JP2021154973A - Underrun protector support structure - Google Patents

Abstract

To suitably suppress the deformation and damage of a side member by a reinforcing member.SOLUTION: An underrun protector extending in a vehicle width direction at one side of a vehicle in a fore-and-aft direction is fixed to a bracket lower part of an underrun protector bracket 10, and a bracket upper part 11 has a bracket first region 11A arranged at the other side in a vehicle fore-and-aft direction, and a bracket second region 11B arranged at one side in the vehicle fore-and-aft direction. The bracket first region 11A and the bracket second region 11B are fastened and fixed to a side member vertical plate part 6 from a vehicle width direction by at least one fastening member 36 and at least one second fastening member 37. A reinforcing vertical plate part 21 has a reinforcing first region 21A for sandwiching the side member vertical plate part 6 between the bracket first region 11A and the reinforcing first region. The bracket first region 11A, the side member vertical plate part 6 and the reinforcing first region 21A are co-fastened and fixed to one another by a first fastening member 36.SELECTED DRAWING: Figure 2

Description

The present disclosure relates to an underramp protector support structure that supports an underramp protector extending in the vehicle width direction at a lower front end or a lower rear end of a vehicle toward the vehicle body.

Patent Document 1 describes in the vehicle width direction of the front ends of the left and right side members extending in the front-rear direction on both sides of the vehicle width direction and on the rear side of both ends of the first cross member extending in the vehicle width direction at the front end of the vehicle. Inside, the structure for arranging the left and right gussets is described. The gusset consists of a gusset vertical plate portion that is connected to the side member vertical plate portion from the inside in the vehicle width direction in a surface contact state, and a gusset lower plate portion that is connected to the side member lower plate portion in a surface contact state from above. Have one. A plurality of front lateral bolt insertion holes and a plurality of rear lateral bolt insertion holes are formed in the side member vertical plate portion. The rear lateral bolt insertion hole is formed behind the front lateral bolt insertion hole.

The FUP bracket has a FUP bracket mounting member and a FUP support member. The FUP bracket mounting member is fixed to the outside of the front end of the side member in the vehicle width direction and extends downward. The FUP support member is fixed to the lower end of the FUP bracket mounting member, and a front underlamp protector (FUP) is fixed to the front surface of the FUP support member.

Six FUP bracket bolt insertion holes are formed in the FUP bracket mounting member. Two of the six FUP bracket bolt insertion holes on the front side are formed at positions corresponding to two predetermined front side side bolt insertion holes among the plurality of front side side bolt insertion holes of the side member, and four on the rear side. The locations are formed at positions corresponding to four predetermined rear bolt insertion holes among the plurality of rear lateral bolt insertion holes of the side member. The front horizontal bolt that inserts the two FUP bracket bolt insertion holes on the front side inserts the front horizontal bolt insertion hole of the side member vertical plate portion and is screwed with the female screw portion of the horizontal bolt of the gusset. The rear horizontal bolt that inserts the four FUP bracket bolt insertion holes on the rear side inserts the rear horizontal bolt insertion hole of the side member vertical plate portion and is screwed with the horizontal nut behind the gusset.

JP-A-2018-1834

In the structure of Patent Document 1, the upper part (upper part of the bracket) of the FUP bracket is fastened and fixed to the side member vertical plate portion behind the FUP from the outside in the vehicle width direction. Of the upper part of the bracket, the front area in front of the vehicle is fastened to the gusset, but the rear area behind the vehicle is not fastened to the gusset.

When the FUP collides with the vehicle in front, the rearward load received by the FUP is input from the FUP bracket to the side member vertical plate portion. Since the vertical plate portion of the side member is reinforced by the gusset, the deformation of the side member is suppressed as compared with the case where the gusset is not provided.

