JP2019043425A - Vehicle superstructure - Google Patents

Abstract

A vehicle upper structure capable of preventing separation of a welded portion between a roof reinforcement and a roof gusset and suppressing deformation of a pillar toward a passenger compartment. An inclined seat surface 34F is formed in a recess 34B on a roof side rail 16 side of a joint portion 37A of a roof gusset 34 so as to stand up with respect to a weld line T formed by connecting a plurality of weld portions 50 and 51. The inclined seat surface 32F formed on the roof R / F (roof reinforcement) 32 overlaps with the inclined seat surface 34F and is spot-welded (welded portion 52). Thereby, when the roof gusset 34 is deformed along with the deformation of the center pillar 24 at the side collision of the vehicle 10, a part of the peeling load acting on the welded portion 52 is converted into a shear load. As a result, the peeling load acting on the welded portion 52 is reduced, peeling rupture of the roof gusset 34 is suppressed, and deformation of the center pillar 24 in the direction of the vehicle compartment 15 is suppressed. [Selection] Figure 2

Description

  The present invention relates to a vehicle superstructure.

  Patent Document 1 below discloses a technique related to a vehicle upper structure in which a roof reinforcement is disposed along the vehicle width direction on the lower surface side of a roof panel. Pillars are respectively extended along the vehicle vertical direction on both sides of the vehicle. At the upper end of each pillar, the roof panel is disposed outside the vehicle width direction and extends along the vehicle longitudinal direction. Roof side rails are joined.

  Further, a roof gusset extends inward in the vehicle width direction on the inner side of the vehicle width direction of the roof panel, and roof reinforcement is spot welded along the vehicle width direction to the roof gusset. Yes. For this reason, at the time of side collision of the vehicle (hereinafter referred to as “vehicle side collision”), the collision load input to the pillar is transmitted to the roof reinforcement via the roof side rail and the roof gusset.

JP, 2006-002840, A

  However, in the above prior art, the roof reinforcement is spot-welded to the roof gusset at the welded portion, and therefore, when the vehicle collides, a peeling load is input to the welded portion due to the collision load input to the pillar. When the welded part is peeled off, the pillar may be greatly deformed in the direction of the passenger compartment.

  In view of the above-described facts, an object of the present invention is to obtain a vehicle upper structure that can prevent peeling of a welded portion between a roof reinforcement and a roof gusset and suppress deformation of a pillar toward a passenger compartment.

  The vehicle upper structure according to the first aspect of the present invention is provided at the upper ends of a pair of pillars extending along the vehicle vertical direction on both sides of the vehicle, respectively, and toward the inner side in the vehicle width direction. A pair of extended roof gussets and spots at a plurality of first welds extending in the vehicle width direction and extending along the vehicle width direction with respect to the pair of roof gussets along the vehicle width direction. Welded roof reinforcement, formed on the roof gusset, provided on the outer side of the plurality of first welds along the vehicle width direction, and connected to the weld lines connecting the plurality of first welds A first seat surface standing upright and a second seat surface formed at both ends of the roof reinforcement in the vehicle width direction and overlapped with the first seat surface and spot welded by a second welded portion. Yes.

  In the vehicle upper structure according to the first aspect of the present invention, the pillars are respectively extended along the vehicle vertical direction on both sides of the vehicle. Roof gussets are respectively provided at the upper ends of the pillars, and each roof gusset extends toward the inside in the vehicle width direction. On the other hand, the roof reinforcement extends along the vehicle width direction, and the roof reinforcement is spot-welded to each roof gusset by a plurality of first welds provided along the vehicle width direction. ing.

  Here, the roof gusset is formed with a first seat surface that stands up with respect to a welding line that connects the plurality of first welds, and the first seat is provided at both ends of the roof reinforcement in the vehicle width direction. The 2nd bearing surface which overlaps a surface is formed, and the 1st bearing surface and the 2nd bearing surface are spot-welded by the 2nd welding part.

  On the other hand, when a side collision load is input to the pillar during a side collision of the vehicle, the upper part of the pillar is deformed in the direction of the passenger compartment starting from the upper end of the pillar, and the upper end of the pillar is lower in the vehicle vertical direction. Displace to the side. Then, following the deformation of the pillar, the roof gusset is deformed toward the vehicle interior side and the lower side in the vehicle vertical direction in the same manner as the pillar.

