JPH01306342A - Installation structure for rear bumper of automobile - Google Patents

Abstract

PURPOSE:To contrive an improvement in working efficiency for the installation of a rear bumper by fixing a rear bumper support members at the plural numbers of mounting positions in the transversal direction wherein one mounting position is composed of two points. CONSTITUTION:One rear bumper support member 12 is fixed onto a rear panel 2 and a reinforcing piece 8 by letting bolts 16 and 17 arranged for stationary pieces 15 be threadedly engaged with nuts while being penetrated through the rear panel 2, and the openings 10 and 11 of the reinforcing pieces 8. The openings 10 and 11 of the reinforcing piece 8 are positioned above a rear floor 3, which situation thereby enables bolts and nuts to be fastened with each other only above the rear floor 3, thereby improving working efficiency and also facilitating an automation of assembly works. In addi0tion, a bumper stiffening member 20 made of hard resin is formed along the inside of a rear bumper 27 so as to be fixed onto a stationary piece 15 with bolts and nuts. This constitution thereby can make a structure concerned light in weight.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the structure of mounting a rear bumper along the rear end of a rear floor covered with a rear panel.

Figure 1 shows an example of a known rear bumper mounting structure. The figure shows the left rear end of the vehicle body with the rear panel removed, and most of the rear panel 01 is cut out.

The rear panel 01 is a bent edge 0 that is the rear end of the rear floor 03.
4, and the rear panel 01 and the rear floor 03 are assembled in an orthogonal attitude as a whole.

The rear floor 03 has a low central part 03A (tire storage area) in the vehicle width direction, and is high on the left and right sides.

A rear frame (or rear floor side frame) 05 with a U-shaped cross section runs along the lower surface of the rear floor 03 at a high position on the right. The rear end of the rear frame 05 is a bent tsuba 06
The collar 06 is in contact with an extension 02 of the rear panel 01 that hangs below the rear floor 03. Further, at a position near the rear end of the rear frame 05, a reinforcing piece 07 having a U-shaped cross section along the upper surface of the rear floor 03 is attached to the rear frame 05.
It is integrally fixed to the upper side flange of 5. Reinforcement piece 07
is a relatively short groove-shaped member whose groove becomes shallower from the rear end to the front end.
4 and the rear panel 01.

The support member that supports the rear bumper is the rear panel 0.
1 through the opening 06a, and the rear frame 0 at the 08 section.
5 Tsuba 06. It is screwed and fixed to the collar 08 of the reinforcing piece 07.

↓(21 gates like this) The structure of the mounting of the support part is that the opening is 0.
8a is located on the interior side of the car above the rear floor 03,
Since the opening 06a is located below the rear floor 03 and on the side of the outside space, the work efficiency of installing the rear humber is significantly reduced, making it difficult to automate the work.

SUMMARY OF THE INVENTION An object of the present invention is to improve work efficiency when assembling a rear bumper in automobile assembly, and to facilitate automatic rear bumper assembly.

The purpose of this is to attach the support member that supports the rear pampa to at least two points that are separated from each other in the vertical direction. The mounting of the rear handle is achieved by employing a structure in which the upper and F points are both located above the rear floor and on the side of the vehicle interior space.

An embodiment of the present invention shown in FIGS. 2 to 6 will be described below. FIG. 2 schematically shows the car body 1 in the second half. The rear panel 2 extends along a bent edge 4 that is the rear end of the rear floor 3, and the rear panel 2 and the rear floor 3 are assembled in an attitude that intersects at right angles as a whole. Also, in this example, the beam and panel 2 are connected to the rear floor 3.
It should be noted that the extension part 02 of the rear panel 01 in the known example shown in FIG. 1 is omitted.

The rear floor 3 has a low central part 3A (tire storage area) in the vehicle width direction, and is high on the left and right sides.

A rear frame 5 having a U-shaped cross section runs along the lower surface of the rear floor 3 at a high position on the right. A sealing plate 6 having bent edges 7 on the left, right and lower sides is fitted into the open rear end portion of the rear frame 5 and welded together.

The reinforcing piece 8 is a groove-shaped member (a member having a U-shaped cross section) whose groove becomes gradually shallower from the rear end to the front end, and is integrally connected and fixed to the upper edge flange of the rear end of the rear frame 5 via the rear floor 3. ing. A collar 9 bent at the rear end of the reinforcing piece 8 is in contact with the bent edge 4 of the rear floor 3 and the rear panel 2, and screw openings 10 are formed in the collar 9 at intervals in the vertical direction.
11 is formed, and openings 2a and 2b (FIG. 2) are formed in the rear panel 2 corresponding to the openings 10.11.

Each member constituting the rear bumper assembly (FIG. 5) is assembled to the vehicle body 1 having such a structure as shown in FIG. 6. The members constituting the rear bumper assembly are as follows.

■Bumper support member 12 - The bumper support member 12 is made of steel and consists of a long channel member 13 and a pair of fixing pieces 15 with high strength and rigidity that are integrally connected to the channel member 13. ing. The bumper support member 12 connects bolts 16 and 17 attached to the fixing piece 15 by welding to the rear panel 2.
．． By passing through the openings 2a, 2b, 10.11 of the reinforcing piece 8 and screwing together with the neck 1-18.19, the rear panel 2. is a vehicle body side member. It is fixed to the reinforcing piece 8.

