JP4828573B2 - Body superstructure - Google Patents

Description

  The present invention relates to a vehicle body upper structure in which left and right rear pillars extend downward from rear portions of left and right side rails, and the left and right side rails are connected by rear rails in the vehicle width direction.

As a vehicle body upper structure, a structure in which a retractor for a rear seat belt is arranged around a side rail, a rear rail, and a rear pillar is known.
This type of vehicle upper structure is used when, for example, a three-point rear seat belt is used for the center seat of the rear seat of a wagon car, etc., and the rigidity around the side rail, rear rail, and rear pillar is ensured as appropriate. It was designed to do.
In a wagon car or the like, generally, an A pillar (front pillar), a B pillar (center pillar), a C pillar, and a D pillar (rear pillar) are provided on both sides from the front of the vehicle body.

As such a vehicle body upper structure, a structure in which retractors are arranged on side rails and rear rails via brackets is known (see, for example, Patent Document 1).
Japanese Patent No. 3716400

  The vehicle body upper structure of Patent Document 1 includes left and right side rails provided in the vehicle body longitudinal direction at the upper part of the vehicle body, left and right rear pillars extending downward from the rear portions of these side rails, and A rear rail that connects the side rails in the vehicle width direction, a bracket passed to a corner portion of the right side rail and the rear rail, and a retractor attached to the bracket.

However, in the superstructure of the vehicle body, it is not possible to say that the rigidity of the bracket is simply sufficient by bending the plate material. For example, the bracket is bent by the tension of the rear seat belt.
Further, in the vehicle body superstructure, since the bracket is passed to the corner portion of the right side rail and the rear rail, the rear seat needs to be set rearward, and the space of the luggage compartment may be compressed. In order to set the rear seat forward, it is necessary to newly provide a rear seat belt guide and the like, and in order to attach the guide, a further reinforcing member is required, which may cause an increase in cost.

  The present invention can sufficiently secure the rigidity around the side rails, the rear rails, and the rear pillars, and can impose restrictions on the position of the rear seats even when a three-point rear seat belt is adopted for the center seat of the rear seats. It is an object of the present invention to provide a vehicle body superstructure capable of ensuring a sufficient degree of design freedom.

The invention according to claim 1 includes left and right side rails provided in the vehicle longitudinal direction at the upper part of the vehicle body,
In a vehicle body upper structure comprising left and right rear pillars extending downward from the rear portions of these side rails, and rear rails connecting the left and right side rails in the vehicle width direction in the vicinity of the upper ends of these rear pillars, A bracing member having a closed cross-section that diagonally connects is provided, and a belt guide for a rear seat belt that restrains the occupant of the rear seat is disposed on the bracing member. It has a closed cross section with a concave bottom plate, and has a closed cross section in the shape of a box when viewed from the rear rail, and one end of the bracing member is joined to the upper flange of the side rail by overlapping the upper and lower plates. The upper plate is joined to the upper part of the rear rail, and the lower plate is joined to the front wall or lower wall of the rear rail. Closed section of the brace member is characterized Rukoto is joined to the closed section.

  The invention according to claim 2 is characterized in that one end of the bracing member is connected to the side rail in the vicinity of the C pillar disposed immediately before the rear pillar.

The invention according to claim 3 is characterized in that the retractor of the rear seat belt is disposed behind the rear rail.

