JP2013147160A - Body superstructure - Google Patents

Abstract

A vehicle body upper structure capable of suppressing thermal distortion of a resin roof panel and ensuring steering stability of the vehicle body.
A vehicle body superstructure 20 includes a pair of left and right roof side rails 22 disposed on both sides of a vehicle 10 along a vehicle front-rear direction, and extends along the vehicle width direction and the vehicle front-rear direction. The reinforcing panel 24 is provided between the rails 22 and joined to the roof side rails 22 with a hard first adhesive 50. Further, a resin roof panel 26 extending along the vehicle width direction and the vehicle front-rear direction is provided above the vehicle with respect to the reinforcement panel 24 between the roof side rails 22. The second adhesive 52 that is softer than the first adhesive 50 is joined.
[Selection] Figure 2

Description

  The present invention relates to a vehicle body superstructure.

  In Patent Document 1 below, a roof member and a roof side panel outer made of different materials are fastened by a fastening member having a drillable cutting blade, and a roof is used to avoid interference with the tip of the fastening member. A vehicle body panel joining structure having an escape hole opened in a side inner is disclosed. As the different materials, for example, an aluminum alloy or the like is used for the roof panel, and a steel plate or the like is used for the roof side panel outer or the roof side inner.

JP 2011-105102 A

  In Patent Document 1, the above structure suppresses relative displacement between the roof panel and the roof side rail outer having different linear expansion coefficients. However, when a resin roof panel is used instead of an aluminum alloy roof panel, there is room for improvement in order to achieve a simpler joint structure, to suppress thermal distortion of the resin roof panel and to ensure steering stability. .

  An object of the present invention is to obtain a vehicle body upper structure capable of suppressing thermal distortion of a resin roof panel and ensuring steering stability of the vehicle body in consideration of the above facts.

  According to the first aspect of the present invention, a vehicle body superstructure includes a pair of left and right roof side rails arranged on both sides of the upper part of the vehicle body along the longitudinal direction of the vehicle, and spans between the roof side rails. A reinforcing member joined by the first joining member and extending along the vehicle width direction and the vehicle front-rear direction, and in the vehicle width direction and the vehicle front-rear direction above the reinforcement member between the roof side rails. And a resin roof panel joined to the reinforcing member by a second joining member extending along the first joining member and having a rigidity smaller than that of the first joining member.

  According to a second aspect of the present invention, in the vehicle body superstructure according to the first aspect, the resin roof panel is an adhesive capable of suppressing the occurrence of thermal distortion of the resin roof panel as the second joining member to the reinforcing member. The reinforcing member is bonded to the roof side rail as the first bonding member with another adhesive harder than the adhesive.

  According to a third aspect of the present invention, in the vehicle body superstructure according to the second aspect, the reinforcing member is joined to the roof side rail by welding, friction stir welding, or rivets instead of the other adhesive. .

  According to the first aspect of the present invention, the pair of left and right roof side rails are arranged along the vehicle longitudinal direction on both sides of the upper part of the vehicle body, and the reinforcement extends along the vehicle width direction and the vehicle longitudinal direction. The member is bridged between the roof side rails and joined to the roof side rail by the first joining member. Furthermore, a resin roof panel extends along the vehicle width direction and the vehicle front-rear direction above the reinforcing member between the roof side rails, and has a second joint that is less rigid than the first joint member. The resin roof panel is joined to the reinforcing member by the member. That is, since the rigidity of the second joining member joining the resin roof panel and the reinforcing member is smaller than the rigidity of the first joining member joining the reinforcing member and the roof side rail, the thermal strain of the resin roof panel is reduced. Occurrence is suppressed. Further, by increasing the rigidity of the first joining member that joins the reinforcing member and the roof side rail, the relative displacement of the left and right roof side rails is suppressed, and the steering stability of the vehicle body can be ensured.

  According to the second aspect of the present invention, the resin roof panel is bonded to the reinforcing member as the second bonding member with an adhesive capable of suppressing the occurrence of thermal distortion of the resin roof panel, and the reinforcing member is the roof side rail. The first bonding member is bonded with another adhesive harder than the above adhesive. As a result, thermal distortion of the resin roof panel is suppressed, and the rigidity of the other adhesive that joins the reinforcing member and the roof side rail is made larger than the rigidity of the adhesive that joins the resin roof panel and the reinforcing member. Thus, the steering stability of the vehicle body can be ensured.

  According to the third aspect of the present invention, the reinforcing member is joined to the roof side rail by welding, friction stir welding, or rivets, and the rigidity of these joining members joins the resin roof panel and the reinforcing member. Greater than the stiffness of the adhesive. For this reason, the thermal distortion of the resin roof panel is suppressed, and the steering stability of the vehicle body can be ensured.

