JP4359761B2 - Automotive bumper structure - Google Patents

Description

  The present invention relates to an automobile bumper structure, and more particularly to a plastic bumper fascia.

  As disclosed in Patent Document 1, the plastic bumper fascia is fixed to the vehicle body using a fastener such as a bolt on a shroud, a front cross member, or the like, which is a structure at the front of the vehicle body, for example. In addition, as disclosed in Patent Documents 1 and 2, a member such as a radiator grille is mounted on the bumper fascia, and this mounting accepts claws and hooks integrally formed with the radiator grill and the bumper fascia. It is attached to the bumper fascia using a combination with the opening.

JP 2002-59794 A JP-A-10-6891

  By the way, when the bumper fascia is thinned to reduce the weight of the car, there is a possibility that the merchantability of the car will be impaired if the bumper fascia bends and deforms with the force of pushing with a finger, for example. There is.

  In addition, automobiles that use plastic bumper fascias are often designed so that the bumper fascia occupies a large proportion at the front or rear of the car body, so the color of the bumper fascia is the same color as the car body. In many cases, for example, a two-color bumper fascia with the upper part made the same color as the vehicle body and the lower part made dark is also seen.

  On the other hand, for example, when the upper edge of the front bumper fascia at the front of the vehicle body constitutes the lower edge of the grill opening, the upper edge of the front bumper fascia plays an important role as a design line on the front surface of the vehicle body. Even if you want to add a different color to the part that includes the upper edge, especially when you want to add another color to the part that includes the upper edge, especially in the case of a bumper fascia that has a different color at the top and bottom. Since the work processes such as masking increase in the painting work, as a practical problem, it is difficult to put it into practice.

  An object of the present invention is to provide a bumper structure for an automobile that makes it possible to reduce the thickness of the bumper fascia by reinforcing the bumper fascia so that bending deformation of the bumper fascia can be suppressed.

  It is a further object of the present invention to provide a bumper structure for an automobile that can give a degree of freedom of color arrangement at the upper end of the bumper fascia.

According to the present invention, such a technical problem is
A bumper structure for an automobile in which a garnish is attached to an upper end portion of a bumper fascia, and a lower end edge of a grille opening is configured by the garnish,
The garnish includes a horizontal portion extending in the vehicle width direction along an upper end edge of the bumper fascia, and a leg portion that is integrated with the horizontal portion and extends downward from the horizontal portion,
This is achieved by providing a bumper structure for an automobile characterized in that the lower end of the leg portion is locked to a protruding portion protruding rearward from the back of the bumper fascia.

  That is, according to the bumper structure of the present invention, the upper end edge of the bumper fascia is reinforced by engaging the horizontal part of the garnish with the upper end edge of the bumper fascia, but the leg extending downward from the garnish horizontal part. Since the lower end of the part is locked to the protrusion formed on the back surface of the bumper fascia, the bumper fascia can be prevented from being easily bent and deformed by the load applied to the bumper fascia. Can be made thinner.

  Also, for example, even if the bumper fascia is color-coded in two colors, it is substantially the same as painting the bumper fascia into three colors by painting another color on the garnish which is a separate member. That is, the color scheme of the upper end of the bumper fascia can be freely changed by the color scheme of the garnish.

In a preferred embodiment of the present invention, the leg portion includes a central leg portion extending downward from a vehicle width direction central portion of the bumper fascia, and the protruding portion is fastened between the bumper fascia and the front cross member. A relatively rigid convex portion constituting the seat is included. And the lower end of the said center leg part is latched by the said convex part . Thereby, the support rigidity by a center leg part can be improved, and the bending deformation of the vehicle width direction center part of a bumper fascia can be prevented effectively.

  FIG. 1 is a schematic front view for explaining the front surface of an automobile provided with the bumper structure of the embodiment. This automobile 1 has a plastic front bumper fascia 2. The front bumper fascia 2 has a mounting plate 3 for a license plate in the center portion thereof. In the figure, reference numeral 3a is a bolt insertion hole for fixing the license plate.

  The front bumper fascia 2 also has a traveling wind intake 4 located below the number plate mounting seat 3. The traveling wind is sent to the radiator 5 through the intake 4 and is used for cooling a water-cooled engine (not shown) through the radiator 5. The front bumper fascia 2 also has fog lamp through holes 6 on both sides of the traveling wind intake 4.

  Above the front bumper fascia 2, a bonnet, that is, a front end edge of the engine hood 10 is located adjacent to the front bumper fascia 2, and a front end edge of the engine hood 10 and an upper end edge of the front bumper fascia 2 at the center portion in the vehicle width direction. A grille opening 11 is formed between them. In the figure, reference numeral 12 indicates a headlamp. The grill opening 11 has a narrow and narrow shape, and a plastic garnish 13 is provided between the lower end edge of the grill opening 11 and the upper end edge of the bumper fascia 2.

