JP6072729B2 - Body structure - Google Patents

Description

  The present invention relates to a vehicle body structure in which a frame extends in the vehicle front-rear direction, a cross member is joined to the frame, and the frame and the cross member are covered with a floor from above.

Some vehicle body structures are known that extend in the longitudinal direction of a vehicle body with side frames (hereinafter referred to as frames) arranged on both sides of the vehicle, and are formed in a closed cross section with a frame member and a reinforcing plate. .
Specifically, the frame member is formed in a cross-sectional hat shape to open the upper end, and the frame member is covered with a reinforcing plate so that the frame is formed in a closed cross section. By forming the frame in a closed cross section, it is possible to ensure the strength of the frame. (For example, refer to Patent Document 1).

JP 2000-289654 A

However, in the vehicle body structure of Patent Document 1, it is conceivable to cross a cross member between the left and right frames as a means for increasing the rigidity of the vehicle body structure. In this case, for example, an electrode for spot welding must be inserted into the frame member, and the cross member must be joined to the frame member with the inserted electrode. Therefore, the portion where the cross member is joined to the frame member cannot be formed in a closed cross section.
For this reason, it is difficult to ensure the strength of the frame, and there remains room for improvement from this viewpoint.

  An object of the present invention is to provide a vehicle body structure capable of joining a cross member to a frame and ensuring the strength and rigidity of the frame.

  According to a first aspect of the present invention, there is provided a frame that extends in the vehicle longitudinal direction, a floor that is joined to the frame so as to cover the frame from above, and a lower side of the floor that is joined to the frame and that is joined to the frame. A cross member extending in a vehicle body, wherein the frame extends in a vehicle front-rear direction, a frame main body to which the cross member is bonded, and a joint portion of the frame main body to which the cross member is bonded. A front frame upper plate and a rear frame upper plate disposed at a predetermined interval in the vehicle front-rear direction and provided at an upper portion of the frame main body, front ends of the front frame upper plate being fastened with bolts, and the rear Reinforcing part that covers the opening formed between the front frame upper plate and the rear frame upper plate from above by fastening the rear end to the frame upper plate with a bolt The reinforcing member is fixed to the floor from below, and an opening for attachment that enables fastening of the bolt is formed in a portion of the floor that overlaps the bolt in plan view. And

  According to a second aspect of the present invention, the reinforcing member is formed with a bolt receiving portion that rises upward and receives the bolt at at least one of the front end portion and the rear end portion.

Here, when inserting a bolt from the opening for attachment, it is conceivable that the inserted bolt falls to the front end portion side or the rear end portion side of the reinforcing member.
Therefore, in claim 2, a bolt receiving portion is formed on at least one of the front end portion and the rear end portion of the reinforcing member. Furthermore, the bolt receiving part was raised upward and the bolt receiving part received the bolt.

  According to a third aspect of the present invention, one of the front frame upper plate and the rear frame upper plate is disposed lower than the other, and the bolt receiving portion is fastened to the one of the front end portion and the rear end portion of the reinforcing member. It is characterized in that it is formed at the end portion.

  According to a fourth aspect of the present invention, the reinforcing member includes a reinforcing bead portion that forms a side portion in the vehicle width direction and extends in the vehicle front-rear direction so as to connect the front end portion and the rear end portion. .

  According to a fifth aspect of the present invention, the reinforcing member extends from the front end portion to the floor and is fixed to the floor from below, a front stay extends from the rear end portion to the floor, and the floor extends from below to the floor. And a rear stay that is fixed.

  According to a sixth aspect of the present invention, the front stay and the rear stay extend so as to be deformable in the longitudinal direction of the vehicle body.

Here, the reinforcing member is formed with bolt fastening portions (specifically, fastening holes) at the front end portion and the rear end portion, respectively. Therefore, it is preferable to move the reinforcing member in the vehicle front-rear direction in order to accurately position the fastening portion of the bolt.
Therefore, in claim 6, the front stay and the rear stay are extended to be deformable in the longitudinal direction of the vehicle body. Therefore, the front stay can be suitably deformed in the vehicle longitudinal direction at the front edge of the front end portion, and the rear stay can be suitably deformed in the vehicle longitudinal direction at the rear edge of the rear end portion.

In the invention according to claim 1, the joint portion is provided in the frame body, and the front frame upper plate and the rear frame upper plate are provided at a predetermined interval in the vehicle longitudinal direction of the joint portion. Therefore, an opening can be formed at the joint between the front frame upper plate and the rear frame upper plate.
Thereby, for example, an electrode for spot welding can be inserted into the joint from the opening, and the cross member can be joined to the joint with the inserted electrode.

Also, the front end of the reinforcing member is fastened to the front frame upper plate with bolts, and the rear end of the reinforcing member is fastened to the rear frame upper plate with bolts so that the opening between the upper frames of both frames is covered with the reinforcing member. I made it. Furthermore, the reinforcing member was fixed to the floor from below, and an opening for attachment was formed in a portion of the floor overlapping the bolt.
Therefore, after joining the floor to the frame, the bolt can be inserted into the front end portion side or the rear end portion side of the reinforcing member from the mounting opening.

