JP2010089754A - Roof structure for vehicle body - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a roof structure for a vehicle body in which the weight of a roof part and the number of welded parts can be reduced. <P>SOLUTION: A side roof cross bow 41 is provided between a side roof rail 20 comprising an angle pipe and a roof bow 40. The side roof cross bow 41 has a cross bow body 50 of a hat-like cross section and a reinforcement plate 51 joined to a lower surface side of the cross bow body 50, and forms a closed cross section structure. The side roof cross bow 41 forms a fan-like shape such that width in a longitudinal direction of the vehicle body is enlarged from an upper part toward a lower part. The side roof cross bow 41 is bonded to the roof bow 40 by fitting/welding an insertion part 60 formed on the upper part of the side roof cross bow 41 to an opening end 45 of the roof bow 40. A lower edge 50d of the side roof cross bow 41 is bonded to the side roof rail 20 by abutting/welding the lower edge 50d of the side roof cross bow 41 to an upper surface 20b of the side roof rail 20. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a roof structure of a vehicle body applied to a roof portion of a vehicle such as a large bus.

  An example of a conventional roof structure is disclosed in Patent Document 1. The roof structure of Patent Document 1 includes a roof rail having a closed cross-sectional structure extending in the front-rear direction of the vehicle body, a roof bow having a hat-shaped cross section extending in the width direction of the vehicle body, and a gusset having a hat-shaped cross section disposed on the top of the pillar (side roof crossbow). ). The roof bow is joined to the roof rail by welding via the gusset.

  For example, in a large sightseeing bus, a so-called high deck body with a raised floor surface is sometimes used to improve the view of passengers. However, when the floor surface position becomes high, it is conceivable that the running stability is affected, for example, the ceiling becomes high and the position of the center of gravity of the vehicle also becomes high. Therefore, in order to lighten the vehicle body, increase the rigidity of the vehicle body, and reduce costs, square pipes are used for the skeleton members of the vehicle body.

For example, as shown in FIG. 8, a roof structure having a pair of left and right side roof rails 1 (only one is shown) extending in the longitudinal direction of the vehicle body and a roof bow 2 disposed between the side roof rails 1 is known. In this roof structure, a roof rail 3 made of a square pipe is provided between the side roof rail 1 and the roof bow 2 in order to prevent a large stress from being generated at the joint portion of the roof bow 2 when the vehicle body is twisted. ing. The side roof rail 1 and the roof rail 3 are connected to each other by the welded portion 5 via the side roof crossbow 4 to increase the rigidity of the side portion of the roof portion in the vehicle width direction, thereby reducing the deformation amount of the roof portion. ing.
Japanese Utility Model Publication No. 62-197478

  In the roof structure of Patent Document 1, the rigidity of the roof portion may be insufficient when the vehicle has a large roof portion, such as a high decker vehicle. The conventional roof structure shown in FIG. 8 is heavy and has a large number of welds, so that the work load when assembling the roof part is large.

  Accordingly, it is an object of the present invention to provide a roof structure for a vehicle body that can be configured to have a lightweight and lightweight roof portion.

  The roof structure of the vehicle body according to the present invention includes a pair of left and right pipe-shaped side roof rails extending in the longitudinal direction of the vehicle body on both sides of the roof portion of the vehicle body, each having a rectangular closed cross-sectional structure, and the pair of side roof rails. A pipe-shaped roof bow that extends in the vehicle body width direction and is disposed at intervals in the vehicle body longitudinal direction, each having a closed cross-sectional structure and having an opening end that opens in the vehicle body width direction, and the roof bow And a side roof crossbow disposed in a curved shape when viewed from the front-rear direction of the vehicle body. This side roof crossbow has a shape that expands in a fan shape from one end on the upper side to the other end on the lower side when viewed from the side of the vehicle body and has a closed cross-sectional structure, and the one end is fitted to the opening end of the roof bow The other end is fixed to the side roof rail.

