CN1903635A

CN1903635A - Vehicle-body structure

Info

Publication number: CN1903635A
Application number: CNA2006100005744A
Authority: CN
Inventors: 黑川博幸; 稻毛大辅; 横田义则
Original assignee: Mitsubishi Motors Corp
Current assignee: Mitsubishi Motors Corp
Priority date: 2005-01-12
Filing date: 2006-01-11
Publication date: 2007-01-31
Anticipated expiration: 2026-01-11
Also published as: JP2006193018A; TWI276558B; TW200628332A; CN1903635B; DE102006001484B4; DE102006001484A1; JP4403970B2

Abstract

In this car body structure, the bulged part 15 for housing the upside of the fuel tank 12 is formed on a floor panel part 17 for installing a front seat 10 in the floor panel 6 by deep drawing with at least the flat panel part 17a to 17c extending from the base of the bulged part 15 to the front edge of the vehicle and the side edges at both sides in the width direction left undone. The flat floor panel parts 17a to 17c extending to the base of the bulged part 15 separated from the front edge and the side edges of the floor panel 6 are the parts to which the skeleton members of the car body 2 can be fixed. Thus, the floor panel 6 can be reinforced by utilizing the skeleton members of the car body.

Description

Body structure

Technical field

The present invention relates to a kind ofly be provided with the body structure that to accommodate Fuel Tank under the floor of front chair.

Background technology

In automobile, have a kind of for effectively utilizing the technology that large-scale mobile units such as Fuel Tank are set in the space of the indoor space of car below front chair.In this body structure, the ground plate portion below front chair is formed with to the indoor portion of heaving that bloats of car.In heaving portion, this contains the top of Fuel Tank.

All the time, about this structure of accommodating Fuel Tank below front chair, as disclosed in the patent documentation TOHKEMY 2000-85382 communique, the ground plate portion below front chair is formed with to the indoor outstanding portion of heaving of car.This heave portion across the whole zone of overall width direction, promptly descend the whole zone between the longeron.This heaves the top that contains Fuel Tank in the portion.And, adopted a kind of by increasing the structure that various strengthening parts replenish the rigidity deficiency that is caused by the portion of heaving.

But the method for replenishing the floor rigidity with strengthening part has strengthened the burden on the cost.Owing to making tare, the increase of strengthening part increases.And for lilliput car, it is especially difficult to strengthen the floor with other strengthening part.This is the lilliput car that is restricted because of the size for the overall width direction, and the space between the overall width direction end on Fuel Tank and floor is restricted.

Summary of the invention

The object of the present invention is to provide a kind of body structure, it just can be strengthened the floor with the portion of heaving that is used to accommodate Fuel Tank with simple structure.

For reaching above-mentioned purpose, in an embodiment of the present invention, on the position that is provided with front chair on floor, be formed with the portion of heaving of the upside that is used to accommodate Fuel Tank by deep drawing, and reserve plane plate portion from this base portion to front edge portion of vehicle and the lateral edge portion of overall width direction both sides of heaving portion at least, and, but will heave the flange part of portion's ground plate portion on every side as the fixed vehicle skeleton part.

According to said structure and since with the flange part of heaving portion's adjacency on the fixing original skeleton part of vehicle body, thereby can fully improve the rigidity on floor with the portion of heaving.Thus, when strengthening the floor, can suppress the additive incrementation strengthening part.

Therefore, just can strengthen with simple structure the floor that is formed with the portion of heaving that is used to accommodate Fuel Tank.Especially only use the vehicle skeleton part just can guarantee rigidity, so be suitable for the vehicle of bigger lilliput car such being difficult to the increasing strengthening part of overall width direction dimensional restriction most.

In an embodiment of the present invention, except that above-mentioned purpose, for with simple structure, further reasonably guarantee to heave the rigidity of the plane ground plate portion in portion the place ahead, at least the plane ground board of heaving between the front edge portion on portion and floor has the reinforced rib portion that strengthens usefulness, and this reinforced rib portion adopts the identical operation shaping of manufacturing procedure with the portion of heaving that is used to be shaped.

