JP2013028216A - Roof structure for vehicle body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a center pillar or the like from entering a vehicle when the vehicle has a side crash.SOLUTION: The roof structure for a vehicle body includes: roof side rails 20 longitudinally extending at both sides of the vehicle body in the width direction; a roof reinforcement 41 for supporting a roof panel of the vehicle body; and a mounting bracket 45 for coupling the roof reinforcement 41 with the roof side rails 20. In the structure, a stiffness releasing part for promoting the deformation of the mounting bracket 45 in the vehicle width direction or the relative displacement of the mounting bracket 45 with respect to the roof reinforcement 41 caused by the application of a predetermined side collision load is arranged between a mounting bracket 45 from the top of the upwardly-protruding mounting bracket 45 and the connection periphery with the roof reinforcement 41.

Description

  A vehicle body comprising a roof side rail extending in the front-rear direction on both sides in the width direction of the vehicle body, a roof reinforcement that supports a roof panel of the vehicle body, and a mounting bracket that connects the roof reinforcement and the roof side rail. This relates to the roof structure.

A technique relating to a roof structure of a vehicle body is described in Patent Document 1.
As shown in FIG. 12, the roof structure of a vehicle body described in Patent Document 1 is spanned between a roof side rail 101 that extends in the front-rear direction on both sides in the width direction of the vehicle body, and the left and right roof side rails 101. A roof reinforcement 104 that supports the roof panel 102, and a mounting bracket 106 that connects the roof reinforcement 104 and the roof side rail 101 are provided.
When the roof is assembled to the vehicle body, first, the base end portion 106k of the mounting bracket 106 is bolted to the left and right roof side rails 101. Next, the roof panel 102 and the roof reinforcement 104 are set from above between the left and right roof side rails 101, and the roof reinforcement 104 and the tip end portion 106s of the mounting bracket 106 are bolted. Thereby, the roof side rail 101 and the roof reinforcement 104 are connected by the mounting bracket 106.

JP 2010-254225 A

When the vehicle having the above configuration is subjected to a side collision and a collision load F is applied to the center pillar 107 as shown by the white arrow in FIG. 12, the collision load is transmitted from the center pillar 107 to the roof side rail 101 and mounted. It is transmitted to the roof reinforcement 104 via the bracket 106. At this time, the connecting portion C1 between the roof side rail 101 and the mounting bracket 106 and the connecting portion C2 between the mounting bracket 106 and the roof reinforcement 104 are displaced by a dimension H in the height direction. In contrast, a bending moment in the counterclockwise direction (see white arrow) in FIG. 12 is input.
Thereby, the mounting bracket 106 may be deformed (opening deformation) in a direction away from the joint surface of the roof reinforcement 104, and the bolt may be broken. When the bolt breaks, the connection between the mounting bracket 106 and the roof reinforcement 104 is released, so that the amount of the center pillar 107 and the roof side rail 101 entering the vehicle interior increases.

  The present invention has been made to solve the above-described problems, and the problem to be solved by the present invention is to suppress entry of a center pillar or the like into a vehicle compartment at the time of a vehicle side collision.

The above-described problems are solved by the inventions of the claims.
The invention of claim 1 includes a roof side rail extending in the front-rear direction on both sides in the width direction of the vehicle body, a roof reinforcement that supports a roof panel of the vehicle body, a mounting bracket that connects the roof reinforcement and the roof side rail, The roof structure of the vehicle body is provided with a predetermined side collision load between the top portion of the upwardly projecting mounting bracket and the connecting peripheral portion of the mounting bracket and the roof reinforcement. Further, the present invention is characterized in that a rigidity lowering portion is provided that promotes deformation of the mounting bracket in the vehicle width direction or relative displacement of the mounting bracket with respect to the roof reinforcement.

  According to the present invention, a bending moment input to a connecting portion between the mounting bracket and the roof reinforcement can be reduced by deforming the rigidity-decreasing portion under a side collision load. Thereby, the connection state of the connection part of a mounting bracket and roof reinforcement comes to be maintained. Thus, since the connection state of the mounting bracket and the roof reinforcement is maintained, entry of the center pillar or the like into the vehicle compartment at the time of a vehicle side collision can be suppressed.