  As described above, with respect to the roof reinforcement extended along the vehicle width direction, the pillar extends along the vehicle vertical direction. In extreme terms, the roof reinforcement extends along the horizontal direction and the pillars extend along the vertical direction. That is, both are arranged in a substantially orthogonal state.

  For this reason, when the roof gusset is deformed toward the vehicle interior side and downward in the vehicle vertical direction at the time of a side collision of the vehicle, a peeling load mainly acts on the first welded portion of the roof gusset.

  Based on this point, in the present invention, the roof gusset is formed with a first seat surface that stands up with respect to the welding line connecting the plurality of first welds, and at both ends in the vehicle width direction of the roof reinforcement, A second seat surface that overlaps the first seat surface is formed. That is, the first seat surface and the second seat surface are formed upright with respect to the weld line (formed to intersect the weld line).

  Thereby, when the roof gusset is deformed along with the deformation of the pillar at the time of a side collision of the vehicle, a part of the peeling load acting on the weld line can be converted into a shear load. As a result, the peeling load acting on the second welded portion is reduced, the peeling rupture of the roof gusset can be suppressed, and the deformation of the pillar in the direction of the passenger compartment can be suppressed. Here, the “seat surface” refers to a surface on which a weld by spot welding is provided.

  The vehicle upper structure according to a second aspect of the present invention is the vehicle upper structure according to the first aspect of the present invention, wherein the roof gusset has a cross-sectional shape cut along the vehicle front-rear direction so that the vehicle upper structure Concavities and convexities configured to include a first convex portion protruding toward the side, a first concave portion recessed toward the vehicle lower side, and a first side wall connecting between the first convex portion and the first concave portion. The first seating surface is formed in the first recess.

  In the vehicle upper structure according to the second aspect of the present invention, the roof gusset has a concave-convex cross-sectional shape cut along the vehicle front-rear direction. For this reason, compared with the case where a roof gusset is formed in flat form, the rigidity of the said roof gusset itself can be made high.

  Here, the roof gusset includes a first convex portion that protrudes toward the vehicle upper side, a first concave portion that is recessed toward the vehicle lower side, and a first side wall that connects the first convex portion and the first concave portion. , And the first seating surface is formed in the first recess.

  A vehicle upper structure according to a third aspect of the present invention is the vehicle upper structure according to the second aspect of the present invention, wherein the first ridge line is formed along the vehicle width direction between the first side wall and the first recess. The first seating surface is formed at a position spaced from the first ridgeline.

  In the vehicle upper structure according to the third aspect of the present invention, the first ridgeline is formed along the vehicle width direction by the first side wall and the first recess of the roof gusset. Thereby, compared with the case where the 1st ridgeline is not formed, the buckling load improves in the said roof gusset.

  For this reason, in this invention, the buckling load in the said roof gusset is ensured by forming a 1st seat surface in the position spaced apart from the 1st ridgeline in the roof gusset.

  A vehicle upper structure according to a fourth aspect of the present invention is the vehicle upper structure according to the second or third aspect of the present invention, wherein the roof reinforcement is a cross-section cut along the longitudinal direction of the vehicle. A second convex portion whose shape protrudes toward the upper side of the vehicle and overlaps the first convex portion, a second concave portion that is recessed toward the lower side of the vehicle and overlaps the first concave portion, the second convex portion and the second The concave and convex shape is configured to include a second side wall connecting the concave portions, and the second seat surface is formed in the second concave portion.

  In the vehicle upper structure according to the fourth aspect of the present invention, the roof reinforcement has a concavo-convex cross-sectional shape cut along the vehicle front-rear direction. For this reason, compared with the case where roof reinforcement is formed in flat form, the rigidity of the said roof reinforcement itself can be made high.

  Here, the roof reinforcement includes a second convex portion projecting toward the vehicle upper side, a second concave portion recessed toward the vehicle lower side, and a second side wall connecting the second convex portion and the second concave portion. The second seating surface is formed in the second recess.

  A vehicle upper structure according to a fifth aspect of the present invention is the vehicle upper structure according to the fourth aspect of the present invention, wherein the second ridgeline is formed along the vehicle width direction between the second side wall and the second recess. The second seating surface is formed at a position spaced from the second ridgeline.

  In the vehicle upper structure according to the fifth aspect of the present invention, the second ridgeline is formed along the vehicle width direction by the second side wall and the second recess of the roof reinforcement. Thereby, compared with the case where the 2nd ridgeline is not formed, buckling load improves in the said roof reinforcement.