According to said structure, on the basis of above-mentioned effect, only form the rigidity that reinforced rib portion just can strengthen heaving the plane ground plate portion in portion the place ahead.And, owing to reinforced rib portion is that utilize to be shaped deep drawing when heaving portion is shaped and processes, so can realize reducing machining period number and cost-cutting.

In another embodiment of the present invention, except that above-mentioned purpose, in order not to be subjected to the influence that reinforced rib portion is shaped, and by the deep drawing portion of heaving that is shaped well that is shaped, the manufacturing procedure that deep drawing is shaped is used the operation with following steps: first step, by mould and holding pad clamping floor; Second step utilizes the firm and hard over the ground deep drawing of executing of drift to be shaped and to heave portion with shaping; And third step, close to an end before from heaving portion's shaping, utilize floating punch shaping reinforced rib portion on the floor.

According to said structure, on the basis of above-mentioned effect, the influence that the portion of heaving is not shaped by reinforced rib portion can is shaped and is shaped well by deep drawing.

In an embodiment of the present invention, except that above-mentioned purpose, be directly to use the skeleton part of the overall width both sides that are configured in vehicle body to strengthen the rigidity on floor, adopted the base portion of flange part of the overall width direction both sides that clip the portion of heaving or its peripheral part with other plate portion together be engaged in the structure of longeron.

According to said structure, on the basis of above-mentioned effect, the original longeron in overall width both sides that can also the flexible utilization vehicle body is strengthened the rigidity on floor.

In an embodiment of the present invention, except that above-mentioned purpose, be the longitudinal wall inclination of the linearize of control longeron and the portion of heaving that forms by deep drawing, and can carry out with longeron between engage, heave the edge part outside the base portion of portion or the overall width direction that its peripheral part is engaged in longeron.

According to said structure, on the basis of above-mentioned effect, can suppress to be shaped and the longitudinal wall degree of dip of the portion of heaving that forms, and can engage with longeron by deep drawing, can alleviate the burden of deep drawing shaping.And, because with approaching straight state configuration longeron, so can improve the collision safety performance of longeron simultaneously.

Describe in following record about other purposes of the present invention and advantage, or be illustrated by inventive embodiments.And various purposes of the present invention and advantage can be reached by the structure and the combination that spell out in the protection domain of the present invention.

Description of drawings

At this, the accompanying drawing that constitutes this specification sheets part shows the preferred embodiments of the present invention, cooperates being described in detail of above-mentioned general description and following preferred embodiment simultaneously, is used to illustrate flesh and blood of the present invention.

Fig. 1 is the block diagram of the body structure of expression one embodiment of the invention;

To be expression unload block diagram behind the front chair from this body structure to Fig. 2;

Fig. 3 is the three-dimensional exploded view of this body structure;

Fig. 4 is the cutaway view along A-A line among Fig. 2;

Fig. 5 is the cutaway view along B-B line among Fig. 2;

To be expression be formed on the floor figure of the state that is provided with at first of the manufacturing procedure when heaving portion and reinforced rib portion that is shaped by deep drawing to Fig. 6;

Fig. 7 is the cutaway view of the floor hold mode in this manufacturing procedure of expression;

Fig. 8 is expression be shaped on the floor cutaway view of the state when heaving portion of deep drawing processing;

Fig. 9 is expression from the be shaped cutaway view of the state when beginning to be shaped reinforced rib portion before being near completion of the portion of heaving; And

Figure 10 is that the expression portion of heaving is shaped and the cutaway view of the state of reinforced rib portion when being shaped end.

The specific embodiment

Below referring to figs. 1 through Figure 10 one embodiment of the invention is described.

