WO2015072405A1

WO2015072405A1 - Vehicle body structure

Info

Publication number: WO2015072405A1
Application number: PCT/JP2014/079565
Authority: WO
Inventors: 裕紀古城; 千尋櫻田
Original assignee: 本田技研工業株式会社
Priority date: 2013-11-14
Filing date: 2014-11-07
Publication date: 2015-05-21

Abstract

A vehicle body structure is provided with an on-floor cross member (12) which extends in the vehicle width direction on the top of the rear side of a floor panel. The on-floor cross member (12) has an upward-protruding L shape in cross-section, and forms a triangular shape with the floor panel in cross-section.

Description

Body structure

The present invention relates to a vehicle body structure provided with a cross member on the rear side of a floor panel of a passenger compartment.
Priority is claimed on Japanese Patent Application No. 2013-235903, filed Nov. 14, 2013, the content of which is incorporated herein by reference.

Conventionally, in order to increase the rigidity and strength of the vehicle body, there is known a vehicle body structure provided with a reinforcing member extending along the vehicle width direction between the passenger compartment and the load storage portion behind the passenger compartment of the vehicle For example, refer to Patent Document 1).

Japanese Patent Application Laid-Open No. 11-198857

If such reinforcing members are provided in the vehicle body to ensure sufficient rigidity and strength of the vehicle body, reinforcing members with appropriate rigidity and strength are required. The reinforcing member is formed of a tubular member or the like having a rectangular cross-sectional shape. However, in order to secure the rigidity and the strength of the reinforcing member, the reinforcing member tends to be upsized. Therefore, the reinforcing member may interfere with the constituent members or parts of the vehicle body, and the reinforcing member may not be installed in the vehicle body due to a layout problem.

Then, the aspect of this invention aims at providing the vehicle body structure which can improve the rigidity and strength of a vehicle body by installing the cross member (reinforcement member) on a floor.

The vehicle body structure according to the present invention adopts the following configuration.
(1) A vehicle body structure according to one aspect of the present invention includes an on-floor cross member extending along the vehicle width direction at an upper portion on the rear side of a floor panel of a passenger compartment, and the on-floor cross member protrudes upward in cross section The cross-sectional shape formed with the floor panel is triangular.

As described above, the floor cross member is formed in an L shape in which the cross sectional shape protrudes upward, and the cross floor shape formed by the floor cross member together with the floor panel is a triangle having a corner at the upper side, A ridgeline corresponding to this corner is formed at the top of the floor cross member. Therefore, the rigidity and strength of the on-floor cross member can be increased.
Further, the cross-member on the floor can have a smaller number of corner portions and a smaller shape as compared to the case where the cross-sectional shape is constituted by a tubular member having a rectangular shape as in the prior art. Therefore, it can be installed corresponding to various layouts of the vehicle without interfering with the constituent members and parts of the vehicle body, and the rigidity and strength of the vehicle body can be enhanced.

(2) In the aspect of the above (1), the floor cross member includes a pair of plate members arranged at predetermined intervals in the vehicle width direction, and an inner side of the pair of plate members in the vehicle width direction. You may have the connection member which connects edge parts.

With such a configuration, when arranging a member such as a harness at the top of the floor panel so as to extend to the front and back of the floor cross member, connection is made between the pair of plate members while passing through the member such as a harness The floor cross member is installed by connecting the pair of plate members with each other. Therefore, the cross member on the floor can be installed without any problem in the layout of the members and the like.

(3) In the above aspect (2), a rear seat attachment member for attaching a rear seat provided in the passenger compartment is fixed to the floor cross member, and the rear seat attachment member fixed to the floor cross member is fixed. The part may be fastened and fixed to the plate member and the connecting member in a state of being sandwiched between the plate member and the connecting member.
With such a configuration, the rear seat attachment member can be securely fixed to the floor cross member, and the rear seat can be firmly fixed to the vehicle body.

(4) In the aspect according to any one of the above (1) to (3), an underfloor cross member extending along the vehicle width direction is provided at a lower portion on the rear side of the floor panel of the passenger compartment; May be welded to the floor cross member via the floor panel.
With such a configuration, the rigidity and strength of the vehicle body can be enhanced by the on-floor cross member and the under-floor cross member welded through the floor panel.