  For this reason, in this invention, the buckling load in the said roof reinforcement will be ensured by forming a 2nd bearing surface in the position spaced apart from the 2nd ridgeline in roof reinforcement.

  As described above, the vehicle upper structure according to claim 1 is excellent in that it can prevent peeling of the welded portion between the roof reinforcement and the roof gusset, and can suppress deformation of the pillar in the direction of the passenger compartment. Has an effect.

  The vehicle upper structure according to claim 2 has an excellent effect that the rigidity of the roof gusset itself can be increased as compared with the case where the roof gusset is formed in a flat plate shape.

  The vehicle upper structure according to claim 3 has an excellent effect that the buckling load in the roof gusset can be secured.

  The vehicle upper structure according to claim 4 has an excellent effect that the rigidity of the roof reinforcement itself can be increased as compared with the case where the roof reinforcement is formed in a flat plate shape.

  The vehicle upper structure according to claim 5 has an excellent effect that the buckling load in the roof reinforcement can be secured.

1 is a perspective view showing a vehicle upper portion to which a vehicle upper structure according to the present embodiment is applied. It is sectional drawing when cut | disconnecting by the AA line of FIG. 1 which shows the state before a side collision load is input. It is sectional drawing when cut | disconnecting by the AA of FIG. 1 which shows a state when a side collision load is input. It is the principal part expansion perspective view which expanded the principal part of the vehicle superstructure which concerns on this embodiment seeing from the vehicle outer side diagonally forward and diagonally upward side. It is the principal part expansion perspective view which expanded the principal part of the vehicle superstructure which concerns on this embodiment seeing from the vehicle outer side and diagonally upward side. It is a graph which shows the relationship between material tensile strength, spot shear strength, and peel strength. (A) is a perspective view which shows a part of principal part of the vehicle upper structure which concerns on this embodiment, (B) is a perspective view which shows the modification of (A). (A), (B) is a perspective view which shows the modification corresponding to FIG. 7 (A), (B), respectively. It is a perspective view corresponding to FIG. 4 which shows a comparative example. It is sectional drawing corresponding to FIG. 2 which shows a comparative example. It is sectional drawing corresponding to FIG. 3 which shows a comparative example.

  Hereinafter, a vehicle upper structure according to a first embodiment of the present invention will be described with reference to the drawings. Note that an arrow FR that is appropriately shown in each drawing indicates the vehicle front side, an arrow UP indicates the vehicle upper side, and an arrow OUT indicates the vehicle width direction outer side. Further, in the following description, when using the front / rear, up / down, and left / right directions, the front / rear direction of the vehicle, the up / down direction of the vehicle up / down direction, and the left / right direction in the traveling direction are indicated.

(Overall structure of vehicle superstructure)
As shown in FIG. 1, a roof panel 14 is provided on a vehicle upper portion 12 of a vehicle 10 to which the vehicle upper structure according to the present embodiment is applied. In addition, roof side rails 16 extending along the vehicle front-rear direction are provided.

  A front header 18 is bridged between the front end portions of the pair of roof side rails 16 along the vehicle width direction, and a rear header 20 is bridged between the rear end portions of the roof side rails 16 along the vehicle width direction. Has been. Further, a front pillar 22 extends from the front end portion of the roof side rail 16 toward the vehicle front side and the vehicle lower side, and from the vehicle front-rear direction center portion of the roof side rail 16 toward the vehicle lower side. A center pillar (pillar) 24 is extended. Further, a rear pillar 26 extends from the rear end portion of the roof side rail 16 toward the vehicle rear side and the vehicle lower side.

  The lower end portion of the front pillar 22, the lower end portion of the center pillar 24, and the lower end portion of the rear pillar 26 are joined to a rocker (not shown) extending along the vehicle longitudinal direction by spot welding, laser welding, or the like. Hereinafter, in this “joining”, unless otherwise explained, joining is performed by spot welding, laser welding, or the like.

  The rocker, the front pillar 22, the roof side rail 16, and the center pillar 24 form a substantially rectangular front side door opening 28 in a side view of the vehicle. A rear side door opening 30 that is substantially rectangular in a side view of the vehicle is formed by the rocker, the center pillar 24, the roof side rail 16, and the rear pillar 26 at the rear of the front side door opening 28 in the vehicle. The front side door opening 28 and the rear side door opening 30 are closed by a front side door and a rear side door (not shown), so that the inside and outside of the vehicle can be opened and closed.

