JP2020131949A - Front bumper attachment structure - Google Patents

Abstract

To accurately attach a front bumper to a vehicle body by employing an attachment form of an L-shaped flange (negative pressure flange) even if a shape of a parting part of the front bumper in a plane view is included in a curve.SOLUTION: A front bumper attachment structure comprises attachment members 18 integrally formed at a front bumper main body 14, and extending to the outside from a surface of an upper side of the front bumper main body 14 via integral hinge parts 20, being attachment members 18 which are partially arranged in a vehicle width direction in a plurality of pieces. Each of the attachment members 18 includes a plate-shaped connecting part 22 connected to the integral hinge part 20, and a plate-shaped fixing part 24 connected to an end part of the connecting part 22 at a side opposite to the integral hinge part 20, and extending from the connecting part 22. The attachment members 18 are folded toward a lower part of a vehicle body with the integral hinge parts 20 as axes, and bottoms of the fixing parts 24 of the attachment parts 18 are fixed to a vehicle body structure 50.SELECTED DRAWING: Figure 5

Description

The present invention relates to a mounting structure of a front bumper of a vehicle, and more particularly to a mounting structure to a vehicle body structure on the upper side of the front bumper.

FIG. 3 of Patent Document 1 discloses a structure in which the front bumper is attached to the vehicle body structure via a flange provided at the upper end of the front bumper of the vehicle. The flange has an L-shape with a vertical part extending downward from the upper end of the front bumper and a horizontal part extending from the tip of the vertical part toward the rear of the vehicle body, and the horizontal part of the flange is the vehicle body structure via the retainer. It is fixed to an object.

Japanese Unexamined Patent Publication No. 2000-118331

By the way, for the purpose of enhancing the appearance beauty of the vehicle, it is conceivable to make the parting portion of the engine hood and the front bumper on the front side of the vehicle curved in a plan view. In that case, as shown in FIG. 8, it is necessary to make the parting portion 16a at the upper end of the front bumper main body 14 curved. At this time, as shown in FIG. 8, an L-shaped flange (the flange described in Patent Document 1, hereinafter also referred to as a negative angle flange) for attaching the front bumper 12 to the vehicle body structure is attached to the upper end of the front bumper main body 14. It is conceivable to mold uniformly over the vehicle width direction (see reference numeral 110). However, it is very difficult to form such an L-shaped flange 110. For example, in the case of the resin front bumper 12, the front bumper 12 is molded using a mold, but it is difficult to remove the mold from the curved L-shaped flange 110, and the L-shaped flange 110 is on the upper side due to demolding. It distorts toward. Therefore, it is difficult to accurately mount the front bumper on the vehicle body by adopting the mounting form of the L-shaped flange.

An object of the present invention is to adopt an L-shaped flange mounting form to accurately attach the front bumper to the vehicle body even when the shape of the parting portion of the front bumper in a plan view includes a curved line to increase the degree of freedom in shape. It is to be able to be attached.

The front bumper mounting structure of the present invention is a mounting member integrally molded with the front bumper body and extending outward from the upper surface of the front bumper body via an integral hinge portion, and is partially formed in the vehicle width direction. A plurality of mounting members are provided, and each mounting member is connected to a plate-shaped connecting portion connected to the integral hinge portion and an end portion of the connecting portion opposite to the integral hinge portion. Each mounting member is bent downward toward the vehicle body with the integral hinge portion as an axis, including a plate-shaped fixing portion extending from the connecting portion, and the bottom of the fixing portion of the mounting member is a vehicle body structure. It is characterized by being fixed to an object.

According to the present invention, a plurality of mounting members (corresponding to L-shaped flanges) including a connecting portion and a fixing portion are partially provided in the vehicle width direction. When molding the front bumper, each mounting member is accurately molded at a position where it can be easily removed, and when mounting the front bumper on the vehicle body structure, each mounting member is oriented downward from the vehicle body with each integral hinge as the axis. Can be bent to change the mounting form. As a result, even when the shape of the parting portion of the front bumper in the plan view includes a curved line, each mounting member can be provided with desired accuracy, and the front bumper can be mounted on the vehicle body with high accuracy.