(5) In the aspect of the above (4), the load storage portion is provided at the rear of the passenger compartment, and the floor cross member on the floor and the under floor cross member are provided at the front end of the floor panel of the load storage portion. And a junction flange disposed at a position overlapping with a rear end of each floor panel of the passenger compartment and joined to the floor panel of the passenger compartment, the junction flange being the floor cross member The notch may be formed in the position corresponding to a welding part with the under floor cross member.

With such a configuration, the four members of the on-floor cross member, the under-floor cross member, the floor panel of the passenger compartment, and the joining flange of the floor panel of the load storage portion are joined in an overlapping manner. However, in the portion where the on-floor cross member and the under-floor cross member are welded, only three members overlap because the cutaway portion is formed in the joint flange of the floor panel of the load storage portion.
Therefore, as compared with the case where four members are overlapped and welded, only when the three members are overlapped and welded, the on-floor cross member and the under-floor cross member are reliably welded because welding is performed reliably. The rigidity and strength of the vehicle body can be reliably enhanced.

(6) In the aspect according to any one of (1) to (5), a child seat attachment member for attaching a child seat is fixed to the floor cross member, and the child seat attachment member is provided from the vehicle width direction It may be formed in a straight line, and may be fixed to the upper surface so as to be parallel to the upper surface of the rear side of the floor cross member.

When a load acts on the child seat due to a collision or the like, this load acts on the floor cross member via the child seat attachment member. Therefore, in the aspect of the present invention, the child seat attachment member is formed in a straight line as viewed from the vehicle width direction, and is fixed to the upper surface so as to be substantially parallel to the upper surface on the rear side of the floor cross member. . Thereby, since the load acts linearly on the floor cross member along the upper surface on the rear side, the child seat attachment member is reliably maintained in the state fixed to the floor cross member even if a large load is applied. be able to.

According to the aspect of the present invention, the floor cross member is formed in a substantially L shape in which the cross sectional shape protrudes upward, and the cross sectional shape formed by the floor cross member together with the floor panel is substantially triangular with a corner at the upper side Due to the shape, a ridge line corresponding to this corner is formed on the floor cross member. Therefore, the rigidity and strength of the on-floor cross member can be increased.
Further, the cross member on the floor can have a smaller number of corner portions and a smaller shape as compared with the case where the cross-sectional shape is constituted by a tubular member having a rectangular shape as in the prior art. Therefore, the on-floor cross member does not interfere with the components and parts of the vehicle body, and the on-floor cross member can be installed corresponding to various layouts of the vehicle, and the rigidity and strength of the vehicle body can be enhanced.

It is a figure showing an example of the vehicle body structure by the embodiment of the present invention. FIG. 2 is a cross-sectional view taken along the line AA of FIG. It is a figure explaining a rear seat attachment member. It is a figure explaining a seat belt anchor attachment part. It is a figure explaining a child safety seat attachment member.

Hereinafter, a vehicle body structure according to an embodiment of the present invention will be described based on FIGS. 1 to 5.
In the drawings, the arrow FR points to the front of the vehicle 1, the arrow UP points to the upper side of the vehicle 1, and the arrow LH points to the left of the vehicle 1.

FIG. 1 shows a vehicle body structure between a passenger compartment 2 and a load storage unit 3 such as a trunk room behind the passenger compartment 2. Rear side frames 4 (side frames) extending substantially along the longitudinal direction of the vehicle and a rear wheel house 5 covering an upper side outside of a rear wheel (not shown) are disposed on the left and right sides of the rear portion of the vehicle 1. The rear side frame 4 is formed in a substantially rectangular shape in cross section, and the rear wheel house 5 bulges inward in the vehicle width direction at an upper portion of the rear side frame 4 on the outer side in the vehicle width direction. The lower end of the rear wheel house 5 is joined to the adjacent rear side frame 4.

A cabin floor panel (floor panel) 6 of the passenger compartment 2 is laid between the front edges of the left and right rear side frames 4, and between the regions on the rear side of the front edges of the left and right rear side frames 4. The loading room floor panel 7 (floor panel) of the load storage unit 3 is laid. A partition 8 is provided between the passenger compartment 2 and the load storage part 3, and a seatback of a rear seat (not shown) is arranged at a position forward of the partition 8 in the passenger compartment 2. .

The partition portion 8 includes a pair of left and right vertical frames (pillar members) 9, a gusset plate 10, and an upper frame (not shown). The pair of left and right vertical frames 9 extend substantially in the vertical direction on the upper side of the left and right rear side frames 4, and the vehicle width direction outer portions of the pair of left and right vertical frames 9 are welded to the corresponding rear wheel house 5 It is fixed. The gusset plate 10 connects the lower end of the vertical frame 9 to the rear side frame. The upper frame extends substantially along the vehicle width direction to connect the upper ends of the left and right vertical frames 9.