Fig. 1 illustrates the body structure of lower vehicle side.Fig. 2 illustrates the floor (floor panel, or title base plate) of front chair below.Fig. 3 is illustrated in the structure that this below, floor contains Fuel Tank.Fig. 4 and Fig. 5 illustrate the cross section of the each several part of this structure respectively.

In Fig. 1 to Fig. 3,1 expression is configured in the outermost of overall width direction both sides, a pair of longeron (side sill) down of formation vehicle body 2 skeletons.3 expressions are configured in a pair of longeron of above-mentioned a pair of longeron down 1 inboard and close vehicle body central authorities.This longeron (side rail) the 3rd, an example of longeron among the present invention.And longeron 1, longeron 3 extend along the vehicle body fore-and-aft direction down for these.

Between a pair of following

longeron

1,1, instrument carrier panel 5, preceding floor 6, floor 7, back have been set up successively from the forward position of vehicle body 2.Preceding floor 6 is examples on floor among the present invention.Center on and form car chamber 8 by this instrument carrier panel 5, each floor 6,7.A pair of

longeron

3,3 extends upward in the vehicle body front and back along the lower surface on each floor 6,7.This a pair of

longeron

3,3 supports each

floor

6,7 from downside.

The central authorities of plate 6 previously, about be provided with for example front chair such as operator's saddle and front passenger's seat 10 independently.Back floor 7 is provided with the back seat 11 of swinging seat chair form.Like this, in car chamber 8, dispose number row seat along fore-and-aft direction.In addition, in the present embodiment, enumerated the situation that disposes two rows.To shown in Figure 5, in the space of the front chair of plate 6 below, be formed with the portion of heaving 15 that occupies this space and swell upward as Fig. 2 previously.In addition, below the floor of front chair 10, dispose Fuel Tank 12.And, contain the top of this Fuel Tank 12 in the inside of the portion of heaving 15.Heave in the portion 15 at this, consider the accommodating property of Fuel Tank 12, the rigidity on preceding floor 6, and make the central authorities of the ground plate portion 6a below the front chair swell greatlyyer than other parts.

Particularly, for example Fig. 2 heaves portion 15 and comprises the bump 16a of the central authorities of ground plate portion 6a along the elongated protuberance of overall width direction to shown in Figure 5.Bump 16a forms by deep drawing.In addition, heave portion 15 and also have the 16b of floor tunnel portion (floor tunnelunit).The 16b of floor tunnel portion forms: with the vehicle body direction is benchmark, bulges into tunnel-like from the rear part edge of position to the ground plate portion 6a of the rear portion central authorities that are equivalent to bump 16a along the vehicle body fore-and-aft direction.Heave portion 15 at least 6 the place aheads, distance floor and about the position of edge part predetermined distance form.Heave portion 15 and have the size that to accommodate Fuel Tank 12 tops.Around bump 16a and the 16b of floor tunnel portion, leave smooth ground plate portion 17.That is, heaving portion 15 forms by deep drawing: from leaving smooth ground plate portion 17 between the base portion 15b of the portion of heaving 15 between the base portion 15b of front edge portion to the portion of heaving 15 on floor 6 and from the overall width direction both sides of the edge portion on floor 6.And the portion of heaving 15 each flange part on every side that is formed by ground plate portion 17 constitutes the part that can engage with original skeleton part of vehicle body, fix respectively.Each flange portion is: smooth plate portion 17a from being front portion to the front edge portion on preceding floor 6 of the bump 16a of benchmark with the vehicle body direction for example, is used to place the pin that is sitting in the passenger on the front chair; Smooth plate portion 17b, from the sidepiece of the overall width direction both sides of bump 16a to following longeron 1 as the overall width direction two edges portion on preceding floor 6; And smooth plate portion 17c, surround by the rear portion of bump 16a and the sidepiece of the 16b of floor tunnel portion, be used to place the pin that is sitting in the passenger on the back seat.These are equivalent to an example of flange of the present invention portion.In addition, on each plate portion 17a～17c, be formed with the various elongated reinforced rib 18a～18c of portion that are used to strengthen by reinforced rib.Can improve the rigidity of each plate portion 17a～17c by the 18a～18c of this reinforced rib portion.