It is a perspective view which shows an example of the front side of a vehicle. It is a figure which shows typically a plurality of mounting members in a molded state. It is a figure which shows typically a plurality of mounting members in an assembled state. It is a perspective view which shows the mounting member and an inner grill before assembling. FIG. 4 is a sectional view taken along the line AA of FIG. It is sectional drawing which shows the mounting member and the inner grill in an assembled state. It is a perspective view which shows another mounting member before assembling. It is a figure for demonstrating the structure which provided the L-shaped flange uniformly in the vehicle width direction to the front bumper which the shape of a parting part is curved in a plan view.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The shapes, materials, etc. described below are examples for explanation, and can be appropriately changed according to the specifications of the front bumper and the vehicle body structure to which the front bumper is attached. Similar elements are designated by the same reference numerals in all drawings, and duplicate description is omitted. As shown in some drawings, the arrow FR means the vehicle forward direction, and the arrow UP means the vehicle upward direction.

FIG. 1 is a perspective view showing an example of the front side of the vehicle 10. The parting portion 16 which is the boundary between the front bumper 12 and the engine hood 90 is formed in a curved shape, and the upper end (parting portion 16a) of the front bumper 12 is also formed in a curved shape for the purpose of enhancing the aesthetic appearance of the vehicle 10. ..

2 and 3 are views schematically showing mounting members 18 and 19 for mounting the upper side of the front bumper 12 on the inner grill (body structure), and FIG. 2 shows mounting members 18 and 19 in a molded state. Shown, FIG. 3 shows mounting members 18 and 19 in a state of being mounted on the inner grill (assembled state). The front bumper 12 is made of resin, and includes a front bumper main body 14 and a plurality of mounting members 18 and 19 partially provided in the vehicle width direction. Each of the mounting members 18 and 19 is integrally molded with the front bumper main body 14, and extends outward from the upper surface of the front bumper main body 14 via the integral hinge portion 20 as shown in FIG. In the present embodiment, two mounting members 18 are provided near the center in the vehicle width direction, and one mounting member 19 is provided near both ends in the vehicle width direction. Although there are some differences between the mounting member 18 and the mounting member 19, the basic structure is the same. The difference between the mounting member 18 and the mounting member 19 will be described later.

As shown in FIG. 2, the mounting members 18 and 19 are connected to a plate-shaped connecting portion 22 connected to the integral hinge portion 20 and an end portion of the connecting portion 22 opposite to the integral hinge portion 20. A plate-shaped fixing portion 24 extending upward at an angle close to a right angle with respect to the connecting portion 22 is included. The mounting members 18 and 19 are molded together with the front bumper main body 14 using a mold, and are accurately molded at a position where the mold can be easily removed.

Then, as shown in FIG. 3, the mounting members 18 and 19 are bent toward the lower part of the vehicle body around each integral hinge portion 20, and the fixing portions 24 of the mounting members 18 and 19 are fixed to the inner grill. To. As a result, the upper side of the front bumper 12 is attached to the inner grill.

Next, the detailed structure of the mounting member 18 and the assembled state will be described. FIG. 4 is a perspective view showing the mounting member 18 and the inner grill 50 before the mounting member 18 is bent downward to the vehicle body, and FIG. 5 is a sectional view taken along the line AA of FIG. As shown in FIG. 4, a hole 26 through which the fixing screw is passed is provided near the center of the fixing portion 24 of the mounting member 18. The inner grill 50 is provided with a hole 56 in which the hole 26 of the fixing portion 24 of the mounting member 18 is aligned and the fixing screw is screwed when the mounting member 18 is bent. Further, two ribs 28a and 28b are provided on the back surface of the fixing portion 24 of the mounting member 18. The inner grill 50 is provided with rib receivers 54a and 54b so as to correspond to the ribs 28a and 28b of the mounting member 18. A seat portion 52 projecting upward is provided around the hole 56 of the inner grill 50, and the upper surface of the seat portion 52 is a seat surface 53 that receives the back surface of the fixing portion 24 of the mounting member 18.

As shown in FIG. 5, the integral hinge portion 20 is formed thinly. The integral hinge portion 20 may be configured such that a notch is provided on the upper surface of the wall thickness and the mounting member 18 is rotated (bent) with the lower side thereof as a rotation axis.