  The front bumper fascia 2 is painted differently at the upper part 16 and the lower part 17 with the boundary line 15 in between, and the upper part 16 is the same color as the vehicle body, but the lower part 17 is dark. The garnish 13 is painted dark. For example, if the material color of the bumper fascia 2 and garnish 13 is dark (matte black), only the upper part 16 of the bumper fascia 2 is painted, and the lower part of the bumper fascia 2 and the garnish 13 are unpainted material colors. May be.

2 and 3 are views showing the back surface of the front bumper fascia 2. On the rear surface of the front bumper fascia 2, a convex portion 2 a that protrudes toward the rear of the vehicle body is formed at a portion corresponding to the license plate mounting seat 3. The front bumper fascia 2 is fixed to the front cross member 22 by using a fastener 21 (FIG. 3) composed of a bolt and a nut on the convex portion 2 a. The convex portion 2a constitutes one of the “projection portions” of the present invention.

Referring to FIG. 4, garnish 13 has an elongated horizontal portion 130 extending in the vehicle width direction, and this horizontal portion 130 is disposed along the upper edge of front bumper fascia 2. The garnish 13 also has side leg portions 131 </ b> L and 131 </ b> R that extend downward from the left and right end portions of the horizontal portion 130, respectively. Since the left and right side leg portions 131L and 131R have substantially the same structure, they will be simply referred to as “side leg portions 131” when they are collectively described. In addition to the side legs 131, the garnish 13 has a center leg 132 that extends downward from the vehicle width direction center portion of the horizontal portion 130. The side leg 131 and the center leg 132 are connected to the horizontal portion 130, respectively. It is integrally molded. That is, the garnish 13 is an integrally molded product including the side legs 131 and the center legs 132. These side leg 131 and center leg 132 constitute the “leg” of the present invention.

The garnish horizontal portion 130 has a U-shaped cross section that opens rearward, and a plurality of openings 133 are formed in the lower wall of the garnish horizontal portion 130 at intervals from each other in the vehicle width direction. Further, the side leg 131 of the garnish 2 has a main body 131a extending curvedly along the back surface of the front bumper fascia 2, and the main body 131a extends in the vehicle width direction formed on the back surface of the front bumper fascia 2. It extends to a position where it can engage with the protrusion 2b, and an opening 133 is formed at the lower end of the side leg 131. The protrusion 2b constitutes another one of the “projection portion” of the present invention.

  The side leg portion 131 also has a wind guide plate portion 134 that extends from the side edge of the main body 131a on the outer side in the vehicle width direction to the rear of the vehicle body. The air guide plate portion 134 extends downward from the garnish horizontal portion 130, and its lower end terminates at a position adjacent to the ceiling wall of the front front cross member 22. The central leg portion 132 of the garnish 2 extends in a curved manner along the back surface of the front bumper fascia 2, and a pin 135 protruding downward is integrally formed at the lower end thereof.

  Corresponding to the opening 133 provided in the garnish horizontal portion 130 and the side leg portion 131 described above, a fastening element (not shown) such as a resilient nail or hook is integrally formed on the back surface of the front bumper fascia 2. The garnish horizontal portion 130 and the side leg portion 131 are fixed to the front bumper fascia 2 by inserting the fastening element into the opening 133 and engaging with the opening 133.

  Further, the garnish central leg 132 extends to the upper wall of the convex portion 20, and the pin 135 at the lower end of the central leg 132 is inserted into an insertion hole (not shown) formed in the upper wall of the convex portion 20. Thus, the lower end portion of the garnish center leg portion 132 is supported by the convex portion 20.

  According to the above configuration, the front bumper fascia 2 is reinforced by the garnish horizontal portion 130 disposed along the upper edge thereof, and the garnish horizontal portion 130 extends downward from the horizontal portion 130. The lower ends of the left and right side leg portions 131L and 131R and the central leg portion 132 engage with the protrusions 2b and the protrusions 2a formed on the back surface of the front bumper fascia 2, respectively, and these protrusions 2b and protrusions 2a. Therefore, it can be prevented that the upper end edge of the front bumper fascia 2 is bent and deformed by a load that is pressed by a finger. Therefore, even if the front bumper fascia 2 is thinned, it is possible to prevent easy bending deformation.

  In particular, as the element that supports the lower end of the central leg 132, a highly rigid convex portion 2a that constitutes a fastening seat with the front cross member 22 is used, and the lower end of the central leg 132 is caused to bear on the convex portion 2a. Therefore, it is possible to ensure the effect of preventing the above-described bending deformation of the front bumper fascia 2, particularly the bending of the central portion of the front bumper fascia 2 that easily causes this bending deformation.