According to a second aspect of the present invention, in the first aspect of the invention, the rigidity-reducing portion includes a means for allowing the relative displacement of the peripheral portion of the connection between the mounting bracket and the roof reinforcement. To do.
Accordingly, the mounting bracket can be displaced in the direction of the side collision load with respect to the roof reinforcement, and the bending moment input to the connecting portion between the mounting bracket and the roof reinforcement can be reduced. As a result, the connection state of the connection part of the mounting bracket and the roof reinforcement is ensured.

According to a third aspect of the present invention, in the first aspect of the present invention, the rigidity reduction portion includes a means for urging deformation of the top portion of the mounting bracket.
Thereby, the bending moment input into the connection part of a mounting bracket and roof reinforcement can be made small efficiently.

According to a fourth aspect of the present invention, in the first aspect of the invention, the rigidity reduction portion includes means for urging deformation of the connection peripheral portion of the mounting bracket or means for urging deformation of the connection peripheral portion of the roof reinforcement. It is characterized by that.
Thereby, the bending moment input into the connection part of a mounting bracket and roof reinforcement can be made small efficiently.

  According to the present invention, it is possible to suppress the amount of entry of a center pillar or the like into a vehicle compartment at the time of a vehicle side collision.

It is a model perspective view of a vehicle body provided with the roof structure which concerns on Embodiment 1 of this invention. It is an II-II arrow expanded sectional view of FIG. (A) is a top view showing the roof structure of the vehicle body concerning Embodiment 1, (B) is an BB arrow expanded sectional view of (A), (C) is a CC arrow expanded cross section of (A). It is. (A) is a perspective view showing the roof structure of the vehicle body according to the first embodiment, (B) and (C) are perspective views seen from different directions of the mounting bracket and the roof reinforcement, and (D) is D of (A). -D is an enlarged sectional view taken along arrow D. FIG. (A) is sectional drawing which shows a mode when the side collision load is added to the mounting bracket and roof reinforcement of the roof structure of the vehicle body which concern on Embodiment 1, (B) is the mounting bracket and roof of the conventional roof structure It is sectional drawing which shows a mode when the side collision load is added to reinforcement. (A) (B) is the perspective view seen from the direction from which the roof structure of the vehicle which concerns on the modification of Embodiment 1 differs. (A)-(C) are the principal part longitudinal cross-sectional views of the roof structure of the vehicle body which concerns on the modification of Embodiment 1. FIG. It is a model perspective view of the roof part of a vehicle body provided with the roof structure of the vehicle body which concerns on Embodiment 2 of this invention. It is the model perspective view which looked at the roof part of the vehicle body provided with the roof structure which concerns on Embodiment 2 from the indoor side. 8A is a cross-sectional view taken along arrows XX in FIG. 8 and FIG. 9, FIG. 9B is an enlarged view of the BR portion in FIG. 8A and its vicinity, and FIG. It is a longitudinal cross-sectional view which shows the effect | action of the roof structure of the vehicle body which concerns on Embodiment 2. FIG. It is a longitudinal cross-sectional view showing the roof structure of the conventional vehicle body.

[Embodiment 1]
Hereinafter, a vehicle body roof structure according to Embodiment 1 of the present invention will be described with reference to FIGS.
Here, front and rear, right and left and up and down in the figure correspond to front and rear, left and right and up and down of the vehicle body.

<About the roof structure of the car body>
As shown in FIG. 1, roof side rails 20 extending in the front-rear direction are provided on the roof portion of the vehicle body 10 at positions on both sides in the vehicle width direction.
The roof side rail 20 includes a panel-shaped roof side rail inner 22, a roof side rail outer 25, and a roof side rail outer 25 as shown in FIG. It is comprised from the roof side rail reinforcement 24 joined inside. And the cylindrical roof side rail 20 is formed by joining the flange part 22f formed in the both ends edge of the roof side rail inner 22, and the flange part 25f formed in the both end edges of the roof side rail outer 25. As shown in FIG. The
As shown in FIG. 1, the front side of the roof side rail 20 is supported by a front pillar (not shown), the center is supported by a center pillar 30, and the rear end is supported by a rear pillar 39. As shown in FIG. 2, the center pillar 30 is formed in a cylindrical shape by a center pillar inner 32 and a center pillar reinforcement 34. The upper end portion of the center pillar inner 32 is joined to the inner side surface in the vehicle width direction of the roof side rail inner 22, and the upper end portion of the center pillar reinforcement 34 is joined to the front side in the vehicle width direction of the roof side rail outer 25. .
The outer side of the center pillar reinforcement 34 in the vehicle width direction is covered with an outer panel 36.