In a preferred embodiment of the present invention, the lower edge of the other end of the side roof crossbow is welded to the upper surface of the side roof rail over substantially the entire region in the vehicle body width direction.
The side roof crossbow includes a crossbow body having a hat-shaped cross section in the longitudinal direction of the vehicle body and flange portions on both sides in the longitudinal direction of the vehicle body, and the crossbow body is fixed by overlapping the lower surface side of the crossbow body. A reinforcing plate that closes the opening of the hat-shaped cross section, and the width of the reinforcing plate in the longitudinal direction of the vehicle body is larger than the width of the crossbow body in the longitudinal direction of the vehicle body, and on both sides of the reinforcing plate in the longitudinal direction of the vehicle body. A projecting portion projecting from the flange portion; and a first joining margin for fixing the lower surface of the roof bow on top of the reinforcing plate, and a lower portion of the reinforcing plate in the vehicle width direction of the side roof rail. You may have the 2nd joining margin which overlaps and fixes to an inner surface.

  According to the roof structure of claim 1, the rigidity against torsion or the like input to the roof portion of the vehicle body can be increased by the fan-shaped side roof crossbow, so that the vehicle body is deformed or vibration is generated in the roof portion. This can be suppressed. Further, since the number of welded portions of the roof portion is reduced, the welding work necessary for assembling the vehicle body is reduced. In addition, since one end of the side roof crossbow is directly coupled with the open end of the roofbow, the side roof crossbow and the roofbow are indirectly coupled via a roof rail made of a square pipe as in the past. Compared to the case, the weight of the roof portion can be reduced.

  According to the roof structure of claim 2, when the vehicle body is twisted or when a load in the vertical direction is inputted, a load acting on a joint portion between the side roof crossbow and the side roof rail is applied to the lower edge of the side roof crossbow. The side roof crossbow is received through the welded portion along the vehicle body width direction. Since the load acting on the joint is mostly in the vertical direction, the stress of the joint can be reduced with respect to the load in the vertical direction.

  According to the roof structure of the third aspect, when the roof bow and the side roof crossbow are welded, the roof bow and the side roof crossbow can be positioned in the vertical direction by the first joining margin. Further, when the side roof crossbow is welded to the side roof rail, the side roof crossbow can be positioned with respect to the side roof rail in the vehicle width direction by the second joining margin, so that the accuracy of the mounting position of the side roof crossbow is improved. . Further, by welding the first joining margin to the roof bow and welding the second joining margin to the side roof rail, the rigidity of the joint portion between the roof bow and the side roof crossbow and the joint portion between the side roof rail and the side roof crossbow is increased. be able to.

Hereinafter, a roof structure according to one embodiment of the present invention will be described with reference to FIGS. 1 to 7.
FIG. 1 shows a large bus as an example of the vehicle 10. A roof portion 12 having a roof structure according to the present invention is provided on an upper portion of a vehicle body 11 of the vehicle 10. The roof portion 12 includes a frame structure 13 and a roof panel 14 provided on the outside of the frame structure 13.

  FIG. 2 shows a part of the frame structure 13 constituting the roof portion 12. The frame structure 13 includes a pair of left and right side roof rails 20 and 21 extending in the front-rear direction of the vehicle body 11 and a plurality of wind pillars 22 extending in the vertical direction. The side roof rails 20 and 21 are provided on both side portions of the vehicle body 11, each of which is made of a metal pipe having a rectangular cross section, and has a closed cross section structure.

  The upper end of the wind pillar 22 provided on one side of the vehicle body 11 is coupled to one side roof rail 20. The upper end of the wind pillar 22 provided on the other side of the vehicle body 11 is coupled to the other side roof rail 21.

  Two types of roof bow units 31, 32 having different sizes are alternately arranged between the side roof rails 20, 21 at intervals in the front-rear direction of the vehicle body 11 (the direction indicated by the arrow X in FIG. 2). These two types of roof bow units 31 and 32 extend in the width direction of the vehicle body 11 (the direction indicated by the arrow Y in FIG. 2). Hereinafter, the direction indicated by the arrow X is referred to as the vehicle body longitudinal direction, and the direction indicated by the arrow Y is referred to as the vehicle body width direction. A plurality of stiffeners 35 extending in the longitudinal direction of the vehicle body are disposed between the roof bow units 31 and 32.