However, when the FUP collides with the vehicle in front, the load input to the side member vertical plate portion from the upper part of the bracket to the rear of the vehicle is larger in the rear region than in the front region. On the other hand, in the structure of Patent Document 1, the rear region of the upper part of the bracket is not fastened together with the gusset. Therefore, the reinforcement by the gusset (reinforcing member) does not function sufficiently, and the side member may be deformed or damaged.

Therefore, an object of the present disclosure is to provide an underlamp protector support structure capable of suitably suppressing deformation or breakage of a sided member by a reinforcing member.

In order to achieve the above object, the first aspect of the present disclosure is an underramp locator support structure that supports an underramp rotator extending in the vehicle width direction at the lower part on one side in the front-rear direction of the vehicle, and the left and right side members. And an underrun protector bracket and a reinforcing member. Each of the left and right side members has a side member vertical plate portion that stands up along the vehicle front-rear direction and a side member lower plate portion that extends inward in the vehicle width direction from the lower end edge portion of the side member vertical plate portion. Side members extend in the front-rear direction of the vehicle on both sides of the vehicle in the vehicle width direction. The underrun protector bracket is a bracket that overlaps the side member vertical plate on the other side of the vehicle front and rear direction from the outside in the vehicle width direction, and a bracket that is placed below the upper part of the bracket to fix the underrun protector. Has a lower part. The reinforcing members are a reinforcing horizontal plate portion that overlaps the side member lower plate portion from above, and a reinforcing vertical plate portion that stands up from the outer edge portion of the reinforcing horizontal plate portion in the vehicle width direction and overlaps the side member vertical plate portion from the inside in the vehicle width direction. It has a plate part.

The upper part of the bracket has a first bracket area arranged on the other side in the vehicle front-rear direction and a second bracket area arranged on one side in the vehicle front-rear direction. The bracket first region and the bracket second region are fastened and fixed to the side member vertical plate portion from the vehicle width direction by at least one first fastening member and at least one second fastening member.

The reinforcing vertical plate portion has a reinforcing first region that sandwiches the side member vertical plate portion with the bracket first region. The bracket first region, the side member vertical plate portion, and the reinforcing first region are jointly fastened and fixed by the first fastening member.

In the above configuration, when a vehicle on one side in the front-rear direction collides with the underlamp protector, the load input from the upper part of the bracket to the side member vertical plate portion on the other side in the front-rear direction of the vehicle is the first region of the bracket on one side. The one is larger than the second area of the bracket on the other side, and the first area of the bracket, the vertical plate portion of the side member, and the first reinforcing area are jointly fastened and fixed by the first fastening member. Therefore, the reinforcing function of the side member by the reinforcing member can be improved, and the deformation and breakage of the side member can be suitably suppressed.

A second aspect of the present disclosure is the underrun protector support structure of the first aspect, in which at least two first regions of the bracket, the side member vertical plate portion, and the reinforcing first region are vertically separated from each other. 1 It is fastened together and fixed by the fastening member.

In the above configuration, since the bracket first region, the side member vertical plate portion, and the reinforcing first region are co-tightened and fixed by at least two first fastening members separated in the vertical direction, the load and moment received by the upper part of the bracket. Can be reliably transmitted to the reinforcing member, and the reinforcing function of the side member by the reinforcing member can be further improved.

A third aspect of the present disclosure is the underrun protector support structure of the first or second aspect, and the reinforcing vertical plate portion is a reinforcing second portion that sandwiches the side member vertical plate portion with the bracket second region. Has an area. The bracket second region, the side member vertical plate portion, and the reinforcing second region are jointly fastened and fixed by the second fastening member.

In the above configuration, since the bracket second region, the side member vertical plate portion, and the reinforcing second region are co-tightened and fixed by the second fastening member, the load and moment received by the upper part of the bracket are reliably transmitted to the reinforcing member. This makes it possible to further improve the reinforcing function of the side member by the reinforcing member.

A fourth aspect of the present disclosure is the underrun protector support structure of the first to third aspects, and the reinforcing horizontal plate portion is a side member lower plate portion on the other side in the vehicle front-rear direction with respect to the first fastening member. It has a reinforcing third region that overlaps with. The reinforcing third region is fastened and fixed to the side member lower plate portion from above and below by at least one third fastening member.

