JP2018062224A - Automobile bumper reinforcement - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bumper reinforcement having high intensity and in which processing of a long hole, an opening, a recess strip part, or a flange is facilitated.SOLUTION: A bumper reinforcement comprises: a long bumper reinforcement body 11 which is formed into an almost rectangular shape in cross section so as to have a hollow part 13 in inside with a first vertical wall part 11a and a second vertical wall part 11b which have a gap therebetween and face each other, a top wall part 11c which connects upper ends of the first vertical wall part 11a and the second vertical wall part 11b integrally, and a lower wall part 11d for connecting lower ends of the first vertical wall part 11a and the second vertical wall part 11b integrally, and in which an opening part 14 is formed on the second vertical wall part 11b for dividing the vertical wall part 11b vertically, and the long bumper reinforcement body being press molded so as to extend in a vehicle width direction; and a rib plate 12 whose one end 12a is fastened to the opening part 14, the other end 12b is jointed to a facing part 15 of the opening part 14 on the first vertical wall part 11a.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a bumper reinforcement mounted in a bumper of an automobile.

  Conventionally, a bumper reinforcement is attached as an impact absorbing member in an automobile bumper. As disclosed in Patent Document 1, the bumper reinforcement includes a front plate on the impact side and a rear plate on the vehicle body side facing each other substantially in parallel with a distance from each other. The cross section mainly has a closed cross-sectional shape of “day” shape or “eye” shape. When an impact is applied to the front plate, the load is transferred from the front plate to the connection plate and then to the back plate, and the connection plate buckles as the load increases, thereby mitigating the impact applied to the vehicle body.

  Further, as disclosed in Patent Document 1, the bumper reinforcement uses an extruded member using an aluminum alloy as a material from the viewpoint of reducing the weight of the vehicle.

  Further, in Patent Document 2, a “day” -shaped closing is performed by welding a peripheral joint portion by welding or the like with a beam reinforcing plate interposed between two beam members formed into a U-shaped cross section by press molding. An invention related to a bumper beam having a cross-sectional shape is disclosed.

JP 2008-30535 A JP-A-6-171441

  When an extruded member made of an aluminum alloy is used as in Patent Document 1, a closed cross-sectional shape of “day” shape or “eye” shape can be easily realized, so a high-strength bumper Easy to manufacture reinforcements. However, bumper reinforcement requires drilling for mounting, processing such as flanges, etc., and an extruded member needs to be machined after extrusion, which increases costs.

  On the other hand, as in Patent Document 2, when manufacturing by press molding, mounting holes and flanges can be easily processed at the time of press molding, but the closed cross-section is simple with a “mouth” shape. Therefore, the strength is low, and in order to compensate for this, it is necessary to increase the thickness of the bumper reinforcement body, which causes an increase in weight and cost.

  The present invention solves the above-described conventional problems, and provides a bumper reinforcement having high strength that is easy to drill holes and processes such as flanges.

  In order to solve the above-described problem, a bumper reinforcement for an automobile according to claim 1 of the present invention includes a first vertical wall portion and a second vertical wall portion that are opposed to each other with a gap therebetween, and the first vertical wall portion. And an upper wall portion that integrally connects the upper ends of the second vertical wall portions to each other, and a lower wall portion that integrally connects the lower ends of the first vertical wall portion and the second vertical wall portion to each other. A long shape which is formed so as to have a substantially rectangular cross section and has an opening formed in the second vertical wall portion so as to divide the vertical wall portion in the vertical direction so as to extend in the vehicle width direction. A bumper reinforcement body, and a rib plate having one end fixed to the opening and the other end joined to a portion of the first vertical wall facing the opening. .

  The bumper reinforcement for an automobile according to claim 2 of the present invention includes a plurality of long holes provided at intervals in the longitudinal direction of the bumper reinforcement main body in the facing portion, and the rib plate. And a plurality of projecting pieces provided at intervals so as to correspond to the plurality of long holes, and the plurality of projecting pieces are fitted and joined to the plurality of long holes. And

  According to a third aspect of the present invention, there is provided a bumper reinforcement for an automobile, which is spaced apart in the longitudinal direction of the bumper reinforcement main body so that a plurality of beads extend in the longitudinal direction of the automobile on the plate surface of the rib plate. It is characterized by being provided.

