JPH061492Y2 - Structure of resin bumper - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to the structure of a resin bumper for an automobile.

[Prior Art] The shape of a resin bumper changes due to a decrease in rigidity due to ambient heat such as direct sunlight in midsummer. In particular, in a thin resin bumper having a U-shaped cross section, in which a pair of upper and lower horizontal ribs provided on the inner surface and extending in the longitudinal direction are supported on the vehicle body side, the upper plate portion is not supported on the vehicle body side. So it tends to sag at high temperatures.

Therefore, FIG. 6 (for example, see Japanese Utility Model Laid-Open No. 61-10259).
As shown in FIG. 2, there has been proposed one in which a plurality of vertical ribs 21 are integrally provided between the horizontal rib 3 of the resin bumper 2 and the upper plate portion 4. However, if the mutual spacing of the ribs 21 is wide, the upper plate portion 4 tends to hang down between the ribs 21, and if the mutual spacing of the ribs 21 is narrowed, the amount of resin material used increases and the weight increases, This is not preferable because the elastic deformation capability of the resin bumper during a light collision can be suppressed.

As disclosed in Japanese Patent Application Laid-Open No. 58-224834, when the upper plate part of the resin bumper is supported by a metal beam, it is possible to suppress sagging of the upper plate part due to thermal softening, but it is light. When the beam is deformed due to the collision, the restoration of the resin bumper supported by the beam is restricted and the appearance is impaired.

[Problems to be Solved by the Invention] In view of the above problems, an object of the present invention is to maximize the elastic ability of a resin material, and the restoring force is not restrained against a light collision, and the appearance is impaired. It is to provide a structure of a resin bumper that does not exist.

[Means for Solving the Problem] In order to achieve the above object, the structure of the present invention has a pair of upper and lower horizontal ribs extending in the longitudinal direction provided on the inner surface of a resin bumper, and has a U-shaped cross section. A pair of metal stays are sandwiched, and the lower flanges of the metal support plates having a U-shaped cross section are superposed on the stays and joined together to form a resin bumper, each stayer, and one support plate. Each is supported on the vehicle body by vertical bolts, and on the upper flange of the support plate,
A sliding guide plate having the same size as the longitudinal dimension of the resin bumper is coupled, and an upper plate portion of the resin bumper is superposed on the sliding guide plate so as to be slidable.

[Operation] The distance between the pair of upper and lower horizontal ribs is 1 between the horizontal ribs.
It is maintained by a pair of U-shaped stayers. Since the lower flange of the support plate having a U-shaped cross section is fixed to each stayener, the support plate is fixed to the vehicle body side via the stayener. The upper flange of each support plate supports a sliding guide plate having substantially the same length as the resin bumper. Since the upper surface of the resin bumper is slidably supported on the upper surface of the sliding guide plate, it is possible to prevent the upper plate from sagging due to thermal softening.

When the resin bumper is pushed in the front-rear direction of the vehicle body due to a light collision, the upper plate portion relatively slides in the front-rear direction along the slide guide plate, and is not subjected to the restraining force of the slide guide plate. Therefore, even if the sliding guide plate is deformed, the resin bumper is restored to its original shape without impairing the appearance.

[Embodiment of the Invention] The resin bumper 2 according to the present invention is relatively thin and soft as a whole as shown in FIG. 4, and as shown in FIG. A pair of horizontal ribs 3 are integrally formed, and a pair of left and right metal staplers 6 having a U-shaped cross section are engaged between the pair of upper and lower horizontal ribs 3.
Further, the right and left two places are connected by bolts 7, respectively.
Each stapler 6 is connected to a back bar 13 connected to an end of a vehicle frame or a side member 12 by a vertical bolt 14.

As shown in FIG. 3, the stay funner 6 has a U-shaped cross section, but a pair of upper and lower flanges 6 a in the central portion of the stay funner 6 are provided.
Is narrower than the distance between the pair of upper and lower flanges 6b on both ends. A back bar 13 having a U-shaped cross section is sandwiched between a pair of flanges 6a, and the vertical bolt 1
Combined by four. Therefore, the resin bumper 2 is 2
It is supported by a pair of left and right back levers 13 by a book (actually, two sets of bolts arranged vertically).

The present invention is configured to suppress the sagging of the upper plate portion 4 due to thermal softening in the resin bumper described above. First
As shown in the figure, the resin bumper 2 is integrally formed with a pair of upper and lower horizontal ribs 3 extending in the longitudinal direction on the inner surface thereof, and a stapler 6 having a U-shaped cross section is sandwiched between the pair of upper and lower horizontal ribs 3. The pair of upper and lower flanges 6b of the stay funnel 6 shown in FIG. 3 are superposed on the horizontal rib 3, a metal protective plate 9 is superposed on the opposite side of the flange 6b, and they are connected by bolts 7 and nuts. The resin bumper 2 has an upper plate portion 4 at the upper edge,
A lower plate portion 5 that is inclined obliquely downward is integrally formed at the lower edge portion.

In order to prevent the upper plate portion 4 from hanging down, a metal sliding guide plate 10 having substantially the same length as the resin bumper 2 is supported on the upper horizontal rib 3 by a pair of left and right U-shaped support plates 8. To be done.