In the above configuration, when the vehicle collides with the underlamp protector from one side in the front-rear direction and the lower part of the bracket receives a load on the other side in the front-rear direction of the vehicle, the reinforcing third region of the reinforcing horizontal plate portion is lifted upward. The moment of Therefore, the load and the moment can be reliably transmitted to the reinforcing horizontal plate portion, and the reinforcing function of the side member by the reinforcing member can be further improved.

According to the underrun protector support structure of the present disclosure, deformation and breakage of the sided member can be suitably suppressed by the reinforcing member.

It is a side view which shows typically the vehicle which includes the underrun protector support structure of 1st Embodiment of this invention. It is a side view which looked at the main part of FIG. 1 from the inside in the vehicle width direction. It is a perspective view of a reinforcing member. FIG. 2 is a cross-sectional view taken along the line IV-IV of FIG. It is a cross-sectional view taken along the line VV of FIG. It is a side view which looked at the main part of the 2nd Embodiment of this invention from the inside in the vehicle width direction. FIG. 6 is a cross-sectional view taken along the line VII-VII of FIG. It is a side view which looked at the main part of the 3rd Embodiment of this invention from the inside in the vehicle width direction.

Hereinafter, the first embodiment of the present invention will be described with reference to FIGS. 1 to 5. In the figure, FR indicates the front of the vehicle, UP in the figure indicates the upper part of the vehicle, and IN in the figure indicates the inside in the vehicle width direction. Further, the left-right direction in the following description is a left-right direction in a state of facing the front of the vehicle.

In the vehicle 1 according to the present embodiment, as shown in FIG. 1, the cab 2 is generally an engine (not shown).
It is a cab-over type vehicle located in front of. The vehicle body frame 3 of the vehicle 1 includes left and right side members 4 and a plurality of cross members 5 (only the rear end cross member 5 is shown in FIG. 2). The side members 4 are arranged on both the left and right sides in the vehicle width direction and extend in the vehicle front-rear direction. Each cross member 5 extends in the vehicle width direction and connects the left and right side members 4.

Underlamp rotator brackets (UP brackets) 10 for supporting the rear underlamp locator (RUP) 40 are fixed to the rear ends of the left and right side members 4 (one end in the vehicle front-rear direction). .. The UP bracket 10 has a plate-shaped bracket upper portion 11 fixed to the side members 4 by bolts 31 to 35 described later, and a bracket lower portion 12 arranged below the bracket upper portion 11 and to which the RUP 40 is fixed. The RUP 40 supported by the UP bracket 10 extends in the vehicle width direction below the rear end of the vehicle body frame 3, and the upper portion 11 of the bracket is located on the vehicle front side (the other side in the vehicle front-rear direction) of the RUP 40. The RUP 40 suppresses the intrusion of another vehicle below the vehicle 1 when another vehicle (following vehicle) collides with the vehicle 1 from behind.

As shown in FIG. 4, the side member 4 has a U-shaped cross section that opens inward in the vehicle width direction, and the side member vertical plate portion 6, the side member upper plate portion 7, and the side member lower plate portion 8 are integrally formed. Have. The side member vertical plate portion 6 stands up along the vehicle front-rear direction. The side member upper plate portion 7 and the side member lower plate portion 8 are bent from the upper end edge portion and the lower end edge portion of the side member vertical plate portion 6 and extend inwardly facing each other in the vehicle width direction. The upper portion 11 of the bracket overlaps the rear end portion of the side member vertical plate portion 6 from the outside in the vehicle width direction. Since the side members 4 on both sides in the vehicle width direction, the UP bracket 10, and the reinforcing member 20 described later are configured substantially symmetrically with respect to the center of the vehicle 1 in the vehicle width direction, the configuration on the right side will be described below. However, the description of the configuration on the left side will be omitted.

