JP5581297B2 - Hull rear - Google Patents

Description

  The present invention relates to a partition wall that separates a vehicle compartment from a rear cargo compartment, and a vehicle body rear portion in which a fuel container is disposed in the rear cargo compartment.

In the rear part of the vehicle body, there is one in which a fuel container, for example, a fuel cylinder is arranged in a rear loading chamber.
In the rear part of the vehicle body in which the fuel cylinder is disposed, the fuel cylinder is mounted on a dedicated fixing base and integrated, and then incorporated into the rear luggage compartment and disposed in the vicinity of the seat back of the rear seat (see, for example, Patent Document 1). .
In addition, there is a panel (bulk head) that partitions the vehicle compartment and the rear cargo compartment in the vicinity of the seat back of the rear seat, and an opening that communicates with the vehicle compartment. And the intensity | strength of the vehicle body rear part is raised by attaching the reinforcement bar formed in X shape to the opening part (for example, refer patent document 2).

  However, in the prior art (Patent Document 1), in the case of a small vehicle having a short front and rear length of the rear loading chamber, it is occupied by the fuel cylinder, and the volume of the rear loading chamber is reduced. If the fuel cylinder is moved further forward, it interferes with the partition wall. In order to avoid interference, if the partition wall is cut out or an opening (opening) is opened in the partition wall, the strength of the rear part of the vehicle body is reduced.

  Further, in Patent Document 1, a fuel cylinder is mounted on a dedicated fixing base (container holding mechanism) and integrated, and then incorporated into a rear cargo chamber. If the fuel cylinder is mounted on a dedicated fixed base and integrated, the integrated object becomes large and interferes with the vehicle body when it is incorporated into the rear cargo compartment of a small vehicle, so that it cannot be mounted on the small vehicle.

  In Patent Document 2, when a load is input from the rear wheel to the floor (floor panel) of the vehicle body, the load is transmitted from the lower end of the X-shaped reinforcing bar to the upper part of the panel through the upper part of the reinforcing bar. The load cannot be distributed to the bottom, making it difficult to increase the panel strength. As a result, the strength of the rear part of the vehicle body may be reduced. A structure that further increases the strength of the panel (bulkhead) has been desired.

Japanese Patent No. 3474359 JP 2008-230518 A

  According to the present invention, the container holding mechanism for fixing the fuel container can be reduced in size, and even if a fuel cylinder is placed in the rear loading chamber, a decrease in the volume of the rear loading chamber is suppressed, while an opening is provided in the bulkhead. Another object of the present invention is to provide a rear part of the vehicle body that complements the strength of the bulkhead and ensures the strength of the rear part of the vehicle body.

In order to solve the above-mentioned problems, the invention according to claim 1 includes a bulkhead joined to the left and right rear side walls of the vehicle body so as to partition the vehicle compartment and the rear cargo compartment, and a fuel container is provided on the rear floor of the vehicle body. In the rear part of the vehicle body provided with a container holding mechanism for holding the bulkhead, the bulkhead has an opening in the center, and the left and right vertical frames are placed on the left and right rear side frames on the rear floor, and are placed in front of the left and right vertical frames. And the left and right sides of the bulkhead are connected by a horizontal bar , and the front ends of the left and right vertical frames extend forward from the opening of the bulkhead, and are installed on the front ends of the left and right vertical frames and the front of the bulkhead. the left and right base brackets linked by a transverse bar constitutes the container holding mechanism, and the fuel container to be retained in the container holding Organization is partially disposed forward of the opening of the bulkhead, the bulk An X-shaped reinforcing bar is provided on the lid, the upper ends of the left and right bars of the X-shaped reinforcing bar are fastened to the bulkhead, and the lower ends of the left and right bars of the X-shaped reinforcing bar are fastened to the front end of the vertical frame of the container holding mechanism, The lower end of a U-shaped reinforcing member having a U-shaped portion in plan view of the vehicle is coupled to the front end of the vertical frame, and the remaining portion of the U-shaped reinforcing member is fastened to the bulkhead. To do.

In the invention according to claim 2 , the vertical frame is formed of square pipes, U-shaped brackets are fitted outwardly from the front ends of the left and right vertical frames, and the openings are fitted upward, respectively. The bracket is fastened to the left and right U-shaped brackets with the bottom ends of the X-shaped reinforcing bars overlapped, and the front end of the vertical frame is fastened to the left and right rear side frames. It is characterized by being fastened by fastening a collar penetrating the end up and down.

