JPH04143140A - Bumper structure for vehicle - Google Patents

Abstract

PURPOSE:To absorb shock for each lamp device, and thereby reduce possible damage to each lamp device by enhancing the initial stiffness of a bumper at the time of collision with reinforcements integrally formed into a hollow shape high in stiffness, and concurrently protecting each lamp device by each opening periphery formed in the reinforcements. CONSTITUTION:A front bumper 7 is integrally formed with reinforcements 2 so as to be bonded together at the inner section of each bumper section 4 roughly in a recessed section in cross section via each foam member 3, and a part of each bumper face 4 is opened inward at each side end of it, so that each lamp hole 5 is thereby provided wherein each lamp device 6 is housed. Each reinforcement 2 is made of urethane resin by means of injection molding while being formed integrally into a hollow shape high in stiffness where its cross section at the center is a closed one roughly in a rectangular shape. Opening sections 8 are formed at each end side of the bumper while being adjusted to each lamp hole 5 of the bumper face 4 in such a way that closed cross sections 11 and 12 are formed at the upper and lower sections, and flange shaped opening peripheries 9 are formed in the inner circumference of the opening. And a frame backing section 2a high in stiffness is provided for both of the end sections of the bumper while being largely projected afterward, so that stiffness combined with a frame 25 is thereby secured.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a bumper structure for a vehicle, and more specifically, a part of a bumper face attached to a vehicle body via a reinforcement fixedly supported in the vehicle width direction. The present invention relates to a vehicle bumper structure in which a lamp device is mounted in a lamp hole formed by opening a hole in a portion of the vehicle.

(Prior Art) In many cases, a bumper installed in the front or rear of a vehicle such as an automobile in the vehicle width direction is fixedly supported on the vehicle body frame via reinforcements arranged approximately parallel to the back surface of the bumper. In such a bumper structure, for example, as described in Japanese Utility Model Application Publication No. 61-82861, lamp holes are formed in a part of the bumper mainly from a design point of view, and the front A lamp installation structure has been proposed in which lamp devices such as turn signal lamps and backup lamps are housed inside the bumper.

[Problem to be solved by the invention]

Incidentally, recently, mainly due to the demand for weight reduction, bumper faces and reinforcements are often formed of resin materials. As a result, even in the event of a light collision, the bumper recedes significantly, and the internal lamp device tends to be easily damaged by secondary collision with body panels and various equipment placed behind it. There is.

The present invention has been made in consideration of such circumstances, and an object of the present invention is to provide a vehicle bumper structure that appropriately suppresses the rearward movement of the bumper during a collision and reduces damage to the lamp device.

[Means to solve the problem]

As shown in FIG. 1, for example, a bumper face 4 is attached to a vehicle body 1 through a reinforcement 2 that is fixedly supported in the vehicle width direction, and a lamp hole is formed by opening a part of the bumper face 4. In order to solve the above-mentioned problems, the reinforcement 2 is formed into a hollow rod shape from a resin material, and the lamp device in the reinforcement 2 is provided with a bumper structure for a vehicle in which a lamp device 6 is attached to the reinforcement 2. At a rear position of the lamp device 6, an opening 8 smaller than the outer shape of the lamp device 6 is formed to pass through the lamp device 6 in the front-rear direction, and the opening edge 9 is formed in a flange shape.

Such reinforcement 2 may be formed into a hollow rod shape by injection molding of a resin material.

[For production]

The reinforcement 2, which is formed into a hollow rod shape, has improved bending rigidity, so the bumper 7 is
The initial stiffness has been improved. On the other hand, the flange-like opening edge 9 formed in the reinforcement 2 can receive the lamp device 6 that retreats in the event of a collision. Therefore, in the event of a collision, etc., the retreat of the reinforcement 2 itself is alleviated, and the retreat of the lamp device 6 is suppressed, and by receiving the lamp device 6 with the flange-shaped opening edge 9,
Body panels and various equipment 2 directly adjacent to the lamp device 6
4 (see FIG. 4), etc., and damage is effectively prevented. In particular, in the event of a light collision, the lamp device 6
Even if there is a retreat of the chisel, the receiver is stopped by the opening edge 9 of the reinforcement 2 as described above, so damage can be avoided as much as possible.

