JP2018144769A - Bumper beam structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bumper beam structure for suppressing deformation of a bumper beam.SOLUTION: A bumper beam main body 2 comprises an outside panel 5 and an inside panel 6 arranged at an inside of the outside panel 5 in a nesting shape. In the bumper beam main body 2, at a section between both right and left end parts 2a connected to side members, a predetermined reinforcement region R is provided. The outside panel 5 comprises a pair of outer lateral surface parts 5a arranged in a vertically separated manner from each other, an outer longitudinal surface part 5b connecting front end parts of the pair of outer lateral surface parts 5a and an outer flange part 5c arranged in a standing manner at an outside in a vertical direction from a rear end part of the outer lateral surface parts 5a in the reinforcement region R. The inside panel 6 comprises a pair of inner lateral surface parts individually jointed with the pair of outer lateral surface parts 5a, an inner longitudinal surface part arranged with a gap from the outer longitudinal surface part 5b and an inner flange part which is arranged in a standing manner in the reinforcement region R and jointed with the outer flange part 5c.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a structure of a bumper beam that supports a front bumper or a rear bumper of a vehicle.

  The vehicle is provided with a bumper beam that supports a front bumper and a rear bumper. Generally, the bumper beam extends in the left-right direction (vehicle width direction), and the left and right end portions are connected to the left and right side members, respectively. The bumper beam is required to have rigidity and strength that can withstand a collision load input during a vehicle collision and a traction load input during towing.

  Conventionally, various bumper beams configured by combining two panels have been proposed. That is, by forming a closed cross section with two panels, rigidity and strength are enhanced. For example, a bumper beam formed by combining a hat-shaped cross-section panel and a flat panel is known. It has also been proposed to configure a bumper beam by combining two hat-shaped cross-section panels in a nested manner (see, for example, Patent Document 1). In such a bumper beam using a hat-shaped cross-section panel, a flange portion is erected over the entire region in the left-right direction.

Japanese Patent No. 2771837

  However, in the bumper beam in which the flange portion is erected as described above, for example, when a collision load or a traction load is applied, stress tends to concentrate particularly at the flange portions at the left and right end portions. For this reason, there is a problem that it is difficult to suppress the deformation of the left and right ends of the bumper beam.

  On the other hand, for example, if the bumper beam is configured by nesting two U-shaped cross-section panels and the flange portion as described above is omitted, stress concentration at the left and right end portions of the bumper beam can be alleviated. However, in such a bumper beam in which the flange portion is omitted, local opening (deformation that widens the opening of the U-shaped cross section) tends to occur locally in the region between the left and right end portions.

  The bumper beam structure of the present case has been developed in view of the above-described problems, and an object thereof is to suppress the deformation of the bumper beam. The present invention is not limited to this purpose, and is a function and effect derived from each configuration shown in the embodiment for carrying out the invention described later, and has another function and effect that cannot be obtained by conventional techniques. is there.

  (1) The bumper beam structure disclosed herein extends in the left-right direction at the front end or rear end of the vehicle body, and both left and right ends are connected to left and right side members, respectively, and a predetermined amount is provided between the left and right ends. A bumper beam body provided with a reinforcing region. The bumper beam main body includes at least one of a pair of outer lateral surface portions that are spaced apart from each other, an outer vertical surface portion that connects ends of the pair of outer lateral surface portions in the front-rear direction, and the reinforcing region. And an outer flange portion erected outward in the vertical direction from an end portion in the front-rear direction inner side of the outer lateral surface portion. The bumper beam main body is provided in a nested manner inside the outer panel, and a pair of inner lateral surface portions respectively joined to the pair of outer lateral surface portions, and end portions in the front-rear direction outer side of the pair of inner lateral surface portions. While being connected to each other, the inner vertical surface portion disposed with a gap from the outer vertical surface portion, and the reinforcing region is erected outward in the vertical direction from the front end in the front-rear direction of at least one of the inner lateral surface portions. And an inner flange portion joined to the outer flange portion.