In the invention according to claim 1, put the vertical frame of the container holding mechanism to the rear side frame of the rear floor, placing a portion of the fuel container held in the container holding mechanism in front of the bulkhead, the bulkhead The horizontal bar of the container holding mechanism was extended to the left and right, and both ends were fixed with base brackets . Since a part of the fuel container is arranged in front of the bulkhead, the bulkhead has a larger opening area in the center and the remaining part is thinner (distance from the rear side wall). By fixing in the vicinity of the opening of the bulkhead, the strength of the bulkhead can be supplemented, and as a result, the strength of the rear portion of the vehicle body can be increased.

Particularly in the present invention, the X-shaped reinforcing bar provided bulkhead, signed a bar upper end of the right and left X-shaped reinforcing bar bulkhead, vertical front frame of the container holding mechanism bar lower end of the right and left X-shaped reinforcing bar The load input to the bulkhead can be transmitted from the upper part of one (left) of the bulkhead to the lower part of the other (right), for example, by the X-shaped reinforcing bar. It can be complemented more.

In the present invention, the lower end of the U-shaped reinforcing member having a U-shaped portion in a plan view of the vehicle is coupled to the front end of the vertical frame, and the remaining portion of the U-shaped reinforcing member is fastened to the bulkhead. Therefore, the lower part of the bulkhead is overlapped, and the load can be reliably distributed to the vertically placed frame, so that the strength of the bulkhead can be increased.

In the invention according to claim 2 , the vertical frame is formed of a square pipe, U-shaped brackets are fitted outwardly from the front ends of the left and right vertical frames, and the openings are respectively fitted upward, and the left and right rear side frames are fitted with left and right U-shaped frames. The bracket is fastened to the left and right U-shaped brackets with the bottom ends of the X-shaped reinforcing bars overlapped, and the front end of the vertical frame is fastened to the left and right rear side frames. Since it is fastened by fastening a collar that penetrates the end up and down, it can prevent interference of the X-shaped reinforcing bar with the fuel container and distribute the load to the rear side frame, complement the bulkhead strength and forward of the bulkhead The fuel container can be arranged at the same time.

It is a perspective view which shows the state which mounted the fuel container in the vehicle body rear part which concerns on the Example of this invention. It is a top view which shows the state which has arrange | positioned the container holding mechanism in the vehicle body rear part. It is an exploded view and assembly point explanatory drawing of a container holding mechanism. It is sectional drawing of a vehicle body rear part and a fuel container. It is a perspective view which shows the state which has arrange | positioned the container holding mechanism in the vehicle body rear part which concerns on an Example. FIG. 6 is a detailed view of part 6 of FIG. 5. FIG. 7 is a view taken in the direction of arrow 7 in FIG. 6. FIG. 8 is a detailed view of 8 part of FIG. 4. FIG. 4 is an explanatory diagram of a procedure for assembling the container holding mechanism following FIG. 3. FIG. 10 is an explanatory diagram of an assembly procedure following FIG. 9.

  Hereinafter, embodiments of the present invention will be described in detail with reference to examples.

As shown in FIGS. 1 and 2, the vehicle 11 employs a vehicle body rear portion 13 according to the embodiment as a vehicle body 12.
The vehicle body rear portion 13 includes a rear floor portion 15, left and right rear side walls (rear side bodies) 16, a bulkhead 17, and a container holding mechanism 18. A fuel container 21 (a pressure container such as a fuel cylinder) is fixed to the container holding mechanism 18. A spare tire 22 is disposed below the container holding mechanism 18 so as to be carried out and carried in freely.

The rear floor portion 15 is provided with left and right rear side frames 23 and 24 extending in the vehicle longitudinal direction (X-axis direction) on the left and right, and a cross member 25 is provided between the rear side frames 23 and 24. The cross member 25 is also included in the bulkhead 17 as a lower part of the bulkhead 17.
The bulkhead 17 is formed with an opening 27 in the center, and is substantially gate-shaped upward from the rear floor 15 (FIG. 1).

Next, the main structure of the vehicle body rear portion 13 will be described with reference to FIGS.
The vehicle body rear portion 13 includes a bulkhead 17 joined to the left and right rear side walls 16 of the vehicle body 12 so as to partition the vehicle compartment 31 and the rear cargo chamber 32, and a container holding a fuel container 21 on the rear floor portion 15 of the vehicle body 12. A holding mechanism 18 is provided.