(Configuration of each member at the top of the vehicle)
As shown in FIG. 1, the roof panel 14 is made of a metal such as a steel plate and has a substantially rectangular shape in plan view. As shown in FIG. 2, the roof panel 14 has a cross-sectional shape when it is cut along the vehicle width direction so that it gently bulges in a convex shape toward the vehicle upper side. 15 is provided from the upper side of the vehicle, and a main body portion 14A forming a design portion of the vehicle upper portion 12 is provided. Further, outer flanges 14B projecting outward in the vehicle width direction are formed at both ends of the main body portion 14A in the vehicle width direction.

  On the other hand, the roof side rail 16 is formed of a metal such as a steel plate, and a roof side rail outer panel (hereinafter referred to as “side rail outer”) 36 constituting an outer plate of the roof side rail 16, and the roof side rail 16. And a roof side rail inner panel (hereinafter referred to as “side rail inner”) 38 constituting the inner plate.

  The side rail outer 36 has a cross-sectional shape when cut along the vehicle width direction, and is formed in a substantially hat shape with the inside of the vehicle compartment 15 opened, on the upper end side of the main body 36A and the main body 36A. It includes a flange portion 36B provided and 36C provided on the lower end side of the main body portion 36A.

  The side rail inner 38 includes a main body portion 38A that forms a closed section 40 with the main body portion 36A of the side rail outer 36, and a flange portion 38B is provided on the upper end side of the main body portion 38A. A flange portion 38C is provided on the lower end side of the main body portion 38A.

  Further, the center pillar 24 is formed of a metal such as a steel plate, and includes a pillar outer panel 42 disposed outside the vehicle compartment 15 and a pillar inner panel 44 disposed inside the vehicle compartment 15. Has been.

  The upper end portion 42A of the pillar outer panel 42 is joined to the outside of the main body portion 36A of the side rail outer 36, and the upper end portion 44A of the pillar inner panel 44 is a closed cross-section portion 40 of the main body portion 38A of the side rail inner 38. It is joined to the side. That is, the roof side rail 16 is joined to the upper end portion 44 </ b> A of the pillar inner panel 44.

  A side outer panel 46 is provided outside the roof side rail 16 in the vehicle width direction. The side outer panel 46 includes a main body portion 46A that forms a design portion of the vehicle side portion 13, and an inner flange that protrudes inward in the vehicle width direction at an inner end portion in the vehicle width direction of the main body portion 46A. 46B is formed.

  Then, the outer flange 14B of the roof panel 14 is placed on these plate materials in a state where the inner flange 46B of the side outer panel 46, the flange portion 36B of the side rail outer 36, and the flange portion 38B of the side rail inner 38 are overlapped, These plate members including the outer flange 14B of the roof panel 14 are joined to each other by a mastic adhesive or the like (joint portion 48).

(Main parts of the vehicle superstructure)
In this embodiment, as shown in FIG. 2, a roof reinforcement 32 (hereinafter referred to as “roof R”) is provided between the roof side rails 16 as a reinforcing member of the roof panel 14 on the lower surface 14 </ b> C side of the roof panel 14. / F32 ”) is extended along the vehicle width direction.

  On the other hand, the main body portion 38A of the side rail inner 38 joined to the upper end portion 44A of the pillar inner panel 44 of each center pillar 24 has a substantially rectangular shape in plan view as shown in FIG. The outer end portions 35 of the roof gussets 34 disposed along are joined together.

  That is, as shown in FIG. 2, a roof gusset 34 is provided at the upper end portion 24 </ b> A of the center pillar 24, and a joint portion located inside the main body portion 37 of the roof gusset 34 along the vehicle width direction. End portions 33 at both ends of the roof R / F 32 in the vehicle width direction are joined to 37A (described later). Thereby, roof R / F32 is arrange | positioned along the vehicle width direction.

  Since the roof gussets 34 are provided on both sides in the vehicle width direction and are the same on the left and right sides, one end side in the vehicle width direction will be described in the following description.

<Roof Gusset>
The roof gusset 34 shown in FIGS. 1 and 2 is formed of a metal such as a steel plate, for example. The main body portion 37 of the roof gusset 34 is formed along the vehicle width direction, and the outer end portion 35 of the roof gusset 34 is inclined downward as it goes outward in the vehicle width direction. As shown in FIG. 4, the main body 38A of the side rail inner 38 is joined.