〔Effect of the invention〕

The vehicle bumper structure of the present invention improves the initial rigidity of the bumper in the event of a collision by forming the reinforcement of the bumper into a hollow rod shape using a resin material.
The reinforcement is provided with an opening smaller than the external shape of the lamp device, and the lamp device can be received by a flange-like opening edge formed in the opening. Therefore, in the event of a collision, the backward movement of the bumper is moderately suppressed, and the lamp device is stopped by the flange-shaped opening edge to prevent it from colliding with nearby body panels, thereby reducing damage. . It is particularly effective in protecting lamp devices in light collisions. Note that such hollow reinforcement 2 can be easily integrally molded by injection molding.

〔Example] The present invention will be explained in detail below based on examples.

The vehicle bumper structure shown in this example is applied to a front bumper 7 provided in the front part of the vehicle body 1 in the vehicle width direction, as shown in FIG. It is configured as follows to reduce the amount of noise.

As shown in FIG. 1, the front bumper 7 is constructed by adhering and integrating a reinforcement 2 on the inside of a bumper face 4 with a substantially concave cross section via a foam material 3 that absorbs impact. Parts of both sides (see FIG. 5) are opened inward as shown to provide a lamp hole 5, and a lamp device 6 is housed inside the lamp hole 5. This lamp device 6 is a turn lamp, and its housing 10 is formed of polycarbonate resin in the shape of a horizontally long case.A bulb 15 is housed inside the housing 10, and a wide joining flange for joining a lens 16 is attached to the front surface of the housing 10. Part 10
a is formed. Then, its both sides are fixed to the bumper face 4 by fastening bolts and nuts (not shown), and the rear part thereof is fixed in the vehicle width direction by fastening bolts etc. to the front end of the frame 25 arranged in the longitudinal direction of the vehicle body 1. The opening 8 formed at the end of the reinforcement 2 is penetrated therethrough.

The reinforcement 2 is formed into a hollow rod shape with high rigidity by injection molding of urethane resin, and its center section has a substantially rectangular closed section shape, and a bumper face is provided at both ends (see Figures 2 and 3). The opening 8 is formed in a concave shape with open ends so as to form closed cross sections 11 and 12 above and below, corresponding to the lamp hole 5 of No. 4, and an opening edge 9 on a flange is formed on the inner periphery thereof.

Then, a highly rigid frame holder part 2a is provided by having both ends protrude slightly rearward to enlarge the closed cross section (see Fig. 4) to ensure joint rigidity with the frame 25, and the opening 8 thereof. The surrounding areas are being strengthened. Thereby, the opening 8 and the opening edge 9, which have high support rigidity, can be made to correspond to the turn lamp 6 which is arranged slightly obliquely toward the edge of the reinforcement 2.

When the turn lamp 6 is attached, the housing 10 is attached to the reinforcement 2 as described above.
It penetrates through the opening 8 and protrudes rearward (see Figure 1).
However, the opening 8 is formed smaller than the outer shape of the wide joint flange portion 10a, and the opening edge 9 formed on the inner periphery corresponds to the joint flange portion lOa. Although a portion of the turn lamp 6 protrudes laterally outward from the opening 8 (see Figure 2), the opening edge 9 can sufficiently stop the joining flange 10a in the event of a collision. To an extent,
Most of the joining flange portion 10a corresponds to the opening edge 9.