In the present embodiment, each of the left and right vertical frames 9 extends obliquely obliquely rearward from the lower end toward the upper side. The lower ends of the left and right vertical frames 9 have heights which do not reach the upper surfaces of the corresponding left and right rear side frames 4 and are separated from the upper surfaces of the corresponding rear side frames 4 by a predetermined distance.

The gusset plate 10 is bolted to the upper surfaces of the left and right rear side frames 4 and the lower edge of the vertical frame 9 to connect the left and right rear side frames 4 and the vertical frame 9.
In the gusset plate 10, a U-shaped cross section substantially similar to the cross section of the lower end of the vertical frame 9 expands downward from the upper end of the gusset plate 10 downward, and the enlarged lower end corresponds to the rear side frame It is designed to abut on the upper surface of 4.

The left and right rear side frames 4 are similarly connected by an underfloor cross member 11, an on floor cross member 12, and a reinforcing rod 13 which extend substantially along the vehicle width direction. The under floor cross member 11 and the above floor cross member 12 are disposed to face each other at the upper and lower sides of the guest room floor panel 6 (see FIG. 2) and connected to the rear side frame 4 respectively. And are integrally joined by spot welding.

The reinforcing rod 13 is formed of a cylindrical member having a substantially circular cross section in a vertical plane including the longitudinal direction of the vehicle. Both end portions 13a of the reinforcing rod 13 in the vehicle width direction are crushed so as to have a flat shape, are overlapped with the rear edge 12a of the floor cross member 12, and are bolted (jointly tightened) to the rear side frame 4 ing.
In the present embodiment, the underfloor cross member 11, the on-floor cross member 12, and the reinforcing rod 13 constitute a part of the lower region of the partition wall portion 8.

As shown in FIGS. 1 and 2, the floor cross member 12 includes a pair of plate members 14 and a connection member 15. One end of the plate member 14 is coupled to the upper wall 4 a of each of the left and right rear side frames 4. The connecting member 15 connects end portions of the pair of plate members 14 on the inner side in the vehicle width direction. The pair of plate members 14 are arranged to have a predetermined distance d in the vehicle width direction.

The plate member 14 is formed in a substantially L-shaped cross section projecting upward in the vertical plane including the longitudinal direction of the vehicle at intermediate portions excluding both end portions in the vehicle width direction, respectively, from a substantially central portion in the longitudinal direction of the vehicle The front side is also formed with an inclined surface which becomes gradually higher from the front side to the rear side. Further, on the rear side of the substantially central portion in the longitudinal direction of the vehicle, an inclined surface which is gradually lowered from the front side to the rear side is formed, and a ridgeline 16 extending substantially along the vehicle width direction is formed in the substantially central portion in the longitudinal direction of the vehicle. Is formed.

The plate member 14 having such a shape is formed such that the cross-sectional shape formed with the passenger compartment floor panel 6 is substantially triangular.

Bonding flanges

14a, 14b and 14c are formed on the outer edge of the plate member 14. A bonding flange 14 a at an end of the plate member 14 on the outer side in the vehicle width direction is formed in a shape substantially along the upper surface of the rear side frame 4 and is welded and fixed to the upper surface of the rear side frame 4. The bonding flange 14 b at the front end of the plate member 14 and the bonding flange 14 c at the rear end of the plate member 14 are formed substantially along the upper surface of the passenger compartment floor panel 6. The joining flange 14b and the joining flange 14c are joined to the joining flange 11b at the front end of the underfloor cross member 11 via the passenger floor panel 6 and the joining flange 11c (described later) at the rear end of the underfloor cross member 11. It is welded. Further, a joint flange 14 d at an end of the plate member 14 at the outer side in the vehicle width direction is formed in a shape substantially along the upper surface of the passenger compartment floor panel 6 and is welded to the passenger compartment floor panel 6.
Here, a portion constituting an inclined surface on the front side of the ridgeline 16 of the plate member 14 will be described as a front inclined portion 14A, and a portion constituting an inclined surface on the rear side of the ridgeline 16 will be described as a rear inclined portion 14B.