An inflator 15 for a curtain airbag is attached to the inside of the roof side rail 20 in the vehicle width direction as shown in FIG. The inflator 15 is a cylindrical member for inflating the airbag, and is disposed along the roof side rail 20 at substantially the same height as the roof side rail 20.
Further, between the roof side rails 20 on both sides (left and right) in the vehicle width direction, a roof reinforcement 41 extending in the vehicle width direction and both ends of the roof reinforcement 41 are connected to the left and right roof side rails 20 respectively. A mounting bracket 45 is provided. The roof panel 43 is supported by a support bracket 43s (see FIG. 2) fixed on the roof reinforcement 41.

<About mounting bracket 45>
The mounting bracket 45 is a member that connects the roof reinforcement 41 to the roof side rail inner 22 of the roof side rail 20 in a state where the curtain airbag inflator 15 is avoided in the height direction.
As shown in FIGS. 2 to 4, the mounting bracket 45 includes a bracket main body 450 formed in a substantially semi-cylindrical shape protruding upward so as to surround the inflator 15 from above, and the bracket main body 450. A first flange portion 451 formed on one circumferential side end (roof side rail 20 side) and a second flange portion 452 formed on the other circumferential end side (roof reinforcement 41 side) of the bracket main body 450. It consists of and.

  As shown in the plan view of FIG. 3A, the bracket body 450 has a length dimension (front-rear dimension) on the first flange part 451 side that is longer than a length dimension (front-rear dimension) on the second flange part 452 side. It is set large. The rear ends of the first flange portion 451 and the second flange portion 452 are aligned on the rear end side of the bracket main body 450 (the left end side in FIG. 3A). For this reason, the front end (right end in FIG. 3A) of the bracket main body 450 is formed so as to be inclined rearward in the drawing from the first flange portion 451 side to the second flange portion 452 in plan view. 4B. As shown in FIG. 4D and the like, the protrusions 450b and 450f bent into a substantially trapezoidal cross section are formed in the circumferential direction of the bracket main body 450. It is formed to extend. Here, the protruding portions 450b and 450f are continuously provided from the position of the first flange portion 451 to the position of the second flange portion 452, and the top portion T of the bracket main body portion 450 (see FIG. 3C). ) Is set so that the concavity and convexity become smaller. For this reason, the top portion T of the bracket main body 450 is less rigid than the other portions, and the top portion T of the bracket main body 450 is easily crushed between the first flange portion 451 and the second flange portion 452. Yes.

The first flange portion 451 of the mounting bracket 45 is a portion for bolting the mounting bracket 45 to the roof side rail inner 22 of the roof side rail 20.
As shown in FIG. 3C, the first flange portion 451 is a bracket main body portion adapted to the inclination of the roof side rail inner 22 so that surface contact is possible with the inner side surface of the roof side rail inner 22 in the vehicle width direction. It is formed to extend in the tangential direction of 450. Further, as shown in FIGS. 3 (A) and 4 (C), the first flange portion 451 is divided into a front portion long in the front-rear direction and a short rear portion in the front-rear direction by the notch portion 451c. Two bolt holes 451h and one bolt hole 451h are formed at the rear part.
And the bolt hole 451h of the front end of the 1st flange part 451 and the bolt hole 451h of the rear end are each formed in the position of the protrusion parts 450f and 450b.

The second flange portion 452 of the mounting bracket 45 is a portion for supporting the roof reinforcement 41 from below and bolting the mounting bracket 45 to the roof reinforcement 41.
As shown in FIG. 3C, the second flange portion 452 is bent in the radial direction with respect to the bracket body portion 450 so as to be able to make surface contact with the lower surface of the roof reinforcement 41. Further, as shown in FIGS. 3A and 4B, the second flange portion 452 is divided into a front portion and a rear portion by a notch portion 452c. And the front part and rear part of the 2nd flange part 452 are provided in the position of the protrusion part 450f, 450b, respectively. Bolt holes 452h are formed in the front portion and the rear portion of the second flange portion 452, respectively.