  One roof bow unit 31 of the two types of roof bow units 31 and 32 is disposed on the upper surface side of the side roof rails 20 and 21 at a location where the wind pillars 22 of the side roof rails 20 and 21 are not provided. . Hereinafter, one roof bow unit 31 is referred to as a first roof bow unit. A first roof bow unit 31 is shown in FIGS.

  Of the two types of roof bow units 31, 32, the other roof bow unit 32 is arranged at the side roof rails 20, 21 where the wind pillars 22 are provided, that is, where the side roof rails 20 are required to have high rigidity. , 21 are arranged on the upper surface side. Hereinafter, the roof bow unit 32 is referred to as a second roof bow unit. FIG. 7 shows the second roof bow unit 32.

  One end of each of the first roof bow unit 31 and the second roof bow unit 32 is coupled to one side roof rail 20. The other end of each of the roof bow units 31 and 32 is coupled to the other side roof rail 21.

  Below, the coupling | bond part of the side roof rail 20 and the roof bow units 31 and 32 in the one side part of the vehicle body 11 is demonstrated. In addition, since the coupling | bond part of the side roof rail 21 and the roof bow units 31 and 32 in the other side part of the vehicle body 11 is comprised similarly, description is abbreviate | omitted.

  As shown in FIGS. 3 to 6, the first roof bow unit 31 includes a first roof bow 40 and a first side roof crossbow 41. The first roof bow 40 has a pipe shape and extends in the vehicle body width direction. The roof bow 40 is made of a metal pipe having a rectangular cross section, for example, a square pipe having a substantially square cross section with a side length W1 of 40 mm, and has an upper wall 40a, a front wall 40b, a rear wall 40c, and a lower wall 40d. And has a closed cross-sectional structure.

  As shown in FIG. 4, an opening end 45 that opens in the vehicle body width direction is formed at the end of the first roof bow 40. Further, brackets 48 each having an L-shaped cross section are fixed to the front wall 40b and the rear wall 40c of the first roof bow 40 by welding.

  As shown in FIG. 5, the first side roof crossbow 41 has a curved shape so as to draw a convex arc between the side roof rail 20 and the first roofbow 40 when viewed from the front-rear direction of the vehicle body. ing. The first side roof crossbow 41 is composed of a crossbow body 50 having a hat-shaped cross section formed by pressing and a reinforcing plate 51.

  The crossbow main body 50 has a shape spreading in a fan shape from one end on the upper side to the other end on the lower side when viewed from the side of the vehicle body 11. The width W2 (shown in FIGS. 2 and 6) of the crossbow main body 50 in the longitudinal direction of the vehicle body is larger than the width W1 of the roof bow 40. The crossbow body 50 has a hat-shaped cross section in the longitudinal direction of the vehicle body. As shown in FIG. 6, the front side wall 50a, the rear side wall 50b, the outer side wall 50c, and both sides in the front and rear direction (front and rear edges) ) And the like are formed.

  As shown in FIG. 5, the reinforcing plate 51 is formed in a curved shape according to the crossbow body 50 when viewed from the front-rear direction of the vehicle body. The reinforcing plate 51 has a size that can close the opening of the hat-shaped cross section of the crossbow body 50. The reinforcing plate 51 is overlapped with the flange portion 55 of the crossbow main body 50, and both are joined by welding, whereby the crossbow main body 50 and the reinforcing plate 51 form a closed cross section. The code | symbol P1 in FIG. 3 has shown an example of the welding part.

  At one end on the upper side of the crossbow main body 50, an insertion portion 60 having a size that can be fitted into the opening end 45 of the first roof bow 40 is formed. The insertion portion 60 has a front wall 61, a rear wall 62, and an upper wall 63, and has a shape with an open bottom surface. The insertion portion 60 is inserted into the opening end 45 of the first roof bow 40 and the periphery of the opening end 45 is welded so that the upper side of the first side roof crossbow 41 is fixed to the first roof bow 40. The code | symbol P2 in FIG. 3 has shown an example of the welding part. Note that the opening end 45 of the first roof bow 40 may be inserted inside the insertion portion 60 of the crossbow body 50. In short, it is only necessary that both ends of the first side roof crossbow 41 are fixed in a state where one end on the upper side of the first side roof crossbow 41 is fitted to the opening end 45 of the first roof bow 40.

