JPH0769243A - Car body front structure for automobile and assembling method thereof - Google Patents

Abstract

PURPOSE:To reduce the number of part items by integrally providing a bumper retainer, on which a bumper is installed, with a radiator core panel with resin, and installing the bumper on this integrally molded resin unit. CONSTITUTION:This resin unit 37 installed in the front part of a car main body 35 is formed by molding integrally a radiator core panel 45 on which exterior trim parts such as head lamps 39 and 41 or a radiator grill 43 are installed with a bumper retainer 49 on which a bumper 47 is installed with resin such as glass long-fiber reinforced polypropylene. In the radiator core panel 45, the installing part 59 of a hood lock 57 is formed in the center of a radiator core upper 51, and the grill installing parts 61 of the radiator grill 43 are formed on both sides of this installing part 59. The lock installing part 59 of the radiator core upper 51 and the central part of an upper retainer 71 of the bumper retainer 49 are connected to each other by a hood lock support 97.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle body front structure including a bumper retainer to which a bumper is attached.

[0002]

2. Description of the Related Art As a conventional vehicle body front structure, for example,
April 20, 1980 Published by Sankaido Co., Ltd. There is a thing as described in Vol. 13 of Automotive Engineering, "Car body of passenger car". FIG. 5 shows an example thereof. This is because a radiator core support 3 to which vehicle exterior parts such as headlamps are attached is welded and fixed to the front portion of the vehicle body 1, and a bumper retainer 7 to which a bumper 5 is attached is provided below the radiator core support 3. It is fixed to the vehicle body 1 with bolts.

The manner in which the bumper retainer 7 is attached to the vehicle body 1 will be described with reference to FIGS. 6, 7 and 8 which are enlarged exploded perspective views of the parts A, B and C in FIG. 5, respectively. To do. As shown in FIG. 6, the end portion of the bumper retainer 7 in the vehicle width direction is set on a fender bracket 11 that is welded and fixed to the front fender 9, and a nut 15 is fastened to a bolt 13 provided on the fender bracket 11. Be fixed by that.

As for the side portion of the bumper retainer 7 on the rear side of the vehicle body, as shown in FIG.
It is fixed to the vehicle body 1 via a retainer bracket 19 which is fixed to. The side surface of the retainer bracket 19 is fixed to the front side member 17 by the bolts 21, and the upper surface 19a of the retainer bracket 19 is fixed to the bumper retainer 7 by the bolts 23.
9b is fixed by the bolt 25.

At the center of the bumper retainer 7, as shown in FIG. 8, the upper end of the retainer center bracket 27 is welded and fixed to the bumper retainer 7, and the lower end of the retainer center bracket 27 is attached to the front cross member 29.
It is fixed to the vehicle body 1 by being fixed to the hood lock support 31 whose lower end is fixed by welding with the bolt 33. The upper end of the hood lock support 31 is fixed to a hood lock bracket (not shown) attached to the radiator core support 3.

The bumper 5 has an upper surface fixed to the bumper retainer 7 and a lower surface fixed to the front cross member 29.

[0007]

However, in such a conventional vehicle body front structure, in order to mount the bumper 5, the bumper retainer 7 and the retainer bracket 1 are attached.
9 or the retainer center bracket 27 is required, and there are many parts for mounting the bumper, which not only causes an increase in cost, but also has a problem that the assembling workability is extremely poor. Further, since the bumper retainer 7 is fixed to the vehicle body 1 at several places, it is difficult to obtain a vertical position (horizontality). Therefore, the upper surface of the bumper 5 attached to the bumper retainer 7 and the headlamp There is also a problem in that the gap between the radiator and the radiator grill is not stable, and the appearance quality is degraded.

Therefore, the present invention aims to reduce the number of parts required for mounting the bumper.

[0009]

In order to achieve the above-mentioned object, the present invention is, firstly, a radiator core panel to which vehicle exterior parts such as headlamps and hood locks are attached, and a bumper retainer to which a bumper is attached. And are integrated with resin to form a resin unit.

Secondly, the bumper is directly attached to the bumper retainer with respect to a resin unit in which a radiator core panel to which vehicle exterior parts such as headlamps and hood locks are attached and a bumper retainer to which the bumper is attached are integrated with resin. There is a way to install.

