JP2007001347A - Bumper support member mounting structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bumper support member mounting structure capable of reducing shock energy transmitted to a vehicle body frame. <P>SOLUTION: This bumper support member mounting structure mounts a bumper support member 4 to a vehicle body frame 1 via a stay 2. The vehicle body frame 1 comprises a side member 6 and a sub frame 8. A stay mounting part 10 mounted to the stay 2 is installed to a sub frame 8. The stay 2, the stay mounting part 10, and the sub frame 8 are formed in a manner that rigidity in a vehicle forward and backward direction of the stay 2 is lower than rigidity in a vehicle forward and backward direction of the stay mounting part 10, and that rigidity in a vehicle forward and backward direction of the stay mounting part 10 is lower than rigidity in a vehicle forward and backward direction of the sub frame 8. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a mounting structure for a bumper support member that can reduce collision energy transmitted to a vehicle body frame at the time of a vehicle collision, for example.

Conventionally, as a structure for attaching a bumper support member to a vehicle body frame via a stay, for example, a bumper support member attachment structure described in Patent Document 1 has been used. In such a bumper support member mounting structure, the bumper support member is attached to the stay using bolts, and the stay to which the bumper support member is attached is attached to the vehicle body frame using bolts.
Japanese Utility Model Publication No. 3-103848 (FIGS. 7 and 8)

However, in the bumper support member mounting structure described in Patent Document 1, if excessive collision energy is input to the bumper support member from the vehicle front-rear direction during a vehicle collision, the collision transmitted to the vehicle body frame via the stay Due to the energy, there is a risk that the vehicle body frame will be deformed, which is difficult to repair as compared with the stay and is expensive to replace.
In addition, in the structure in which the bumper support member and the stay, and the stay and the vehicle body frame are fastened using bolts as in the bumper support member mounting structure described in Patent Document 1, the bumper support member is excessively large from the vehicle front-rear direction. In order to cope with a large collision energy, it is necessary to increase the diameter of the bolt and to improve the strength of the bearing surface. For this reason, since the mass of a volt | bolt increases and a volt | bolt enlarges, there exists a problem that the freedom degree of a layout will fall.
The present invention has been made paying attention to the above-mentioned problems, and provides a mounting structure for a bumper support member that can reduce the collision energy transmitted to the vehicle body frame and can improve the degree of freedom of layout. The task is to do.

In order to solve the above problems, the present invention provides a bumper support member mounting structure for mounting a bumper support member to a vehicle body frame via a stay.
The body frame is provided with a stay attaching portion for attaching the stay,
The bumper support member mounting structure is characterized in that the rigidity of the stay in the vehicle longitudinal direction and the rigidity of the stay mounting portion in the vehicle longitudinal direction are lower than the rigidity of the vehicle body frame in the vehicle longitudinal direction. .

  According to the present invention, at the time of a vehicle collision, the collision energy input to the bumper support member from the vehicle front-rear direction is transmitted to the vehicle body frame after being absorbed by the stay and the stay mounting portion, and thus transmitted to the vehicle body frame. The collision energy can be reduced.

Embodiments of the present invention will be described below with reference to the drawings.
First, the configuration of the present embodiment will be described with reference to FIGS. In the present embodiment, the bumper support member mounting structure of the front bumper will be described as an example of the bumper support member mounting structure. However, the present invention is not limited to this, and the bumper support member mounting structure of the present embodiment is not limited thereto. Can also be applied to the bumper support member mounting structure of the rear bumper.

As shown in FIG. 1, the bumper support member mounting structure of the present embodiment is a structure in which a bumper support member 4 is mounted on a vehicle body frame 1 via a stay 2.
The vehicle body frame 1 includes a side member 6 and a sub frame 8 that form a vehicle body. The subframe 8 is fastened at a fastening point P1 below the side member 6 in the vehicle vertical direction and is supported by the side member 6. A stay mounting portion 10 is provided in front of the subframe 8 in the vehicle front-rear direction.