  Left and right vertical frames (tank side beams) 34 and 35 of the container holding mechanism 18 are mounted on the left and right rear side frames 23 and 24 of the rear floor 15 so as to extend in the front-rear direction (X-axis direction) and are held by the container holding mechanism 18. The disposed fuel container 21 is disposed at a distance B forward from the bulkhead 17, and a horizontal bar (front horizontal bar) 36 of the container holding mechanism 18 is extended to the left and right (Y-axis direction) on the bulkhead 17. 37 and 38 were fixed with a base bracket 41, respectively.

The bulkhead 17 is provided with X-shaped reinforcing bars 43, X-shaped bar upper end 44 of the left and right reinforcing bar 43 fastened to the bulkhead 17, X-shaped lateral bar bottom 45 of the container holding mechanism of the reinforcing bar 43 Fastened to the front ends 46 of the 18 vertical frames 34, 35.

As shown in FIG. 3, the lower end 48 of the U-shaped reinforcing member 47 having a U-shaped portion in plan view of the vehicle is coupled to the front end 46 of the vertically placed frames 34, 35. The upper portion 51 of the U-shaped reinforcing member 47 is fastened to the bulkhead 17.

  The vertical frames 34 and 35 are formed of square pipes, and U-shaped brackets 53 are fitted outside the front ends 46 of the left and right vertical frames 34 and 35, and the openings 54 (FIGS. 7 and 8) are fitted upward. The left and right U-shaped brackets 53 are attached to the rear side frames 23 and 24 and the lower end 45 of the X-shaped reinforcing bar 43 is overlapped and fastened to the left and right U-shaped brackets 53 to fasten the left and right rear side frames 23 and 24 vertically. The front ends 46 (specifically, the front ends 55) of the placing frames 34 and 35 are fastened, and the collars (rear collars) 57 that vertically penetrate the rear ends 56 of the vertically placing frames 34 and 35 are fastened to the left and right rear side frames 23 and 24. It is concluded by that.

  One end 58 and the other end of the cross member 25 extending from the left and right to the front end 46 and the rear floor 15 of the left and right vertical frames 34 and 35 with the base bracket 41 at both ends 37 and 38 of the horizontal bar (front horizontal bar) 36 59, respectively.

Next, the bulkhead 17 and the container holding mechanism 18 will be described in detail.
The bulkhead 17 has an opening 27 at the center and a width from the vicinity of the left rear side frame 23 to the vicinity of the right rear side frame 24. Moreover, it joins to the right and left rear side walls 16 (including the wheel house 61), and also serves as a gusset (reinforcement) 61a of the wheel house 61. The cross member 25 also serves as a lower frame of the bulkhead 17.

  Further, the bulkhead 17 is viewed from the side of the vehicle 11 (viewpoint in FIG. 4), tilted backward by the vehicle 11 (angle α), and the X-shaped reinforcing bar 43 is attached along this tilt.

  The X-shaped reinforcing bar 43 (FIGS. 5 and 6) is fastened with the center of the second bar 64 intersecting the center of the first bar 63. The bar lower end 45 is fastened to the container holding mechanism 18 so as to be disposed close to the fuel container 21 protruding from the opening 27.

  As shown in FIGS. 3 and 5, the container holding mechanism 18 includes left and right vertical frames 34 and 35, a horizontal bar (front horizontal bar) 36, a rear horizontal bar 66, a base bracket 41, a band, Mechanism 67. The container holding mechanism 18 is substantially symmetrical on the left and right.

Further, the container holding mechanism 18 arranges the front ends 46 a of the front ends 46 of the vertical frames (square pipes) 34 and 35 in front of the bulk head 17, and the vertical frames (square pipes) 34 and 35 of the bulk head 17. The front end 46 is crossed.

  The vertical frames (square pipes) 34 and 35 (FIG. 8), more specifically, by connecting a U-shaped bracket 53 to the square pipe, an L-shaped bracket (front end 55) is projected forward from the square pipe, and the collar ( The lower end surface 71 of the front collar nut 68 is floated from the rear side frames 23 and 24 and joined.

  As shown in FIGS. 3, 6, and 7, the U-shaped bracket 53 forms a front end 55 on one side, the front end 55 forms a fastening portion, and a pipe is connected to the other end integrally connected to the front end (fastening portion) 55. A coupling portion 72 is formed.