  According to a fourth aspect of the present invention, there is provided a bumper reinforcement for an automobile having a concave portion with an inner surface bulging outward at the facing portion, and the other end of the rib plate is formed on the concave portion. It is characterized by being inserted and joined.

  The bumper reinforcement according to claim 1 of the present invention uses a press-molded bumper reinforcement main body having a substantially rectangular cross section, so that punching, flange processing, and the like can be easily performed by pressing when forming the main body. Can be done. Also, since one end of the rib plate is fixed to the opening of the main body and the other end is joined to the opposite portion of the opening, the rib plate is substantially orthogonal to the outer surface of the first vertical wall or the second vertical wall. The strength against external force such as collision force from the direction can be increased. Further, since the rib plate is inserted into the inside from the opening of the main body, positioning of the rib plate is easy.

  In the bumper reinforcement according to claim 2 of the present invention, a plurality of elongated holes are provided in the opposing portion of the main body at intervals, and a plurality of protruding pieces are provided at intervals in the other end of the rib plate. Are provided, and a plurality of protrusions of the rib plate are inserted into and joined to the plurality of elongated holes of the facing portion, so that the facing portion of the main body and the other end of the rib plate can be reliably and easily joined. Can do.

  In the bumper reinforcement according to claim 3 of the present invention, the plurality of beads are formed on the rib plate, so that the strength of the bumper reinforcement in the front-rear direction can be further increased.

  Further, in the bumper reinforcement according to claim 4 of the present invention, since the concave portion is provided in the opposing portion of the main body, and the other end of the rib plate can be fitted into the concave portion, the opposing portion in the main body is provided. The part and the other end of the rib plate can be reliably and easily joined.

  As described above, according to the present invention, it is possible to provide a bumper reinforcement having a high strength, which is easy to process such as drilling and flange.

It is a perspective view of the automobile which shows the attachment position of the bumper reinforcement concerning Embodiment 1 of the present invention. The bumper reinforcement which concerns on Embodiment 1 of this invention is shown, (A) is the sectional view on the AA line in FIG. 3, (B) is the sectional view on the XX line in (A). FIG. 2 shows an assembling method of a bumper reinforcement according to the first embodiment of the present invention, in which (A) is an exploded perspective view of the bumper reinforcement, and (B) is a perspective view of completion of assembly. The bumper reinforcement which concerns on Embodiment 2 of this invention is shown, (A) is a figure equivalent to FIG. 2 (A), (B) is a figure equivalent to FIG. 2 (B). FIG. 3 shows a bumper reinforcement according to Embodiment 3 of the present invention, in which (A) is a view corresponding to FIG. 2 (A), and (B) is a view corresponding to FIG. 2 (B).

  Next, a bumper reinforcement according to an embodiment of the present invention will be described with reference to FIGS. The bumper reinforcement according to the present embodiment is a long member made of an aluminum alloy having a substantially rectangular cross section.

(Embodiment 1)
FIG. 1 is a perspective view of an automobile showing a mounting position of a bumper reinforcement according to Embodiment 1 of the present invention. As shown in FIG. 1, a bumper reinforcement 10 is attached in the bumper 100, and a bumper face 110 is attached to the bumper reinforcement 10. FIG. 2 is a cross-sectional view showing the bumper reinforcement 10 according to the first embodiment of the present invention. 2A is a cross-sectional view taken along line AA in FIG. 3, and FIG. 2B is a cross-sectional view taken along line XX in FIG. 2A. 3A and 3B show a method for assembling the bumper reinforcement 10, wherein FIG. 3A is an exploded perspective view of the bumper reinforcement 10, and FIG. The bumper reinforcement 10 includes a bumper reinforcement main body (hereinafter referred to as “reinforce main body”) 11 and a rib plate 12.