  Thus, after the first roof bow unit 31 is manufactured in advance (sub-assembly), for example, by connecting the first side roof crossbow 41 to the first roof bow 40, the first roof bow unit 31 is moved to the side. Coupled to the roof rails 20, 21.

  The width W3 (shown in FIG. 6) of the reinforcing plate 51 in the longitudinal direction of the vehicle body is larger than the width W2 of the crossbow body 50 in the longitudinal direction of the vehicle body. Overhang portions 70 are respectively formed on both sides (front edge portion and rear edge portion) of the reinforcing plate 51 in the longitudinal direction of the vehicle body. The overhanging portion 70 protrudes in the front-rear direction of the vehicle body with respect to the flange portion 55 of the crossbow main body 50. The reinforcing plate 51 is formed with ribs 71 extending in the vertical direction in order to increase bending rigidity.

  A first joining margin 75 is formed at one end on the upper side of the reinforcing plate 51. The lower surface wall 40d of the end portion of the first roof bow 40 is overlapped from above the first joint margin 75, and the first joint margin 75 and the end portion of the roof bow 40 are welded. The code | symbol P3 in FIG. 3 has shown an example of the welding part.

  A second joining margin 76 is formed at the other end on the lower side of the reinforcing plate 51 so as to overlap and be fixed to the inner surface 20a of the side roof rail 20 in the vehicle width direction. The second joining margin 76 protrudes below the lower edge 50 d of the crossbow body 50. The second joining margin 76 is brought into contact with the inner surface 20 a of the side roof rail 20, and the lower edge 50 d of the crossbow body 50 is brought into contact with the upper surface 20 b of the side roof rail 20. Positioning can be performed.

  With the side roof rail 20 and the side roof crossbow 41 thus positioned, the lower edge 50d of the crossbow body 50 and the upper surface 20b of the side roof rail 20 are joined together by welding, The side roof rails 20 are coupled to each other. The code | symbol P4 in FIG. 3 has shown an example of the welding part. The welded part P4 extends over the entire length of the lower edge 50d of the crossbow body 50 in the longitudinal direction of the vehicle body and the entire area of the upper surface 20b of the side roof rail 20 in the vehicle width direction. The second joining margin 76 is welded to the inner surface 20a of the side roof rail 20 over almost the entire region in the longitudinal direction of the vehicle body.

  The basic structure of the second roof bow unit 32 shown in FIG. 7 is the same as that of the first roof bow unit 31 except that the second roof bow unit 32 is larger than the first roof bow unit 31. .

  The second roof bow unit 32 includes a second roof bow 80 and a second side roof crossbow 81. The second roof bow 80 has a pipe shape and extends in the vehicle body width direction. The second roof bow unit 32 is configured by a metal pipe having a rectangular cross section having an outer dimension larger than that of the first roof bow 40. For example, the second roof bow 80 is formed of a square pipe having a substantially square cross section with a side length W5 of 50 mm, and includes an upper wall 80a, a front wall 80b, a rear wall 80c, and a lower wall 80d.

  An opening end 85 that opens toward the vehicle body width direction is formed at the end of the second roof bow 80. Further, brackets 88 each having an L-shaped cross section are fixed to the front wall 80b and the rear wall 80c of the second roof bow 80 by welding.

  The second side roof crossbow 81 has a curved shape so as to draw an outwardly convex arc between the side roof rail 20 and the second roof bow 80 when viewed from the front-rear direction of the vehicle body. The second side roof crossbow 81 is constituted by a crossbow body 90 having a hat-shaped cross section formed by pressing and a reinforcing plate 91.

  When viewed from the side of the vehicle body 11, the crossbow body 90 has a shape that spreads in a fan shape from one end on the upper side to the other end on the lower side. The width W6 (shown in FIG. 7) of the crossbow body 90 in the longitudinal direction of the vehicle body is larger than the width W2 (shown in FIGS. 2 and 6) of the crossbow body 50 of the first side roof crossbow 41. The crossbow main body 90 has a hat-shaped cross section along the longitudinal direction of the vehicle body, and includes a front side wall 90a, a rear side wall 90b, an outer side wall 90c, and flange portions formed on both sides in the front and rear direction (front edge and rear edge). 95 or the like.