Square pipes (vertical frames 34, 35) are fitted to the pipe coupling portion 72 of the U-shaped bracket 53.
A part of the pipe coupling portion 72 is U-shaped and has a first upright piece portion 75 and a second upright piece portion 76.
The fastening portion (front end 55) is L-shaped in a front view of the vehicle, and the lower end of the bar 45 (fastening plate 73 (FIGS. 5 and 6)) is superimposed on the upper surface.
A U-shaped reinforcing member 47 is coupled to the upper part of the square pipe.

  The U-shaped reinforcing member 47 (FIGS. 3 and 7) overlaps with a U-shape that substantially matches the lower portion of the bulkhead 17. The U-shape is formed of a first side 81 facing forward, a second side 82 facing left and right, and a third side 83 facing the first side and facing backward. And the welding flange 84 welded to the vertical frames 34 and 35 was each provided in these lower parts, and the fastening part 85 was each provided in the upper part.

  The welding flange 84 is included in the lower end 48 of the U-shaped reinforcing member 47, and “joining the lower end 48” means that the welding flange 84 is joined in detail.

The welding flange 84 of the U-shaped reinforcing member 47 is joined to the longitudinal frames 34 and 35 in advance by welding at the welded portion before assembling to the bulkhead 17 (FIG. 3). The base bracket 41 overlaps the first side portion 81.
The base bracket 41 is assembled with a horizontal bar (front horizontal bar) 36 that is fixed integrally with a welded portion in advance.

  The horizontal bar (front horizontal bar) 36 uses a steel pipe as the main body, and is provided with front pipe support lugs 87 at both ends 37 and 38 of the main body (steel pipe), in the center in the longitudinal direction of the steel pipe, in other words, in the center in the vehicle width direction. A lower band 88 of the band mechanism 67 is provided. The front pipe support lug 87 is coupled to the base bracket 41 in advance before assembling to the vehicle body 12. A rear horizontal bar 66 is provided substantially parallel to the front horizontal bar 36.

  The rear horizontal bar 66 is a steel pipe, and a lower band 88 of a band mechanism 67 is provided at the center. Further, a container positioning portion 93 is provided between the lower band 88 and the rear pipe support lug 91 for positioning by contacting the left head 92 of the fuel container 21.

  One (front) of the rear pipe support lug 91 is fastened to the rear side frames 23, 24 by through bolts 95 (FIG. 9) via the rear collars 57 at the rear ends of the vertical frames 34, 35. The rear ends of the vertical frames 34 and 35 are fastened to the rear side frames 23 and 24 with the through bolts 95.

  Further, the other (rear) of the rear pipe support lug 91 is fastened to the rear collar nut 96 (FIG. 4) near the rear collar 57 with a through bolt 113. The rear collar nut 96 passes through the square pipe (vertical frames 34 and 35) and is integrally connected to the rear part of the square pipe.

Next, the base bracket 41 will be described (FIGS. 3, 6, and 8).
The base bracket 41 includes a substantially L-shaped three-way connection main body portion 97 and a lower connection main body portion 98 that is continuous with the three-way connection main body portion 97 and extends toward the lower cross member 25.

The three-way connection main body portion 97 is formed with a first connection plate portion 101 that is in contact with the upper end surface of the front collar nut 68 of the vertically placed frames 34 and 35. A second connecting plate portion 102 that is connected to the first connecting plate portion 101 and is fastened on the front wall 17a of the bulkhead 17 so as to overlap the first side portion 81 of the U-shaped reinforcing member 47 with the first side portion 81 interposed therebetween is formed. Has been.
A front pipe support lug 87 is coupled to the center. The lower connection main body portion 98 is obtained by bending the central connection portion and the first connection plate portion 101.

  The lower connection main body portion 98 has an L-shaped cross section, and is formed in a substantially rectangular plate shape with the fastening pressure receiving portion 104 in surface contact with the rear floor portion 15 at the lower end.

Here, as shown in FIG. 3, the container holding mechanism 18 excluding the upper band 106 (FIG. 1) of the band mechanism 67 is referred to as a container holding mechanism subassembly 107.
That is, the lower band 88 is fixed to the horizontal bar (front horizontal bar) 36 and the rear horizontal bar 66 in advance, and the left and right base brackets 41 are fixed to the front horizontal bar 36 to be integrated. This is used as a container holding mechanism subassembly 107.
Further, the container holding mechanism subassembly 107 is prepared, and left and right vertical frames (tank side beams) 34 and 35 in which the U-shaped reinforcing member 47 and the U-shaped bracket 53 are integrally joined are prepared.
The band mechanism 67 includes a lower band 88 and an upper band 106.

  Next, the procedure for assembling the fuel container 21 and the container holding mechanism 18 will be briefly described (FIGS. 3, 9, and 10).