The connecting member 15 connects the vicinity of the end portion on the inner side in the vehicle width direction of the pair of plate members 14 from above the pair of plate members 14.
Further, the connecting member 15 is vertically separated from the passenger compartment floor panel 6 at least at a portion corresponding to the distance d on the inner side in the vehicle width direction of the pair of plate members 14. Below the connecting member 15, a space 17 surrounded by the connecting member 15, the inner end of the pair of plate members 14 in the vehicle width direction, and the passenger compartment floor panel 6 is formed. The space 17 allows the passenger compartment 2 side of the on-floor cross member 12 to communicate with the load storage portion 3 side.
Therefore, the space 17 can be used as a place through which a member such as a harness passes between the passenger compartment 2 side and the load storage portion 3 side.

Further, a rear seat attaching member 18 for attaching a rear seat of the passenger compartment 2 is fixed to one plate member 14 of the pair of plate members 14.
As shown in FIG. 3, the rear seat attachment member 18 has a rear seat connection portion 18 a and a joint flange (fixing portion) 18 b. The rear seat connecting portion 18 a is provided so as to protrude substantially upward from one plate member 14, and the rear seat is attached. The joint flange 18b is provided continuously to the lower end portion of the rear seat connection portion 18a.
The bonding flange 18 b is formed in a shape substantially along the upper surface of one plate member 14.
The rear seat attachment member 18 is disposed adjacent to the connection member 15 such that the connection member 15 overlaps at least a part of the joint flange 18 b. And, at least a part of the joint flange 18 b is bolted in a state of being sandwiched between the plate member 14 and the connection member 15.

Further, as shown in FIG. 4, seat belt anchor attachment portions 20 to which the seat belt anchors 19 are attached are formed on the front inclined portions 14 </ b> A of the pair of plate members 14. The seat belt anchor mounting portion 20 is formed in a concave shape, and the seat belt anchor 19 is configured to be fittable.

Further, as shown in FIGS. 4 and 5, a child seat attachment member 21 for attaching a child seat (not shown) is fixed to the upper surface of the rear inclined portion 14B in each of the pair of plate members 14.
The child seat attaching member 21 is a member obtained by bending a steel rod or the like into a substantially U shape, and is formed so as to have a substantially U shape in a front view and a substantially linear shape in a side view.

The child seat attaching member 21 fixed to the plate member 14 has a substantially U shape whose lower side is opened as viewed from the direction orthogonal to the upper surface of the rear inclined portion 14B of the plate member 14 and viewed from the vehicle width direction. It is fixed in such a direction that it becomes a straight line substantially parallel to the upper surface of the rear side inclined portion 14B of the plate member 14. Further, the vicinity of the upper end portion of the child seat attachment member 21 protrudes upward beyond the ridgeline 16 formed on the plate member 14, and the child seat is engaged with the protruding portion.
In the present embodiment, the rear inclined portion 14B of the plate member 14 is formed with a recess in which a part of the child seat attachment member 21 can be fitted, so that the child seat attachment member 21 can be easily positioned with respect to the plate member 14. It is possible to

Returning to FIG. 2, the underfloor cross member 11 is formed in a hat-shaped cross-sectional shape facing upward, and at the outer edge portion,

joint flanges

11a, 11b, and 11c are formed. The joint flanges 11 a at both ends in the vehicle width direction of the underfloor cross member 11 are formed in a shape substantially along the upper surface of the rear side frame 4, and are welded and fixed to the upper surface of the rear side frame 4. The joint flange 11 b at the front end of the underfloor cross member 11 and the joint flange 11 c at the rear end of the under floor cross member 11 are formed substantially along the lower surface of the passenger compartment floor panel 6. The joint flange 11b and the joint flange 11c are provided with a joint flange 14b at the front end of the plate member 14 and a joint flange 14c at the rear end of the plate member 14 which the floor cross member 12 has via the cabin floor panel 6. Each is spot welded.

Here, as shown in FIG. 1 to FIG. 3, the joint flange 11 c on the rear end side of the underfloor cross member 11, the joint flange 14 c on the rear end side of the plate member 14 on the floor cross member 12, and the rear end of the passenger floor panel 6 The joint flange 6c on the side and the joint flange 7a on the front end side of the luggage compartment floor panel 7 are configured to be arranged to overlap each other. And in the joining flange 7a of the front end side of the cargo room floor panel 7, the notch 7b is in the position corresponding to the position where the joining flange 11c of the underfloor cross member 11 and the joining flange 14c of the plate member 14 are spot welded. Is formed. Thereby, there is no joining flange 7a of the luggage compartment floor panel 7 at the position where the joining flange 11c of the underfloor cross member 11 and the joining flange 14c of the plate member 14 are spot welded, and only the joining flange 6c of the passenger compartment floor panel 6 Is intervened.