Accordingly, the front end portion of the reinforcing member can be fastened to the front frame upper plate with the inserted bolt, the rear end portion of the reinforcing member can be fastened to the rear frame upper plate, and the opening portion can be covered with the reinforcing member. By covering the opening with the reinforcing member, the impact load input to the frame from the front or the rear of the vehicle can be suitably transmitted by the reinforcing member, and deformation of the frame from the opening can be suppressed, so the rigidity and strength of the frame Can be secured.
In addition, by ensuring the rigidity and strength of the frame, it is possible to contribute to improvement in drivability.

  Further, the reinforcing member is fixed to the floor from below, and an opening for attachment is formed on the floor. Thereby, the influence on a vehicle interior can be suppressed and it is not necessary to consider the layout of the member with which a vehicle interior is equipped.

In the invention which concerns on Claim 2, the bolt receiving part was formed in at least one of the front-end part of a reinforcement member, and a rear-end part. Furthermore, the bolt receiving part was raised upward and the bolt receiving part received the bolt.
Therefore, when the bolt inserted from the mounting opening falls to the front end side or the rear end side of the reinforcing member, the dropped bolt is received by the bolt receiving part, and the bolt is fixed to the front end part or the rear end part. I can leave. Thereby, the bolt stopped by the front end part or the rear end part can be taken out from the opening for attachment, and the bolt tightening work can be performed efficiently.

In the invention according to claim 3, one of the front frame upper plate and the rear frame upper plate is arranged lower than the other. For this reason, the end part of the reinforcing member fastened to one frame upper plate is arranged relatively far away from the floor. For this reason, when fastening the end of the reinforcing member to one frame upper plate with a bolt, it is conceivable that the bolt falls to the end of the reinforcing member.
Therefore, a bolt receiving portion is formed at the end of the reinforcing member fastened to one frame upper plate. Therefore, the bolt dropped to the end portion side of the reinforcing member can be received by the bolt receiving portion and can be stopped at the end portion. Thereby, the bolt stopped at the end can be taken out from the opening for mounting, and the bolt tightening work can be performed efficiently.

In the invention which concerns on Claim 4, the side part of the vehicle width direction was formed in the bead part among the reinforcement members. Further, the bead portion is extended in the vehicle front-rear direction, and the front end portion and the rear end portion of the reinforcing member are connected by the bead portion.
As a result, the reinforcing member can be reinforced with the bead portion to increase the strength of the reinforcing member, and the rigidity and strength of the frame can be increased with the reinforcing member.

In the invention according to claim 5, the front stay and the rear stay are provided at the front end portion and the rear end portion of the reinforcing member. Furthermore, the front stay and the rear stay were extended to the floor and fixed to the floor.
In other words, the front end and the rear end of the reinforcing member are arranged away from the floor, the front stay is interposed between the front end and the floor of the reinforcing member, and the rear stay is interposed between the rear end of the reinforcing member and the floor. I let you.

  The front stay and the rear stay are portions extending in the vertical direction, and are formed to be able to be deformed to some extent. Therefore, the positions of the front end portion and the rear end portion of the reinforcing member can be finely adjusted by deforming the front stay and the rear stay. Thereby, the front-end part and rear-end part of a reinforcement member can be positioned in the fastening position of a volt | bolt, and a reinforcement member can be assembled | attached correctly (accurately).

In the invention according to claim 6, the front stay and the rear stay are extended to be deformable in the longitudinal direction of the vehicle body. Therefore, the front stay can be suitably deformed in the vehicle longitudinal direction at the front edge of the front end portion, and the rear stay can be suitably deformed in the vehicle longitudinal direction at the rear edge of the rear end portion.
Accordingly, the reinforcing member can be moved in the vehicle front-rear direction so that the front end portion and the rear end portion of the reinforcing member can be positioned at the fastening position of the bolt, and the reinforcing member can be assembled accurately (accurately).

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a truck having a vehicle body structure according to a first embodiment of the present invention. It is a perspective view which shows the vehicle body structure of FIG. It is a disassembled perspective view which shows the state which decomposed | disassembled the floor panel and the reinforcement member from the vehicle body structure of FIG. FIG. 3 is an enlarged view of part 4 of FIG. 2. It is a disassembled perspective view which shows the right front side frame of FIG. FIG. 6 is a sectional view taken along line 6-6 of FIG. It is a perspective view which shows the state which fixed the reinforcement member of FIG. 5 to the floor panel. FIG. 8 is a cross-sectional view taken along line 8-8 in FIG. 4. It is a perspective view which shows the state which fastened the reinforcement member of FIG. 5 to the front and back frame upper plate. FIG. 10 is a view taken in the direction of arrow 10 in FIG. 9 and shows a state where the front and rear bolts are removed. It is a figure explaining the example which attaches the reinforcement member of Example 1 to a floor panel. It is a figure explaining the example which carries out the screw coupling | bonding of the front volt | bolt of Example 1 to a front welding nut, and is screw-coupled to a rear welding nut. It is a figure explaining the example which assembles the reinforcement member of Example 1 to the front and back frame upper plates. It is a figure explaining the example which transmits the impact load input into the right front side frame of Example 1. FIG. It is a perspective view which shows the reinforcement member of Example 2 which concerns on this invention. It is a figure explaining the example which receives a rear volt | bolt in the volt | bolt receiving part formed in the reinforcement member of FIG.