<About roof reinforcement 41>
The roof reinforcement 41 is a member that supports the roof panel 43 and the like and supports the roof side rail 20 and the center pillar 30 from the vehicle width inner side direction when the vehicle body 10 receives a side collision load. In the roof reinforcement 41, as shown in FIG. 3A and the like, three protrusions 41t extending from one end side to the other end side in the longitudinal direction, and a straight groove 41m provided between the protrusions 41t. Are formed, and the cross-sectional shape is formed in a substantially waveform. Thereby, the intensity | strength of the roof reinforcement 41 with respect to a side collision load improves.
Both end portions in the longitudinal direction of the roof reinforcement 41 are formed to be slightly wider than the other portions, and the second flange portion 452 of the mounting bracket 45 is a flange portion 410 fixed from below.
The flange portion 410 of the roof reinforcement 41 is formed with a semicircular cutout portion 412 at a substantially central position in the front-rear direction. FIG. 4B shows the protrusion 41t of the flange portion 410 located on the front side of the notch portion 412 and the protrusion 41t of the flange portion 410 located on the rear side of the notch portion 412. Thus, a bolt hole 410h is formed. The bolt hole 410h of the flange portion 410 is positioned so as to overlap with the bolt hole 452h of the second flange portion 452 of the mounting bracket 45 as shown in FIG.

<Assembly of mounting bracket 45, etc.>
As shown in FIG. 3C, the mounting bracket 45 has a bolt hole 451 h (see FIG. 3A) of the first flange portion 451 of the mounting bracket 45, and the roof side rail inner 22 of the roof side rail 20. The first flange portion 451 and the roof side rail inner 22 are bolted in accordance with the bolt holes (not shown), thereby being fixed to the roof side rail 20. As a result, the inflator 15 is surrounded by the mounting bracket 45 from above.
Next, the flange portion 410 of the roof reinforcement 41 is placed on the second flange portion 452 of the mounting bracket 45, and the bolt holes 410h and 452h are aligned with each other. In this state, the roof reinforcement 41 is fixed to the mounting bracket 45 by connecting the second flange portion 452 of the mounting bracket 45 and the flange portion 410 of the roof reinforcement 41 with bolts and nuts BR.
As described above, the second flange portion 452 of the mounting bracket 45 is formed with the notch portion 452c, and the flange portion 410 of the roof reinforcement 41 is also formed with the notch portion 412. Therefore, an opening H is formed between the mounting bracket 45 and the roof reinforcement 41 in a state where the mounting bracket 45 and the roof reinforcement 41 are connected.
Here, the bending strength of the second flange portion 452 of the mounting bracket 45 is set to be smaller than the connection strength between the mounting bracket 45 and the roof reinforcement 41 by the bolt and nut BR.

<About the operation of the vehicle body provided with the roof structure according to the present embodiment>
When a side collision load F (see a white arrow in FIG. 1) is applied to the vehicle body 10 having the roof structure according to the present embodiment, the collision load F is transmitted from the center pillar 30 to the roof side rail 20. Then, as shown in FIG. 5 (A), the roof side rail 20 is joined to the roof reinforcement 41 via the mounting bracket 45. At this time, the connecting portion Z between the roof side rail 20 and the mounting bracket 45 and the connecting portion (bolt & nut) BR between the mounting bracket 45 and the roof reinforcement 41 are displaced in the height direction. In FIG. 5A, a counterclockwise bending moment is applied to the connecting portion (bolt & nut) BR.
However, since the strength of the second flange portion 452 of the mounting bracket 45 is set smaller than the connection strength between the mounting bracket 45 and the roof reinforcement 41 by the bolt and nut BR, the mounting bracket is caused by the bending moment. The second flange portion 452 of 45 is deformed. Furthermore, since the top portion T of the bracket main body 450 of the mounting bracket 45 is easily crushed between the first flange portion 451 and the second flange portion 452, the top portion T is crushed by the collision load F. . As a result, as shown in FIG. 5B, the joint surface 45s of the mounting bracket 45 is deformed in the direction away from the joint surface 41s of the roof reinforcement 41, as in the case where the strength of the mounting bracket 45 is high. Thus, the bolt and nut BR will not break.
As a result, the entry of the center pillar 30 and the like into the vehicle compartment at the time of a vehicle side collision can be suppressed.
That is, the second flange portion 452 of the mounting bracket 45 and the top portion T of the bracket main body portion 450 correspond to the rigidity reduced portion in the present invention. Further, the second flange portion 452 of the mounting bracket 45 and the vicinity thereof, the flange portion 410 of the roof reinforcement 41 and the vicinity thereof, and the like correspond to the connection peripheral portion of the mounting bracket 45 and the roof reinforcement 41 of the present invention.