(2) It is preferable that the said outer side flange part is standingly arranged by the up-down direction outer side from the edge part inside the front-back direction in each of a pair of said outer side surface part in the said reinforcement area | region. Moreover, it is preferable that the said inner side flange part is standingly arranged by the reinforcement area | region from the edge part inside the front-back direction in each of a pair of said inner side surface part at the up-down direction outer side.
(3) It is preferable that the reinforcing region is provided adjacent to at least one of the left and right end portions of the bumper beam body.

  (4) It is preferable that the bumper beam structure includes at least one bracket for fixing the bumper to the bumper beam main body. In this case, it is preferable that the bracket has a fixing portion that is fixed to the bumper beam main body, and that both the left and right end portions of the fixing portion and the left and right end portions of the reinforcing region are positioned so as to be shifted in the left-right direction. . The bumper is a member disposed at the front end or the rear end of the vehicle, and is also referred to as a “bumper cover” or a “bumper fascia”.

(5) It is preferable that either one of the left and right ends of the reinforcing region is located between the left and right ends of the fixed portion.
(6) It is preferable that at least one of the outer vertical surface portion and the inner vertical surface portion has irregularities.

(7) It is preferable that the plate | board thickness of the said outer side panel is smaller than the plate | board thickness of the said inner side panel.
(8) It is preferable that the bumper beam structure includes an attachment member that is provided on at least one of the left and right ends of the bumper beam main body and on which a pulling member for pulling the vehicle body is mounted.

  According to the disclosed bumper beam structure, since the outer flange portion and the inner flange portion are erected in a predetermined reinforcing region provided between the left and right end portions of the bumper beam main body, the occurrence of mouth opening in the reinforcing region is suppressed. In addition, the stress concentration at the left and right ends can be reduced. Therefore, deformation of the bumper beam body can be suppressed.

It is a perspective view of the vehicle body front part to which the bumper beam structure concerning an embodiment was applied. It is a front view (front view) of the bumper beam structure of FIG. FIGS. 3A and 3B are cross-sectional views of the bumper beam main body of FIG. 2, in which FIG. 2A shows a cross section outside the reinforcing region (a cross section taken along the line AA of the bumper beam main body of FIG. 2); The BB cross section of the bumper beam main body is shown. FIG. 3 is a diagram (an enlarged view of a main part in FIG. 2) for explaining a positional relationship in a left-right direction between a fixing portion of a bracket in FIG. 2 and a reinforcing region. It is a figure for demonstrating the positional relationship of the fixing part of a bracket which concerns on one modification, and the reinforcement area of the left-right direction. It is a figure for demonstrating the positional relationship of the fixing | fixed part of the bracket which concerns on another modification, and the reinforcement area | region of the left-right direction.

  A bumper beam structure as an embodiment will be described with reference to the drawings. Note that the embodiment described below is merely an example, and there is no intention to exclude various modifications and technical applications that are not explicitly described in the following embodiment. In the following description, the front-rear direction and the left-right direction are determined based on a vehicle to which the bumper beam structure is applied. The side toward the center of the vehicle is referred to as the inside, and the opposite side is referred to as the outside. Furthermore, the direction of gravity is defined as the upward direction, and the opposite direction is defined as the downward direction.

[1. Constitution]
A bumper beam structure 1 according to this embodiment is applied to a vehicle body 10 shown in FIG. The vehicle body 10 is a structure that forms a skeleton of a vehicle, and includes a pair of left and right side members 11, 11 extending in the front-rear direction, and a pair of left and right support members coupled to the front end portions of the side members 11, 11. 12 and 12, and an upper bar 13 and a cross member 14 installed between the support members 12 and 12.

  The left and right side members 11, 11 are arranged with a space therebetween. The left and right support members 12, 12 are also arranged with a space therebetween. Each support member 12 extends in the vertical direction, and has an upper end portion coupled to the upper bar 13 and a lower end portion coupled to the cross member 14.