  As shown in FIGS. 4 and 5, the roof gusset 34 has a concavo-convex cross section cut along the vehicle front-rear direction. In addition, in FIG. 4, illustration of the welding parts 50, 51, and 52 mentioned later is abbreviate | omitted.

  Here, the shape of the roof gusset 34 will be specifically described. For example, at the center of the roof gusset 34 along the vehicle front-rear direction, a convex portion (first convex portion) 34A that protrudes toward the vehicle upper side is provided. It has been. And the recessed part (1st recessed part) 34B dented toward the vehicle lower side is each provided in the front-back direction along the vehicle front-back direction of the said convex part 34A, and between the convex part 34A and the recessed part 34B, a side wall ( The first side walls 34C are connected to each other.

  Further, on the front side and the rear side of the concave portion 34B in the vehicle front-rear direction, flange portions (first convex portions) 34D that protrude toward the front side and the rear side are provided. Further, the flange portion 34D and the concave portion 34B are connected by a side wall (first side wall) 34E.

  A ridge line P is formed between the convex portion 34A and the side wall 34C, and between the flange portion 34D and the side wall 34E. A ridge line (first ridge line) Q is formed between the concave portion 34B and the side walls 34C and 34E. Are formed respectively.

  Further, as shown in FIG. 2, the joint portion 37 </ b> A of the main body portion 37 of the roof gusset 34 goes to the vehicle lower side as it goes outward in the vehicle width direction in accordance with the shape of the end portion 33 of the roof R / F 32. It is a gentle curved surface (curve T).

  Then, in the concave portion 34B on the roof side rail 16 side of the joint portion 37A of the roof gusset 34, an inclined seat surface (first surface) that stands up with respect to the curve T and inclines downward toward the roof side rail 16 side. (Face surface) 34F is formed. The inclined seat surface 34F is formed between the ridgeline Q and the ridgeline Q, that is, at a position separated from the ridgeline Q, as shown in FIG.

<Roof R / F>
The roof R / F 32 shown in FIG. 1 is made of a metal such as a steel plate, for example. And roof R / F32 is extended along the vehicle width direction, and the cross-sectional shape cut | disconnected along the vehicle front-back direction is made into uneven | corrugated shape as FIG.4 and FIG.5 shows.

  The shape of the roof R / F 32 will be specifically described. For example, a convex portion (second convex portion) 32A that protrudes toward the vehicle upper side is provided in the center of the roof R / F 32 along the vehicle front-rear direction. It has been. And the recessed part (2nd recessed part) 32B dented toward the vehicle downward side is each provided in the front and back along the vehicle front-back direction of the said convex part 32A, and between the convex part 32A and the recessed part 32B, a side wall ( The second sidewalls 32C are connected to each other.

  In addition, flange portions (second convex portions) 32D that protrude toward the front side and the rear side are provided on the front side and the rear side of the concave portion 32B in the vehicle front-rear direction. Further, the flange portion 32D and the concave portion 32B are connected by a side wall (second side wall) 32E.

  A ridge line R is formed between the convex portion 32A and the side wall 32C, and between the flange portion 32D and the side wall 32E. A ridge line (second ridge line) S is formed between the concave portion 32B and the side walls 32C and 32E. Are formed respectively.

  In addition, as shown in FIG. 2, the recessed portion 32B on the roof side rail 16 side of the end portion 33 of the roof R / F 32 has an inclined seat surface (overlaid on the inclined seat surface 32F formed in the recessed portion 34B of the roof gusset 34). (Second seat surface) 32F is formed. The inclined seat surface 32F is formed between the ridgeline S and the ridgeline S, that is, at a position separated from the ridgeline S, as shown in FIG.

  With the configuration as described above, in this embodiment, as shown in FIGS. 2 and 5, in the joint portion 37 </ b> A of the roof gusset 34, the convex portion 34 </ b> A and the flange portion 34 </ b> D have the convex portion 32 </ b> A of the roof R / F 32. The flange portions 32D overlap each other, and the concave portion 32B of the roof R / F 32 overlaps the concave portion 34B. At this time, the ridge line P of the roof R / F 32 overlaps the ridge line P of the roof gusset 34, and the ridge line S of the roof R / F 32 overlaps the ridge line Q of the roof gusset 34.