  According to the vehicle body superstructure according to the present invention, the thermal distortion of the resin roof panel can be suppressed and the steering stability of the vehicle body can be ensured.

1 is a perspective view showing an upper part of a vehicle to which a vehicle body superstructure according to a first embodiment is applied. It is a longitudinal cross-sectional view of the vehicle body superstructure along line 2-2 in FIG. It is a longitudinal cross-sectional view of the vehicle body upper structure corresponding to FIG. 2 which shows a state when the resin roof panel is thermally expanded. It is a longitudinal cross-sectional view of the vehicle body upper structure which shows the state of the resin roof panels at the time of curve driving | running | working. It is a longitudinal cross-sectional view corresponding to FIG. 2 which shows the vehicle body upper structure which concerns on 2nd Embodiment. It is a perspective view which shows the upper part of the vehicle to which the vehicle body upper structure which concerns on 3rd Embodiment was applied. It is a longitudinal cross-sectional view corresponding to FIG. 2 which shows the vehicle body upper structure which concerns on a comparative example.

  Hereinafter, a first embodiment of a vehicle body superstructure according to the present invention will be described with reference to FIGS. In these drawings, an arrow FR appropriately shown indicates the vehicle front side, an arrow UP indicates the vehicle upper side, and an arrow OUT indicates the vehicle width direction outer side.

  FIG. 1 is a perspective view showing an upper portion of a vehicle 10 to which the vehicle body superstructure 20 according to the present embodiment is applied. FIG. 2 shows a longitudinal sectional view of the vehicle body superstructure 20 taken along line 2-2 in FIG. As shown in FIG. 1, a front pillar 12, a center pillar 14, and a rear pillar 16 are arranged in order from the vehicle front side on the side of the vehicle 10. The front pillar 12, the center pillar 14, and the rear pillar 16 are provided on the left and right sides of the vehicle 10 as a pair. A pair of left and right roof side rails (vehicle main body) 22 extending substantially along the vehicle front-rear direction is provided on both sides of the upper portion of the vehicle 10 above the front pillar 12, the center pillar 14, and the rear pillar 16. ing.

  As shown in FIGS. 1 and 2, the vehicle body upper structure 20 according to the present embodiment includes a pair of left and right roof side rails 22 and a reinforcing panel 24 (FIG. 2) as a reinforcing member spanned between the roof side rails 22. And a resin roof panel (resin roof panel) 26 covering the upper side of the reinforcing panel 24 between the roof side rails 22.

  The reinforcing panel 24 is made of a plate-like member and extends in the vehicle width direction and the vehicle front-rear direction. The roof panel 26 is made of a resin plate-like member, and extends in the vehicle width direction and the vehicle front-rear direction on the vehicle outer side than the reinforcing panel 24. That is, the roof panel 26 is disposed so as to cover the upper portion of the vehicle 10 and forms a design surface. The reinforcing panel 24 is arranged so as to cover the upper part of the vehicle 10 with the same size as the roof panel 26 in a plan view of the vehicle, but is located on the inner side of the vehicle with respect to the roof panel 26 and is compared with a steel plate or aluminum. It is made of a material with a high Young's modulus. A front roof header 28 that connects the front ends of the roof side rails 22 and a rear roof header 30 that connects the rear ends of the roof side rails 22 to the front end and the rear end of the roof panel 26 at the top of the vehicle 10. Is provided.

  The roof side rails 22 are respectively coupled to the upper ends of the front pillar 12, the center pillar 14, and the rear pillar 16, and serve as a vehicle skeleton member that is disposed with the vehicle longitudinal direction as a longitudinal direction. The roof side rail 22 is formed to be curved so that the height of the vehicle front-rear direction intermediate portion is higher than the height of both ends of the vehicle front-rear direction in a side view of the vehicle. A front side door opening 32 formed on the vehicle front side of the center pillar 14 and a rear side door opening formed on the vehicle rear side of the center pillar 14 are provided below the roof side rail 22 on the side of the vehicle 10. 34 is provided. A window shield glass 36 is provided between the front pillars 12 on the vehicle front side of the roof panel 26.

  As shown in FIG. 2, the roof side rail 22 includes an inner panel (roof side rail inner) 40 disposed on the inner side in the vehicle width direction, and an outer panel (roof side rail) disposed on the outer side in the vehicle width direction of the inner panel 40. (Outer) 42 and a cycle outer (side member outer panel) 44 disposed outside the outer panel 42 in the vehicle width direction. Inner panel 40 has a bent portion 40A bent toward the inside of the vehicle, a flange portion 40B extending inward in the vehicle width direction from an inner upper end portion of bent portion 40A, and an obliquely lower side of the vehicle from an outer lower end portion of bent portion 40A. And a flange portion 40C.

