JP2016002840A - Vehicle superstructure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle superstructure which can improve rigidity while avoiding the burning of a roof panel caused by a permeated beam of a laser at laser welding.SOLUTION: A vehicle superstructure has: roof side rails 16 which are extended along a vehicle fore-and-aft direction at both sides of a vehicle upper part 12 in a vehicle width direction; a gazette 34 which is extended to the inside of the vehicle width direction from the roof side rails 16; a first roof R/F32 in which an end part in the vehicle width direction is joined to an upper face of the gazette 34 by laser welding; a second roof R/F36 which is joined to a region in which the first roof R/F32 and the gazette 34 are overlapped on each other at the upper face of the first roof R/F32, and comprises a bulged part 36B which is bulged to a vehicle upper part in a region which covers a weld part 50 between the gazette 34 and the first roof R/F32; and a roof panel 14 which is arranged at a vehicle upper side of the second roof R/F36 with a clearance 58.

Description

  The present invention relates to a vehicle superstructure.

  In the vehicle upper structure in which the roof reinforcement is disposed on the lower surface side of the roof panel, in Patent Document 1, a roof side bracket (gusset) is provided on the top of the pillar, and the roof reinforcement is spot welded to the roof side bracket. A bonded structure is disclosed. On the other hand, Patent Document 2 discloses a structure in which a gusset and a roof reinforcement are fastened with bolts and nuts, and an upper reinforcement (second roof reinforcement) is joined to the upper surface of the roof reinforcement. The roof panel has been reinforced.

JP 2003-261063 A JP 2008-247189 A

  By the way, when the roof panel is assembled to the vehicle body, it is preferable from the viewpoint of work efficiency that the roof panel and the roof reinforcement are assembled in advance and then joined to the gusset on the vehicle body side. However, since the roof panel and the roof reinforcement form a closed section, when joining by spot welding as in Patent Document 1, processing such as forming an insertion hole for inserting a spot gun is required. In addition, it is conceivable that the rigidity is lowered by forming the insertion hole. Moreover, since it takes time similarly also when it fastens with a volt | bolt and a nut like patent document 2, there exists room for improvement from a viewpoint of improving work efficiency.

  On the other hand, there is a method of welding the roof reinforcement and the gusset by laser welding, but there is a possibility that the roof panel is burned by the transmitted light of the laser. Here, if the configuration having the applision reinforcement as in Patent Document 2 is adopted, the transmitted light of the laser can be shielded, but the joining portion between the gusset and the roof reinforcement, Since the joint portion is separated in the vehicle vertical direction, there is room for improvement in order to further improve the rigidity.

  The present invention has been made in consideration of the above-described facts, and an object of the present invention is to obtain a vehicle superstructure capable of improving rigidity while avoiding that a roof panel is burned by laser transmitted light during laser welding.

  According to a first aspect of the present invention, a vehicle upper structure according to the present invention includes a roof side rail extending along the vehicle front-rear direction on both sides in the vehicle width direction of the upper portion of the vehicle, and extending inward in the vehicle width direction from the roof side rail. A gusset, a first roof reinforcement provided with a vehicle width direction as a longitudinal direction, and an end portion in the vehicle width direction joined to the upper surface of the gusset by laser welding, and the first roof reinforcement on the upper surface of the first roof reinforcement. A second roof provided with a bulging portion that bulges upward in the vehicle at a portion that covers a welded portion between the gusset and the first roof reinforcement while being joined to a portion where one roof reinforcement and the gusset overlap. Reinforcement and a roof pad disposed with a gap on the vehicle upper side of the second roof reinforcement. With Le and, the.

  In the vehicle upper structure according to the first aspect of the present invention, the gusset extends from the roof side rail inward in the vehicle width direction, and the first roof reinforcement is joined to the upper surface of the gusset by laser welding. ing. A second roof reinforcement is joined to the upper surface of the first roof reinforcement. Here, the 2nd roof reinforcement is provided with the bulging part bulged to the vehicle upper part in the part which covers the welding part of a gusset and the 1st roof reinforcement. Thereby, when a laser is irradiated from the vehicle lower side and the gusset and the first roof reinforcement are laser welded, the transmitted light of the laser is shielded (absorbed) by the bulging portion. As a result, it is possible to suppress the transmitted light from reaching the roof panel disposed with a gap on the vehicle upper side of the second roof reinforcement. Further, by laser welding, it is not necessary to form an insertion hole for inserting a spot gun, and a reduction in rigidity can be suppressed. It should be noted that the gap between the second roof reinforcement and the roof panel does not need to be formed over the entire area of the roof panel, and it is sufficient that a gap is formed at least at a site where laser welding is performed. That is, a gap may not be formed between the roof panel and a portion other than the bulging portion of the second roof reinforcement.