■Hamba stiffening member 20--The Hamba stiffening member 20 is a U-shaped cross-sectional member with high strength and rigidity made of hard resin, and has openings 22 formed in two pairs of upper and lower R21, 23.
．． 24 is fixed to the pair of fixing pieces 15 with bolts and nuts 25.

(2) Buffer body 26 - The buffer body 26 is a rod-shaped body made of a foamed resin material, and is interposed between the bumper stiffening member 20 and the rear bumper 27.

■ Rear bumper 27 - The rear bumper 27 is made of hard resin and has a U-shaped cross section, and is fixed to each opening 14 of the channel member 13 with a plurality of bolts/nuts 28 at the upper side, and bolts at the lower side. - It is fixed to the lower ends of the pair of fixing pieces 15 with nuts 29.

The features of this embodiment are as follows.

■The openings tO, U of the reinforcing piece 8 and the openings 2a, 2b of the rear panel 2 for fixing the humber support member 12 are located above the rear floor 3, and the bolts 16.
Nut 18 and bolt 17. The tightening operation using the nut 19 can be performed only above the rear floor 3, improving the efficiency of the assembly work, and making it easy to automate the assembly work.

■Bumper support member 12. In order to reduce the burden on the reinforcing member 8 and the rear panel 2 against the load (moment) of the bumper stiffening member 20 and the buffer body 26, the openings 10, 11 (
It is preferable that the height difference between the openings 2a and 2b) be as large as possible, and in this embodiment, this height difference is ensured by installing the reinforcing piece 8 in the step-like depressed portion of the rear floor 30.

■In the structure shown in Fig. 1, the extension part 02 of the rear panel 01 extending below the rear floor 03 functions together with the reinforcing piece 07 as an open member for supporting the bumper, and also serves as a chipping protection member for the steel bumper stiffening member (Note). The phenomenon in which the steel pump bar stiffening members are damaged by the earth and sand thrown up by the wheels is called chimping. In this embodiment, the openings 10 and 11 are both located above the rear panel 2, and even if the extension part 02 is provided, it is not used as a rigid member for supporting the damper, so it is omitted.

Therefore, the rear panel 2 does not function as a chipping protection member, and accordingly, the bumper stiffening member 20 is formed of a resin material with good chipping resistance.

As a result, the area of the rear panel 2 is reduced, material savings and weight reduction are achieved, and weight reduction is also achieved by forming the bumper stiffening member 20 from a resin material.

■When a large impact load is applied to the rear bumper 27 from the rear side of the vehicle body, the impact load is absorbed by the buffer body 26 and transmitted to the vehicle body side via the bumper stiffening member 20° fixing piece 15. Ru. Since the fixing piece 15 is attached to the reinforcing piece 8, the load transmitted to the fixing piece 15 is transferred to the reinforcing piece 8 without affecting the rear panel 2.
and is transmitted to the carrier frame 5 which is integrated with this. The bumper stiffening member 20 has a shape in which the portion between the left and right fixed portions (flange 2L23 portion) protrudes toward the rear of the vehicle body, and the rigidity in the longitudinal direction of the vehicle body is large in this intermediate portion, and the stiffness acts on the intermediate portion. The applied load is effectively transmitted to the 23rd portion of the collar 2L.

As is clear from the above explanation, the structure of the rear bumper installation of the present invention is such that the support member supporting the rear bumper is installed at at least two points separated from each other in the vertical direction in the vehicle width direction. When installing the rear bumper, the rear bumper must be installed from the rear floor. This can also be done only in the upper space, resulting in better work efficiency than conventional structures and contributing to improved productivity. Additionally, the fact that rear bumper assembly work can only be done in the space above the rear floor means that it is easy to automate the assembly work, and if automation is performed, productivity will be even higher. improves.

[Brief explanation of the drawing]

FIG. 1 is a cutaway perspective view of the main part of the rear part of the left side vehicle body showing the structure of the rear bumper installation of a vehicle according to a known method, and FIG. FIG. 3 is a partially cutaway perspective view of essential parts thereof, FIG. 4 is a sectional view taken along the line IV-IV in FIG. 3, and FIG. FIG. 6 is an exploded perspective view of the structure of the rear bumper assembly, and FIG. 6 is a longitudinal sectional side view of the main part of the structure of the rear bumper installation according to the embodiment of the present invention. l-...Vehicle body, 2- Rear panel, 3- Rear floor,
4-bent edge, 5-rear frame, 6-sealing plate, 7-・
Bent edge, 8-reinforcement piece, 9-tsuba, 10.11-opening, 1
2...-bumper support member, 13-channel member, 14--opening, 15--fixing piece, 16.1'7-bolt, 18.1
9-nando, 20-bumper stiffening member, 21-crocodile, 22
-・-Opening, 23-Brim, 24-Opening, 25-Bolt/Nut, 26-Buffer, 27-Rear bumper, 28.
29- Bolt Nando.

Claims (2)

[Claims] (1) In a vehicle in which a rear bumper is provided along the rear edge of the rear floor covered by a rear panel, the support member that supports the rear bumper is installed at at least two points separated from each other in the vertical direction. A rear bumper mounting structure for an automobile, characterized in that the mounting structure is fastened to a member on the vehicle body side at a plurality of mounting points, and the two points, the upper and lower points, are both located above the rear floor and on the side of the vehicle interior space. (2) The rear bumper mounting structure for an automobile as set forth in claim 1, wherein the bumper stiffening member extending along the inside of the rear bumper is made of resin.