The 18a of reinforced rib portion～18c uses the manufacturing procedure shaping identical with the portion of heaving 15.Especially for the shaping of the forward 18a of reinforced rib portion, use the manufacturing procedure of having considered the forward corner part X that can well form Fig. 6 portion of heaving 15 extremely shown in Figure 10.This is because be positioned at the finished parts outside owing to heave the anti-drawn grain of the forward corner part X of portion 15, so be easy to generate wrinkle.In this manufacturing procedure, make with the following method: form before the portion of heaving 15 closes to an end being shaped, begin to carry out the shaping of the 18a of reinforced rib portion with deep drawing.The characteristics of this method are: in deep drawing is shaped, be not from depending on the state that material moves, begin to carry out reinforced rib and be shaped but becoming before closing to an end from shaping only depends on the state of the shaping that material prolongs.

Example to the deep drawing building mortion that uses in this manufacturing procedure describes below.Among Fig. 6 b 20 represents liftable holding pad (blank holder).These holding pad 20 upper surfaces have and are used for the smooth 20a of mounting portion of loading plate shape floor 6 single-pieces.Peristome 21 is the peristomes that form in these holding pad 20 central authorities.Peristome 21 constitutes: the zone from the front portion of the closure of the portion of heaving 15 that should be shaped to the rear end on the preceding floor 6 of the 16b of the floor tunnel portion that will be shaped that comprises the 18c of reinforced rib portion is open.Peristome 21 for example uses the position that is impaled by the open file of the line of the single-point among Fig. 6 a S to illustrate.

Dispose the liftable patrix 23 of an example that is equivalent to mould among the present invention (die is specially the deep drawing mould) at the upside of holding pad 20.On this patrix 23, be formed with the forming face 26 (forming face of the 18a of reinforced rib portion only is shown among the figure) and the forming face 27 of smooth forming face 25, spill.Smooth forming face 25 is to be used to the portion of heaving 15, the 18a～18c of reinforced rib portion forming face in addition, promptly is used for shaping plate part 17a～17c.The forming face 26 of the spill 18a～18c of reinforced rib portion that is used to be shaped.The forming face 27 of spill is used for being shaped and heaves portion 15, bump 16a and the 16b of floor tunnel portion.In addition, patrix 23 for example carries out the lifting driving by the lifting mechanism 28 of deep drawing shaping usefulness.At the downside of holding pad 20, but be provided with the counterdie drift 29 of opening portion 21 this sizes.Counterdie drift 29 is examples of drift among the present invention.On counterdie drift 29, be formed with convex forming face 30 and the convex forming face (not shown) of the 18c of reinforced rib portion that is used to be shaped.Cooperate with spill forming face 27 by convex forming face 30, thus shaping bump 16a and the 16b of floor tunnel portion.

In addition, in the 20a of mounting portion of holding pad 20, with the mounting surface of forming face 26 cooresponding each several parts on can contain the floating punch 31 (figure only illustrates the part of the shaping reinforced rib 18a of portion) of the reinforced rib that is used for being shaped respectively highlightedly.Each floating punch 31 all has convex forming face 31a on top.Forming face 31a cooperates with forming face 26.These each floating punch 31 are connected in the device that drift restrictions 32 grades for example are used to control this floating punch 31.Each floating punch 31 remains the state that is housed in the holding pad 20 usually by this drift control part 32.And, before the shaping of the portion of heaving 15 closes to an end, move when depending on the time that shaped state that material prolongs moves from material when the shaping that becomes the portion of heaving 15, only limit the posture of floating punch 31.That is, when becoming the time that the direction of shaping moves to being extended by material, by holding pad 20 that descends and the relative displacement that rests on the floating punch 31 on the assigned position, the forming face 31a of floating punch 31 is outstanding from the mounting surface of holding pad 20.