As shown in FIGS. 2 to 4, the reinforcement of the L-shaped cross section having the reinforcing vertical plate portion 21 and the reinforcing lower plate portion (reinforcing horizontal plate portion) 22 integrally inside the U-shaped cross section of the side member 4. The member 20 is attached. The reinforcing lower plate portion 22 overlaps the side member lower plate portion 8 from above. The reinforcing vertical plate portion 21 is bent from the outer edge portion of the reinforcing lower plate portion 22 in the vehicle width direction, stands up upward, and overlaps the side member vertical plate portion 6 from the inside in the vehicle width direction. In the reinforcing member 20, the rear side of the reinforcing vertical plate portion 21 overlaps the front side of the bracket upper portion 11 with the side member vertical plate portion 6 sandwiched in the vehicle width direction, and the front side of the reinforcing vertical plate portion 21 is in front of the front end of the bracket upper portion 11. Arranged to extend to.

As described above, at the rear end of the side member 4, the reinforcing member 20 overlaps but the bracket upper portion 11 does not overlap from the front side of the vehicle to the rear side of the vehicle. There is a mounting reinforcement region 16 on which the brackets overlap, and a mounting non-reinforcing region 17 on which the bracket upper portion 11 overlaps but the reinforcing member 20 does not overlap. In the reinforcing non-mounting area 15 of the side member 4, a bolt insertion hole 25 penetrating the reinforcing lower plate portion 22 and the side member lower plate portion 8 (only the bolt insertion hole 25 of the reinforcing lower plate portion 22 is shown in FIG. 3). However, the mounting reinforcement region 16 has a bolt insertion hole 26 (see FIG. 4) penetrating the reinforcing vertical plate portion 21, the side member vertical plate portion 6 and the bracket upper portion 11, and the mounting non-reinforcing region 17 has a side member. Bolt insertion holes 27 (see FIG. 5) penetrating the vertical plate portion 6 and the bracket upper portion 11 are formed corresponding to the bolts 31 to 35 described later.

Of the bracket upper parts 11, the bracket upper front side region (bracket first region) 11A arranged on the vehicle front side (the other side in the vehicle front-rear direction) is at least one (two in the present embodiment) first row lateral bolt 31. And at least one (one in this embodiment) second row horizontal bolt 32, the side member vertical plate portion 6 is fastened and fixed from the vehicle width direction. The two first row horizontal bolts 31 are arranged at the upper height and the lower height, are arranged vertically, and penetrate the side member vertical plate portion 6 of the mounting reinforcement region 16. The second row horizontal bolt 32 is arranged at the lower height behind the first row horizontal bolt 31 and penetrates the side member vertical plate portion 6 of the mounting non-reinforcing region 17. The number of the first row horizontal bolts 31 and the second row horizontal bolts 32 can be arbitrarily set, and the second row horizontal bolts 32 can be omitted.

Of the bracket upper parts 11, the bracket upper rear side region (bracket second region) 11B arranged on the vehicle rear side (one side in the vehicle front-rear direction) is at least one (one in the present embodiment) third row lateral. The bolt 33 and at least one (one in the present embodiment) fourth row horizontal bolt 34 are fastened and fixed to the side member vertical plate portion 6 from the vehicle width direction. The third row horizontal bolt 33 is arranged at the lower height behind the second row horizontal bolt 32, and the fourth row horizontal bolt 34 is arranged at the upper height behind the third row horizontal bolt 33. The row horizontal bolt 33 and the fourth row horizontal bolt 34 penetrate the side member vertical plate portion 6 of the mounting non-reinforcing region 17. The number of the third row horizontal bolts 33 and the fourth row horizontal bolts 34 can be arbitrarily set, and one of the third row horizontal bolts 33 and the fourth row horizontal bolts 34 can be omitted.