  The second roof reinforcement is joined to a portion where the gusset and the first roof reinforcement overlap. For this reason, at least in this part, the three members of the gusset, the first roof reinforcement, and the second roof reinforcement can be overlapped to improve the rigidity.

  A vehicle upper structure according to a second aspect of the present invention is the vehicle upper structure according to the first aspect, wherein a plurality of the welded portions are provided at intervals in the vehicle width direction, and the welded portion is interposed between the welded portions. A joint portion between the first roof reinforcement and the second roof reinforcement is provided.

  In the vehicle upper structure according to the second aspect of the present invention, when a collision load or the like acts on the welded portion between the gusset and the first roof reinforcement, the collision load or the like is transmitted to the second roof reinforcement via the joint portion. Can be efficiently dispersed in the Further, when a collision load or the like acts on the joint portion between the first roof reinforcement and the second roof reinforcement, the collision load or the like can be efficiently distributed to the gusset through the welded portion.

  A vehicle upper structure according to a third aspect of the present invention is the vehicle upper structure according to the first or second aspect, wherein the bulging portion includes a bead extending in the vehicle front-rear direction.

  In the vehicle upper structure according to the third aspect of the present invention, the rigidity of the second roof reinforcement can be improved by forming the bead. Further, when laser welding the gusset and the first roof reinforcement, the transmitted light of the laser can be shielded even when the laser optical axis is offset in the vehicle longitudinal direction.

  A vehicle upper structure according to a fourth aspect of the present invention is the vehicle upper structure according to any one of the first to third aspects, wherein the first roof reinforcement extends from the roof side rails on both sides to the vehicle lower side. Arranged between the extended pillars.

  In the vehicle superstructure according to the fourth aspect of the present invention, the collision load can be efficiently transmitted from the pillar through the first roof reinforcement at the time of a collision such as a side collision.

  The vehicle upper structure according to a fifth aspect of the present invention is the vehicle upper structure according to any one of the first to fourth aspects, wherein the second roof reinforcement is at both ends in the vehicle width direction of the first roof reinforcement. It is arranged in the part.

  In the vehicle upper structure according to the fifth aspect of the present invention, the weight of the second roof reinforcement is greater than that in the case where the second roof reinforcement is extended to the center in the vehicle width direction of the first roof reinforcement. Increase can be suppressed.

  A vehicle upper structure according to a sixth aspect of the present invention is the vehicle upper structure according to any one of the first to fourth aspects, wherein the second roof reinforcement is disposed across the roof side rails. ing.

  In the vehicle upper structure according to the sixth aspect of the present invention, the rigidity can be improved as compared with the case where the second roof reinforcement is provided only in a part in the vehicle width direction.

  As described above, according to the vehicle upper structure according to the first aspect, the roof panel can be prevented from being burned by the transmitted light of the laser, and the rigidity is higher than that of the configuration in which the two members are overlapped. It has an excellent effect that it can be improved.

  The vehicle upper structure according to claim 2 has an excellent effect that the bonding strength between the three members of the gusset, the first roof reinforcement, and the second roof reinforcement can be improved.

  According to the vehicle upper structure according to the third aspect, there is an excellent effect that the shielding area of the laser can be widened.

  According to the vehicle upper structure of the fourth aspect, there is an excellent effect that the pillar can be prevented from falling down at the time of a side collision.

  The vehicle upper structure according to claim 5 has an excellent effect that an increase in vehicle weight can be suppressed.

  The vehicle upper structure according to the sixth aspect has an excellent effect that the rigidity can be improved.