The stay 2 is formed in a shape extending in the vehicle front-rear direction, and is fastened at the fastening point P2 and supported by the side member 6 below the side member 6 in the vehicle vertical direction. The fastening force between the stay 2 and the side member 6 is smaller than the fastening force between the subframe 8 and the side member 6. The stay 2 has a bumper support member 4 attached to the front side in the vehicle longitudinal direction and a rear side in the vehicle longitudinal direction attached to the stay mounting portion 10.
Further, the stay 2, the stay mounting portion 10, and the sub-frame 8 are each configured such that the rigidity of the stay 2 in the vehicle front-rear direction is lower than the rigidity of the stay mounting portion 10 in the vehicle front-rear direction. Is lower than the rigidity of the subframe 8 in the vehicle front-rear direction.

  As shown in FIG. 2, the rear side of the stay 2 in the vehicle front-rear direction is attached to the stay attaching portion 10 using first fastening members 12 a and 12 b that form fastening members between the stay 2 and the stay attaching portion 10. . The details of the mounting state of the stay 2 to the stay mounting portion 10 will be described later. In FIG. 2, the side member 6 is not shown.

  As shown in FIG. 3, a stabilizer mount portion 14 is provided in the vicinity of the stay mounting portion 10 in the subframe 8. The stay mounting portion 10 is formed integrally with the subframe 8 and has an open cross-section portion 16 provided with an opening in the vehicle vertical direction as viewed from the vehicle front-rear direction. 16, the rear side of the stay 2 in the vehicle front-rear direction is inserted. Further, the opening of the open section 16 is closed by a closing member 18. 3 shows a state in which only the opening of the open section 16 on the right side is closed by the closing member 18 for the sake of explanation. In FIG. 3, the side member 6 is not shown.

  Further, the subframe 8 overlaps at least partly with the stay 2 when viewed from the vehicle front-rear direction, and has a stopper portion 20 at the rear side of the vehicle front-rear direction from the stay mounting portion 10, that is, at a position on the vehicle compartment side. . The stopper portion 20 has a plurality of plate members 22 formed integrally with the subframe 8, and each plate member 22 is inclined with respect to a parallel plate member 22 a parallel to the vehicle width direction and the vehicle width direction. It is comprised from the inclination board | plate material 22b.

Hereinafter, with reference to FIG.4 and FIG.5, the attachment state to the stay attaching part 10 of the stay 2 is demonstrated.
FIG. 4 is an enlarged view of a range surrounded by a broken line in FIG. As shown in FIG. 4, two stay positioning holes 24 a and 24 b penetrating in the vehicle vertical direction are provided in a portion overlapping the stay 2 of the open section 16 when viewed from the vehicle vertical direction. The stay positioning holes 24a and 24b are offset from each other in the vehicle longitudinal direction and the vehicle width direction.

Two stay mounting holes 26a and 26b penetrating in the vehicle vertical direction are provided at positions where the stay positioning holes 24a and 24b of the stay 2 overlap with the vehicle vertical direction, respectively. These stay mounting holes 26a and 26b both extend in the vehicle front-rear direction, and the opening area in the vehicle front-rear direction of each stay mounting hole 26a, 26b is the vehicle front-rear direction of each stay positioning hole 24a, 24b. It is larger than the opening area. The stay mounting hole 26a overlaps with the stay positioning hole 24a when viewed from the vehicle vertical direction, and a gap Ca is formed between the stay mounting hole 26a and the stay positioning hole 24a on the bumper support member 4 side, that is, forward in the vehicle front-rear direction. Is provided at a position where is formed. The stay mounting hole 26b overlaps with the stay positioning hole 24b when viewed from the vehicle vertical direction, and a gap Cb is provided between the stay mounting hole 26b and the stay positioning hole 24b on the bumper support member 4 side, that is, forward in the vehicle front-rear direction. Is provided at a position where is formed. That is, the stay mounting hole 26a and the stay mounting hole 26b are offset from each other in the vehicle longitudinal direction and the vehicle width direction.
A vehicle body frame-side positioning hole 28 that opens toward the closing member 18 is provided in a portion of the subframe 8 that overlaps with the closing member 18 when viewed from the vehicle width direction.