  The best mode for carrying out the present invention will be described below with reference to the accompanying drawings. Note that “front (Fr)”, “rear (Rr)”, “left (L)”, and “right (R)” follow the direction seen from the driver.

A vehicle body structure 10 according to the first embodiment will be described.
As shown in FIG. 1, the vehicle body structure 10 is, for example, a vehicle body front structure that is provided in a cab over truck Ve and that constitutes a front part and a floor part of a vehicle compartment 12 of the truck Ve.
2 and 3, the vehicle body structure 10 includes a dashboard 15 provided between the left and right front pillars 14, left and right front side frames 16 provided in a lower portion 15 a of the dashboard 15, and left and right A floor cross member 17 and a lower cross member 18 that are spanned over the front side frame 16 and a floor panel 19 that covers the left and right front side frames 16 and the floor cross member 17 from above are included.
The left front side frame 16 and the right front side frame 16 are bilaterally symmetric skeleton materials. Hereinafter, the right front side frame 16 will be described and description of the left front side frame 16 will be omitted.

The floor panel 19 is joined to the upper portions of the left and right front side frames 16 and the floor cross member 17 in a state of covering the left and right front side frames 16, the floor cross member 17 and the lower cross member 18 from above.
The floor panel 19 is formed with a front opening 22 and a rear opening 23 (see also FIG. 5) in a right side portion 19a located above the right front side frame 16. Further, a front opening 22 and a rear opening 23 are formed in the left side portion 19 b located above the left front side frame 16.

The floor cross member 17 is provided below the floor panel 19 by spanning the joint 41 of the right front side frame 16 and the joint 41 of the left front side frame 16.
In this state, the floor cross member 17 extends along the lower surface of the floor panel 19 in the vehicle width direction in a substantially straight line shape when viewed from the front.

The lower cross member 18 is formed in a substantially U shape when viewed from the front, and spans the joint portion 41 of the right front side frame 16 and the joint portion 41 of the left front side frame 16 so as to be spaced below the floor panel 19. Is provided.
That is, the lower cross member 18 is disposed in a state of being separated downward from the floor cross member 17 and extends in the vehicle width direction substantially parallel to the floor cross member 17.

  As shown in FIG. 4, the right end portion 17 a of the floor cross member 17 and the right end portion 18 a of the lower cross member 18 are joined to the joint portion 41 of the right front side frame 16. The right front side frame 16 extends in the vehicle front-rear direction while being joined to the lower portion 15a (see FIG. 3) of the dashboard 15 and the right wheel house 21 (see FIG. 3).

  As shown in FIG. 5, the right front side frame 16 includes a frame main body 31 extending in the vehicle front-rear direction, a front frame upper plate 32 and a rear frame upper plate 33 provided on the frame main body 31, a front frame upper plate 32, and And a reinforcing member 34 that covers the opening 28 between the rear frame upper plates 33 from above.

  As shown in FIGS. 4 and 6, the frame main body 31 extends in the vehicle front-rear direction. The frame body 31 includes a frame outer wall 36 facing the vehicle width direction outer side (namely, the vehicle exterior 13 side), a frame inner wall 37 facing the vehicle width direction inner side (namely, the vehicle compartment 12 side), a lower end 36a of the frame outer wall 36, and A frame bottom 38 that connects the lower end 37a of the frame inner wall 37, and an inner flange 39 that is bent substantially horizontally from the upper end 37b of the frame inner wall 37 toward the inside in the vehicle width direction.

  The frame main body 31 is formed in a substantially U-shaped cross section by the frame inner wall 37, the frame outer wall 36, and the frame bottom 38, and the upper portion 31a of the frame main body 31 is opened. The frame body 31 has a joint portion 41 to which the right end portion 17a of the floor cross member 17 and the right end portion 18a of the lower cross member 18 are joined.

  As shown in FIG. 7, the front frame upper plate 32 is joined to the front portion 42 of the front frame body 42 at the front portion of the joint body 41 (hereinafter referred to as the front frame body) 42 of the frame body 31. ing. Therefore, the upper end of the front frame main body 42 is closed by the front frame upper plate 32, and a closed cross section is formed by the front frame main body 42 and the front frame upper plate 32.

  In addition, the rear frame upper plate 33 is joined to a portion of the frame main body 31 on the vehicle rear side of the joint portion 41 (hereinafter referred to as a rear frame main body) 43 and an upper portion 43 a of the rear frame main body 43. Therefore, the upper end of the rear frame main body 43 is closed by the rear frame upper plate 33, and a closed section is formed by the rear frame main body 43 and the rear frame upper plate 33 (see also FIG. 6).

The front frame upper plate 32 and the rear frame upper plate 33 are joined by providing the front frame upper plate 32 on the vehicle front side of the joint portion 41 and the rear frame upper plate 33 on the vehicle rear side of the joint portion 41. 41 are arranged at a predetermined interval L1 in the longitudinal direction of the vehicle.
In the right front side frame 16, an opening 28 is formed in a substantially rectangular shape in plan view between the rear end portion 32 a of the front frame upper plate 32 and the front end portion 33 a of the rear frame upper plate 33. The opening 28 is opened at the upper portion of the joint portion 41 of the frame body 31.