  The reinforcing plate 91 is formed in a curved shape according to the crossbow body 90 when viewed from the front-rear direction of the vehicle body. The reinforcing plate 91 has a size capable of closing the opening of the hat-shaped cross section of the crossbow body 90. The cross section of the crossbow main body 90 and the reinforcing plate 91 constitute a closed cross section by superimposing the reinforcing plate 91 on the flange portion 95 of the crossbow main body 90 and joining them together by welding. Symbol P5 in FIG. 7 shows an example of the welded portion.

  At one end on the upper side of the crossbow main body 90, an insertion portion 100 having a size that can be fitted into the open end 85 of the second roof bow 80 is formed. The insertion portion 100 includes a front wall 101, a rear wall 102, and an upper wall 103, and has a shape with an open bottom surface. The insertion portion 100 is inserted into the opening end 85 of the second roof bow 80 and the periphery of the opening end 85 is welded so that the upper side of the second side roof crossbow 81 is fixed to the second roof bow 80. Reference P6 in FIG. 7 shows an example of the welded portion. The opening end 85 of the second roof bow 80 may be inserted into the insertion portion 100 of the crossbow body 90. In short, it is only necessary that both ends of the second side roof crossbow 81 are fixed in a state in which one end on the upper side is fitted to the opening end 85 of the second roofbow 80.

  Thus, after the second roof bow unit 32 is pre-manufactured (sub-assembled) by connecting the second side roof crossbow 81 to the second roof bow 80, etc., the second roof bow unit 32 is moved to the side. Coupled to the roof rails 20, 21.

  The width of the reinforcing plate 91 in the longitudinal direction of the vehicle body is larger than the width W6 of the crossbow body 90 in the longitudinal direction of the vehicle body. Overhang portions 110 are formed on both sides (front edge portion and rear edge portion) of the reinforcing plate 91 in the longitudinal direction of the vehicle body. The overhang portion 110 protrudes in the longitudinal direction of the vehicle body with respect to the flange portion 95 of the crossbow body 90. The reinforcing plate 91 is formed with ribs (not shown) extending in the vertical direction in order to increase bending rigidity.

  A first joining margin 115 is formed at one end on the upper side of the reinforcing plate 91. The lower surface wall 80d of the end portion of the second roof bow 80 is overlapped from above the first joining margin 115, and the first joining margin 115 and the end portion of the roof bow 80 are welded. A symbol P7 in FIG. 7 shows an example of the welded portion.

  A second joining margin 116 is formed at the other end on the lower side of the reinforcing plate 91 so as to overlap and be fixed to the inner surface 20a of the side roof rail 20 in the vehicle width direction. The second joining margin 116 protrudes below the lower edge 90 d of the crossbow body 90. The second joining margin 116 is brought into contact with the inner surface 20 a of the side roof rail 20, and the lower edge 90 d of the crossbow body 90 is brought into contact with the upper surface 20 b of the side roof rail 20, whereby the side roof crossbow 81 is in contact with the side roof rail 20. Positioning can be performed.

  With the side roof rail 20 and the side roof crossbow 81 thus positioned, the lower edge 90d of the crossbow body 90 and the upper surface 20b of the side roof rail 20 are joined together by welding, The side roof rails 20 are coupled to each other. A symbol P8 in FIG. 7 shows an example of the welded portion. The welded part P8 extends over the entire length of the lower edge 90d of the crossbow body 90 in the vehicle front-rear direction and the substantially entire region of the upper surface 20b of the side roof rail 20 in the vehicle width direction. The second joining margin 116 is welded to the inner surface 20a of the side roof rail 20 over almost the entire region in the vehicle front-rear direction.

  Between the first roof bow unit 31 and the second roof bow unit 32 described above, a plurality of stiffeners 35 extending in the vehicle body front-rear direction are arranged. The stiffener 35 includes an upper flange 131, a lower flange 132, and a vertical wall 133 extending in the vertical direction, and has a so-called Z-shaped cross section. As shown in FIG. 3, one end 35 a of the stiffener 35 is fixed to the bracket 48 of the first roof bow unit 31 and the overhanging portion 70 of the first side roof crossbow 41.