In FIG. 5, the mounting structure on the lower side of the front bumper 12 is shown below the dividing line D. In FIG. 5 and FIG. 6 described below, the intermediate portion of the front bumper 12 in the vertical direction of the vehicle is omitted. The front bumper 12 includes a lower fixing portion 46 that also serves as a seating surface for attaching design parts such as an emblem (brand mark), and the lower fixing portion 46 is a hole that extends in the front-rear direction of the vehicle and opens toward the rear of the vehicle. 47 is provided. The inner grill 50 is provided with a lower side wall 70, and the lower side wall 70 is provided with a hole 72 corresponding to the position of the hole 47 of the front bumper 12. The fixing screw 82 is inserted into the holes 72 and 47 from the inner grill 50 side and screwed into the inner wall of the hole 47. As a result, the lower side of the front bumper 12 is fixed to the inner grill 50.

FIG. 6 is a cross-sectional view showing the mounting member 18 and the inner grill 50 in the assembled state. In FIG. 6, the engine hood 90 is also drawn. The mounting member 18 is bent downward with the integral hinge portion 20 as the axis, and the bottom of the fixing portion 24 of the mounting member 18 is in contact with the seat surface 53 of the inner grill 50. Then, each of the inner walls of the ribs 28a and 28b of the fixing portion 24 of the mounting member 18 is pressed against the outer walls of the rib receivers 54a and 54b of the inner grill 50 to position the fixing portion 24 of the mounting member 18 in the vehicle front-rear direction. Has been done. The fixing screw 80 is inserted into the hole 26 and the hole 56 of the inner grill 50 from the upper side of the fixing portion 24, and is screwed into the inner wall of the hole 56. As a result, the upper side of the front bumper 12 is fixed to the inner grill 50 via the mounting member 18.

Here, in the present embodiment, the rib 60 (see FIGS. 4 and 6) and the rib 62 (see FIG. 6) are placed on the upper side wall 58 of the inner grill 50 facing the back surface of the connecting portion 22 of the mounting member 18 in the assembled state. Is provided. As shown in FIG. 6, the rib 60 is a portion protruding from the upper side wall 58 to the rear side of the vehicle, and is a gap between the upper side wall 58 of the inner grill 50 and the back surface of the connecting portion 22 of the mounting member 18 in the assembled state. It has a function to fill the grill. Further, the rib 62 is a portion protruding from the upper side wall 58 toward the front side of the vehicle, and has a function of closing the gap between the upper side wall 58 of the inner grill 50 and the back surface of the front bumper main body 14 in the assembled state.

The ribs 28a and 28b of the fixing portion 24 of the mounting member 18 are pressure-welded to the rib receivers 54a and 54b of the inner grill 50, so that the back surface of the connecting portion 22 of the mounting member 18 attaches the rib 60 of the inner grill 50 to the front of the vehicle. You will push hard toward. As a result, the inner grill 50 is strongly sandwiched between the back surface of the connecting portion 22 and the back surface of the front bumper main body 14, and the upper side of the front bumper 12 is strongly fixed to the inner grill 50 in the front-rear direction of the vehicle. Further, since the fixing portion 24 of the mounting member 18 is pushed forward by the rib receiver 54a of the inner grill 50 and the connecting portion 22 of the mounting member 18 is pushed rearward by the rib 60 of the inner grill 50, the connecting portion 22 A force is applied so that the angle formed by the upper surface and the upper surface of the fixing portion 24 is narrowed, so that the structure is difficult to spread. That is, even if the upper tip of the connecting portion 22 is pulled diagonally downward by the front bumper main body 14, the angle formed by the connecting portion 22 and the fixing portion 24 is not easily deformed.

The front bumper 12 may move to the lower side of the vehicle body (bumper hangs down) due to vehicle vibration, heat, etc. When the bumper hangs down, the parting portion 16a of the front bumper 12 and the parting portion 16b of the engine hood 90 The interval becomes wide. In the present embodiment, by adopting the above structure in addition to the fixing screw 80, a strong fixing force is generated on the upper side of the front bumper 12 and the inner grill 50, and the deformation of the mounting member 18 is suppressed, so that the front bumper main body 14 Can be accurately pulled up and behind the vehicle, and bumper sagging can be effectively suppressed.

