross-sectional shape of each said embodiment, Other shapes may be sufficient.

  Further, the cross-sectional shape and material of the bumper reinforcement 50 viewed from the vehicle width direction are not limited to the above embodiments.

  Moreover, in each said embodiment, although the through-hole 60 as an attachment part was formed in the attachment wall part 10K of the crash box 10, an attachment part is not limited to the through-hole 60, A convex part, a recessed part, an engaging part, a volt | bolt You may comprise by other attachment parts, such as.

  Moreover, in each said embodiment, although the attachment wall part 10K of the crash box 10 was integrally molded toward the vehicle width direction inner side from the front end of main wall part 10C, 10D, 10E, 10G, 10H, 10J, it replaces with this. The mounting wall portion 10K of the crash box 10 may be integrally formed from the front end of the main wall portions 10C, 10D, 10E, 10G, 10H, and 10J toward the outside in the vehicle width direction.

  In each of the above embodiments, the bumper reinforcement support structure of the present invention is applied to the front side member. However, the bumper reinforcement support structure of the present invention is applied to other parts such as the rear side member in addition to the front side member. Is possible.

It is the perspective view seen from the vehicle slanting back inner side which shows the bumper reinforcement support structure which concerns on 1st Embodiment of this invention. It is the perspective view seen from the vehicle diagonal front side which shows the crash box of the bumper reinforcement support structure which concerns on 1st Embodiment of this invention. It is the disassembled perspective view seen from the vehicle diagonal front outer side which shows the crash box of the bumper reinforcement support structure which concerns on 1st Embodiment of this invention. FIG. 4 is an enlarged cross-sectional view taken along a line 4-4 in FIG. 2. FIG. 5 is an enlarged cross-sectional view taken along a line 5-5 in FIG. 2. (A) is a developed shape showing the main body when manufacturing the bump box of the bumper reinforcement support structure according to the first embodiment of the present invention, and FIG. 6 (B) is a front mounting wall portion when manufacturing the crash box. FIG. 6C is a developed shape showing the rear mounting wall portion when the crash box is manufactured. FIG. 7 is an enlarged cross-sectional view taken along a line 7-7 in FIG. 1. FIG. 8 is an enlarged cross-sectional view taken along a line 8-8 in FIG. 7. It is the perspective view seen from the vehicle diagonal front side which shows the crash box of the bumper reinforcement support structure which concerns on 2nd Embodiment of this invention. It is the disassembled perspective view seen from the vehicle diagonal front outer side which shows the crash box of the bumper reinforcement support structure which concerns on 3rd Embodiment of this invention.

Explanation of symbols

10 Crash box (energy absorbing member)
10A Vertical wall portion of upper end of crash box 10B Vertical wall portion of lower end of crash box 10C Main wall portion of crash box 10D Main wall portion of crash box 10E Main wall portion of crash box 10F Main wall portion of crash box 10G Main wall of crash box 10H Crash box main wall 10J Crash box main wall 10K Crash box mounting wall 12 Crash box main body 14 Crash box front mounting wall 16 Crash box rear mounting wall 18 Vulnerable part 50 Bumper reinforcement 56 Bolt 58 Nut 60 Through hole (Mounting part)
70 Crash box (energy absorbing member)
70A Main wall part of crash box 70B Main wall part of crash box 70C Main wall part of crash box 70D Installation wall part of crash box 70E Installation wall part of crash box 70F Installation wall part of crash box

Claims (5)

A bumper reinforcement arranged in the longitudinal direction along the vehicle width direction;
A plurality of main wall portions made of a fiber reinforced resin material and arranged in the longitudinal direction of the vehicle body in the longitudinal direction, and integrally formed from the longitudinal ends of these main wall portions toward the vehicle width direction, the bumper reinforcement A front mounting wall having a mounting wall portion to which a mentament is mounted and a fiber-reinforced resin material, the mounting wall portion of the main body portion being sandwiched from the front-rear direction of the vehicle body, and the bumper reinforcement being mounted An energy absorbing member comprising a portion and a rear mounting wall portion ;
The bumper reinforcement support structure characterized by having.   The bumper reinforcement support structure according to claim 1, wherein a mounting portion for mounting the bumper reinforcement is provided on the mounting wall portion of the energy absorbing member.   The bumper reinforcement support structure according to any one of claims 1 and 2, wherein a weak portion is provided at a boundary between the main wall portion and the mounting wall portion in the energy absorbing member.   The main wall portion of the energy absorbing member has a concavo-convex shape in which a cross-sectional shape viewed from the vehicle front-rear direction includes an upper end vertical wall portion and a lower end vertical wall portion, and the upper end vertical wall portion and the mounting wall portion The bumper reinforcement support structure according to any one of claims 1 to 3, wherein a fragile portion is provided at a boundary or a boundary between the lower end vertical wall portion and the mounting wall portion. 5. The bumper reinforcement support structure according to claim 3, wherein the fragile portion is a portion that is not sandwiched between the front mounting wall portion and the rear mounting wall portion .

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