In the invention according to claim 1, left and right side rails are provided in the longitudinal direction of the vehicle body at the upper part of the vehicle body, and left and right rear pillars are respectively extended downward from the rear portions of the side rails. The side rail is connected to the rear rail in the vehicle width direction.
Since a bracing member having a closed cross section that obliquely connects the rear rail and the side rail is provided, the rear rail and the side rail, which are the main skeleton of the body, can be connected in the shortest distance. As a result, it is possible to reinforce the upper portion of the vehicle body while minimizing the increase in weight.
Since the belt guide for the rear seat belt that restrains the occupant of the rear seat is disposed on the brace member, the tension of the rear seat belt can be sufficiently supported, and bending of the upper part of the vehicle body can be prevented. Accordingly, even when a three-point rear seat belt is adopted for the center seat of the rear seat, there is no restriction on the position of the rear seat, and a sufficient degree of design freedom can be ensured.
Further, the bracing member has a closed cross section in which a flat plate-like upper plate and a lower plate having a concave shape in the cross-sectional view of the upward opening are joined, and the rear rail has a closed cross-section in the shape of a box in cross-sectional view.
Since one end of the bracing member is joined to the upper flange of the side rail by overlapping the upper plate and the lower plate, for example, the groove portion for attaching the roof molding is not blocked. Thereby, the freedom degree of a design can be improved without imposing restrictions on body design.
Furthermore, the upper plate is joined to the upper part of the rear rail, and the lower plate is joined to the front wall or the lower wall of the rear rail, and the closed cross section of the brace member is joined to the closed cross section of the rear rail. Therefore, the rear rail and the bracing member have an integral reinforcing member function, and even when a load acts on the bracing member from the rear seat belt, the bracing member can sufficiently support the bracing member. As a result, the rigidity of the upper part of the vehicle body can be improved.

  In the invention according to claim 2, since one end of the bracing member is connected to the side rail in the vicinity of the C pillar disposed immediately before the rear pillar, the load applied to the side rail from the rear seat belt is received by the rear pillar via the rear rail. Can be received by the C pillar through the bracing member. In other words, the load applied to the side rail from the rear seat belt can be distributed and received by the rear pillar and the C pillar, and the side rail can be prevented from being bent.

In the invention according to claim 3 , since the retractor of the rear seat belt is disposed behind the rear rail, the closed section of the rear rail can be enlarged. As a result, the load from the rear seat belt can be sufficiently supported, and the vehicle body upper structure can be strengthened.

The best mode for carrying out the present invention will be described below with reference to the accompanying drawings. The drawings are viewed in the direction of the reference numerals.
1 is a perspective view of a vehicle body upper structure according to the present invention, FIG. 2 is a plan view of the vehicle body upper structure shown in FIG. 1, and FIG. 3 is a bottom view of the vehicle body upper structure shown in FIG. is there.

  As shown in FIG. 1 to FIG. 3, the vehicle body upper structure includes left and right side rails 13 and 13 (one not shown) provided in the vehicle front-rear direction at the upper part of the vehicle body, and downward from these side rails 13 and 13. The left and right rear pillars (D pillars) 15 and 15 (one not shown), the rear rail 16 connected to the left and right side rails 13 and 13 in the vehicle width direction, and the rear rail 16 and the right side rail 13 are connected to the vehicle body. A bracing member 17 that is obliquely connected to the front and increases the rigidity of the rear rail 16 and the right side rail 13, and a C pillar 18 that extends downward from the right side rail 13 in the vicinity of which the rear rail 16 is connected. A belt guide 23 provided on the bracing member 17 for guiding a belt 22 of a seat belt device (rear seat belt) 21 for restraining an occupant of the rear seat 27; The retractor 24 is provided behind the seat 16 and accommodates the belt 22 of the seat belt device 21 so that the belt 22 can be wound or pulled out, and the roof panels 25 provided on the left and right side rails 13 and 13, the rear rail 16 and the bracing member 17. (See FIG. 4) and a roof railing (not shown) provided below the rear rail 16, the bracing member 17, the retractor 24, and the belt guide 23.

The roof lining covers the belt guide 23 by looking through the guide hole 95 of the belt guide 23.
The seat belt device 21 is a rear seat belt provided at the center of the rear seat 27 that restrains an occupant seated in the center of the rear seat 27, and the rear seat 27 is a seat on which three passengers can be seated.

4 is a cross-sectional view taken along line 4-4 of FIG. 2, FIG. 5 is a cross-sectional view taken along line 5-5 of FIG. 2, and FIG.
FIG. 7 is a perspective view of the seat belt device employed in the vehicle body superstructure shown in FIG.

  As shown in FIG. 4, the roof panel 25 has a panel hanging portion 32 extending downward from the rear of the panel main body 31 in the longitudinal direction of the vehicle body, and an oblique lower lower portion extending from the panel hanging portion 32. A panel extension 33 and a panel rear flange 34 that extends obliquely upward from the panel extension 33 are formed.