1 is a perspective view showing an upper portion of a vehicle to which a vehicle upper structure according to a first embodiment is applied. It is the perspective view which looked at the principal part of the vehicle upper part concerning a 1st embodiment from the vehicle outside. It is the perspective view which looked at the principal part of the vehicle upper part which concerns on 1st Embodiment from the vehicle inner side. It is an expanded sectional view which expands and shows the cut surface cut | disconnected by 4-4 lines of FIG. It is an expanded sectional view which expands and shows the cut surface cut | disconnected by the 5-5 line | wire of FIG. It is a figure for demonstrating the procedure which assembles | attaches the roof panel which concerns on 1st Embodiment, (A) shows the state by which the roof panel, the 1st roof reinforcement, and the 2nd roof reinforcement were joined. (B) shows a state where the first roof reinforcement and the gusset are laser welded. (A) is sectional drawing corresponding to FIG. 5 which shows the principal part of the 1st modification of the vehicle superstructure which concerns on 1st Embodiment, (B) is the vehicle superstructure which concerns on 1st Embodiment. It is sectional drawing corresponding to FIG. 5 which shows the principal part of a 2nd modification. It is a perspective view corresponding to Drawing 2 showing the upper part of vehicles to which vehicles superstructure concerning a 2nd embodiment was applied.

<First Embodiment>
Hereinafter, with reference to FIGS. 1-6, 1st Embodiment of the vehicle superstructure which concerns on this invention is described. 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. A front pillar 22 extends from the front end portion of the roof side rail 16 toward the front of the vehicle and toward the bottom of the vehicle. A center pillar (pillar) 24 extends from the center of the roof side rail 16 in the vehicle front-rear direction toward the vehicle lower side. Further, a rear pillar 26 extends from the rear end portion of the roof side rail 16 toward the rear of the vehicle and downward of the vehicle.

  Further, 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 respectively joined to a rocker (not shown) extending along the vehicle front-rear direction. 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 vehicle side view.

  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.

  Here, a first roof reinforcement 32 (hereinafter referred to as “first roof R / F 32” as appropriate) is disposed between the roof side rails 16 on the lower surface side of the roof panel 14. The first roof R / F 32 is formed in a long and substantially rectangular shape in plan view with the vehicle width direction as the longitudinal direction, and is disposed between the pair of center pillars 24 as an example in the present embodiment. Yes.

  In the present embodiment, the first roof R / F 32 is disposed between the pair of center pillars 24, but is not limited thereto, and the first roof R / F 32 is offset in the vehicle longitudinal direction with respect to the center pillar 24. It may be arranged at the position. Moreover, you may arrange | position several 1st roof R / F32 at intervals in the vehicle front-back direction. Further, the other end side of the first roof R / F 32 in the vehicle width direction may be offset in the vehicle front-rear direction and disposed obliquely in plan view.

  The first roof R / F 32 is a reinforcing member for the roof panel 14 and extends in the vehicle width direction. As shown in FIG. 2, the vehicle width direction end portion 32 </ b> A of the first roof R / F 32 is gently inclined downward toward the roof side rail 16.

  Further, the first roof R / F 32 is formed in a substantially hat-like cross section with the vehicle upper side open, and includes a pair of flange portions 32B at both ends in the vehicle front-rear direction. The first roof R / F 32 has a vehicle width direction. A groove portion 32 </ b> C that is recessed upward in the vehicle is formed in the center portion along the vehicle width direction. Further, bottom portions 32D are formed on both sides in the vehicle front-rear direction across the groove 32C. Here, a mastic adhesive 38 is applied to the upper surfaces of the pair of flange portions 32B at intervals in the vehicle width direction, and the roof panel 14 is bonded (adhered) to the upper surfaces of the flange portions 32B. In FIG. 2, the roof panel 14 is not shown for convenience of explanation.

  An end 32A in the vehicle width direction of the first roof R / F 32 is joined to an upper surface of a gusset 34 that extends inward in the vehicle width direction from the roof side rail 16. A second roof reinforcement 36 (hereinafter, referred to as “second roof R / F 36” as appropriate) is joined to the upper surface of the vehicle width direction end portion 32A of the first roof R / F 32. Details of the second roof R / F 36 will be described later.

  As shown in FIG. 3, the gusset 34 is formed in a substantially hat-shaped cross-section with the vehicle upper side opened like the first roof R / F 32, and includes a pair of flange portions 34 </ b> A at both ends in the vehicle front-rear direction. ing. The pair of flange portions 34A are overlapped with the lower surface of the flange portion 32B of the first roof R / F 32, and are joined to each other by laser welding described later. Further, a groove 34B recessed upward in the vehicle is formed in the vehicle width direction center of the gusset 34 along the vehicle width direction, and this groove 34B enters the groove 32C of the first roof R / F 32. .