At the rear of the joint flange 14c on the rear end side of each plate member 14, the joint flange 11c on the rear end side of the underfloor cross member 11, the joint flange 6c on the rear end side of the passenger compartment floor panel 6, and the luggage compartment floor panel The joint flange 7a on the front end side of 7 is configured to vertically overlap, and these three members are also spot-welded.

Next, the operation and effects of the vehicle body structure according to the present embodiment described above will be described.
In the vehicle body structure according to the present embodiment, the pair of plate members 14 of the on-floor cross member 12 is formed in a substantially L shape in which the cross sectional shape protrudes upward, and the cross sectional shape formed by the plate member 14 together with the passenger floor panel 6 Is a substantially triangular shape having a corner on the upper side. As a result, since ridge lines 16 corresponding to the corners are formed at the top of the plate member 14, the rigidity and strength of the floor cross member 12 can be enhanced.
The on-floor cross member 12 can have a smaller number of corner portions and a smaller shape as compared to the case where the cross-sectional shape is configured by a tubular member having a rectangular shape as in the related art. Therefore, it can be installed corresponding to various layouts of the vehicle 1 without interfering with the constituent members and parts of the vehicle body, and the rigidity and strength of the vehicle body can be enhanced.

Further, the floor cross member 12 has a pair of plate members 14 arranged at predetermined intervals in the vehicle width direction, and a connecting member 15. Thereby, when arranging members, such as a harness, in the upper part of the passenger compartment floor panel 6 so as to extend to the front and back of the floor cross member 12, the members, such as a harness, pass through the space 17 between the pair of plate members 14; When the pair of plate members 14 are connected by the connecting member 15, the on-floor cross member 12 is installed, so the on-floor cross member 12 can be installed without any problem in the layout of the members and the like.

Further, the rear seat attaching member 18 is fastened and fixed in a state where a part of the joint flange 18 b fixed to the floor cross member 12 is sandwiched between the plate member 14 and the connecting member 15. Thus, the rear seat attachment member 18 can be securely fixed to the floor cross member 12, and the rear seat can be firmly fixed to the vehicle body via the rear seat attachment member 18.

Further, the underfloor cross member 11 and the plate member 14 of the above floor cross member 12 are welded via the cabin floor panel 6. As a result, these members can be securely connected to increase the rigidity and strength of the vehicle body.

Also, the four members of the joint flange 11c of the underfloor cross member 11, the joint flange 14c of the plate member 14 in the floor upper cross member 12, the joint flange 6c of the passenger floor panel 6 and the joint flange 7a of the loading space floor panel 7 overlap. It is joined. However, in the portion where the joining flange 11c of the underfloor cross member 11 and the joining flange 14c of the plate member 14 are welded, the notch 7b is formed in the joining flange 7a of the luggage compartment floor panel 7, so three members Only overlap.
Compared to the case where four members are overlapped and welded, welding is performed more reliably if only three members are overlapped, so the on-floor cross member 12 and the on-floor cross member 11 are securely welded, The rigidity and strength of the vehicle body can be reliably enhanced.

Further, the child seat attachment member 21 fixed to the floor cross member 12 is formed in a straight line as viewed from the vehicle width direction, and along the upper surface of the rear inclined portion 14B of the plate member 14 of the floor cross member 12. It is fixed. As a result, the load acts linearly on the floor cross member 12 along the upper surface of the rear inclined portion 14B, so the child seat mounting member 21 is fixed to the floor cross member 12 even if a large load acts. It can be maintained reliably.

As mentioned above, although embodiment of the vehicle body structure by this invention was described, this invention is not limited to said embodiment, It can change suitably in the range which does not deviate from the meaning.
For example, in the above embodiment, the floor cross member 12 is configured to have the pair of plate members 14 and the connecting member 15 that connects the pair of plate members 14 with each other, but other configurations may be used.
In the above embodiment, the rear seat attachment member 18 is fixed in such a manner that a part of the joint flange 18b is sandwiched between the plate member 14 and the connection member 15. However, the rear seat attachment member 18 is fixed by other fixing method. It may be done. In addition, the rear seat attachment member 18 may not be provided.