Of the reinforcing vertical plate portions 21, the reinforcing vertical plate portion rear side region (reinforcing first region) 21A arranged on the vehicle rear side is attached between the reinforcing vertical plate portion 21 and the bracket upper front side region 11A. To sandwich. The upper front side region 11A of the bracket, the side member vertical plate portion 6, and the rear side region 21A of the reinforcing vertical plate portion are jointly tightened and fixed by the upper and lower first row horizontal bolts 31, and the upper and lower first row horizontal bolts 31 are fixed. It constitutes the first fastening member 36. The third row horizontal bolt 33 and the fourth row horizontal bolt 34 constitute a second fastening member 37 that fastens and fixes the upper rear region 11B of the bracket to the side member vertical plate portion 6. The first fastening member 36 and the second fastening member 37 are not limited to bolts, and may be other fastening members such as rivets.

Of the reinforcing lower plate portion 22, the reinforcing lower plate portion front side region (reinforcing third region) 22A arranged on the vehicle front side is below the side member of the reinforcing non-mounting region 15 on the vehicle front side of the upper and lower first row horizontal bolts 31. It overlaps the plate portion 8 from above. The front side region 22A of the reinforcing lower plate portion is fastened and fixed to the side member lower plate portion 8 from above and below by at least one (one in this embodiment) vertical bolt (third fastening member) 35. The number of vertical bolts 35 can be arbitrarily set, and instead of the vertical bolts 35, the reinforcing lower plate portion front side region 22A may be fixed to the side member lower plate portion 8 by rivets or the like.

When the UP bracket 10 is attached to the side member 4, the reinforcing lower plate portions 22 of the left and right reinforcing members 20 are overlapped on the side member lower plate portions 8 of the left and right side members 4, respectively, and the reinforcing lower plate portion front side region 22A and the side member lower A vertical bolt 35 is inserted into a bolt insertion hole 25 penetrating the plate portion 8, and a nut 38 is screwed into the vertical bolt 35 and temporarily fastened. Then, the nuts 38 are screwed into the bolt insertion holes 26 and 27 corresponding to the horizontal bolts 31, 32, 33 and 34, and all the bolts 31 to 35 are tightened. As a result, the UP bracket 10 and the reinforcing member 20 are fastened and fixed to the side member 4. The nut 38 may be a weld nut in order to improve the fastening workability of the bolts 31 to 35.

Further, in the present embodiment, the left and right reinforcing members 20 have the same shape so that one reinforcing member 20 can be attached to any of the left and right side members 4. Specifically, upper and lower bolt insertion holes 26 through which the upper and lower first row horizontal bolts 31 are inserted are formed in the reinforcing vertical plate portion 21 for each of one set (four in total) for the right side and one for the left side, and the vertical bolt 35 is formed. The bolt insertion holes 25 through which the bolts are inserted are formed in the reinforcing lower plate portion 22 one by one (two in total) for the right side and one for the left side. In the illustrated example, of the four bolt insertion holes 26 of the reinforcing vertical plate portion 21, the upper and lower two bolt insertion holes 26A on the right side of FIG. 3 are for the right side, and the upper and lower two bolt insertion holes 26B on the left side of FIG. 3 are for the right side. It is for the left. Of the two bolt insertion holes 25 of the reinforcing lower plate portion 22, the bolt insertion hole 25A on the left side in FIG. 3 is for the right side, and the bolt insertion hole 25B on the right side in FIG. 3 is for the left side. For example, when the reinforcing member 20 is assembled to the right side member 4, the two upper and lower bolt insertion holes 26A on the rear side of the vehicle of the reinforcing vertical plate portion 21 and the bolt insertion holes 25A on the front side of the vehicle of the reinforcing lower plate portion 22 are formed. It is used, and the other three bolt insertion holes 26B and 25B are not used. On the contrary, when the reinforcing member 20 is assembled to the left side member 4, the two upper and lower bolt insertion holes 26B on the rear side of the vehicle of the reinforcing vertical plate portion 21 and the bolt insertion holes 25B on the front side of the vehicle of the reinforcing lower plate portion 22. Is used, and the other three bolt insertion holes 26A and 25A are not used.