  Further, bottom portions 34D are formed on both sides of the groove portion 34B in the vehicle width direction, and are overlapped with the bottom portion 32D of the first roof R / F 32 and joined to each other by laser welding. Further, a mounting flange portion 34C extends toward the vehicle front-rear direction and the vehicle lower side at an end portion on the outer side in the vehicle width direction of the gusset 34, and the mounting flange portion 34C extends to the inner panel 42 of the roof side rail 16. It is joined.

  As shown in FIG. 4, the roof side rail 16 includes an inner panel 42 and an outer panel 40, and an upper end portion of the inner panel 42 and an upper end portion of the outer panel 40 are joined by a joining portion 44 </ b> A. ing. Further, the lower part of the outer panel 40 extends downward while continuing to the outer panel 40 of the center pillar 24.

  Further, an outer reinforcement 46 (hereinafter, referred to as “outer R / F 46” as appropriate) is provided between the inner panel 42 and the outer panel 40. 44A, the inner panel 42 and the outer panel 40 are joined together. The lower end portion of the outer R / F 46 is joined to the inner panel 42 at the joint portion 44B. Note that, at a position away from the center pillar 24 in the vehicle front-rear direction, the inner panel 42, the outer panel 40, and the outer R / F 46 are joined to each other by a joint portion 44B to form a closed section.

  Here, the mounting flange portion 34C at the vehicle width direction outer side end portion of the gusset 34 is overlapped from the center portion of the inner panel 42 in the vehicle vertical direction to the upper portion, and is joined by spot welding or laser welding or the like. Yes. Further, the first roof R / F 32 is superimposed on the upper surface of the inner end of the gusset 34 in the vehicle width direction, and the flange portion 34A of the gusset 34 and the flange portion 32B of the first roof R / F 32 are laser welded. Are joined together (welded portion 50). Further, as shown in FIG. 3, the bottom portion 32D of the gusset 34 and the bottom portion 34D of the first roof R / F 32 are joined to each other by laser welding (welded portion 52).

  Next, the second roof R / F 36 joined to the upper surface of the first roof R / F 32 will be described. As shown in FIG. 2, the second roof R / F 36 is a substantially rectangular plate material having substantially arc-shaped notches 36A on both sides in the vehicle width direction in plan view, and the vehicle width of the first roof R / F 32 is It is arrange | positioned at the direction both ends.

  The length of the second roof R / F 36 in the vehicle front-rear direction is substantially the same as the length of the first roof R / F 32 in the vehicle front-rear direction. Both ends in the direction are overlapped with the upper surface of the flange portion 32B of the first roof R / F 32. Therefore, both ends of the second roof R / F 36 in the vehicle front-rear direction are overlapped with a portion where the first roof R / F 32 and the gusset 34 overlap as shown in FIG. 5, and the second roof R / F 36 is overlapped. The vehicle width direction center part of this forms the closed cross section 56 with 1st roof R / F32. Further, the first roof R / F 32 and the second roof R / F 36 are joined to each other by spot welding at the joint 54. Here, as shown in FIG. 4, a plurality of joint portions 54 are provided at intervals in the vehicle width direction, and the welded portion 50 between the gusset 34 and the first roof R / F 32 is in the vehicle width direction. Are provided at different positions.

  In addition, the joining part 54 which concerns on this embodiment is provided between the welding parts 50 of 1st roof R / F32 and the gusset 34, and the welding parts 50 and the joining parts 54 are provided alternately in the vehicle width direction. However, it is not limited to this. For example, two joints 54 may be provided between adjacent welds 50, and conversely, two welds 50 may be provided between adjacent joints 54. Further, the joint portion 54 may be provided at a site other than between the welded portions 50.

  Here, as shown in FIG. 2, beads 36 </ b> B as a plurality of bulging portions are formed at both ends in the vehicle front-rear direction of the second roof R / F 36 at intervals in the vehicle width direction. The bead 36B extends in the vehicle front-rear direction, and as shown in FIG. 5, end portions of the beads 36B facing each other are inclined downward inward in the vehicle width direction.

  Further, as shown in FIG. 4, the bead 36 </ b> B is provided on the vehicle upper side of the welded portion 50 where the gusset 34 and the first roof R / F 32 are laser-welded, and covers a portion covering the welded portion 50. It is formed by causing the vehicle to bulge upward.