Utilize this deep drawing building mortion that following operation is implemented on the preceding floor 6 on the holding pad 20 successively: the operation that keeps with binder Figure 20 and patrix 23; Utilize counterdie drift 29, be formed in to be shaped on this maintained floor 6 by deep drawing and heave the operation of portion 15; And when this shaping of heaving portion 15 closes to an end, with the operation of floating punch 31 the shaping reinforced rib 18a of portion, 18b on floor 6.By this manufacturing procedure, can prevent that the portion of heaving 15 from producing wrinkle at corner part X, and together be shaped with the 18a of reinforced rib portion, 18b.

With reference to Fig. 6 to Figure 10 this job operation is described.At first, shown in Fig. 6 b, utilize the action of deep drawing building mortion, under patrix 23 and counterdie drift 29 opened state, mounting is as the preceding floor 6 of tabular of the material (blank) that is formed on holding pad 20.Should be fixed on the desired location on preceding floor 6.Then, shown in the arrow among Fig. 6 b and Fig. 7, utilize the action of lifting mechanism 28 to make patrix 23 begin to descend.Because this patrix 23 descends, at first, the preceding floor 6 on the holding pad 20 is clamped between the 20a of mounting portion of the smooth forming face 25 of patrix 23 and holding pad 20 (being equivalent to first step among the present invention).Then, patrix 23 descends with holding pad 20 under the state on the preceding floor 6 of clamping.So as shown in Figure 8, counterdie drift 29 begins to enter the formingspace of patrix 23.And, utilize the combined action of the forming face 30 of the forming face 27 of patrix 23 and counterdie drift 29, being shaped by deep drawing makes the plate portion protuberance of preceding floor 6 central authorities.That is, the central authorities of plate 6 implement the deep drawing shaping previously.Be shaped by this, the front portion that is the close-shaped portion of heaving 15 is along with moving from the two material of the place ahead of the portion of heaving 15 and the left and right sides, by pull and stretch established practice setting shape.And the rear portion of the portion of heaving 15 that is opening shape is along with the material from the left and right sides moves by pull and stretch established practice setting shape.By this pull and stretch, previously the central authorities of plate 6 be formed with the upper portion size that can accommodate Fuel Tank 12 the portion of heaving 15, be bump 16a and the 16b of floor tunnel portion (being equivalent to second step of the present invention).

When this deep drawing be shaped proceed to close to an end before the time, from the shaped state that moves along with material to not moving and only utilize and prolong the state that forms and move with material.Before this shaping closed to an end, for example, when reaching the reinforced rib height, as Fig. 9 and shown in Figure 10, each floating punch 31 that will take in by drift control part 32 was limited on the assigned position.Thus, floating punch 31 begins to give prominence to from the reinforced rib height.And the forming face 31a by outstanding floating punch 31 implements reinforced rib portion to the plane plate portion on the 20a of mounting portion and is shaped (being equivalent to third step of the present invention).

At this, before the shaping of the portion of heaving 15 that closes to an end, the deep drawing shaping of carrying out with counterdie drift 29 is not to depend on material to move, but depends on material prolongation carrying out drawing and forming.Therefore, even utilize floating punch 31 to begin to hinder the reinforced rib shaping that material moves, not be shaped by this reinforced rib influences, and proceeds the shaping of the portion of heaving 15.

Thus, when the portion of heaving 15 is shaped when finishing, can be formed with corner part X does not simultaneously have the good 18a of reinforced rib portion of the portion of heaving 15 with good appearance of wrinkle and profile, the preceding floor 6 of 18b.In addition, the 18c of reinforced rib portion of the close 16b of floor tunnel portion that opens is shaped by the action of counterdie drift 29.