  The reinforcement main body 11 is a long aluminum alloy member press-molded so as to extend in the vehicle width direction, and includes a first vertical wall portion 11a, a second vertical wall portion 11b, an upper wall portion 11c, and a lower wall portion. 11d. The 1st vertical wall part 11a and the 2nd vertical wall part 11b are arrange | positioned so that it may mutually oppose with a space | interval in the front-back direction of a motor vehicle (vehicle body). The upper wall portion 11c bends the upper ends of the first vertical wall portion 11a and the second vertical wall portion 11b and connects them together, while the lower wall portion 11d has the first vertical wall portion 11a and the second vertical wall portion. The lower ends of 11b are bent and connected together. Thereby, the reinforcement main body 11 is formed in a substantially rectangular cross section so as to have the hollow portion 13 therein. The hollow portion 13 is divided into an upper hollow portion 13a and a lower hollow portion 13b by the rib plate 12 in the vertical direction.

  In the front bumper, the bumper reinforcement 10 is disposed such that the first vertical wall portion 11a is on the front side of the vehicle and the second vertical wall portion 11b is on the rear side, and the front of the vehicle as indicated by the symbol P in FIG. Absorbs the impact force applied from.

  The second vertical wall 11b of the reinforcement main body 11 has an opening 14 so as to divide the second vertical wall 11b into an upper second vertical wall 2a and a lower second vertical wall 2b. Is formed. The opening 14 is continuously formed so as to extend along the longitudinal direction (vehicle width direction) of the reinforcement body 11, and the opening width (vertical width) is a width into which the rib plate 12 can be inserted. The rib plate 12 is formed slightly larger than the plate thickness.

  Here, the position facing the opening 14 of the second vertical wall portion 11 b in the first vertical wall portion 11 a of the reinforcement body 11 is defined as a facing portion 15. A plurality of long holes 16 are provided in the facing portion 15 at intervals in the longitudinal direction of the reinforcement body 11. The plurality of long holes 16 are processed when the reinforcement body 11 is press-formed. The opening width of the long hole 16 (the width in the vertical direction in FIG. 2A) is a width that allows the protrusion 12c of the rib plate 12 to be inserted, and is slightly larger than the plate thickness of the protrusion 12c (rib plate 12). ing.

  The rib plate 12 is a plate-shaped aluminum alloy long member having a uniform thickness. If the right side (rear side of the vehicle body) in FIG. 2 is one end 12a and the left side (front side of the vehicle body) is the other end 12b, the other end 12b is provided with a plurality of protruding pieces 12c spaced in the longitudinal direction. The intervals between the plurality of projecting pieces 12 c are formed so as to correspond to the intervals between the plurality of long holes 16 provided in the facing portion 15 of the first vertical wall portion 11 a of the reinforcement body 11. The width of the rib plate 12 in the left-right direction (left-right direction in FIG. 2) is set slightly longer than the width in the left-right direction of the reinforcement body 11 (left-right direction in FIG. 2), and the plurality of projecting pieces 12c are the first vertical wall portion. One end 12a protrudes outward from the second vertical wall portion 11b while protruding outward from 11a. This protrusion is for ensuring the weld 1.

  On the plate surface of the rib plate 12, a plurality of beads 17 bulging toward the upper wall 11c side of the reinforcement body 11 are provided by press molding. The bead 17 is for further increasing the strength of the bumper reinforcement 10 in the front-rear direction. The bead 17 is spaced in the longitudinal direction of the reinforce main body 11 so as to extend in the front-rear direction of the automobile (left-right direction in FIG. 2). It is provided free of charge.

  Further, the bead 17 is formed in an intermediate portion in the longitudinal direction of the protruding piece 12c (longitudinal direction of the rib plate 12) and an intermediate portion of the adjacent protruding pieces 12c and 12c. Further, the bead 17 is continuously formed from one end 12a of the rib plate 12 to the other end 12b of the rib plate 12, but is not formed on the protruding piece 12c. Then, on the opening 14 side (opening edge) of the upper second vertical wall 2a in the reinforcement main body 11, a recess 3 corresponding to the bead 17 is formed as shown in FIG. ing.