First, as shown in FIG. 3, left and right vertical frames (tank side beams) 34 and 35 are temporarily placed on the upper part (including the floor plate) of the rear side frames 23 and 24 of the rear floor 15.
Then, the U-shaped reinforcing member 47 is fitted to the lower part of the bulkhead 17 (the gusset 61a of the wheel house 61) as indicated by the arrow a1. At that time, the vertically placed frames 34 and 35 fit between the gusset 61a and the rear side frames 23 and 24 (including the floor plate).

Subsequently, the container holding mechanism subassembly 107 is temporarily placed on the left and right vertical frames 34 and 35.
As shown in FIG. 9, through bolts 95 are passed through the rear collars 57 of the vertically placed frames 34 and 35 as indicated by an arrow a3 and inserted into the left and right vertically placed frames 34 and 35 to be temporarily held. At that time, the rear collar 57 is passed through one (front) of the rear pipe support lug 91 of the rear horizontal bar 66.

  Next, the lower connection main body 98 of the base bracket 41 provided on the front horizontal bar 36 is temporarily tightened with a bolt 111 as indicated by an arrow a4.

Subsequently, as shown in FIG. 9, the left base bracket 41 provided on the front horizontal bar 36 is pushed rearward of the vehicle 11 as indicated by an arrow a5, and the second connection plate portion 102 of the three-way connection main body portion 97, The U-shaped reinforcing member 47 (first side portion 81) is overlapped (FIGS. 6 and 8) and fastened to the front wall 17a of the bulkhead 17 with a bolt 112.
Similarly, the right base bracket 41 is pushed rearward of the vehicle 11 and fastened to the front wall 17 a of the bulkhead 17 with a bolt 112.

After the bolt 111 is fastened to the fastening pressure receiving portion 104 and the through bolt 95 is fastened to the rear pipe support lug 91, the other (rear) of the left and right rear pipe support lugs 91 of the rear horizontal bar 66 is fastened by the bolt 113.
Bolts 114 are passed through the front collar nut 68 (FIG. 8) of the vertical frames 34 and 35, the front pipe support lug 87 of the front horizontal bar 36, and the first connection plate portion 101 of the three-way connection main body portion 97 of the base bracket 41. Conclude.

Subsequently, the second side portion 82 of the U-shaped reinforcing member 47 of the vertically placed frames 34 and 35 is fastened to the bulkhead 17 with bolts 115 (see also FIG. 7).
The third side portion 83 of the U-shaped reinforcing member 47 of the vertically placed frames 34 and 35 is fastened to the bulkhead 17 with bolts 116 (FIG. 7). This is done in the same way on the left and right.
By this time, the bolts 112, 114, 115, 116 have been fastened.
Next, the container positioning portion 93 is fastened to the rear horizontal bar 66.

The X-shaped reinforcing bar 43 is assembled (FIG. 10).
First, the bar upper end 44 and the bar lower end 45 (FIG. 6) of the first bar 63 are temporarily tightened with bolts 121 and 122. As shown in FIG. 8, the fastening plate 73 of the bar lower end 45 is placed on the fastening portion (front end 55) of the U-shaped bracket 53 of the vertically placed frames (tank side beams) 34 and 35, and the interior of the rear side frames 23 and 24 is overlapped. The bolt 122 is temporarily fastened to the nut 123 (FIG. 8).

Next, the hole of the second bar 64 is hooked on the central bolt of the first bar 63. That is, it passes through the hole. Subsequently, the upper end 44 and the lower end 45 (fastening plate 73) of the second bar 64 are temporarily tightened with bolts 124 and 125.
The bolts 121, 122, 124, 125 temporarily tightened with the X-shaped reinforcing bar 43 are finally tightened. Finally, the center of the first bar 63 and the second bar 64 is fastened with a nut.
In a subsequent process, the fuel container 21 is placed on the lower band 88 and the upper band 106 is fastened.

Next, the operation of the vehicle body rear portion 13 will be described.
As described above, in the vehicle body rear portion 13, the container holding mechanism 18 can be reduced in size by integrating the X-shaped reinforcing bar 43 included in the bulkhead 17 and the base bracket 41 of the container holding mechanism 18 that holds the fuel container 21. As shown, the fuel container 21 can be disposed in front of the bulkhead 17 while the strength of the bulkhead 17 is secured, and the mounting area of the fuel container 21 can be reduced.