Next, the difference between the mounting member 18 and the mounting member 19 shown in FIGS. 2 and 3 will be described. FIG. 7 is a perspective view showing the mounting member 19 before being bent downward to the vehicle body. The mounting member 19 has a connecting portion 22 that is wider than the mounting member 18, and ribs 28a and 28b on the back surface of the fixing portion 24 are formed obliquely. Moreover, the length of the rib 28a is short. The mounting member 19 has a feature that the fixing portion 24 is provided with a step portion 41 (shelf shape). The step portions 41 are provided at both ends in the width direction of the fixing portion 24 (horizontal direction in FIG. 7) (only one step portion 41 is visible in FIG. 7), and the plate of the fixing portion 24 is a connecting portion. This is the part that goes up one step toward 22. By providing the step portion 41, the angle formed by the upper surface of the connecting portion 22 and the upper surface of the fixing portion 24 does not easily widen in the assembled state (see FIG. 6), and there is an effect of suppressing the bumper sagging. The step portion 41 may be provided not only on the mounting member 19 but also on the mounting member 18.

Next, the action and effect of the mounting structure of the front bumper 12 of the present embodiment described above will be described. According to the present embodiment, as shown in FIG. 2, a plurality of mounting members 18, 19 (L-shaped flanges) including the connecting portion 22 and the fixing portion 24 are partially provided in the vehicle width direction. When molding the front bumper 12, the mounting members 18 and 19 are accurately molded at positions where they can be easily removed. Then, as shown in FIG. 3, when the front bumper 12 is attached to the inner grill (vehicle body structure), the attachment members 18 and 19 are bent downward from each integral hinge portion 20 as an axis. It can be changed to the mounting form. As a result, even when the shape of the parting portion 16a of the front bumper 12 in a plan view includes a curved line, the mounting members 18 and 19 can be provided with desired accuracy, and the front bumper 12 can be accurately mounted on the vehicle body. Can be attached. Therefore, as shown in FIG. 6, the accuracy of the distance between the parting portion 16a of the front bumper 12 and the parting portion 16b of the engine hood 90 can be improved. Further, as described above, since the present embodiment is provided with a mechanism for preventing the bumper from sagging, the accuracy of the interval can be further improved even when the vehicle is used.

Further, since the front bumper mounting structure of the present embodiment adopts the form of an L-shaped flange (negative angle flange), a space can be secured under the engine hood 90 as shown in FIG. This space allows the engine hood 90 to sink (strongly closed stroke) when the engine hood 90 is tightly closed from above. Further, according to the present embodiment, since the mounting members 18 and 19 are molded at a position where they can be easily removed from the mold, the connecting portion 22 of the mounting members 18 and 19 can be formed to be long, and the long connecting portion 22 can be used. It is also possible to secure a larger space under the engine hood 90 by setting the position of the fixing portion 24 of the mounting members 18 and 19 to a lower position in the assembled state. As a result, the mounting structure of the front bumper 12 of the present embodiment can be adopted even in a vehicle having a large sinking amount (strongly closed stroke amount) of the engine hood 90.

Since the surface coating of the integral hinge portion 20 may be peeled off when the integral hinge portion 20 is bent and the appearance may be deteriorated, the hood arranged on the fixing portions 24 of the mounting members 18 and 19 in the assembled state. The upper surface of the integral hinge portion 20 may be hidden by a seal (not shown).

10 vehicles, 12 front bumpers, 14 front bumper bodies, 16, 16a, 16b parting parts, 18, 19 mounting members, 20 integral hinge parts, 22 connecting parts, 24 fixing parts, 26 holes, 28a, 28b ribs, 41 steps Part, 46 Lower fixing part, 47 holes, 50 Inner grill (body structure), 52 Seat part, 53 Seat surface, 54a, 54b Rib receiver, 56 holes, 58 Upper side wall, 60, 62 ribs, 70 Lower side wall , 72 holes, 80, 82 fixing screws (screws), 90 engine hood, 110 L-shaped flange.

Claims (1)

A mounting member that is integrally molded with the front bumper body and extends outward from the upper surface of the front bumper body via an integral hinge portion, and includes a plurality of mounting members that are partially provided in the vehicle width direction.
Each of the mounting members is connected to a plate-shaped connecting portion connected to the integral hinge portion and an end portion of the connecting portion on the opposite side of the integral hinge portion, and has a plate-like shape extending from the connecting portion. Including fixed parts
Each mounting member is bent downward with the integral hinge portion as an axis, and the bottom of the fixing portion of each mounting member is fixed to the vehicle body structure.
The front bumper mounting structure is characterized by this.