  When assembling the bumper reinforcement 10, as shown in FIG. 3A, the bead 17 of the rib plate 12 press-molded in advance, and the upper second vertical wall portion of the press-molded reinforcement main body 11 in advance. The other end 12b of the rib plate 12 is inserted into the opening 14 of the reinforcement body 11 so as to correspond to the recess 3 of 2a, and then a plurality of projecting pieces 12c are fitted into the plurality of long holes 16. Then, as shown in FIG. 3B, one end 12 a of the rib plate 12 is fixed to the opening 14 by welding 1. Further, the plurality of projecting pieces 12 c of the rib plate 12 are fixed to the plurality of elongated holes 16 of the reinforcement main body 11 by welding 1. Thereby, the assembly of the bumper reinforcement 10 is completed. In addition to the weld 1, the protruding piece 12 c and the long hole 16 may be formed, for example, by making the opening width of the long hole 16 smaller than the thickness of the protruding piece 12 c (rib plate 12) to make the protruding piece 12 c into the long hole 16. You may make it join by methods, such as press-fitting.

  Since the bumper reinforcement 10 according to the first embodiment uses the press-molded reinforcement main body 11 having a substantially rectangular cross section, when the reinforcement main body 11 is press-formed, the long holes 16 and the recesses 3 are processed. Can be easily performed. Although not shown in the first embodiment, when a flange for attachment for attaching the bumper face 110 to the reinforcement body 11 is formed in the reinforcement body 11, the flange can be formed at the time of press-molding the reinforcement body 11.

  Also, since one end 12a of the rib plate 12 is fixed to the opening 14 of the reinforcement body 11 and the other end 12b is joined to the facing portion 15 of the opening 14, the rib plate 12 causes the first vertical wall 11a or The intensity | strength with respect to external forces, such as a collision force from the substantially orthogonal direction with respect to the outer surface of the 2nd vertical wall part 11b, can be raised. Further, since the rib plate 12 is inserted into the body 11 through the opening 14, the rib plate 12 can be easily positioned.

  In addition, a plurality of elongated holes 16 are provided at intervals in the facing portion 15 of the reinforcement body 11, while a plurality of protruding pieces 12 c are provided at intervals in the other end 12 b of the rib plate 12. Since the plurality of projecting pieces 12c of the rib plate 12 are fitted into the plurality of long holes 16, the opposing portion 15 of the reinforcement main body 11 and the other end 12b of the rib plate 12 are reliably and easily connected via the projecting pieces 12c. Can be joined.

  Further, since the plurality of beads 17 are formed on the rib plate 12, the strength of the bumper reinforcement 10 in the longitudinal direction of the vehicle body can be further increased. The bead 17 of the rib plate 12 is continuously formed in the longitudinal direction of the vehicle body so as to bulge toward the upper wall portion 11c side of the reinforcement body 11, but is directed toward the lower wall portion 11d of the reinforcement body 11. It may be formed so as to bulge out or discontinuously. Of the plurality of beads 17 of the rib plate 12, the bead 17 located in the middle in the longitudinal direction of the protruding piece 12c is not formed on the protruding piece 12c, but is formed by extending the bead 17 to the protruding piece 12c. You may make it do. In this case, it is preferable to form the same shape as the recess 3 in the long hole 16.

  The rib plate 12 is formed of a single aluminum member continuous in the longitudinal direction of the reinforcement body 11, but is divided without being continuous in the longitudinal direction, and the divided rib plate is spaced apart in the longitudinal direction. You may make it arrange | position with space. In this case, from the viewpoint of increasing the strength of the bumper reinforcement 10, the opening portion 14 of the second vertical wall portion 11b where the rib plate 12 is not disposed is formed on the lower edge and the end portion of the upper second vertical wall portion 2a. It is preferable to join the second vertical wall portion 2b by welding or the like so that the end edge portions of the second vertical wall portion 2b are in contact with each other. Further, the strength of the bumper reinforcement 10 can be changed depending on the position in the longitudinal direction by changing the plate thickness of the rib plate which is divided and disposed with a gap in the longitudinal direction depending on the arrangement position.