  Since the first roof bow 40 is formed of a square pipe having a smaller side size than the second roof bow 80, the lower flange 132 is provided at the lower end wall 40 d of the first roof bow 40 at one end 35 a of the stiffener 35. A stepped portion 140 that is one step higher is formed so as to be aligned with the height. The upper flange 131 of the stiffener 35 is overlaid on the upper surface of the bracket 48, and the lower flange 132 is overlaid on the overhanging portion 70. Then, the upper flange 131 and the bracket 48 are joined to each other by spot welding, and the stepped portion 140 of the lower flange 132 and the second joining margin 76 are spot welded to each other, so that one end portion 35a of the stiffener 35 can be It is fixed to one roof bow unit 31.

  As shown in FIG. 7, the other end 35 b of the stiffener 35 is fixed to the bracket 88 of the second roof bow unit 32 and the protruding portion 110 of the second side roof crossbow 81. Since the second roof bow 80 is larger in size on one side than the first roof bow 40, it is not necessary to provide the step portion 140 on the lower flange 132 of the stiffener 35, and the lower wall 80 d and the lower flange 132 of the second roof bow 80 are not provided. The height is aligned.

  The upper flange 131 of the stiffener 35 is overlaid on the upper surface of the bracket 88, and the lower flange 132 is overlaid on the overhanging portion 110. Then, the upper flange 131 and the bracket 88 are joined to each other by spot welding, and the lower flange 132 and the second joining margin 116 are spot welded to each other, so that the other end 35b of the stiffener 35 becomes the second roof bow unit. 32.

  As described above, according to the roof portion 12 of the present embodiment, the insertion portions 60 and 100 of the side roof crossbows 41 and 81 are inserted (fitted) into the open ends 45 and 85 of the roof bows 40 and 80, respectively. Since the roof bows 40 and 80 and the side roof crossbows 41 and 81 are welded, the rigidity of the joint between the roofbows 40 and 80 and the side roof crossbows 41 and 81 is large. Therefore, it is not necessary to use the roof rail 3 as in the conventional example shown in FIG. 8, and the roof bows 40 and 80 and the side roof crossbows 41 and 81 are directly coupled. Therefore, compared with the conventional example, the number of welding points is reduced, and it is advantageous for ensuring the welding quality. Further, it can be made lighter than the conventional roof portion.

  Further, in the joint portion (FIG. 3) between the side roof rail 20 and the first roof bow unit 31, the lower edge 50d of the first side roof cross bow 41 is abutted against the upper surface 20b of the side roof rail 20 from above, and the reinforcing plate Since the lower edge 50d of the side roof crossbow 41 is welded to the side roof rail 20 in a state where the second joining margin 76 of 51 is abutted against the inner surface 20a of the side roof rail 20, the side roof crossbow 20 is welded to the side roof rail 20. 41 can be coupled to the correct location.

  Similarly, in the joint portion (FIG. 7) between the second roof bow unit 32 and the side roof rail 20, the lower edge 90d of the second side roof cross bow 81 abuts against the upper surface 20b of the side roof rail 20 from above, and the reinforcing plate Since the lower edge 90d of the side roof crossbow 81 is welded to the side roof rail 20 in a state where the second joining margin 116 of 91 is abutted against the inner surface 20a of the side roof rail 20, the side roof crossbow 20 is welded to the side roof rail 20. 81 can be coupled to the correct location.

  The side roof crossbows 41 and 81 have a shape in which the width in the longitudinal direction of the vehicle body extends in a fan shape from one end on the upper side to the other end on the lower side, so that the lower edge 50d of the side roof crossbows 41 and 81 with respect to the side roof rail 20 The bonding length of 90d can be increased, which is also effective in reducing the stress at the bonding portion.