  Further, as shown in FIG. 6, the roof panel 25 has a groove 35 formed on the side of the panel main body 31 in the vehicle width direction, and the side panel 36 that covers the side rail 13 continuously from the groove 35. A panel side flange 37 formed and joined to the side rail 13 is formed on the side of the side panel portion 36.

The rear rail 16 includes an upper member 41 having a substantially L shape in cross section, and a lower member 42 having a concave shape in cross section that is joined to the front side of the upper member 41 from the lower side of the vehicle body.
The upper member 41 includes a front upper flange portion 44 provided at the front of the vehicle body, an upper flat portion 45 extending from the front upper flange portion 44 to the rear of the vehicle body and along the roof panel 25, and the upper flat portion 45. A hanging part 46 hanging from the rear part, a rear flat part 47 extending from the hanging part 46 to the rear of the vehicle body, and a rear upper flange 48 extending obliquely upward from the rear flat part 47 are formed. The

  The lower member 42 includes a front lower flange portion 51 provided at the front of the vehicle body, a front wall 52 extending from the front lower flange portion 51 to the rear of the vehicle body and obliquely downward, and rearward and substantially horizontally from the front wall 52. An extended lower wall 53, a rising portion 54 raised upward from the rear end of the lower wall 53, and a rear lower flange 55 extended rearward from the rising portion 54 are formed.

  That is, the rear rail 16 is a box-shaped closed cross section that extends in the vehicle width direction by the front portion 45a of the upper flat portion 45 of the upper member 41, the front wall 52, the lower surface wall 53, and the rising portion 54 of the lower member 42. (Closed cross-section rail) 57 is formed, and the recessed portion opened to the lower side of the vehicle body extending in the vehicle width direction is formed by the rising portion 54 of the lower member 42 and the rear portion 45b and the hanging portion 46 of the upper flat portion 45 of the upper member 41. A rail 58 is configured.

  In the upper structure of the vehicle body, the rear portion 31 a of the panel body 31, the panel hanging portion 32, the panel extension portion 33 and the panel rear flange portion 34, and the hanging portion 46, the rear flat portion 47 and the rear upper flange 48 of the upper member 41 are included. An opening rail 59 for a rear gate (not shown) is formed. Further, a mounting bracket 61 for attaching the retractor 24 of the seat belt device 21 is formed on the opening rail 59.

  As shown in FIG. 7, the retractor 24 is provided at the retractor body 63 around which the belt 22 is wound, the front stay 64 provided at the front part of the retractor body 63, and the rear part of the retractor body 63. As shown in FIG. 4, the rear stay 65 is housed in the concave rail 58 of the rear rail 16, the front stay 64 is fixed to the lower wall 53 of the lower member 42 with the mounting screw 66, and the rear stay 65 is opened. It is fixed to the mounting bracket 61 of the rail 59 with mounting screws 67.

As shown in FIG. 6, the side rail 13 includes an outer member 71 provided on the outer side in the vehicle width direction, and an inner member 72 provided on the inner side of the outer member 71.
The outer member 71 includes an outer main body 73 that protrudes outward and upward, an outer upper flange 74 provided above the outer main body 73, and an outer lower flange 75 provided below the outer main body 73.

  The inner member 72 is provided below the inner main body 76 that protrudes downward in the interior, the inner upper flange 77 that is provided above the inner main body 76 and is welded to the outer upper flange 74, and the inner main body 76. And an inner lower flange 78 welded to the outer lower flange 75.

  The outer upper flange 74 and the inner upper flange 77 constitute an upper flange 81, and the outer lower flange 75 and the inner lower flange 78 constitute a lower flange 82.

  As shown in FIG. 4, the bracing member 17 is a member having a closed cross-section 88 in a cross-sectional view closed loop shape in which a flat plate-like upper plate 84 and a lower plate 85 having a concave shape in a cross-sectional view of an upward opening are joined. As shown in FIG. 6, a side frame side joint 86 formed at one end and connected to the side rail 13 in the vicinity of the C pillar 18 is formed at the other end and connected to the rear rail 16 as shown in FIG. The rear rail side joint 87 is formed.