  The reinforcement main body 11 and the rib plate 12 are not limited to aluminum alloys, and may be other materials that can be press-molded, such as iron and duralumin. Moreover, although the bumper reinforcement 10 showed the form attached to the front bumper of a motor vehicle, it may be attached to a rear bumper.

(Embodiment 2)
FIG. 4 is a cross-sectional view showing a bumper reinforcement 20 according to Embodiment 2 of the present invention. 4A is a diagram corresponding to FIG. 2A, and FIG. 4B is a diagram corresponding to FIG. The bumper reinforcement 20 includes a reinforcement main body 21 and a rib plate 22.

  The reinforcement main body 21 is a long aluminum member press-molded so as to extend in the vehicle width direction, and includes a first vertical wall portion 21a, a second vertical wall portion 21b, an upper wall portion 21c, and a lower wall portion 21d. It is composed of The 1st vertical wall part 21a and the 2nd vertical wall part 21b are arrange | positioned so that it may mutually oppose with a space | interval. The upper wall portion 21c bends the upper ends of the first vertical wall portion 21a and the second vertical wall portion 21b and connects them together, while the lower wall portion 21d is connected to the first vertical wall portion 21a and the second vertical wall portion. The lower ends of 21b are bent and connected together. Thereby, the reinforcement main body 21 is formed in a substantially rectangular cross section so as to have the hollow portion 23 inside. The hollow portion 23 is divided into an upper hollow portion 23a, an intermediate hollow portion 23b, and a lower hollow portion 23c in the vertical direction by an upper plate portion 22a and a lower plate portion 22b of the rib plate 22. .

  The second vertical wall portion 21b of the reinforcement main body 21 has an opening 24 so as to divide the second vertical wall portion 21b into an upper second vertical wall portion 2c and a lower second vertical wall portion 2d. Is formed. The opening 24 is formed so as to extend along the longitudinal direction (vehicle width direction) of the reinforcement body 21, and the width (vertical width) is the opening 14 of the reinforcement body 11 according to the first embodiment. The width of the connecting plate portion 22c, which will be described later, constituting the rib plate 22 is slightly larger than the vertical width of the connecting plate portion 22c.

  Here, a position facing the opening 24 of the second vertical wall portion 21 b in the first vertical wall portion 21 a of the reinforcement body 21 is defined as a facing portion 25. A plurality of long holes 26 a and 26 b are provided in the longitudinal direction of the reinforcement body 21 in the longitudinal direction on the upper edge side 25 a and the lower edge side 25 b of the facing portion 25, one by one in the longitudinal direction. The processing of the plurality of long holes 26 a and 26 b is performed when the reinforcement body 21 is press-formed. The width of the long hole 26 in the vertical direction is slightly larger than the plate thickness of the rib plate 22 and is set to a width in which the rib plate 22 can be inserted.

  The rib plate 22 is a long member made of an aluminum alloy having a U-shaped cross section and extending in the vehicle width direction, and includes an upper plate portion 22a, a lower plate portion 22b, and a connecting plate portion 22c. One end (the right side in FIG. 4) of the upper plate portion 22a and the lower plate portion 22b has a shape in which the upper end portion and the lower end portion of the connecting plate portion 22c standing up and down are bent by press molding and integrally connected to each other. It has become. The other end portions of the upper plate portion 22a and the lower plate portion 22b, that is, the end portion on the anti-connection plate portion 22c side (left side in FIG. 4) correspond to the plurality of long holes 26a and 26b in the reinforcement body 21. A plurality of projecting pieces 22d and 22e are provided at intervals in the longitudinal direction.