  The outer panel 42 includes a projecting portion 42A formed so as to project outward in the vehicle width direction, a flange portion 42B extending inward in the vehicle width direction from the inner end portion of the projecting portion 42A, and an outer end of the projecting portion 42A. A flange portion 42C extending obliquely downward from the vehicle. The outer outer 44 includes a protruding portion 44A formed so as to protrude outward in the vehicle width direction so as to cover the protruding portion 42A of the outer panel 42, and a flange portion 44B extending inward in the vehicle width direction from the inner end portion of the protruding portion 44A. , And a flange portion 44C extending obliquely downward from the lower end of the projecting portion 44A.

  The inner panel 40, the outer panel 42, and the cylinder outer 44 are overlapped with the flange portions 40B, 42B, 44B inside the vehicle in order from the vehicle lower side, and the flange portions 40C, 42C, 44C outside the vehicle are overlapped, and these are welded respectively. It is joined by. The flange portions 40B, 42B, and 44B on the vehicle inner side are arranged in a substantially lateral direction when the vehicle is viewed from the rear. Further, the first adhesive (other adhesive as the first joining member) 50 is hard on the lower surface of the end 24 </ b> A on the outer side in the vehicle width direction of the reinforcing panel 24 on the upper surface of the flange 44 </ b> B on the inner side of the cylinder outer 44. Are joined (adhered). Further, the lower surface of the end portion 26 </ b> A on the outer side in the vehicle width direction of the roof panel 26 is a second adhesive (second second) softer than the first adhesive 50 on the upper surface of the end portion 24 </ b> A on the outer side in the vehicle width direction of the reinforcing panel 24. Are bonded (adhered) with an adhesive) 52 as a bonding member. In other words, the end portion 26A of the roof panel 26 and the reinforcing panel 24 are joined based on the rigidity of the first adhesive 50 (adhesive layer after curing) that joins the reinforcing panel 24 and the flange portion 44B of the cylinder outer 44. The rigidity of the second adhesive 52 (adhesive layer after curing) is small.

  As shown in FIG. 1 and the like, the peripheral edge of the rectangular roof panel 26 is joined to the reinforcing panel 24 by a second adhesive 52 at an adhesive line 52A. The peripheral portion of the reinforcing panel 24 is joined to the vehicle main body (the left and right roof side rails 22, the front roof header 28, and the rear roof header 30) by a first adhesive 50.

  The end portion 26A of the roof panel 26 is joined to the end portion 24A of the reinforcing panel 24 with a second adhesive 52 that is softer than the first adhesive 50, so that the resin roof panel 26 that becomes a design surface is formed. Generation | occurrence | production of the distortion by heat is suppressed. As the second adhesive 52, for example, a urethane adhesive generally used for joining the window shield glass and the vehicle body is used.

  The first adhesive 50 is made of an adhesive harder than the second adhesive 52, and an adhesive having a Young's modulus several tens to several thousand times that of the second adhesive 52 is used. The first adhesive 50 is not limited to a urethane adhesive. The end portion 24A of the reinforcing panel 24 is joined to the flange portion 44B of the cylinder outer 44 with a hard first adhesive 50, so that the reinforcing panel 24 is relatively displaced between the left and right roof side rails 22 (in the shear direction of the upper part of the vehicle body). ), A decrease in steering stability is suppressed.

  Next, the operation and effect of this embodiment will be described.

  As shown in FIG. 2, the lower surface of the vehicle outer end portion 26 </ b> A of the resin roof panel 26 is softer than the first adhesive 50 on the upper surface of the vehicle outer end portion 24 </ b> A of the reinforcing panel 24. Bonded with an adhesive 52. That is, the end 26 </ b> A of the roof panel 26 and the reinforcing panel 24 are joined by the rigidity of the first adhesive 50 (adhesive layer after curing) that joins the reinforcing panel 24 and the flange portion 44 </ b> B of the cylinder outer 44. The rigidity of the second adhesive 52 (adhesive layer after curing) is small. As shown in FIG. 3, the resin roof panel 26 expands at a higher temperature than the reinforcing panel 24 made of a steel plate or the like. By using the soft second adhesive 52 at the joint between the end portion 26A of the roof panel 26 and the end portion 24A of the reinforcing panel 24, distortion due to the difference in linear expansion coefficient between the roof panel 26 and the reinforcing panel 24 is reduced. Occurrence can be suppressed. On the other hand, when the roof panel 26 and the reinforcing panel 24 are bonded using a hard adhesive (such as the first adhesive 50), the binding force on the roof panel 26 is large, and the deformation due to the difference in linear expansion coefficient is absorbed. Is difficult.