  5 shows a state in which the opening of the open section 16 shown in FIG. 4 is closed by the closing member 18, that is, the left open section 16 in FIG. 3 is replaced with the right open section 16 in FIG. The state obstruct | occluded with the obstruction | occlusion member 18 is shown. As shown in FIG. 5, the closing member 18 has a substantially L shape as a whole, and penetrates in the vehicle vertical direction at a position overlapping the stay mounting holes 26 a and 26 b of the blocking member 18 when viewed from the vehicle vertical direction. Two stay side mounting holes 30a and 30b are provided respectively. A vehicle body frame side mounting hole 32 penetrating in the vehicle width direction is provided at a position overlapping the vehicle body frame side positioning hole 28 of the closing member 18 when viewed from the vehicle width direction. The stay side mounting hole 30a is provided at a position overlapping the stay positioning hole 24a when viewed from the vehicle vertical direction, and the stay side mounting hole 30b is provided at a position overlapping the stay positioning hole 24b when viewed from the vehicle vertical direction. It has been. That is, the stay side mounting hole 30a and the stay side mounting hole 30b are offset from each other in the vehicle longitudinal direction and the vehicle width direction.

  Therefore, the stay positioning hole 24a and the stay mounting hole 26a, and the stay mounting hole 26a and the stay side mounting hole 30a overlap each other when viewed from the vehicle vertical direction. The stay positioning hole 24a, the stay mounting hole 26a, and the stay side mounting hole 30a are overlapped. The stay 2, the subframe 8, and the closing member 18 are fastened by the first fastening member 12a that passes therethrough. Similarly, the stay positioning hole 24b and the stay mounting hole 26b, and the stay mounting hole 26b and the stay side mounting hole 30b overlap each other when viewed from the vehicle vertical direction, and the stay positioning hole 24b, the stay mounting hole 26b, and the stay side mounting hole 30b. The stay 2, the subframe 8, and the closing member 18 are fastened by the first fastening member 12 b that passes through the first fastening member 12 b.

  Here, a gap Ca is formed between the stay positioning hole 24a and the stay mounting hole 26a in the front of the vehicle in the front-rear direction, so that the vehicle is between the stay mounting hole 26a and the first fastening member 12a. A gap (not shown) having the same length in the vehicle front-rear direction as the gap Ca is formed in the front in the front-rear direction. Similarly, a gap Cb is formed in front of the vehicle longitudinal direction between the stay positioning hole 24b and the stay mounting hole 26b, and therefore, there is a vehicle between the stay mounting hole 26b and the first fastening member 12b. A gap (not shown) having the same length in the vehicle front-rear direction as the gap Cb is formed in the front in the front-rear direction.

The body frame 1 and the closing member 18 are fastened by a second fastening member 34 that passes through the body frame side positioning hole 28 and the body frame side attachment hole 32.
Further, at least a part of the closing member 18 overlapping with the stay 2 when viewed from the vehicle vertical direction is fastened by the first fastening members 12a and 12b to the stay 2, the stay mounting portion 10 and the closing member 18. The stay 2 is in pressure contact with the stay 2.

Next, functions and effects of this embodiment will be described.
When the vehicle collides with an obstacle or the like during traveling of the vehicle, collision energy Ec from the vehicle front-rear direction is input to the bumper support member 4. Here, the rigidity of the stay 2 in the vehicle front-rear direction is lower than the rigidity of the stay attachment portion 10 in the vehicle front-rear direction. Low. Further, the fastening force between the stay 2 and the side member 6 is smaller than the fastening force between the subframe 8 and the side member 6. For this reason, the collision energy Ec is first transmitted to the stay 2 having the lowest rigidity in the longitudinal direction of the vehicle, and the collision energy Ec transmitted to the stay 2 is absorbed by the deformation generated in the stay 2.