  As shown in FIG. 6, the side frame side joint 86 includes a side rail side flange 91 of the upper plate 84 and a side rail side flange 92 of the lower plate 85, and the side rail side flange 91 of the upper plate 84 is lower. The side rail side flanges 92 of the plate 85 are joined to each other, and the side rail side flanges 91 and 92 are sandwiched and joined by the groove portion 35 of the roof panel 25 and the upper flange 81 of the side rail 13.

  As shown in FIG. 5, the rear rail side joint 87 includes a rear rail side flange 93 of the upper plate 84 and a rear rail side flange 94 of the lower plate 85, and the rear rail side flange 93 of the upper plate 84 is the upper of the rear rail 16. Joined to the upper portion of the front upper flange portion 44 provided on the member 41, the rear rail side flange 94 of the lower plate 85 is joined to the front wall 52 provided on the lower member 42 of the rear rail 16.

  4 and 7, the belt guide 23 includes guide holes 95 through which the belt 22 of the seatbalt device passes and guides the belt 22, and left and right attachment portions 96 and 97 to which the bracing member 17 is attached. A roof lining (98) is attached to the roof lining (not shown). The belt guide 23 is attached to the lower plate 85 of the bracing member 17 with attachment screws 99 and 99.

8 is a cross-sectional view taken along line 8-8 in FIG.
As shown in FIGS. 2 and 8, in the vehicle body upper structure, left and right side rails 13 and 13 (one not shown) are provided in the vehicle body front-rear direction at the upper part of the vehicle body. The left and right rear pillars 15 and 15 (one not shown) extend downward, and the left and right side rails 13 and 13 are connected to the rear rail 16 in the vehicle width direction near the upper ends of these rear pillars 15 and 15 (one not shown). Is done.

  Since the bracing member 17 having the closed cross section 88 that obliquely connects the rear rail 16 and the side rail 13 is provided, the rear rail 16 that is the main skeleton of the body and the side rail 13 can be connected at the shortest distance. As a result, it is possible to reinforce the upper portion of the vehicle body while minimizing the increase in weight.

  Since the belt guide 23 of the seat belt device 21 that restrains the occupant of the rear seat 27 is disposed on the brace member 17, the load of the belt 22 can be sufficiently supported, and bending of the upper part of the vehicle body can be prevented. As a result, even when a three-point rear seat belt (seat belt device) 21 is adopted as the central seat of the rear seat 27, there is no restriction on the position of the rear seat 27, and a sufficient degree of design freedom is ensured. be able to.

  Since one end (side frame side joint) 86 of the bracing member 17 is connected to the side rail 13 in the vicinity of the C pillar 18 disposed immediately before the rear pillar 15, the load applied to the side rail 13 from the belt 22 is applied to the rear rail 16. And can be received by the C pillar 18 via the bracing member 17. That is, the load applied from the belt 22 to the side rail 13 can be distributed and received by the rear pillar 15 and the C pillar 18, and the side rail 13 can be prevented from being bent.

  The bracing member 17 has a closed cross section 88 in which a flat plate-like upper plate 84 and a lower plate 85 having a concave section in an upward opening are joined, and the rear rail 16 has a closed cross section (closed cross section rail) 57 in a box shape in cross section. Have.

  Since one end (side frame side joint portion) 86 of the bracing member 17 is joined to the upper flange 81 of the side rail 13 by overlapping the upper plate 84 and the lower plate 85, for example, the roof molding (not shown) of the side rail 13 is performed. ) Is not obstructed. Thereby, the freedom degree of a design can be improved without imposing restrictions on body design.

  At the other end of the bracing member 17, an upper plate 84 is joined to the upper portion of the rear rail 16, and a lower plate 85 is joined to the front wall 52 or the lower surface wall 53 of the rear rail 16. ) 57 is joined to the closed cross section 88 of the bracing member 17, the rear rail 16 and the bracing member 17 have an integral reinforcing member function, and a load is applied from the rear seat belt (seat belt device) 21 as indicated by an arrow A. Even when acting on the bracing member 17, the bracing member 17 can sufficiently support it. As a result, the rigidity of the upper part of the vehicle body can be improved.