According to the present embodiment, when a rear vehicle (following vehicle) collides with the RUP 40, the load input from the bracket upper portion 11 to the side member vertical plate portion 6 on the vehicle front side is larger in the bracket upper front side region 11A. It is larger than the bracket upper rear region 11B, and the bracket upper front region 11A, the side member vertical plate portion 6 and the reinforcing vertical plate rear region 21A are jointly tightened and fixed by the first row horizontal bolt 31. Therefore, the reinforcing function of the side member 4 by the reinforcing member 20 can be improved, and the deformation and breakage of the side member 4 can be suitably suppressed.

Further, since the bracket upper front side region 11A, the side member vertical plate portion 6 and the reinforcing vertical plate rear side region 21A are jointly tightened and fixed by two first row horizontal bolts 31 which are vertically separated from each other, the bracket upper portion 11 It is possible to reliably transmit the load and moment received by the reinforcing member 20 to the reinforcing member 20. Further, when the following vehicle collides with the RUP 40 and the lower portion 12 of the bracket receives a load on the front side of the vehicle, a moment in the direction in which the front side region 22A of the reinforcing lower plate portion is lifted upward acts on the reinforcing member 20, but the reinforcing lower plate Since the front side region 22A of the portion is fastened and fixed to the side member lower plate portion 8 from the vertical direction by the vertical bolt 35, the upward movement (lifting) of the front side region 22A of the reinforcing lower plate portion is restricted, and the load and the moment are reinforced. It can be reliably transmitted to the lower plate portion 22. Therefore, the reinforcing function of the side member 4 by the reinforcing member 20 can be further improved.

Next, a second embodiment of the present invention will be described with reference to FIGS. 6 and 7. Since the shape of the reinforcing member is different between the present embodiment and the first embodiment and the other configurations are common, the same reference numerals are given to the configurations common to the first embodiment and the description thereof will be omitted.

The reinforcing member 42 of the present embodiment has a U-shaped cross section in which the reinforcing upper plate portion 23 and the reinforcing lower plate portion 22 are bent and extend from the upper end edge portion and the lower end edge portion of the reinforcing vertical plate portion 21 so as to face each other. The plate portion 21 overlaps the side member vertical plate portion 6 from the inside in the vehicle width direction, the reinforcing lower plate portion 22 overlaps the side member lower plate portion 8 from above, and the reinforcing upper plate portion 23 overlaps the side member upper plate portion 7 from below. Overlap. The front portion of the reinforcing member 42 extends longer toward the front side of the vehicle than the bracket upper portion 11, and reinforces the side member 4 in a wide range.

The reinforcing vertical plate portion rear side region 21A overlaps substantially the entire area of the bracket upper front side region 11A, and the bracket upper front side region 11A, the side member vertical plate portion 6 and the reinforcing vertical plate portion rear side region 21A are in the upper and lower first rows. The horizontal bolts 31 and the second row horizontal bolts 32 are fastened together and fixed, and the upper and lower first row horizontal bolts 31 and the second row horizontal bolts 32 form the first fastening member 36. At the rear end of the side member 4, there are a reinforced non-reinforcing area 15, a mounting and non-reinforcing area 16, and a mounting and non-reinforcing area 17 from the front side of the vehicle to the rear side of the vehicle.

Of the reinforcing lower plate portions 22, the reinforcing lower plate portion front side region 22A arranged on the vehicle front side is rivet on the side member lower plate portion 8 of the reinforcing non-mounting region 15 on the vehicle front side of the upper and lower first row horizontal bolts 31. (Third fastening member) 28 is fastened and fixed. Similarly, of the reinforcing upper plate portion 23, the reinforcing upper plate portion front side region 23A arranged on the vehicle front side is the side member upper plate portion 7 of the reinforcing non-mounting region 15 on the vehicle front side of the upper and lower first row horizontal bolts 31. , It is fastened and fixed by the rivet 29.