  The bumper beam structure 1 includes a bumper beam main body 2 extending in the left-right direction at the front end portion of the vehicle body 10, a bracket 3 for fixing the bumper beam main body 2 to a front bumper of the vehicle, and a pulling member 20 for pulling the vehicle body 10. And a mounting member 4 to be mounted. The front bumper referred to here is a member provided at the front end of the vehicle, and is also called a bumper cover or a bumper fascia. The towing member 20 is, for example, an eyebolt (towing hook). When pulling the vehicle body 10 with another vehicle, or when fixing the vehicle body 10 to the floor surface during transportation by a ship or a loaded vehicle, A wire or the like can be attached.

  The bumper beam main body 2 of the present embodiment is a member for receiving an impact at the time of a frontal collision, and is disposed behind the front bumper. In the present embodiment, since the bumper beam main body 2 is provided at the front end of the vehicle body 10, the front and rear direction outer side of the bumper beam main body 2 is the front side, and the front and rear direction inner side is the rear side.

  The bumper beam body 2 of the present embodiment has a symmetrical shape. Hole portions 2h and 2h for arranging the attachment member 4 are provided in the left and right end portions 2a and 2a of the bumper beam main body 2 in the front-rear direction. The left and right end portions 2a, 2a of the bumper beam main body 2 are connected to the left and right side members 11, 11 via the crash can 15 and the support member 12 described above, respectively. The crash can 15 is a box-shaped member that absorbs an impact at the time of a frontal collision, extends in the front-rear direction, has a front end portion coupled to the bumper beam body 2 via a reinforcing plate (not shown), and a rear end portion. Is coupled to the support member 12 via the mounting plate 16.

  As shown in FIG. 2, a predetermined reinforcing region R is provided between the left and right ends 2a, 2a of the bumper beam main body 2. The reinforcement region R is a region in the bumper beam body 2 where stress is likely to concentrate during towing or collision, and is determined in advance based on, for example, simulation or experiment. The bumper beam body 2 of the present embodiment is provided with two reinforcing regions R and R. Specifically, the reinforcing regions R and R are provided adjacent to the left and right end portions 2a and 2a of the bumper beam main body 2, respectively.

  As shown in FIGS. 3A and 3B, the bumper beam main body 2 includes two panels 5 and 6 joined to each other. Each of the panels 5 and 6 is formed by bending a steel plate having a uniform thickness, for example, and extends in the left-right direction. The panels 5 and 6 of the present embodiment have different cross-sectional shapes between the outside of the reinforcing region R and the inside of the reinforcing region R.

  Specifically, the cross-sectional shape of each of the panels 5 and 6 is a substantially U-shape opened rearward outside the reinforcing region R, and a hat-shaped opened rearward in the reinforcing region R. is there. In addition, a cross section here is a cross section which follows a front-back direction and an up-down direction. One panel 6 is nested inside the other panel 5. Hereinafter, among these panels 5 and 6, the outer panel 5 is also referred to as "outer panel 5", and the inner panel 6 is also referred to as "inner panel 6".

  The outer panel 5 includes a pair of outer lateral surface portions 5a and 5a that are spaced apart from each other vertically, and an outer vertical surface portion 5b that connects the front end portions of the outer lateral surface portions 5a and 5a. Each outer lateral surface portion 5a is provided along the left-right direction and the front-rear direction. Moreover, the outer side vertical surface part 5b is provided along the left-right direction and the up-down direction.

  The outer vertical surface portion 5b of the present embodiment has irregularities. Specifically, the outer vertical surface 5b has a recess 5d that is recessed rearward. As shown in FIG. 2, the concave portion 5 d of the outer vertical surface portion 5 b is provided over the entire area of the outer panel 5 in the left-right direction. A plurality of lightweight holes 5h are formed in the concave portion 5d of the outer vertical surface portion 5b.

  The outer panel 5 includes outer flange portions 5c and 5c that are erected in the reinforcing region R from the rear end portion of each of the pair of outer lateral surface portions 5a in the vertical direction. These outer flange portions 5c are provided only in the reinforcing region R in the bumper beam body 2, and are not provided outside the reinforcing region R.