  Further, the left and right side leg portions 131L and 131R are provided with the air guide plate portion 134, and the left and right air guide plate portions 134 guide the traveling wind introduced through the traveling wind intake 4 to the radiator 5. However, since the air guide plate portion 134 has a structure that is substantially upright from the main body 131a of the side leg portion 131 and widens rearward of the vehicle body, the strength of the side leg portion 131 is increased. Thus, the reinforcing effect on the front bumper fascia 2 described above can be enhanced. Of course, it is not necessary to separately provide a wind guide plate component.

  When the front bumper fascia 2 and the garnish 13 are injection-molded with the same resin material (for example, polypropylene resin), it is preferable to manufacture them from a single mold.

  FIG. 5 shows a product 30 that has been die-cut from a mold. The product 30 includes a front bumper fascia 2 and a garnish 13. The illustrated dots P1 to P6 indicate gates for injecting resin into a product part of a molding die, and reference numeral 25 denotes a product part from the gate. A plastic material cured by a resin passage that leads to, and this resin passage portion 25 is cut from the front bumper fascia 2 and the garnish 13.

  The gate indicated by P6 in FIG. 5 is located at the lower end of the central leg 132 of the garnish 13, and resin is supplied to the garnish 13 through the gate P6. Resin is supplied to the central part of the.

  That is, the gate P6 plays a role of supplying resin to both the garnish 13 and the front bumper fascia 2, but temporarily forms the garnish 13 having only the left and right side legs 131 without the central leg 132. Even in such a case, the gate P6 is necessary. In this case, the portion of the central leg 132 is used as a resin passage for supplying the resin from the gate P6 to the garnish 13. Are discarded after being cut out after being molded.

  On the other hand, in the garnish 13 provided with the central leg portion 132, as can be seen from the above description, the central leg portion 132 supplies the resin supplied through the gate P6 to the bumper fascia 2 and the garnish horizontal portion 130. Part of a continuous resin passage for supplying to For this reason, if the garnish without a central leg is used as a component of the garnish 13 (central leg 132), the resin passage portion to be disposed of can be used effectively while using the central leg 132. The front bumper fascia 2 described above can be reinforced.

It is a partial front view of the motor vehicle provided with the bumper structure of the Example containing a garnish and a front bumper fascia. It is a rear view of the bumper fascia with a garnish of FIG. It is a fragmentary perspective view which expands and shows the center part of the bumper fascia which equipped with the garnish. It is the perspective view which looked at the garnish from the vehicle body back side. It is a figure for demonstrating the gate position of the shaping die with respect to the product taken out from the shaping die after shape | molding a front bumper fascia and a garnish with one shaping die.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Automobile 2 Front bumper fascia 2a Convex part which comprises fastening seat with front cross member 2b Projection of back of bumper fascia 4 Running wind intake 10 Engine hood 11 Grill opening 13 Garnish 20 Resin passage from gate to product part Part 130 Horizontal part of garnish 131 Side leg part of garnish 132 Central leg part of garnish 134 Air guide plate part of side leg part

Claims (4)

And garnish is attached to the upper portion of the bun parfait doctor The vehicle bumper structure under edge is constituted of the grille opening by the garnish,
The garnish includes a horizontal portion extending in the vehicle width direction along an upper end edge of the bumper fascia, and a leg portion that is integrated with the horizontal portion and extends downward from the horizontal portion,
A bumper structure for an automobile, wherein a lower end of the leg portion is locked to a protruding portion protruding rearward from the rear surface of the bumper fascia. The leg portion includes a central leg portion extending downward from a central portion in the vehicle width direction of the bumper fascia,
The protruding portion includes a convex portion that constitutes a fastening seat between the bumper fascia and the front cross member ,
The lower end of the central leg portion is engaged with the convex portion, automobile bumper structure according to claim 1.   The bumper fascia and the garnish are injection-molded together by one molding die, the gate of the molding die is located at the central leg, and the resin supplied through the gate is supplied with the resin of the bumper fascia and the garnish. The automobile bumper structure according to claim 2, wherein a part of the continuous resin passage for supplying to the main body is constituted by the central leg portion. The leg portions of the garnish include left and right side leg portions extending downward from a position spaced apart in the vehicle width direction of the horizontal portion,
Includes a wind guide plate portion, each of the left and right side leg extends toward the rear of the vehicle body, traveling wind by the wind guide plate portion of the left and right are guided to the radiator, according to claim 1 Bumper structure for automobiles.

Images