  As described above, in the state where the end portion 33 of the roof R / F 32 overlaps the joint portion 37A of the roof gusset 34, the end portion 33 of the roof R / F 32 and the joint portion 37A of the roof gusset 34 extend along the vehicle width direction. The plurality of welds 50, 51, 52 are joined by spot welding.

  Here, the welded portion (second welded portion) 52 is a spot-welded portion in a state where the inclined seat surface 32F of the roof R / F 32 overlaps the inclined seat surface 34F of the roof gusset 34. On the other hand, as shown in FIG. 2, the weld line formed by connecting the welds 50 and 51 (the weld line connecting the plurality of first welds) is the shape (curve T) of the joint 37 </ b> A of the roof gusset 34. It will be formed along. For this reason, in the following description, “curve T” is referred to as “weld line T”. Therefore, the welded portion 52 is not on the weld line T, and the tangent line (inclined seating surface 34F) passing through the welded portion 52 stands up with respect to the weld line T.

(Operation and effect of vehicle superstructure)
Next, functions and effects of the vehicle superstructure according to the present embodiment will be described.

  As shown in FIG. 2, in the present embodiment, in the roof gusset 34, a weld line T formed by connecting a plurality of welds 50 and 51 to the recess 34 </ b> B on the roof side rail 16 side of the joint 37 </ b> A. An inclined seating surface 34F that stands up is formed. Further, in the recess 32B on the roof side rail 16 side of the end portion 33 of the roof R / F 32, an inclined seat surface 32F is formed so as to overlap the inclined seat surface 34F formed on the roof gusset 34, and the inclined seat surface 32F is inclined. Spot-welded to the seat surface 34F (welded portion 52).

  On the other hand, as a comparative example, as shown in FIG. 9, when the inclined seating surface is not formed in the concave portion 100 </ b> A of the joint portion 102 of the roof gusset 100 and the concave portion 104 </ b> A of the end portion 106 of the roof R / F 104. explain.

  In this case, as shown in FIG. 10, the roof R / F 104 is welded to the roof gusset 100 along the vehicle width direction of the roof gusset 100 (welded portions 107, 108, 109). That is, the welded portions 107, 108, and 109 are provided only along the weld line T ′ along the shape of the roof gusset 100.

  Here, when a side collision load (F) is input to the center pillar 112 during a side collision of the vehicle 110, the upper portion of the center pillar 112 is deformed in the direction toward the passenger compartment 114 with the upper end 112A of the center pillar 112 as a starting point. At the same time, the upper end 112A of the center pillar 112 is displaced downward (in the direction of arrow A). Then, as shown in FIG. 11, following the deformation of the center pillar 112, the roof gusset 100 is deformed toward the inside of the passenger compartment 114 and toward the lower side (in the direction of arrow B), like the center pillar 112.

  As described above, the center pillar 112 extends along the vehicle vertical direction with respect to the roof R / F 104 extending along the vehicle width direction. Extremely speaking, the roof R / F 104 extends along the horizontal direction, and the center pillar 112 extends along the vertical direction. That is, both are arranged in a substantially orthogonal state.

  For this reason, when the roof gusset 100 is deformed toward the vehicle interior side and downward in the vehicle vertical direction at the time of a side collision of the vehicle 110, a peeling load is mainly applied to the welded portions 107, 108, 109 of the roof gusset 100. Will act.

  FIG. 6 is a graph showing the relationship between the material tensile strength, the spot shear strength, and the peel strength (Source: Nippon Steel Technical Report No. 385 (September 2006)) Spot welding of high strength steel sheets for automobiles. Than sex). According to this graph, it can be seen that the peel strength of the spot welded portion is low in the material grade having a tensile strength of 600 MPa or more.

  Therefore, in the roof R / F 104 shown in FIG. 11, when a high-tensile material (high-tensile steel plate) having a tensile strength of 590 MPa or 780 MPa is used, the roof gusset 100 may be peeled and broken at the time of a side collision of the vehicle 110. There is. On the other hand, as shown in FIG. 6, the shear strength of the spot welded portion increases as the tensile strength increases.

  In consideration of the above points, in the present embodiment, as shown in FIG. 2, an inclined seat surface 34 </ b> F standing with respect to the weld line T is formed on the roof side rail 16 side of the joint portion 37 </ b> A of the roof gusset 34. An inclined seat surface 32F that overlaps the inclined seat surface 34F is formed at the end 33 of the roof R / F 32. That is, the inclined seat surface 34F and the inclined seat surface 32F are formed upright with respect to the weld line T.