<Advantages of the roof structure of the vehicle body according to this embodiment>
According to the roof structure of the vehicle body according to the present embodiment, the mounting bracket 45 is deformed when a side collision load F against the vehicle body 10 is applied to the mounting bracket 45 and the roof reinforcement 41 via the roof side rail 20. Thus, the connection state of the connection part BR between the mounting bracket 45 and the roof reinforcement 41 is maintained. Thus, since the connection state of the mounting bracket 45 and the roof reinforcement 41 is not released, it is possible to suppress entry of the center pillar 30 or the like into the vehicle compartment at the time of a vehicle side collision.
That is, since the reduced rigidity portion of the mounting bracket 45 can be deformed by receiving a side collision load, the bending moment input to the connection portion BR between the mounting bracket 45 and the roof reinforcement 41 can be reduced. As a result, the connection state of the connection part of the mounting bracket 45 and the roof reinforcement 41 is ensured.

<Example of change>
Here, the present invention is not limited to the above-described embodiment, and can be modified without departing from the gist of the present invention. For example, in Embodiment 1, as shown in FIG. 4 etc., the example which forms the protrusion parts 450f and 450b extended in the circumferential direction in the front-end edge and rear-end edge of the mounting bracket 45 was shown. However, as shown in FIGS. 6A and 6B, the protrusion 450c is formed in the central portion of the mounting bracket 45 so as to extend in the circumferential direction, and the rigidity-reducing portion is positioned away from the protrusion 450c. A configuration in which a certain second flange portion 452 is provided is also possible. Thereby, the 2nd flange part 452 becomes still easier to deform | transform.
Further, in the first embodiment, as shown in FIG. 4D, an example in which the protrusions 450f and 450b are shallowly formed at the top portion T of the bracket main body 450 to form a rigidity reduced portion is shown. However, as shown in FIG. 6B, the notch 451c of the first flange portion 451 of the mounting bracket 45 can be enlarged to reduce the rigidity of the top portion T of the bracket body 450. .

Further, as shown in FIG. 7A, a bead 453m extending in the axial direction (front-rear direction) of the mounting bracket 45 is formed at a boundary position 453 between the second flange portion 452 of the mounting bracket 45 and the bracket main body 450. In addition, this portion can also be used as a reduced rigidity portion. Further, as shown in FIG. 7B, slits 453s can be partially formed instead of the beads 453m.
Further, as shown in FIG. 7C, a bead 415m extending in the width direction (vehicle longitudinal direction) of the roof reinforcement 41 is provided at a position 415 in the vicinity of the flange portion 410 of the roof reinforcement 41, and this portion is provided as a rigidity reduction portion. It is also possible.

[Embodiment 2]
Hereinafter, a vehicle body roof structure according to Embodiment 2 of the present invention will be described with reference to FIGS.
The roof structure of the vehicle body according to the present embodiment is an example in which the present invention is applied to a vehicle having a panoramic roof structure in which a window W is provided on the roof. In the case of the first embodiment, the mounting bracket 60 and the roof reinforcement 70 are used. The configuration is different. Note that members that are the same as those described in the vehicle body roof structure of Embodiment 1 are given the same reference numerals, and descriptions thereof are omitted.
The roof reinforcement 70 is a member of a window frame that supports the roof panel 43, and as shown in FIG. 10A, the outer frame portion 72 formed in a cross-sectional groove shape and the inner frame formed in a protrusion shape. Part 74.
As shown in FIG. 10 (A) and the like, the mounting bracket 60 has a bracket body portion 62 formed in a substantially inverted U-shaped cross section, and one end in the circumferential direction of the bracket body portion 62 (on the roof side rail 20 side). The first flange portion 64 is formed, and the second flange portion 66 is formed on the other circumferential end side (roof reinforcement 70 side) of the bracket body portion 62. The first flange portion 64 of the mounting bracket 60 is configured to be bolted to the roof side rail inner 22 of the roof side rail 20.