  The width of the upper plate 22a and the lower plate 22b in the longitudinal direction of the vehicle body (left and right direction in FIG. 4) is slightly longer than the width of the reinforcement body 21 in the longitudinal direction of the vehicle body. When the rib plate 22 is assembled to the reinforcement main body 21 by projecting the periphery of the connecting portion between the lower plate portion 22b and the lower plate portion 22b outward from the plate surface of the second vertical wall portion 21b. The connecting plate portion 22c side is formed so as to be securely fixed (welded) to the periphery of the opening 24 of the reinforcement main body 21 by welding 1. Similarly, the projecting pieces 22d and 22e are projected outward (front of the vehicle body) from the first vertical wall portion 21a, so that the projecting pieces 22d and 22e can be securely fixed (welded) to the peripheral edges of the long holes 26a and 26b by welding 1. I am doing so.

  When the bumper reinforcement 20 is assembled, the protrusions 22d and 22e on the other end side of the rib plate 22 are inserted into the opening 24 of the reinforcement body 21 that has been press-molded in advance, and the plurality of elongated holes 26a and 26b are inserted. A plurality of projecting pieces 22d and 22e are inserted. Then, one end of the rib plate 22 on the connection plate portion 22 c side and the periphery of the opening 24 are fixed by welding 1. Further, the plurality of projecting pieces 22 d and 22 e of the rib plate 22 are fixed to the periphery of the plurality of long holes 26 a and 26 b of the reinforcement main body 21 by welding 1. Thereby, the assembly of the bumper reinforcement 20 is completed. The protrusions 22d, 22e and the long holes 26a, 26b are not welded. For example, the vertical widths of the long holes 26a, 26b are made smaller than the plate thickness of the rib plate 22 to make the protrusions 22d, 22e. You may make it join by methods, such as press-fitting.

  Since the bumper reinforcement 20 according to the second embodiment uses the press-molded reinforcement main body 21 having a substantially rectangular cross section, the long holes 26a and 26b and the opening 24 are formed when the reinforcement main body 21 is press-formed. Such processing can be easily performed. In addition, one end (on the connecting plate portion 22c side) of the upper plate portion 22a and the lower plate portion 22b of the rib plate 22 is fixed to the peripheral edge of the opening 24 of the reinforcement body 21, that is, the second vertical wall portion 21b. Since the other end of the plate 22 (on the anti-connecting plate portion 22c side) is joined by welding to the periphery of the long holes 26a and 26b in the facing portion 25 of the opening 24, that is, the first vertical wall portion 21a of the reinforcement body 21. The rib plate 22 can increase the strength against an external force such as a collision force from a direction substantially orthogonal to the outer surface of the first vertical wall portion 21a or the second vertical wall portion 21b. Further, since the rib plate 22 is inserted into the interior of the reinforcement body 21 through the opening 24, the rib plate 22 can be easily positioned.

  In addition, a plurality of long holes 26a, 26b are provided in two rows in the longitudinal direction at intervals on the upper edge side 25a and the lower edge side 25b of the facing portion 25 of the reinforcement body 21, while the upper plate portion 22a and lower portion of the rib plate 22 are provided. A plurality of projecting pieces 22d, 22e are provided in two rows at intervals on the other end of the side plate portion 22b (on the side opposite to the connecting plate portion 22c), and the rib plate 22 is provided in the plurality of long holes 26a, 26b in the facing portion 25. Since the plurality of projecting pieces 22d and 22e are fitted and joined, the facing portion 25 of the reinforcement body 21, that is, the first vertical wall portion 21a and the other end of the rib plate 22 are connected via the projecting pieces 22d and 22e. And can be reliably and easily joined.

  In addition, since the rib plate 22 is a long member formed by pressing a single plate-like member into a U-shaped cross section, it is easy to assemble the rib plate 22 to the reinforcement body 21. The strength of the bumper reinforcement 20 in the longitudinal direction of the vehicle body can be further increased.