  The front frame upper plate 32 has a front mounting hole 45 formed in the rear end portion 32a, and includes a front welding nut 46 that is coaxial with the front mounting hole 45 and provided on the back surface of the rear end portion 32a. Further, the rear frame upper plate 33 has a rear mounting hole 48 formed in the front end portion 33a, and a rear welding nut 49 provided coaxially with the rear mounting hole 48 on the back surface of the front end portion 33a.

As shown in FIG. 8, the front frame upper plate 32 is disposed below the lower surface of the floor panel 19 by a height dimension H1. Further, the rear frame upper plate 33 is disposed below the lower surface of the floor panel 19 by a height dimension H2.
Therefore, the rear frame upper plate 33 is disposed below the front frame upper plate 32 by the height dimension H3.

  Returning to FIG. 7, the right end portion 17a of the floor cross member 17 is joined to the joining portion 41 of the frame body 31 (particularly, the portion 41a forming the frame inner wall 37) by spot welding. Here, the upper portion of the joint portion 41 is opened by the opening portion 28. Therefore, an electrode for spot welding can be inserted into the inside 51 of the frame main body 31 from the opening portion 28, and the right end portion 17 a of the floor cross member 17 can be spot welded to the joint portion 41.

  Further, the right end portion 18a of the lower cross member 18 is joined to the joining portion 41 of the frame body 31 (particularly, the portion 41b forming the frame bottom portion 38) by spot welding. Also in this case, an electrode for spot welding can be inserted into the inside 51 of the frame body 31 from the opening 28, and the right end portion 18a of the lower cross member 18 can be spot welded to the joint portion 41.

As shown in FIGS. 5 and 9, the reinforcing member 34 is disposed in the opening 28 between the front frame upper plate 32 and the rear frame upper plate 33. The reinforcing member 34 includes a reinforcing portion main body 53 that covers the opening 28 from above, a front stay 54 provided at the front end portion 53 a of the reinforcing portion main body 53, and a rear stay provided at the rear end portion 53 b of the reinforcing portion main body 53. 55.
As an example, the reinforcing member 34 is formed by integrally bending a reinforcing portion main body 53, a front stay 54, and a rear stay 55 by bending a single steel plate.

  As shown in FIG. 10, the reinforcing portion main body 53 is formed in a substantially rectangular flat plate shape in plan view, and forms an outer bead portion 56 that forms an outer portion on the outer side in the vehicle width direction, and an inner portion on the inner side in the vehicle width direction. The inner bead portion 57, the front fastening hole 58 formed in the front end portion 53a, and the rear fastening hole 59 formed in the rear end portion 53b.

The outer bead portion 56 is a reinforcing portion that extends in the vehicle front-rear direction so as to connect the outer portion 53c of the front end portion 53a and the outer portion 53d of the rear end portion 53b. The outer bead portion 56 is formed in a substantially curved cross section so as to protrude upward in order to increase rigidity (see FIG. 6).
Further, the inner bead portion 57 extends in the vehicle front-rear direction so as to connect the inner portion 53e of the front end portion 53a and the inner portion 53f of the rear end portion 53b. The inner bead portion 57 is formed in a substantially curved cross section so as to protrude upward in the same manner as the outer bead portion 56 in order to increase rigidity (see FIG. 6).

As described above, the outer side portion of the reinforcing portion main body 53 is formed by the outer bead portion 56, and the inner side portion of the reinforcing portion main body 53 is formed by the inner bead portion 57. Reinforced by a bead portion 57.
Therefore, the strength of the reinforcing portion main body 53 (that is, the reinforcing member 34) is increased by the outer bead portion 56 and the inner bead portion 57.

Returning to FIG. 8, the front bolt 61 is inserted into the front fastening hole 58 of the reinforcing portion main body 53 and the front mounting hole 45 of the front frame upper plate 32, and the inserted front bolt 61 is screwed to the front welding nut 46. Yes. Therefore, the front end portion 53 a of the reinforcing portion main body 53 is fastened to the rear end portion 32 a of the front frame upper plate 32 with the front bolt 61.
A rear bolt 62 is inserted into the rear fastening hole 59 of the reinforcing portion main body 53 and the rear mounting hole 48 of the rear frame upper plate 33, and the inserted rear bolt 62 is screwed to the rear welding nut 49. Therefore, the rear end portion 53 b of the reinforcing portion main body 53 is fastened to the front end portion 33 a of the rear frame upper plate 33 by the rear bolt 62.
Thus, the reinforcing portion main body 53 is attached to the front and rear frame upper plates 32 and 33 so as to cover the opening 28 between the front frame upper plate 32 and the rear frame upper plate 33 from above.

As shown in FIG. 6, the opening 28 is covered with the reinforcing portion main body 53 from above, so that the joint portion 41 of the frame main body 31 and the reinforcing portion main body 53 are formed in a closed cross section. Further, as shown in FIG. 8, a closed cross section is formed by the front frame main body 42 and the front frame upper plate 32, and a closed cross section is formed by the rear frame main body 43 and the rear frame upper plate 33. Therefore, the right front side frame 16 is formed in a closed cross section in the entire vehicle longitudinal direction.
Furthermore, as shown in FIG. 10, the strength of the reinforcing portion main body 53 is increased by the outer bead portion 56 and the inner bead portion 57. Accordingly, the rigidity and strength of the right front side frame 16 are enhanced by the reinforcing portion main body 53 (that is, the reinforcing member 34) having high strength.