  The outer flange portions 5c and 5c of the present embodiment have a substantially trapezoidal shape when viewed from the front. However, the left and right end portions of the outer flange portion 5c are smoothly connected to the outer lateral surface portion 5a so that no corner is formed between the outer flange portion 5c and the outer lateral surface portion 5a. That is, the outer flange portion 5c is formed so as to expand toward the outer lateral surface portion 5a.

  As shown in FIGS. 3A and 3B, the inner panel 6 has an inner side surface portion 6a and an inner side configured in the same manner as the outer side surface portion 5a, the outer vertical surface portion 5b, and the outer flange portion 5c of the outer panel 5, respectively. It has a vertical surface portion 6b and an inner flange portion 6c. As shown in FIG. 3A, in the present embodiment, the plate thickness t1 of the outer panel 5 is made smaller than the plate thickness t2 of the inner panel 6 (t1 <t2). Further, the inner lateral surface portion 6a is formed so that the dimension in the front-rear direction is about half of the dimension in the front-rear direction of the outer lateral surface portion 5a.

  A pair of inner side surface parts 6a and 6a are joined to a pair of outer side surface parts 5a and 5a, respectively, by welding, for example. The inner vertical surface portion 6b connects the front end portions of the pair of inner horizontal surface portions 6a and 6a, and is provided with a gap between the outer vertical surface portion 5b. Therefore, in the bumper beam main body 2, a substantially rectangular closed cross section is formed by the four surface portions of the pair of outer lateral surface portions 5a, 5a, the outer vertical surface portion 5b, and the inner vertical surface portion 6b.

  The inner vertical surface portion 6b has a concave portion 6d similar to the concave portion 5d of the outer vertical surface portion 5b. In other words, in the present embodiment, both the outer vertical surface portion 5b and the inner vertical surface portion 6b have irregularities. The inner flange portion 6c is erected vertically outward from the rear end portion of each of the pair of inner lateral surface portions 6a, similarly to the outer flange portion 5c. These inner flange portions 6c and 6c are joined to the outer flange portions 5c and 5c, for example, by welding.

  As shown in FIG. 2, the bracket 3 is disposed in front of the bumper beam main body 2. In the present embodiment, the two brackets 3 and 3 are provided at positions symmetrical to each other with respect to the center of the bumper beam main body 2 in the left-right direction. In the present embodiment, the case where the left and right brackets 3 and 3 are symmetrical to each other is illustrated.

  The bracket 3 is formed by bending a steel plate, for example, and has a fixing portion 3 a fixed to the bumper beam main body 2. The fixing portion 3a of the present embodiment is formed in a substantially rectangular shape at one end portion of the bracket 3, and is fastened and fixed to the outer vertical surface portion 5a of the outer panel 5. Further, the other end portion 3b of the bracket 3 is fixed to the rear surface portion of the front bumper.

  As shown in FIG. 4, the bracket 3 is provided such that the left and right ends of the fixing portion 3 a are positioned so as to be shifted in the left and right directions from the left and right ends of the reinforcing region R. That is, the four positions P1 to P4 of the left and right end positions P1 and P2 of the bracket 3 fixed portion 3a and the left and right end positions P3 and P4 of the reinforcing region R are not overlapped in the left and right direction. The positional relationship between the bracket 3 and the reinforcing region R is set.

  In the present embodiment, the end portion on the inner side in the left-right direction of the reinforcing region R is positioned between the left and right end portions of the fixing portion 3 a of the bracket 3. Specifically, the bracket 3 is provided so that the position P3 of the end portion on the inner side in the left-right direction in the reinforcing region R is substantially in the middle of the positions P1, P2 of the left and right end portions of the fixing portion 3a of the bracket 3. .

  In addition, since the reinforcement area | region R is an area | region in which the outer side flange part 5c and the inner side flange part 6c are provided, the positions P3 and P4 of the right and left both ends of the reinforcement area | region R are the right and left of the outer side flange part 5c and the inner side flange part 6c. It is the same as the position of both ends. 4 shows an enlarged view of the left side of the bumper beam structure 1, but the positional relationship between the bracket 3 and the reinforcing region R on the right side of the bumper beam structure 1 is the same as that on the left side of the bumper beam structure 1 (FIG. 4). And left-right symmetry).