  In addition, you may form the bead similar to Embodiment 1 in the board surface of the upper side plate part 22a of the rib plate 22, and the lower side plate 22b. Further, the rib plate 22 may be divided in the longitudinal direction and arranged with a space in the same direction. In this case, the opening 24 of the second vertical wall portion 21b in which the rib plate 22 is not disposed has an end edge portion of the upper second vertical wall portion 2c and an end edge portion of the lower second vertical wall portion 2d. It is preferable to join by welding or the like so as to contact each other. Moreover, the intensity | strength of the bumper reinforcement 20 can also be changed with the position of a longitudinal direction by changing the plate | board thickness of the rib plate divided | segmented and arrange | positioned at intervals in the longitudinal direction with the arrangement | positioning positions.

  The reinforcement main body 21 and the rib plate 22 are not limited to aluminum alloys, and may be other materials that can be press-molded, such as iron and duralumin. The bumper reinforcement 20 may be attached to either a front bumper or a rear bumper of an automobile.

(Embodiment 3)
FIG. 5 is a sectional view showing a bumper reinforcement 30 according to the third embodiment of the present invention. 5A is a view corresponding to FIG. 2A, and FIG. 5B is a view corresponding to FIG. The bumper reinforcement 30 includes a reinforcement main body 31 and a rib plate 32.

  The reinforcement main body 31 is a long aluminum alloy member press-molded so as to extend in the vehicle width direction, and includes a first vertical wall portion 31a, a second vertical wall portion 31b, an upper wall portion 31c, and a lower wall portion. 31d. The 1st vertical wall part 31a and the 2nd vertical wall part 31b are arrange | positioned so that it may mutually oppose with a space | interval. And the upper wall part 31c bends the upper ends of the 1st vertical wall part 31a and the 2nd vertical wall part 31b, mutually connects, and the lower wall part 31d is the 1st vertical wall part 31a and the 2nd vertical wall part 31b. The lower ends of the two are bent and connected together. Thereby, the reinforcement main body 31 is formed in a substantially rectangular cross section so as to have the hollow portion 33 inside. The hollow portion 33 is divided into an upper hollow portion 33a and a lower hollow portion 33b by a rib plate 32 in the vertical direction.

  An opening 34 is formed in the second vertical wall portion 31b of the reinforcement main body 31 so as to divide the second vertical wall portion 31b vertically. The opening 34 is formed so as to extend along the longitudinal direction (vehicle width direction) of the reinforcement body 31, and the vertical width thereof is larger than the thickness of the rib plate 32 so that the rib plate 32 can be inserted. Is also set slightly larger.

  Here, a position facing the opening 34 of the second vertical wall portion 31 b in the first vertical wall portion 31 a of the reinforcement body 31 is defined as a facing portion 35. The opposing portion 35 is provided with a concave portion 36 whose inner surface bulges outward in the longitudinal direction of the reinforcement body 31. The recess 36 is processed when the reinforcement body 31 is press-molded. The vertical width of the concave portion 36 is set slightly smaller than the plate thickness of the rib plate 32, and the other end (left side in FIG. 5) 32 b of the rib plate 32 is press-fitted into the concave portion 36.

  The rib plate 32 is a plate-like long member made of aluminum alloy, and unlike the rib plate 12 according to the first embodiment, the other end 32b is not provided with a protruding piece. The width of the rib plate 32 in the left-right direction (left-right direction in FIG. 5) is slightly longer than the width in the left-right direction of the reinforcement body 31 (left-right direction in FIG. 5).

  When assembling the bumper reinforcement 30, the other end 32 b of the rib plate 32 is inserted from the opening 34 of the reinforcement main body 31, and the other end 32 b is press-fitted into the recess 36 of the reinforcement main body 31. Join. Then, one end (right side in FIG. 5) 32 a of the rib plate 32 is fixed to the opening 34 by welding 1. Thereby, the assembly of the bumper reinforcement 30 is completed.