  In the present embodiment, as an example, three beads 36B are formed at the vehicle front end portion of the second roof R / F 36, and three beads 36B are formed at the vehicle rear end portion, but this is not limitative. Instead, the number of beads 36B may be changed as appropriate. For example, four or more beads 36B may be formed at both ends of the second roof R / F 36 in the vehicle front-rear direction, or two or less beads 36B may be formed. Moreover, you may comprise so that the number of beads 36B may differ in the vehicle front end part of 2nd roof R / F36, and a vehicle rear end part.

  The roof panel 14 is disposed on the vehicle upper side of the second roof R / F 36 configured as described above. The roof panel 14 is formed in a substantially hat shape in cross section with a metal such as a steel plate, and includes flange portions 14A at both ends in the vehicle width direction (in FIG. 4, only the flange portion 14A on the left side of the vehicle is illustrated. ).

  The flange portion 14A is joined by a joint portion 44A between the inner panel 42 and the outer panel 40. The flange portion 14A is bent upward from the flange portion 14A and further extends in the vehicle width direction. In this way, a gap 58 is formed between the roof panel 14 and the second roof R / F 36. A portion of the roof panel 14 on the inner side in the vehicle width direction from the second roof R / F 36 is joined (adhered) to the first roof R / F 32 by a mastic adhesive 38.

  In the present embodiment, as shown in FIG. 2, by forming a notch 36A in the second roof R / F 36, the contact area with the roof side rail 16 is reduced, so that abnormal noise during traveling can be reduced. Although it has the effect to reduce, it is not restricted to this, It is not necessary to form 36 A of notches. Further, the notch 36A may be formed only on the outer side in the vehicle width direction of the second roof R / F 36. Furthermore, the shape of the notch 36A is not limited to a substantially arc shape, and may be another shape.

(Action and effect)
Next, functions and effects will be described while explaining an assembly process of the roof panel 14 in the vehicle 10 to which the vehicle upper structure according to the present embodiment is applied.

  Before the roof panel 14 is assembled to the vehicle upper portion 12, the first roof R / F 32 and the second roof R / F 36 are joined to the roof panel 14 as shown in FIG. Here, in this embodiment, as an example, the first roof R / F 32 and the second roof R / F 36 are joined by spot welding. 6 is a cross-sectional portion of the bead 36B, the joint 54 is not shown, but a similar joint 54 is provided between the beads 36B. Further, in this embodiment, as shown in FIG. 4, spot welding is performed at two locations at intervals in the vehicle width direction. In other words, the two joint portions 54 are provided at an interval in the vehicle width direction.

  Next, the roof panel 14 is joined (adhered) to the first roof R / F 32 by the mastic adhesive 38 or the like. In this way, compared to the case where the first roof R / F 32 and the roof panel 14 are joined by spot welding, it is possible to avoid the formation of weld marks on the upper surface of the roof panel 14. Deterioration can be suppressed.

  After the roof panel 14, the first roof R / F 32, and the second roof R / F 36 are joined as described above, they are lowered onto the gusset 34 and positioned. At this time, the flange portion 14A of the roof panel 14 is overlapped with the upper surface of the outer panel 40 of the roof side rail 16 with the vehicle width direction end portion of the second roof R / F 36 interposed therebetween. As a result, the flange 14A, the second roof R / F 36, the outer panel 40, the outer R / F 46, the inner panel 42, and the gusset 34 are superposed and spot-welded in order from the top. In addition, you may join by another method, for example, you may join with a volt | bolt and a nut.

  Next, as shown in FIG. 6B, the laser L1 is irradiated from the lower surface side of the gusset 34, and the gusset 34 and the first roof R / F 32 are laser-welded (welded portion 50, welded portion 52). . That is, the welded portion 52 is formed by irradiating the laser L1 to the portion where the bottom portion 32D of the gusset 34 and the bottom portion 34D of the first roof R / F 32 are overlapped, and the flange portion 32B of the gusset 34 and the first roof R / F 32 are formed. The welded portion 50 is formed by irradiating the portion where the flange portion 34A is overlapped with the laser L1.