Further, in the above embodiment, the welding flange 14c of the plate member 14 of the on-floor cross member 12 and the welding flange 11c of the under-floor cross member 11 are spot-welded via the welding flange 6c of the cabin floor panel 6, A notch 7 b is formed in the joint flange 7 a of the luggage compartment floor panel 7 corresponding to the position of welding. However, if the on-floor cross member 12 and the on-floor cross member 11 are securely joined, the notch 7 b may not be formed. Further, the joining flange 14c of the plate member 14 of the on-floor cross member 12 and the joining flange 11c of the below-floor cross member 11 may be joined by a joining method other than spot welding.
Moreover, in the above-mentioned embodiment, although the child seat attachment member 21 is provided, it does not need to be provided. Further, the shape of the child seat attachment member 21 may be other than the above-described shape, and the attachment method of the child seat attachment member 21 to the plate member 14 may be other than the attachment method described above.

1 vehicle 2 passenger compartment 3 load storage part 4 rear side frame (side frame)
5 Rear wheel house 6 Guest room floor panel 7 Packing floor panel 7a Joint flange 7b Notched part 8 Partition part 9 Vertical frame 10 Gusset plate 11 Underfloor cross member 12 Floor cross member 14 Plate member 15 Connection member 18 Rear seat attachment member 18b Joint flange (Fixed part)
20 seat belt anchor mounting portion 21 child seat mounting member

Claims

An upper floor cross member extending along the vehicle width direction is provided at the top of the rear side of the floor panel of the passenger compartment,
The on-the-floor cross member is formed in an L-shape in which the cross-sectional shape protrudes upward, and the cross-sectional shape formed with the floor panel is a triangular shape.
The on-the-floor cross member has a pair of plate members arranged at predetermined intervals in the vehicle width direction, and a connecting member for connecting the inward ends of the pair of plate members in the vehicle width direction. A vehicle body structure according to claim 1, characterized in that.
A rear seat attachment member for attaching a rear seat provided in the passenger compartment is fixed to the floor cross member.
The fixing portion of the rear seat attaching member fixed to the floor cross member is fastened and fixed to the plate member and the connecting member in a state of being sandwiched between the plate member and the connecting member. The vehicle body structure according to claim 2.
An underfloor cross member extending along the vehicle width direction at a lower portion on the rear side of a floor panel of the passenger compartment;
The vehicle body structure according to claim 1, wherein the underfloor cross member is welded to the above floor cross member via the floor panel.
An underfloor cross member extending along the vehicle width direction at a lower portion on the rear side of a floor panel of the passenger compartment;
The vehicle body structure according to claim 2, wherein the underfloor cross member is welded to the above floor cross member through the floor panel.
An underfloor cross member extending along the vehicle width direction at a lower portion on the rear side of a floor panel of the passenger compartment;
The vehicle body structure according to claim 3, wherein the underfloor cross member is welded to the above floor cross member via the floor panel.
A load storage portion is provided at the rear of the passenger compartment, and the front end of the floor panel of the load storage portion includes the floor cross member, the floor cross member, and the floor panel of the passenger compartment. A joining flange is provided at a position overlapping the rear end and joined to the floor panel of the passenger compartment,
5. The vehicle body structure according to claim 4, wherein the joint flange is formed with a notch at a position corresponding to a welding portion between the floor upper cross member and the floor lower cross member.
A load storage portion is provided at the rear of the passenger compartment, and the front end of the floor panel of the load storage portion includes the floor cross member, the floor cross member, and the floor panel of the passenger compartment. A joining flange is provided at a position overlapping the rear end and joined to the floor panel of the passenger compartment,
The vehicle body structure according to claim 5, wherein the joining flange is formed with a notch at a position corresponding to a welded portion of the floor upper cross member and the floor lower cross member.
A load storage portion is provided at the rear of the passenger compartment, and the front end of the floor panel of the load storage portion includes the floor cross member, the floor cross member, and the floor panel of the passenger compartment. A joining flange is provided at a position overlapping the rear end and joined to the floor panel of the passenger compartment,
The vehicle body structure according to claim 6, wherein the joining flange is formed with a notch at a position corresponding to a welding portion of the floor upper cross member and the floor lower cross member.
A child seat attachment member for attaching a child seat is fixed to the floor cross member,
The child seat attachment member is formed in a straight line when viewed from the vehicle width direction, and is fixed to the upper surface so as to be parallel to the upper surface of the rear side of the floor cross member. The vehicle body structure according to any one of Items 1 to 9.