As shown in FIGS. 8 and 9, a front stay 54 is provided at the center in the vehicle width direction of the front edge 53 g of the front end portion 53 a of the reinforcing portion main body 53. The front stay 54 has a front inclined portion 65 extending in an inclined manner toward the front side of the vehicle from the center in the vehicle width direction of the front edge 53g (that is, the floor panel 19). The piece 66 is projected toward the front of the vehicle.
The front joining piece 66 is fixed to the lower surface of the floor panel 19 by spot welding from below.

Further, a rear stay 55 is provided at the center of the rear edge 53h in the vehicle width direction in the rear end portion 53b of the reinforcing portion main body 53. The rear stay 55 has a rear inclined portion 68 extending from the center of the rear edge 53h in the vehicle width direction toward the upper side (that is, the floor panel 19) so as to incline toward the rear side of the vehicle. A piece 69 is projected toward the rear of the vehicle.
The rear joining piece 69 is fixed to the lower surface of the floor panel 19 by spot welding from below.

  Returning to FIG. 7, the front joining piece 66 and the rear joining piece 69 are fixed to the lower surface of the floor panel 19, whereby the reinforcing member 34 is attached to the lower surface of the floor panel 19 from below. In this state, the floor panel 19 is joined to the upper part of the right front side frame 16 and the floor cross member 17 (see also FIG. 8).

As shown in FIG. 8, the front inclined portion 65 of the front stay 54 extends in the vertical direction by a height dimension H1. Further, the rear inclined portion 68 of the rear stay 55 extends in the vertical direction by a height dimension H2.
Therefore, when the floor panel 19 is joined to the upper part of the right front side frame 16 and the floor cross member 17, the front end portion 53 a of the reinforcing member 34 (specifically, the reinforcing portion main body 53) is connected to the front frame upper plate 32. The rear end portion 53 b is placed on the rear end portion 32 a and the rear end portion 53 b is placed on the front end portion 33 a of the rear frame upper plate 33.

In this way, the front stay 54 is extended in the vertical direction by the height dimension H1, so that it can be deformed to some extent. Further, the rear stay 55 is extended in the vertical direction by the height dimension H2, so that it can be deformed to some extent.
Therefore, the position of the reinforcing portion main body 53 can be finely adjusted by deforming the front stay 54 and the rear stay 55. Thereby, the front fastening hole 58 of the reinforcing portion main body 53 can be positioned in the front mounting hole 45 of the front frame upper plate 32, and the rear fastening hole 59 of the reinforcing portion main body 53 can be positioned in the rear mounting hole 48 of the rear frame upper plate 33. .

The front opening 22 of the floor panel 19 is opened above the front fastening hole 58 of the reinforcing portion main body 53 and coaxially with the front fastening hole 58. Further, the rear opening 23 of the floor panel 19 is opened above the rear fastening hole 59 of the reinforcing portion main body 53 and coaxially with the rear fastening hole 59.
Therefore, in a state where the front end portion 53a of the reinforcing portion main body 53 is fastened to the rear end portion 32a of the front frame upper plate 32 with the front bolt 61, the front opening 22 is formed to overlap the front bolt 61 in plan view. . Similarly, when the rear end portion 53b of the reinforcing portion main body 53 is fastened to the front end portion 33a of the rear frame upper plate 33 with the rear bolt 62, the rear opening 23 is formed to overlap the rear bolt 62 in plan view. Yes.

The front opening 22 and the rear opening 23 are larger than the heads 61a and 62a of the front and rear bolts 61 and 62. Therefore, a tool can be inserted into the head 61a of the front bolt 61 from above the floor panel 19 through the front opening 22, and the front bolt 61 can be tightened with the inserted tool.
Similarly, a tool can be inserted into the head 62a of the rear bolt 62 from above the floor panel 19 through the rear opening 23, and the rear bolt 62 can be tightened with the inserted tool.
That is, the front opening 22 and the rear opening 23 are mounting openings that allow the front and rear bolts 61 and 62 to be fastened.

  By tightening the front bolt 61, the front end portion 53 a of the reinforcing portion main body 53 is fastened to the rear end portion 32 a of the front frame upper plate 32 by the front bolt 61. Further, by tightening the rear bolt 62, the rear end portion 53 b of the reinforcing portion main body 53 is fastened to the front end portion 33 a of the rear frame upper plate 33 by the rear bolt 62. As a result, the opening 28 is covered with the reinforcing portion main body 53.

Here, by deforming the front stay 54 and the rear stay 55, the front fastening hole 58 of the reinforcing portion main body 53 is positioned in the front mounting hole 45 of the front frame upper plate 32, and the rear fastening hole 59 of the reinforcing portion main body 53 is formed. The rear frame upper plate 33 is positioned in the rear mounting hole 48.
Thereby, the reinforcing member 34 can be assembled to the front frame upper plate 32 and the rear frame upper plate 33 accurately (with high accuracy).