  When all of the collision energy Ec is not absorbed by the deformation of the stay 2, the excess energy Eo1 that has not been absorbed is transmitted to the attachment portion of the stay 2 to the stay attachment portion 10, and the excess energy Eo1 causes the stay 2 to Displaces backward in the vehicle longitudinal direction. Here, a gap having the same length in the vehicle front-rear direction as the gap Ca is formed in front of the vehicle front-rear direction between the stay attachment hole 26 a and the first fastening member 12 a. A gap having the same length in the vehicle front-rear direction as the gap Cb is formed in front of the vehicle 12 in the front-rear direction. Therefore, the stay 2 is displaced rearward in the vehicle front-rear direction by the length of the gaps Ca, Cb in the vehicle front-rear direction due to the excess energy Eo1. At this time, the stay mounting hole 26a and the first fastening member 12a, the stay mounting hole 26b and the first fastening member 12b slide with each other with friction resistance, and the stay 2, the subframe 8 and the closing member 18 are friction resistance. And slides on each other while absorbing excess energy Eo1.

When all of the excess energy Eo1 is not absorbed by the displacement of the stay 2 and the stay mounting portion 10 is deformed and the stay 2 collides with the stopper portion 20, the excess energy Eo2 that has not been absorbed is transmitted to the stopper portion 20. Due to this collision, the stopper portion 20 is deformed, and the excess energy Eo2 is absorbed.
When all of the excess energy Eo2 is not absorbed by the deformation of the stopper portion 20, the excess energy Eo3 that has not been absorbed is transmitted to the subframe 8, and the subframe 8 is deformed to absorb the excess energy Eo3. .
When all of the excess energy Eo3 is not absorbed by the deformation of the subframe 8, the excess energy Eo4 that has not been absorbed is transmitted to the fastening point P1, and the side member 6 is deformed to absorb the excess energy Eo4. .

  Therefore, with the bumper support member mounting structure of the present embodiment, even if collision energy from the vehicle front-rear direction is input to the bumper support member 4, the collision energy is maintained in the stay 2, the stay mounting portion 10, and the stopper portion 20. After being absorbed in the order of the subframes 8, they are transmitted to the side members 6. As a result, the collision energy transmitted to the side member 6 can be reduced. In addition, when the collision energy is small, the collision energy transmitted to the side member 6 does not reach the strength at which the side member 6 is deformed, and therefore the deformation of the side member 6 can be prevented. Furthermore, when the collision energy is smaller, the collision energy transmitted to the subframe 8 does not reach the strength at which the subframe 8 is deformed, so that the deformation of the subframe 8 and the side member 6 can be prevented.

  In the bumper support member mounting structure according to the present embodiment, for example, when a pedestrian collides with the vehicle, the pedestrian has the bumper support member 4, stay 2, stay mounting portion 10, stopper portion 20, sub Since the impact is received from the vehicle in the order of the frame 8 and the impact energy is sequentially absorbed at these portions, the compatibility can be improved. Note that compatibility means that automobiles, motorcycles, and pedestrians of different sizes ensure their safety (mainly improving the strength of small cars and reducing the harmfulness of large cars).

Furthermore, the bumper support member mounting structure of the present embodiment can cope with excessive collision energy without the need for increasing the diameter of the first fastening member 12 and the second fastening member 34 and improving the strength of the seating surface. Therefore, the degree of freedom in layout is improved.
In the bumper support member mounting structure of the present embodiment, the two stay positioning holes 24a and 24b, the stay mounting holes 26a and 26b, and the stay side mounting holes 30a and 30b are offset in the vehicle longitudinal direction. ing. For this reason, the rigidity with respect to the input from the vehicle width direction to the stay 2 is improved.