That is, the 18a of reinforced rib portion, 18b have suppressed to produce wrinkle in the portion of heaving 15, and use the operation identical with the manufacturing procedure of the portion of heaving 15 to be shaped.

On the other hand, as shown in Figures 2 and 3, a pair of longeron 3 is configured to: pass through under the left and right plane shape plate portion 17b that clips the portion of heaving 15.At this moment, the spacing of the vehicle fore-and-aft direction rear side 3a of longeron 3 is by the overall width decision of body tail.And the spacing of vehicle fore-and-aft direction front side 3b is by front-wheel (not shown) determining positions.For guarantee crash survivability in its restriction, the centre portion 3c of the longeron 3 that passes through below car chamber 8 is preferably formed the degree of dip near rectilinear form.

At this, the centre portion 3c of longeron 3 is configured to: pass through below the plate portion 17b of the overall width direction both sides of the portion of heaving 15.As Fig. 2 to shown in Figure 4, these each centre portions 3c with other ground plate portions for example by welded joint in plate portion 17b.Particularly, be base portion 15b or its peripheral flat that is engaged in bump 16a or heaves portion 15.That is, support the integral body of the overall width direction both sides on preceding floor 6 with a pair of longeron 3.Especially the joint of plate portion 17b and centre portion 3c, make centre portion 3c approach the good straight shape of crash survivability, and make the degree of dip of longitudinal wall 15a of the portion of heaving 15 that is shaped by deep drawing mild, the burden that is shaped for the deep drawing that alleviates the portion of heaving 15, as shown in Figure 4, bump 16a or heave the base portion 15b of portion 15 or the overall width direction of its periphery and centre portion 3c outside edge part 4 engage.

As Fig. 3 and shown in Figure 5, remaining bump 16a or the plate portion 17a that heaves portion 15 the place aheads support by being installed in a pair of crossbeam 33a, 33b between the

longeron

1,1 down.At this moment, this crossbeam passes through between through

centre portion

3c, 3c as a pair of

longeron

3,3 of skeleton part below this plate portion 17a, thereby supports.Particularly, plate portion 17a is supported by crossbeam 33a, the 33b along the front edge portion configuration on the base portion of the forward longitudinal wall 15c of bump 16a and preceding floor 6 respectively.The plate portion 17c that heaves after the leaning on of portion 15 supports by being installed in a pair of crossbeam 34 between the

longeron

1,1 down too, this crossbeam 34 through the skeleton part below this plate portion 17c, be to pass through between centre portion 3c, the 3c of a pair of longeron 3.Particularly, plate portion 17c is supported by the crossbeam 34 (side only is shown among the figure) along the rearward end configuration on the base portion of the longitudinal wall 15d of bump 16a rear side and preceding floor 6 respectively.That is, also well word shape is installed in crossbeam 33a, 33b on the longeron 3, skeleton parts such as 34 support with the rigidity of abundance by being in the front and back of heaving portion 15.

Like this, previously on the plate 6, adopt a kind of in the structure of accommodating the smooth plate portion 17a～17c that is formed for fixing around the portion of heaving 15 that Fuel Tank uses.Thus, by fixing vehicle body 2 original skeleton parts on plate portion 17a～17c, thereby can fully guarantee rigidity around the portion of heaving 15.

Therefore, with simple structure and do not need to increase in addition strengthening part and just can strengthen to preceding floor 6 with the portion of heaving 15.And, on the plate portion 17b of the overall width direction both sides of the portion of heaving 15, engage existing longeron 3, so can maximally utilise the rigidity intensity that longeron 3 brings preceding floor 6 is strengthened.This reinforcement is particularly suitable for lilliput car, and this vehicle can not strengthen the width on preceding floor 6 owing to the dimensional restriction of overall width direction, and shorter to the distance of following longeron 1 from Fuel Tank 12, thereby is difficult to increase strengthening part.And, fixing for longeron 3, owing to adopt edge part 4 with these longeron 3 outsides to be engaged in the base portion 15b of overall width direction both sides of the portion of heaving 15 among the plate portion 17b or the structure of its peripheral part, so the approaching straight shape of the centre portion 3c of longeron 3.Therefore, also can realize the raising of vehicle collision safety.Simultaneously, because the gradient that deep drawing is shaped is mild, so can alleviate the burden that the portion of heaving 15 is shaped and is brought by deep drawing.