  Thereby, when the roof gusset 34 is deformed along with the deformation of the center pillar 24 as shown in FIG. 3 at the time of a side collision of the vehicle 10, a part of the peeling load acting on the weld line T is sheared. (In the direction of arrow C shown in FIG. 3). As a result, as compared with the case shown in FIG. 10, the peeling load acting on the welded portion 52 is reduced in FIG. 3, and the peeling fracture of the roof gusset 34 can be suppressed.

  Therefore, according to the present embodiment, even when a high-tensile material is used for the roof R / F 32, the center pillar 24 can be prevented from being deformed in the vehicle compartment direction. Note that the roof R / F 32 in this embodiment is not necessarily made of a high-tensile material.

  Further, in the present embodiment, as shown in FIG. 5, the roof gusset 34 has a concave-convex cross-sectional shape cut along the vehicle front-rear direction. For this reason, compared with the case where the roof gusset 34 is formed in flat form, the rigidity of the said roof gusset 34 itself can be made high.

  Further, a ridge line P is formed between the convex portion 34A and the side wall 34C of the roof gusset 34, and a ridge line Q is formed between the concave portion 34B and the side walls 34C, 34E. Thus, by providing the ridge lines P and Q along the vehicle width direction in the roof gusset 34, the roof gusset 34 extends along the vehicle width direction as compared with the case where the ridge lines P and Q are not formed. The buckling load is improved.

  On the other hand, similarly to the roof gusset 34, the cross-sectional shape cut along the vehicle front-rear direction is also an uneven shape in the roof R / F 32. For this reason, compared with the case where roof R / F32 is formed in flat form, the rigidity of the said roof R / F32 itself can be made high. Note that the roof R / F 32 and the roof gusset 34 need only have the required rigidity, and therefore the cross-sectional shape does not necessarily have to be an uneven shape.

  Further, a ridge line R is formed between the convex portion 32A and the side wall 32C of the roof R / F 32, and a ridge line S is formed between the concave portion 32B and the side walls 32C and 32E. For this reason, in the roof R / F 32, the buckling load along the vehicle width direction is improved in the roof R / F 32 as compared with the case where the ridgelines R and S are not formed.

  Then, the roof R / F 32 overlaps the roof gusset 34, whereby the rigidity of both is further improved. At this time, the ridgelines S and R of the roof R / F 32 overlap with the ridgelines P and Q of the roof gusset 34, respectively, so that the rigidity of both is further improved. It is not necessary to overlap the ridgelines P and Q.

  Furthermore, in the present embodiment, the inclined seating surface 34F of the roof gusset 34 is formed at a position separated from the ridgeline Q, whereby the buckling load in the roof gusset 34 is secured. Further, the inclined seating surface 32F of the roof R / F 32 is also formed at a position separated from the ridge line S, like the roof gusset 34. Thereby, the buckling load in roof R / F32 is ensured.

(Supplementary items of this embodiment)
As shown in FIG. 5, in this embodiment, the inclined seat surface 34F is formed in the recess 34B of the roof gusset 34, and the inclined seat surface 32F is formed in the end portion 33 of the roof R / F 32. Since the surface 34F and the inclined seat surface 32F need only overlap each other and can be spot welded, they do not necessarily need to be inclined surfaces and may be curved surfaces.

  5 and 7A, in the present embodiment, the inclined seat surface 32F formed at the end portion 33 of the roof R / F 32 is formed at a position separated from the ridge line S. However, as shown in FIG. 7B, the inclined seating surface 32F is not necessarily separated from the ridge line S.

  In consideration of the buckling load along the vehicle width direction of the roof R / F 32, the inclined seat surface 32F of the roof R / F 32 is formed at a position separated from the ridge line S as shown in FIG. Better. On the other hand, as shown in FIG. 7B, when the inclined seating surface 32F is not separated from the ridgeline S, an advantage that the shape of the roof R / F 32 can be simplified is obtained.

  Further, in the present embodiment, as shown in FIG. 5, the inclined seat surface 34F formed in the recess 34B of the roof gusset 34 is formed at a position separated from the ridgeline Q, but the roof R / F 32 is inclined. Similarly to the seating surface 32F, the inclined seating surface 34F does not necessarily need to be separated from the ridgeline Q.