  In general, the right and left roof side rails may be displaced relative to each other during torsion during vehicle travel and during torsion during a static stiffness test. However, in the vehicle body superstructure 20 of the present embodiment, the first adhesive that is harder than the second adhesive 52 is used as the vehicle outer end 24 </ b> A of the reinforcing panel 24 on the flange 44 </ b> B of the outer outer 44 as the roof side rail 22. By joining at 50, the shear surface of the reinforcing panel 24 is effectively used, and the relative displacement of the roof side rail 22 is suppressed. That is, as shown in FIG. 4, by transmitting a load between the roof side rail 22 and the reinforcing panel 24 with the hard first adhesive 50, relative displacement of the roof side rail 22 is suppressed, and steering stability is improved. The decrease can be suppressed.

  On the other hand, when the end portion 24A of the reinforcing panel 24 and the flange portion 44B of the cylinder outer 44 are bonded with a soft adhesive (for example, the second adhesive 52), the adhesive does not transmit a load. The relative displacement cannot be suppressed, and the steering stability may be reduced.

  Therefore, in the vehicle body superstructure 20 of the present embodiment, the end portion 24A of the reinforcing panel 24 is joined to the flange portion 44B of the cylinder outer 44 with the hard first adhesive 50, and the end portion 26A of the roof panel 26 is connected to the reinforcing panel 24. It is possible to achieve both suppression of thermal distortion of the resin roof panel 26 and steering stability by being joined to the end portion 24A of the resin with the second adhesive 52 softer than the first adhesive 50. it can. Moreover, since the resin roof panel 26 can be specialized in the function as a design surface, the design freedom and design freedom of the resin roof panel 26 can be improved.

  FIG. 7 shows a vehicle body superstructure 100 of a comparative example. As shown in FIG. 7, in the vehicle body superstructure 100, the vehicle outer end portion 26 </ b> A of the resin roof panel 26 is joined to the flange portion 44 </ b> B of the cylinder outer 44 as the roof side rail 22 with an adhesive 102. Yes.

  In the vehicle body superstructure 100 of the comparative example, when the same soft adhesive as the second adhesive 52 is used as the adhesive 102, generation of distortion due to heat of the resin roof panel 26 can be suppressed. May be reduced. That is, when a soft adhesive is used, the roof panel 26 cannot exhibit the effect of suppressing the relative displacement of the left and right roof side rails 22.

On the other hand, when a hard adhesive similar to the first adhesive 50 is used as the adhesive 102, a decrease in steering stability can be suppressed. However, a thermal strain is applied to the resin roof panel 26 at a high temperature. May be noticeable.
Therefore, in the vehicle body superstructure 100 of the comparative example, it is difficult to achieve both suppression of thermal distortion of the resin roof panel 26 and steering stability.

  On the other hand, in the vehicle body superstructure 20 of the present embodiment, the end portion 24A of the reinforcing panel 24 is joined to the flange portion 44B of the cylinder outer 44 with the hard first adhesive 50, and the end portion 26A of the roof panel 26 is joined. By joining the end portion 24A of the reinforcing panel 24 with the second adhesive 52 softer than the first adhesive 50, it is possible to achieve both suppression of thermal distortion of the resin roof panel 26 and steering stability. Can be achieved.

  Next, a second embodiment of the vehicle body superstructure according to the present invention will be described with reference to FIG. Note that in the second embodiment, the same components and members as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 5, in the vehicle body superstructure 60 of the present embodiment, the end 24 </ b> A on the outer side in the vehicle width direction of the reinforcing panel 24 serves as a first joining member on the flange 44 </ b> B on the inner side in the vehicle width direction of the cycle outer 44. Are joined by a plurality of spot welds 62. In FIG. 5, only one spot weld 62 is shown. Further, the end 26A on the outer side in the vehicle width direction of the roof panel 26 is joined to the end 24A of the reinforcing panel 24 with a second adhesive 52 as a second joining member. That is, the second adhesion for joining the end portion 26A of the roof panel 26 and the end portion 24A of the reinforcing panel 24 is based on the rigidity of the spot weld 62 that joins the end portion 24A of the reinforcing panel 24 and the flange portion 44B of the cylinder outer 44. The rigidity of the agent 52 (adhesive layer after curing) is small. Although illustration is omitted, the outer peripheral edge of the reinforcing panel 24 is joined to the vehicle main body (the roof side rail 22, the front roof header, the rear roof header) by spot welding 62.