And by forming the reinforced rib 18a of portion, thereby the plate portion 17a that heaves between the leading section on portion 15 and preceding floor 6 can guarantee enough rigidity.And the 18a of this reinforced rib portion manufacturing procedure shaping that is shaped identical with the deep drawing of the portion of heaving 15 that is shaped is so reduced machining period number and tooling cost.Especially heave in the manufacturing procedure of portion 15 and the 18a of reinforced rib portion in processing, begin the operation that reinforced rib is shaped owing to utilized before the deep drawing shaping of the portion of heaving 15 closes to an end, so can not destroy the balance that material flows.Therefore, the corner part X that can prevent in the portion's of heaving 15 closed side produces wrinkle, and the portion of heaving 15, the 18a of reinforced rib portion well can be shaped simultaneously.

In addition, the present invention is not limited to the foregoing description, can carry out various distortion without departing from the spirit and scope of the present invention.For example having enumerated the portion of heaving of the part of opening that forms anterior closure, rear portion in the above-described embodiments, but be not limited thereto, also can be all closed portion of heaving of front and rear.And in the above-described embodiments, the job operation on shaping floor is illustrated to descending by patrix, but makes patrix opposite with the mo(u)ld bottom half mould according to technology and appointed condition etc., and floor certainly also can similarly be shaped.

The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc. and all should be included within protection scope of the present invention.

Claims

1. body structure has:

Floor (6) is provided with front chair; And

Fuel Tank (12) is configured in the downside of the ground plate portion that is provided with described front chair;

It is characterized in that:

Described floor (6) comprising:

Heave portion (15), be used to accommodate the top of described Fuel Tank (12), the position that is provided with front chair by described floor (6) utilizes the deep drawing shaping that it is formed to indoor the heaving of car, and reserves plane ground plate portion (17) from the edge part of vehicle front edge portion and overall width direction both sides at least; And

Flange part (17a～17c), form by described portion (15) the described ground plate portion (17) on every side of heaving, and can be fixed on the skeleton part of vehicle.

2. body structure according to claim 1 is characterized in that:

At least the plane ground plate portion (17) between the described front edge portion of heaving portion (15) and described floor (6) has the reinforced rib portion (18) that strengthens usefulness;

Described reinforced rib portion (18) is shaped in the described manufacturing procedure of heaving portion (15) that is used for being shaped.

3. body structure according to claim 2 is characterized in that:

Described manufacturing procedure comprises:

First step utilizes mould (23) and the described floor of holding pad (20) clamping (6);

Second step is utilized drift (29) to go up in described floor (6) and is implemented the deep drawing shaping, thereby is shaped the described portion (15) of heaving; And

Third step before closing to an end from described shaping of heaving portion (15), utilizes floating punch (31) to go up the described reinforced rib portion (18) that is shaped in described floor (6).

4. body structure according to claim 1 is characterized in that:

Downside in described floor (6) disposes a pair of longeron (3) that extends along the vehicle fore-and-aft direction, and this longeron (3) is through clipping the described flange part of heaving the overall width direction both sides of portion (15) (17a～17c);

(base portion of 17a～17c) or its peripheral part are engaged in described longeron (3) with other ground plate portions (17) to described flange part.

5. body structure according to claim 4 is characterized in that: (base portion of 17a～17c) or its peripheral part engage the edge part in the overall width direction outside that described longeron (3) is arranged at described flange part.