  The attachment member 4 is formed in a cylindrical shape and has a female screw portion 4a to which the pulling member 20 can be screwed. The attachment member 4 is disposed in each of the holes 2 h and 2 h of the bumper beam main body 2 and is fixed to the crash can 15. As described above, the attachment member 4 is provided at the left and right end portions 2a of the bumper beam main body 2, and thus is located outside the reinforcing region R. The attachment members 4 and 4 of this embodiment are located in front of the left and right side members 11 and 11, respectively. In other words, the attachment member 4 is provided at a position overlapping the side member 11 in the front view of the bumper beam structure 1.

[2. Action, effect]
(1) In the bumper beam main body 2 described above, the outer flange portion 5c and the inner flange portion 6c are erected in a predetermined reinforcing region R provided between the left and right end portions 2a, 2a. For this reason, in the reinforcement area | region R of the bumper beam main body 2, when a load acts on the bumper beam main body 2, for example with a traction or a collision, it can make it difficult to generate a mouth opening. Moreover, even if a mouth opening occurs, the amount of deformation can be reduced.

  Further, since the outer flange portion 5c and the inner flange portion 6c are not provided at the left and right end portions 2a and 2a of the bumper beam body 2, stress concentration at the left and right end portions 2a and 2a can be reduced. Therefore, according to the bumper beam structure 1 described above, deformation of the bumper beam main body 2 can be suppressed.

  (2) In the outer panel 5 described above, the outer flange portion 5c is erected in the reinforcing region R from the rear end portion of each of the pair of outer lateral surface portions 5a outward in the vertical direction. Similarly, in the inner panel 6 described above, the inner flange portion 6c is erected in the reinforcing region R from the rear end portion of each of the pair of inner lateral surface portions 6a in the vertical direction outer side. As described above, by providing the outer flange portion 5c and the inner flange portion 6c on the upper and lower sides of the bumper beam main body 2, it is possible to make the mouth opening in the reinforcing region R less likely to occur. Moreover, even if a mouth opening occurs, the amount of deformation can be further suppressed.

  (3) The portion adjacent to the left and right end portions 2a, 2a of the bumper beam body 2 is more likely to open than the other portions. However, in the bumper beam structure 1 described above, the reinforcing region R is provided in this portion. The occurrence of opening of the bumper beam main body 2 can be more appropriately suppressed.

  (4) In the bumper beam main body 2, stress tends to concentrate on the left and right end portions of the fixing portion 3 a of the bracket 3 and the left and right end portions of the reinforcing region R, and if these portions overlap, it tends to be a bending point. On the other hand, in the bumper beam structure 1 described above, the left and right end portions of the fixing portion 3a of the bracket 3 and the left and right end portions of the reinforcing region R are both shifted in the left-right direction, so that the stress applied to the bumper beam body 2 is dispersed. Can be made. Thereby, since a bending point can be made hard to produce in the bumper beam main body 2, a deformation | transformation of the bumper beam main body 2 can be suppressed more effectively.

  (5) Particularly, in the bumper beam structure 1 described above, since the end portion on the inner side in the left-right direction of the reinforcing region R is located between the left and right end portions of the fixing portion 3a of the bracket 3, the stress applied to the bumper beam body 2 is more appropriately applied. It is possible to disperse, and it is possible to further prevent bending points. Therefore, deformation of the bumper beam main body 2 can be more effectively suppressed.

  (6) The outer panel 5 described above has increased rigidity because the outer vertical surface 5b has irregularities. Thereby, since the rigidity of the bumper beam main body 2 is improved, the deformation of the bumper beam main body 2 can be further suppressed. Similarly, the inner panel 6 described above has increased rigidity because the inner vertical surface 6b has irregularities. This also increases the rigidity of the bumper beam body 2, so that the deformation of the bumper beam body 2 can be further suppressed.

  (7) Since the plate thickness t1 of the outer panel 5 is smaller than the plate thickness t2 of the inner panel 6, the outer panel 5 can be more easily deformed than the inner panel 6. Therefore, for example, the impact force applied to the collision partner during a collision can be reduced, which can contribute to the protection of the collision partner.