  The second flange portion 66 of the mounting bracket 60 is a portion for supporting the outer frame portion 72 of the roof reinforcement 70 from below and fixing the mounting bracket 60 to the outer frame portion 72 with bolts and nuts. As shown in FIGS. 10B and 10C, the second flange portion 66 is formed with a long hole 66b extending in the vehicle width direction at a position corresponding to the bolt hole 72b of the outer frame portion 72 of the roof reinforcement 70. ing. The outer frame portion 72 of the roof reinforcement 70 and the mounting bracket 60 are in a state where the bolt holes 72b of the outer frame portion 72 of the roof reinforcement 70 are aligned with the elongated holes 66b of the second flange portion 66 of the mounting bracket 60. The second flange portion 66 is fixed by a bolt and nut BR.

Thus, since the elongated hole 66b extending in the vehicle width direction is formed in the second flange portion 66 of the mounting bracket 60, the collision load F is mounted via the roof side rail 20 as shown in FIG. When added to the bracket 60, the mounting bracket 60 can be displaced in the direction of the collision load F with respect to the roof reinforcement 70 by the action of the long hole 66b. For this reason, the bending moment input into the connection part (bolt & nut BR) of the mounting bracket 60 and the roof reinforcement 70 can be made small. As a result, the connection state of the mounting bracket 60 and the roof reinforcement 70 is ensured.
In addition, although the long hole 66b was formed in the 2nd flange part 66 of the mounting bracket 60, and the bolt hole 72b was formed in the outer frame part 72 of the roof reinforcement 70, the long hole, Bolt holes may be formed in the second flange portion 66.
Further, between the top part of the mounting bracket formed to be convex upward and the peripheral part of the connection with the roof reinforcement, the first embodiment and the modified examples of the first embodiment, and the rigidity reduced as exemplified in the second embodiment. By forming at least one, the amount of entry into the vehicle interior of the center pillar or the like at the time of a vehicle side collision can be suppressed.

20 .... roof side rail 30 ... center pillar 41 ... roof reinforcement 415m ... bead (rigidity reduced part)
45 ··· Mounting bracket 450 ··· Bracket body T · Top portion (rigidity reduced portion)
452 ... 2nd flange part (rigidity reduction part)
453s ・ ・ Slit (Rigidity reduction part)
453m ・ ・ Bead (Rigidity reduction part)
60 ... Mounting bracket 70 ... Roof reinforcement BR ... Bolt & nut BR ... Connected part

Claims (4)

A roof structure of a vehicle body comprising a roof side rail extending in the front-rear direction on both sides in the width direction of the vehicle body, a roof reinforcement that supports the roof panel of the vehicle body, and a mounting bracket that connects the roof reinforcement and the roof side rail. There,
A predetermined side collision load is applied between the top portion of the upwardly projecting mounting bracket and the periphery of the connection between the mounting bracket and the roof reinforcement. A roof structure for a vehicle body, comprising a rigidity reduction portion that facilitates deformation or relative displacement of the mounting bracket with respect to the roof reinforcement. The vehicle body roof structure according to claim 1,
The vehicle body roof structure according to claim 1, wherein the rigidity lowering portion includes means for allowing relative displacement between the mounting bracket and the roof reinforcement at a peripheral portion of the connection. The vehicle body roof structure according to claim 1,
The roof structure of a vehicle body, wherein the rigidity reduction portion includes means for urging deformation of a top portion of the mounting bracket. The vehicle body roof structure according to claim 1,
The roof structure of a vehicle body, wherein the rigidity reduction portion includes means for urging deformation of a connection peripheral portion of the mounting bracket, or means for accelerating deformation of a connection peripheral portion of the roof reinforcement.

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