  By the way, the reinforcing member 34 has a front fastening hole 58 formed in the front end portion 53 a of the reinforcing portion main body 53, and a rear fastening hole 59 formed in the rear end portion 53 b of the reinforcing portion main body 53. Therefore, in order to accurately position the front fastening hole 58 and the rear fastening hole 59 in the front mounting hole 45 and the rear mounting hole 48, it is conceivable to move the reinforcing member 34 in the vehicle front-rear direction.

  Therefore, the front stay 54 is extended from the front edge 53g of the front end portion 53a, and the rear stay 55 is extended from the rear edge 53h of the rear end portion 53b. That is, the front stay 54 and the rear stay 55 extend so as to be deformable in the longitudinal direction of the vehicle body. Therefore, the front stay 54 and the rear stay 55 can be suitably deformed in the vehicle longitudinal direction.

  As a result, the reinforcing member 34 is moved in the vehicle front-rear direction (finely adjusted), the front fastening hole 58 is positioned in the front mounting hole 45 of the front frame upper plate 32, and the rear fastening hole 59 is placed in the rear frame upper plate 33. The rear mounting hole 48 can be suitably positioned. Accordingly, the reinforcing member 34 can be more accurately (accurately) assembled to the front frame upper plate 32 and the rear frame upper plate 33.

By attaching the reinforcing member 34 to the front frame upper plate 32 and the rear frame upper plate 33, the opening 28 is covered with the reinforcing member 34. Thereby, the impact load input to the right front side frame 16 from the front or rear of the vehicle can be suitably transmitted by the reinforcing member 34, and the rigidity and strength of the right front side frame 16 are ensured.
In addition, securing the rigidity and strength of the right front side frame 16 can contribute to improvement in drivability.

  Further, the reinforcing member 34 is fixed to the floor panel 19 from below, and the front opening 22 and the rear opening 23 are formed in the floor panel 19. Thereby, the influence on the inside of the vehicle compartment 12 can be suppressed, and it is not necessary to consider the layout of the members provided in the vehicle compartment 12.

Next, an example in which the reinforcing member 34 according to the present invention is assembled to the right front side frame 16 will be described with reference to FIGS.
As shown in FIG. 11A, the upper portion of the joint portion 41 is opened at the opening portion 28. An electrode for spot welding is inserted into the inside 51 of the frame body 31 from the opening 28, and the right end portion 17 a of the floor cross member 17 is spot welded to the joint portion 41.
Further, an electrode for spot welding is inserted into the inside 51 of the frame body 31 from the opening 28, and the right end portion 18 a of the lower cross member 18 is spot welded to the joint portion 41.

As shown in FIG. 11B, the front stay 54 (specifically, the front joining piece 66) of the reinforcing portion main body 53 is fixed to the lower surface of the floor panel 19 by spot welding from below as indicated by an arrow A. Similarly, the rear stay 55 (specifically, the rear joining piece 69) of the reinforcing portion main body 53 is fixed to the lower surface of the floor panel 19 as shown by an arrow B by spot welding from below.
Thereby, the reinforcing member 34 is attached to the lower surface of the floor panel 19 from below.

As shown in FIG. 12A, the front fastening hole 58 of the reinforcing member 34 is disposed coaxially with the front opening 22 of the floor panel 19, and the rear fastening hole 59 of the reinforcing member 34 is the rear opening of the floor panel 19. 23 on the same axis.
In this state, the floor panel 19 is joined to the upper part of the right front side frame 16 and the upper part of the floor cross member 17 as indicated by an arrow C from above.

As shown in FIG. 12B, the front end portion 53 a of the reinforcing member 34 (specifically, the reinforcing portion main body 53) is placed on the rear end portion 32 a of the front frame upper plate 32 from above. Further, the rear end portion 53 b of the reinforcing portion main body 53 is placed on the front end portion 33 a of the rear frame upper plate 33 from above.
Further, the front fastening hole 58 of the reinforcing portion main body 53 is disposed coaxially with the front mounting hole 45 of the front frame upper plate 32. Further, the rear fastening hole 59 of the reinforcing portion main body 53 is arranged coaxially with the rear mounting hole 48 of the rear frame upper plate 33.

In this state, the front bolt 61 is inserted into the front opening 22 of the floor panel 19 and the front fastening hole 58 of the reinforcing member 34 as shown by the arrow D, and the inserted front bolt 61 is inserted into the front welding nut 46 (see FIG. 12B). Screw together.
Further, the rear bolt 62 is inserted into the rear opening 23 of the floor panel 19 and the rear fastening hole 59 of the reinforcing member 34 as shown by an arrow E, and the inserted rear bolt 62 is screwed to the rear welding nut 49 (see FIG. 12B). To do.

As shown in FIG. 13, the front end portion 53 a of the reinforcing portion main body 53 is fastened to the rear end portion 32 a of the front frame upper plate 32 with a front bolt 61. Further, the rear end portion 53 b of the reinforcing portion main body 53 is fastened to the front end portion 33 a of the rear frame upper plate 33 by the rear bolt 62.
Therefore, the reinforcing portion main body 53 is assembled to the front frame upper plate 32 and the rear frame upper plate 33 so as to cover the opening 28 between the front frame upper plate 32 and the rear frame upper plate 33 from above.