  Here, FIGS. 7A and 7B and FIGS. 8A and 8B simply show the end portion 33 of the roof R / F 32. As described above, the same can be said about the shapes of the inclined seat surface 34F of the roof gusset 34 and the inclined seat surface 32F of the roof R / F 32. Therefore, in the following description, the inclined seat surface 32F side of the roof R / F 32 is shown as a representative of both, and the description will be made based on this drawing.

  7A and 7B, in the present embodiment, the inclined seat surface 32F of the roof R / F 32 is inclined downward as it goes toward the roof side rail 16 (see FIG. 2). doing. However, the inclined seating surface 32F of the roof R / F 32 only has to be formed upright with respect to the weld line T formed by connecting a plurality of welds 50, as shown in FIG. It is not limited.

  For example, as shown in FIG. 8A, the inclined seat surface 54A of the roof R / F 54 may be formed to be inclined upward as it goes to the roof side rail 16 (see FIG. 2) side. . Also in this case, as shown in FIG. 8B, the inclined seating surface 54A is not necessarily separated from the ridge line S.

  Furthermore, although the welding part applied in the above embodiment is the welding part 52, it is applicable also to the welding part 51 located inside the vehicle width direction of the roof gusset 34. FIG.

  The vehicle upper structure according to the present embodiment has been described above. However, these embodiments may be used in appropriate combination, and may be implemented in various modes without departing from the gist of the present invention. is there.

10 Vehicle 13 Vehicle side portion 24 Center pillar (pillar)
24A Upper end (upper end of pillar)
32 Roof R / F (Roof Reinforcement)
32A Convex part (second convex part, roof reinforcement)
32B recess (second recess, roof reinforcement)
32C side wall (second side wall, roof reinforcement)
32D flange part (second convex part, roof reinforcement)
32E side wall (second side wall, roof reinforcement)
32F Inclined seat (second seat)
33 End (end of roof reinforcement)
34 Roof gusset 34A Convex part (first convex part, roof gusset)
34B Concave (first concave, roof gusset)
34C side wall (first side wall, roof gusset)
34D Flange (first convex part, roof gusset)
34E Side wall (first side wall, roof gusset)
34F Inclined seat (first seat)
50 welds (first weld)
51 Welded part (first welded part)
52 Welded part (second welded part)
54 Roof R / F (Roof Reinforcement)
54A Inclined seat (second seat)
Q ridgeline (first ridgeline)
S ridgeline (second ridgeline)
T welding line

Claims (5)

A pair of roof gussets respectively provided at upper ends of a pair of pillars extending in the vehicle vertical direction on both sides of the vehicle and extending inward in the vehicle width direction;
A roof reinforcement that extends along the vehicle width direction and is spot-welded with a plurality of first welds along the vehicle width direction to the pair of roof gussets at both ends in the vehicle width direction;
With
A first seat surface formed on the roof gusset, provided on the outer side in the vehicle width direction of the plurality of first welds, and standing with respect to a weld line connecting the plurality of first welds;
A second seating surface formed on both ends of the roof reinforcement in the vehicle width direction, overlapped with the first seating surface and spot-welded at a second welding portion;
A vehicle superstructure. The roof gusset includes a first convex portion whose cross-sectional shape cut along the vehicle front-rear direction protrudes toward the vehicle upper side, a first concave portion recessed toward the vehicle lower side, and the first convex portion. A first sidewall that connects between the first recesses, and a concavo-convex shape configured to include,
The vehicle upper structure according to claim 1, wherein the first seating surface is formed in the first recess.   The vehicle according to claim 2, wherein a first ridge line is formed along the vehicle width direction by the first side wall and the first recess, and the first seating surface is formed at a position separated from the first ridge line. Superstructure. The roof reinforcement has a second convex portion whose cross-sectional shape cut along the vehicle longitudinal direction protrudes toward the vehicle upper side and overlaps the first convex portion, and is recessed toward the vehicle lower side. Are formed into a concavo-convex shape including a second concave portion that overlaps, and a second side wall that connects between the second convex portion and the second concave portion,
The vehicle upper structure according to claim 2 or 3, wherein the second seating surface is formed in the second recess.   The vehicle according to claim 4, wherein a second ridge line is formed along the vehicle width direction by the second side wall and the second recess, and the second seating surface is formed at a position separated from the second ridge line. Superstructure.