  (8) In the case where the flange portion is erected over the entire region in the left-right direction as in the conventional bumper beam, when the traction load is applied to at least one of the left and right ends of the bumper beam, There is a possibility that stress concentrates in the flange portion and the bumper beam is deformed. Further, in the bumper beam in which the flange portion is omitted, when a traction load acts on at least one of the left and right end portions, there is a possibility that a mouth opening may occur in the region between the left and right end portions.

  On the other hand, according to the bumper beam structure 1 described above, even if a traction load acts on at least one of the left and right end portions 2a of the bumper beam body 2 by pulling the vehicle body 10 via the traction member 20, as described above. The deformation of the bumper beam main body 2 can be suppressed. That is, it is possible to make it difficult for mouth opening in the reinforcing region R of the bumper beam body 2 to occur during towing, and to relieve stress concentration at the left and right ends 2a and 2a.

[3. Modified example]
Regardless of the embodiment described above, various modifications can be made without departing from the spirit of the invention. Each structure of this embodiment can be selected as needed, or may be combined appropriately.

  The positional relationship between the bracket 3 and the reinforcing region R is not limited to that described above. For example, as shown in FIG. 5, the bracket 3 may be provided so that the left and right end portions of the fixing portion 3a are positioned between the left and right end portions of the reinforcing region R in the left-right direction. That is, the positional relationship between the bracket 3 and the reinforcing region R so that the positions P1 and P2 of the left and right ends of the fixing portion 3a of the bracket 3 are between the positions P3 and P4 of the left and right ends of the reinforcing region R. May be set.

  Or as shown in FIG. 6, the bracket 3 may be provided so that the right and left both ends of the fixing | fixed part 3a may be located in the exterior of the reinforcement area | region R in the left-right direction. That is, the positional relationship between the bracket 3 and the reinforcing region R so that the positions P1 and P2 of the left and right end portions of the fixing portion 3a of the bracket 3 are out of the positions between the left and right end portions P3 and P4 of the reinforcing region R. May be set.

  In both cases illustrated in FIGS. 5 and 6, both the left and right end portions of the fixing portion 3 a of the bracket 3 and the left and right end portions of the reinforcing region R are positioned so as to be shifted in the left and right directions. Similarly, the stress applied to the bumper beam body 2 can be dispersed. Thereby, since a bending point can be made hard to produce in the bumper beam main body 2, a deformation | transformation of the bumper beam main body 2 can be suppressed more effectively.

  In the above-described embodiment, the case where the outer flange portion 5c is erected vertically outward from each of the pair of outer lateral surface portions 5a has been described. However, the outer flange portion 5c is vertically movable from one of the pair of outer lateral surface portions 5a. It may be erected outward. In this case, the inner flange portion 6c may be erected outward in the vertical direction from one of the pair of inner lateral surface portions 6a and joined to the outer flange portion 5c.

  Thus, even when the outer flange portion 5c and the inner flange portion 6c are provided on only one of the upper and lower sides of the bumper beam main body 2, as described above, it is difficult for mouth opening to occur in the reinforcing region R of the bumper beam main body 2. can do. Moreover, even if a mouth opening occurs, the amount of deformation can be reduced. Therefore, deformation of the bumper beam main body 2 can be suppressed.

  The position and number of the reinforcing regions R described above are examples. At least one reinforcing region R may be provided in the region between the left and right end portions 2a, 2a connected to the side members 11, 11 in the bumper beam main body 2. For example, one reinforcing region R may be provided in the central portion in the left-right direction of the bumper beam body 2. Alternatively, three or more reinforcing regions R may be provided between the left and right end portions 2a, 2a of the bumper beam main body 2 with an interval in the left-right direction.

  In the embodiment described above, the case where the outer vertical surface portion 5b has irregularities is illustrated, but the outer vertical surface portion 5b may be formed in a flat shape. In this case, the shape of the outer panel 5 can be simplified and the moldability can be improved. The same applies to the inner panel 6, and the formability can be improved by forming the inner vertical surface portion 6b in a planar shape.