  In the bumper support member mounting structure of the present embodiment, the two stay positioning holes 24a, 24b, the stay mounting holes 26a, 26b, and the stay side mounting holes 30a, 30b are offset from each other in the vehicle width direction. ing. As a result, when a plurality of various holes are provided in the stay 2, the stay attaching portion 10, and the closing member 18, it is not necessary to provide the plurality of holes in the vehicle front-rear direction, and the degree of freedom in layout is improved.

  In the bumper support member mounting structure of the present embodiment, the stay mounting portion 10 is formed integrally with the subframe 8, and an opening is provided below the vehicle vertical direction as viewed from the vehicle longitudinal direction. It has an open cross section 16. For this reason, the rigidity of the stabilizer mount portion 14 is improved to improve the roll stiffness when the vehicle turns, and the stay mounting portion 10 has a closed cross-sectional portion that forms a hollow closed cross-section when viewed from the vehicle front-rear direction. Compared to the case, the sub-frame 8 can be easily molded, the productivity is improved, and the molding accuracy is improved.

Further, in the bumper support member mounting structure of the present embodiment, the opening of the open section 16 is closed by the closing member 18, so that the rigidity of the stabilizer mount 14 is improved and the stay 2 and the stay 2 are fixed. The fastening force between the mounting portion 10 and the closing member 18 is improved, and the rigidity against displacement in the vehicle vertical direction generated in the stay 2 at the time of a vehicle collision is improved.
Further, in the bumper support member mounting structure of the present embodiment, since the closing member 18 is fastened to the subframe 8 by the second fastening member 34, the stay 2, the stay attaching portion 10, and the closing member 18 are connected. Fastening force is improved.

  In the bumper support member mounting structure of the present embodiment, the stay 2, the stay mounting portion 10, and the sub-frame 8 are each configured such that the rigidity of the stay 2 in the vehicle longitudinal direction is the rigidity of the stay mounting portion 10 in the vehicle longitudinal direction. The rigidity of the stay mounting portion 10 in the vehicle front-rear direction is lower than the rigidity of the subframe 8 in the vehicle front-rear direction. However, the present invention is not limited to this. That is, the stay 2 and the stay mounting portion 10 and the sub frame 8 are formed such that the rigidity of the stay mounting portion 10 and the stay 2 in the vehicle front-rear direction is lower than the rigidity of the sub frame 8 in the vehicle front-rear direction. That's fine. Therefore, the stay 2 and the stay mounting portion 10 may be formed such that the rigidity of the stay mounting portion 10 in the vehicle front-rear direction is lower than the rigidity of the stay 2 in the vehicle front-rear direction. Further, the stay 2 and the stay mounting portion 10 may be formed such that the rigidity of the stay 2 in the vehicle front-rear direction is equal to the rigidity of the stay mounting portion 10 in the vehicle front-rear direction.

Further, in the mounting structure of the bumper support member of the present embodiment, the configuration of the vehicle body frame 1 is configured to include the side member 6 and the sub frame 8, but is not limited thereto, and does not include the sub frame 8. It is good also as a structure. In this case, a stay mounting portion 10 is provided on the side member 6.
Further, in the mounting structure of the bumper support member of the present embodiment, the configuration of the subframe 8 is configured to include the stopper portion 20, but is not limited thereto, and the configuration of the subframe 8 is configured to include the stopper portion 20. It is good also as a structure which does not have.