  In such a vehicle body superstructure 60, the soft second adhesive 52 is used at the joint between the end portion 26 </ b> A of the roof panel 26 and the end portion 24 </ b> A of the reinforcing panel 24. Generation | occurrence | production of the distortion by the difference of a linear expansion coefficient with the reinforcement panel 24 can be suppressed. Further, by joining the end portion 24 </ b> A of the reinforcing panel 24 to the flange portion 44 </ b> B of the cylinder outer 44 by spot welding 62, the relative displacement of the roof side rail 22 can be suppressed by effectively using the shear surface of the reinforcing panel 24. It is possible to suppress a decrease in steering stability.

  In the vehicle body superstructure 60, as an alternative to the spot welding 62 as the first joining member, the end 24A of the reinforcing panel 24 is fixed to the cylinder outer by laser welding, Friction Stir Welding (FSW), rivets or the like. The structure joined to vehicle main bodies, such as 44 flange parts 44B, may be sufficient. Here, the friction stir welding means that a cylindrical tool having a projection at the tip is rotated with a strong force and pressed to penetrate the joint of the two panel members, thereby generating frictional heat. This is a joining method in which the two panel members are integrated by softening the panel member and plastically flowing around the joint by the rotational force of the tool and kneading.

  Next, a third embodiment of the vehicle body superstructure according to the present invention will be described with reference to FIG. Note that, in the third embodiment, the same components and members as those in the first and second embodiments are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 6, in the vehicle body upper structure 70 of this embodiment, a bead 74 is formed on a reinforcing panel 72 as a reinforcing member disposed on the vehicle lower side of the resin roof panel 26. The bead 74 has a shape that intersects in an X shape along a diagonal line of the rectangular reinforcing panel 72 in a plan view of the vehicle, and is formed in a portion excluding the edge of the reinforcing panel 72. Other configurations of the vehicle body upper structure 70 are the same as those in the first embodiment.

  In such a vehicle body superstructure 70, by forming the bead 74 on the reinforcing panel 72, the rigidity of the reinforcing panel 72 can be increased, and a decrease in steering stability can be more reliably suppressed.

  In the first to third embodiments, the reinforcing panels 24 and 72 are substantially the same size as the resin roof panel 26 in a plan view of the vehicle, but are not limited thereto. For example, as long as the reinforcing panels 24 and 72 have a shape spanning the left and right roof side rails 22, the size and the like can be changed, and the reinforcing panels 24 and 72 may be divided into a plurality of panel members.

  In the first to third embodiments, the thicknesses of the first adhesive 50 and the second adhesive 52 and the joining positions of the reinforcing panel and the vehicle body such as the roof side rail 22 are the gist of the present invention. Changes can be made as appropriate without departing from the scope.

  Moreover, in 1st-3rd embodiment, the other adhesive agent is "hard" and "soft" with respect to one adhesive agent in the state which joined members (after adhesive hardening). It refers to the rigidity of (adhesive).

DESCRIPTION OF SYMBOLS 10 Vehicle 20 Car body superstructure 22 Roof side rail 24 Reinforcement panel (reinforcement member)
24A End 26 Roof panel (resin roof panel)
26A end 44 cycle outer (roof side rail)
44B Flange part 50 1st adhesive agent (other adhesive agent as 1st joining member)
52 2nd adhesive (adhesive as 2nd joining member)
52A Bonding line 60 Car body superstructure 62 Spot welding (first joining member)
70 Car body superstructure 72 Reinforcement panel (reinforcement member)

Claims (3)

A pair of left and right roof side rails arranged along the vehicle longitudinal direction on both sides of the upper part of the vehicle body;
A reinforcing member that is spanned between the roof side rails, is joined to the roof side rail by a first joining member, and extends along the vehicle width direction and the vehicle front-rear direction;
The reinforcing member is extended by a second joining member extending in the vehicle width direction and the vehicle front-rear direction above the reinforcing member between the roof side rails and having a rigidity smaller than that of the first joining member. A resin roof panel joined to
Car body superstructure with The resin roof panel is bonded to the reinforcing member with an adhesive capable of suppressing the occurrence of thermal distortion of the resin roof panel as the second bonding member,
The vehicle body upper structure according to claim 1, wherein the reinforcing member is joined to the roof side rail as the first joining member with another adhesive harder than the adhesive.   The vehicle body superstructure according to claim 2, wherein the reinforcing member is joined to the roof side rail by welding, friction stir welding, or rivets instead of the other adhesive.

Images