  In the above-described embodiment, the case where the mounting member 4 is provided at the left and right end portions 2a and 2a of the bumper beam main body 2 is illustrated, but either one or both of the left and right mounting members 4 may be omitted. Further, either one of the left and right brackets 3 and 3 may be omitted, or the bracket 3 may be arranged so that the positional relationship between the bracket 3 and the reinforcing region R is other than the positional relationship described above. Even when the mounting member 4 and the bracket 3 are omitted or when the position of the bracket 3 is changed, the bumper beam structure 1 can suppress the deformation of the bumper beam main body 2 as described above.

  In the above-described embodiment, the bumper beam structure 1 applied to the front bumper of the vehicle has been described. However, the bumper beam structure can also be applied to the rear bumper of the vehicle. That is, this bumper beam structure may be provided with a bumper beam main body extending in the left-right direction at the rear end of the vehicle body. In this case, the inner side in the front-rear direction of the bumper beam body is the front side, and the outer side in the front-rear direction is the rear side.

DESCRIPTION OF SYMBOLS 1 Bumper beam structure 2 Bumper beam main body 2a End part 3 Bracket 3a Fixing part 4 Mounting member 5 Outer panel 5a Outer side surface part 5b Outer side surface part 5c Outer flange part 6 Inner panel 6a Inner side surface part 6b Inner side surface part 6c Inner flange part 10 Car body 11 Side member 20 Traction member R Reinforcement area

Claims (8)

A bumper beam body that extends in the left-right direction at the front end portion or the rear end portion of the vehicle body, has both left and right end portions connected to left and right side members, and has a predetermined reinforcing region between the left and right end portions, respectively. ,
The bumper beam body is
A pair of outer lateral surface portions that are spaced apart from each other vertically, an outer longitudinal surface portion that connects the outer ends in the front-rear direction of the pair of outer lateral surface portions, and at least one of the outer lateral surface portions in the reinforcing region. An outer panel provided with an outer flange portion erected from the inner end in the front-rear direction to the outer side in the vertical direction;
A pair of inner side surfaces provided in a nested manner inside the outer panel and joined to the pair of outer side surfaces, respectively, and the outer ends in the front-rear direction of the pair of inner side surfaces are connected to each other. An inner vertical surface portion that is disposed with a gap from the vertical surface portion, and an up-and-down outer side that is erected from an end on the inner side in the front-rear direction of at least one of the inner lateral surface portions in the reinforcing region and is joined to the outer flange portion A bumper beam structure, comprising: an inner panel having an inner flange portion. The outer flange portion is erected from the end in the front-rear direction inner side of each of the pair of outer lateral surface portions in the reinforcing region to the outer side in the vertical direction,
2. The bumper beam structure according to claim 1, wherein the inner flange portion is erected in the vertical direction outward from an inner end portion in the front-rear direction of each of the pair of inner lateral surface portions in the reinforcing region. The bumper beam structure according to claim 1, wherein the reinforcing region is provided adjacent to at least one of the left and right end portions of the bumper beam main body. Comprising at least one bracket for fixing the bumper to the bumper beam body;
The bracket has a fixing portion fixed to the bumper beam body;
The bumper beam structure according to any one of claims 1 to 3, wherein both the left and right end portions of the fixing portion and the left and right end portions of the reinforcing region are shifted in the left-right direction. 5. The bumper beam structure according to claim 4, wherein either one of left and right ends of the reinforcing region is positioned between the left and right ends of the fixed portion. The bumper beam structure according to any one of claims 1 to 5, wherein at least one of the outer vertical surface portion and the inner vertical surface portion has irregularities. The bumper beam structure according to any one of claims 1 to 6, wherein a plate thickness of the outer panel is smaller than a plate thickness of the inner panel. 8. The apparatus according to claim 1, further comprising an attachment member provided at at least one of the left and right end portions of the bumper beam main body, to which a pulling member for pulling the vehicle body is mounted. The bumper beam structure described in 1.

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