  The bumper reinforcement 30 according to the third embodiment uses the press-molded reinforcement main body 31 having a substantially rectangular cross section. Therefore, when the reinforcement main body 31 is press-molded, the concave stripe portion 36, the opening 34, and the like. Can be easily performed. In addition, one end 32 a of the rib plate 32 is fixed to the opening 34 of the main body 31, and the other end 32 b is press-fitted into the concave portion 36 provided in the facing portion 35 of the opening 34. The intensity | strength with respect to external forces, such as a collision force from the substantially orthogonal direction with respect to the outer surface of the 1st vertical wall part 31a or the 2nd vertical wall part 31b, can be raised. Further, since the rib plate 32 is inserted into the interior of the reinforcement body 31 through the opening 34, the rib plate 32 can be easily positioned.

  Further, since the concave portion 36 is provided in the facing portion 35 of the reinforcement main body 31, and the other end 32b of the rib plate 32 can be press-fitted into the concave portion 36, the opposing portion 35 and the rib plate in the reinforcement main body 31 can be pressed. The other end 32b of 32 can be reliably and easily joined.

  A bead similar to that of the first embodiment may be formed on the plate surface of the rib plate 32. Further, the rib plate 32 may be divided in the longitudinal direction and arranged with an interval in the same direction. In this case, the opening 34 of the second vertical wall portion 31b where the rib plate 32 is not disposed is joined by welding or the like so that the upper edge portion and the lower edge portion are in contact with each other. Is preferred. Further, the strength of the bumper reinforcement 30 can be changed depending on the position in the longitudinal direction by changing the thickness of the rib plate that is divided and disposed with a gap in the longitudinal direction depending on the position of the rib plate.

  Further, the reinforcement main body 31 and the rib plate 32 are not limited to aluminum alloys, but may be other materials that can be press-molded such as iron and duralumin. The bumper reinforcement 30 may be attached to either a front bumper or a rear bumper of an automobile.

  As described above, the bumper reinforcement according to the first to third embodiments can easily process a long hole, an opening, a concave portion, and the like at the time of press molding of the reinforcement main body, and can be manufactured at low cost. Since the rib plate is disposed in the hollow portion of the reinforcement main body, the strength becomes high.

1 Welding 10, 20, 30 Bumper reinforcement 11, 21, 31 Bumper reinforcement body (Rainforce body)
11a, 21a, 31a First vertical wall portion 11b, 21b, 31b Second vertical wall portion 11c, 21c, 31c Upper wall portion 11d, 21d, 31d Lower wall portion 12, 22, 32 Rib plates 12a, 32a One end 12b, 32b Other end 12c, 22d, 22e Protruding piece 13, 23, 33 Hollow portion 14, 24, 34 Opening portion 15, 25, 35 Opposing portion 16, 26a, 26b Long hole 17 Bead 36 Concave portion

Claims (4)

  A first vertical wall portion and a second vertical wall portion facing each other with an interval; an upper wall portion integrally connecting the upper ends of the first vertical wall portion and the second vertical wall portion; and the first A lower wall portion integrally connecting the lower ends of the vertical wall portion and the second vertical wall portion to each other is formed in a substantially rectangular cross section so as to have a hollow portion therein, and the vertical wall portion is formed on the second vertical wall portion. And an elongated bumper reinforcement body press-molded so as to extend in the vehicle width direction and one end is fixed to the opening, and the other end is the first A bumper reinforcement for an automobile, comprising a rib plate joined to a portion of the vertical wall facing the opening.   A plurality of long holes provided in the opposing portion at intervals in the longitudinal direction of the bumper reinforcement main body, and at the other end of the rib plate are provided at intervals so as to correspond to the plurality of long holes. The bumper reinforcement for an automobile according to claim 1, further comprising: a plurality of projecting pieces, wherein the plurality of projecting pieces are inserted into and joined to the plurality of elongated holes.   The plurality of beads are provided on the plate surface of the rib plate at intervals in the longitudinal direction of the bumper reinforcement body so as to extend in the longitudinal direction of the automobile. Automotive bumper reinforcement.   4. The concave portion of which the inner surface bulges outward toward the outer side in the facing portion, and the other end of the rib plate is fitted and joined to the concave portion. The bumper reinforcement for automobiles according to any one of the above.

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