According to the present embodiment, the bracket upper front side region 11A, the side member vertical plate portion 6 and the reinforcing vertical plate portion rear side region 21A are vertically separated from each other by two first row horizontal bolts 31 and a first row horizontal bolt. Since it is fastened and fixed together with the second row horizontal bolt 32 that is separated from the 31 on the rear side, the load and the moment received by the bracket upper portion 11 can be more reliably transmitted to the reinforcing member 20.

Further, since the reinforcing upper plate portion 23 overlaps the side member upper plate portion 7 from below, the upward movement (lifting) of the reinforcing lower plate portion front side region 22A is caused by the reinforcing upper plate portion 23 and the side member upper plate portion 7. Regulated by interference, loads and moments can be more reliably transmitted to the reinforced lower plate portion 22.

Next, a third embodiment of the present invention will be described with reference to FIG. Since the shape of the reinforcing member is different from the present embodiment and the first embodiment and the second embodiment, and other configurations are common, the same reference numerals are given to the configurations common to the first embodiment and the second embodiment. Is added to omit the description.

In the reinforcing member 43 of the present embodiment, similarly to the second embodiment, the reinforcing upper plate portion 23 and the reinforcing lower plate portion 22 are bent and extend from the upper end edge portion and the lower end edge portion of the reinforcing vertical plate portion 21 so as to face each other. It has a U-shaped cross section, and the rear end of the reinforcing member 43 extends toward the rear side of the vehicle from the rear end of the bracket upper portion 11.

The reinforcing vertical plate portion rear side region 21A overlaps substantially the entire area of the bracket upper portion 11 (bracket upper front side region 11A and bracket upper rear side region 11B). The upper front side region 11A of the bracket, the side member vertical plate portion 6, and the rear side region 21A of the reinforcing vertical plate portion are fastened and fixed together by the upper and lower first row horizontal bolts 31 and the second row horizontal bolts 32, and the upper part of the bracket is fixed. The rear side region 11B, the side member vertical plate portion 6, and the reinforcing vertical plate portion rear side region 21A are jointly tightened and fixed by the third row horizontal bolt 33 and the fourth row horizontal bolt 34. That is, the reinforcing vertical plate portion rear side region 21A of the present embodiment is the reinforcing first region that sandwiches the side member vertical plate portion 6 between the reinforcing vertical plate portion rear side region 11A and the bracket upper front side region 11A, and is between the reinforcing vertical plate portion rear side region 11B and the bracket upper upper rear side region 11B. This is a reinforcing second region that sandwiches the side member vertical plate portion 6. At the rear end of the side member 4, from the front side of the vehicle to the rear side of the vehicle, there are a reinforced non-reinforcing region 15, a mounting reinforced region 16, and a reinforced non-reinforcing region 15, and the mounting non-reinforcing region 17 does not exist.

According to the present embodiment, the bracket upper rear side region 11B, the side member vertical plate portion 6, and the reinforcing vertical plate portion rear side region 21A are jointly tightened and fixed by the third row horizontal bolt 33 and the fourth row horizontal bolt 34. Therefore, the load and moment received by the bracket upper portion 11 can be more reliably transmitted to the reinforcing member 20.

Although the present invention has been described above based on the above-described embodiment, the present invention is not limited to the contents of the above-described embodiment, and can be appropriately modified without departing from the present invention. That is, it goes without saying that all other embodiments, examples, operational techniques, and the like made by those skilled in the art based on this embodiment are included in the category of the present invention.

For example, in the above embodiment, the support structure of the RUP 40 has been described, but the support structure of the front underlamp locator (FUP) 41 (see FIG. 1) arranged below the front end portion of the vehicle 1 is the same as the support structure of the RUP 40. It may be configured as.

INDUSTRIAL APPLICABILITY The present invention can be applied to a vehicle in which a side member supports an underlamp protector via an underlamp protector bracket.