Furthermore, in the mounting structure of the bumper support member of the present embodiment, the shape of the stay mounting hole 26 is formed in a shape extending in the vehicle front-rear direction, but the shape is not limited to this, and the shape of the stay mounting hole 26 May be formed in the same shape as the stay positioning hole 24.
In the bumper support member mounting structure of the present embodiment, two stay positioning holes 24, stay mounting holes 26, and stay side mounting holes 30 are provided, but the present invention is not limited to this. That is, only one stay positioning hole 24, stay mounting hole 26, and stay side mounting hole 30 may be provided. Three or more stay positioning holes 24, stay mounting holes 26, and stay side mounting holes 30 may be provided. In this case, it is preferable that at least two of the three or more are offset from each other in the vehicle longitudinal direction and the vehicle width direction.

  Further, in the bumper support member mounting structure of the present embodiment, the two stay positioning holes 24a and 24b, the stay mounting holes 26a and 26b, and the stay side mounting holes 30a and 30b are arranged in the vehicle longitudinal direction and the vehicle width direction, respectively. Although offset, it is not limited to this. That is, the stay positioning holes 24a and 24b, the stay mounting holes 26a and 26b, and the stay side mounting holes 30a and 30b may be provided at positions overlapping each other when viewed from at least one of the vehicle longitudinal direction and the vehicle width direction.

  Further, in the bumper support member mounting structure of the present embodiment, the structure of the stay mounting portion 10 is formed integrally with the subframe 8, and an opening is provided below the vehicle vertical direction as viewed from the vehicle longitudinal direction. However, the present invention is not limited to this. That is, the structure of the stay mounting portion 10 may be formed integrally with the subframe 8 and may have a closed cross section that forms a hollow closed cross section when viewed from the vehicle front-rear direction. In this case, the rigidity of the stay mounting portion 10 is improved, and the rigidity of the stabilizer mount portion 14 provided in the vicinity of the stay mounting portion 10 is improved.

Further, in the mounting structure of the bumper support member of the present embodiment, the open cross section 16 is configured to have the open cross section 16 provided with an opening below the vehicle vertical direction when viewed from the vehicle front-rear direction. It is not limited to. That is, the opening direction of the opening is not limited to the lower side in the vehicle vertical direction, and a plurality of openings may be provided.
Moreover, in the mounting structure of the bumper support member of the present embodiment, the opening of the open section 16 is closed by the closing member 18, but the present invention is not limited to this, and the opening of the open section 16 is not closed. It is good also as a structure.
Further, in the mounting structure of the bumper support member of the present embodiment, the stay mounting portion 10 is configured to have the open cross-section portion 16, but the present invention is not limited to this. You may form in the plate shape extended in a direction.

In the mounting structure of the bumper support member of this embodiment, the stay 2, the subframe 8, and the closing member 18 are connected by the first fastening member 12 that passes through the stay positioning hole 24, the stay mounting hole 26, and the stay side mounting hole 30. Although it has concluded, it is not limited to this. That is, for example, the stay 2 and the subframe 8 may be coupled by welding or the like, and the stay 2 and the closing member 18 may be coupled by welding or the like. Further, the first fastening member 12 may be passed through the stay positioning hole 24 and the stay mounting hole 26 to fasten the stay 2 and the subframe 8, and the first fastening member 12 may pass through the stay mounting hole 26 and the stay side mounting hole 30. The stay 2 and the closing member 18 may be fastened by three fastening members (not shown).
Further, in the bumper support member mounting structure of the present embodiment, the closing member 18 is fastened to the subframe 8 by the second fastening member 34, but is not limited to this. The subframe 8 may be joined by welding or the like.