With the above-described configuration, firstly, since the reinforcement 2 is formed into a hollow rod shape with high rigidity, it is possible to improve the initial rigidity of the front bumper 7 in the event of a collision, and thereby moderate the retreat of the front bumper 7 itself. It can be suppressed. The foam material 3 can buffer the impact acting on the turn lamp 6, and the joint flange portion 10a of the turn lamp 6 that retreats
can be received by the opening edge 9 formed in the opening 8 of the reinforcement 2. Since the opening edge 9 is made of urethane material and is softer than the housing 10 made of polycarbonate resin, the turn lamp 6 is prevented from being damaged by the opening edge 9. In this way, in a state where the turn lamp 6 is stopped by the opening edge 9, even if the reinforcement 2 moves backward, the back surface of the reinforcement 2 will not touch the nearby body panel 23 (the sixth
(see figure) and accessories 24, such as the airbag sensor (fourth
(see figure), etc., and the turn lamp 6 is prevented from directly colliding with them and being damaged.

In particular, in this example, as mentioned above, the end of the reinforcement 2 is made to protrude slightly rearward to strengthen the area around the opening 8, so that it can be easily protected against a collision from an oblique direction. In the event of a collision, the turn lamp 6 can be sufficiently protected without colliding with the airbag sensor 24 and the like attached to the frame 25 in the vicinity thereof. Such a protection function also eliminates the inconvenience of inadvertently inflating the airbag, especially in the event of a minor collision.

6 and 7 show different embodiments, the lamp hole 5
is formed a little closer to the inside than the end of the bumper face 14, and the rear part of the turn lamp 26 is made to correspond to the opening 18 of the reinforcement 22, which is formed smaller than the outer shape of the rear part. In this case, the opening 18 is formed in a rectangular shape, and the opening edge 19 formed on the inner periphery of the opening 18 is designed to catch the rear part of the housing 20 of the turn lamp 26 that retreats in the event of a collision.

Even in this case, the turn lamp 26 can be protected from colliding with the vehicle body frame 25 or body panel disposed behind it, as in the previous embodiment.

As described above, according to the vehicle bumper structure of the present invention, the reinforcement is formed into a hollow rod shape with high rigidity, thereby improving the initial rigidity of the bumper at the time of a collision. Since the lamp device is received at the edge of the opening, it is possible to suppress the lamp device from retreating and to receive the lamp device with a buffer, thereby reducing damage. In the embodiment, an example in which the present invention is applied to a front bumper has been described, but it goes without saying that the present invention can also be applied to a bumper in which a lamp device such as a backup lamp is housed in a lamp hole.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a main part of the front bumper of the vehicle bumper structure of the present invention, and is a sectional view taken along the line I--I in FIG. 5. FIG. Figure 3 is a perspective view of the end of the reinforcement;
Fig. 4 is a plan view of four parts of the reinforcement with the lamp device attached, Fig. 5 is a perspective view of the vehicle body, and Fig. 6 is a cross section of the main part of the front bumper in a different embodiment.
FIG. 7 is a sectional view taken along the line Vl--Vl, and FIG. 7 is a perspective view of the vehicle body. 1- Vehicle body, 2.22- Reinforcement,
4.14-m-bumper face, 5-lamp hole, 6°26°-lamp device (turn lamp), 7-bumper (
front bumper), 8. 18-opening, 9°19-
・-En Sekiguchi. Patent Applicant Mazda Co., Ltd. Agent Patent Attorney Katsutoshi Yoshiso (1 person)

Claims (2)

[Claims] (1) A vehicle bumper structure in which a bumper face is attached to the vehicle body via a reinforcement that is fixedly supported in the vehicle width direction, and a lamp device is attached to a lamp hole formed by drilling a part of the bumper face. In the above, the reinforcement is formed into a hollow integral shape from a resin material, and an opening smaller than the outer diameter of the lamp device is formed in the reinforcement at a rear position of the lamp device to penetrate in the front-rear direction. A vehicle bumper structure characterized in that an opening edge thereof is formed into a flange shape. (2) The vehicle bumper structure according to claim 1, wherein the hollow integral reinforcement is formed by injection molding of a resin material.