  Here, at the time of laser welding, when the laser beam is irradiated from the welded portion 50 to above the vehicle by the transmitted light L2 of the laser L1, the transmitted light L2 is shielded (absorbed) by the bead 36B provided in the second roof R / F 36. . Thereby, it is possible to suppress the transmitted light L2 from reaching the roof panel 14. As a result, the roof panel 14 can be prevented from being burnt, and the design of the roof panel 14 can be ensured. On the other hand, the transmitted light L2 of the laser L1 irradiated to the welded portion 52 is shielded (absorbed) by the second roof R / F 36, so that it does not reach the roof panel 14.

  The left half of FIG. 6 is a cross-sectional portion between the beads 36B and is not laser-welded. However, a similar welded portion 50 and welded portion 52 are provided at the portion where the bead 36B is provided. Yes. Further, in the present embodiment, as shown in FIG. 4, laser welding is performed at three locations at intervals in the vehicle width direction, and laser welding is similarly performed at three locations on the opposite end of the vehicle upper portion 12. ing. Furthermore, in this embodiment, after the roof panel 14 is spot welded to the roof side rail 16, laser welding is performed. However, the present invention is not limited to this, and the first roof R / F 32 and the second roof R / F 36 are first connected. Laser welding may be performed, and then spot welding of the roof panel 14 may be performed.

  By assembling the roof panel 14 as described above, work efficiency can be improved by laser welding while avoiding burning of the roof panel 14. In laser welding, the welding pitch can be made narrower than when joining by spot welding or the like. For example, welding can be performed at a pitch of 30 mm or less. Further, since the second roof R / F 36 is joined to a portion where the gusset 34 and the first roof R / F 32 overlap, there are three gussets 34, the first roof R / F 32, and the second roof R / F 36. The members can be overlapped. As a result, the rigidity can be improved as compared with the configuration in which the two members are overlapped, and the collision load can be efficiently transmitted at the time of a collision such as a side collision.

  Further, in the present embodiment, since the transmitted light L2 of the laser L1 is shielded by the bead 36B extending in the vehicle longitudinal direction, even when the optical axis of the laser L1 is offset in the vehicle longitudinal direction. The transmitted light L2 of the laser L1 can be shielded, and the shielding region of the laser L1 can be widened. Furthermore, the rigidity of 2nd roof R / F can be improved by forming the bead 36B.

  Further, as shown in FIG. 1, in the present embodiment, the first roof R / F 32 is disposed between the pair of center pillars 24, so that the first roof R 24 can be moved from the center pillar 24 to the first roof at the time of a collision such as a side collision. The collision load can be efficiently transmitted through the R / F. As a result, the center pillar 24 can be prevented from falling inward in the vehicle width direction at the time of a side collision, and a space in the vehicle compartment can be secured.

  In the present embodiment, the same joint structure is applied to both sides of the vehicle upper portion 12 in the vehicle width direction. However, the present invention is not limited to this, and different joint structures may be applied to one side and the other side in the vehicle width direction. . For example, the gusset 34 and the first roof R / F 32 are joined by laser welding on one side in the vehicle width direction, and the gusset 34 and the first roof R / F 32 are joined by bolts and nuts on the other side in the vehicle width direction. You may join.

  Further, in this embodiment, the bead 36B is formed on the second roof R / F 36 to shield the transmitted light L2 of the laser L1, but the present invention is not limited to this, and the structure of the modified example of FIG. 7 is applied. Also good. That is, as shown in FIG. 7 (A), the vehicle upper portion 62 of the vehicle 60 to which the vehicle upper structure according to the first modification is applied has a second roof R / F 64 on the upper surface of the first roof R / F 32. A plurality of convex portions 64A as bulging portions are formed at both ends of the second roof R / F 64 in the vehicle front-rear direction. Here, the convex portion 64A is formed by causing the second roof R / F 64 to bulge upward in the vehicle, and has a substantially semicircular cross section.

  Further, as shown in FIG. 7B, the vehicle upper portion 72 of the vehicle 70 to which the vehicle upper structure according to the second modified example is applied has a second roof R / F 74 on the upper surface of the first roof R / F 32. A plurality of convex portions 74A as bulging portions are formed at both ends of the second roof R / F 74 in the vehicle front-rear direction. Here, the convex portion 74A is formed by causing the second roof R / F 74A to bulge upward in the vehicle, and has a substantially hat-shaped cross section. Even if the above structure is applied, the transmitted light L2 of the laser L1 irradiated at the time of laser welding can be shielded.

Second Embodiment
Next, a second embodiment of the vehicle upper structure according to the present invention will be described with reference to FIG. In addition, about the structure similar to 1st Embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted suitably.