Thirdly, in the first configuration and the second method, the resin unit has a radiator core upper portion provided with a lock attachment portion extended in the vehicle width direction at the upper portion and attached with a hood lock, and a resin core portion at the lower portion. A bumper retainer that is extended in the width direction and to which a bumper is attached is provided, and the lock attachment portion and the bumper retainer at a lower portion thereof are
When the bumper retainer receives an impact force in the vehicle front-rear direction, the bumper retainer is connected by a connecting member that absorbs the impact force.

Fourth, in the third configuration, the connecting member has at least an upper end attached to the lock attachment portion of the radiator core upper together with the hood lock, and a lower end of at least the attachment flange contacting the bumper retainer or the upper surface of the bumper retainer. It is configured to be attached by a fastener using a long hole provided on one side and extending in the vehicle front-rear direction.

Fifthly, in the third structure, the connecting member has a shock absorbing portion integrally formed with a hood lock support portion connecting the radiator core upper and the bumper retainer.

[0014]

According to the first configuration and the second method, since the bumper retainer to which the bumper is attached is integrated with the radiator core by resin, the bumper may be attached directly to the integrated resin unit. As a result, fewer parts are needed to install the bumper. Further, since the bumper is directly attached to the bumper retainer, which is made of resin and integrated with the radiator core to which the exterior parts such as the headlamp are attached, the gap with the exterior parts such as the headlamp is stabilized.

According to the third, fourth or fifth construction, when the bumper receives a shock in the vehicle front-rear direction, the connecting member for connecting the bumper retainer and the radiator core upper absorbs the shock, The connecting member ensures shock absorbing performance while maintaining the hood lock support function as desired.

[0016]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is an exploded perspective view of a vehicle body front structure showing an embodiment of the present invention. A resin unit 37 is attached to the front part of the vehicle body 35. The resin unit 37 includes the headlamps 39, 41 and the radiator grill 4
A radiator core panel 45 to which vehicle exterior parts such as 3 are attached and a bumper retainer 49 to which a bumper 47 is attached are integrally formed of a resin such as long glass fiber reinforced polypropylene.

The radiator core panel 45 has a radiator core upper 51 extending in the vehicle width direction, and a lamp mounting portion 53 to which headlamps 39 and 41 are mounted on the lower portions of both ends of the radiator core upper 51 in the vehicle width direction. 55
Are formed. At the center of the radiator core upper 51, a lock attachment part 59 to which a hood lock 57 is attached is attached.
And a grill mounting portion 61 of the radiator grill 43 mounted so as to cover the hood lock 57 is formed on both sides of the lock mounting portion 59 in the vehicle width direction. At both ends of the radiator core panel 45 in the vehicle width direction, the vehicle body 35
A mounting portion 63 that bends toward the side is formed, and this mounting portion 63 is fixed to a mounting portion 65a at the front end of the hood lid panel 65 of the vehicle body 35 with bolts 67. The outside of the hood lid panel 65 is the front fender panel 69.
Is covered with.

The bumper retainer 49 includes an upper retainer 71 extending substantially in the vehicle width direction under the radiator core upper 51 and having substantially the same length as the radiator core upper 51, and a shorter vehicle width direction below the upper retainer 71 than the upper retainer 71. And a lower retainer 73 that is extended to. The upper retainer 71 has upper portions at both ends in the vehicle width direction integrated with the lamp mounting portions 53 and 55.
The lower retainer 73 and the lower retainer 73 are connected to each other on both sides in the vehicle width direction.
77 and a central connecting portion 79 are integrated with each other.

The central connecting portion 79 has the same front surface as the upper retainer 71, but the connecting portions 75, 7 on both sides are formed.
7 is retracted rearward with respect to the front surface of the upper retainer 71, and the connecting portions 75 and 77 are fixed to the mounting portion 81a of the first cross member 81 on the vehicle body 35 side with bolts 83. The lower retainer 73 also has bolts 8
It is fixed to the first cross member 81 by 5, 87. Both ends of the first cross member 81 in the vehicle width direction are welded and fixed to the front end side portions of the front side members 89, 91.