It is a figure which shows the attachment structure of the bumper support member of this invention. It is a figure which shows the attachment structure of the bumper support member of this invention. It is a figure which shows the attachment structure of the bumper support member of this invention. FIG. 4 is an enlarged view of a range surrounded by a broken line in FIG. 3. FIG. 5 is a perspective view of FIG. 4.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Body frame 2 Stay 4 Bumper support member 6 Side member 8 Sub frame 10 Stay attachment part 12 First fastening member 14 Stabilizer mount part 16 Open section 18 Blocking member 20 Stopper part 22 Plate material 24 Stay positioning hole 26 Stay attachment hole 28 Vehicle body Frame side positioning hole 30 Stay side mounting hole 32 Car body frame side mounting hole 34 Second fastening member P1, P2 Fastening point Ca, Cb Gap

Claims (11)

In the mounting structure of the bumper support member for attaching the bumper support member to the vehicle body frame via the stay,
The body frame is provided with a stay attaching portion for attaching the stay,
The bumper support member mounting structure, wherein a rigidity of the stay in the vehicle front-rear direction and a rigidity of the stay mounting portion in the vehicle front-rear direction are lower than a rigidity of the body frame in the vehicle front-rear direction.   The bumper support member mounting structure according to claim 1, wherein the rigidity of the stay in the vehicle longitudinal direction is lower than the rigidity of the stay mounting portion in the vehicle longitudinal direction.   3. The vehicle body frame according to claim 1, wherein the vehicle body frame has a stopper portion that is at least partially overlapped with the stay when viewed from the front-rear direction of the vehicle and is provided at a position closer to the passenger compartment than the stay mounting portion. Bumper support member mounting structure. The stay mounting portion is provided with a stay positioning hole penetrating in the vehicle vertical direction,
The stay is provided with a stay attachment hole that has a larger opening area in the vehicle longitudinal direction than the stay positioning hole and penetrates in the vehicle vertical direction.
The stay mounting portion and the stay are first fastened through the stay positioning hole and the stay mounting hole in the vehicle vertical direction with the stay positioning hole and the stay mounting hole being overlapped when viewed from the vehicle vertical direction. Fastened by members,
4. The gap according to claim 1, wherein a gap is formed between the stay positioning hole and the stay mounting hole on the bumper support member side when viewed from the vehicle vertical direction. 5. The mounting structure of the described bumper support member. A plurality of the stay positioning holes are provided,
The bumper support member mounting structure according to claim 4, wherein at least two of the stay positioning holes are offset from each other in the vehicle longitudinal direction and the vehicle width direction. The stay mounting portion is formed integrally with the vehicle body frame and has a closed cross section that forms a hollow closed cross section when viewed from the vehicle front-rear direction.
The bumper support member mounting structure according to any one of claims 1 to 5, wherein the stay is inserted into the closed cross section. The stay mounting portion is formed integrally with the body frame and has an open cross-sectional portion provided with an opening in at least a part when viewed from the vehicle front-rear direction.
The bumper support member mounting structure according to any one of claims 1 to 5, wherein the stay is inserted into the open cross section.   The bumper support member mounting structure according to claim 7, further comprising a closing member that closes the opening. The vehicle body frame is provided with a vehicle body frame side positioning hole that opens to the closing member side,
A vehicle body frame side mounting hole penetrating in the vehicle width direction is provided in the closing member,
The vehicle body frame and the closing member have the vehicle body frame side positioning hole and the vehicle body frame side mounting hole connected to the vehicle width in a state where the vehicle body frame side positioning hole and the vehicle body frame side mounting hole are overlapped when viewed from the vehicle width direction. 9. The bumper supporting member mounting structure according to claim 8, wherein the mounting structure is fastened by a second fastening member penetrating in a direction. The closure member is provided with a stay side mounting hole penetrating in the vehicle vertical direction,
The stay and the closing member pass through the stay mounting hole and the stay side mounting hole in the vehicle vertical direction in a state where the stay mounting hole and the stay side mounting hole are overlapped when viewed from the vehicle vertical direction. The bumper support member mounting structure according to claim 8 or 9, wherein the mounting structure is fastened by a fastening member. The vehicle body frame includes a vehicle body main body portion, and a subframe portion supported on the vehicle vertical direction lower side of the vehicle body main body portion,
The bumper support member mounting structure according to any one of claims 1 to 10, wherein the stay mounting portion is provided in the sub-frame portion.

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