  As shown in FIG. 8, the vehicle upper portion 82 of the vehicle 80 to which the vehicle upper structure according to the present embodiment is applied is referred to as a second roof reinforcement 84 (hereinafter referred to as “second roof R / F 84” as appropriate). ) Is provided.

  The second roof R / F 84 is formed in an elongated shape with the vehicle width direction as the longitudinal direction, and is spanned between the roof side rails 16. The second roof R / F 84 is joined to the upper surface of the first roof R / F 32 over the entire region in the vehicle width direction.

  Further, both sides of the second roof R / F 84 in the vehicle width direction are inclined downward toward the vehicle width direction end, and the vehicle width direction end portion has a substantially arc shape on both sides in the vehicle width direction in plan view. A cutout portion 84A is formed. Further, a plurality of beads 84B as bulging portions are formed at the vehicle width direction end portion of the second roof R / F 84 at intervals in the vehicle width direction. The beads 84B extend in the vehicle front-rear direction, and as an example in the present embodiment, three beads 84B are provided at both ends in the vehicle front-rear direction. The bead 84B is provided on the vehicle upper side of the welded portion 50 where the gusset 34 and the first roof R / F 32 are laser-welded, and a portion covering the welded portion 50 is bulged upward from the vehicle. It is formed (see FIG. 5).

(Action and effect)
According to the vehicle 80 to which the vehicle upper structure according to the present embodiment is applied, the first roof R / F 32 and the second roof R / F 84 are joined over the entire region in the vehicle width direction. The rigidity of the vehicle upper part 82 can be improved compared with the form. Other operations are the same as in the first embodiment.

  In the present embodiment, the bead 84B is provided only at the vehicle width direction end portion of the second roof R / F 84. However, the present invention is not limited to this. For example, the second roof R / F 84 has one end to the other end in the vehicle width direction. The beads 84B may be provided at equal intervals over the part. In this case, the first roof R / F 32 and the second roof R / F 84 can be laser-welded over the entire region in the vehicle width direction, and can be joined more firmly.

  As described above, the vehicle upper structure according to the first embodiment and the second embodiment of the present invention has been described. However, these embodiments may be appropriately combined and used without departing from the gist of the present invention. Of course, it can be implemented in any manner.

12 Vehicle upper part 14 Roof panel 16 Roof side rail 24 Center pillar (pillar)
32 1st roof reinforcement 34 Gusset 36 2nd roof reinforcement 36B Bead (bulging part)
50 welded portion 54 joined portion 58 gap 62 upper portion of vehicle 64 second roof reinforcement 64A convex portion (bulged portion)
72 Upper part of vehicle 74 Second roof reinforcement 74A Convex part (bulging part)
82 Upper part of vehicle 84 Second roof reinforcement 84B Bead (bulging part)

Claims (6)

Roof side rails extending along the vehicle longitudinal direction on both sides in the vehicle width direction of the upper part of the vehicle;
A gusset extending inward in the vehicle width direction from the roof side rail;
A first roof reinforcement provided with a vehicle width direction as a longitudinal direction and having an end in the vehicle width direction joined to the upper surface of the gusset by laser welding;
The first roof reinforcement on the upper surface of the first roof reinforcement is joined to a portion where the first roof reinforcement and the gusset overlap, and bulges upward in the vehicle to a portion covering the welded portion between the gusset and the first roof reinforcement. A second roof reinforcement with a raised bulge,
A roof panel disposed with a gap on the vehicle upper side of the second roof reinforcement;
A vehicle superstructure. A plurality of the welds are provided at intervals in the vehicle width direction,
The vehicle upper structure according to claim 1, wherein a joint portion between the first roof reinforcement and the second roof reinforcement is provided between the welded portions.   The vehicle upper structure according to claim 1, wherein the bulging portion includes a bead extending in a vehicle front-rear direction.   The vehicle upper structure according to any one of claims 1 to 3, wherein the first roof reinforcement is disposed between pillars extending from the roof side rails on both sides to the vehicle lower side.   The vehicle upper structure according to any one of claims 1 to 4, wherein the second roof reinforcement is disposed at both ends of the first roof reinforcement in the vehicle width direction.   The vehicle upper structure according to any one of claims 1 to 4, wherein the second roof reinforcement is disposed between the roof side rails.

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