  In the vehicle body superstructure, the retractor 24 of the seat belt device (rear seat belt) 21 is disposed behind the rear rail 16, so that the closed cross section 57 of the rear rail 16 can be enlarged. As a result, the load from the rear seat belt 21 can be sufficiently supported, and the vehicle body upper structure can be strengthened.

FIG. 9 is a sectional view of a vehicle body superstructure according to another embodiment of the present invention.
The vehicle body superstructure of another embodiment has left and right side rails 13 and 13 (one not shown) provided in the longitudinal direction of the vehicle body at the upper part of the vehicle body, and a rear rail 16 connected to the left and right side rails 13 and 13 in the vehicle width direction (FIG. 1). And a bracing member 17 that is obliquely connected to the rear rail 16 and the right side rail 13 at the front of the vehicle body to increase the rigidity of the rear rail 16 and the right side rail 13, and the left and right side rails 13, 13, A rear panel 16 and a roof panel 25 provided on the upper part of the bracing member 17, and a gusset 105 is provided between the inner member 72 of the side rail 13 and the lower plate 85 of the bracing member 17. The portion 86 is further reinforced. Thereby, the rigidity of the vehicle body upper structure can be further improved.

  5, the lower plate 85 of the bracing member 17 is joined to the front wall 52 of the rear rail 16 as shown in FIG. The lower plate 85 of the bracing member 17 may be joined to 53.

  The vehicle body superstructure according to the present invention is suitable for use in passenger cars such as sedans and wagons.

1 is a perspective view of a vehicle body upper structure according to the present invention. It is a top view of the vehicle body superstructure shown by FIG. FIG. 2 is a bottom view of the vehicle body superstructure shown in FIG. 1. FIG. 4 is a cross-sectional view taken along line 4-4 of FIG. FIG. 5 is a sectional view taken along line 5-5 of FIG. FIG. 6 is a sectional view taken along line 6-6 of FIG. It is a perspective view of the seatbelt apparatus employ | adopted as the vehicle body superstructure shown by FIG. FIG. 8 is a cross-sectional view taken along line 8-8 in FIG. 2. It is sectional drawing of the vehicle body superstructure of another Example which concerns on this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 13 ... Side rail, 15 ... Rear pillar (D pillar), 16 ... Rear rail, 17 ... Bracing member, 21 ... Rear seat belt (seat belt device), 23 ... Belt guide, 57 ... Closed section (closed section rail), 81 ... Above Flange, 84 ... upper plate, 85 ... lower plate, 86 ... one end (side frame side joint), 87 ... other end (rear rail side joint), 88 ... closed cross section.

Claims (3)

The left and right side rails provided in the vehicle body longitudinal direction at the upper part of the vehicle body, the left and right rear pillars extending downward from the rear portions of these side rails, and the left and right side rails connected in the vehicle width direction in the vicinity of the upper ends of these rear pillars In the car body superstructure with the rear rail,
A bracing member having a closed cross section that obliquely connects the rear rail and the side rail is provided, and a belt guide for a rear seat belt that restrains an occupant of a rear seat is disposed on the bracing member ,
The bracing member has a closed cross section in which a flat plate-like upper plate and a lower plate having a concave shape in an upward opening are joined, and the rear rail has a box-like closed cross section,
One end of the bracing member is joined by overlapping the upper plate and the lower plate to the upper flange of the side rail,
The other end of the bracing member has the upper plate joined to the upper portion of the rear rail and the lower plate joined to the front wall or the lower wall of the rear rail, and the closed cross section of the bracing member is connected to the closed cross section of the rear rail. vehicle superstructure, characterized in Rukoto but is joined.   The vehicle body upper structure according to claim 1, wherein one end of the bracing member is connected to the side rail in the vicinity of a C pillar disposed immediately before the rear pillar.   The vehicle body superstructure according to claim 1, wherein a retractor of the rear seat belt is disposed behind the rear rail.

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