1: Vehicle 2: Cab 3: Body frame 4: Side member 5: Cross member 6: Side member vertical plate 7: Side member upper plate 8: Side member lower plate 10: Underlamp protector bracket 11: Bracket upper 11A : Bracket upper front area (bracket first area)
11B: Upper bracket rear area (bracket second area)
12: Bracket lower part 15: Reinforcement non-mounting area 16: Mounting reinforcement area 17: Mounting non-reinforcing area 20, 42, 43: Reinforcing member 21: Reinforcing vertical plate portion 21A: Reinforcing vertical plate portion rear side region (reinforcing first region, Reinforcement second area)
22: Reinforced lower plate (reinforced horizontal plate)
22A: Reinforced lower plate front side area (reinforced third area)
23: Reinforcing upper plate portions 25, 26, 27: Bolt insertion holes 28: Rivets (third fastening member)
29: Rivet 31: 1st row horizontal bolt 32: 2nd row horizontal bolt 33: 3rd row horizontal bolt 34: 4th row horizontal bolt 35: Vertical bolt (3rd fastening member)
36: 1st fastening member 37: 2nd fastening member 38: Nut 40: Rear under lamp protector (under lamp protector)
41: Front underrun protector (underrun protector)

Claims (4)

It is an underramp protector support structure that supports an underramp protector extending in the vehicle width direction at the lower part on one side in the front-rear direction of the vehicle.
It has a side member vertical plate portion that stands up along the vehicle front-rear direction and a side member lower plate portion that extends inward in the vehicle width direction from the lower end edge portion of the side member vertical plate portion, and is provided on both sides of the vehicle in the vehicle width direction. Left and right side members extending in the front-rear direction of the vehicle,
An upper part of the bracket that overlaps the side member vertical plate portion from the outside in the vehicle width direction on the other side of the vehicle front-rear direction with respect to the underlamp protector, and a lower part of the bracket that is arranged below the upper part of the bracket and to which the underlamp protector is fixed. With underrun protector bracket,
A reinforcing horizontal plate portion that overlaps the side member lower plate portion from above, and a reinforcing vertical plate that stands up from the outer edge portion of the reinforcing horizontal plate portion in the vehicle width direction and overlaps the side member vertical plate portion from the inside in the vehicle width direction. With a reinforcing member having a portion,
The upper portion of the bracket has a bracket first region arranged on the other side in the vehicle front-rear direction and a bracket second region arranged on the one side in the vehicle front-rear direction.
The bracket first region and the bracket second region are fastened and fixed to the side member vertical plate portion from the vehicle width direction by at least one first fastening member and at least one second fastening member.
The reinforcing vertical plate portion has a reinforcing first region that sandwiches the side member vertical plate portion between the reinforcing vertical plate portion and the bracket first region.
An underlamp protector support structure, characterized in that the bracket first region, the side member vertical plate portion, and the reinforcing first region are jointly fastened and fixed by the first fastening member. The underrun protector support structure according to claim 1.
The bracket first region, the side member vertical plate portion, and the reinforcing first region are jointly fastened and fixed by at least two first fastening members separated in the vertical direction. Support structure. The underrun protector support structure according to claim 1 or 2.
The reinforcing vertical plate portion has a reinforcing second region that sandwiches the side member vertical plate portion between the reinforcing vertical plate portion and the bracket second region.
An underlamp protector support structure, characterized in that the bracket second region, the side member vertical plate portion, and the reinforcing second region are jointly fastened and fixed by the second fastening member. The underrun protector support structure according to any one of claims 1 to 3.
The reinforcing horizontal plate portion has a reinforcing third region that overlaps with the side member lower plate portion on the other side in the vehicle front-rear direction with respect to the first fastening member.
The reinforcing third region is an underlamp protector support structure characterized in that the reinforcing third region is fastened and fixed to the side member lower plate portion from above and below by at least one third fastening member.

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