As shown in FIG. 2, the slide guide plate 10 has a substantially U-shaped cross section. The upper bracket 8b of the support plate 8 is joined to the sliding guide plate 10 by welding or the like, and the lower flange 8a is superposed on the flange 6b of the stayer 6 and joined by the bolt 7. The sliding guide plate 10 has an upper plate portion 4
Is tilted substantially parallel to and is slidably engaged with the lower surface of the upper plate portion 4.

In the above-described configuration, the slide guide plate 10 coupled to the upper horizontal rib 3 by the support plate 8 slidably supports the upper plate portion 4 of the resin bumper 2, so that the resin bumper 2 is used during summer.
Even if is softened, the upper plate portion 4 is supported by the metal slide guide plate 10 and is not deformed such as hanging down.

Even if the upper plate portion 4 is pushed backward by the collision load, the upper plate portion 4 only slides along the slide guide plate 10, and the elastic deformation of the resin bumper 2 is prevented by the slide guide plate 10. There is no such thing. Sliding guide plate 1 due to fairly large collision load
Even if 0 is distorted, the sliding guide plate 10 only separates from the upper side plate portion 4 and the restoration of the upper side plate portion 4 is not hindered by the sliding guide plate 10, so the appearance is not impaired.

The resin bumper 2 consists of four vertical bolts 1 as a whole.
4 is supported on the vehicle body side, so that when a collision load is applied to the central part of the resin bumper 2, the resin bumper 2 as a whole bends back and at this time, the resin bumper 2 as a whole is fitted with a pair of bolts 14. Rotate around the center. Since the horizontal ribs 3 are rotatably supported on the vehicle body by the bolts 14 at the portions reinforced by the stayers 6, the resin bumper 2 does not receive an unreasonable restraint force, and is freely curved to absorb collision energy.

When a collision load is applied to the end portion of the resin bumper 2, the resin bumper 2 is curved with the bolt 14 as a fulcrum so that the radius of curvature as a whole becomes small. At this time, since the resin bumper 2 receives no restraint force from the support plate 8 and the sliding guide plate 10, the upper plate portion 4 is damaged by the sliding guide plate 10 and the restoration is hindered and the deformation remains. Absent.

[Advantages of the Invention] As described above, the present invention sandwiches a pair of left and right metal staplers having a U-shaped cross section between a pair of upper and lower horizontal ribs provided on the inner surface of the resin bumper and extending in the longitudinal direction. , The lower flange of a metal support plate having a U-shaped cross section is overlapped and joined to the stayer, and the resin bumper, each stayer, and each support plate are supported on the vehicle body by one vertical bolt. Then, connect the sliding guide plate of the same size as the longitudinal dimension of the resin bumper to the upper flange of the support plate, and superimpose the upper plate of the resin bumper on the sliding guide plate so that it can slide. The following effects are obtained.

(a) The upper plate part of the resin bumper is slidably supported by a metal sliding guide plate of substantially the same length as the resin bumper, which is supported by the horizontal ribs of the resin bumper via the stayer and the supporting plate. Therefore, the sagging due to thermal softening can be suppressed.

(b) The sliding guide plate and the supporting plate slide guide the upper plate part of the resin bumper against deformation of the resin bumper due to collision, and do not exert any restraint force on the upper plate part. Even when the support plate is permanently deformed, the upper plate portion restores its original shape and does not impair the appearance.

(c) Since the resin bumper has horizontal ribs supported by a pair of left and right staplers on the vehicle body with one bolt each,
In response to a local collision load, the resin bumper is bent and deformed as a whole centering on the bolt, and the impact on the vehicle body is mitigated.

(d) Compared to the conventional example in which a vertical rib that suppresses the sagging of the upper side plate is provided on the inner surface of the resin bumper, there is no sink mark due to resin molding and an excellent appearance is obtained, and the resin used It has a small amount and exhibits sufficient elastic deformation capacity against a collision load.

[Brief description of drawings]

FIG. 1 is a side sectional view showing a structure of a resin bumper according to the present invention, FIG. 2 is a perspective view of a sliding guide plate of the resin bumper, and FIG. 3 is a side sectional view of an attachment portion of a stayener to a vehicle body.
FIG. 4 is a perspective view of a general resin bumper, FIG. 5 is a plan view showing a mounting structure of the resin bumper to a vehicle body, and FIG. 6 is a side sectional view showing a main part of a conventional resin bumper. . 2: Resin bumper 3: Horizontal rib 4: Upper plate part 6:
Stay funner 7: Bolt 8: Support plate 8a, 8b: Flange 10: Sliding guide plate

Claims (1)

[Scope of utility model registration request] 1. A pair of upper and lower horizontal ribs extending in the longitudinal direction, which are provided on the inner surface of a resin bumper, sandwich a pair of left and right metal stapler having a U-shaped cross section to form a metal having a U-shaped cross section. The lower flanges of the support plates are overlapped and joined to the stayers, and the resin bumper, each stay funner, and each support plate are attached to each one.
These are supported on the vehicle body by vertical bolts, and a slide guide plate of the same size as the longitudinal dimension of the resin bumper is connected to the upper flange of the support plate, and the resin bumper is mounted on the slide guide plate. The structure of the resin bumper is characterized in that the upper side plate portion of the is overlapped so as to be slidable.