The upper retainer 71 has an upper mounting surface 71a which projects forward as a whole, and the lower retainer 73 has a lower mounting surface 73a whose lower end projects forward. Bumper 4
7 is an upper mounting surface 7 of the upper retainer 71.
1a, the inner surface of the lower part is set so as to cover the lower surface of the lower mounting surface 73a of the lower retainer 73, and in this state, the upper part and the lower part are fixed by bolts 93 and 95, respectively.

The lock attachment portion 59 of the radiator core upper 51 and the central portion of the upper retainer 71 in the vehicle width direction are shown in FIG. 2 which is an enlarged AA sectional view of FIG. 1 and the enlarged portion thereof. As shown in FIG. 3 which is an exploded perspective view, they are connected by a hood lock support 97 as a connecting member. The hood lock support 97 has its upper end fastened together by a central bolt 99 of the three bolts 99, 101, 103 for attaching the hood lock 57 to the lock attachment portion 59, and is fixed.

On the other hand, the lower portion of the hood lock support 97 is bent rearward of the vehicle to form a mounting flange 97a.
The mounting flange 97a is formed with an elongated hole-shaped mounting hole 97b whose front end is open and which extends in the vehicle front-rear direction. The mounting flange 97a is set on the convex mounting portion 105 formed on the upper mounting surface 71a of the upper retainer 71, the bolt 107 is inserted into the mounting hole 97b, and the bolt hole 105a in the mounting portion 105 is used to form the upper portion. It is fixed to the retainer 71.

According to such a vehicle body front structure, the bumper retainer 49 to which the bumper 47 is attached is
The radiator core panel 45 and the bumper 47 are integrally molded with resin, and the bumper 47 may be directly attached to the integrated resin unit 37. When the bumper 47 is mounted, parts such as the retainer bracket used in the past are unnecessary. The number of parts required for the assembly is small, which not only achieves cost reduction and weight reduction, but also improves assembly workability by shortening the assembly time. In addition, the headlamp 39,
Mounting part 5 to which 41 and radiator grill 43 are mounted
Since 3, 55 and 61 and the upper retainer 71 to which the upper part of the bumper 47 is attached are integrally formed, the dimensional accuracy between them is improved, and the gaps between the attached components are stabilized. The appearance quality is improved.

When the vehicle collides and the bumper 47 receives an impact in the vehicle front-rear direction and is deformed as shown by the chain double-dashed line in FIG. 2, this impact force is transmitted to the bumper retainer 49. On the other hand, the bumper retainer 49 is connected to the radiator core panel 45 by the hood lock support 97.
Mounting hole 97b that is open to the rear side of the vehicle
Since the bumper retainer 49 that receives the impact force receives the fastening force by the bolt 107, the bumper retainer 49 is on the rear side of the vehicle body with respect to the mounting flange 97a of the hood lock support 97 (direction of arrow B in FIG. 2). It moves while sliding to, so that the impact force is absorbed, the impact absorbing performance at the time of collision is secured, and the transmission of the impact force to the hood lock 57 is blocked.

The impact that the hood lock support 97 receives when closing the hood can be sufficiently counteracted because the lock attachment portion 59 is connected to the bumper retainer 49 by the hood lock support 97, similar to the conventional hood lock support. The function of is secured.

In the above embodiment, the hood lock support 97 has a long hole, but instead of this, a long hole is formed on the bumper retainer 49 side and a bolt hole is formed on the hood lock support 97 side. You may do it.

FIG. 4 shows another embodiment of the present invention. In this embodiment, the hood lock support portion 109 is formed by integrally molding a connecting member that connects the central lock attachment portion 59 of the radiator core panel 45 and the bumper retainer 49 with the radiator core panel 45 and the bumper retainer 49. It is a thing. Here, the lock mounting portion 5
The hood lock support portion 109 including 9 is made thin, and a notch 109a extending in the vehicle width direction is provided on the front surface of the hood lock support portion 109 having a rectangular cross section, thereby partially reducing the rigidity in the vehicle front-rear direction and absorbing the impact. Forming a part.

Since the hood lock support portion 109 is made thin as a whole, horizontal ribs 109b and 109c are formed above and below the notch 109a on the back side, and vertical ribs 109d which connect the upper horizontal ribs 109b and the radiator core upper 51. This reliably supports the load applied to the hood lock 57.