Thereby, the floor cross member 17 and the lower cross member 18 can be attached to the joint portion 41 of the right front side frame 16 by using the opening 28 of the right front side frame 16.
Further, in the subsequent process of attaching the floor cross member 17 and the lower cross member 18 to the joint portion 41, the reinforcing member 34 is assembled to the front frame upper plate 32 and the rear frame upper plate 33, so that the opening 28 is formed by the reinforcing member 34. Can be covered.
By covering the opening 28 with the reinforcing member 34, the strength and rigidity of the right front side frame 16 can be secured.

Next, an example of suitably transmitting the impact load F1 input to the front end portion 16a of the right front side frame 16 according to the present invention to the rear of the vehicle will be described based on FIG.
As shown in FIG. 14A, the impact load F <b> 1 is input to the front end portion 16 a of the right front side frame 16 when the oncoming vehicle collides with the front right portion of the cab overtrack Ve. The impact load F1 input to the front end portion 16a of the right front side frame 16 is transmitted to the rear of the vehicle through the right front side frame 16.

As shown in FIG. 14B, a part of the impact load F1 transmitted to the right front side frame 16 is transmitted as the impact load F2 to the reinforcing member 34 through the front frame upper plate 32. The impact load F2 transmitted to the reinforcing member 34 is transmitted to the rear frame upper plate 33 behind the vehicle body via the reinforcing member 34.
Further, the load transmitted to the right front side frame 16 is transmitted as a load F3 to the rear of the vehicle through the frame body 31.

Thereby, the impact load F <b> 1 input to the front end portion 16 a of the right front side frame 16 can be suitably transmitted to the vehicle rear side by the right front side frame 16. Furthermore, when the impact load F1 from the front of the vehicle is input to the right front side frame 16, it is possible to suppress the right front side frame 16 from being deformed from the opening portion 28 by the impact load F1. Thus, the right front side frame 16 is suitably transmitted to the rear of the vehicle, and the right front side frame 16 is prevented from being deformed from the opening 28 by the impact load F1. The rigidity and strength can be secured.
In addition, by ensuring the rigidity and strength of the right front side frame 16, it is possible to more suitably ensure the rigidity and strength of the vehicle body structure 10, and the cab overtrack Ve (see FIG. 14A) is operated. It can contribute to the improvement of sex.

The reinforcing member 80 according to the second embodiment will be described.
In the reinforcing member 80 of the second embodiment, the same parts as those of the reinforcing member 34 of the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.
As shown in FIG. 15, the reinforcing member 80 is formed by forming a bolt receiving portion 82 together with a rear inclined portion 68 of the rear stay 55 at the rear end portion 53 b of the reinforcing portion main body 53, and the other configurations are the same as those of the first embodiment. The same as the reinforcing member 34.

The bolt receiving portion 82 is raised upward along the both sides of the rear inclined portion 68 from the rear edge 53h of the rear end portion 53b. By forming the bolt receiving portions 82 on both sides of the rear inclined portion 68, the bolt receiving portion 82 and the rear inclined portion 68 are formed in a curved shape so that the wall surface on the rear end portion 53b side is substantially concave in plan view. Has been.
Therefore, the bolt (see FIG. 16) after falling on the rear end portion 53 b can be received by the bolt receiving portion 82 and the rear inclined portion 68.

  Here, as shown in FIG. 8, the rear frame upper plate 33 is disposed below the front frame upper plate 32 by a height dimension H3. Further, the front end portion 53a (see FIG. 15) of the reinforcing portion main body 53 is fastened to the rear end portion 32a of the front frame upper plate 32, and the rear end portion 53b ( Are fastened).

  Therefore, as shown in FIG. 16, the rear end portion 53b of the reinforcing portion main body 53 is arranged to be spaced downward from the floor panel 19 as compared with the front end portion 53a. Therefore, when the rear bolt 62 is inserted from the rear opening 23 of the floor panel 19 into the rear fastening hole 59 of the reinforcing portion main body 53 (specifically, the rear end portion 53b), the rear bolt 62 falls to the rear end portion 53b. It is possible to do.

Therefore, the bolt receiving portion 82 is formed at the rear end portion 53b of the reinforcing member 80. The bolt receiving portion 82 is raised upward along both sides of the rear inclined portion 68. Therefore, the rear bolt 62 dropped to the rear end portion 53b side of the reinforcing portion main body 53 can be received by the bolt receiving portion 82 and the rear inclined portion 68, and the rear bolt 62 can be stopped at the rear end portion 53b.
Accordingly, the rear bolt 62 stopped by the rear end portion 53b can be taken out from the rear opening 23 of the floor panel 19, and the tightening operation of the rear bolt 62 (that is, the tightening operation of the reinforcing member 80) can be performed efficiently. Can do.

The vehicle body structure according to the present invention is not limited to the above-described embodiments, and can be changed or improved as appropriate.
For example, in the first embodiment and the second embodiment, the example in which the vehicle body structure 10 is applied to the truck Ve is described as an example. However, the present invention is not limited to this, and the vehicle body structure 10 is applied to other vehicles such as a passenger car. It is also possible to do.