  “The fuel container 21 is disposed in front of the bulkhead 17” means that the fuel container 21 is protruded from the bulkhead 17 by a distance B forward as shown in FIG.

  Since only the fuel container 21 is mounted in a subsequent process, it is sufficient to secure a space for carrying only the fuel container 21, the space can be reduced, and versatility is enhanced. In other words, there is an advantage that the number of vehicles that can be employed increases.

  Further, since the fuel container 21 is arranged in front of the bulkhead 17 at the rear body 13, the area of the central opening 27 becomes larger and the bulkhead 17 becomes thinner (distance from the rear side wall 16). The strength of the bulkhead 17 can be supplemented by fixing the 18 horizontal bars 36 in the vicinity of the opening 27 of the bulkhead 17.

  Further, when a load is input from the rear wheel to the floor (underbody) of the vehicle body 12, the load is applied to the lower portion of the bulkhead 17 by the base bracket 41 and the vertical frames (tank side beams) 34 and 35 of the container holding mechanism 18. In addition, the load can be distributed from the center of the bulkhead 17 (the upper part connected to the gusset 61a of the wheel house 61) to the rear side wall (rear side body) 16. Therefore, the strength of the bulkhead 17 can be increased.

  The rear part of the vehicle body of the present invention is suitable for an automobile equipped with a fuel container (fuel cylinder).

  DESCRIPTION OF SYMBOLS 11 ... Vehicle, 12 ... Vehicle body, 13 ... Vehicle body rear part, 15 ... Rear floor part, 16 ... Rear side wall, 17 ... Bulkhead, 18 ... Container holding mechanism, 21 ... Fuel container, 23 ... Left rear side frame, 24 ... Right Rear side frame, 25 ... cross member, 31 ... vehicle compartment, 32 ... rear cargo compartment, 34 ... left vertical frame, 35 ... right vertical frame, 36 ... horizontal bar (front horizontal bar), 37, 38 ... Both ends of horizontal bar, 41 ... Base bracket, 43 ... X-shaped reinforcing bar, 44 ... Upper left and right bar ends of X-shaped reinforcing bar, 45 ... Lower left and right bar ends of X-shaped reinforcing bar, 46 ... Vertical frame Front end, 47: U-shaped reinforcing member, 48: Lower end of U-shaped reinforcing member, 51: Upper portion of U-shaped reinforcing member, 53: U-shaped bracket, 54: Opening of U-shaped bracket, 55 ... Front end of U-shaped bracket, 56 ... Vertical frame The rear end, 57 ... color (rear color), 58 ... cross member at one end, 59 ... the other end of the cross member.

Claims (2)

In the rear part of the vehicle body comprising a bulkhead joined to the left and right rear side walls of the vehicle body so as to partition the vehicle compartment and the rear cargo room, and provided with a container holding mechanism for holding a fuel container on the rear floor part of the vehicle body,
The bulkhead has an opening in the center,
Left and right vertical frames are mounted on the left and right rear side frames of the rear floor portion, and the front portions of the left and right vertical frames and the left and right side portions of the bulkhead are connected by horizontal bars , The front end of the vertical frame is extended forward from the opening of the bulkhead, and the front end of the left and right vertical frames and the left and right base brackets installed on the front surface of the bulkhead are connected by a horizontal bar. Configure the holding mechanism,
The fuel container is retained by the container retaining Organization is located more forward than the opening of a portion of the bulkhead,
An X-shaped reinforcing bar is provided on the bulkhead, the upper ends of the left and right bars of the X-shaped reinforcing bar are fastened to the bulkhead, and the lower ends of the left and right bars of the X-shaped reinforcing bar are connected to the front end of the vertical frame of the container holding mechanism. To
A lower end of a U-shaped reinforcing member having a U-shaped portion in a plan view of the vehicle is coupled to a front end of the vertical frame, and the remaining portion of the U-shaped reinforcing member is fastened to the bulkhead.
The rear part of the vehicle body. The vertical frame is formed of a square pipe, and U-shaped brackets are fitted to the outside of the front ends of the left and right vertical frames, the openings are fitted upward, and the left and right U-shaped brackets are mounted on the left and right rear side frames. The lower end of the X-shaped reinforcing bar is overlapped and fastened to the left and right U-shaped brackets, and the front ends of the vertical frame are fastened to the left and right rear side frames, and the vertical frame is fixed to the left and right rear side frames. The vehicle body rear portion according to claim 1 , wherein the rear portion of the vehicle body is fastened by fastening a collar penetrating up and down the rear end.

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