Even in such a structure, when the bumper 47 receives an impact in the vehicle front-rear direction and the bumper retainer 49 also receives an impact force in the same direction, this impact force is generated by the notch 109a of the thin hood lock support 109. Absorbed,
Similar to the above embodiment, the shock absorbing performance at the time of collision is secured and the transmission of the impact force to the hood lock 57 is blocked. On the other hand, when closing the hood, the lock mounting portion 5
9 is a bumper retainer 49 and a hood lock support section 10
Since they are integrated and connected by 9, the same function as the conventional hood lock support is secured.

[0031]

As described above, according to the first or second aspect of the present invention, the bumper retainer to which the bumper is attached is integrated with the radiator core panel by the resin. It suffices to directly attach the unit to the unit. Therefore, components such as the retainer bracket which have been conventionally used are not required, the number of components can be reduced, and the cost and the assembly time can be shortened. In addition, the bumper is directly attached to the bumper retainer, which is integrated with the radiator core panel to which exterior parts such as headlamps are attached by resin, so the gap between the exterior parts such as headlamps is stable and the appearance quality is improved. be able to.

According to the third, fourth or fifth aspect of the present invention, when the bumper receives a shock in the front-rear direction, the connecting member that connects the bumper retainer to which the bumper is attached and the radiator core upper receives this shock. The shock absorbing performance can be secured while absorbing and maintaining the hood lock support function by the connecting member.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a vehicle body front structure showing an embodiment of the present invention.

FIG. 2 is an enlarged AA sectional view of FIG.

FIG. 3 is an enlarged exploded perspective view around the hood lock of FIG.

FIG. 4 is a perspective view of a hood lock mounting portion showing another embodiment of the present invention.

FIG. 5 is an exploded perspective view of a vehicle body front structure showing a conventional example.

FIG. 6 is an exploded perspective view showing how the bumper retainer shown in FIG. 5 is attached to the vehicle body at the vehicle width direction end.

FIG. 7 is an exploded perspective view showing a state in which a side portion of the bumper retainer in FIG. 5 in the vehicle front-rear direction is attached to the vehicle body.

FIG. 8 is a perspective view showing a state where the central portion of the bumper retainer in FIG. 5 is attached to the vehicle body.

[Explanation of symbols]

 39, 41 Headlamp 45 Radiator core panel 47 Bumper 49 Bumper retainer 37 Resin unit 35 Vehicle body 57 Hood lock 59 Lock attachment part 97 Hood lock support (connecting member) 97b Attachment hole (long hole) 107 Bolt (fastener) 109 Hood Lock support part (connecting member)

Claims (5)

[Claims] 1. A vehicle body, characterized in that a radiator core panel to which vehicle exterior parts such as a headlamp and a hood lock are attached and a bumper retainer to which a bumper is attached are integrated with resin to form a resin unit. Front structure. 2. A bumper retainer is directly attached to a resin unit in which a radiator core panel to which vehicle exterior parts such as a headlamp and a hood lock are attached and a bumper retainer to which a bumper is attached are integrated with resin. A method for assembling a front part of a vehicle body, characterized by: 3. The resin unit includes a radiator core upper having an upper portion extending in the vehicle width direction to which a hood lock is attached and a radiator core upper, and a lower portion extending in the vehicle width direction to which a bumper is attached. The lock attachment portion and the bumper retainer in the lower portion thereof are connected by a connecting member that absorbs the impact force when the bumper retainer receives the impact force in the vehicle front-rear direction. Item 3. A vehicle body front structure according to Item 1 or 2, or an assembling method thereof. 4. The vehicle front-rear direction in which the connecting member has an upper end attached to the lock attachment portion of the radiator core upper together with the hood lock, and a lower end attached to at least one of the bumper retainer and an attachment flange contacting the upper surface of the bumper retainer. The vehicle body front structure according to claim 3, or the assembling method thereof, characterized in that the vehicle body front structure or the assembling method thereof is attached by using a long hole which is extended to the. 5. The vehicle body front structure or the vehicle front structure according to claim 3, wherein the connecting member has a shock absorbing portion integrally formed with a hood lock support portion connecting the radiator core upper and the bumper retainer. Assembly method.