  In the first embodiment and the second embodiment, the example in which the vehicle body structure 10 is the vehicle body front structure has been described. However, the structure is not limited to this, and the vehicle body structure 10 may be another structure such as the vehicle body rear structure. It is also possible to apply to.

  Further, in the first embodiment and the second embodiment, the example in which the impact load F1 input to the front end portion 16a of the right front side frame 16 is transmitted to the rear of the vehicle has been described. It is also possible to transmit the impact load input to the rear end portion of the vehicle 16 forward of the vehicle.

  In the first and second embodiments, the example in which the frame is applied to the left and right front side frames 16 has been described. However, the present invention is not limited thereto, and the frame is applied to other skeleton members such as the left and right rear side frames. It is also possible to do.

Furthermore, in the first embodiment and the second embodiment, the example in which the rear frame upper plate 33 is disposed below the front frame upper plate 32 by the height dimension H3 has been described. It is also possible to arrange the front frame upper plate 32 below the upper plate 33.
It is also possible to arrange the front frame upper plate 32 and the rear frame upper plate 33 at the same height position.

Further, in the second embodiment, an example in which the rear frame upper plate 33 is disposed below the front frame upper plate 32 and the bolt receiving portion 82 is formed at the rear end portion 53b of the reinforcing member 80 (reinforcing portion main body 53) will be described. However, the present invention is not limited thereto, and the front frame upper plate 32 may be disposed below the rear frame upper plate 33 to form a bolt receiving portion at the front end portion 53a of the reinforcing member 80 (reinforcing portion main body 53). is there.
Furthermore, it is also possible to form a bolt receiving part in the both ends 53a and 53b of the front-end part of the reinforcement member 80 (reinforcement part main body 53) and the rear-end part 53b, respectively.

  In the second embodiment, the example in which the wall surface on the rear end portion 53b side of the bolt receiving portion 82 is formed in a curved shape having a substantially concave shape in plan view is not limited thereto, but the bolt receiving portion is seen in plan view. It is also possible to form it flat.

  Further, the vehicle body structure shown in the first and second embodiments, left and right front side frames, floor cross members, lower cross members, floor panels, front and rear openings, openings, frame bodies, front and rear frame upper plates, The shapes and configurations of the reinforcing member, the joint portion, the reinforcing portion main body, the front and rear stays, the inner and outer bead portions, the bolt receiving portion, and the like are not limited to those illustrated, and can be appropriately changed.

  The present invention is suitable for application to an automobile having a vehicle body structure in which a cross member is joined to a frame extending in the vehicle longitudinal direction and the frame and the cross member are covered with a floor.

10 Body structure 16 Left and right front side frames (frames)
17 Floor cross member (cross member)
18 Lower cross member (cross member)
19 Floor panel (floor)
22 Front opening (opening)
23 Rear opening (opening)
28 opening 31 frame main body 31a upper part of frame main body 32 front frame upper plate 33 rear frame upper plate 34,80 reinforcing member 41 joint portion 53 reinforcing portion main body 53a front end portion of reinforcing portion main body (front end portion of reinforcing member)
53b Rear end of reinforcing body (rear end of reinforcing member)
54 Front stay 55 Rear stay 56 Outside bead part (bead part)
57 Inner bead part (bead part)
61 Front bolt
62 Rear bolt (bolt)
82 Bolt receiving part L1 Predetermined interval

Claims (6)

A frame extending in the longitudinal direction of the vehicle;
A floor joined to the frame so as to cover the frame from above;
A vehicle body structure comprising a cross member provided below the floor and joined to the frame and extending in a vehicle width direction,
The frame is
A frame main body that extends in the vehicle front-rear direction and to which the cross member is joined;
A front frame upper plate and a rear frame upper plate disposed at a predetermined interval in a vehicle front-rear direction of a joint portion to which the cross member is joined of the frame body;
A front end portion is fastened to the front frame upper plate with a bolt, and a rear end portion is fastened to the rear frame upper plate with a bolt, thereby forming between the front frame upper plate and the rear frame upper plate. A reinforcing member that covers the opening from above,
The reinforcing member is fixed to the floor from below,
A vehicle body structure characterized in that an opening for attachment that enables fastening of the bolt is formed in a portion of the floor that overlaps the bolt in plan view. The reinforcing member is
2. The vehicle body structure according to claim 1, wherein a bolt receiving portion that rises upward and receives the bolt is formed on at least one of the front end portion and the rear end portion. One of the front frame upper plate and the rear frame upper plate is disposed lower than the other,
The bolt receiving portion is
The vehicle body structure according to claim 2, wherein the reinforcing member is formed at an end portion fastened to one of the front end portion and the rear end portion of the reinforcing member. The reinforcing member is
The vehicle body structure according to claim 1, further comprising a reinforcing bead portion that forms a side portion in a vehicle width direction and extends in a vehicle front-rear direction so as to connect the front end portion and the rear end portion. The reinforcing member is
A front stay extending from the front end to the floor and fixed to the floor from below;
A rear stay extending from the rear end portion to the floor and fixed to the floor from below;
The vehicle body structure according to claim 1, comprising:   6. The vehicle body structure according to claim 5, wherein the front stay and the rear stay extend so as to be deformable in a longitudinal direction of the vehicle body.

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