  Moreover, the welded portions P4 and P8 between the side roof rail 20 and the lower edges 50d and 90d of the side roof crossbows 41 and 81 extend over substantially the entire region of the upper surface 20b of the side roof rail 20 in the vehicle body width direction. For this reason, the side roof rail 20 and the side roof crossbows 41 and 81 are coupled to a load caused by a push-up from the lower side that is input from the wind pillar 22 to the side roof crossbows 41 and 81 via the side roof rail 20 and a torsional load. The stress acting on the portion can be reduced, and twisting, bending, and the like can be absorbed in the longitudinal intermediate portion of the roof bows 40 and 80.

  For this reason, the rigidity of the roof portion is ensured in a vehicle body having a large roof portion like a high decker vehicle, so that a vehicle body that is strong against inputs such as torsion can be obtained, and good characteristics against vibration can be obtained. be able to.

  Needless to say, in carrying out the present invention, the structure and arrangement of the components of the present invention including the side roof rail, the roof bow, and the side roof crossbow can be appropriately changed. Further, the form of the vehicle body is not limited to the above embodiment, and various modifications can be made.

The perspective view of the vehicle which fractures | ruptures and shows a part of roof part which concerns on one Embodiment of this invention. FIG. 2 is a perspective view of a part of the roof portion of the vehicle shown in FIG. 1. The perspective view which expands and shows a part of 1st roof bow unit of the roof part shown by FIG. The perspective view which decomposes | disassembles and shows the 1st roof bow unit shown by FIG. The front view of the 1st roof bow unit shown by FIG. FIG. 4 is an exploded perspective view showing a crossbow body and a reinforcing plate of the first roof bow unit shown in FIG. 3. The perspective view which expands and shows a part of 2nd roof bow unit of the roof part shown by FIG. The perspective view of a part of conventional roof part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 ... Vehicle body 12 ... Roof part 20, 21 ... Side roof rail 31 ... 1st roof bow unit 32 ... 2nd roof bow unit 35 ... Stiffener 40 ... 1st roof bow 41 ... 1st side roof crossbow 50 ... Crossbow main body DESCRIPTION OF SYMBOLS 51 ... Reinforcing plate 75 ... 1st joining margin 76 ... 2nd joining margin 80 ... 2nd roof bow 81 ... 2nd side roof crossbow 90 ... Crossbow main body 91 ... Reinforcement plate 115 ... 1st joining margin 116 ... 2nd joining margin

Claims (3)

A pair of left and right pipe-shaped side roof rails extending in the longitudinal direction of the vehicle body on both sides of the roof portion of the vehicle body, each having a rectangular closed cross-sectional structure;
A plurality of pipes extending in the vehicle body width direction between the pair of side roof rails and arranged at intervals in the vehicle body front-rear direction, each having a closed cross-sectional structure and having an opening end that opens in the vehicle body width direction. And the roof bow,
Between the roof bow and the side roof rail is arranged in a curved shape when viewed from the front-rear direction of the vehicle body, and when viewed from the side of the vehicle body, the shape extends in a fan shape from one end on the upper side to the other end on the lower side, and A side roof crossbow having a closed cross-sectional structure, wherein the one end is fixed in a state of being fitted to the opening end of the roof bow, and the other end is fixed to the side roof rail;
A roof structure of a vehicle body characterized by comprising:   2. The roof structure for a vehicle body according to claim 1, wherein a lower edge of the other end of the side roof crossbow is welded to an upper surface of the side roof rail over substantially the entire region in the vehicle body width direction. The side roof crossbow is
A crossbow body having a hat-shaped cross section along the vehicle longitudinal direction and having flange portions on both sides in the vehicle longitudinal direction;
A reinforcing plate that closes the opening of the cross section of the crossbow body by overlapping and fixing on the lower surface side of the crossbow body,
The width of the reinforcing plate in the longitudinal direction of the vehicle body is larger than the width of the crossbow body in the longitudinal direction of the vehicle body, and has a projecting portion protruding from the flange portion on both sides of the reinforcing plate in the longitudinal direction of the vehicle body. And having a first joining margin for fixing the lower surface of the roof bow in an overlapping manner, and a second joining margin for fixing the lower portion of the reinforcing plate to the inner surface of the side roof rail in the vehicle width direction. The roof structure of a vehicle body according to claim 1 or 2.

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